KR20170120458A

KR20170120458A - Pipe coupling apparatus

Info

Publication number: KR20170120458A
Application number: KR1020160048981A
Authority: KR
Inventors: 임채갑
Original assignee: 임채갑
Priority date: 2016-04-21
Filing date: 2016-04-21
Publication date: 2017-10-31
Also published as: WO2017183752A1

Abstract

A pipe connection device that simplifies the work process by reducing the number of parts is presented. The pipe connecting device includes a main body having an insertion hole for inserting a pipe therein and an inclined portion formed on an inner side thereof, a through hole through which a pipe is inserted in an inner circumferential surface of the insertion port of the main body and an outer circumferential surface of the pipe, A flange portion formed on one side of the flange portion to be in close contact with the inclined portion, at least one slit formed in the flange portion, at least one hole formed between the slits, and a fastening member fastened to the insertion port of the main body, And a cap nut formed with a through hole.

Description

[0001] PIPE COUPLING APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pipe connecting apparatus, and more particularly, to a pipe connecting apparatus capable of performing a pipe connection easily, firmly, and completely preventing fluid leakage.

In order to supply a fluid such as tap water or gas, a hollow flow tube, which is usually called a pyramid, is employed. A valve for opening and closing the flow of the fluid together with the pipe is employed. Suitable pipe connections are used for connecting pipes to pipes or connecting pipes to valves.

The pipe connecting apparatus is required to have a structure capable of easily performing pipe connection while preventing leakage of fluid that may occur at the connection site and also surely preventing improper disconnection of the pipe from the pipe connection site.

Accordingly, the applicant of the present invention has proposed a pipe connecting device which improves the sealing force between the pipe connecting device and the pipe so as to reliably prevent the leakage of the fluid that may occur at the connecting part. That is, the present applicant has proposed a pipe connecting apparatus including a main body 210, a tightening member 220, a pressing member 230, and a cap nut 240 as shown in FIG.

The fastening member 220 is formed in a ring shape and has a cutout 221 at an intermediate portion thereof. The fastening member 220 is easily compressed by the external pressure by the cutout 221 and the inside diameter is reduced. For example, a serrated stopper 225 is provided on the inner circumferential surface of the tightening member 220. The stopper 225 urges the stopper 225 such that the teeth of the stopper 225 strongly compress or squeeze the outer circumferential surface of the pipe 100 when the tightening member 220 is compressed in the inward direction so that the gap between the tightening member 220 and the pipe 100 Thereby increasing the adhesion.

The pressing member 230 is disposed between the tightening member 220 and the cap nut 240 and is provided with a through hole 231 for inserting the pipe 100 in the central portion thereof. An O-ring groove 233 is provided on the outer circumferential surface of the pressing member 230, and an O-ring 233a is provided thereon. A first pressing protrusion 235 for pressing the O-ring 244a of the cap nut 240 is formed at the rear end of the inner circumferential surface of the through hole 231.

The cap nut 240 is provided with a through hole 241 for inserting the pipe 100 at the central portion thereof and a screw portion 242 for fastening the cap nut 240 to the main body 210 at the outer circumferential surface thereof. The threaded portion 242 is fastened to the threaded portion 213 of the body 210. A second pressing protrusion 243 for pressing the O-ring 233a of the pressing member 230 is provided at the tip end side of the cap nut 240. [ An O-ring groove 244 is provided on the inner peripheral surface of the through hole 241. The O-ring groove 244 is provided with an O-ring 244a. The O-ring 244a is for sealing between the inner circumferential surface of the through hole 241 and the outer circumferential surface of the pipe 100. [ A stepped portion 245 is formed at the front end side of the O-ring 244a. The stepped portion 245 forms a guide groove communicating with the O-ring 244a from the front end of the cap nut 240 together with the outer peripheral surface of the pipe 100. [ The first pressing projection 235 of the pressing member 230 enters the guide groove.

The pipe connecting apparatus thus configured can achieve the desired purpose, but the number of parts is large and the work process is complicated. As a result, the working time is increased, and in particular, the possibility of occurrence of work defects increases as the number of parts increases. Then, the production cost rises.

Prior Art 1: Korean Patent Registration No. 10-0958816 (Pipe Connection Device) Prior Art 2: Korean Patent Registration No. 10-0315341 (Pipe Connection Structure) Prior Art 3: Korean Patent Publication No. 10-2004-0041866 (pipe connecting device)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems of the related art, and an object of the present invention is to provide a pipe connection apparatus which simplifies a work process by reducing the number of parts.

In order to achieve the above object, a pipe connecting apparatus according to a preferred embodiment of the present invention includes: a main body having an insertion port for inserting a pipe therein, A through hole into which the pipe is inserted is formed in a center portion of the pipe, and a groove is formed in an inner circumferential surface in a circumferential direction, and a flange portion, which is in close contact with the inclined portion, Wherein at least one slit is formed in the flange portion, and at least one hole is bored between the slits; And a cap nut fastened to the insertion port of the main body and having a through hole into which the pipe is inserted.

The hole may be any one of a square hole, a long hole, and a circular hole.

The slit may be formed to reach the groove from the outermost side of the flange portion.

A first O-ring may be provided on the outer circumferential surface of the tightening member to seal the outer circumferential surface of the tightening member and the inner circumferential surface of the main body.

A second O-ring may be provided on an inner circumferential surface of the cap nut to seal the inner circumferential surface of the cap nut and the outer circumferential surface of the pipe.

A pressing protrusion for pressing the second O-ring coupled to the cap nut may be formed on the other side of the tightening member.

A pressing protrusion for pressing the first O-ring coupled to the tightening member may be formed at the front end of the cap nut.

The thickness of the corresponding portion where the groove is formed may be smaller than the thickness of the other portion of the flange portion where the groove is not formed.

According to the present invention having such a configuration, not only the work process is further simplified by reducing the number of parts, but also the joining and releasing of the pipe to the pipe connecting means is very easy.

In addition, it is possible to reliably prevent the pipe coupled to the body from being arbitrarily disengaged, and reliably prevent the fluid from leaking through the joint portion between the body and the pipe.

1 is a view showing an example of a conventional pipe connecting apparatus.
2 is an exploded perspective view of a pipe connecting apparatus according to an embodiment of the present invention.
3 is an enlarged view of the tightening member shown in Fig.
4 is a sectional view taken along line AA in Fig.
FIG. 5 is a view showing the coupling between the tightening member and the first O-ring shown in FIG. 2. FIG.
FIG. 6 is a view illustrating the coupling between the cap nut and the second O-ring shown in FIG. 2. FIG.
FIG. 7 is a view showing the coupling between the tightening member, the first O-ring, the second O-ring, and the cap nut shown in FIG. 2;
FIG. 8 is an assembled perspective view of FIG. 2. FIG.
9 is a cross-sectional view of BB line in Fig.
10 is a modification of the tightening member shown in Fig.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

3 is an enlarged view of the fastening member shown in Fig. 2, Fig. 4 is a cross-sectional view taken along the line AA in Fig. 3, and Fig. 5 is a cross- FIG. 6 is a view showing a coupling between the cap nut and the second O-ring shown in FIG. 2, FIG. 7 is a view showing a coupling between the tightening member and the first O- , The second O-ring, and the cap nut.

In the embodiment of the present invention, it is assumed that the present invention is applied to a T-shaped pipe connector having three insertion ports to which the pipes 60 are coupled and which are configured to communicate with each other internally. Here, since the respective pipe connection structures for the three pipe insertion ports are substantially the same, only the connection structure for one pipe insertion port will be described in detail.

The pipe connecting apparatus according to the embodiment of the present invention includes a main body 10, a tightening member 20, and a cap nut 50. [

The main body 10 is provided with at least one insertion port 11 for inserting the pipe 60 therein. A threaded portion 13 for fastening the cap nut 50 is formed on the inner circumferential surface at the inlet side of the insertion port 11. An inclined portion 12 for pressing the tightening member 20 in the inward direction (that is, in the direction of the outer peripheral surface of the pipe 10) is formed on the inner peripheral surface of the insertion port 11. Since the tightening member 20 is inserted into the insertion port 11 and fitted into the outer peripheral surface of the pipe 10, the above-described inward direction can be the direction of the outer peripheral surface of the pipe 10.

The tightening member 20 is disposed between the inner circumferential surface of the insertion port 11 of the body 10 and the outer circumferential surface of the pipe 60.

The tightening member 20 may be made of, for example, spring steel having high strength and high elasticity. The fastening member 20 has, for example, a ring-shaped body 21, and a through hole 22 for inserting the pipe 60 is formed in a central portion of the body 21.

A flange portion 23 is formed at one end of the body 21 of the tightening member 20. The flange portion 23 corresponds to the inclined portion 12 of the main body 10 and is inclined inwardly. In other words, the flange portion 23 is structured such that the outer diameter gradually increases from the portion to be inserted into the insertion port 11 of the main body 10 toward the rear end. A groove 29 is formed in the circumferential direction at the connecting portion between the body 21 and the flange portion 23 (that is, the inner peripheral surface of the tightening member 20). At least one slit (27) is formed at a predetermined interval in the flange portion (23). The slit 27 is formed so as to reach the groove 29 from the outermost side of the flange portion 23. The slit 27 is intended to allow the flange portion 23 to be compressed more easily in the direction of the groove 29. Here, it is preferable that the thickness d1 (width) of the remaining portion where the groove 29 is formed is smaller than the thickness d2 of the flange portion 23. In the embodiment of the present invention, six slits 27 are formed, but the number of the slits may be increased or decreased according to the diameter of the fastening member 20. On the other hand, a stopper 21a having a saw tooth shape or a thread shape, for example, is formed on the inner peripheral surface of the flange portion 23. A stopper 21a is provided on the inner peripheral surface of the flange portion 23, To increase the adhesion between the tightening member (20) and the pipe (60) by strongly pressing or crushing the outer peripheral surface of the pipe (60). The structure of the stopper 21a in the embodiment of the present invention is not limited to a specific one but any structure capable of improving the adhesion between the tightening member 20 and the pipe 60 can be employed in the same manner.

Here, the roles of the slits 27 and the grooves 29 will be described again. The tightening member 20 coupled with the cap nut 50 is inserted into the insertion port 11 of the main body 10 and the flange portion 23 of the tightening member 20 is tightly fixed to the inclined portion 12 of the main body 10 The inner diameter of the tightening member 20 must be reduced. To this end, the fastening member 20 must be twisted in its entirety while being compressed inward, thus requiring a considerably greater tightening force when compressing the fastening member 20. [ If the slit 27 is formed in the flange portion 23 of the fastening member 20 and the groove 29 is formed in the inner circumferential surface of the fastening member 20, a particularly large external force is not required to compress the flange portion 23 inward . In other words, since the groove 29 is formed and the thickness d1 of the remaining portion is smaller than the thickness d2 of the flange portion 23, the flange portion 23 provides an elastic force that can be easily removed.

In particular, one or more apertures 28 may be drilled between the slit 27 and the slit 27 of the tightening member 20. In Fig. 3, the hole 28 is a rectangular hole, but it may be a square hole. Further, the hole 28 may be formed as a long hole (a rectangle having rounded corners). In the embodiment of the present invention, only one square hole 28 is illustrated between the slit 27 and the slit 27, but it is also possible to drill two or more holes 28 (rectangular, square, long hole) . Rectangular holes and square holes may be examples of square holes.

The flange portion 23 is provided by the slit 27 and the groove 29 so as to provide an elastic force capable of being easily pinched by the slit 27 and the slit 27 When the one or more holes 28 are formed, the elastic force of the flange portion 23 is doubled. Accordingly, as compared with the case where the hole 28 is not provided, the presence of the hole 28 makes it possible to easily tighten even a little force by amplifying the elastic force of the flange portion 23 more. In other words, in the embodiment of the present invention, by forming the slit 27, the hole 28 and the groove 29 in the tightening member 20, it is possible to very easily reduce the inner diameter of the tightening member 20 with only a slight pressing force . Therefore, since a large force is not required to fasten the cap nut 50 to the main body 10, the work efficiency of the operator can be maximized.

An O-ring groove 24 is formed on the outer circumferential surface of the body 21 of the tightening member 20. A first O-ring (30) is provided in the O-ring groove (24). The first O-ring 30 seals the space between the outer circumferential surface of the tightening member 20 and the inner circumferential surface of the main body 10. At the rear end of the O-ring groove 24, a step 25 is formed. The step 25 prevents the first O-ring 30 from falling out of the O-ring groove 24. A pressing projection 26 is formed at the rear end of the step 25, that is, at the other end of the body 21. The pressing projection 26 is for pressing the second O-ring 40 coupled to the cap nut 50.

The cap nut 50 is fastened to the insertion port 11 of the main body 10 and the pipe 60 is inserted into the center portion and one end of the cap nut 50 is brought into contact with the tightening member 20.

A through hole 52 for inserting the pipe 60 is formed in the center of the body 51 of the cap nut 50. A threaded portion 53 for fastening the cap nut 50 to the main body 10 is formed on the outer circumferential surface of one side of the body 51 of the cap nut 50. The threaded portion 53 is fastened to the threaded portion 13 of the body 10.

On the other hand, an O-ring groove 54 is formed at the connecting portion between the body 51 of the cap nut 50 and the screw portion 53, that is, the inner circumferential surface of the cap nut 50. A second O-ring (40) is provided in the O-ring groove (54). The second O-ring 40 is for sealing between the inner circumferential surface of the cap nut 50 and the outer circumferential surface of the pipe 60. A stepped portion 55 is formed on the front end of the O-ring groove 54, that is, on the inner peripheral surface of the threaded portion 53. The stepped portion 55 prevents the second O-ring 40 from falling out of the O-ring groove 54. A pressing projection 56 is formed at the front end of the stepped portion 55, that is, at the front end portion of the cap nut 50. The pressing protrusion 56 is for pressing the first O-ring 30 coupled to the tightening member 20.

Although the body 51 of the cap nut 50 is shown in the form of a circular ring in the embodiment of the present invention, it may be a hexagonal or octagonal ring shape if necessary.

8 is an assembled perspective view of FIG. 2, and FIG. 9 is a sectional view taken along line B-B of FIG.

7 and 8, when the structure in which the tightening member 20, the first O-ring 30, the second O-ring 40, and the cap nut 50 are coupled to the body 10 as shown in FIG. 7, Become like.

That is, when the cap nut 50 is fastened to the main body 10 and a certain pressure is applied to the fastening member 20 in the longitudinal direction of the pipe, the pressing force is concentrated on the distal end portion of the flange portion 23 of the fastening member 20. Accordingly, the groove 29 of the fastening member 20 is compressed, and an external force is applied in a direction in which the inclination angle of the flange portion 23 is increased. When the angle of inclination of the flange portion 23 becomes large, the length in the vertical direction of the flange portion 23 becomes large. At this time, the groove 28 of the flange portion 23 doubles the elastic force so that the flange portion 23 can be easily warped.

The stopper 21a of the flange portion 23 strongly engages with the thread 62 of the outer circumferential surface of the pipe 60 because the outer circumferential surface of the tightening member 20 is supported by the inner circumferential surface of the body 10. [ As a result, the coupling force between the tightening member 20 and the pipe 60 is increased, and the pipe 60 is prevented from being easily detached from the main body 10.

When the cap nut 50 is tightened to a predetermined pressure or more, the pressing protrusions 56 of the cap nut 50 press the first O-ring 30 coupled to the tightening member 20, The pressing projection 26 presses the second O-ring 40 coupled to the cap nut 50. Accordingly, since the first O-ring 30 and the second O-ring 40 are compressed along the longitudinal direction of the pipe 60, the thickness of the first O-ring 30 and the second O-ring 40 in the vertical direction is maximized . This phenomenon significantly improves the airtightness between the main body 10 and the pipe 60. [ That is, the first O-ring 30, which is maximally expanded, makes the space between the outer peripheral surface of the tightening member 20 and the inner peripheral surface of the main body 10 more airtight. The second O-ring 40, which is maximally expanded, makes the gap between the inner circumferential surface of the cap nut 50 and the outer circumferential surface of the pipe 60 more airtight. The first O-ring 30 and the second O-ring 40 enlarged to the maximum allow fluid to flow between the inner circumferential surface of the body 10 and the outer circumferential surface of the tightening member 20 and the inner circumferential surface of the cap nut 50, It is possible to completely prevent leakage to the outside through the outer circumferential surfaces.

According to the embodiment of the present invention as described above, the number of parts can be reduced, so that the work process can be further simplified, and the joining and disengagement of the pipe to the pipe connecting means can be greatly facilitated.

One or more slits 27 and holes 28 are formed in the flange portion 23 so that the flange portion 23 of the fastening member 20 is integrally formed on the inner peripheral surface of the fastening member 20 By forming the groove 29 in the circumferential direction, a particularly large external force is not required in the case of compressing in the inward direction.

Since the O-rings 30 and 40 are provided on the outer circumferential surface of the tightening member 20 and the inner circumferential surface of the cap nut 50 so that the fluid flows from the outer circumferential surface of the pipe 60 to the inner circumferential surface of the tightening member 20 and the cap nut 50 Is completely blocked out.

As described above, according to the present invention, it is possible to easily engage and disengage the pipe with respect to the main body of the pipe connecting device, to reliably prevent the pipe coupled to the main body from being disengaged, It is possible to realize a pipe connection device which can reliably prevent the fluid from leaking.

10 is a modification of the tightening member shown in Fig.

3, the hole 28 of the flange portion 23 of the fastening member 20 has a quadrangular shape. In FIG. 10, the hole 28 is different from the circular hole 64 in the shape of a quadrilateral.

10, the number of the circular holes 64 is three, but the number of the circular holes 64 can be increased or decreased according to the diameter of the tightening member 20 or the interval between the slits 27. [

As described above, the circular hole 64 may be formed in the flange portion 23 of the fastening member 20 instead of the square hole or the long hole.

As described above, an optimal embodiment has been disclosed in the drawings and specification. While specific terms have been employed herein, they are used for the purpose of describing the invention only and are not used to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Body
20: fastening member
30: First O-ring
40: Second O-ring
50: Cap nut

Claims

A main body having an insertion hole for inserting a pipe therein and an inclined portion formed on an inner side thereof;
A through hole into which the pipe is inserted is formed in a center portion of the pipe, and a groove is formed in an inner circumferential surface in a circumferential direction, and a flange portion, which is in close contact with the inclined portion, Wherein at least one slit is formed in the flange portion, and at least one hole is bored between the slits; And
And a cap nut fastened to the insertion port of the main body and having a through hole into which the pipe is inserted.

The method according to claim 1,
Wherein the hole is one of a square hole, a long hole, and a circular hole.

The method according to claim 1,
And the slit is formed to reach the groove from the outermost side of the flange portion.

The method according to claim 1,
Wherein a first O-ring is provided on an outer circumferential surface of the tightening member to seal the outer circumferential surface of the tightening member and the inner circumferential surface of the main body.

The method of claim 4,
Wherein a second O-ring is provided on an inner circumferential surface of the cap nut to seal the inner circumferential surface of the cap nut and the outer circumferential surface of the pipe.

The method of claim 5,
And a pressing projection for pressing the second O-ring coupled to the cap nut is formed on the other side of the tightening member.

The method of claim 5,
And a pressing protrusion is formed at a front end of the cap nut to press the first O-ring coupled to the tightening member.

The method according to claim 1,
And the thickness of the corresponding portion where the groove is formed is smaller than the thickness of the other portion of the flange portion where the groove is not formed.