Diaphragm pump boiler feed water system
AssigneeClayton Manufacturing Company
InventorsWilliam Clayton, George W. Mattox
Life of this patent
Estimating the term…
Abstract
A hydraulic fluid control system regulates the delivery rate of feed water to a boiler. A hydraulic actuated diaphragm pump having a plurality of diaphragm working chambers which are interconnected with check valve controlled inlets and outlets pumps the feed water to the boiler. Fluid surges or pulsations are prevented by the use of projection members on the face of the diaphragms and by a variably controlled pressure regulator responsive to the feed water pressure. The delivery rate of hydraulic fluid to the diaphragms controls the actual pumping output. A bypass line including a pressure regulating valve with pilot control and a modulating control valve controls a bypass hydraulic fluid rate which directly corresponds to the pumping output rate.
Claims28
A feed water supply system for supplying water from a source to a boiler and the like comprising;
- a source of hydraulic fluid;
- means for pressurizing at least a portion of the hydraulic fluid;
- a pumping apparatus driven by the hydraulic fluid and adapted to be connected to the source of water for supplying water to the boiler;
- means for distributing the hydraulic fluid to and from the pumping apparatus including an exhaust line for the hydraulic fluid;
- means for varying the rate of hydraulic fluid delivered to the pumping apparatus to control the pumping rate;
- and
- means for reducing any pressure surging of hydraulic fluid including means for varying the pressure of the exhausting hydraulic fluid from the pumping apparatus in the exhaust line in response to the pressure of the feed water.
A hydraulically actuated diaphragm pump comprising:
- a housing;
- at least one fluid pressure actuating chamber having a cavity wall with at least one inlet port in the housing;
- a pumping chamber in the housing;
- means for distributing a working fluid to and from the actuating chamber including a variable pressure control valve that regulates the exhausting pressure from the actuating chamber;
- means for supplying a fluid to and from the pumping chamber;
- a movable diaphragm separating the actuating chamber and the pumping chamber for pumping the fluid having at least one projecting member extending from the diaphragm surface and capable of contacting the fluid pressure actuating chamber to prevent the diaphragm from sealing against the cavity wall;
- and
- means for controlling the variable pressure control valve in response to the pressure of the fluid supplied to the pump chamber.
A feed water supply system for supplying feed water to a boiler and the like comprising:
- a source of hydraulic fluid;
- means for pressurizing at least a portion of the hydraulic fluid;
- pump means operatively connected to and driven by the hydraulic fluid for delivering feed water to the boiler;
- bypass means for varying the rate of hydraulic fluid delivered to the pump means and accordingly varying the pumping output rate of the pump means;
- and
- means for controlling the hydraulic fluid pressure delivered to and exhausting from the pump means including means for varying the pressure of the exhausting hydraulic fluid in response to the pressure of the feed water, whereby pressure surging in the hydraulic fluid is controlled.
A pumping assembly for supplying feed water to a boiler and the like when driven by a pressurized source of hydraulic fluid, comprising:
- a housing;
- at least one hydraulic fluid actuating chamber in the housing;
- at least one pumping chamber in the housing;
- a movable member separating the actuating chamber and the pump chamber for pumping the boiler water;
- means for distributing the hydraulic fluid to and from the actuating chamber including an exhaust line for the hydraulic fluid;
- means for supplying feed water to the pumping chamber including an inlet line for the feed water;
- and
- means for reducing any pressure surging of hydraulic fluid including means for varying the pressure of the exhausting hydraulic fluid from the actuating chamber in the exhausting line in response to the pressure of the feed water in the inlet line.
Dependencies are inferred from the claim text.