KR101872361B1

KR101872361B1 - Pipe Coupler

Info

Publication number: KR101872361B1
Application number: KR1020160184257A
Authority: KR
Inventors: 손인수; 김정록; 오빈
Original assignee: 동의대학교 산학협력단
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2018-06-28

Abstract

The present invention relates to a pipe coupler. According to the present invention, two fastening rings are spirally coupled with the outer surface of a coupler main body having a cylindrical shape with both ends open, and a pipe inserted through both ends of the coupler main body is pressed and connected by the fastening rings. During separation, the fastening ring is turned the other way around for an inward movement of the coupler main body so that the pipe can be easily separated and fixing thereof is easily released. The pipe coupler according to the present invention includes: a coupler main body having threads formed on an outer peripheral surface thereof; two fastening rings having inner peripheral surfaces in which the threads are formed for spiral coupling with the threads of the coupler main body and moving in an axial direction while rotating with respect to the coupler main body; and a coupling portion including a plurality of curved tightening pieces arranged at a predetermined interval in a circumferential direction in both end portions of the coupler main body to form a pipe insertion space, having an outer surface provided with a thread continued from the thread of the coupler main body, and coming into close contact with the outer surface of the pipe while being tightened inwards in the radial direction by each of the fastening ring.

Description

[0001] PIPE COUPLER [0002]

The present invention relates to a coupling device for connecting two pipes. More specifically, the present invention relates to a coupling device for coupling two pipes by connecting two coupling rings on the outer surface of a cylindrical coupler main body, And the pipe ring is rotated in the opposite direction to move to the inside of the main body of the coupler, so that the fixed state of the pipe can be easily released and separated.

In general, the connection between piping and piping such as building water pipes, fire-extinguishing piping materials, industrial piping materials, household appliances such as washing machines and air conditioners, etc. is generally welded by welding. However, Is also widely used.

However, most of the conventional pipe connectors and couplers have disadvantages that are incapable of recycling, and most of them require special tools for the compression of pipes and pipes.

Also, the pipe connecting member disclosed in Registration Utility Model No. 20-0452915 allows the piping to be coupled to the body by spirally coupling the fixed cap to both ends of the cylindrical body, and the fixed cap can be turned reversely to easily release the fixed state However, there is a problem in that the structure for pressing and fixing the piping at both ends of the body is very complicated, making re-assembly difficult at the time of disassembly, making recycling difficult.

Registration Utility Model No. 20-0452915 Japanese Patent Application Laid-Open No. 10-2016-0100201 Published patent application No. 10-2011-0022752

It is an object of the present invention to provide a pipe coupling apparatus which can provide a strong binding force with a simple structure and can easily be combined and separated, thereby facilitating connection work and recycling .

Another object of the present invention is to provide a pipe coupling device which is easier to be recycled by preventing foreign substances from being caught or contaminated by threads on the outer surface of the coupler main body.

According to an aspect of the present invention, there is provided a pipe coupling device including: a coupler body having a thread formed on an outer circumferential surface thereof; Two coupling rings formed on an inner circumferential surface of the coupling ring, the coupling rings being rotatable with respect to the coupler body, Wherein the coupler body is formed at a predetermined spacing along the circumferential direction at both ends of the coupler body to form a space into which the pipe is inserted and has a thread formed on the outer surface thereof with a thread of the coupler body, A coupling part formed of a plurality of curved fastening pieces tightly fitted to the outer surface of the pipe while being tightened by the fastening part; And a control unit.

According to the present invention, it is possible to easily and firmly connect the pipe to the coupling device by a simple operation in which the fastening ring of the coupling device is rotated to move the outer surface of the coupler main body to the outer surface of the coupling part, thereby improving convenience and workability .

Further, since the fastening ring is not detached from the coupler main body but remains connected to the outer surface of the coupler main body, handling and maintenance of the coupling device of the present invention can be facilitated without connecting the pipe.

In addition, since the bellows cover is relatively rotatably engaged with the fastening ring on the outer side of the coupler body to conceal the thread of the coupler body, it is possible to prevent the thread of the outer surface of the coupler body from being contaminated by foreign matter, . Therefore, it is easy to separate the pipe, and the effect of semi-permanent recycling is also available.

In the case where a groove is formed on the outer surface of the intermediate portion of the coupler main body or an elastic band is provided on the inner side of the groove, even if vibration or impact is applied to the coupler main body by an earthquake or other external force, So that the connection state of the pipe can be stably maintained.

1 is a cross-sectional view of a pipe coupling device according to an embodiment of the present invention, in which a pipe is not connected.
Fig. 2 is a cross-sectional view of the pipe coupling device shown in Fig. 1, showing a pipe connected.
3 is an enlarged cross-sectional view of a main part of the pipe coupling device shown in Fig.
4 is a side view of the pipe coupling device shown in Fig.
5 is a view showing a modeling shape for structural analysis of a pipe coupling apparatus according to the present invention.
6 is a view showing constraint conditions and load conditions for the structural analysis of the modeling shape shown in FIG.
FIG. 7 is a view showing a result of a structural analysis using the constraint condition and the load condition shown in FIG.

Hereinafter, preferred embodiments of a pipe coupling device according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, a pipe coupling apparatus according to an embodiment of the present invention includes a coupler body 10, two coupling rings 10a and 10b coupled to the outer surfaces of the coupler body 10 and the coupling portion 30, Two coupling portions 30 integrally formed at both ends of the coupler main body 10 to fix the pipe P while being tightened in the radial direction by the coupling ring 20, And a bellows cover 40 provided between the two fastening rings 20.

The coupler body 10 has a circular tube shape in which a thread 11 is formed on the outer peripheral surface. The threads 11 of the coupler main body 10 are formed in opposite directions from the center of the coupler main body 10 so that the two coupling rings 20 rotate in opposite directions to each other, And moves axially in opposite directions to each other.

The coupling ring 20 is formed in a ring shape having an inner circumferential surface and a thread 21 threadedly engaged with the thread 11 of the coupler body 10 and moves in the axial direction while rotating with respect to the coupler main body 10 And acts to tighten or release the coupling portion 30 radially inward. The outer surface of the fastening ring 20 may be chamfered into a polygonal shape so as to be easily tightened or loosened by a general tightening tool such as a spanner, and has a hexagonal nut-like shape.

The coupling portion 30 is composed of a plurality of fastening pieces 31 integrally formed on both ends of the coupler body 10. Each of the fastening pieces 31 has a curved plate shape and is arranged at regular intervals along the circumferential direction at both ends of the coupler body 10 to form a cylindrical space into which the pipe P is inserted. The tightening piece 31 is formed so as to be inclined so as to gradually flare outwardly in the axial direction at the end portion of the coupler main body 10. [ This is to allow the pipe P to be smoothly connected to the inner space of the coupling portion 30 when the pipe P is pushed into the outer end portion of the coupling portion 30.

A thread 32 is formed on the radially outer surface of the tightening piece 31 so as to be continuous with the thread 32 of the coupler body 10 and is tightened radially inwardly by the fastening rings 20, P). A plurality of pressing protrusions 33 in the form of a triangular ratchet gear are continuously formed on the radially inner surface of the tightening piece 31 in order to increase the force for fixing the pipe P. [ The pressing projection 33 can be smoothly drawn in when the pipe P is pulled in the coupling part 30. When the pipe P is fixed by the coupling part 30, And is formed to be inclined in a direction to provide a resistance force that is not separated from the coupling portion (30). Further, when the outer peripheral surface of the pipe P is pressurized and fixed, the pressure protrusion 33 of the ratchet gear shape performs a damping action to a certain extent on the vibration such as rocking or the like, thereby providing an advantage of maintaining a stable fixing force even in case of vibration or vibration .

A stopper flange 37 is formed at the axially outer end of the tightening piece 31 so as to protrude radially outward of the coupler body 10 to limit the movement of the clamping ring 20.

The thickness of the coupler body 10 is larger than the thickness of the fastening piece 31 and is formed between the end of the coupler body 10 and the inside end of the curved fastening piece 31, A stepped portion 34 is formed. The stepped portion 34 serves to support the end portion of the pipe P while restricting the pulling-in position of the pipe P.

When the pipe P is inserted into the space formed by the tightening piece 31 of the coupling portion 30 and is tightly tightened by the tightening piece 31, the fluid flowing inside the pipe P leaks An O-ring-shaped main sealing material 35 is provided on the inner surface of the tightening piece 31 so as to be watertight or hermetic in a resilient manner with the outer surface of the pipe P. A greatest amount of force is applied to the axially outer end of the clamping piece 31 when the clamping piece 31 is pressed by the clamping ring 20 so that a plurality of main sealings 35 ) In the axial direction.

Also, the step portion 34 may be provided with an auxiliary sealing material 36 in the form of an O-ring of flexible resin, which is water-tight or hermetic, while being elastically adhered to the end portion of the pipe P.

The bellows cover 40 is provided so as to surround the outer surface of the coupler body 10 between the two fastening rings 20 and has a cylindrical shape that is contracted to expand and contract in the axial direction of the coupler body 10, (11) formed on the outer surface of the coupler main body (10) while being expanded or contracted by the axial movement of the coupling ring (20), thereby preventing the foreign material from being caught or contaminated by the thread (11) do. With this bellows cover 40, the coupling device of the present invention can be easily separated after connection of the pipe P, and semi-permanently recyclable.

The bellows cover 40 can be smoothly expanded and contracted without twisting the bellows cover 40 during rotation of the fastening ring 20 when the bellows cover 40 is connected to the fastening ring 20 so as to be relatively rotatable with respect to the fastening ring 20 . The bellows cover 40 is provided at both ends of the bellows cover 40 so as to be rotatable relative to the bellows ring 20 via a bearing 42 so that even if the bellows cover 20 rotates relative to the coupler body 10, (40) does not rotate but only stretches and shrinks.

In order to maintain a stable pipe connection state even if the coupling device of the present invention is subjected to vibration due to an earthquake or other external force, a groove 15 recessed radially inward is formed on the outer surface of the center portion of the coupler main body 10, Is formed along the circumferential direction of the coupler body 10. [ In addition, an elastic band 50 made of a flexible resin material having elasticity such as rubber or silicone may be provided on the inside of the groove 15. The elastic band (50) has a circular ring shape and is elastically inserted into the groove (15).

Such a coupling device of the present invention operates as follows.

When the pipe P is to be connected to the coupling device, as shown in FIG. 1, when the coupling ring 20 is positioned on the outer surface of the coupler main body 10, the pipe P ). At this time, since the end portion of the tightening piece 31 of the coupling portion 30 is radially outwardly opened, the end portion of the pipe P can be smoothly inserted into the space between the tightening pieces 31.

After the pipe P is inserted into the coupling portion 30, the fastening ring 20 is rotated to move axially outward of the coupler body 10 so that the fastening ring 20 contacts the outer surface of the coupling portion 30 The tightening piece 31 is tightly fixed to the outer surface of the pipe P while being tightened radially inward by the tightening ring 20 so that the end of the pipe P is firmly fixed by the tightening piece 31 do. Since the end of the bellows cover 40 is relatively rotatably connected to the fastening ring 20 via the bearing 42, the fastening ring 20 is connected to the coupling portion 30 in the coupler body 10, The screw thread 11 formed on the outer surface of the coupler main body 10 is held in a concealed state by the bellows cover 40. As shown in Fig.

When the pipe P is inserted into the other coupling portion 30 in the same manner and the pipe P is engaged by tightening the tightening piece 31 by rotating the tightening ring 20, And is tightly connected by the pipe coupling device of the invention.

When the pipe P is to be separated from the pipe coupling device of the present invention, when the fastening ring 20 is rotated in the direction opposite to the previous direction, the fastening ring 20 is moved from the outer surface of the coupling portion 30 to the coupler main body 10 The coupling portion 30 is opened and opened and the force for pressing the pipe P is removed so that the pipe P can be easily detached from the coupling portion 30. [

The pipe coupling device of the present invention can easily and firmly attach the pipe P to the coupling device by a simple operation in which the coupling ring 20 is rotated to move the outer surface of the coupler body 10 and the outer surface of the coupling portion 30 You can connect.

Since the coupling ring 20 is not separated from the coupler main body 10 but remains connected to the outer surface of the coupler main body 10, And easy maintenance.

The bellows cover 40 is rotatably engaged with the clamping ring 20 so as to rotate relative to the coupler body 10 so that the clamping ring 20 is expanded and contracted by the axial movement of the clamping ring 20, 11), it is possible to prevent the thread of the outer surface of the coupler body 10 from being contaminated by the foreign substance and the operation of the fastening ring 20 is prevented. Therefore, it is easy to separate the pipe, and there is an advantage that the pipe can be recycled semi-permanently.

When the elastic band 50 is provided on the inner side of the groove 15 on the outer surface of the intermediate portion of the coupler main body 10 and the coupler body 10 is fixed to the coupler body 10 by an earthquake or other external force, The coupler body 10 can flexibly cope with external force even when vibration or impact is applied. Therefore, the connection state of the pipe P can be stably maintained.

As a result of the structural analysis of the pipe (P) connected to the coupling device of the present invention, it was found through structural analysis that a constant force (100 kg) .

5 is a modeling form of a coupling device for structural analysis. The outer surfaces of the coupler body 10 and the coupling part 30 are omitted from the shapes of the threads 11 and 32 for ease of analysis, And the right side is the pipe (P). As shown by the modeling of the combination of the two.

Fig. 6 shows constraint conditions and load conditions for the analysis. It is assumed that the maximum force that the person 100 kg can pull on the portion of the pipe P (assuming that it hangs) in a state where the fastening ring 20 is fastened to the outer surface of the coupling portion 30 of the coupling device and the fastening piece 31 is fixed * 9.81 = 981 N).

Fig. 7 shows the result of this structural analysis, and the maximum stress occurs in the last thread, and the value is confirmed to be about 31.9 MPa. This value is stable because the material is lower than the allowable stress of 250 MPa and 203 MPa for structural steel and stainless steel. That is, it can be seen that the pipe and the coupling device are stable with respect to a certain force.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

10: coupler body 11: threaded
15: groove 20: fastening ring
21: thread 30: coupling part
31: fastener 32: thread
33: pressing projection 34:
35: main sealing material 36: auxiliary sealing material
40: Bellows cover 42: Bearing
50: elastic band

Claims

A coupler body (10) having a thread formed on an outer peripheral surface thereof;
Two fastening rings 20 formed on the inner circumferential surface of the fastening ring 20 so as to be threadedly engaged with the threads of the coupler body 10 and axially moving with respect to the coupler body 10;
The coupler main body 10 is formed with a space in which the pipes P are arranged at regular intervals along the circumferential direction at both ends of the coupler body 10 and a thread is continuously formed on the outer surface of the coupler body 10, A coupling portion 30 made of a plurality of curved fastening pieces 31 which are tightened radially inwardly by the respective fastening rings 20 and brought into close contact with the outer surface of the pipe P; And
A bellows cover 40 of a corrugated cylindrical shape disposed between the two fastening rings 20 so as to extend in the axial direction of the coupler body 10 while surrounding the outer surface of the coupler body 10;
Wherein the pipe coupling device comprises:

2. The pipe coupling device according to claim 1, wherein the fastening piece (31) of the coupling part (30) is formed so as to be inclined so as to gradually flare outwardly in the axial direction at an end of the coupler body (10).

The coupling member according to claim 1, wherein a stopper flange (37) for restricting the movement of the clamping ring (20) is projected radially outward from the coupler body (10) at an outer end of the clamping piece (31) And the pipe coupling device is formed.

The pipe coupling device according to any one of claims 1 to 3, characterized in that a plurality of pressing projections (33) in the form of a triangular ratchet gear are formed continuously on the inner surface of the tightening piece (31) .

4. An apparatus according to any one of claims 1 to 3, wherein an O-ring-shaped main seal member (31) is provided on the inner surface of the tightening member (31) to elastically contact the outer surface of the pipe (P) (35) is provided in the pipe coupling device.

The connector according to any one of claims 1 to 3, wherein the thickness of the coupler body (10) is larger than the thickness of the fastening piece (31), so that an end portion of the coupler body (10) And a step portion (34) which is in contact with an end portion of the pipe (P) is formed between the inner end portions.

An auxiliary sealing material (36) in the form of an O-ring made of a flexible resin material which is water-tight or hermetic is provided in the stepped portion (34) in a resilient close contact with the end portion of the pipe (P) And the pipe coupling device is installed.

2. The pipe coupling device according to claim 1, wherein the threads formed on the outer surface of the coupler body (10) are formed in opposite directions from the center of the coupler body (10).

delete

The bellows cover according to claim 1, wherein both end portions of the bellows cover (40) are rotatably mounted on the fastening ring (20) via bearings (42) so that the fastening ring (20) And the bellows cover (40) does not rotate even if it rotates.

2. The pipe coupling device according to claim 1, wherein a groove (15) recessed radially inward is formed along the circumferential direction of the coupler body (10) on an outer surface of a center portion of the coupler body (10).

12. The pipe coupling device according to claim 11, wherein an elastic band (50) of a flexible resin material having an elastic force is provided inside the groove (15).