Check valve with cake-shaped closing board

Abstract

The invention discloses a high-sensitivity check valve with cake-shaped closing board and good non-return effect. The check valve comprises a valve cylinder, an upper flange arranged on an upper opening of the valve cylinder, a bottom flange arranged on a bottom opening of the valve cylinder and a baffle plate connected in the valve cylinder; orthographic projection of the baffle plate is a circular ring, an outer side wall of the baffle plate is hermetically connected with the valve cylinder, an inner side wall of the baffle plate is hermetically connected with an overflow cylinder through which a lead screw runs, the upper end of the lead screw is connected with a cake-shaped closing board, orthographic projection of the cake-shaped closing board covers the orthographic projection of anupper opening of the overflow cylinder, the lower end of the lead screw is connected with a lead screw nut; middle part of the cake-shaped closing board is depressed downwards; the valve cylinder is also fixedly connected with a lead screw cylinder sleeve support arranged below the overflow cylinder, a lead screw cylinder sleeve is fixedly connected on the lead screw cylinder sleeve support, the lead screw runs through the lead screw cylinder sleeve, and the lead screw nut is arranged below the lead screw cylinder sleeve and can restrict the lead screw from falling off from the lead screw cylinder sleeve. The check valve is applicable to urgent non-return of ultralow-pressure fluid and urgent non-return of high-pressure fluid.

Description

technical field [0001] The invention relates to a fluid non-return device, in particular to a non-return valve with a pie-shaped sealing plate. Background technique [0002] At present, there are many types of check valves used to prevent fluid backflow on the market, and they are basically controlled by external forces. Only spring check valves are controlled by fluid pressure. The spring pulls the sealing plate to lock the fluid outlet. When the pressure of the fluid stretches the spring, the fluid is extruded from the periphery of the sealing plate. When the fluid pressure is less than the tightness of the spring, the sealing plate locks the fluid outlet tightly. The basic properties of the spring determine that it cannot handle small pressure. effective fluid control. Contents of the invention [0003] The purpose of the present invention is to provide a check valve with a cake-type sealing plate with good check effect and high sensitivity. [0004] To achieve the ab...

AI Technical Summary

Problems solved by technology

The spring pulls the sealing plate to lock the fluid outlet. When the pressure of the fluid stretches the spring, the fluid is extruded from the periphery of the sealing plate. When the fluid pressure is less than the tightness of the spring, the sealing plate locks the fluid outlet tightly. The basic properties of the spring determine that it cannot handle small pressure. effective fluid control

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