CN104001608A - Sound insulation device suitable for coal mill and method - Google Patents
Sound insulation device suitable for coal mill and method Download PDFInfo
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- CN104001608A CN104001608A CN201410209556.1A CN201410209556A CN104001608A CN 104001608 A CN104001608 A CN 104001608A CN 201410209556 A CN201410209556 A CN 201410209556A CN 104001608 A CN104001608 A CN 104001608A
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- coal mill
- glass wool
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Abstract
A sound insulation device suitable for a coal mill includes a steel structure sound insulation skeleton, a sound insulation cover is fixedly arranged on the steel structure sound insulation skeleton, a sound insulation board from which the sound insulation cover is prepared comprises a FC (fiber cement) board composite layer and an impedance composite sound absorbing material layer; the impedance composite sound absorbing material layer comprises a wavy perforated aluminum plate and a sound absorption non-woven cloth layer, the sound absorption non-woven layer is internally packaged and provided with a first superfine glass cotton layer; the FC (fiber cement) board composite layer is arranged on the inner side of the wavy perforated aluminum plate, the FC (fiber cement) board composite layer comprises two FC boards, a second superfine glass cotton layer is arranged between the two FC boards, and a light steel keel for fixing the second superfine glass cotton layer is arranged on the edge of the two FC boards. The invention also discloses a method for using the sound insulation device for sound insulation. The sound insulation device has the advantages of good sound insulation and sound absorption effects, light weight, convenient use and reasonable design.
Description
Technical field
The present invention relates to a kind of sound arrester that is applicable to coal mill, belong to noise treatment device technique field; The invention still further relates to a kind of sound insulating method that adopts aforementioned sound arrester.
Background technology
In existing machinery equipment running process, there is serious noise pollution, and the major technique of preventing and treating at present noise is by sound arrester and external environment condition isolation by plant equipment, sound arrester has become the important component of Noise Controlling in Comprehensive, thereby reduces noisiness, reaches the effect of sound insulation and noise reduction.Sound arrester of the prior art is of a great variety, but defening effect is on the whole unsatisfactory, cannot meet the environmental requirement of industrial enterprise.Particularly coal mill, is not also exclusively used in the sound arrester of coal mill in prior art.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of reasonable in design, simple in structure, easily manufactured, the sound arrester of what defening effect was good be applicable to coal mill.
Another technical problem to be solved by this invention is to provide a kind of sound insulating method that adopts aforementioned sound arrester.
Technical problem to be solved by this invention is to realize by following technical scheme, the present invention is a kind of sound arrester that is applicable to coal mill, be characterized in: this sound arrester comprises the sound insulation skeleton of steel construction, on steel construction sound insulation skeleton, be installed with acoustic hood; The sound insulationg board of making acoustic hood comprises FC plate composite layer and impedance complex sound-absorbing material layer; Described impedance complex sound-absorbing material layer comprises that undaform Pierced Aluminum Plank and acoustic absorption nonwoven fabrics layer form, and in acoustic absorption nonwoven fabrics layer, parcel is provided with the first super glass wool layer; Described FC plate composite layer is located at undaform Pierced Aluminum Plank inner side, FC plate composite layer comprises two blocks of FC plates, between two blocks of FC plates (fibre cement increased pressure board), be provided with the second super glass wool layer, be provided with the lightgage steel joist of fixing the second super glass wool layer at the edge of two blocks of FC plates; Be provided with soundproof door and sound insulation observation window near the acoustic hood place of coal mill falling sphere side, in described acoustic hood, be provided with lighting device, on the sound insulation panel at acoustic hood top, silencer is housed.
The sound arrester that is applicable to coal mill of the present invention, its further preferred technical scheme or technical characterictic are: the outer surface at impedance complex sound-absorbing material layer is also evenly coated with one deck damping material.Described damping material is selected from butyl, acrylate, poly-sulphur, butyronitrile and silicon rubber, polyurethane, polyvinyl chloride or epoxy resin.
The sound arrester that is applicable to coal mill of the present invention, its further preferred technical scheme or technical characterictic are: described the first super glass wool layer and the second super glass wool layer form by the super glass wool of inside and outside two-layer difference unit weight, and wherein the unit weight of internal layer super glass wool is 10kg/m
3-30 kg/m
3, the unit weight of outer field super glass wool is 40kg/m
3-60 kg/m
3.Most preferred scheme is: wherein the unit weight of internal layer super glass wool is 20 kg/m
3, the unit weight of outer field super glass wool is 50 kg/m
3.
The sound arrester that is applicable to coal mill of the present invention, its further preferred technical scheme or technical characterictic are: in two blocks of FC plates of FC plate composite layer, thickness in the FC in outside plate is made as 5-7mm, is made as 7-9mm in the thickness of the FC of inner side plate.
The invention also discloses a kind of sound insulating method that is applicable to coal mill, be characterized in, the sound arrester that is applicable to coal mill more than adopting described in any one technical scheme insulates against sound, coal mill two bearings inner side is constructed to one lands monoblock type sound arrester and makes acoustic hood, coal mill is carried out airtight at length direction, the noise of coal mill motor and transmission device thereof is no longer in treatment range; Make into, first set up square bar structural framework in the surrounding of coal mill, set up arch steel structure skeleton at the top of coal mill, then acoustic hood is arranged on the steel structure framework at coal mill surrounding and top, thereby form the acoustic hood of a sealing, be provided with soundproof door and sound insulation observation window near the sound insulation panel place of coal mill falling sphere side, in described acoustic hood, be provided with lighting device, on the sound insulation panel at acoustic hood top, silencer is housed, this silencer takes to embed mounting means; Finally, or according to user demand be coated with one deck damping material at the outer surface of acoustic hood.
The present invention is all contained in coal mill (except motor and transmission device thereof) etc. in square module dismountable all-closed acoustic hood, ensures overall blank rate <1%, forms comprehensive defening effect; In acoustic hood (square), the heating problem of coal mill adopts the mode of gravity-flow ventilation to solve, and is specially a silencer is installed directly over acoustic hood, and this silencer takes to embed mounting means, plays gravity-flow ventilation and dust discharge effect; In square acoustic hood, by falling sphere side, soundproof door and acoustic hood observation window are set, in blimp, have well-to-do space for maintenance, the maintenance while being beneficial to coal mill running; In blimp, have illuminator, convenient operation personnel patrol and examine; Sound arrester and coal mill body are rigidly connected without any, avoid overhead speaker transaudient; Acoustic hood adopts dismountable installation, reaches defening effect good simultaneously, does not affect normal work, convenient maintenance, small investment, and noise isolation amount reaches 15～20dB (A).
Sealing acoustic hood of the present invention adopts impedance complex sound-absorbing material layer and double-deck FC plate composite bed, has ensured sound insulation and acoustically effective well, and the super glass wool that is enclosed with different unit weights in cloth is spun in the sound absorption of impedance complex sound-absorbing material layer, has expanded sound absorption scope; The undaform Pierced Aluminum Plank of impedance complex sound-absorbing material layer plays noise refraction, entrant sound and sound absorption; Double-deck FC plate can play good sound insulation effect, and the second super glass wool layer further plays sound absorption, and lightgage steel joist can work effects such as stoping super glass wool is scattered, fixing glass cotton; By establishing damping layer, play the effect of damping sound-deadening.Compared with prior art, it is reasonable in design, easy to use, has ensured good acoustical insulation sound-deadening effect.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the sound insulationg board of sound arrester of the present invention;
Fig. 2 is coal mill noise processed effect spectrogram.
Detailed description of the invention
Referring to accompanying drawing, further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, with reference to Fig. 1, a kind of sound arrester that is applicable to coal mill, this sound arrester comprises the sound insulation skeleton of steel construction, on steel construction sound insulation skeleton, is installed with acoustic hood; The sound insulationg board of making acoustic hood comprises FC plate composite layer and impedance complex sound-absorbing material layer; Described impedance complex sound-absorbing material layer comprises that undaform Pierced Aluminum Plank 3 and acoustic absorption nonwoven fabrics layer 1 form, and are provided with the first super glass wool layer 2 at the interior parcel of acoustic absorption nonwoven fabrics layer 1; Described FC plate composite layer is located at undaform Pierced Aluminum Plank 3 inner sides, FC plate composite layer comprises two blocks of FC plates 4, between two blocks of FC plates 4, be provided with the second super glass wool layer 5, be provided with the lightgage steel joist 6 of fixing the second super glass wool layer 5 at the edge of two blocks of FC plates 4; Be provided with soundproof door and sound insulation observation window near the acoustic hood place of coal mill falling sphere side, in described acoustic hood, be provided with lighting device, on the sound insulation panel at acoustic hood top, silencer is housed.
Embodiment 2, in the sound arrester that is applicable to coal mill described in embodiment 1: the outer surface at impedance complex sound-absorbing material layer is also evenly coated with one deck damping material.
Embodiment 3, in the sound arrester that is applicable to coal mill described in embodiment 2: described damping material is selected from butyl, acrylate, poly-sulphur, butyronitrile and silicon rubber, polyurethane, polyvinyl chloride or epoxy resin.
Embodiment 4, in the sound arrester that is applicable to coal mill described in embodiment 1 or 2 or 3: described the first super glass wool layer and the second super glass wool layer form by the super glass wool of inside and outside two-layer difference unit weight, and wherein the unit weight of internal layer super glass wool is 10kg/m
3-30 kg/m
3, the unit weight of outer field super glass wool is 40kg/m
3-60 kg/m
3.
Embodiment 5, in the sound arrester that is applicable to coal mill described in embodiment 1 or 2 or 3: described the first super glass wool layer and the second super glass wool layer form by the super glass wool of inside and outside two-layer difference unit weight, and wherein the unit weight of internal layer super glass wool is 15kg/m
3-25 kg/m
3, the unit weight of outer field super glass wool is 45kg/m
3-55 kg/m
3.
Embodiment 6, a kind of sound arrester that is applicable to coal mill, this sound arrester comprises the sound insulation skeleton of steel construction, on steel construction sound insulation skeleton, is installed with acoustic hood; The sound insulationg board of making acoustic hood comprises FC plate composite layer and impedance complex sound-absorbing material layer; Described impedance complex sound-absorbing material layer comprises that undaform Pierced Aluminum Plank 3 and acoustic absorption nonwoven fabrics layer 1 form, and are provided with the first super glass wool layer 2 at the interior parcel of acoustic absorption nonwoven fabrics layer 1; Described FC plate composite layer is located at undaform Pierced Aluminum Plank 3 inner sides, FC plate composite layer comprises two blocks of FC plates 4, between two blocks of FC plates 4, be provided with the second super glass wool layer 5, be provided with the lightgage steel joist 6 of fixing the second super glass wool layer 5 at the edge of two blocks of FC plates 4; Be provided with soundproof door and sound insulation observation window near the acoustic hood place of coal mill falling sphere side, in described acoustic hood, be provided with lighting device, on the sound insulation panel at acoustic hood top, silencer is housed.
Outer surface at impedance complex sound-absorbing material layer is also evenly coated with one deck damping material.Described damping material is selected from butyl, acrylate, poly-sulphur, butyronitrile and silicon rubber, polyurethane, polyvinyl chloride or epoxy resin.
Described the first super glass wool layer and the second super glass wool layer form by the super glass wool of inside and outside two-layer difference unit weight, and wherein the unit weight of internal layer super glass wool is 20 kg/m
3, the unit weight of outer field super glass wool is 50 kg/m
3.
In two blocks of FC plates of FC plate composite layer, be made as 6mm in the thickness of the FC in outside plate, be made as 8mm in the thickness of the FC of inner side plate.
The sound insulating method that is applicable to coal mill is: adopt the above-mentioned sound arrester that is applicable to coal mill to insulate against sound, coal mill two bearings inner side is constructed to one lands monoblock type sound arrester and makes acoustic hood, coal mill is carried out airtight at length direction, the noise of coal mill motor and transmission device thereof is no longer in treatment range; Make into, first set up square bar structural framework in the surrounding of coal mill, set up arch steel structure skeleton at the top of coal mill, then acoustic hood is arranged on the steel structure framework at coal mill surrounding and top, thereby form the acoustic hood of a sealing, be provided with soundproof door and sound insulation observation window near the sound insulation panel place of coal mill falling sphere side, in described acoustic hood, be provided with lighting device, on the sound insulation panel at acoustic hood top, silencer is housed, this silencer takes to embed mounting means; Finally, the outer surface coating one deck damping material at acoustic hood according to user demand.
Inventor in certain steam power plant of Chinalco for DTM(MG) 320/470 type ball mill installs the sound arrester of the present embodiment additional.Noise reduction and evaluation are as follows:
Complete after the work such as making to coal mill acoustic hood, installation, debugging, this coal mill is installed to acoustic hood after noise test.Noise testing the results are shown in Table 1.
Table 1 DTM(MG) noise testing result after 320/470 moulded coal grinding machine installation module formula acoustic hood
Unit: frequency (HZ), sound pressure level (dB)
From test result, the each frequency range noise of coal mill all has obvious reduction, the each frequency range sound pressure level of each measuring point is all down to below 90dB, A weighted noise value reduces 18.7dB (A), reach 84.2dB (A), reach the noise reduction of prediction, well below 90dB (A) the safety work standard of national regulation, therefore coal mill sound arrester control noise effects of the present invention is remarkable.Coal mill noise processed effect spectrogram is with reference to Fig. 2, and as shown in Figure 2, the each frequency range noise of coal mill all declines obviously, and each frequency range noise figure is all down to below 90dB, and the frequency range noise range of decrease that is wherein greater than 250Hz is larger, and the maximum range of decrease, at 8000Hz point, is 15.9dB; The frequency range noise range of decrease that is less than 250Hz is less than normal, and the minimum range of decrease, at 31.5Hz point, is 5.8dB.
Checking by experiment, the present invention has obtained good effect in the control of real coal mill noise, improve preferably the noise pollution environment in workshop, improve staff's operating efficiency, advantageously safeguard work personnel's physical and mental health, also has to utilize and safeguards the equipment operation of boiler shop and eliminate the fine potential safety hazard existing.
Claims (7)
1. a sound arrester that is applicable to coal mill, is characterized in that: this sound arrester comprises the sound insulation skeleton of steel construction, on steel construction sound insulation skeleton, is installed with acoustic hood; The sound insulationg board of making acoustic hood comprises FC plate composite layer and impedance complex sound-absorbing material layer; Described impedance complex sound-absorbing material layer comprises that undaform Pierced Aluminum Plank and acoustic absorption nonwoven fabrics layer form, and in acoustic absorption nonwoven fabrics layer, parcel is provided with the first super glass wool layer; Described FC plate composite layer is located at undaform Pierced Aluminum Plank inner side, and FC plate composite layer comprises two blocks of FC plates, is provided with the second super glass wool layer between two blocks of FC plates, is provided with the lightgage steel joist of fixing the second super glass wool layer at the edge of two blocks of FC plates; Be provided with soundproof door and sound insulation observation window near the acoustic hood place of coal mill falling sphere side, in described acoustic hood, be provided with lighting device, on the sound insulation panel at acoustic hood top, silencer is housed.
2. the sound arrester that is applicable to coal mill according to claim 1, is characterized in that: the outer surface at impedance complex sound-absorbing material layer is also evenly coated with one deck damping material.
3. the sound arrester that is applicable to coal mill according to claim 2, is characterized in that: described damping material is selected from butyl, acrylate, poly-sulphur, butyronitrile and silicon rubber, polyurethane, polyvinyl chloride or epoxy resin.
4. according to the sound arrester that is applicable to coal mill described in claim 1 or 2 or 3, it is characterized in that: described the first super glass wool layer and the second super glass wool layer form by the super glass wool of inside and outside two-layer difference unit weight, and wherein the unit weight of internal layer super glass wool is 10kg/m
3-30 kg/m
3, the unit weight of outer field super glass wool is 40kg/m
3-60 kg/m
3.
5. according to the sound arrester that is applicable to coal mill described in claim 1 or 2 or 3, it is characterized in that: described the first super glass wool layer and the second super glass wool layer form by the super glass wool of inside and outside two-layer difference unit weight, and wherein the unit weight of internal layer super glass wool is 20 kg/m
3, the unit weight of outer field super glass wool is 50 kg/m
3.
6. according to the sound arrester that is applicable to coal mill described in claim 1 or 2 or 3, it is characterized in that: in two blocks of FC plates of FC plate composite layer, be made as 5-7mm in the thickness of the FC in outside plate, be made as 7-9mm in the thickness of the FC of inner side plate.
7. one kind is applicable to the sound insulating method of coal mill, it is characterized in that, adopt the claim 1-6 sound arrester that is applicable to coal mill described in any one to insulate against sound, coal mill two bearings inner side is constructed to one lands monoblock type sound arrester and makes acoustic hood, coal mill is carried out airtight at length direction, the noise of coal mill motor and transmission device thereof is no longer in treatment range; Make into, first set up square bar structural framework in the surrounding of coal mill, set up arch steel structure skeleton at the top of coal mill, then acoustic hood is arranged on the steel structure framework at coal mill surrounding and top, thereby form the acoustic hood of a sealing, be provided with soundproof door and sound insulation observation window near the sound insulation panel place of coal mill falling sphere side, in described acoustic hood, be provided with lighting device, on the sound insulation panel at acoustic hood top, silencer is housed, this silencer takes to embed mounting means; Finally, or according to user demand be coated with one deck damping material at the outer surface of acoustic hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209556.1A CN104001608A (en) | 2014-05-19 | 2014-05-19 | Sound insulation device suitable for coal mill and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209556.1A CN104001608A (en) | 2014-05-19 | 2014-05-19 | Sound insulation device suitable for coal mill and method |
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| CN104001608A true CN104001608A (en) | 2014-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104616649A (en) * | 2014-12-05 | 2015-05-13 | 城林环保技术（上海）有限公司 | PVC (Polyvinyl Chloride) corrosion-resistant sound-absorbing silencing plate |
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| CN103738037A (en) * | 2014-01-26 | 2014-04-23 | 上海交通大学 | Middle-low frequency sound insulation and heat insulation composite wall plate |
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2014
- 2014-05-19 CN CN201410209556.1A patent/CN104001608A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10219868A (en) * | 1997-02-12 | 1998-08-18 | Zeon Kasei Co Ltd | Sound insulation panel |
| CN200945451Y (en) * | 2006-09-10 | 2007-09-12 | 韩登才 | Eliminating noise-leakage structure for coal mill sound insulation cover column and sound insulating element |
| CN201126703Y (en) * | 2007-12-05 | 2008-10-01 | 杭州蓝保环境技术有限公司 | Suction noise barrier |
| US20110108359A1 (en) * | 2008-07-17 | 2011-05-12 | Toyota Jidosha Kabushiki Kaisha | Impact and sound absorbing material and sound absorbing structure |
| CN103738037A (en) * | 2014-01-26 | 2014-04-23 | 上海交通大学 | Middle-low frequency sound insulation and heat insulation composite wall plate |
Non-Patent Citations (1)
| Title |
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| 崔岩: "球磨机噪声控制理论分析与应用", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104616649A (en) * | 2014-12-05 | 2015-05-13 | 城林环保技术（上海）有限公司 | PVC (Polyvinyl Chloride) corrosion-resistant sound-absorbing silencing plate |
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Application publication date: 20140827 |
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