1results about How to "Fire extinguishing achieved" patented technology

The application discloses an automatic fire extinguishing system and method for a cable trench of an underground pipe gallery, and belongs to the technical field of cable trench fire extinguishing. The automatic fire extinguishing system comprises a temperature detection line which is laid in the cable trench of the underground pipe gallery and is used for sensing temperature and serving as a trigger heat source; a heat-sensitive line which has a burning point temperature lower than a critical temperature of a fire ignition point of a cable and is arranged in a heat radiation range of the temperature detection line and is used for transmitting a flame to form a first trigger signal after being ignited by the temperature detection line; and an automatic fire extinguishing module which is hung and laid on a side wall of the cable trench of the underground pipe gallery and comprises a shell, a fire extinguishing agent, a gas injection pipeline, and a gas injection hole which is arranged on the gas injection pipeline; the fire extinguishing agent is provided with a contact point which is connected with the heat-sensitive line; and a chain starting mechanism is arranged between the automatic fire extinguishing modules and is used for triggering adjacent automatic fire extinguishing modules to start. The application prevents fire in the narrow space of the underground pipe gallery, performs fire extinguishing isolation in advance, and prevents the occurrence of a cable trench fire.