SHARED VALVE UNIT WITH AUTOMATIC SWITCH OF GAS SOURCES ACCORDING TO THE INPUT PRESSURES OF DIFFERENT GAS SOURCES WITH NO NEED TO CHANGE THE NOZZLE

摘要

A shared valve unit with automatic switch of gas sources according to the input pressures of different gas sources with no need to change the nozzle includes a housing, a differential pressure component and two nozzles, said housing configured with a chamber and a gas flow passage, a gas inlet passage, communicated with the inlet end of said chamber and gas flow passage, a gas outlet passage, communicated with the outlet end of said chamber and gas flow passage, said differential pressure component configured inside said chamber, including a differential pressure diaphragm and a controlling device configured on said differential pressure diaphragm, with its one end configured with a sealing block to seal the gas outlet passage, an elastic component, abutting between one end of said housing and said differential pressure diaphragm, said two nozzles having different diameters, respectively preinstalled inside said gas flow passage and on the outlet end.

主权项

1. A shared valve unit with automatic switch of gas sources according to the input pressures of different gas sources with no need to change the nozzle, comprising:
a housing, including a base and an upper cap covering the base, with a chamber formed between said base and upper cap, said base extended with a gas flow passage, a gas inlet passage, communicated with the inlet end of said chamber and gas flow passage, a gas outlet passage, communicated with the outlet end of said chamber and gas flow passage; a differential pressure component, configured inside said chamber, including a differential pressure diaphragm, configured on one end of said upper cap corresponding to the base and corresponding to the gas inlet and outlet passages, a controlling device, configured on said differential pressure diaphragm and stretching into the gas outlet passage, with its one end provided with a sealing block to seal the gas outlet passage, an elastic component, abutting between said upper cap and differential pressure diaphragm, such that the sealing block does not seal the gas outlet passage when the pressure of input gas upon the differential pressure diaphragm is not larger than the elastic force of the elastic component; said gas outlet passage can be communicated with the gas flow passage; and a first nozzle and a second nozzle, respectively configured inside said gas flow passage and on the outlet end of the gas flow passage, the diameter of said first nozzle being smaller than the second nozzle.