Liquid ring pump control
AssigneeEdwards Technologies Vacuum Engineering (Qingdao) Company Limited
InventorsAndries Daniel Jozef De Bock, Joeri Coeckelbergs, Xin Dai, Xibo Liu
Life of this patent
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Abstract
A system comprising: a suction line; a liquid ring pump coupled to the suction line, the liquid ring pump comprising a chamber and an impeller mounted within the chamber; a non-return valve arranged to permit fluid to flow into the chamber via the suction line and to prevent or oppose fluid flow out of the chamber to the suction line; a gas line coupled to the liquid ring pump such that a gas may flow into the liquid ring pump via the gas line, the gas line coupled to the liquid ring pump between the non-return valve and the chamber; a valve disposed on the gas line; and a controller configured to control the valve.
Claims12
A system comprising:
- a suction line;
- a liquid ring pump coupled to the suction line, the liquid ring pump comprising a chamber and an impeller mounted within the chamber;
- a non-return valve arranged to permit fluid to flow into the chamber via the suction line and to prevent or oppose fluid flow out of the chamber to the suction line;
- a gas line coupled to the liquid ring pump such that a gas is configured to flow into the liquid ring pump via the gas line, the gas line coupled to the liquid ring pump between the non-return valve and the chamber;
- a valve disposed on the gas line;
- and
- a controller configured to open the valve within a predetermined time period from activation of the liquid ring pump.
A liquid ring pump comprising:
- an inlet manifold;
- and
- a chamber fluidly connected to the inlet manifold;
- wherein:
- the inlet manifold comprises:
- an integrated non-return valve, wherein the integrated non-return valve comprises:
- an annular flange defining an opening;
- and
- an object movable between a first position and a second position, wherein the integrated non-return value is in an open position while the object is in the first position such that the object is located away from the opening so as to not block the opening, and the integrated non-return value is in a closed position while the object is in the second position such that the object abuts the annular flange so as to block the opening;
- and
- a gas inlet located between the annular flange and the chamber, and between the integrated non-return valve and the chamber when the integrated non-return valve is in the closed position.
A control method for controlling a system, the method comprising:
- activating, by a controller of the system, a liquid ring pump of the system,
- wherein the liquid ring pump comprises a chamber and an impeller mounted within the chamber;
- wherein the system comprises:
- a suction line coupled to the liquid ring pump;
- a non-return valve arranged to permit fluid to flow into the chamber via the suction line and to prevent or oppose fluid flow out of the chamber to the suction line;
- a gas line coupled to the liquid ring pump such that a gas is configured to flow into the liquid ring pump via the gas line, the gas line coupled to the liquid ring pump between the non-return valve and the chamber;
- and
- a valve disposed on the gas line;
- and
- after activating the liquid ring pump and while the non return valve is closed, within a predetermined time period from activation of the fluid ring pump, opening, by the controller, the valve such that a gas flows into the liquid ring pump via the gas line.
Dependencies are inferred from the claim text.