The most common failures in coal mines are: mechanical damage, break down of joints or terminals, and short-circuit of single-wire cables to ground or phases. There are roughly the following types of failures:
1. The cable is directly affected by external forces and malfunctions, such as armored cable, mobile rubber cable, etc., top-down plate is broken; the hydraulic support, scraper transporter is out of order, the off-road (derailment) vehicle is damaged, the gun is broken, and laid. The cable bends too much and damages the lead package and insulation. The cable that passes through the wind wall or damper is crushed due to the curved shape of the roadway. How to solve the common faults of coal mine cables 2. The cable is faulty due to moisture in the insulation, such as cable connectors or terminal places where there is drip and water in the eating place, the cable jacket is damaged by water so that the insulation of the power supply network is reduced, resulting in relatively Short circuit between phases.
3. The cable is faulty due to the aging of the insulation, such as the long service life of the cable, and the aging caused by excessive load for a long time.
4. Because of the frequent bending of the rubber sheath shearer cable, the control line is broken due to stretching, and a short circuit to the ground or phase.
5. Rubber cable hot or cold joints due to the poor quality of the joints to produce local heat or leakage.
The reasons for the above-mentioned failures of the cable are as follows: First, when the cables are laid, they are not operated according to the laying requirements of the cables. In operation, they are not operated or maintained in accordance with the requirements. Second, there are defects in the cable manufacturing. Therefore, in order to prevent malfunctions, On the one hand, according to the requirements of the use of different types of cable selection, and according to the (coal mine electrical test procedures) stipulate the acceptance of the cable, on the other hand strong line maintenance, prevention work.
1. The cable is directly affected by external forces and malfunctions, such as armored cable, mobile rubber cable, etc., top-down plate is broken; the hydraulic support, scraper transporter is out of order, the off-road (derailment) vehicle is damaged, the gun is broken, and laid. The cable bends too much and damages the lead package and insulation. The cable that passes through the wind wall or damper is crushed due to the curved shape of the roadway. How to solve the common faults of coal mine cables 2. The cable is faulty due to moisture in the insulation, such as cable connectors or terminal places where there is drip and water in the eating place, the cable jacket is damaged by water so that the insulation of the power supply network is reduced, resulting in relatively Short circuit between phases.
3. The cable is faulty due to the aging of the insulation, such as the long service life of the cable, and the aging caused by excessive load for a long time.
4. Because of the frequent bending of the rubber sheath shearer cable, the control line is broken due to stretching, and a short circuit to the ground or phase.
5. Rubber cable hot or cold joints due to the poor quality of the joints to produce local heat or leakage.
The reasons for the above-mentioned failures of the cable are as follows: First, when the cables are laid, they are not operated according to the laying requirements of the cables. In operation, they are not operated or maintained in accordance with the requirements. Second, there are defects in the cable manufacturing. Therefore, in order to prevent malfunctions, On the one hand, according to the requirements of the use of different types of cable selection, and according to the (coal mine electrical test procedures) stipulate the acceptance of the cable, on the other hand strong line maintenance, prevention work.
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