Array type silencer

A muffler and array technology, applied in rigid pipes, pipes, pipes/pipe joints/fittings, etc., can solve the problems of unsatisfactory noise reduction effect, inconvenient transportation and installation, large airflow resistance, etc., to reduce noise reduction cost and convenience. Transport and installation, effect of flow rate reduction

Inactive Publication Date: 2008-10-01
方庆川 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common large-scale air ducts, such as: subways, mines, and tunnels, use chip mufflers. This type of muffler has the characteristics of simple structure, but has the disadvantages of unsatisfactory muffler effect, large air resistance, large volume, and inconvenient transportation and installation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment one, such as figure 1 As shown, the array muffler of the present invention is composed of a sound-absorbing pipe body 1 and a bracket 2, the sound-absorbing pipe body 1 has a circular section, and both ends are arc-shaped shrouds, such as Figure 16-1 As shown in , the cross-sectional shape of the arc-shaped shroud is circular, such as Figure 16-1 Figure 16-2 to Figure 16-6 As shown, it can also be triangular, quadrangular, pentagonal, hexagonal or octagonal. The exterior of the sound-absorbing pipe body 1 is provided with a perforated plate along the surface of the pipe body, as shown in Figure 17, the shape of the perforated plate is circular, such as Figure 17-1 to Figure 17-3 As shown, it can also be triangular, quadrangular, pentagonal, hexagonal or octagonal. The interior of the sound-absorbing pipe body 1 is filled with sound-absorbing material, and the sound-absorbing material is mineral wool. The axes of adjacent sound-absorbing pipes 1 are ar...

Embodiment 2

[0045] Embodiment two, such as figure 2 As shown, the array type muffler of the present invention is composed of a sound-absorbing pipe body 1 and a bracket 2. The sound-absorbing pipe body 1 has a circular section, two ends are arc-shaped shrouds, and the outer surface is provided with a perforated plate. The sound-absorbing pipe The interior of the body 1 is filled with sound-absorbing materials, and the axes of the adjacent sound-absorbing pipe bodies 1 are arranged in an equilateral triangle. 4 mm 2 The length is 1000mm. The sound-absorbing pipe body 1 is fixed and installed on the bracket 2 through bolts and other standard parts, and the bracket 2 is fixed in the ventilation pipe 3 of the civil construction by bolts. The axis of the sound-absorbing pipe body 1 adjacent to the wall of the ventilation pipe The distance between the 3 walls is 500mm.

Embodiment 3

[0046] Embodiment three, such as image 3 As shown, the array muffler of the present invention is composed of a sound-absorbing pipe body 1 and a bracket 2. The section of the sound-absorbing pipe body 1 is an equilateral triangle, and the two ends are arc-shaped shrouds. The rest of the surface is a perforated plate, and the perforated plate is an equilateral triangle. The sound-absorbing pipe body 1 is filled with sound-absorbing materials, and the adjacent sound-absorbing pipe body 1 axes are arranged in an equilateral quadrilateral. The distance is 600mm, and the cross-sectional area of ​​the sound-absorbing pipe body 1 is 1.6x10 5 mm 2 , 2000mm in length, the sound-absorbing pipe body 1 is fixedly installed on the bracket 2 through bolts and other standard parts, and the bracket 2 is fixed in the civil ventilation duct 3 by bolts, and the axis of the sound-absorbing pipe body 1 adjacent to the ventilation duct 3 wall is in line with the ventilation duct The distance bet...

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Abstract

The invention discloses an array type muffer, the technical problems to be solved are to advance the silencing ability. The array type muffer is provided with an absorbing body in the tube, wherein the absorbing body is a tube provided with sound absorption material inside, the axis of the tube is arranged along the airflow direction in parallel, and the tube is fixedly arranged in the air pipe through the bracket. Compared with the existing technology, in the same length of the muffer, the absorption surface of the unit cross area is increased, the absorption property is advanced, the noise reduction effect is good, which ensures that in the same noise reduction effect, the length and the volume of the muffer are reduced, the air flow area of the unit cross area is increased, the flow velocity of the absorbing body is reduced, the air noise is reduced, the pressure loss is small, thereby reducing the pressure of the system fan, reducing the cost of the air system. The whole muffer is decomposed into each small absorbing body and the parts for installing the bracket, which is convenient for the transportation and installment.

Description

technical field [0001] The invention relates to a noise reduction device, in particular to a device suitable for noise reduction and airflow noise reduction of large cross-section ventilation ducts. technical background [0002] Noise is a kind of sound that causes people's irritability and endangers human health. Noise reduction usually adopts the methods of sound absorption, noise elimination and sound insulation. The muffler is a common device that can not only allow airflow to pass through but also effectively reduce noise. It can reduce the noise transmitted at the inlet and outlet of various aerodynamic equipment or along the pipeline. Different mufflers have different noise reduction principles. Commonly used noise reduction techniques include resistive noise reduction, resistance noise reduction, loss-type noise reduction, and diffusion noise reduction. Common large-scale air ducts, such as: subways, mines, and tunnels, use chip mufflers. This type of muffler has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/033F16L9/21
Inventor 方庆川李清
Owner 方庆川
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