Balanced aerodynamic force type breather valve and working method

Abstract

The invention discloses a balance aerodynamic force type breather valve and a working method, which are suitable for pressure control of petroleum and chemical containers. Comprising a tubular structure valve body with upper and lower flanges, the top of the valve body is provided with an exhalation valve, the top of the exhalation valve is provided with an exhalation valve bearing valve cover, the bottom of the valve body is provided with an air inlet hole communicated with an external air source for use, and one side of the valve body is provided with a suction valve; wherein the bottom of the exhalation valve is connected with the valve body, an air leakage channel communicated with the outside is arranged in the exhalation valve, and a spring compensation cone valve for controlling opening and closing of the air leakage channel is arranged on the air leakage channel; an upper valve cavity and a lower valve cavity which are separated from each other are arranged in the suction valve, a suction valve bearing valve cover is arranged at the top of the upper valve cavity, a suction valve bearing valve cover ventilation opening is formed in the suction valve bearing valve cover, the lower valve cavity is communicated with the valve body, and a spring compensation cone valve for controlling the lower valve cavity to be opened and closed to communicate the upper valve cavity with the outside is arranged on the lower valve cavity. The breather valve is simple in structure and convenient to use, and effectively solves the problems that the valve disc vibrates left and right, the opening and closing pressure difference is large and the breather valve jumps frequently in the opening and closing process of the breather valve.

Description

technical field [0001] The invention relates to a breathing valve and a working method, in particular to a balanced pneumatic breathing valve and a working method suitable for pressure control of petroleum and chemical containers, and belongs to the field of breathing valve structural devices. Background technique [0002] The breathing valve is an indispensable safety device installed on the transport storage tank and used to fix the storage tank. It will open automatically when there is overpressure or vacuum in the normal pressure and low pressure storage tank to prevent the phenomenon of overpressure drum tank and low pressure tank. . At the same time, it can reduce the leakage of volatile materials in the storage tank, reduce environmental pollution, and play a certain role in promoting safety and environmental protection. Most of the breathing valves currently in use are gravity breathing valves, and the opening pressure of the breathing valve is determined by the wei...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, a balanced pneumatic breathing valve with simple structure and high control precision and its working method are provided, which effectively solves the left and right vibration of the valve disc and the pressure difference between opening and closing when the breathing valve is opened and closed. Problems with large and frequent jumps

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