Flow Control Fire Valve

Abstract

The invention discloses a flow control fire-fighting valve which comprises a valve body, a valve element assembly, a valve deck, an O-shaped ring, a compression nut, a hand wheel, a gasket, a nut, a numerical display sleeve, a pointer, a cross screw and a set screw; the valve element assembly comprises a valve rod, a locking nut, a gasket, a set screw, a sealing seat, a sealing pad, a valve plate,a nut, an O-shaped ring and a stop gasket; a groove formed in the valve deck locks a boss on the valve body, and when pressure in a cavity of the valve rises, the valve deck flies out; the numericaldisplay sleeve is arranged above the valve rod, the valve deck is provided with the pointer, the valve rod moves up and down to be capable of reading an opening degree of the valve, scales on the numerical display sleeve are consistent with a screw pitch of a lead screw, a ball screw is adopted between the valve seat and the valve deck, a gap between the valve seat and the valve deck is small, andthe flow rate, corresponding to the read opening degree can be guaranteed to be more accurate; and the nut is provided with the special-shaped stop gasket, and the nut can be prevented from falling off due to vibration.

Description

technical field [0001] The invention relates to a fire valve, in particular to a flow control fire valve capable of precisely controlling the flow. Background technique [0002] Fire-fighting valve is an important accessory for the control of industrial and building pipelines. Ordinary globe valves are used in fire-fighting pipelines. It has the advantages of simple structure, reliable sealing, convenient opening and easy maintenance, so it is widely used in water supply and drainage , Building fire protection and other systems on various pipelines. The current technology of the fire valve mainly controls the flow rate by controlling the opening of the stop valve, which has problems such as difficult flow reading and inaccurate flow control; the existing technology of the fire valve also has the valve cover flying out when the pressure in the cavity rises. Problem: the fire valve of prior art also has the problems such as valve plate is easy to vibrate and come off. Conte...

AI Technical Summary

Problems solved by technology

The current technology of the fire valve mainly controls the flow rate by controlling the opening of the stop valve, which has problems such as difficult flow reading and inaccurate flow control; the existing technology of the fire valve also has the valve cover flying out when the pressure in the cavity rises. Problem; the fire valve of the prior art also has the problems that the valve plate is easy to vibrate and fall off.

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