Apparatus and process for regulating a filter plate contact pressure in filter presses

Claim 1

A process for regulating a filter plate contact pressure in a plate filter press including a hydraulic closing cylinder means, the method comprising the steps of determining, as a control variable, at least one of a compression force prevailing in a filter plate pack, the compression of an entire filter plate pack, and a compression of at least one portion of the filter plate pack exposed to a compression force ambient in the filter plate pack, and regulating a hydraulic pressure of the hydraulic closing cylinder means in dependence upon a value of a determined compressive force for maintaining a desired compression value, and wherein the step of determining includes providing at least one strain gauge means for determining a compression of at least one of the filter plate, frame, and separate deformation plate exposed to the compression pressure.

Claim 3

An apparatus for regulating a filter plate contact pressure in a plate filter press including a hydraulic closing cylinder means, the apparatus comprising a plurality of strain gauge means directly secured on respective narrow sides of at least one of a filter plate, a frame of the filter press and a deformation plate for providing an electrical output signal corresponding to a detected strain, controller means for controlling a hydraulic pressure of the hydraulic closing cylinder means, and means for one of directly transmitting the output signal and transmitting the output signal through a measured value converter to the controller means whereby the hydraulic closing cylinder means is regulated in dependence upon correction signals of the controller means.

Claim 4

An apparatus for regulating a filter plate contact pressure in a plate filter press including a hydraulic closing cylinder means, the apparatus comprising a plurality of strain gauge means directly secured on respective narrow sides of at least one of a filter plate, a frame of the filter press and a deformation plate for providing an electrical output signal corresponding to a detected strain, controller means for controlling a hydraulic pressure of the hydraulic closing cylinder means, and means for one of directly transmitting the output signal and transmitting the output signal through a measured value converter to the controller means whereby the hydraulic closing cylinder means is regulated in dependence upon correction signals of the controller means.

Claim 7

An apparatus for regulating a filter plate contact pressure in a plate filter press including a hydraulic closing cylinder means, the apparatus comprising at least one strain gauge means arranged on narrow sides of at least one of a filter plate, a frame of the filter press and a deformation plate for providing an electrical output signal corresponding to a detected strain, controller means for controlling a hydraulic pressure of the hydraulic closing cylinder means, means for one of directly transmitting the output signal and transmitting the output signal through a measured value converter to the controller means whereby the hydraulic closing cylinder means is regulated in dependence upon correction signals of the controller means, at least one measuring means adapted to be deformed upon compression of one of the filter plate, the frame, and deformation plate, said at least one measuring means being arranged on narrow sides of one of the filter plate, frame and deformation plate, the strain gauge means are attached to deformation zones of the at least one measuring means, and wherein the at least one measuring means is fashioned as one of a U-shaped and arcuate member having a ridge portion extending substantially perpendicular to a main plane of the filter plate, and wherein two base portions of the measuring means are rigidly attached to narrow sides of one of the filter plate, frame and deformation plate.

Claim 8

An apparatus for regulating a filter plate contact pressure in a plate filter press including a hydraulic closing cylinder means, the apparatus comprising at least one strain gauge means arranged on narrow sides of at least one of a filter plate, a frame of the filter press and a deformation plate for providing an electrical output signal corresponding to a detected strain, controller means for controlling a hydraulic pressure of the hydraulic closing cylinder means, means for one of directly transmitting the output signal and transmitting the output signal through a measured value converter to the controller means whereby the hydraulic closing cylinder means is regulated in dependence upon correction signals of the controller means, at least one measuring means adapted to be deformed upon compression of one of the filter plate, the frame, and deformation plate, said at least one measuring means being arranged on narrow sides of one of the filter plate, frame and deformation plate, the strain gauge means are attached to deformation zones of the at least one measuring means, and wherein the at least one measuring means is fashioned as one of a U-shaped and arcuate member having a ridge portion extending substantially perpendicular to a main plane of the filter plate, and wherein two base portions of the measuring means are rigidly attached to narrow sides of one of the filter plate, frame and deformation plate.

Claim 11

An apparatus according to one of claims 5 or 7, wherein threaded flange means are provided on the respective base portions of the measuring means.

Claim 12

An apparatus for regulating a filter plate contact pressure in a plate filter press including a hydraulic closing cylinder means, the apparatus comprising at least one strain gauge means inserted in at least one filter plate of a filter plate pack for providing an electrical output signal corresponding to a detected strain, controller means for controlling a hydraulic pressure of the hydraulic closing cylinder means, a means for one of directly transmitting the output signal and transmitting the output signal through a measured value converter to the controller means whereby the hydraulic closing cylinder means is regulated in dependence upon correction signals of the controller means.

Claim 13

An apparatus for regulating a filter plate contact pressure in a plate filter press including a hydraulic closing cylinder means, the apparatus comprising at least one strain gauge means inserted in at least one filter plate of a filter plate pack for providing an electrical output signal corresponding to a detected strain, controller means for controlling a hydraulic pressure of the hydraulic closing cylinder means, a means for one of directly transmitting the output signal and transmitting the output signal through a measured value converter to the controller means whereby the hydraulic closing cylinder means is regulated in dependence upon correction signals of the controller means.