Sound insulation module on sound insulation apparatus of large noise equipment

A sound insulation device and equipment technology, applied in the direction of sound-generating equipment, instruments, etc., to achieve obvious sound insulation effect, simple structure, and improve the effect of sound absorption coefficient

Inactive Publication Date: 2009-04-08
JIANGSU ZHONGNENG POWER EQUIP
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AI-Extracted Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a large sound insulation device that can be assembled into a sound insulation device, can significantly reduce the noise pollutio...
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Method used

The sound-absorbing cotton board 2 of the inside of the present invention is made of dense sizing cotton board with good sound-absorbing effect, and the sound-absorbing cotton board 4 is made with the loose cotton board with good sound-absorbing effect, and this layer is made of sound-insulating cotton felt in the middle of two sound-absorbing cotton boards 3 are evenly distributed an...
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Abstract

The invention provides a sound insulation module on the sound insulation device of large-noise equipment, which is widely applied to the noise disposal of large-noise equipment in the industries such as power, petrochemicals, metallurgy and the like. The module, from external layer to internal layer, sequentially comprises a sound insulation plate, a damping vibration layer and a sound-absorbing wool plate; from internal layer to external layer, the module sequentially comprises a porous sound-absorbing steel plate and a sound-absorbing wool plate; the circumference of the module is provided with reinforcing plates vertical to the porous sound-absorbing steel plate and the sound insulation plate; the sound insulation module is characterized in that a layer of sound insulation wool felt and a rectangular sound refluxing chamber are arranged between two sound-absorbing wool plates uniformly and intermittently. The sound insulation module prolongs the staying time of the sound in the sound refluxing chamber, enlarges the contact area between the noise and the wool plate and the wool felt, converts more sound energy into the heat energy inside the wool plate and the wool felt and improves the sound-absorbing coefficient of the material; the sound insulation quantity reaches more than 40dB, which is higher than the similar product by 15-35%.

Application Domain

Sound producing devices

Technology Topic

Steel platesWool +9

Image

  • Sound insulation module on sound insulation apparatus of large noise equipment
  • Sound insulation module on sound insulation apparatus of large noise equipment
  • Sound insulation module on sound insulation apparatus of large noise equipment

Examples

  • Experimental program(1)

Example Embodiment

[0013] refer to figure 1 , the present invention is a sound insulation module on the sound insulation device of loud noise equipment, the module consists of a sound insulation board 8, a damping and vibration reduction layer 7, and a sound-absorbing cotton board 4 from the outer layer to the inside; 1. Sound-absorbing cotton board 2; the module is surrounded by ribs 6 perpendicular to the perforated sound-absorbing steel plate and the sound-insulating board. The feature is that a layer of sound-insulating cotton felt 3 and rectangular The sound returns to cavity 5.
[0014] The present invention mainly is divided into two kinds of plane type and circular arc (as figure 1 and image 3 ).
[0015] The sound-absorbing cotton board 2 on the inner side of the present invention is made of dense sizing cotton board with good sound-absorbing effect, and the sound-absorbing cotton board 4 is made of loose cotton board with good sound-absorbing effect, and the middle layer of the two sound-absorbing cotton boards is evenly distributed with sound-proof cotton felt 3 And spaced into rectangular sound return cavity 5, to improve low-frequency sound absorption, that is, the sound absorption coefficient. The actual measurement: the frequency is 125-500Hz, its sound absorption coefficient is 0.75-0.80; the frequency is 500-1000Hz, its sound absorption coefficient is 0.90-0.90; the frequency is 1000-2000Hz, its sound absorption coefficient is 0.98-0.99.
[0016] In the work of the present invention, after the noise source is fully silenced by the perforated sound-absorbing steel plate 1, it enters the interior of the sound-insulating module. The sound energy is converted into heat energy, and then the damping layer 7 is used for sound insulation and vibration reduction, and finally the sound insulation board 8 completely blocks the noise from spreading outward.

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Description & Claims & Application Information

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