Gas pressure regulating device

A gas pressure regulating device, comprising a housing (1), wherein the housing comprises two ends, a gas inlet (001) and a gas outlet (002) are disposed on the housing (1) respectively, a first mounting cavity (2) in communication with the gas inlet (001) is disposed at an end of the housing (1) and a level-1 depressurization mechanism (01) is disposed in the first mounting cavity (2);

• a second mounting cavity (3) in communication with the gas outlet (002) is disposed at the other end of the housing (1), wherein the second mounting cavity comprises an upper end and a lower end, the first mounting cavity (2) is in communication with the second mounting cavity (3) through a valve port (4), and a level-2 depressurization mechanism (02) is disposed in the second mounting cavity (3) to control the openness of a valve port (4);
• the level-1 depressurization mechanism (01) comprises a sliding sleeve (7), wherein the sliding sleeve comprises two ends, a gas inlet connector (5) is disposed at the gas inlet end of the housing (1), an end of the gas inlet connector (5) extends into the first mounting cavity (2) to form a mounting tubing (6), and the sliding sleeve (7) is slidably assembled between an outer wall of the mounting tubing (6) and an inner wall of the first mounting cavity (2);
• an end of the sliding sleeve (7) is slidably sleeved around the mounting tube (6), and a driving component for driving the sliding sleeve (7) to slide toward the gas outlet (002) is disposed in the first mounting cavity (2);
• the other end of the sliding sleeve (7) is provided with a gas discharge orifice (8) and a sealing gasket (9), and the gas inlet connector (5) is in communication with the first mounting cavity (2) through the gas discharge orifice (8);
• when the driving component drives the sliding sleeve (7) to slide to a set position toward the gas outlet (002), the gas discharge orifice (8) has the maximum openness;
• after a pressure inside the first mounting cavity (2) increases, the sliding sleeve (7) slides toward the gas inlet connector (5), and the gas discharge orifice (8) has a smaller openness, and when the sliding sleeve (7) moves toward the gas inlet connector (5) until the sealing gasket (9) is pressed on an end face of the gas inlet connector (5), the gas discharge orifice (8) is closed;
• wherein the level-2 depressurization mechanism (02) comprises a diaphragm assembly, a first supporting point (12), a second supporting point (13) and a second pressure regulation spring (14);
• the first supporting point (12) is disposed at a position that is on the lower end of the second mounting cavity (3) and adjacent to the valve port (4), and the second supporting point (13) is disposed at a position that is on the upper end of the second mounting cavity (3) and opposite to the first supporting point (12);
• one end of the diaphragm assembly passes through a passage between the first supporting point (12) and the second supporting point (13) to connect at a sidewall of one end of the second mounting cavity (3), and the other end of the diaphragm assembly is connected to a sidewall of the other end of the second mounting cavity (3);
• the end of the diaphragm assembly adjacent to the valve port (4) rotate around the first supporting point (12) or the second supporting point (13) to realize the openness adjustment to the valve port (4), and the second pressure regulation spring (14) is disposed between the end of the diaphragm assembly away from the valve port (4) and the upper end face of the second mounting cavity (3);
• wherein a mounting step (15) is disposed at an end of the lower end of the second mounting cavity (2) adjacent to the gas inlet (001) and the valve port (4) is disposed convexly at one end of the mounting step (15) adjacent to the gas inlet (001), and the first supporting point (12) is convexly disposed at the other end of the mounting step (15).