CN210467316U

CN210467316U - Metal micropore sound insulation board

Info

Publication number: CN210467316U
Application number: CN201920949742.7U
Authority: CN
Inventors: 刘晓健; 凡友华; 李志萍; 郭林坪; 王文婕; 王文艳
Original assignee: Tianjin Chengjian University
Current assignee: Tianjin Chengjian University
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-05-05
Anticipated expiration: 2029-06-24

Abstract

The utility model provides a metal micropore sound insulation board, including the trompil board, trompil board and trompil board between be provided with foamed aluminum, trompil board upper surface central point puts and has seted up the one-level hole, the one-level hole on seted up a plurality of second grade holes. The beneficial effects of the utility model are that the high-usage, convenient processing, the sound insulation is effectual, long service life.

Description

Metal micropore sound insulation board

Technical Field

The utility model belongs to the technical field of the product that gives sound insulation, especially, relate to a metal micropore sound-proof board.

Background

The concept of phononic crystals, a so-called phononic crystal, was introduced in the nineties of the last century, and is an artificial periodic elastic composite material in which elastic waves, when propagating therein, create elastic wave bands, i.e. elastic waves or acoustic waves of certain frequencies, are prohibited from propagating. The band gap characteristics are important features of phononic crystals. The self design of the phononic crystal is realized by establishing a topological structure, so that the artificial composite material of the phononic crystal can better meet the application requirement, and the problem of priority consideration when utilizing the band gap characteristic of the phononic crystal is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-usage, convenient processing, the sound insulation is effectual, long service life's metal micropore sound-proof board.

The technical scheme of the utility model is that:

the utility model provides a metal micropore sound insulation board, including the trompil board, trompil board and trompil board between be provided with foamed aluminum, the one-level hole has been seted up to trompil board upper surface central point, the one-level hole on seted up a plurality of second grade holes.

Furthermore, the upper surface and the lower surface of the perforated plate, the primary holes and the secondary holes are in the same parallelogram.

Furthermore, the upper surface and the lower surface of the perforated plate, the primary holes and the secondary holes are square.

Further, the area of the primary holes is one fourth of the area of the upper surface of the perforated plate, and the area of the secondary holes is one fourth of the area of the primary holes.

Furthermore, the center point of the secondary hole coincides with the intersection point of the adjacent sides of the primary hole.

Furthermore, the number of the steps of forming the holes on the upper surface of the perforated plate is more than two.

Further, the thickness of the perforated plate is more than one millimeter.

The utility model has the advantages and positive effects that: due to the adoption of the technical scheme, the utility model relates to a rationally, it is more convenient to use, has the high-usage, convenient processing, and the sound insulation is effectual, advantages such as long service life.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic structural view of a perforated plate with primary holes;

FIG. 3 is a schematic structural view of a perforated plate having primary and secondary holes;

FIG. 4 is a schematic structural view of a perforated plate having primary, secondary and tertiary holes;

FIG. 5 is a schematic structural diagram of a perforated plate with first, second, third and fourth holes.

In the figure:

1. perforated plate 2, foamed aluminum 3 and primary holes

4. Second level hole

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the present invention relates to a metal microporous sound-proof board.

Examples

The utility model provides a metal micropore sound insulation board, including the trompil board, trompil board 1 and trompil board between be provided with

foamed aluminum

2, 1 upper surface central point of trompil board puts and has seted up one-level hole 3, one-level hole 3 on seted up a plurality of second grade holes 4.

Wherein, the upper and lower surfaces of the perforated plate 1, the primary holes 3 and the secondary holes 4 are in the same parallelogram. Compared with the patterns in other shapes, the parallelogram has more available effective space, the shapes of the formed T-shaped angle fractal holes are more consistent, the sound insulation effect is better, and the effects of improving the utilization rate and enhancing the sound insulation are achieved.

Wherein, the upper and lower surfaces of the perforated plate 1, the primary holes 3 and the secondary holes 4 are square. The upper and lower surface of perforated plate 1 is the square, and perforated plate 1 wholly is the square, and the square is compared in the object of other shapes, and the concatenation degree is higher, and the shape that can splice is also more to behind one-level hole 3 and second grade hole 4 are the square, T shape angle fractal hole can be come out by easier processing.

Wherein the area of the primary holes 3 is one fourth of the area of the upper surface of the perforated plate 1, and the area of the secondary holes 4 is one fourth of the area of the primary holes 3. Every time the stage number of the opened hole is increased by one stage, the area of the opened hole corresponding to the stage number is one fourth of the area of the opened hole of the previous stage, and by analogy, the outermost edge of the opened hole is infinitely close to the edge of the opened hole plate 1 without superposition, and along with the increase of the stage number of the opened hole, the number of the T-shaped angle distribution holes can be increased, and the sound insulation effect is better.

Wherein, the center point of the secondary hole 4 coincides with the intersection point of the adjacent sides of the primary hole 3. When the outermost edge of seting up the hole is infinitely close with the edge of trompil board 1, improve trompil board 1's utilization ratio, make the arrangement of seting up the hole more normal, more reasonable and more clear, make the contrast data after the experiment more have the reliability.

The number of the steps of forming the holes on the upper surface of the perforated plate 1 is more than two. When the number of the stages of the holes is equal to three, the structure of the T-shaped angle fractal hole can be formed in the hole opening plate 1, the T-shaped angle fractal hole can enable the hole opening plate 1 to obtain a forbidden band structure with lower frequency, the property of low-frequency broadband is achieved, and the effects of reducing audio frequency and separating sound are achieved.

Wherein, the thickness of the perforated plate 1 is more than one millimeter. When the thickness of trompil board 1 is less than a millimeter, the rank progression that the hole was seted up to trompil board 1 upper surface just can receive the restriction, because the rank progression that the hole was seted up to trompil board 1 upper surface is more when, trompil board 1 side wall thickness is thinner, the resistance to compression effect of trompil board 1 will be worse, make trompil board 1 easily warp, and the rank progression that the hole was seted up to trompil board 1 upper surface is more, the sound insulation effect is better, when the thickness of trompil board 1 is greater than a millimeter, the rank progression that the hole was seted up to trompil board 1 upper surface can increase, the resistance to compression effect of trompil board 1 also can obviously strengthen, improved the sound insulation effect has been played, increase of.

The working process of the example is as follows:

set up one-level hole 3 in the central point of trompil board 1, then set up second grade hole 4 with the nodical point of the adjacent limit of one-level hole 3 as the center, set up tertiary hole with the nodical point of the adjacent limit of second grade hole 4 as the center again, analogize with this, under the circumstances of the resistance to compression effect of assurance trompil board 1, the number of the rank of seting up the hole does not have the restriction, along with the increase of the rank of seting up the hole, the quantity in T shape angular distribution hole also can increase, and simultaneously, the width of elastic wave forbidden band is wider, the sound frequency in the elastic wave forbidden band is lower, the sound insulation effect will be better.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The utility model provides a metal micropore sound insulation board which characterized in that: including the trompil board, trompil board (1) and trompil board (1) between be provided with foamed aluminum (2), one-level hole (3) have been seted up to trompil board (1) upper surface central point, one-level hole (3) on seted up a plurality of second grade holes (4).

2. The metal microporous sound insulation board according to claim 1, wherein: the upper surface and the lower surface of the perforated plate (1), the primary holes (3) and the secondary holes (4) are in the same parallelogram shape.

3. The metal microporous sound insulation board according to claim 2, wherein: the upper surface and the lower surface of the perforated plate (1), the primary holes (3) and the secondary holes (4) are square.

4. The metal microporous sound insulation board according to claim 1, wherein: the area of the primary hole (3) is one fourth of the area of the upper surface of the perforated plate (1), and the area of the secondary hole (4) is one fourth of the area of the primary hole (3).

5. The metal microporous sound insulation board according to claim 1, wherein: the center point of the secondary hole (4) is coincided with the intersection point of the adjacent edges of the primary hole (3).

6. The metal microporous sound insulation board according to claim 1, wherein: the number of stages of the holes formed in the upper surface of the perforated plate (1) is more than two.

7. The metal microporous sound insulation board according to claim 1, wherein: the thickness of the perforated plate (1) is more than one millimeter.