How to control the noise of pump house in residential area

Pump house is an important function of urban buildings. Rooms are generally located in the basement, and the acoustic environment on the first to third floors above them is easily affected if there is no good noise reduction treatment. Accordingly, the demand to reduce the noise of pump room is increasingly prominent.

Noise control measures of pump house

The noise of the water pump room mainly comes from refrigerators, motors and fans. During the operation of the pump, the vibration of the shell and motor is transmitted to the building structure in the form of elastic waves through the foundation, pipe rack and so on. , and through the building structure to the surrounding air. Its noise is concentrated in the middle and low frequency bands, and it has strong diffraction ability and is not easy to be attenuated. In addition, the acoustic energy density in the machine room is high, and the measured value of outdoor transmission noise is high. At present, noise is mainly reduced by blocking the vibration source and cutting off the propagation path.

Noise reduction treatment of water pump room

Noise reduction measures of pump house;

1, the building structure in the water pump room was reformed, and sound-absorbing and heat-insulating boards were installed on the surrounding walls and the top of the machine room and fixed with light steel keel; The holes between the computer room and other rooms are tightly sealed to avoid air transmission; Ensure the air tightness of the doors and windows of the computer room.

2. The water pump is equipped with a sound insulation cover with an exhaust fan to ensure ventilation of the equipment. At the same time, noise elimination equipment is installed at the entrance and exit of the sound insulation cover.

3. Install a vibration isolation platform at the bottom of the water pump to reduce the vibration of the foundation and isolate the vibration source generated when the water pump works. At the same time, the supporting pipes in the pump room should be equipped with vibration isolation elastic supports and hangers and soft connections to minimize noise transmission.

4. Air acoustic treatment

It is easier to control the noise of water pump by air sound insulation. The air noise generated by the water pump is generally less than 85dB(A), and there is at least one floor high between the water pump room and the residential room. Generally, the sound insulation of 120mm cast-in-place concrete is more than 52dB, which is quite beneficial for isolating the air sound of water pump. But now the country has strict requirements on the residents' environment in room acoustics, so if the pump room is only one floor away from the residents, special sound insulation treatment is needed. Common methods include adding sound insulation cover, sound insulation ceiling and indoor sound absorption.

5. System vibration isolation

Vibration isolators are generally used for vibration isolation of water pump systems. If the pump vibrates strongly, floating ground is preferred, because floating ground has better vibration reduction effect and wider frequency band.

6, pipeline vibration isolation treatment

Add (replace) rubber soft connection to the water outlet of water pump. Generally, the length of soft connection is short and the elasticity is poor, which leads to the unsatisfactory overall vibration isolation effect, and the vibration isolation effect will be improved obviously after replacement. Soft connection should choose professional vibration isolation products with good vibration isolation performance, long length and corrosion resistance.

7. Pipe supports shall be treated for vibration reduction.

Generally, the connection between the pipeline support and the ground is hard, which leads to the transmission of pipeline vibration to the building structure. The vibration reduction treatment under the bracket can better prevent the vibration energy from transmitting to the building structure.

8, pipe wall treatment

Generally, the pipeline and the wall are hard connected, and a considerable part of the energy of pipeline vibration is transmitted to the building structure, so the pipeline and the wall should be separated to prevent energy transmission.

9, pipeline damping sound-proof bandage

The pipeline vibrates loudly, and the vibrating air sound will also affect residents. Therefore, it is necessary to comprehensively damp and soundproof the pipeline, which can reduce the vibration of the pipeline on the one hand and isolate the air sound on the other.