Patent ID: 7234600
Filing Date: 2007-06-26
Classification: B01D

Abstract:
1. A sludge scraping and collecting apparatus which comprises a guide rail laid on a bottom of a processing basin, rectangular in plan, having side walls opposing to each other in a widthwise direction of the basin, front and rear end walls perpendicular to these side walls and spaced from each other in a longitudinal direction of the basin and one end at the front of the basin, which is provided with a pit, so as to pass through a mid portion between the both side walls in a longitudinal direction which is a front and rear direction, a carriage having a main body, an advancing and retreating slider and a sludge scraper arranged at least at a front end and a rear end of the carriage main body and provided on the guide rail so that it reciprocally runs in the front and rear direction through running wheels, the carriage main body having a body portion formed into a one-piece unit through which the advancing and retreating slider can be inserted and extending uniformly in the same section in the front and rear direction, the advancing and retreating slider being supported by the body portion of the carriage main body, so that it is guided to advance and retreat in the front and rear direction and enables the front and rear sludge scrapers to switch over their upper and lower rotation positions simultaneously when it advances and retreats, the sludge scraper being switchable over between a lowered scraping and collecting position where it scrapes and collects the sludge to be deposited on left and right sides of the guide rail, toward the pit and a lifted-up return position, the sludge scraped and collected forward by the rear scraper being scraped and collected further forward by the front scraper, thereby being scraped off into the pit, there being disposed above the processing basin a driving portion which continuously rotates a driven wheel and switches over its rotation direction to a normal one or a reverse one or vice versa, a pulling and conveying means wrapped around the driven wheel having one end connected to a front end portion of the advancing and retreating slider through a direction-conversion wheel fixed in the basin and having the other end connected to the rear end of the advancing and retreating slider through another direction-conversion wheel arranged at the rear end of the guide rail after it extends from the direction-conversion wheel fixed in the basin and passes through the guide rail, the driven wheel being driven for rotating in one direction to switch over the sludge scrapers to either of upper and lower rotation positions through the pulling and conveying means and then driving the carriage for conveying the latter forwardly or rearwardly, wherein the carriage main body has front and rear end portions to which receiving boards with bearing pedestals projecting from both of the left and right sides of the carriage main body horizontally are fixed, a pair of left and right bearings being spaced apart on the respective bearing pedestals of the receiving boards detachably with its axis directed in the widthwise direction of the basin, and these bearings are provided with a rotary shaft having outwardly projecting both ends onto which scraper pipes as base shafts for the sludge scrapers are externally fitted so that they are inserted thereonto and removed therefrom so as to form a pair in the left and right direction and are fixed by attaching means.