High-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve

Abstract

The invention relates to a high-precision large-pressure-reduction-ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve. A two-stage pressure-reducing structure is adopted, and high-precision output of pressure is achieved. A mechanical pressure-reducing valve is adopted for the first stage, and an electrical proportional pressure-reducing valve is adopted for the second stage. A reverse unloading type main body structure is adopted for the first-stage pressure-reducing valve, the pressure force of falling-in opening pressure acting on a valve is balanced, and thus the influence of gas source pressure fluctuation is reduced; and for the problem of high upstream pressure, a metal diaphragm type structure is adopted for the first-stage pressure-reducing valve, and thus the pressure resistance is improved. A main body form of an electromagnetic proportional valve is adopted for the second-stage pressure-reducing valve, a reverse unloading type structure is adopted for a valve body, and thus interference of inlet pressure is further reduced; and meanwhile, a driving element of a proportional electromagnet is adopted, and thus the stability of output pressure is ensured on the premise of ensuring the flow.

Description

technical field [0001] The invention belongs to the field of industrial valve design, and relates to a high-precision and large pressure-reducing ratio automatic pressure-regulating gas pressure-stabilizing and pressure-reducing combined valve. Background technique [0002] At present, fuel cell gas supply systems mostly use mechanical pressure regulating valves and pneumatic pressure regulating methods. When mechanical pressure regulation changes pressure during use, the operator needs to manually adjust it, or use a pre-set adjustment method, but this method is harmful to the above. The downstream anti-interference ability is poor. Pneumatic pressure regulation often requires an additional auxiliary air source for pressure control, the system is complex, and the cost is high. At the same time, because of the addition of an additional auxiliary air source system for control, the response speed of the pressure will inevitably decrease, and the reliability of the system will ...

AI Technical Summary

Problems solved by technology

[0002] At present, the fuel cell gas supply system mostly adopts two methods: mechanical pressure regulating valve and pneumatic pressure regulating. When the pressure changes during the use of mechanical pressure regulating, the operator needs to manually adjust, or the method of predetermined adjustment is adopted. However, this method is harmful to the above Downstream anti-interference ability is poor

Pneumatic pressure regulation often requires an additional auxiliary air source for pressure control, the system is complex, and the cost is high. At the same time, because of the addition of an additional auxiliary air source system for control, the response speed of its pressure will inevitably be reduced, and the reliability of the system will also be greatly improved. reduce

Images