CN107461560B

CN107461560B - Self-anchoring interface

Info

Publication number: CN107461560B
Application number: CN201710882258.2A
Authority: CN
Inventors: 王嵩; 车蕾; 王莹; 徐军; 李军
Original assignee: Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2017-09-26
Filing date: 2017-09-26
Publication date: 2023-11-28
Anticipated expiration: 2037-09-26
Also published as: CN107461560A

Abstract

The invention discloses a self-anchoring interface, which relates to the technical field of pipeline connection and comprises a bell mouth, a socket and a self-anchoring sliding body, wherein a sealing bin is arranged at the front section of the bell mouth, a sliding bin is arranged at the middle section of the bell mouth, a penetrating bin is arranged at the rear section of the bell mouth, a sealing rubber ring is arranged in the sealing bin, and the self-anchoring sliding body can slide along the inner wall of the sliding bin in the sliding bin; the self-anchored sliding body comprises a fixed body, a stop block, a tooth piece and a rubber connecting body, wherein the inside of the fixed body is hollow to form a containing bin, the stop block, the tooth piece and the rubber connecting body are contained in the containing bin, the stop block is provided with an inclined surface, the tooth piece and the rubber connecting body are sequentially arranged on the inclined surface in an array mode, the tooth part of the tooth piece is abutted to the outer wall of the socket, and the tooth piece slides along the inclined surface to extrude the rubber connecting body when being subjected to the pressure of the outer wall of the socket. The invention ensures that the whole pipeline has flexibility and stronger axial scalability, and can avoid the problems of structural damage, self-anchor failure, interface pull-out and the like caused by external force action.

Description

Self-anchoring interface

Technical Field

The invention relates to the technical field of pipeline connection, in particular to a telescopic self-anchoring interface.

Background

Conventional pipe joints require a self-anchoring structure at the joint for connection stability. The pipeline interface with the self-anchored structure has simple structure and convenient installation, and has wide application in the fields of municipal engineering, oil and gas transmission and the like.

Since the self-anchored interface generally needs to ensure that the interface can achieve a degree of free deflection, the interface is not allowed to undergo significant axial expansion. For example, chinese patent CN102297297a discloses a socket pipe joint with an anchoring structure, which allows only a very small amount of axial expansion after installation. And as in U.S. patent document US5269569a, after the socket is inserted into the bell mouth, when the socket is pulled out, the steel teeth are embedded into the outer wall of the socket end of the pipe, the purpose of limiting the socket to be pulled out from the bell mouth is achieved by utilizing the embedding force of the steel teeth of the pipe, and the axial expansion of the interface is completely not allowed after the installation of the interface is completed.

For the case of general geological conditions or foundations with a small range of differential settlement, a general self-anchored interface can meet the requirements. However, when the uneven settlement of the foundation is large, such as when a pipeline is laid above a goaf of a coal mine or passes through a living fault, the huge force of geological action can cause the structure damage, self-anchor failure, interface pulling-out and the like of a general self-anchor interface.

Disclosure of Invention

The invention aims to provide a self-anchoring interface which can solve the problems of structural damage, self-anchoring failure, interface pull-out and the like caused by external force in the prior art.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the invention is as follows: a self-anchoring interface, which comprises a bell mouth and a socket for inserting the bell mouth, wherein the front section of the bell mouth is provided with a sealing bin, the middle section is provided with a sliding bin, the rear section is provided with an extending bin, the sealing bin is internally provided with a sealing rubber ring,

the self-anchoring sliding body is arranged between the bell mouth and the spigot and slides along the inner wall of the sliding bin when being extruded by the spigot in the sliding bin;

the self-anchored sliding body comprises a fixing body, a stop block, a tooth piece and a rubber connecting body, wherein a containing bin is formed in the hollow mode in the fixing body, the stop block, the tooth piece and the rubber connecting body are contained in the containing bin, the stop block is provided with an inclined surface, the tooth piece and the rubber connecting body are sequentially arranged on the inclined surface, the tooth part of the tooth piece is propped against the outer wall of the socket, and the tooth piece slides and extrudes along the inclined surface when being stressed by the outer wall of the socket.

Further, the shape of the outer surface of the front part of the fixed body is matched with the front part of the sliding cabin.

Further, the shape of the outer surface of the rear part of the fixed body is matched with the rear part of the sliding cabin.

Further, the outer top surface of the fixed body and the inner top surface of the sliding bin are arc surfaces with the same radian.

Further, the inclined plane of the stop block is 20-70 degrees relative to the axis of the pipeline.

Further, the fixing body, the stop block and the tooth piece are all made of hard materials.

The beneficial effects of the invention are as follows:

the interface allows axial expansion to a greater extent, can be matched with a common self-anchoring interface to be used together, so that the whole pipeline has flexibility and stronger axial expansion, and the problems of structural damage, self-anchoring failure, interface pull-out and the like caused by external force action can be avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a self-anchoring interface provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is a cross-sectional view of a socket in an embodiment of the invention;

FIG. 4 is a cross-sectional view of a self-anchoring slider in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a fixture according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a stop in an embodiment of the invention;

FIG. 7 is a schematic diagram of the structure of the present invention before connection;

FIG. 8 is a schematic diagram illustrating the structure of an interface connection process according to an embodiment of the present invention;

FIG. 9 is a schematic view of the structure of the interface according to the embodiment of the present invention in an axially extended state after connection;

fig. 10 is a schematic structural diagram of the interface in an axially pulled-out state after connection according to an embodiment of the present invention.

The correspondence between the reference numerals and the component names in the above figures is:

1, a socket; 11, sealing the bin; 12 sliding bins; 13 extending into the bin; 2 sockets; 3 self-anchoring slider; 31 a fixed body; 311 accommodating bins; 32 stops; 321 inclined plane; 33 teeth; 34 a rubber connector; 4 sealing rubber rings.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1-6, the self-anchoring interface provided by the embodiment of the invention comprises a socket 1 and a spigot 2 for inserting into the socket 1, wherein the front section of the socket 1 is provided with a sealing bin 11, the middle section is provided with a sliding bin 12, the rear section is provided with a stretching bin 13, the sealing bin 11 is internally provided with a sealing rubber ring 4, the self-anchoring interface also comprises a self-anchoring sliding body 3 arranged between the socket and the spigot, the thickness of the self-anchoring sliding body 3 in the radial direction is slightly larger than the height of a radial gap formed between the inner top surface of the sliding bin 12 and the outer wall of the spigot 2 when the spigot 2 is inserted into the socket 1, and the self-anchoring sliding body 3 slides along the inner wall of the sliding bin 12 when being extruded by the spigot 2 in the sliding bin 12; the self-anchored sliding body 3 comprises a fixed body 31, a stop block 32, a tooth piece 33 and a rubber connecting body 34, wherein an accommodating bin 311 is formed in the hollow inside of the fixed body 31, the stop block 32, the tooth piece 33 and the rubber connecting body 34 are accommodated in the accommodating bin 311, the stop block 32 is provided with an inclined surface 321, the tooth piece 33 is arranged on the inclined surface 321 during production, and the structural stability is ensured by utilizing the characteristics of a rubber production process and bonding the fixed body 31, the stop block 32 and the tooth piece 33 as a whole. The teeth of the tooth 33 are abutted against the outer wall of the socket 2, and when the tooth 33 is pressed by the outer wall of the socket 2, the tooth slides along the inclined surface 321 to press the compressed rubber connector 34.

Referring to fig. 7 and 8, before connecting the self-anchoring interface provided by the embodiment of the present invention, the sealing rubber ring 4 is first installed in the sealing cabin 11, and the self-anchoring sliding body 3 is installed in the sliding cabin 12. Since the thickness of the self-anchoring sliding body 3 in the radial direction is slightly larger than the height of the radial gap formed between the inner top surface of the sliding cabin 12 and the outer wall of the socket 2 after the interface is installed, in the process of inserting the socket 2 into the socket 1, the tooth piece 33 is stressed on the front surface, and the tooth piece 33 transmits the pressure to the stop block 32 and the rubber connector 34, so that the pressure is transmitted to the fixed body 31, and finally the sliding cabin 12. Due to the restraining action of the sliding cabin 12, the tooth 33 slides along the inclined surface 321, so that the compression rubber connector 34 is compressed under force, and the tooth 33 is pressed against the outer wall of the socket 2 under the pressure generated by the compression of the rubber connector 34. With the socket 2 extending continuously, the installation is completed when the teeth are all in contact with the outer wall of the socket 2, as shown in fig. 1.

Referring to fig. 9 and 10, when the pipe joint is influenced by the outside to move the mouthpiece 1 and the socket 2 relatively, as shown in fig. 9, the front end portion of the socket 2 is inserted into the insertion chamber 13. The interface has a certain degree of axial extension. When the pipe joint is affected by the outside, so that the socket 1 and the spigot 2 move in opposite directions, as shown in fig. 10, the tooth portion is embedded into the outer wall of the spigot 2, and as the spigot 2 moves, the self-anchoring sliding body 3 slides from the rear part of the sliding cabin 12 to the front part, and then further movement of the spigot 2 is prevented, so that the joint has a self-anchoring function and a certain degree of axial pulling-out function.

Obviously, in the invention, the self-anchored sliding body 3 is of an integral structure, and is convenient to use when being installed on site. The rubber link 34 has elasticity so that the tooth 33 can compress the rubber link 34 and slide along the inclined surface 321 of the stopper 32 when being pressed.

In summary, the self-anchoring interface provided by the embodiment of the invention allows a larger degree of axial expansion and contraction, and can be used together with a common self-anchoring interface, so that the whole pipeline has flexibility and stronger axial expansion and contraction, and the problems of structural damage, self-anchoring failure, interface pull-out and the like caused by external force action can be avoided.

Since the width of the self-anchoring slider 3 is smaller than the width of the sliding cabin 12, the self-anchoring slider 3 may be installed at the front, rear or any position therebetween of the sliding cabin 12, preferably at the rear.

In one embodiment of the present invention, the shape of the front outer surface of the fixed body 31 is adapted to the front of the sliding compartment 12. The shape of the rear outer surface of the fixed body 31 is adapted to the rear of the sliding compartment 12. This ensures that the self-anchoring slider 3 is in a stable stressed condition when slid to the front or rear of the sliding magazine 12. The outer top surface of the fixed body 31 and the inner top surface of the sliding cabin 12 are arc surfaces with the same radian. When the self-anchoring slider 3 is mounted into the sliding compartment 12 in the socket 1, it can effectively fit together, and the self-anchoring slider 3 can translate on the sliding compartment 12 along the axial direction of the pipe, so that the interface has a strong axial expansion and contraction capability.

The inclined surface 321 of the stop block 32 has an included angle alpha of 20-70 degrees relative to the axis of the pipeline. Too large an included angle can easily cause the tooth 33 to turn over in the installation process, the self-anchor fails, too small an included angle can cause too large installation resistance, and the tooth 33 is in a stable state when the tooth 33 can slide by 20-70 degrees. In a preferred embodiment of the invention, α is 45 degrees

In one embodiment of the invention, the fixed body 31, stop 32 and tooth 33 are all of a hard material, and in a preferred embodiment, are stainless steel materials.

The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. The self-anchoring interface comprises a socket (1) and a jack (2) for inserting the socket (1), wherein the front section of the socket (1) is provided with a sealing bin (11), the middle section of the socket is provided with a sliding bin (12), the rear section of the socket is provided with an extending bin (13), the sealing bin (11) is internally provided with a sealing rubber ring (4) and is characterized in that,

the self-anchoring sliding body (3) is arranged between the bell mouth and the spigot, and the self-anchoring sliding body (3) is tightly attached to the inner wall of the sliding bin (12) and slides along the axial direction of the bell mouth (1) when being extruded by the spigot in the sliding bin (12);

the self-anchored sliding body (3) comprises a fixed body (31), a stop block (32), a tooth piece (33) and a rubber connecting body (34), wherein a containing bin (311) is formed in the hollow mode inside the fixed body (31), the stop block (32), the tooth piece (33) and the rubber connecting body (34) are contained in the containing bin (311), the stop block (32) is provided with an inclined surface (321), the tooth piece (33) and the rubber connecting body (34) are sequentially arranged on the inclined surface (321), the tooth part of the tooth piece (33) is propped against the outer wall of the socket (2), and the tooth piece (33) is extruded along the inclined surface (321) in a sliding mode when being stressed by the outer wall of the socket (2).

2. Self-anchoring interface according to claim 1, characterized in that the shape of the external surface of the front part of the fixed body (31) is adapted to the front part of the sliding cartridge (12).

3. Self-anchoring interface according to claim 1, characterized in that the shape of the rear outer surface of the fixed body (31) is adapted to the rear of the sliding cartridge (12).

4. The self-anchoring interface according to claim 1, characterized in that the outer top surface of the fixed body (31) and the inner top surface of the sliding cabin (12) are arc surfaces with the same radian.

5. A self-anchoring interface according to claim 1, characterized in that the inclined surface (321) of the stop (32) has an angle α of 20 ° to 70 ° with respect to the axis of the pipe.

6. Self-anchoring interface according to claim 1, characterized in that the fixing body (31), the stop (32) and the tooth (33) are all of a hard material.