A socket type anti-disengagement pipe coupling device

Abstract

This invention provides a socket-type anti-detachment pipe connection device, belonging to the field of pipe connection technology. The device includes a first pipe and a second pipe, with the second pipe inserted into the first pipe. The overlapping connection area of ​​the first and second pipes forms a socket connection portion. The outer circumferential surface of the second pipe has a ring-shaped array of locking holes along its axial direction. A fixed shaft is slidably disposed in each locking hole along its radial direction. The fixed shaft has locking positions: retracted into the second pipe and extended out of the inner wall of the first pipe corresponding to the locking portion. A driving assembly is disposed inside the second pipe. By providing multiple radially movable fixed shafts, after the second pipe is inserted into the first pipe, the driving assembly can drive the fixed shafts to extend into the limiting structure of the first pipe, thereby forming a reliable mechanical lock, effectively preventing axial detachment of the pipe and improving connection reliability.

Description

Technical Field

[0001] This invention belongs to the field of pipe connection technology, and specifically relates to a socket-type anti-detachment pipe connection device. Background Technology

[0002] Socket-type pipes are widely used in municipal water supply and drainage, fire protection pipelines, gas transmission and industrial fluid transmission due to their convenient installation and good sealing performance.

[0003] However, existing socket-type pipe connections typically rely on socket fitting and sealing rings to achieve pipe connection and sealing. The sealing rings are mainly used to ensure the sealing performance at the connection, but their ability to limit the axial movement of the pipe is limited. When the pipe is subjected to internal medium pressure fluctuations, external vibrations, or axial tension, the first and second pipes are prone to relative axial displacement, which may lead to pipe separation in severe cases.

[0004] In addition, some pipes may be fitted with anti-detachment structures such as clamps, flanges or locking devices on the outside. However, such structures have many parts and the installation and disassembly process is complicated, making it difficult to balance the requirements of connection reliability and rapid construction. Summary of the Invention

[0005] The purpose of this invention is to provide a socket-type anti-detachment pipe connection device, which aims to solve the problems of easy axial detachment and low installation efficiency in the prior art of socket-type pipe connections.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a socket-type anti-detachment pipe connection device, comprising: a first pipe and a second pipe, wherein the second pipe is inserted into the first pipe, and the overlapping connection area of ​​the first pipe and the second pipe forms a socket connection portion.

[0007] The outer circumferential surface of the second pipe has a ring of locking holes arranged along its axial direction. The locking holes are slidably provided with a fixed shaft along their radial direction. The fixed shaft has a locking position that is retracted into the second pipe and extended out of the inner wall of the first pipe to the corresponding locking part.

[0008] The second pipe is equipped with a drive assembly, which is connected to each fixed shaft. The drive assembly is used to drive each fixed shaft to extend or retract radially.

[0009] The first pipe is provided with a limiting structure for the fixed shaft to extend into and be limited. When the second pipe is inserted into the predetermined position, the drive assembly drives the fixed shaft to extend and cooperate with the limiting structure to restrict the separation of the first pipe and the second pipe along the axis.

[0010] As a socket-type anti-detachment pipe connection device of the present invention, preferably, the driving component includes two V-shaped steel wires, which are arranged crosswise inside the second pipe. The two ends of each V-shaped steel wire are respectively connected to two oppositely arranged fixed shafts so that the two oppositely arranged fixed shafts form a linkage.

[0011] As a socket-type anti-detachment pipe connection device of the present invention, preferably, the two V-shaped steel wires cross to form an X-shaped linkage structure, wherein one V-shaped steel wire connects two fixed shafts located in the same diameter direction, and the other V-shaped steel wire connects two fixed shafts located in another radial direction.

[0012] As a socket-type anti-detachment pipe connection device of the present invention, preferably, the intersection of the two V-shaped steel wires is located at the axis of the second pipe, and the two V-shaped steel wires can slide or elastically contact each other.

[0013] As a socket-type anti-detachment pipe connection device of the present invention, preferably, the driving component includes elastic plates that are respectively connected to each fixed shaft. The elastic plates are used to drive the corresponding fixed shaft to move toward the locking position, and the second pipe is provided with fasteners for fixing the elastic plates.

[0014] As a socket-type anti-detachment pipe connection device of the present invention, preferably, the fastener is a screw set inside the second pipe, and the second pipe has a screw hole adapted to the screw. One end of the elastic sheet is fixed inside the second pipe by the screw, and the other end is connected to the fixed shaft. When the fixed shaft is squeezed by the inner wall of the first pipe, it can compress the elastic sheet and automatically extend at the corresponding limiting structure under the action of the elastic sheet's restoring force.

[0015] As a socket-type anti-detachment pipe connection device of the present invention, preferably, the elastic sheet is a leaf spring.

[0016] As a socket-type anti-detachment pipe connection device of the present invention, preferably, the limiting structure is a positioning ring disposed inside the first pipe. A sealing ring is disposed inside the first pipe. The positioning ring is located between the sealing ring and the fixed shaft and forms a limiting part for the fixed shaft to extend into. After the fixed shaft extends out, it cooperates with the limiting part to restrict the first pipe and the second pipe from detaching from each other along the axial direction. At the same time, the positioning ring is used to isolate the fixed shaft and the sealing ring.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The socket-type anti-detachment pipe connection device, by setting multiple radially movable fixed shafts, after the second pipe is inserted into the first pipe, the driving component can drive the fixed shafts to extend into the limiting structure of the first pipe, thereby forming a reliable mechanical lock, effectively preventing the pipe from axially detaching and improving the connection reliability.

[0019] 2. This socket-type anti-detachment pipe connection device uses a drive component to drive multiple fixed shafts to move synchronously, eliminating the need to install locking pins or fasteners one by one, which helps to improve pipe installation efficiency.

[0020] 3. In the first embodiment of the socket-type anti-detachment pipe connection device, two cross-arranged V-shaped steel wires are used as the linkage mechanism. The two V-shaped steel wires form an X-shaped linkage structure, which can synchronously drive multiple fixed shafts to move, so that each fixed shaft is subjected to uniform force and has good motion consistency.

[0021] 4. In the second embodiment of the socket-type anti-detachment pipe connection device, an elastic plate drives the fixed shaft. After the pipe is inserted into the position, the fixed shaft can automatically extend into the limiting structure under the restoring force of the elastic plate to achieve automatic locking without additional operation, thus further improving the ease of installation.

[0022] 5. This socket-type anti-detachment pipe connection device, by setting a positioning ring inside the first pipe, the positioning ring is located between the sealing ring and the fixed shaft. It serves as both a limiting part for the fixed shaft and an isolation between the fixed shaft and the sealing ring, preventing the sealing ring from being directly squeezed or worn during the movement of the fixed shaft, thereby improving the service life of the sealing ring and the sealing reliability of the entire pipe connection. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the internal cross-sectional structure of the first and second pipes in a specific embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the second pipe in a specific embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the first and second pipes in a specific embodiment two of the present invention;

[0027] Figure 4 This is a front view of the positioning ring in this invention.

[0028] In the diagram: 1. First pipe; 2. Second pipe; 10. Positioning ring; 11. Sealing ring; 21. Locking hole; 22. Fixed shaft; 31. V-shaped steel wire; 32. Elastic sheet; 33. Screw; 34. Screw hole. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figure 1 and Figure 2 The present invention provides the following technical solution: a socket-type anti-detachment pipe connection device, comprising a first pipe 1 and a second pipe 2, wherein the second pipe 2 is inserted into the first pipe 1 to form a socket connection.

[0031] In this embodiment, four locking holes 21 are preferably provided. Four locking holes 21 are evenly provided on the outer circumferential surface of the second pipe 2. A fixed shaft 22 is slidably installed in each locking hole 21. The fixed shaft 22 can move radially along the second pipe 2.

[0032] The second pipe 2 is equipped with a drive assembly 3, which includes two V-shaped steel wires 31. The two V-shaped steel wires 31 are arranged to cross each other to form an X-shaped linkage structure.

[0033] One V-shaped steel wire 31 connects two fixed shafts 22 located in the same diameter direction, and another V-shaped steel wire 31 connects two fixed shafts 22 located in another radial direction, thereby enabling the four fixed shafts 22 to be linked together.

[0034] Working principle: During use, the operator inserts the second pipe 2 into the first pipe 1. During the insertion process, the inner wall of the first pipe 1 abuts against the fixed shaft 22, pushing the fixed shaft 22 to move radially inward, causing the two V-shaped steel wires 31 to undergo elastic deformation. As the second pipe 2 continues to be inserted, when it reaches the predetermined installation position, the fixed shaft 22 corresponds to the limiting structure inside the first pipe 1. At this time, the two V-shaped steel wires 31 return to their original shape under the elastic recovery action, and drive the four fixed shafts 22 to extend radially outward simultaneously, so that the fixed shafts 22 are embedded in the limiting structure, thereby achieving axial locking between the first pipe 1 and the second pipe 2.

[0035] When disassembly is required, the operator uses a hook-like tool to hook the overlapping part of the two V-shaped steel wires 31 and applies outward pulling force, causing the two V-shaped steel wires 31 to undergo reverse elastic deformation, which drives the four fixed shafts 22 to retract radially into the locking hole 21 at the same time, so that the fixed shafts 22 are released from the limiting structure, releasing the locking state between the first pipe 1 and the second pipe 2. At this time, the second pipe 2 can be pulled out from the first pipe 1 to achieve quick disassembly.

[0036] The limiting structure is a positioning ring 10 set inside the first pipe 1. The positioning ring 10 and the sealing ring 11 are set inside the first pipe 1. The positioning ring 10 is located between the sealing ring 11 and the fixed shaft 22. After the fixed shaft 22 extends out, it cooperates with the limiting part formed by the positioning ring 10 to restrict the first pipe 1 and the second pipe 2 from separating relative to each other along the axial direction.

[0037] Meanwhile, the positioning ring 10 isolates the fixed shaft 22 from the sealing ring 11, preventing the fixed shaft 22 from directly contacting the sealing ring 11 during the extension and retraction process, thereby improving the service life of the sealing ring 11.

[0038] like Figure 4 As shown, the positioning ring 10 has an opening, which gives the positioning ring 10 radial elastic deformation capability. During installation, the opening of the positioning ring 10 is placed at the installation end of the first pipe 1, and one end of the positioning ring 10 is placed inside the first pipe 1. Then, a hammering force is applied to the positioning ring 10. Under the action of force, the positioning ring 10 elastically contracts and enters the first pipe 1. When it reaches the predetermined installation position, the positioning ring 10 returns to its original shape and is locked into the inner wall of the first pipe 1, thus achieving rapid installation.

[0039] like Figure 4 As shown, the positioning ring 10 is made of an elastic material, preferably spring steel, and its outer diameter in the free state is larger than the inner diameter of the first pipe 1, preferably greater than 2 mm. During installation, the positioning ring 10 is radially compressed to insert it into the first pipe 1. Under the elastic recovery action, the positioning ring 10 abuts against the inner wall of the first pipe 1 to achieve stable positioning.

[0040] Since the inner diameter of the positioning ring 10 is larger than the outer diameter of the second pipe 2, the second pipe 2 can pass through the positioning ring 10 without interference during the insertion of the first pipe 1. This ensures smooth assembly while reliably limiting the positioning ring 10.

[0041] Example 2: Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the structure of the driving component 3 is different, while the rest of the structure is the same, and will not be described again here.

[0042] The drive assembly 3 includes elastic plates 32 respectively disposed inside each fixed shaft 22. One end of each elastic plate 32 is fixed to the inner wall of the second pipe 2 by a screw 33. The second pipe 2 is provided with a screw hole 34. The other end of the elastic plate 32 is connected to the fixed shaft 22.

[0043] During the process of the second pipe 2 being inserted into the first pipe 1, the fixed shaft 22 is squeezed inward by the inner wall of the first pipe 1 and moves inward. At the same time, it causes the elastic sheet 32 ​​to undergo elastic deformation. When the fixed shaft 22 moves to the corresponding position of the positioning ring 10, under the restoring force of the elastic sheet 32, the fixed shaft 22 automatically extends into the limiting part formed by the positioning ring 10, thereby achieving automatic locking between the first pipe 1 and the second pipe 2.

[0044] This type of pipe structure is typically used for underground pipelines and does not require disassembly. The pipe in Example 1 is detachable, and a suitable pipe structure can be selected according to the actual usage requirements.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bell and spigot anti-unscrewing pipe coupling device comprising: A first pipe and a second pipe, wherein the second pipe is inserted into the first pipe, and the overlapping connection area of ​​the first pipe and the second pipe forms a socket connection, characterized in that... The outer circumferential surface of the second pipe has a ring of locking holes arranged along its axial direction. The locking holes are slidably provided with a fixed shaft along their radial direction. The fixed shaft has a locking position that is retracted into the second pipe and extended out of the inner wall of the first pipe to the corresponding locking part. The second pipe is equipped with a drive assembly, which is connected to each fixed shaft. The drive assembly is used to drive each fixed shaft to extend or retract radially. The first pipe is provided with a limiting structure for the fixed shaft to extend into and be limited. When the second pipe is inserted into the predetermined position, the drive assembly drives the fixed shaft to extend and cooperate with the limiting structure to restrict the separation of the first pipe and the second pipe along the axis.

2. A bell and spigot anti-unscrewing pipe coupling according to claim 1, wherein: The drive assembly includes two V-shaped steel wires, which are arranged crosswise inside the second pipe. The two ends of each V-shaped steel wire are connected to two oppositely arranged fixed shafts, so that the two oppositely arranged fixed shafts can be linked together.

3. A bell and spigot anti-unscrewing pipe coupling according to claim 2, wherein: The two V-shaped steel wires intersect to form an X-shaped linkage structure, wherein one V-shaped steel wire connects two fixed shafts located in the same diameter direction, and the other V-shaped steel wire connects two fixed shafts located in another radial direction.

4. The socket-type anti-detachment pipe connection device according to claim 2, characterized in that: The intersection of the two V-shaped steel wires is located at the axis of the second pipe, and the two V-shaped steel wires can slide or make elastic contact with each other.

5. The socket-type anti-detachment pipe connection device according to claim 1, characterized in that: The drive assembly includes elastic plates that are connected to each fixed shaft respectively. The elastic plates are used to drive the corresponding fixed shaft to move toward the locking position. Fasteners for fixing the elastic plates are provided inside the second pipe.

6. The socket-type anti-detachment pipe connection device according to claim 5, characterized in that: The fastener is a screw installed inside the second pipe. The second pipe has a screw hole that matches the screw. One end of the elastic sheet is fixed inside the second pipe by the screw, and the other end is connected to the fixed shaft. When the fixed shaft is squeezed by the inner wall of the first pipe, it can compress the elastic sheet and automatically extend at the corresponding limiting structure under the action of the elastic sheet's restoring force.

7. A socket-type anti-detachment pipe connection device according to claim 5, characterized in that: The elastic sheet is a leaf spring.

8. A socket-type anti-detachment pipe connection device according to claim 1, characterized in that: The limiting structure is a positioning ring disposed inside the first pipe. A sealing ring is disposed inside the first pipe. The positioning ring is located between the sealing ring and the fixed shaft and forms a limiting part for the fixed shaft to extend into. After the fixed shaft extends out, it cooperates with the limiting part to restrict the first pipe and the second pipe from separating relative to each other along the axial direction. At the same time, the positioning ring is used to isolate the fixed shaft and the sealing ring.

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