RING TYPE KOCHETOV'S SOUNDPROOF STRUCTURE Russian patent published in 2017 - IPC E04B1/84 

FIELD: construction.

SUBSTANCE: ring type soundproof structure is implemented in the axial cross section in the form of the ring, the multi-layer soundproof structure is located between its walls, made in the form of symmetrically arranged perforated walls, between which the soundproof element is located, in the form of three layers. The central layer is made of soundproof material of complex profile, consisting of evenly distributed hollow tetrahedrons, allowing to reflect the sound waves falling in all directions. The soundproof layers of different density is attached symmetrically to the central layer. Each of the perforated walls has the following perforation parameters: diameter of holes 3÷7 mm, perforation percentage is 10%÷15%. According to the holes form it can be made as round, triangular, square, rectangular or of diamond profile, while in the case of non-round holes the conditional diameter is taken as equal to the maximum diameter of the of the circle inscribed in the polygon. As the soundproof material it is used either soundproof sheet material, which is made on the base of magnesium binder with reinforced fiberglass or glass or polyester, or porous soundproof ceramic material, having bulk density 500÷1000 kg/m³ and consisting of 100 pts.wt. of perlite with grain diameter 0.1÷8.0 mm, 80÷250 pts.wt. of one from the sintering materials selected from the group consisting of fly ash, slag, quartz, lava, stones or clay as the main material, 5÷30 pts.wt. of nonorganic binder. And after the mixture sintering the perlite particles form the connecting holes between their contact surfaces so, that the internal pores are connecting among themselves.

EFFECT: increase of the noise reduction efficiency and design reliability as a whole.

2 cl, 2 dwg