CN205428487U - A metal sound insulation baffle for keeping apart flow noise under water - Google Patents
A metal sound insulation baffle for keeping apart flow noise under water Download PDFInfo
- Publication number
- CN205428487U CN205428487U CN201620022032.6U CN201620022032U CN205428487U CN 205428487 U CN205428487 U CN 205428487U CN 201620022032 U CN201620022032 U CN 201620022032U CN 205428487 U CN205428487 U CN 205428487U
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- vertical beam
- stainless steel
- ball valve
- steel ball
- flow noise
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Abstract
The utility model provides a metal sound insulation baffle for keeping apart flow noise under water, comprises a frame, the metal carton, high density polytetrafluoroethylene gasket, the stainless steel ball valve, the frame is by the entablature, the bottom end rail, zuo shuliang and right vertical beam form, , a left side all welds the double -screw bolt on erecting roof beam and right vertical beam, the metal carton is by the upper cover plate, lap down, the left side board, the right side board, preceding curb plate and posterior lateral plate welding are made, have on the metal carton and connect the ear, can be by the nut fastening on the frame, the outer silk of welding stainless steel round pipe double -end on the upper cover plate, external high density polytetrafluoroethylene gasket and stainless steel ball valve, can bleed to the metal carton, make the interior vacuum production of box. The utility model discloses pressure resistance is good, moreover not and take place electrochemical reaction between the hull, utilizes the interior air bed of vacuum layer and frame in the metal carton as the sound insulating layer, and in 4kHz -8kHz, the noise reduction generally more than 38dB, is applicable to the isolation of naval vessel sonar under -deck flow noise.
Description
Technical field
This utility model relates to a kind of baffle, particularly relates to a kind of metal sound insulation baffle for isolating flow noise under water, belongs to vibration damping de-noising field.
Background technology
When naval vessels high-speed cruising, propeller, the attached body of naval vessels etc. the flow noise produced can propagate to sonar transducer space, has a strong impact on the service behaviour of sonar；Owing to the sonar on naval vessel is immersed in water, if sound insulating method ripe in employing air removes design sound insulation baffle, then its sound insulation property is greatly reduced is affirmative, this is because water is heavy stream, bigger than the characteristic impedance of air 97800 times of the characteristic impedance of steel, bigger than the characteristic impedance of water 30 times, therefore, sound insulating method conventional in air is not suitable for using under water；Simultaneously, the sound insulation property evaluation methodology of acoustic hood in air, often the sound pressure level (dB (A)) using A note power reduces as index, and this index is to calculate the frequency response of sound wave based on human ear, is not appropriate for evaluating the sound-insulation capability of the baffle that insulates against sound under water；Furthermore, the metal material of sound insulation baffle employing in air, elastomeric material, the most only consider the parameter such as quality and damping, few water pressure resistance considering sound insulation baffle and resistance to corrosion；These factors do not have the sound insulation baffle that can use under water in causing current sonar transducer space.
Summary of the invention
The purpose of this utility model is to provide a kind of metal sound insulation baffle for isolating flow noise under water to the impact of sonar battle array service behaviour to isolate flow noise under water.
The purpose of this utility model is achieved in that and includes being connected, by entablature, left vertical beam, sill and right vertical beam, the framework formed, can is installed between left vertical beam and right vertical beam, described can is welded to form by upper cover plate, lower cover, right plate, left plate, front side board and back side panel, the outer silk of stainless pipe double end is set on described upper cover plate, the end of the outer silk of described stainless pipe double end connects stainless steel ball valve, and the junction of the outer silk of stainless pipe double end and stainless steel ball valve is provided with high density politef pad.
This utility model also includes so some architectural features:
1. described in, stainless steel ball valve is connected with vacuum pump.
Compared with prior art, the beneficial effects of the utility model are: both sides of the present utility model are aqueous medium, utilize the vacuum layer in can as sound insulating layer, owing to sound wave could must be propagated by way of medium, therefore do not have sound wave to propagate in can；Simultaneously, the characteristic impedance of the air layer in framework is much smaller than the characteristic impedance of water, utilize air and framework and the greatest differences of the characteristic impedance of outside water in framework, i.e. acoustic impedance severe mismatch, the sound reflecting making framework is very capable, sound transmission ability is the most weak, and above-mentioned both approaches has been well isolated from flow noise and has been incident to sonar transducer space, reduces the flow noise impact on sonar battle array service behaviour；The utility model proposes utilizes the outer wire connection high density teflon gasket of stainless pipe double end and stainless steel ball valve, can is bled, form vacuum layer, simplify the machining needs forming vacuum in can, easy to implement in easy and simple to handle, engineering；Meanwhile, this utility model utilizes can as sound insulating layer, good pressure-resistant performance, and is same material with hull, not and electrochemical reaction occurs between hull, will not accelerate the corrosion of hull.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model；
Fig. 2 is entablature schematic diagram of the present utility model；
Fig. 3 is left vertical beam schematic diagram of the present utility model；
Fig. 4 is that can of the present utility model overlooks direction schematic diagram；
Fig. 5 is can left view direction of the present utility model schematic diagram；
Fig. 6 is can generalized section of the present utility model；
Fig. 7 is the outer wire connection high density teflon gasket of stainless pipe double end of the present utility model and the schematic diagram of stainless steel ball valve；
Fig. 8 is Numerical Simulation Results figure of the present utility model.
In figure: 11 be entablature, 12 be sill, 13 be left vertical beam, 14 be right vertical beam, 15 be stud, 2 be can, 21 be upper cover plate, 22 be lower cover, 23 be front side board, 24 be back side panel, 25 be left plate, 26 be right plate, 27 be the outer silk of stainless pipe double end, 3 be high density teflon gasket, 4 be stainless steel ball valve.
Detailed description of the invention
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings.
In conjunction with Fig. 1 to Fig. 7, this utility model includes framework, can 2, high density teflon gasket 3, stainless steel ball valve 4, framework 1 is made up of entablature 11, sill 12, left vertical beam 13, right vertical beam 14, stud 15, and can 2 is made up of upper cover plate 21, lower cover 22, front side board 23, back side panel 24, left plate 25, right plate 26, the outer silk 27 of stainless pipe double end；Entablature 11, sill 12, left vertical beam 13 and right vertical beam 14 are rectangular steel pipe, and material is rustless steel, and the size of steel tube section is 50 × 40 × 3 (mm)；Entablature 11 and a length of 300mm of sill 12；Left vertical beam 13 and a length of 1880mm of right vertical beam 14, the long 44mm of two ends welding, wide 34mm, thickness are the iron plate of 3mm, make left vertical beam 13 and the closed at both ends of right vertical beam 14；Entablature 11 and sill 12 are respectively welded at left vertical beam 13 and the upper/lower terminal of right vertical beam 14, become quadrilateral structure；Outer surface welding screw 15 at left vertical beam 13 and right vertical beam 14, stud 15 arranges at equal intervals, stud 15 is centrally located at left vertical beam 13 and the center of right vertical beam 14 width, spacing is 50mm, specification is M10, stud 15 topmost is 65mm apart from the top of left vertical beam 13 or right vertical beam 14, and the stud 15 of bottom is 65mm apart from the bottom of left vertical beam 13 or right vertical beam 14；Can 2 is made up of upper cover plate 21, lower cover 22, front side board 23, back side panel 24, left plate 25, right plate 26, the outer silk 27 of stainless pipe double end, the size of upper cover plate 21 is 390 × 300 × 5 (mm), the size of lower cover 22 is 330 × 300 × 4 (mm), the size of front side board 23 is 322 × 11 × 4 (mm), the size of back side panel 24 is 322 × 11 × 4 (mm), the size of left plate 25 is 300 × 11 × 4 (mm), and the size of right plate 26 is 300 × 11 × 4 (mm)；Upper cover plate 21, lower cover 22 weld together with front side board 23, back side panel 24, left plate 25, right plate 26, the both sides making upper cover plate respectively reserve the space of 40mm, form the lug of can 2, six through holes are opened, the centre distance lug edge 20mm of through hole, a diameter of 11mm of through hole at lug, through hole equidistantly arranges, being spaced apart 50mm, through hole distance lug top topmost is 25mm, and the through hole distance lug bottom of bottom is 25mm；Open a through hole at the center of upper cover plate 21, the outer silk 27 of soldering stainless steel pipe double end, specification is DN6；High density teflon gasket 3 is annular, and thickness is 2mm, and internal diameter is 6mm, and external diameter is 9.7mm；The specification of stainless steel ball valve 4 is DN6, internal-screw ball valve；Framework 1 is vertically placed, the stud position of the through hole alignment frame 1 of can 2, can 2 can be loaded to framework 1, nut (M10) is utilized to be fastened on framework 1 by can 2, framework 1 can install six cans 2, cover high density teflon gasket 3 on the outer silk 27 of stainless pipe double end at upper cover plate 21, stainless steel ball valve 4 is inserted in, screws；Open stainless steel ball valve 4, connect vacuum pump (the present embodiment is not shown, and model is 2XZ-4), bleed, reaching capacity when bleeding pressure, closing stainless steel ball valve 4.
As shown in Figure 8: numerical simulation shows, after application this utility model, the noise reduction in 4000Hz-8000Hz frequency band range is generally at more than 38dB.
A kind of metal sound insulation baffle for isolating flow noise under water, including framework, can, high density teflon gasket, stainless steel ball valve, it is characterized in that, described framework is by entablature, sill, left vertical beam and right vertical beam composition, equal welding screw on left vertical beam and right vertical beam, described can is by upper cover plate, lower cover, left plate, right plate, front side board and back side panel composition, lug is had outside can, can be fastened on framework by nut, the outer silk of soldering stainless steel pipe double end on upper cover plate, external high density teflon gasket and stainless steel ball valve, can bleed in can, vacuum is formed in making can；
Entablature, sill, left vertical beam and right vertical beam in described framework is rectangular steel pipe, and material is rustless steel, and the size of steel tube section is 50 × 40 × 3 (mm)；
The two ends of entablature, sill, left vertical beam and right vertical beam in described framework are to close, the two ends of entablature are welded on the top of left vertical beam and right vertical beam, the two ends of sill are welded on the bottom of left vertical beam and right vertical beam, it is welded with stud in the center of left vertical beam and right vertical beam outside width direction, specification is M10, stud is uniform, is spaced apart 50mm, and stud is 65mm with the distance at left vertical beam and right vertical beam two ends；
Described upper cover plate a size of 390 × 300 × 5 (mm), lower cover a size of 330 × 300 × 4 (mm), left plate a size of 300 × 11 × 4 (mm), right plate a size of 300 × 11 × 4 (mm), front side board a size of 322 × 11 × 4 (mm), back side panel a size of 322 × 11 × 4 (mm)；
The outside of described upper cover plate is as the lug of can, uniform six through holes, and the spacing between through hole is 50mm, a diameter of 11mm of through hole, through hole centre-to-centre spacing upper cover plate edge 25mm, the edge 25mm of the through hole centre-to-centre spacing lower cover of bottom topmost；
A through hole is opened in the center of described upper cover plate, and the outer silk of through hole soldering stainless steel pipe double end, specification is DN6；
The outer wire connection stainless steel ball valve of described stainless pipe double end, specification is DN6；
Described stainless pipe double end is outer places high density teflon gasket between silk and stainless steel ball valve, pad is annular, and thickness is 2mm, and internal diameter is 6mm, and external diameter is 9.7mm；
The utility model discloses a kind of metal sound insulation baffle for isolating flow noise under water, including framework, can, high density teflon gasket, stainless steel ball valve, it is characterized in that, framework is by entablature, sill, left vertical beam and right vertical beam composition, equal welding screw on left vertical beam and right vertical beam, can is by upper cover plate, lower cover, left plate, right plate, front side board and back side panel welding are made, with lug on can, can be fastened on framework by nut, the outer silk of soldering stainless steel pipe double end on upper cover plate, external high density teflon gasket and stainless steel ball valve, can can be bled, vacuum is formed in making box；This good pressure-resistant performance being used for isolating the metal sound insulation baffle of flow noise under water, and there is electrochemical reaction not and between hull, utilize the vacuum layer in can and the air layer in framework as sound insulating layer, in 4kHz-8kHz, noise reduction is generally at more than 38dB, it is adaptable to the isolation of flow noise in naval vessel sonar transducer space.
Claims (2)
1. the metal sound insulation baffle being used for isolating flow noise under water, it is characterized in that: include by entablature, left vertical beam, sill and right vertical beam connect the framework of composition, can is installed between left vertical beam and right vertical beam, described can is by upper cover plate, lower cover, right plate, left plate, front side board and back side panel are welded to form, the outer silk of stainless pipe double end is set on described upper cover plate, the end of the outer silk of described stainless pipe double end connects stainless steel ball valve, and the junction of the outer silk of stainless pipe double end and stainless steel ball valve is provided with high density politef pad.
A kind of metal sound insulation baffle for isolating flow noise under water the most according to claim 1, it is characterised in that: described stainless steel ball valve is connected with vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620022032.6U CN205428487U (en) | 2016-01-12 | 2016-01-12 | A metal sound insulation baffle for keeping apart flow noise under water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620022032.6U CN205428487U (en) | 2016-01-12 | 2016-01-12 | A metal sound insulation baffle for keeping apart flow noise under water |
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| Publication Number | Publication Date |
|---|---|
| CN205428487U true CN205428487U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620022032.6U Expired - Fee Related CN205428487U (en) | 2016-01-12 | 2016-01-12 | A metal sound insulation baffle for keeping apart flow noise under water |
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| CN (1) | CN205428487U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108357628A (en) * | 2018-02-05 | 2018-08-03 | 哈尔滨工程大学 | A kind of denoising device suitable for the underwater sonar of hull bottom |
| CN109256113A (en) * | 2018-06-29 | 2019-01-22 | 中国船舶重工集团公司第七〇五研究所 | A kind of overflow-type flextensional transducer baffle grillage |
| CN110689872A (en) * | 2019-09-24 | 2020-01-14 | 哈尔滨工程大学 | Method for reducing noise of working environment of underwater detection equipment |
-
2016
- 2016-01-12 CN CN201620022032.6U patent/CN205428487U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108357628A (en) * | 2018-02-05 | 2018-08-03 | 哈尔滨工程大学 | A kind of denoising device suitable for the underwater sonar of hull bottom |
| CN109256113A (en) * | 2018-06-29 | 2019-01-22 | 中国船舶重工集团公司第七〇五研究所 | A kind of overflow-type flextensional transducer baffle grillage |
| CN109256113B (en) * | 2018-06-29 | 2020-12-01 | 杭州瑞声海洋仪器有限公司 | Overflow type flextensional transducer sound barrier plate frame structure |
| CN110689872A (en) * | 2019-09-24 | 2020-01-14 | 哈尔滨工程大学 | Method for reducing noise of working environment of underwater detection equipment |
| CN110689872B (en) * | 2019-09-24 | 2022-01-28 | 哈尔滨工程大学 | Method for reducing noise of working environment of underwater detection equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20180112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |