The fire protection maintenance methods of high-voltage cable joints include the following processes: the explosion-proof temperature humidity sensor detects the temperature humidity in the fire protection maintenance box, the explosion-proof pressure sensor detects the air pressure in the fire protection maintenance box, changes according to the temperature humidity in the fire protection maintenance box, the temperature difference per unit time the temperature difference 1. The air pressure value generates a control signal; the top drive mechanism the second drive mechanism separate the top scrolling shutter the second scrolling shutter according to the control signal the top status to the second status, the second status to the top status. The top status is the closed status, the second status is the open status. The invention can be applied to a humid environment, satisfying the heat dissipation requirements of the cable joint, releasing energy when the cable joint explodes, at the same time satisfying the fire blast of a power cable in the same route, which will be ignited to other cables laid in the same tunnel. Application requirements.

It touches on a fire protection method for high-voltage cable joints in detail, which is suitable for fire protection in high-voltage power cable intensive places such as cable tunnels, cable trenches cable interlayers.

Cable fires often occur at cable joints. The center connector of the cable is the thinnest link in the safe operation of the power system. There are many cases of cable disconnection, short circuit, blasting even major incidents caused by overheating of the cable connector. The llOkV cable connector in a cable tunnel is set in a closed maintenance box. The maintenance box is filled with fire blocking material. The heat dissipation of the cable connector is unfavorable. The energy of the connector explosion is nowhere to be released. The connector box bursts instantly, causing a fire burning. Adjacent cables lead to large-scale paralysis of the city's power supply network.

The fire protection maintenance method of high-voltage cable joints can be applied to humid environments, satisfying the heat dissipation requirements of the cable joints, releasing energy when the cable joints explode, at the same time satisfying the fire blast of the power cables all the way. Requirements for the use of cables.