TWI762298B - Pipe fitting fixing device for pipe joint - Google Patents

Abstract

The present invention provides a pipe fitting fixing device for pipe joint, which despite its simple structure, it can increase the force of preventing the pipe fitting from detaching without inserting an in-core. It is equipped with a tilting mechanism so that when the stop ring connection part and the opposite part are in contact with each other, the stop ring is tilted in the direction of the pipe axis relative to a reference plane orthogonal to the center axis of the ring body so that the circumferential end of the ring body is close to the body of the joint and the circumferential central part of the ring body is separated from the body of the joint. The first surface of the opposing part is parallel to the datum surface opposite to the stop ring connection part. The second surfaces of the plural stop ring connection part and the opposing part are each located in the same inclined plane opposite to the reference plane in the direction of the pipe axis. The distance between the first surface and the inclined surface increases from the end of the circumferential direction to the center of the circumferential direction.

Description

Pipe fitting fixing device for pipe joint

The present invention relates to a pipe fitting fixing device for a pipe joint, in particular to a pipe fitting with a stop ring, the diameter of the C-shaped annular ring body is reduced by the tightening device, and is fastened on the outer peripheral surface of the joint pipe ; a pressure ring, which presses the gasket on the socket part of the joint body; and a connecting device, the stop ring and the pressure ring are connected to the pipe fitting fixing device of the pipe joint of the joint body.

Conventionally, as a pipe fitting fixing device of a pipe joint as described above, for example, a pipe fitting fixing device of a pipe joint described in Japanese Patent Document 1 is known. In the conventional pipe fixing device, as shown in FIG. 28 , when a tensile force is generated in the joint pipe 100 in the pipe axis direction X, the plane of the stop ring connecting portion 32 ′ of the stop ring 3 ′ and the plane of the connecting device 5 ′ The flat surfaces of the flange portions 54' abut against each other to resist the pulling force. In conventional tube fixtures, there are cases where an in-corn may be inserted into the joint tube to increase the force used to prevent the tube from disengaging. However, in order to improve workability and the like, it is desired to further increase the force for preventing the pipe from being detached without inserting the inner core.

[Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2015-190608

In view of such a conventional situation, an object of the present invention is to provide a pipe fitting fixing device for a pipe joint which can further improve the force for preventing the pipe fitting from being detached without inserting an inner core (In-core) despite its simple structure.

In order to achieve the above object, the pipe fitting fixing device of the pipe joint according to the present invention is characterized by comprising: a stop ring, the diameter of the C-shaped annular ring body is reduced by the tightening means, and is tightened on the outer peripheral surface of the joint pipe a pressure ring that presses the gasket on the socket portion of the joint body; and a connecting device, the stop ring and the pressure ring are connected to the joint body, wherein the stop ring has: a pair of protruding pieces, provided At both circumferential ends of the ring body, there are through holes penetrating the fastening device; teeth are provided on the inside of the ring body, and are engaged in the joint pipe by reducing the diameter of the fastening device; and A plurality of stop ring connecting parts are arranged at appropriate intervals along the circumferential direction of the ring body and have stop ring penetration parts passing through the connecting device, the pressure ring has a plurality of pressure ring connection parts, and the plurality of pressure rings are connected There is a pressure ring through hole in the pipe axis direction, the pressure ring through hole faces the plurality of stop ring connection parts in the pipe axis direction, and passes through the connection device. The connection device has: a first through member, which penetrates the joint body. a through hole and the press ring through hole; and a second through member having: a connecting portion penetrating the stop ring through portion and connected to the first through member; and an opposing portion facing in the pipe axis direction The stop ring connecting portion, in a state in which the ring body is reduced in diameter by the tightening device, is provided with a tilting mechanism that, when the stop ring connecting portion and the opposing portion come into contact with each other, the stop ring The moving ring is inclined in the direction of the pipe axis with respect to a reference plane orthogonal to the central axis of the ring body so that the circumferential end of the ring body is close to the joint body, and the circumferential central part of the ring body is separated from the joint body. The joint body is separated, the first surface of the opposite portion opposite to the stop ring connecting portion is parallel to the reference plane, and the second surfaces of the plurality of stop ring connecting portions and the opposite portion opposite to the opposite portion are respectively located opposite to the reference plane. The reference plane is the same inclined surface inclined in the pipe axis direction, and the distance between the first surface and the inclined surface increases from the circumferential end portion to the circumferential center portion.

With the above configuration, the connecting device includes: a first through member that penetrates the through hole of the joint body and the pressure ring through hole; and a second through member that includes a connecting portion that penetrates through the stop ring through portion and is connected to the first through member; and an opposite portion facing the stop ring connecting portion along the pipe axis direction. The first surface of the opposite part opposite to the stop ring connecting part is parallel to the reference plane orthogonal to the central axis of the ring body, and the second surfaces of the plurality of stop ring connecting parts and the opposite part are respectively located relative to the reference plane. For the same inclined surface whose surface is inclined in the pipe axis direction, the distance between the first surface and the inclined surface increases from the circumferential end to the circumferential center. Here, in the state where the diameter of the ring body is reduced by the tightening device, it is better for the teeth of the stop ring to be on the circumferential end side where the tightening device is located than on the circumferential center side of the ring body Since the joint pipe is snapped together, a larger force for preventing the disengagement of the pipe is generated at the end portion in the circumferential direction than at the central portion in the circumferential direction. Therefore, when the pipe pulling force is applied to the joint pipe, the joint pipe extends more on the circumferential direction end portion side than the circumferential direction central portion, and the stop ring connecting portion and the opposing portion come into contact with each other. When further pipe tension is applied, due to the distance (gap) between the first surface and the inclined surface, the inclination mechanism inclines the stop ring relative to the reference plane in the direction of the pipe axis, thereby bringing the circumferential ends of the ring body closer to each other. the joint body, and the circumferential center portion of the ring body is separated from the joint body. As a result, the ring body engages the circumferential end portion side and the circumferential direction central portion side of the joint pipe, respectively, and deforms (bends) the joint pipe. This deformation of the joint tube becomes a large resistance to the pulling force of the tube. Furthermore, the inclination of the stop ring also increases the degree of engagement of the teeth in the vicinity of the central portion in the circumferential direction. Therefore, the deformation of the ring body and the engagement of the teeth will become a large resistance to the pulling force of the pipe, and the force to prevent the pipe from being disengaged can be significantly increased.

In addition, as a first embodiment, the plurality of stop ring connecting parts have: a pair of first stop ring connecting parts, adjacent to the pair of protruding pieces; and a pair of second stop ring connecting parts, which are opposite to each other. Adjacent to the pair of first snap ring connecting portions, the pair of first snap ring connecting portions and the pair of second snap ring connecting portions are relative to a center line connecting the central axis and the circumferential center portion In a line-symmetric configuration, the first stop ring through portion of the first stop ring connecting portion can be a long hole, and the long hole means that the connecting portion can slide along the circumferential direction of the ring body and has a wider width than the opposite portion. Narrow, the second stop ring penetration part of the second stop ring connecting part is a long hole, the long hole is that the connecting part can slide along the direction of the center line and the width is narrower than the opposite part.

The first stop ring through part of the first stop ring connecting part is a long hole, the long hole is that the connecting part can slide along the circumferential direction of the ring body and has a narrower width than the opposite part, and the second stop ring connecting part has a long hole. The through portion of the second retaining ring is an elongated hole, and the elongated hole means that the connecting portion can slide along the direction of the center line and is narrower in width than the opposite portion. As a result, when the diameter of the stopper ring is reduced, the connecting portion penetrating the stopper ring penetration portion does not hinder the diameter reduction, and the diameter can be smoothly reduced along the long hole. Furthermore, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

In addition, as a second embodiment, the plurality of snap ring connecting portions have: a pair of first snap ring connecting portions adjacent to the pair of protruding pieces; and a second snap ring connecting portion located on the circumference a direction center portion, the pair of first snap ring connecting portions are arranged in a line-symmetrical manner with respect to a center line connecting the central axis and the circumferential center portion, and the first snap ring of the first snap ring connecting portion penetrates The connecting part is a long hole, the connecting part can slide along the circumferential direction of the ring body and the width is narrower than the opposite part, the second stop ring through part of the second stop ring connecting part can be a long hole , the long hole is that the connecting part can slide along the direction of the center line and the width is narrower than the opposite part.

The first stop ring through part of the first stop ring connecting part is a long hole, the long hole is that the connecting part can slide along the circumferential direction of the ring body and has a narrower width than the opposite part. The through parts of the two retaining rings are long holes, and the long holes are the connecting parts which can slide along the direction of the center line and are narrower in width than the opposite parts. As a result, when the diameter of the stopper ring is reduced, the connecting portion penetrating the stopper ring penetration portion does not hinder the diameter reduction, and the diameter can be smoothly reduced along the long hole. Furthermore, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

In addition, as a third embodiment, the plurality of snap ring connecting portions are composed of a pair of snap ring connecting portions located at the center portion between the circumferential central portion and the circumferential end portion of the ring body, the A pair of snap ring connecting parts are arranged in a line-symmetric manner with respect to the center line connecting the central axis and the central part in the circumferential direction, and the snap ring penetrating part of the snap ring connecting part may be an elongated hole or one side with an opening. The concave part, the long hole or the concave part is slidable by the connecting part and has a narrower width than the opposite part.

The first stop ring through part of the first stop ring connecting part is a long hole or a concave part with one side opening, the long hole or the concave part is slidable by the connecting part and has a narrower width than the opposite part. As a result, when the diameter of the stopper ring is reduced, the connecting portion penetrating the stopper ring penetration portion does not hinder the diameter reduction, and the diameter can be smoothly reduced along the long hole. Furthermore, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

In addition, as a fourth embodiment, the plurality of snap ring connecting portions include: a pair of first snap ring connecting portions adjacent to the pair of protruding pieces; a pair of first snap ring connecting portions adjacent to the circumferential center portion a pair of second stop ring connection parts; and a pair of third stop ring connection parts located between the first stop ring connection part and the second stop ring connection part, the pair of first stop ring connection parts The pair of second snap ring connecting portions and the pair of third snap ring connecting portions are arranged line-symmetrically with respect to the center line connecting the central axis and the circumferential center portion, and the snap rings are connected to each other. The stop ring penetration part of the first part can be a long hole, and the long hole means that the connecting part can slide along the circumferential direction of the ring body and has a width narrower than that of the opposite part.

The stop ring through portion of each stop ring connecting portion is an elongated hole, and the elongated hole is that the connecting portion can slide in the circumferential direction of the ring body and is narrower in width than the opposite portion. As a result, when the diameter of the stopper ring is reduced, the connecting portion penetrating the stopper ring penetration portion does not hinder the diameter reduction, and the diameter can be smoothly reduced along the long hole. Furthermore, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

Furthermore, as a fifth embodiment, in addition to the above-mentioned first embodiment, the plurality of snap ring connecting portions are further provided with a pair of third snap ring connecting portions, which are located between the first snap ring connecting portion and the second snap ring connecting portion. Between the stop ring connection parts, the pair of third stop ring connection parts are arranged in a line-symmetrical manner with respect to the center line connecting the central axis and the circumferential center part, and the third stop ring connection part The through portion of the three retaining rings can be an elongated hole, and the elongated hole means that the connecting portion can slide along the circumferential direction of the ring body and is narrower in width than the opposite portion.

The first and third stop ring penetrating parts of the first and third stop ring connecting parts are long holes, and the long hole means that the connecting part can slide in the circumferential direction of the ring body and has a narrower width than the facing part. The second stop ring penetrating part of the two stop ring connecting parts is a long hole, the long hole is that the connecting part can slide along the direction of the center line and the width is narrower than that of the facing part. As a result, when the diameter of the stopper ring is reduced, the connecting portion penetrating the stopper ring penetration portion does not hinder the diameter reduction, and the diameter can be smoothly reduced along the long hole. Furthermore, since the connecting portion does not come off from the stop ring penetration portion during and after the diameter reduction, it is possible to secure a force for preventing the pipe from coming off.

In any of the above embodiments, the joint pipe is a high performance polyethylene pipe (HPPE/PE100) with a nominal diameter of 100 or more. Furthermore, in other embodiments, the jointed pipe may be a high performance polyethylene pipe (HPPE/PE100) with a nominal diameter of 75 or greater.

In any of the above embodiments, the first through member may be a T-bolt and the second through member may be a flanged cap nut. If so, the connecting device may be further provided with a contact member, and the first through member penetrates and contacts the connecting portion and the pressing ring connecting portion. Due to this contact member, the contact area of the connecting portion of the flanged cap nut relative to the pressure ring connecting portion becomes wider (larger), and the contact member does not rotate together with the flanged cap nut. Therefore, even if the flanged cap nut is in contact with the stop ring connection part when the stopper is tightened, the T-bolt and flanged cap nut tightened by the contact member can slide smoothly without interfering with the movement of the stopper. Reduced diameter. Furthermore, this makes it easy to adjust the gap (spacing) between the snap ring connecting portion and the flange portion without manufacturing the flanged cap nut depending on the thickness of the snap ring connecting portion (width in the pipe axis direction X) .

In any of the above embodiments, the inclined surface may be inclined within 5° and greater than 0° relative to the reference plane in the pipe axis direction. With this angle, the amount of expansion and contraction can be ensured inside the joint, and the force to prevent the pipe fitting from being detached can be ensured, and since the joint pipe does not fall off the gasket and cause water leakage, the workability is good.

Effects of the present invention:

According to the feature of the pipe fitting fixing device of the pipe joint of the present invention, despite its simple structure, the force for preventing the pipe fitting from being detached can be further improved without inserting the inner core.

Other objects, configurations and effects of the present invention will become apparent from the following parts of the embodiments of the present invention.

In order to make the technical content used in the present invention, the purpose of the invention and the effect achieved by the present invention more completely and clearly disclosed, it is explained in detail below, and please refer to the disclosed drawings and drawing numbers together:

The first embodiment of the present invention will now be described in detail with reference to FIGS. 1 to 7 .

[Overview of Device 1]

As shown in FIGS. 1 to 3 , the pipe fixing device 1A according to the first embodiment of the present invention is provided with a stop ring 3A, a ring body 30A having a slightly C-shaped ring is reduced in diameter by the fastening device 9 , and Fastened on the outer peripheral surface of the joint tube 100; pressing ring 4A, pressing the gasket 6 on the socket part 21 of the joint body 2; connecting device 5, connecting and fixing the stop ring 3A and the pressing ring 4A to the joint body 2 ; and the tilt mechanism 7 described later.

[Joint tube 100]

In this embodiment, the joint pipe 100 is used as a high-performance polyethylene pipe (Higher Performance Polyethylene, also referred to as "HPPE", "third-generation high-density polyethylene pipe") such as a polyethylene pipe for water supply. The diameter is 150. In the case of the polyethylene pipe including this high-performance polyethylene pipe (PE100), unless the diameter of the pipe is slightly reduced from the outer diameter of the pipe via the stop ring 3A, it is difficult to prevent the pipe from falling off. According to the pipe fixing device 1 of the present invention, in such a plastic pipe having elasticity and flexibility (softness), the holding force of the pipe (detachment preventing force) is improved without using the inner core and also Improve workability without hindering reduction.

In addition, the so-called PE100 series ISO 9080: 97.5% lower confidence limit of the long-term hydrostatic strength obtained by the method specified in "Plastic pipes and piping systems - Measurement of long-term hydrostatic strength by extrapolation of thermoplastic materials in pipe shape" Values range from 10.00 to 11.29 MPa and are classified as MRS Minimum Required Strength = 10.0 MPa. In addition, the so-called long-term hydrostatic strength (minimum required strength) is calculated (predicted) from the data of the internal pressure creep test based on the stress value in the circumferential direction to allow the pipeline to withstand a service life of 50 years at 20°.

For high performance polyethylene pipe (SDR11 PE100), relative to the strength of the pipe body, the force to ensure that the fitting is prevented from disengaging further exceeds the specified test load specified for each nominal diameter. Therefore, according to the British Water Pipe Industry Standard, the strength of the so-called high-performance polyethylene pipe is as follows: if the nominal diameter is 75, the force to prevent the pipe from detaching is greater than or equal to 40 kN; if the nominal diameter is 100, the force to prevent the pipe from detaching For 77 kN or more, if the nominal diameter is 150, the force to prevent the fitting from coming off is 160 kN or more, the above three are equivalent to type 1, and the joint strength is classified as equal to or higher than the fitting strength. In this embodiment, the forces that ensure that the tube is prevented from disengaging are even greater than these forces. In addition, high performance polyethylene pipes are generally not used as exposed pipes, but as buried pipes. Therefore, the pipe fittings will not be bent or deformed due to the general use pressure (0.75MPa) or the hydraulic leak test (0.5MPa) after construction.

[connector body 2]

As shown in FIGS. 1 to 3 , the joint body 2 has a tapered socket portion 21 and a cavity 22 for positioning the end portion of the joint pipe 100 , and is provided with a slightly rectangular flange 23 on the outer periphery. Through holes 24 are formed at the four corners of the flange 23 , and the through holes 24 are through holes 24 through which the first through-members 51 to be described later pass therethrough.

[Stop ring 3A]

The stop ring 3A, as shown in FIGS. 1 to 3 and 4A, has a slightly ring body 30A; a pair of protruding pieces 31, 31 provided at both circumferential end portions 30x, 30x of the ring body 30A; and a plurality of The stop ring connecting portions 32 are arranged at appropriate intervals along the circumferential direction of the ring body 30A. The protrusion 31 has a through hole 31 a for penetrating the bolt 9 a of the fastening device 9 . The cap nut 9b is screwed with the bolt 9a.

In this embodiment, the stop ring connecting portion 32 is composed of a first stop ring connecting portion 32 a adjacent to the protruding piece 31 and a second stop ring connecting portion 32 a further away from the protruding piece 31 than the first stop ring connecting portion 32 a. Two snap ring connecting portions 32b are formed, and a pair is provided in a line-symmetric manner with respect to the center axis L connecting the snap ring 3A with the central axis C and the circumferential center portion 30y.

The first and second stop ring connecting portions 32a and 32b are provided with long holes 33a and 33b as the stop ring penetration portions 33 penetrating the second penetration member 52 described later. As shown in FIG. 1 , the longitudinal direction D1 of the long hole 33a of the first stop ring connecting portion 32a (the center line d1 of the long hole 33a ) faces the protruding piece 31 and intersects the center line L. On the other hand, the longitudinal direction D2 of the long hole 33b of the second stop ring connecting portion 32b (the center line d2 of the long hole 33b) is parallel to the center line L. As shown in FIG.

The ring body 30A is line-symmetric with respect to the center line L, and is provided on the outer surface with a first rib 37 and a second rib 38 protruding outward. The first rib portion 37 is provided between the first snap ring connecting portion 32a and the second snap ring connecting portion 32b, and gradually becomes thinner from the first snap ring connecting portion 32a toward the second snap ring connecting portion 32b ( becomes low). The second rib portion 38 is provided between the pair of second stop ring connecting portions 32b, 32b, and is formed to have the same wall thickness (height). The first rib portion 37 and the second rib portion 38 enable the diameter reduction of the ring body 30A by the fastening device 9 to reduce the diameter substantially uniformly in the circumferential direction. Further, on the inner peripheral surface of the ring body 30A, a plurality of tooth portions 39 are formed in the circumferential direction, and the plurality of tooth portions 39 engage the joint pipe 100 by reducing the diameter of the fastening device 9 of the ring body 30A.

[Press ring 4A]

As shown in FIGS. 1 to 3 , the pressure ring 4A has: a main body portion 40 which is ring-shaped; The first and second pressure ring connection parts 42a and 42b of the movable ring connection part 32b. A circular press ring through hole 43 through which the first penetration member 51 penetrates is provided in the center of the first and second press ring connecting portions 42a and 42b. In addition, the first and second pressing ring connecting portions 42a, 42b have the same shape and are arranged at equal intervals of about 90° so as to be rotationally symmetrical with respect to the center of the pressing ring 4A. As a result, for example, when the pipe fixing device 1 is disassembled and reassembled, the connection device 5 can be used for connection and fixation regardless of which pressure ring connection part 42 is located with respect to the stop ring connection part 32 , so the workability is good. In addition, the longitudinal direction D1 of the long hole 33a is a straight line that connects the position of the pressure ring through hole 43 of the first pressure ring connection portion 42a with respect to the ring body 30A before and after the stop ring 3A is fastened. Further, the longitudinal direction D2 of the long hole 33b is a straight line that connects the position of the pressure ring through hole 43 of the second pressure ring connection portion 42b with respect to the ring body 30A before and after the stop ring 3A is fastened.

[Connection device 5]

As shown in FIGS. 1 to 3 and 4B, the connecting device 5 has: a first through member 51, which substantially penetrates through the through hole 24 of the joint body 2 and the pressure ring through hole 43; and a second through member 52, which includes: The connecting portion 53 penetrates the stop ring through portion 33 (long holes 33a, 33b) and is connected to the first through member 51; and the opposite portion 54 faces the stop ring connecting portion 32 (the first, second Two snap ring connecting parts 32a, 32b).

In this embodiment, the first through member 51 is a T-bolt, and the second through member 52 is attached with a flange cap nut. In this flanged cap nut 52, the connecting portion 53 is a cylindrical portion in which a threaded groove 53a is engraved. The opposing portion 54 is an annular flange portion protruding outward from the cylindrical portion 53 . In addition, the connection device 5 further includes a washer 55 as a contact member, which penetrates through the T-bolt 51 and is in contact with the cylindrical portion 53 and the pressure ring connection portion 42 .

In this pipe fitting device 1A, before tightening the ring body 30A (reducing the diameter of the stop ring 3A), the pressing ring 4A is fixed to the joint body 2 by the connecting device 5 (as shown in FIG. 5C ). At this time, the center of the T-bolt 51 and the through-hole 43 of the pressure ring may be misaligned. By placing the washer 55 between the cylindrical portion 53 and the pressing ring connecting portion 42, the end portion 53b of the cylindrical portion 53 is directly in contact with the contact area ratio of the flanged cap nut 52 relative to the pressing ring connecting portion 42. The contact area of the pressing ring connecting portion 42 is wide (large). In addition, since the flanged cap nut 52 is screwed into the T-bolt 51 , the surface of the pressing ring connecting portion 42 is not damaged by the rotation of the cylindrical portion 53 . Also, the washer 55 is only compressed and does not rotate with the flanged cap nut 52 . Therefore, even if the flanged cap nut 52 comes into contact with the retainer ring penetration portion 33 when the stop ring 3A is tightened, the flanged cap nut 52 to which the T-bolt 51 is screwed can slide smoothly by the washer 55 . , and does not interfere with the diameter reduction of the stop ring 3A. In addition, it is not necessary to manufacture the flanged cap nut 52 (cylindrical portion 53 ) according to the thickness (width in the pipe axis direction) of the snap ring connecting portion 32 and the gap between the snap ring connecting portion 32 and the flange portion 54 can be adjusted gap (interval B).

[Tilt mechanism 7]

In this embodiment, when the first and second pressing ring connecting portions 32a, 32b and the flange portion 54 are in contact with each other in the state where the diameter of the ring body 30A is reduced by the tightening device 9, the stopper ring 7 stops. 3A is inclined in the pipe axis direction X with respect to a reference plane orthogonal to the central axis C of the ring body 30A so that the circumferential end portion 30x of the ring body 30A is brought close to the joint body 2 and the circumferential center portion 30y is separated from the joint body. 2 separation. In other words, in the present invention, the stop ring 3A includes the center axis C of the ring body 30A and is inclined toward the horizontal plane N orthogonal to the center line L connecting the center O of the ring body 30A and the center portion 30y in the circumferential direction. As mentioned above, since the high-performance polyethylene pipe fittings are buried in the pipe, no bending or deformation will occur during the normal service pressure or hydraulic leak test. That is, under normal conditions of use, the tilting mechanism 7 will act when a large pulling force is generated in the pipe.

As shown in FIGS. 2 and 5B , each of the first surfaces 56 of the flange portion 54 facing the stop ring connecting portions 32a, 32b is parallel to the reference plane P (the facing plane Q indicated by the dashed-dotted line in FIG. 5B ) ). On the other hand, the second surfaces 34a, 34b of the first and second snap ring connecting portions 32a, 32b facing the flange portion 54 are located on the same inclined surface inclined at the inclination angle θ in the pipe axis direction X with respect to the reference plane P in PI. The tilt mechanism 7 includes the second surfaces 34 a and 34 b (inclined surface P1 ) of the snap ring connecting portion 32 (first and second snap ring connecting portions 32 a and 32 b ) and the first surface of the flange portion (opposing portion) 54 . The distance B between the surface 56 and the inclined surface PI increases from the circumferential end portion 30x toward the circumferential center portion 30y. Additionally, in FIG. 5B , each of the first surfaces 56 is located in the same opposing plane Q. However, in the state where the stopper ring 3A is fastened, a gap is formed between the first surface 56 and the inclined surface PI so that the interval B increases from the circumferential end portion 30x toward the circumferential center portion 30y.

Incidentally, it is also conceivable that the stop ring 3A is inclined in the pipe axis direction X with respect to the reference plane P so that the circumferential center portion 30y of the ring body 30A is brought close to the joint body 2, and the circumferential end portions 30x are separated from the joint body. 2 separation, however, in the high-performance polyethylene pipe (SDR11 PE100), when the ring body 30A is reduced in diameter, since the tooth portion 39 of the stop ring 3A is closer to the circumferential direction end portion 30x side than the circumferential direction central portion 30y Since the joint pipe 100 is engaged, the pipe-part detachment prevention performance which is larger on the circumferential direction end portion 30x side than the circumferential direction center portion 30y is exhibited. When the pipe pulling force F acts on the pipe, the inclination of the stop ring 3A causes the center portion 30y of the ring body 30A on the joint body 2 side in the circumferential direction to bite into the joint pipe 100, so the teeth 39 are located at the center portion in the circumferential direction. The amount of bite at 30y is reduced (tooth lifts up). Then, when the pipe pulling force F further acts, the joint pipe 100 will be displaced on the side of the center portion 30y in the circumferential direction with respect to the stop ring 3A. Therefore, compared with the present embodiment, the effect of improving the pipe detachment preventing force is reduced due to the inclination of the stopper ring 3A. As described above, in the tilt mechanism 7 of the present invention, the circumferential end portion 30x of the ring body 30A is brought close to the joint body 2, and the circumferential center portion 30y is separated from the joint body 2.

Here, the inclination angle θ of the inclined plane PI may be inclined with respect to the reference plane P at an angle greater than 0° and less than or equal to 5°. Preferably it is 1° or more and 5° or less. As the inclination angle increases, since the space allowed for inclination also increases, it is necessary to reduce the expansion and contraction amount of the joint tube 100 . If the joint tube 100 (nominal diameter 150) in this embodiment is used, it is preferably 2° or more and 3° or less. If the inclination angle exceeds 5°, it is difficult to secure the expansion and contraction amount of the joint pipe 100 in the joint, and the joint pipe 100 is detached from the gasket 6 to cause water leakage. In addition, in order to secure this inclination angle, it is necessary to extend the cylindrical portion 53 of the flanged cap nut 52, which increases the manufacturing cost.

According to the tensile experiment of the inventor's high-performance polyethylene pipe (PE100) with a nominal diameter of 150, when the inclination angle is 0°, the maximum load is 171.9 kN. When the tilt angle is 2°, the maximum load is 177.2kN, and when the tilt angle is 3°, the maximum load is 184.4kN. On the other hand, in the conventional product in which the pressing ring 4A is temporarily fixed and then the stop ring 3A is fastened, the maximum load is 171.8 kN.

Here, as described above, those classified as Category 1 in the British Water Pipe Industry Standard are those with a nominal diameter of 150 and a pipe detachment preventing force of 160 kN or more. Based on this criterion, the conventional product in the above experiment is 171.8-160=11.8kN. On the other hand, in the present invention, 184.4-160=24.4kN, which ensures the force against disengagement of the pipe, and the remaining amount is twice that of the conventional product. As described above, compared with the conventional product, especially when the inclination angle is 2° to 3°, the stroke capable of extending and retracting can be ensured, and the pipe detachment preventing force can be improved.

[Explanation of pipe tension]

Next, actions of the stop ring 3A and the joint pipe 100 in the pipe fixing device 1A will be described with reference to FIGS. 5 to 7 . 1 to 3 show a pipe fixing device 1A having an Open Nut 9c mounted on a pair of protrusions 31 , 31 . Since this state is before tightening the stop ring 3A (before reducing the diameter) and before tightening the connecting device 5 (before tightening the screw groove 53a), the joint body 2 and the pressing ring 4A do not contact each other, and the gasket 6 does not come into contact with each other. deformed.

Next, as shown in FIG. 5, the opening nut 9c is removed, the flanged cap nut 52 is tightened (finally tightened) to the T-bolt 51, and the stop ring 3A and the pressure ring 4A are attached to the joint body 2 (Tightening in the thread groove 53a is completed). The end 53b of the cylindrical portion 53 is in contact with the gasket 55 , and the press ring 4A presses the gasket 6 against the socket portion 21 , compresses and deforms the socket portion 21 , and also abuts against the joint body 2 . On the other hand, the stop ring 3A is not yet fastened. At this time, the center axis of each connecting device 5 located at one end of the long holes 33a, 33b of the stop ring 3A and the center of each pressing ring through hole 43 of the first and second pressing ring connecting portions 42a, 42b coincide with each other . In addition, the center of the stopper ring 3A also coincides with the center of the pressure ring 4A. Here, the maximum width (length) W1 of the snap ring connecting portion 32 in the pipe axis direction is shorter than the length W2 of the cylindrical portion of the cylindrical portion 55 (the distance from the flange portion 54 to the cylindrical portion end portion 53b). As a result, a gap S is formed between the flange portion 54 and the first and second pressure ring connecting portions 42a and 42b with respect to the first and second snap ring connecting portions 32a and 32b. Therefore, it is not necessary to manually fasten (tighten) the connecting device 5 to temporarily fix the pipe before fastening the fastening device 9 of the stop ring 3A as conventionally, and the pressing ring 4A can be securely fastened ( final tightening), and the work is simplified and the workability (workability) is good.

Next, as shown in FIG. 2 , after pressing the ring 4A to the joint body 2 using the connecting device 5 , the fastening device 9 of the stop ring 3A is fastened to reduce the diameter of the ring body 30A. Since the outer diameter of the cylindrical portion 53 is smaller than the diameter (width) of the long holes 33a and 33b in the short-side direction, the flanged cap nut 52 faces each other along the long-side directions D1 and D2 inside the long holes 33a and 33b. Move (slide) at 30A. Therefore, the diameter reduction of the ring body 30A is guided along the orientation directions of the long holes 33a, 33b (long-side directions D1, D2), and the first and second stop ring connecting portions 32a, 32b follow the diameter reduction of the ring body 30A. move. Then, the center axis of each connecting device 5 moving from one end to the other end of the long holes 33a, 33b coincides with the center of each pressing ring through hole 43 of the first and second pressing ring connecting parts 42a, 42b. In addition, the center of the stop ring 3A and the center of the pressure ring 4A, which are reduced in diameter by tightening, also overlap each other. Therefore, the connecting device 5 does not interfere with the diameter reduction, and the ring body 30A is not partially loaded to cause cracks or the like.

In addition, due to the above-mentioned gap S, when the diameter of the ring body 30A is reduced, the stop ring connecting portion 32 and the pressing ring connecting portion 42 do not come into contact with each other, and frictional resistance due to the contact does not occur. Therefore, the diameter can be reduced smoothly with low torque and the workability is good. Further, since the stop ring 3A is not fixed to the joint body 2, and the first stop ring connection portion 32a and the second stop ring connection portion 32b are separated from the flange portion 54, the joint pipe 100 can be expanded and contracted.

Then, when the pipe tension force F is generated in the joint pipe 100 in the pipe axial direction X after the fixed stop ring 3A is attached, the joint pipe 100 is extended, and the stop ring 3A is separated from the pressure ring 4A (washer 55 ) . Since the outer diameter of the flange portion 54 is larger than the diameters of the long holes 33a, 33b, the flange portion 54 contacts the first and second snap ring connecting portions 32a and 32b, thereby preventing the coupling tube 100 from falling off. In this embodiment, first, the upper end 56a of the first surface 56 of the flange portion 54 (the side of the circumferential end portion 30x) is brought into contact with the first stop ring connecting portion 32a.

Here, in this embodiment, the space (interval B) formed between the flanged cap nut 52 and the first surface 56 of the flange portion 54 is the second surface of the second snap ring connecting portion 32b 34b is larger than the second surface 34a of the first stop ring connecting portion 32a, and the lower portion (circumferential direction central portion 30y) is larger than the upper portion (circumferential direction end portion 30x side). As described above, between the first surface 56 of the flange portion 54 and the inclined surface PI including the second surfaces 34a and 34b, the interval B increases from the circumferential end portion 30x to the circumferential center portion 30y due to the formation of the interval B. Therefore, when the pipe pulling force F is further applied, as shown in FIG. 7, the stop ring 3A is inclined from the upper end 56a, so that the space B (space) and the inclined plane PI (the second surface 34a, 34b) make the The circumferential direction end portion 30x is close to the joint body 2 , and the circumferential direction central portion 30y is separated from the joint body 2 . Then, the ring body 30A comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . The resulting deformed portion M counteracts the pulling force F of the pipe, and can greatly increase the force for preventing the pipe from being detached.

In addition, the tooth portion 39 of the stop ring 3A is more deeply engaged with the joint pipe 100 on the side of the circumferential end portion 30x where the fastening device 9 is located than in the vicinity of the circumferential central portion 30y, and is engaged with the joint pipe 100 at the circumferential central portion 30y. Nearby bite becomes shallow. When the pipe pulling force F is generated in the stop ring 3A, since the teeth 39 engage shallowly in the vicinity of the circumferential center portion 30y, the engaging pipe 100 slides there and reduces the force preventing the pipe from coming off. Therefore, by inclining the stopper ring 3A from the upper end 56a side, the stopper ring 3A can be inclined relatively easily to generate the deformed portion M in the joint pipe 100, thereby further enhancing the force for preventing the pipe from coming off. In addition, due to the inclination of the stop ring 3A, the tooth portion 39 of the central portion 30y in the circumferential direction is further engaged with the engaging pipe 100, thereby further increasing the force for preventing the pipe from coming off.

In addition, it is also conceivable to make the second surfaces 34a and 34b of the stop ring connecting portion 32 flat surfaces and the first surface 56 of the flange portion 54 to be inclined surfaces, and in the same manner as described above, make the stop ring 3A is inclined to deform the joint tube 100 . However, in this case, it is difficult to tighten the T-bolt 51 and the flanged cap nut 52 so that the first surface 56 of each flange portion 54 is located in the same inclined plane PI. Therefore, in the tilt mechanism 7 of the present invention, the first surface 56 of the flange portion 54 is a flat surface, and the second surface 34 of the stop ring connecting portion 32 is an inclined surface.

<Second Embodiment>

Next, a second embodiment of the present invention will be explained with reference to FIGS. 8 to 12 . In addition, the same components as those of the above-described embodiment are denoted by the same reference numerals. In the above-mentioned embodiment, the four snap ring connecting portions 32 (the first and second snap ring connecting portions 32 a and 32 a ) are connected to the joint body 2 by the connecting device 5 . However, in the second embodiment, the stopper ring 3B has the stopper ring connecting portion 32, a pair of first stopper ring connecting portions 32a, 32a, and one second stopper ring connecting portion 32b1. In this embodiment, the nominal diameter of the joint tube 100 is 100 mm. Reference numeral 37B refers to the first rib.

As shown in FIGS. 8 to 10 , the second stop ring connecting portion 32b1 is formed with a concave portion 33b1. In the second embodiment, the concave portion 33b1 is located at the center portion 30y in the circumferential direction of the ring body 30B, and has an opening on one side as the second embodiment. Two stop ring penetrations 33b. The recessed portion 33b1 is narrower than the flange portion 54 and is along the center line L. As shown in FIG. The second surfaces 34a, 34b of the flange portions 54 facing the first snap ring connecting portion 32a and the second snap ring connecting portion 32b1 are located at the same position inclined at the inclination angle θ in the pipe axis direction X with respect to the reference plane P. face PI. In addition, the inclination angle θ of the inclined plane PI may be inclined with respect to the reference plane P at an angle greater than 0° and less than or equal to 5°. Preferably it is 1° or more and 5° or less. Also in this embodiment, the space (interval B) formed between the flanged cap nut 52 and the first surface 56 of the flange portion 54 is larger than the second surface 34b of the second snap ring connecting portion 32b1 The second surface 34a of the first stop ring connecting portion 32a, and the lower portion (circumferential direction central portion 30y) is larger than the upper portion (circumferential direction end portion 30x side).

As shown in FIG. 11, also in this embodiment, the diameter of the ring body 30B can be reduced by using the connecting device 5 to fasten the pressure ring 4B to the joint body 2, and then fasten the fastening device 9 of the stop ring 3B. . In this embodiment, the flanged cap nut 52 will slide along the longitudinal direction D1 in the long hole 33a. On the other hand, in the circumferential center portion 30y, since the diameter is reduced toward the center of the ring body 30B and the amount of diameter reduction is small, the flanged cap nut 52 slightly slides along the center line L in the recessed portion 33b1. Therefore, the connecting device 5 does not interfere with the diameter reduction and does not come off from the recessed portion 33b1. Further, in place of the recessed portion 33b1 whose outer side is open, an elongated hole along the center line L may be used.

Further, when the pipe pulling force F is further applied, as shown in FIG. 12, the stop ring 3B is inclined from the upper end 56a due to the interval B (space) shown in FIG. 9 and the inclined planes PI (second surfaces 34a, 34b). Then, the ring body 30B comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . Since the deformed portion M generated counteracts the pipe pulling force F, and the teeth 39 at the center portion 30y in the circumferential direction are further engaged in the joint pipe 100, the force for preventing the pipe from being disengaged can be greatly increased.

<Third Embodiment>

In addition, in the third embodiment shown in FIGS. 13 to 17 , the stop ring 3C has only two stop ring connection parts 32 , that is, a pair of first stop ring connection parts 32a2 and 32a2 . In this embodiment, the nominal diameter of the joint tube 100 is 50 or 75 .

As shown in FIGS. 13 to 15 , the pair of first stop ring connecting portions 32a2, 32a2 are located in the middle portion between the circumferential direction central portion 30y and the circumferential direction end portion 30x of the ring body 30C, and with respect to the center line L by a line Symmetrical configuration. The first snap ring connecting portion 32a2 is formed with a concave portion 33a2, and in the third embodiment, the concave portion 33a2 serves as the first snap ring penetration portion 33a whose outer side is open. The recessed portion 33a2 is narrower than the flange portion 54 . In this embodiment, the second surface 34 of the first snap ring connecting portion 32a2 facing the flange portion 54 is located on the same inclined surface PI inclined at an inclination angle θ along the pipe axis direction X with respect to the reference plane P. The inclination angle θ of the inclined plane PI may be inclined with respect to the reference plane P at an angle greater than 0° and less than or equal to 10°. Preferably it is 1° or more and 6° or less. In this embodiment, the space (interval B) formed between the first surface 56 of the flange portion 54 of the flanged cap nut 52 and the second surface 34 of the first snap ring connecting portion 32a2 is the lower portion. (circumferential direction central portion 30y) is larger than in the upper portion (circumferential direction end portion 30x side).

As shown in FIG. 16, also in this embodiment, the diameter of the ring body 30C can be reduced by using the connecting device 5 to fasten the pressure ring 4C to the joint body 2, and then fasten the fastening device 9 of the stop ring 3C. . In the present embodiment, the flanged cap nut 52 slides along the center line L in the recess 33a2. Therefore, the connecting device 5 does not interfere with the diameter reduction and does not come off from the recessed portion 33a2. Further, instead of the recessed portion 33a2 whose outer side is open, a long hole along the center line L may be used. In addition, in this embodiment, the opening width of the recessed portion 33a2 is the same as the width of the inner portion of the recessed portion 33a2, but the opening width may be formed to be narrower than the inner width. The shape of the recessed portion 33a2 is not limited to the shape of the present embodiment, as long as the flanged cap nut 52 can slide in the recessed portion 33a2.

Further, when the pipe pulling force F is further applied, as shown in FIG. 17, the stop ring 3C is inclined from the upper end 56a due to the interval B (space) shown in FIG. 14 and the inclined plane PI (second surface 34a). Then, the ring body 30C comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . Since the deformed portion M generated counteracts the pipe pulling force F, and the teeth 39 at the center portion 30y in the circumferential direction are further engaged in the joint pipe 100, the force for preventing the pipe from being disengaged can be greatly increased.

<Fourth Embodiment>

In addition, in the fourth embodiment shown in FIGS. 18 to 22 , the stop ring connecting portion 32 of the stop ring 3D includes six connecting portions, which are: a pair of first stop ring connecting portions 32 a and 32 a respectively. , a pair of second stop ring connection parts 32b2, 32b2 and a pair of third stop ring connection parts 32c, 32c, each connection part is arranged in a pair to be symmetrical with respect to the center line L. In addition, in this embodiment, the nominal diameter of the joint tube 100 is 250 mm. Reference numerals 37D and 38D refer to the first rib and the second rib, respectively.

As shown in FIGS. 18 to 20 , the second stop ring connection portion 32b2 is located in the vicinity of the center portion 30y in the circumferential direction of the ring body 30D. In addition, the third snap ring connecting portion 32c is provided in the center between the first snap ring connecting portion 32a and the second snap ring connecting portion 32b2 (along the ring body 30D from the circumferential center portion 30y of the ring body 30D). 90° in the circumferential direction). The second snap ring connecting portion 32b2 and the third snap ring connecting portion 32c are provided with elongated holes 33b2 , 33c narrower than the flange portion 54 . The first stop ring connecting portion 32a has the same configuration as that of the above-described first embodiment.

Here, the longitudinal direction D1 (center line d1) of the long hole 33a of the first snap ring connecting portion 32a and the long side direction D3 (center line d3) of the long hole 33c of the third snap ring connecting portion 32c are directed toward The protrusions 31 are oriented and intersect the centerline L. In addition, the intersection angle α1 between the center line d1 and the center line L is larger than the intersection angle between the center line d3 and the center line L. On the other hand, the longitudinal direction D2 (center line d2 ) of the long hole 33b2 of the second snap ring connecting portion 32b2 is oriented toward the third snap ring connecting portion 32c, and the orientation direction is the same as that of the previous center lines d1, d3 In the opposite direction. In addition, since the center line d2 is slightly parallel to the center line L, the intersection angle of the center line L is much smaller than the intersection angle between the center line d3 and the center line L.

The second surfaces 34a, 34b, 34c of the flange portions 54 facing the first, second, and third snap ring connecting portions 32a, 32b2, 32c are positioned at an inclination angle θ relative to the reference plane P along the pipe axis direction X in the same inclined plane PI that is inclined. In addition, the inclination angle θ of the inclined plane PI may be inclined with respect to the reference plane P at an angle greater than 0° and less than or equal to 5°. Preferably it is 1° or more and 4° or less. Also in the present embodiment, the space (interval B) formed between each snap ring connecting portion (inclined surface PI) and the first surface 56 of the flange portion 54 is the same as that of the first snap ring connecting portion 32a. The second surface 34a, the second surface 34c of the third snap ring connecting portion 32c, and the second surface 34b of the second snap ring connecting portion 32b2 are sequentially enlarged, and the lower portion (circumferential direction central portion 30y) is larger than the upper portion (circumferential direction center portion 30y). end 30x side) large.

As shown in FIG. 21, also in this embodiment, the diameter of the ring body 30D can be reduced by using the connecting device 5 to fasten the pressure ring 4D to the joint body 2, and then fasten the fastening device 9 of the stop ring 3D. . In this embodiment, in the state where the stop ring 3D is not yet fastened, the central axis of each connecting device 5 located at one end of the long holes 33a, 33b2, 33c of the stop ring 3D is connected to the first, second, and first The centers of each of the pressure ring through holes 43 of the three pressure ring connection parts 42a, 42b, 42c coincide with each other. In addition, the center of the stopper ring 3D and the center of the pressure ring 4D also overlap. Then, when the stop ring 3D is tightened by the tightening device 9, the flanged cap nuts 52 slide in the respective longitudinal directions D1 to 3 in the long holes 33a, 33b2, 33c. Therefore, the diameter reduction of the ring body 30D is guided along the orientation directions of the long holes 33a, 33b2, 33c (long-side directions D1, D2, D3), and the respective stop ring connecting portions 32a, 32b2, 33c follow the reduction of the ring body 30D move along the path. Then, the central axis of each connecting device 5 moved from one end of the long holes 33a, 33b2, 33c to the other end and each pressing ring through hole of the first, second, and third pressing ring connecting parts 42a, 42b, 42c The centers of 43 coincide with each other. The center of the stop ring 3D and the center of the pressure ring 4D, which are reduced in diameter by tightening, also coincide with each other. Therefore, the connecting device 5 does not interfere with the diameter reduction, and the ring body 30D is not partially loaded to cause cracks or the like.

Further, when the pipe pulling force F is further applied, as shown in FIG. 22, the stop ring 3D is inclined from the upper end 56a due to the interval B (space) and the inclined plane PI (second surfaces 34a, 34b, 34c). Then, the ring body 30D comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . Since the deformed portion M generated counteracts the pipe pulling force F, and the teeth 39 at the center portion 30y in the circumferential direction are further engaged in the joint pipe 100, the force for preventing the pipe from being disengaged can be greatly increased.

<Fifth Embodiment>

In addition, in the fifth embodiment shown in FIGS. 23 to 27 , the stop ring connecting portion 32 of the stop ring 3E includes five connecting portions, which are a pair of first stop ring connecting portions 32 a and 32 a respectively. , a second snap ring connecting portion 32b3 and a pair of third snap ring connecting portions 32c1, 32c1 located at the center portion 30y in the circumferential direction of the ring body 30E, each connecting portion is arranged in pairs so as to be relative to the center line L Line symmetry. In addition, in this embodiment, the nominal diameter of the joint tube 100 is 250 or 300 . Reference numeral 37E refers to the first rib.

As shown in FIGS. 23 to 25 , the third snap ring connecting portion 32c1 is provided in the middle (center) between the first snap ring connecting portion 32a and the second snap ring connecting portion 32b3. The second snap ring connecting portion 32b3 and the third snap ring connecting portion 32c1 are provided with elongated holes 33b3 , 33c1 narrower than the flange portion 54 . Further, the first stop ring connecting portion 32a has the same configuration as that of the second embodiment described above.

Here, the longitudinal direction D1 (center line d1) of the long hole 33a of the first snap ring connecting portion 32a and the long side direction D3 (center line d3) of the long hole 33c1 of the third snap ring connecting portion 32c1 are directed toward The protrusions 31 are oriented and intersect the centerline L. In addition, the intersection angle α1 between the center line d1 and the center line L is larger than the intersection angle between the center line d3 and the center line L. On the other hand, the longitudinal direction D2 (center line d2 ) of the long hole 33b3 of the second stop ring connecting portion 32b3 overlaps the center line L. As shown in FIG.

The second surfaces 34a, 34b, 34c of the flange portions 54 facing the snap ring connecting portions 32a, 32b3, 32c1 are located in the same inclined plane PI inclined at the inclination angle θ in the pipe axis direction X with respect to the reference plane P. In addition, the inclination angle θ of the inclined plane PI may be inclined with respect to the reference plane P at an angle greater than 0° and less than or equal to 5°. Preferably it is 1° or more and 4° or less. Also in the present embodiment, the space (interval B) formed between each snap ring connecting portion (inclined surface PI) and the first surface 56 of the flange portion 54 is the same as that of the first snap ring connecting portion 32a. The second surface 34a, the second surface 34c of the third snap ring connecting portion 32c1, and the second surface 34b of the second snap ring connecting portion 32b3 are sequentially enlarged, and the lower portion (circumferential direction central portion 30y) is larger than the upper portion (circumferential direction center portion 30y). end 30x side) large.

As shown in FIG. 26, also in this embodiment, the diameter of the ring body 30E can be reduced by using the connecting device 5 to fasten the pressure ring 4E to the joint body 2, and then fasten the fastening device 9 of the stop ring 3E. . In this embodiment, when the stop ring 3E is not yet fastened, the central axis of each connecting device 5 located at one end of the long holes 33a, 33b3, 33c1 of the stop ring 3E is connected to the first, second, and first The centers of each of the pressure ring through holes 43 of the three pressure ring connection parts 42a, 42b, 42c coincide with each other. In addition, the center of the stopper ring 3E and the center of the pressure ring 4E also overlap. Then, when the stop ring 3E is tightened by the tightening device 9, the flanged cap nuts 52 slide in the respective longitudinal directions D1 to 3 in the long holes 33a, 33b3, 33c1. Therefore, the diameter reduction of the ring body 30E is guided along the orientation directions of the long holes 33a, 33b3, 33c1 (long-side directions D1, D2, D3), and the respective stop ring connecting portions 32a, 32b3, 32c1 follow the reduction of the ring body 30E. move along the path. Then, the central axis of each connecting device 5 moved from one end of the long holes 33a, 33b3, 33c1 to the other end and each pressing ring through hole of the first, second and third pressing ring connecting parts 42a, 42b, 42c The centers of 43 coincide with each other. In addition, the center of the stopper ring 3E and the center of the pressure ring 4E, which are reduced in diameter by tightening, also overlap each other. Therefore, the connecting device 5 does not interfere with the diameter reduction, and the ring body 30E is not partially loaded to cause cracks or the like.

Furthermore, when the pipe pulling force F is further applied, as shown in FIG. 27, the stop ring 3E is inclined from the upper end 56a due to the interval B (space) and the inclined plane PI (second surfaces 34a, 34b, 34c). Then, the ring body 30E comes into contact with the joint tube 100 and deforms (bends) the joint tube 100 . Since the deformed portion M generated counteracts the pipe pulling force F, and the teeth 39 at the center portion 30y in the circumferential direction are further engaged in the joint pipe 100, the force for preventing the pipe from being disengaged can be greatly increased.

<Other Examples>

Finally, the possibility of another embodiment of the invention will be explained.

In each of the above-described embodiments, a high-performance polyethylene pipe (SDR11 PE100) has been described as an example of the joint pipe 100 . High-performance polyethylene pipes include SDR13.6, SDR17 and SDR21 in addition to SDR11, depending on the relationship between the outer diameter and wall thickness of the pipe fittings, and can be applied to such high-performance polyethylene pipes. In addition, it can also be applied to cross-linked polyethylene pipes, polypropylene pipes, and the like for hot water pipes.

In the third embodiment, a third stop ring connection portion 32c is provided between the first stop ring connection portion 32a and the second stop ring connection portion 32b, and these are arranged in pairs so as to be aligned with the center line L. Line symmetry. However, the present invention is not limited to this, and plural pairs of the third stop ring connecting portions 32c may be provided. For example, a first through-member (T-bolt) 51 and a second through-member (flanged cap nut) 52 may be used, eg, eight or ten, to be line-symmetrical to the centerline L, and corresponding to having a larger diameter of the joint tube.

In the second embodiment, a pair of first snap ring connecting portions 32a, 32a and a second snap ring connecting portion 32b1 are provided. However, the present invention is not limited to this, and plural pairs of the third stop ring connecting portions 32c may be provided. For example, a first penetrating member (T-bolt) 51 and a second penetrating member (flanged cap nut) 52, such as five or seven, may be used to be line-symmetrical to the centerline L, and corresponding to having a higher Large diameter joint tube.

Although the inner core is omitted in each of the above-described embodiments, the present invention can be applied even when the inner core is used. Although the inner core prevents the diameter reduction of the joint tube 100, according to the inventor's experiment, it can be confirmed that the stop ring 3 will be tilted by the tilting mechanism 7 when the tensile force of the tube increases, and the joint tube 100 and the joint body 2 are maintained in a coaxial manner. . That is, the present invention can be used (shared) regardless of whether an inner core is used, and the versatility is extremely high.

The above-mentioned examples are only some embodiments of the present invention, and are not intended to limit the present invention. According to the creative spirit and characteristics of the present invention, those made with slight changes and modifications should also be included in the scope of this patent.

To sum up, the embodiment of the present invention can indeed achieve the expected use effect, and the specific technical means disclosed by it have not only not been seen in similar products, but also have not been disclosed before the application, which fully complies with the patent law. According to the regulations and requirements, it is really grateful to file an application for an invention patent in accordance with the law, and ask for the review and approval of the patent.

1A～E: Pipe fitting fixing device

2: Connector body

3, 3A, 3B, 3C, 3D, 3E: Stop ring

4A, 4B, 4C, 4D, 4E: Compression ring

5: Connection device

6: padding

7: Tilt mechanism

9: Fastening device

9a: Bolts

9b: cap nut

9c: opening nut

21: Socket

22: Cavity

23: Flange

24: Through hole

30A, 30B, 30C, 30D, 30E: Ring

30x: Circumferential end

30y: Central part in the circumferential direction

31: Protruding Pieces

31a: Through hole

32: Stop ring connection part

32a: first stop ring connection part

32a2: first stop ring connection part

32b, 32b1, 32b2, 32b3: the second stop ring connection part

32c, 32c1: Third stop ring connection part

33: Stop ring penetration

33a: First stop ring penetration part (long hole)

33a2: Recess

33b: Second stop ring penetration part (long hole)

33b1: Recess

33b2, 33b3: long hole

33c: Third stop ring penetration part (long hole)

33c1: long hole

34, 34a, 34b, 34c: second surface

37: First rib

38: Second Rib

39: Teeth

40: Main body

42: Compression ring connection

42a: the first pressure ring connecting part

42b: the second pressure ring connecting part

42c: The third pressure ring connection part

43: Through hole of pressure ring

51: The first through member (T-bolt)

52: Second through member (with flange cap nut)

53: Connection part (cylindrical part)

53a: Thread groove

53b: end

54: Opposing part (flange part)

55: Contact member (washer)

56: First Surface

56a: upper end

100: Jointed Tube

X: the direction of the tube axis

B: Interval

C: Center axis

D1, D2, D3: Long side direction

d1, d2, d3: center line

L: center line

P: Datum plane

PI: inclined plane

Q: Opposite

W1: Maximum width (length) in the pipe axis direction

W2: Length of cylindrical part

θ: tilt angle

37B, 37D, 37E: First rib

N: horizontal plane

38D: Second rib

3': Stop Ring

32': snap ring connection

5': Connection device

54': Flange

1 is a front view of a pipe fitting fixing device of a pipe joint according to a first embodiment of the present invention.

FIG. 2 is a side view of FIG. 1 .

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1 .

4A is a perspective view of the retaining ring of the first embodiment.

4B is a perspective view of the flanged cap nut according to the first embodiment.

FIG. 5A is a view corresponding to FIG. 1 , showing the state after tightening the connecting means and before tightening the fastening means of the stop ring.

Figure 5B is a side view of Figure 5A.

FIG. 5C is a cross-sectional view taken along line B-B of FIG. 5A .

FIG. 6A is a view corresponding to FIG. 1 , showing the state after tightening the connecting means and after tightening the fastening means of the stop ring.

FIG. 6B is a cross-sectional view taken along line C-C of FIG. 6A .

Fig. 7 is a view corresponding to Fig. 2, showing a state in which a pipe tension is applied to the joint pipe and the stop ring is inclined.

8 is a front view of a pipe fixing device according to a second embodiment of the present invention.

FIG. 9 is a side view of FIG. 8 .

FIG. 10 is a perspective view of the retaining ring of the second embodiment.

FIG. 11 is a diagram corresponding to FIG. 6A in the second embodiment.

FIG. 12 is a diagram corresponding to FIG. 7 in the second embodiment.

13 is a front view of a pipe fixing device according to a third embodiment of the present invention.

FIG. 14 is a side view of FIG. 13 .

15 is a perspective view of a stop ring according to a third embodiment.

FIG. 16 is a diagram corresponding to FIG. 6A in the third embodiment.

FIG. 17 is a diagram corresponding to FIG. 7 in the third embodiment.

18 is a front view of a pipe fixing device according to a fourth embodiment of the present invention.

FIG. 19 is a side view of FIG. 18 .

20 is a perspective view of a stop ring according to a fourth embodiment.

FIG. 21 is a diagram corresponding to FIG. 6A in the fourth embodiment.

FIG. 22 is a diagram corresponding to FIG. 7 in the fourth embodiment.

Fig. 23 is a front view of the pipe fixing device according to the fifth embodiment of the present invention.

FIG. 24 is a side view of FIG. 23 .

25 is a perspective view of a stop ring according to a fifth embodiment.

FIG. 26 is a diagram corresponding to FIG. 6A in the fifth embodiment.

FIG. 27 is a diagram corresponding to FIG. 7 in the fifth embodiment.

Fig. 28 is a side view showing a conventional pipe fixing device.

3A: Stop ring

56a: upper end

54: Opposing part (flange part)

5: Connection device

52: Second through member (with flange cap nut)

56: First Surface

34a: Second surface

7: Tilt mechanism

30A: Ring body

PI: inclined plane

Q: Opposite

B: Interval

56: First Surface

34b: Second surface

31: Protruding Pieces

30x: Circumferential end

9a: Bolts

32a: first stop ring connection part

32: Stop ring connection part

53: Connection part (cylindrical part)

23: Flange

51: The first through member (T-bolt)

2: Connector body

42a: the first pressure ring connecting part

55: Contact member (washer)

40: Main body

4A: pressure ring

42b: the second pressure ring connecting part

55: Contact member (washer)

Claims (11)

A pipe fitting fixing device for a pipe joint is provided with: a stop ring, which reduces the diameter of a C-shaped annular ring body by a tightening device, and is fastened on the outer peripheral surface of a joint pipe; a pressing ring presses a gasket on on the socket part of the joint body; and a connecting device for connecting and fixing the stop ring and the pressing ring to the joint body, wherein the stop ring has: a pair of protruding pieces arranged on two circumferences of the ring body a direction end portion, and has a through hole penetrating the fastening device; a tooth portion is arranged on the inner side of the ring body, and is engaged in the joint pipe by reducing the diameter of the fastening device; and a plurality of stop ring connecting parts, The ring body is arranged at appropriate intervals along the circumferential direction of the ring body and has a stop ring through portion passing through the connecting device, the pressure ring has a plurality of pressure ring connection parts, and the plurality of pressure ring connection parts have pressure ring through holes, the The pressure ring through hole faces the plurality of stop ring connection parts in the pipe axis direction, and passes through the connection device. The connection device has: a first through member, a through hole through the joint body and the pressure ring through hole ; and a second through member, which is provided with: a connecting portion that penetrates through the stop ring through portion and is connected to the first through member; and an opposing portion that faces the stop ring connecting portion along the pipe axis direction, In a state in which the ring body is reduced in diameter by the tightening device, there is provided a tilting mechanism that tilts the stop ring with respect to the ring when the stop ring connecting portion and the opposing portion come into contact with each other. A reference plane orthogonal to the central axis of the body is inclined in the direction of the pipe axis so that the circumferential end portion of the ring body is brought close to the joint body and the circumferential center portion of the ring body is separated from the joint body. The first surface opposite to the stop ring connecting part is parallel to the reference plane, and the second surfaces of the plurality of stop ring connecting parts and the opposite part are respectively located on the pipe axis relative to the reference surface. For the same inclined surface inclined in the direction, the distance between the first surface and the inclined surface increases from the end portion in the circumferential direction to the central portion in the circumferential direction. The pipe fitting fixing device for a pipe joint as claimed in claim 1, wherein the plurality of snap ring connecting portions have: a pair of first snap ring connecting portions adjacent to the pair of protruding pieces; and a pair of second snap ring connecting portions The stop ring connecting parts are adjacent to the pair of first stop ring connecting parts, and the pair of first stop ring connecting parts and the pair of second stop ring connecting parts are relatively connected to the central shaft and the The center line of the central part in the circumferential direction is arranged in a line-symmetrical manner, and the first stop ring penetration part of the first stop ring connecting part is a long hole, and the long hole means that the connecting part can slide along the circumferential direction of the ring body and The width is narrower than that of the opposite portion, and the second stop ring through portion of the second stop ring connecting portion is a long hole, and the long hole means that the connecting portion can slide along the direction of the center line and has a wider width than the opposite portion. narrow. The pipe fitting fixing device for a pipe joint as claimed in claim 1, wherein the plurality of stop ring connecting parts have: a pair of first stop ring connecting parts adjacent to the pair of protruding pieces; and a second stop a ring connecting portion located in the circumferential center portion, the pair of first stop ring connecting portions are arranged line-symmetrically with respect to a center line connecting the central axis and the circumferential center portion, the first snap ring connecting portions The through part of the first stop ring is a long hole, the long hole is that the connecting part can slide along the circumferential direction of the ring body and the width is narrower than the opposite part, the second stop of the connecting part of the second stop ring The ring through part is a concave part or a hole with an opening on one side, the concave part or the hole is that the connecting part can slide along the direction of the center line and the width is narrower than the opposite part. The pipe fitting fixing device for a pipe joint as claimed in claim 1, wherein the plurality of stop ring connecting portions are stopped by a pair of stoppers located between the circumferential central portion and the circumferential end portion of the ring body It consists of ring connection parts, the pair of stop ring connection parts are arranged in a line-symmetrical manner with respect to the center line connecting the central axis and the circumferential center part, and the stop ring through part of the stop ring connection part is an elongated hole or One side is an open concave part, the long hole or concave part is slidable by the connecting part and the width is narrower than the opposite part. The pipe fitting fixing device for a pipe joint according to claim 1, wherein the plurality of snap ring connecting portions are provided with: a pair of first snap ring connecting portions adjacent to the pair of protruding pieces; and the circumferential direction a pair of second stop ring connection parts adjacent to the central part; a pair of third stop ring connection parts located between the first stop ring connection part and the second stop ring connection part, The pair of first snap ring connecting portions, the pair of second snap ring connecting portions, and the pair of third snap ring connecting portions are line-symmetrical with respect to a center line connecting the central axis and the circumferential center portion The stop ring through part of each stop ring connecting part is a long hole, and the long hole means that the connecting part can slide along the circumferential direction of the ring body and has a narrower width than the opposite part. The pipe fitting fixing device for a pipe joint as claimed in claim 3, wherein the plurality of stop ring connecting parts are further provided with a pair of third stop ring connecting parts, which are located at the first stop ring connecting part and the second stop ring connecting part. Between the movable ring connection parts, the pair of third stop ring connection parts are arranged in a line-symmetrical manner with respect to the center line connecting the central axis and the circumferential center part, and the third stop ring connection part The through portion of the stop ring is an elongated hole, and the elongated hole means that the connecting portion can slide along the circumferential direction of the ring body and is narrower in width than the opposite portion. The pipe fitting fixing device for a pipe joint according to any one of claims 2, 3, 5 or 6, wherein the joint pipe is a high-performance polyethylene pipe with a nominal diameter of 100 or more. The pipe fitting fixing device for a pipe joint according to claim 4, wherein the joint pipe is a high-performance polyethylene pipe with a nominal diameter of 75 or more. The pipe fitting fixing device for a pipe joint according to any one of claims 1 to 6 or 8, wherein the first through member is a T-bolt, and the second through member is a cap nut with a flange. The pipe fitting fixing device for a pipe joint according to claim 9, wherein the connecting device is further provided with a contact member, and the first through member penetrates and contacts the connecting portion and the pressing ring connecting portion. The pipe fitting fixing device for a pipe joint according to any one of claims 1 to 6 or 8, wherein the inclined surface is a surface inclined within 5° and greater than 0° relative to the reference plane in the pipe axis direction.

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