Longitudinally-laid extremely-cold-resistant cable for high-latitude region

Abstract

The utility model relates to the technical field of cables, and discloses a longitudinally laid extremely cold resistant cable for high latitude areas, which comprises a conductor layer, an insulating layer fixedly arranged on the outer side of the conductor layer, a waterproof layer fixedly arranged on the outer side of the insulating layer, an inner reinforcing layer fixedly connected to the outer side of the waterproof layer, and an outer reinforcing layer fixedly connected to the outer side of the inner reinforcing layer. The outer side of the inner reinforcing layer is filled with a filling layer, the outer side of the filling layer is wrapped with a wrapping layer, the outer side of the wrapping layer is fixedly provided with an inner lining layer, the outer side of the inner lining layer is fixedly provided with an armor layer, and the outer side of the armor layer is fixedly provided with an outer sheath. According to the utility model, the cold-resistant, waterproof, flame-retardant, mechanical strength, high-efficiency conductive and tensile properties of the cable are ensured through the multi-layer structure, and sliding of the cable in the laying process is reduced through arrangement of the friction blocks.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to an extreme cold-resistant cable for longitudinal laying in high-latitude areas. Background Art

[0002] The biggest characteristic of high-latitude areas is coldness. This is because the earth's axis of rotation has an inclination of 23.5° relative to the normal of the plane of revolution around the sun, which causes sunlight to only shine on the area obliquely, and there is very little radiated heat. Half of the year in high-latitude areas is a long night, and the sun rises and sets again. Winter in high-latitude areas lasts for 9 months each year, and the average temperature in the coldest month is below -40℃ to -50℃.

[0003] However, when ordinary cables encounter such low temperatures, the insulation and sheath will become hard and brittle, causing great inconvenience and safety hazards for the laying and use of cables, and posing a major obstacle to production and construction in extremely cold environments in high-latitude areas. In addition, extreme cold will limit the tensile performance of the cable and cause the cable to break. Therefore, it is imperative to develop an extremely cold-resistant cable for longitudinal laying in high-latitude areas. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an extreme cold-resistant cable for longitudinal laying in high-latitude areas.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a longitudinally laid extreme cold-resistant cable for high-latitude areas, comprising a conductor layer, an insulating layer fixedly provided on the outside of the conductor layer, a waterproof layer fixedly provided on the outside of the insulating layer, an inner reinforcing layer fixedly connected to the outside of the waterproof layer, a filling layer filled on the outside of the inner reinforcing layer, a wrapping layer wrapped on the outside of the filling layer, an inner lining layer fixedly provided on the outside of the wrapping layer, an armor layer fixedly provided on the outside of the inner lining layer, and an outer sheath fixedly provided on the outside of the armor layer.

[0006] As a further description of the above technical solution: the conductor layer is formed by twisting together multiple strands of soft copper wires drawn from oxygen-free copper rods.

[0007] As a further description of the above technical solution: the interior of the insulating layer is filled with low-temperature cross-linked polyethylene, and its thickness is 2mm-3mm.

[0008] As a further description of the above technical solution: the interior of the waterproof layer is filled with high-density polyethylene, the inner reinforcement layer is woven aramid fiber, and a plurality of protrusions are provided on the inner reinforcement layer, and the protrusions are embedded in the interior of the waterproof layer.

[0009] As a further description of the above technical solution: the interior of the filling layer is filled with lightweight polypropylene which is wrapped around the outer sides of the multiple inner reinforcement layers.

[0010] As a further description of the above technical solution: the wrapping layer is a flame retardant tape wrapped overlappingly on the outside of the filling layer.

[0011] As a further description of the above technical solution: the inner lining layer and the outer sheath are both made of -52°C halogen-free low-smoke flame-retardant polymer material, and friction blocks arranged in a ring array are fixedly provided on the outside of the outer sheath.

[0012] As a further description of the above technical solution: the armor layer is made of a sparsely wound layer of high-strength, tensile-resistant, corrosion-resistant and rust-resistant special galvanized steel wire.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, the multi-layer structure ensures the cable's cold resistance, waterproofness, flame retardancy and mechanical strength. The efficient conductivity and tensile strength of the conductor layer, combined with the excellent insulation capacity of the low-temperature cross-linked polyethylene insulation layer, ensure the stability and safety of power transmission. The close combination of the waterproof layer and the high-strength aramid fiber inner reinforcement layer not only effectively blocks moisture penetration, but also greatly improves the overall stability of the cable. The dual protection of the outer layer of halogen-free low-smoke flame retardant material and the armor layer ensures the safe use of the cable under extreme conditions. The setting of the friction block also improves the installation stability and reduces the risk of sliding during the laying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a longitudinally laid extreme cold-resistant cable for use in high-latitude areas proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a longitudinally laid extreme cold-resistant cable for use in high-latitude areas proposed by the utility model;

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0018] Legend:

[0019] 1. Conductor layer; 2. Insulation layer; 3. Waterproof layer; 4. Inner reinforcement layer; 5. Filling layer; 6. Wrapping layer; 7. Inner lining layer; 8. Armor layer; 9. Outer sheath; 10. Protrusion; 11. Friction block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Reference Figure 1-Figure 3 As shown, a cable resistant to extreme cold for longitudinal laying in high latitudes comprises a conductor layer 1, an insulating layer 2 is fixedly provided on the outside of the conductor layer 1, a waterproof layer 3 is fixedly provided on the outside of the insulating layer 2, an inner reinforcement layer 4 is fixedly provided on the outside of the waterproof layer 3, a filling layer 5 is filled on the outside of the inner reinforcement layer 4, a wrapping layer 6 is wrapped on the outside of the filling layer 5, an inner lining layer 7 is fixedly provided on the outside of the wrapping layer 6, an armor layer 8 is fixedly provided on the outside of the inner lining layer 7, and an outer sheath 9 is fixedly provided on the outside of the armor layer 8. The multi-layer structure ensures that the cable is cold-resistant and waterproof. , flame retardancy and mechanical strength, the efficient conductivity and tensile strength of the conductor layer 1, combined with the excellent insulation ability of the low-temperature cross-linked polyethylene insulation layer 2, ensure the stability and safety of power transmission, and the close combination of the waterproof layer 3 and the high-strength aramid fiber inner reinforcement layer 4 not only effectively blocks moisture penetration, but also greatly improves the overall stability of the cable. The double protection of the outer layer of halogen-free low-smoke flame retardant material and the armor layer 8 provides guarantee for the safe use of the cable under extreme conditions. The setting of the friction block 11 also improves the installation stability and reduces the risk of sliding during the laying process.

[0022] The conductor layer 1 is made of multiple strands of soft copper wire drawn from oxygen-free copper rods, and has high conductivity and good tensile strength, ensuring stable current transmission even in extremely cold conditions.

[0023] The interior of the insulating layer 2 is filled with low-temperature cross-linked polyethylene with a thickness of 2mm-3mm. It can still maintain excellent insulation performance at low temperatures, effectively isolate the conductor from the external environment, prevent current leakage, and ensure the safety of power transmission.

[0024] The interior of the waterproof layer 3 is filled with high-density polyethylene, the inner reinforcement layer 4 is woven aramid fiber, and a number of protrusions 10 are provided on the inner reinforcement layer 4. The protrusions 10 are embedded in the interior of the waterproof layer 3. The waterproof layer 3 has good waterproof performance and can effectively prevent water and moisture from penetrating into the interior of the cable, preventing aging and short circuit problems of the insulation layer caused by moisture. The inner reinforcement layer 4 has high strength and low temperature resistance, which can enhance the mechanical strength of the cable. At the same time, the protrusions 10 on it enhance the bonding force with the waterproof layer, further improving the overall stability of the cable.

[0025] The filling layer 5 is filled with lightweight polypropylene and wrapped around the outside of multiple inner reinforcement layers 4. The filling layer 5 plays a supporting and buffering role, protecting the internal structure of the cable from external extrusion and wear, while maintaining the circular structure of the cable and improving the pressure resistance.

[0026] The wrapping layer 6 is a flame retardant tape wrapped around the outer side of the filling layer 5 to provide additional flame retardant protection, reduce the risk of fire, and ensure the safe use of the cable under extreme conditions.

[0027] The inner lining layer 7 and the outer sheath 9 are both made of -52°C halogen-free, low-smoke flame-retardant polymer material, and the outer side of the outer sheath 9 is fixedly provided with friction blocks 11 arranged in a ring array. The inner lining layer 7 and the outer sheath 9 have excellent cold resistance, flame retardancy and environmental protection properties, and can maintain good mechanical and electrical properties even in extremely cold environments. The friction blocks in the ring array increase the friction between the cable and the ground or other objects, prevent the cable from sliding or shifting during the laying process, and ensure the stable installation and use of the cable.

[0028] The armor layer 8 is made of a sparsely wound layer of high-strength, tensile-resistant, corrosion-resistant and rust-resistant special galvanized steel wire, which provides additional mechanical protection to prevent the cable from external physical damage and ensure the safety and stability of the cable during laying and use.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An extreme cold-resistant cable for longitudinal installation in high latitude areas, comprising a conductor layer (1), characterized in that: An insulating layer (2) is fixedly provided on the outer side of the conductor layer (1), a waterproof layer (3) is fixedly provided on the outer side of the insulating layer (2), an inner reinforcing layer (4) is fixedly connected to the outer side of the waterproof layer (3), a filling layer (5) is filled on the outer side of the inner reinforcing layer (4), a wrapping layer (6) is wrapped on the outer side of the filling layer (5), an inner lining layer (7) is fixedly provided on the outer side of the wrapping layer (6), an armor layer (8) is fixedly provided on the outer side of the inner lining layer (7), and an outer sheath (9) is fixedly provided on the outer side of the armor layer (8).

2. The cable for longitudinally laying extreme cold-resistant cables for high latitude areas according to claim 1, characterized in that: The conductor layer (1) is formed by twisting together multiple strands of soft copper wire drawn from oxygen-free copper rods.

3. The cable for longitudinally laying extreme cold-resistant cables for high latitude areas according to claim 1, characterized in that: The interior of the insulating layer (2) is filled with low-temperature cross-linked polyethylene, and the thickness thereof is 2 mm to 3 mm.

4. The cable for longitudinally laying extreme cold-resistant cables for high latitude areas according to claim 1, characterized in that: The interior of the waterproof layer (3) is filled with high-density polyethylene, the inner reinforcement layer (4) is made of woven aramid fiber, and a plurality of protrusions (10) are provided on the inner reinforcement layer (4), and the protrusions (10) are embedded in the interior of the waterproof layer (3).

5. The cable for longitudinally laying extreme cold-resistant cables for high latitude areas according to claim 1, characterized in that: The filling layer (5) is filled with lightweight polypropylene and wrapped around the outer sides of the multiple inner reinforcement layers (4).

6. The cable for longitudinally laying extreme cold-resistant cables for high latitude areas according to claim 1, characterized in that: The wrapping layer (6) is a flame retardant tape wrapped overlappingly on the outside of the filling layer (5).

7. The cable for longitudinally laying extreme cold-resistant cables for high latitude areas according to claim 1, characterized in that: The inner lining layer (7) and the outer sheath (9) are both made of -52°C halogen-free, low-smoke, flame-retardant polymer material, and friction blocks (11) arranged in an annular array are fixedly provided on the outer side of the outer sheath (9).

8. The cable for longitudinally laying extreme cold-resistant cables for use in high latitude areas according to claim 1, characterized in that: The armor layer (8) is formed by sparsely winding a layer of high-strength, tensile-resistant, corrosion-resistant and rust-resistant special galvanized steel wire.

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