Curve composite silencing drain pipe

Abstract

The invention relates to drain pipes, in particular to a silencing drain pipe. A multi-layer coextrusion pipe with better sound-proof effects is provided. Silencing is achieved by changing shape of each layer so as to change original sound routes. By the drain pipe produced according to the technical scheme, the internal liquid flow sound cannot be heard no matter the pipe wall is thick or thin, and accordingly actual silencing is achieved. By modifying traditional double-layer or multi-layer coextrusion technology, sounds penetrates through different materials during transmission, the materials are connected through curve faces, part of sounds reflects and transmits in the tube reciprocatingly, and the part of sounds is eliminated. The materials of the tube layers are quite different by changing material formula, when sounds transmits from one medium into anther, the transmission is blocked, and accordingly optimal silencing effects are achieved.

Description

technical field [0001] The invention relates to a drainage pipe, in particular to a silent pipe. Background technique [0002] The existing polypropylene silent drainage pipe adopts a multi-layer co-extrusion production process. The raw materials are recyclable and environmentally friendly impact-resistant polypropylene resin and special sound-absorbing materials. After modification, it has good noise reduction Quiet performance, chemical corrosion resistance, heat resistance. The product has excellent noise reduction and quietness: by adding special materials, the density and microstructure of the pipe can be adjusted, and the audible and sound waves can be absorbed to prevent the sound waves from spreading out. The noise reduction effect is better than that of cast iron pipes. It has super chemical corrosion resistance: the acid resistance of the inner and outer layers of the pipe can reach PH2, and the alkali resistance can reach PH12, and it can discharge liquids of PH2...

AI Technical Summary

Problems solved by technology

Although the mute tubes in the prior art have so many benefits, the mute effect is always unsatisfactory. Although the co-extrusion of multiple materials has been used in the past, the various materials are finally integrated after co-extrusion; the sound passes through the tube When passing through the wall, due to the principle of straight-line propagation, although passing through different densities, the propagation direction does not change, so the sound insulation effect is not good

Polypropylene is a flammable material and is not suitable for use in buildings with high fire protection requirements

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