Series connection air-resistance pilot type ultra-high pneumatic proportional pressure-reducing valve

The utility model discloses a series connection air-resistance pilot type superhigh pressure pneumatic proportional pressure-reducing valve, which comprises a pilot valve and a main valve which are controlled by a proportion electromagnet and are installed on the same valve body. The output pressure of the main valve is controlled by the gas pressure of the pilot valve the regulating pressure is high, and the range of the output pressure is large. The pilot valve adopts a C-shaped semibridge structure, gas of an input end of the semibridge is introduced from a high-pressure gas input end of the main valve; the pilot valve controlled by the proportion electromagnet forms a dynamic gas damper at the input end; an output end of the semibridge is connected with an output end of the pressure reducing valve, and a gas damper with a fixed damping is arranged between the output end of the semibridge and the output end of the pressure reducing valve to form a fixed gas damper at the output end. the gas pressure of a pressure regulating cavity is in a dynamic balancing state under the control of the pilot valve. The utility model only uses only one proportion electromagnet, and the structure is simple; the areas of the both sides of a piston of the pressure regulating cavity are different, which has the action of proportional amplification to output pressure; at the time of the power-fail of the system, the pilot valve and the main valve can both be automatically closed under the actions of a reset spring and gas pressure.