AUTOMATIC SAFETY EQUIPMENT OF GAS-UTILIZING GEARS Russian patent published in 2001 - IPC

FIELD: automation of heat generating processes. SUBSTANCE: invention refers to automatic equipment for safety and control over gasified heating boilers, water heaters, heating furnaces, technological installations and so forth. Automatic equipment has pneumatic-gas unit for protection and control made of operational shut-off valve and controlling shut-off valve with valves incorporating membrane drives. Flame and draft sensors are coupled to membrane drive of controlling shut-off valve and water temperature sensitive element couples output of controlling shut-off valve to membrane drive of operational shut-off valve. Body of controlling shut-off valve houses starting and interlocking valves. Pneumatic-gas unit for protection and control is fitted with additional device for safe lighting of gas-utilizing gear that includes control handle made fast to spring- loaded axle with flag mounted for turn around axle. In position START it moves axially under pressure. In this case starting valve and cam with slit accommodating flag which turns with axle open and shut interlocking valve in position START. Upper lid carries button STOP. Outlet of operational shut-off valve is coupled to gas burner and its space under membrane communicates with relief tube. EFFECT: enhanced safety while lighting ignition torch and increased productivity thanks to employment of operational shut-off valve. 3 cl, 3 dwg