Cable Trench Fire Blocking System

Abstract

The invention discloses a cable trench fireproof sealing system, which comprises a compressed air foam generating device, which includes a compressed air tank, a foam liquid tank, a water tank, and a mixer; an air inlet and a foam outlet are arranged on the foam liquid tank; Set the foam liquid inlet and the mixed liquid outlet; set the mixed liquid inlet, air inlet, and liquid outlet on the mixer; set a tee at the outlet of the compressed air tank, and the first end of the tee is connected to the air inlet of the foam liquid tank. The foam outlet of the liquid tank is connected to the foam liquid inlet, and the mixed liquid outlet is connected to the mixed liquid inlet; the second end of the tee is connected to the air inlet of the mixer; it also includes the main delivery pipe, the liquid outlet leads to the main delivery pipe, and the main delivery pipe The pipe is connected with several partition conveying pipes; nozzles are arranged on both sides of the firewall of the cable trench, and the partition conveying pipes lead to the nozzles. The invention has the advantages of high blocking efficiency, small volume, large foam output, simple construction and maintenance, safe use, and convenient mass promotion and use.

Description

technical field [0001] The invention relates to the field of fire fighting equipment, in particular to a cable trench fire blocking system. Background technique [0002] The UHV converter station is the core of the UHVDC project to realize the mutual conversion between AC and DC. Its normal operation is the basis for the normal operation of the UHV DC transmission system. The operation reliability of the UHV converter station directly affects the safety of personnel, equipment and The power grid operates stably. The converter station has a large number of oil-filled electrical equipment such as converter transformers, which has a great fire hazard. In a typical converter fire, it is difficult to put out a high-temperature hot oil fire. The burning hot oil quickly enters the cable trench in the adjacent area, and because various types of cables are arranged in the cable trench, the fire spreads further through the cable trench, which is easy to cause The fire went out of co...

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Problems solved by technology

[0005] The high-pressure water mist fire extinguishing system uses water mist to extinguish the fire. On the one hand, water is used as a fire extinguishing agent to extinguish the oil fire of the transformer, and the fire extinguishing efficiency is low. The fine water mist will evaporate quickly in the cable trench flooded by the fire; Due to the immiscibility of water and transformer oil, the water will quickly sink to the bottom of the transformer oil pool. With the accumulation of water, once the burning transformer oil is squeezed out of the oil pool, it will instantly turn into a flowing fire, causing the ground to spread, greater fire hazard

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