Dual-layer three-dimensional noise reduction protection screen

A protective screen and three-dimensional technology, which is applied in the direction of sound-emitting devices and instruments, can solve the problems of low-frequency noise pollution, etc., and achieve the effects of reducing low-frequency noise, easy maintenance, and convenient update

A protective screen and three-dimensional technology, which is applied in the direction of sound-emitting devices and instruments, can solve the problems of low-frequency noise pollution, etc., and achieve the effects of reducing low-frequency noise, easy maintenance, and convenient update

CN104269166AInactive Publication Date: 2015-01-07STATE GRID CORP OF CHINA +2
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  • Dual-layer three-dimensional noise reduction protection screen
  • Dual-layer three-dimensional noise reduction protection screen
  • Dual-layer three-dimensional noise reduction protection screen

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] The invention is a novel double-layer three-dimensional noise reduction protective screen, such as figure 1 As shown, it includes a plurality of flat-headed sound-absorbing wedges 1 and a resonance and noise reduction structure; its feature is that the resonance and noise reduction structure is composed of a three-dimensional support 3 and a metal sheet 4; the three-dimensional support 3 is a box structure, and the metal sheet 4 is installed on a three-dimensional On one side of the bracket 3, the flat-head sound-absorbing wedge 1 is installed on the other side of the three-dimensional bracket 3; a plurality of microholes 5 are opened on the metal sheet; the middle cavity of the three-dimensional bracket 3 is filled with an in-situ resonance material 6, and the in-situ resonance The material contains solid metal lead beads. When the low-frequency noise...

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Abstract

The invention provides a dual-layer three-dimensional noise reduction protection screen which comprises a plurality of flattop sound absorption wedges and a resonance noise elimination structure. The resonance noise elimination structure is composed of a three-dimensional support and a metal sheet. The three-dimensional support is of a box-type structure, the metal sheet is installed on one side of the three-dimensional support, the flattop sound absorption wedges are installed on the other side of the three-dimensional support, the metal sheet is provided with a plurality of micropores, a middle cavity of the three-dimensional support is filled with in-situ resonance materials, the flattop sound absorption wedges are of a pointless tetrahedral cone structure, and an inward-concave connecting groove is formed in the bottom of the protection screen. The dual-layer three-dimensional noise reduction protection screen is capable of effectively lowering low-frequency noise, easy to maintain, convenient to renew and longer in service life.

Description

technical field [0001] The invention belongs to the technical field of environmental protection facilities, and mainly relates to a sound-absorbing and noise-reducing protective screen, in particular to a double-layer three-dimensional noise-reducing protective screen. Background technique [0002] With the development of modern cities, the load density of urban power supply is increasing, and the power supply radius of substations is getting smaller and smaller, and some substations are located in densely populated areas in the city center. The noise generated during the operation of various electrical equipment (such as transformers) in the substation will inevitably have an impact on nearby residents and the environment. Today, with the increasing awareness of environmental protection, letters, calls, and complaints about substation power facilities, especially low-frequency noise, are increasing year by year. Low-frequency noise is sound below 500Hz, which is unwanted ...

Claims

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Application Information

Patent Timeline
07 Jan 2015
Publication
CN104269166A
IPC
G10K11/162; G10K11/168; G10K11/172
Inventors
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