Rotary brush screen at an overflow sill of a rainwater relief system

Abstract

In a rotary brush screen at an overflow sill of a rainwater relief system, comprising screen bars extending transverse to the overflow sill and strippers engaging in the screen bars in a comb-like manner, the strippers are put into a curvilinearly extending, circling movement via a crank drive in accordance with the invention by means of an actuating lever in cooperation with a stationary support bearing, due to which circling movement the strippers are guided from above into the spaces between the screen bars and out again at the bottom of the overflow sill. The risk of the discharge of solids into the waters as a result of a mechanical influence on the solids during the stripping operation is reduced thereby and the operational safety is increased.

1 . A rotary brush screen at an overflow sill of a rainwater relief system, comprising:
 screen bars extending transverse to the overflow sill, into whose spaces strippers are guided, which are actuated by a crank drive via a lever mechanism motionally connected with the crank drive,   wherein the lever mechanism includes an actuating lever and a stationary support bearing, wherein the actuating lever at one end is pivotally connected with the crank drive and at another end carries the strippers and cooperates with the support bearing such that when the crank drive rotates, the strippers are put into a circling movement extending vertically and parallel to the screen bars.   
   
   
       2 . The rotary brush screen according to  claim 1 , wherein the actuating lever at the stationary support bearing is reciprocated in horizontal direction and at the same time swivelled in vertical direction, whereby the end of the actuating lever connected with the strippers is put into a curvilinearly extending, circling movement. 
   
   
       3 . The rotary brush screen according to  claim 1 , wherein a contacting contour between actuating lever and support bearing constitutes a control cam. 
   
   
       4 . The rotary brush screen according to  claim 3 , wherein that during the circling movement the strippers are guided into the spaces between the screen bars in an upper region thereof and are guided out of the spaces between the screen bars in a lower region thereof. 
   
   
       5 . The rotary brush screen according to  claim 4 , wherein detachment of the solids from the strippers is effected below an upper edge of the overflow sill. 
   
   
       6 . The rotary brush screen according to  claim 5 , wherein the strippers are again guided out of the spaces between the screen bars almost linearly. 
   
   
       7 . The rotary brush screen according to  claim 6 , wherein for collecting stripped solids a collecting pan his arranged at the overflow sill. 
   
   
       8 . The rotary brush screen according to  claim 7 , wherein distributed on a carrier element a certain number of strippers his arranged, which have a greater contour than remaining strippers. 
   
   
       9 . The rotary brush screen according to  claim 8 , wherein for aligning the strippers guide elements are provided for the strippers with the greater contour. 
   
   
       10 . The rotary brush screen according to  claim 9 , wherein the guide elements are arranged in a region where the strippers engage in the spaces between the screen bars. 
   
   
       11 . The rotary brush screen according to  claim 10 , wherein the guide elements have a guiding slot extending in a funnel-shaped manner to the spaces between the screen bars. 
   
   
       12 . A rotary brush screen at an overflow sill of a rainwater relief system, comprising:
 screen bars extending transverse to the overflow sill, into whose spaces strippers are guided, which are actuated by a crank drive via a lever mechanism motionally connected with the crank drive,   wherein in a region before, towards and at the level of the overflow sill a pivotally mounted covering hood his provided, which covers a collecting space towards the top against the screen bars and which on the side facing the screen bars can be swivelled downwards by the strippers in a linked movement with the strippers.   
   
   
       13 . The rotary brush screen according to  claim 12 , wherein the covering hood is of a floatable type and/or provided with a counter-weight. 
   
   
       14 . A system comprising:
 a rainwater relief system including an overflow sill;   a rotary brush screen positioned at the overflow sill;   screen bars extending transverse to the overflow sill, the screen bars including spaces;   strippers guided in the spaces,   a crank drive actuating the strippers via a lever mechanism motionally connected with the crank drive, the lever mechanism including an actuating lever and a stationary support bearing, wherein the actuating lever at one end is pivotally connected with the crank drive and at another end carries the strippers and cooperates with the support bearing, wherein the strippers generate a circling movement extending vertically and parallel to the screen bars via rotation of the crank drive.