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Multi-frequency selection noise reduction device

A multi-frequency, noise reduction technology, applied in the direction of instruments, synthetic resin layered products, electrical equipment structural parts, etc., to achieve the effect of high practicability, good sound insulation and noise reduction effect, and simple structure

Pending Publication Date: 2022-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a multi-frequency selective noise reduction device, which can effectively isolate complex industrial noise in different frequency bands of medium and high frequencies and medium and low frequencies, and at the same time solve the problem of ventilation and heat dissipation of high-temperature equipment pipelines. sex

Method used

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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the multi-frequency selective noise reduction device in Embodiment 1 of the present invention is composed of an inner layer noise reduction unit 1 and a vacuum noise reduction unit 2 . The inner layer noise reduction unit 1 includes an inner substrate 11 , an inner cladding layer 12 , an inner sound absorbing layer 13 and an inner sound insulating layer 14 from inside to outside (the inside is closer to the noise source). The outermost part of the vacuum noise reduction unit 2 is a vacuum outer frame 24 , and the vacuum outer frame 24 is supported on the panel of the inner sound insulation layer 14 through the first vibration-damping connector 21 to form an airtight vacuum layer 22 . The vacuum noise reduction unit 2 further includes a heat conduction connecting member 23 , and the heat conduction connecting member 23 penetrates the inner layer noise reduction unit 1 and the airtight vacuum layer 22 . A vacuum gauge 221 and a vacuum valve 222...

Embodiment 2

[0043] Such as figure 2 As shown, the multi-frequency selective noise reduction device according to Embodiment 2 of the present invention is composed of an inner layer noise reduction unit 1 , a vacuum noise reduction unit 2 and an outer layer noise reduction unit 3 . The inner layer noise reduction unit 1 includes an inner substrate 11 , an inner cladding layer 12 , an inner sound absorbing layer 13 and an inner sound insulating layer 14 from inside to outside (the inside is closer to the noise source). The outermost part of the vacuum noise reduction unit 2 is a vacuum outer frame 24 , and the vacuum outer frame 24 is supported on the panel of the inner sound insulation layer 14 through the first vibration-damping connector 21 to form an airtight vacuum layer 22 . The vacuum noise reduction unit 2 further includes a heat conduction connecting member 23 , and the heat conduction connecting member 23 penetrates the inner layer noise reduction unit 1 and the airtight vacuum la...

Embodiment 3

[0048] Embodiment 3 is a specific application embodiment of the noise reduction device of the present invention. When the noise spectrum of the high-noise equipment pipeline presents a wide-band, high-intensity feature, and the temperature of the equipment pipeline is 30-40°C, and the temperature difference between the inside and outside air is less than or equal to 5°C, the noise reduction device of the present invention only uses the inner layer noise reduction unit 1 and Vacuum noise reduction unit 2, that is, the structure of embodiment 1: specifically, the inner layer substrate 11 is pasted with the inner cladding layer 12, the inner cladding layer 12 is filled with an inner sound-absorbing layer 13, and the inner sound-absorbing layer 13 is attached with an inner sound-insulating layer 14, The inner sound insulation layer 14 is connected to the vacuum outer frame layer 24 through the first vibration-damping connector 21, the vacuum layer 22 is evacuated by a vacuum pump, ...

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Abstract

The invention discloses a multi-frequency selection noise reduction device which comprises an inner-layer noise reduction unit which is arranged on one side close to a noise source and is sequentially provided with an inner-layer substrate, an outer-layer substrate, an outer-layer substrate, an outer-layer substrate, an outer-layer substrate and an inner-layer noise reduction unit from inside to outside, an inner coating layer adhered to the inner layer substrate; the inner sound-absorbing layer is made of a porous sound-absorbing material; and the inner sound insulation layer is of a panel structure. The vacuum noise reduction unit is provided with a vacuum outer framework, and the vacuum outer framework is supported on the panel of the inner sound insulation layer through a first vibration reduction connecting piece to form a closed vacuum layer; the vacuum noise reduction unit further comprises a heat conduction communicating piece, and the heat conduction communicating piece penetrates through the inner layer noise reduction unit and the closed vacuum layer. The device can effectively isolate complex industrial noise in different frequency bands of medium-high frequency and medium-low frequency, solves the problem of ventilation and heat dissipation of high-temperature equipment pipelines, and is simple in structure and good in universality.

Description

technical field [0001] The invention belongs to the technical field of industrial noise control, in particular to a multi-frequency selective noise reduction device. Background technique [0002] Noise is a common risk factor for occupational hearing loss, and long-term exposure to high noise can lead to noise deafness. There are many kinds of dynamic equipment such as compressors and steam turbines in chemical enterprises, and they are arranged in a centralized manner with process pipelines. They form roaring noises in the working environment area. Workers' occupational health. In the process of industrial noise hazard control, there are the following problems: 1) The spectrum characteristics of on-site noise in the chemical industry are very complex, including steady state and unsteady state, some are dominated by medium and high frequencies, and some are dominated by medium and low frequencies. Conventional sound insulation equipment has a significant effect on medium a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/168B32B5/02B32B5/26B32B15/085B32B15/095B32B15/14B32B15/18B32B15/20B32B27/12B32B27/32B32B27/40H05K7/20
CPCG10K11/168B32B15/20B32B15/18B32B15/14B32B5/02B32B5/022B32B5/26B32B27/40B32B27/12B32B15/085B32B15/095B32B27/32H05K7/20136B32B2262/101B32B2262/108B32B2262/10B32B2307/10B32B2307/102
Inventor 孙迪于金宁张昌运
Owner CHINA PETROLEUM & CHEM CORP
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