HDPE cable protection pipe

Abstract

This utility model discloses an HDPE cable protection pipe, including a double-walled pipe body, a sealing connection mechanism, and an anti-loosening mechanism. The sealing connection mechanism consists of a first connector and a second connector respectively located at the ends of two pipe sections. They achieve rapid interlocking through mechanical insertion of protrusions into mounting holes, and a spring-loaded mating ring and an outer push ring form an end-face seal. The anti-loosening mechanism is fitted at the connection point and consists of upper and lower fixing rings connected by hinges, a locking stud, and a locking switch with a built-in ratchet mechanism. Tightening the locking switch compresses the elastic washer to apply radial preload. This utility model adopts a purely mechanical connection method, solving the problems of traditional socket-type interfaces relying on rubber rings that are prone to aging, have poor pull-out resistance, and are easily loosened. It has the advantages of rapid connection, reliable sealing, strong shear resistance, and the ability to adaptively compensate for preload to prevent loosening, significantly improving the long-term stability of the cable protection system.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection equipment technology, and in particular to an HDPE cable protection pipe. Background Technology

[0002] HDPE cable protection pipes are mainly used in power, communication and other fields. As an underground protective channel for cables, their core function is to protect cables from mechanical damage, chemical corrosion and groundwater intrusion, thereby ensuring the safety and stability of power supply or communication lines.

[0003] Currently, the most mainstream and relevant existing technology in this field is the socket-type rubber ring sealing connection. This technology typically involves prefabricating a socket at one end of the pipe and a spigot at the other, with a groove created within the socket to embed the elastic rubber sealing ring. During installation, the spigot is inserted into the socket, and the rubber ring is deformed by compression to achieve a seal. Its connection and fixation mainly rely on the friction between the pipes and the resilience of the rubber ring.

[0004] However, the aforementioned existing technologies have significant drawbacks: First, their sealing performance relies entirely on the rubber ring, and rubber materials buried underground for extended periods are prone to aging and loss of elasticity, leading to seal failure and groundwater leakage, with a lifespan far shorter than that of the HDPE pipe itself. Second, this connection method has weak pull-out resistance, especially during trenchless dragging construction, where the joint is easily pulled apart. Furthermore, the joint possesses only limited flexibility, making it susceptible to damage under foundation settlement or external shear forces, and lacks an effective anti-loosening mechanism, making it prone to loosening in vibrating environments. Utility Model Content

[0005] This utility model provides an HDPE cable protection pipe that solves the problem of easy loosening in a vibrating environment and improves the resistance to pull-out. This utility model has a simple structure and strong sealing performance.

[0006] The technical solution adopted by this utility model to solve its technical problem is an HDPE cable protection pipe, comprising: Pipe body, sealing connection mechanism and anti-loosening mechanism; The cable protection pipe is composed of a double-walled structure, including an outer wall pipe and an inner wall pipe. The outer wall pipe has a regular threaded structure on its surface, while the inner wall pipe is a smooth inner pipe.

[0007] The sealing connection mechanism includes a first connector and a second connector. The first connector is integrally formed with the end of a tube and includes a first locking ring, an outer push ring, and a mounting hole. The first locking ring is fixedly installed on the end face of the first connector near the tube. The outer push ring is located on the side of the first locking ring away from the tube and has a mounting hole on its circumferential surface. The second connector is integrally formed with the end of another tube and includes a protrusion, an inner push ring, a spring, a mating ring, and a second locking ring. The second locking ring is fixedly installed on the end face of the second connector near the tube. The inner push ring is located on the side of the second locking ring away from the tube and has a protrusion on its circumferential surface. Multiple sets of springs are provided on the circumferential surface of the inner push ring near the outer push ring, and a mating ring is provided on the side of the spring near the outer push ring.

[0008] The anti-loosening mechanism is sleeved on both ends of the already connected sealing connection mechanism. It includes an upper fixing ring, a lower fixing ring, a hinge, a locking stud, a locking switch, and an elastic washer. The upper fixing ring and the lower fixing ring are connected by a hinge, which is a rotatable metal shaft. The locking stud is fixed to one side of the lower fixing ring (the non-hinged side), and the other end passes through a through hole on the upper fixing ring. The locking switch is threadedly engaged with the locking stud. The elastic washer is sleeved between the upper fixing ring and the lower fixing ring.

[0009] This utility model provides an HDPE cable protection pipe that achieves fast and reliable mechanical connection and long-lasting sealing through the synergistic effect of an innovative sealing connection mechanism and an anti-loosening mechanism. It effectively solves the industry pain points of traditional socket-type interfaces, such as easy aging of rubber rings, weak pull-out resistance, and easy loosening. It significantly improves the connection strength, sealing life, and anti-seismic and anti-settlement performance of the cable protection pipe system, and reduces the later maintenance costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of the HDPE cable protection pipe of this utility model; Figure 2 This is a structural schematic diagram of the connection point of the HDPE cable protection pipe of this utility model; Figure 3 This is a schematic diagram of the sealing connection mechanism of the HDPE cable protection pipe of this utility model; Figure 4 This is a schematic diagram of the anti-loosening mechanism of the HDPE cable protection pipe of this utility model.

[0011] Explanation of reference numerals in the attached figures: 1. Tube body; 2. Sealing connection mechanism; 3. Anti-loosening mechanism; 4. Outer wall tube; 5. Inner wall tube; 6. First connector; 7. Second connector; 8. First locking ring; 9. Outer push ring; 10. Mounting hole; 11. Protruding post; 12. Inner push ring; 13. Spring; 14. Matching ring; 15. Second locking ring; 16. Lower fixing ring; 17. Hinge; 18. Locking stud; 19. Locking switch; 20. Elastic washer; 21. Upper fixing ring. Detailed Implementation

[0012] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0013] like Figures 1 to 4 As shown in the figure, an HDPE cable protection pipe provided by this utility model embodiment includes a pipe body 1, a sealing connection mechanism 2, and an anti-loosening mechanism 3; In one specific embodiment, the cable protection pipe body 1 is composed of a double-walled structure, including an outer wall pipe 4 and an inner wall pipe 5. The outer wall pipe 4 has a regular threaded structure on its surface, which is the main pressure-bearing structure. The inner wall pipe 5 is a smooth inner pipe, which is conducive to cable pulling. The two work together to improve the smoothness of cable installation and corrosion resistance. In one specific embodiment, to make the connection of the cable protection pipe tighter and more convenient, the present invention provides a sealing connection mechanism 2, which includes a first connector 6 and a second connector 7, which cooperate with each other. The first connector 6 is integrally formed with the end of one pipe body 1, including a first locking ring 8, an outer push ring 9, and a mounting hole 10. The first locking ring 8 is fixedly installed on the end face of the first connector 6 near the pipe body 1, and the outer push ring 9 is located on the side of the first locking ring 8 away from the pipe body 1, with a mounting hole 10 opened on its circumferential surface. The second connector 7 is integrally formed with the end of another pipe body 1, including a protrusion 11, an inner push ring 12, a spring 13, a mating ring 14, and a second locking ring 15. The second locking ring 15 is fixedly installed on the second connector. 7. Near the end face of the tube body 1, the inner push ring 12 is located on the side of the second locking ring 15 away from the tube body 1. A protrusion 11 is provided on its circumferential surface. The protrusion 11 can move radially on the inner push ring 12 and cooperate with the mounting hole 10. Multiple sets of springs 13 are provided on the circumferential surface of the inner push ring 12 near the outer push ring 9 to provide axial preload. A mating ring 14 is provided on the side of the spring 13 near the outer push ring 9 to achieve radial sealing of the sealing connection mechanism. When the first connector 6 and the second connector 7 are combined, the protrusion 11 on the inner push ring 12 is squeezed and the inner push ring 12 is pushed to slide along the mounting hole 10. After the protrusion 11 contacts the mounting hole 10, it quickly pops out to complete the fixed fit. At this time, the mating ring 14 is squeezed by the spring 13 and embedded into the outer push ring 9 and cooperates with it to achieve a tight seal. In one specific embodiment, to prevent the cable inside the pipe body 1 from loosening, this utility model also provides an anti-loosening mechanism 3. The anti-loosening mechanism 3 is sleeved on both ends of the already connected sealing connection mechanism 2. The main body is a ring assembly, which includes an upper fixing ring 21, a lower fixing ring 16, a hinge 17, a locking stud 18, a locking switch 19, and an elastic washer 20. The upper fixing ring 21 and the lower fixing ring 16 are connected by the hinge 17, which can be opened and closed to form a complete clamping ring. The hinge 17 is a rotatable metal shaft. The locking stud 18 is fixed to one side (the non-hinged side) of the lower fixing ring 16, and the other end passes through the through hole on the upper fixing ring 21. The locking switch 19 is a quick-release wrench with an embedded ratchet structure, connected to the locking stud. The end thread of 18 is engaged, and the elastic washer 20 is sleeved between the upper fixing ring 21 and the lower fixing ring 16, forming a tight fit with the locking ring. After the sealing connection mechanism 2 is connected, the anti-loosening mechanism 3, which is in the open state, is sleeved on its outside, the upper fixing ring 21 and the lower fixing ring 16 are closed, and the locking switch 19 is continuously rotated. Through its internal ratchet structure, it rotates in one direction and tightens the locking stud 18, so that the upper fixing ring 21 and the lower fixing ring 16 firmly clamp the internal connector. The elastic washer 20 is compressed, generating a continuous elastic pre-tightening force. When the foundation settles or the pipe expands and contracts due to thermal expansion and contraction, the elastic energy of the elastic washer 20 will be released, automatically pushing the ratchet mechanism to compensate for the pre-tightening force, and always keeping the interface in a pressed state. The working process of this utility model is divided into three stages: initial assembly, docking and operation, and disassembly and maintenance. Initial assembly stage: The operator first checks the ends of the two HDPE cable protection pipes to be connected, ensuring that the threads and sealing surfaces of the first connector 6 and the second connector 7 are free of mud, water or other impurities. Then, the upper fixing ring 21 and the lower fixing ring 16 of the anti-loosening mechanism 3 are opened, pre-fitted onto the pipe body 1, and pushed to a position that does not affect the connection operation. During the docking operation phase: Align the tube body 1 with the first connector 6 and the tube body 1 with the second connector 7 along their axes, then insert the end of the first connector 6 into the inlet of the second connector 7, apply axial thrust, and make the two connectors continue to move relative to each other. At this time, the outer push ring 9 on the first connector 6 begins to contact and compress with the inner push ring 12 on the second connector 7. The compressive force overcomes the preload of the spring 13, pushing the inner push ring 12 to retract and move inward into the second connector 7. As the inner push ring 12 moves, the radially movable protrusion 11 on its circumferential surface moves radially accordingly. When the protrusion 11 moves to the position aligned with the mounting hole 10 on the first connector 6, the protrusion 11 quickly pops out radially under the action of the internal mechanism and precisely engages in the mounting hole 10. At the same time as the mechanical interlock occurs, the mating ring 14 on the inner push ring 12 is tightly pressed into the corresponding groove or sealing surface inside the outer push ring 9 under the action of the continuously restoring spring 13. The tight combination of the mating ring 14 and the outer push ring 9 forms a solid end face seal, effectively preventing the intrusion of groundwater and sediment; the upper fixing ring 21 is closed. The upper and lower fixing rings 21 and 16 are tightened together to form a complete clamping ring that wraps around the connection. The locking switch 19 is continuously rotated and moves along the locking stud 18, thereby continuously tightening the upper fixing ring 21 and the lower fixing ring 16 until they are fully locked. Disassembly and maintenance stage: When disassembling, simply loosen the anti-loosening mechanism 3 first, and then squeeze the protrusion 11 to separate the protrusion 11 from the mounting hole 10 to achieve the disassembly function; The above-disclosed embodiments are merely specific examples of this utility model. However, the embodiments of this utility model are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. An HDPE cable protection pipe comprising a pipe body (1), characterized in that, It also includes a sealing connection mechanism (2) and an anti-loosening mechanism (3); the sealing connection mechanism (2) includes a first connector (6) and a second connector (7) that cooperate with each other. The first connector (6) is connected to the end of a tube (1) and has a mounting hole (10) thereon. The second connector (7) is connected to the end of another tube (1) and has a radially movable protrusion (11) thereon. The protrusion (11) is adapted to engage with the mounting hole (10) when the first connector (6) and the second connector (7) are mated to achieve mechanical interlocking. The second connector (7) is also provided with a... A spring (13) for axial preload and a mating ring (14) that cooperates with the first connector (6); the anti-loosening mechanism (3) is sleeved on the outside of the sealed connection mechanism (2) after connection, and includes an upper fixing ring (21), a lower fixing ring (16), a hinge (17), a locking stud (18) and a locking switch (19). The upper fixing ring (21) and the lower fixing ring (16) are connected by the hinge (17) to form an openable clamping ring. The locking stud (18) and the locking switch (19) are threaded together to tighten the clamping ring to apply radial preload to the internal sealed connection mechanism (2).

2. A HDPE cable protection pipe according to claim 1, characterized in that: The first connector (6) further includes a first locking ring (8) and an outer push ring (9). The first locking ring (8) is fixedly installed on the end of the first connector (6), and the mounting hole (10) is opened on the outer push ring (9).

3. A HDPE cable protection pipe according to claim 2, characterized in that: The second connector (7) further includes an inner push ring (12), a mating ring (14), and a second locking ring (15). The protrusion (11) is disposed on the inner push ring (12), the spring (13) acts on the inner push ring (12), and the mating ring (14) is disposed at the end of the spring (13) for forming a seal with the end face of the first connector (6).

4. A HDPE cable protection pipe according to claim 3, characterized in that: The second locking ring (15) is threadedly connected to the second connector (7), and rotating the second locking ring (15) can axially compress the inner push ring (12).

5. A HDPE cable protection pipe according to claim 1, characterized in that: The locking switch (19) is a quick-release wrench with a built-in ratchet structure, which enables one-way rotation locking.

6. A HDPE cable protection pipe according to claim 1, characterized in that: The anti-loosening mechanism (3) also includes an elastic washer (20), which is located between the upper fixing ring (21) and the lower fixing ring (16).

7. A HDPE cable protection pipe according to claim 1, characterized in that: The tube body (1) has a double-wall structure, including an outer wall tube (4) with regular concave and convex spirals and a smooth inner wall tube (5).

8. A HDPE cable protection pipe according to claim 1, characterized in that: The first connector (6) and the end of the tube body (1) are integrally formed.

9. A HDPE cable protection pipe according to claim 1, characterized in that: The second connector (7) and the end of the tube body (1) are integrally formed.

10. A HDPE cable protection pipe according to claim 1, characterized in that: The locking stud (18) is fixed to the side of the lower fixing ring (16) away from the hinge (17), and the other end passes through the through hole on the upper fixing ring (21).

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