DEVICE FOR CLEANING OF WATER AREAS OF BAYS AND GULFS WITH MULTIANGULAR INNER SCREW SURFACE OF PIPELINES Russian patent published in 2015 - IPC E02B15/00 E02B3/00 E02B8/02 

FIELD: construction.

SUBSTANCE: device includes one and more bent screw-shaped pipelines connected to each other with lateral sides and mounted in one unit, which is fixed on the flow way of coastal currents to change the direction of some part of water flow, increase its speed and introduce these flows to a water area of bays and gulfs. Each pipeline is bent at an angle of 45° to 170° with a multiturn screw surface provided with helical grooves inside and outside the screw-shaped pipeline at an angle to its axis in the form of pockets of a polygonal shape in the form of different geometrical figures with four and more lateral sides. Each screw-shaped pipeline is made in the form of hollow screw drums coaxially installed and rigidly attached to each other and provided with pockets in the form of different geometrical figures, which are located along internal perimeter, for example four: a screw drum of a conical shape - a receiving section and two straight-line screw drums - straight-line sections, between which there stiffly mounted is a hollow sector with a bend angle of 30°-180°, with pockets of polygonal shape, which are located along their internal perimeter and made in the form of different geometrical figures with four and more lateral sides. The receiving section being the screw drum of a conical shape is made of least three strips of trapezoid shape with different dimensions as to width, with their increase as to length of the receiving part, which are twisted in vertical plane in longitudinal direction relative to the proper symmetry axis of the strip and bent along the screw line in transverse direction on a conical mandrel. Two hollow straight-line sections are made in the form of a multiturn screw drum from at least one strip bent along straight lines arranged at an angle to the strip edges, with formation of similar parallelograms located alternately on the strip to the opposite sides; with that, the strip is rolled into cylindrical coils connected to each other along longitudinal edges, with formation on the inner surface of one-directional screw lines and screw pockets of a polygonal shape. Distance between straight bend lines is equal to length of each element of the polygon. Shape and dimensions of the pockets can be different both as to shape and dimensions and as per perimeter of straight-line sections. A hollow sector is made in the form of a multiturn screw drum provided with helical grooves inside at an angle to its axis, in the form of pockets of a polygonal shape in the form of different geometrical figures with four and more lateral sides; with that, distance between straight bend lines is equal to length of each element of the polygon and assembled of sections made from a strip rolled into a ring, a polyhedral surface and formation of squares that are different as to dimensions and have two parallel sides located parallel to each other. Sections are connected to each other with free sides of the above squares in the form of a hollow sector.

EFFECT: providing cleaning of stagnant and polluted waters of bays and gulfs by creation inside them of constant circulation of clean water due to turning and direction of coastal currents deep into their water area, increase of speed of artificially created currents with further output to an open sea with these currents of pollutions of bays and gulfs.

23 dwg