In coal mines, due to the large power consumption, some cables will leak due to overwhelming load, which is very easy to cause fire, and the only way to solve this problem is to replace some high-quality flame-retardant cables. Is there any problem? What about the special flame retardant cables for coal mines?
Mine cable is the abbreviation of coal mine cable. Flame retardant cable means that under the specified test conditions, the sample cable is burned. After the fire source of the test is removed, the spread of the flame is only within the range limited by the cable, and the residual flame or A cable that can be self-extinguished within a limited time can be regarded as a flame-retardant cable. Its fundamental characteristic is: in the event of fire, it may be burnt out and cannot operate, but it can prevent the spread of fire. In layman's terms, in the event of a fire on the wire, the burning can be limited to a local area without spreading, and other various equipment can be protected to avoid greater losses. Mine flame retardant cables have flame retardant properties, have special product standards, and have mandatory coal safety certification. Mine flame retardant cables are just ordinary cables with flame retardant properties. Generally speaking, mining cables have much higher requirements than flame retardant cables.
Maintenance method of mine flame retardant cable
The fire resistance of mine flame retardant cable is incomparable with other cables, but no matter how good the flame retardant cable is, it needs maintenance. We need to know that the local bending radius of the shearer cable in the process of using the mining flame retardant cable is much smaller than the bending radius of the cable specified by the standard, and the cable is frequently subjected to a combination of two or more stresses such as excessive bending and stretching for a long time. In addition, the conductor cross section of the control core is much smaller than that of the main cable core, which will cause the breakage of the control core. So what should we do? If there is no problem, it is necessary to increase the flexibility of the shearer cable for coal mines; also increase the relative slippage of the control core; increase the strength of the conductors of the shearer cable for coal mines; change the conductor from the original bundled structure to Regular stranding can increase its bending performance, and then braid steel wire outside the conductor to increase its strength; the control core can be braided with tinned copper wire and steel wire, which is also a good method.
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