CN207728052U - A kind of ventilating noise reduction channel for indoor substation - Google Patents
A kind of ventilating noise reduction channel for indoor substation Download PDFInfo
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- CN207728052U CN207728052U CN201721009138.3U CN201721009138U CN207728052U CN 207728052 U CN207728052 U CN 207728052U CN 201721009138 U CN201721009138 U CN 201721009138U CN 207728052 U CN207728052 U CN 207728052U
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- ventilation mouth
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Abstract
The utility model discloses a kind of ventilating noise reduction channels for indoor substation, including channel, the channel is equipped with room ventilation mouth and outdoor ventilation mouth, noise reduction system is equipped in the channel, the noise reduction system includes referring to microphone, secondary sound source, error microphone and controller, described to be connect with controller with reference to microphone, secondary sound source, error microphone.The utility model has the advantage of：It eliminates its generated noise in ventilation process while meeting ventilation quantity needed for transformer, and there is larger frequency bandwidth, larger oise insulation factor can effectively eliminate transformer low frequency line spectrum noise；And single channel independence, it is easily installed, dismantles, replaces, repairs and maintains, it is highly practical.Channel disposed at air vent is designed with automatic back-fire relief baffle, can effectively prevent the fire spreading of fire incident, high safety.
Description
Technical field
The utility model is related to professional noise abatement technical fields, and in particular to a kind of ventilation for indoor substation disappears
Sound channel.
Background technology
With the quickening of Urbanization in China and being gradually increased for living standards of the people, many Yuan Jian substations in recent years
Periphery has created residential block, and newly-built substation also much has to the addressing location more in residential block.Therefore, substation's noise
Problem more causes the concern of people.Noise in substation mostlys come from the noise based on low frequency of transformer generation,
Its penetration power is strong, and propagation distance is remote, and extreme influence, a large amount of throwings of many substations by nearby residents are generated to surrounding enviroment
It tells, therefore it is very urgent to administer substation's noise problem.
Transformer substation in city is built as indoor substation, while transformer is in the process of operation more in order to reduce its factory outside noise
In will produce a large amount of heat, explosion can be caused if shedding will cause the shutdown severe patient of transformer not in time, then indoor change
Power station needs to be provided with ventilation and heat mouth to realize that heat is taken away in the ventilation by forced draft of room air.But thermovent is made while ventilation
For the predominating path that noise is propagated outward, great difficulty is brought to the improvement of substation's noise problem.Therefore it solves indoor
The ventilating noise reduction channel of contradiction between substation's ventilation heat exchange and noise abatement, design production indoor substation has important meaning
Justice.
Current existing ventilation denoising structure is mainly the following：The first, being must not to effectively eliminate low-frequency noise
The noise elimination structure for being added significantly to thickness is not used, reduces drafting efficiency and in many projects due to by appearance, reality
Space limitation cannot achieve.Second, be to use ventilating noise-elimination blinds, but this structure is poor for low-frequency noise effect,
Simultaneously in order to enhance oise insulation factor, noise elimination blinds is often designed as labyrinth type, this makes ventilation quantity be affected again, whole ventilation effect
Fruit is poor, the third, is to eliminate noise using perforation resonance louvre blade, and this structure is relatively narrow for the absorption band of noise,
It is ineffective simultaneously.Therefore it is impossible to meet actual demands for the prior art.
Utility model content
The purpose of this utility model seeks to the deficiency for existing apparatus, provides a kind of ventilation for indoor substation
Silencers channel, the absorption band that efficiently solves existing ventilation noise reduction channel is relatively narrow, ventilation quantity is insufficient, it is low effectively to solve
The problems such as frequency line spectrum noise and ventilation heat exchange contradict.
To achieve the above object, a kind of ventilating noise reduction channel for indoor substation involved by the utility model, packet
Channel is included, the channel is equipped with room ventilation mouth and outdoor ventilation mouth, noise reduction system, the noise reduction system are equipped in the channel
System includes referring to microphone, secondary sound source, error microphone and controller, described transaudient with reference to microphone, secondary sound source, error
Device is connect with controller.
Further, described to be arranged at ventilation opening indoors with reference to microphone.
Further, portion in the channel is arranged in the secondary sound source.
Further, the error microphone is arranged at outdoor ventilation mouth.
Further, it is additionally provided with porous inner panel in the channel, acoustical cotton is equipped between the porous inner panel and vias inner walls.
As preference, back-fire relief baffle is additionally provided at the room ventilation mouth.
As preference, rodent-proof mesh is covered on the outdoor ventilation mouth.
As preference, the outer wall in the channel is galvanized steel plain sheet, and the porous inner panel is porous aluminium sheet, the acoustical cotton
For the glass sound-absorbing cotton wrapped up by glass-fiber-fabric.
As preference, the channel is rectangular tube, and the room ventilation mouth and outdoor ventilation mouth are rectangular.
As preference, a length of 450~460mm in the channel, width be 1270~1280mm, a height of 450~460mm,
The length of side of the porous inner panel is 390~410mm.
The utility model has the advantage of：It uses main passive untied simulated techniques, is meeting ventilation quantity needed for transformer
While, its generated noise is eliminated in ventilation process, have larger frequency bandwidth, larger oise insulation factor,
Transformer low frequency line spectrum noise can be effectively eliminated；And single channel independence, it is easily installed, dismantles, replaces, repairs and maintains, it is real
It is strong with property.Channel disposed at air vent is designed with automatic back-fire relief baffle, can effectively prevent the fire spreading of fire incident, high safety.
Its global design aesthetics is strong, has the adaptability to match with ambient enviroment.The utility model is equally applicable to any need
Environment and the place of noise abatement are carried out while ventilation heat exchange.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of utility model device；
Fig. 2 is the apparatus structure schematic diagram of noise reduction system in another embodiment.
In figure：Channel 1, room ventilation mouth 2, outdoor ventilation mouth 3, with reference to microphone 4, controller 5, error microphone 6, secondary
Grade sound source 7, porous inner panel 8, back-fire relief baffle 9, rodent-proof mesh 10.
Specific implementation mode
The utility model is described in further detail in the following with reference to the drawings and specific embodiments：
A kind of ventilating noise reduction channel for indoor substation as shown in Fig. 1~2, including channel 1, on the channel 1
Equipped with room ventilation mouth 2 and outdoor ventilation mouth 3, noise reduction system is equipped in the channel 1, the noise reduction system includes with reference to transaudient
Device 4, controller 5, error microphone 6 and secondary sound source 7, it is described with reference to microphone 4, secondary sound source 7, error microphone 6 with
Controller 5 connects.It is described to be arranged at ventilation opening 2 indoors with reference to microphone 4.Portion in the channel 1 is arranged in the secondary sound source 7.
The error microphone 6 is arranged at outdoor ventilation mouth 3.Be additionally provided with porous inner panel 8 in the channel 1, the porous inner panel 8 with
Acoustical cotton is equipped between 1 inner wall of channel.It is additionally provided with back-fire relief baffle 9 at the room ventilation mouth 2.
As preference, rodent-proof mesh 10 is covered on the outdoor ventilation mouth 3.
The outer wall in the channel 1 is galvanized steel plain sheet, and the porous inner panel 8 is porous aluminium sheet, and the acoustical cotton is by glass
The glass sound-absorbing cotton of cloth package.The channel 1 is rectangular tube, and the room ventilation mouth 2 and outdoor ventilation mouth 3 are rectangular.
In the present embodiment, a length of 456mm in the channel 1, width 1279mm, a height of 456mm, the porous inner panel 8
The length of side be 400mm.
The utility model is in actual use：
A kind of ventilating noise reduction channel for indoor substation that the utility model embodiment provides, the size in channel 1
(long * wide * high) is 456mm*1279mm*456mm, and the 1 inner section length of side of channel is 400mm, and the architecture of 1 cavity wall of channel is light
Steel joist, the porous inner panel 8 on the inside of cavity wall are porous aluminium sheet, are galvanized steel plain sheet, internal filling glass acoustical cotton on the outside of cavity wall.Its
In porous aluminium plate thickness be 1mm, aperture 2mm, punching rate 25%, glass sound-absorbing cotton unit weight is 48Kg/m3, and thickness is
50mm is wrapped up by glass-fiber-fabric.Galvanized steel plain sheet plate thickness is 2mm.Channel 1 intracavity section product size is 40cm × 40cm, to reduce
Windage uses arc transition at 1 inner corner of channel.1 outside setting outdoor ventilation mouth 3 of channel, 1 inside setting of channel are indoor
Ventilation opening 2, size are 40cm × 40cm.The nearly indoor one side in ventilating noise reduction channel is equipped with opening handle, installation and repair master
When autocontrol system, by this side opening.
Active control system is damaged to prevent such as mouse animal from climbing into inside channel 1, is filled at outdoor ventilation mouth 3
There is rodent-proof mesh 10.Meanwhile 2 top of room ventilation mouth is equipped with back-fire relief baffle 9 comprising can cover whole baffle, the cigarette of ventilation hole
Mist inductor, automatic control switch device, when fire incident occurs in transformer room, a large amount of smog can trigger smoke inductor
The signal of alarm, release passes to automatic control switch device, and derailing switch is closed, then whole baffle covers room ventilation hole, prevents
Only the intensity of a fire is stretched outward from ventilation hole.
Since transformer noise is mainly using 100Hz octaves as the low frequency spectrum lines noise of fundamental frequency, it is easy to out of channel 1
It leaks and then influences nearby residents environment.In order to eliminate low-frequency noise in channel, a set of active noise reduction of installation in channel 1
System, the active noise reduction system include controller 5, with reference to microphone 4, secondary sound source 7, error microphone 6.Wherein, it controls
Device 5 and secondary sound source 7 are individually placed in dust shield case, and windproof and dustproof set is respectively arranged with outside with reference to microphone 4 and error microphone 6.
Active noise reduction system is installed on channel one side according to specific order arrangement component：It is divulging information with reference to the setting of microphone 4
2 side of room ventilation mouth is faced in silencers channel 1, error microphone 6 is arranged in ventilating noise reduction channel 1 close to outdoor ventilation mouth
3 sides, controller 5 and secondary sound source 7 are arranged between reference microphone 4 and error microphone 6, wherein secondary sound source 7 and ginseng
The distance for examining microphone 4 is 0.4m, and controller 5 is separately connected with reference to microphone 4, error microphone 6 and secondary sound source 7.
The concrete operating principle of active noise reduction system is：Transformer noise is outside from ventilating noise reduction channel 1 when system operation
Radiation, by noise signal transmission to controller 5 after being acquired with reference to microphone 4, controller 5 calculates secondary according to adaptive algorithm
Grade acoustic signals generate anti-noise sound field after power amplifier drives after acoustic signals output by secondary sound source 7, and error is transaudient
Device 6 receives noise sound field and the acoustic pressure of secondary sound field simultaneously, forms error signal after the two superposition, error signal is input to control
In device 5, adaptive algorithm adjusts the weight coefficient of controller 5 to change secondary signal intensity according to preset control targe
(including amplitude, frequency and phase) makes noise sound wave and secondary sound wave destructive interference, this process is continual to be carried out down
It goes, until system tends towards stability state, final eliminating transformer low-frequency noise.Meanwhile the active noise reduction system can be arranged and make an uproar
Sound threshold value realizes adaptive open and close according to transformer noise situation.
The cutoff frequency of 1 corresponding active control system of ventilating noise reduction channel described in the utility model embodiment is
425Hz uses active noise reduction system that can reduce the transformer low frequency noise of 425Hz or less frequency ranges.For transformer noise
Line spectrum 100Hz, 200Hz, 300Hz, 400Hz can be reduced to environmental background noise grade.Meanwhile ventilating noise reduction leads to the quilt of 1 cavity wall
Dynamic to inhale sound insulation control be more than 30dB (A) for high-frequency noises sound deadening capacity more than 500Hz octaves, therefore the ventilating noise reduction
Channel 1 (containing active control system) is more than 30dB (A) to the sound deadening capacity of transformer noise.
Finally it is pointed out that above example is only the more representational example of the utility model.Obviously, this practicality is new
Type is not limited to the above embodiments, and acceptable there are many deformations.All foundation the technical essence of the utility model are to above example institute
Any simple modifications, equivalents, and modifications done are considered as belonging to the scope of protection of the utility model.
Claims (8)
1. a kind of ventilating noise reduction channel for indoor substation, it is characterised in that：Including channel（1）, the channel（1）On set
There is indoor ventilation opening（2）With outdoor ventilation mouth（3）, the channel（1）Interior to be equipped with noise reduction system, the noise reduction system includes reference
Microphone（4）, secondary sound source（7）, error microphone（6）And controller（5）, described to refer to microphone（4）, secondary sound source（7）、
Error microphone（6）And controller（5）Connection；
The channel（1）Inside it is additionally provided with porous inner panel（8）, the porous inner panel（8）With channel（1）Acoustical cotton is equipped between inner wall；
The outdoor ventilation mouth（3）On be covered with rodent-proof mesh（10）.
2. a kind of ventilating noise reduction channel for indoor substation according to claim 1, it is characterised in that：The reference
Microphone（4）Ventilation opening indoors is set（2）Place.
3. a kind of ventilating noise reduction channel for indoor substation according to claim 2, it is characterised in that：The secondary
Sound source（7）It is arranged in channel（1）Middle part.
4. a kind of ventilating noise reduction channel for indoor substation according to claim 3, it is characterised in that：The error
Microphone（6）It is arranged in outdoor ventilation mouth（3）Place.
5. according to a kind of ventilating noise reduction channel for indoor substation described in any one of claim 1 ~ 4, feature exists
In：The room ventilation mouth（2）Place is additionally provided with back-fire relief baffle（9）.
6. a kind of ventilating noise reduction channel for indoor substation according to claim 5, it is characterised in that：The channel
（1）Outer wall be galvanized steel plain sheet, the porous inner panel（8）For porous aluminium sheet, the acoustical cotton is the glass wrapped up by glass-fiber-fabric
Acoustical cotton.
7. a kind of ventilating noise reduction channel for indoor substation according to claim 6, it is characterised in that：The channel
（1）For rectangular tube, the room ventilation mouth（2）With outdoor ventilation mouth（3）It is rectangular.
8. a kind of ventilating noise reduction channel for indoor substation according to claim 7, it is characterised in that：The channel
（1）A length of 450 ~ 460mm, width be 1270 ~ 1280mm, a height of 450 ~ 460mm, the porous inner panel（8）The length of side be 390 ~
410mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721009138.3U CN207728052U (en) | 2017-08-11 | 2017-08-11 | A kind of ventilating noise reduction channel for indoor substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721009138.3U CN207728052U (en) | 2017-08-11 | 2017-08-11 | A kind of ventilating noise reduction channel for indoor substation |
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| CN207728052U true CN207728052U (en) | 2018-08-14 |
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| CN201721009138.3U Active CN207728052U (en) | 2017-08-11 | 2017-08-11 | A kind of ventilating noise reduction channel for indoor substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636192A (en) * | 2020-12-10 | 2021-04-09 | 江西瑞斯科救援科技有限公司 | Fire protection method and device for electrical appliance |
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2017
- 2017-08-11 CN CN201721009138.3U patent/CN207728052U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636192A (en) * | 2020-12-10 | 2021-04-09 | 江西瑞斯科救援科技有限公司 | Fire protection method and device for electrical appliance |
| CN112636192B (en) * | 2020-12-10 | 2022-11-18 | 江西瑞斯科救援科技有限公司 | Fire protection method and device for electric appliance |
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