KR200252277Y1 - Soundproofing Panel - Google Patents

Abstract

The present invention discloses an improved soundproof plate that constitutes a soundproof wall.

In the present invention, the rear plate is joined to the rear of the front plate having a plurality of slots for ventilation at regular intervals to form a space therein. In the inner space formed by the front plate and the back plate, a perforated plate having a plurality of through holes is installed in a vertical direction to divide the inner space into two zones. The first sound absorbing material is installed in the front space to be in close contact with the front plate and the perforated plate, and the second sound absorbing material is installed in the rear space to be in close contact with the back plate and the porous plate. The back plate is formed with a support protrusion for contacting and supporting the second sound absorbing material from the rear side, so that an air layer is formed between the back plate and the second sound absorbing material to induce resonance of sound waves.

Accordingly, the present invention is that the sound waves introduced into the soundproof panel is resonated in the first and second sound absorbing double, so that the sound absorption rate can be increased compared to the prior art without increasing the thickness of the sound absorbing material under the same conditions, so that the rear It is possible to reduce the noise transmitted through.

Description

Soundproofing Panel {Soundproofing Panel}

The present invention relates to a soundproof wall (차단 音 소음) to block various noises, and more specifically, a soundproof plate that absorbs the noise by forming a wall is stacked between a plurality of struts arranged at regular intervals ( soundproofing panel).

In general, the noise around roads is very high, and people living on the roadside or in the immediate vicinity are subject to severe noise pollution. In addition, surroundings of large factories, etc., are also subject to noise damage caused by plant operations. Accordingly, the sound barrier wall (W) for blocking the noise to the adjacent area is installed on the road or the fence of the factory adjacent to the residential area as shown in FIG. This soundproof wall (W) is fixed to the array of a plurality of H beam struts (S) at a predetermined interval by the anchor bolt (B) on the foundation concrete (C), opposing channels of two adjacent struts (S) After stacking a plurality of sound insulation plates 1 each absorbing noise in the channels, the upper end is fixed with a connecting plate P. Therefore, in order for the sound insulation wall W to have the excellent sound insulation efficiency, the sound absorption performance of the sound insulation board 1 must be excellent.

2 shows an example of such a conventional sound insulation board (W). This joins the back plate 4 at a predetermined interval to the rear of the front plate 2 having a plurality of slots 3 of a predetermined type, for example, gallery type, and the front plate 2 and the back plate. The sound absorbing material 7, such as glass wool, is accommodated in the internal space 6 which is comprised of (4). And the backing plate 4 is formed by bending the support protrusion 5 for contacting and supporting the rear surface of the sound absorbing material 7 inward to form an air layer 8 between the backing plate 4 and the sound absorbing material 7. have. Accordingly, the sound waves in the air are introduced into the sound insulation panel 1 through the slots 3 of the front plate 2, and then absorbed and attenuated by the sound absorbing material 7 primarily, while passing through the sound absorbing material 7. A sound wave is resonated by the air layer 8 and the back plate 4 which are subsequently followed to block the noise.

By the way, the conventional soundproof plate (1) is a resonance of the introduced sound wave only once, only a part of the sound wave transmitted through the sound absorbing material (7) is shielded, most of the sound waves as shown by the dotted arrow in Figure 2 back plate It passes through (4) and is transmitted to the rear. That is, the back plate 4 is usually composed of a zinc steel plate for weight reduction and corrosion prevention of the soundproof plate 1, which has a sound wave transmittance of about 70%, so that only a part of the sound waves passing through the sound absorbing material 7 is the back plate. Most of the sound waves are transmitted through the back plate 4 as they are reflected by (4) and re-enter the sound absorbing material (7). Therefore, even if the noise barrier (W) is installed on the side of the road, there is no choice but to accept some noise.

On the other hand, as a means for solving this problem, a method of increasing the sound absorption rate by increasing the thickness of the sound absorbing material 7 may be devised. In this case, the thickness of the sound insulation board 1 is increased, which makes handling and construction complicated, and the cost increases. The resonance of the sound wave is still only one time, and a part of the sound wave is transmitted backward, which is not a proper solution.

The present invention has been made to solve the above-mentioned conventional problems, it is possible to improve the sound absorption rate without increasing the thickness of the sound absorbing material, thereby providing a sound insulation plate that can lower the transmittance of sound waves transmitted to the rear. There is this.

1 is a front view schematically showing an example of a sound barrier;

2 is a cross-sectional view showing a conventional soundproof plate,

3 is a cross-sectional view showing a soundproof plate according to the present invention,

4 is a perspective view showing an extract of the porous plate of FIG.

5A and 5B are cross-sectional views illustrating other embodiments of the present invention.

`` Explanation of symbols for main parts of drawings ''

11: front panel 11a: slot (front panel)

12: back plate 13: support protrusion (back plate)

15: perforated plate 15a: through hole (of perforated plate)

16,16 ', 16': first sound absorbing material 18,18 ', 18': second sound absorbing material

20: air layer 21: polyester wool

In order to achieve the above object, the soundproof plate according to the present invention includes a front plate having a plurality of slots for venting, a back plate having a support protrusion formed at a distance from the rear side of the front plate and formed in a bending band, and the front surface thereof. In the soundproof plate which is installed in a vertical direction in the inner space formed by the plate and the back plate and composed of a first sound absorbing material and a second sound absorbing material, a portion of the sound wave transmitted through the first sound absorbing material between the first sound absorbing material and the second sound absorbing material is first And a porous plate having a plurality of through holes for reflecting the sound absorbing material and introducing the rest into the second sound absorbing material.

According to one preferred feature of the present invention, the first and second sound absorbing material is composed of glass wool wrapped with a polyvinyl film (PVF).

According to another preferred feature of the present invention, the first sound absorbing material is composed of polyester wool, the second sound absorbing material is composed of glass wool.

According to this structural feature, the present invention, the sound wave introduced into the soundproof panel is resonated in the first and second sound absorbing double, so that the sound absorption rate can be increased compared to the prior art without increasing the thickness of the sound absorbing material under the same conditions. As a result, the noise transmitted to the rear can be suppressed as much as possible.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 and 4, the soundproof plate 10 according to the present invention is basically a front plate 11 formed with a plurality of gallery-type ventilation slots 11a arranged in a predetermined form, and the rear of the front plate 11 It is provided with a back plate 12 which is positioned at regular intervals to be bonded to the front plate 11 to form a cavity (14) inside the two. The front plate 11 is excellent in corrosion resistance and light weight, and should be excellent in workability for forming the slot 11a, and is composed of an aluminum steel sheet. On the other hand, the back plate 12 is composed of a zinc steel sheet because the sound wave transmittance should be low while requiring excellent corrosion resistance and light weight.

Meanwhile, in the cavity 14 formed by the front plate 11 and the back plate 12 according to the features of the present invention, the porous plate 15 having a plurality of through holes 15a is installed in the vertical direction to provide the cavity 14. It is divided into two zones, the front and rear cavities 14a and 14b. A first sound absorbing material 16 made of glass wool is accommodated in the front cavity 14a so as to be closely attached to the front plate 11 and the porous plate 15, respectively, and the second sound absorbing material 18 made of glass wool in the rear cavity 14b. ) Is accommodated in close contact with the back plate 12 and the porous plate 15, respectively. The thickness t1 (t2) of the first and second sound absorbing materials 16 and 18 is about half of the thickness of the existing sound absorbing material (7 of FIG. 2) in consideration of the thickness of the sound insulating plate 10. In addition, the back plate 12 is formed with a support protrusion 13 which is bent toward the cavity so that its intermediate portion faces in the horizontal direction and supports the back side of the second sound absorbing material 18. Accordingly, the back plate 12 and the first plate are formed. Between the two sound absorbing materials 18, an air layer 20 having a predetermined width for inducing resonance of sound waves is formed together.

The porous plate 15 may be fixed to the skirt 12a of the rear plate 12 by welding or the like, but by the support protrusion 13 for supporting the second sound absorbing material 18 formed on the rear plate 12. Since there is a close intervening between the first and second sound absorbing material (16, 18), it does not need to be fixed separately, as shown in the flange contacting the inner surface of the skirt (12a) of the back plate 12 on the top and bottom It is enough just to form (15b).

On the other hand, since glass wool is made by drawing a glass of low melting point containing a lot of soda into a fibrous form, there is a high possibility that glass powder may be blown and adversely affect the human body. Each sound absorbing material (16) (18) is desirable. It is composed of a polyvinyl film (17, 19) wrapped to prevent the scattering of glass powder. The polyvinyl films 17 and 19 are known to exhibit excellent moisture resistance and have a strong durability against weather changes such as sunlight and winter.

Soundproof plate 10 according to the present invention having such a structural feature is the first sound wave introduced into the cavity 14 is passed through the first sound absorbing material 16 of the front cavity 14a, and then the porous plate 15 The second sound absorbing plate 18 of the rear cavity 14b is resonated secondly through the through-hole 15a of the existing sound insulation plate having the same thickness without increasing the thickness of the sound absorbing material 16 and 18 under the same conditions. Compared with 1) of 2, a high sound absorption rate can be obtained.

That is, the sound wave introduced into the front cavity 14a through the slot 11a of the front plate 11 is absorbed by the predetermined sound absorption rate as it passes through the first sound absorbing material 16, and the rest of the sound absorbing material 16 is absorbed by the first sound absorbing material 16. In this case, only a part of the sound wave transmitted through the first sound absorbing material 16 flows into the rear cavity 14b through the through hole 15a of the porous plate 15, and the rest of the sound wave is transmitted from the porous plate 15. It is reflected and absorbed again by re-entering into the first sound absorbing material 16. Therefore, the actual sound wave amount introduced into the rear cavity 14b is the sound absorption rate of the first sound absorbing material 16 at the first sound wave amount and the sound wave amount reflected by the porous plate 15 and reabsorbed by the first sound absorbing material 16. The sum is limited. And the first reduced sound wave introduced into the rear cavity 14b is absorbed by the predetermined sound absorption rate as it passes through the second sound absorbing material 18, and the rest passes through the second sound absorbing material 18 to follow the air layer 20. By resonating at a part of the attenuated portion is reflected by the back plate 12 is passed back through the air layer 20 to be absorbed again by the second sound absorbing material (18).

Therefore, even if the sum of the thicknesses t1 and t2 of the first and second sound absorbing materials 16 and 18 is equal to the thickness of the existing sound absorbing material (7 in FIG. 2), the sound wave is formed by the porous plate 15 interposed therebetween. Since the resonant phenomenon is doubled, the sound absorption rate is increased as compared with the conventional case under the same conditions, and the amount of sound waves transmitted rearward through the back plate 12 is reduced.

Meanwhile, other embodiments of the present invention are shown in FIG. 5. The configuration shown in Figure 5a is that the first sound absorbing material (16 ') is made of polyester wool in the above-described embodiment, in this case a polyvinyl film wrapped to prevent the scattering of glass of the second sound absorbing material (18') made of glass wool ( 19) need not be provided. In general, polyester wool is more expensive than glass wool, but the polyvinyl film 19 surrounding the glass wool is also expensive, in which case the polyvinyl film 17 wrapping the first and second sound absorbing materials 16 and 18 of the above-described embodiment, respectively. 19 are excluded, so the cost of the sound insulation board 10 is not significantly affected. This embodiment also has the same effect as the above-described embodiment.

In addition, the configuration shown in FIG. 5B is a thin polyester wool 21 is further installed in front of the first sound absorbing plate 16 ″ in the above-described first embodiment, and in this case as in the above-described second embodiment It is possible to exclude the polyvinyl films 17 and 19 surrounding the first and second sound absorbing materials 16 '' and 18 '' made of glass wool, without further affecting the cost of the sound insulation board 10. Improved sound absorption efficiency can be expected.

As described above, according to the present invention, the inner space formed by the front plate and the back plate is divided into two zones of the front and the rear by the perforated plate, and sound absorbing materials are installed in each, so that the sound waves introduced from the outside are resonated in a double manner. Under the same conditions that do not increase the thickness of the sound absorbing material, the sound absorbing rate is increased compared with the conventional one, thereby effectively suppressing the noise transmitted to the rear.

Therefore, the present invention has a great effect on improving the noise blocking rate and reliability of the soundproof wall.

Claims (1)

A front plate having a plurality of slots for ventilation, a back plate having a support protrusion formed at a predetermined interval to the rear of the front plate and bent inwardly, and installed in a vertical direction in an inner space formed by the front plate and the back plate; In the sound absorbing plate composed of a first sound absorbing material and a second sound absorbing material, a plurality of the sound absorbing material that passes through the first sound absorbing material between the first sound absorbing material and the second sound absorbing material to reflect the first sound absorbing material and the rest to the second sound absorbing material Soundproof plate, characterized in that the porous plate having a through hole of the configuration is provided.