Fireproof plugging system for cable trench

Abstract

The invention discloses a fireproof plugging system for a cable trench. The system comprises a compressed air foam generating device which comprises a compressed air tank, a foam liquid tank, a water tank and a mixer. An air inlet and a foam outlet are formed in the foam liquid tank. A foam liquid inlet and a mixed liquid outlet are formed in the water tank. A mixed liquid inlet, an air inlet and a liquid outlet are formed in the mixer. A tee joint is arranged at an outlet of the compressed air tank, the first end of the tee joint is connected to the air inlet, the foam outlet of the foam 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 joint is connected to the air inlet. The system further comprises a main conveying pipe, the liquid outlet is communicated to the main conveying pipe, and a plurality of partition conveying pipes are connected to the main conveying pipe. Spray heads are arranged on the two sides of the firewall of the cable trench, and the partition conveying pipes are led to the spray heads. The system has the advantages of being high in plugging efficiency, small in size, large in foam output amount, easy to construct and maintain, safe to use and capable of facilitating mass application and popularization.

Description

technical field [0001] The invention relates to the field of fire-fighting and fire-extinguishing equipment, in particular to a cable trench fire-proof sealing system. Background technique [0002] The UHV converter station is the core of the UHV DC 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. There are a large number of oil-filled electrical equipment such as converter transformers in the converter station, which poses a greater risk of fire. In a typical converter fire, it is difficult to extinguish the high-temperature hot oil fire. The burning hot oil quickly enters the cable trench in the adjacent area, and because there are various types of cables arranged in the cable trench, the fire spreads further through the cable t...

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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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