Constant pressure regulating valve

Abstract

The invention relates to a constant pressure regulating valve. The regulating valve comprises a valve body, a valve cover, a sealing diaphragm, a valve core bar and a valve plug, wherein the valve core bar is slidably arranged in a hollow installation pipe in a sealing mode; the center part of the valve core bar passes through an installation hole of the central part of the sealing diaphragm and is hermetically and fixedly connected with the sealing diaphragm; the valve plug is fixedly arranged at one end of the valve core bar close to a liquid outlet; an outer sealed connection part and an inner sealed connection part are arranged between the valve core bar and the hollow installation pipe; a chamber is formed between the outer sealed connection part and the inner sealed connection part; a detection hole communicated with the chamber is formed on the hollow installation pipe; and the detection hole is connected with a detection device through a detection pipe. The problem that as the sealing performance of an air chamber of the valve in the prior art is deteriorated, air leakage cannot be detected in time is solved. The constant pressure regulating valve can timely detect the air leakage of the air chamber, and is particularly suitable for the production process of beer, beverages, medicaments and other hygiene products.

Description

technical field [0001] The invention relates to a valve, in particular to a constant pressure valve used in the manufacturing process of sanitary 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 septum, a co...

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Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention lies in the problem that the sealing performance of the air cavity of the valve in the prior art is reduced, which leads to the problem that the air leakage cannot be detected in time, so a constant pressure valve that can detect the air cavity leakage in time is proposed. Control valve

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