Rotary valve multi-tank indirect liquid level measurement system and method for wastewater tanks in a recreational vehicle

摘要

A multi-tank indirect liquid level measurement device and method for wastewater tanks in a recreational vehicle may be implemented using a sealable reservoir that holds pressurized air, a manual piston pump that supplies and/or pressurizes the air in the reservoir, a rotary valve that incorporates a selection disk with an axial passage that is rotationally coupled to a connection disk that has a plurality of pipes, each of which connect on their other end to the wastewater tanks to be gaged. A bourdon tube pressure gage displays the pressure difference between the sealable reservoir and atmospheric pressure, which is an indirect reading of the height of the wastewater in the tank being gaged.

主权项

1. An apparatus for indicating the depth of liquid in a plurality of recreational vehicle wastewater tanks comprising:
a sealable reservoir for holding pressurized air; a manual piston pump that pressurizes the air in the reservoir; a cylindrical tube pneumatically coupled to the sealable reservoir; a cylindrical connection disk that snugly fits inside the cylindrical tube and is fixedly attached to the cylindrical tube, the connection disk comprising:
a plurality of axial through holes located at a fixed radius from the connection disk central axis; anda connection element in one end of each axial through hole wherein each connection element provides a connection to a pipe that communicates with liquid in the bottom of one of the recreational vehicle wastewater tanks to be gaged; a cylindrical selection disk that snugly fits inside the cylindrical tube wherein:
the selection disk is axially aligned and adjacent to the connection disk on the opposite side of the connection disk from the connection elements;the selection disk is located between the connection disk and the reservoir;the selection disk comprises an axial passage that is located at the fixed radius from the common central axis of the selection disk and connection disk; andthe selection disk is rotatable in the cylindrical tube to provide selective and exclusive transmission of pressurized air from the reservoir to the recreational vehicle wastewater tanks; and a bourdon tube pressure gage that senses the pressure difference between the pressurized air and atmospheric pressure and displays the pressure difference to indicate the depth of the liquid in one of the recreational vehicle wastewater tanks.