Gas pressure driven pump having dual pump mechanisms
AssigneeSpirax-Sarco Limited
InventorsRichard H. Langdon, II, Neil J. Davies, Malcolm P. Gordge
Life of this patent
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Abstract
The present invention is directed to a gas pressure driven liquid pump having a pump body, liquid inlet, liquid outlet, a pair of pump mechanisms each including a float, and a baffle within the pump body creating two chambers within the pump body. A separate pump mechanism is configured to operate in the respective chambers. The baffle includes a void located below a low liquid level position so that a liquid seal is maintained between the two chambers. As the pump body fills with liquid condensate, a high liquid level position will trigger the respective pump mechanisms to allow motive gas into the chambers, pumping the liquid out of the pump body.
Claims18
A gas pressure driven liquid pump, said pump comprising:
- a pump body, the pump body having a liquid inlet and a liquid outlet;
- a plurality of liquid level indicators, the liquid level indicators being configured to detect a liquid level within the pump body;
- a baffle within the pump body, the baffle separating the pump body into a first side and a second side, at least one of the plurality of liquid level indicators configured to detect the liquid level within the first side and at least one of the plurality of liquid level indicators configured to detect the liquid level within the second side;
- a void defined by the baffle so as to provide liquid communication there between;
- wherein a high liquid level position within one of the first side and the second side triggers fluid communication with a motive gas source such that the liquid within the pump body will flow through the liquid outlet;
- and
- wherein the low liquid level position within one of the first side and the second side triggers fluid communication with an exhaust such that the liquid is allowed to flow into the pump body through the liquid inlet.
A gas pressure driven liquid pump, said pump comprising:
- a pump body, the pump body having a liquid inlet and a liquid outlet;
- a plurality of pump mechanisms mounted to the pump body, each pump mechanism having a gas motive port and a gas exhaust port;
- a baffle within the pump body, the baffle separating the pump body into a first side and a second side;
- wherein a predetermined high liquid level within one of the first side and the second side triggers the respective gas motive port to open, the respective gas exhaust port to close, and liquid to flow through the liquid outlet;
- wherein a predetermined low liquid level within one of the first side and the second side triggers the respective gas motive port to close and the respective gas exhaust port to open;
- wherein at least one respective pump mechanism is in fluid communication with the pump body's first side and the pump body's second side, respectively;
- a void defined in said baffle so as to provide liquid communication between said first side and said second side.
Dependencies are inferred from the claim text.