Relief valve

Abstract

The invention discloses a relief valve adopting a pressurization driving piston structure, and belongs to the field of firefighting control. The relief valve consists of an ejector rod, a nut, a piston, a valve body, a main shaft, a sealing gasket, a cover nut, an output joint, an O-shaped ring., a spring, a driving joint and a handle, wherein the sealing gasket is embedded in a groove of the cover nut, and is tightened at the tail end of the main shaft; the O-shaped ring coats outer circle grooves of the main shaft and the piston; the main shaft and the piston are tightened through threads, and are mounted in holes of the valve body; the spring is between the valve body and the piston; the nut is tightened at the top of the valve body; the ejector rod is inserted in the nut; the handle is screwed at the top of the ejector rod; pressurization driving and spring returning action mechanisms are adopted; at ordinary times, the spring is ejected to the piston, so that the sealing gasket is contacted and sealed with a sealing convex ring of the valve body; in actions, a driving medium is leaded to the upper side of the piston, and the sealing gasket is opened under the effect of the piston; the driving medium is released, and the sealing gasket is closed by the effect of spring force; the wrong opening of an electromagnetic valve in the fluctuation of a firefighting water source is solved; the effect of controlling high-pressure water by low-pressure air is realized; and the relief valve is wide in application prospect in electric power, metallurgy, subways and tunnels.

Description

technical field [0001] The present invention relates to a new type of release valve that enables the fire water source to flow into the main fire control valve in one direction through pneumatic and manual control in a water spray and fine water mist fire extinguishing system. The reset action mechanism belongs to the field of fire control. Background technique [0002] The current release valve uses a solenoid valve or a manual ball valve. When the fire-fighting water source fluctuates, the solenoid valve is often pushed open by the peak pulse, causing mis-opening and spraying accidents when there is no fire, affecting normal production and causing serious water damage. Manual ball valves do not have automatic control functions and remote operation functions. In metallurgy, electric power, petrochemical, tunnels, subways and other large-scale protection areas, where fire water sources are shared, maintenance is troublesome, and misoperation and discharge often occur, causi...

AI Technical Summary

Problems solved by technology

When the fire water source fluctuates, the solenoid valve is often pushed open by the peak pulse, causing mis-opening and discharge accidents during non-fire situations, affecting normal production and causing serious water damage losses

Manual ball valves do not have automatic control functions and remote operation functions. In metallurgy, electric power, petrochemical, tunnels, subways and other large-scale protection areas, where fire water sources are shared, maintenance is troublesome, and misoperation and discharge often occur, causing undue accidents. Economic losses

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