CN103591041A - Intelligent coal mine local ventilation system - Google Patents
Intelligent coal mine local ventilation system Download PDFInfo
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- CN103591041A CN103591041A CN201310623015.9A CN201310623015A CN103591041A CN 103591041 A CN103591041 A CN 103591041A CN 201310623015 A CN201310623015 A CN 201310623015A CN 103591041 A CN103591041 A CN 103591041A
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Abstract
The invention discloses an intelligent coal mine local ventilation system which comprises a mining flame-proof type two-circuit feeder switch, two passageway type anti-explosion frequency converters and two local ventilation machines. The mining flame-proof type two-circuit feeder switch is connected with an information collecting module under a coal mine, supplies power for the two anti-explosion frequency converters respectively and controls the two anti-explosion frequency converters to work. The two anti-explosion frequency converters are connected with the two local ventilation machines respectively, and air flow automatic switching devices are further arranged at air outlets of the two local ventilation machines. Under the control of the mining flame-proof type intelligent two-circuit feeder switch, rotation speed of a fan is automatically adjusted, air is supplied according to needs, gas is intelligently exhausted, energy is saved, consumption is reduced, disasters are prevented, and safety and reliability of the local ventilation system are improved.
Description
Technical field
The present invention relates to colliery local ventilation device, relate in particular to the intelligent local ventilation system in a kind of colliery.
Background technique
At present, traditional coal-mine local fan product can not frequency control of motor speed, and draft type " is cancelled all things together ", when getting working face changes, can not change the wind supply quantity of booster.When getting working face Gas Outburst, air quantity but can not increase, and easily causes security incident; When working surface digging amount reduces, cause again the surplus of air quantity, waste electric energy.Meanwhile, the switching of primary, spare ventilator needs manual operation, can not realize automatic control and unmanned.
Between primary, spare ventilator, switch and mostly adopt two independent airducts, or adopt at every Fans and pipeline connection place installation switching gate, this structure not only takes up room larger, input cost is high, and needing manual operation, efficiency is low, switching is slow, is unfavorable for the reliability of mine safety.
Summary of the invention
The object of this invention is to provide the intelligent local ventilation system in a kind of colliery, can automatically regulate ventilator rotating speed, realize air feed as required.
The present invention adopts following technical proposals: the intelligent local ventilation system in a kind of colliery, include flame-proof mine double loop feeding switch, two flow channel type explosion-proof frequency converters and two boosters, described flame-proof mine double loop feeding switch is connected with the information acquisition module under coal mine, described flame-proof mine double loop feeding switch powers to respectively two explosion-proof frequency converters, and control two explosion-proof frequency converters and carry out work, two explosion-proof frequency converters connect respectively two boosters, the exhaust outlet place of two described boosters is also provided with distinguished and admirable automatic switching control equipment.
Described double loop feeding switch includes flame-proof enclosure, and flame-proof enclosure comprises main chamber and wire connection cavity, is provided with core frame and double loop feeding switch circuit board in main chamber, and side, main chamber is provided with master switcher and time throw over switch, and wiring outlet is set on wire connection cavity, double loop feeding switch circuit board includes main power feed switch loop, inferior feeding switch loop and double-cricuit supply handover module, main power feed switch loop comprises master switcher, first signal Acquisition Circuit, the first central processing unit (CPU), the first power control circuit, the first external signal input circlult and the first executive circuit, master switcher is series in the three-phase loop of primary power supply and main load, described first signal Acquisition Circuit input end is serially connected with between master switcher and main load, the output terminal of first signal Acquisition Circuit connects the collection signal input end of the first central processing unit (CPU), the status information input end of the first central processing unit (CPU) connects the output terminal of the first external signal input circlult, the control output end of the first central processing unit (CPU) connects the first executive circuit, the action contact of the first executive circuit connects explosion-proof frequency converter, the first described power control circuit comprises main switch-on controlling module, main separating brake control module and main transformer die block, the power supply lead wire end of main transformer die block connects two-phase primary power supply, the power output end of main transformer die block connects the primary power supply input end of double-cricuit supply handover module, the first power output end of double-cricuit supply handover module connects main switch-on controlling module, and the second source output terminal of double-cricuit supply handover module connects main separating brake control module, described inferior feeding switch loop comprises time throw over switch, secondary signal Acquisition Circuit, the second central processing unit (CPU), the second external signal input circlult, the second executive circuit, second source control circuit, annexation is identical with main power feed switch loop, wherein second source control circuit comprises time switch-on controlling module, inferior separating brake control module and time voltage changing module, the power output end of inferior voltage changing module connects the secondary source input end of double-cricuit supply handover module, inferior switch-on controlling module connects the first power output end of double-cricuit supply handover module, inferior separating brake control module connects the second source output terminal of double-cricuit supply handover module, the first described central processing unit (CPU) is connected touch screen display with the second central processing unit (CPU) simultaneously.
Described first signal Acquisition Circuit comprises that main load zero-sequence current gathers mutual inductor, main load operation current acquisition mutual inductor group, main load residual voltage collection reactor and main load operation voltage synchrotrans, described main load zero-sequence current gathers mutual inductor and main load operation current acquisition mutual inductor group all adopts punching structure to be serially connected with in the three-phase loop of master switcher and main load, and main load zero-sequence current gathers mutual inductor and is connected the first central processing unit (CPU) with the output terminal of main load operation current acquisition mutual inductor group; The input end that described main load residual voltage gathers reactor and main load operation voltage synchrotrans is connected in the three-phase loop of master switcher and main load, and main load residual voltage gathers reactor and is connected the first central processing unit (CPU) with the output terminal of main load operation voltage synchrotrans; One end that described main load residual voltage gathers the primary air of reactor connects the reactor neutral point detection input end of the first central processing unit (CPU) by the auxiliary normally-closed contact of master switcher; First signal Acquisition Circuit also comprises main load frequency, current feedback circuit, the input end of main load frequency, current feedback circuit connects explosion-proof frequency converter, and the output terminal of main load frequency, current feedback circuit connects the three-phase simulation amount input end of the first central processing unit (CPU).
The main transformer die block of the first described power control circuit comprises the first transformer, and the input end of the primary air of the first transformer is power supply lead wire end, and secondary winding San road output terminal connects the primary power supply input end of double-cricuit supply handover module; The main switch-on controlling module of the first described power control circuit comprises the first bridge rectifier, the input end of the first bridge rectifier connects the first power output end of double-cricuit supply handover module, the electrode input end of the first bridge rectifier is in series with closing by hand button, and the output terminal of the first bridge rectifier connects master switcher closing coil; the main separating brake control module of the first described power control circuit comprises the second transformer, the primary air of the second transformer connects the second source output terminal of double-cricuit supply handover module, the output terminal of the first secondary winding of the second transformer connects respectively main load zero-sequence current and gathers mutual inductor, main load operation current acquisition mutual inductor group, main load residual voltage gathers reactor and main load operation voltage synchrotrans, the output terminal of the second subprime coil of the second transformer connects the input end of the second bridge rectifier and the 3rd bridge rectifier simultaneously by rectification module, the electrode input end Series Frequency Conversion slew relay normally opened contact of the second bridge rectifier, the output terminal of the second bridge rectifier connects master switcher decompression switching winding, electrode input end series connection manual brake separating button and the master switcher normally opened contact of the 3rd bridge rectifier, and manual brake separating button is parallel with fault feedback relay normally open contact, the output terminal of the 3rd bridge rectifier connects master switcher shunt opening switching winding.
The first described external signal input circlult comprises that a plurality of load operations control the normally opened contact of hand push buttons and master switcher combined floodgate feedback switch, frequency conversion power transfer relay, described a plurality of load operations are controlled hand push button and are comprised variable frequency starting button, frequency conversion stop button, frequency conversion raising frequency button, frequency conversion frequency reducing button, frequency conversion emergency stop button, the normally opened contact that master switcher combined floodgate feedback switch is throw over switch, the normally opened contact of frequency conversion power transfer relay is the normally opened contact of frequency converter failure output terminal relay.
The first described executive circuit comprises that variable frequency starting control coil, frequency conversion stop control coil, anxious control coil, system failure control coil and power electric locking Fault Control coil and the voltage transducer of stopping of frequency conversion, the signal of the signal output part outputting standard 4～20mA of voltage transducer is to the frequency variation signal input end of frequency variator, as the given input of frequency of frequency variator.
Described explosion-proof frequency converter comprises air duct, air duct inside is provided with rectangle explosion-proof tank, copper radiator, forceful electric power input box, forceful electric power output wiring box, control terminal box, terminal box bearing and frequency variator core, forceful electric power input box, forceful electric power output wiring box and control terminal box are all fixedly installed on terminal box bearing, terminal box bearing one end is connected with double loop feeding switch through air duct barrel, the other end is connected with rectangle explosion-proof tank, rectangle explosion-proof tank is fixed in air duct cylinder by unsettled, copper radiator is installed on rectangle explosion-proof tank one side, it is inner that frequency variator core is fixedly installed in rectangle explosion-proof tank, described air inlet channel below air duct is provided with fixed feet.
The air duct of described explosion-proof frequency converter communicates with the air duct of controlled booster, and diameter is identical; Two explosion-proof frequency converters are installed by support and two booster one.
Described distinguished and admirable automatic switching control equipment has a U-shaped air duct, the anterior two-port of U-shaped air duct is that air intake position is connected with the ajutage of two boosters respectively, the U-bend place of U-shaped air duct bottom has exhaust outlet, this exhaust outlet is connected with exhaust duct, prong place at exhaust outlet is hinged with movable doorboard, and the both sides of exhaust outlet are respectively equipped with the doorframe coordinating with movable doorboard.
On described doorframe, be pasted with elastic packing packing ring; Described doorframe is provided with magnetic suction block, and the magnetic suction block quantity on the doorframe of upside is more than 2, and the quantity of the magnetic suction block on the doorframe of downside is at least 1; Described movable doorboard adopts epoxy resin bonded fiber, and door-plate both sides are pasted with closed glue pad, and rubber cushion outside is provided with compression steel plate.
The present invention, by changing coal-mine local fan control mode, under the control of flame-proof mine intelligence double loop feeding switch, regulates ventilator rotating speed automatically, realize air feed as required, the functions such as Intelligent drainage gas, reach energy-saving and cost-reducing, prevention disaster, the safety reliability of raising local ventilation system.
Concrete beneficial effect is as follows:
The present invention exports electric energy by the double-power source in main power feed switch loop and time feeding switch loop by double-cricuit supply handover module, as long as guarantee to have a loop energising, can make power control circuit normal operation, power control circuit mainly completes opening/closing a floodgate of throw over switch by switch-on controlling module and separating brake control module; Meanwhile, signal acquisition circuit gathers electric current, the voltage signal of load end, is convenient to Real-Time Monitoring load end state; Further, by external signal input circlult, control command information conveyance, to central processing unit (CPU), then is sent to information by control output end to executive circuit by central processing unit (CPU), in executive circuit the control coil of corresponding external signal input circlult obtain electric, the running state of control load then.
The present invention is connected explosion-proof frequency converter with local fan, utilize the distinguished and admirable cooling problem that has solved frequency variator of portable blower, realize air-cooled, the centralized control fast of frequency variator, reduced external refrigeration equipment, not only saved energy consumption, and greatly reducing equipment cost, two equipment connections also facilitate concentrated observation, monitoring and management together simultaneously; Integral installation, on support, is saved installing space.
The present invention, by distinguished and admirable automatic switching control equipment, can reduce on-the-spot airduct quantity, only adopts single airduct, under the distinguished and admirable pressure of ventilator self, can realize two automatic switchovers that ventilator is distinguished and admirable, and simple in structure, and sealing is reliable.And need not configure in addition the devices such as gate, and both improved efficiency, saved again cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the circuit theory diagrams of flame-proof mine of the present invention double loop feeding switch;
Fig. 3 is the structural representation of flow channel type explosion-proof frequency converter;
Fig. 4 is the internal structure schematic diagram of flow channel type explosion-proof frequency converter;
Fig. 5 is the structural representation of distinguished and admirable automatic switching control equipment.
Embodiment
As shown in Figure 1, the present invention includes flame-proof mine double loop feeding switch 1, two flow channel type explosion-proof frequency converters 3 and two boosters 2, described flame-proof mine double loop feeding switch 1 is connected with the information acquisition module under coal mine, described flame-proof mine double loop feeding switch 1 powers to respectively two explosion-proof frequency converters 3, and control respectively two explosion-proof frequency converters 3 and carry out work, two explosion-proof frequency converters 3 connect respectively two boosters 2, the exhaust outlet place of two described boosters 2 is also provided with distinguished and admirable automatic switching control equipment 5.
Two boosters 2 are primary booster and standby booster, two flow channel type rectangle explosion-proof frequency converters are controlled respectively two boosters, the signal such as gas density, gas concentration lwevel, wind speed, temperature that information gathering monitoring station under coal mine obtains down-hole different parts from coal mine downhole safety supervisory system flows to double loop feeding switch (with communication between the information gathering monitoring station ethernet communication module (LM3403) and coal mine, X is optical fiber interface).Double loop feeding switch is adjusted the output current frequency of explosion-proof frequency converter according to the parameter logical relation of setting, portable blower motor speed is adjusted, regulate fan delivery, meet mine ventilation demand and energy-saving run, there is the function of air feed as required, solve present mine blast volume non-adjustable, " cancelling all things together " phenomenon.Analyzing logic control condition is formulated the increase air quantity high speed gas-removing while having gas lower than alarming value, the reduce air quantity of gas during higher than alarming value slows down drawing-off gas speed scheme, whole gas-removing process safety is efficient, do not need the artificial mode of stifled plank or bundle air duct that adopts to carry out, improve drawing-off gas speed, improve personal security.
Flame-proof mine double loop feeding switch 1 has touch screen display 12, manual control button 13, can realize LCD screen display on the spot and show, controls on the spot and remote control function; Can realize acoustooptic alarm and remind power-off; Also there is lock between air and electricity, gas electric shutting, carbon dioxide electric locking, temperature electric locking, the functions such as high efficiency smart gas-removing, and can monitor and fault diagnosis system self, can realize the function of a key start, automatic switchover blower fan, automatic parallel operation.When user configures upper-position unit unit, the operation of remote controlled many cover intelligent blowers.The present invention realizes communication by the communication interface (RS232) of two low voltage electric network intelligent protection modules with touch screen display 12, reads electric current, frequency, fault, motor steering, the far and near journey signal of frequency variator.
Described in flame-proof mine double loop feeding switch 1 is specific as follows: include flame-proof enclosure, flame-proof enclosure comprises main chamber and wire connection cavity, in main chamber, be provided with core frame and double loop feeding switch circuit board, side, main chamber is provided with double loop throw over switch, and many wiring outlets are set on wire connection cavity; Double loop feeding switch circuit board includes main power feed switch loop, inferior feeding switch loop and double-cricuit supply handover module, main power feed switch loop comprises master switcher QS2, first signal Acquisition Circuit, the first central processing unit (CPU) U1, the first power control circuit, the first external signal input circlult, the first executive circuit, and wherein master switcher QS2 is series in the three-phase loop of primary power supply and main load; Main resistance-capacitance absorption device ZR2 is connected between master switcher QS2 and load 2# frequency variator.Same time resistance-capacitance absorption device ZR1 is connected between time throw over switch QS1 and load 1# frequency variator.In Fig. 1, tenminal block L1, L2, L3 connect secondary source (1# power supply), and L31, L32, L32 connect primary power supply (2# power supply), and tenminal block L21, L22, L23 connect 1# frequency variator, and tenminal block L41, L42, L43 connect 2# frequency variator.Described inferior feeding switch loop comprises time throw over switch, secondary signal Acquisition Circuit, the second central processing unit (CPU) U2, the second external signal input circlult, the second executive circuit, second source control circuit, the component in inferior feeding switch loop and annexation are consistent with main power feed switch loop, different is in second source control circuit, there is no double-cricuit supply handover module, share a double-cricuit supply handover module: second source control circuit comprises time switch-on controlling module, inferior separating brake control module and time voltage changing module, the power output end of inferior voltage changing module connects the secondary source input end of double-cricuit supply handover module, inferior switch-on controlling module connects the first power output end of double-cricuit supply handover module, inferior separating brake control module connects the second source output terminal of double-cricuit supply handover module.Wherein, the first central processing unit (CPU), the second central processing unit (CPU) all adopt low voltage electric network intelligent protection module, model LM3108K1.
With main power feed switch loop, describe below:
Described first signal Acquisition Circuit comprises that main load zero-sequence current gathers mutual inductor TA8, main load operation current acquisition mutual inductor group TA4, TA5, TA6, main load residual voltage gathers reactor T11 and main load operation voltage synchrotrans T5, described main load zero-sequence current gathers mutual inductor TA8 and main load operation current acquisition mutual inductor group TA4, TA5, TA6 all adopts punching structure to be serially connected with in the three-phase loop of master switcher QS2 and main load 2# frequency variator, main load zero-sequence current gathers mutual inductor TA8 and main load operation current acquisition mutual inductor group TA4, TA5, the output terminal of TA6 connects respectively the pin I0 of the first central processing unit (CPU) U1, COM and IA, IB, IC, the input end that described main load residual voltage gathers reactor T11 and main load operation voltage synchrotrans T5 is parallel in the three-phase loop of master switcher QS2 and main load 2# frequency variator, and the output terminal of main load residual voltage collection reactor T11 and main load operation voltage synchrotrans T5 is connected respectively pin U0, the COM of the first central processing unit (CPU) and UA, UB, UC.One end that described main load residual voltage gathers the primary air of reactor T11 connects the reactor neutral point detection input end RL that is connected the first central processing unit (CPU) U1 by the auxiliary normally-closed contact QS2 of master switcher with resistance R 2, whether for detection of master switcher QS2, close a floodgate, capacitor C 3, C4 are filter capacitor.The input end of load frequency, current feedback circuit connects 2# frequency variator, the output terminal of load frequency, current feedback circuit connects the three-phase simulation amount input end (AL1+, AL2+, AL-) of the first central processing unit (CPU) U1, resistance R 5 is connected between AL1+ and AL-, and resistance R 6 is connected between AL2+ and AL-.
The status information input end of the first described central processing unit (CPU) U1 connects the output terminal of the first external signal input circlult, the first external signal input circlult comprises that a plurality of load operations control the normally opened contact of the normally opened contact KA6(frequency converter failure output terminal relay of hand push buttons and master switcher combined floodgate feedback switch QS2, frequency conversion power transfer relay), described a plurality of load operations are controlled hand push buttons 4 and are comprised variable frequency starting button SB10, frequency conversion stop button SB11, frequency conversion raising frequency button SB12, frequency conversion frequency reducing button SB13, frequency conversion emergency stop button SB14; The control output end of the first central processing unit (CPU) U1 connects the first executive circuit, and the first executive circuit comprises that variable frequency starting control coil KA8, frequency conversion stop control coil KA9, frequency conversion and suddenly stop control coil KA10, system failure control coil KA11 and power electric locking Fault Control coil KA12, voltage transducer.The analog output unit of the first central processing unit (CPU) U1 is the given input of frequency as 2# frequency variator by voltage transducer P2 outputting standard 4～20mA signal.
The first described power control circuit comprises main switch-on controlling module, main separating brake control module and main transformer die block, main transformer die block comprises the first transformer T2, the input end of the primary air of the first transformer T2 is power supply lead wire end, power supply lead wire end connects the two-phase of primary power supply, and secondary winding San road output terminal connects the primary power supply input end of double-cricuit supply handover module.The first power control circuit is come electric energy by the primary air collection of the first transformer T2, secondary winding through the first transformer T2 carries out transformation processing again, export respectively 220V/250w, 127V/250w voltage, flow to double-cricuit supply handover module, as the main feeder ear of double-cricuit supply handover module; Meanwhile, also can be to double-cricuit supply handover module transmission of electric energy, as the inferior feeder ear of double-cricuit supply handover module in inferior feeding switch loop; Wherein 127V power supply after double-cricuit supply handover module as vacuum circuit breaker closing operation power supply; Because 220V exports the second transformer T3, the output of bridge rectifier module DC48V, DC10V to through double-cricuit supply handover module, wherein DC48V is as two loop vacuum circuit breaker sub-switching operation power supplys, and DC10V is as the control power supply of components and parts in system core central processing unit (CPU) and signal acquisition circuit.Double-cricuit supply handover module is existing mature technology, is equivalent to two power supplys to introduce, then by an outlet output, does not repeat them here.
The main switch-on controlling module of the first power control circuit comprises the first bridge rectifier D1, the input end of the first bridge rectifier D1 connects the first power output end of double-cricuit supply handover module, the electrode input end of the first bridge rectifier D1 is in series with closing by hand button SB8, the output terminal of the first bridge rectifier D1 connects master switcher closing coil J2, by pressing manually closing by hand button SB8, hand push button SB8 is closed, master switcher closing coil J2 obtain electric, master switcher QS2 feed motion; The main separating brake control module of the first power control circuit comprises the second transformer T3, the primary air of the second transformer T3 connects the second source output terminal of double-cricuit supply handover module, the output terminal of the first secondary winding of the second transformer T3 connects respectively main load zero-sequence current and gathers mutual inductor TA8, main load operation current acquisition mutual inductor group TA4, TA5, TA6, main load residual voltage collection reactor T11 and main load operation voltage synchrotrans T5, for it provides electric energy; The output terminal of the second subprime coil of the second transformer T3 connects the input end of the second bridge rectifier D2 and the 3rd bridge rectifier D3 simultaneously by rectification module, the normally opened contact KA9 of the electrode input end Series Frequency Conversion slew relay of the second bridge rectifier D2, frequency conversion in the first executive circuit stops control coil KA9 and obtains when electric, this frequency conversion slew relay normally opened contact KA9 auto-closing, the master switcher decompression switching winding J5 that the second bridge rectifier D2 output terminal connects obtains electric, thereby makes the action of master switcher QS2 separating brake; Electrode input end series connection manual brake separating button SB9 and the master switcher normally opened contact QS2 of the 3rd bridge rectifier D3, and manual brake separating button SB9 is parallel with the normally opened contact KA7 of fault feedback relay, the coil KA7 connecting valve power supply of fault feedback relay, coil KA7 also connects with the normally opened contact KA6 of the power transfer relay of 2# frequency variator.When 2# frequency converter failure, power transfer relay obtains the electric trouble signal that sends, normally opened contact KA6 is closed, fault feedback relay coil KA7 obtains electric, the normally opened contact KA7 of fault feedback relay is closed, master switcher shunt opening switching winding J6 obtains electric, thereby makes the action of master switcher QS2 separating brake.
As shown in Figure 2; when working, the present invention adopts two completely independently loops; be main power feed switch loop, inferior feeding switch loop; utilizing master switcher QS2 and time throw over switch QS1(is the normally opened contact of vacuum circuit breaker) control respectively the break-make of two frequency conversion integrated portable blowers, be aided with the switching overvoltage protective function that main resistance-capacitance absorption device ZR1, ZR2 realize vacuum circuit breaker.
The first central processing unit (CPU) U1 (LM3108K1) gathers load inverter running current, main load zero-sequence current collection mutual inductor TA8 collection load inverter zero-sequence current by main load operation current acquisition mutual inductor group T4, T5, T6, as the current protection benchmark of portable blower and frequency variator; The first central processing unit (CPU) U1 gathers load voltage signal, main load residual voltage collection reactor T11 collection load residual voltage signal by main load operation voltage synchrotrans T5, as the voltage protection benchmark of portable blower and frequency variator.
The integrated logic element of the first central processing unit (CPU) U1 is inputted by software programming and configuration monitoring information gathering switching value, master switcher QS2 by vacuum circuit breaker realizes the feedback of status of 2# vacuum circuit breaker and inputs, by hand push button SB10, SB11, SB12, SB13, SB14 realize 2# frequency variator starting, stop, raising frequency, frequency reducing, anxious stopping transportation enter; Control logic unit in the first central processing unit (CPU) U1 is exported by software programming and configuration control switch amount, respectively by KA8, KA9, KA10, KA11, KA12 realize the starting of 2# frequency variator, stop, suddenly stopping, warning, lock-in control, thereby realize the running of controlling blower fan.When needs 2# frequency variator starts, manually press the variable frequency starting button SB10 in the first external signal input circlult, low voltage electric network intelligent protection module receives after variable frequency starting order, through inner logical operation, to the variable frequency starting control coil KA8 power transmission in the first executive circuit, then the normally opened contact of the control coil KA8 of 2# frequency variator end is closed, and 2# frequency variator obtains electric work; When needs 2# frequency variator stops, there are two kinds of situations, one: artificially need 2# frequency variator to stop, manually by down coversion stop button SB11, after the first central processing unit (CPU) U1 receives frequency conversion and ceases and desist order, through inner logical operation, the frequency conversion in the first executive circuit stops control coil KA9 power transmission, then the normally opened contact of the control coil KA9 of 2# frequency variator end is closed, and 2# frequency variator quits work; Two, when the first central processing unit (CPU) U1 inside collects the trouble signal of frequency variator, sending signal makes frequency conversion stop control coil KA9 to obtain electric, frequency conversion slew relay normally opened contact KA9 auto-closing in power control circuit, master switcher decompression switching winding J5 obtains electric, master switcher QS2 separating brake, disconnects 2# converter power supply; When needs frequency conversion raising frequency or frequency reducing, the first central processing unit (CPU) U1 judgement user ascending, descending intention under the existing frequency of moving, by voltage transducer P2, regulate output terminal output 4～20mA signal of analog amount, by the frequency lifting of this SC sigmal control frequency variator; When 2# frequency variator breaks down, the power transfer relay coil of 2# frequency variator end obtains electric, frequency conversion power transfer relay normally opened contact KA6 auto-closing in the first external signal input circlult, the first central processing unit (CPU) sends signal makes the system failure control coil KA10 in the first executive circuit obtain electric, system failure warning circuit is sounded the alarm, and cuts off the power supply of frequency variator simultaneously.Electric locking Fault Control coil KA12 has realized lock between air and electricity, gas electric shutting, carbon dioxide electric locking, temperature electric locking.
The working principle in inferior feeding switch loop is the same with the working principle in main power feed switch loop, does not repeat them here.
Described in explosion-proof frequency converter is specific as follows: as shown in Figure 3 and Figure 4, the integrated flow channel type rectangle of coal-mine local fan explosion-proof frequency converter, comprise air duct 31, rectangle explosion-proof tank 32, copper radiator 33, forceful electric power input box 34, forceful electric power output wiring box 35, control terminal box 36, terminal box bearing 37 and frequency variator core 38, forceful electric power input box 4, forceful electric power output wiring box 35 and control terminal box 36 are all fixedly installed on terminal box bearing 37, terminal box bearing 37 one end are through air duct 31 barrels and external power equipment connection, the other end is connected with rectangle explosion-proof tank 32, rectangle explosion-proof tank 32 is fixed in 31 of air ducts by unsettled, copper radiator 33 is installed on rectangle explosion-proof tank 32 1 sides, frequency variator core 38 is fixedly installed in rectangle explosion-proof tank 32 inside, it is characterized in that: except air duct 31, described all components and parts are all arranged on air duct 31 inside, air duct 1 below is provided with fixed feet 39.
The present invention is directly connected with down-hole portable blower, the diameter of air duct 31 is used the wind outlet barrel diameter of portable blower identical with corresponding connection, forceful electric power input box 34, forceful electric power output wiring box 35 and control terminal box 36 co-controlling circuit of the present invention open and close, when work, what portable blower was pressed into is distinguished and admirable under the constraint of air duct 31, directly from explosion-proof tank 32 and copper radiator 3 surfaces, flow through, by the heat exchange between distinguished and admirable and explosion-proof tank 32, copper radiator 33, realize the cooling fast of frequency variator.
Described in distinguished and admirable automatic switching control equipment is specific as follows: referring to Fig. 5, the distinguished and admirable automatic switching control equipment of mine fan of the present invention, this device has a U-shaped air duct 51, the anterior two-port of air duct 51 is that air intake position is connected with the ajutage of primary blower fan and standby fan respectively, U-bend place, air duct bottom has exhaust outlet 56, this exhaust outlet 56 is connected with exhaust duct, prong place at exhaust outlet 56 is connected with movable doorboard 54 by hinge 3, in order to strengthen the sealing at shutoff position, in the both sides of exhaust outlet 56, be respectively equipped with the doorframe 52 coordinating with movable doorboard 4, magnetic suction block 55 is housed on doorframe, wherein, the quantity of the magnetic suction block 5 on the doorframe of upside is more than 2, the quantity of the magnetic suction block 55 on the doorframe of downside is at least 1.When U-shaped air duct 1, erect while installing, the magnetic suction block 55 being positioned on the doorframe of upside preferably arranges 3, and the gravity while upwards overturning to overcome movable doorboard 54, allows door-plate keep steady state in fan operation process.While considering movable doorboard 54 upset downwards, by himself gravity, can realize its upset fast automatically, 1 magnetic suction block is set on the doorframe of downside, mainly play auxiliary seal effect, also can form and make a concerted effort with movable doorboard 54 deadweights, allow movable doorboard 54 keep state of rest in fan operation process.Described movable doorboard 54 adopts epoxy resin bonded fiber, can weight reduction, in movable doorboard 4 both sides, be pasted with seal rubber pad, seal rubber pad outside is provided with and compresses steel plate (not shown), this compression steel plate can not only prevent that seal rubber pad from coming off, and can also adsorb magnetic suction block 55.After movable doorboard 54 use hinges 3 are fixing, can between two doorframes 52, freely rotate, when movable doorboard 54 contacts with any side door frame 2, can cut off being communicated with of this distinguished and admirable and exhaust duct.Upset by movable doorboard 54 can replace by both sides air intake pipe shutoff, correspondingly that the air intake pipe of opposite side is unimpeded.Rigid impact during for fear of upset between movable doorboard 54 and doorframe 52, and can strengthen the sealability between movable doorboard 54 and doorframe 52, and stablize its sealing state, on doorframe 52, be stained with elastic packing packing ring.This device in use, when primary ventilator breaks down when out of service, by control mechanism, control and can start standby fan, the movable doorboard 54 of shutoff being blown to the mouth of pipe at it by the airflow of its generation blows open voluntarily, and make movable doorboard 54 under the effect of primary ventilator air blowing opening magnetic suction block 55, movable doorboard 54 is fitted in rapidly on the doorframe 52 of its air blowing opening, air-flow by the supply air duct that connects standby ventilator through exhaust duct air feed.Identical with above-mentioned switching to the handoff procedure of primary ventilator by standby ventilator.Thus, without manual operation, can realize primary, spare two automatic switchovers that ventilator is distinguished and admirable, and very quick.This apparatus structure is simple, and sealing is good, cheap for manufacturing cost.
Claims (10)
1. the intelligent local ventilation system in a colliery, it is characterized in that: include flame-proof mine double loop feeding switch, two flow channel type explosion-proof frequency converters and two boosters, described flame-proof mine double loop feeding switch is connected with the information acquisition module under coal mine, described flame-proof mine double loop feeding switch powers to respectively two explosion-proof frequency converters, and control two explosion-proof frequency converters and carry out work, two explosion-proof frequency converters connect respectively two boosters, the exhaust outlet place of two described boosters is also provided with distinguished and admirable automatic switching control equipment.
2. the intelligent local ventilation system in colliery according to claim 1, it is characterized in that: described double loop feeding switch includes flame-proof enclosure, flame-proof enclosure comprises main chamber and wire connection cavity, in main chamber, be provided with core frame and double loop feeding switch circuit board, side, main chamber is provided with master switcher and time throw over switch, and wiring outlet is set on wire connection cavity, double loop feeding switch circuit board includes main power feed switch loop, inferior feeding switch loop and double-cricuit supply handover module, main power feed switch loop comprises master switcher, first signal Acquisition Circuit, the first central processing unit (CPU), the first power control circuit, the first external signal input circlult and the first executive circuit, master switcher is series in the three-phase loop of primary power supply and main load, described first signal Acquisition Circuit input end is serially connected with between master switcher and main load, the output terminal of first signal Acquisition Circuit connects the collection signal input end of the first central processing unit (CPU), the status information input end of the first central processing unit (CPU) connects the output terminal of the first external signal input circlult, the control output end of the first central processing unit (CPU) connects the first executive circuit, the action contact of the first executive circuit connects explosion-proof frequency converter, the first described power control circuit comprises main switch-on controlling module, main separating brake control module and main transformer die block, the power supply lead wire end of main transformer die block connects two-phase primary power supply, the power output end of main transformer die block connects the primary power supply input end of double-cricuit supply handover module, the first power output end of double-cricuit supply handover module connects main switch-on controlling module, and the second source output terminal of double-cricuit supply handover module connects main separating brake control module, described inferior feeding switch loop comprises time throw over switch, secondary signal Acquisition Circuit, the second central processing unit (CPU), the second external signal input circlult, the second executive circuit, second source control circuit, annexation is identical with main power feed switch loop, wherein second source control circuit comprises time switch-on controlling module, inferior separating brake control module and time voltage changing module, the power output end of inferior voltage changing module connects the secondary source input end of double-cricuit supply handover module, inferior switch-on controlling module connects the first power output end of double-cricuit supply handover module, inferior separating brake control module connects the second source output terminal of double-cricuit supply handover module, the first described central processing unit (CPU) is connected touch screen display with the second central processing unit (CPU) simultaneously.
3. the intelligent local ventilation system in colliery according to claim 2, it is characterized in that: described first signal Acquisition Circuit comprises that main load zero-sequence current gathers mutual inductor, main load operation current acquisition mutual inductor group, main load residual voltage gathers reactor and main load operation voltage synchrotrans, described main load zero-sequence current gathers mutual inductor and main load operation current acquisition mutual inductor group all adopts punching structure to be serially connected with in the three-phase loop of master switcher and main load, main load zero-sequence current gathers mutual inductor and is connected the first central processing unit (CPU) with the output terminal of main load operation current acquisition mutual inductor group, the input end that described main load residual voltage gathers reactor and main load operation voltage synchrotrans is connected in the three-phase loop of master switcher and main load, and main load residual voltage gathers reactor and is connected the first central processing unit (CPU) with the output terminal of main load operation voltage synchrotrans, one end that described main load residual voltage gathers the primary air of reactor connects the reactor neutral point detection input end of the first central processing unit (CPU) by the auxiliary normally-closed contact of master switcher, first signal Acquisition Circuit also comprises main load frequency, current feedback circuit, the input end of main load frequency, current feedback circuit connects explosion-proof frequency converter, and the output terminal of main load frequency, current feedback circuit connects the three-phase simulation amount input end of the first central processing unit (CPU).
4. the intelligent local ventilation system in colliery according to claim 3, it is characterized in that: the main transformer die block of the first described power control circuit comprises the first transformer, the input end of the primary air of the first transformer is power supply lead wire end, and secondary winding San road output terminal connects the primary power supply input end of double-cricuit supply handover module; The main switch-on controlling module of the first described power control circuit comprises the first bridge rectifier, the input end of the first bridge rectifier connects the first power output end of double-cricuit supply handover module, the electrode input end of the first bridge rectifier is in series with closing by hand button, and the output terminal of the first bridge rectifier connects master switcher closing coil; the main separating brake control module of the first described power control circuit comprises the second transformer, the primary air of the second transformer connects the second source output terminal of double-cricuit supply handover module, the output terminal of the first secondary winding of the second transformer connects respectively main load zero-sequence current and gathers mutual inductor, main load operation current acquisition mutual inductor group, main load residual voltage gathers reactor and main load operation voltage synchrotrans, the output terminal of the second subprime coil of the second transformer connects the input end of the second bridge rectifier and the 3rd bridge rectifier simultaneously by rectification module, the electrode input end Series Frequency Conversion slew relay normally opened contact of the second bridge rectifier, the output terminal of the second bridge rectifier connects master switcher decompression switching winding, electrode input end series connection manual brake separating button and the master switcher normally opened contact of the 3rd bridge rectifier, and manual brake separating button is parallel with fault feedback relay normally open contact, the output terminal of the 3rd bridge rectifier connects master switcher shunt opening switching winding.
5. the intelligent local ventilation system in colliery according to claim 4, it is characterized in that: the first described external signal input circlult comprises a plurality of load operations control hand push buttons and master switcher combined floodgate feedback switch, the normally opened contact of frequency conversion power transfer relay, described a plurality of load operations are controlled hand push button and are comprised variable frequency starting button, frequency conversion stop button, frequency conversion raising frequency button, frequency conversion frequency reducing button, frequency conversion emergency stop button, the normally opened contact that master switcher combined floodgate feedback switch is throw over switch, the normally opened contact of frequency conversion power transfer relay is the normally opened contact of frequency converter failure output terminal relay.
6. the intelligent local ventilation system in colliery according to claim 5, it is characterized in that: the first described executive circuit comprises that variable frequency starting control coil, frequency conversion stop control coil, anxious control coil, system failure control coil and power electric locking Fault Control coil and the voltage transducer of stopping of frequency conversion, the signal of the signal output part outputting standard 4～20mA of voltage transducer is to the frequency variation signal input end of frequency variator, as the given input of frequency of frequency variator.
7. the intelligent local ventilation system in colliery according to claim 1, it is characterized in that: described explosion-proof frequency converter comprises air duct, air duct inside is provided with rectangle explosion-proof tank, copper radiator, forceful electric power input box, forceful electric power output wiring box, control terminal box, terminal box bearing and frequency variator core, forceful electric power input box, forceful electric power output wiring box and control terminal box are all fixedly installed on terminal box bearing, terminal box bearing one end is connected with double loop feeding switch through air duct barrel, the other end is connected with rectangle explosion-proof tank, rectangle explosion-proof tank is fixed in air duct cylinder by unsettled, copper radiator is installed on rectangle explosion-proof tank one side, it is inner that frequency variator core is fixedly installed in rectangle explosion-proof tank, described air inlet channel below air duct is provided with fixed feet.
8. the intelligent local ventilation system in colliery according to claim 6, is characterized in that: the air duct of described explosion-proof frequency converter communicates with the air duct of controlled booster, and diameter is identical; Two explosion-proof frequency converters are installed by support and two booster one.
9. the intelligent local ventilation system in colliery according to claim 1, it is characterized in that: described distinguished and admirable automatic switching control equipment has a U-shaped air duct, the anterior two-port of U-shaped air duct is that air intake position is connected with the ajutage of two boosters respectively, the U-bend place of U-shaped air duct bottom has exhaust outlet, this exhaust outlet is connected with exhaust duct, prong place at exhaust outlet is hinged with movable doorboard, and the both sides of exhaust outlet are respectively equipped with the doorframe coordinating with movable doorboard.
10. the distinguished and admirable automatic switching control equipment of mine fan according to claim 8, is characterized in that: on described doorframe, be pasted with elastic packing packing ring; Described doorframe is provided with magnetic suction block, and the magnetic suction block quantity on the doorframe of upside is more than 2, and the quantity of the magnetic suction block on the doorframe of downside is at least 1; Described movable doorboard adopts epoxy resin bonded fiber, and door-plate both sides are pasted with closed glue pad, and rubber cushion outside is provided with compression steel plate.
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| CN103939376A (en) * | 2014-04-28 | 2014-07-23 | 王敏 | Intelligent draught fan centralized-control box for power grid |
| CN104358698A (en) * | 2014-10-22 | 2015-02-18 | 山西省安瑞风机电气有限公司 | Brake device for remotely controlling axial flow fan |
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| CN105846723A (en) * | 2016-04-29 | 2016-08-10 | 山西际安电气有限公司 | Mine explosive-proof intrinsically safe dual-circuit vacuum electromagnetic starter |
| CN110380380A (en) * | 2019-07-24 | 2019-10-25 | 河北宝凯电气股份有限公司 | A kind of intelligent load protection system of breaker |
| CN112013698A (en) * | 2020-09-04 | 2020-12-01 | 河北工程大学 | Air supply heating equipment based on coal mine waste heat of airing exhaust |
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| CN112013698B (en) * | 2020-09-04 | 2021-09-21 | 河北工程大学 | Air supply heating equipment based on coal mine waste heat of airing exhaust |
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Address after: 473008 Nanyang City, Henan Province North Road, No. 22 Patentee after: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP CO., LTD. Address before: 473008 Nanyang City, Henan Province North Road, No. 22 Patentee before: Nanyang Explosion Protection Group Co., Ltd. |
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