FIELD: engines and pumps.
SUBSTANCE: mixing pump includes mixing gas chamber, inlet channels protruding into the mixing chamber for supply to mixing chamber of high pressure and low pressure gas; outlet channel for discharge of mixed gases; pneumatic actuating element located in inlet high pressure gas supply channel and containing movable piston rigidly attached to the plug the position of which in inlet channel determines the flow passage of high pressure gas to mixing chamber; control cavity of movable piston, to which the pressure determining the position of movable piston, pneumatic circuit between pressure source and control cavity is supplied. Besides, according to the invention, pneumatic circuit includes at least one bleed valve made so that leakage can be created in pneumatic circuit, which allows changing the pressure supplied to the control cavity.
EFFECT: creation of easy-to-operate gas mixing pump capable of changing the outlet gas pressure value with the specified or reference value.
17 cl, 5 dwg
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