A multi-stage response automatic fire extinguishing device and its use method

Abstract

The invention relates to a multi-stage response automatic fire extinguishing device for railway tunnel equipment caverns and its use method. A double-head straight-through joint and an ordinary joint are installed on the second bottle head valve, and one end of the inner pipe is sealed and passed through the outer pipe. One end is inserted into the outer tube, the other end of the inner tube is connected to one end of the double-ended straight-through joint through a common joint, one end of the outer tube is connected to a one-way valve with a pressure gauge, and the other end is connected to a common joint. One end is connected to the connecting ball valve, and the other end is connected to the other end of the double-head straight-through joint; the first pressure tank is filled with ultra-fine dry powder fire extinguishing agent; the second pressure tank is filled with clean fire extinguishing agent. The invention can automatically detect at fixed points and respond in grades, spray specific types and quantities of fire extinguishing agent, and solve the technical problem of automatic fire fighting in caverns of railway tunnel equipment; The fire extinguishing pipe can freely pass through the electrical facilities of the railway tunnel equipment cavern, and is easy to install.

Description

technical field [0001] The invention relates to the technical field of fire extinguishing in railway tunnels, in particular to a multi-stage response automatic fire extinguishing device and a use method for railway tunnel equipment caverns. Background technique [0002] During the "Twelfth Five-Year Plan" period, my country's railway industry has developed rapidly. According to statistics, nearly 7,600 railway tunnels have been built in my country, with a total length of about 4,300km. As railway tunnels become longer and larger, the number of chambers for ventilation, electricity, electric traction, communication, and signaling equipment is increasing. These equipment caverns are important facilities to ensure the normal operation of the tunnel. At the same time, they have a high risk of fire and are high-fire areas in railway tunnels. In addition, the equipment cavern is usually unattended. Once a fire occurs, it will cause damage to equipment such as power supply and com...

AI Technical Summary

Problems solved by technology

[0004] (1) Once the existing direct fire detection tube fire extinguishing device is started, regardless of the actual working conditions of the protected object and the size of the fire, the internal fire extinguishing agent will be fully sprayed and released, and it is impossible to automatically extinguish fires in different grades according to different fire scales

This will lead to a large amount of waste and ineffective use of fire extinguishing agents after spraying all the fire extinguishing agents at one time when a separate partition of the electrical equipment in the equipment cavern is on fire or the fire is small. After the fire extinguishing agent is sprayed, the fire extinguishing device will lose its effect. Once the fire re-ignites or other protected areas catch fire again, it will cause huge losses;

[0005] (2) For railway tunnel equipment caverns, the interior of its electrical equipment is generally divided into multiple independent or partially connected compartments, and the fire site may be located in one or more closed compartments, or in an exposed compartment. On the cables outside the electrical equipment, this makes the engineering design of the existing direct fire detection tube fire extinguishing device more difficult

When a single existing direct fire detection tube fire extinguishing device is used, it will inevitably lead to a large amount of redundant design and waste of fire extinguishing agents, which will cause secondary damage to the protection facilities, and cannot take into account the complex fire scene with multiple fire points at the same time ; When multiple fire detection tube type fire extinguishing devices are used, or when a fire detection tube type fire extinguishing device is used for each independent compartment, it will lead to complex engineering design, inconvenient installation, high cost, and it is difficult to ensure fire extinguishing Effect;

[0006] (3) Existing fire extinguishing devices with direct fire detection tubes mainly use carbon dioxide and heptafluoropropane fire extinguishing agents, both of which have problems such as low fire extinguishing efficiency.

[0007] (4) The fire extinguishing efficiency of ultra-fine dry powder fire extinguishing agent is much higher than that of heptafluoropropane, carbon dioxide and other fire extinguishing agents, and it has both full flooding and local fire extinguishing performance, but because of the solid powder residue after fire extinguishing, it is subject to many restrictions in practical application

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