A split-chamber type flow-regulating and pressure-regulating valve with full-on and full-off switching

Abstract

The utility model discloses a kind of full open full close switching's sub-cavity formula flow regulating pressure regulating valve, including main valve, electric ball valve A, electric ball valve B and control unit;Main valve includes valve stem, valve core, diaphragm and valve shell, valve stem, valve core and diaphragm are set in valve shell, valve stem connects diaphragm and valve core;Valve shell is equipped with water inlet cavity, water outlet cavity and pressure chamber, pressure chamber is equipped in the top of water inlet cavity and water outlet cavity, diaphragm is equipped in pressure chamber, diaphragm divides pressure chamber into upper chamber and lower chamber, valve core is equipped at the intercommunication of water inlet cavity and water outlet cavity electric ball valve B is connected water outlet cavity, lower chamber and external atmosphere respectively;Control unit is connected with electric ball valve A and electric ball valve B communication respectively.By the sub-cavity formula structure design of pressure chamber, the intercommunication control of two electric ball valves to upper chamber, lower chamber and atmosphere, can dynamically eliminate residual pressure inside pressure chamber, ensure that flow regulating pressure regulating valve realizes complete opening or closing under the import pressure low or high flow demand working condition.

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