KR101488337B1 - Coupling - Google Patents

Coupling Download PDF

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Publication number
KR101488337B1
KR101488337B1 KR20140056649A KR20140056649A KR101488337B1 KR 101488337 B1 KR101488337 B1 KR 101488337B1 KR 20140056649 A KR20140056649 A KR 20140056649A KR 20140056649 A KR20140056649 A KR 20140056649A KR 101488337 B1 KR101488337 B1 KR 101488337B1
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KR
South Korea
Prior art keywords
pipe
window
coupling
segment
pair
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Application number
KR20140056649A
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Korean (ko)
Inventor
안정섭
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연우지에스티 주식회사
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Priority to KR20140056649A priority Critical patent/KR101488337B1/en
Application granted granted Critical
Publication of KR101488337B1 publication Critical patent/KR101488337B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L17/00—Joints with packing adapted to sealing by fluid pressure
    • F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
    • F16L17/04—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket with longitudinally split or divided sleeve

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The present invention relates to a coupling for visually confirming that the key of a coupling is seated in a groove of a pipe.
The coupling according to one embodiment of the present invention is a coupling for connecting the ends of two pipes having a circumferential groove at a position spaced apart from the end of the pipe, the coupling comprising a plurality Wherein each of the segments has a pair of keys protruding radially inwardly and engaging with the circumferential groove of the pipe, the pair of keys being spaced apart from each other to form a space, The key further comprising a window that includes an outer surface and an inner surface facing each other and an intermediate surface located between the outer surface and the inner surface, the window being recessed from the outer surface toward the inner surface, Is shorter than the length of the intermediate surface without a window.

Description

Coupling {Coupling}

The present invention relates to a coupling for connecting two pipes together, and more particularly to a coupling for visually confirming the reliability of connection of two pipes.

Coupling refers to a device that fixes the ends of two pipes by connecting them together. The coupling includes a plurality of segments for connecting the ends of the pipes and the segments join coaxially aligned pipes around the circumference with circumferential grooves disposed adjacent the end of each pipe.

Prior to the description of the conventional coupling, a pipe connected by a coupling will be described.

A pipe is a circular section generally having a space in which a fluid can flow and has a certain length. In the present specification, however, the term "pipe" refers not only to a straight pipe but also to other types of fittings such as an elbow, a tee, and the like. Coupling is also used to connect pipes to fluid control components such as valves, reducers, strainer, restrictors, pressure regulators, as well as the connection of two pipes.

On the other hand, the types of pipes are divided into metal pipes and nonmetallic pipes depending on the material, and the metal pipes are steel pipes, copper pipes, stainless pipes and the like. Nonmetallic pipes include PVC pipes, PB pipes and meta-pipes.

More specifically, the steel pipe is divided into a white pipe and a black pipe, and it is most widely used in water pipes, digestive pipes, gas pipes, heating pipes, and the like because it is easy to construct on site and has good durability. On the other hand, copper pipes are classified into K.L.M.N. It has good thermal conductivity and is widely used in heat exchangers and heating coils. And the stainless steel pipe is made of iron and tin alloy, so it has high rigidity and is strong against impact.

On the other hand, in order to couple the two pipes by the coupling, grooves should be provided around the pipe at the adjacent positions at the end of the pipe. The grooves of the pipe are typically made by cold forging. Cold forging refers to a forging method that is carried out at room temperature without heating the material. Cold forging to make a groove in a pipe compresses the pipe between the roller pressing the outer surface of the pipe toward the center of the pipe and the backup roller pressing the inner surface of the pipe opposite the roller.

The shape of the groove of the pipe uses a roller having a shape desired by the user, and the backup roller helps to accurately form the groove of the pipe when the pipe is pressed by the roller. In the case of the steel pipe or copper pipe, the groove shape desired by the user can be formed according to the shape of the roller. Normally, when a cylindrical roller is used, the side surface of the groove is formed perpendicular to the central axis of the pipe. However, since the stainless steel pipe has higher rigidity than other pipes, it is difficult to form a desired groove shape by the user, and the boundary between the side surface and the bottom surface of the groove is unclear. This means that the side surface of the groove is formed obliquely, and the length of the bottom surface of the groove becomes narrower toward the center of the pipe. Therefore, in the case of a stainless steel pipe, a problem may arise in coupling the coupling due to the above reasons, which will be described later.

1 is a perspective view of a conventional coupling;

Referring to FIG. 1, with reference to the conventional coupling 100, the coupling 100 comprises a pair of semicircular segments 110. The segment extends radially inwardly toward the pipe 10 and has a pair of keys 112 that fit into the grooves around the pipe and have a fixed space 114 between the pair of keys 112 do. The segment 110 includes a fixing portion 130 having a hole 132 through which the bolt 140 and the nut 142 can be inserted so that the segment 130 can be fastened to the other segment.

The key is fitted in the groove to fix the pipe against internal pressure and external force applied to the pipe. External forces can also be due to thermal expansion and compression of the pipe due to temperature changes, the weight of large diameter pipes and valves, wind and seismic loads. In other words, it is desirable that the coupling resist the rotation of the pipe, resist axial movement of the pipe due to internal pressure, and resist the angular deflection of the pipe.

When the two pipe ends fixed by the coupling are disposed properly spaced from each other, the pressure of the fluid increases the sealability of the coupling. Thus, the operator tightens the bolts or nuts of the coupling with a predetermined torque so as to have an appropriately spaced distance, thereby pushing the pipe axially so that the key can be engaged with the appropriate part of the groove. Such a coupling coupling method is effective when the shape of the groove has a side perpendicular to the central axis of the pipe.

However, when the shape of the groove has an oblique side, the key is seated on the oblique side of the groove and the adhesion force is reduced. As a result, the leakage of the fluid and the pressure drop may occur. A problem of deviating occurs. This is especially true in the case of a stainless steel pipe having an oblique side surface.

In addition, since it is impossible to visually confirm whether or not the key is properly installed in the groove, coupling coupling failure occurs depending on the skill of the operator and the working environment. To prevent this, the bolt and nut are forcibly tightened to damage the concentricity of the pipe There is also a problem.

The present invention relates to a coupling for solving the above-mentioned problems, and an object of the present invention is to provide a coupling that can visually confirm that a key of a coupling is seated in a groove of a pipe.

It is also an object of the present invention to provide a coupling that provides reliability in coupling coupling irrespective of various work environments or skill of a worker.

Another object of the present invention is to provide a coupling that prevents leakage of pipes and pressure drop by increasing the adhesion between pipes, and prevents the pipes from being separated by fixing the pipes.

According to an aspect of the present invention there is provided a coupling for connecting ends of two pipes having a circumferential groove at a location spaced from an end of the pipe, the coupling comprising a plurality of segments wrapping around the perimeter of the two pipes Wherein each segment has a pair of keys protruding radially inwardly to engage the circumferential groove of the pipe, the pair of keys being spaced apart from each other to form a space, Further comprising a window having an outer surface and an inner surface facing each other and an intermediate surface located between the outer surface and the inner surface and being recessed from the outer surface toward the inner surface, And the length is shorter than the length of the intermediate surface outside the window.

In other words, the coupling may be provided wherein the length of the intermediate surface of the window is shorter than the length of the intermediate surface without the window.

The maximum height of the window is longer than the depth of the circumferential groove of the pipe.

And the window is provided on the outer surface of each of the pair of keys of the segment.

Further, the window is characterized in that one or a plurality of windows are formed on the outer surface of each of the pair of keys of the segment.

One end of the segment has a convex portion and the other of the segments has a concave portion.

In addition, the present invention is characterized in that at the end of the segment, a fixing part formed to extend in a direction opposite to the center of the pipe, and a fastening frame formed in the fixing part and through which a bolt for coupling with another segment passes.

The segment may be formed of a stainless steel casting.

According to another aspect of the present invention there is provided a coupling for coupling two pipes having a circumferential groove at a location spaced from an end of the pipe, the coupling comprising a plurality of segments covering the circumference of the pipe, Each segment including a predetermined space between a pair of keys protruding in the direction of the center of the pipe and the pair of keys, the key comprising an intermediate surface in contact with a bottom surface of the groove of the pipe, An outer surface connected to one end and connected to an outer portion of the segment and an inner surface connected to the other end of the intermediate surface and connected to an inner portion of the segment, Wherein the window is provided with a wall surface parallel to the outer surface thereof, Characterized in that the length from the wall surface to the inner surface is shorter than the length from the outer surface to the inner surface and wherein the window has one or more on each outer surface of the pair of keys of the segment Coupling may be provided.

According to one embodiment of the present invention, it is possible to visually confirm that the key of the coupling is seated in the groove of the pipe to confirm whether the key is properly seated in the groove.

In addition, regardless of various work environments or the skill of the operator, the coupling is provided with reliability, and the key is properly seated in the groove.

In addition, the present invention provides a coupling that prevents leakage and pressure drop of the pipe by increasing the adhesion force between the pipes, and prevents the pipe from coming off by fixing the pipe.

1 is a perspective view of a conventional coupling;
2 is a perspective view of a coupling according to the present invention.
3 is a perspective view of a coupling according to the present invention installed in two pipes.
4 is a cross-sectional view of a coupling according to the present invention installed on two pipes.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art. Thus, the shape of the elements in the figures has been exaggerated to emphasize a clearer description. Like reference numerals throughout the specification denote like elements.

2 is a perspective view of one embodiment of a coupling according to the present invention. 3 is a perspective view of a coupling according to the present invention installed in two pipes. 4 is a cross-sectional view of a coupling according to the present invention installed on two pipes.

4, the pipe 10 has a cylindrical groove 12 along the periphery of the pipe 10 at a position spaced apart from the end 14 of the pipe 10 I have. The groove 12 extends away from the end 14 of the pipe 10 and has a first side 12a forming the side of the groove 12 and a second side 12b close to the end 14 of the pipe 10, And a bottom surface 12b connected to the first side surface 12a and the second side surface 12c and disposed between the first side surface 12a and the second side surface 12c.

The first side surface 12a and the second side surface 12c may be perpendicular to the vertical direction of the pipe 10 and may be obliquely installed depending on the material of the pipe 10. [

Referring to Figure 2, a coupling 200 according to the present invention will be described. The coupling 200 according to the present invention includes a plurality of segments 210 that wrap around and connect the end 14 of the pipe 10.

The segment 210 may have any shape such as a quadrangle, a circle, or the like, provided that it has a shape capable of wrapping the periphery of the pipe 10. However, it is preferable that the segment 210 ).

The segment 210 includes a space 214 formed by a pair of keys 212 protruding inward in the radial direction and the pair of keys 212 being spaced apart from each other by a space 214 .

Here, the pair of keys 212 are coupled to the respective circumferential grooves 12 of the two pipes 10, respectively. Further, the space 214 may further include a sealing member covering the two pipes 10. A certain distance is provided between the end portions 14 of the two pipes 10 connected by the coupling 200, and a certain distance is referred to as a gap 16 (see FIG. 4). The gap (16) allows the pressurized fluid to apply hydraulic pressure to the sealing member, increases the adhesion between the two pipes (10) by means of a hydraulic seal member, Provides flexibility.

The key 212 includes an opposing outer surface 212c and an inner surface 212a and an intermediate surface 212b located between the outer surface 212c and the inner surface 212a. The inner surface 212a is one side of the space 214.

4, the inner surface 212a may be provided perpendicularly to the center of the pipe 10 and may be in contact with the second side surface 12c of the groove 12 to fix the pipe 10 .

On the other hand, when the second side face 12c of the groove 12 is inclined, that is, when the length of the bottom face 12b of the groove 12 becomes narrower toward the center of the pipe 10, A corner portion where the surface 212a and the intermediate surface 212b meet is obliquely cast or formed obliquely with the oblique shape of the second side face 12c or the oblique shape of the second side face 12c And may be molded or provided with a predetermined space 214 so as not to be contacted. This is to prevent the edge from coming into contact with the second side surface 12c to cause a gap between the intermediate surface 212b and the bottom surface 12b of the groove 12. [

The intermediate surface 212b is in contact with the bottom surface 12b of the groove 12 to apply force in the direction of the center of the pipe 10 and fix the pipe 10. [ It is preferable that the intermediate surface 212b is seated so as not to come off the bottom surface 12b and the length of the intermediate surface 212b is preferably smaller than the length of the bottom surface 12b. When the first side surface 12a and the second side surface 12c of the groove 12 are inclined, the center surface 12b of the groove 12 in the groove 12, which is parallel to the central axis of the pipe 10, 212b.

The outer surface 212c further includes a window 216 that is recessed from the outer surface 212c toward the inner surface 212a, wherein the recess can be made through cutting or casting. The length of the intermediate surface 212b of the window 216 is also characterized by being shorter than the length of the intermediate surface 212b without the window 216. [ This is to visually confirm through the window 216 where the intermediate surface 212b is seated on the bottom surface 12b.

The maximum height of the window 216 is longer than the depth of the groove 12 so that the first side face 12a and a part of the bottom face 12b can be visually recognized.

3, in the case of the coupling 200 provided on the pipe 10, the window 216 may be provided on each of the outer surfaces 212c of the pair of keys 212 The outer surface 212c viewed by the operator may be changed according to the working environment so that the user can view the portion of the first side surface 12a and the bottom surface 12b through the window 216 at any position. to be.

One or more windows 216 may be provided on the outer surface 212c to allow the operator to view the coupling 200 installed in various working environments from the first surface 212c through the window 216, So that the side surface 12a and a part of the bottom surface 12b can be seen.

The coupling 200 having the window 216 according to the present invention can be visually checked whether the intermediate surface 212b is in contact with the bottom surface 12b of the groove 12 through the window 216 And identifies a portion of the first side 12a and the bottom 12b to ensure the presence of a gap 16 between the pipes 10.

For example, when the first side face 12a is inclined, the boundary between the first side face 12a and the bottom face 12b is unclear, so that it is not easy to fasten the coupling.

When the intermediate surface 212b is properly seated in the bottom surface 12b, the oblique portion of the first side surface 212b ends when viewed through the window 216 and the bottom surface 12b starts And the intermediate surface 212b is in contact with the intermediate surface 212b.

However, when the intermediate surface 212b contacts the oblique portion of the first side surface 212b, the first side surface 212b contacts the intermediate surface 212b when viewed through the window 216, It can be confirmed that an oblique portion of the intermediate surface 212b is continued and that there is a gap between the intermediate surface 212b and the bottom surface 12b. Therefore, it can be confirmed that the coupling 200 is not properly seated.

4, the shape of the window 216 does not extend through the inner surface 212a but extends toward the inner surface 212a to have a predetermined depth, including the intermediate surface 212b It does not matter which shape it has when it sinks. For example, it may be rectangular, arcuate, etc., and preferably has an arch shape in order to prevent stress concentration on the curved surface inside the recessed window 216 and to maintain the durability of the segment 210.

Referring to FIG. 2, a joint may be further provided at the end of the segment 210 to increase the coupling force between the segments 210. In the coupling 200 of the present invention, the joint may have a convex portion 220a on one side and a concave portion 220a on the other side, and the other may be concave or convex, concave, convex or concave, It is preferable to have a joint portion 220b.

A fixing part 230 formed at the end of the segment 210 in a direction opposite to the center of the pipe 10 and a bolt 230 formed in the fixing part 230 and coupled with another segment 210 And a fastening frame 232 through which the fasteners 240 are inserted. The bolts 240 are fixed by the fastening molds 232 and fasten the nuts 242 to the bolts 240 passing through the fastening molds 232 of the other segments. When the nut 242 is tightened with a predetermined torque, the key 212 of the coupling 200 is engaged with the groove 12 of the pipe 10 to fix the pipe 10.

 Meanwhile, the segment 210 may be formed of a stainless steel casting. The segment 210 may be made of any material that can withstand the internal pressure and external force of the pipe 10 by connecting the pipe 10. The material of the segment 210 is generally made of the same material as the material of the pipe 10 in order to prevent corrosion of the pipe 10 and the segment 210 and to prevent destruction of the concentricity of the pipe 10 due to the difference in strength I write.

In another embodiment of the present invention, the pipe 10 connected to the coupling 200 has a circumferential groove 12 at a position spaced apart from the end 14. The groove 12 has a first side 12a far from the end 14 of the pipe 10 and a second side 12c close to the end 14 of the pipe 10, And a bottom surface 12b between the first side surface 12c and the second side surface 12c.

The coupling 200 includes a pair of keys 212 coupled with the groove 12 of the pipe 10 and a predetermined space 214 provided between the pair of keys 212, And a window 216 that is recessed inwardly from the outer surface of the key 212 to view a portion of the first side surface 12a and a portion of the bottom surface 12b.

The side surface inside the window 216 has a curved surface or a window wall surface 216a having a plurality of surfaces.

Wherein the length from the window wall surface 216a to the inner surface 212a is less than the length from the outer surface 212c to the inner surface 212a.

In another embodiment of the present invention, the circumferential groove 12 at a location spaced from the end 14 of the pipe 10 has a second side 12c near the end 14 of the pipe 10, A first side 12a remote from the end 14 of the pipe 10 and a bottom 12b between the first side 12a and the second side 12c.

The coupling 200 for connecting the two pipes 10 includes a pair of keys 212 that engage with the grooves 12 of the pipe 10 and a pair of keys 212 And a predetermined space 214 that is formed by a predetermined space.

The key 212 is connected to the intermediate surface 212b contacting the bottom surface 12b of the circumferential groove 12 of the pipe 10 and the second surface 12c And an outer surface 212c connected at the intermediate surface 212b and partially in contact with the first side surface 12a.

The outer surface 212c may include a window 216 recessed in the direction of the inner surface 212a so that the length of the outer surface 212c in the window 216 may be greater than the length of the outer surface 212c of the window 216, The length of the outer surface 212c of the window 216 is shorter than the length of the outer surface 212c without the window 216. In other words, the length of the outer surface 212c of the window 216 is shorter than the length of the outer surface 212c It says.

Characterized in that a part of the first side face (12a) of the groove (12) and a part of the bottom face (12b) of the groove (12) are visible through the recessed window (216).

The foregoing detailed description is illustrative of the present invention. In addition, the foregoing is intended to illustrate and explain the preferred embodiments of the present invention, and the present invention may be used in various other combinations, modifications, and environments. That is, it is possible to make changes or modifications within the scope of the concept of the invention disclosed in this specification, within the scope of the disclosure, and / or within the skill and knowledge of the art. The embodiments described herein are intended to illustrate the best mode for implementing the technical idea of the present invention and various modifications required for specific applications and uses of the present invention are also possible. Accordingly, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. It is also to be understood that the appended claims are intended to cover such other embodiments.

10: Pipe 12: Home
12a: first side 12b: bottom surface
12c: second side 14: end
16: gap 200: coupling
210: segment 212: key
212a: inner surface 212b: intermediate surface
212c: outer surface 214: space
216: window 216a: window wall
220a: convex portion 220b: concave portion
230:

Claims (8)

And a bottom surface which is provided at a position spaced from the end of the pipe and which connects the first side far from the end of the pipe, the second side near the end of the pipe, and the bottom surface connecting the first side and the second side. A coupling for connecting end portions of two pipes having grooves,
The coupling including a plurality of segments surrounding the perimeter of the two pipes,
Each of the segments having a pair of keys protruding radially inwardly and engaged with the circumferential grooves of the pipe,
Wherein the pair of keys are spaced apart from each other to form a space,
The key includes an outer surface and an inner surface facing each other and an intermediate surface in contact with the bottom surface and located between the outer surface and the inner surface,
Further comprising a window that is not penetrated from the outer surface toward the inner surface but is recessed to a predetermined depth,
Wherein the inside of the window includes a wall surface having a plurality of surfaces,
The length of the intermediate surface is shorter than the portion where the window is not provided, so that the first side surface and the bottom surface can be seen through the window when the coupling is engaged,
Wherein the maximum height of the window is greater than the depth of the circumferential groove of the pipe so that a portion of the first side surface and a portion of the bottom surface can be seen through the window when the coupling is engaged. delete The method according to claim 1,
Wherein the window is provided on an outer surface of each of the pair of keys of the segment. The method according to claim 1,
Wherein the window is formed with one or a plurality of windows on the outer surface of each of the pair of keys of the segment. The method according to claim 1,
Wherein one end of the segment has a convex portion and the other of the segments has a concave portion at an end of the segment. 6. The method of claim 5,
And a fastening part formed at the end of the segment and extending in a direction opposite to the center of the pipe, and a fastening part formed in the fastening part and through which a bolt for coupling with another segment passes. The method according to claim 1,
Wherein the segment is formed of a stainless steel casting. A coupling for connecting two pipes having a circumferential groove at a position spaced apart from an end of the pipe,
The coupling including a plurality of segments covering the perimeter of the pipe,
Wherein each of the segments includes a pair of keys protruding toward the center of the pipe and a predetermined space between the pair of keys,
The key having an intermediate surface in contact with a bottom surface of the groove of the pipe, an outer surface connected to one end of the intermediate surface and connected to an outer portion of the segment, and an inner surface connected to the other end of the intermediate surface, And an inner surface connected to the inner surface,
Wherein the outer surface includes a window that does not penetrate the inner surface from the outer surface to the inner surface but is recessed to a predetermined depth,
Wherein the window is provided with a wall surface parallel to the outer surface,
Wherein a length from the wall surface to the inner surface is shorter than a length from the outer surface to the inner surface so that the bottom surface and the side surface of the pipe groove can be viewed through the window, Is longer than the depth of the circumferential groove of the pipe,
Wherein the window has one or more on the outer surface of each of the pair of keys of the segment.
KR20140056649A 2014-05-12 2014-05-12 Coupling KR101488337B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101758599B1 (en) 2017-02-03 2017-07-17 피피아이평화 주식회사 Device for connecting pipe and pipe joint
KR101775642B1 (en) 2017-02-03 2017-09-07 피피아이평화 주식회사 Method for connecting pipe and pipe joint and structure thereof
EP3408573A4 (en) * 2016-01-26 2019-06-19 Victaulic Company Pipe element having wedging groove
KR102033757B1 (en) * 2018-12-13 2019-10-17 주식회사 뉴아세아조인트 Coupling assembly for connecting pipes and manufacturing method of the same
WO2020235869A1 (en) * 2019-05-23 2020-11-26 주식회사 뉴아세아조인트 Sprinkler system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060135838A (en) * 2004-03-26 2006-12-29 빅톨릭 컴패니 Pipe coupling having keys with camming surfaces
KR20070012723A (en) * 2004-05-14 2007-01-26 빅톨릭 컴패니 Deformable mechanical pipe coupling
KR100746968B1 (en) * 2005-11-14 2007-08-07 연우지에스티 주식회사 Coupling
KR20120129903A (en) * 2010-02-17 2012-11-28 빅톨릭 컴패니 Coupling having angularly oriented key surfaces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060135838A (en) * 2004-03-26 2006-12-29 빅톨릭 컴패니 Pipe coupling having keys with camming surfaces
KR20070012723A (en) * 2004-05-14 2007-01-26 빅톨릭 컴패니 Deformable mechanical pipe coupling
KR100746968B1 (en) * 2005-11-14 2007-08-07 연우지에스티 주식회사 Coupling
KR20120129903A (en) * 2010-02-17 2012-11-28 빅톨릭 컴패니 Coupling having angularly oriented key surfaces

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3408573A4 (en) * 2016-01-26 2019-06-19 Victaulic Company Pipe element having wedging groove
US10550971B2 (en) 2016-01-26 2020-02-04 Victaulic Company Pipe element having wedging groove
EP3885621A1 (en) * 2016-01-26 2021-09-29 Victaulic Company Combination comprising a coupling and a pipe element having wedging groove
EP4191112A1 (en) * 2016-01-26 2023-06-07 Victaulic Company Combination comprising a coupling and a pipe element having wedging groove
US11725759B2 (en) 2016-01-26 2023-08-15 Victaulic Company Pipe element having wedging groove
KR101758599B1 (en) 2017-02-03 2017-07-17 피피아이평화 주식회사 Device for connecting pipe and pipe joint
KR101775642B1 (en) 2017-02-03 2017-09-07 피피아이평화 주식회사 Method for connecting pipe and pipe joint and structure thereof
KR102033757B1 (en) * 2018-12-13 2019-10-17 주식회사 뉴아세아조인트 Coupling assembly for connecting pipes and manufacturing method of the same
WO2020235869A1 (en) * 2019-05-23 2020-11-26 주식회사 뉴아세아조인트 Sprinkler system
CN113840636A (en) * 2019-05-23 2021-12-24 新亚联合株式会社 Sprinkler system

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