Cover device for a liquid container

Abstract

The invention relates to a covering device for liquid tanks, in particular swimming pools, comprising a buoyant covering element, the covering element comprising a continuous covering layer and a fluid chamber connected to the covering layer, a pumping being provided, which is designed to convey a liquid, in particular water, and/or a gas, in particular air, into the fluid chamber. The invention also relates to an assembly of a covering device according to the invention together with a liquid tank.

What is claimed is: 
     
         1 . A cover device for liquid containers, in particular for swimming pools ( 1 ), comprising a floatable cover element ( 2 ), wherein the cover element ( 2 ) comprises a continuous cover layer ( 3 ) and a fluid chamber ( 4 ), which is connected to the cover layer ( 3 ), characterized in that a pump device ( 5 ) is provided, which is configured to convey a liquid, in particular water, and/or a gas, in particular air, into the fluid chamber ( 4 ). 
     
     
         2 . The cover device according to  claim 1 , characterized in that the cover layer ( 3 ) is substantially plane and comprises a substantially plane insulating layer ( 6 ) and a weighting layer ( 7 ), which is arranged substantially plane-parallel to the insulating layer ( 6 ), wherein the cover layer ( 3 ) preferably has an average density between 1.1 g/cm 3  and 3.0 g/cm 3 , preferably between 1.2 g/cm 3  and 2.0 g/cm 3 . 
     
     
         3 . The cover device according to  claim 1 , characterized in that the fluid chamber ( 4 ) is designed as a cavity, preferably as a substantially plane cavity with a thickness of preferably 5 cm to 20 cm. 
     
     
         4 . The cover device according to  claim 1 , characterized in that the fluid chamber ( 4 ) is made of a flexible material, such as a polyethylene film or the like, or comprises such a material, so that its volume is variable under pressure. 
     
     
         5 . The cover device according to  claim 1 , characterized in that the fluid chamber ( 4 ) is connected to the pump device ( 5 ) via a flexible tubing ( 8 ). 
     
     
         6 . The cover device according to  claim 1 , characterized in that the fluid chamber ( 4 ) has a pressure relief valve ( 9 ) to discharge water and/or air. 
     
     
         7 . The cover device according to  claim 1 , characterized in that the pump device ( 5 ) comprises a water pump ( 10 ) and an air pump ( 11 ), wherein a control device ( 12 ) is provided to control the pump device ( 5 ). 
     
     
         8 . The cover device according to  claim 1 , characterized in that slide rollers ( 13 ) are provided on the outer edges of the cover element ( 2 ) to slide the cover element ( 2 ) along the inner surface of the liquid container ( 1 ). 
     
     
         9 . The cover device according to  claim 1 , characterized in that cantilevering, preferably resilient, sealing elements ( 23 ) are provided on the outer edges of the cover element ( 2 ). 
     
     
         10 . The cover device according to  claim 1 , characterized in that a filling medium is provided to fill the fluid chamber ( 4 ) with a liquid, the filling medium being circulated in a filling medium circuit. 
     
     
         11 . The cover device according to  claim 1 , characterized in that a compensation chamber ( 33 ), which preferably surrounds the cover element ( 2 ), is arranged on the outer edges of the cover element ( 2 ) and is designed to at least partially fill a gap between a wall ( 25 ) of the liquid container and the cover element ( 2 ). 
     
     
         12 . The cover device according to  claim 1 , characterized in that the cover element ( 2 ) comprises a rotatable functional element ( 39 ), in particular a water attraction. 
     
     
         13 . The cover device according to  claim 12 , characterized in that the functional element ( 39 ) comprises a rotating means, which is configured to change the position of the functional element ( 39 ) relative to the cover element ( 2 ) in particular by about 180°. 
     
     
         14 . An arrangement of a cover device according to  claim 1  with a liquid-filled liquid container, in particular with a swimming pool ( 1 ), characterized
 in that the cover element ( 2 ) can be or is arranged floating on the liquid surface ( 14 ) in a first position, and 
 in that the cover element ( 2 ) can be or is arranged completely below the liquid surface ( 14 ) in a second position. 
 
     
     
         15 . The arrangement according to  claim 14 , characterized in that the cover element ( 2 ) is connected to the bottom ( 16 ) of the liquid container via at least one holding means ( 15 ). 
     
     
         16 . The arrangement according to  claim 15 , characterized in that the holding means ( 15 ) comprises a connecting element ( 17 ) and a winding engine ( 18 ). 
     
     
         17 . The arrangement according to  claim 1 , characterized in that, in the second position of the cover device, a first liquid area ( 19 ) and a second liquid area ( 20 ) are formed, wherein the cover element ( 2 ) forms a separation between the first liquid area ( 19 ) and the second liquid area ( 20 ), and in that a circulating pump ( 21 ) is provided, which is adapted to generate a liquid flow ( 22 ) which runs in opposite directions in the first liquid area ( 19 ) and in the second liquid area ( 20 ), the liquid flow ( 22 ) preferably running within a flow channel ( 24 ) at least in the second liquid area ( 20 ). 
     
     
         18 . The arrangement according to  claim 1 , characterized in that the holding means ( 15 ) comprises lifting spindles ( 37 ), hydraulic rams and/or scissor lifts adapted to lift the cover element ( 2 ). 
     
     
         19 . The arrangement according to  claim 1 , characterized in that at least one pressure sensor ( 41 ) is provided on the holding means ( 15 ) to measure the pressure load of the holding means ( 15 ), the pressure sensor optionally being connected to a control device, which is adapted to control the function of the pump device ( 5 ).