A sound insulation device for flow-induced noise

A noise reduction device and noise-inducing technology, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve problems such as interference, resonance, frequency conversion, etc., and achieve the effect of small measurement interference, small size, and reliable sound insulation

Active Publication Date: 2014-10-29
JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a sound insulation and noise reduction device for measuring the characteristics of the flow-induced noise sound source, so as to solve the problems of interference, resonance and frequency conversion of the flow noise of the downstream devices of the water circulation system (turbine flowmeter, valve) to be measured, Accurate measurement of sound source characteristics

Method used

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  • A sound insulation device for flow-induced noise
  • A sound insulation device for flow-induced noise
  • A sound insulation device for flow-induced noise

Examples

Experimental program
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Effect test

Embodiment Construction

[0013] The test pump (15) runs to pump water out of the pool (13), and then flows into the pool (13) again after passing through the sound insulation and muffler tank (10), the turbine flow meter (11) and the gate valve (12). The air outlet (3) can adjust the height of the air column to avoid strong vibration of the system under a certain gas fraction. The inlet pipe (1) and the outlet pipe (2) are made into movable flange pipes. The holes of the multi-layer board (5) are uniformly distributed in a regular triangle in a circular area with a radius R, and the height h of the triangle is calculated from the number of holes. The holes between the two layers are staggered at an angle of 5-10°. The noise generated by the test pump (15) is separated from the noise generated by the turbine flowmeter (11) and the gate valve (12) by the sound insulation and anechoic tank (10), ensuring that the acoustic signal measured by the hydrophone (9) is the test generated by the pump (15).

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Abstract

The invention discloses a flow induction noise isolating and muffling device, relates to the field of noise control, and in particular relates to an isolation device for two flow water noise sources. The flow induction noise isolating and muffling device comprises an inlet pipe (1), an outlet pipe (2), an air exhaust port (3), a pot body (4) and a multipore plate (5). An interference muffling technology, a variable-frequency attenuation muffling technology and a multipore noise absorption technology are comprehensively used, so that mutual interference between the two noise sources is isolated; and aiming at a multi-frequency noise muffling situation, a good noise reduction effect is achieved. The flow induction noise isolating and muffling device is high in muffling and noise isolation performance, is convenient to process and has a small volume.

Description

technical field [0001] The invention is a noise elimination and sound insulation device, which is suitable for the measurement and research of the sound source characteristics in the water circulation system, and especially refers to a device for isolating noise interference from other components in the system when studying the flow noise sound source characteristics of a certain device in the system. Background technique [0002] In the pipeline system noise control technology, accurate measurement of the sound source characteristics of each component is the key to realize the "quiet" design of the entire pipeline system. Taking the pump flow-induced noise measurement system as an example, it is generally composed of pumps, pipelines, turbine flowmeters, valves and other components. The flow noise signal measured at the outlet of the pump is the synthesis of pump noise and noise from other parts of the system, eliminating the need for turbine flow The influence of meter and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L55/033G01H17/00
Inventor 司乔瑞袁寿其袁建平王川裴吉
Owner JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH
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