Full-band noise-reducing shield and shielding device for substation

A noise reduction, full-band technology, applied in the direction of noise absorption devices, buildings, etc., to achieve the effect of reducing noise, small thickness, and compensating for low-frequency noise

Inactive Publication Date: 2016-12-07
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0005] For example, the low-frequency sound-absorbing and noise-reducing device disclosed in the Chinese utility model patent "A Low-Frequency Sound-Absorbing and Noise-Reducing Device for Indoor Substations" (Authorized Notice No. CN204356925 U) has installation requirements. Has a certain effect on indoor low-frequency noise

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  • Full-band noise-reducing shield and shielding device for substation

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] The noise reduction principle of a full-band noise reduction barrier for substations is as follows: when the transformer radiated noise passes through the full-band noise reduction barrier, it first passes through the metamaterial low-frequency noise reduction layer 2, and the sound wave frequency in the low-frequency band of the transformer radiated noise and The resonant frequency of the mass block 5 on the film 4 matches, causing the resonance of the mass block 5, thus consuming the low-frequency noise energy, and then passing through the high-frequency noise reduction layer 7, part of the...

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Abstract

The invention relates to the field of noise control, in particular to a full-band noise-reducing shield and a shielding device for a substation. The full-band noise-reducing shield comprises a low-frequency noise-reducing metamaterial layer and a high-frequency noise-reducing layer, wherein the low-frequency noise-reducing metamaterial layer is arranged at the front end of a full-band noise-reducing shield body; the high-frequency noise-reducing layer is arranged at the back end of the low-frequency noise-reducing metamaterial layer; the low-frequency noise-reducing metamaterial layer comprises a plurality of periodically-arranged lattices; a silicone rubber elastic film is arranged in each lattice; a mass block is stuck to the sound incidence side of each silicone rubber elastic film. The full-band noise-reducing shield can be arranged near a transformer to effectively reduce full-band noises from the noise transmission path of the transformer; compared with the conventional sound shield, the full-band noise-reducing shield has the advantages of large sound reduction index, small thickness, light weight and the like, and can effectively make up the deficiency that the conventional sound shield is unlikely to block low-frequency noises below 500Hz.

Description

technical field [0001] The invention relates to the field of noise control, in particular to a full-band noise reduction barrier and a shielding device for substations. Background technique [0002] Substation is an important place for power transfer. In recent years, with the development of the national economy, urban power consumption has increased rapidly, and the density of power loads in urban centers has increased. 110~220kv and even 500kv substations have entered the central urban area, especially Some of the substations built earlier have gradually become residential areas, and the urbanization of substations has become more and more serious, which has caused great contradictions with the surrounding human settlements. With the continuous improvement of people's awareness of environmental protection, the number of substation noise nuisance complaints has gradually increased, so it is particularly urgent to develop new technologies and products related to substation n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F8/00
CPCE01F8/0005
Inventor 李诚刘首文蔡骏峰汤胜李延锋章林柯周波刘海琼徐琴江文娟王旋项涛吴喻飞周革胜陈艳邹芹柯亮吕露李刚张硕石一辉李松李和君
Owner STATE GRID CORP OF CHINA
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