Installation and operation and maintenance method of pressure-stabilizing pilot drive valve

Abstract

The invention discloses an installation and operation and maintenance method of a pressure-stabilizing pilot drive valve. The pressure-stabilizing pilot drive valve comprises a hexagonal upper valve body, an upper pressing plate, a diaphragm, a lower pressing plate, a stand column, a first through hole, a valve plate, a valve rod, a lower guide frame, a second through hole, an upper guide frame, alower valve body, a lower spring and an air cylinder, wherein the air cylinder comprises a left cavity, a middle cavity, a right cavity, an air inlet, a pressure regulating port, a pressure relief port, a right port, a left piston, an upper spring, a right piston, a limiting column, a hemisphere cover, a pivot and a connecting plate, and a containing groove is formed in the connecting plate. Theinstallation and operation and maintenance method comprises a mounting method, a testing method, and an operation method, wherein the testing method comprises the following steps that the pressure ofthe air inlet end of the valve is improved, the pressure above the diaphragm is improved, the valve plate is opened, the pressure of the air outlet end of the valve is tested, when the pressure of theair outlet end meets a preset value, after the pressure of the air inlet end is maintained for thirty minutes, the integrity of the diaphragm is detected, so that the pressure-bearing capability of the diaphragm under extreme pressure is tested.

Description

technical field [0001] The invention relates to the field of gas transportation control, in particular to a method for installation, operation and maintenance of a voltage stabilizing pilot drive valve. Background technique [0002] With the development of science and technology and the development of the economy, the requirements for fluid transportation are getting higher and higher. Hydraulic and pneumatic pipelines are widely used in industry, life and other fields. With the development of refinement, the requirements for pressure control and automation are also increasing. Higher and higher. Valves are important components in the field of pressure control, including pilot valves, pressure limiting valves, etc. Pressure limiting valves are also called safety valves. Drive components include electromagnetic drives, motor drives, manual drives, and automated drives. [0003] In actual use, there are the following problems: [0004] The pressure stabilizing valve in the ...

AI Technical Summary

Problems solved by technology

[0004] The pressure stabilizing valve in the prior art realizes the pilot drive through the pilot valve, and the pilot part is usually a cylinder. However, the cylinder in the prior art is often a moving part such as a piston, or two pistons are connected by a valve stem, and its function is single. Can realize "one in one out"

[0005] The existing technology also has a solution to "one in and one out", that is, it is set as a multi-way valve. However, the multi-way valve has three disadvantages: one is that the structure is complex and often requires multiple driving structures; the other is that although the driving source is reduced, However, in order to achieve multi-way, it is necessary to design a very complicated valve stem, with unevenness on the valve stem to match multiple valve ports; third, there is a lack of linkage effect between these channels

[0007] The pressure relief method in the prior art often uses a spring-loaded pressure relief valve. However, due to the structural characteristics of the cylinder itself, it is impossible to match the spring-loaded pressure relief valve to the structure of the cylinder; it must not only overcome structural problems, but also consider The air pressure inside the cylinder fluctuates, so it is technically very difficult to achieve

[0008] The cylinders in the prior art are often only connected with the intake end and the upper chamber, without considering the pressure of the outlet end, or setting sensors to realize the focus on the outlet end, thereby increasing the manufacturing cost

[0009] The pressure stabilizing valve in the prior art uses the upper chamber drive or auxiliary drive, but there are big problems in its guidance. The cooperation between the diaphragm and the valve stem will cause lateral displacement, and the long-term low matching degree will affect the service life after use.

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