Pneumatic constant pressure valve

Abstract

The invention relates to a pneumatic constant pressure valve which comprises a valve body and a valve cap, wherein the valve cap is hermetically matched with the valve body; a sealing diaphragm is arranged between the valve body and the valve cap, the outer edge of the sealing diaphragm is clamped between the valve body and the valve cap, the rest part of the sealing diaphragm can move up and down in the working state, and a through hole is arranged in the middle of the sealing diaphragm; an air inlet and an air inlet standard part 1 for sealing the air inlet are arranged on the valve cap; a through hole is arranged in the middle of the valve cap; a liquid inlet on the side wall and a liquid outlet on the bottom are arranged on the valve body; a valve spool rod hermetically passes through the through hole of the valve cap and the through hole of the sealing diaphragm and extends into the valve body; a valve plug hermetically matched with the liquid outlet is arranged at the lower end of the valve spool rod; and when the sealing diaphragm moves upwards, the valve spool rod is driven by a link mechanism to move upwards to separate the valve plug from the liquid outlet. The pneumatic constant pressure valve of the invention adapts to the requirements of large scale production, can realize opening of the valve and control of the liquid flow and liquid pressure at the outlet under the working state of the valve without frequently replacing components, simultaneously has good pressure stabilizing effect, and can adapt to different liquid environments.

Description

technical field [0001] The invention relates to a valve, in particular to a pneumatic constant pressure valve used in the manufacturing process of hygienic products such as beer, beverage and medicine. Background technique [0002] As a relay control structure in the process of fluid distribution, valves are widely used in the production and manufacturing of sanitary products such as beer, beverages and medicines. Chinese patent document CN2474848Y discloses a liquid pressure stabilizing valve, which includes a housing, a water inlet and a water outlet at both ends of the housing, a sealing cover is installed on the upper end of the housing, a pressure adjusting nut is installed in the middle of the sealing cover, the sealing cover and the housing A rubber septum is installed in the liquid seal between the rubber septa, a rubber septum reinforcement plate is installed on the upper surface of the rubber septum, a connecting rod is installed on the liquid seal of the rubber se...

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is: to overcome the technical defects of the prior art that the pressure of the liquid outlet is in a fluctuating range and the effect of stabilizing the pressure is not good, thereby providing a stabilizing valve with a good effect of stabilizing the pressure;

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