Heat and cold resistant flexible cable

Abstract

The invention discloses a heat-resistant and cold-resistant flexible cable. For a single-core structure, it includes a conductor and an insulating layer covering the periphery of the conductor. The insulating layer is a silica gel insulating layer, and there is a heat insulating layer between the conductor and the insulating layer, and the heat insulating layer is covered with polyimide paper. For the multi-core structure, it includes a plurality of cable cores and sheaths covering the periphery of the multiple cable cores. The plurality of cable cores are twisted into a spiral shape, and there are fillers in the gaps between the cable cores. The cable core is the aforementioned Heat and cold resistant flexible single core cable. It has good flexibility, can withstand both high temperature and low temperature, and can meet the requirements of mobile appliances in various temperature environments.

Description

technical field [0001] The invention relates to cables, in particular to a heat-resistant and cold-resistant flexible cable, which can be widely used in mobile appliances in high-temperature industries such as glass, papermaking, and metallurgy, and is also suitable for mobile appliances in high-cold environments. Background technique [0002] High temperature furnace is an important equipment in metallurgical industry and glass industry. The working temperature of high temperature furnace is 1000 ℃ or even 1600 ℃, and the radiation temperature around it can reach about 300 ℃. It is a huge test for the electrical equipment around the furnace, especially for electrical appliances. Connected wires and cables, because these cables cannot all be in a closed state, the cables are exposed to heat radiation at any time, causing plastic aging and melting, so that the cables lose their original electrical and mechanical properties in a short period of time, causing power outages, etc....

AI Technical Summary

Problems solved by technology

[0002] High temperature furnace is an important equipment in metallurgical industry and glass industry. The working temperature of high temperature furnace is 1000 ℃ or even 1600 ℃, and the radiation temperature around it can reach about 300 ℃. It is a huge test for the electrical equipment around the furnace, especially for electrical appliances. Connected wires and cables, because these cables cannot all be in a closed state, the cables are exposed to heat radiation at any time, causing plastic aging and melting, so that the cables lose their original electrical and mechanical properties in a short period of time, causing power outages, etc. In addition, when the electric door of the furnace is opened, when the mobile loading vehicle performs continuous loading and transportation tasks, the loading vehicle and its electrical connection lines are in the highest heat radiation environment, and the highest instantaneous radiation temperature can reach more than 400°C. The connection relies on special cables, which move with the movement of the loading vehicle and are in a state of bending and torsion at any time in a high-temperature environment. Therefore, the flexibility of the cables is extremely high. If the flexibility of the cables does not meet the requirements, plastic or rubber The formed cable sheath may break, causing electrical failures in the mobile loader

According to the actual investigation of the working environment of a high-temperature furnace in a large-scale heavy industry forging workshop, the temperature around the furnace is between 260 and 305°C. The connecting cable is in a heat radiation state of around 420°C and twists with the movement of the loading vehicle. The cables currently on the market generally work at around 200°C. Not only the temperature resistance level is low, but also the flexibility is not good. Unable to meet the requirements of the above use environment

[0003] On the other hand, for mobile electrical appliances used in high-cold environments, such as cranes used in construction sites in plateau or high mountain areas in winter, the cables often suffer accidents due to insulation cracking and wire brittleness due to low temperature.

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