Strainer and strainer control system

摘要

A screening apparatus that includes a strainer element used for the purpose of retaining particulate while permitting the passage of a liquid through the strainer element, a support structure for the strainer element to enable rotation of the strainer element between opposed 180 degree positions, and a control member coupled with the strainer element for controlling the rotation of the strainer element. The strainer element, in both opposed positions thereof impedes any particulate while permitting the passage of a liquid. The control member is constructed so that, in a first state thereof, the rotation of the strainer element is periodically controlled to rotate the strainer element between said opposed 180 degree positions, and in a second state thereof, inhibits rotation of the strainer element.

主权项

1. A screening apparatus comprising a strainer element used for the purpose of retaining particulate while permitting the passage of a liquid through the strainer element, a support structure for the strainer element to enable rotation of the strainer element between opposed 180 degree positions, a control member coupled with the strainer element for controlling the rotation of the strainer element, said strainer element, in both opposed 180 degree positions thereof impeding any particulate while permitting the passage of a liquid, said control member constructed and arranged so that, in a first state thereof, the rotation of the strainer element is controlled to rotate the strainer element between said opposed 180 degree positions, and in a second state thereof, inhibits rotation of the strainer element; wherein the support structure includes a frame, and the strainer element includes a strainer member mounted in the frame and a shaft for supporting the strainer member relative to the frame; wherein said control member includes an electro-mechanical mechanism that, in the first state controls the rotation of the shaft between the opposed 180 degree positions, and in the second state inhibits rotation of the shaft; an upstream processing device disposed upstream of the strainer element and that generates a fault signal representative of the existence of a fault material; a first valve disposed downstream of said strainer element and having open and closed positions, said first valve being in the open position in the first state, and being in the closed position in the second state; a second valve disposed downstream of said strainer element and having closed and open positions, said second valve being in the closed position in the first state, and being in the open position in the second state; piping for interconnecting the upstream processing device, the strainer element, the first valve, the second valve; and an electronic controller responsive to said fault signal for controlling both valves including closing the first valve and opening the second valve so as to discharge the fault material to a collection location.