Distortion-resistant and cold-resistant flame-retardant power cable

Abstract

The utility model discloses a flame-retardant power cable capable of resisting distortion and cold, which relates to the technical field of power cables and comprises a plurality of groups of core bodies, the plurality of groups of core bodies are annularly distributed by taking a glass fiber rope as an axis, an aluminum plastic sleeve is arranged on the outer wall of the glass fiber rope, a filling layer is arranged between the plurality of groups of core bodies and the glass fiber rope, and a glass fiber sleeve is sleeved on the outer wall of the filling layer; a lining layer is arranged on the outer wall of the glass fiber sleeve, and a reinforcing sleeve is arranged on the outer wall of the lining layer. According to the utility model, the plurality of groups of core bodies are arranged along the glass fiber rope, so that the heat insulation and cold resistance effects of the glass fiber rope at the axis in the cable are ensured, and the reinforcing sleeve is arranged on the outer walls of the glass fiber rope and the core bodies, so that the reinforcing sleeve can stably reinforce the inner glass fiber rope and the core bodies under the action of the polygonal structure of the reinforcing sleeve; and the rock wool layer is arranged in the reinforcing sleeve, so that the cold-resistant and flame-retardant effects of the power cable are further improved, the overall structure of the cable is strengthened, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a flame-retardant power cable which is twist-resistant and cold-resistant. Background Art

[0002] Flame-retardant cable refers to a cable that, under specified test conditions, can be burned. After the test fire source is removed, the spread of the flame is limited to a limited range, and the residual flame or residual burning can extinguish itself within a limited time. The fundamental characteristics are: it may be burned and unable to operate in the event of a fire, but the spread of the fire can be prevented. In layman's terms, if a fire occurs in the wires, the burning can be limited to a local area and will not spread, thereby protecting various other equipment and avoiding greater losses. With the rapid development of the electric power industry and urban construction, all walks of life have higher and higher requirements for cables. Traditional flame-retardant cables have a simple structure and are insufficient in cold resistance and torsion resistance. Ordinary torsion-resistant cables usually only have an anti-twist structure on the outside or inside of the cable, and have poor bending performance.

[0003] The Chinese patent document publication number CN214753074U discloses a torsion-resistant and cold-resistant flame-retardant power cable. The torsion-resistant and cold-resistant flame-retardant power cable discloses that the outer side of the torsion-resistant and cold-resistant flame-retardant cable body is wrapped with an outer torsion-resistant protective structure. The torsion-resistant and cold-resistant flame-retardant cable body includes an torsion-resistant and cold-resistant flame-retardant structure. The outer wall of the torsion-resistant and cold-resistant flame-retardant structure is wrapped with a protective outer layer. The inner wall of the torsion-resistant and cold-resistant flame-retardant structure is equipped with a cold-resistant and flame-retardant chamber structure. Cable cores are evenly inserted in the cold-resistant and flame-retardant chamber structure. Filling ropes are filled between the cable cores and the inner wall of the cold-resistant and flame-retardant chamber structure. The torsion-resistant and cold-resistant flame-retardant cable body and the outer torsion-resistant protective structure are used in combination. The internal torsion-resistant structure retains sufficient bending performance, and cooperates with the external torsion-resistant structure to supplement the torsion resistance. When the cable needs to be bent, the external torsion-resistant structure can be removed.

[0004] The above-mentioned flame-retardant power cable that is resistant to twisting and cold improves the flame-retardant and cold-resistant performance of the cable through a cold-resistant and flame-retardant chamber structure. However, the bending operation of the flame-retardant power cable through the detachable anti-twisting structure is relatively complicated, which increases the construction difficulty and efficiency. Moreover, the setting of a single outer insulation cotton layer has limited protection effect on the insulation cotton layer, which easily reduces the service life and work quality of the insulation cotton layer. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the existing flame-retardant power cable, that the bending operation is relatively complicated through the detachable anti-twisting structure, which increases the construction difficulty and efficiency, and the provision of a single outer insulation cotton layer has limited protection effect on the insulation cotton layer, which easily reduces the service life and working quality of the insulation cotton layer, and to propose a flame-retardant power cable that is anti-twisting and cold-resistant.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A flame-retardant power cable that is resistant to twisting and cold, comprising a plurality of cores, the plurality of cores being distributed in an annular pattern along a glass fiber rope as an axis, and an aluminum-plastic sleeve being provided on the outer wall of the glass fiber rope, a filling layer being provided between the plurality of cores and the glass fiber rope, and a glass fiber sleeve being provided on the outer wall of the filling layer;

[0008] The outer wall of the fiberglass sleeve is provided with an inner lining layer, and the outer wall of the inner lining layer is provided with a reinforcing sleeve, the reinforcing sleeve is in a polygonal structure, and a rock wool layer is filled between the reinforcing sleeve and the inner lining layer.

[0009] As a further description of the above technical solution:

[0010] The outer wall of the reinforcement sleeve is provided with a frame, and the outer wall of the frame is connected with a wrapping layer through a braided overall shield.

[0011] As a further description of the above technical solution:

[0012] The reinforcement sleeve is a pentagonal structure, and the reinforcement sleeve and the frame are plugged and installed through a slot.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the wrapping layer is provided with an outer sheath, and a plurality of groups of anti-torsion strips are arranged on the surface of the outer sheath.

[0015] As a further description of the above technical solution:

[0016] The multiple groups of anti-torsion bars are distributed in a circular shape with equal intervals, and the multiple groups of anti-torsion bars are symmetrically arranged in even numbers.

[0017] As a further description of the above technical solution:

[0018] The outer wall of the core is provided with an insulating layer, and the outer wall of the insulating layer is provided with a flame retardant layer through an aluminum strip.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] 1. In the utility model, by arranging multiple groups of core bodies along the glass fiber rope, the heat insulation and cold resistance effect of the glass fiber rope at the inner axis of the cable is ensured, and by arranging a reinforcing sleeve on the outer wall of the glass fiber rope and the core body, under the effect of the polygonal structure of the reinforcing sleeve, the reinforcing sleeve can stably reinforce the internal glass fiber rope and the core body, and by arranging a rock wool layer inside the reinforcing sleeve, the cold resistance and flame retardancy of the power cable are further improved, and the overall structure of the cable is strengthened, which is conducive to extending the service life of the cable.

[0021] 2. In the utility model, by strengthening the plug-in setting of the sleeve and the frame, the user can stably plug and install the cable, and it is convenient for the user to perform block maintenance and upkeep on the inside of the cable at a later time, thereby reducing the maintenance cost of the cable. At the same time, by arranging anti-torsion strips on the outer wall of the outer sheath, the user can lay the cable stably through the symmetrically arranged anti-torsion strips, thereby further improving the anti-twisting effect of the cable, and the structure is simple and maintenance is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a flame-retardant power cable that is resistant to twisting and coldness in the utility model;

[0023] Figure 2 This is a front view structural schematic diagram of a flame-retardant power cable that is resistant to twisting and coldness in the utility model;

[0024] Figure 3 It is a schematic diagram of the three-dimensional connection structure between the reinforcing sleeve and the frame in the utility model.

[0025] Legend:

[0026] 1. Core; 2. Insulation layer; 3. Aluminum tape; 4. Flame retardant layer; 5. Fiberglass rope; 6. Aluminum-plastic sheath; 7. Filling layer; 8. Fiberglass sheath; 9. Lining layer; 10. Rock wool layer; 11. Reinforcement sheath; 12. Frame; 13. Braided overall shield; 14. Wrapping layer; 15. Outer sheath; 16. Anti-twist strip; 17. Slot. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1-Figure 3A flame-retardant power cable that is resistant to twisting and cold, comprising a plurality of cores 1, an insulating layer 2, an aluminum tape 3, a flame-retardant layer 4, a glass fiber rope 5, an aluminum-plastic sheath 6, a filling layer 7, a glass fiber sheath 8, an inner lining layer 9, a rock wool layer 10, a reinforcing sheath 11, a frame 12, a braided overall shield 13, a wrapping layer 14, an outer sheath 15, an anti-torsion strip 16 and a slot 17. An insulating layer 2 is arranged on the outer wall of the core 1, and the insulating layer 2 can adopt a polyethylene insulating layer 2, and a flame-retardant layer 4 is arranged on the outer wall of the insulating layer 2 through an aluminum tape 3. The arrangement of the aluminum tape 3 further improves the service life of a single core 1, and the structure is simple, specifically The three groups of core bodies 1 are distributed in a ring shape along the glass fiber rope 5 as the axis, so that the glass fiber rope 5 is at the axis formed by the multiple groups of core bodies 1, and considering the overall effect of the core body 1 and the glass fiber rope 5, an aluminum-plastic sleeve 6 is arranged on the outer wall of the glass fiber rope 5 to ensure the overall working effect of the power cable. At the same time, a filling layer 7 is also arranged between the multiple groups of core bodies 1 and the glass fiber rope 5 to ensure the stability of the structure of the core body 1 and the glass fiber rope 5, and a glass fiber sleeve 8 is arranged on the outer wall of the filling layer 7. Through the arrangement of the glass fiber sleeve 8, the core body 1 and the glass fiber rope 5 achieve stable flame retardant and temperature resistant effects, and provide good electrical performance and anti-interference performance;

[0029] Furthermore, an inner lining layer 9 is arranged on the outer wall of the glass fiber sleeve 8, so that the inner part of the inner lining layer 9 is arranged as a whole inside the reinforcing sleeve 11. Specifically, the reinforcing sleeve 11 is in a pentagonal structure, which ensures the structural strength of the cable and improves the compression resistance. At the same time, a rock wool layer 10 is filled between the reinforcing sleeve 11 and the inner lining layer 9. Under the action of the rock wool layer 10, the internal space of the reinforcing sleeve 11 is reasonably utilized, and the cold resistance and heat insulation effect of the cable is improved, which is conducive to improving the application range of the cable and enhancing the practicality. Furthermore, considering the stability of the reinforcing sleeve 11 during laying, a frame 12 is arranged on the outer wall of the reinforcing sleeve 11, and the outer wall of the frame 12 is in an annular structure. In order to facilitate the flexible connection between the reinforcing sleeve 11 and the frame 12, the reinforcing sleeve 11 and the frame 12 are plugged and installed through a slot 17. Under the action of the slot 17, the reinforcing sleeve 11 and the frame 12 are installed flexibly and conveniently, which is convenient for users to disassemble and maintain the external structure of the frame 12, improves the flexibility and practicality of the cable, and is simple and convenient to operate.

[0030] Furthermore, a sheath 14 is connected to the outer wall of the frame 12 through a braided general shield 13. The arrangement of the braided general shield 13 and the sheath 14 stabilizes the cable structure outside the frame 12, ensuring the anti-interference effect of the cable. At the same time, an outer sheath 15 is provided on the outer wall of the sheath 14, and a plurality of groups of anti-torsion strips 16 are provided on the surface of the outer sheath 15. Specifically, the plurality of groups of anti-torsion strips 16 are distributed equidistantly in a ring shape to ensure the balance of the plurality of groups of anti-torsion strips 16, and the plurality of groups of anti-torsion strips 16 are symmetrically arranged in even numbers. Under the action of the anti-torsion strips 16, the user can carry out balanced and stable laying through the anti-torsion strips 16 symmetrically arranged on the outer wall of the outer sheath 15, which is beneficial to improving the anti-twisting effect of the cable and facilitating the laying construction of the cable.

[0031] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A flame-retardant power cable that is resistant to twisting and cold, comprising a plurality of cores (1), characterized in that: The plurality of core bodies (1) are distributed in an annular shape along the axis of the glass fiber rope (5), and the outer wall of the glass fiber rope (5) is provided with an aluminum-plastic sleeve (6); a filling layer (7) is provided between the plurality of core bodies (1) and the glass fiber rope (5), and the outer wall of the filling layer (7) is provided with a glass fiber sleeve (8); The outer wall of the glass fiber sleeve (8) is provided with an inner lining layer (9), and the outer wall of the inner lining layer (9) is provided with a reinforcing sleeve (11), the reinforcing sleeve (11) is in a polygonal structure, and a rock wool layer (10) is filled between the reinforcing sleeve (11) and the inner lining layer (9).

2. The twist-resistant and cold-resistant flame-retardant power cable according to claim 1, characterized in that: The outer wall of the reinforcement sleeve (11) is provided with a frame (12), and the outer wall of the frame (12) is connected to a wrapping layer (14) via a braided overall shield (13).

3. The twist-resistant and cold-resistant flame-retardant power cable according to claim 2, characterized in that: The reinforcement sleeve (11) is a pentagonal structure, and the reinforcement sleeve (11) and the frame (12) are plugged and installed via a slot (17).

4. The twist-resistant and cold-resistant flame-retardant power cable according to claim 2, characterized in that: The outer wall of the wrapping layer (14) is provided with an outer sheath (15), and a plurality of groups of anti-torsion strips (16) are provided on the surface of the outer sheath (15).

5. The twist-resistant and cold-resistant flame-retardant power cable according to claim 4, characterized in that: The multiple groups of anti-torsion bars (16) are distributed in an annular shape with equal spacing, and the multiple groups of anti-torsion bars (16) are symmetrically arranged in even numbers.

6. The twist-resistant and cold-resistant flame-retardant power cable according to claim 1, characterized in that: The outer wall of the core (1) is provided with an insulating layer (2), and the outer wall of the insulating layer (2) is provided with a flame retardant layer (4) via an aluminum strip (3).

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