CN203366730U - Sound insulation cover - Google Patents
Sound insulation cover Download PDFInfo
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- CN203366730U CN203366730U CN 201320453282 CN201320453282U CN203366730U CN 203366730 U CN203366730 U CN 203366730U CN 201320453282 CN201320453282 CN 201320453282 CN 201320453282 U CN201320453282 U CN 201320453282U CN 203366730 U CN203366730 U CN 203366730U
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Abstract
The utility model discloses a sound insulation cover. The sound insulation cover comprises a cover body on which a lead wire hole is arranged, and a plurality of engaging lugs are fixed at the outer sides of the bottom of the cover body. The cover body is composed of a metal plate, a connection layer and a porous material layer which are arranged orderly from outside to inside, and the metal plate and the porous material layer are connected via the connection layer. The sound insulation cover of the utility model is simple in structure, reasonable in design and simple and convenient in use and operation. The metal plate resists the influence of the external noise on the internal electronic components and reduces the outward radiation of the internal noise of the cover body, the connection layer realizes a certain sound insulation effect, and the porous material layer possesses a better sound absorption effect and a very good vibration damping effect to thereby realize the sound insulation and vibration damping effects on the electronic components. The sound insulation cover of the utility model has a highest sound insulation factor up to 50 dB, is obvious in sound insulation effect, high in overall intensity, small in size and light in mass, at the same time is high temperature resistant.
Description
Technical field
The utility model relates to a kind of sound arrester, especially relates to a kind of acoustic hood that electronic devices and components is played to fine defening effect.
Background technology
Along with social progress and scientific and technical development, people are more and more higher to the reliability requirement of electronic equipment, electronic devices and components.And the main source that affects at present the electronic devices and components reliability is noise, the noise source of noise has two kinds: the first is already present noise in external environment; The second is the self-excited oscillation noise that electronic devices and components produce in the course of the work, and these two kinds of noises are greatly affected the precision of its output signal, thereby has reduced the reliability of whole instrument.Also do not have at present effective method to be prevented and treated it, it is impossible in the electronic devices and components space of several millimeters less, exhaust box being installed, and the cost that the electronic devices and components structure is reequiped is also larger.And mainly there is following shortcoming in existing acoustic hood: (1), at cover body under thinner thickness condition, defening effect is poor, can not well realize the sound insulation to electronic devices and components; (2) the acoustic hood volume is large, and quality is large, and resistance to elevated temperatures is poor; (3) use inconvenient operation, bulk strength is low.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, a kind of acoustic hood is provided, it is simple in structure, reasonable in design and use easy and simple to handle, resist the impact of outside noise on internal electronic component by sheet metal, reduce the cover body internal noise to external radiation, articulamentum play certain sound insulation effect and porous material layer have preferably sound absorption and well damping effect realize the sound insulation vibration damping to electronic devices and components, the highest oise insulation factor reaches 50dB, defening effect is obvious, bulk strength is high simultaneously, high temperature resistant, volume is little, quality is light.
For achieving the above object, the technical solution adopted in the utility model is: a kind of acoustic hood, it is characterized in that: comprise cover body, have fairlead on described cover body, the bottom outside of described cover body is fixed with a plurality of engaging lugs, described cover body is comprised of the sheet metal set gradually from outside to inside, articulamentum and porous material layer, and described sheet metal is connected by articulamentum with porous material layer.
Above-mentioned a kind of acoustic hood, it is characterized in that: the outer shape of described cover body is cuboid, described cover body is by base plate, top board, front side board, back side panel, left plate and right plate form, described base plate is by the first sheet metal, the first articulamentum and the first porous material layer form, described the first sheet metal is connected by the first articulamentum with the first porous material layer, a plurality of described engaging lugs all are fixed on the outside of the first sheet metal, described fairlead is opened on top board, described top board is by the second sheet metal, the second articulamentum and the second porous material layer form, described the second sheet metal is connected by the second articulamentum with the second porous material layer, the structure of described front side board and back side panel is identical and by the 3rd sheet metal, the 3rd articulamentum and the 3rd porous material layer form, described the 3rd sheet metal is connected by the 3rd articulamentum with the 3rd porous material layer, the structure of described left plate and right plate is identical and by the 4th sheet metal, the 4th articulamentum and the 4th porous material layer form, described the 4th sheet metal is connected by the 4th articulamentum with the 4th porous material layer, described the first sheet metal and the 3rd sheet metal and the 4th sheet metal all removably connect, between described the 3rd sheet metal and the 4th sheet metal, between the 3rd sheet metal and the second sheet metal and between the 4th sheet metal and the second sheet metal, all weld.
Above-mentioned a kind of acoustic hood, it is characterized in that: the both sides, front and back of described the first sheet metal all have a plurality of the first bolts hole, the bottom of described the 3rd sheet metal has a plurality of second bolts hole corresponding with the first bolt hole position, and described the first sheet metal is fixedly connected with first bolt of the 3rd sheet metal through passing successively the second bolt hole and the first bolt hole; The left and right sides of described the first sheet metal all has a plurality of the 3rd bolts hole, the bottom of described the 4th sheet metal has a plurality of four bolts hole corresponding with the 3rd bolt hole position, and described the first sheet metal is fixedly connected with the second bolt of the 3rd bolt hole through passing successively the 4th bolt hole with the 4th sheet metal.
Above-mentioned a kind of acoustic hood, it is characterized in that: on four angles of described the first sheet metal, be provided with lower rubber cushion blocks, described lower rubber cushion blocks and the first porous material layer close contact, the upper surface of outstanding the first porous material layer of the upper surface of described lower rubber cushion blocks.
Above-mentioned a kind of acoustic hood, it is characterized in that: on four angles of described the second sheet metal, be provided with rubber cushion blocks, described upper rubber cushion blocks and the second porous material layer close contact, the lower surface of outstanding the second porous material layer of the lower surface of described upper rubber cushion blocks.
Above-mentioned a kind of acoustic hood is characterized in that: the quantity of described engaging lug is four, and four described engaging lug symmetries are fixed on four angles in the first sheet metal outside.
Above-mentioned a kind of acoustic hood, it is characterized in that: described the first sheet metal, the second sheet metal, the 3rd sheet metal and the 4th sheet metal are corrosion resistant plate, copper coin, nickel plate, titanium plate or siderochrome aluminium sheet, and the thickness of described sheet metal, the second sheet metal, the 3rd sheet metal and the 4th sheet metal is 0.5mm～3mm.
Above-mentioned a kind of acoustic hood, it is characterized in that: described the first articulamentum, the second articulamentum, the 3rd articulamentum and the 4th articulamentum are powder of stainless steel layer, copper powders layer, nickel by powder layer, ti powder layer or ferrum-chromium-aluminum powder bed, and the thickness of described the first articulamentum, the second articulamentum, the 3rd articulamentum and the 4th articulamentum is 0.2mm～0.5mm.
Above-mentioned a kind of acoustic hood, it is characterized in that: described the first porous material layer, the second porous material layer, the 3rd porous material layer and the 4th porous material layer are that factor of porosity is 70%～95%, string diameter is the metal fiber polyporous material layer of 2 μ m～500 μ m, and the thickness of described the first porous material layer, the second porous material layer, the 3rd porous material layer and the 4th porous material layer is 1mm～80mm.
Above-mentioned a kind of acoustic hood is characterized in that: described metal fiber polyporous material layer is stainless steel fibre porous material layer, copper fiber multihole material layer, nickel fiber multihole material layer, titanium fiber multihole material layer or iron-chromium-aluminum porous material layer.
The utility model compared with prior art has the following advantages:
1, the utility model is simple in structure, reasonable in design and volume is little, quality is light.
2, the utlity model has good mechanical property, between sheet metal and porous material layer, adhesion is strong, and in installation and use procedure, contamination-free produces, and processing and manufacturing is simple.
3, the utility model is resisted the impact of outside noise on internal electronic component by sheet metal, reduce the cover body internal noise to external radiation, articulamentum play certain sound insulation effect and porous material layer have preferably sound absorption and well damping effect realize the sound insulation vibration damping to electronic devices and components, the highest oise insulation factor reaches 50dB, and defening effect is obvious.
4, the utility model is used easy and simple to handle, during use, the base plate of cover body is connected with base station by otic placode, the electronic devices and components for the treatment of vibration damping are placed on base plate, the case that then will be comprised of top board, front side board, back side panel, left plate and right plate covers on electronic devices and components, and case is fixedly connected with and gets final product with base plate.
5, the utility model bulk strength is high, high temperature resistant, applicable to the high temperature applied environment.
6, the utility model can not only well be applicable to the miniature electric components and parts are produced in vibration processes the sound insulation vibration damping of noise, and also can be used for the sound insulation vibration damping of electronic components and parts or other equipment.
Below by drawings and Examples, the utility model is described in further detail.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The upward view that Fig. 2 is Fig. 1.
The structural representation that Fig. 3 is the utility model base plate.
The front view that Fig. 4 is Fig. 3.
The A-A cut-open view that Fig. 5 is Fig. 3.
The left view that Fig. 6 is Fig. 3.
The structural representation that Fig. 7 is the utility model top board.
The front view that Fig. 8 is Fig. 7.
The B-B cut-open view that Fig. 9 is Fig. 7.
The structural representation that Figure 10 is the utility model front side board, back side panel.
The C-C cut-open view that Figure 11 is Figure 10.
The structural representation that Figure 12 is the utility model left plate, right plate.
The D-D cut-open view that Figure 13 is Figure 12.
Description of reference numerals:
1-1-base plate; 1-2-top board; 1-3-front side board;
1-4-back side panel; 1-5-left plate; 1-6-right plate;
2-fairlead; 3-engaging lug; 4-1-first sheet metal;
4-2-second sheet metal; 4-3-the 3rd sheet metal; 4-4-the 4th sheet metal;
5-1-first articulamentum; 5-2-second articulamentum; 5-3-the 3rd articulamentum;
5-4-the 4th articulamentum; 6-1-first porous material layer; 6-2-second porous material layer;
6-3-the 3rd porous material layer; 6-4-the 4th porous material layer; The 7-the first bolt hole;
The 8-the second bolt hole; The 9-the first bolt; 10-lower rubber cushion blocks;
11-upper rubber cushion blocks; The 12-the three bolt hole; The 13-the four bolt hole;
The 14-the second bolt.
Embodiment
As depicted in figs. 1 and 2, the utility model comprises cover body, have fairlead 2 on described cover body, the bottom outside of described cover body is fixed with a plurality of engaging lugs 3, described cover body is comprised of the sheet metal set gradually from outside to inside, articulamentum and porous material layer, and described sheet metal is connected by articulamentum with porous material layer.
As shown in figure 1 to figure 13, the outer shape of described cover body is cuboid, described cover body is by base plate 1-1, top board 1-2, front side board 1-3, back side panel 1-4, left plate 1-5 and right plate 1-6 form, described base plate 1-1 is by the first sheet metal 4-1, the first articulamentum 5-1 and the first porous material layer 6-1 form, described the first sheet metal 4-1 is connected by the first articulamentum 5-1 with the first porous material layer 6-1, a plurality of described engaging lugs 3 all are fixed on the outside of the first sheet metal 4-1, described fairlead 2 is opened on top board 1-2, described top board 1-2 is by the second sheet metal 4-2, the second articulamentum 5-2 and the second porous material layer 6-2 form, described the second sheet metal 4-2 is connected by the second articulamentum 5-2 with the second porous material layer 6-2, the structure of described front side board 1-3 and back side panel 1-4 is identical and by the 3rd sheet metal 4-3, the 3rd articulamentum 5-3 and the 3rd porous material layer 6-3 form, described the 3rd sheet metal 4-3 is connected by the 3rd articulamentum 5-3 with the 3rd porous material layer 6-3, the structure of described left plate 1-5 and right plate 1-6 is identical and by the 4th sheet metal 4-4, the 4th articulamentum 5-4 and the 4th porous material layer 6-4 form, described the 4th sheet metal 4-4 is connected by the 4th articulamentum 5-4 with the 4th porous material layer 6-4, described the first sheet metal 4-1 and the 3rd sheet metal 4-3 and the 4th sheet metal 4-4 all removably connect, between described the 3rd sheet metal 4-3 and the 4th sheet metal 4-4, between the 3rd sheet metal 4-3 and the second sheet metal 4-2 and between the 4th sheet metal 4-4 and the second sheet metal 4-2, all weld.
As shown in Fig. 1, Fig. 4, Fig. 6, Figure 10 and Figure 12, the both sides, front and back of described the first sheet metal 4-1 all have a plurality of the first bolts hole 7, the bottom of described the 3rd sheet metal 4-3 has a plurality of second bolts hole 8 corresponding with the first bolt hole 7 positions, and described the first sheet metal 4-1 is fixedly connected with first bolt 9 of the 3rd sheet metal 4-3 through passing successively the second bolt hole 8 and the first bolt hole 7; The left and right sides of described the first sheet metal 4-1 all has a plurality of the 3rd bolts hole 12, the bottom of described the 4th sheet metal 4-4 has a plurality of four bolts hole 13 corresponding with the 3rd bolt hole 12 positions, and described the first sheet metal 4-1 is fixedly connected with second bolt 14 of the 4th sheet metal 4-4 through passing successively the 4th bolt hole 13 and the 3rd bolt hole 12.
As shown in Fig. 3 to Fig. 9, be provided with lower rubber cushion blocks 10 on four angles of described the first sheet metal 4-1, described lower rubber cushion blocks 10 and the first porous material layer 6-1 close contact, the upper surface of outstanding the first porous material layer 6-1 of the upper surface of described lower rubber cushion blocks 10; Be provided with rubber cushion blocks 11 on four angles of described the second sheet metal 4-2, described upper rubber cushion blocks 11 and the second porous material layer 6-2 close contact, the lower surface of outstanding the second porous material layer 6-2 of the lower surface of described upper rubber cushion blocks 11.The poor flexibility of the first porous material layer 6-1 and the second porous material layer 6-2; in vibration processes, be difficult to recover; by the rubber cushion blocks 10 of outstanding the first porous material layer 6-1 upper surface of upper surface is set; and the upper rubber cushion blocks 11 of outstanding the second porous material layer 6-2 lower surface of lower surface can effectively suppress the destruction of electronic devices and components to the first porous material layer 6-1 and the second porous material layer 6-2, and then the first porous material layer 6-1 and the second porous material layer 6-2 are played a good protection.
As shown in Figure 3, the quantity of described engaging lug 3 is four, and four described engaging lug 3 symmetries are fixed on four angles in the first sheet metal 4-1 outside, for the base station that is fixed on that cover body is stable.
In the present embodiment, described the first sheet metal 4-1, the second sheet metal 4-2, the 3rd sheet metal 4-3 and the 4th sheet metal 4-4 are corrosion resistant plate, copper coin, nickel plate, titanium plate or siderochrome aluminium sheet, and the thickness of described sheet metal 4-1, the second sheet metal 4-2, the 3rd sheet metal 4-3 and the 4th sheet metal 4-4 is 0.5mm～3mm.
In the present embodiment, described the first articulamentum 5-1, the second articulamentum 5-2, the 3rd articulamentum 5-3 and the 4th articulamentum 5-4 are powder of stainless steel layer, copper powders layer, nickel by powder layer, ti powder layer or ferrum-chromium-aluminum powder bed, and the thickness of described the first articulamentum 5-1, the second articulamentum 5-2, the 3rd articulamentum 5-3 and the 4th articulamentum 5-4 is 0.2mm～0.5mm.
In the present embodiment, described the first porous material layer 6-1, the second porous material layer 6-2, the 3rd porous material layer 6-3 and the 4th porous material layer 6-4 are that factor of porosity is 70%～95%, string diameter is the metal fiber polyporous material layer of 2 μ m～500 μ m, and the thickness of described the first porous material layer 6-1, the second porous material layer 6-2, the 3rd porous material layer 6-3 and the 4th porous material layer 6-4 is 1mm～80mm.
In the present embodiment, described metal fiber polyporous material layer is stainless steel fibre porous material layer, copper fiber multihole material layer, nickel fiber multihole material layer, titanium fiber multihole material layer or iron-chromium-aluminum porous material layer.
Principle of work of the present utility model is: during use, turn on the first bolt 9 and the second bolt 14, take away by top board 1-2, front side board 1-3, back side panel 1-4, the case that left plate 1-5 and right plate 1-6 form, base plate 1-1 is fixed on base station by a plurality of engaging lugs 3, then will treat that the vibration damping electronic devices and components are placed on base plate 1-1, again will be by top board 1-2, front side board 1-3, back side panel 1-4, the case that left plate 1-5 and right plate 1-6 form covers on to be treated on the vibration damping electronic devices and components, then the connecting line of vibration damping electronic devices and components is drawn from fairlead 2, finally by the first bolt 9, with the second bolt 14, case is fixedly connected with and gets final product with base plate 1-1.In the utility model, the first sheet metal 4-1, the second sheet metal 4-2, the 3rd sheet metal 4-3 and the 4th sheet metal 4-4 can effectively reduce its cover body internal noise to external radiation, the first porous material layer 6-1 can adopt the activated sintering technology that the first sheet metal 4-1 and the first articulamentum 5-1 are sintered together under hot conditions, the second articulamentum 5-2 can adopt the activated sintering technology that the second sheet metal 4-2 and the second porous material layer 6-2 are sintered together under hot conditions, the 3rd articulamentum 5-3 can adopt the activated sintering technology that the 3rd sheet metal 4-3 and the 3rd porous material layer 6-3 are sintered together under hot conditions, the 4th articulamentum 5-4 can adopt the activated sintering technology that the 4th sheet metal 4-4 and the 4th porous material layer 6-4 are sintered together under hot conditions, bond strength is high, heat and corrosion resistant, anti-oxidant, long service life, not only can make sheet metal become as a whole with porous material layer, can also play certain sound insulation effect, the first porous material layer 6-1, the second porous material layer 6-2, the 3rd porous material layer 6-3 and the 4th porous material layer 6-4 not only have sound absorption preferably, also have good damping effect.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification, change and equivalent structure transformation of above embodiment being done according to the utility model technical spirit, all still belong in the protection domain of technical solutions of the utility model.
Claims (10)
1. an acoustic hood, it is characterized in that: comprise cover body, have fairlead (2) on described cover body, the bottom outside of described cover body is fixed with a plurality of engaging lugs (3), described cover body is comprised of the sheet metal set gradually from outside to inside, articulamentum and porous material layer, and described sheet metal is connected by articulamentum with porous material layer.
2. according to a kind of acoustic hood claimed in claim 1, it is characterized in that: the outer shape of described cover body is cuboid, described cover body is by base plate (1-1), top board (1-2), front side board (1-3), back side panel (1-4), left plate (1-5) and right plate (1-6) form, described base plate (1-1) is by the first sheet metal (4-1), the first articulamentum (5-1) and the first porous material layer (6-1) form, described the first sheet metal (4-1) is connected by the first articulamentum (5-1) with the first porous material layer (6-1), a plurality of described engaging lugs (3) all are fixed on the outside of the first sheet metal (4-1), described fairlead (2) is opened on top board (1-2), described top board (1-2) is by the second sheet metal (4-2), the second articulamentum (5-2) and the second porous material layer (6-2) form, described the second sheet metal (4-2) is connected by the second articulamentum (5-2) with the second porous material layer (6-2), the structure of described front side board (1-3) and back side panel (1-4) is identical and by the 3rd sheet metal (4-3), the 3rd articulamentum (5-3) and the 3rd porous material layer (6-3) form, described the 3rd sheet metal (4-3) is connected by the 3rd articulamentum (5-3) with the 3rd porous material layer (6-3), the structure of described left plate (1-5) and right plate (1-6) is identical and by the 4th sheet metal (4-4), the 4th articulamentum (5-4) and the 4th porous material layer (6-4) form, described the 4th sheet metal (4-4) is connected by the 4th articulamentum (5-4) with the 4th porous material layer (6-4), described the first sheet metal (4-1) all removably connects with the 3rd sheet metal (4-3) and the 4th sheet metal (4-4), between described the 3rd sheet metal (4-3) and the 4th sheet metal (4-4), between the 3rd sheet metal (4-3) and the second sheet metal (4-2) and between the 4th sheet metal (4-4) and the second sheet metal (4-2), all weld.
3. according to a kind of acoustic hood claimed in claim 2, it is characterized in that: the both sides, front and back of described the first sheet metal (4-1) all have a plurality of the first bolts hole (7), the bottom of described the 3rd sheet metal (4-3) has a plurality of second bolts hole (8) corresponding with the first bolt hole (7) position, and described the first sheet metal (4-1) is fixedly connected with first bolt (9) of the 3rd sheet metal (4-3) through passing successively the second bolt hole (8) and the first bolt hole (7); The left and right sides of described the first sheet metal (4-1) all has a plurality of the 3rd bolts hole (12), the bottom of described the 4th sheet metal (4-4) has a plurality of four bolts hole (13) corresponding with the 3rd bolt hole (12) position, and described the first sheet metal (4-1) is fixedly connected with second bolt (14) of the 3rd bolt hole (12) through passing successively the 4th bolt hole (13) with the 4th sheet metal (4-4).
4. according to the described a kind of acoustic hood of claim 2 or 3, it is characterized in that: on four angles of described the first sheet metal (4-1), be provided with lower rubber cushion blocks (10), described lower rubber cushion blocks (10) and the first porous material layer (6-1) close contact, the upper surface of outstanding the first porous material layer (6-1) of the upper surface of described lower rubber cushion blocks (10).
5. according to the described a kind of acoustic hood of claim 2 or 3, it is characterized in that: on four angles of described the second sheet metal (4-2), be provided with rubber cushion blocks (11), described upper rubber cushion blocks (11) and the second porous material layer (6-2) close contact, the lower surface of outstanding the second porous material layer (6-2) of the lower surface of described upper rubber cushion blocks (11).
6. according to the described a kind of acoustic hood of claim 2 or 3, it is characterized in that: the quantity of described engaging lug (3) is four, and four described engaging lugs (3) symmetry is fixed on four angles in the first sheet metal (4-1) outside.
7. according to the described a kind of acoustic hood of claim 2 or 3, it is characterized in that: described the first sheet metal (4-1), the second sheet metal (4-2), the 3rd sheet metal (4-3) and the 4th sheet metal (4-4) are corrosion resistant plate, copper coin, nickel plate, titanium plate or siderochrome aluminium sheet, and the thickness of described sheet metal (4-1), the second sheet metal (4-2), the 3rd sheet metal (4-3) and the 4th sheet metal (4-4) is 0.5mm～3mm.
8. according to the described a kind of acoustic hood of claim 2 or 3, it is characterized in that: described the first articulamentum (5-1), the second articulamentum (5-2), the 3rd articulamentum (5-3) and the 4th articulamentum (5-4) are powder of stainless steel layer, copper powders layer, nickel by powder layer, ti powder layer or ferrum-chromium-aluminum powder bed, and the thickness of described the first articulamentum (5-1), the second articulamentum (5-2), the 3rd articulamentum (5-3) and the 4th articulamentum (5-4) is 0.2mm～0.5mm.
9. according to the described a kind of acoustic hood of claim 2 or 3, it is characterized in that: described the first porous material layer (6-1), the second porous material layer (6-2), the 3rd porous material layer (6-3) and the 4th porous material layer (6-4) are that factor of porosity is 70%～95%, string diameter is the metal fiber polyporous material layer of 2 μ m～500 μ m, and the thickness of described the first porous material layer (6-1), the second porous material layer (6-2), the 3rd porous material layer (6-3) and the 4th porous material layer (6-4) is 1mm～80mm.
10. according to a kind of acoustic hood claimed in claim 9, it is characterized in that: described metal fiber polyporous material layer is stainless steel fibre porous material layer, copper fiber multihole material layer, nickel fiber multihole material layer, titanium fiber multihole material layer or iron-chromium-aluminum porous material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320453282 CN203366730U (en) | 2013-07-27 | 2013-07-27 | Sound insulation cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320453282 CN203366730U (en) | 2013-07-27 | 2013-07-27 | Sound insulation cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203366730U true CN203366730U (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320453282 Expired - Fee Related CN203366730U (en) | 2013-07-27 | 2013-07-27 | Sound insulation cover |
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| CN (1) | CN203366730U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240694A (en) * | 2014-09-03 | 2014-12-24 | 江苏海事职业技术学院 | Noise enclosure capable of being lifted away |
| CN104538022A (en) * | 2014-12-25 | 2015-04-22 | 哈尔滨工程大学 | Acoustic shield based on acoustic wave band gap features of generalized photonic crystal semi-cylinder shells |
| CN104575481A (en) * | 2014-12-25 | 2015-04-29 | 哈尔滨工程大学 | Acoustic shield based on sound wave band gap characteristics of generalized phononic crystal hemispherical shells |
-
2013
- 2013-07-27 CN CN 201320453282 patent/CN203366730U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240694A (en) * | 2014-09-03 | 2014-12-24 | 江苏海事职业技术学院 | Noise enclosure capable of being lifted away |
| CN104240694B (en) * | 2014-09-03 | 2017-06-16 | 江苏海事职业技术学院 | Lift-away blimp |
| CN104538022A (en) * | 2014-12-25 | 2015-04-22 | 哈尔滨工程大学 | Acoustic shield based on acoustic wave band gap features of generalized photonic crystal semi-cylinder shells |
| CN104575481A (en) * | 2014-12-25 | 2015-04-29 | 哈尔滨工程大学 | Acoustic shield based on sound wave band gap characteristics of generalized phononic crystal hemispherical shells |
| CN104538022B (en) * | 2014-12-25 | 2017-08-04 | 哈尔滨工程大学 | A kind of acoustic hood based on broad sense phonon crystal attached column shell acoustic band gap characteristic |
| CN104575481B (en) * | 2014-12-25 | 2018-07-24 | 哈尔滨工程大学 | A kind of acoustic hood based on broad sense phonon crystal hemispherical Shell acoustic band gap characteristic |
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