KR101568793B1 - Connecting Srtucture Of Pipes - Google Patents

Abstract

The present invention relates to a piping connection structure that enables easy connection without changing the structure of an object to be connected. His composition is; A connecting body provided with a bolt fastening portion in a direction toward the pipe as an object to which the pipe is to be connected; And a female screw fastened to the bolt fastening part in a direction toward the coupling body, the fastening part being fitted to the pipe before the end of the pipe is expanded, A locking nut having a locking protrusion provided at an end of the locking pin; And an auxiliary connecting portion having a sealing portion provided at an end portion of the intubating portion and interposed between the inner circumferential surface of the extending portion and the bolt connecting portion, the connecting portion being connected to an expanded end portion of the pipe, ; And

Description

Connecting Struture Of Pipes

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a piping connection structure, and more particularly, to a piping connection structure that allows piping to be easily connected without changing the structure of an object to be connected.

In order to connect various piping such as refrigerant piping and gas piping of an air conditioner to a predetermined mechanical device, a piping connection structure is required. The connection structure of these pipes should basically have to prevent leaks or leaks and should not be relaxed by vibration or external impact.

According to the connection structure of the conventional pipe, the end portion of the pipe is expanded like a fall pipe, and the nut and the bolt are tightened by fastening the pipe with the pipe in the middle, so that the pipe is tightly attached to the tip of the bolt to maintain airtightness. This is a method commonly used for aluminum pipes and copper pipes.

However, this method requires precise conditions by precisely aligning the shapes of the tip of the bolt and the expansion part of the pipe, and if the connection part is impacted and permanent shape deformation occurs, the possibility of leakage of the fluid becomes very large.

Although it has been proposed to connect pipes in a one-touch manner for easy connection of pipes (for example, Korean Patent Application Nos. 10-2008-0026226 and 10-2012-0111821) And the cost is increased due to the complexity.

Korean Patent Application No. 10-2008-0026226 Korean Patent Application No. 10-2012-0111821

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a piping connection structure capable of firmly securing airtightness or watertightness by adding a very simple component to a piping connection structure and eliminating problems caused by a loosened connection portion by impact . It is another object of the present invention to provide a piping connection structure that can easily carry out piping connection work by reducing the burden of processing an object to be connected to piping so as to exactly match the shape of the piping expansion portion .

The above objects are accomplished by providing a connecting body in which a bolt fastening portion is provided in a direction toward a pipe as an object to which a pipe is to be connected; Wherein the bolt fastening part is provided with a female screw fastened to the pipe before the end of the pipe is expanded and in a direction toward the connecting body, A fastening nut provided with an engagement jaw at an end point of the female screw; And an auxiliary connecting portion having a sealing portion provided at an end portion of the intubating portion and interposed between the inner circumferential surface of the extending portion and the bolt connecting portion, ; Wherein the sealing part is made of rubber or synthetic resin and is formed by a hollow pipe connection structure having one or more air pockets along the circumferential direction in the middle.

According to an aspect of the present invention, the sealing portion may be formed to have one side of the single pipe, and may be formed in the same shape as the pipe-expanding portion so as to cover the pipe-expanding portion of the pipe.

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According to another aspect of the present invention, the sealing portion is made of rubber or a synthetic resin material, and includes an inner tube which is inserted into the inner tube portion, an outer tube which is fitted to the outside of the intubation tube portion, It may be composed of a conical cylinder in the form of a widening toward the end.

According to the above-described structure, by further fitting the auxiliary connection between the piping and the connecting body in the existing piping connection structure, the shape of the connecting body can be freed from the burden of exactly matching with the extending portion of the piping, The airtightness and the watertightness can be firmly maintained. This makes it possible to easily carry out the connection work of the piping and provides an economical pipe connection structure with little cost.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view of a piping connection structure according to an embodiment of the present invention in an exploded state; FIG.
Fig. 2 is a cross-sectional view showing the fastening state of the connection structure of the piping according to the embodiment of the present invention.
3 is a perspective view of the auxiliary connector of the piping connection structure according to the embodiment of the present invention.
4 is a cross-sectional view of an auxiliary connector of a piping connection structure according to another embodiment of the present invention.
5 is a cross-sectional view of an auxiliary connector of a piping connection structure according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto. First, one embodiment of the present invention will be described with reference to Figs.

The connector 40 may be any one of a connector, a valve, a nozzle, and a mechanical device for connecting the pipe 10 and the pipe 10 as objects to which the pipe 10 is connected. The connecting body (40) is provided with a bolt fastening portion (41) in a direction toward the pipe (10). The bolt fastening part 41 is provided with a passage 43 in the middle thereof and has a rod shape in which a male screw 42 is formed. A tapered portion 44 is formed at the tip end of the bolt fastening portion 41. According to the prior art, the tapered portion 44 should have an inclination and an area that can be in surface contact with the expanded portion 11 of the pipe, but this is not necessarily the case according to the present invention.

The fastening nut 20 fastened to the bolt fastening portion 41 of the connector 40 is inserted into the pipe 10 before the end of the pipe 10 is expanded. Thereafter, the end of the pipe 10 is expanded into a trumpet shape.

The fastening nut 20 provided with the flow path 23 in the middle is provided with a female screw 22 in the direction toward the coupling body 40 and is provided with a locking jaw 22 for restricting the depth to which the bolt fastening portion 41 is inserted. (21). The female screw 22 is screwed to the bolt fastening portion 41 and the fastening protrusion 21 is provided at the end point of the female screw 22. That is, the fastening nut 20 is composed of a large-diameter portion and a small-diameter portion, and the latching jaw 21 is provided at a boundary portion between these. The engaging jaw 21 is tapered and the inclination of the taper is set to be similar to the expansion portion 11 of the pipe.

According to an aspect of the present invention, the auxiliary connector (30) is coupled to the expanded end of the pipe (10). The auxiliary connector 30 is provided at one end of the intubation section 31 and is provided between the inner circumferential surface of the expanded section 11 and the bolt fastening section 41 And has a sealing portion 32 to be interposed therebetween.

The auxiliary connector 30 may be made of a metal material such as aluminum, copper, or stone, or may be made of synthetic resin or rubber. The material and the specific shape of the auxiliary connector 30 can be variously selected as needed. In selecting the material, the properties of the fluid should be referred to. The sealing portion 32 of the auxiliary connector 30 may be more variously deformed.

1 to 3 show an example of the auxiliary connector 30. The sealing portion 32 is formed so as to be expanded with the expanded portion 11 of the pipe in the same manner as the expanded portion 11. The thickness of the auxiliary connector 30 can provide an enlarged view of a single tube of 0.3 to 1.0 mm. It is preferable that the material of the auxiliary connector 30 is flexible rather than piping.

4 is a cross-sectional view of an auxiliary connector 30 according to another embodiment of the present invention. According to the present embodiment, the auxiliary connector 30 is manufactured by blow molding using rubber, urethane or various synthetic resins. The auxiliary connector 30 includes an intubating section 31 and a sealing section 32 formed at one end thereof. The sealing portion 32 has one or more air pockets 112. The air pocket 112 is provided in an annular shape and includes air pockets 112 having a square cross section as shown and air pockets having a triangular cross section. The portion where the air pocket 112 is opened is a portion to be compressed when piping is tightened. The cylindrical main wall body 111 of the sealing portion 32 will be squeezed when the piping 10 is fastened and the cylindrical body 110 positioned at the end of the main wall is moved outwardly And will be installed so as to be in close contact with the connection member 30 and the expanded portion 11 of the pipe.

5 is a cross-sectional view of an auxiliary connector 30 according to another embodiment of the present invention. According to the present embodiment, the auxiliary connector 30 is injection molded as rubber or synthetic resin.

The auxiliary connector 30 includes an inner tube 122 located in the interior of the intubation section 31, an outer tube 123 inserted in the outer side of the intubation section 31, And a cone cylinder 120 shaped like a dish and spreading toward the end. The inner tube 122, the outer tube 123 and the conical tube 120 are integrally connected to each other through a transverse plate 121 connected to the intubating section 31. According to such a configuration, the auxiliary connection (30) is closely installed at the end of the pipe to receive a strong pressing force when the pipe is assembled, and thus the airtightness is further improved.

Reference numeral 12 denotes a protective cover which is press-fitted to the outer circumferential surface of the pipe, and is a shrinkable tube or the like. The protective cover 12 intervenes between the clamping nut 20 and the pipe 10 to prevent mechanical damage between the pipe 10 and the clamping nut 20 due to vibration or the like.

The above description is only an example based on the technical idea of the present invention. Those skilled in the art will recognize that various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims. For example, all embodiments described above may be freely combined and practiced by those skilled in the art, and any combination thereof should be construed as being included within the scope of the present invention.

10: Piping 11: Expansion part
12: protective cover 20: fastening nut
21: Jaw 22: Female thread
23: fastening hole 30:
31: intubation part 32: sealing part
40: connecting body 41: bolt fastening part
42: male thread 44: tapered portion
112: air pocket 110: cylindrical body
120: cone cylinder 122: inner tube
123: outer tube

Claims (4)

A connecting body provided with a bolt fastening portion in a direction toward the pipe as an object to which the pipe is to be connected;
Wherein the bolt fastening part is provided with a female screw which is inserted into the pipe before the end of the pipe is expanded and which is fastened to the bolt fastening part in a direction toward the connecting body, A fastening nut provided at an end of the fastening nut; And
And an auxiliary connecting portion having a sealing portion provided at an end portion of the intubating portion and interposed between the inner circumferential surface of the extending portion and the bolt connecting portion, the connecting portion being connected to an expanded end portion of the pipe, ;
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Wherein the sealing part is made of rubber or synthetic resin and has at least one air pocket along the circumferential direction at an intermediate portion thereof.
The method according to claim 1,
Wherein the sealing part of the auxiliary connector is formed to extend in one side of the single pipe, and the sealing part is formed in the same shape as the pipe-expanding part to expand the pipe-expanding part of the pipe.
delete The apparatus of claim 1, wherein the sealing portion comprises:
An inner tube which is made of rubber or synthetic resin and is fitted in the inside of the intubating section;
An outer tube fitted to the outside of the intubation section;
And a conical cylinder shaped like a dish so as to correspond to the above-mentioned expanded portion;
Wherein the inner tube, the outer tube, and the conical tube are integrally connected through a transverse plate connected to the intubating section.

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