An acoustic barrier for noise reduction in an outdoor substation

Abstract

The invention provides an acoustic barrier for noise reduction in an outdoor substation. The acoustic barrier comprises a microporous fiber composite sound absorbing plate, a rock wool plate, a restraining damping plate and a cavity. The microporous fiber composite sound absorbing plate, the rock wool plate and the constraint damping plate are arranged in order in the horizontal direction; The microporous fiber composite sound absorbing board comprises an inner layer microperforated board and an outer layer aluminum fiberboard; A first cavity is arranged between the micro-perforated board andthe aluminum fiberboard, and a second cavity is arranged between the aluminum fiberboard and the rock wool board. The sound barrier provided by the invention has wide sound insulation frequency band,good weather resistance, good mechanical performance and adjustable acoustic performance.

Description

technical field [0001] The invention relates to a sound barrier, in particular to a sound barrier for outdoor substation noise reduction. Background technique [0002] With the rapid development of modern economy and society, the power load is increasing day by day, resulting in higher and higher transmission voltage levels, and high-voltage and ultra-high-voltage outdoor substations are becoming more and more common. Because the main transformers and power distribution devices of outdoor substations are open The noise source can spread freely to the outside world. Excessive noise in substations has become an urgent problem to be solved in substations, and it also affects the development of power grid construction to a certain extent. [0003] Noise control measures are basically controlled from two aspects: sound source and sound source propagation path. Among them, controlling from the source is the most effective method, but it is difficult to control and the cycle is lo...

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Problems solved by technology

Among them, controlling from the source is the most effective method, but it is difficult to control and the cycle is long. It is still in the research stage in our country, and it is rarely put into practical application. At present, the substations in service mainly adopt noise reduction control on the sound source propagation path , for substations that have been built and have been in stable operation for many years, it is quite difficult to update low-noise equipment and control the distance between substations and people's living, activities, and workplaces. , noise reduction and other measures to increase the energy loss of noise in the transmission path, to achieve the purpose of reducing noise pollution

[0004] Sound barrier is a commonly used noise reduction measure in substations, especially in the high-frequency band, the sound insulation effect is better, but the noise energy of substations is mainly low-frequency noise; The material puts forward very high requirements, but the existing sound barrier materials have poor weather resistance, and the weathering phenomenon is serious after long-term work, resulting in a rapid decline in the overall performance of the sound barrier

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