Pipe connection structure and vacuum-type sewage collecting appa

Details Pipe connection structure and vacuum-type sewage collecting appa Pipe connection structure and vacuum-type sewage collecting appa

1990-08-29

1992-03-31

Focarino, Margaret A.

Conveyors: fluid current

Intake to fluid current conveyor

Conveyor having plural intakes

406151, 406191, 1372361, 4321, B65G 5352

Patent

active

051002663

ABSTRACT:
A vacuum-type sewage collecting apparatus collect sewage discharged from a plurality of houses or facilities in an accumulating tank through a vacuum sewage pipe network, the inner pressure of which is negative. The vacuum sewage pipe network includes a plurality of upper stream pipes and lower stream pipes fastened to each other in a branch-like fashion. Each lower stream pipe has a sawtooth-like shape formed by alternately disposed downwardly-sloping portions extending gently downwards toward said accumulating tank, and lift portions fastened to the lowermost portion of a respective downwardly-sloping portion and extending upwardly with a steep slope. The upper stream pipe is connected to the lower stream pipe in a range in which a horizontal plane, which extends through an upper end portion of the lower stream pipe at the position in which the downwardly-sloping portion adjoins the lift portion, is higher than the center of the lower stream pipe. The upper stream pipe opens to the lower stream pipe at a position diagonally above the center of the lower stream pipe as viewed in a plane perpendicular to the pipe central axis. At least a portion of the opening is higher than the horizontal plane, and the upper stream pipe extends from the lower stream pipe diagonally upwards.

REFERENCES:
patent: 3239849 (1966-03-01), Liljendahl
patent: 3730884 (1973-05-01), Burns

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