How to design the sound insulation of the sound insulation cover of workshop assembly line?

Pipeline noise is the main noise source in assembly line workshop. During normal operation, the assembly line equipment will produce noise above 90 decibels, which will bring bad noise influence to the workshop environment and workshop workers. The sound insulation treatment method of pipeline is a limited means to control the noise source of pipeline workshop. After treatment and excluding other noise sources, the noise value of pipeline equipment at 1 m is less than 70 dB. Comply with the noise emission regulations of the workshop and meet the noise reduction requirements of the field staff and factory leaders.

Solution of pipeline noise

Background of pipeline sound insulation treatment project

The noise value of the existing assembly line workshop in a factory is high, and the measured noise value is 90-95 decibels, which has certain influence on the surrounding staff.

First, the pipeline noise reduction ideas:

1. Analyze the noise source of the assembly line, comprehensively deal with the noise source, and soundproof the whole production line;

2. Using sound absorption method, design a reasonable sound absorption device for the mechanical equipment in the noise elimination channel;

3. Others (such as damping and vibration isolation to reduce the vibration of solid sound generator).

Note: The noise and sound insulation room of pipeline should be designed according to the actual equipment requirements to meet the requirements of ventilation and heat dissipation, post-maintenance and workers' inspection of the equipment itself.

Second, the pipeline sound insulation treatment method

1, noise source

Pipeline noise is mainly emitted by pipeline equipment, and different production lines will produce different noises. Generally speaking, these noises are caused by mechanical noise, friction noise and motor noise. Using sound insulation room to isolate the noise equipment on the assembly line can effectively reduce the overall noise of the assembly line.

2. Sound insulation room

The assembly line soundproof room covers the noise equipment on the production line with composite sound insulation boards, which are spliced together in the form of jigsaw puzzle. At the same time, an access channel is reserved in the sound insulation room to ensure the access of materials and personnel. In order to avoid noise leakage in the entrance and exit channels, silencers should be installed at the entrance and exit.

3. Adding a soundproof cover to the assembly line to control the noise of the transmission path is a cost-effective treatment measure at present. Features: The sound insulation cover of the assembly line consists of chassis, frame, sound absorption and insulation screen, and air intake and exhaust muffler. The sound insulation cover body and the air inlet and exhaust muffler are of combined structure and can be disassembled and installed. Wherein the sound insulation cover body is divided into a front side and a rear side, the air inlet end has a double-door structure, and the exhaust end is provided with a manhole.

4. Special requirements (automatic doors, emergency switches, explosion-proof lights and other accessories can be opened according to production requirements);

5. For other requirements, such as high vibration and noise of interlayer and high noise intensity, sound insulation and shock absorption measures can be added according to the actual situation.

Third, the effect of each processing method on the assembly line.

After the sound insulation treatment of the assembly line, the noise value of the assembly line workshop is lower than 75 decibels, which conforms to the relevant provisions of the Code for Design of Noise Control in Industrial Enterprises, provides a good production and working environment for workers, and reduces or does not affect the normal life of nearby residents.

The sound insulation room of the assembly line should be determined according to the field conditions, and corresponding methods should be taken to isolate the noise source and ensure the normal operation of the assembly line.