CN106653286B - A kind of American Unit Substation noise-reduction case - Google Patents

A kind of American Unit Substation noise-reduction case Download PDF

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Publication number
CN106653286B
CN106653286B CN201610850532.3A CN201610850532A CN106653286B CN 106653286 B CN106653286 B CN 106653286B CN 201610850532 A CN201610850532 A CN 201610850532A CN 106653286 B CN106653286 B CN 106653286B
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China
Prior art keywords
noise
sound
noise reduction
layer
acoustical panel
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Active
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CN201610850532.3A
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Chinese (zh)
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CN106653286A (en
Inventor
顾海青
马志华
陈伟明
俞志刚
张昊
唐本超
魏玮
傅道峰
陈馨薇
叶茂林
齐亮
王玮鑫
马士新
顾伟
管文博
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State Grid Shanghai Electric Power Co Ltd
Shanghai Zhixin Electric Amorphous Co Ltd
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State Grid Shanghai Electric Power Co Ltd
Shanghai Zhixin Electric Amorphous Co Ltd
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Application filed by State Grid Shanghai Electric Power Co Ltd, Shanghai Zhixin Electric Amorphous Co Ltd filed Critical State Grid Shanghai Electric Power Co Ltd
Priority to CN201610850532.3A priority Critical patent/CN106653286B/en
Publication of CN106653286A publication Critical patent/CN106653286A/en
Application granted granted Critical
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/33Arrangements for noise damping

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The present invention relates to a kind of American Unit Substation noise-reduction case, acoustical panel including top, the acoustical panel in left side, the acoustical panel on right side, the acoustical panel of rear side, front sound-deadening louver, metal bottom seat frame, the bottom of the acoustical panel of rear side is provided with noise reduction inlet box, the side of the close noise reduction inlet box of the acoustical panel at top goes out gas tank provided with noise reduction, the top of the one end for the acoustical panel that noise reduction goes out at the top of gas tank pass-out is provided with rain-proof cover, rain-proof cover and noise reduction are provided with exhaust clearance between going out one end of the acoustical panel at the top of gas tank pass-out, front sound-deadening louver includes shutter outer layer, noise-reduction inner cord, the acoustical panel at top, the acoustical panel in left side, the acoustical panel on right side, the acoustical panel of rear side, front sound-deadening louver combines that to be formed can be with the noise reduction shell of outside air convection, noise reduction outer shell base is located in metal bottom seat frame.The design that the present invention is combined using noise-reducing structure with aeration structure, there is the characteristics of noise reduction, good heat dissipation effect.

Description

A kind of American Unit Substation noise-reduction case
Technical field
The present invention relates to a kind of American Unit Substation housing, more particularly to it is a kind of can effective control noise American Unit Substation drop Make an uproar housing, belong to electric power box and become device field.
Background technology
With the common device that noise reduction shell is American Unit Substation noise reduction, it can effectively reduce American-type box and exchange work American Unit Substation As when be delivered to the noise of external environment condition, with the continuous improvement of people's environmental consciousness, American Unit Substation noise pollution problem is increasingly Attract attention.Current existing noise reduction shell, the especially outdoor American Unit Substation usual noise reduction unobvious of noise reduction shell.It is beautiful When formula case becomes operation, it can be passed to by the flexible caused noise of iron core magnetic hysteresis and vibration by base on outer cover body, so that beautiful Formula case change noise reduction becomes a new noise source, and this just adds the noise of American Unit Substation, currently used method master indirectly It is utilized in case change housing and sets up the quieter materials such as foamed glue or silencing cotton to reduce noise, but after installing noise reduction shell The problem of temperature rise of American Unit Substation cannot be solved effectively always, to the normal operation of American Unit Substation and the related behaviour of staff Adversely affect.Therefore, it is preferable how to provide a kind of noise reduction, and the shell for not influenceing American Unit Substation temperature rise is this Art personnel need the important technological problems solved at present.
Publication number is that CN204204556U patent document discloses a kind of low noise audio amplifier change housing, including base, top cover And side wall, side wall ecto-entad are sequentially provided with shell body, noise reduction layer, inner housing and airstrainer, interior shell surface scribbles anti- High-temperature oxydation coating, inner housing are covered with mesopore, multiple spring dampers are provided with the bottom groove of base, the spring shock absorption The backing plate of the common carrying of installation one transformer at the top of device, the top of the backing plate is additionally provided with a dust at airstrainer Box, air knife is also set up in the top cover directly over dust-collecting box, noise reduction layer is made up of spray polyurethane foam, and can progressively decay transformation The noise that device room is transmitted.The problem of assembling troublesome maintenance is brought while program noise reduction.
The content of the invention
American Unit Substation of the present invention discloses new scheme with noise-reduction case, is combined using noise-reducing structure with aeration structure The problem of design, solving existing American Unit Substation housing noise reduction unobvious, and device radiation influenceed after installation noise reduction shell.
American Unit Substation of the present invention with noise-reduction case include the acoustical panel at top, the acoustical panel in left side, right side acoustical panel, after The acoustical panel of side, front sound-deadening louver, metal bottom seat frame, the bottom of the acoustical panel of rear side are provided with noise reduction inlet box, top The side of the close noise reduction inlet box of acoustical panel goes out gas tank, the one end for the acoustical panel that noise reduction goes out at the top of gas tank pass-out provided with noise reduction Top be provided with rain-proof cover, rain-proof cover and noise reduction are provided with exhaust clearance between going out one end of the acoustical panel at the top of gas tank pass-out, front Sound-deadening louver includes shutter outer layer, noise-reduction inner cord, the noise reduction of the acoustical panel at top, the acoustical panel in left side, right side Plate, the acoustical panel of rear side, front sound-deadening louver combine to be formed and can set with the noise reduction shell of outside air convection, noise reduction outer shell base In metal bottom seat frame.
American Unit Substation of the present invention uses the design that is combined with aeration structure of noise-reducing structure with noise-reduction case, with noise reduction, The characteristics of good heat dissipation effect.
Brief description of the drawings
Fig. 1 is the schematic front view of this programme American Unit Substation noise-reduction case.
Fig. 2 is the schematic top plan view of American Unit Substation noise-reduction case in Fig. 1.
Fig. 3 is the left view schematic diagram of American Unit Substation noise-reduction case in Fig. 1.
Fig. 4 is the structural representation of acoustical panel.
Wherein, 1 be top acoustical panel, 2 be that noise reduction goes out gas tank, and 3 be the acoustical panel in left side, and 4 be the acoustical panel on right side, 5 It is the acoustical panel of rear side, 6 be noise reduction inlet box, and 7 be front sound-deadening louver, and 8 be metal bottom seat frame, and 111 be flame-retardant gypsum board A, 112 be flame-retardant gypsum board B, and 121 be sound-absorbing non-woven fabrics A, and 122 be sound-absorbing non-woven fabrics B, and 131 be fire-retardant sound-absorbing orifice plate A, and 132 are Fire-retardant sound-absorbing orifice plate B, 140 be acoustical cotton layer, and 141 be I-shaped keel, and 151 be stainless steel metal panel A.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figures 1 to 3, the schematic diagram of American Unit Substation noise-reduction case of the present invention.American Unit Substation is included with noise-reduction case The acoustical panel at top, the acoustical panel in left side, the acoustical panel on right side, the acoustical panel of rear side, front sound-deadening louver, metab Frame, the bottom of the acoustical panel of rear side are provided with noise reduction inlet box, and the side of the close noise reduction inlet box of the acoustical panel at top is provided with Noise reduction goes out gas tank, and the top of the one end for the acoustical panel that noise reduction goes out at the top of gas tank pass-out is provided with rain-proof cover, rain-proof cover and noise reduction outlet Exhaust clearance is provided between one end of acoustical panel at the top of case pass-out, front sound-deadening louver includes shutter outer layer, noise-reduction Inner cord, the acoustical panel at top, the acoustical panel in left side, the acoustical panel on right side, the acoustical panel of rear side, the combination of front sound-deadening louver Formation can be located in metal bottom seat frame with the noise reduction shell of outside air convection, noise reduction outer shell base.This programme, which effectively reduces, makes an uproar Pollution of the sound to surrounding environment, noise reduction inlet box and noise reduction go out gas tank and have complemented each other to form special air flow passage, Ensure to ensure that noise does not leak by passing in and out gas tank while air normal convection, the ventilation for solving American Unit Substation shell Heat dissipation problem and noise leak problem.
The noise-reduction case of this programme is in order to further reduce vibrating noise caused by equipment operation, and external factor is to case Noise caused by body effect, is also improved.In order to prevent base will be because noise transmission caused by equipment operation is to housing, sheet Scheme is provided with noise reduction valve rubber between noise reduction shell and metal bottom seat frame, and noise reduction valve rubber prevents metal bottom seat frame by noise transmission To the noise reduction shell.In order to avoid in influence of the extreme weather conditions descending water to housing, acoustical panel of this programme at top Outside be pasted with weather-proof rubber layer, be pasted with weather-proof rubber layer in rain-proof cover top outer, weather-proof rubber layer eliminate it is outside because Noise caused by the top of element effect noise reduction shell.
As shown in figure 4, the structural representation of this programme acoustical panel.Acoustical panel includes flame-retardant gypsum board A, the suction overlapped successively Sound non-woven fabrics A, fire-retardant sound-absorbing orifice plate A, acoustical cotton layer, fire-retardant sound-absorbing orifice plate B, sound-absorbing non-woven fabrics B, flame-retardant gypsum board B, fire-retardant stone Cream plate A, sound-absorbing non-woven fabrics A, fire-retardant sound-absorbing orifice plate A, acoustical cotton layer, fire-retardant sound-absorbing orifice plate B, sound-absorbing non-woven fabrics B, flame-retardant gypsum board Closely pressing forms compound noise-reducing acoustical panel entirety to B.This programme can using bonding press by the way of, can also use bolt, The mode of stud perforation connection makes above layers combine closely.Above-mentioned composite silencing plate is applied on American Unit Substation housing, effectively Solve the problems, such as the noise-reduction of housing, while safeguard more convenient as a kind of overall composite layered board, handling.
In order to strengthen the overall structural strength of composite silencing plate so that plate core is unlikely to deform, and this programme is in composite plate Portion adds the keel structure of combination, as shown in figure 4, being provided with some regularly arranged I-shaped keel in acoustical cotton layer, inhales Sound cotton layer is embedded in the side grooves of I-shaped keel, has one by I-shaped section bar keel and being bonded for acoustical cotton Determine the plate core structure of non-deformability.Further, this programme it is above-mentioned it is improved on the basis of be also additionally arranged in the periphery of composite plate Metal coating panel, specifically acoustical panel also include stainless steel metal panel A, stainless steel metal panel B, stainless steel metal panel A is located at flame-retardant gypsum board A outside, and stainless steel metal panel B is located at flame-retardant gypsum board B outside, stainless steel metal panel A, It is flame-retardant gypsum board A, sound-absorbing non-woven fabrics A, fire-retardant sound-absorbing orifice plate A, acoustical cotton layer, fire-retardant sound-absorbing orifice plate B, sound-absorbing non-woven fabrics B, fire-retardant Closely pressing forms compound noise-reducing acoustical panel entirety, the stainless steel metal of this programme successively by plasterboard B, stainless steel metal panel B The thickness of panel is preferably 2mm.The introducing of I-shaped keel and stainless steel metal panel effectively enhances the overall knot of composite plate Structure intensity and the degree for being easy to assembling to use, improve the maintenance convenience of American Unit Substation housing.
Acoustical cotton is a kind of manmade inorganic fibre, and it is main typically to use the natural crystals such as quartz sand, lime stone, dolomite Raw material, coordinate the industrial chemicals such as some soda ash, borax to be melt into glass, under melting state, got rid of into by external force blowing produced cotton-shaped Fine fibre, wound mutually between fiber and fiber, crossings on different level, it is internally formed many tiny gaps, so as to realize sound-absorbing The function of noise reduction.The noise frequency range that the acoustical cotton of unlike material is adapted to absorb, which also has, to be stressed, and the acoustical cotton of this programme is low in absorption The noise of other frequency ranges can also be absorbed on the basis of frequency noise, specifically acoustical cotton layer includes the perforate ternary second overlapped successively Third rubber layer, polyurethane sponge layer, perforate layer of polyester fiber, perforate ethylene-propylene-diene monomer glue-line, polyurethane sponge layer, perforate polyester It is overall that fibrous layer close adhesion forms acoustical cotton layer.Perforate ethylene propylene diene rubber has good by its excellent viscoplasticity Air-borne sound sound insulation value, acoustic vibration caused by machine run can be eliminated, the resonance for effectively reducing low frequency noise is propagated.It is poly- Urethane sponge has excellent anti-acoustic capability, the assimilation effect to intermediate frequency noise it is further preferred that.Perforate polyester fiber board has good Medium-high frequency noise absorption performance, for eliminating high frequency noise.The combination of above three effectively enhances the anti-acoustic capability of acoustical cotton.
The fire-retardant sound-absorbing orifice plate of this programme also uses the design of Multifunctional layered, is formed and realized using different materials The layer of corresponding function, aperture is arranged to improve the performance of composite plate noise reduction on flaggy using the principle of aperture noise reduction.Specifically, Fire-retardant sound-absorbing orifice plate includes flame-retardant layer, the sound absorbing layer of close adhesion, and flame-retardant layer is provided with some regularly arranged tapered conical holes A, sound absorbing layer are provided with some regularly arranged tapered conical hole B, and tapered conical hole B average passage section area is more than tapered Bellmouth A average passage section area.Tapered duct helps to reduce the energy of sound wave, and the tapered duct of the expansion of two level Good effect is served for further noise reduction.The thickness of the fire-retardant sound-absorbing orifice plate of this programme is preferably 12mm.
The sound-absorbing non-woven fabrics of this programme also uses the design of multilayer, and noise reduction layer is provided between the non-woven fabrics of top layer, I.e. sound-absorbing non-woven fabrics includes nonwoven layer A, acoustical cotton layer A, aluminium foil layer, acoustical cotton layer B, the nonwoven layer B overlapped successively, nonwoven Layer of cloth A, acoustical cotton layer A, aluminium foil layer, acoustical cotton layer B, nonwoven layer B close adhesions form sound-absorbing non-woven fabrics entirety.Acoustical cotton energy It is enough effectively to absorb noise energy, aluminium foil layer can not only sound insulation, and being capable of reflection sound wave so that sound wave is after reflection by sound-absorbing Cotton absorbs, and improves the effect of noise reduction.
The flame-retardant gypsum board of this programme is combined the fire-retardant reinforced structure to be formed not only with the stainless steel metal panel of outer layer Good flame retardation effect, and overall structure is stable, therefore, the thickness of the flame-retardant gypsum board of this programme is preferably 12mm.
The American Unit Substation noise reduction shell of this programme goes out gas tank 2, left side acoustical panel 3, right side by noise reduction lamina tecti 1, noise reduction Acoustical panel 4, rear side acoustical panel 5, noise reduction inlet box 6, sound-deadening louver 7, metal end frame 8 are spliced, and form a casing.Disappear Sound inlet box 6 is located at the bottom of rear side acoustical panel 5 close to American Unit Substation fin bottom, and noise reduction goes out gas tank 2 and is located at noise reduction lamina tecti 1 Top, close to the side of noise reduction inlet box 6.Sound-deadening louver 7 includes left sound-deadening louver 7-1 and right sound-deadening louver 7-2, respectively It is connected with the right side acoustical panel 4 of left side acoustical panel 3 by hinge, and is connected by bearing pin with metal end frame 8.The American-type box of this programme The noise reduction lamina tecti of change noise reduction shell, noise reduction go out gas tank, left side acoustical panel, right side acoustical panel, rear side acoustical panel, noise reduction air inlet Case, sound-deadening louver use advanced compound noise-reducing acoustical panel.Compound noise-reducing acoustical panel by C-shape keel, low-frequency sound-absorbing cotton, Perforate fire-retardant abatvoix, sound-absorbing non-woven fabrics, flame-retardant gypsum board, metal decking composition.
Existing American Unit Substation noise reduction shell noise reduction unobvious, and can not solve to install American Unit Substation after noise reduction shell Heat dissipation problem.The advantages of this programme is not only to effectively reduce the noise that surrounding environment is delivered to during American Unit Substation operation, and Ensure the radiating of American Unit Substation, solve noise reduction ventilation for enclosures heat dissipation problem and noise leaks problem.This programme uses modularization Design, energy-conserving and environment-protective are repeatable to be utilized, and field fabrication technique is simple, quick for installation, also allows for the maintenance of American Unit Substation later stage.We Case by American Unit Substation run caused by noise transmission to effectively being cut down during surrounding environment.Noise reduction inlet box is located at Rear side acoustical panel bottom, below American Unit Substation fin, noise reduction goes out gas tank and is located at by noise reduction lamina tecti top, close to noise reduction Inlet box side, heat caused by American Unit Substation operation is shed by fin, and is gone out by noise reduction inlet box and noise reduction between gas tank Cross-ventilation the heat that American Unit Substation fin sheds is taken out of outside noise reduction shell, ensure the normal operation of American Unit Substation.
The sound-deadening louver of this programme is made up of one layer of shutter and one layer of noise-reduction plate, while noise reduction, is ensured Normal cross-ventilation, and can effectively prevent toy from entering in American Unit Substation.To prevent American Unit Substation from being made an uproar caused by running Sound is delivered to noise reduction shell by base, and one layer of noise reduction valve rubber is added between base and noise reduction shell.Rainwater during to prevent from raining Drop in top and produce noise effect to resident, paste one layer of weather-proof rubber slab in noise reduction cover top portion.
The American Unit Substation noise reduction shell of this programme is characterized by:By by C-shape keel, low-frequency sound-absorbing cotton, perforation Fire-retardant abatvoix, sound-absorbing non-woven fabrics, flame-retardant gypsum board, compound noise-reducing acoustical panel made of metal decking form a casing, Effectively noise is cut out during noise transmission, reduces pollution of the noise to surrounding environment.Noise reduction inlet box and noise reduction go out Gas tank devises special air flow passage, ensures the normal convection current of air, and ensures that noise does not leak by passing in and out gas tank, Solve the problems, such as that American Unit Substation is leaked problem with the ventilation and heat and noise of noise reduction shell.Based on above feature, U.S. of this programme The change of formula case is with prominent substantive distinguishing features and significantly progressive compared to existing product with noise-reduction case.
The American Unit Substation of this programme is not limited to the content disclosed in embodiment with noise-reduction case, goes out in embodiment Existing technical scheme can also be included mutually with individualism, and those skilled in the art are according to this programme combination common knowledge The simple alternative made falls within the scope of this programme.

Claims (7)

  1. A kind of 1. American Unit Substation noise-reduction case, it is characterized in that the noise reduction of the acoustical panel, right side of acoustical panel, left side including top Plate, the acoustical panel of rear side, front sound-deadening louver, metal bottom seat frame, the bottom of the acoustical panel of the rear side are provided with noise reduction air inlet Case, the side of the close noise reduction inlet box of the acoustical panel at the top go out gas tank provided with noise reduction, and the noise reduction goes out gas tank The top of one end of the acoustical panel at top described in pass-out is provided with rain-proof cover, and the rain-proof cover goes out described in gas tank pass-out with the noise reduction Exhaust clearance is provided between one end of the acoustical panel at top, the front sound-deadening louver includes shutter outer layer, noise-reduction plate Internal layer, the acoustical panel at the top, the acoustical panel in left side, the acoustical panel on right side, the acoustical panel of rear side, front sound-deadening louver group Close and formed and can be located at the noise reduction shell of outside air convection, the noise reduction outer shell base in the metal bottom seat frame,
    The acoustical panel include overlap successively flame-retardant gypsum board A, sound-absorbing non-woven fabrics A, fire-retardant sound-absorbing orifice plate A, acoustical cotton layer, resistance Burn and suck grill B, sound-absorbing non-woven fabrics B, flame-retardant gypsum board B, the flame-retardant gypsum board A, sound-absorbing non-woven fabrics A, fire-retardant sound-absorbing orifice plate A, it is whole to form compound noise-reducing acoustical panel for the close pressing of acoustical cotton layer, fire-retardant sound-absorbing orifice plate B, sound-absorbing non-woven fabrics B, flame-retardant gypsum board B Body,
    The acoustical cotton layer includes the perforate ethylene-propylene-diene monomer glue-line, polyurethane sponge layer, perforate layer of polyester fiber overlapped successively, The perforate ethylene-propylene-diene monomer glue-line, polyurethane sponge layer, perforate layer of polyester fiber close adhesion form acoustical cotton layer entirety.
  2. 2. American Unit Substation noise-reduction case according to claim 1, it is characterised in that the noise reduction shell and the metal Noise reduction valve rubber is provided between base frames, the noise reduction valve rubber prevents the metal bottom seat frame by noise transmission to outside the noise reduction Shell.
  3. 3. American Unit Substation noise-reduction case according to claim 1, it is characterised in that the outside of the acoustical panel at the top Be pasted with weather-proof rubber layer, the rain-proof cover top outer is pasted with weather-proof rubber layer, the weather-proof rubber layer eliminate it is outside because Element acts on noise caused by the top of the noise reduction shell.
  4. 4. American Unit Substation noise-reduction case according to claim 1, it is characterised in that be provided with the acoustical cotton layer some Regularly arranged I-shaped keel, it is whole that the acoustical cotton layer is embedded in formation acoustical cotton layer in the side grooves of the I-shaped keel Body.
  5. 5. American Unit Substation noise-reduction case according to claim 4, it is characterised in that the acoustical panel also includes stainless steel Metal decking A, stainless steel metal panel B, the stainless steel metal panel A are located at the outside of the flame-retardant gypsum board A, it is described not Rust steel metal panel B is located at the outside of the flame-retardant gypsum board B, the stainless steel metal panel A, flame-retardant gypsum board A, sound-absorbing without Spin cloth A, fire-retardant sound-absorbing orifice plate A, acoustical cotton layer, fire-retardant sound-absorbing orifice plate B, sound-absorbing non-woven fabrics B, flame-retardant gypsum board B, stainless steel metal Closely pressing forms compound noise-reducing acoustical panel entirety to panel B successively.
  6. 6. American Unit Substation noise-reduction case according to claim 1, it is characterised in that the fire-retardant sound-absorbing orifice plate includes tight Flame-retardant layer, the sound absorbing layer of close bonding, the flame-retardant layer are provided with some regularly arranged tapered conical hole A, on the sound absorbing layer Provided with some regularly arranged tapered conical hole B, the average passage section area of the tapered conical hole B is more than the tapered cone Shape hole A average passage section area.
  7. 7. American Unit Substation noise-reduction case according to claim 1, it is characterised in that the sound-absorbing non-woven fabrics is included successively The nonwoven layer A of overlapping, acoustical cotton layer A, aluminium foil layer, acoustical cotton layer B, nonwoven layer B, the nonwoven layer A, acoustical cotton layer A, Aluminium foil layer, acoustical cotton layer B, nonwoven layer B close adhesions form sound-absorbing non-woven fabrics entirety.
CN201610850532.3A 2016-09-26 2016-09-26 A kind of American Unit Substation noise-reduction case Active CN106653286B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112296420A (en) * 2019-07-29 2021-02-02 天津市升发科技股份有限公司 Online continuous cutting thin-wall aluminum pipe cutter
CN112393298B (en) * 2020-11-25 2023-05-26 宜兴市泰宇汽车零部件有限公司 Frame type range hood sound absorbing box based on modified composite sound absorbing cotton
CN113089862A (en) * 2020-12-31 2021-07-09 广州市五羊艺冠声学材料有限公司 Fireproof aluminum fiber sound absorber

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CN201222394Y (en) * 2008-06-30 2009-04-15 广州广高高压电器有限公司 Denoise case for dry transformer
CN202299525U (en) * 2011-10-28 2012-07-04 东莞市伟创东洋自动化设备有限公司 On-line test mute room for TV (television)
CN104269255A (en) * 2014-10-21 2015-01-07 国网浙江慈溪市供电公司 Noise insulation house
CN204946643U (en) * 2015-08-28 2016-01-06 宜兴市熊仕环保科技有限公司 A kind of denoising device for transformer

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Publication number Priority date Publication date Assignee Title
JPH08130128A (en) * 1994-10-31 1996-05-21 Fujikura Ltd Transformer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201222394Y (en) * 2008-06-30 2009-04-15 广州广高高压电器有限公司 Denoise case for dry transformer
CN202299525U (en) * 2011-10-28 2012-07-04 东莞市伟创东洋自动化设备有限公司 On-line test mute room for TV (television)
CN104269255A (en) * 2014-10-21 2015-01-07 国网浙江慈溪市供电公司 Noise insulation house
CN204946643U (en) * 2015-08-28 2016-01-06 宜兴市熊仕环保科技有限公司 A kind of denoising device for transformer

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