Low-pressure steady flow release container valve for mixed inert gas fire-extinguishing system

Abstract

The invention relates to a low-pressure steady flow release container valve for a mixed inert gas fire-extinguishing system. The container valve comprises a valve deck, a valve element and a valve body. The container valve is characterized in that an inner cavity of the valve body comprises an upper sealed cavity body, a middle sealed cavity body and a lower sealed cavity body which are of a step shape; the valve deck is arranged on the upper portion of the valve body and is connected with the valve body in a sealing mode to form the upper sealed cavity body; the valve element is mounted in the inner cavity of the valve body in a sealed mode; gas channels are arranged in the valve body to form an upper cavity pressure boosting channel, an upper cavity pressure relief channel and a middle cavity pressure boosting channel. The low-pressure steady flow release container valve has the advantages that compared with the prior art, the adjustable container valve enables a mixed inert gas fire-extinguishing agent stored at high pressure to be released at low pressure in a steady flow mode in the fire extinguishing process, so that the problem of high pressure peak is solved thoroughly, the possibility of damage to personnel and materials in a protected area is greatly lowered, the safety is higher, the possibility of fire extinguishing failure is greatly lowered, and the fire extinguishing effect is ideal.

Description

technical field [0001] The invention belongs to valves, in particular to a low-pressure steady flow release container valve used in an inert mixed gas fire extinguishing system. Background technique [0002] Conventional inert mixed gas fire extinguishing system consists of high-pressure gas cylinders, container valves, headers, selection valves, pressure-reducing orifice plates, pipes, nozzles, etc. The fire extinguishing agent is stored at high pressure in steel cylinders (the storage pressure is 15MPa20°C). The action of the conventional container valve is to open quickly after starting. The fire extinguishing agent is released from the container valve to the header, and the pressure in the header rises instantaneously to reach the peak value of the release pressure. drop rapidly. According to the research results of the national laboratory, the peak pressure of the pipeline when the conventional inert mixed gas fire extinguishing system is released can reach more than 1...

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Problems solved by technology

Such a high release pressure brings a series of problems: low storage pressure of fire extinguishing agent; high pressure resistance level of header; high requirements for pipeline materials and high requirements for construction and installation accuracy; The calculation requirements are high; a decompression device must be installed at the inlet of the main pipe after the collector to reduce the pressure and limit the flow. At present, the decompression orifice plate is commonly used for decompression

[0004] At present, any method that relies solely on decompression and flow limitation cannot fundamentally solve the above-mentioned series of problems. Therefore, it is urgent to develop a low-pressure steady-flow release container valve with regulating performance and apply it to the inert mixed gas fire extinguishing system.

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