Pipeline connecting structure

Abstract

The invention provides a pipeline connecting structure which comprises a main body, a clamp spring capable of clamping an inserted pipe is clamped in the main body, a top sleeve movably jacking the clamp spring to enable the clamp spring to be opened is arranged in the main body, a hollow structure allowing the pipe to penetrate through is arranged on the top sleeve, and a protrusion is arranged on the outer wall, inserted into the main body, of the top sleeve. The inner wall of the main body is provided with a limiting part for limiting the separation of the top sleeve, after the top sleeve is inserted into the main body, the position of the top sleeve on the bulge is forcibly expanded through an expanding tool, so that the top sleeve can be clamped with the main body, the top sleeve can axially move after being clamped with the main body, and the end part of the top sleeve is provided with a pushing part for pushing the clamp spring; and the top sleeve moves to push the clamp spring so as to separate the clamp spring from the pipe to relieve the limitation of pulling out the pipe. By utilizing the ductility of metal, the top sleeve is forcibly expanded after being inserted, so that the top sleeve and the main body are in very firm clamping fit, the top sleeve can bear great pressure and cannot be separated, and the product quality is greatly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipeline connection, and specifically relates to a pipeline connection structure. BACKGROUND

[0002] At present, the pipeline connector usually utilizes an elastic member to press and connect a pipe, and the quick release component is connected with the connector body through buckling connection. The connector with the structure can only bear a pressure of about 1-6 MPa, and thus is prone to leakage or falling off, and is difficult to meet the market demand. SUMMARY

[0003] The application solves the technical problem of how to improve the pressure bearing between the connector and the pipeline.

[0004] To achieve the above object, the application provides the following technical scheme.

[0005] The pipeline connection structure comprises a main body, a clamping spring capable of clamping a pipe inserted into the main body, a top sleeve provided in the main body and capable of moving to press and open the clamping spring, a hollow structure provided on the top sleeve and capable of allowing the pipe to pass through, a protrusion provided on the outer wall of the part into which the top sleeve is inserted, and a limiting part provided on the inner wall of the main body and capable of limiting the top sleeve from being pulled out.

[0006] Preferably, the protrusion is arranged around the top sleeve, and the side wall of the top sleeve is free of openings.

[0007] Preferably, the clamping spring comprises a clamping part clamped in a ring groove in the main body and a locking part extending inwardly and arranged to form a barb in the direction of the pipe insertion, and the clamping spring is made of elastic material.

[0008] Preferably, the locking part is a plurality of locking parts, and the locking parts are uniformly distributed on the inner wall of the clamping part.

[0009] Preferably, the locking part has an inclination angle of any value between 30 and 75 degrees.

[0010] Preferably, the top sleeve is made of metal.

[0011] Preferably, a sealing ring is arranged in the main body at a position deeper than the front end of the clamping spring.

[0012] Preferably, the main body is provided with symmetrical top sleeves, clamping springs and sealing rings at both ends.

[0013] Preferably, the limiting part is a protruding ring protruding from the inner wall of the main body.

[0014] The beneficial effect of the present application is that the present application uses the ductility of metal to forcibly expand the top sleeve after insertion, making it very firmly clamped with the main body, which can withstand great pressure without falling out. According to the violent test, the present application can withstand 16 megapascal pressure without tripping, greatly improving product quality. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0016] Figure 2 It is a sectional view of the present application;

[0017] Figure 3 It is a schematic diagram of the structure of the top sleeve of the present application;

[0018] Figure 4 It is a schematic diagram of the structure of the present application.

[0019] BRIEF DESCRIPTION OF DRAWINGS: 100. main body; 101. clamping groove; 102. limiting part; 200. clamping spring; 201. clamping part; 202. lock part; 300. sealing ring; 400. top sleeve; 401. protrusion; 402. pushing part. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] EMBODIMENT

[0022] Please refer to Figures 1-4The utility model discloses a kind of pipe connecting structures shown in the figure, mainly used for the connection of pneumatic pipeline, can be used between the connection of two pipes, also can be used for the connection between valve and pipeline, since the pressure that the application can bear is larger, the application can also be used for the connection of hydraulic pipeline, the connector includes main body 100, main body 100 is circular structure, and at least one end is open hollow structure, the clamping spring 200 that can be inserted into pipe is clamped in main body 100, the inner wall of main body 100 is equipped with the clamping groove 101 for clamping spring 200, clamping spring 200 is clamped into the clamping groove 101 in main body 100 by the pincers of clamping spring 200, sealing ring 300 is provided in the deeper part of the front end of clamping spring 200 in main body 100 in the embodiment, and pipe is sealed with sealing ring 300 after being inserted.It is worth noting that the top sleeve 400 that top pressure clamping spring 200 to make clamping spring 200 open is equipped in main body 100, and top sleeve 400 is hollow structure, the outer wall of the part that top sleeve 400 inserts into main body 100 is equipped with protrusion 401, and the inner wall of main body 100 is equipped with the limiting portion 102 that limits top sleeve 400 to come out, and the limiting portion 102 is the convex ring that protrudes from the inner wall of main body 100 in the embodiment, after top sleeve 400 is inserted into main body 100, top sleeve 400 is forcibly opened at the position of protrusion 401 by opening tool, so that top sleeve 400 can be clamped with main body 100, and after top sleeve 400 is clamped with main body 100, it can be axially movable, and the end of top sleeve 400 is equipped with the pushing part 402 that pushes clamping spring 200, and clamping spring 200 is separated from pipe to release the restriction of pipe pulling out by top sleeve 400 moving in the process.The limiting portion 102 is the convex ring that protrudes from the inner wall of main body 100 in the embodiment, and after protrusion 401 of top sleeve 400 is opened, it can be axially movable on the other side of convex ring, pipe is inserted into main body 100, and sealing ring 300 is sealed, and after pipe is inserted into main body 100, clamping spring 200 will firmly clamp pipe, so that it cannot be pulled out, when pipe needs to be pulled out, first press top sleeve 400, make the pushing part 402 of the end of top sleeve 400 open clamping spring 200, after top sleeve 400 opens clamping spring 200, pipe is not restricted by clamping spring 200 and can be freely pulled out.In order to limit top sleeve 400 to press too deep and damage clamping spring 200, a plurality of step structures are provided on top sleeve 400 in the embodiment, limiting is generated between these step structures and the end surface and / or convex ring of main body 100, to protect clamping spring 200 from being excessively pressed, and improve the service life of clamping spring 200.

[0023] The protrusion 401 on the top sleeve 400 in the embodiment is provided around the top sleeve 400, which further ensures that the pressure that can be borne is larger, and the sidewall of the top sleeve 400 in the embodiment has no opening, so that the top sleeve 400 is not easy to be deformed by external force, further improving the pressure that the top sleeve 400 can bear.

[0024] The clamping spring 200 in the embodiment includes a clamping portion 201 clamped in the ring groove in the main body 100 and a locking portion 202 extending inwardly and arranged obliquely to the pipe insertion direction to form a barb. The clamping spring 200 is of elastic material as a whole, and the clamping spring 200 in the embodiment is a metal sheet. The locking portion 202 is a plurality of portions and is uniformly distributed on the inner wall of the clamping portion 201. The oblique angle of the locking portion 202 is any value between 30-75 degrees. The elasticity and angle of the locking portion 202 of the clamping spring 200 can ensure that the pipe can be easily inserted and that the pipe will not be separated from the clamping spring 200 when subjected to a large internal pressure. The pipe will move in the direction of being pulled out when subjected to internal pressure, and will press the clamping spring 200 in the movement process. The rear end of the clamping spring 200 cannot continue to move in this direction due to the influence of the top sleeve 400, and thus can withstand a large pressure. In the embodiment, the violent test can withstand a pressure of 16 MPa without being pulled out.

[0025] The top sleeve 400 in the embodiment is of metal material, and the inherent characteristics of the metal material are used to generate stretching or deformation when subjected to strong pressure, so that the position of the protrusion 401 of the top sleeve 400 is expanded, and thus a clamping is formed. The expansion tool in the embodiment includes a plurality of radial movable expansion blocks. The expansion blocks are driven to move outward from the inside to forcibly expand the protrusion 401 of the top sleeve 400. After expansion, the expansion blocks are retracted and then withdrawn from the main body 100. The radial movement of the expansion blocks can be achieved by pushing with an axially movable conical rod. When the position of the conical rod with a large diameter moves to the position of the expansion blocks, the expansion blocks will be pushed to move radially. The axial movement of the conical rod is driven by a motor or a cylinder. The expansion tool in the application is a conventional technology, which is widely used in the mechanical field, and will not be described in detail here.

[0026] The main body 100 in the embodiment is provided with symmetrical top sleeves 400, clamping springs 200 and sealing rings 300 at both ends, so that the pipe can be inserted into the main body 100 at both ends.

Claims

1. A pipe connection structure, comprising a main body (100), characterized in that: The main body (100) is fitted with a retaining spring (200) that can hold an inserted tube. The main body (100) also has a movable top sleeve (400) that presses against the retaining spring (200) to open it. The top sleeve (400) has a hollow structure for the tube to pass through. The outer wall of the portion of the top sleeve (400) inserted into the main body (100) has a protrusion (401). The inner wall of the main body (100) has a limiting part (102) that restricts the top sleeve (400) from dislodging. 00) After inserting the main body (100), the top sleeve (400) is forcibly opened at the position of the protrusion (401) by the spreading tool so that the top sleeve (400) can be engaged with the main body (100). After the top sleeve (400) is engaged with the main body (100), it can move axially. The end of the top sleeve (400) is provided with a pushing part (402) of the pushing spring (200). When the top sleeve (400) moves, it pushes the spring (200) to separate the spring (200) from the tube to release the restriction of the tube being pulled out.

2. The pipe connection structure as described in claim 1, characterized in that: The protrusion (401) is arranged around the top sleeve (400) in a circle, and the side wall of the top sleeve (400) has no opening.

3. The pipe connection structure as described in claim 1, characterized in that: The snap ring (200) includes a snap-fit ​​part (201) that snaps into the inner annular groove of the main body (100) and a locking part (202) that extends inward and is inclined in the direction of tube insertion to form barbs. The snap ring (200) is made of elastic material.

4. The pipe connection structure as described in claim 3, characterized in that: There are multiple locking parts (202), which are evenly distributed on the inner wall of the snap-fit ​​part (201).

5. The pipe connection structure as described in claim 4, characterized in that: The angle of inclination of the latch (202) is any value between 30 and 75 degrees.

6. A pipe connection structure as described in any one of claims 1-5, characterized in that: The top sleeve (400) is made of metal.

7. The pipe connection structure as described in claim 6, characterized in that: A sealing ring (300) is provided deeper inside the main body (100) at the front end of the snap ring (200).

8. The pipe connection structure as described in claim 7, characterized in that: The main body (100) is provided with symmetrical top sleeves (400), snap rings (200) and sealing rings (300) at both ends.

9. The pipe connection structure as described in claim 1, characterized in that: The limiting part (102) is a protruding ring that protrudes from the inner wall of the main body (100).

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