Device For Concentration Of Material On A Water Surface And Use Of The Device

Abstract

A device for concentration of material on a water surface, wherein the device forms a front opening and is provided with buoyancy bodies and guide elements structured for guiding the material towards a collection portion, wherein the device is structured for admitting water through the device in the flow direction of the water, and wherein the device, in a portion thereof, is provided with at least two consecutive guide elements in the flow direction of the water.

1 . A device for concentration of material on a water surface, said device comprising:
 a front opening;   buoyancy bodies;   guide elements structured for guiding the material towards a collection portion;   the device being structured for admitting water through the device in a flow direction of the water; and   at least two consecutive guide elements in the flow direction of the water being provided in a portion of the device.   
     
     
         2 . The device according to  claim 1 , wherein said guide elements are fixed to a form element. 
     
     
         3 . The device according to  claim 2 , wherein said form element includes a net. 
     
     
         4 . The device according to  claim 2 , wherein said form element is of a triangular shape. 
     
     
         5 . The device according to  claim 1 , wherein said guide elements further include a buoyancy body, a skirt and a weight rope. 
     
     
         6 . The device according to  claim 1 , wherein a longitudinal direction of said guide elements form an angle of between 0° and 90° with respect to a width direction of said front opening. 
     
     
         7 . The device according to  claim 1 , wherein at least two guide elements are substantially parallel. 
     
     
         8 . The device according to  claim 1 , wherein said collection portion of said device includes a mid-portion of the device. 
     
     
         9 . The device according to  claim 1 , wherein two and two collection ends of said guide elements form an opening in a mid-portion of said device. 
     
     
         10 . The device according to  claim 1 , wherein said device is provided with spacers structured for towing behind a vessel. 
     
     
         11 . The device according to  claim 10 , wherein said spacers includes a door. 
     
     
         12 . A method of concentrating material located on or directly below a water surface, said method including the following step:
 guiding concentrated material through a device having a front opening, buoyancy bodies and guide elements structured for guiding the material towards a collection point of the device, at least two consecutive guide elements being provided in the flow direction of the water, and the water being admitted through the device.   
     
     
         13 . The method according to  claim 12 , including the step of towing the device on the water surface by means of at least one vessel. 
     
     
         14 . The method according to  claim 12 , including the step of fixing a front line of the device to banks of a river, whereby river water flows through and past the device.