CN2455765Y - Improved acoustic screen - Google Patents

Abstract

The utility model relates to the improvement on an anti-noise acoustic insulation sound screen which is used in overhead frames, both sides of a road and construction sites. The utility model is characterized in that a sound insulation layer of the sound screen is a rectangular hollow glass shell body, a loosening sound insulation medium is filled in the sound insulation layer, and small holes are opened and distributed on a wall face at one side towards a sound source.

Description

A kind of improved sound barrier

Utility model is the improvement of noise control sound insulation sound barrier such as to take up around the building site to being used for overhead and ground level road two.

The traffic noise that urban road both sides vehicular traffic produces, the construction noise that the civic building construction produces, bring very big influence for people's work, life, and noise pollution brings harm also can for people's health, in some road both sides, be the obstruct noise around the especially elevated road both sides, and building site for this reason, often need to be provided with some sound insulation sound barriers, to reduce traffic and/or building noise to the interference of office or esidential building on every side.Chinese patent 98225265 disclosed a kind of sound insulation sound barriers, adopt the combination sound barrier of the hollow double-layer structure of foamed aluminium veneer or foamed aluminium board and backboard composition, this sound insulation sound barrier, lack effective sound absorption function, therefore defening effect is unsatisfactory, and the aluminium sheet cost is higher, and its oxide etch is used, and the life-span is affected in the open.The compound acoustic screen of Chinese patent 98241552 disclosed another kinds, then be to constitute the damping soundproof course by two layers of PVC air duct cloth, between the damping soundproof course, be provided with the block of glass wool absorbent treatment and form soft Composite sound insulation folding screen, or in the middle of two layers of damping soundproof course, fill and form three layers of composite bed absorbent treatment with adhesive bonds by block of glass wool absorbent treatment, PVC damping soundproof course and galvanized sheet soundproof course, form the hard Composite sound insulation folding screen, it is not long that this noise barrier is used for open-air application life yet.Therefore still having is worth improved place.

The purpose of utility model is to carry a kind of have simultaneously sound absorption and sound insulation function, and is and anti-interference effective, is difficult for agingly, and long service life can effectively intercept the sound barrier of noise.

The utility model purpose realizes, mainly is improved to sound barrier and adopts good weatherability and fine and close glass-reinforced plastic material to make the sound barrier housing, and the loose acoustic absorbing medium of interior filling is formed the complex sound barrier.Specifically, the utility model sound barrier by soundproof course with absorbent treatment is compound forms, is characterized in that said soundproof course is the rectangular hollow glass steel shell, in be filled with loose acoustic absorbing medium.Utility model adopts glass fiber reinforced plastic to make the sound barrier housing, and is fine and close because of it, thus have defening effect and antijamming capability preferably, and glass fiber reinforced plastic good weatherability, long service life in the open; In fill out loose sound absorption material, have acoustically effective preferably again, three layers of barrier of sound insulation one sound absorption, one sound insulation are formed in both actings in conjunction, have significantly improved the soundproof effect of sound barrier.Through experimental test, the preferable employing of utility model complex sound barrier thickness 100-200mm, wherein the monolateral wall thickness of glass steel shell is 3-10mm, all the other are filling sucting sound material.The described loose sound absorption material of utility model can be loose sound absorption materials such as rigid foam, sound absorption cotton (fiber), perlite, such as but not limited to as polyurethane foam, polystyrene, rock wool, alumina silicate fibre, glass fiber etc.For making it have defening effect preferably, reduce production costs again, utility model sound barrier glass steel shell better adopts the wall asymmetrical type housing of uniform thickness not, said asymmetric thick for sound barrier sound insulation face one side, one side is thin; the thick 3-5mm of thin-wall face; the thick 4-10mm of offside wall thickness face, and with sake towards intercepting sound source one side.

For further improving defening effect, the processing on the glass steel shell face that approaches towards sound source one side of utility model sound barrier is distributed with numerous apertures, the sound wave that helps not being reflected enters and is absorbed by sound absorption material, has improved the comprehensive defening effect of sound barrier so greatly.Small aperture with 5mm about for well, percent opening is better with 20-50%, adjusts small aperture and percent opening and glass steel shell wall thickness, can obtain best defening effect.

Below in conjunction with a non-limiting embodiment, further specify utility model.

Fig. 1 is an embodiment basic structure schematic diagram.

Fig. 2 is a housing thin-wall face open-celled structure schematic diagram.

Embodiment: at one-time formed thin-walled 3mm, heavy wall 7mm, long 4000mm, wide 170mm, high 400mm, the glass steel shell 1 of upper and lower opening is filled the thick rigid foam 2 of 160mm and is formed the sound absorption unit.And rule has the through hole 5 that the aperture is 5mm on thin-wall face, and percent opening is 30%.Be convenient group wall, sound absorption element thickness side is processed with respectively and patches groove 3 and tenon 4.During the assembling acoustic screen pegged graft mutually by concavo-convex tongue-and-groove in each sound absorption unit, and, fix by H shaped steel stud location with the sealing of mylar clay.

The described porosity acoustic absorbing medium of utility model can also be other sound absorption materials, as the cotton that absorbs sound (fiber), perlite etc.The connection of top and bottom also can be adopted and be connected similar concavo-convex grafting with the side.

Utility model is owing to adopt the glass fiber reinforced plastic of compactness height and good weatherability to make the sound barrier housing, in fill out loose sound absorption material, and adopt asymmetric wall thickness and meeting face perforate, its fine and close glass fiber reinforced plastic has sound insulation property preferably, sound absorption material has acoustically effective preferably again, and meet face perforate, part is passed produce between sound wave that aperture drops into and bulk material fiber channels and collaterals or the particle and rub, under the viscosity of air and heat-conduction effect effect, make acoustic energy be converted into heat energy and consume, thereby reduce the conduction noise.Therefore, not only whole defening effect of utility model and good weatherability, and also in light weight, simple in structure, cost is low, and one time compression moulding intensity is good, long service life, and can make various colors as required.Through acoustical testing, mean transmission loss: 28dB, average sound absorption coefficient 〉=0.6, maximum defluxion L/300, can reach 25-30 application life.Be particularly useful for road both sides such as speedway, high-speed railway, overhead railway, urban light rail and make the noise isolation sound barrier, also can be used for reducing urban construction and construction noise pollution, and also can make various cages and be used to isolate various industrial noise, water-tight corrosion-proof adds fire retardant and can also satisfy fire protection requirement.

Describe for convenient, the said acoustic absorbing medium of utility model, sound absorption material are synonym, and said voice is a synonym.

Claims (10)

1, a kind of sound insulation sound barrier by soundproof course with absorbent treatment is compound forms, is characterized in that said soundproof course is the rectangular hollow glass steel shell, in be filled with loose acoustic absorbing medium.

2, according to the described sound insulation sound barrier of claim 1, its spy is that the sound insulation of said glass fibre reinforced plastics casing faces the wall and meditates thick asymmetric.

3, according to the described sound insulation sound barrier of claim 2, its spy is the thick 3-5mm of said thin-wall face, the thick 4-10mm of offside wall thickness face.

4, according to claim 2 or 3 described sound insulation sound barriers, its spy is that said glass steel shell thin-wall face is arranged with perforation.

5, according to the described sound insulation sound barrier of claim 4, its spy is that said perforation is about 5mm.

6, according to the described sound insulation sound barrier of claim 4, its spy is that said percent opening is 20-50%.

7, according to the described sound insulation sound barrier of claim 1, its spy is that said acoustic absorbing medium is a rigid foam.

8, according to the described sound insulation sound barrier of claim 1, its spy is the thick 100-200mm of said sound barrier.

9, according to the described sound insulation sound barrier of claim 1, its spy is that there is the connection tongue-and-groove said glass steel shell thickness both sides.

10, according to the described sound insulation sound barrier of claim 1, its spy is said glass steel shell upper and lower opening.

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