A cable protection pipe socket type anti-drop self-locking joint structure

Abstract

The application relates to the field of power and communication infrastructure cable protection pipe connection, and discloses a cable protection pipe socket joint type anti-dropping self-locking joint structure, which comprises a cable protection pipe, one end of the cable protection pipe is provided with a socket end, the other end of the cable protection pipe is provided with a spigot end, two wedge-shaped annular locking grooves are formed on the outer diameter of the socket outer wall in the radial direction, the spigot end comprises a spigot barrel, a plug-in cavity is formed in the middle of the spigot barrel, an anti-dropping locking mechanism is further arranged on the outer diameter of the spigot barrel, the anti-dropping locking mechanism comprises two annular fixing plates, and the annular fixing plates are fixedly installed on the outer diameter of the spigot barrel. The application can realize coaxial convenient assembly of the cable protection pipe, forms irreversible anti-dropping self-locking and dynamic sealing, effectively prevents water and sand from penetrating, is convenient to disassemble and maintain, can be repeatedly used, has stable structure, long service life and is suitable for various working conditions.

Description

Technical Field

[0001] This invention relates to the field of cable protection pipe connection for power and communication infrastructure, specifically a socket-type anti-detachment self-locking joint structure for cable protection pipes. Background Technology

[0002] In the construction of infrastructure such as power and communications, cable protection pipes are core components ensuring the safe operation of cables. They are mainly used to protect cables from damage caused by external impacts, corrosion, and mud and sand intrusion. The reliability of their joint connections directly determines the operational stability of the entire cable line. Currently, most cable protection pipe joints on the market adopt the traditional socket structure, which connects two protection pipes through a simple plug-in fit. They are widely used in various scenarios such as underground laying and outdoor wiring, and are an indispensable connecting component in cable laying projects.

[0003] However, existing socket-type cable protection pipe joints have many technical defects and are difficult to meet the needs of actual engineering applications. On the one hand, traditional joints lack effective anti-loosening self-locking mechanisms, relying solely on the friction of the insertion for fixation. When subjected to external forces such as axial tension, soil settlement, and thermal expansion and contraction of the pipe body, problems such as joint slippage, disengagement, and detachment are prone to occur, leading to cable exposure and damage, causing line faults, and even safety hazards. On the other hand, the sealing structure of existing joints is simple in design, mostly using a single planar sealing ring, which has poor sealing performance and cannot adapt to the deformation requirements of the pipe body's thermal expansion and contraction. This can easily lead to sealing failure, allowing water, mud, and other impurities to seep into the joint, corroding the cable and shortening its service life.

[0004] Furthermore, existing connectors lack precise guiding structures during assembly, easily leading to misalignment and other issues. Forced assembly can damage the connector structure. Additionally, most connectors are inconvenient to disassemble, requiring damage to components for maintenance, making them unusable and increasing construction costs and maintenance difficulty. Therefore, addressing the problems of poor anti-derailment performance, unreliable sealing, and inconvenient assembly and maintenance of existing cable protection pipe connectors, developing a socket-type connector structure that achieves precise guidance, anti-derailment self-locking, dynamic sealing, and convenient assembly and disassembly has become a pressing technical need in the industry. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a socket-type anti-disengagement self-locking connector structure for cable protection pipes, which solves the practical engineering problems of traditional connectors, such as easy disengagement and detachment, easy seal failure, poor adaptability to thermal expansion and contraction, easy misalignment during insertion, inconvenient disassembly and maintenance, and inability to be reused.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a socket-type anti-detachment self-locking connector structure for cable protection pipes, comprising a cable protection pipe, one end of which is provided with a plug end, and the other end of which is provided with a socket end. The plug end includes a plug outer wall, which is fixedly installed at one end of the cable protection pipe. Two wedge-shaped annular locking grooves are formed radially on the outer diameter of the plug outer wall. The socket end includes a socket cylinder, which is fixedly installed at the other end of the cable protection pipe. At one end, the socket cylinder has an insertion cavity in the middle. The outer diameter of the socket cylinder is also provided with an anti-disengagement locking mechanism. The anti-disengagement locking mechanism includes two annular fixing plates, which are fixedly installed on the outer diameter of the socket cylinder. The inner ring of the annular fixing plates has several movable grooves in the radial direction. Movable blocks are movably installed inside the movable grooves. Pressure blocks are movably installed inside the movable blocks. The inner end of the pressure blocks extends to the outside of the movable blocks through a connecting rod and is fixedly installed with wedge-shaped locking teeth.

[0007] Preferably, the outer diameter of the socket outer wall is uniformly fixedly installed with several limiting protrusions along the axial direction, and the end of the socket cylinder is fixedly installed with an annular coaxial guide sleeve, the inner ring of the annular coaxial guide sleeve being uniformly provided with several guide grooves along the axial direction.

[0008] Preferably, a first stepped sealing ring is fixedly installed at the end of the outer wall of the socket, a limiting boss is fixedly installed at the end of the inner side of the insertion cavity near the cable protection pipe, and a second stepped sealing ring is fixedly installed at the outer end of the limiting boss.

[0009] Preferably, the outer diameter of the second stepped sealing ring is fixedly installed by an annular limiting flange, and the inner ring of the second stepped sealing ring is provided with an annular spring tube, one end of which is fixedly installed on one side of the limiting boss.

[0010] Preferably, the surface of the socket cylinder is provided with two rows of perforated grooves evenly distributed in the radial direction.

[0011] Preferably, an arc-shaped slider is fixedly installed on the inner end of each movable block, and an adjusting ring is movably installed between the two annular fixed plates. A spiral groove is provided on both sides of the adjusting ring, and the inner end of each arc-shaped slider is movably disposed inside the spiral groove on the corresponding side.

[0012] Preferably, the outer ends of the pressure blocks are all connected to the inner wall of the corresponding movable blocks by a return spring.

[0013] Preferably, a plurality of anti-slip patterns are uniformly fixed on the outer diameter of the adjusting ring.

[0014] This invention provides a socket-type anti-detachment self-locking connector structure for cable protection pipes. It has the following beneficial effects:

[0015] 1. This invention utilizes a wedge-shaped annular locking groove at the socket end and a wedge-shaped locking tooth at the receiving end to form an axially irreversible locking structure. After insertion, the wedge-shaped locking tooth automatically engages with the wedge-shaped annular locking groove under the action of a return spring, achieving precise self-locking. When the connector is subjected to reverse tension, the two sets of wedge-shaped structures engage at multiple points, forming a self-tightening physical lock that tightens with increasing tension, effectively dispersing axial tension and preventing the locking structure from breaking due to single-point stress concentration. This completely solves the common problems of slippage and disengagement in traditional connectors, significantly improving the reliability of cable protection pipe connections and preventing safety hazards such as cable damage and line faults caused by connector detachment. Simultaneously, the anti-detachment locking mechanism adopts a design with a double-ring fixed plate, movable block, and pressure block, further enhancing the load-bearing capacity and stability of the locking structure, adapting to the tensile force requirements under different working conditions.

[0016] 2. This invention employs a sealing structure where a first-stage sealing ring and a second-stage sealing ring interlock. After insertion, the two rings are evenly compressed, filling the gaps in the pipe wall to form a complete annular sealing band. This effectively prevents water, mud, and other impurities from seeping into the joint, avoiding cable corrosion and wear, and ensuring the cable's service life and operational safety. Simultaneously, the second-stage sealing ring is equipped with an annular spring tube that deforms synchronously with the pipe's thermal expansion and contraction: when the pipe expands, the annular spring tube expands outward to further compress the sealing ring, increasing sealing pressure; when the pipe contracts, the annular spring tube retracts inward to pull the sealing ring, ensuring that the sealing ring always fits tightly against the outer wall of the socket, achieving dynamic sealing. This solves the sealing failure problem caused by thermal expansion and contraction in traditional sealing structures, adapting to the needs of different temperature environments and improving the joint's protective versatility. Furthermore, the annular limiting stop effectively fixes the position of the second-stage sealing ring, preventing it from shifting during assembly or use, further ensuring sealing stability.

[0017] 3. The limiting protrusion at the spigot end of this invention engages with the guide groove of the annular coaxial guide sleeve at the socket end, forcing coaxial alignment between the spigot and socket ends during assembly. This prevents misalignment and other issues, avoiding damage to the joint structure, sealing components, and locking components caused by forced assembly, thus reducing assembly difficulty and losses. Furthermore, applying a special lubricant to the outer wall of the spigot allows for smooth insertion without complex tools, enabling single-person assembly and significantly improving efficiency, making it suitable for batch construction scenarios. In addition, the two rows of perforated grooves on the surface of the socket cylinder facilitate observation of the assembly alignment, further improving assembly accuracy and reducing errors. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a schematic diagram of the connector end in this invention;

[0020] Figure 3 This is a schematic diagram of the structure of the socket end in this invention;

[0021] Figure 4 This is a schematic diagram of the limiting boss in this invention;

[0022] Figure 5 This is a schematic diagram of the anti-disengagement locking mechanism in this invention;

[0023] Figure 6 This is a schematic diagram of the adjusting ring in this invention;

[0024] Figure 7 This is a schematic diagram of the internal structure of the active block in this invention.

[0025] Among them, 1. Cable protection pipe; 2. Socket end; 201. Socket outer wall; 202. First stepped sealing ring; 203. Limiting protrusion; 204. Wedge-shaped annular locking groove; 3. Socket end; 301. Socket cylinder; 302. Insertion cavity; 303. Annular coaxial guide sleeve; 304. Guide groove; 305. Limiting boss; 306. Second stepped sealing ring; 307. Annular limiting stop; 308. Annular spring tube; 309. Perforated groove; 4. Anti-disengagement locking mechanism; 401. Annular fixing plate; 402. Movable groove; 403. Movable block; 404. Arc-shaped slider; 405. Adjusting ring; 406. Vortex-shaped spiral groove; 407. Pressure block; 408. Return spring; 409. Wedge-shaped locking tooth; 410. Anti-slip texture. Detailed Implementation

[0026] The technical solutions in 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.

[0027] Example:

[0028] Please see the appendix Figure 1 - Appendix Figure 7 This invention provides a socket-type anti-detachment self-locking connector structure for cable protection pipes, such as... Figure 1As shown, the cable protection pipe includes a cable protection pipe 1, one end of which is provided with a spigot end 2, and the other end of which is provided with a socket end 3. The spigot end 2 includes a spigot outer wall 201, which is fixedly installed at one end of the cable protection pipe 1. The outer diameter of the spigot outer wall 201 has two wedge-shaped annular locking grooves 204 in the radial direction. The socket end 3 includes a socket cylinder 301, which is fixedly installed at the other end of the cable protection pipe 1. The socket cylinder 301 has a insertion cavity 302 in the middle. An anti-disengagement locking mechanism 4 is also provided on the outer diameter. The anti-disengagement locking mechanism 4 includes two annular fixing plates 401. The annular fixing plates 401 are fixedly installed on the outer diameter of the socket cylinder 301. The inner ring of the annular fixing plates 401 is provided with several movable grooves 402 in the radial direction. Movable blocks 403 are movably installed inside the movable grooves 402. Pressure blocks 407 are movably installed inside the movable blocks 403. The inner end of the pressure blocks 407 extends to the outside of the movable blocks 403 through a connecting rod and is fixedly installed with wedge-shaped locking teeth 409. In this structure, the cable protection pipe 1 serves as the basic carrier of the entire joint structure, used for the passage and protection of the cable. The plug end 2 and the socket end 3 are respectively located at both ends of the cable protection pipe 1, enabling the docking assembly of the two cable protection pipes 1. The outer wall 201 of the plug end 2, as the core load-bearing component, is fixedly installed at the end of the cable protection pipe 1, providing stable support for the docking process. Two wedge-shaped annular locking grooves 204 are formed on the outer diameter of the outer wall 201 of the plug end 204, used to cooperate with the wedge-shaped locking teeth 409 in the anti-disengagement locking mechanism 4 to form a locking structure. The socket cylinder 301 is fixed to the other end of the cable protection pipe 1, and its internal insertion cavity 302 is used to accommodate the outer wall 201 of the plug end 2. 01. To provide space for the docking of the two, the anti-detachment locking mechanism 4 is installed on the outer diameter of the socket cylinder 301 to achieve anti-detachment self-locking between the spigot end 2 and the socket end 3. The two annular fixing plates 401 play a fixing and limiting role, providing an installation base for the movable block 403. The movable groove 402 is used to accommodate the movable block 403 and allow the movable block 403 to move freely in the radial direction. The pressure block 407 installed inside the movable block 403 can drive the wedge-shaped locking teeth 409 to move synchronously. The wedge-shaped locking teeth 409 are fixedly connected to the pressure block 407 through the connecting rod. Its wedge-shaped structure can accurately engage with the wedge-shaped annular locking groove 204 on the outer wall 201 of the spigot to achieve axial locking and prevent the joint from falling off.

[0029] In this embodiment, a plurality of limiting protrusions 203 are uniformly fixedly installed on the outer diameter of the outer wall 201 of the socket along the axial direction. An annular coaxial guide sleeve 303 is fixedly installed on the end of the socket cylinder 301. A plurality of guide grooves 304 are uniformly opened on the inner ring of the annular coaxial guide sleeve 303 along the axial direction. The limiting protrusions 203 are uniformly fixed on the outer diameter of the outer wall 201 of the socket, and their extension direction is consistent with the axial direction of the cable protection pipe 1. The annular coaxial guide sleeve 303 is fixed on the end of the socket cylinder 301 and is coaxially arranged with the socket cylinder 301. The guide grooves 304 are opened on the inner ring of the annular coaxial guide sleeve 303, and the number and size of the guide grooves 304 match the limiting protrusions 203. During the assembly process, the limiting protrusions 203 can be accurately embedded into the guide grooves 304, forcibly realizing the connection between the socket end 2 and the socket. The coaxial connection of end 3 effectively eliminates problems such as misalignment and misalignment during insertion, and avoids damage to the outer wall 201 of the socket, the cylinder 301 of the socket, and subsequent sealing and locking components due to forced assembly. At the same time, it can ensure the smoothness of the connection process, reduce the assembly difficulty, and ensure that the socket end 2 can be accurately inserted into the insertion cavity 302 of the socket end 3, laying a good foundation for subsequent locking and sealing. The limiting protrusion 203 can also enhance the structural strength of the outer wall 201 of the socket and prevent it from deforming during connection and use.

[0030] Furthermore, a first stepped sealing ring 202 is fixedly installed at the end of the outer wall 201 of the socket. A limiting boss 305 is fixedly installed at the end of the inner side of the insertion cavity 302 near the cable protection pipe 1, and a second stepped sealing ring 306 is fixedly installed at the outer end of the limiting boss 305. The first stepped sealing ring 202 is fixed at the end of the outer wall 201 of the socket, and its stepped structure can achieve precise engagement with the second stepped sealing ring 306. The limiting boss 305 is fixed at the inner side of the insertion cavity 302, near the end of the cable protection pipe 1, to limit the insertion depth of the socket end 2. When the end of the outer wall 201 of the socket abuts against the limiting boss 305, it indicates that the socket end 2 is inserted in place, avoiding excessive or shallow insertion that may affect the locking and sealing effect. The second stepped sealing ring 306 is fixed at the outer end of the limiting boss 305 and engages with the first stepped sealing ring 306. Corresponding to the first-step sealing ring 202, when the plug end 2 is inserted into place, the first-step sealing ring 202 and the second-step sealing ring 306 are evenly squeezed against each other, filling the gap between the outer wall 201 of the plug and the plug cavity 302, forming a complete annular sealing band. This effectively blocks water, mud and other impurities from seeping into the joint, preventing the cable from being corroded and worn, and ensuring the service life and operational safety of the cable. The stepped structure design can increase the contact area of ​​the sealing ring and improve the sealing performance. Compared with the traditional flat sealing ring, its sealing reliability is higher.

[0031] Furthermore, the outer diameter of the second-step sealing ring 306 is fixedly installed via an annular limiting flange 307. The inner ring of the second-step sealing ring 306 is provided with an annular spring tube 308, one end of which is fixedly installed on one side of the limiting boss 305. The annular limiting flange 307 is fixed to the inner wall of the insertion cavity 302 of the socket cylinder 301 to fix the outer diameter position of the second-step sealing ring 306, preventing displacement during assembly and ensuring precise alignment with the first-step sealing ring 202. During use, it also prevents the second-step sealing ring 306 from falling off due to thermal expansion and contraction of the tube or external forces, ensuring the stability of the sealing structure. The annular spring tube 308 is located within the inner ring of the second-step sealing ring 306, with one end fixed to the limiting boss 305, and possesses good elasticity and extensibility. It can deform synchronously with the thermal expansion and contraction of the cable protection pipe 1. When the pipe body expands due to heat, the annular spring tube 308 tends to expand outward and squeeze the second stepped sealing ring 306 outward again, making the second stepped sealing ring 306 and the first stepped sealing ring 202 more tightly engaged. When the pipe body contracts due to cold, the annular spring tube 308 tends to contract inward and pull the second stepped sealing ring 306 inward, ensuring that the two sealing rings always maintain a stable interlocking and sealing state. This solves the problem of sealing failure caused by thermal expansion and contraction in traditional sealing structures and improves the sealing reliability and environmental adaptability of the joint.

[0032] Furthermore, two rows of perforated grooves 309 are evenly formed on the surface of the socket cylinder 301 in the radial direction. These perforated grooves 309 are evenly formed on the surface of the socket cylinder 301, distributed in two rows in the radial direction. Their main function is to facilitate observation of the insertion of the spigot end 2. During assembly, workers can observe through the perforated grooves 309 whether the outer wall 201 of the spigot is in contact with the limiting boss 305, thus determining whether the spigot end 2 is inserted correctly. This avoids problems such as insecure locking and poor sealing due to incomplete insertion. Simultaneously, the perforated grooves 309 also serve a ventilation and heat dissipation function, reducing stress caused by excessive temperature inside the joint and protecting the performance of each component. In addition, the design of the perforated grooves 309 reduces the weight of the socket cylinder 301, lowering material costs, without affecting the structural strength of the socket cylinder 301, ensuring it can withstand the forces during the docking process and external forces during use.

[0033] Furthermore, an arc-shaped slider 404 is fixedly installed on the inner end of the movable block 403, and an adjusting ring 405 is movably installed between the two annular fixed plates 401. A spiral groove 406 is opened on both sides of the adjusting ring 405, and the inner end of the arc-shaped slider 404 is movably disposed inside the corresponding spiral groove 406. The arc-shaped slider 404 is fixed to the inner end of the movable block 403. Its shape matches the spiral groove 406, allowing it to slide smoothly inside the spiral groove 406. The adjusting ring 405 is movably installed between two annular fixed plates 401 and can rotate freely around the axis of the socket cylinder 301. The spiral groove 406 is symmetrically distributed on both sides of the adjusting ring 405. The inner end of the arc-shaped slider 404 is embedded in the corresponding spiral groove 406. When the adjusting ring 405 is rotated, the spiral groove 406 will rotate accordingly. Due to the limiting effect of the movable groove 402, the arc-shaped slider 404 cannot rotate with the adjusting ring 405 and can only move along the trajectory of the spiral groove 406, thereby driving the movable block 403 to move outward or inward in the radial direction, realizing the extension and retraction of the wedge-shaped locking tooth 409. This structure is ingeniously designed and can achieve locking and unlocking through simple rotation operation. It is convenient to operate and the transmission is stable, avoiding jamming and ensuring smooth disassembly and maintenance.

[0034] Furthermore, the outer ends of the pressure block 407 are all connected to the inner walls of the corresponding movable block 403 via return springs 408. One end of the return spring 408 is connected to the outer end of the pressure block 407, and the other end is fixed to the inner wall of the movable block 403. In its natural state, the return spring 408 will exert an inward pushing force on the pressure block 407, pushing the pressure block 407 to extend the wedge-shaped locking tooth 409 inward. When the insertion end 2 is inserted into the insertion cavity 302 of the socket end 3, the outer wall 201 of the insertion end will push up the wedge-shaped locking tooth 409, causing the wedge-shaped locking tooth 409 to move the pressure block 407 into the movable block 403. At this time, the return spring 408 is compressed and stores elastic potential energy. When the insertion end 2 is inserted into place, that is, when the end of the outer wall 201 of the insertion end abuts against the limiting boss 305, the wedge-shaped locking tooth 409... The wedge-shaped annular locking groove 204 on the outer wall 201 of the socket is aligned with the wedge-shaped annular locking groove 204. At this time, the return spring 408 releases its elastic potential energy, pushing the pressure block 407 and the wedge-shaped locking tooth 409 to reset, so that the wedge-shaped locking tooth 409 is precisely engaged in the wedge-shaped annular locking groove 204, forming an axial irreversible lock. The setting of the return spring 408 ensures that the wedge-shaped locking tooth 409 can automatically reset and tightly fit the wedge-shaped annular locking groove 204, improving the reliability of locking. At the same time, when the connector is subjected to reverse tension, the return spring 408 can further press the pressure block 407, making the engagement between the wedge-shaped locking tooth 409 and the wedge-shaped annular locking groove 204 more tight, forming a self-tightening effect that gets tighter the more it is pulled.

[0035] Furthermore, several anti-slip patterns 410 are evenly fixed on the outer diameter of the adjusting ring 405. These anti-slip patterns 410 are evenly distributed on the outer diameter of the adjusting ring 405, and their main function is to increase the friction when the operator rotates the adjusting ring 405, preventing slippage and facilitating easy rotation of the adjusting ring 405 for unlocking and disassembling the connector. Especially when hands are oily, dirty, or wearing gloves, the anti-slip patterns 410 effectively improve the convenience and safety of operation. At the same time, the design of the anti-slip patterns 410 also enhances the visual identification of the adjusting ring 405, making it easier for operators to quickly locate the adjustment part and improving maintenance efficiency. The structural design of the anti-slip patterns 410 does not affect the rotational performance of the adjusting ring 405, nor does it reduce the structural strength of the adjusting ring 405, ensuring its long-term stable use.

[0036] Working principle:

[0037] First, check that the spigot end 2 and socket end 3 of the cable protection pipe 1 are free of cracks, burrs, and deformation. Thoroughly clean the inner and outer walls of oil and mud. Apply special lubricating oil to the outer wall 201 of the spigot end 2. Then, align the spigot end 2 of the other cable protection pipe 1 with the socket end 3 and push it in slowly and evenly. The limiting protrusion 203 on the outer wall 201 of the spigot end matches the guide groove 304 on the annular coaxial guide sleeve 303 at the end of the socket cylinder 301, forcing the two to be coaxially connected. This prevents misalignment and insertion, avoids structural damage caused by forced assembly, and simultaneously protects the integrity of the sealing and self-locking components. During insertion, the outer wall 201 of the spigot end will push up the... A wedge-shaped locking tooth 409 is inserted into the movable block 403 until the end of the outer wall 201 of the insertion port abuts against the limiting boss 305 inside the insertion cavity 302, indicating that the insertion is in place. At this time, under the action of the return spring 408, all the pressure blocks 407 and the wedge-shaped locking teeth 409 are pushed to return to their original positions, so that all the wedge-shaped locking teeth 409 are engaged in the wedge-shaped annular locking groove 204, forming an axial irreversible lock. When pulled in the opposite direction, the two sets of wedge-shaped locking teeth 409 and the wedge-shaped annular locking groove 204 engage at multiple points, forming a self-tightening physical lock that tightens as it is pulled, dispersing the axial tension, avoiding single-point stress fracture, and completely solving the problems of slippage and disengagement. After insertion is in place... The first-step sealing ring 202 and the second-step sealing ring 306 are evenly pressed together to form a stepped interlocking seal, filling the gaps in the pipe wall and forming an annular sealing band to block the infiltration path of water and sediment. During subsequent use, when the temperature inside the cable protection pipe 1 changes, the pipe body will expand and contract. When the pipe body expands, the first-step sealing ring 202 and the second-step sealing ring 306 change accordingly. The annular spring tube 308 also expands outwards due to heat and further presses against the second-step sealing ring 306, thus ensuring a stable interlocking seal between the two sealing rings. Similarly, when the pipe body contracts, the annular spring tube 308... Similarly, the heat causes an inward shrinkage tendency, pulling the second stepped sealing ring 306 inward, ensuring that the two sealing rings always maintain a stable meshing seal. When disassembly and maintenance are required, the adjusting ring 405 is rotated. When the adjusting ring 405 rotates, it will drive the vortex-shaped spiral grooves 406 on both sides to rotate. At this time, all the arc-shaped sliders 404 will move in the groove. Due to the limiting effect of the movable groove 402, all the movable blocks 403 will move outward in the radial direction, driving all the pressure blocks 407 and the wedge-shaped locking teeth 409 to move synchronously, thereby causing all the wedge-shaped locking teeth 409 to disengage from the wedge-shaped annular locking groove 204. Then, the insertion end 2 is pulled out evenly to complete the disassembly.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A socket-type anti-detachment self-locking joint structure for cable protection pipes, comprising a cable protection pipe (1), characterized in that, One end of the cable protection pipe (1) is provided with a socket end (2), and the other end of the cable protection pipe (1) is provided with a socket end (3). The socket end (2) includes a socket outer wall (201), which is fixedly installed at one end of the cable protection pipe (1). The outer diameter of the socket outer wall (201) is provided with two wedge-shaped annular locking grooves (204) in the radial direction. The socket end (3) includes a socket cylinder (301), which is fixedly installed at the other end of the cable protection pipe (1). A insertion cavity (302) is provided in the middle of the socket cylinder (301). An anti-disengagement locking mechanism (4) is also provided on the outer diameter of the socket cylinder (301). The anti-disengagement locking mechanism (4) includes two annular fixing plates (401). The annular fixing plates (401) are fixedly installed on the outer diameter of the socket cylinder (301). The inner ring of the annular fixing plate (401) is provided with several movable grooves (402) in the radial direction. Movable blocks (403) are movably installed inside the movable grooves (402). Pressure blocks (407) are movably installed inside the movable blocks (403). The inner end of the pressure blocks (407) extends to the outside of the movable blocks (403) through a connecting rod and is fixedly installed with wedge-shaped locking teeth (409).

2. The cable protection pipe socket-type anti-detachment self-locking joint structure according to claim 1, characterized in that, The outer diameter of the outer wall of the socket (201) is uniformly fixed with several limiting protrusions (203) along the axial direction. The end of the socket cylinder (301) is fixedly installed with an annular coaxial guide sleeve (303). The inner ring of the annular coaxial guide sleeve (303) is uniformly provided with several guide grooves (304) along the axial direction.

3. The cable protection pipe socket-type anti-detachment self-locking joint structure according to claim 1, characterized in that, A first stepped sealing ring (202) is fixedly installed at the end of the outer wall (201) of the socket, and a limiting boss (305) is fixedly installed at the end of the inner side of the insertion cavity (302) near the cable protection pipe (1), and a second stepped sealing ring (306) is fixedly installed at the outer end of the limiting boss (305).

4. The cable protection pipe socket-type anti-detachment self-locking joint structure according to claim 3, characterized in that, The outer diameter of the second stepped sealing ring (306) is fixedly installed by the annular limiting flange (307). The inner ring of the second stepped sealing ring (306) is provided with an annular spring tube (308), and one end of the annular spring tube (308) is fixedly installed on one side of the limiting boss (305).

5. The cable protection pipe socket-type anti-detachment self-locking joint structure according to claim 1, characterized in that, The surface of the socket cylinder (301) is uniformly provided with two rows of perforated grooves (309) in the radial direction.

6. The cable protection pipe socket-type anti-detachment self-locking joint structure according to claim 1, characterized in that, The inner ends of the movable block (403) are all fixedly installed with arc-shaped sliders (404), and an adjusting ring (405) is movably installed between the two annular fixed plates (401). The adjusting ring (405) has a vortex-shaped spiral groove (406) on both sides, and the inner ends of the arc-shaped sliders (404) are movably arranged inside the corresponding vortex-shaped spiral groove (406).

7. The cable protection pipe socket-type anti-detachment self-locking joint structure according to claim 1, characterized in that, The outer ends of the pressure blocks (407) are all connected to the inner walls of the corresponding movable blocks (403) via return springs (408).

8. The cable protection pipe socket-type anti-detachment self-locking joint structure according to claim 6, characterized in that, Several anti-slip patterns (410) are uniformly fixed on the outer diameter of the adjusting ring (405).

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