CN112431986A

CN112431986A - Phonon crystal pipeline sound insulation device

Info

Publication number: CN112431986A
Application number: CN202011044929.6A
Authority: CN
Inventors: 张�杰
Original assignee: Gewu Zhensheng Beijing Technology Co ltd
Current assignee: Gewu Zhensheng Beijing Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-03-02

Abstract

The invention provides a phonon crystal pipeline sound insulation device. The device consists of three parts, namely base damping, an aerogel sound absorption layer and a phonon crystal sound insulation wrapping part. The sound insulation of the phononic crystal is wrapped and utilized the local coupling resonance principle of the phononic crystal, the steel latticed reinforcing ribs are welded on the steel shell, the vibration reduction damping blocks are filled in the grids, the sound insulation performance of the original steel shell can be changed, the sound insulation quantity is obviously improved for specific frequency, the noise reduction device is enabled to have frequency selection characteristics, and targeted noise reduction treatment can be carried out according to the noise characteristics of a noise source. The invention is suitable for sound insulation treatment of pipelines with narrow-frequency noise problems.

Description

Phonon crystal pipeline sound insulation device

Technical Field

The invention relates to a phonon crystal pipeline sound insulation device for sound insulation of a pipeline.

Background

Pipes such as water pipes and air pipes are often noisy. The common noise reduction treatment means for the pipeline is to wrap a sound insulation material on the outer side of the pipeline. Common sound insulation materials are limited by the mass law, and in order to pursue high sound insulation quantity, sound insulation packages are usually thickened and weighted. While for equipment such as ships, increasing weight is often not feasible. And the pipeline noise receives the influence of the inside fluid of pipeline, can appear generally taking the narrow-band noise to be the condition of giving first place to, uses thickening, aggravate sound insulation material this moment, and the sound insulation volume of the outstanding narrow-band noise of noise source often promotes not obviously, and this results in that the whole volume of making an uproar of falling of ordinary sound insulation material is not enough. Therefore, there is a need to provide a pipe sound insulation having frequency selective characteristics.

In order to solve the problems, the invention provides a phonon crystal pipeline sound insulation device.

Disclosure of Invention

The purpose of the invention is: a phononic crystal pipe sound-insulating device is provided, which has the frequency selective characteristic of high noise reduction in a certain frequency range.

The technical solution of the invention is as follows:

a phononic crystal pipeline sound insulation device is characterized by comprising a base layer damping layer, an aerogel sound absorption layer and a phononic crystal sound insulation wrapping layer;

the base layer damping is directly contacted with the pipeline to be denoised and is usually arranged on the pipeline to be denoised in an adhesive way;

the aerogel sound absorption layer is positioned on the outer side of the base layer damping;

the phononic crystal sound insulation wrapping is positioned on the outer side of the aerogel sound absorption and vibration reduction layer;

and the sound insulation felt with damping characteristics is used for damping of the base layer, and the sound insulation and vibration reduction effects are realized on the pipeline to be subjected to noise reduction.

Aerogel acoustic absorption layer uses high temperature resistant, has better sound absorption performance's aerogel material.

The phonon crystal sound insulation wrapping uses a local coupling resonance principle of the phonon crystal, steel latticed reinforcing ribs are welded on a steel shell, and vibration reduction damping blocks are filled in grids, so that the sound insulation performance of an original steel shell can be changed, the sound insulation quantity is obviously improved for specific frequency, and the noise reduction device has a frequency selection characteristic.

The effect is illustrated as follows: the pipeline noise is reduced in the full frequency band range through the base layer damping and the aerogel sound absorption layer; the sound insulation effect of a specific frequency band is improved through the local coupling resonance wrapped by the phononic crystal in sound insulation, so that the noise reduction device has the frequency selection characteristic; for the pipeline noise reduction project with prominent narrow-band noise, the device has the advantages of light weight and high comprehensive noise reduction quantity.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic view of a phononic crystal duct insulator according to an embodiment of the present invention;

the specific reference numbers in the figures are as follows:

1. sound insulation and wrapping of phonon crystals;

2. an aerogel sound absorption layer;

3. damping of a base layer;

4. a pipeline to be denoised;

FIG. 2 is a schematic plan view of a phononic crystal pipeline sound insulator according to an embodiment of the present invention;

the specific reference numbers in the figures are as follows:

1. sound insulation and wrapping of phonon crystals;

2. an aerogel sound absorption layer;

3. damping of a base layer;

FIG. 3 is a schematic diagram of a phononic crystal sound insulation wrapping of a phononic crystal pipeline sound insulation device according to an embodiment of the present invention;

the specific reference numbers in the figures are as follows:

1. a metal housing;

2. steel grid reinforcing ribs;

3. a vibration damping block;

FIG. 4 is a schematic unfolding plan view of a phonon crystal sound insulation wrapping surface of a phonon crystal pipeline sound insulation device according to an embodiment of the invention;

the specific reference numbers in the figures are as follows:

1. a metal housing;

2. steel grid reinforcing ribs;

3. a vibration damping block;

in the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of description and are not intended to limit the scope of the invention. Other variations or modifications may occur to those skilled in the art, based on the foregoing, and are still within the scope of the present invention.

Claims

1. A phononic crystal pipeline sound insulation device is characterized by comprising a base layer damping layer, an aerogel sound absorption layer and a phononic crystal sound insulation wrapping layer;

and the phononic crystal sound insulation wrapping layer is positioned on the outer side of the aerogel sound absorption vibration reduction layer.

2. The phononic crystal pipeline sound insulation device according to claim 1, wherein the base layer damping uses a sound insulation felt with damping characteristics to play a sound insulation and vibration damping role in a pipeline to be subjected to noise reduction.

3. The phononic crystal pipeline sound insulation device as claimed in claim 1, wherein the aerogel sound absorption layer is made of aerogel material with high temperature resistance and good sound absorption performance.

4. The phononic crystal pipeline sound insulation device of claim 1, wherein the phononic crystal sound insulation binding uses a local coupling resonance principle of a phononic crystal, steel latticed reinforcing ribs are welded on a steel shell, and vibration reduction damping blocks are filled in grids, so that the sound insulation performance of the original steel shell can be changed, the sound insulation quantity is obviously improved for specific frequency, and the noise reduction device has a frequency selection characteristic.