High-temperature-resistant anti-interference cable

Abstract

The utility model discloses a high temperature resistant anti-interference cable, specifically relates to the technical field of cables, and comprises a fixed core, six conductive units are arranged outside the fixed core, each conductive unit comprises an insulation wire core and an insulation shielding layer, the insulation wire core is wrapped by the insulation shielding layer, the six conductive units are twisted, and a filling layer is arranged outside the conductive units. A filling layer is arranged outside the cable body, a wrapping layer is wrapped outside the filling layer, a flame-retardant layer is wrapped outside the wrapping layer, a metal braid layer is arranged outside the flame-retardant layer, and a sheath layer is wrapped outside the metal braid layer. According to the utility model, the metal braid layer can transfer heat, the flame retardant layer can prevent the cable from being burnt out by external combustion, the cable can bear working conditions in a high-temperature environment, and normal operation of the cable in the high-temperature environment is ensured; the metal braid layer is arranged to shield the influence of external electromagnetic radiation on internal signals of the cable, and the insulation shielding layer is arranged outside the wire core to better ensure that the internal conductor is not interfered and ensure the stability and reliability of transmission.

Description

[Technical field]

[0001] The utility model relates to the technical field of cables, and more specifically, to a high temperature resistant and anti-interference cable. [Background technology]

[0002] Cables are used to transmit and distribute electric energy. Cables play an important role in the infrastructure construction of my country. Cables are often used in urban underground power grids, power station lead-out lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. The proportion of cables in power lines is gradually increasing. Cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of the power system, including 1-500KV and various voltage levels above, various insulated cables, which can be divided into medium and low voltage cables (35 kV and below), high voltage cables (above 110 kV), ultra-high voltage cables (275-800 kV) and ultra-high voltage cables (1000 kV and above) according to the voltage level. In addition, they can be divided into AC cables and DC cables according to the current system. With the continuous expansion of the scale of China's power industry, data communication industry, urban rail transit industry, automobile industry, shipbuilding industry and other industries, the demand for cables will also grow rapidly, and the requirements for cables will also continue to increase.

[0003] An existing high temperature resistant and fireproof lightweight soft cable, with announcement number CN 218447323 U, includes a cable body, a cable protective layer, and an outer ring, wherein the cable body includes an inner protective layer, the inner cavity of the inner protective layer is provided with a cable conductor, the surface of the cable body is provided with a cable protective layer, and the cable protective layer includes an insulating layer, which is provided on the outer surface of the inner protective layer. The beneficial effects of the utility model are as follows: by using the insulating layer made of polytetrafluoroethylene, since polytetrafluoroethylene has excellent chemical stability, electrical insulation and good anti-aging resistance, the insulation of the cable body is effectively improved, and by using the fire-resistant and heat-insulating layer made of synthetic mica tape, since the synthetic mica tape has excellent high temperature resistance and combustion resistance, the fire-resistant and heat-insulating layer is wrapped around the surface of the insulating layer to wrap the cable body, which can effectively improve the high temperature resistance and fireproof performance of the cable body. However, since the cable does not shield the interference signal, the cable is easily interfered by the external signal, resulting in a decrease in the quality of the transmitted information, affecting the accuracy and reliability of the signal, and even interfering with the normal operation of the electrical equipment. [Utility Model Content]

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a high temperature resistant and anti-interference cable, which has good shielding and anti-interference performance while ensuring good high temperature resistance and can block external interference signals.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature resistant and anti-interference cable, comprising a fixed core, an insulating core, an insulating shielding layer, a filling layer, a conductive unit, a wrapping layer, a flame retardant layer, a metal braided layer, and a sheath layer. The fixed core is arranged at a central position, and six conductive units are arranged outside the fixed core. The conductive unit comprises an insulating core and an insulating shielding layer. The insulating core is wrapped by the insulating shielding layer. The six conductive units are twisted. A filling layer is arranged outside the conductive unit. The filling layer is wrapped with a wrapping layer. The wrapping layer is wrapped with a flame retardant layer. A metal braided layer is arranged outside the flame retardant layer. The metal braided layer is wrapped with a sheath layer.

[0006] Preferably, the fixed core is made of low carbon steel or galvanized steel.

[0007] Preferably, the insulating core is oxygen-free copper wire.

[0008] Preferably, the filling layer material is polyvinyl chloride or polypropylene.

[0009] Preferably, the wrapping layer is made of polyvinyl fluoride or fluororubber.

[0010] Preferably, the flame retardant layer is made of flame retardant low-smoke halogen-free material.

[0011] Preferably, the metal braided layer is formed by cross-weaving copper wires.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is a high temperature resistant and anti-interference cable, which is provided with a metal braided layer to transfer heat, and a flame retardant layer to prevent external combustion from burning the cable, and can withstand working conditions in a high temperature environment to ensure the normal operation of the cable in a high temperature environment;

[0014] 2. The utility model is a high temperature resistant and anti-interference cable with a metal braided layer, which can shield the influence of external electromagnetic radiation on the internal signal of the cable, provide electromagnetic shielding, and reduce the mutual influence between the wires. At the same time, an insulating shielding layer is provided outside the wire core, which can better ensure that the internal conductor is not interfered with and ensure the stability and reliability of transmission.

Brief Description of the Drawings

[0015] Figure 1 This is a schematic diagram of the structure of a high temperature resistant and anti-interference cable of the utility model;

[0016] In the figure: 1-fixed core, 2-insulated core, 3-insulating shielding layer, 4-filling layer, 5-conductive unit, 6-wrapping layer, 7-flame retardant layer, 8-metal braiding layer, 9-sheath layer. [Specific implementation method]

[0017] 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.

[0018] See also Figure 1 In an embodiment of the utility model, a high temperature resistant and anti-interference cable comprises a fixed core 1, an insulating core 2, an insulating shielding layer 3, a filling layer 4, a conductive unit 5, a wrapping layer 6, a flame retardant layer 7, a metal braided layer 8, and a sheath layer 9. The fixed core 1 is arranged at a central position, and the fixed core 1 is made of low carbon steel or galvanized steel. Six conductive units 5 are arranged outside the fixed core 1. The conductive unit 5 comprises an insulating core 2 and an insulating shielding layer 3. The insulating core 2 is wrapped by the insulating shielding layer 3. The insulating core 2 is oxygen-free copper wire. A metal foil layer is arranged outside the insulating shielding layer 3. The six conductive units 5 are twisted into a core. A filling layer 4 made of polyvinyl chloride or polypropylene is arranged outside the conductive unit 5. The filling layer 4 is wrapped with a wrapping layer 6 made of polyvinyl fluoride or fluororubber. The wrapping layer 6 is wrapped with a flame retardant layer 7 made of flame retardant, low smoke and halogen-free material. The flame retardant layer 7 is provided with a metal braided layer 8 cross-woven by copper metal wires. The metal braided layer 8 is wrapped with a protective sheath layer 9.

[0019] Working principle: When the cable is in use, the conductive unit 5 is twisted with the fixed core 1 to form a wire core with higher strength. The insulating wire core 2 in the conductive unit 5 is provided with a shielding insulation layer 3 on the outside, and a metal foil layer is provided on the outside of the insulating shielding layer 3 to provide an electromagnetic shielding effect to resist external electromagnetic interference. The conductive unit 5 is provided with a filling layer 4 made of polyvinyl chloride or polypropylene on the outside. The filling layer 4 plays the role of fixing the conductive unit 5. The filling layer 4 is wrapped by a sheath 6. The sheath 6 is made of polyvinyl fluoride or fluororubber, has good insulation performance, can effectively isolate the signal inside the cable, and reduce signal interference or loss. The sheath 4 has excellent high temperature resistance and can maintain good performance in a high temperature environment. A flame retardant layer 7 made of flame retardant, low smoke and halogen-free material is provided on the outside of the sheath 6 to prevent the cable from breaking due to excessive external heat. The metal braided layer 8 outside the flame retardant layer 7 has good protection and both anti-interference and heat conduction capabilities. The sheath layer 9 protects the internal structure to achieve the purpose of protecting the cable safety.

[0020] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A high temperature resistant and anti-interference cable, characterized in that: The invention comprises a fixed core (1), an insulating core (2), an insulating shielding layer (3), a filling layer (4), a conductive unit (5), a wrapping layer (6), a flame retardant layer (7), a metal braided layer (8), and a sheath layer (9), wherein the fixed core (1) is arranged at a central position, and six conductive units (5) are arranged outside the fixed core (1), and the conductive unit (5) comprises an insulating core (2) and an insulating shielding layer (3), and the insulating core (2) is wrapped by the insulating shielding layer (3), and the six conductive units (5) are twisted, and a filling layer (4) is arranged outside the conductive unit (5), and the filling layer (4) is wrapped with a wrapping layer (6), and the wrapping layer (6) is wrapped with a flame retardant layer (7), and the flame retardant layer (7) is provided with a metal braided layer (8), and the metal braided layer (8) is wrapped with a sheath layer (9).

2. A high temperature resistant and anti-interference cable as claimed in claim 1, characterized in that: The fixed core (1) is made of low carbon steel or galvanized steel.

3. A high temperature resistant and anti-interference cable as claimed in claim 1, characterized in that: The insulating wire core (2) is oxygen-free copper wire.

4. A high temperature resistant and anti-interference cable as claimed in claim 1, characterized in that: The filling layer (4) is made of polyvinyl chloride or polypropylene.

5. A high temperature resistant and anti-interference cable as claimed in claim 1, characterized in that: The wrapping layer (6) is made of polyvinyl fluoride or fluororubber.

6. A high temperature resistant and anti-interference cable as claimed in claim 1, characterized in that: The flame retardant layer (7) is made of flame retardant low-smoke halogen-free material.

7. A high temperature resistant and anti-interference cable as claimed in claim 1, characterized in that: The metal braided layer (8) is formed by cross-braiding copper wires.

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