WO2020045749A1

WO2020045749A1 - Pipe coupling allowing checking of fastening state

Info

Publication number: WO2020045749A1
Application number: PCT/KR2018/015158
Authority: WO
Inventors: 김덕모; 김주환
Original assignee: 주식회사 코리아조인트
Priority date: 2018-08-30
Filing date: 2018-12-03
Publication date: 2020-03-05
Also published as: KR20200025564A; KR102100634B1

Abstract

The purpose of the present invention is to provide a pipe coupling with which an assembly operation for connecting two pipes can be rapidly and easily performed. To this end, the present invention discloses a pipe coupling which comprises: a first member which comprises a body formed in a semi-annular shape to surround a portion of a connection part of each of two pipes and has a support groove formed inside the inner circumference thereof for supporting an annular sealing member, flanges which are integrally formed at the end portion edges of the body and have vertically extending through-holes therein and seating-grooves formed around the through-holes, and cutting blades integrally formed with edges of the flanges; a second member which is formed to have the same shape as the first member, is disposed symmetrically below the first member, and is coupled to the first member when bolts and nuts are fastened; and identification members which are inserted between the mutually facing flanges of the first member and the second member, and of which a portion protruding outward from the flanges is cut by the cutting blades when the first member and the second member are coupled by inserting the bolts into the through-holes of the first and second members and tightening the nuts.

Description

Pipe Couplings for Tightening

The present invention relates to a pipe coupling used to connect two pipes, and more particularly, the assembly work for the connection of two pipes can be made quickly and easily, and the assembly state can be maintained stably and securely. Relates to a pipe coupling.

In general, pipe couplings for connecting pipes and pipes are widely used throughout the industry, such as various industrial equipment and plumbing equipment for building structures.

These pipe couplings are secured by tightening bolts and nuts so that even if the pipes are shocked or fluctuate due to changes in the pressure of the fluid flowing inside, the bolts and nuts are securely tightened to prevent disconnection between the pipes. Must be sealed.

1 shows an example of a pipe coupling according to the prior art, and as shown, a semicircular space for accommodating opposite ends of pipes 4 and 5 having grooves 3 formed on the outer periphery ( 6) and a pair of semicircular rings each formed at both side edges of the semicircular space 6 and having fixing jaws 8 and 9 which can be fitted into the grooves 3 of the pipes 4 and 5, respectively. An elastic sealing ring 7 made of a coupling segment 1, 2 and an elastic material such as an EPDM elastomer and fitted in a semicircular space 6 for sealing between the ends of the pipes 4, 5, It consists of fastening means 10 for fastening two semicircular coupling segments 1, 2 together with pipes 4, 5.

That is, the conventional pipe coupling is elastically positioned in the semicircular space 6 of the semicircular coupling segments 1, 2 and positioned at the outer periphery of the ends of the two pipes 4, 5 by tightening the fixing means 10. The sealing ring 7 is compressed to seal between the ends of the pipes 4 and 5, and at the same time, the fixing jaw 8 is fitted into the groove 3 of the two pipes 4 and 5 so that the two pipes ( 4, 5).

However, such a pipe coupling is a mechanical characteristic of fastening a pair of semi-circular coupling segments (1, 2) to a pipe by tightening bolts and nuts. When high pressure or vibration occurs inside the pipe, the fastening state between the semi-circular coupling segments 1 and 2 is gradually released, causing a large accident such as leakage or pipe detachment.

In order to solve the problems of the conventional pipe coupling, a pipe coupling has been developed that can easily and clearly determine whether the bolt and nut is firmly fastened, which is the applicant's Patent Publication No. 10-1810063 It is disclosed in the arc (patent document 1).

That is, Patent Literature 1 forms a cut portion integrally with the flange portions facing each other when the semi-circular coupling segments (first and second members) are coupled to each other, and inserts an identification sheet therebetween to tighten the bolts and nuts. When the gap is within a certain range, the cutting unit cuts out the identification sheet so that the semicircular coupling segments are firmly fastened with the bolts and nuts completely tightened.

However, this means that when joining the semicircular coupling segments for the connection of two pipes, the bolts and nuts are tightened or the operator is placed on the flange part of the semicircular coupling segment located below. The assembly work is very difficult and inconvenient, because it is necessary to insert the bolt and tighten the nut after opposing the semicircular coupling segment located at the bottom with one hand contact with the flange part of the semicircular coupling segments. There is a limit to use.

In addition, in order to stably insert the identification portion to the cutting portion slightly protruded from the flange portion, there is an inconvenience in that the uneven portion of the identification sheet must be positioned to correspond to the cutting portion.

Here, the above-described background or the prior art is merely for helping the present inventor to understand the technical meaning of the present invention as information possessed or acquired in the process of deriving the present invention, and the technology to which the present invention belongs before the application of the present invention. It does not mean that the technology is widely known in the field.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) KR 10-1810063 B1 (Dec. 12, 2017)

(Patent Document 2) KR 20-0391294 Y1 (2005.07.21)

(Patent Document 3) KR 10-0536822 B1 (2005.12.08)

(Patent Document 4) KR 10-1234108 B1 (2012.02.12)

(Patent Document 5) KR 10-1284635 B1 (2013.07.04)

(Patent Document 6) KR 10-0193346 B1 (1999.02.03)

(Patent Document 7) JP P2009-222107 A (2009.10.1)

Therefore, the present inventors devised in view of solving the limitations and problems of the existing pipe coupling while comprehensively considering the above-described matters, and the assembling work for the connection of the two pipes can be made quickly and easily, and also in the assembled state. To develop a new structure of pipe coupling that can not only maintain the stiffness but also make it easier and easier to break the member to visually check the condition when the bolt and nut are fully tightened. While working diligently, the present invention was invented as a result.

Therefore, the technical problem and object to be solved by the present invention is to provide a pipe coupling that allows the assembly work for the connection of the two pipes can be made quickly and easily.

Another technical problem and object to be solved by the present invention is to provide a pipe coupling that can be maintained firmly assembled.

Another technical problem and object to be solved by the present invention is to provide a pipe coupling that can more easily break the member for accurately confirming the complete assembly state.

The technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects not mentioned will be clearly understood by those skilled in the art from the following description.

Specific means according to an embodiment of the present invention for achieving the object as described above and to solve the technical problem, is formed in a semi-circular shape so as to surround a part of the connection portion of the two pipes, an annular sealing member in the inner circumference A support groove is formed to support the body, and a body having a tenon fitted into grooves formed at outer periphery of the two pipes facing each other on both side edges of the support groove is formed, and integrally at both end edges of the body. And a first member including a flange having a through hole and a bolt hole penetrating up and down therein, and having a seating groove formed around the through hole, and a cutting blade integrally formed at an edge of the flange. A second member formed in the same shape and disposed point-symmetrically under the first member to be coupled to the first member when the bolt and the nut are fastened; And a threaded portion of the bolt inserted between the flanges facing each other of the first member and the second member, the threaded portion of the bolt being inserted into the through hole and the bolt hole of the first and second members, and the nut being tightened. When the second member is coupled to provide a pipe coupling, characterized in that it comprises an identification member that includes a part that protrudes out of the flange by the cutting blade.

Thus, the present invention does not need to tighten the bolt and nut in a state in which the identification member is in close contact with the flange can be quickly and easily assembled for the connection of the two pipes.

In a preferred embodiment of the present invention, the identification member includes a locking portion which is partially fitted into the seating groove of the flange by a press-fit method, and an inserting portion which is integrally formed to protrude on one surface of the locking portion and fitted into the through-hole by a press-fit method. By forming a bolt hole through the engaging portion and the insertion portion (slot hole) formed through the other side and the other side of the engaging portion protruding integrally, and comprises a break formed with a slit in the center portion Since the identification member does not need to be tightened to the flange with one hand, the assembly work for connecting the two pipes can be made more quickly and easily.

According to a preferred embodiment of the present invention, the identification member has a plurality of contact protrusions formed at regular intervals on the outer circumference of the insertion portion, and is hollowed to guide the threaded portion of the bolt into the bolt hole to facilitate insertion of the bolt portion into the hole. The guide portion may protrude integrally with the outer end of the insertion portion.

In a preferred embodiment of the present invention, irregularities are formed on opposite surfaces around the bolt hole of the nut and the flange, respectively, so that the nut can be prevented from loosening or loosening due to external force, thereby further tightening and assembling. It can keep more firm.

In a preferred embodiment of the present invention, the identification member cuts the two cutting blades cross each other, and each of the cutting blades formed on one flange of both sides of the body and the cutting blades formed on the other flange alternately cross each other. The cutting blade is formed in a corresponding shape or each cutting blade is formed by dividing each pair into a pair of corresponding shapes, so that the identification member can be broken more easily and easily, so that the bolts and nuts are completely tightened. Can be.

In a preferred embodiment of the present invention, a stopper and a stopper hole are formed to correspond to each other on the flange faces of the first member and the second member facing each other, thereby preventing the first member and the second member from being misaligned. The wedge for pressing and holding the sealing member is integrally formed on the inner wall of the support groove so that the sealing member can be more effectively compressed when the bolt and the nut are tightened.

Embodiments of the present invention, which have a means and a configuration for achieving the above object and the technical problem, the first member is inserted into the flange of the second member in a force-fitting manner to maintain the engagement state of the first member Unlike the conventional method, it is not necessary for the operator to work with the identification member attached to the flange with one hand in the process of inserting the bolt and tightening the nut, so that the assembly work for connecting the two pipes can be performed quickly, easily and efficiently. Can be.

Therefore, when assembling work connecting two pipes, it is possible to improve work efficiency and increase productivity by improving ease of assembly and convenience.

Further, since the cutting blades formed on one flange of both sides of the body and the cutting blades formed on the other flange intersect with each other, the cutting blades are divided into a pair of corresponding shapes so that the first member and the second The two blades intersect when the member is fully engaged, and the identification member can be easily broken to accurately identify the state where the bolt and nut are fully tightened.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is an exemplary view showing a pipe coupling according to the prior art.

2 is an exploded perspective view illustrating a pipe coupling according to an embodiment of the present invention.

Figure 3 is a cross-sectional view showing a coupling state of the pipe coupling according to an embodiment of the present invention.

4 is a perspective view showing an identification member of the components constituting the pipe coupling according to an embodiment of the present invention.

5 is a perspective view showing another form of the identification member of the components constituting the pipe coupling according to an embodiment of the present invention.

6 is a perspective view showing another form of the identification member of the components constituting the pipe coupling according to an embodiment of the present invention.

7 is an enlarged cross-sectional view of a local portion of a pipe coupling according to another embodiment of the present invention.

8 is an exploded perspective view illustrating first and second members of a pipe coupling component according to another embodiment of the present invention.

9 is a partially enlarged cross-sectional view illustrating a coupling state between first and second members of a pipe coupling component according to another embodiment of the present invention.

[Description of the code]

11: first member 12: second member

13: body 14: support groove

15: ledger 16: flange

17: through hole 18: bolt hole

19: Settlement groove 20: Cutting blade

21: unevenness 22: stopper

23: stopper hole 24: wedge

30: identification member 31: locking portion

32: insertion part 33: long hole

34: break 35: slit

36: contact protrusion 37: guide

40: sealing member 50: bolt

60: nut 61: irregularities

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms to be described below are defined in consideration of functions in the present invention, which clearly indicates that the concept is to be interpreted as a concept consistent with the technical idea of the present invention and commonly used or commonly recognized in the art.

In addition, when it is determined that the detailed description of the known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The accompanying drawings show an exaggerated or simplified part of the description and explanation of the structure and operation of the technology for convenience and clarity, and it is understood that each component does not exactly match the actual size and shape.

In addition, the term and / or as used herein means a combination of a plurality of related items or any item of a plurality of related items, and when a part includes a certain component, this is a particularly opposite description. Unless otherwise indicated, it does not exclude other components, which means that other components may be further included.

That is, it means that there is a feature, number, steps, actions, components, parts, or a combination thereof described in the present specification, one or more other features or numbers, step action components, parts or a combination thereof It should be understood that they do not exclude the presence or the possibility of adding them.

In addition, the terms "unit" and "unit" mean a module form that serves as a unit or a role for processing at least one function or a certain operation desired in a system, which is hardware or software or a combination of hardware and software. It can be implemented as a device or an assembly capable of performing independent operations or the like through means.

In addition, terms such as top, bottom, top, bottom, or top, bottom, top, bottom, and the like are used for convenience of differentiating relative positions of each component. For example, the upper part of the figure may be named and referred to as the lower part of the lower part.

In addition, terms such as first and second may be used to describe various components. That is, terms such as first and second may be used only to distinguish one component from another component. For example, the first component may be referred to as the second component without departing from the scope of the present invention, and the second component may also be referred to as the first component.

Example 1

As shown in FIG. 2 to FIG. 4, the main configuration of the pipe coupling according to the embodiment of the present invention includes a first member 11, a second member 12, and an identification member 30. .

The first and

second members

11 and 12 are fastened to the bolt 50 and the nut 60 in a state where they are point-symmetrically disposed between the abutting portions of the two pipes or the end portions adjacent to each other, that is, the connecting portion. It is formed in the same shape with each other so that they can be coupled to each other by the bonding force and the pressing force generated during.

That is, the first and

second members

11 and 12 are formed of a metal material to wrap and fix the outer circumferences of the connecting portions of the two pipes in a male and female coupling manner.

Each of the first and

second members

11 and 12 includes a body 13, a flange 16, and a cutting blade 20.

The body 13 is formed in a semi-circular shape so as to surround a part of the connection part of the two pipes, and an inner annular sealing member interposed inside the inner circumference to seal the connection parts of the two pipes without gaps and prevent leakage of the fluid ( Support grooves 14 are formed to support 40, and both sides of the inner periphery, i.e., both side edges of the support grooves 14, are inserted into grooves respectively formed at the outer periphery of the end portions of the two pipes facing each other. (15) is formed.

The flange 16 is integrally formed as a lug on both edges of the body 13, and a through hole 17 and a bolt hole 18 are formed in the inside thereof.

That is, the through hole 17 is formed to couple a part of the identification member 30 by a press-fit method, and the bolt hole 18 has the first member 11 and the second member 12 of the two pipes. It is formed so that it can be fastened with the bolt 50 and the nut 60 in the state which wraps the part which abuts together.

And when the first member 11 and the second member 12 are disposed symmetrically with each other, the seating for coupling the identification member 30 around the through hole 17 on the surface of the flanges 16 facing each other The groove 19 is formed.

In addition, a stopper for preventing the first member 11 and the second member 12 from being misaligned or relatively moved on the flange 16 faces of the first member 11 and the second member 12 facing each other. 22 and the stopper hole 23 are formed to correspond to each other in the shape of a male and female, and the inner wall of the support groove 14 to more effectively compress the sealing member 40 when fastening the bolt 50 and the nut 60 At least one protruding wedge 24 is formed to be pressed to prevent twisting in the support groove 14.

Here, the bolt hole 18 is a slot hole to facilitate the fastening of the nut 60 while conveniently fitting the screw portion of the bolt 50 at the time of coupling the first member 11 and the second member 12. It is preferable that it is formed in a shape.

In addition, the through hole 17 is preferably formed to be slightly larger than the inner diameter of the bolt hole 18.

On the other hand, in order to prevent the nut 60 from being loosened due to an external force and loosening or loosening, the opposite surface around the bolt hole 18 of the nut 60 and the flange 16 increases the frictional force and prevents slippage.

Irregularities

21 and 61 are formed, respectively.

The cutting blade 20 has a predetermined range when the bolt 50 and the nut 60 are fastened together with the first member 11 and the second member 12 wrapped together with the two pipes in contact with each other. When it is within, it is integrally formed at the edge of the flange 16 to cut the break 34 of the identification member 30.

That is, when the first member 11 and the second member 12 are completely coupled, the cutting blade 20 cuts the break 34 of the identification member 30 while crossing each other with the cutting blade 20. Towards its end, the width becomes narrower or sharper.

The identification member 30 is formed to be sandwiched between the flanges 16 of the first member 11 and the second member 12 facing each other, and the first and

second members

11 and 12 Cutting blade 20 when inserting the threaded portion of the bolt 50 into the through hole 17 and the bolt hole 18 and tightening the nut 60 to join the first member 11 and the second member 12. The portion which protrudes out of the flange 16 by this is formed so that it may be broken.

In addition, the identification member 30 has a locking portion 31 in which a part is fitted in a seating groove 19 of the flange by a press-fit method, and one side of the locking portion 31 is elastically deformed by elasticity and penetrates therethrough. The insertion part 32 fitted in the hole 17 in a press-fitting manner is integrally formed to protrude, so that the bolt 50 can be inserted, that is, the through hole of the first and

second members

11 and 12. 17 and the long hole 33 which penetrates the locking part 31 and the insertion part 32 up and down so that the screw part of the bolt 50 may be inserted into the bolt hole 18, and the locking part 31 is formed. The other side of the protruding portion 34 is formed integrally broken by the cutting blade (20).

In addition, a slit 35 is formed at the center portion of the break 34 so that the cutting blades 20 can be easily broken while being cut, and the thickness is relatively thinner than the catching portion 31. have.

Here, the identification member 30 is a nylon resin, polyester resin, plastic (PE, PP, PVC, PS, ABS, AS, MA, PVAL, PET) resin having a slight elasticity so that elastic deformation occurs when subjected to external force Injection molding can be carried out with synthetic resins such as these.

In addition, the identification member 30 may check the state in which the bolt 50 and the nut 60 are completely tightened more accurately and effectively by different colors from the first member 11 and the second member 12.

In the pipe coupling according to the embodiment of the present invention configured as described above, the first member 11 and the second member 12 are pulled toward each other as the bolt 50 and the nut 60 are tightened to close each other. Pressure is naturally applied to the sealing member 40, which causes the sealing member 40 to deform to prevent a gap between the two pipes.

At this time, since the cutting blades 20 intersect and break the pressing portion 34 of the identification member 30, it is quick and clear to the naked eye whether the bolt 50 and the nut 60 are fully engaged without being biased to one side. You can check it.

In addition, since the identification member 30 is fitted to the flange 16 of the second member (or the first member) in a force-fitting manner and maintains its engagement state, the bolt 50 is inserted after facing the first member 11. Unlike the related art, when tightening the nut 60, the operator does not need to work with the identification member 30 in close contact with the flange 16 with one hand, so the assembly work for connecting the two pipes is quick, easy and efficient. Can be made.

That is, a part of the engaging portion 31 of the identification member 30 is fitted into the seating groove 19 of the flange 16 in a press-fitting manner, and at the same time the insertion portion 32 is elastically deformed by elasticity and the through hole ( Since it is fitted in the press-fit method 17, it is possible to stably maintain the state coupled to the first member 11 or the second member 12 before the bolt 50 is inserted and the nut 60 is tightened.

In addition, due to the coupling force of the identification member 30, the flow of the first member 11 and the second member 12 is minimized, and the sealing member 40 is pressurized more uniformly so that a higher pressure can be obtained without leakage of the fluid. Can withstand

On the other hand, as shown in Figure 5 the outer periphery of the insertion portion 32 of the identification member (30-1) is a close contact protrusion to maintain a more flexible, elastic and stable fit in the through hole 17 of the flange ( 36 may be formed at regular intervals.

In addition, as shown in FIGS. 6 and 7, the free end of the insertion portion 32 of the identification member 30-2 is inserted into the bolt hole 18 to insert the screw portion of the bolt 50 into the long hole 33. Hollow guide portion 37 for guiding easily may be integrally formed to protrude.

That is, the guide part 37 is fitted as the length of the insertion part 32 extends to the inner periphery of the bolt hole 18, and since the hollow communicates with the long hole 33, the threaded part of the bolt 50 is the bolt hole ( 18) If the long hole 33 of the insertion portion 32 is not exactly in line with the bolt hole 18 when it is inserted into it, contact interference with the free end of the insertion portion 32 is not convenient and does not enter easily. Can be solved.

Meanwhile, as shown in FIGS. 8 and 9, the cutting blade 20 formed on one flange 16 of both sides of the body 13 and the cutting blade 20 formed on the other flange 16 cross each other. While being formed to cut the break 34 of the identification member 30, and the cutting blades 20 are alternately intersected with each other, each of the cutting blades 20 is bisected into a pair of the corresponding shape, respectively Can be formed.

That is, the cutting blade 20 can more easily and easily break the break 34 of the identification member 30 by the action of the two blades intersecting each other, so that the bolt 50 and the nut 60 are completely The tightness can be checked accurately.

Here, the cutting blades 20 may be formed in one shape corresponding to each other so that the cutting blades 20 alternately cross each other as shown in FIG. 9.

On the other hand, the present invention is not limited by the above-described embodiment and the accompanying drawings, of course, it can be variously modified and applied in various ways that are not illustrated within the scope without departing from the spirit of the present invention.

For example, the flange 16 is illustrated as being symmetrically formed at both end edges of the body 13, but is not limited thereto and is formed only at one end edge of the body 13, and the other end (opposite end) is formed. The knuckle may be formed at the partial edge so as to be connected to the other body 13 by hinged joints.

In addition, it is apparent to those skilled in the art that the present invention may be widely applied by changing each component and equivalent examples.

Therefore, the contents related to the modification and application of the technical features of the present invention should be interpreted as being included in the technical spirit and scope of the present invention.

Claims

It is formed in a semi-circular shape so as to surround a part of the connection portion of the two pipes, the body is formed with a support groove for supporting the annular sealing member on the inner side of the inner periphery, integrally formed at the edges of both ends of the body, the inside up and down A first member including a pair of flanges through which the through hole and the bolt hole are opened and a seating groove is formed around the through hole, and a cutting blade integrally formed at an edge of the flanges;

A second member formed in the same shape as the first member and disposed point-symmetrically under the first member and coupled to the first member when the bolt and the nut are fastened; And

The screw member of the bolt is inserted between the flanges facing each other of the first member and the second member, and the screw part of the bolt is inserted into the through hole and the bolt hole of the first and second members. An identification member which breaks a portion protruding to the outside of the flange by the cutting blade when joining a second member;

Pipe coupling comprising a.
The method of claim 1,

The identification member,

A catching part to be fitted into the seating groove of the flange by a press-fit method;

An insertion part protruding integrally on one surface of the locking part and fitted into the through hole by a press-fit method;

A long hole formed through the locking portion and the insertion portion to insert a bolt; And

A break portion integrally formed on the other side of the catching portion, a slit is formed in the center portion thereof, and broken by the cutting blade;

Pipe coupling comprising a.
The method of claim 2,

A plurality of contact protrusions are formed at regular intervals on the outer circumference of the insert,

And a hollow guide portion integrally protruded into the free end of the insertion portion, the hollow guide portion being inserted into the bolt hole to guide the screw portion of the bolt into the long hole.
The method of claim 1,

And a concave-convex formed on opposite surfaces around the bolt hole of the flange and the flange to prevent the nut from being loosened or loosened by external force.
The method of claim 1,

The identification member cuts the two cutting blades cross each other, and each cutting blade has a corresponding shape such that the cutting blades formed on one flange of both sides of the body and the cutting blades formed on the other flange alternately cross each other. A pipe coupling formed or each cutting edge formed by dividing each into a pair of corresponding shapes.
The method of claim 1,

A stopper and a stopper hole are formed to correspond to each other on the flange faces of the first member and the second member facing each other to prevent the first member and the second member from being misaligned.

The wedge for pressing and holding the sealing member on the inner wall of the support groove is formed integrally projecting,

A pipe coupling is formed in the grooves that are fitted into the grooves formed on the outer periphery of the end of the two pipes facing each other on both side edges of the support groove.