ENERGY-INDEPENDENT GAS VALVE Russian patent published in 2010 - IPC F23N5/02 

FIELD: power industry.

SUBSTANCE: energy-independent gas valve consists of housing 1 with membrane device 2 installed on its thread and which contains membrane 3 with under-membrane cavity 4 and above-membrane cavity 5, stock 6 which is common for above-membrane cavity 5 and under-membrane cavity 4; at that, stock 6 is equipped with adjustable spring 7 with possibility of spring loading in above-membrane cavity 5, and in under-membrane cavity 4 it contains seal 8 with movable valve 9 with seat 10, which is fixed on stock 6 and shuts off seat 10 of movable valve 9; at that, under-membrane cavity 4 is connected by means of pulse tube (it is not shown in dwg) with pilot channel 11, and above-membrane cavity 5 is connected via pulse tube to gas distributing tube 12. Pneumatic automation control diagram also includes temperature sensor 13, thrust sensor 14, flame scanner 15, delivery gas sensor 16, igniting burner 17, thermal bimetal plate 18 of flame scanner 15, gas valve 19 with supply gas pipeline (it is not shown in dwg), burner 20, furnace 21; at that, under-membrane cavity 4 is connected by means of pulse tubes to sensors of thrust 14, temperature 13, flame 15 with possibility of providing gas pressure by means of delivery gas sensor 16 and jet nozzle (it is not shown in dwg) of control channel 11, and above-membrane cavity 5 is connected by means of pulse tubes to gas distributing tube 12 of burner 20.

EFFECT: simplifying the design, improving valve reliability.

2 dwg