Sewage pump priming system
AssigneeThe Chemithon Corporation
InventorsRichard J. Brooks, Frank O. Johnson
Life of this patent
Estimating the term…
Abstract
A sewage pump priming system including a sewage pump disposed above a sump for holding sewage to force sewage from the sump through a sewage discharge conduit, a priming chamber receiving sewage from the sewage discharge conduit to be partially filled with sewage to a level above the sewage pump and the sewage discharge conduit, a vacuum pump communicating with the priming chamber for sucking sewage into the priming chamber to prime the sewage pump and a gas relief conduit providing a passage for gas above the level of sewage in the priming chamber to the sewage discharge conduit at a position downstream of the priming chamber such that the priming chamber is utilized to prime the sewage pump and to remove gas from the sewage pump priming system.
Claims3
A system for pumping sewage from a sump containing solid, liquid and semi-liquid gas-evolving sewage, said system comprising:
- a centrifugal pump actuable after it has been primed, said centrifugal pump having a pump volute lying in a horizontal disposition, an inlet at the bottom of said volute, and a discharge outlet extending horizontally from said horizontally disposed pump volute;
- said pump being located above said sump;
- an intake conduit communicating with said inlet and extending downwardly therefrom for positioning in said sewage-containing sump;
- a discharge conduit extending downstream from said discharge outlet of the pump;
- the tops of said pump volute and said discharge outlet lying at substantially the same elevation;
- valve means on said discharge conduit for permitting fluid flow in a downstream direction only;
- a vertically disposed priming chamber communicating with said discharge conduit at a location between said centrifugal pump and said valve means;
- the top of said discharge conduit, between said discharge outlet and said priming chamber, being at least about as high as the top of said discharge outlet;
- said priming chamber being disposed above said pump volute and at least that part of said discharge conduit between said pump and said valve means;
- said system comprising means, including the capacity of said priming chamber, for accommodating in said chamber gas separating from the sewage in said system without displacing liquid from said centrifugal pump;
- and means operable to pump gas out of the upper portion of said vertically disposed priming chamber at a predetermined time to reduce the pressure therein sufficiently to draw liquid from said sump, through said centrifugal pump and into said priming chamber, to prime the pump while it is inoperative.
Dependencies are inferred from the claim text.