INTEGRATING PNEUMATIC AMPLIFIER Russian patent published in 2003 - IPC

FIELD: automatic control equipment. SUBSTANCE: invention can find use in pilot pressure regulators of gas supply system in public utilities. Integrating pneumatic amplifier has chambers of static 1, controlling 25 and outlet 5 pressures and chamber 21 under membrane, body 22, setting spring 2, membranes 3, 20 and 23 intercoupled by means of rod 4 carrying pushers 6 and 18. Two bell-cranks loaded with springs 19 and 17 are installed in output pressure chamber 5 on axles 8 and 16 anchored in body 22. Arms 26 and 24 of bell-cranks are linked to pushers 6 and 18 and other arms 7 and 12 carry valves 9 and 13 interacting with seats 10 and 14 communicating with pneumatic conduits 11 and 15 with pressures P₁ and P₂ correspondingly. Chamber 21 located under membrane communicates with the aid of conduit 27 with control chamber 25. EFFECT: raised accuracy of pneumatic amplifier thanks to prevention of influence of output pressure on adjustment controlling pressure. 1 dwg