Light low-smoke halogen-free and flame-retardant cable with high and low temperature resistance for ship

Abstract

The invention discloses a light low-smoke halogen-free and flame-retardant cable with high and low temperature resistance for a ship. The cable comprises three strands of conductor wire cores, a filler, a wrapping tape, a braid layer and an outer sheath, wherein the three strands of conductor wire cores are twisted with one another and coated with the wrapping tape; the braid layer is arranged on the external surface of the wrapping tape; the outer sheath is fixedly arranged on the external surface of the braid layer; and the filler is arranged in a gap between the conductor wire cores and the wrapping tape. All used raw materials for the cable disclosed by the invention can meet normal use requirements in an environment of -40 DEG C; normal operation can be carried out at a maximum service temperature of 105 DEG C; and the problem that a common cable for the ship cannot meet the environmental requirements due to the facts that the ship has different requirements when running in different environments, a low-temperature resistant environment of the common cable is requested to be -20 DEG C and the minimum air temperature can be -34 DEG C or even lower if the ship runs in an area in the North of the Bohai sea is solved.

Description

technical field [0001] The invention relates to the technical field of cable manufacturing, in particular to a light low-smoke, halogen-free, flame-retardant cable for ships with high and low temperature resistance. Background technique [0002] With the modernization of national defense in our country, especially the rapid development of naval weapons and equipment, ship power supply and communication security measures are becoming more and more important, which are directly related to improving the combat effectiveness of ships and the safety of personnel. Secondly, with the construction of coastal defense, there is an urgent need for a large number of maneuverable, strong combat capabilities, safe and reliable naval equipment. Reducing the weight of cables and reducing the outer diameter of cables is very important for effectively reducing the weight of ships, increasing payloads, increasing speed, and enhancing combat effectiveness. Significance. Therefore, it is immine...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the domestically produced ship cables are of general-purpose structure, with relatively large outer diameter and heavy weight, which cannot meet the light and flexible requirements of ship development, and there are certain limitations in the use environment of the cable

[0004] Patent No. 102842376 A discloses a high-temperature fire-resistant insulated ship cable. This patent is a common type of fire-resistant ship cable. The refractory insulating layer formed by the strip constitutes the refractory insulating core. The insulation performance of the cable through the wrapping insulating layer is defective. The wrapping is not tight, and the covering rate of the cable is reduced after bending. It is easy to break down when the load is running; 2. The thickness of the composite tape is thick. It is necessary to ensure both fire resistance and electrical insulation performance. It is necessary to wrap more than two layers of overlapping wrapping. The thickness of the layer does not decrease in the weight and outer diameter of the cable; 3. Although this patent mentions flame retardancy in the cable, it does not mention the flame retardancy level. According to the composition of the polymer fire-resistant tape in the patent, it can be seen There is a silicon-oxygen molecular structure in the material composition. This structure is not combustible during the combustion process and has a combustion-supporting effect.

[0005] Patent No. 203150281 U announced a high-strength light-weight corrosion-resistant power cable for ships. The insulating material in this patent is polytetrafluoroethylene insulating material. This material produces highly toxic by-products such as fluorophosgene and perfluoroisobutylene under high temperature conditions. Toxic substances, the cables cannot meet the test requirements of low-smoke, halogen-free and low-toxicity characteristics for ships

[0006] Patent No. 204834102 U discloses an ultra-light halogen-free low-smoke flame-retardant ship cable. In this patent, carbon fiber is used as the braid layer. The carbon fiber braid layer has the following disadvantages: 1. Carbon fiber is relatively brittle, and it is difficult to produce in cable weaving. The process needs to go through rewinding, doubling, braiding and repeated bending of the cable during production and use, and the carbon fiber is easy to break; 2. The shielding layer of the ship cable plays the role of electrostatic shielding and conducting fault current. The performance is very poor. Generally, the volume resistivity of carbon fiber at 20°C is about 800 times that of copper wire, and more than 500 times that of aluminum alloy wire.

The shielding layer of the cable generates current during normal operation. If carbon fiber is used as the braiding layer, the loss of the braiding layer will be greatly increased. The heat accumulation will cause the current carrying capacity of the cable to decrease, and the cable will be overloaded and short-circuited.

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