Liquid control valve

Abstract

In order to achieve an object to provide a liquid control valve of normally close valve type which has both of an outflow side pressure automatic regulating function and a water stop function, the liquid control valve has a pressure regulating piston which moves within a housing for finding a balance point between an outflow side pressure and a spring force of a pressure regulating spring placed so as to resist the outflow side pressure; a movable valve seat which is provided in the pressure regulating piston and moves together with the pressure regulating piston; and a valve body which sits on the valve seat so as to close the valve in accordance with a valve closing force generated by an inflow side pressure and a spring force of a water stop spring, and moves apart from the valve seat so as to open the valve at the time when an external valve opening force larger than the valve closing force is applied, whereby the outflow side pressure automatic regulating function is achieved in accordance with movement of the pressure regulating piston, and the water stop function is achieved in accordance with the valve close.

Description

Technical field [0001] The invention relates to a liquid control valve for controlling the flow of liquid, in particular to a liquid control valve that has both the function of automatically adjusting the pressure on the outflow side and the function of water blocking. The liquid control valve is used as, for example, a toilet flushing valve for supplying flushing water to a toilet. Background technique [0002] At present, as a liquid control valve that has both the function of automatically adjusting the pressure on the outflow side and the water barrier function, there is known a valve disclosed in the Japanese Kokai Publication No. 8-7456. However, this prior art technique is to open the valve under normal conditions. Normally open valve type valve device that closes the valve as required. Therefore, the problem is that it cannot be directly used as a normally closed toilet flushing valve which is the opposite of the aforementioned normally open valve, which closes the valve ...

AI Technical Summary

Problems solved by technology

[0002] At present, as a liquid control valve with both the function of automatically adjusting the pressure on the outflow side and the function of blocking water, the valve disclosed in Japanese Patent Publication No. 8-7456 is known. However, this prior art is to open the valve under normal conditions, Normally open valve unit that closes the valve on demand

Therefore, the problem is that it cannot be used directly as a normally closed toilet flushing valve that normally closes the valve and opens as needed, contrary to the normally open valve described above.

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