KR200337739Y1 - Combined structure of pipe - Google Patents

Abstract

A coupling structure of pipes is disclosed. The present invention is coupled to the end of the first pipe, the union solder having a header portion, the body portion extending from the header portion; and a nut is inserted into the end formed with the engaging jaw portion, the nut is screwed to the union solder to the first A second pipe in communication with the pipe; and formed in the union solder and the second pipe, respectively, to set the position of the first pipe with respect to the second pipe when the first and second pipes are coupled, the body of the union solder And positioning means including a rotation preventing groove formed at one of the ends of the portion or the second pipe, and a rotation preventing projection formed at an end of the body portion of the second pipe or the union solder and inserted into the groove for preventing rotation. Anti-rotation stones at one end of the first pipe and at the end of the union solder into which the second pipe to be coupled thereto is inserted and fixed. By forming the outlet portion and the groove portion, and inserting the anti-rotation protrusion along the anti-rotation groove portion, it is possible to prevent the rotation of the pipe at the time of communication fastening between the first pipe and the second pipe. As a result, interference with the parts disposed adjacent to each other can be prevented due to the rotation of the first and second pipes, so that assembly and workability are greatly improved.

Description

Combined structure of pipes

The present invention relates to a coupling structure of a pipe, and more particularly, to a coupling structure of a pipe having an improved structure of a portion where the pipe is coupled to prevent rotation of the pipe when the pipe is joined.

In general, for the heating or cooling of automobiles, a circular or polygonal long hollow pipe for transporting liquids, gases, etc. is used, and pipes of a predetermined length are used by being fastened to each other. The fastening part of the pipe must be firmly fixed, airtight and not released unless artificial external pressure is applied.

A fitting device used for fastening such pipes may be a union joint. The union joint may connect the end portions of the plurality of pipes in a communicable manner using a union nut. Typically, the union joint is composed of a union screw that connects both a union screw connected to the first pipe and a union swivel end connected to the second pipe.

1 shows a conventional pipe fitting device 10.

Referring to the drawings, the pipe fitting device 10 includes a union solder 12 coupled to the end 11a of the first pipe 11, a bushing 13 coupled to the union solder 12, and 2 includes a nut 15 inserted into the locking jaw portion 14b formed at the end 14a of the pipe 14 and an O-ring 16 inserted into one side of the locking jaw portion 14b.

A thread is formed on an outer circumferential surface of the body portion 12a of the union solder 12, and a thread corresponding to the inner circumferential surface of the bushing 13 is formed and screwed together. A header portion 12b is formed at one end of the body portion 12a, and the header portion 12b has a head shape of a hexagon nut or bolt.

A thread 15a is formed at one side of the inner circumferential surface of the nut 15, and a corresponding thread is formed at the outer circumferential surface of the bush 13 and screwed together.

The fitting action of the pipe fitting device 10 of the above structure is as follows.

In order to communicate the first and second pipes 11 and 14 with each other, the second pipe 14 having the locking jaw portion 14b is inserted into the nut 15 and the O-ring is brought into contact with the locking jaw portion 14b. (16) will be inserted. After screwing the outer circumferential surface of the bushing 13 to the threaded portion 15a of the nut 15, the body portion 12a of the union solder 12 is inserted through the hollow of the bushing 13 so that The body portion 12a of the union solder 12 is screwed to the inner circumferential surface of the bushing 13.

Subsequently, the header portion 12b of the union solder 12 is held by using a spatter or other tool, pressed against the locking jaw portion 14b of the second pipe 14, and fully tightened, and then the nut 15 ) Several times and fully fit using a torque wrench or other tool.

By the way, the conventional pipe fitting apparatus 10 has the following problems.

First, the fitting method using the union joint may cause interference with other components installed in a narrow space due to idle idling of the pipe when not paying attention to the assembly process.

Secondly, after rotating the nut a number of times, using a tool such as a spanner to completely fix the union solder and tighten the nut again completely, workability is poor.

Third, there are many parts for fastening a plurality of pipes.

The present invention is to solve the above problems, the object of the present invention is to improve the structure to prevent the rotation of the pipe when connecting a plurality of pipes to provide an assembly structure of the improved pipe assembly.

1 is a cross-sectional view showing a conventional pipe coupling structure,

Figure 2 is an exploded perspective view showing a pipe coupling structure according to an embodiment of the present invention,

3 is a cross-sectional view showing the pipe coupling structure of FIG.

<Brief Description of Major Codes in Drawings>

20 ... Pipe fitting device 21 ... First pipe

22 ... Union solder 22a ... Body

22b ... Header 22c ... Rotating prevention groove

24..Second pipe 24b ...

24 c ... anti-rotation protrusion 26 ... O-ring

In order to achieve the above object, the coupling structure of the pipe according to one aspect of the present invention,

A union solder coupled to an end of the first pipe and having a header portion and a body portion extending from the header portion;

A second pipe in which a nut is inserted into an end portion of the engaging jaw portion, and the nut is screwed to the union solder to communicate with the first pipe; And

Are formed in the union solder and the second pipe, respectively, to set the position of the first pipe relative to the second pipe when the first and second pipes are joined;

A rotation preventing groove formed on one of the body portion of the union solder or an end of the second pipe, and a rotation preventing protrusion formed on an end portion of the body portion of the second pipe or the union solder and inserted into the groove for preventing rotation; Positioning means; characterized in that it comprises a.

The anti-rotation groove may have a predetermined length along the inner circumferential surface of the body portion end of the union solder, and the anti-rotation protrusion may be formed along the outer circumferential surface of the second pipe end.

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

2 illustrates a coupling structure 20 of a pipe according to an example of the present invention.

Referring to the drawings, the union fitting 22 is coupled to the end portion 21a of the first pipe 21 in the pipe fitting device 20. The union solder 22 includes a header portion 22b into which the end portion 21a of the first pipe 21 is inserted and fixed, and a body portion 22a extending integrally from the header portion 22b. The header portion 22b has a hexagonal nut or bolt head shape. A thread is formed on the outer circumferential surface of the body portion 22a. At the end of the body portion 22a, a groove preventing portion 22c for rotation is formed along the longitudinal direction. The rotation preventing groove portion 22c is formed in at least one place along the inner circumferential surface of the body portion 22a.

A locking jaw portion 24b is formed at an end portion 24a of the second pipe 24 which communicates with the first pipe 21. The locking jaw portion 24b is formed in an annular shape along the outer circumferential surface of the end 24a of the second pipe 24. In addition, an anti-rotation protrusion 24c is formed at an end portion 24a of the second pipe 24 corresponding to the front of the locking step portion 24b. The anti-rotation protrusion 24c protrudes a predetermined length to the outer circumferential surface of the end portion 24a along the longitudinal direction of the second pipe 24.

The anti-rotation protrusion 24c has a size and a length that can be inserted into the anti-rotation groove 22c formed in the body portion 22a of the union solder 22. That is, when the union solder 22 is coupled to the second pipe 24, the rotation preventing protrusion part 24c is inserted into the rotation preventing groove part 22c to set the position so that the first and second pipes are positioned. (21) and 24 are prevented from rotating.

Alternatively, the anti-rotation groove is formed in the end portion 24a of the second pipe 24, and the anti-rotation groove is inserted into the body portion 22a of the union solder 22 to be joined thereto. It may be possible to form protrusions. In addition, an anti-rotation groove or a protrusion may be formed along the outer circumferential surface of the body portion 22a of the first pipe 22, and an anti-rotation protrusion or groove is formed along the inner circumferential surface of the end 24a of the second pipe 24. It can also form wealth. In addition, the bush may be additionally interposed on the outer circumferential surface of the body portion 22a of the union solder 22.

On the other hand, the O-ring 26 may be further interposed in contact with the engaging jaw portion 24a. In addition, a nut 25 screwed into the body portion 22a of the union solder 22 is provided at the end 24a of the second pipe 24.

The fitting action of the pipe fitting device 20 having the structure as described above will be described with reference to FIG. 3.

First, the end portion 21a of the first pipe 21 is inserted into and fixed in the header portion 22b of the union solder 22, and the locking jaw portion 24 is formed to communicate with the first pipe 21. The second pipe 24 is inserted into the nut 25. Then, the O-ring 26 is inserted into contact with the locking jaw portion 24.

Next, the union solder 22 is inserted into the nut 24. In this case, the anti-rotation protrusion part 24c protruding from the outer circumferential surface of the end portion 24b of the second pipe 24 is formed in the longitudinal direction on the inner circumferential surface of the body portion 22a of the union solder 22. Inserted through the coupling. As the anti-rotation protrusion 24c is inserted into the anti-rotation groove portion 22c, the first and second pipes 21 and 24 are engageable with their positions set.

Subsequently, in a state where the nut 25 is screwed to the thread formed on the outer circumferential surface of the body portion 22a of the union solder 22, the nut 25 is rotated a plurality of times and fully fitted using a torque wrench or other tool. Done.

As such, when the first and second pipes 21 and 24 communicate with each other, an end portion of the second pipe 24 is formed along the rotation preventing groove 22c formed in the body portion 22a of the union solder 22. As the anti-rotation protrusion 24c formed in 24a is inserted, the first and second pipes 21 and 24 are engageable with their mutual positions set.

As described above, the coupling structure of the pipe of the present invention forms the anti-rotation protrusion and the groove at the one end of the first pipe and the end of the union solder into which the second pipe to be coupled thereto is inserted, thereby rotating along the anti-rotation groove. By inserting the protruding protrusion, it is possible to prevent the rotation of the pipe in advance when the first pipe and the second pipe communicate with each other. As a result, interference with the parts disposed adjacent to each other can be prevented due to the rotation of the first and second pipes, so that assembly and workability are greatly improved.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

Claims (2)

A union solder coupled to an end of the first pipe and having a header portion and a body portion extending from the header portion; A second pipe in which a nut is inserted into an end portion of the engaging jaw portion, and the nut is screwed to the union solder to communicate with the first pipe; And Are formed in the union solder and the second pipe, respectively, to set the position of the first pipe relative to the second pipe when the first and second pipes are joined; A rotation preventing groove formed on one of the body portion of the union solder or an end of the second pipe, and a rotation preventing protrusion formed on an end portion of the body portion of the second pipe or the union solder and inserted into the groove for preventing rotation; Positioning means; The coupling structure of the pipe comprising a. The method of claim 1, The anti-rotation groove is a predetermined length along the inner peripheral surface of the body portion end of the union solder, the anti-rotation protrusion is formed along the outer peripheral surface of the second pipe end, the coupling structure of the pipe.