CN212434251U - Sound absorption panel - Google Patents

Abstract

The utility model discloses a sound absorption panel, locate the honeycomb core between perforated plate and the bottom plate including perforated plate, bottom plate and clamp, a plurality of mounting holes have been seted up on the perforated plate, the extension pipe has been inserted in the mounting hole, the honeycomb core includes a plurality of honeycomb cell elements, each the extension pipe one-to-one ground extends to each in the honeycomb cell element. The utility model has the advantages of simple and reliable integral structure, sufficient mechanical strength and lighter weight have, can realize the sound absorption effect of lower frequency.

Description

Sound absorption panel

Technical Field

The utility model relates to a sound absorbing material especially relates to a sound absorption panel, mainly is applicable to rail transit car body structure.

Background

Aiming at the low-frequency and medium-frequency noise, the sound absorber based on the perforated plate is used in practice, and compared with the traditional sound absorption material, the perforated plate is simpler in structure, more environment-friendly and suitable for severe environments such as high temperature, high pressure and the like. The sound absorption panel composed of the honeycomb core and the perforated plate has sufficient mechanical strength and light weight, and the sound absorption performance thereof is improved. The above structure, however, does not effectively eliminate low frequency noise and, limited by its geometry, has the disadvantage of a fixed, rather narrow absorption peak.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a simple structure, have the sound absorption panel of the sound absorption effect of lower frequency.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a sound absorption panel, includes perforated plate, bottom plate and presss from both sides the honeycomb core of locating between perforated plate and the bottom plate, a plurality of mounting holes have been seted up on the perforated plate, it is equipped with the extension pipe to insert in the mounting hole, the honeycomb core includes a plurality of honeycomb cell elements, each the extension pipe one-to-one extends to each in the honeycomb cell element.

As a further improvement of the above technical solution: the mounting holes are divided into a plurality of rows, two adjacent rows are staggered with each other, the diameter of each row of the mounting holes is gradually increased or gradually reduced, the mounting holes in the same row are divided into a plurality of groups, and the length of each extension pipe in the mounting holes in the same group is gradually increased or gradually reduced.

As a further improvement of the above technical solution: the honeycomb core upside with perforated plate downside bonds fixedly, the honeycomb core downside with the bottom plate upside bonds fixedly.

As a further improvement of the above technical solution: the lower side of the mounting hole is fixedly bonded with the extension pipe.

As a further improvement of the above technical solution: the perforated plate and the bottom plate are aluminum alloy plates.

As a further improvement of the above technical solution: the mounting hole is formed by laser drilling.

As a further improvement of the above technical solution: the honeycomb core is a Nomex core, and the extension pipe is a hard PVC pipe.

As a further improvement of the above technical solution: the extension pipe is in clearance fit with the mounting hole.

As a further improvement of the above technical solution: the extension pipe is a hard PVC pipe.

As a further improvement of the above technical solution: the honeycomb core is a Nomex core.

Compared with the prior art, the utility model has the advantages of: the utility model discloses a sound absorption panel utilizes honeycomb cell element, perforated plate and bottom plate combination to form a resonance cavity to extend the aperture through the extension pipe of inserting and locating in the perforated plate, thereby can reach the sound absorption effect of lower frequency, and overall structure is simple, reliable, has sufficient mechanical strength and lighter weight.

Drawings

Fig. 1 is a schematic perspective view of the sound absorption panel of the present invention.

Fig. 2 is a schematic perspective view of the sound absorption panel according to the present invention in a disassembled state.

Fig. 3 is a schematic sectional view of two sets of mounting holes in the same row.

Fig. 4 is a schematic top view of the perforated plate according to the present invention.

The reference numerals in the figures denote: 1. a perforated plate; 11. mounting holes; 2. a base plate; 3. a honeycomb core; 31. a cellular cell; 4. an extension pipe.

Detailed Description

The invention is described in further detail below with reference to the drawings and specific examples.

Fig. 1 to 4 show an embodiment of the sound absorption panel of the present invention, the sound absorption panel of this embodiment, including perforated plate 1, bottom plate 2 and press from both sides the honeycomb core 3 of locating between perforated plate 1 and bottom plate 2, a plurality of mounting holes 11 have been seted up on perforated plate 1, have inserted extension pipe 4 in the mounting hole 11, and honeycomb core 3 includes a plurality of honeycomb cell elements 31, and each extension pipe 4 one-to-one extends to in each honeycomb cell element 31.

This sound absorption panel utilizes honeycomb cell 31, perforated plate 1 and bottom plate 2 combination formation resonance cavity in the honeycomb core 3 to through inserting the extension 4 extension aperture of locating in perforated plate 1, thereby can reach the sound absorption effect of lower frequency, and overall structure is simple, reliable, has sufficient mechanical strength and lighter weight.

Further, the mounting holes 11 are divided into a plurality of rows, two adjacent rows are staggered with each other, the diameter of each row of mounting holes 11 gradually increases or gradually decreases, the same row of mounting holes 11 is divided into a plurality of groups, and the length of each extension pipe 4 in the same group of mounting holes 11 gradually increases or gradually decreases. Referring to fig. 3 and 4 in particular, in the present embodiment, the mounting holes 11 located on the same straight line from left to right are in a row, and the diameter of each row of mounting holes 11 gradually decreases from bottom to top, but in other embodiments, the diameter of each row of mounting holes 11 may also gradually increase; from left to right, every 4 mounting holes 11 in the same row are grouped into a group, and the lengths of the 4 extension pipes 4 corresponding to the same group are gradually reduced, but in other embodiments, the lengths of the extension pipes 4 in the same group may also be gradually increased. Through the change of the diameters of the multiple rows of mounting holes 11 and the periodic change of the lengths of the extension pipes 4 in the same row of mounting holes 11, or through the cross combination of the extension pipes 4 with different aperture sizes and different lengths, the sound absorption panel structure has multiple groups of resonance frequencies, and a wider sound absorption frequency band can be achieved.

In the present embodiment, preferably, the upper side of the honeycomb core 3 and the lower side of the perforated plate 1 are bonded and fixed by an adhesive layer, the lower side of the honeycomb core 3 and the upper side of the bottom plate 2 are also bonded and fixed by an adhesive layer, and the lower side of the mounting hole 11 and the extension pipe 4 are similarly bonded and fixed. In the manufacturing process, the extension pipe 4 can be inserted into the mounting hole 11, the upper end of the extension pipe is kept flush with the upper side of the perforated plate 1, and then the lower side of the perforated plate 1 and the interface of the extension pipe 4 are bonded and fixed by glue; before fixing the honeycomb core 3, a glue layer is covered on the lower side of the perforated plate 1 and the upper side of the bottom plate 2 in advance, and then the honeycomb core 3 is fixed in the two glue layers.

In the present embodiment, the perforated plate 1 and the bottom plate 2 are preferably aluminum alloy plates. The aluminum alloy plate is light in weight and good in mechanical strength, and the mounting hole 11 can be conveniently machined in a laser drilling mode in the follow-up process. Of course, in other embodiments, a metal panel or a composite panel may be used for the perforated plate 1 and the bottom plate 2.

In the present embodiment, the mounting hole 11 is preferably formed by laser drilling. And laser drilling is adopted, so that the aperture precision is guaranteed, and the processing efficiency is higher. Of course, in other embodiments, the mounting hole 11 may be formed by punching or the like.

As a preferable technical solution, in this embodiment, the honeycomb core 3 is a Nomex core (Nomex, also called aramid elastic synthetic fiber), is high temperature resistant, flame retardant, non-toxic, and has good electrical and mechanical properties, and the extension pipe 4 is a rigid PVC pipe. Of course, in other embodiments, a resin honeycomb core or the like may also be employed.

As a preferable technical solution, in this embodiment, the extension pipe 4 and the mounting hole 11 are in clearance fit, so that the extension pipe 4 can be inserted into the mounting hole 11 conveniently, and the efficiency is improved.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. A sound absorbing panel characterized by: including perforated plate (1), bottom plate (2) and press from both sides honeycomb core (3) of locating between perforated plate (1) and bottom plate (2), a plurality of mounting holes (11) have been seted up on perforated plate (1), it is equipped with extension pipe (4) to insert in mounting hole (11), honeycomb core (3) include a plurality of honeycomb cell elements (31), each extension pipe (4) one-to-one extends to each in the honeycomb cell element (31).

2. The sound absorbing panel of claim 1, wherein: the mounting holes (11) are divided into a plurality of rows, two adjacent rows are staggered with each other, the diameter of each row of the mounting holes (11) is gradually increased or gradually reduced, the mounting holes (11) in the same row are divided into a plurality of groups, and the length of each extension pipe (4) in the mounting holes (11) in the same group is gradually increased or gradually reduced.

3. A sound absorbing panel as set forth in claim 1 or 2, wherein: the upper side of the honeycomb core (3) is fixedly bonded with the lower side of the perforated plate (1), and the lower side of the honeycomb core (3) is fixedly bonded with the upper side of the bottom plate (2).

4. The sound absorbing panel of claim 3, wherein: the lower side of the mounting hole (11) is fixedly bonded with the extension pipe (4).

5. A sound absorbing panel as set forth in claim 1 or 2, wherein: the perforated plate (1) and the bottom plate (2) are aluminum alloy plates.

6. The sound absorbing panel of claim 5, wherein: the mounting hole (11) is formed by laser drilling.

7. The sound absorbing panel of claim 5, wherein: the honeycomb core (3) is a Nomex core, and the extension pipe (4) is a hard PVC pipe.

8. A sound absorbing panel as set forth in claim 1 or 2, wherein: the extension pipe (4) is in clearance fit with the mounting hole (11).

9. A sound absorbing panel as set forth in claim 1 or 2, wherein: the extension pipe (4) is a hard PVC pipe.

10. A sound absorbing panel as set forth in claim 1 or 2, wherein: the honeycomb core (3) is a Nomex core.

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