Silencing device

By combining a silencing duct and a negative pressure generating device, the problem of exhaust noise from pneumatic equipment was solved, achieving effective noise reduction and environmental protection.

CN224397438UActive Publication Date: 2026-06-23SHENZHEN HANGSHI ELECTRONIC TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202521426763.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-08
Publication Date
2026-06-23
Estimated Expiration
2035-07-08

AI Technical Summary

Technical Problem

The high-frequency airflow noise and impact noise generated by existing pneumatic equipment during exhaust seriously affect the working environment, and traditional sound insulation measures are costly and have limited effectiveness.

Method used

The system employs silencing pipes and a negative pressure generating device to isolate high-frequency airflow noise through a silencing chamber and discharge high-pressure airflow outdoors. The negative pressure environment buffers the airflow impact, and the combination of a one-way valve and a sound-absorbing layer further reduces noise.

Benefits of technology

It effectively reduces the noise generated by the exhaust valve of the pneumatic device, avoids the disturbance of the working environment by high-frequency airflow, reduces noise and improves the scheduling efficiency of the production line.

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Abstract

The utility model relates to the technical field of noise reduction equipment, and provides a noise reduction device which comprises a plurality of noise reduction pipelines provided with noise reduction cavities used for eliminating impact noise of exhaust of an exhaust valve of a pneumatic device, and the noise reduction pipelines communicate with one another; the at least one air inlet port is formed in the outer surface of the silencing pipeline, the air inlet port is communicated with the silencing cavity, and the air inlet port is used for being communicated with an exhaust valve port of a pneumatic device; and the negative pressure generating device is arranged on the silencing pipeline, and the negative pressure generating device is used for sucking air in the silencing cavity. Impact noise of high-frequency airflow of the pneumatic device is isolated through the silencing cavity of the silencing pipeline, the high-pressure airflow is exhausted outdoors, disturbance of exhaust airflow to the working environment is avoided, and therefore noise generated by an exhaust valve of the pneumatic device can be effectively reduced. And the impact of airflow can be buffered through the negative pressure environment in the silencing cavity, and noise can be further reduced.
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