A sealed locking and plug-in pipe joint

Abstract

This utility model discloses a sealing, anti-retraction, self-locking socket joint, relating to the field of socket joints. The utility model includes a socket joint with multiple parallel convex rings on its outer wall. Annular grooves are also formed on both sides of the outer wall, with a compensation ring and a sealing ring respectively inside the grooves. This utility model utilizes the elastic compensation effect of the nickel-titanium alloy compensation rings to continuously apply pressure to the sealing ring, compensating for aging or gap changes in the sealing ring, solving the problem of "effective sealing in the short term but failure in the long term," and extending the sealing life. Furthermore, the triangular cross-section of the convex rings has the characteristics of "good guidance and tight fit," facilitating insertion into the matching groove of the socket during installation. After insertion, the hypotenuse of the triangle can form a "barbed" engagement with the inner wall of the groove, resulting in stronger axial resistance and preventing the joint from dislodging due to fluid pressure or vibration.

Description

Technical Field

[0001] This utility model relates to the field of socket joints, specifically a sealing and anti-reverse self-locking socket joint. Background Technology

[0002] A socket joint is a pipe fitting used to connect socketed pipes (pipes with a socket at one end and a spigot at the other). Its core function is to achieve a sealed connection between pipes and prevent media leakage. It also ensures connection stability through anti-locking and self-locking structures. It is widely used in fluid (water, oil, gas, etc.) transportation systems. Its design needs to be compatible with pipe materials (such as cast iron, plastic, and steel pipes), operating pressure and temperature, while taking into account both ease of installation and long-term durability.

[0003] According to Chinese Patent No. CN211289148U, a sealing and anti-reverse self-locking socket pipe joint is disclosed. The plug and socket of this utility model are respectively connected to both ends of the pipe body. When adjacent pipes are spliced, the plug is inserted into the socket. After insertion, the anti-reverse structure connects the plug and socket to form a self-locking structure, providing axial resistance and preventing the plug from separating from the socket. The anti-reverse structure includes a protrusion and a recess. After the plug and socket are inserted, the protrusion and recess cooperate to form the anti-reverse structure. To ensure the sealing of the pipe connection, a sealing ring is provided between the plug and socket. The sealing ring achieves the sealing of the spliced ​​part, and generally includes radial sealing and axial sealing.

[0004] Regarding the aforementioned disclosed patent content, existing joints are equipped with sealing rings to improve the sealing performance between the joint and the pipeline. However, when the sealing ring is used for a long time, it is prone to deformation and shrinkage due to aging, temperature / pressure changes, or increased gap with the joint, leading to fluid leakage and thus reducing the sealing performance between the joint and the pipeline. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a sealing and anti-locking socket pipe joint to solve the technical problem that the sealing ring will deform and compress due to aging after long-term use, thus affecting the sealing performance between the joint and the pipe.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sealing and anti-reverse self-locking socket joint, comprising a socket joint, wherein the outer wall of the socket joint is provided with a plurality of mutually parallel convex rings, and annular grooves are also provided on both sides of the outer wall of the socket joint, wherein a compensation ring and a sealing ring are respectively provided inside the annular grooves.

[0007] By adopting the above technical solution, the socket joint is used to connect two sockets to carry the fluid (water, oil, gas, etc.) transported by the pipeline.

[0008] Furthermore, the outer wall of the socket joint is provided with a middle ring, and the outer wall of the socket joint, the outer wall of the convex ring, and the outer wall of the middle ring are all coated with a coating.

[0009] By adopting the above technical solution, the convex ring is the key structure to achieve "anti-reverse self-locking". After being inserted into the socket of the connecting pipe, the convex ring can fit into the matching structure (such as the groove) on the inner wall of the socket to form axial resistance, prevent the joint from coming out of the socket and ensure connection stability.

[0010] Furthermore, the compensation ring is located deep inside the annular groove, and the outer wall of the compensation ring is in contact with the inner wall of the sealing ring.

[0011] By adopting the above technical solution, the annular groove is used to install the sealing ring and the compensation ring, preventing them from shifting during installation or use.

[0012] Furthermore, the compensation ring is a nickel-titanium alloy compensation ring.

[0013] By adopting the above technical solution, nickel-titanium alloy has excellent elasticity and shape memory effect, which can automatically recover deformation when temperature / pressure changes, continuously apply stable pressure to the sealing ring, effectively compensate for the aging shrinkage or gap increase of the sealing ring, maintain long-term sealing effect, and avoid sealing failure.

[0014] Furthermore, the axial cross-section of the convex ring is triangular.

[0015] By adopting the above technical solution, the triangular cross-section convex ring has the characteristics of "good guidance and tight fit". During installation, it is easy to insert into the matching groove of the socket. After insertion, the hypotenuse of the triangle can form a "barbed" engagement with the inner wall of the groove, which strengthens the axial resistance and prevents the joint from falling out due to fluid pressure or vibration.

[0016] Furthermore, the coating is a polytetrafluoroethylene composite coating.

[0017] By adopting the above technical solution, the coating isolates external corrosive media (such as acid and alkali fluids, air humidity), thereby extending the overall service life of the joint.

[0018] Furthermore, the sealing ring is made of EPDM rubber or fluororubber.

[0019] By adopting the above technical solution, the sealing ring undergoes elastic deformation under pressure, filling the gap between the joint and the connecting pipe, blocking fluid leakage, and achieving the initial sealing function.

[0020] Furthermore, multiple convex rings are equidistantly distributed on the outer wall of the socket joint.

[0021] By adopting the above technical solution, the equidistant distribution ensures that the engagement points of the convex ring and the groove of the socket are evenly stressed, thus avoiding excessive local stress that could lead to deformation of the convex ring or damage to the groove.

[0022] Furthermore, the thickness of the sealing ring is greater than the thickness of the compensation ring.

[0023] In summary, the present invention has the following main advantages:

[0024] 1. This utility model uses the elastic compensation effect of the nickel-titanium alloy compensation ring to continuously apply pressure to the sealing ring, compensate for the aging of the sealing ring or changes in the gap, solve the problem of "effective sealing in the short term but failure in the long term", and extend the sealing life.

[0025] 2. The triangular cross-section convex ring of this utility model has the characteristics of "good guidance and tight fit". During installation, it is easy to insert into the matching groove of the socket. After insertion, the hypotenuse of the triangle can form a "barbed" engagement with the inner wall of the groove, which strengthens the axial resistance and prevents the joint from falling out due to fluid pressure or vibration. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0028] Figure 3 This is a three-dimensional structural diagram of the socket joint of this utility model;

[0029] Figure 4 This is a schematic diagram of the sealing ring structure of this utility model;

[0030] Figure 5 For the present utility model Figure 2 A magnified structural diagram of point A in the middle.

[0031] In the diagram: 1. Socket joint; 2. Convex ring; 3. Middle ring; 4. Annular groove; 5. Sealing ring; 6. Compensating ring; 7. Coating. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] The embodiments of this utility model will be described below based on its overall structure.

[0034] Example 1:

[0035] A sealing, anti-reverse self-locking socket fitting, such as Figures 1-5 As shown, the device includes a socket joint 1, which is used to connect two socket pipes and carries fluids such as water, oil, and gas transported by the pipeline. The outer wall of the socket joint 1 is provided with multiple parallel convex rings 2. Annular grooves 4 are also provided on both sides of the outer wall of the socket joint 1. Compensating rings 6 and sealing rings 5 ​​are respectively provided inside the annular grooves 4. The outer wall of the socket joint 1 is provided with a middle ring 3. The outer walls of the socket joint 1, the outer walls of the convex rings 2, and the outer walls of the middle ring 3 are all coated with a coating 7. The convex rings 2 are the key structure to achieve "self-locking and anti-reverse". After being inserted into the socket of the connecting pipe, the convex rings 2 can fit into the matching structure (such as a groove) on the inner wall of the socket to form axial resistance, preventing the joint from coming out of the socket and ensuring connection stability.

[0036] See Figures 1-5 The compensating ring 6 is located deep inside the annular groove 4. The outer wall of the compensating ring 6 fits against the inner wall of the sealing ring 5. The annular groove 4 is used to install the sealing ring 5 and the compensating ring 6, preventing them from shifting during installation or use. The compensating ring 6 is a nickel-titanium alloy compensating ring. Nickel-titanium alloy has excellent elasticity and shape memory effect, and can automatically recover its deformation when temperature / pressure changes, continuously applying stable pressure to the sealing ring, effectively compensating for the aging shrinkage or gap increase of the sealing ring, maintaining long-term sealing effect, and avoiding sealing failure. The axial section of the convex ring 2 is triangular. The convex ring 2 with an angular or triangular cross-section has the characteristics of "good guidance and tight fit". It is easy to insert into the matching groove of the socket during installation. After insertion, the hypotenuse of the triangle can form a "barbed" engagement with the inner wall of the groove, which strengthens the axial resistance and prevents the joint from falling out due to fluid pressure or vibration. Multiple convex rings 2 are evenly distributed on the outer wall of the socket joint 1. The even distribution makes the engagement point of the convex ring 2 and the socket groove evenly stressed, avoiding excessive local stress that could cause deformation of the convex ring 2 or damage to the groove. The thickness of the sealing ring 5 is greater than the thickness of the compensation ring 6.

[0037] Example 2:

[0038] Based on the above embodiment 1, in order to improve the performance of coating 7, a coating of the following materials will be used.

[0039] Specifically, the coating 7 is a polytetrafluoroethylene composite coating. The coating 7 isolates external corrosive media (such as acid and alkali fluids, air humidity), thereby extending the overall service life of the joint.

[0040] Example 3:

[0041] Based on the above embodiment 1, in order to make the sealing ring 5 elastic, the sealing ring 5 will be made of the following materials.

[0042] Specifically, the sealing ring 5 is made of EPDM rubber or fluororubber. When the sealing ring 5 is compressed, it undergoes elastic deformation, filling the gap between the joint and the connecting pipe, blocking fluid leakage, and achieving the initial sealing function.

[0043] The working principle of this utility model is as follows: First, the operator can insert the spigot end of the socket joint 1 into the socket end of the connecting pipe. During the process, the triangular cross-section convex ring 2 is embedded into the matching groove on the inner wall of the socket under the guiding action. Because the convex rings 2 are evenly distributed, the biting point is evenly stressed, forming a "barbed" mechanical anti-retraction structure, preventing the joint from axially coming out of the socket, and achieving "self-locking". During the insertion process, the sealing ring 5 in the annular groove 4 is squeezed and deformed by the inner wall of the socket. The deformed sealing ring 5 fills the gap between the socket joint 1 and the socket, blocking the fluid channel and achieving sealing.

[0044] During use, if temperature / pressure changes cause the sealing ring 5 to age and shrink, or the gap between the joint and the socket to increase, the nickel-titanium alloy compensation ring 6 will deform due to its own elasticity or shape memory effect, applying continuous pressure to the inner wall of the sealing ring, pushing the sealing ring 5 to fill the gap again and maintain the sealing effect; while the polytetrafluoroethylene composite coating 7 covers the outer wall of the socket joint 1, the convex ring 2 and the middle ring 3, which can isolate the corrosion of the fluid medium (such as acid and alkali corrosion), thereby improving the service life of the joint.

[0045] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A sealing, anti-reverse, self-locking socket joint, comprising a socket joint (1), characterized in that: The outer wall of the socket joint (1) is provided with a plurality of parallel protruding rings (2), and the outer walls of the socket joint (1) are also provided with annular grooves (4) on both sides. The annular grooves (4) are respectively provided with a compensation ring (6) and a sealing ring (5).

2. The sealing and anti-reverse self-locking socket joint according to claim 1, characterized in that: The outer wall of the socket joint (1) is provided with a middle ring (3), and the outer wall of the socket joint (1), the outer wall of the convex ring (2) and the outer wall of the middle ring (3) are all coated with a coating (7).

3. The sealing, anti-reverse self-locking socket joint according to claim 1, characterized in that: The compensation ring (6) is located deep inside the annular groove (4), and the outer wall of the compensation ring (6) is in contact with the inner wall of the sealing ring (5).

4. A sealing, anti-reverse self-locking socket joint according to claim 1, characterized in that: The compensation ring (6) is a nickel-titanium alloy compensation ring.

5. A sealing, anti-reverse self-locking socket joint according to claim 1, characterized in that: The axial cross section of the convex ring (2) is triangular.

6. A sealing, anti-reverse self-locking socket joint according to claim 2, characterized in that: The coating (7) is a polytetrafluoroethylene composite coating.

7. A sealing, anti-reverse self-locking socket joint according to claim 1, characterized in that: The sealing ring (5) is made of EPDM rubber or fluororubber.

8. A sealing, anti-reverse self-locking socket joint according to claim 1, characterized in that: Multiple convex rings (2) are equidistantly distributed on the outer wall of the socket joint (1).

9. A sealing, anti-reverse self-locking socket joint according to claim 1, characterized in that: The thickness of the sealing ring (5) is greater than the thickness of the compensation ring (6).

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