CN207598282U - A kind of coal mine local ventilation system - Google Patents

A kind of coal mine local ventilation system Download PDF

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Publication number
CN207598282U
CN207598282U CN201721690205.2U CN201721690205U CN207598282U CN 207598282 U CN207598282 U CN 207598282U CN 201721690205 U CN201721690205 U CN 201721690205U CN 207598282 U CN207598282 U CN 207598282U
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China
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main
switch
fan
air blower
control
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Inventor
何智
冉波
董太华
陈志强
邹方国
张克浩
陈雄
丁永多
何勇军
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Sichuan Guang Wang Energy Development (group) Co Ltd Zhao Xiangjiaba Coal Mine
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Sichuan Guang Wang Energy Development (group) Co Ltd Zhao Xiangjiaba Coal Mine
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Abstract

The utility model discloses a kind of coal mine local ventilation systems, the utility model is arranged in coal cutting roadway, the main air blower being connect including air duct, with main power source, the standby fan, the emergent local fan that are connect with stand-by power supply, emergent local fan are connect by converting system with battery and main power source respectively;Converting system and the control circuit of main switching control, the control circuit of spare control switch, battery, main power source connect.The operation method of the utility model is:Main switching control is closed, 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 utility model has reliability, redundancy by coalmine ventilation, ensures in the case of main power source power-off even stand-by power supply power-off, still there is emergency ventilation function.

Description

A kind of coal mine local ventilation system
Technical field
The utility model is specifically related to a kind of Link Between Mine Ventilation Safety Systems, especially coal mine roadway local ventilation system.
Background technology
According to statistics, 80% probability of gas explosion that underground coal mine occurs is related with local ventilation.Pre- anti-gas explosion Emphasis should be the driving face using local ventilation, most of with part in the gas accident caused by the local ventilation problem Ventilation blower shuts down related.Therefore how research improves the reliability of local ventilation, reduces blowing-out number as far as possible, to prevention Gas accident is of great significance.
With the development of mine machinery, electrical equipment especially high-power electric appliance equipment is more and more, these are high-power When power supply unit works together, the problem of harmonic component of generation 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 inevitably leads to two fans, and dead electricity is stopped simultaneously, influences the reliability of local ventilation, threatens ventilating gas peace Entirely.For this purpose, further research improves local ventilation reliability, protect it from wind and rain thunder and lightning and avoid the shadow used by other equipment It rings, still has a very important 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, is influenced 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, leads to 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 Production standardization must reach more than three-level, not stop producing immediately up to the mine of grade.This means that it sends 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 under any circumstance when needing local ventilation.
Utility model content
The purpose of the utility model is to overcome the shortcomings that the prior art, providing a kind of coal mine roadway local ventilation system, To solve the technical issues of aeration technology in existing mining lacks more reliable property and redundancy.
To achieve the above object, technical solution adopted in the utility model is:
The coal mine local ventilation system of the utility model, is arranged in coal cutting roadway, including air duct and is connected to main wind tube The blower fan apparatus of air intake;Blower fan apparatus includes the main air blower to run well, standby without what is started after scheduled shutdown for main air blower With wind turbine, when can not start without scheduled shutdown and standby fan for main air blower and the emergent local fan that starts.Main air blower It is connect with main wind tube, and main air door is set in junction, standby fan, emergent local fan are connected to respectively by branch air duct Main wind tube.Branch air duct is provided with air door with main wind tube junction.The main air blower, standby fan, meet an urgent need local fan with Electric power system connects.Specially:
The main air blower is connect with main power source, and main switching control is set on main power source.
The standby fan is connect with stand-by power supply, and spare control switch is set on stand-by power supply.
The main switching control switchs chain control with spare control.
The emergent local fan is connect by converting system with battery, and battery is connected by converting system and main power source It connects.The converting system and main switching control, spare control switch connection, for chain control meet an urgent need local fan, battery, Circuit opening and closing between main power source.
A kind of coal mine local ventilation system as described above is illustrated further as converting system includes control loop, master Electric power loop.
The 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 connect frequency converter, the emergent local fan of frequency converter connection in the output terminal of rectifier.Rectifier it is defeated Outlet is connected to battery.Fire-fighting signal constant current source output unit is connected in the output terminal of rectifier.In the input of frequency converter End is provided with main switch.
The control loop includes taking the control power transformer of electricity from main power circuit, controls the defeated of power transformer Go out between positive electrode and negative electrode 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 be formed into a loop between the output cathode and cathode of control power transformer.
The main switching control switchs chain control, spare control switch and standby fan electricity with main air blower electrical interlocks Gas interlock switch chain control.Main switching control is normally opened, main air blower electrical interlocks switch is normally closed;Spare control switch is normally opened, standby It is switched with wind turbine electrical interlocks normally closed;Main switch is normally opened.
A kind of coal mine local ventilation system as described above, illustrates further as the 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 circuit.It is provided with to monitor the probe of fire fighting state, fire protection electric interlock switch on fire-fighting signal circuit Electromagnetic control coil.
A kind of coal mine local ventilation system as described above is illustrated further as the power input is exchange 660V is inputted.Transformer is exported for 480V.Rectifier is 480V direct current outputs.Frequency converter is 380V exchange outputs.Control power supply Transformer is 36V direct current outputs.The 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 coal mine local ventilation system as described above, illustrates further as the inverter input anode It is provided with the first diode, the output terminal connection inverter input of the first diode.It is inputted in the first diode and frequency converter The first safety box is also set up between end.
A kind of coal mine local ventilation system as described above, illustrates further as the IGBT input terminals are in anode The first filter capacitor is provided between cathode.IGBT input terminals set the second safety box, the second diode in anode.Described Second filter capacitor is set between the positive electrode and negative electrode of isolating transformer output terminal.
The input terminal of the fire-fighting signal power transformer is connect with main power circuit, fire-fighting signal power transformer End-coil is inputted with centre cap, centre cap is connect with isolating transformer.
A kind of coal mine local ventilation system as described above, illustrates further to be also set up in the control loop There is test switch, the test switch is simultaneously connected in main air blower electrical interlocks switch, standby fan electrical interlocks switch.Specifically For:Main air blower electrical interlocks is switched contacts with standby fan electrical interlocks switch, and wherein standby fan electrical interlocks switch is defeated Outlet is connected to the input terminal of main air blower electrical interlocks switch, and the input terminal of test switch is connected to standby fan electrical interlocks and opens The input terminal of pass, the output terminal of test switch are connected to the output terminal of main air blower electrical interlocks switch.
It is as follows the invention also discloses a kind of operation method of coal mine local ventilation system:
(1), main switching control is closed, main air blower normal operation, and branch air duct and the air door of main wind tube junction are closed, main Wind turbine air feed into main wind tube;Main power source is charged by converting system to battery;
(2), when main power source is without plan dead electricity, main switching control disconnects, and main air blower is stopped work, and spare control switch is closed, standby It is connect with wind turbine 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 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, be closed main switch, meet an urgent need local fan from Obtain electric operation at battery, the air door at the branch air duct that standby fan is connect with main wind tube is closed, meet an urgent need local fan and main wind Air door at the branch 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 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 coal mine local ventilation system as described above, more one is into explanation, and the main power source leads to Cross converting system is specially to battery charging:The main power source of 660V is exchanged by being stablized after transformer, reactor, rectifier Clean 480V DC power supplies, and directly charge to battery;
The emergent local fan obtains electric operation at battery, specially:Main switching control and spare control switch lose It is electrically disconnected, main air blower electrical interlocks switch is made to be closed with standby fan electrical interlocks switch, control loop conducting, the control of main switch Circuit processed obtains electric, and main switch is closed, and the AC power that the 480V DC power supplies of battery are converted to 380V by frequency converter is input to Emergent local fan makes emergent local fan operating;
The fire fighting state is abnormal, emergent local fan dead electricity is made to shut down, specially:Emergent local fan is to master During air duct air feed, probe is abnormal to monitoring fire fighting state, and fire-fighting signal circuit disconnects, and fire protection electric interlock switch dead electricity is broken It opens, makes control loop dead electricity, main switch disconnects, and emergent local fan dead electricity shuts down.
The beneficial effects of the utility model are:
Coal mine local ventilation system provided by the utility model provides more structurally sound coal mine with operation method and locally leads to Wind allows coalmine ventilation to have reliability, redundancy, ensures in the case of main power source power-off even stand-by power supply power-off, still So there is emergency ventilation function.
The coal mine local ventilation system of the utility model has to charge in the case of main power source normal transmission, and main power source breaks Electric main air blower starts standby fan automatically in the case of stopping work, and in the case of main power source power-off, stand-by power supply power-off, this system Initiate by its own is met an urgent need local fan, persistently provides local ventilation.
Description of the drawings
Fig. 1 is local ventilation system structure diagram.
Fig. 2 is the utility model conversion system structure schematic diagram.
Wherein:First diode T1, the second diode T2, isolating transformer MS1 controls 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.
Specific embodiment
It is specific below in conjunction with the utility model to make the purpose of this utility model, technical solution and advantage clearer Technical solutions of the utility model are clearly and completely described in embodiment and corresponding attached drawing.
To achieve the above object, the following technology of coal mine local ventilation system of the utility model that the utility model is taken Scheme.
System with installation and operation environment:The coal mine of the present embodiment operation is highly gassy mine, and mine whole year gas is absolutely gushed out It measures 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 opposite to gush Output is 9.891m3/t.Mine ventilation mode is that central march-past is divulged information, 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 mounted in coal cutting roadway, and to adopt face ommatidium air feed, it is maximum absolutely to adopt face ommatidium Gas emission is 0.75m3/min, all using forced local ventilation.Main air blower is mounted in headentry air intake, Once main air blower blowing-out, it is easy to methane accumulation and transfinite.
Main air blower:Main air blower selects the wind turbine of two FBD-2No-5 types 7.5kw, air quantity 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 select 4/4.4 type wind turbines of FBD2*2.2kw № that can reach requirement.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 working 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 4/4.4 type wind turbines of 2.2kw № can reach requirement.The total head of 4/4.4 wind turbines of FBD2*2.2kw № is 251-2156Pa, and air quantity is 136-72m3/ min is three-phase alternating current 380V power supplys using power supply.
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 connect with main power source, and main switching control is set on main power source.Standby fan is connect with stand-by power supply, And spare control switch is set on stand-by power supply, stand-by power supply is powered for power supply system.Main switching control and spare control System switch chain control.Main switching control switchs KM3 chain controls, spare control switch and spare wind with main air blower electrical interlocks Electrical-mechanical interlock switch KM4 chain controls.
Emergent local fan M~3 are connect by converting system with battery UPS and main power source respectively;Converting system and master control System switch, spare control switch, battery, main power source connection.Main switching control is closed at work, main air blower electrical interlocks switch KM3 is disconnected;Spare control switch disconnects, and standby fan electrical interlocks switch KM4 is closed.
Converting system includes control loop, main power circuit.Main power source is inputted 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 terminal connection battery of rectifier, is continuously battery charging, this is also the main function of rectifier output end.Its The middle non-maintaining EPS accumulators of Selection of Battery SAE12-38/480V, exchange 660V main power source inputs are after transformation, rectification, automatically Battery charging parameter is adjusted, carries out balanced floating charge conversion, temperature-compensating charging to battery according to power supply environment, electric discharge reaches and prolongs 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 for ommatidium local ventilation up to 4 hours or more, gas exceeding limit can be reduced to the maximum extent, ensure Local Ventilation Equipment in Coal Mine is reliable and operating personnel is safe.
There is frequency converter in the output terminal of rectifier, the input terminal of frequency converter is provided with main switch KM1, when main switch is closed 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 wind turbine power supply.Inverter input anode 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 supply emergent local fan three-phase alternating current 380V power supplys, accelerate to start using frequency converter here, can reduce emergent office Portion's wind turbine abrasion improves the reliability and service life of emergent local fan.
The output terminal 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, mutual inductor, fire-fighting signal circuit are formed.IGBT input terminals are provided with the first filtered electrical between positive electrode and negative electrode Hold C1;IGBT input terminals set the second safety box FU2, the second diode T2 in anode;The anode of isolating transformer output terminal with Second filter capacitor C2 is set between cathode.IGBT uses the 6th generation IGBT high-speed switch characteristic, has high voltage and high current Working characteristics;Voltage-type drives, while has lower saturation voltage drop, and inverter working efficiency reliability is high.
The input terminal of fire-fighting signal power transformer BK2 is connect with main power circuit, fire-fighting signal power transformer it is defeated Enter end-coil with centre cap, centre cap is connect 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 for fire-fighting signal power transformer by input end-coil to electricity, persistently there is electricity in protection fire-fighting signal circuit.
The control loop of the present embodiment includes taking the control power transformer BK1 of electricity from main power circuit, and control power supply becomes Depressor is 36V direct current outputs, is in series with electromagnetic control coil, the main air blower of main switch KM1 between output cathode and cathode respectively Electrical interlocks switch KM3, standby fan electrical interlocks switch KM4, fire protection electric interlock switch KM2, and in control power supply transformation It is formed into a loop between the output cathode and cathode of device.The electromagnetic control coil of fire protection electric interlock switch is serially connected in fire-fighting signal and returns 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 Place connects zero.
The basic operating structure of coal mine local ventilation system of the utility model is:When mine power supply is normal, first by leading Power supply is stopped transport to main air blower powered operation, standby fan and emergent local fan, is in stand-by state.
When main power source electric power system failure dead electricity, automatically switch to supply electricity to standby fan operation 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 main switching control and main air blower electrical interlocks switch chain control, spare control 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, battery is allowed 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 air duct and the air door of main wind tube junction are closed, main Wind turbine air feed into main wind tube;The main power source for exchanging 660V is stablized totally by being obtained after transformer, reactor, rectifier 480V DC power supplies, and directly charge to battery;;
(2), when main power source is without plan dead electricity, main switching control disconnects, and main air blower is stopped work, and spare control switch is closed, standby It is connect with wind turbine 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 air duct of main wind tube connection is opened, and standby fan is to main wind tube air feed;
(3), when main power source is without plan dead electricity, stand-by power supply loses without plan dead electricity, main switching control and spare control switch It is electrically disconnected, main air blower electrical interlocks switch is made to be closed with standby fan electrical interlocks switch, control loop conducting, the control of main switch Circuit processed obtains electric, is closed main switch, and the AC power that the 480V DC power supplies 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 air duct that standby fan is connect with main wind tube Air door close, the air door opening at the branch air duct that emergent local fan connect 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 the setting time is in 1s~600s ranges Arbitrary setting.When main air blower, any one of standby fan restore operating, converting system stops powering to emergent local fan, It powers and can automatically switch to three Fans respectively so as to fulfill three ring currents.
(4), local fan is met an urgent need during main wind tube air feed, and probe is abnormal to monitoring fire fighting state, and fire-fighting signal is returned Road disconnects, 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, (when main power source is without plan dead electricity, stand-by power supply loses 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 all can not achieve automatic switching operation.At work, it should be DC power supply in the present embodiment and designs overload protection:Work as load When power is more than output power 100% or bearing power less than output power 120%, disconnection output electricity is automatically controlled after 1S clocks Pressure;When bearing power is more than output power 120%, disconnection output voltage is also automatically controlled after 1S clocks.
Air duct:The coal mine local ventilation system of the utility model, 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 air duct can be selected movable plate design, that is, select Select one piece of exterior contour and diameter and the comparable turnover panel of main wind tube interior diameter, the side of turnover panel lead to loose-leaf mounted on branch air duct with Main wind tube junction, when main air blower is blown, wind pressure blows turnover panel and is rotated around loose-leaf, turns over to branch air duct mouth, and cover branch Road branch air duct mouth prevents distinguished and admirable to branch air duct in main wind tube;When standby fan is blown, wind pressure blows turnover panel around work Page rotation, turns over to main air blower side, and cover the junction of main wind tube and main air blower, prevents the distinguished and admirable to main air blower of branch air duct Place.
Test switch KM5 is additionally provided in 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 terminal of wherein standby fan electrical interlocks switch are connected to the input terminal of main air blower electrical interlocks switch, examination The input terminal for testing switch is connected to the input terminal of standby fan electrical interlocks switch, and the output terminal of test switch is connected to main air blower The output terminal of electrical interlocks switch.When need individually detection battery and emergent local fan between circuit whether normally When, test switch KM5 can be pressed, charges the electromagnetic control coil of main switch KM1, main switch is attracted.
To detect working order, the utility model carries out three Fans switching tests of three-way power daily.Concrete operations are such as Under:
First main air blower is allowed to stop during experiment, standby fan control 3~5 seconds automatic picks of switch time delay, standby fan operating. Whether the turnover panel of branch 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, cannot start standby fan in 5 seconds should restore main air blower operating manually immediately.
After checking that main air blower, standby fan switching are normal, it is simultaneously stopped main air blower, standby fan operates 5 second time, observation Whether emergent local fan can automatically start in 30 seconds, if can normally start, restore main air blower operation manually in time.If Emergent local fan cannot be started in 30 seconds automatically must then restore main air blower operating manually in time.
When only doing switching tests or main air blower or standby fan all without electricity, it can power to emergent local fan;Work as master Wind turbine or standby fan have a power failure simultaneously when cannot run well, it is necessary to which timely processing restores electricity as early as possible, when main air blower or spare When any one of wind turbine restores electric, it is necessary to restore the operating of main air blower or standby fan in time, avoid using for a long time as possible Emergent local fan air feed, prevents power depletion from leading to moraine head blowing-out.
Tunnel stops driving, and the charging to battery and main switch are disconnected without being responsible for during air feed from regional maintenance electrician KM1, the local fan in order to avoid longtime running is met an urgent need and the service life for influencing DC power supply.
The present embodiment field investigation mode is as follows:
Close EPS charge power supplies;
Local fan of meeting an urgent need after main air blower and standby fan simultaneously close off, after 7 seconds starts to start, part of meeting an urgent need after 45 seconds Wind turbine normal operation, reaches design air flow.
It is 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 spare after five minutes Wind turbine simultaneously closes off, then observes emergent local fan normal starting;Interval starts standby fan, then observe emergent office after five minutes Portion's wind turbine stops;Therefore emergent local fan by above step experiment can normal starting and stopping, off-test.
The present embodiment is independent tertiary circuit power supply not to be influenced by ground wind and rain thunder and lightning, not by other places of underground Voltage, current fluctuation and the influence of failure avoid the gas exceeding limit that mine is brought by no scheduled outage blowing-out, do not influence to give birth to Production, improves the performance of enterprises.
The above embodiment is used for illustrating the utility model rather than limiting the utility model, in this reality With in novel spirit and scope of the claims, to any modifications and changes that the utility model is made, this is both fallen within The protection domain of utility model.

Claims (7)

1. a kind of coal mine local ventilation system, is arranged in coal cutting roadway, including air duct and it is connected to the wind of main wind tube air intake Machine device;It is characterized in that, the 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 connect with main wind tube, and main air door is set in junction, and standby fan, emergent local fan pass through branch air duct respectively It is connected to main wind tube;Branch air duct is provided with air door with main wind tube junction;The main air blower, standby fan, part of meeting an urgent need Wind turbine is connect with electric power system;Specially:
The main air blower is connect with main power source, and main switching control is set on main power source;
The standby fan is connect with stand-by power supply, and spare control switch is set on stand-by power supply;
The main switching control switchs chain control with spare control;
The emergent local fan is connect by converting system with battery, and battery is connected by converting system with main power source;Institute The converting system stated and main switching control, spare control switch connection are met an urgent need local fan, battery, main electricity for chain control Circuit opening and closing between source.
2. a kind of coal mine local ventilation system as described in claim 1, which is characterized in that converting system include control loop, Main power circuit;
The 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 connect frequency converter, the emergent local fan of frequency converter connection in the output terminal of rectifier;The output terminal of rectifier It is connected to battery;Fire-fighting signal constant current source output unit is connected in the output terminal of rectifier;It is set in the input terminal of frequency converter It is equipped with main switch;
The control loop includes taking the control power transformer of electricity from main power circuit, 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 cathode respectively electrically connect Lock-switch, fire protection electric interlock switch, and be formed into a loop between the output cathode and cathode of control power transformer;
The main switching control switchs chain control with main air blower electrical interlocks, and spare control switch electrically connects with standby fan Lock-switch chain control;Main switching control is normally opened, main air blower electrical interlocks switch is normally closed;Spare control switchs normally opened, spare wind Electrical-mechanical interlock switch is normally closed;Main switch is normally opened.
A kind of 3. coal mine local ventilation system as claimed in claim 2, which is characterized in that the 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 circuit;It is provided with to monitor the probe of fire fighting state, fire protection electric interlock switch on fire-fighting signal circuit Electromagnetic control coil.
4. a kind of coal mine local ventilation system as claimed in claim 3, which is characterized in that main power source input terminal is exchange 660V Input;Transformer is exported for 480V;Rectifier is 480V direct current outputs;Frequency converter is 380V exchange outputs;Control power supply transformation Device is 36V direct current outputs;IGBT is 240V exchange outputs;Isolating transformer is 220V exchange outputs;Fire-fighting signal power supply transformation Device is 24V direct current outputs.
A kind of 5. coal mine local ventilation system as claimed in claim 2, which is characterized in that the inverter input anode It is provided with the first diode, the output terminal connection inverter input of the first diode;It is inputted in the first diode and frequency converter The first safety box is also set up between end.
6. a kind of coal mine local ventilation system as claimed in claim 3, which is characterized in that the IGBT input terminals are in anode The first filter capacitor is provided between cathode;IGBT input terminals set the second safety box, the second diode in anode;Described Second filter capacitor is set between the positive electrode and negative electrode of isolating transformer output terminal;
The input terminal of the fire-fighting signal power transformer is connect with main power circuit, the input of fire-fighting signal power transformer End-coil carries centre cap, and centre cap is connect with isolating transformer.
7. a kind of coal mine local ventilation system as claimed in claim 2, which is characterized in that also set up in the control loop There is test switch, the test switch is simultaneously connected in main air blower electrical interlocks switch, standby fan electrical interlocks switch;Specifically For:Main air blower electrical interlocks is switched contacts with standby fan electrical interlocks switch, and wherein standby fan electrical interlocks switch is defeated Outlet is connected to the input terminal of main air blower electrical interlocks switch, and the input terminal of test switch is connected to standby fan electrical interlocks and opens The input terminal of pass, the output terminal of test switch are connected to the output terminal of main air blower electrical interlocks switch.
CN201721690205.2U 2017-12-07 2017-12-07 A kind of coal mine local ventilation system Active CN207598282U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110424999A (en) * 2019-08-27 2019-11-08 东南大学 A kind of construction ventilation of tunnel device
CN111425253A (en) * 2020-04-21 2020-07-17 余姚心智新能源科技有限公司 Exhaust power supply protection device for coal mine field

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110424999A (en) * 2019-08-27 2019-11-08 东南大学 A kind of construction ventilation of tunnel device
CN111425253A (en) * 2020-04-21 2020-07-17 余姚心智新能源科技有限公司 Exhaust power supply protection device for coal mine field
CN111425253B (en) * 2020-04-21 2020-12-04 江西省拓网电气有限公司 Exhaust power supply protection device for coal mine field

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