Control system for a continuous process venturi accelerated pneu

Details Control system for a continuous process venturi accelerated pneu Control system for a continuous process venturi accelerated pneu

1985-08-02

1987-10-06

Nase, Jeffrey V.

Conveyors: fluid current

With means to control conveying fluid or movement of load in...

Control of conveying fluid

406 22, 406 25, 406 32, 406 27, 406120, B65G 5766

Patent

active

046979620

ABSTRACT:
An apparatus for feeding product to a pipeline via a venturi assembly has first and second tanks adapted to separately hold a quantity of product. The product is fed to the tanks from a supply hopper and enters each tank through an upper opening which accommodates a feed chute. The open end of each feed chute is closable by a flapper door which is swingable between open and closed positions. Pressurized air from a compressor is used to selectively close the flapper doors via a set of pressure valves which control the flow of air into the tanks. The product is fed from each tank to the pipeline through a Y-shaped housing and the venturi assembly. The housing has respective lower openings for each tank, also closable by swingable flapper doors. When the upper doors are closed by the air pressure, the product is forced out of the tank into the pipeline. A plurality of sensors are provided for sensing the product level in the tanks and a plurality of detectors are provided for indicating when the flapper doors are closed. A controller automatically monitors the sensors and detectors, and regulates feed of the product into the tanks and the pressure valves so as to maintain a continuous duty operation in which product is discharged from one tank as the other tank fills.

REFERENCES:
patent: 2375057 (1945-05-01), Wiegand
patent: 3738592 (1973-06-01), Smith et al.
patent: 4111492 (1978-09-01), Mraz
patent: 4269548 (1981-05-01), von Bennigsen-Mackiewiczel

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