A backup pressure type heptafluoropropane fire extinguishing system

Abstract

The invention provides a spare pressure type heptafluoropropane fire extinguishing system. The spare pressure type heptafluoropropane fire extinguishing system comprises a power gas cylinder set, a driving gas cylinder set, a heptafluoropropane storage cylinder, a fire extinguishing agent container valve, a pressure reducing device, a power gas container valve, a driving gas container valve, a first starter, a second starter and an electromagnetic starter. When a fire breaks out, the electromagnetic starter and the gas driving cylinder set act, released gas enters the first starter and the third starter respectively, the power gas container valve and a selection valve are opened, and gas released from the power gas cylinder set constantly enters the heptafluoropropane storage cylinder after being subjected to pressure reduction by virtue of the pressure reducing device and delayed; and when pressure of a fire extinguishing agent in the heptafluoropropane storage cylinder reaches a certain pressure, the fire extinguishing agent enters the second starter by virtue of a connecting pipe, the second starter acts to open the fire extinguishing agent container valve, and the fire extinguishing agent in the heptafluoropropane storage cylinder extinguishes a fire in a specified protection zone by virtue of a pipe network. By applying the spare pressure type heptafluoropropane fire extinguishing system provided by the invention, safety of the fire extinguishing system can be guaranteed, and constant pressure stable output of heptafluoropropane also can be guaranteed.

Description

technical field [0001] The invention belongs to the field of fire fighting and fire extinguishing, and in particular relates to a backup pressure type heptafluoropropane fire extinguishing system. Background technique [0002] In the existing gas fire extinguishing system, the backup pressure heptafluoropropane fire extinguishing system installs heptafluoropropane and high-pressure nitrogen in different storage bottles respectively. When the control system is started, high-pressure nitrogen is first quickly injected into the storage bottle containing heptafluoropropane as a driving force. The gas pushes the heptafluoropropane into the fire network pipe and finally sprays on the fire sprinkler to extinguish the fire. However, in the existing system, the following defects may occur: [0003] (1) After the high-pressure nitrogen storage bottle is activated but the heptafluoropropane storage bottle is not activated, with the injection of high-pressure nitrogen (15MPa), the pres...

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Problems solved by technology

[0003] (1) After the high-pressure nitrogen storage bottle is activated but the heptafluoropropane storage bottle is not activated, with the injection of high-pressure nitrogen (15MPa), the pressure in the heptafluoropropane storage bottle far exceeds the safety pressure (5.6MPa) in the storage bottle itself and Explosion occurs, resulting in safety accidents;

[0004] (2) In the combined distribution system, in order to meet the fire extinguishing requirements of all the protected areas allocated, it is necessary to reduce the filling rate of the fire extinguishing agent, increase the number of steel cylinders, and make management and maintenance troublesome;

[0005] (3) Once the system is started, all the fire extinguishing agent and high-pressure nitrogen must be released, resulting in unnecessary waste of resources, and the pressure in the high-pressure nitrogen storage bottle will gradually decrease during the fire extinguishing process, and the initial rapid injection of high-pressure nitrogen will affect the downstream connected equipment. Bringing overpressure shock, the subsequent high-pressure nitrogen gradually limits the delivery distance of the fire extinguishing agent;

[0006] (4) There will be some leakage in the known heptafluoropropane storage bottles. Long-term storage may cause the fire extinguishing dose to fail to meet the fire extinguishing requirements. Once a fire occurs, how can the fire be effectively extinguished if there is leakage during the storage process;

[0007] (5) Even if the pressure of the fire extinguishing agent is sufficient in the delivery pipeline, due to the large area of ​​the protection zone, the area that one nozzle is responsible for is relatively limited, so the number of nozzles required to be installed is large, causing problems of poor cost and fire extinguishing effect

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