A flame retardant and fire resistant power cable resistant to spray vibration

Abstract

The invention discloses a flame-retardant and fire-resistant power cable with resistance to spraying and vibration. The inner wall of the flame-retardant inner quilt is connected with the anti-vibration assembly, and the inner side of the anti-vibration assembly is connected with the conductor. The invention provides a flame-retardant and fire-resistant power cable that is resistant to spraying and vibration. With the double-layer waterproofing of the outer waterproof tape and the inner waterproof layer, the purpose of long-term use can also be achieved in the state of long-term spraying, and the inner ring will be damaged. Moving in the radial direction of the outer ring will cause a part of the anti-vibration components to be compressed, and another part of the anti-vibration components to be stretched. The inner sleeve drives the main shaft to rotate around the center block. During the rotation of the main shaft, the springs in different positions It will be compressed or elongated, so as to absorb the power of vibration through the spring and cooperate with the rotation of the main shaft to convert the energy generated by the vibration into potential energy and centrifugal force, so as to quickly absorb the energy and complete the purpose of anti-vibration.

Description

technical field [0001] The invention relates to the field of flame-retardant and fire-resistant power cables, in particular to a flame-retardant and fire-resistant power cable that is resistant to spray vibration. Background technique [0002] Fire-resistant wire and cable refers to the cable that can maintain the normal operation of the wire and cable for a certain period of time while the external flame is still burning, maintain the integrity of the wire and cable line and maintain the normal operation of the line equipment in the event of a wire and cable fire accident. [0003] Fire-resistant wires and cables can be divided into two grades according to national standards: Grade A and Grade B. Usually expressed as NHA class as well as NHB class. Judging whether a wire and cable product is a fire-resistant wire and cable has nothing to do with whether the wire and cable product itself has self-extinguishing properties. The biggest function of flame retardant wire and ca...

AI Technical Summary

Problems solved by technology

The cables of these two structures need to be produced on special equipment, the equipment investment is large, the cable processing technology is complicated, and the insulation is easy to be affected by moisture, which is inconvenient for construction and installation.

And because the strength of the rigid fireproof cable is high, the protection strength of the wire core is relatively high. In some high-vibration regional environments, the rigid fireproof cable is likely to cause the internal wire core to detach under high-intensity vibration, resulting in high vibration. In the regional environment, the flexible fireproof cable's core is not separated under high-intensity vibration, and in the bending state of a large length, the flexible fireproof cable causes the core to break.

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