Ultralow-frequency pipeline silencing device and application thereof

The invention provides an ultralow-frequency pipeline silencing device, and belongs to the technical field of silencing structures. The device comprises a cylinder, wherein a straight-through pipe, a bent pipe, a spiral pipe and a sound absorption structure are arranged in the cylinder; the straight-through pipe is provided with an air inlet and an air outlet; the bent pipe, the spiral pipe, the sound absorption structure and the cylinder body jointly form a sound cavity structure, sound energy is converted into vibration of air mass points through the resonance effect of the sound cavity structure, the sound energy is converted into heat energy through the sound absorption structure and damping in air, then noise sound waves are eliminated, the low-frequency transmission loss can be effectively improved, and the noise reduction effect is achieved. And the medium-high frequency transmission loss is improved, and the silencing performance of the silencing device is improved. 本发明提供了一种超低频管道消声装置，属于消声结构技术领域。本发明包括筒