关键词: 火电厂, 管道包扎, 隔声性能, 共振, 低频

Abstract: Currently, wrapped insulation materials are generally used for pipeline insulation. This kind of pipe insulation enswathement structure is very effective in insulating high-frequency sound. However, in the case of low frequency sound, especially when the wavelength is over ten times greater than the thickness of the materials, resonance is likely to occur between the pipeline and the wrapping material layer, which will cause drastic deterioration of the sound insulation performance. This paper presents a double division type of composite insulation enswathement structure. It can improve the low frequency sound insulation performance significantly without changing the original wrapping thickness and insulation performance, which effectively solves the problem of pipe insulation enswathement with poor low-frequency sound insulation performance.

Key words: thermal power plant, pipe bandaging, sound insulation performance, resonance, low frequency