FIELD: construction.
SUBSTANCE: device comprises a unit of one or more bent pipelines with a wave shape of the passage section, interconnected by lateral sides. The unit is fixed in the flow path of coastal currents. Each pipeline with the wave shape of the passage section is curved at an angle from 30° to 180° and more with a pitch of screw lines along the outer perimeter, changing by a diameter of the pipeline, and with a wave screw surface along the inner perimeter in the form of waveform pockets. The pipeline is mounted of sections with a multi-start wave screw surface of a double curvature. The surface of sections is provided with screw grooves inside and outside the pipeline at an angle to its axis as the waveform pockets with centres of the curvature, located outside and inside the cross section of the pipeline. The pipeline is mounted of sections, each of which is designed as a circular sector. The circular sector is made of a strip wound in a ring with the formation of quadrangles different in sizes with two parallel sides. In this case, the sections are interconnected by free sides of the quadrangles in the form of a hollow pipeline with the formation of the waveform screw surfaces along the outer and inner surfaces as the waveform pockets along the outer and inner surfaces, which can be different by the shape and sizes along the perimeter of the pipeline, directed to one side at an angle to the longitudinal axis of the pipeline with the wave shape of the passage section. The distance between the fold lines is equal to the sum of the perimeter lengths of geometric figures of the pockets of the inner and outer surfaces.
EFFECT: purification of aquatic areas of bays and gulfs by means of a flow in their stagnant water and an increase of water circulation.
12 dwg
