JPS5839891A - Pipe joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe joint consisting of a housing and a sleeve for connecting pipe abutting portions of various fluid transfer pipes.

Hitherto, for pipe-to-pipe connection, a rough pipe joint has been proposed.
No. 4!11354, No. 2i508918, British Patent No. 880,204, West German Patent No. 722451361, etc. are introduced.

Of course, the pipe joints introduced in these publications have many advantages, but there are some aspects that are not necessarily satisfactory with this proposal.

In other words, in order to achieve a complete sealing effect, it is necessary to take some measures to ensure that there is always sufficient pressure, and
Even if this is not the case, since the gasket web connects all the seams, severe shearing forces are always applied at some point, so the material of the gasket must be carefully selected.

The present invention alleviates the above-mentioned drawbacks and provides a pipe joint that maintains a pipe-to-pipe connection in a water-tight and oil-tight manner. IRW! It consists of a housing that can be tightened, and a sealing sleeve with a 0-shaped cross section, which has @-shaped edges provided in a folded manner on both edges and is supported by a Sakaki-zumi die. The pipe joint is made by integrating the

Next, embodiments of the present invention will be described based on the drawings.

In the pipe joint shown in FIG.
The body 12 of the collar is substantially cylindrical in shape and the housing 11 has a clamping collar l115.16.
The two fasteners with the retracted free end edges bent by the bra nuts) 13.14 are welded,
For tightening, the zelkovas are connected by eight bolts 17. Therefore, the inner diameter of the entire housing 11 can be reduced by tightening the two bolts. By doing so, the width of the bridging line gap 12 is almost reduced to zero by the thin sheet metal plate inserted between the sleeve and the housing, although not particularly shown here. Housing 11 by use of housing body 18 and inwardly bent ends 19 and 20
is the sealing gasket, i.e. the backing sleeve 2
1 is stored inside it. In this eleventh example, the backing sleeve is made of integral synthetic rubber. The gasket is round-shaped in cross section and has inwardly facing sealing lips 23 and 24 at each end of the gasket F web 8z, extending from the ends towards the center of the web. In FIG. 1, the two tubes to be connected, namely 25 and 26, are located away from the root of their 4# edge 23.24. It extends toward the free end of the minimum thickness, and has a bow-like shape.

Therefore, when the tubes 25 and 26 are inserted into the pipe fitting, the sleeve 21 is sealed from the outside. ! A compartment 27 is formed inside the sections 5 and 26 via a joint 28. - the sleeve 21 has its web 2
It is pressed flat against the inner surface of the housing body 18 by the rear side of the web and by the ends of the web against the respective anchor ring of laminar construction. The anchor ring is clearly shown in Figure 3.
It has the shape of a truncated cone, with a single fluffed cylindrical cross section at the larger diameter part, and as already mentioned, it extends in the radial direction from the smaller diameter part of the anchor ring. It is made into a CNI plate by providing grooves that allow it to pass through.

The sheets formed in this way have the shape of a truncated cone since they are folded over each other. The sealing edges 23 and 24 are pressed tightly against the outside diameter of the tubes 26 and 26. Therefore, this holds true even when the tubes 25 and 26 are unpressurized. Annular intestine stuffing mold 31 and its 1# for sealing
Shape 23 and J! Located on the opposite side of the end of 4, the sleeve for sealing j! l's web! ! It is formed at 2. The annular filling mold sls sz is pressed against the free end of the associated sealing lip, at least when the housing is not yet tightened. Such an annular filling mold is such that the sealing lips gs, g4 are prevented from rising from the outside diameter, ie, outer surface, of the tubes 2B and 86 by their free ends. circular intestine stuffing fjll
sx and 3! ! There are eight compartments, namely 27 and 7', separated from the ends of compartment 27 by, respectively, but hydraulically connected to each other, and in particular:
In FIG. 3, the anchor rings 29 and 30 are connected by a series of or open-ended holes in each of the annular filling molds 31 and 32.
The bent end 19 in the housing body 18 and! !
At the transition point of 0, it is supported at its longer diameter and is firmly fixed by an associated spring ring 34. A retractable spring or elastic ring 34 has a coil or winding in close contact around a wire ring 35.
It consists of rolled. This structure, i.e., the anchor rings 29 and 30 and the spring ring 34, are secured by the gasket, i.e., the backing sleeve 21, in the housing, whether or not they are tightened by the tightening bolts, i.e., the screw threads. guarantee that it remains in good condition. This structure makes it possible to reduce the inner diameter of the housing by tightening the bolt without at the same time exhibiting appreciable deformation of the anchoring ring or gasket. This occurs when the ratio of the wall thickness (ie, the sum of the housing wall thickness and the sleeve 21 wall thickness) to the diameter of the pipes to be connected is extremely small in the pipe joint.

FIG. 3 shows the housing 11 and the inwardly bent ends 19 and 20 of the body of the housing 11. The gasket or backing sleeve 21
2 directly presses the aforementioned ends 19 and 20, and the lips 23 and 24 are supported with their free ends on the annular filling fisl and 38 at the web 22. .

FIG. 4 shows the right end of the pipe joint shown in FIGS. 1 and S and the wall of the inserted tube 2b. Since the bolt 17 is not tightened here, the sound-shaped edge 23
is not pressed against the outer diameter or surface of tube 26. The ends of the two pipes are inserted into the pipe joint 10, and when the final position is reached, the bolts 11 are tightened, resulting in the state shown in FIG. Housing 11
has a smaller inner diameter, and the play between the outer diameter of the tube groove 6 and the end of the housing 11 becomes almost zero. Moreover, at the same time as the housing 11 becomes smaller, a sealing gasket, that is, a backing sleeve j! The external diameter of l is reduced and the sealing lips j13 and R4 are pressed tightly and flat against the respective external diameters of tubes IA5 and 26 by the action of the associated annular fillings I [31 and si, respectively. It will be done. Anchoring rings 29 and 30 bite into the outer diameter of the tube by means of their sharp-edged inner diameters.

If there is not only no overpressure, but also a decrease in pressure within the tubes, the connections of the tubes are tight.

If there is an increase in pressure or overpressure-force generation within the tube, the result will be as shown exaggerated in FIG. The holes 33 in the compartments 27 and the annular filling molds 31 and 32 allow the compartments 2 and 8 to also be connected to the tubes 25 and ! ! 6 by a pressurized medium. As a result, the saucer-shaped edges 23 and 24
is deformed from within and is pressed to form a flatter seal over the entire axial direction.

At the same time, compartments 2G and 2C are expanded, and sealing gaskets are added! ! The ends of the webs 22 of 1 cause the anchoring rings 29 and 30 to move axially outwardly, respectively. However, this can only be achieved by reducing the diameter of the smaller of the truncated conical anchor rings 29 and 30. As a result, such a spring, i.e. the mutually folded lamellae of the elastic ring, forms a tube 26.
It bites into the outer diameter of the housing 11 gradually and deeply, and seals the space occupied by the sealing gasket 21 in the housing 11 to the outside. The internal pressure in tubes 25 and 26 may also increase at this point beyond that of the material of sealing gasket 21. This is because as soon as the anchoring ring 29 and the sO bite into the outside diameter of the tube and these sheets are folded tightly together, the gasket material has no way to escape. Conversely, with increasing pressure, the sealing effect and the axial anchoring effect on the tube increases.

What is clear from the above explanation is that the annular filling molds 31 and 32 press the sealing lips 23 and 24 into a sealing state against the inner diameter of the tube when there is no pressure inside the tube, and therefore, There is no need to form the annular intestine mold with the same material as the gas nut. For example, if the gasket is resistant to pressure, temperature and the action of chemicals,
If the material has high resistance but rather loose elasticity, it can be used as a material for the annular filling molds 31 and 32.

Next, another embodiment of the annular intestine type is shown in FIGS. 7 to 119.

The annular fillings 5131 and 32 described above are formed as the filling mold 31 on the ring 38 independently from the web 22. 7th
W has a flat ring-shaped annular groove 39 which is open towards the inside at the end of the web 22, and at the groove there is a compartment 40 with an annular cross-section. The sealing lip 23 is shown located in the compartment 40.

The intestine filling mold 31 forms a part of a ring 38 as shown in FIG. The Wit surface shape of the ring 38 is connected to the intestine stuffing mold 31 through a thin web 42 at an annular extensible portion 41. FIG. 9 shows that the telescopic portion 41, that is, the spherical portion fits into the annular compartment 4o, and the outer circumference s8 of the ring
shows the part being pressed into the groove 39. The space or chamber delimited between the web 42 and the sealing lip gs gains its freedom and is formed at the ring 38 and extends through the filling mold 31. Web 2 of the sealing gasket via hole 33
A relationship is established with compartment 2ji existing inside 2.

The embodiment shown in FIGS. 7-9 has one manufacturing advantage. That is, both components can be manufactured easily. It is possible to make the materials shown in FIGS. 7 and 8 already have an annular shape in the vulcanization mold.

Since this invention is configured as described above, it can achieve the effects described above, that is, it can always be sufficiently sealed;
Moreover, it has the advantage that it is not difficult to select the material for the gasket.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the present invention, Fig. 2v! i~6th
The figure is a partial sectional view of FIG. 1, and FIGS. 7 to 9 are partial sectional views showing other embodiments. In the drawings, 11 is a housing, 21 is a sleeve, 2
3.24 has a lip-shaped margin, and 31 has an intestine-shaped margin. Patent applicant Shobond Construction Co., Ltd. Attorney
Harumi Uno Figure 1 Figure 4rlA 5th cause Figure 6 Procedural amendment 11 (method) % formula % 1. Indication of the case 1982 Patent Commissioner No. 139278 2. Name of the invention Pipe joint 3. Person making the amendment Relationship to the case Patent applicant address: 34, Ichigaya Honmura-cho, Shinjuku-ku, Tokyo Name: Representative of Shobond Construction Co., Ltd. 1) 1936, Agent address: #r 7-10, 19-19, Makagi, S. Hadajuku-ku, Tokyo 6. Subject of the amendment and details 7. Contents of the amendment as per attached MS and specification Description L Name of the invention Pipe joint 2. Claims The ends of the pipes to be connected to each other. A pipe joint to be connected to a pipe is composed of a housing that can be tightened around the end of the pipe, and a sealing sleeve with a zero-shaped cross section that has folded lip-shaped edges on both sides supported by a stuffing mold, A pipe joint characterized in that the sealing sleeve is inscribed in the inner periphery of the housing. & DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe joint comprising a housing and a sleeve for connecting pipe abutting portions of fluid transfer pipes. Conventionally, a Yuzu pipe joint has been proposed for pipe-to-pipe connection, and even with this Yuzu pipe joint, U.S. Patent No. 2259453
No. 246:135, No. 2491004, No. 24
No. 5131$4, No. 2508918, British Patent No. 88
No. 0204, West German Patent No. 2248361, etc. are introduced. Of course, the pipe joints introduced in these publications have many advantages, but there are some aspects that are not necessarily satisfactory with this proposal. In other words, it is necessary to take some measures to ensure that there is always sufficient pressure to achieve a complete sealing effect, and
Even if this is not the case, the web of the gasket connects the pipe joints, so severe shearing forces are always applied at some point, so the material of the gasket must be carefully selected. The present invention alleviates the above-mentioned drawbacks and provides a pipe joint that maintains a pipe-to-pipe connection in a water-tight and oil-tight manner. Pipe joints to be connected to each other include a housing that can be tightened around the ends of the pipes, and a sealing sleeve that has a zero-shaped cross section and has lip-shaped edges that are folded back on both edges and is supported by a stuffing mold. This is a pipe joint in which the sleeve is integrated with the inner periphery of the housing. Next, embodiments of the present invention will be described based on the drawings. In the pipe joint shown in FIG. 1, the pipe joint 10 includes a collar-shaped housing 11 that is tightened to form a tight seal; The housing 11 has two clamping brackets 13.14 welded to it, each having a free end edge bent by a clamping bracket 15.16, and two clamping brackets 13. 17. Therefore, the inner diameter of the entire housing 11 can be reduced by tightening the two bolts. By doing so, the width of the gap 12 bridged by a thin metal insert inserted between the sleeve and the housing, which is not specifically depicted here, is reduced to almost zero. Through the use of housing body 18 and inwardly bent ends 19 and 20, housing 11 has a sealing gasket or backing sleeve 21.
is stored inside it. In this practical example, the gasket IJ,-''7 is made of integral synthetic rubber.The gasket has an approximately 0-shaped cross section, and the ends of the gasket web 22 have inwardly facing ends. there are lip-shaped edges 23 and 24 for sealing;
It extends from both ends toward the center of the web. In FIG. 1, the two tubes to be connected, namely 25 and 26, are located at a distance from the root of their lip 23,24. It is tapered toward the free end of the minimum thickness, and has a tapered shape. With the tubes 25 and 26 inserted into the fittings, the sleeve 21 is sealed to the outside, while the interior of the tubes 25 and 26 is connected via the fitting 28 to the compartment 27. form. The sleeve 21 is pressed flat against the inner surface of the housing body 18 by the rear side of its web 22 and by the ends of the webs against an anchoring ring of laminar construction in each case. The anchor ring, as is clearly seen in FIG. The plate is thinned by providing a groove extending radially from the smaller diameter portion of the plate. The plate thus formed has the shape of a truncated cone since it is folded over one another. The sealing lips 23 and 24 are attached to the tubes 25 and j! Pressed tightly against the outer diameter of 6. Therefore, this holds true even when the tubes 25 and 26 are unpressurized. Annular fillers sz and s2 are located opposite the ends of the sealing edges 8s and 24 and are formed at the web 22 of the sealing sleeve 21. The annular filling mold 31, 32 is pressed against the free end of the associated sealing lip when the housing is not yet tightened. as, g4 are prevented from rising from the outside diameter, i.e. the outer surface, of the tubes 2B and 26 by their free ends. There are two compartments, respectively, which are hydraulically connected to each other, and in particular are provided with a series or one open end hole in each of the annular fillings M31 and 32. connected by In FIG. 3, the anchoring rod and 30 are supported and associated at their longer diameters at the transition points of the bent ends 19 and 20 in the housing body lp. It is firmly fixed by a spring ring 34. The extensible spring or elastic ring 34 consists of a coil or spring 36 with a winding wound in close contact around a wire ring 35. This structure, ie anchor rings 29 and 30 thorn rings! S4 ensures that the gas nut, or backing sleeve 21, remains firmly clamped within the housing, whether or not it is tightened by the tightening bolt, or screw 17. This construction makes it possible to reduce the internal diameter of the housing by tightening the bolts without at the same time exhibiting appreciable deformation of the anchor ring or gasket. This happens when the ratio of the pipe joint's thickness (i.e., the sum of the housing wall thickness and the sleeve thickness 1) to the diameter of the I pipe to be connected is extremely small. . FIG. 3 shows the inwardly bent ends 19 and 2o of the housing 11 and the housing 110 body. What about gasket F, that is, backing sleeve 21? nib 2
The said ends 19 and 2o are pressed directly by the loose ends, and the lip 23 and the lip are supported with their free ends on the annular filling molds 31 and 32 at the web 1R. There is. FIG. 4 shows the right end of the fitting shown in FIGS. 1 and 3 and the wall of the inserted tube 25. Here, since the pull) is not tightened, the lip-shaped edge aS
is not pressed against the outer diameter or outer surface of the tube 2B. When the ends of the two pipes are inserted into the pipe joint 10 and reach the final position, the bolt 1 is tightened, resulting in the state shown in FIG. 6. Housing 11
The inner diameter of the tube aS becomes smaller, and the play between the outer diameter of the tube aS and the end of the housing 11 becomes almost zero. Also, as the housing 11 becomes smaller, the outer diameter of the sealing gas gasket or backing sleeve 21 becomes smaller, and the sealing lips 23 and 21 are respectively associated with the annular filling. [31 and 32 are pressed tightly and flat against the respective outside diameters of tubes 25 and 26. Anchoring rings 29 and 30 bite into the outer diameter of the tube by means of their sharp-edged inner diameters. If there is not only no overpressure, but also a decrease in pressure within the tubes, the connections of the tubes are tight. If there is an increase in pressure or an overpressure within the pipe, the result will be as shown in an exaggerated manner in FIG. Compartments 2 and 2 are separated by compartments 27 and holes 33 in the annular filling molds 31 and 32.
The flaps are also pressed by the pressurized medium inside the tubes 25 and 26. As a result, the lips 2S and 84 are deformed from within and are pressed 1 into a flatter seal across the axial body. At the same time, the compartments z7'M and 2de expand, and the ends of the webs 82 of the sealing gasket 21 cause the anchoring rings 29 and 30 to move axially outwards, respectively. However, this is only possible by reducing the diameter of the smaller of the truncated conical anchor rings 29 and 30. As a result, such a spring, that is to say the interfolding thin plates of the elastic ring, bites deeper and deeper into the outer diameter of the tube 25 and seals the space occupied by the sealing gasket 21 in the housing I from the outside. The internal pressure of the tube and 26 can also increase at this point beyond that of the material of the sealing gasket gz. This is because as soon as the anchoring rings 29 and 30 bite into the outside diameter of the tube and these sheets are folded tightly together, the gasket material has no way to escape. Conversely, with increasing pressure, the sealing effect and the axial anchoring effect on the tube increases. What is clear from the above explanation is that the annular intestine filling molds 31 and 32 press the sealing edges 2s and 2 to form a seal against the inner diameter of the tube when there is no pressure inside the tube, and therefore, There is no need to form the annular intestine filling mold with the same material as gasket F. If the gasket has a high resistance to the effects of pressure, temperature, lubricants, or chemicals, but has rather low elasticity, the annular gasket molds 31 and 3 can be used.
It can be used as a material for 2. Next, another embodiment of the annular intestine type is shown in FIGS. 7 to 9. The aforementioned annular filling molds s1 and 38 are formed as a filling mold 31 in a ring 38 independently from the web 22. In FIG. 7, the web gg has a flat ring-shaped annular groove 39 that is open toward the inside at the end portion, and has an annular cross section at the groove, and has a compartment 40s and a compartment 40. The sealing lip 23 is shown in position. The intestine filling IJsl forms part of the ring 38 as shown in FIG. The cross-sectional shape of the ring 38 is an annular expandable portion 41 which is connected to the intestine stuffing mold 31 via a thin-walled nib 42. FIG. 9 shows that the telescopic portion 41, ie, the spherical portion, fits into the annular compartment 40, and the outside of the ring #1lI
sa is shown being pressed into the groove s9. The space or compartment 2 de divided between the web 48 and the sealing edge 23 has its freedom, and the hole s3 formed at the ring 38 and extending through the filling 1131 A relationship is established with the compartment 2D existing inside the spider nib U of the sealing gasket. The embodiment shown in FIGS. 7-9 has manufacturing advantages. That is, both components can be manufactured easily. It is possible to make the materials shown in FIGS. 7 and 8 already have an annular shape in the vulcanization mold. Since this invention is configured as described above, it can achieve the effects described above, that is, it can always be sufficiently sealed;
Moreover, it has the advantage that the material for the gasket F is not difficult to select. 1 [Brief explanation of surfaces 1111 is a partially cutaway perspective view of the present invention,
iW is a partial sectional view of FIG. 1, and FIGS. 7 to 9 are partial sectional views showing other embodiments. In the drawings, ll is a housing, 21 is a sleeve 23
, Ha has a lip-shaped edge, and 31 has a stuffed-intestine type. Patent applicant: Shobond Construction Co., Ltd. Attorney Harumi Uno

Claims (1)

[Claims] A pipe joint that connects the ends of pipes to each other has a housing that can be tightened around the ends of the pipes, and a folded lip-shaped edge on both sides that is supported by a stuffing mold. A pipe joint comprising a sealing sleeve having a zero-shaped cross section, the sealing sleeve being inscribed in the inner periphery of the housing.