Piston type fire extinguishing device and pressure relief method thereof

Abstract

The invention discloses a piston type fire extinguishing device and a pressure relief method thereof. The fire extinguishing device comprises a storage tank; the storage tank is provided with a firstcavity; the first cavity is slidably provided with a piston inside; the piston divides the first cavity into a fire extinguishing agent cavity and a drive air chamber; and in the state that the pistonmoves to a preset position in a direction that a space of the fire extinguishing agent cavity becomes smaller, the drive air chamber communicates with the fire extinguishing agent cavity, so that drive air in the drive air chamber enters the fire extinguishing agent cavity and is exhausted from a fire extinguishing agent outlet of the fire extinguishing agent cavity. According to the fire extinguishing device, the drive air in the drive air chamber can finally enter and be exhausted from the fire extinguishing agent chamber, so that the fire extinguishing agent is avoided from remaining in afire extinguishing agent conveying pipeline, the utilization rate of the fire extinguishing agent is increased, the drive air chamber can be timely released, the potential safety hazard of explosion as the drive air chamber is kept in a higher pressure state after fire extinguishing is avoided, and use of the fire extinguishing device is safer and more reliable.

Description

technical field [0001] The invention relates to a fire extinguishing device, in particular to a piston type fire extinguishing device and a pressure relief method thereof. Background technique [0002] The traditional non-storage type fire extinguishing device uses the driving gas to push the fire extinguishing agent to move, so that the fire extinguishing agent is output. With the output of the fire extinguishing agent, the driving gas will gradually lose, resulting in insufficient driving pressure in the later stage and unable to discharge the fire extinguishing agent in the storage tank. All the fire extinguishing agents were pushed out, resulting in the problem of fire extinguishing agent residue in the storage tank. For this reason, a piston-type fire extinguishing device has appeared in the prior art. A piston is slidably arranged in the storage tank. The piston slides to promote the output of the fire extinguishing agent. During the whole process, the pressure of the...

AI Technical Summary

Problems solved by technology

Although this piston type fire extinguishing device solves the problem of fire extinguishing agent residue in the storage tank, new problems have also occurred: there is the problem of fire extinguishing agent residue in the fire extinguishing agent delivery pipeline connected with the storage tank; although the driving air chamber is generally provided with The safety pressure relief port ensures that the driving pressure will not exceed the rated pressure, but after the device is started, the pressure of the driving gas in the driving air chamber is still very high, and there is a potential safety hazard of explosion due to environmental influence or external pressure (such as impact)

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