a filter valve

Abstract

The invention provides a strainer valve, and belongs to the technical field of machines. The strainer valve solves the problems that an existing strainer valve cannot filter off impurities completely and a filter screen is broken easily. The strainer valve comprises a valve body, wherein a cavity is formed inside the valve body; the left end and the right end of the valve body are a water inlet end and a water outlet end respectively; a filtration spring which is perpendicular to the waterflow direction and a membrane located above the filtration spring are fixed in the valve body; a stressed part is fixed at the bottom of the membrane; the two ends of the filtration spring abut against the inner wall of the stressed part and the inner wall of the valve body respectively; the membrane partitions the valve body off into a control cavity and a filtration cavity, wherein the filtration cavity is communicated with the water inlet end and the water outlet end of the valve body; a pressure guide connecting pipe communicated with the control cavity is further connected to the side portion at the upper end of the valve body. The strainer valve has the advantages that the filtration effect is good and the filtration function is not affected by changes in hydraulic pressure.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a filter valve. Background technique [0002] Filter valve, also known as filter, is a device for filtering pretreatment and an indispensable device for the pipeline series of conveying media. It is usually installed at the inlet end of water conservancy control valves, pressure reducing valves, constant water level valves and other equipment , used to eliminate impurities in the medium, prevent granular impurities from entering the channel, and protect the fittings on the equipment pipeline from wear and blockage. [0003] Filter valves are widely used in industrial production and daily life. At present, the most commonly used filter valve is a filter valve with a filter screen inside, that is, a layer of filter screen is set in the valve body of the filter valve to filter impurities. For example, a Chinese patent discloses a filter valve [Application No.: 201020300385.0; Announ...

AI Technical Summary

Problems solved by technology

First of all, the filtering area of ​​the filter is small, and the size of each mesh on the filter is the same, so there is a requirement for the size of the impurities when filtering, and the impurity particles whose volume is larger than the mesh of the filter can be filtered, and the volume is smaller than that of the filter. The impurities in the mesh cannot be filtered, so the practical value is not high

In addition, when the flow rate of the medium is fast, the impurities will cause a greater impact on the surface of the filter screen, and because the filter screen is generally made of steel wire, the filter screen is prone to deformation after a long impact and loses the filtering effect, so the filter screen should be replaced frequently will cause waste of resources

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