Switchable air inlet system

Abstract

A switchable air inlet system comprises a motor, a pump, a one-way valve, a pressure limiting valve, a reversing valve, a throttling valve, an energy accumulator, a three-way valve, an actuator, a filter, an emergency valve and a pressure stabilizing valve. The motor drives the pump to provide a pressure medium, the pump is connected with the one-way valve, the downstream of the one-way valve is connected with the pressure limiting valve, the other end of the pressure limiting valve is connected with the two-position three-way reversing valve, the downstream of the two-position three-way reversing valve is divided into two branches, the throttle valve is arranged on one branch, and the two branches are connected with the air inlet end of the pressure stabilizing valve after being intersected.

Description

technical field [0001] The invention relates to the field of gas delivery control, in particular to a switchable air intake system. 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 prior art realizes the pilot drive through the pilot valve, and the pil...

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.

[0010] The hydraulic air intake system in the prior art has single function and poor reliability, the excess pressure cannot be recovered, and there are impurities in the medium, so it cannot be used in actuators with high purity requirements

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