JP2001254322A - Soundproof wall having photo-catalytic function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound shielding wall which can be easily attached on the job site by using a lightweight soundproof panel, has a good sound shielding property with a simple configuration as well s NOx, SOx removing effect from exhaust gas with excellent persistency without requiring periodic maintenance, and also permitting to see the outside scenery by the driver and passengers by improving the transparency through a transparent synthetic resin panel installed to a soundproof board. SOLUTION: As a configuration of the soundproof panel, a permeable honeycomb- shaped metal plate is jointed to the front surface of soundproof members, a metal frame is attached as a reinforcing member thereby forming a soundproof panel. With respect to the soundproof panel requiring transparency, a permeable synthetic resin board and a permeable honeycomb-shaped metal plate is jointed on the transparent synthetic resin board and on its front surface, a metal frame is attached as a reinforcing member thereby forming a soundproof panel. To the permeable honeycomb-shaped metal plate, the titanium oxide is adhered and a photocatalytic active layer is formed by adhering on a permeable honeycomb-shaped metal plate, NOx and SOx in the exhaust gas is contacted to the photo catalytic active layer and oxidized by utilizing a honeycomb-shaped large surface area and fixed as HNO3, H2SO4 by the moisture existing in air or rainfall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulating wall provided with a photocatalytically active layer, having transparency, and being optimal for removing nitrogen oxides and the like contained in exhaust gas.

[0002]

2. Description of the Related Art In recent years, nitrogen oxides (N
Ox) and sulfur oxides (SOx) have been pointed out as one of the causes of high-concentration pollution, such as suppression of air diffusion by roadside buildings and an increase in the number of vehicles. In order to improve the atmospheric environment along roadsides, At present, only roadside measures are being considered, along with road structure measures such as the development of green belts and elevated structures that have already been considered. Adsorbents with a large surface area, such as activated carbon and cement, are being studied for their collection and removal methods. However, in the method based on adsorption recovery, it is necessary to replace the adsorbent when the adsorbent is saturated, and periodic maintenance is required.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple structure, good sound insulation, NOx, S
It has excellent Ox removal effect and its sustainability, does not require regular maintenance, and uses a transparent synthetic resin plate for the soundproofing board to improve the transparency, so that drivers and passengers can see the scene outside the soundproofing wall. I can do it. It is an object of the present invention to provide a sound insulating wall that can be easily installed on site by reducing the weight of the sound insulating panel.

[0004]

The soundproof panel is constructed by joining a sound-absorbing material and a transparent honeycomb-shaped metal plate on the front surface of the sound-absorbing material, and attaching a metal frame as a reinforcing material. As for the soundproof panel which requires transparency, a transparent synthetic resin plate and a transparent honeycomb-shaped metal plate are joined to the front surface thereof, and a metal frame as a reinforcing material is attached to form a soundproof panel. Titanium oxide is attached to the transparent honeycomb-shaped metal plate to create a photocatalytic active layer,
NOx and SOx in the exhaust gas are oxidized by contact with the photocatalytic active layer at a contact ratio utilizing the large surface area of the honeycomb, and are oxidized by the moisture and rain existing in the air.
It is fixed as NO ₃ and H ₂ SO ₄ .

[0005]

The air passing through the transparent honeycomb-shaped metal plate hits the sound absorbing material or the sound insulating material, and the bounced air again hits the transparent honeycomb-shaped metal plate. By repeating this process, the contact ratio between the sound absorbing material / sound insulating material and the sound insulating panel formed of the permeable honeycomb metal plate is increased, so that the purification of NOx and SOx in the exhaust gas per 1 m ² per hour has a great effect. I can do it. With a simple structure, good sound insulation, excellent NOx and SOx removal effect in exhaust gas and its sustainability, no need for regular maintenance,
In addition, a transparent synthetic resin plate or the like is used for the soundproofing plate to improve the transparency, so that the driver and the passenger can see the scene outside the soundproofing wall.
It is an object of the present invention to provide a sound insulating wall that can be easily installed on site by reducing the weight of the sound insulating panel.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a soundproof wall having a photocatalytic function.

[Explanation of symbols]

 Reference Signs List 1 sound-absorbing material / sound-insulating material 2 transparent honeycomb-shaped metal plate photocatalytic active layer 3 metallic frame

Claims (3)

[Claims] 1. JI at least as a sound absorbing material or a sound insulating material
S A1409 << Sound absorption coefficient >> 0.1 at a reference value of 1 KHz.
8 or more, JIS A1416 << transmission loss >> standard value 1KH
A sound-insulating wall comprising a sound-absorbing material or sound-insulating material having a thickness of 30 db or more in z and a transparent honeycomb-shaped metal plate provided with a photocatalytic active layer containing titanium oxide on at least one surface. 2. A sound-insulating wall comprising a transparent synthetic resin plate and a transparent honeycomb-shaped metal plate provided with a photocatalytic active layer containing titanium oxide on at least one surface. 3. A three-dimensional honeycomb is formed by polymerizing a transparent honeycomb-shaped metal plate having a photocatalytic active layer containing titanium oxide on at least one side, and is joined to a sound absorbing material or a sound insulating material to have a large contact ratio. Sound insulation wall.