A high and low water level adjustment rotary pilot valve float valve

Abstract

The invention provides a high and low water level adjusting rotary guide valve floating ball valve. The floating ball valve comprises a floating ball, a support rod, a bracket, a four-way reversing valve and a floating ball main valve, wherein the support rod passes through a center shaft of the floating ball; the floating ball can slide upwards and downwards along the support rod; the upper segment of the support rod is connected with one end of an upper pull rod and one end of a lower pull rod through hinge pins; the other end of the upper pull rod is connected with a balance block; the middle segment of the upper pull rod can rotate about a fixed shaft on the bracket; the other end of the lower pull rod is connected with a valve of the four-way reversing valve; three holes are formed in the four-way reversing valve, and are connected with the lower control cavity, the water inlet and the upper control cavity of the floating ball main valve in sequence; the fourth hole is an emptying hole. The high and low water level adjusting rotary guide valve floating ball valve has the beneficial effects that the frequent starting of the floating valve main valve is avoided, and the service life of the floating ball main valve is prolonged; when the inlet water pressure is excessively low, the opening and closing of the floating valve main valve can be controlled normally, and automatic control is realized.

Description

technical field [0001] The invention belongs to the field of floating ball valves, and in particular relates to a rotary pilot valve floating ball valve for adjusting high and low water levels. Background technique [0002] The float valve adjusts the liquid supply by controlling the liquid level, and the pressure water is introduced into the lower chamber of the float valve to increase the opening force of the float valve plate. The general float valve setting is mainly to start replenishing water when the liquid level drops slightly, this control method will lead to frequent opening of the main float valve, affecting its life, and its opening force is mainly caused by the medium acting on the valve plate When the pressure is too low, the force acting on the valve plate is not enough to overcome the gravity and frictional resistance, so that the float valve cannot be opened, and its normal opening will be hindered, affecting normal use. Contents of the invention [0003]...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the invention is to avoid shortening the service life caused by the frequent opening of the main float valve; and to realize automatic control when the water inlet pressure is too low, so as to avoid abnormal startup of the float valve caused by low water pressure

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