Socket type transition fit tooth groove self-locking type double-sealing pipeline connecting structure

Abstract

The utility model discloses a socket type transition fit tooth groove self-locking type double-sealing pipeline connecting structure, which belongs to the field of pipeline connecting structures, and comprises a pipe and a connecting pipe, the connecting pipe is provided with a socket head, and the pipe is provided with a socket opening; at least three retaining teeth are arranged on the outer wall of the socket and spigot head and used for sealing and fixing the position after the connecting pipe and the pipe are connected, and water seepage and falling off after the connecting pipe and the pipe are connected are prevented; a circle of sealing waterproof adhesive tape II is fixedly mounted on the retaining tooth on the innermost side and is used for realizing internal sealing after the connecting pipe is connected with the pipe; after the connecting pipe is connected with the pipe, the sealing waterproof adhesive tape II abuts against the inner wall of the pipe; by means of the mode, fixed connection can be achieved in the self-locking mode of the retaining teeth and the groove in the socket, the slippage risk caused by stress relaxation is avoided, the inner wall of the socket and the outer wall of the socket are in transition fit, and the spalling risk under the temperature change or external force action is avoided.

Description

Technical Field

[0001] The utility model relates to the field of pipeline connection structures, in particular to a socket-and-spigot transition fit tooth-groove self-locking double-sealed pipeline connection structure. Background Art

[0002] Socket joints have important application value in the field of pipeline connection. At present, socket joints are widely used in petrochemical, chemical, heating, water supply, drainage and other fields, and are gradually being used in emerging fields such as biomedicine, aerospace and other fields. The scope of application is gradually expanding. Moreover, with the development of science and technology and the improvement of technology, the production process and quality control of socket joints have been significantly improved, meeting the high requirements of more precise production process, more consistent molding, and stable and reliable product quality.

[0003] Chinese patent CN215568763U discloses a socket-and-spigot self-sealing pipe connection structure with a rigid-flexible interference fit, comprising a flexible pipe fitting and a rigid pipe connecting pipe, wherein socket plugs are provided at both ends of the pipe connecting pipe, and a socket interface is provided on the inner side of one or both ends of the pipe fitting, wherein the outer diameter of the socket plug and the inner diameter of the socket interface are interference fit, and the pipe fitting and the pipe connecting pipe are connected by inserting the socket plug into the socket interface; the utility model adopts interference fit self-sealing, and there is no risk of leakage during installation; a retaining tooth is provided on the socket plug to improve the tensile strength after the pipe fitting and the pipe connecting pipe are connected; a baffle is provided in the middle of the pipe connecting pipe to ensure that the socket plug and the socket interface are in place, and the baffle directly presses on the end of the pipe fitting, facilitating pipe jacking construction; the problem of easy bursting of rigid material joints during jacking correction is solved, and the problem of poor force at the flexible pipe connecting pipe interface is solved; and the problem of corrosion protection of the inner wall of the pipe connecting pipe is solved; however, the following problems still exist in this technology:

[0004] 1. This device is connected by an interference fit between the retaining teeth on the rigid pipe socket and the inner wall of the socket of the flexible pipe fitting, causing the socket wall to produce elastic deformation, which in turn causes the socket wall to produce radial compressive stress on the retaining teeth, and ultimately generates friction between the socket wall and the retaining teeth to achieve fixation and prevent relative slippage. However, HDPE, as a polymer material, has viscoelastic properties. The deformation of the material includes elastic deformation and plastic deformation. Under the influence of loading and temperature changes, the plastic deformation will gradually increase over time, while the elastic deformation will decrease accordingly, resulting in a slow decrease in total stress over time, that is, stress relaxation will occur, and the friction between the retaining teeth and the inner wall of the socket will gradually decrease. As time accumulates, there is a risk of slippage at the pipe connection point.

[0005] 2. HDPE, short for high-density polyethylene, is a thermoplastic. Made from the polymerization of ethylene monomers, it features high density, high crystallinity, high strength, and rigidity. At room temperature, HDPE is a rigid, non-elastic material. The device uses an interference fit for connection, which can easily cause the elastic deformation of the pipe wall at the receiving end to reach its elastic limit (or leave a small residual elastic deformation margin). This creates a risk of cracking at the receiving end due to temperature changes or external forces (primarily shear force, bending moment, and pressure).

[0006] 3. The device achieves self-sealing by seamlessly connecting the outer edge of the stop tooth with the inner wall of the socket. It has high requirements on the roundness and integrity of the outer edge of the stop tooth, as well as on the casting accuracy and protection of the finished product during transportation and construction. However, during transportation and construction, due to the action of external forces, there is a risk of deformation of the outer edge of the stop tooth, and it cannot ensure seamless connection between the outer edge of the stop tooth and the inner wall of the socket. Moreover, as stress relaxation of the socket occurs, the fit between the outer edge of the stop tooth and the inner wall of the socket will also decrease, posing a certain risk of leakage.

[0007] Based on this, the utility model designs a socket-and-spigot transition fit tooth-groove self-locking double-sealed pipe connection structure to solve the above problems. Utility Model Content

[0008] In view of the above-mentioned shortcomings of the prior art, the utility model provides a socket-and-spigot transition fit tooth-and-groove self-locking double-sealed pipe connection structure.

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] A socket-and-spigot transition fit tooth-groove self-locking double-sealed pipe connection structure, comprising a pipe and a connecting pipe;

[0011] The connecting pipe is fixed with two sets of sockets for connecting with pipes, and the two sets of sockets are symmetrically arranged at the left and right ends of the connecting pipe;

[0012] The inner side walls at both ends of the pipe are provided with a socket for connecting to the connecting pipe;

[0013] The outer wall of the socket is fixedly installed with at least three anti-retraction teeth; except for the innermost anti-retraction tooth, the outer walls of all anti-retraction teeth are fixedly connected with a sealing waterproof tape 1, which is a flexible material; the outer wall of the innermost anti-retraction tooth is fixedly installed with a circle of sealing waterproof tape 2;

[0014] The inner side wall of the receiving port is provided with at least two groups of grooves for cooperating with the anti-retraction teeth to fix the position of the connecting pipe and the pipe after connection, and prevent the connecting pipe from falling off after connection with the pipe.

[0015] Furthermore, the pipe is made of HPDE, PVC-M or PVC-U solid wall pipe.

[0016] Furthermore, the connecting pipe is made of a metal material having a higher rigidity than the pipe material.

[0017] Furthermore, the second center line of the sealing waterproof tape coincides with the outer edge of the first anti-recession tooth, the sealing waterproof tape is attached to the slope surface of the anti-recession tooth, and one side of the sealing waterproof tape coincides with the outer edge of the anti-recession tooth.

[0018] Furthermore, the second sealing waterproof tape and the first sealing waterproof tape are made of pure butyl tape.

[0019] Furthermore, the thickness of the sealing and waterproof tape 1 is half the depth of the groove, and the depth of the groove is consistent with the height of the retaining tooth.

[0020] Furthermore, the anti-retraction teeth are arranged at intervals of two centimeters.

[0021] Furthermore, the width of the stop tooth is not less than one centimeter and the height is not less than 0.5 centimeters.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can realize a fixed connection by self-locking the stop teeth and the groove in the socket, thereby avoiding the risk of slippage caused by stress relaxation;

[0023] 2. The utility model can achieve a transitional fit between the inner wall of the socket and the outer wall of the socket plug, which reserves more elastic deformation margin for the outer wall of the socket, avoids the risk of expansion and cracking under temperature changes or external forces (mainly shear force, bending moment, pressure), and has higher reliability;

[0024] 3. The utility model can achieve sealing through the transition fit between the outer wall of the socket plug and the inner wall of the socket interface. The sealing contact surface is all the contact surfaces between the outer wall of the socket plug and the inner wall of the socket interface, that is, surface sealing; at the same time, an elastic sealing tape is used to fill the gap between the groove and the backstop tooth and other gaps. The elastic deformation of the elastic sealing tape can make up for the defects of the outer edge of the backstop tooth. The requirements for the roundness and integrity of the outer edge of the backstop tooth are low, and the requirements for casting accuracy and protection of finished products during transportation and construction are low. The sealing method is safer and the effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0026] Figure 1 The utility model is a socket-type transition fit tooth groove self-locking double-sealed pipe connection structure without the installation of sealing waterproof tape 1 and sealing waterproof tape 2 three-dimensional Figure 1 ;

[0027] Figure 2 It is a front view of a socket-and-spigot transition fit tooth-groove self-locking double-sealed pipe connection structure without the first sealing and waterproof tapes and the second sealing and waterproof tapes installed;

[0028] Figure 3 It is a left side view of a socket-and-spigot transition fit tooth-groove self-locking double-sealed pipe connection structure of the present invention without the first sealing and waterproof tapes and the second sealing and waterproof tapes installed;

[0029] Figure 4 To follow Figure 3 A partial stereogram with a portion of AA removed;

[0030] Figure 5 This is a structural diagram of the connecting pipe when one end is connected to the other end and disassembled.

[0031] The numbers in the figure represent:

[0032] 1. Pipe; 2. Connecting pipe; 3. Anti-retraction tooth; 4. Groove; 5. Sealing waterproof tape 1; 6. Sealing waterproof tape 2; 7. Socket; 8. Socket joint. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0035] Example 1: In some embodiments, please refer to the accompanying drawings of the specification. Figure 1-Figure 5 , a socket-and-spigot transition fit tooth-groove self-locking double-sealed pipe connection structure, comprising a pipe 1 and a connecting pipe 2;

[0036] The connecting pipe 2 is fixed with two sets of sockets 7 for connecting with the pipe 1. The two sets of sockets 7 are symmetrically arranged at the left and right ends of the connecting pipe 2.

[0037] The inner side walls of both ends of the pipe 1 are provided with a socket 8 for connecting to the connecting pipe 2;

[0038] The outer wall of the socket 7 is provided with at least three anti-recession teeth 3, which are used to seal and fix the connection pipe 2 and the pipe 1 after they are connected, so as to prevent water seepage and falling off after the connection pipe 2 and the pipe 1 are connected; except for the innermost anti-recession tooth 3, the outer walls of all anti-recession teeth 3 are fixedly connected with a sealing waterproof tape 5, which is a flexible material. The sealing waterproof tape 5 is used to seal the connection pipe 2 and the pipe 1 after they are connected through the groove 4 and the anti-recession tooth 3, so as to prevent water seepage after the connection pipe 2 and the pipe 1 are connected; the outer wall of the innermost anti-recession tooth 3 is fixedly installed with a circle of sealing waterproof tape 2 6 to achieve internal sealing after the connection pipe 2 and the pipe 1 are connected;

[0039] The inner side wall of the receiving port 8 is provided with at least two groups of grooves 4 for cooperating with the anti-retraction teeth 3 to fix the connection pipe 2 and the pipe 1 in a fixed position after connection to prevent them from falling off;

[0040] The operator pushes the socket plug 7 on the connecting pipe 2 into the socket 8 on the pipe 1. The multiple anti-recession teeth 3 near one end of the pipe 1 push the sealing waterproof tape 5 to fit together with the groove 4, and the anti-recession teeth 3 squeeze the side wall sealing waterproof tape 5 to deform the sealing waterproof tape 5 and block the gap between the groove 4 and the anti-recession teeth 3 to achieve sealing. At the same time, the sealing waterproof tape 2 6 and the inner side wall of the pipe 1 squeeze each other, causing the sealing waterproof tape 2 6 to deform and block all gaps between the connecting pipe 2 and the pipe 1 to achieve sealing.

[0041] The utility model can realize a fixed connection between the anti-recession tooth 3 and the inner groove 4 of the socket interface 8 in a self-locking manner, avoiding the risk of slippage caused by stress relaxation; it can also realize a transition fit state between the inner wall of the socket interface 8 and the outer wall of the socket plug 7, retaining more elastic deformation margin for the outer wall of the socket interface 8, avoiding the risk of bursting under temperature changes or external forces (mainly shear force, bending moment, pressure); it can also realize sealing through the transition fit of the outer wall of the socket plug 7 and the inner wall of the socket interface 8, and the sealing contact surface is all the contact surfaces between the outer wall of the socket plug 7 and the inner wall of the socket interface 8, that is, a face seal; at the same time, an elastic sealing tape is used to fill the gap between the groove 4 and the anti-recession tooth 3 and other gaps, and the elastic deformation of the elastic sealing tape can make up for the defects of the outer edge of the anti-recession tooth 3, and has low requirements on the roundness and integrity of the outer edge of the anti-recession tooth 3, low requirements on casting accuracy and protection of finished products during transportation and construction, and the sealing means is safer.

[0042] The pipe 1 is a solid wall pipe made of HPDE, PVC-M or PVC-U;

[0043] The connecting pipe 2 is made of cast iron or aluminum alloy metal material with greater rigidity than the pipe 1;

[0044] The center line of the sealing waterproof tape 2 6 coincides with the outer edge of the first anti-recession tooth 3 , and the sealing waterproof tape 1 5 is attached to the slope surface of the anti-recession tooth 3 , and one side of the sealing waterproof tape 1 5 coincides with the outer edge of the anti-recession tooth 3 .

[0045] The sealing waterproof tape 2 6 and the sealing waterproof tape 1 5 are made of pure butyl tape; the sealing waterproof tape 2 6 and the sealing waterproof tape 1 5 are deformed and block all gaps between the connecting pipe 2 and the pipe 1;

[0046] The thickness of the sealing and waterproof tape 5 can be half the depth of the groove 4, and the depth of the groove 4 can be consistent with the height of the stop tooth 3; to avoid the situation where the stop tooth 3 and the groove 4 cannot be clamped due to the sealing and waterproof tape 5 being too thick or the sealing and waterproof tape 5 being too thin to produce sufficient deformation to achieve sealing;

[0047] The stop teeth 3 are spaced two centimeters apart so that the sealing waterproof tape 5 has enough space for deformation.

[0048] The width of the anti-recession tooth 3 should not be less than 1 cm and the height should not be less than 0.5 cm to avoid the anti-recession tooth 3 being unable to clamp the groove 4 due to being too small.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A socket-and-spigot transition fit, tooth-and-groove self-locking double-sealed pipe connection structure, comprising a pipe (1) and a connecting pipe (2), characterized in that: Two groups of sockets (7) for connecting to the pipe (1) are fixedly provided on the connecting pipe (2), and the two groups of sockets (7) are symmetrically arranged at the left and right ends of the connecting pipe (2); The inner side walls at both ends of the pipe (1) are provided with receiving ports (8) for connection with the connecting pipe (2); The outer wall of the socket (7) is fixedly provided with at least three anti-recoil teeth (3); except for the innermost anti-recoil tooth (3), the outer walls of all anti-recoil teeth (3) are fixedly connected with a sealing waterproof tape (5), and the sealing waterproof tape (5) is a flexible material; the outer wall of the innermost anti-recoil tooth (3) is fixedly provided with a circle of sealing waterproof tape (6); The inner side wall of the receiving port (8) is provided with at least two groups of grooves (4) for cooperating with the stop teeth (3) to fix the position of the connecting pipe (2) and the pipe material (1) after connection to prevent them from falling off after connection.

2. The socket-and-spigot transition fit tooth-and-groove self-locking double-seal pipe connection structure according to claim 1, characterized in that: The pipe (1) is a solid wall pipe made of HPDE, PVC-M or PVC-U.

3. The socket-and-spigot transition fit tooth-and-groove self-locking double-seal pipe connection structure according to claim 2, characterized in that: The connecting pipe (2) is made of a metal material having a higher rigidity than the pipe (1).

4. The socket-and-spigot transition fit tooth-and-groove self-locking double-seal pipe connection structure according to claim 3, characterized in that: The center line of the second sealing waterproof tape (6) coincides with the outer edge of the first anti-recession tooth (3), and the first sealing waterproof tape (5) is attached to the slope of the anti-recession tooth (3), and one side of the first sealing waterproof tape (5) coincides with the outer edge of the anti-recession tooth (3).

5. The socket-and-spigot transition fit tooth-and-groove self-locking double-seal pipe connection structure according to claim 4, characterized in that: The sealing waterproof tape 2 (6) and the sealing waterproof tape 1 (5) are made of pure butyl tape.

6. The socket-and-spigot transition fit tooth-and-groove self-locking double-seal pipe connection structure according to claim 5, characterized in that: The thickness of the sealing and waterproof tape (5) is half the depth of the groove (4), and the depth of the groove (4) is consistent with the height of the stop tooth (3).

7. The socket-and-spigot transition fit tooth-and-groove self-locking double-seal pipe connection structure according to claim 6, characterized in that: The stop teeth (3) are arranged at intervals of two centimeters.

8. The socket-and-spigot transition fit tooth-and-groove self-locking double-seal pipe connection structure according to claim 7, characterized in that: The stop teeth (3) have a width of not less than one centimeter and a height of not less than 0.5 centimeters.

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