Hydraulic driven foam control valve

Abstract

A hydraulic driven foam control valve used for fire-fighting industry is characterized by a discoid profile; the hydraulic driven foam control valve has four interfaces; the hydraulic driven foam control valve has a diaphragm driven piston type structure; a filter is disposed at an inlet; a pressure gage is mounted on a valve cover; a pore plate and a check valve are disposed at an outlet; an O-shaped sealing ring is disposed in a valve rod groove; a spring is mounted in a valve body and a valve core groove; the valve rod is screwed in the valve core; a control diaphragm is clamped in the valve body and the valve cover; at ordinary times, the spring acts in a sealing state; the valve is opened through driving media, and fire extinguishing media enter a fire extinguishing system in one direction; the hydraulic driven foam control valve belongs to the fire-fighting field, and solves the problems of electric control dependence, poor foam liquid adhesion resistance, long opening / closing time, poor environment adaptability and anti-vibration performance for routine foam control valve; The foam control valve has wide application prospects in inflammable liquid / gas loading and unloading trestles, dangerous cargo harbors, refining devices, highway tunnels, combustion gas / fuel oil boiler rooms, diesel generator rooms and the like, and especially has unique rapid responsiveness and safe applicability for enclosed foam spraying and foam atomizing systems.

Description

technical field [0001] The invention relates to a valve used in the fire protection industry. Normally, the valve core and valve stem are closed and sealed under the action of springs and inlet pressure, and the driving medium is introduced into the inner cavity of the valve cover through hydraulic, pneumatic or manual methods to push the valve core. With the valve stem, it is opened to allow the fire extinguishing medium to flow into the fire extinguishing system in one direction. It is a special quick-opening valve for foam liquid. In the event of a fire, it can quickly supply foam liquid to realize spraying and covering fire extinguishing. It belongs to the field of fire fighting. Background technique [0002] The current foam liquid control valve often has false opening accidents when the inlet pressure fluctuates. The current valve is only a single-channel output, and its sealing ring adopts a flat seal with a large contact surface, which is easy to produce a bonding ef...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the conventional foam control valve has a large volume and is susceptible to inlet pressure fluctuations and false opening accidents; it has no filtration and anti-backflow capabilities; the sealing components have long-term slow leakage; the problem of slow start of electric ball valves and hydraulic ball valves and solenoid valve failures The hidden danger of high rate; reduce the work intensity and difficulty of foam control valve and pipe fitting assembly

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