CN203565150U - Sound-insulation and sound-absorption cover of mobile cover plate type for ball mill - Google Patents

Sound-insulation and sound-absorption cover of mobile cover plate type for ball mill Download PDF

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Publication number
CN203565150U
CN203565150U CN201320588967.7U CN201320588967U CN203565150U CN 203565150 U CN203565150 U CN 203565150U CN 201320588967 U CN201320588967 U CN 201320588967U CN 203565150 U CN203565150 U CN 203565150U
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CN
China
Prior art keywords
sound
cover
absorption
ball mill
resonant cavity
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Expired - Lifetime
Application number
CN201320588967.7U
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Chinese (zh)
Inventor
杨世俊
王友光
杨国祥
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Sichuan Jianyang Xiongyu Environmental Protection Equipment Co Ltd
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Sichuan Jianyang Xiongyu Environmental Protection Equipment Co Ltd
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Priority to CN201320588967.7U priority Critical patent/CN203565150U/en
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Publication of CN203565150U publication Critical patent/CN203565150U/en
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Abstract

The utility model discloses a sound-insulation and sound-absorption cover of a mobile cover plate type for a ball mill. The top of the cover plate adopts the structure of a mobile cover plate type. The cover plate is divided into a plurality of sections to horizontally and repeatedly move on the rail of the ball mill. The cover plate comprises an outer frame, wherein the outside of the frame is provided with a panel matched with the frame, the inside of the frame is provided with an inner panel with a concave-convex structure, and a sound-absorption fabric layer is arranged on the inner panel; resonant cavities with cavity structures are formed in the panel; a damping layer is arranged in one resonant cavity near the outside of the panel, a slit sound-elimination layer composed of a slit structure is arranged in the resonant cavity near the inside of the panel, and sound-absorption materials are filled between the slit sound-elimination structure and the inner panel. Reverberation noise and superposition noise basically do not exist in the sound-insulation and sound-absorption cover. The direct sound of a device is processed by the multiple-sound absorption of the sound-absorption structure of the cover. Only low-frequency noise in sound waves can reach the resonant cavity. The cover satisfies the demand for sound-insulation and noise-reduction quantity by that the porous and cellular damping layer absorbs the low-frequency noise and the sound-absorption structure of the resonant cavity constantly reflects and decays the sound waves.

Description

The board-like sound insulation noise absorption cover of ball mill removable cover
Technical field
The utility model relates to a kind of sound insulation noise absorption cover, relates in particular to a kind of board-like sound insulation noise absorption cover of removable cover that is applicable to ball mill, belongs to sound insulation noise absorption cover technical field.
Background technology
Existing sound shroud for ball mill is steel structure assembly structure, and the securing member between sheet frame is that bolt connects, and the seam between sheet frame is processed with sealing strip.Existing sound shroud for ball mill be take sound insulation and in main, cover, is not done sound absorption and process, and therefore in cover, reverberation noise and superimposed noise are very large, do not establish heat-exchange ventilating system in addition in existing acoustic hood, depend merely on the problem that cleaning shaft exhausting solves heat radiation, and radiating effect is not good.
The steel structure plate structure of existing sound shroud for ball mill comprises panel, framework and perforation wainscot; Panel adds brace rod in the above space of 1m * 1m; Framework packs sound-absorbing material into, and one deck is by sound absorption fabric mask, and in cover, perforation wainscot is plane form.Although this acoustic hood is simple in structure, but can only meet the less demanding equipment of oise insulation factor uses, once equipment uprises the requirement of oise insulation factor, such as manufacturing technique requirent ball mill is dry ball, ball mill equipment maintenance capacity is large, steel ball is reinforced frequent, and such ball mill requires highly to oise insulation factor, and existing acoustic hood just cannot meet its requirement.
Utility model content
The purpose of this utility model is: provide a kind of ball mill removable cover board-like sound insulation noise absorption cover, solve existing acoustic hood and can not meet the equipment that high oise insulation factor requires, and in acoustic hood, reverberation noise and superimposed noise are very big, the technical problem that radiating effect is not good, thus above-mentioned problems of the prior art can effectively be solved.
The purpose of this utility model is to realize by following technical proposals: the board-like sound insulation noise absorption cover of a kind of ball mill removable cover, cover plate top is the board-like structure of removable cover, cover plate mark section horizontal reciprocating on ball mill track moves, cover plate comprises external frame, in the outside of framework, be provided with supporting with it panel, in the inner side of framework, be provided with the wainscot of concaveconvex structure, wainscot is provided with sound absorption precoat; Described panel is provided with the resonant cavity of cavity structure, near in the resonant cavity of panels outside, is being provided with damping layer, is provided with the slit silencing plate that narrow slit structure forms, filling sucting sound material between slit silencing plate and wainscot in the resonant cavity near panel inner side.
As optimal way, described damping layer is porous honeycomb or the oil binder damping layer that asphalt base-material is made.
As optimal way, described resonant cavity is for calculating the cavity body structure of the several different sizes that draw according to noise spectrum.
As further preferred embodiment, in resonant cavity, be provided with several dividing plates that play partition effect.
As optimal way, slit silencing plate is the grid of being located at above resonant cavity.
As optimal way, wainscot is that section configuration is trapezoidal perforation structure.
As optimal way, sound absorption precoat is the several layers of microcellular structure that sound absorption fabric is formed by stacking.
Compared with prior art, the beneficial effects of the utility model: process by the sound absorption of plate sound absorption structure in the board-like sound insulation noise absorption cover of the utility model ball mill removable cover, in cover substantially without reverberation noise and superimposed noise, the direct sound wave that only has equipment, its direct sound wave is processed by the polynary sound absorption of plate sound absorption structure, sound wave arrives resonant cavity sound absorption structure and only has low-frequency noise, by porous honeycomb damping layer, low-frequency noise sound absorption and resonant cavity sound absorption structure, to the continuous reflection loss of sound wave, are met to the sound insulation and noise reducing amount requirement of the noise absorption cover that insulates against sound.
Accompanying drawing explanation
Fig. 1 is the structural representation of the board-like sound insulation noise absorption cover of the utility model ball mill removable cover.
In figure: 1-external frame, 2-panel, 3-damping layer, 4-resonant cavity, 5-dividing plate, 6-slit silencing plate, 7-wainscot, the 8-precoat that absorbs sound, 9-sound-absorbing material.
The specific embodiment
Below in conjunction with specific embodiment, the utility model is further described.
Disclosed all features in this description, or the step in disclosed all methods or process, except the speciality and/or step of mutual repulsion, all can combine by any way, unless narration especially, all can be replaced by other equivalences or the alternative features with similar object,, unless narration especially, an embodiment in a series of equivalences of each feature or similar characteristics.
As shown in Figure 1, the cover plate top of the board-like sound insulation noise absorption cover of the utility model ball mill removable cover is the board-like structure of removable cover, and mark section horizontal reciprocating on ball mill track moves, and movable cover plate slit source sonication adopts sealing plate maze-type structure.Ball mill equipment steel ball is reinforced, maintenance, the maintenance of interior lining panel replacing, transmission system and motor, all only needs operation to drive movable cover plate mechanism, can realize arbitrarily and opening or closing, and makes maintenance, maintenance, the driving lifting of whole equipment very convenient.Cover plate comprises external frame 1, in the outside of framework 1, is provided with supporting with it panel 2, is provided with the wainscot 7 of concaveconvex structure in the inner side of framework 1, and wainscot 7 is provided with sound absorption precoat 8; Described panel 2 is provided with the resonant cavity 4 of cavity structure, in the resonant cavity 4 near panel 2 outsides, be provided with damping layer 3, in the resonant cavity 4 near panel 2 inner sides, be provided with the slit silencing plate 6 that narrow slit structure forms, filling sucting sound material 9 between slit silencing plate 6 and wainscot 7.Sound-absorbing material need to be controlled unit weight: the general unit weight of super glass wool is at 20kg/m, and it has fine acoustically effective to high frequency; But centering, low-frequency noise acoustically effective are poor, so must adjust control to sound-absorbing material unit weight, after special processing, sound-absorbing material unit weight is controlled at 30~40 kg/m, and centering, low-frequency noise have fine acoustically effective.
Wherein: the porous honeycomb that described damping layer 3 is made for asphalt base-material.The thickness of asphalt base-material damping layer is 10~20mm, and damping layer is porous honeycomb, can effectively consume low frequency acoustic energy, and discharges with the form of heat energy; Pitch damping layer has good noise reduction to low-frequency noise.In addition, damping layer can also adopt oil binder damping layer, and its thickness is: 2~5mm, can effectively reduce the transmission of panel solid-borne noise, and there is good defening effect.
Described resonant cavity 4 is for calculating the cavity body structure of the several different sizes that draw according to noise spectrum; According to noise spectrum, calculate the resonant cavity of different size, resonant cavity full-size is no more than 500 * 500mm.
In resonant cavity 4, be provided with several dividing plates 5 that play partition effect, for a large resonant cavity is separated into several little cavitys, strengthen its acoustically effective.
Slit silencing plate 6 is for being located at resonant cavity 4 grid above.Above resonant cavity, establish grid and form slit noise elimination structure, to the processing of eliminating the noise of the highest single frequency spectrum sound wave of noise.
Wainscot 7 for section configuration be trapezoidal perforation structure.In 1 square metre, plane, its surface area can reach 1.9m, in limited space, increases to greatest extent perforation field and micropore sound absorption area, and concave-convex perforated wainscot punching rate is more than 25%.
The microcellular structure that sound absorption precoat 8 is formed by stacking for several layers of sound absorption fabric; By multilayer sound absorption fabric, superposeed, form microcellular structure, to covering interior reverberation noise, superimposed noise, through noise, have good absorption effect.
Sound insulation sound absorption principle of the present utility model is as follows:
In the utility model sound insulation noise absorption cover, by the sound absorption of plate sound absorption structure, process, in cover substantially without reverberation noise and superimposed noise, the direct sound wave that only has equipment, its direct sound wave is processed by the polynary sound absorption of plate sound absorption structure, sound wave arrives resonant cavity sound absorption structure and only has low-frequency noise, by porous honeycomb damping layer, to low-frequency noise sound absorption and resonant cavity sound absorption structure, to the continuous reflection loss of sound wave, just can meet the sound insulation and noise reducing amount requirement of the noise absorption cover that insulates against sound.
Carry out the comparison of sound insulation and noise reducing amount with existing sound insulationg board:
Existing sound shroud for ball mill is being surveyed apart from acoustic hood 1m place: post noise 90dB (A); The board-like sound insulation noise absorption cover 1m of vanadium slag ball mill removable cover place surveys post noise: < 82dB (A); (vanadium slag ball mill is the original noise of dry ball: 110dB (A)) the board-like sound insulation noise absorption cover 1m of ball mill fixed cap place surveys post noise: < 75dB (A) (iron essence titanium ore ball mill is the original noise 105dB of wet ball mill (A)).
Existing sound shroud for ball mill sound insulation and noise reducing amount is 20dB (A); The board-like acoustic hood sound insulation and noise reducing of vanadium slag ball mill removable cover amount is 28dB (A); The board-like sound insulation noise absorption cover of iron essence titanium ore ball mill fixed cap sound insulation and noise reducing amount is 30dB (A).
By relatively, the board-like sound insulation sound absorption of ball mill removable cover is covered with very large technical advantage, can effectively solve the contradiction that ball mill production operation, maintenance of equipment, environmental protection exist each other, has application value widely.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims (7)

1. the board-like sound insulation noise absorption cover of ball mill removable cover, it is characterized in that: cover plate top is the board-like structure of removable cover, cover plate be divided into several sections on ball mill track horizontal reciprocating move, cover plate comprises external frame (1), in the outside of framework (1), be provided with supporting with it panel (2), in the inner side of framework (1), be provided with the wainscot (7) of concaveconvex structure, wainscot (7) is provided with sound absorption precoat (8); Described panel (2) is provided with the resonant cavity (4) of cavity structure, in the resonant cavity (4) near panel (2) outside, be provided with damping layer (3), in the resonant cavity (4) near panel (2) inner side, be provided with the slit silencing plate (6) that narrow slit structure forms, filling sucting sound material (9) between slit silencing plate (6) and wainscot (7).
2. the board-like sound insulation noise absorption cover of ball mill removable cover as claimed in claim 1, is characterized in that: porous honeycomb or oil binder damping layer that described damping layer (3) is made for asphalt base-material.
3. the board-like sound insulation noise absorption cover of ball mill removable cover as claimed in claim 1, is characterized in that: described resonant cavity (4) is for calculating the cavity body structure of the several different sizes that draw according to noise spectrum.
4. the board-like sound insulation noise absorption cover of ball mill removable cover as claimed in claim 3, is characterized in that: in resonant cavity (4), be provided with several dividing plates (5) that play partition effect.
5. the board-like sound insulation noise absorption cover of ball mill removable cover as claimed in claim 1, is characterized in that: slit silencing plate (6) is for being located at resonant cavity (4) grid above.
6. the board-like sound insulation noise absorption cover of ball mill removable cover as claimed in claim 1, is characterized in that: wainscot (7) for section configuration be trapezoidal perforation structure.
7. the board-like sound insulation noise absorption cover of ball mill removable cover as claimed in claim 1, is characterized in that: the microcellular structure that sound absorption precoat (8) is formed by stacking for several layers of sound absorption fabric.
CN201320588967.7U 2013-09-24 2013-09-24 Sound-insulation and sound-absorption cover of mobile cover plate type for ball mill Expired - Lifetime CN203565150U (en)

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CN201320588967.7U CN203565150U (en) 2013-09-24 2013-09-24 Sound-insulation and sound-absorption cover of mobile cover plate type for ball mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320588967.7U CN203565150U (en) 2013-09-24 2013-09-24 Sound-insulation and sound-absorption cover of mobile cover plate type for ball mill

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104801412A (en) * 2015-04-09 2015-07-29 侯如升 Noise-reduction cover plate for case of stainless steel coarse crusher
CN108962209A (en) * 2018-06-19 2018-12-07 广东美的白色家电技术创新中心有限公司 A kind of silencing apparatus and household electrical appliance
CN110081654A (en) * 2019-04-29 2019-08-02 东南大学 A kind of adaptive noise elimination cover board arrangement of air channel structure
CN111508460A (en) * 2020-03-26 2020-08-07 广州大学 Sound insulation energy-absorbing composite structure aiming at impact noise

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104801412A (en) * 2015-04-09 2015-07-29 侯如升 Noise-reduction cover plate for case of stainless steel coarse crusher
CN108962209A (en) * 2018-06-19 2018-12-07 广东美的白色家电技术创新中心有限公司 A kind of silencing apparatus and household electrical appliance
CN110081654A (en) * 2019-04-29 2019-08-02 东南大学 A kind of adaptive noise elimination cover board arrangement of air channel structure
CN110081654B (en) * 2019-04-29 2021-11-19 东南大学 Self-adaptive noise elimination cover plate device of air duct structure
CN111508460A (en) * 2020-03-26 2020-08-07 广州大学 Sound insulation energy-absorbing composite structure aiming at impact noise
CN111508460B (en) * 2020-03-26 2022-12-09 广州大学 Sound insulation energy-absorbing composite structure aiming at impact noise

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Granted publication date: 20140430