FIELD: mechanical engineering; pumps.
SUBSTANCE: invention relates to diaphragm pumps designed for handling different fluid media. Proposed pump has housing with pumping chamber, drive chamber, reservoir, diaphragm secured in housing and arranged between pumping and drive chambers, piston in cylinder arranged in housing, connecting channel between reservoir and drive chamber, and valve in connecting channel. Cylinder forms part of drive chamber, and piston moves in cylinder in longitudinal direction. Cylinder has surface with upper part when pump is arranged so that cylinder occupies mainly horizontal position. Vent hole is found in upper part of cylinder surface through which air is forced form drive chamber back into reservoir. Moreover, displacement spring connected with diaphragm and supported by piston has rigidity providing displacement pressure overcoming pressure at suction strokes under off-standard operating conditions of pump.
EFFECT: improved reliability, efficiency and quality of operation of pump.
12 cl, 32 dwg
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