CN202137986U - Variable cross-section perforated wideband acoustic board with double-layer sandwiches - Google Patents
Variable cross-section perforated wideband acoustic board with double-layer sandwiches Download PDFInfo
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- CN202137986U CN202137986U CN201120254494U CN201120254494U CN202137986U CN 202137986 U CN202137986 U CN 202137986U CN 201120254494 U CN201120254494 U CN 201120254494U CN 201120254494 U CN201120254494 U CN 201120254494U CN 202137986 U CN202137986 U CN 202137986U
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Abstract
The utility model relates to an acoustic board, in particular to a variable cross-section perforated wideband acoustic board with double-layer sandwiches, which aims to solve the problem of narrow acoustic bands of existing wood acoustic boards. A face board, an upper sandwich layer, a paper lamina, a lower sandwich layer and a back board are adhered together sequentially from top to bottom, the face board is provided with a plurality of through holes evenly distributed in the thickness direction, each through hole comprises a small-diameter round hole and a large-diameter round hole or a conical hole, the small-diameter round holes are arranged on the front surface of the face board, the large-diameter round holes or the conical holes are arranged on the back surface of the face board, the bore diameter of each small-diameter round hole is equal to that of a small end of each conical hole, both the upper sandwich layer and the lower sandwich layer are cellular, each cellular sandwich layer comprises a plurality of cylinders respectively with a hexagonal cross section in a spliced manner, an inner cavity of each cylinder with the hexagonal cross section is a cellular cavity, a plurality of cellular cavities of the upper sandwich layer, a plurality of cellular cavities of the lower sandwich layer and the through holes on the face board are arranged in a communicated manner. The variable cross-section perforated wideband acoustic board with the double-layer sandwiches is used for indoor places with higher requirements on acoustics in architectural design.
Description
Technical field
The utility model relates to a kind of acoustic board, belongs to the sound absorption technique field.
Background technology
Along with big industrial continuous development, noise pollution has become with air pollution, water pollutes one of three big pollutions arranged side by side, is classified as the subject matter of 21 century environmental pollution control.Normal order of work of influence of noise and operating efficiency also influence daily life and physical and mental health.The control noise has become the human task of top priority.
Sound absorption is one of major measure of noise control.At present, the ornament materials that is used for indoor sound absorption generally adopts inorfil sound-absorbing porous materials such as mineral wool, mineral wool, and they are crisp because of fibroid in the process of installation, fractureing easily forms that dust dissipation contaminated environment, influence are breathed, scratchy skin.Also have the metal piercing acoustic board in addition,, but be prone to give ice-cold sensation, be not suitable for the room in little space, and cost compares higher like punched steel plate, Pierced Aluminum Plank etc.
Wooden acoustic board is a kind of emerging sound-absorbing material, mainly contains groove wood, hole wood acoustic board and wood wool acoustic board on the current market.Wherein, it is in the majority to open the groove wood acoustic board that adds one deck sound-absorbing mat behind straight flute, back side perforation, the backboard again with medium density fibre board (MDF) or light particleboard as the front of base material.In addition, also have the wooden acoustic board of a kind of many Helmholtz resonators parallel connection type cellular sandwich, form by perforated panel, cellular sandwich layer and backboard; This sound absorption structure (helmholtz resonance body) is made up of big cavity and narrow eck; The material space outerpace is connected through narrow bottleneck with internal cavity, and under the effect of sound wave, the air column in the pore-throat is reciprocating just as piston; The air of opening part vibration makes part acoustic energy be converted into heat energy owing to friction is blocked.The main feature of this sound absorption structure is that the selectivity of frequency is strong, and promptly sound sucting band is narrow, near resonant frequency, can have sound absorbing capabilities preferably, and off-resonance frequence, then acoustically effective can variation.Many helmholtz resonances body sound absorption structure is formed in parallel by a plurality of single Helmholtz resonators, and it can remedy and improve the deficiency of single helmholtz resonance body to a certain extent.In addition, also have a kind of broadband lightweight acoustical panels, the advantage through perforated panel and double-deck cellular sandwich combines plural sound absorption peak to have occurred, and is better at the medium-high frequency sound absorbing capabilities, but its sound sucting band is narrow, sound absorbing capabilities is also relatively poor.
The utility model content
There is the narrow problem of sound sucting band in the utility model in order to solve existing wooden acoustic board, and then a kind of variable cross-section double-deck sandwich broadband acoustic board of boring a hole is provided.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: the variable cross-section of the utility model double-deck sandwich broadband acoustic board of boring a hole; Said acoustic board comprises panel, goes up sandwich layer, papery thin layer, sandwich layer and backboard down, said panel, go up sandwich layer, papery thin layer, sandwich layer and backboard from top to bottom bond together successively down; Said panel upper edge thickness direction is uniformly distributed with and is processed with a plurality of through holes; Each through hole is made up of minor diameter circular hole and major diameter circular hole or conical bore; Said minor diameter circular hole is opened on the front of panel; Said major diameter circular hole or conical bore are opened on the back side of panel; The aperture of said minor diameter circular hole equates that with the small end aperture of conical bore the said sandwich layer of going up is cellular sandwich layer with following sandwich layer, and said cellular sandwich layer is made up of for the hexagon cylindrical shell is stitched together a plurality of cross sections; Each cross section is that the inner chamber of hexagon cylindrical shell is a honeycomb chamber, and a plurality of honeycomb chambers on said a plurality of honeycomb chambers and the following sandwich layer of going up on the sandwich layer and a plurality of through holes on the panel are communicated with setting.
The utlity model has following beneficial effect: the utility model is clipped between the panel and papery thin layer of perforation, the sandwich layer between papery thin layer and the backboard is cellular sandwich layer (cellular sandwich); Because cellular sandwich is a kind of regular hexagon rock-steady structure, links together with panel and backboard, becomes a kind of force structure that is similar to countless I-beam aggregates; Sandwich layer is equivalent to the web of I-beam; Panel is equivalent to the wing plate of I-beam, has good bearing capacity, has the high-strength characteristics of light weight.The more important thing is that the panel of the said perforation of the utility model and upper strata cellular sandwich are formed many Helmholtz resonators array structure, have the sound absorption of certain bandwidth at medium and low frequency; Papery laminate structure between the two-layer cellular sandwich can produce the effect that vibration deformation reaches loss acoustic energy under acoustic wave excitation, can produce the ripple effect of inhaling at lower frequency region; Lower floor's cellular sandwich has the composite effect of many cells air chamber array structure concurrently, and the centering high frequency sound wave can play assimilation effect; The punch format of panel is the variable cross-section perforation, more can effectively absorb sound, and has the effect of widening sound sucting band.Therefore, above structure is compounded in the target that has realized on the design idea at full range band performance acoustically effective.
The said acoustic board of the utility model is owing to adopt the sandwich type structure; Realized to adopt other material except that timber to make acoustic board; Not only widen sound sucting band, improved sound absorbing capabilities; And light weight, high-strength, environmental protection, harmless to health, simple in structure, be convenient to construction, manufacture craft is simple, cost is low.
The design concept of the utility model is the combination through double-deck cellular board and variable cross-section perforation MDF (medium density fibre board (MDF)); Through processing simply and being connected; Realized that Helmholtz resonator and thistle board vibrate the advantage combination of sound absorption mechanism, thereby reached targets such as widening sound sucting band, raising sound absorbing capabilities and enhancing decorative effect.In addition, the structural form of the utility model also has characteristics such as light weight, ratio of strength to weight height.The utility model can be applicable to the indoor place (being used for architecture indoor metope and furred ceiling) that architectural design has higher requirements to acoustics, like conference hall, Conference Hall, wait (car) Room and hotel, restaurant, school, hospital, household etc.
Description of drawings
Fig. 1 is the bore a hole overall structure axonometric drawing of double-deck sandwich broadband acoustic board of the variable cross-section of the utility model, and the through hole among the figure on the panel 1 is made up of minor diameter circular hole 1-1 and major diameter circular hole 1-2;
Fig. 2 is the bore a hole overall structure axonometric drawing of double-deck sandwich broadband acoustic board of the variable cross-section of the utility model, and the through hole among the figure on the panel 1 is made up of minor diameter circular hole 1-1 and conical bore 1-3;
Fig. 3 is the bore a hole vertical view of double-deck sandwich broadband acoustic board of the variable cross-section of the utility model;
Fig. 4 is the bore a hole main cutaway view of double-deck sandwich broadband acoustic board of the variable cross-section of the utility model; Through hole among the figure on the panel 1 is made up of minor diameter circular hole 1-1 and major diameter circular hole 1-2;
Fig. 5 is the bore a hole main cutaway view of double-deck sandwich broadband acoustic board of the variable cross-section of the utility model; Through hole among the figure on the panel 1 is made up of minor diameter circular hole 1-1 and conical bore 1-3;
Fig. 6 is the axonometric drawing of the specific embodiment ten of the utility model.
The specific embodiment
The specific embodiment one: combine Fig. 1～Fig. 5 explanation; The variable cross-section of this embodiment double-deck sandwich broadband acoustic board of boring a hole; Said acoustic board comprises panel 1, goes up sandwich layer 2, papery thin layer 3, sandwich layer 4 and backboard 5 down, said panel 1, go up sandwich layer 2, papery thin layer 3, sandwich layer 4 and backboard 5 from top to bottom bond together successively down; Said panel 1 upper edge thickness direction is uniformly distributed with and is processed with a plurality of through holes; Each through hole is made up of minor diameter circular hole 1-1 and major diameter circular hole 1-2 or conical bore 1-3; Said minor diameter circular hole 1-1 is opened on the front of panel 1; Said major diameter circular hole 1-2 or conical bore 1-3 are opened on the back side of panel 1; The aperture of said minor diameter circular hole 1-1 equates that with the small end aperture of conical bore 1-3 the said sandwich layer 2 of going up is cellular sandwich layer (honeycomb core) with following sandwich layer 4, and said cellular sandwich layer is made up of for the hexagon cylindrical shell is stitched together a plurality of cross sections; Each cross section is that the inner chamber of hexagon cylindrical shell is a honeycomb chamber, a plurality of honeycomb chambers and the corresponding one by one connection setting of a plurality of through holes on the panel 1 on said a plurality of honeycomb chambers and the following sandwich layer of going up on the sandwich layer 24.
The said papery thin layer 3 of this embodiment adopts universaling packing paper or packing board.
The said backboard 5 of this embodiment adopts has sheet material certain intensity, that the surface has certain roughening, non-ornamental various materials.
Honeycomb cavity volume rate on the last sandwich layer 2 in this embodiment is 0.8-0.9; Honeycomb cavity volume rate on the said down sandwich layer 4 is 0.8-0.9, and the volume sum that said honeycomb cavity volume rate equals all honeycomb chambers in the sandwich layer accounts for the percentage of this sandwich layer volume.
The specific embodiment two: combine Fig. 1, Fig. 2 and Fig. 6 explanation, the punching rate of the said panel 1 of this embodiment is 3～10%, and said punching rate is the percentage that all via area sums on the panel account for the panel area.Sandwich layer 2 and the cavity volume rate that punching rate is 3～10% panel 1, the cavity volume rate is 0.8-0.9 is that sandwich layer 4 these three technical parameters of 0.8-0.9 combine, and greatly improved absorptivity.Other is identical with the specific embodiment one.
The specific embodiment three: combine Fig. 1～Fig. 5 explanation, the aperture of each minor diameter circular hole 1-1 of this embodiment is 1～10mm; The aperture of each major diameter circular hole 1-2 is 3～20mm.Other is identical with the specific embodiment one or two.
The specific embodiment four: combine Fig. 1, Fig. 2 and Fig. 6 explanation, the thickness of the said panel 1 of this embodiment is 5～20mm.Can satisfy requirement of strength.Other is identical with the specific embodiment one.
The specific embodiment five: combine Fig. 1, Fig. 2 and Fig. 6 explanation, the said panel 1 of this embodiment is any one in wood based panel, bamboo wood jigsaw, glued board, facing particieboard, facing fiberboard or the wood-plastic clad plate.Has decoration function.Other is identical with the specific embodiment one, two or four.
Wood based panel in this embodiment is a wood material plate, and particieboard is the particieboard that has facing, and fiberboard is general fibre plate or medium density fibre board (MDF).
The specific embodiment six: combine Fig. 1～Fig. 6 explanation, the said thickness of going up sandwich layer 2 and following sandwich layer 4 of this embodiment is 10～80mm.Other is identical with the specific embodiment one.
The specific embodiment seven: combine Fig. 1～Fig. 6 explanation, said upward sandwich layer 2 of this embodiment and following sandwich layer 4 are any one in the cellular sandwich layer of papery, aluminum alloy honeycomb shape sandwich layer or the frp honeycomb shape sandwich layer.Cellular sandwich is a kind of regular hexagon rock-steady structure, has good bearing capacity, has the high-strength characteristics of light weight.In addition, the combination of double-deck honeycomb sandwich board also has the effect of widening sound sucting band.Other and the specific embodiment one or six phase with.
The specific embodiment eight: combine the figure explanation, the thickness of the said papery thin layer 3 of this embodiment is 0.1～2mm.The papery thin layer has the effect of thin plate resonance sound-absorbing, mainly produces acoustically effective at the low frequency place.Other is identical with the specific embodiment one.
The specific embodiment nine: combine Fig. 1, Fig. 2 and Fig. 4～Fig. 6 explanation, the said acoustic board of this embodiment also comprises four support side plate 6; Said four support side plate 6 are installed on by panel 1, go up on four lateral surfaces of sandwich layer 2, papery thin layer 3, following sandwich layer 4 and backboard 5 formed composite plates.Play the certain structure supporting role, improve the compression strength of acoustic board and the function of preapring for an unfavorable turn of events.Other is identical with the specific embodiment one.
The said support structure plate 6 of this embodiment is processed by natural timber or wood-based plate for the wood materials of certain mechanical strength is arranged.
The specific embodiment ten: combine Fig. 6 explanation, the said acoustic board of this embodiment also comprises a plurality of support intermediate plates 7; Said a plurality of cross sections of going up sandwich layer 2 are between the hexagon cylindrical shell and a plurality of cross sections of following sandwich layer 4 are to be respectively arranged with a plurality of support intermediate plates 7 between the hexagon cylindrical shell.Can make laminboard layer increase bearing value, improve the compression strength of laminboard layer and the function of preapring for an unfavorable turn of events, can prevent bending, distortion, fracture phenomena, strengthen safety in utilization and service life.Other is identical with the specific embodiment nine.
The said support intermediate plate 7 of this embodiment is processed by natural timber or wood-based plate for the wood materials of certain mechanical strength is arranged.
Claims (10)
1. a variable cross-section double-deck sandwich broadband acoustic board of boring a hole; Said acoustic board comprises panel (1), goes up sandwich layer (2), papery thin layer (3), sandwich layer (4) and backboard (5) down, said panel (1), goes up sandwich layer (2), papery thin layer (3), time sandwich layer (4) and backboard (5) and from top to bottom bonds together successively; It is characterized in that: said panel (1) upper edge thickness direction is uniformly distributed with and is processed with a plurality of through holes; Each through hole is made up of minor diameter circular hole (1-1) and major diameter circular hole (1-2) or conical bore (1-3); Said minor diameter circular hole (1-1) is opened on the front of panel (1); Said major diameter circular hole (1-2) or conical bore (1-3) are opened on the back side of panel (1); The aperture of said minor diameter circular hole (1-1) equates that with the small end aperture of conical bore (1-3) said upward sandwich layer (2) and following sandwich layer (4) are cellular sandwich layer, and said cellular sandwich layer is made up of for the hexagon cylindrical shell is stitched together a plurality of cross sections; Each cross section is that the inner chamber of hexagon cylindrical shell is a honeycomb chamber, and a plurality of honeycomb chambers on said a plurality of honeycomb chambers and the following sandwich layer of going up on the sandwich layer (2) (4) and a plurality of through holes on the panel (1) are communicated with setting.
2. a kind of variable cross-section according to claim 1 double-deck sandwich broadband acoustic board of boring a hole, it is characterized in that: the punching rate of said panel (1) is 3～10%.
3. a kind of variable cross-section according to claim 1 and 2 double-deck sandwich broadband acoustic board of boring a hole, it is characterized in that: the aperture of each minor diameter circular hole (1-1) is 1～10mm; The aperture of each major diameter circular hole (1-2) is 3～20mm.
4. a kind of variable cross-section according to claim 1 double-deck sandwich broadband acoustic board of boring a hole, it is characterized in that: the thickness of said panel (1) is 5～20mm.
5. according to claim 1, the 2 or 4 described a kind of variable cross-sections double-deck sandwich broadband acoustic board of boring a hole, it is characterized in that: said panel (1) is in wood based panel, bamboo wood jigsaw, glued board, facing particieboard, facing fiberboard or the wood-plastic clad plate any one.
6. a kind of variable cross-section according to claim 1 double-deck sandwich broadband acoustic board of boring a hole is characterized in that: the said thickness of going up sandwich layer (2) and following sandwich layer (4) is 10～80mm.
7. according to claim 1 or the 6 described a kind of variable cross-sections double-deck sandwich broadband acoustic board of boring a hole, it is characterized in that: said sandwich layer (2) and the following sandwich layer (4) gone up is in the cellular sandwich layer of papery, aluminum alloy honeycomb shape sandwich layer or the frp honeycomb shape sandwich layer any one.
8. according to a kind of variable cross-section of claim said 1 double-deck sandwich broadband acoustic board of boring a hole, it is characterized in that: the thickness of said papery thin layer (3) is 0.1～2mm.
9. a kind of variable cross-section according to claim 1 double-deck sandwich broadband acoustic board of boring a hole, it is characterized in that: said acoustic board also comprises four support side plate (6); Said four support side plate (6) are installed on by panel (1), go up on four lateral surfaces of sandwich layer (2), papery thin layer (3), following sandwich layer (4) and the formed composite plate of backboard (5).
10. a kind of variable cross-section according to claim 9 double-deck sandwich broadband acoustic board of boring a hole, it is characterized in that: said acoustic board also comprises a plurality of support intermediate plates (7); Said a plurality of cross sections of going up sandwich layer (2) are between the hexagon cylindrical shell and a plurality of cross sections of following sandwich layer (4) are to be respectively arranged with a plurality of support intermediate plates (7) between the hexagon cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120254494U CN202137986U (en) | 2011-07-19 | 2011-07-19 | Variable cross-section perforated wideband acoustic board with double-layer sandwiches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120254494U CN202137986U (en) | 2011-07-19 | 2011-07-19 | Variable cross-section perforated wideband acoustic board with double-layer sandwiches |
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| Publication Number | Publication Date |
|---|---|
| CN202137986U true CN202137986U (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120254494U Expired - Fee Related CN202137986U (en) | 2011-07-19 | 2011-07-19 | Variable cross-section perforated wideband acoustic board with double-layer sandwiches |
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| CN (1) | CN202137986U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294847A (en) * | 2011-07-19 | 2011-12-28 | 东北林业大学 | Variable cross-section perforated broadband acoustic board with double core layers |
| CN106639061A (en) * | 2015-07-20 | 2017-05-10 | 江苏宇超电力工程有限公司 | Outdoor main transformer room sound insulation wall |
| US11257475B2 (en) | 2018-06-20 | 2022-02-22 | S.J. Morse Company | Micro-perforated wood veneer acoustic panel |
| US11649631B2 (en) * | 2019-03-13 | 2023-05-16 | Awi Licensing Llc | Dimensionally stable building panel |
-
2011
- 2011-07-19 CN CN201120254494U patent/CN202137986U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294847A (en) * | 2011-07-19 | 2011-12-28 | 东北林业大学 | Variable cross-section perforated broadband acoustic board with double core layers |
| CN106639061A (en) * | 2015-07-20 | 2017-05-10 | 江苏宇超电力工程有限公司 | Outdoor main transformer room sound insulation wall |
| US11257475B2 (en) | 2018-06-20 | 2022-02-22 | S.J. Morse Company | Micro-perforated wood veneer acoustic panel |
| US11649631B2 (en) * | 2019-03-13 | 2023-05-16 | Awi Licensing Llc | Dimensionally stable building panel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Harbin Bo Long Industrial Development Co., Ltd. Assignor: Northeast Forestry University Contract record no.: 2013230000945 Denomination of utility model: Variable cross-section perforated broadband acoustic board with double core layers Granted publication date: 20120208 License type: Exclusive License Record date: 20130529 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20140719 |
|
| EXPY | Termination of patent right or utility model |