CN216074827U - Ventilation and noise elimination device embedded in sound barrier - Google Patents
Ventilation and noise elimination device embedded in sound barrier Download PDFInfo
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- CN216074827U CN216074827U CN202122544763.0U CN202122544763U CN216074827U CN 216074827 U CN216074827 U CN 216074827U CN 202122544763 U CN202122544763 U CN 202122544763U CN 216074827 U CN216074827 U CN 216074827U
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Abstract
The utility model discloses a ventilation noise elimination device embedded in a sound barrier, which is characterized in that the sound barrier is internally provided with a noise elimination device consisting of a plurality of straight plate type noise elimination sheets and arc type noise elimination sheets, a shutter arranged corresponding to a lower vent of the noise elimination device is arranged below the sound barrier, the top of the noise elimination device is provided with an upper vent, the lower part of the noise elimination device is provided with a ventilation noise elimination channel of a lower vent in the horizontal direction, the lower vent is arranged on the shutter below the sound barrier, and a sound insulation sound absorption plate and the sound barrier form an enclosure structure of the ventilation noise elimination channel. Compared with the prior art, the utility model has good noise reduction and decoration effects, the whole device is embedded in the sound barrier, has no exposed part, simple structure, convenient manufacture and installation and small ventilation resistance, effectively solves the problem of noise reduction performance loss caused by the ventilation of the sound barrier, has good economy and decoration, and can be widely applied to the sound barrier engineering with noise control requirements.
Description
Technical Field
The utility model relates to the technical field of ventilation and noise elimination, in particular to a ventilation and noise elimination device embedded in a sound barrier.
Background
The sound barrier is widely applied to the technical field of environmental protection as a common noise reduction facility, and has the characteristics of small occupied area, convenience in implementation, good economy and the like besides a good noise reduction effect. In terms of noise reduction technology, the sound barrier belongs to noise reduction means of sound insulation, and is mainly used for blocking direct sound transmission of a noise source and obtaining a quieter environment in an acoustic shadow area. Thus, the sound barrier must achieve good noise reduction, above all by ensuring that no holes are visible through the entire facade of the sound barrier. When the sound barrier is applied to places with ventilation requirements, a vent needs to be arranged on the sound barrier, noise can be leaked at the vent, the noise reduction effect of the sound barrier is greatly reduced, and the ventilation noise eliminator is needed to be used in order to take ventilation and noise reduction into consideration.
The ventilation noise elimination device in the prior art mainly comprises a noise elimination shutter and a plate type noise eliminator, wherein the noise elimination shutter has the advantages of thin thickness, high noise elimination amount per unit length, proper decorative performance of an outer vertical surface, large resistance and high manufacturing cost; the sheet type silencer has the advantages of low resistance and the disadvantages of low noise elimination quantity per unit length, large occupied area and poor decoration effect. Therefore, the noise elimination and noise reduction device is not suitable for a sound barrier, and needs to be developed, wherein the noise elimination and noise reduction device has the advantages of high noise elimination and noise reduction effects, good economy and decoration, small occupied area and moderate resistance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to design a ventilation noise-abatement device embedded in a sound barrier aiming at the defects of the prior art, and adopts a method for embedding the ventilation noise-abatement device in the sound barrier, a ventilation noise-abatement channel forms a surrounding structure by a sound insulation and sound absorption plate and the sound barrier together, an aluminum alloy shutter is arranged outside a lower ventilation opening of the ventilation noise-abatement device, and forms a complete external vertical surface with a sound insulation and sound absorption screen body of the sound barrier, so that the ventilation noise-abatement device has a better decorative effect.
The purpose of the utility model is realized as follows: a ventilation noise eliminator embedded in a sound barrier comprises the sound barrier arranged on a concrete foundation, and is characterized in that the sound barrier is internally provided with a noise eliminator consisting of a plurality of straight plate type noise elimination sheets and arc type noise elimination sheets, a shutter arranged corresponding to a lower vent of the noise eliminator is arranged below the sound barrier, and the straight plate type noise elimination sheets and the arc type noise elimination sheets are vertically and alternately arranged in a frame formed by welding a steel upright post and a transverse purlin to form a ventilation noise elimination channel with an upper vent at the top and a lower vent in the horizontal direction; the upper vent and the lower vent are vertically arranged; the arc-shaped silencing sheet is vertically arranged in the silencing device, and the arc-shaped sheet faces the lower vent; the sound-proof device is arranged in the sound barrier and is fixed on a concrete foundation by a steel upright post, a lower ventilation opening of the sound-proof device is arranged on a shutter below the sound barrier, and a surrounding structure of a ventilation and sound-proof channel is formed by the sound-proof and sound-absorbing board and the sound barrier.
The straight-plate type silencing piece and the arc-shaped silencing piece adopt an aluminum perforated plate as a protective panel, and are filled with moistureproof centrifugal glass wool coated by hydrophobic glass wool cloth, the thickness of the arc-shaped silencing piece is 100mm, and the thickness of the straight-plate type silencing piece is 50 mm.
The sound insulation and absorption plate is composed of a steel plate on the outer side and an aluminum perforated plate on the inner side, the interior of the sound insulation and absorption plate is filled with moisture-proof centrifugal glass wool wrapped by hydrophobic glass fiber cloth, and the thickness of the sound insulation and absorption plate is 80-100 mm.
Compared with the prior art, the utility model has good noise reduction and decoration effects, the whole device is embedded in the sound barrier, has no exposed part, simple structure, convenient manufacture and installation and small ventilation resistance, effectively solves the problem of noise reduction performance loss caused by the ventilation of the sound barrier, has good economy and decoration, and can be widely applied to the sound barrier engineering with noise control requirements.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the outside elevation of the present invention;
fig. 3 is a schematic view of the frame structure of the ventilation muffler device.
Detailed Description
Referring to the attached drawings 1-2, the utility model comprises a sound barrier 1 arranged on a concrete foundation 4 and a silencing device 5 arranged in the sound barrier 1, wherein the silencing device 5 comprises a plurality of straight plate type silencing pieces 8 and arc type silencing pieces 9 which are alternately arranged; the straight-plate type noise reduction sheets 8 and the arc type noise reduction sheets 9 are arranged in parallel in a rectangular frame formed by welding the steel upright posts 3 and the transverse purlines 7; the bottom of the sound barrier 1 is provided with a square hole, and an aluminum alloy shutter 2 is arranged outside the hole; the concrete foundation 4 is connected with a rectangular frame structure consisting of steel upright posts 3 and transverse purlines 7 by expansion bolts, a plurality of straight plate type silencing pieces 8 and a plurality of arc type silencing pieces 9 are arranged in the frame in parallel to form silencing channels, and the top and the lower part of each silencing channel are respectively provided with an upper vent 10 and a lower vent 11 which are vertical to each other; the lower ventilation openings 11 are arranged in the horizontal direction and embedded and installed at the inner sides of the square holes formed in the bottom of the sound barrier 1; sound insulation and absorption plates 6 are arranged on three side surfaces outside a rectangular frame structure consisting of the steel upright posts 3 and the transverse purlines 7; the sound insulation and absorption plate 6 and the sound barrier 1 form an enclosure structure of the silencing device 5 together.
The straight plate type silencing pieces 8 and the arc type silencing pieces 9 both adopt aluminum perforated plates as protective panels, and are internally filled with moistureproof centrifugal glass wool coated by hydrophobic glass fiber cloth; the thickness of the arc-shaped silencing sheet 9 is 100 mm; the thickness of the straight-plate type silencing sheet 8 is 50 mm.
The thickness of the sound insulation and absorption plate 6 is 80-100 mm, the outer side is a steel plate, the inner side is an aluminum perforated plate, and the interior is filled with moisture-proof centrifugal glass wool wrapped by hydrophobic glass fiber cloth.
Referring to the attached drawing 3, the upper part of the concrete foundation 4 is provided with steel upright posts 3 by adopting expansion bolts, and a rectangular frame structure is formed by welding transverse purlins 7 between the adjacent steel upright posts 3.
The silencing sheet is designed into a structural form of circular arc type and straight plate type interval arrangement, so that the whole silencing device is formed by connecting two silencing devices of a silencing elbow and a straight pipe silencer in series, namely the circular arc type silencing sheet 9 plays a role of the silencing elbow, and the straight plate type silencing sheet 8 plays a role of the straight pipe plate type silencer, so that the noise reduction amount is obviously improved, and higher noise reduction performance is realized. The silencing channel is internally provided with four section sudden changes, which is equivalent to the addition of four small resistant silencing sections, is favorable for improving the silencing quantity of medium and low frequencies, improves the condition that the resistive silencer has low silencing effect at the medium and low frequencies, and is favorable for improving the integral silencing and noise reducing effect of the whole silencing device.
The utility model improves the effective flow area ratio of the ventilation noise eliminator, which is one of the main ways of reducing the engineering investment, increases the effective flow area ratio, enlarges the effective flow area of a unit area, and reduces the number of noise reducers under the condition of meeting the same ventilation quantity, thereby saving the investment. Generally, the effective flow area ratio of the ventilation and noise elimination shutter is 30-45%, and the effective flow area ratio of the straight pipe silencer is 40-55%. According to the utility model, two sections of silencing devices are connected in series, so that the sheet spacing ratio of the traditional resistive silencer is improved to 1: 1.8-1: 3.6 from 1: 1-1: 1.5 (the thickness of the silencing sheet: the width of a silencing channel). The technology that the thick and thin silencing pieces are arranged at intervals is adopted, the area of a channel in the device is further enlarged, the effective flow area ratio of the whole noise reduction device is larger than 65%, and the engineering investment cost can be obviously reduced. In addition, the screen body and the concrete foundation 4 of the sound barrier 1 are used as a part of the shell of the silencer device 5, and the support upright posts and the inclined struts of the sound barrier 1 can also be used as a part of the support framework of the silencer, so that the steel consumption of the frame structure of the silencer device 5 is greatly reduced, and the investment cost is further reduced. All the materials in the device are steel plates, glass wool plates, aluminum plates and other common building materials, and the investment cost of the device can be controlled within a reasonable limit. The outer part of a lower vent 11 of the noise eliminator is an aluminum alloy shutter 2, and the lower vent and a sound insulation and absorption screen body of the sound barrier 1 form a complete vertical surface, so that the noise eliminator has a good decorative effect, and the whole noise eliminator is embedded in the sound barrier 1 and has no exposed part. The resistance is reduced by adopting the arc-shaped silencing piece 9, the calculated pressure loss value is lower than 18Pa under the condition that the average wind speed in the channel is lower than 3m/s, and the pressure loss value of the ventilation silencing shutter is usually larger than 20Pa, namely the pressure loss of the silencing device is superior to that of the ventilation silencing shutter.
The utility model is further described and not intended to be limited to the embodiments disclosed herein, but rather to include all equivalent embodiments within the scope of the claims.
Claims (3)
1. A ventilation noise eliminator embedded in a sound barrier comprises the sound barrier (1) arranged on a concrete foundation (4), and is characterized in that a noise eliminator (5) consisting of a plurality of straight plate type noise elimination sheets (8) and arc type noise elimination sheets (9) is arranged in the sound barrier (1), a shutter (2) arranged corresponding to a lower vent (11) of the noise eliminator (5) is arranged below the sound barrier (1), the straight plate type noise elimination sheets (8) and the arc type noise elimination sheets (9) are vertically and alternately arranged in a frame formed by welding a steel upright post (3) and a transverse purline (7), so that an upper vent (10) is formed at the top, and a ventilation noise elimination channel with the lower vent (11) is arranged in the horizontal direction at the lower part; the upper ventilation opening (10) and the lower ventilation opening (11) are vertically arranged; the arc-shaped silencing sheet (9) is vertically arranged in the silencing device (5), and the arc sheet faces the lower vent (11); the sound-absorbing device (5) is arranged in the sound barrier (1) and is fixed on the concrete foundation (4) through the steel upright posts (3), the lower ventilation openings (11) of the sound-absorbing device (5) are arranged on the shutter (2) below the sound barrier (1), and the sound-insulating sound-absorbing plate (6) and the sound barrier (1) form an enclosing structure of a ventilation and sound-absorbing channel.
2. The ventilation and noise elimination device embedded in the sound barrier of claim 1, wherein the straight plate type noise elimination sheet (8) and the circular arc type noise elimination sheet (9) adopt an aluminum perforated plate as a protective plate, and moisture-proof centrifugal glass wool coated by hydrophobic glass wool cloth is filled in the aluminum perforated plate.
3. The ventilation and noise elimination device embedded in the sound barrier of claim 1, wherein the sound insulation and absorption plate (6) is composed of an outer steel plate and an inner aluminum perforated plate, and the interior of the sound insulation and absorption plate is filled with moisture-proof centrifugal glass wool wrapped by hydrophobic glass fiber cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122544763.0U CN216074827U (en) | 2021-10-22 | 2021-10-22 | Ventilation and noise elimination device embedded in sound barrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122544763.0U CN216074827U (en) | 2021-10-22 | 2021-10-22 | Ventilation and noise elimination device embedded in sound barrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216074827U true CN216074827U (en) | 2022-03-18 |
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ID=80640504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122544763.0U Active CN216074827U (en) | 2021-10-22 | 2021-10-22 | Ventilation and noise elimination device embedded in sound barrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216074827U (en) |
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2021
- 2021-10-22 CN CN202122544763.0U patent/CN216074827U/en active Active
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