Floor water tank filtering device for three-in-one sewers

Abstract

A floor water tank filtering device for three-in-one sewers comprises a tank body having a receiving space at an interior thereof; a bottom of the tank body being formed with a drain hole; a filtering grid being installed at the drain hole; a top of the tank body being combined with a cover plate; the filtering grid being combined at an upper side of the drain hole of the tank body; a top of the filtering grid being provided as a supporting point of the cover; and the cover being formed by a plurality of cover plates; the cover plate being located an inner side of a top of the tank body; the cover being supported by the filtering grid so that the plurality of cover plates are formed as a plane to be placed upon a top of the tank body.

What is claimed is: 
     
         1 . A floor water tank filtering device for three-in-one sewers comprising:
 a tank body having a receiving space at an interior thereof; a bottom of the tank body being formed with a drain hole; a filtering grid being installed at the drain hole; a top of the tank body being combined with a cover plate;   the filtering grid being combined at an upper side of the drain hole of the tank body; a top of the filtering grid being provided as a supporting point of the cover; and   the cover being formed by a plurality of cover plates; the cover plates being located an inner side of a top of the tank body; the cover being supported by the filtering grid so that the plurality of cover plates are formed as a plane to be placed upon a top of the tank body.   
     
     
         2 . The floor water tank filtering device for three-in-one sewers as claimed in  claim 1 , wherein each cover plate has at least one via hole for draining water. 
     
     
         3 . The floor water tank filtering device for three-in-one sewers as claimed in  claim 1 , wherein an inner edge of the top of the tank body is formed with an embedding trench for locating the cover; and the embedding trench is installed with a plurality of blocks for locating the cover. 
     
     
         4 . The floor water tank filtering device for three-in-one sewers as claimed in  claim 1 , wherein a positioning recess is formed at a top of the draining hole of the tank body for combining and positioning the filtering grid. 
     
     
         5 . The floor water tank filtering device for three-in-one sewers as claimed in  claim 1 , wherein the drain hole of the tank body extends outwards to be connected to a tube for guiding dirt water to external space. 
     
     
         6 . The floor water tank filtering device for three-in-one sewers as claimed in  claim 1 , wherein a top of the filtering grid is formed with a cruciform positioning lines for locating the cover and causes that slits are formed between the cover plates so that dirt water can flow through the slits for increasing the filtering area.