CN112628485B

CN112628485B - Pipeline noise reduction device based on vacuum auxiliary layer

Info

Publication number: CN112628485B
Application number: CN201910948577.8A
Authority: CN
Inventors: 赵盛; 于金宁; 孙迪; 武珊珊; 苏爽; 马岩; 张昌运
Original assignee: Sinopec National Petrochemical Project Risk Assessment Technology Center Co ltd; China Petroleum and Chemical Corp; Sinopec Safety Engineering Research Institute Co Ltd
Current assignee: Sinopec National Petrochemical Project Risk Assessment Technology Center Co ltd; China Petroleum and Chemical Corp; Sinopec Safety Engineering Research Institute Co Ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2023-01-13
Anticipated expiration: 2039-10-08
Also published as: CN112628485A

Abstract

The invention discloses a pipeline noise reduction device based on a vacuum auxiliary layer, which comprises a damping layer, a sound absorption layer and a vacuum layer, wherein the damping layer, the sound absorption layer and the vacuum layer are sequentially attached to the outer wall of a pipeline; the device has simple structure and good universality, and is suitable for standardization and batch production.

Description

Pipeline noise reduction device based on vacuum auxiliary layer

Technical Field

The invention relates to a pipeline noise reduction device, in particular to a pipeline noise reduction device based on a vacuum auxiliary layer.

Background

Noise is a common risk factor for occupational hearing impairment, and prolonged exposure to high noise can lead to noise deafness. Various medium pipelines of chemical enterprises are various in types and relatively dense in layout, and parts of pipelines are large in pipe diameter, high in flow speed and large in flow, so that roaring sound is formed in a working environment region, and occupational health of workers is seriously affected. In the pipeline noise treatment process, the following problems exist:

(1) The traditional pipeline binding method adopts composite materials such as sound absorption and sound insulation to prepare and structurally combine according to the decibel number of noise and the frequency of the noise, and can meet the conventional requirements of sound insulation, noise elimination and the like. However, for a part of high-noise pipelines with large pipe diameter, high flow velocity and large flow (especially with sound pressure level >115dB (a)), the noise reduction effect is not good, and the requirement of standard specifications on worker noise contact level cannot be met.

(2) In the same working area, pipelines with various media and various conveying pressures are arranged in a crossed manner, the noise spectrum characteristics are very complex, stable and unstable, the medium-high frequency is mainly used, and the medium-low frequency is mainly used. The traditional pipeline binding noise reduction method has obvious effect on middle and high frequency steady-state noise, but has poor noise control effect on middle and low frequency spectrum characteristics.

Disclosure of Invention

In order to solve the technical problems, the invention provides a pipeline noise reduction device based on a vacuum auxiliary layer, so as to achieve the purposes of solving the noise pollution problem of a full-band high-noise pipeline, reducing the noise exposure level and effectively reducing occupational health damage caused by high noise.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a device of making an uproar falls in pipeline based on vacuum auxiliary layer, includes attached in proper order in damping layer, acoustic absorption layer and the vacuum layer of pipeline outer wall, the vacuum layer is by front plate, back splint and set up the vacuum region that the sound bridge between front plate and back splint encloses, set up the vacuum valve on the back splint.

In the scheme, the rear clamping plate is provided with the vacuum gauge.

In the scheme, the damping layer is made of an EVA-based graphene high-damping material, and the thickness of the damping layer is 8-15mm.

In a further technical scheme, the thickness of the damping layer is 10mm.

In the scheme, the sound absorption layer is made of porous sound absorption materials, and the thickness of the sound absorption layer is 8-15mm.

In a further technical scheme, the thickness of the sound absorption layer is 12mm.

In the above scheme, the acoustic bridge is a plurality of columnar structures of connecting front splint and back splint, acoustic bridge evenly distributed is between front splint and back splint.

In a further technical scheme, the sound bridge is distributed in a square shape, a triangular shape, a honeycomb shape, a diamond shape or a pentagonal shape.

In the scheme, the front clamping plate and the rear clamping plate are made of thin plate materials, and the rigidity value of the panel is larger than that of glass.

In the scheme, the vacuum degree of the vacuum layer is not more than 0.5 atmospheric pressure.

According to the technical scheme, the pipeline noise reduction device based on the vacuum auxiliary layer is used for insulating medium and low frequency noise by the vacuum layer, and insulating the medium and high frequency band noise by the sound absorption layer and the damping layer, so that the noise of all the low, medium and high frequency bands can be effectively isolated, and a good protection effect is achieved for workers. The device has simple structure and good universality, and is suitable for standardization and batch production.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic view of a vacuum auxiliary layer-based pipe noise reduction device according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the distribution of the acoustic bridge according to the embodiment of the present invention.

In the figure, 1, a damping layer; 2. a sound absorbing layer; 3. a vacuum layer; 4. a front splint; 5. a rear splint; 6. an acoustic bridge; 7. a vacuum gauge; 8. and a vacuum valve.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The invention provides a pipeline noise reduction device based on a vacuum auxiliary layer, which has the structure shown in figure 1, solves the problem of noise pollution of a full-band high-noise pipeline, reduces the noise exposure level of workers, and effectively lightens occupational health damage caused by high noise.

The pipeline noise reduction device based on the vacuum auxiliary layer as shown in fig. 1 comprises a damping layer 1, a sound absorption layer 2 and a vacuum layer 3 which are sequentially attached to the outer wall of a pipeline, wherein the vacuum layer 3 can be externally fixed by a binding tape or a hose clamp.

In this embodiment, the damping layer 1 is an EVA-based graphene high damping material, and has a thickness of 10mm. The damping layer 1 is fixed on the outer wall of the pipeline in a mode of smearing or pasting damping materials and is used for weakening the noise transmission sound intensity of a low-frequency resonance area and a high-frequency anastomosis area of the pipeline.

The sound absorption layer 2 is made of porous sound absorption materials, has the thickness of 12mm, has the characteristics of corrosion resistance, high temperature resistance, small volume weight and the like, and is used for sound absorption control of the noise in the medium-high frequency region.

The vacuum layer 3 is formed by a front clamping plate 4, a sound bridge 6 and a rear clamping plate 5 which are adhered to the sound absorption layer 2 to form a vacuum structure. The rear clamping plate 5 is provided with a vacuum gauge 7 and a vacuum valve 8. The vacuum pump is started first and then the vacuum valve 8 is started, when the vacuum gauge 7 displays that the pressure is less than 0.5 atmosphere, the cavity of the vacuum layer 3 meets the vacuum requirement, and then the vacuum valve 8 and the vacuum pump are closed.

As shown in fig. 2, the acoustic bridges 6 are a plurality of columnar structures connecting the front plate 4 and the rear plate 5, and are supporting objects in the vacuum layer 3, and the acoustic bridges 6 are uniformly distributed between the front plate 4 and the rear plate 5. The sound bridges 6 are distributed in the shape of a square, a triangle, a honeycomb, a diamond or a pentagon. Through test and comparative analysis, the stress and deformation of the square distribution are small, the number of required sound bridges is minimum, the theoretical sound insulation quantity is maximum, and the method is the best choice.

The front clamping plate 4 and the rear clamping plate 5 are made of thin plate materials, the mechanical property of the thin plate materials is required to be slightly changed, and the rigidity value of the panel is larger than that of glass. Meanwhile, according to the main frequency band of noise reduction, a corresponding high-rigidity or high-density panel material is selected to improve the sound insulation performance of the vacuum layer on medium and low frequency noise.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pipeline noise reduction device based on a vacuum auxiliary layer is characterized by comprising a damping layer, a sound absorption layer and a vacuum layer which are sequentially attached to the outer wall of a pipeline, wherein the vacuum layer is a vacuum area which is formed by a front clamping plate, a rear clamping plate and an acoustic bridge arranged between the front clamping plate and the rear clamping plate, and a vacuum valve is arranged on the rear clamping plate;

the sound bridge is of a plurality of columnar structures which are connected with the front clamping plate and the rear clamping plate, and the sound bridge is uniformly distributed between the front clamping plate and the rear clamping plate; the shape of the distribution of the acoustic bridges is square.

2. The vacuum assisted layer-based pipe noise reduction device according to claim 1, wherein a vacuum gauge is arranged on the rear clamping plate.

3. The vacuum auxiliary layer-based pipeline noise reduction device according to claim 1, wherein the damping layer is an EVA-based graphene high damping material and has a thickness of 8-15mm.

4. The vacuum assisted layer-based pipe noise reducer of claim 3, wherein the damping layer has a thickness of 10mm.

5. The pipe noise reduction device based on the vacuum auxiliary layer as claimed in claim 1, wherein the sound absorption layer is made of porous sound absorption material and has a thickness of 8-15mm.

6. The vacuum assisted layer-based pipe noise reducer of claim 5, wherein the sound absorbing layer has a thickness of 12mm.

7. The vacuum assisted layer-based pipe noise reducer of claim 1, wherein the front clamping plate and the rear clamping plate are made of thin plate materials, and the rigidity value of the panel is larger than that of glass.

8. The vacuum assisted layer-based pipe noise reduction device according to claim 1, wherein the vacuum degree of the vacuum layer is not more than 0.5 atmosphere.