Silencing device of pneumatic rock drill

Abstract

The invention relates to a silencing device of a pneumatic rock drill. Silencing plates, pneumatic airflow nets, conversion connecting inserting ports, groove plates, silencing sheets, a noise lowering box, a decibelmeter, a vacuum baffle, a branching hinge, a permanent magnet, a power interface, a circulation dust filter pipe, a draught fan, a carbon fiber plate and a silencing box are included.The silencing plates are fixedly arranged on the left side and the right side of a front panel of the noise lowering box. The silencing box is fixedly arranged between the silencing plates and internally electrically connected with the draught fan. The pneumatic airflow nets are fixedly arranged above the silencing plates. After the silencing device of the pneumatic rock drill works, a plurality of fixing structures are arranged inside, load bearing and stability of a box are accurate, the pneumatic rock drill works more stably and reliably during exhaust silencing, the product quality is improved, meanwhile, the guarantee is further provided for usage of the silencing device in pneumatic rock drill, and space is saved.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing devices, in particular to a sound-absorbing device for a pneumatic rock drill. Background technique [0002] The exhaust muffler that uses on the pneumatic rock drill is just a single-section expansion chamber muffler cover that is used to reduce exhaust velocity now, although it is simple in structure, and volume is less, but muffler effect is poor. In order to obtain a higher sound attenuation capacity, multi-section expansion chambers are connected in series, and porous or fibrous sound-absorbing linings are laid on the walls of the expansion chambers, or combined structures such as resonant sound-absorbing chambers and ejectors are set. However, since the exhaust of a pneumatic rock drill is a high-speed, pulsating airflow, and its noise intensity is not only related to the exhaust velocity, but also depends on the pressure pulsation of the exhaust gas, the above-mentioned muffler has ...

AI Technical Summary

Problems solved by technology

However, because the exhaust of a pneumatic rock drill is a high-speed, pulsating airflow, and its noise intensity is not only related to the exhaust velocity, but also depends on the pressure pulsation of the exhaust gas, the above-mentioned muffler has either insufficient muffler capacity, too large volume, or structural Complicated and other disadvantages

[0003] Moreover, the existing traditional pneumatic rock drills are inconvenient for production, transportation and construction, and the effect of solving the problem is not ideal.

Moreover, its specifications and sizes are different. Excessively large heat insulation and noise reduction equipment takes up a lot of space and is inconvenient to store. However, it does not work, affects the appearance and operation, takes up more space and time, and seriously wastes resources.

The traditional case is relatively large in size and requires a power supply, so there are certain limitations in the actual use process. Therefore, this application proposes a sound-absorbing device for a pneumatic rock drill

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