MPP cable protection pipe structure

Abstract

The invention discloses an MPP cable protection tube structure, which comprises a protection tube body, a first connecting member is arranged at the front end of the protection tube body, a second connecting member is arranged at the rear end of the protection tube body, and the protection tube body comprises an inner wall smooth layer, a middle corrugated compression-resistant layer and an outer wall wear-resistant layer which are sequentially compounded from inside to outside, the corrugated section of the middle corrugated compression-resistant layer is trapezoidal, and the outer portion of the outer wall wear-resistant layer is coated with a polyurethane coating. The invention belongs to the technical field of cable protection pipes, and effectively solves the problems that an MPP cable protection pipe structure is insufficient in mechanical strength and compression resistance and lacks optimization of a connection mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable protection tubes, and in particular relates to an MPP cable protection tube structure. Background Art

[0002] Cable protection tubes are also known as cable tubes, power cable tubes, cement cable tubes, power drain tubes, and power cable protection tubes. They are primarily installed where communication cables and power lines intersect to prevent power line disconnections and short circuits, which could lead to live communication cables and wire ropes. They protect cables, switches, and machine boards, ultimately preventing damage to the entire device. They also provide some isolation from magnetic field interference from the power lines.

[0003] The main shortcomings of existing technologies include insufficient mechanical strength and compressive resistance. Traditional MPP (modified polypropylene) pipes are prone to deformation and cracking in complex geological conditions, such as high-load pavement and frozen soil. Their compressive resistance is particularly limited in deep burials or under vehicle overrun. This is due to a single material formulation and suboptimal pipe wall design, including inappropriate corrugation height and spacing, and a lack of reinforcement.

[0004] Problems with high temperature resistance and weather resistance: It is easy to soften when exposed to high temperature environment for a long time, and is prone to aging and cracking under ultraviolet radiation. The upper temperature resistance limit of polypropylene substrate is low, usually ≤110℃, and not enough anti-UV agents or heat stabilizers are added.

[0005] In addition, the pipe section connections rely on ordinary sockets or gluing, which are prone to water seepage and disconnection, causing the cable to be damp or mud to invade. This is because the interface structure design is simple and lacks self-locking or elastic sealing elements. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the MPP cable protection tube structure has insufficient mechanical strength and compressive resistance, and lacks optimization of the connection method.

[0007] The technical solution adopted by the present invention is as follows:

[0008] The present invention proposes an MPP cable protection tube structure, including a protection tube body, a first connecting member is provided at the front end of the protection tube body, and a second connecting member is provided at the rear end of the protection tube body. The protection tube body includes an inner wall smooth layer, an intermediate corrugated pressure-resistant layer and an outer wall wear-resistant layer, which are compounded in sequence from the inside to the outside. The corrugated cross-section of the intermediate corrugated pressure-resistant layer is trapezoidal, and the outer wall wear-resistant layer is coated with a polyurethane coating.

[0009] Furthermore, the inner wall smooth layer is made of high-density modified polypropylene material to reduce friction resistance when the cable is passed through. The outer wall wear-resistant layer is made of silica-modified polypropylene with a thickness of 3mm to resist external mechanical wear and ultraviolet aging.

[0010] Furthermore, rubber sealing rings are provided on the outer sides of the first connecting member and the second connecting member, and welding seams are provided on the first connecting member and the second connecting member.

[0011] Furthermore, a square-shaped holder is fixedly connected to the side wall of the first connecting member, and a connecting piece movably plugged into the square-shaped holder is fixedly connected to the side wall of the second connecting member. A fixing bolt penetrating the square-shaped holder is screwed onto the connecting piece.

[0012] Furthermore, grooves are provided at the upper and lower parts of the connecting member, a spring is fixed in the groove, and a limit block is fixed at the top end of the spring.

[0013] Furthermore, the upper and lower parts of the U-shaped card seat are fixedly connected to U-shaped frames, the U-shaped frame is screwed with a threaded rod, the lower end of the threaded rod is fixedly connected to a pressure plate that cooperates with the limit block, and the upper and lower parts of the U-shaped card seat are provided with limit grooves corresponding to the limit block.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows:

[0015] 1. Optimize the structure and adopt a multi-layer composite design to improve compressive strength and enhance mechanical properties;

[0016] 2. Modular interface: Develop a socket-type locking joint with a rubber sealing ring, or a double insurance structure of hot melt welding + mechanical snap fastening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the internal structure of the protective tube body in an embodiment of the present invention;

[0019] Figure 3 A reference diagram showing the first connecting member and the second connecting member in use;

[0020] Figure 4 is a structural diagram of the connecting piece;

[0021] Figure 5 It is a structural diagram of a U-shaped card seat.

[0022] Among them, 1. Protective tube body; 11. First connecting member; 12. Second connecting member; 13. Inner wall smooth layer; 14. Intermediate corrugated pressure-resistant layer; 15. Outer wall wear-resistant layer; 16. Polyurethane coating; 2. Rubber sealing ring; 21. Welding seam; 3. U-shaped holder; 31. Connector; 32. Fixing bolt; 4. Groove; 41. Spring; 42. Limit block; 5. U-shaped frame; 51. Threaded rod; 52. Pressure plate; 53. Limit groove. DETAILED DESCRIPTION

[0023] Example 1:

[0024] like Figure 1 、 Figure 2 、 Figure 3 As shown, the present invention proposes an MPP cable protection tube structure, comprising a tube body 1, with a first connecting member 11 disposed at the front end and a second connecting member 12 disposed at the rear end. The tube body 1 comprises, from the inside out, an inner smooth layer 13, an intermediate corrugated pressure-resistant layer 14, and an outer wear-resistant layer 15. The corrugated intermediate corrugated pressure-resistant layer 14 has a trapezoidal cross-section, and the outer wear-resistant layer 15 is coated with a polyurethane coating 16. The inner smooth layer 13 is made of high-density modified polypropylene to reduce frictional resistance during cable routing. The outer wear-resistant layer 15 is made of silica-modified polypropylene with a thickness of 3 mm to resist external mechanical wear and UV aging. Rubber sealing rings 2 are disposed on the outer sides of the first and second connecting members 11, 12. Welded seams 21 are provided on the first and second connecting members 11, 12 to enhance sealing. The welded seams 21 are welded when the first and second connecting members 11, 12 are connected end-to-end for installation.

[0025] Example 2:

[0026] like Figure 3 、 4 As shown in , 5, a U-shaped holder 3 is fixed to the side wall of the first connecting member 11, and a connecting member 31 movably inserted into the U-shaped holder 3 is fixed to the side wall of the second connecting member 12, and a fixing bolt 32 that passes through the U-shaped holder 3 is screwed on the connecting member 31; grooves 4 are provided at the upper and lower parts of the connecting member 31, a spring 41 is fixed in the groove 4, and the top of the spring 41 is fixed to a limiting block 42; U-shaped frames 5 are fixed to the upper and lower parts of the U-shaped holder 3, a threaded rod 51 is screwed on the U-shaped frame 5, and the lower end of the threaded rod 51 is fixed to a pressure plate 52 that cooperates with the limiting block 42, and limiting grooves 53 corresponding to the limiting block 42 are provided at the upper and lower parts of the U-shaped holder 3.

[0027] During specific use, the user inserts the connecting piece 31 into the U-shaped holder 3 and fixes it with the fixing bolt 32. In order to prevent the fixing bolt 32 from loosening and falling, the limit block 42 is pushed out from the limit groove 53 by the spring 41 for limiting. When disassembling, the pressure plate 52 can be moved downward by rotating the threaded rod 51 to achieve the downward pressure of the limit block 42, which facilitates the removal of the connecting piece 31 from the U-shaped holder 3.

[0028] The above is the entire usage process of an MPP cable protection tube structure.

[0029] The present invention and its embodiments are described above. Such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. An MPP cable protection tube structure, comprising a protection tube body (1), characterized in that: The front end of the protection tube body (1) is provided with a first connecting member (11), and the rear end of the protection tube body (1) is provided with a second connecting member (12). The protection tube body (1) comprises an inner wall smooth layer (13), an intermediate corrugated pressure-resistant layer (14), and an outer wall wear-resistant layer (15) which are sequentially compounded from the inside to the outside. The corrugated cross section of the intermediate corrugated pressure-resistant layer (14) is trapezoidal, and the outer wall wear-resistant layer (15) is coated with a polyurethane coating (16).

2. The MPP cable protection tube structure according to claim 1, characterized in that: The inner wall smooth layer (13) is made of high-density modified polypropylene material to reduce friction resistance when the cable is passed through. The outer wall wear-resistant layer (15) is made of silicon dioxide modified polypropylene with a thickness of 3mm to resist external mechanical wear and ultraviolet aging.

3. The MPP cable protection tube structure according to claim 1, characterized in that: Rubber sealing rings (2) are provided on the outside of the first connecting member (11) and the second connecting member (12), and welding seams (21) are provided on the first connecting member (11) and the second connecting member (12).

4. The MPP cable protection tube structure according to claim 1, characterized in that: A square-shaped holder (3) is fixedly connected to the side wall of the first connecting member (11), and a connecting piece (31) movably plugged into the square-shaped holder (3) is fixedly connected to the side wall of the second connecting member (12), and a fixing bolt (32) penetrating the square-shaped holder (3) is screwed onto the connecting piece (31).

5. The MPP cable protection tube structure according to claim 4, characterized in that: The upper and lower parts of the connecting member (31) are both provided with grooves (4), a spring (41) is fixedly connected in the groove (4), and the top end of the spring (41) is fixedly connected to a limit block (42).

6. The MPP cable protection tube structure according to claim 5, characterized in that: The upper and lower parts of the U-shaped card seat (3) are fixedly connected to a U-shaped frame (5), a threaded rod (51) is screwed on the U-shaped frame (5), the lower end of the threaded rod (51) is fixedly connected to a pressure plate (52) that matches the limit block (42), and the upper and lower parts of the U-shaped card seat (3) are both provided with limit grooves (53) corresponding to the limit block (42).

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