A liquid pipeline noise reduction system based on underwater wide-frequency sound-insulating metal-based metamaterials

Abstract

The invention provides a liquid pipeline noise reduction system based on an underwater wide and low frequency sound insulation metal-based metamaterial, comprising a main body structure, an inlet flange, an inlet cylindrical through pipe, an outlet flange and an outlet cylindrical through pipe. The two ends of the structure are respectively connected with the inlet cylinder through pipe and the outlet cylinder through pipe, and the liquid inlet end of the inlet cylinder through pipe is connected with an inlet flange, which is connected with the flange of the water inlet pipe of the pipeline through the inlet flange. The liquid outlet end of the cylindrical through pipe is connected with an outlet flange, which is connected with the flange of the water outlet pipe of the pipeline through the outlet flange; the interior of the main structure has a cavity connected with the inlet cylindrical through pipe and the outlet cylindrical through pipe , two or four sound-insulating material boards with rubber wrapping and sealing are placed inside the cavity close to the inner wall. The invention breaks through the limitation of traditional materials, and utilizes a special underwater wide-frequency sound-insulating metal-based metamaterial to realize the wide-low-frequency sound-insulation of the liquid in the pipeline.

Description

technical field [0001] The invention relates to the technical field of liquid pipeline noise reduction and underwater sound propagation control, in particular, to a liquid pipeline noise reduction system designed based on an underwater wide-low frequency sound insulation metal-based metamaterial. Background technique [0002] The liquid pipeline system can directionally transport liquid media to the destination to meet the needs of engineering, and is widely used in the field of industrial production and military equipment. For example, hydraulic pipes inside spacecraft and submarines, oil pipelines on offshore platforms, etc., liquid pipelines all play an important role. However, the liquid pipeline itself is mostly made of solid material or metal. When these pipelines are in use, there will be a large amount of pipeline structure vibration noise radiation and low-frequency noise radiation inside the liquid. When these noises resonate with the structure, they will be harmfu...

AI Technical Summary

Problems solved by technology

Therefore, in order to solve the problem of low-frequency noise suppression efficiency of the existing muffler under the liquid pressure in the pipe, the present invention designs a liquid pipeline muffler system based on underwater wide and low-frequency sound insulation metal-based metamaterials. The sound insulation material has extremely low impedance, which can effectively block underwater wide and low frequency underwater sound. At the same time, its base material is metal material, which has good bearing capacity

Images