The fire protection maintenance method for high-voltage cable joints includes the following processes: an explosion-proof temperature and humidity sensor detects the temperature and humidity in the fire protection maintenance box, and an explosion-proof pressure sensor detects the air pressure in the fire protection maintenance box, and according to the temperature and humidity in the fire protection maintenance box, the temperature difference per unit time and the temperature difference The control signal is generated by the change and the air pressure value; the top driving mechanism and the second driving mechanism drive the top rolling louver and the second rolling louver according to the control signal to scroll from the top status to the second status, or from the second status to the top status, the The top status of is the closed status, and the second status is the open status. The invention can be applied to a humid environment, satisfy the heat dissipation requirements of the cable joint, and release energy when the cable joint is blasted, and at the same time, it is satisfied that when a fire or blast occurs in a power cable, the ignition is not extended to other cables that are laid in the same tunnel. Application requirements.

In detail, it touches on a fire protection method for high-voltage cable joints, which is suitable for fire-proof maintenance of high-voltage power cable dense places such as cable tunnels, cable trenches, and cable interlayers.

Cable fires mostly occur at cable joints. The cable center joint is the thinnest link in the safe operation of the power system. It is not uncommon to see cases of cable disconnection, short circuit, blasting and even major incidents caused by overheating of the cable joint. A 110kV cable connector in a cable tunnel is set in a closed maintenance box. The maintenance box is filled with fireproof blocking material. The cable connector heat dissipation is not good. When the connector blasting accident occurs, the energy is nowhere to be released. Adjacent cables have caused a large-scale paralysis of the city's power supply network.

The fire protection method for high-voltage cable joints can be applied to humid environments, satisfying the heat dissipation requirements of the cable joints, and releasing energy when the cable joints are blasted. At the same time, they are satisfied that the fire or blasting of a power cable does not extend to other same tunnels. The application requirements of the cable.