KR20140025124A

KR20140025124A - Connection assembly for corrugated pipes

Info

Publication number: KR20140025124A
Application number: KR1020120091359A
Authority: KR
Inventors: 최진림
Original assignee: 동아금속주름관(주)
Priority date: 2012-08-21
Filing date: 2012-08-21
Publication date: 2014-03-04

Abstract

The present invention relates to a connection assembly for corrugated pipes. The connection assembly for corrugated pipes comprises a nut inserted into the outer circumference of a corrugated pipe; a hanging piece of which at least a part is inserted into a valley part located on one end of the corrugated pipe; a socket connected to the nut; and a packing member located between the end of the corrugated pipe and the socket. A groove unit is formed on the front surface of the socket, and a part of the packing member is inserted into the groove unit. Therefore, the present invention can improve the watertight seal of a connection part of the corrugated pipe and prevent loss of the packing member and the degradation of the appearance.

Description

Connection Assembly for Corrugated Pipes

The present invention relates to a connecting assembly of a corrugated pipe, and more particularly, in a connecting assembly for connecting a corrugated pipe to a predetermined socket, the sealing function of the connecting portion of the corrugated pipe and the socket can be improved, and the connecting operation can be easily performed. A connection assembly for corrugated pipes.

1 is an exploded perspective view showing an example of the connection assembly of the corrugated pipe according to the prior art, Figure 2 is a partial cross-sectional view of the corrugated pipe connected by the connecting assembly of the corrugated pipe of FIG.

The connection assembly of the corrugated pipe according to the prior art is composed of a corrugated pipe 10, a socket 30 connected to the corrugated pipe 10, and a tightening nut 20 connecting the corrugated pipe 10 and the socket 30.

Corrugated pipe 10 has a non-wrinkle portion 12 is formed in the portion connected to the socket 30 is not wrinkled, the end of the wrinkle portion 12 is caught in the tightening nut 20 inside the tightening nut ( An extension portion 14 is formed to perform the sealing function when the socket 30 is connected while preventing the 20 from falling out.

The socket 30 has a male screw 32 which is fastened to the tightening nut 20 at the front side thereof, and a tapered portion 34 whose outer diameter gradually decreases toward the end thereof so as to face the extension 14 of the corrugated pipe 10 at the front end thereof. ) Is formed.

The tightening nut 20 has a female screw 22 coupled to the male screw 32 inside the socket 30, and one side of the tightening nut 20 is formed with an inclined surface to cover the expansion portion 14 of the corrugated pipe 10. 24 is formed.

The corrugated pipe 10 connection assembly according to the related art inserts the tightening nut 20 into the non-wrinkle portion 12 of the corrugated pipe 10, and then processes the expanded portion 14 so that the tightening nut 20 does not fall out. One state is made up of one set.

In order to connect the socket 30 in the state in which the tightening nut 20 is assembled to the corrugated pipe, the socket 30 is brought into contact with the tightening nut 20, and when the tightening nut 20 is rotated, the taper of the socket 30 is tapered. The portions 34 are connected to each other while being in close contact with the expansion portion 14 of the corrugated pipe 10.

However, in the connection assembly of the corrugated pipe 10 according to the prior art, in order to connect the corrugated pipe 10 and the socket 30, the non-wrinkle portion 12 is formed in the corrugated pipe 10 to insert the tightening nut 20. If one wants to shorten the length of the pipe as necessary, the expansion part 14 of the corrugated pipe 10 needs to be processed separately, and the stainless steel corrugated pipe 10 of In this case, there is a problem that can not control the length of the corrugated pipe (10) because it is impossible to field processing.

In addition, the connection assembly of the corrugated pipe 10 according to the prior art, the expansion portion 14 of the corrugated pipe 10 and the tapered portion 34 of the socket 30 is in close contact by the fastening force of the tightening nut 20 is connected. Although it has a structure, the close contact structure of the stepped portion 24 of the tightening nut 20, the expanded portion 14 of the corrugated pipe 10, and the tapered portion 34 of the socket 30 must be exactly matched to ensure a reliable seal ( Since the watertight) structure is secured, the pre-machining of the close parts must be precise, and the manufacturing cost is greatly increased due to such precision machining, and there is a problem in that the usability decreases due to high tightening torque.

On the other hand, in order to solve the above problems, the inventor inserts a tightening nut on one end of the corrugated pipe, inserts a locking piece on the outer peripheral surface of the bone located at one end of the corrugated pipe, and inserts a packing member between the end of the corrugated pipe and the socket After positioning, when the tightening nut is rotated and fastened to the socket, the end of the corrugated pipe contacted with the packing member is pressed and deformed while being pressed against the packing member, thereby deforming and contacting the packing member. Invented and patented as Patent No. 794946.

However, in the above-mentioned invention, when the fastening nut is fastened to the socket after the packing member is positioned between the end of the corrugated pipe and the socket, the packing member often has a problem that the packing member is separated from the socket and the fastening nut and is lost. During the fastening process, the packing member is flowed and the packing member is eccentrically coupled at the place where it is not, or the entire surface of the end of the corrugated pipe cannot be brought into close contact with the packing member. There is a problem.

In addition, the above-mentioned invention has a problem that the sealing portion between the tightening nut and the socket connecting portion of the corrugated pipe flows or is deformed due to the non-uniform sealing surface when the bent corrugated pipe after the tightening of the tightening nut and the socket is completed, leakage occurs There is this.

In addition, when the coating part is provided on the outer side of the corrugated pipe, the invention patent invention, in order to fasten the tightening nut and the socket, a part of the coating part close to the connection part must be peeled off, and after the fastening is completed, a part of the connecting part of the corrugated pipe is completed. Is exposed in the state of a bare tube without a coating part, foreign matters such as moisture directly contact the corrugated pipe from the outside, causing corrosion, and the aesthetics are also reduced.

An object of the present invention is to provide a connection assembly of the corrugated pipe that can improve the sealing function by preventing the movement of the packing member to form a uniform and tight sealing surface.

Another object of the present invention is to prevent the packing member is separated and lost during the connection of the corrugated pipe and the socket.

Still another object of the present invention is to prevent bending of the corrugated pipe, deformation of the sealing part during displacement, and prevention of foreign substances such as moisture causing metal corrosion from entering the sealing part from the outside after the piping work of the corrugated pipe is completed.

The connection assembly of the corrugated pipe according to the present invention includes a tightening nut inserted into an outer circumferential surface of the corrugated pipe, a locking piece at least partially inserted into a bone portion located at one end of the corrugated pipe, a socket fastened to the tightening nut, and Consists of a packing member located between the end of the corrugated pipe and the socket, the front surface of the socket is formed with a recess, the packing member is characterized in that at least a part is pressed in the recess.

Here, the packing member may include a ring portion in which the end of the corrugated pipe is in surface contact, and a protruding portion protruded toward the socket from the ring portion by forming a narrower upper and lower width than the ring portion.

In addition, the groove portion may be formed in a size that the protrusion is forcibly fitted.

On the other hand, the fastening nut is provided with a seating portion into which the locking piece is inserted when the socket is fastened, and the diameter of the seating portion is formed smaller than the outer diameter of the locking piece so that the locking piece is forced by the tightening force of the fastening nut to the seating portion. Can be fitted.

In addition, the inlet portion adjacent to the seating portion may have a larger diameter than the tightening nut, and may be formed in a tapered shape that gradually decreases in diameter toward the seating portion so that the latching jaw may be easily inserted into the seating portion.

In addition, a coating portion having a predetermined thickness may be formed on an outer circumferential surface of the corrugated pipe, and the tightening nut may extend in a direction opposite to the socket to form a sleeve surrounding a portion of the coating portion.

In addition, another embodiment of the connection assembly of the corrugated pipe according to the present invention, the corrugated pipe formed with a coating portion on the outer peripheral surface, the female thread is inserted into the outer peripheral surface of the corrugated tube and formed on the inner peripheral surface and tightening the sleeve formed to surround a portion of the coating portion of the corrugated tube It consists of a socket formed with a nut, a locking piece inserted into a bone portion formed at one end of the corrugated pipe, and a male thread screwed to the female screw of the tightening nut.

Meanwhile, a packing ring may be installed between the coating portion of the corrugated pipe and the tightening nut to prevent the inflow of foreign substances such as moisture, and the packing ring may be inserted into a seating groove formed on the inner side of the sleeve.

In the connection assembly of the corrugated pipe according to the present invention, since a part of the packing member is inserted into the front of the socket to fix the socket, the fastening nut and the socket are fastened, and thus the sealing surface is uniformly formed, thereby improving the sealing function. When the separation of the packing member is prevented when the fastening operation is performed easily.

In addition, the connection assembly of the corrugated pipe according to the present invention, even if the cover portion of the cover portion covered with the corrugated tube is peeled off close to the connection portion of the tightening nut and the socket, because the cover portion is peeled off by the sleeve formed on one side of the tightening nut is covered. Not only is this improved, but also the sealing function is maintained because the deformation of the connection part is prevented even when the corrugated pipe is bent.

In addition, the connection assembly of the corrugated pipe according to the present invention is a part of the coating portion covered with the corrugated pipe is covered by the sleeve formed on the tightening nut, so that the coating portion is in close contact with the sleeve, so that foreign matters such as moisture from the outside to the connection portion of the corrugated pipe and the socket are formed. Ingress is blocked to prevent corrosion.

1 is an exploded perspective view showing an example of a connection assembly of the corrugated pipe according to the prior art,
2 is a partial cross-sectional view of the corrugated pipe connected by the connecting assembly of the corrugated pipe of FIG. 1,
Figure 3 is an exploded perspective view showing one embodiment of the connection assembly of the corrugated pipe according to the present invention,
4 is a partial cross-sectional view of the corrugated pipe connected by the connecting assembly of the corrugated pipe of FIG. 3, FIG.
5 is an enlarged view of part “A” of FIG. 4 and is a cross-sectional view showing a state before and after connection.

Hereinafter, an embodiment of the connection assembly of the corrugated pipe according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is an exploded perspective view showing an embodiment of the corrugated pipe connecting assembly according to the present invention, Figure 4 is a partial cross-sectional view of the corrugated pipe connected by the connecting assembly of the corrugated pipe of Figure 3, Figure 5 is the "A" part of Figure 4 Is an enlarged view, showing a state before and after connection.

One embodiment of the connection assembly of the corrugated pipe according to the present invention, as shown in Figure 3, the corrugated pipe 50 is formed with a continuous corrugation (52, 53) around the tube (Tube), and the corrugated pipe (50) Protruding in the radial direction in a state that a part is inserted into the tightening nut 60 inserted into the outer side, and the bone portion located at one end of the corrugated pipe 50 to prevent the tightening nut 60 from being separated from the corrugated pipe 50 The socket 90 and the socket 90 for pressing and deforming the end 55 of the corrugated pipe 50 between the locking piece 70 and the locking piece 70 in the process of being engaged with the locking piece 70 and the tightening nut 60. Located between the end 55 of the corrugated pipe 50 includes a heat-resistant packing member 80 that performs a sealing action.

Here, the pleats 52 and 53 formed in the corrugated pipe 50 are continuously formed around the tube. For convenience of description, the small diameter portion is referred to as the "bone portion 52", and the large diameter portion is referred to as the "mounted portion 53." It will be referred to as ")".

The locking piece 70 is inserted into the bone portion 52 whose inner portion is formed at one end 54 of the corrugated pipe 50.

On the other hand, the socket 90 is coupled to the tightening nut 60, the male screw 92 on the outer peripheral surface to be coupled to the female screw 62 of the tightening nut 60 inserted into the outer side of the corrugated pipe (50). Is formed.

The tightening nut 60 is formed so that the inner diameter of the portion facing the socket 90 is larger than the outer diameter formed by the acid portion 53 of the corrugated pipe 50 so that the tightening nut 60 can be fitted to the outside of the corrugated pipe 50. The stepped portion 64 is formed in contact with one side of the locking piece 70 so that the locking piece 70 can be caught by the side of the portion where the female screw 62 is formed.

In addition, the tightening nut 60 has a seating portion 65 in contact with the outer circumferential surface of the locking piece 70 toward the side where the female screw 62 is formed from the stepped portion 64.

Here, the inner diameter of the seating portion 65 (refer to 'II' in FIG. 5A) is formed to be smaller than the outer diameter of the locking piece 70, so that the tightening nut 60 and the socket 90 are fastened. In the process, the locking piece 70 is forcibly fitted.

On the other hand, a tapered portion 62 'is formed to be tapered from the end of the female screw 62 of the tightening nut 60 to the inlet of the seating portion 65, so that the locking piece 70 is easily seated. Can be imported.

The taper portion 62 ′ performs a function of allowing the fastening nut 60 and the socket 90 to be fastened to the seating portion 65 while being guided by the locking piece 70.

That is, in the inlet part of the seating part 65, the taper part 62 'has a larger diameter than the inner diameter II of the seating part 65, and the taper becomes gradually smaller toward the seating part 65. It is formed in the shape and the locking piece 70 is guided to the seating portion 65 is formed to be easily fixed fixed.

The locking piece 70 is preferably formed of a metal material such as stainless steel, and is divided into one or more pieces so as to be easily coupled to the valley portion 52 of the corrugated pipe 50. In one embodiment of the present invention is divided into two as shown in Figure 3 is configured to be coupled to both sides of the corrugated pipe (50).

The socket 90 is a male screw 92 which is fastened to the female screw 62 of the tightening nut 60 inserted into the one end 54 of the corrugated pipe 50 on the outer circumferential surface at the center of the hexagonal head 91 of the center. Is formed, and a male screw (not shown) is formed on the other outer peripheral surface of the hexagonal head 91 to be engaged with a joint body (not shown).

Meanwhile, a flat annular crimp portion 95 is formed on the front surface of the socket 90 so that the end 55 of the wrinkle tube 50 is crimped when the socket 90 and the tightening nut 60 are fastened. As shown in FIG. 3, the crimping part 95 is provided with a recess 95a recessed toward the hexagonal head 91.

On the other hand, the packing member 80 is formed in a circular ring structure, which is located between the end 55 of the corrugated pipe 50 and the crimping portion 95 of the socket 90 to seal the fluid flowing in the pipe so as not to leak out Perform the function.

In particular, the packing member 80 is preferably used as non-asbestos packing or soft metal packing excellent in heat resistance and strong mechanical strength, also excellent in corrosion resistance and wear resistance.

In addition, in the connection assembly of the corrugated pipe according to an embodiment of the present invention, the packing member 80 provided between the tightening nut 60 and the socket 90 at the time of connection of the corrugated pipe 50 is flowed in the fastening process to the correct position In order to solve the sealing deterioration problem caused by the eccentricity of the fastening is started from the place where the fastening is started, the packing member 80 to be integrally fixed to the groove (95a) formed in the socket 90 before the fastening is started Is formed.

More specifically, the packing member 80 includes a ring portion 81 that is in contact with the end 55 of the corrugated pipe 50, and a protrusion 82 protruding annularly from the ring portion 81 toward the socket 90. It includes. Here, the protrusion 82 is a portion inserted in the opposite direction to the fastening direction with respect to the tightening nut 60 of the socket 90 to the groove portion 95a formed in the crimping portion 95 of the socket 90. Concave portion (95a) is preferably formed in a size that the projection portion 82 is fitted. Therefore, the protrusion 82 is forcibly fitted into the recess 95a, and when the packing member 80 is fastened to the socket 90 in a state where the packing member 80 is integrally fixed to the socket 90, the fastening process Since the flow of the packing member 80 does not occur, it is possible to solve the sealing degradation problem and the loss problem of the packing member 80 that occurred conventionally.

On the other hand, in one embodiment of the connection assembly of the corrugated pipe according to the present invention, the outer peripheral surface of the corrugated pipe 50 may be provided with a coating portion 51 of a predetermined thickness. The coating part 51 is provided to cover the outer circumferential surface of the corrugated pipe 50, thereby preventing corrosion of the corrugated pipe 50 by blocking foreign substances such as moisture and performing a function of alleviating external impact.

The coating part 51 peels off a predetermined portion so that the catching piece 70 is installed at one end of the corrugating pipe 50. The portion of the corrugated pipe 50 from which the coating part 51 is peeled off may be exposed in a screw condition. There is no choice but to greatly affect the durability of the corrugated pipe 50.

Therefore, in the present invention, the sleeve 61b surrounding the portion of the corrugated pipe 50 in the bare tube state in which the covering part 51 is peeled off is formed to extend at one end of the tightening nut 60. Unexplained reference numeral 61a is a hexagonal head formed in the same shape as the hexagonal head 91 of the socket 90 so that the operator can rotate using the extension.

The sleeve 61b is formed to be larger than the outer diameter of the covering portion 51 so that the covering portion 51 is wrapped and extends to a predetermined length in a direction facing the socket 90.

On the other hand, since the sleeve 61b is formed to have a larger inner diameter than the coating portion 51 as described above, foreign matter such as moisture from the outside through the sleeve 61b and the coating portion 51 tightening nut 60 ) And the socket 80 may be drawn into the connection side. In order to prevent this, the packing ring 100 may be interposed between the sleeve 61b and the cover 51. The packing ring 100 may be made of an elastic material that is fitted to the outside of the coating part 51, and more preferably, may be made of a soft rubber material.

The inside of the sleeve 61b may be formed with a mounting recess 61c in which the packing ring 100 is seated. The packing ring 100 may be seated in the seating recess 61c of the sleeve 61b to maintain a tighter water tightness.

Referring to the operation of one embodiment of the connection assembly of the corrugated pipe according to the present invention configured as described above are as follows.

First, referring to the assembling procedure for connecting the corrugated pipe 50, as shown in Figure 5, the tightening nut 60 is inserted into one end of the corrugated pipe 50, and then the catching piece 70 to the corrugated pipe 50 Inserted into the bone portion 52 formed at one end 54 of the), and pulling the tightening nut 60 to the end of the corrugated pipe 50, the outer peripheral end of the locking piece 70 is primarily tapered portion 62 Is located in ').

At this time, as shown in Fig. 5 (a), the outer diameter (III) of the locking piece 70 is formed larger than the diameter (II) of the seating portion 65 from which the tapered portion 62 'starts, It is formed smaller than the shortest diameter I of 62, and the locking piece 70 is in contact with the taper part 62 ', without being caught by the female screw 62. As shown in FIG.

Then, when the male screw 92 of the socket 90 is fastened to the female screw 62 of the tightening nut 60, the locking piece 70 is engaged with the tapered portion 62 ', and (b) of FIG. As shown in), the tightening nut 60 is forcibly moved to the end of the corrugated pipe 50 by the fastening force between the socket 90 and the tightening nut 60, wherein the locking piece 70 is the front end portion As the outer diameter of the locking piece 70 decreases while moving toward the seating portion 65 along the tapered portion 62 ', it is forcibly fitted to the seating portion 65 to be perpendicular to the axis of the corrugated pipe 50 at the seating portion 65. Since it is tightly fixed, it can be prevented from flowing.

At this time, the outer ring surface is inserted into the seating groove portion 61c of the sleeve 61b of the packing ring 100 interposed on the outer side of the coating portion 51 surrounding the outer side of the corrugated pipe 50 while the tightening nut 60 is moved. do.

Meanwhile, the protrusion 82 of the packing member 80 is forcibly pressed into the recess portion 95a of the socket 90 to fix the packing member 80 to the socket 90, and then to the socket 90, a tightening nut ( When 60 is fastened, the packing member 80 is contacted with the end 55 of the corrugated pipe 50 by the fastening force of both, and the end 55 of the corrugated pipe 50 is compressed and deformed, as shown in FIG. As described above, the end 55 of the corrugated pipe 50 and the packing member 80 are in close contact with each other in surface contact. As such, the fastening nut 60 is fastened to the fastening nut 60 in a state in which the packing member 80 is fixed to the socket 90, and the flow of the packing member 80 is prevented during the fastening process, so that the end 55 of the corrugated pipe 50 is closed. Since a uniform sealing surface is formed between the packing member 80, the watertightness is improved as well as the loss of the packing member 80 in the fastening process is prevented.

On the other hand, the packing ring 100 is interposed between the sleeve 61b and the covering part 51 as described above, and the corrosion of the metal is prevented because foreign matters such as moisture are blocked by the connection portion of the corrugated pipe 50.

Or more, one embodiment of the connection assembly of the corrugated pipe according to the present invention was described in detail with reference to the accompanying drawings. However, the embodiment of the present invention is not limited to the above-described embodiment, and it will be obvious that various modifications and equivalents can be made by those skilled in the art to which the present invention pertains. . Therefore, it is to be understood that the true scope of the present invention is defined by the appended claims.

50: corrugated pipe 55: end
60: tightening nut 61b: sleeve
70: locking piece 80: packing member
90: socket 95a: groove
100: packing ring

Claims

A tightening nut inserted into an outer circumferential surface of the corrugated pipe;
A catching piece into which at least a portion is inserted into a bone portion located at one end of the corrugated pipe;
A socket fastened to the tightening nut;
It is composed of a packing member located between the end of the corrugated pipe and the socket,
Grooving portion is formed on the front surface of the socket, the packing member is a connection assembly of the corrugated pipe is installed at least a part of the groove is pressed into the groove.

The method according to claim 1,
The packing member,
A ring portion of which one end of the corrugated pipe is in surface contact;
The upper and lower widths are narrower than the ring part, and includes a protrusion projecting from the ring part toward the socket, wherein the packing member protrudes from the socket.

The method according to claim 2,
The groove portion is a connection assembly of the corrugated pipe formed to the size that the protrusion is forcibly fitted.

The method according to claim 1,
The tightening nut is provided with a seating portion into which the locking piece is inserted when the socket is fastened with the socket,
The diameter of the seating portion, the connecting assembly of the corrugated pipe formed smaller than the outer diameter of the locking piece so that the locking piece is forced to the mounting portion.

The method of claim 4,
And a tapered portion having a tapered portion gradually smaller toward the seating portion between the seating portion inlet and the end of the female screw formed on the tightening nut.

The method according to claim 1,
On the outer circumferential surface of the corrugated pipe, a coating part having a predetermined thickness is formed,
The tightening nut, the assembly assembly of the corrugated pipe including a sleeve extending integrally formed in a direction opposite to the socket to surround a portion of the coating.

A corrugated pipe having a coating portion formed on an outer circumferential surface thereof;
A tightening nut inserted into an outer circumferential surface of the corrugated pipe and having a sleeve formed to surround a portion of the coating portion of the corrugated pipe;
A catching piece inserted into a bone portion formed at one end of the corrugated pipe;
Connection assembly of the corrugated pipe comprising a socket coupled to the tightening nut.

The method according to claim 6 or 7,
Further comprising a packing ring interposed between the coating portion of the corrugated pipe and the tightening nut,
The packing ring connection assembly of the corrugated pipe is inserted into the seating groove formed in the inner surface of the sleeve.