CN102022013A - Noise reduction structure of main noise resources of urban indoor substation - Google Patents
Noise reduction structure of main noise resources of urban indoor substation Download PDFInfo
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Abstract
The invention relates to a noise reduction structure of main noise resources of an urban indoor substation, belonging to the technical field of noise pollution control in environmental engineering. The noise reduction structure is mainly used for reducing the noise resources of the urban indoor substation, including noise radiated by a main transformer and a reactor 1. The noise reduction structure comprises a wall perforated plate resonance sound absorption structure 2, a sound isolation door 3, a ventilating shutter 4, a low-noise axial flow fan 5, an air intake silencer 6 and an air exhaust silencer 7, wherein the wall perforated plate resonance absorption structure 2 is located inside the wall and comprises a perforated gypsum plate and acrylic cotton; the sound isolation door 3 is filled with glass coated intermediate glass cotton fiber, and the gap of a door frame is filled with sealing strips; the ventilating shutter 4 and the low-noise axial flow fan 5 are used for ventilating and dissipating heat to ensure the safe and stable operation of the main transformer and the reactor; the air intake silencer 6 is installed on the outer part of the ventilating shutter 4, the upper part is a lighting sound-isolating window cover, and the lower part is an air flow channel covering the sound absorption material; and the air exhaust silencer 7 is installed outside a ventilating fan hole, and the interior is an air flow channel covering the sound absorption material.
Description
Technical field
The present invention relates to environmental engineering speciality noise pollution Prevention Technique field, especially a kind of at the indoor transformer station in city main noise source---the denoising structure of main transformer and reactor.
Background technology
Environmental problem is the global problem of human common concern, and noise pollution becomes one of environmental problem that 21 century primarily captures especially.Industrial noise, urban traffic noise and domestic noise have constituted three main sources of ambient noise.Industrial noise stands in the breach becomes maximum pollution from environmental noise, and transformer station's noise is one of main noise source in the industrial noise.Along with the develop rapidly of urban construction, indoor transformer station constantly increases, and transformer station enters into densely inhabited district inevitably, and simultaneously, some remote transformer stations are also just surrounded by newly-built residential district or development zone.Noise and ventilation fan that increases for the safe operation of transformer and cooling blower that transformer body and reactor operation produce make indoor transformer station noise become one of new important pollution source of noise in city.Transformer station 24h round the clock produces the medium and low frequency noise incessantly, and is very big to townsfolk's health hazard; Especially during summer high-temperature, bigger to the urban environmental impact.Therefore, controlling indoor transformer station noise is the important step that industrial noise is administered, and also is the dwelling environment of improving surrounding resident, makes great efforts to build socially harmonious necessary behave.
Pollution from environmental noise is made up of sound source, transaudient approach and three basic links of recipient.Carry out noise control from noise source and vibration source, it is positive, the most effective and reasonable measure, it also is one of striving direction of noise control in the industrial production, but it is big to administer technical difficulty, even need the technological improvement and the optimization of equipment, and will sharply rise to the noise reduction measure of noise source body its manufacturing cost of increase along with noise reduction, therefore generally all control at present, obtained in the engineering practice at home and abroad of noise elimination, sound absorption, sound insulation and vibration isolation technique using widely from the route of transmission.Yet transformer station is that a noise source is many, and it is wide to distribute, the ten minutes complicated dynamic system that noise repeatedly reflects, reflects, superposes.Should be with environmental science, systematic science and noise control acoustics are theoretical foundation, by to transformer station's machine room noise source and produce Noise Mechanism, acoustic characteristic, the network analysis of aspects such as propagation law, the further investigation noise control system, in conjunction with sound insulation, eliminate the noise, sound absorption and vibration isolation technique, and take into full account the characteristics of transformer station, guarantee the safe power supply of transformer station, the ventilation and heat of transformer and reactor and the requirement of maintenance, design a kind of complete at the indoor transformer station in city main noise source---the denoising structure of main transformer and reactor, thereby realize optimal control to the so large-scale noise source of industrial similar transformer station.
Transformer station's noise control at present only is confined to the local noise reduction control of door and window and body of wall, and indiscriminately imitates other noise control engineering scheme mostly, do not consider transformer station's own characteristic, thereby the noise control measure of the indoor transformer station in city is demanded improving urgently.
Summary of the invention
Technical problem: the present invention aims to provide the denoising structure in the indoor transformer station in a kind of city main noise source, address the above problem, make every effort to operation environment systematics method, by to transformer station's machine room noise source and the network analysis that produces aspects such as Noise Mechanism, acoustic characteristic, propagation law, the further investigation noise control system, in conjunction with sound insulation, noise elimination, sound absorption and vibration isolation technique, and take into full account the characteristics of transformer station, guarantee the ventilation and heat of safe power supply, transformer and reactor of transformer station and the requirement of maintenance.
Technical scheme: the present invention adopts following technical scheme to realize the purpose of inventing, and this denoising structure comprises:
Be positioned at the body of wall perforation board resonance sound absorption structure of body of wall inboard: constitute by perforation gypsum plank and acrylic staple fibre;
Be arranged in the fire prevention soundproof door of body of wall perforate: the sound absorption material that door is filled is a glass fabric bag middle rank microglass fiber, and fill with weather strip in the doorframe slit;
Be arranged in ventilation shutter, the low noise propeller fan of body of wall perforate: be used for ventilation and heat, guarantee the safe and stable operation of main transformer and reactor;
Be positioned at ventilating blind air intake sound absorber outside window: top is daylighting sound proof window cover, and the bottom is for covering the gas channel of sound absorption material;
Be positioned at the outer air draft sound absorber of low noise propeller fan: inner for covering the gas channel of sound absorption material.
The described body of wall perforation board resonance sound absorption structure inner surface that is positioned at the body of wall inboard is the perforation gypsum plank, and the empty 100mm in back is an acrylic staple fibre.
The sound absorption material of filling in the fire prevention sound insulation every is a glass fabric bag middle rank microglass fiber, and weather strip adopts the ethylene propylene diene rubber goods.
The air intake sound absorber is positioned at the ventilation shutter outside, and its top is daylighting sound proof window cover, and the bottom is the resistive chip air intake of a L type sound absorber, a plurality of gas channels are established in inside, all cover sound absorption material on each gas channel, sound absorption material adopts the thick super glass wool of 20mm, and the lined elbow place adds flow deflector.
The air draft sound absorber is positioned at outside the low noise propeller fan, and a plurality of gas channels are established in inside, all covers sound absorption material on each gas channel, and sound absorption material adopts the thick super glass wool of 20mm, and the lined elbow place adds flow deflector.
Beneficial effect: the application is the denoising structure in the indoor transformer station in a kind of city main noise source of researching and developing out on the basis of above-mentioned technology, has realized the optimal control to the so large-scale noise source of transformer station.It has following outstanding advantage: (1) is because porous absorption material is poor to the sound absorbing capabilities of all-bottom sound, adopt perforation board resonance sound absorption structure to replace porous absorption material, utilize helmholtz resonance sound absorption principle noise reduction, improved the sound absorbing capabilities of body of wall, widened the sound sucting band of structure all-bottom sound; Porous material behind the perforated plate can further increase acoustic resistance, improves acoustically effective; But this perforation board resonance sound absorption structure noise reduction 20～25dB.(2) in the cavity of door leaf, fill soft sound absorption material, not only weakened the standing wave resonance in the chamber, and suppressed the vibration of panel, improved the sound insulation factor of door itself; On the other hand, the weather strip at crack between a door and its frame place has avoided noise to escape from crack between a door and its frame; The soundproof door sound insulation factor that adopts is 28～30dB.(3) sound absorber of inlet and outlet neither influences the ventilation and heat of main transformer and reactor, can subdue the noise of outside propagation again; The sound proof window cover on air intake sound absorber top also has the natural lighting effect concurrently.(4) sound absorber is designed to the L type, there are a plurality of gas channels inside, all covers sound absorption material on each gas channel, has increased the length and the passage section girth of sound absorber, and noise reduction is better; The noise reduction of sound absorber is 25～30dB.
Description of drawings
Fig. 1 always schemes for the denoising structure in the indoor transformer station in city of the present invention main noise source, and the main noise source is wherein arranged---main transformer or reactor 1, body of wall perforation board resonance sound absorption structure 2, fire prevention soundproof door 3, ventilation shutter 4, low noise propeller fan 5, air intake sound absorber 6, air draft sound absorber 7.
Fig. 2 is body of wall perforation board resonance sound absorption structure figure of the present invention, and sound absorption material acrylic staple fibre 2-1, perforation gypsum plank 2-2 are wherein arranged.
Fig. 3 is a fire prevention soundproof door structure chart of the present invention, and pre-buried expanded anchor bolt 3-1, glass fabric bag middle rank microglass fiber 3-2,1.5 thick galvanized steel plain sheet 3-3, M4 self-tapping screw 3-4, weather strip 3-5, anti-guncotton 3-6, fireproof strip 3-7, " the 1.0 thick galvanized steel plain sheets+thick galvanized steel plain sheet in GF PLASTIC LAMINATED+1.0 " three layer construction 3-8 are wherein arranged.
Fig. 4-1 is air intake sound absorber facade structures figure of the present invention, Fig. 4-2 is an air intake sound absorber 1-1 sectional structure chart of the present invention, and sound insulation light inlet window cover 6-1, ventilation shutter 6-2, gas channel 6-3,20 thick super glass wool 6-4, galvanized steel plain sheet 6-5, zinc-plated punched steel plate 6-6 are wherein arranged.
Fig. 5-1 is air draft sound absorber facade structures figure of the present invention, Fig. 5-2 is an air draft sound absorber 1-1 sectional structure chart of the present invention, and gas channel 7-1, silencer box sound insulation enclosure 7-2, galvanized steel plain sheet 7-3,20 thick super glass wool 7-4, zinc-plated punched steel plate 7-5 are wherein arranged.
The specific embodiment
The denoising structure in the indoor transformer station in city of the present invention main noise source, be used to reduce the indoor transformer station in city the main noise source---main transformer and reactor make the indoor transformer station in city noise meet national noise emission standard to extraradial noise.
This denoising structure comprises:
Be positioned at the body of wall perforation board resonance sound absorption structure 2 of body of wall inboard: constitute by perforation gypsum plank and acrylic staple fibre;
Be arranged in the fire prevention soundproof door 3 of body of wall perforate: the sound absorption material that door is filled is a glass fabric bag middle rank microglass fiber, and fill with weather strip in the doorframe slit;
Be arranged in ventilation shutter 4, the low noise propeller fan 5 of body of wall perforate: be used for ventilation and heat, guarantee the safe and stable operation of main transformer and reactor;
Be positioned at the air intake sound absorber 6 outside the ventilation shutter 4: top is daylighting sound proof window cover, and the bottom is for covering the gas channel of sound absorption material;
Be positioned at the air draft sound absorber 7 outside the low noise propeller fan 5: inner for covering the gas channel of sound absorption material.
With certain indoor transformer station in 220kV city is example, sets forth the specific embodiment of the present invention:
1, the 220kV main transformer of this indoor transformer station in city and 10kV shunt reactor all place machine room indoor, and perforation board resonance sound absorption structure 2 is laid on the machine room 240mm brick wall surface of plastering.The inner surface of this perforation board resonance sound absorption structure 2 constitutes many Helmholtz resonators in parallel for perforation gypsum plank 2-2, has improved the sound absorbing capabilities of body of wall to all-bottom sound, has widened the sound sucting band of structure.Empty 100mm is put acrylic staple fibre 2-1 behind the perforation gypsum plank 2-2, and its bulk density is 20kg/m
3,, improve acoustically effective with further increase acoustic resistance.This perforation board resonance sound absorption structure 2 can make the noise reduction of this indoor transformer station in city improve 24dB.
2, the fire prevention soundproof door 3 of this city 220kV of indoor transformer station main transformer and 10kV shunt reactor employing, the sound absorption material of filling in the cavity of its door leaf are glass fabric bag middle rank microglass fiber 3-2, and bulk density is 90kg/m
3, weakening the standing wave resonance in the chamber, and suppress the vibration of panel.The weather strip of crack between a door and its frame adopts ethylene propylene diene rubber goods 3-5.The sound insulation factor of this fire prevention soundproof door 3 is 30dB.In addition, this fire prevention soundproof door 3 also comprises following important component: pre-buried expanded anchor bolt 3-1,1.5 thick galvanized steel plain sheet 3-3, M4 self-tapping screw 3-4, anti-guncotton 3-6, fireproof strip 3-7, " the 1.0 thick galvanized steel plain sheets+thick galvanized steel plain sheet in GF PLASTIC LAMINATED+1.0 " three layer construction 3-8.
3,, outside the air intake shutter 6-2 of this indoor transformer station in city, design the air intake sound absorber 6 integrate air intake, daylighting, to insulate against sound is installed in order to control the outside radiated noise of machine room air intake shutter 6-2 effectively.Air-flow enters from air intake sound absorber 6 bottoms, by the resistive chip gas channel of a plurality of L types 6-3, enter sound absorption material 6-4 by zinc-plated punched steel plate 6-6, because viscosity and the interior rubbing action of sound absorption material 6-4, acoustic energy changes into heat energy and reduces, after ventilation shutter 6-2 enters machine room inside.Sound absorption material adopts the thick super glass wool 6-4 of 20mm, and its bulk density is 20kg/m
3The lined elbow place is furnished with flow deflector.Air intake sound absorber 6 tops are sound insulation light inlet window cover 6-1, and it also has the natural lighting effect concurrently in sound insulation.The galvanized steel plain sheet 6-5 that is close to machine room body of wall and sound insulation light inlet window cover 6-1 is not with holes.The noise reduction of the air intake sound absorber of this indoor transformer station in city is 28dB.
4, the 220kV main transformer of this indoor transformer station in city and 10kV shunt reactor have all been installed and have been met the low noise propeller fan 5 that ventilation requires.Air draft silencer box 7 is positioned at outside the ventilation auger, to guarantee to reach the enough noise eliminations and the effect of ventilation and heat.Gas channel 7-1 in the air draft silencer box sound insulation enclosure 7-2 adopts the L type equally, all covers sound absorption material on each gas channel 7-1, and sound absorption material adopts the thick super glass wool 7-4 of 20mm, and its bulk density is 20kg/m
3The lined elbow place adds flow deflector.Noise is expelled to air draft silencer box 7 by propeller fan 5 in the machine room, enter sound absorption material by the zinc-plated punched steel plate 7-5 in the L type gas channel 7-1, acoustic energy reduces owing to viscosity and interior rubbing action change into heat energy, after 7 outlets of air draft silencer box to enter machine room outdoor.The galvanized steel plain sheet 7-3 that is close to machine room body of wall and silencer box sound insulation enclosure 7-2 is not with holes.The noise reduction of the air draft sound absorber of this indoor transformer station in city is 29dB.
Claims (5)
1. the denoising structure in the indoor transformer station in a city main noise source is characterized in that this denoising structure comprises:
Be positioned at the body of wall perforation board resonance sound absorption structure (2) of body of wall inboard: constitute by perforation gypsum plank and acrylic staple fibre;
Be arranged in the fire prevention soundproof door (3) of body of wall perforate: the sound absorption material that door is filled is a glass fabric bag middle rank microglass fiber, and fill with weather strip in the doorframe slit;
Be arranged in ventilation shutter (4), the low noise propeller fan (5) of body of wall perforate: be used for ventilation and heat, guarantee the safe and stable operation of main transformer and reactor;
Be positioned at the outer air intake sound absorber (6) of ventilation shutter (4): top is daylighting sound proof window cover, and the bottom is for covering the gas channel of sound absorption material;
Be positioned at the outer air draft sound absorber (7) of low noise propeller fan (5): inner for covering the gas channel of sound absorption material.
2. the denoising structure in the indoor transformer station in city according to claim 1 main noise source is characterized in that described body of wall perforation board resonance sound absorption structure (2) inner surface that is positioned at the body of wall inboard is the perforation gypsum plank, and the empty 100mm in back is an acrylic staple fibre.
3. the denoising structure in the indoor transformer station in city according to claim 1 main noise source is characterized in that the sound absorption material of filling in the fire prevention sound insulation every (3) is a glass fabric bag middle rank microglass fiber, and weather strip adopts the ethylene propylene diene rubber goods.
4. the denoising structure in the indoor transformer station in city according to claim 1 main noise source, it is characterized in that air intake sound absorber (6) is positioned at ventilation shutter (4) outside, its top is daylighting sound proof window cover, the bottom is the resistive chip air intake of a L type sound absorber, a plurality of gas channels are established in inside, all cover sound absorption material on each gas channel, sound absorption material adopts the thick super glass wool of 20mm, and the lined elbow place adds flow deflector.
5. the denoising structure in the indoor transformer station in city according to claim 1 main noise source, it is characterized in that air draft sound absorber (7) is positioned at outside the low noise propeller fan (5), a plurality of gas channels are established in inside, on each gas channel, all cover sound absorption material, sound absorption material adopts the thick super glass wool of 20mm, and the lined elbow place adds flow deflector.
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| CN106836539A (en) * | 2017-01-23 | 2017-06-13 | 杭州交联电力设计股份有限公司 | Transformer station's noise reduction system |
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| CN107749344A (en) * | 2017-12-14 | 2018-03-02 | 国网河南省电力公司洛阳供电公司 | A kind of denoising device for being used for transformer in transformer substation in city |
| CN111767638A (en) * | 2020-05-22 | 2020-10-13 | 云南电网有限责任公司 | Outdoor transformer substation sound insulation cover modular design method |
| CN111697435A (en) * | 2020-06-27 | 2020-09-22 | 国网上海市电力公司 | Noise reduction structure of 500kV transformer substation |
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