A special cable for laying at high altitude and high drop

Abstract

The utility model relates to a special cable for laying at high altitude and high drop, comprising an outer protective sheath, a shielding layer fixedly installed on the inner wall of the outer protective sheath, an insulating layer fixedly installed on the inner wall of the shielding layer, a cable core fixedly installed inside the insulating layer, and a filler filled inside the insulating layer and in the gaps between the cable cores. The special cable for laying at high altitude and high drop, by arranging the coordination between the outer protective layer, the thermal insulation layer, the cold-resistant layer and the inner protective layer, is multi-layered in design to meet the requirements of using cables at high altitudes and to improve the service life of the cable; the outer protective layer is made of extremely cold-resistant polyolefin material, which can provide light weight, low temperature resistance, chemical corrosion resistance and good electrical insulation performance, and ensure the normal operation of the cable under extremely cold conditions; the thermal insulation layer is made of polyethylene material, which can provide the cable with good electrical insulation, moisture resistance and environmental protection.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a special cable used for laying at high altitudes and high drop heights. Background Art

[0002] As the altitude of all wires and cables increases, the air becomes thinner, the temperature drops, and the solar ultraviolet radiation becomes more intense. In this environment, the corresponding insulation performance strength value of the insulating material will decrease, the plastic layer will harden and brittle at low temperatures, and the sheath will age faster, thereby shortening the product life. This will result in a decrease in the safety factor of laying and use, especially in high-altitude areas above 1,000 meters above sea level, where the risk is higher. Therefore, single-line conduit wiring is mostly used for wiring in plateau buildings, one reason is to increase the current carrying capacity of the cable, and the other is to reduce ultraviolet radiation.

[0003] Most of the cable products on the current market are suitable for low-altitude areas. They either have single performance or the material performance cannot meet the long-term service life requirements. It is difficult to find cable products that can be used in high-altitude areas. When used at high altitudes, due to the low temperature, the plastic is very easy to harden and become brittle, and the cable is very easy to be damaged when used in motion. Therefore, a special cable for laying high altitude and high drop is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a special cable for laying at high altitudes and high drop, which has the advantages of adapting to high altitude conditions and solves the problem that when used at high altitudes, the plastic easily becomes hard and brittle due to the low temperature, and the cable is easily damaged when used in a mobile manner.

[0005] To achieve the above object, the utility model provides the following technical solution: a special cable for laying at high altitude and high drop, comprising an outer protective sheath, a shielding layer fixedly installed on the inner wall of the outer protective sheath, an insulating layer fixedly installed on the inner wall of the shielding layer, a cable core fixedly installed inside the insulating layer, and a filler filled inside the insulating layer and in the gap between the cable cores;

[0006] The outer protective cover comprises an outer protective layer located inside the outer protective cover, a heat preservation layer is fixedly installed on the inner wall of the outer protective layer, a cold-resistant layer is fixedly installed on the inner wall of the heat preservation layer, and an inner protective layer is fixedly installed on the inner wall of the cold-resistant layer.

[0007] Preferably, the outer protective layer is made of extreme cold resistant polyolefin material, and the thermal insulation layer is made of polyethylene material.

[0008] Preferably, the insulation thickness increase coefficient of the insulation layer is in the range of 1.11 to 1.67, and the shielding layer is woven with tinned copper wires.

[0009] Preferably, the cold-resistant layer is made of cross-linked polyethylene material, and the inner protective layer is made of an aluminum protective cover.

[0010] Preferably, an anti-cold agent is added between the inner protective layer and the shielding layer.

[0011] Preferably, the filler is made of polypropylene filling rope.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] 1. This special cable is used for laying at high altitudes and high drop. By setting up the coordination between the outer protective layer, the thermal insulation layer, the cold-resistant layer and the inner protective layer, the cable is designed with multiple layers to meet the requirements for using cables at high altitudes and to increase the service life of the cable. The outer protective layer is made of extremely cold-resistant polyolefin material, which can provide light weight, low temperature resistance, chemical corrosion resistance and good electrical insulation performance, ensuring the normal operation of the cable under extremely cold conditions. The thermal insulation layer is made of polyethylene material, which can provide the cable with good electrical insulation, moisture resistance and environmental protection, and also has certain advantages in cost control.

[0014] 2. This special cable is used for laying at high altitudes and high drop. The cold-resistant layer is made of cross-linked polyethylene material, which ensures the safety and reliability of the cable under low temperature and complex climatic conditions. The inner protective layer is made of an aluminum protective sheath, which effectively prevents the invasion of water vapor into the insulation and the aging of the cable insulation due to strong ultraviolet rays. The special cable with the above multi-layer design can not only adapt to the harsh environment of high altitude areas, but also reduce engineering and maintenance costs while ensuring safe and reliable power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 A magnified view of the structure in the middle.

[0018] In the figure: 1. outer protective sheath; 101. outer protective layer; 102. thermal insulation layer; 103. cold-resistant layer; 104. inner protective layer; 2. shielding layer; 3. insulating layer; 4. cable core; 5. filler. DETAILED DESCRIPTION

[0019] 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 in 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.

[0020] See also Figure 1-3 In this embodiment, a special cable for laying at high altitude and high drop comprises an outer protective sheath 1, a shielding layer 2 is fixedly installed on the inner wall of the outer protective sheath 1, an insulating layer 3 is fixedly installed on the inner wall of the shielding layer 2, a cable core 4 is fixedly installed inside the insulating layer 3, and a filler 5 is filled in the gaps between the cable cores 4 inside the insulating layer 3.

[0021] It should be noted that the cable is an electric energy or signal transmission device, usually composed of several or several groups of wires, and the outer protective sheath 1, shielding layer 2, insulating layer 3, cable core 4 and filler 5 arranged above can make the composed cable suitable for use in high altitude areas.

[0022] The outer protective cover 1 comprises an outer protective layer 101 located inside the outer protective cover 1 , a heat preservation layer 102 is fixedly mounted on the inner wall of the outer protective layer 101 , a cold-resistant layer 103 is fixedly mounted on the inner wall of the heat preservation layer 102 , and an inner protective layer 104 is fixedly mounted on the inner wall of the cold-resistant layer 103 .

[0023] The outer protective layer 101 is made of extremely cold-resistant polyolefin material, and the thermal insulation layer 102 is made of polyethylene material.

[0024] Specifically, the outer protective layer 101 is made of extremely cold-resistant polyolefin material, which can provide light weight, low temperature resistance, chemical corrosion resistance and good electrical insulation performance, ensuring the normal operation of the cable under extremely cold conditions; the insulation layer 102 is made of polyethylene material, which can provide the cable with good electrical insulation, moisture resistance and environmental protection, and also has certain advantages in cost control.

[0025] The insulation thickness increase coefficient of the insulation layer 3 is in the range of 1.11 to 1.67, and the shielding layer 2 is woven by tinned copper wires.

[0026] Specifically, the insulation thickness of the insulating layer 3 increases. When the altitude is 2000m to 5000m, the thickness increase coefficient ranges from 1.11 to 1.67, which compensates for the decrease in insulation strength caused by the increase in altitude. At the same time, the shielding layer 2 helps to improve the shielding effect of the cable and effectively block external electromagnetic interference.

[0027] The cold-resistant layer 103 is made of cross-linked polyethylene material, and the inner protective layer 104 is made of an aluminum protective cover.

[0028] Specifically, by setting up a cold-resistant layer 103 made of cross-linked polyethylene material, the cable is safe and reliable under low temperature and complex climatic conditions; the inner protective layer 104 is made of an aluminum protective sheath, which effectively prevents the intrusion of water vapor into the insulation and also prevents the aging of the cable insulation due to strong ultraviolet rays.

[0029] An anti-cold agent is added between the inner protective layer 104 and the shielding layer 2 .

[0030] Specifically, the antifreeze agent can lower the brittle temperature of the cable material, allowing the cable to maintain better flexibility and elasticity in a low temperature environment, thereby preventing the material from hardening or cracking.

[0031] The filler 5 is made of polypropylene filling rope.

[0032] Specifically, the polypropylene filling rope can fill the gaps inside the cable to keep the cable in a round shape, and at the same time can absorb excess moisture, reduce the corrosion of moisture on the metal components inside the cable, and extend the service life of the cable.

[0033] In summary, the special cable used for laying at high altitude and high drop, through the coordination between the outer protective layer 101, the thermal insulation layer 102, the cold-resistant layer 103 and the inner protective layer 104, is designed with multiple layers to meet the requirements for using cables at high altitudes and to increase the service life of the cable; the outer protective layer 101 is made of extremely cold-resistant polyolefin material, which can provide light weight, low temperature resistance, chemical corrosion resistance and good electrical insulation performance, thereby ensuring the normal operation of the cable under extremely cold conditions; the thermal insulation layer 102 is made of polyethylene material, which can provide the cable with good electrical insulation, moisture resistance and environmental protection, and also has certain advantages in cost control.

[0034] In addition, by setting up the cold-resistant layer 103 made of cross-linked polyethylene material, the cable is safe and reliable under low temperature and complex climatic conditions; the inner protective layer 104 is made of an aluminum protective sheath, which effectively prevents the invasion of water vapor into the insulation and also prevents the aging of the cable insulation due to strong ultraviolet rays; the special cable with the above multi-layer design can not only adapt to the harsh environment of high-altitude areas, but also reduce engineering and maintenance costs while ensuring safe and reliable power supply.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special cable for laying at high altitude and high drop, comprising an outer protective sheath (1), characterized in that: A shielding layer (2) is fixedly mounted on the inner wall of the outer protective sleeve (1), an insulating layer (3) is fixedly mounted on the inner wall of the shielding layer (2), a cable core (4) is fixedly mounted inside the insulating layer (3), and a filler (5) is filled inside the insulating layer (3) and in the gaps between the cable cores (4); The outer protective cover (1) comprises an outer protective layer (101) located inside the outer protective cover (1), a heat-insulating layer (102) is fixedly mounted on the inner wall of the outer protective layer (101), a cold-resistant layer (103) is fixedly mounted on the inner wall of the heat-insulating layer (102), and an inner protective layer (104) is fixedly mounted on the inner wall of the cold-resistant layer (103).

2. The special cable for laying at high altitude and high drop according to claim 1, characterized in that: The outer protective layer (101) is made of an extremely cold-resistant polyolefin material, and the thermal insulation layer (102) is made of a polyethylene material.

3. The special cable for laying at high altitude and high drop according to claim 1, characterized in that: The insulation thickness increase coefficient of the insulation layer (3) is in the range of 1.11 to 1.67, and the shielding layer (2) is woven from tinned copper wires.

4. The special cable for laying at high altitude and high drop according to claim 1, characterized in that: The cold-resistant layer (103) is made of a cross-linked polyethylene material, and the inner protective layer (104) is made of an aluminum protective sleeve.

5. The special cable for laying at high altitude and high drop according to claim 1, characterized in that: An anti-cold agent is added between the inner protective layer (104) and the shielding layer (2).

6. The special cable for laying at high altitude and high drop according to claim 1, characterized in that: The filler (5) is made of polypropylene filling rope.

Images