CONTROL SYSTEM Russian patent published in 2014 - IPC E03F1/00 

FIELD: machine building.

SUBSTANCE: shutoff valve control system for vacuum drainage system comprises case accommodating first valve changed by accumulated effluents head over from first position in second one, first chamber with pressure adjustment by said first valve confined by first membrane engaged with second valve where through rarefaction or atmospheric pressure gets to shutoff valve. It comprises first connector to communicate first chamber with rarefaction source. Said connector at no head or insufficient head is shut off by first valve at its first position. At sufficient head, it is opened by first valve at its second position. Second connector to allow barometric pressure is connected with first chamber of, preferably, adjustable cross-section. Note here that first membrane, at sufficient rarefaction of said first chamber, along with second valve can change from first position communicating it with barometric pressure over to second position whereat said valve is communicated with rarefaction. First valve at its second position opening the first connector between rarefaction source and first chamber shuts off the second connector tuning to first chamber and located with barometric pressure. Note here that said first valve comprises starting membrane to shut off first connector at first valve first position and connected via mid element with starting membrane second membrane to shut off second connector at first valve second position. Mid position between starting membrane and second membrane is loaded by dynamic head. In compliance with another version, this system comprises first element and second valve engaged therewith. Position of the latter controls the operation of shut off valve that sucks off accumulated effluents by drainage system. Note here that dynamic head developed by accumulated effluents acts on the first valve to load mid space between starting head membranes that make the first assembly and first valve.

EFFECT: simplified design.

13 cl, 7 dwg