CN2658898Y - Magnesite foam sound absorbing board - Google Patents

Abstract

The utility model relates to a magnesite foam noise barrier which takes the magnesite foam board with polymer as the base board, which is full of a plurality of small blow holes. Punch holes and grooves of certain quantity and shapes are arranged on the acoustic side of the base board. The punch holes and grooves, communicating with the blow holes inside of the base board, enlarge the contact area of blow holes and the air. With excellent acoustic performance, such boards might be applied to outdoor sound absorbing facilities, having the advantages of light weight, high strength, weather resistance, lower cost, high-strength and construction with cement mortar.

Description

Magnesite foam acoustic board

The utility model relates to a kind of magnesite foam acoustic board, is used for open-air noise reduction facility such as highway, railway, industry, belongs to the environmental protection field of noise abatement.

Noise problem has been people's growing interest.Facts have proved, build sound barrier between highway, railway and sensitizing range, seriously locate to install acoustic absorbant in noise pollution, alleviate noise pollution with control, this is the main mode that reduces noise at present.

So far do not have gratifying, cheap and good-quality open-air sqouynd absorption lowering noise technology temporarily in China, just be that mainly acoustics, intensity, price, the application property of acoustic absorbant can not obtain well unified.Existing soft loose class acoustic absorbant; as rock wool, glass wool, polyfoam etc.; not weather-proof in the majority; and the technical barrier that combines difficulty with body of wall is arranged; can only could use in the open by outsourcing hard protective seam (as sheet metal), this type of material of while easily leaks out fibre dust and organic residue pollutes environment.Existing hard porous acoustic absorbant, as aluminium matter class, ceramic-like, synthetic resin material, owing to the sintering reason, pore-forming difficulty, complex process, cost are too high, can't actually be applied.

The purpose of this utility model is the above-mentioned defective at existing acoustic absorbant, provides a kind of weather resisteant good, cheap practical magnesite foam acoustic board, to satisfy on the market needs to open-air use acoustic absorbant.

The technical scheme that the utility model adopted is: with the lightweight magnesite cystosepiment that is added with polymkeric substance is substrate, and substrate inside is full of small pore.For making these pore open communication rates bigger, and bigger, the perforation and the groove of some and shape is set on substrate with the contact area of outside air.Perforation and groove and substrate internal porosity connect mutually, have strengthened friction and the viscosity resistance of sound wave in pore, and acoustic energy is dissolved easily fully to be sponged.The result of She Zhiing has like this improved the physical property and the sound absorbing capabilities of material, finally reaches the purpose of this utility model.

The beneficial effects of the utility model are: high-strength light, acoustically effective keep performance constant well and for a long time; Installation is easy, available sand-cement slurry sticking construction; Cheap, the open-air atmosphere that is particluarly suitable for the wind and rain etch uses down, as road construction sound barrier facility etc.

1-4 further specifies the utility model below in conjunction with accompanying drawing.

Fig. 1 is one of perforation synoptic diagram of the present utility model, part sectioned view and instance graph;

Fig. 2 is the different shape cut-open view of groove of the present utility model;

Fig. 3 is two of an instance graph of the present utility model;

Fig. 4 is three of an instance graph of the present utility model;

In the substrate of forming by flyash, magnesium chloride, magnesium oxide, gas-development agent, polymkeric substance (1) inside, be full of small pore (2).The perforation (3) and the groove (4a, 4b, 4c, 4d) of some and shape are set on the sound absorption face of substrate, perforation and groove and substrate internal porosity are connected mutually, its further groove be shaped as the V font, as (4a) among Fig. 2; Or be square, as (4b) among Fig. 2; Or be trapezoidal, as (4c) among Fig. 2; Or be semicircle, as (4d) among Fig. 2.Can parallel (Fig. 3) between the groove, can intersect (Fig. 4).

Embodiment: the utility model when implementing, with flyash and magnesia cement Jia Shui, add gas-development agent, polymkeric substance foams.Polymkeric substance has strengthened bonding force between the material, has strengthened the intensity and the toughness of substrate and pore, and makes it that excellent waterproofness and processibility be arranged.Behind the substrate forming, different according to the noise different frequency with purposes, the perforation and the groove of processing varying number and shape.The processing available combination needle-like mould compacting puncture of perforation; The available difform gang cutter sawing of the processing of groove.

Claims (3)

1, a kind of magnesite foam acoustic board, it is characterized in that: in the substrate of forming by flyash, magnesium chloride, magnesium oxide, gas-development agent, polymkeric substance (1) inside, be full of small pore (2), the perforation and the groove of some and shape are set on substrate sound absorption face, and perforation and groove and substrate internal porosity connect mutually.

2, magnesite foam acoustic board according to claim 1, what it is characterized in that its further groove is shaped as V font (4a), square (4b), trapezoidal (4c), semicircle (4d).

3, magnesite foam acoustic board according to claim 1, it is characterized in that between its further groove can be parallel, can intersect.

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