CN107795333A - A kind of colliery local ventilation system - Google Patents
A kind of colliery local ventilation system Download PDFInfo
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- CN107795333A CN107795333A CN201711285941.4A CN201711285941A CN107795333A CN 107795333 A CN107795333 A CN 107795333A CN 201711285941 A CN201711285941 A CN 201711285941A CN 107795333 A CN107795333 A CN 107795333A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 60
- 230000005611 electricity Effects 0.000 claims abstract description 49
- 239000003245 coal Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims description 18
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 6
- 210000003128 head Anatomy 0.000 description 7
- 238000005065 mining Methods 0.000 description 7
- 210000000158 ommatidium Anatomy 0.000 description 7
- 230000007306 turnover Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
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- 238000011105 stabilization Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a kind of colliery local ventilation system, the present invention is arranged in coal cutting roadway, the main air blower being connected including air duct, with main power source, the standby fan, the emergent local fan that are connected with stand-by power supply, emergent local fan are connected with battery and main power source respectively by converting system；Converting system and the control circuit of main switching control, the control circuit of standby controlling switch, battery, main power source connect.The present invention operation method be：Main switching control closes, main air blower operation and the air feed into main wind tube；Main power source is charged by converting system to battery；When main power source is stopped work without plan dead electricity main air blower, standby fan is to main wind tube air feed；When main power source, stand-by power supply are without plan dead electricity, emergent local fan obtains electric operation at battery and to main wind tube air feed.The present invention allows coalmine ventilation to possess reliability, redundancy, ensures in the case of main power source power-off even stand-by power supply power-off, still there is emergency ventilation function.
Description
Technical field
Present invention relates particularly to a kind of Link Between Mine Ventilation Safety Systems, especially coal mine roadway local ventilation system.
Background technology
According to statistics, the probability of gas explosion 80% that underground coal mine occurs is relevant with local ventilation.Pre- anti-gas explosion
Emphasis should be the driving face using local ventilation, because in gas accident caused by local ventilation problem, it is most of with it is local
Ventilation blower shuts down relevant.Therefore how research improves the reliability of local ventilation, reduces blowing-out number as far as possible, to prevention
Gas accident is significant.
With the development of mine machinery, electrical equipment especially high-power electric appliance equipment is more and more, and these are high-power
When power supply unit works together, the problem of caused harmonic component can cause low quality to be powered, this can be to detecting system and electromechanics
Protection system has an impact, and causes to malfunction, and causes to trip, so as to influence powered stable；In addition ground wind and rain thunder and lightning and failure
Tripping operation inevitably causes two fans, and dead electricity is stopped simultaneously, influences the reliability of local ventilation, threatens ventilating gas peace
Entirely.Therefore, further research improves local ventilation reliability, protect it from wind and rain thunder and lightning and avoid the shadow used by other equipment
Ring, still tool is of great significance；Pseudo- tiltedly flexible type shield coal-mining method production practice of especially bowing needs Construction of Inclined
Upward advanced ommatidium, once power failure blowing-out, influenceed by gas density is lighter-than-air, even if seldom gas emission is very
Methane accumulation is also resulted in the short blowing-out time in moraine head, causes gas exceeding limit, serious threat mine ventilation and operating personnel
Safety.
《Safety of Coal Mine Production standardizes basic demand and methods of marking (tentative)》Aeration portion provides：" no plan blowing-out 1
Secondary 10 points of button ", can at most detain 35 points；And《(tentative) the regulation mine safety life of Safety of Coal Mine Production standardization examination deciding grade and level method
Producing standardization must reach more than three-level, not stop producing immediately up to the mine of level.This means send three times and above without plan
Blowing-out mine must suspend operations for consolidation.This also embodies the attention of management of the China to local ventilation.The coal mining enterprise of falling Bi Zhe strengthens
Power supply and partial Ventilation Management, improve the reliability of local ventilation.
Therefore, under the safety management idea of " gas exceeding limit is exactly accident ", the requirement to local ventilation is very high, so must
Reliability, the redundancy of local ventilation power supply and booster must be improved.
However, in present mining technique, lack it is more excellent can significantly improve local ventilation reliability, redundancy it is logical
Wind technology, guarantee are reliably divulged information when needing local ventilation under any circumstance.
The content of the invention
The shortcomings that it is an object of the invention to overcome prior art, there is provided a kind of coal mine roadway local ventilation system, with solution
Aeration technology in certainly existing mining lacks the technical problem of more reliable property and redundancy.
To achieve the above object, the technical solution used in the present invention is：
The colliery local ventilation system of the present invention, is arranged in coal cutting roadway, including air duct and is connected to main wind tube air intake
The blower fan apparatus at end；Blower fan apparatus includes the main air blower to run well, for main air blower without the standby wind started after scheduled shutdown
Machine, when can not start without scheduled shutdown and standby fan for main air blower and the emergent local fan that starts.Main air blower and master
Air duct is connected, and main air door is set in junction, and standby fan, emergent local fan are connected to main wind by branch road air duct respectively
Cylinder.Branch road air duct is provided with air door with main wind tube junction.Described main air blower, standby fan, meet an urgent need local fan and power supply
System connects.Specially：
Described main air blower is connected with main power source, and main switching control is set on main power source.
Described standby fan is connected with stand-by power supply, and standby controlling switch is set on stand-by power supply.
Described main switching control and standby controlling switch chain control.
Described emergent local fan is connected by converting system with battery, and battery is connected by converting system and main power source
Connect.Described converting system is connected with main switching control, standby controlling switch, for chain control meet an urgent need local fan, battery,
Circuit opening and closing between main power source.
A kind of colliery local ventilation system as described above, illustrate further as converting system includes control loop, master
Electric power loop.
Described main power circuit is connected to main power source, is connected with surge protection circuit, transformation on main power circuit in turn
Device, reactor, rectifier, frequency converter, the emergent local fan of frequency converter connection are connected in the output end of rectifier.Rectifier it is defeated
Go out end and be connected to battery.Fire-fighting signal constant current source output unit is connected with the output end of rectifier.In the input of frequency converter
End is provided with main switch.
Described control loop includes the control power transformer from main power circuit power taking, controls the defeated of power transformer
Go out between positive pole and negative pole to be in series with the electromagnetic control coil, main air blower electrical interlocks switch, standby fan electricity of main switch respectively
Gas interlock switch, fire protection electric interlock switch, and form loop between the output cathode and negative pole of control power transformer.
Described main switching control and main air blower electrical interlocks switch chain control, standby controlling switch and standby fan electricity
Gas interlock switch chain control.Main switching control is normally opened, main air blower electrical interlocks switch is normally closed；Standby controlling switch is normally opened, standby
Switched with blower fan electrical interlocks normally closed；Main switch is normally opened.
A kind of colliery local ventilation system as described above, is illustrated further as described fire-fighting signal constant current source
Output unit includes the IGBT in rectifier output end, isolating transformer, fire-fighting signal power transformer, mutual inductance is linked in sequence
Device, fire-fighting signal loop.Probe, the fire protection electric interlock switch for monitoring fire fighting state are provided with fire-fighting signal loop
Electromagnetic control coil.
A kind of colliery local ventilation system as described above, illustrate further as described power input is exchange
660V is inputted.Transformer exports for 480V.Rectifier is 480V direct current outputs.Frequency converter is 380V exchange outputs.Control power supply
Transformer is 36V direct current outputs.Described IGBT is 240V exchange outputs.Isolating transformer is 220V exchange outputs.Fire-fighting is believed
Number power transformer is 24V direct current outputs.
A kind of colliery local ventilation system as described above, is illustrated further as described inverter input positive pole
It is provided with the first diode, the output end connection inverter input of the first diode.Inputted in the first diode and frequency converter
The first safety box is also set up between end.
A kind of colliery local ventilation system as described above, is illustrated further as described IGBT inputs are in positive pole
The first filter capacitor is provided between negative pole.IGBT inputs set the second safety box, the second diode in positive pole.Described
The second filter capacitor is set between the positive pole and negative pole of isolating transformer output end.
The input of described fire-fighting signal power transformer is connected with main power circuit, fire-fighting signal power transformer
Input end-coil carries centre cap, and centre cap is connected with isolating transformer.
A kind of colliery local ventilation system as described above, is illustrated further to be also set up in described control loop
There is test switch, described test switch is simultaneously connected in main air blower electrical interlocks switch, standby fan electrical interlocks switch.Specifically
For：Main air blower electrical interlocks switchs contacts with standby fan electrical interlocks switch, and wherein standby fan electrical interlocks switch is defeated
Go out the input that end is connected to main air blower electrical interlocks switch, the input of test switch is connected to standby fan electrical interlocks and opened
The input of pass, the output end of test switch are connected to the output end of main air blower electrical interlocks switch.
It is as follows the invention also discloses a kind of operation method of colliery local ventilation system：
(1), main switching control is closed, main air blower normal operation, and branch road air duct and the air door of main wind tube junction are closed, main
Blower fan air feed into main wind tube；Main power source is charged by converting system to battery；
(2), when main power source disconnects without plan dead electricity, main switching control, main air blower is stopped work, and standby controlling switch closure is standby
It is connected with blower fan with stand-by power supply, standby fan operating；The main air door of main air blower and main wind tube junction is closed, standby fan with
Air door at the branch road air duct of main wind tube connection is opened, and standby fan is to main wind tube air feed；
(3), when main power source without plan dead electricity, stand-by power supply without plan dead electricity, close main switch, meet an urgent need local fan from
Obtain electric operation at battery, the air door at the branch road air duct that standby fan is connected with main wind tube is closed, meet an urgent need local fan and main wind
Air door at the branch road air duct of cylinder connection is opened, and local fan of meeting an urgent need is to main wind tube air feed；
(4) local fan, is met an urgent need to during main wind tube air feed, and fire fighting state is abnormal, stops emergent local fan dead electricity
Only operate.
A kind of operation method of colliery local ventilation system as described above, it is that described main power source leads to that more one, which enters explanation,
Cross converting system is specially to battery charging：660V main power source is exchanged by obtaining stabilization after transformer, reactor, rectifier
Clean 480V dc sources, and directly charged to battery；
Described emergent local fan obtains electric operation at battery, is specially：Main switching control and standby controlling switch are lost
It is electrically disconnected, main air blower electrical interlocks switch is closed with standby fan electrical interlocks switch, control loop conducting, the control of main switch
Circuit processed obtains electric, and main switch closure, the AC power that the 480V dc sources of battery are converted to 380V by frequency converter is input to
Emergent local fan, make emergent local fan operating；
Described fire fighting state is abnormal, emergent local fan dead electricity is shut down, is specially：Emergent local fan is to master
During air duct air feed, probe is abnormal to monitoring fire fighting state, and fire-fighting signal loop disconnects, and fire protection electric interlock switch dead electricity is broken
Open, make control loop dead electricity, main switch disconnects, and emergent local fan dead electricity shuts down.
Beneficial effects of the present invention are：
Colliery local ventilation system provided by the invention provides more structurally sound colliery local ventilation with operation method, allows
Coalmine ventilation possesses reliability, redundancy, ensures that still having should in the case of main power source power-off even stand-by power supply power-off
Anxious ventilation function.
The colliery local ventilation system of the present invention possesses to charge in the case of main power source normal transmission, main power source power-off master
Automatic start standby fan in the case that blower fan is stopped work, and in the case of main power source power-off, stand-by power supply power-off, the system oneself
Start emergent local fan, local ventilation is persistently provided.
Brief description of the drawings
Fig. 1 is local ventilation system structural representation.
Fig. 2 is conversion system structure schematic diagram of the present invention.
Wherein：First diode T1, the second diode T2, isolating transformer MS1, control power transformer BK1, fire-fighting letter
Number power transformer BK2, the first filter capacitor C1, the second filter capacitor C2, main switch KM1, fire protection electric interlock switch KM2,
Main air blower electrical interlocks switchs KM3, standby fan electrical interlocks switch KM4, test switch KM5, local fan M~3 of meeting an urgent need, electricity
Pond UPS, the first safety box FU1, the second safety box FU2.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described corresponding accompanying drawing.
To achieve the above object, the local ventilation system following technical scheme in colliery of the invention that the present invention is taken.
System with installation and operation environment：The colliery of the present embodiment operation is highly gassy mine, and mine whole year gas is definitely gushed out
Measure as 18.986m3/ min, relative amount of mine gas emission 26.941m3/t；The absolute outburst amount of carbon dioxide is 6.97m3/ min is relative to gush
Output is 9.891m3/t.Mine ventilation mode is divulged information for central march-past, and method of ventilation is mechanical extraction.Its coal work
Face U-typed ventilation, driving face use forced ventilation.
The ventilating system of the present embodiment is arranged in coal cutting roadway, and to adopt face ommatidium air feed, it is maximum definitely to adopt face ommatidium
Gas emission is 0.75m3/min, all using forced local ventilation.Main air blower is arranged in headentry air intake,
Once main air blower blowing-out, it is easy to methane accumulation and transfinite.
Main air blower：Main air blower is from two FBD-2No-5 types 7.5kw blower fan, and its air quantity is 274-124m3/min, wind
354-3573pa is pressed, ensures that the air quantity in coal cutting roadway is not less than 160m3/min.
Standby fan：Required airflow 75m in coal cutting roadway3/ min, it is 80m that standby fan, which needs to suck air quantity,3/ min, work
Total head is 1343Pa.Therefore requirement can be reached from the type blower fans of FBD2*2.2kw № 4/4.4.The total pressure of fan is 251-
2156Pa, fan delivery 136-72m3/min。
Required airflow calculates during emergency ventilation：When main air blower and standby fan are stopped transport, then enter coal cutting roadway without personnel
Interior operation, air quantity are calculated by gas emission：If coal-face gas emission is up to 0.75m3/min so far, press
It is no more than 1% according to gas during coal mining ommatidium emergency power supply local ventilation to calculate：100 × 0.75=75m3/ min, required airflow
75m3/ min, it is 80m that emergent local fan, which needs to suck air quantity,3/ min, work total head are 1343Pa.Therefore FBD2* is selected
The type blower fans of 2.2kw № 4/4.4 can reach requirement.The total head of the blower fans of FBD2*2.2kw № 4/4.4 is 251-2156Pa, and air quantity is
136-72m3/ min, the use of power supply is three-phase alternating current 380V power supplys.
According to above-mentioned installation environment and requirement, the present embodiment design is as follows：
With reference to figure 1,2.
Main air blower is connected with main power source, and main switching control is set on main power source.Standby fan is connected with stand-by power supply,
And standby controlling switch is set on stand-by power supply, stand-by power supply is powered for power supply system.Main switching control and standby control
System switch chain control.Main switching control and main air blower electrical interlocks switch KM3 chain controls, standby controlling switch and standby wind
Electrical-mechanical interlock switch KM4 chain controls.
Emergent local fan M~3 are connected with battery UPS and main power source respectively by converting system；Converting system and master control
Make switch, the connection of standby controlling switch, battery, main power source.Main switching control closes at work, main air blower electrical interlocks switch
KM3 disconnects；Standby controlling switch disconnects, standby fan electrical interlocks switch KM4 closures.
Converting system includes control loop, main power circuit.Main power source inputs for exchange 660V, on main power circuit successively
After being connected with surge protection circuit, the transformer of 480V outputs, reactor, the rectified device of 660V AC powers, it is straight to obtain 480V
Flow out-put supply.
The output end connection battery of rectifier, is continuously battery charging, this is also the main function of rectifier output end.Its
The middle non-maintaining EPS batteries of Selection of Battery SAE12-38/480V, exchange 660V main power source inputs are after transformation, rectification, automatically
Battery charging parameter is adjusted, balanced floating charge conversion, temperature-compensating charging is carried out to battery according to power supply environment, electric discharge, reaches and prolong
Long battery, battery use 3~5 years.
Battery is specializes in 1 emergent local fan electricity consumption, it is ensured that working face main air blower, standby fan dead electricity at the same time
In the case of, meet an urgent need local fan be ommatidium local ventilation up to more than 4 hours, gas exceeding limit can be reduced to greatest extent, ensure
Local Ventilation Equipment in Coal Mine is reliable and operating personnel is safe.
There is frequency converter in the output end of rectifier, the input of frequency converter is provided with main switch KM1, when main switch closes
Afterwards, frequency converter will obtain 380V exchange outputs from the 480V direct currents of battery or rectifier input after inversion, for office of meeting an urgent need
Portion's blower fan power supply.Inverter input positive pole is provided with the first diode T1, between the first diode and inverter input
Also set up the first safety box FU1.The 480V direct currents of input are converted into power frequency 50Hz sine three-phase alternating currents by frequency converter by inversion
380V power supplys, emergent local fan three-phase alternating current 380V power supplys are supplied, accelerate to start using frequency converter here, emergent office can be reduced
Portion's blower fan abrasion, improve the reliability and service life of emergent local fan.
The output end of rectifier is connected with fire-fighting signal constant current source output unit, is exported by being linked in sequence in rectifier
The fire-fighting signal power supply of isolating transformer MS1,24V direct current output of IGBT, 220V exchange output of the 240V exchange outputs at end
Transformer BK2, transformer, fire-fighting signal loop are formed.IGBT inputs are provided with the first filtered electrical between positive pole and negative pole
Hold C1；IGBT inputs set the second safety box FU2, the second diode T2 in positive pole；The positive pole of isolating transformer output end with
Second filter capacitor C2 is set between negative pole.IGBT uses the 6th generation IGBT speed-sensitive switch characteristic, has high voltage and high current
Working characteristics；Voltage-type drives, while has lower saturation voltage drop, and inverter operating efficiency reliability is high.
Fire-fighting signal power transformer BK2 input is connected with main power circuit, fire-fighting signal power transformer it is defeated
Enter end-coil and carry centre cap, centre cap is connected with isolating transformer MS1.In the case where system runs well, fire-fighting
Signal power source transformer gives electricity by isolating transformer by IGBT by centre cap, when main power circuit breaks down, isolation
Transformer dead electricity, then fire-fighting signal power transformer persistently have electricity to electricity, protection fire-fighting signal loop by input end-coil.
The control loop of the present embodiment includes the control power transformer BK1 from main power circuit power taking, and control power supply becomes
Depressor is 36V direct current outputs, is in series with main switch KM1 electromagnetic control coil, main air blower between output cathode and negative pole respectively
Electrical interlocks switch KM3, standby fan electrical interlocks switch KM4, fire protection electric interlock switch KM2, and in control power supply transformation
Loop is formed between the output cathode and negative pole of device.The electromagnetic control coil of fire protection electric interlock switch is serially connected in fire-fighting signal and returned
Lu Zhong, is provided with the probe for monitoring fire fighting state, and fire protection electric interlock switch KM2 is normally closed.
Fire-fighting signal power transformer BK2, isolating transformer MS1, control power transformer BK1 pass through Surge Protector
Locate connecting to neutral.
The present invention the basic operating structure of colliery local ventilation system be：When mine power supply is normal, first by main power source
To main air blower powered operation, standby fan and emergent local fan are stopped transport, and are in stand-by state.
When main power source electric power system failure dead electricity, automatically switch and standby fan operation supplied electricity to by power supply system,
Main air blower and emergent local fan are stopped transport.
When underground power supply system whole dead electricity, the equal dead electricity of main power source, power supply system, main air blower and standby fan stop
Fortune,
Because of main switching control and main air blower electrical interlocks switch chain control, standby controlling switch electrically connects with standby fan
Lock-switch chain control, main air blower and standby fan provide converting system of the stopping signal to the present embodiment, converting system simultaneously
Automatic switching starts the connection of battery and emergent local fan, allows battery to be that emergent local fan is powered, to tunnel moraine head air feed.
The detailed process of its work is as follows：
(1), main switching control is closed, main air blower normal operation, and branch road air duct and the air door of main wind tube junction are closed, main
Blower fan air feed into main wind tube；The main power source for exchanging 660V is clean by obtaining stablizing after transformer, reactor, rectifier
480V dc sources, and directly charged to battery；；
(2), when main power source disconnects without plan dead electricity, main switching control, main air blower is stopped work, and standby controlling switch closure is standby
It is connected with blower fan with stand-by power supply, standby fan operating；The main air door of main air blower and main wind tube junction is closed, standby fan with
Air door at the branch road air duct of main wind tube connection is opened, and standby fan is to main wind tube air feed；
(3), when main power source loses without plan dead electricity, stand-by power supply without plan dead electricity, main switching control and standby controlling switch
It is electrically disconnected, main air blower electrical interlocks switch is closed with standby fan electrical interlocks switch, control loop conducting, the control of main switch
Circuit processed obtains electric, closes main switch, and the AC power that the 480V dc sources of battery are converted to 380V by frequency converter inputs
To emergent local fan, emergent local fan obtains electric operation at battery, at the branch road air duct that standby fan is connected with main wind tube
Air door close, the air door opening at the branch road air duct that emergent local fan be connected with main wind tube, emergent local fan is to main wind
Cylinder air feed；The emergency power supply system automatic switching function switching time can be arranged as required to, and set the time in 1s~600s scopes
It is any to set.When main air blower, any one of standby fan recover operating, converting system stops powering to emergent local fan,
So as to realize that three ring currents are powered and can automatically switched to three Fans respectively.
(4) local fan, is met an urgent need to during main wind tube air feed, and probe is abnormal to monitoring fire fighting state, and fire-fighting signal is returned
Road is disconnected, and fire protection electric interlock switch dead electricity disconnects, and makes control loop dead electricity, and main switch disconnects, and emergent local fan dead electricity is stopped
Only operate.
In the present embodiment, when underground power supply system whole dead electricity is (when main power source loses without plan dead electricity, stand-by power supply without plan
Electricity), when main air blower, standby fan are all out of service, can the emergent local fan of automatic switching operation, otherwise, lack one and shut down letter
It number can not all realize that automatic switching is run.At work, it should be dc source in the present embodiment and designs overload protection：Work as load
When power is less than power output 120% more than power output 100% or bearing power, disconnection output electricity is automatically controlled after 1S clocks
Pressure；When bearing power is more than power output 120%, disconnection output voltage is also automatically controlled after 1S clocks.
Air duct：The colliery local ventilation system of the present invention, is arranged in coal cutting roadway, from main wind tube to tunnelling moraine head
Air feed.A diameter of more than the 500mm of main wind tube, the air door between main wind tube and branch road air duct can be selected portable plate design, that is, select one
The block exterior contour turnover panel suitable with diameter and main wind tube interior diameter, the side of turnover panel lead to loose-leaf and are arranged on branch road air duct and main wind
Cylinder junction, when main air blower is blown, blast blows turnover panel and rotated around loose-leaf, turns over to branch road air duct mouth, and cover branch road branch
Transportation work style nozzle, prevent distinguished and admirable to branch road air duct in main wind tube；When standby fan is blown, blast blows turnover panel and revolved around loose-leaf
Turn, turn over to main air blower side, and cover the junction of main wind tube and main air blower, prevent the distinguished and admirable at main air blower of branch road air duct.
Test switch KM5 is additionally provided with control loop, test switch is normally open；Test switch is simultaneously connected in main air blower
Electrical interlocks switch, standby fan electrical interlocks switch.Specially：Main air blower electrical interlocks switchs and standby fan electrical interlocks
Switch series winding, the output end of wherein standby fan electrical interlocks switch are connected to the input of main air blower electrical interlocks switch, examination
The input for testing switch is connected to the input of standby fan electrical interlocks switch, and the output end of test switch is connected to main air blower
The output end of electrical interlocks switch.When need individually detection battery and emergent local fan between circuit whether normally
When, test switch KM5 can be pressed, makes main switch KM1 electromagnetic control coil powered, main switch adhesive.
To detect working order, the present invention carries out the Fans switching tests of three-way power three daily.Concrete operations are as follows：
First main air blower is allowed to stop during experiment, standby fan controlling switch 3~5 seconds automatic picks of delay, standby fan operating.
Whether the turnover panel of branch road air duct and main wind tube after standby fan operating to turn a work page conversion normal if being checked.If main air blower operates
Main air blower stop button is pressed, can not start standby fan in 5 seconds should recover main air blower operating manually immediately.
After checking that main air blower, standby fan switching are normal, while stop main air blower, standby fan 5 second time of operating, observation
Emergent local fan whether can in 30 seconds automatic start, if can normally start, in time manually recover main air blower operation.If
The emergent local fan of automatic start is unable in 30 seconds must then recover main air blower operating manually in time.
When only doing switching tests or main air blower or standby fan all without electricity, it can be powered to emergent local fan；Work as master
Blower fan or standby fan have a power failure when can not run well simultaneously, it is necessary to timely processing, restore electricity as early as possible, when main air blower or standby
When any one of blower fan recovers electric as far as possible, it is necessary to recover the operating of main air blower or standby fan in time, avoid using for a long time
Emergent local fan air feed, prevents power depletion from causing moraine head blowing-out.
Tunnel stops driving, without being responsible for disconnecting the charging to battery and main switch from regional maintenance electrician during air feed
KM1, so as not to longtime running meet an urgent need local fan and influence the service life of dc source.
The present embodiment field investigation mode is as follows：
Close EPS charge power supplies；
Local fan of being met an urgent need after main air blower and standby fan simultaneously close off, after 7 seconds starts to start, and is met an urgent need after 45 seconds local
Blower fan normal operation, reaches design air flow.
Measured after emergent local fan normal operation：
Cell voltage 519V；Frequency converter output voltage 380V, electric current 9A；Coal mining ommatidium air quantity 110m3/ min, gas density
0.11%.
Emergent local fan normal operation measures after 30 minutes：
Cell voltage 518V；Frequency converter output voltage 380V, electric current 9A；Coal mining ommatidium air quantity 110m3/ min, gas density
0.11%.
Main air blower is started after the completion of above step, emergent local fan is observed and stops；Interval main air blower and standby after 5 minutes
Blower fan simultaneously closes off, then observes emergent local fan normal starting；Interval starts standby fan after 5 minutes, then observes emergent office
Portion's blower fan stops；Therefore emergent local fan by above step experiment can normal starting and stopping, off-test.
The present embodiment is not influenceed as independent tertiary circuit power supply by ground wind and rain thunder and lightning, not by other places of underground
Voltage, current fluctuation and the influence of failure, mine is avoided because of the gas exceeding limit brought without scheduled outage blowing-out, does not influence to give birth to
Production, improves the performance of enterprises.
Above-mentioned embodiment is used for illustrating the present invention, rather than limits the invention, in the spirit of the present invention
In scope of the claims, to any modifications and changes of the invention made, protection scope of the present invention is both fallen within.
Claims (9)
1. a kind of colliery local ventilation system, is arranged in coal cutting roadway, including air duct and the wind for being connected to main wind tube air intake
Machine device；Characterized in that, described blower fan apparatus includes the main air blower to run well, for main air blower without being opened after scheduled shutdown
Dynamic standby fan, when can not start without scheduled shutdown and standby fan for main air blower and the emergent local fan that starts；
Main air blower is connected with main wind tube, and main air door is set in junction, and standby fan, emergent local fan pass through branch road air duct respectively
It is connected to main wind tube；Branch road air duct is provided with air door with main wind tube junction；Described main air blower, standby fan, meet an urgent need local
Blower fan is connected with electric power system；Specially：
Described main air blower is connected with main power source, and main switching control is set on main power source；
Described standby fan is connected with stand-by power supply, and standby controlling switch is set on stand-by power supply；
Described main switching control and standby controlling switch chain control；
Described emergent local fan is connected by converting system with battery, and battery is connected by converting system with main power source；Institute
The converting system stated is connected with main switching control, standby controlling switch, is met an urgent need local fan, battery, main electricity for chain control
Circuit opening and closing between source.
A kind of 2. colliery local ventilation system as claimed in claim 1, it is characterised in that converting system include control loop,
Main power circuit；
Described main power circuit is connected to main power source, is connected with surge protection circuit, transformer, electricity on main power circuit in turn
Anti- device, rectifier, frequency converter, the emergent local fan of frequency converter connection are connected in the output end of rectifier；The output end of rectifier
It is connected to battery；Fire-fighting signal constant current source output unit is connected with the output end of rectifier；Set in the input of frequency converter
It is equipped with main switch；
Described control loop includes the control power transformer from main power circuit power taking, is controlling the output of power transformer just
The electromagnetic control coil, main air blower electrical interlocks switch, standby fan for being in series with main switch between pole and negative pole respectively electrically connect
Lock-switch, fire protection electric interlock switch, and form loop between the output cathode and negative pole of control power transformer；
Described main switching control electrically connects with main air blower electrical interlocks switch chain control, standby controlling switch with standby fan
Lock-switch chain control；Main switching control is normally opened, main air blower electrical interlocks switch is normally closed；Standby controlling switch is normally opened, standby wind
Electrical-mechanical interlock switch is normally closed；Main switch is normally opened.
A kind of 3. colliery local ventilation system as claimed in claim 2, it is characterised in that described fire-fighting signal constant current source
Output unit includes the IGBT in rectifier output end, isolating transformer, fire-fighting signal power transformer, mutual inductance is linked in sequence
Device, fire-fighting signal loop；Probe, the fire protection electric interlock switch for monitoring fire fighting state are provided with fire-fighting signal loop
Electromagnetic control coil.
4. a kind of colliery local ventilation system as claimed in claim 2 or claim 3, it is characterised in that described power input is
Exchange 660V inputs；Transformer exports for 480V；Rectifier is 480V direct current outputs；Frequency converter is 380V exchange outputs；Control
Power transformer is 36V direct current outputs；Described IGBT is 240V exchange outputs；Isolating transformer is 220V exchange outputs；Disappear
Anti- signal power source transformer is 24V direct current outputs.
A kind of 5. colliery local ventilation system as claimed in claim 2, it is characterised in that described inverter input positive pole
It is provided with the first diode, the output end connection inverter input of the first diode；Inputted in the first diode and frequency converter
The first safety box is also set up between end.
6. a kind of colliery local ventilation system as claimed in claim 3, it is characterised in that described IGBT inputs are in positive pole
The first filter capacitor is provided between negative pole；IGBT inputs set the second safety box, the second diode in positive pole；Described
The second filter capacitor is set between the positive pole and negative pole of isolating transformer output end；
The input of described fire-fighting signal power transformer is connected with main power circuit, the input of fire-fighting signal power transformer
End-coil carries centre cap, and centre cap is connected with isolating transformer.
7. a kind of colliery local ventilation system as claimed in claim 2, it is characterised in that also set up in described control loop
There is test switch, described test switch is simultaneously connected in main air blower electrical interlocks switch, standby fan electrical interlocks switch；Specifically
For：Main air blower electrical interlocks switchs contacts with standby fan electrical interlocks switch, and wherein standby fan electrical interlocks switch is defeated
Go out the input that end is connected to main air blower electrical interlocks switch, the input of test switch is connected to standby fan electrical interlocks and opened
The input of pass, the output end of test switch are connected to the output end of main air blower electrical interlocks switch.
8. a kind of operation method of colliery local ventilation system, it is characterised in that as follows：
(1), main switching control is closed, main air blower normal operation, and branch road air duct and the air door of main wind tube junction are closed, main air blower
The air feed into main wind tube；Main power source is charged by converting system to battery；
(2), when main power source disconnects without plan dead electricity, main switching control, main air blower is stopped work, standby controlling switch closure, standby wind
Machine is connected with stand-by power supply, standby fan operating；Main air blower and the main air door of main wind tube junction are closed, standby fan and main wind
Air door at the branch road air duct of cylinder connection is opened, and standby fan is to main wind tube air feed；
(3), when main power source closes main switch, local fan of meeting an urgent need is from battery without plan dead electricity, stand-by power supply without plan dead electricity
Place obtains electric operation, and the air door at the branch road air duct that standby fan is connected with main wind tube is closed, and local fan of meeting an urgent need connects with main wind tube
Air door at the branch road air duct connect is opened, and local fan of meeting an urgent need is to main wind tube air feed；
(4) local fan, is met an urgent need to during main wind tube air feed, and fire fighting state is abnormal, emergent local fan dead electricity is stopped fortune
Turn.
A kind of 9. operation method of colliery local ventilation system as claimed in claim 8, it is characterised in that described main power source
It is specially to battery charging by converting system：The main power source for exchanging 660V is steady by being obtained after transformer, reactor, rectifier
Fixed clean 480V dc sources, and directly charged to battery；
Described emergent local fan obtains electric operation at battery, is specially：Main switching control and standby controlling switch dead electricity are broken
Open, main air blower electrical interlocks switch is closed with standby fan electrical interlocks switch, control loop conducting, the control electricity of main switch
Rood electricity, main switch closure, the 480V dc sources of battery by frequency converter be converted to 380V AC power be input to it is emergent
Local fan, make emergent local fan operating；
Described fire fighting state is abnormal, emergent local fan dead electricity is shut down, is specially：Emergent local fan is to main wind tube
During air feed, probe is abnormal to monitoring fire fighting state, and fire-fighting signal loop disconnects, and fire protection electric interlock switch dead electricity disconnects,
Make control loop dead electricity, main switch disconnects, and emergent local fan dead electricity shuts down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711285941.4A CN107795333B (en) | 2017-12-07 | 2017-12-07 | Local ventilation system for coal mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711285941.4A CN107795333B (en) | 2017-12-07 | 2017-12-07 | Local ventilation system for coal mine |
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| CN107795333A true CN107795333A (en) | 2018-03-13 |
| CN107795333B CN107795333B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711285941.4A Active CN107795333B (en) | 2017-12-07 | 2017-12-07 | Local ventilation system for coal mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196822A (en) * | 2020-10-10 | 2021-01-08 | 辽宁华融富瑞新能源科技股份有限公司 | Emergency fan system for hydrogen energy triple supply |
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| CN207598282U (en) * | 2017-12-07 | 2018-07-10 | 四川广旺能源发展（集团）有限责任公司赵家坝煤矿 | A kind of coal mine local ventilation system |
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| JPH08165900A (en) * | 1994-09-08 | 1996-06-25 | Toshiba Corp | Road tunnel ventilation control device |
| CN202218062U (en) * | 2011-08-25 | 2012-05-09 | 湖南创安防爆电器有限公司 | Automatic switching circuit used for switching between main power source and standby power source of coal mine draught fan |
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| CN112196822A (en) * | 2020-10-10 | 2021-01-08 | 辽宁华融富瑞新能源科技股份有限公司 | Emergency fan system for hydrogen energy triple supply |
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| CN107795333B (en) | 2024-03-08 |
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Effective date of registration: 20231110 Address after: 628200 Tianchi Village, Huangyang Town, Wangcang County, Guangyuan City, Sichuan Province Applicant after: ZHAOJIABA coal mine of Sichuan coal Huarong Energy Co.,Ltd. Address before: 628000 Huangyang Town, Wangcang County, Guangyuan City, Sichuan Province Applicant before: ZHAOJIABA COAL MINE OF SICHUAN GUANGWANG ENERGY DEVELOPMENT (GROUP) CO.,LTD. |
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