Curve composite silencing drain pipe

A drainage pipe and mute technology, applied in the field of drainage pipes, can solve the problems of incompatibility, poor sound insulation effect, unsatisfactory mute effect, etc., and achieve good sound insulation effect.

Inactive Publication Date: 2013-04-24
张飞军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Curve composite silencing drain pipe
  • Curve composite silencing drain pipe
  • Curve composite silencing drain pipe

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0015] like figure 1 As shown, this embodiment is completed with a two-layer structure, wherein the outer ring layer is mainly made of PVC material, and the inner ring layer is mainly made of ABS material, wherein PVC adopts a unique formula: specifically, 6-10 10-25 parts of chlorinated polyethylene, 10-25 parts of iron ore powder, 0.8-4 parts of calcium stearate, 0.3-1 part of titanium dioxide, 0.1-3.5 parts of pigment; the unique formula used in the inner ring layer ABS: Specifically, add 15-20 parts of nano calcium carbonate to 100 parts of ABS; 0.2-1.5 parts of stearic acid; 10-15 parts of polyimide; 0.15-0.5 parts of compound lubricant; 2-10 parts of CPE; 3-5 parts of titanium dioxide; 0.15-0.5 parts of antioxidant. Put the materials of the above formula into the extruder, whether it is double-layer extrusion or multi-layer extrusion, it is necessary to put the ABS material into the innermost layer as the inner ring layer 2, and arrange the PVC material on the outermost...

specific Embodiment 2

[0017] like figure 2 As shown, this patent has made a further improvement on the basis of the first solution. During the extrusion process, a vacuum grid 3 is arranged in the middle layer. The height of the vacuum grid 3 should not be too high, and should be kept at 1 / 4 of the wall thickness. At the same time, the vacuum grid adopts a polygonal structure to ensure vacuum in the space during the extrusion process. This method is suitable for thick diameter tubes, especially for some large diameter nozzles. For example, when the tube diameter is greater than 16CM, due to this A pipe with a large cavity and a large displacement. Therefore, more noise will be generated, and the previous solution cannot completely silence large-diameter pipes. When we adopt this solution, on the one hand, in addition to the reasons in the previous case, there is also vacuum sound insulation, and the vacuum grid The polygonal structure is used to reflect the sound from multiple angles, so as to ac...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/21F16L11/06F16L11/26
Inventor 张飞军
Owner 张飞军
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