Environmental protection noise reduction device

Abstract

The invention relates to an environmental protection noise reduction device comprising a connecting part and a silencing part which is connected with the connecting part. The silencing part is internally provided with a driving box and a silencing disc. The driving box is internally provided with an air bag. Multiple first pull ropes are connected on the internal wall of the driving box. Multiplepush balls are tied on the first pull ropes. Multiple push balls are distributed around the air bag. The silencing disc comprises an external ring and an internal disc. The internal disc is rotatablyconnected in the external ring. The external ring is provided with multiple radially arranged first silencing holes. The internal disc is provided with multiple second silencing holes capable of exactly facing the first silencing holes. The side wall, which is fit with the internal wall of the external ring, of the internal disc and the internal wall of the external ring are provided with sound absorbing material. The box wall of the driving box is provided with multiple through holes exactly facing the push balls. Multiple sound transmission tubes are connected on the connecting part. The sound transmission tubes are provided with multiple first branch tubes which are connected with the through holes and second branch tubes which are connected with the first silencing holes. A linkage mechanism is connected between the internal disc and the air bag. According to the scheme, the sound is enabled to be reflected in the closed sound absorbing material so that the noise reduction effect can be enhanced.

Description

Technical field [0001] The invention relates to the technical field of environmental protection, in particular to an environmental protection noise reduction device. Background technique [0002] With the rapid development of the national economy, environmental noise has become one of the public hazards of contemporary human life. As the largest developing country in the world, environmental protection and governance are one of my country's important national policies. Vibration and noise reduction has become an important part of environmental protection measures. [0003] Current noise reduction devices usually include sound-absorbing materials. Because the sound-absorbing materials are loose and porous, sound is reflected multiple times in the sound-absorbing materials, thereby reducing the energy of the sound and achieving the purpose of absorbing sound. However, most sound-absorbing materials are in an open environment rather than closed. Although sound-absorbing materials can...

AI Technical Summary

Problems solved by technology

However, most of the sound-absorbing materials are in an open environment rather than closed. Although the sound-absorbing materials can absorb a certain amount of noise, for louder noises, the sound will inevitably be reflected from the sound-absorbing materials to the outside world many times. environment, so that there is still a certain amount of noise in the external environment, so the effect of noise reduction is not very good

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