CN103591041B - Intelligent coal mine local ventilation system - Google Patents
Intelligent coal mine local ventilation system Download PDFInfo
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- CN103591041B CN103591041B CN201310623015.9A CN201310623015A CN103591041B CN 103591041 B CN103591041 B CN 103591041B CN 201310623015 A CN201310623015 A CN 201310623015A CN 103591041 B CN103591041 B CN 103591041B
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Abstract
The present invention discloses a kind of intelligent coal mine local ventilation system, include flame-proof type double-loop feeder switch for mine, two flow channel type explosion-proof frequency converters and two auxiliary fans, the information acquisition model calling of described flame-proof type double-loop feeder switch for mine and underground coal mine, described flame-proof type double-loop feeder switch for mine powers to respectively two explosion-proof frequency converters, and control two explosion-proof frequency converters respectively and carry out work, two explosion-proof frequency converters connect two auxiliary fans respectively, the air port place that goes out of two described auxiliary fans is also provided with distinguished and admirable automatic shifter. the present invention, under the control of flame-proof mine intelligence double-loop feeder switch for mine, regulates ventilator rotating speed, it is achieved as required for wind, the functions such as Intelligent drainage gas, reach energy-saving and cost-reducing automatically, prevention disaster, it is to increase the safe reliability of local ventilation system.
Description
Technical field
The present invention relates to colliery local ventilation device, particularly relate to a kind of intelligent coal mine local ventilation system.
Background technology
At present, tradition coal-mine local fan product can not speed control by frequency variation, draft type " is cancelled all things together ", when getting working face changes, can not change the wind supply quantity of auxiliary fan. When getting working face gas is outstanding, air quantity but can not increase, it is easy to causes security incident; When working face 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 control automatically with unmanned on duty.
Switching between primary, spare ventilator and mostly adopt two independent airducts, or adopt to install in every typhoon machine and pipeline connection place and switch gate, it is bigger that this kind of structure not only takies space, input cost height, and needing manual operation, efficiency is low, switching is slow, is unfavorable for the reliability of mine safety.
Summary of the invention
It is an object of the invention to provide a kind of intelligent coal mine local ventilation system, it is possible to automatically regulate ventilator rotating speed, it is achieved as required for wind.
The present invention adopts following technical proposals: a kind of intelligent coal mine local ventilation system, include flame-proof type double-loop feeder switch for mine, two flow channel type explosion-proof frequency converters and two auxiliary fans, the information acquisition model calling of described flame-proof type double-loop feeder switch for mine and underground coal mine, described flame-proof type double-loop feeder switch for mine 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 two auxiliary fans respectively, the air port place that goes out of two described auxiliary fans is also provided with distinguished and admirable automatic shifter.
Described double-loop feeder switch for mine includes flameproof enclosure, and flameproof enclosure comprises main chamber and wire connection cavity, is provided with core frame and double-loop feeder switch for mine circuit card in main chamber, and side, main chamber is provided with main transfer lever and time transfer lever, and wire connection cavity arranges wiring outlet, double-loop feeder switch for mine circuit card includes main power feed switch loop, secondary feeding switch loop and double-cricuit supply handover module, main power feed switch loop comprises main transfer lever, first signals collecting circuit, first central processing unit, first Energy control circuit, first outside signal input circuit and the first execution circuit, main transfer lever is series in the three-phase loop of primary source and main load, the first described signals collecting circuit input end is serially connected with between main transfer lever and main load, the output terminal of the first signals collecting circuit connects the acquired signal input terminus of the first central processing unit, the status information input terminus of the first central processing unit connects the output terminal of the first outside signal input circuit, the control output end of the first central processing unit connects the first execution circuit, the action contact of the first execution circuit connects explosion-proof frequency converter, the first described Energy control circuit comprises main switch-on controlling module, main point lock control module and main voltage changing module, the power supply lead end of main voltage changing module connects two-phase primary source, the power output end of main voltage changing module connects the primary source input terminus of double-cricuit supply handover module, first power output end of double-cricuit supply handover module connects main switch-on controlling module, and the 2nd power output end of double-cricuit supply handover module connects main point lock control module, described secondary feeding switch loop comprises time transfer lever, second signal Acquisition Circuit, 2nd central processing unit, 2nd outside signal input circuit, 2nd execution circuit, 2nd Energy control circuit, connection relation is identical with main power feed switch loop, wherein the 2nd Energy control circuit comprises time switch-on controlling module, secondary point of lock control module and time voltage changing module, the power output end of secondary voltage changing module connects the secondary source input terminus of double-cricuit supply handover module, secondary switch-on controlling module connects the first power output end of double-cricuit supply handover module, secondary point of lock control module connects the 2nd power output end of double-cricuit supply handover module, the first described central processing unit and the 2nd central processing unit connect touch display screen simultaneously.
The first described signals collecting circuit comprises main load zero sequence current acquisition mutual inductor, main load running current acquisition mutual inductor group, main load zero sequence voltage acquisition reactor and the main synchronous transformer of load running voltage, described main load zero sequence current acquisition mutual inductor and main load running current acquisition mutual inductor group all adopt punching structure to be serially connected with in the three-phase loop of main transfer lever and main load, and the output terminal of main load zero sequence current acquisition mutual inductor and main load running current acquisition mutual inductor group connects the first central processing unit; Described main load zero sequence voltage acquisition reactor and the input terminus of the main synchronous transformer of load running voltage are connected in the three-phase loop of main transfer lever and main load, and the output terminal of main load zero sequence voltage acquisition reactor and the main synchronous transformer of load running voltage connects the first central processing unit; One end of the primary winding of described main load zero sequence voltage acquisition reactor connects the reactor neutral point detection input terminus of the first central processing unit by the auxiliary normally closed contact of main transfer lever; First signals collecting circuit also comprises main load frequency, current feedback circuit, the input terminus 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 terminus of the first central processing unit.
The main voltage changing module of the first described Energy control circuit comprises the first transformer, and the input terminus of the primary winding of the first transformer is power supply lead end, and three road output terminals of secondary coil connect the primary source input terminus of double-cricuit supply handover module; The main switch-on controlling module of the first described Energy control circuit comprises the first bridge rectifier circuit, the input terminus of the first bridge rectifier circuit connects the first power output end of double-cricuit supply handover module, the electrode input end of the first bridge rectifier circuit is in series with closing by hand button, and the output terminal of the first bridge rectifier circuit connects main transfer lever combined floodgate coil; the master of the first described Energy control circuit divides lock control module to comprise the 2nd transformer, the primary winding of the 2nd transformer connects the 2nd power output end of double-cricuit supply handover module, the output terminal of the first secondary coil of the 2nd transformer connects main load zero sequence current acquisition mutual inductor respectively, main load running current acquisition mutual inductor group, main load zero sequence voltage acquisition reactor and the main synchronous transformer of load running voltage, the output terminal of the second subprime coil of the 2nd transformer connects the 2nd bridge rectifier circuit and the input terminus of the 3rd bridge rectifier circuit by rectification module simultaneously, the electrode input end Series Frequency Conversion of the 2nd bridge rectifier circuit stops relay normally open contact, the output terminal of the 2nd bridge rectifier circuit connects main transfer lever decompression switching winding, the electrode input end series connection manual brake separating button of the 3rd bridge rectifier circuit and main transfer lever normally opened contact, and manual brake separating button is parallel with fault feedback relay normally open contact, the output terminal of the 3rd bridge rectifier circuit connects main transfer lever and divides and encourage switching winding.
Described first outside signal input circuit comprises the normally opened contact of multiple load running control hand push button and main transfer lever combined floodgate feedback switch, frequency conversion trouble relay, described multiple load running control hand push button comprises frequency conversion and starts button, frequency conversion stop button, frequency conversion liter button, frequency conversion frequency reducing button, frequency conversion scram button frequently, main transfer lever combined floodgate feedback switch is the normally opened contact of transfer lever, and the normally opened contact of frequency conversion trouble relay is the normally opened contact of frequency converter failure output terminal rly..
The first described execution circuit comprises frequency conversion startup control coil, frequency conversion stops control coil, frequency conversion is anxious stops control coil, system fault control coil and power current locking fail-safe control coil and voltage sensor, the signal of the signal output terminal outputting standard 4��20mA of voltage sensor to the frequency variation signal input terminus of frequency transformer, as the given input of frequency of frequency transformer.
Described explosion-proof frequency converter comprises air duct, air duct inside is provided with rectangle explosion-proof tank, copper radiator, forceful electric power input wires box, forceful electric power output wiring box, control terminal box, terminal box bearing and frequency transformer core, forceful electric power input wires 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 through air duct barrel with double-loop feeder switch for mine, 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 side, it is inner that frequency transformer 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 the auxiliary fan controlled, and diameter is identical; Two explosion-proof frequency converters are installed by support and two auxiliary fan one.
Described distinguished and admirable automatic shifter has a U shape air duct, the anterior two-port of U shape air duct be air intake position respectively blast tube with two auxiliary fans be connected, U-bend place bottom U shape air duct has out air port, this goes out air port and is connected with air draft pipeline, being hinged with movable doorboard at the prong place going out air port, the both sides going out air port are respectively equipped with the doorframe coordinated with movable doorboard.
Described doorframe is pasted with resilient seal 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 glass fabric swatch, and door-plate both sides are pasted with closed glue pad, are provided with compression steel plate outside rubber cushion.
The present invention, by changing coal-mine local fan control mode, under the control of flame-proof mine intelligence double-loop feeder switch for mine, regulates ventilator rotating speed automatically, realizing as required for wind, the functions such as Intelligent drainage gas, reach energy-saving and cost-reducing, prevention disaster, it is to increase the safe reliability of local ventilation system.
Concrete useful effect is as follows:
Two power supplys in main power feed switch loop and time feeding switch loop are exported electric energy by double-cricuit supply handover module by the present invention, as long as ensureing there is a loop energising, can making Energy control normal circuit operation, Energy control circuit completes the open/close lock of transfer lever mainly through switch-on controlling module and point lock control module; Meanwhile, signals collecting circuit gathers electric current, the voltage signal of load end, is convenient to Real-Time Monitoring load end state; Further, by outside signal input circuit, by control command information conveyance to central processing unit, then send information by control output end to execution circuit by central processing unit, the control coil performing corresponding outside signal input circuit in circuit obtains electric, then controls the running status of load.
Explosion-proof frequency converter is connected by the present invention with local fan, the distinguished and admirable cooling problem solving frequency transformer of utilization office fan, realize air-cooled fast, the centralized Control of frequency transformer, decrease exterior cooling equipment, not only save energy consumption, and greatly reducing equipment cost, two equipment connections are together also convenient simultaneously concentrates observation, monitoring and management; Complete installation, on support, is saved and is installed space.
The present invention is by distinguished and admirable automatic shifter, it is possible to reduces on-the-spot airduct quantity, only adopts single airduct, under the distinguished and admirable pressure of ventilator self, can realize the automatic switching that two ventilators are distinguished and admirable, and structure is simple, and sealing is reliable. And the devices such as gate need not be configured in addition, both improve efficiency, again save cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the schematic circuit diagram of the flame-proof type double-loop feeder switch for mine of the present invention;
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 shifter;
Embodiment
As shown in Figure 1, the present invention includes flame-proof type double-loop feeder switch for mine 1, two flow channel type explosion-proof frequency converters 3 and two auxiliary fans 2, described flame-proof type double-loop feeder switch for mine 1 and the information acquisition model calling of underground coal mine, described flame-proof type double-loop feeder switch for mine 1 powers to respectively two explosion-proof frequency converters 3, and control two explosion-proof frequency converters 3 respectively and carry out work, two explosion-proof frequency converters 3 connect two auxiliary fans 2 respectively, the air port place that goes out of two described auxiliary fans 2 is also provided with distinguished and admirable automatic shifter 5.
Two auxiliary fans 2 are primary auxiliary fan and auxiliary fan for subsequent use, two flow channel type rectangle explosion-proof frequency converters control two auxiliary fans respectively, the information acquisition monitoring station of underground coal mine obtains the signals such as the gas concentration of down-hole different sites, gas concentration lwevel, wind speed, temperature and carries to double-loop feeder switch for mine (with communication between ethernet communication module (LM3403) and the information acquisition monitoring station of underground coal mine, X is optical fiber interface) from coal mine downhole safety supervisory system. Double-loop feeder switch for mine is according to the output current frequency of the parameter logic relation adjustment explosion-proof frequency converter of setting, fan motor rotating speed of playing a game adjusts, regulate fan delivery, meet mine ventilation demand and energy-saving run, there is the function supplying wind as required, solve present mine blast volume non-adjustable, " cancelling all things together " phenomenon. Analyzing logic control condition is formulated has gas lower than increase air quantity high speed gas-removing during alarming value, gas slows down gas discharge rate scheme higher than reduction air quantity during alarming value, whole gas-removing process safety is efficient, the mode of the stifled plank of artificial employing or bundle air duct is not needed to carry out, improve gas discharge rate, it is to increase personnel safety.
Flame-proof type double-loop feeder switch for mine 1 has touch display screen 12, manual control button 13, can realize LCD screen display on the spot, on the spot control and remote control function; Sound and light alarm can be realized and remind power-off; Also there is lock between air and electricity, gas electricity locking, carbonic acid gas electricity locking, temperature electricity locking, the functions such as high efficiency smart gas-removing, and system self can be monitored and trouble diagnosis, a key start can be realized, automatically switch the function of blower fan, auto parallel Connection operation. When user configures upper computer unit, the operation of remote controlled many cover intelligence blower fans. The present invention realizes communication by the communication interface (RS232) of two low voltage network intelligent protection modules and touch display screen 12, the electric current of reading frequency transformer, frequency, fault, motor steering, far and near journey signal.
Described in flame-proof type double-loop feeder switch for mine 1 is specific as follows: include flameproof enclosure, flameproof enclosure comprises main chamber and wire connection cavity, being provided with core frame and double-loop feeder switch for mine circuit card in main chamber, side, main chamber is provided with double loop transfer lever, and wire connection cavity arranges many wiring outlets, double-loop feeder switch for mine circuit card includes main power feed switch loop, secondary feeding switch loop and double-cricuit supply handover module, main power feed switch loop comprises main transfer lever QS2, the first signals collecting circuit, the first central processing unit U1, the first Energy control circuit, the first outside signal input circuit, the first execution circuit, and wherein main transfer lever QS2 is series in the three-phase loop of primary source and main load, main resistance-capacitance absorption device ZR2 is connected between main transfer lever QS2 and load 2# frequency transformer. same time resistance-capacitance absorption device ZR1 is connected to secondary between transfer lever QS1 and load 1# frequency transformer. in FIG, connection terminal L1, L2, L3 connect secondary source (1# power supply), and L31, L32, L32 connect primary source (2# power supply), and connection terminal L21, L22, L23 connect 1# frequency transformer, and connection terminal L41, L42, L43 connect 2# frequency transformer. described secondary feeding switch loop comprises time transfer lever, second signal Acquisition Circuit, 2nd central processing unit U2, 2nd outside signal input circuit, 2nd execution circuit, 2nd Energy control circuit, circuit element and the relation of connection in secondary feeding switch loop are consistent with main power feed switch loop, double-cricuit supply handover module is not had the difference is that in the 2nd Energy control circuit, share a double-cricuit supply handover module: the 2nd Energy control circuit comprises time switch-on controlling module, secondary point of lock control module and time voltage changing module, the power output end of secondary voltage changing module connects the secondary source input terminus of double-cricuit supply handover module, secondary switch-on controlling module connects the first power output end of double-cricuit supply handover module, secondary point of lock control module connects the 2nd power output end of double-cricuit supply handover module. wherein, the first central processing unit, the 2nd central processing unit all adopt low voltage network intelligent protection module, model LM3108K1.
It is described with main power feed switch loop below:
The first described signals collecting circuit comprises main load zero sequence current acquisition mutual inductor TA8, main load running current acquisition mutual inductor group TA4, TA5, TA6, main load zero sequence voltage acquisition reactor T11 and the synchronous transformer T5 of main load running voltage, described main load zero sequence current acquisition mutual inductor TA8 and main load running current acquisition mutual inductor group TA4, TA5, TA6 all adopts in the three-phase loop that punching structure is serially connected with main transfer lever QS2 and main load 2# frequency transformer, main load zero sequence current acquisition mutual inductor TA8 and main load running current acquisition mutual inductor group TA4, TA5, the output terminal of TA6 connects the pin I0 of the first central processing unit U1 respectively, COM and IA, IB, IC, the input terminus of described main load zero sequence voltage acquisition reactor T11 and main load running voltage synchronous transformer T5 is parallel in the three-phase loop of main transfer lever QS2 and main load 2# frequency transformer, and the output terminal of main load zero sequence voltage acquisition reactor T11 and the synchronous transformer T5 of main load running voltage connects pin U0, COM and UA, UB, UC of the first central processing unit respectively. one end of the primary winding of described main load zero sequence voltage acquisition reactor T11 connects the reactor neutral point detection input terminus RL being connected the first central processing unit U1 by the auxiliary normally closed contact QS2 and resistance R2 of main transfer lever, for detecting whether main transfer lever QS2 closes a floodgate, electric capacity C3, C4 are filter capacitor. the input terminus of load frequency, current feedback circuit connects 2# frequency transformer, the output terminal of load frequency, current feedback circuit connects three-phase simulation amount input terminus (AL1+, AL2+, AL-) of the first central processing unit U1, resistance R5 is connected between AL1+ and AL-, and resistance R6 is connected between AL2+ and AL-.
The status information input terminus of the first described central processing unit U1 connects the output terminal of the first outside signal input circuit, first outside signal input circuit comprises the normally opened contact of the normally opened contact KA6(frequency converter failure output terminal rly. of multiple load running control hand push button and main transfer lever combined floodgate feedback switch QS2, frequency conversion trouble relay), described multiple load running control hand push button 4 comprises that frequency conversion starts button SB10, frequency conversion stop button SB11, frequency conversion rise button SB12, frequency conversion frequency reducing button SB13, frequency conversion scram button SB14 frequently; The control output end of the first central processing unit U1 connects the first execution circuit, and the first execution circuit comprises frequency conversion startup control coil KA8, frequency conversion stops control coil KA9, frequency conversion is anxious stops control coil KA10, system fault control coil KA11 and power current locking fail-safe control coil KA12, voltage sensor. The analog output unit of the first central processing unit U1 passes through the frequency given input of voltage sensor P2 outputting standard 4��20mA signal as 2# frequency transformer.
The first described Energy control circuit comprises main switch-on controlling module, main point lock control module and main voltage changing module, main voltage changing module comprises the first transformer T2, the input terminus of the primary winding of the first transformer T2 is power supply lead end, power supply lead end connects the two-phase of primary source, and three road output terminals of secondary coil connect the primary source input terminus of double-cricuit supply handover module. Electric energy is come by the first Energy control circuit by the primary winding collection of the first transformer T2, secondary coil through the first transformer T2 carries out transformation process again, export 220V/250w, 127V/250w voltage respectively, carry to double-cricuit supply handover module, as the main power supply end of double-cricuit supply handover module; Meanwhile, in secondary feeding switch loop also can to double-cricuit supply handover module transmission of electric energy, as double-cricuit supply handover module time power supply end; Wherein 127V power supply after double-cricuit supply handover module as vacuum interrupter closing operation power supply; Owing to 220V exports the 2nd transformer T3, bridge rectifier module output DC48V, DC10V to through double-cricuit supply handover module, wherein DC48V is as two loop vacuum interrupter sub-switching operation power supplys, and DC10V is as the control power supply of components and parts in system core central processing unit and signals collecting circuit. Double-cricuit supply handover module is existing mature technology, is equivalent to introduce two power supplys, then exports by an outlet, does not repeat them here.
The main switch-on controlling module of the first Energy control circuit comprises the first bridge rectifier circuit D1, the input terminus of the first bridge rectifier circuit D1 connects the first power output end of double-cricuit supply handover module, the electrode input end of the first bridge rectifier circuit D1 is in series with closing by hand button SB8, the output terminal of the first bridge rectifier circuit D1 connects main transfer lever combined floodgate coil J2, by pressing closing by hand button SB8 manually, hand push button SB8 closes, then main transfer lever combined floodgate coil J2 obtains electric, main transfer lever QS2 feed motion; The master of the first Energy control circuit divides lock control module to comprise the 2nd transformer T3, the primary winding of the 2nd transformer T3 connects the 2nd power output end of double-cricuit supply handover module, the output terminal of first secondary coil of the 2nd transformer T3 connects main load zero sequence current acquisition mutual inductor TA8, main load running current acquisition mutual inductor group TA4, TA5, TA6, main load zero sequence voltage acquisition reactor T11 and the synchronous transformer T5 of main load running voltage respectively, for it provides electric energy; The output terminal of the second subprime coil of the 2nd transformer T3 connects the 2nd bridge rectifier circuit D2 and the input terminus of the 3rd bridge rectifier circuit D3 by rectification module simultaneously, the electrode input end Series Frequency Conversion of the 2nd bridge rectifier circuit D2 stops the normally opened contact KA9 of rly., when the frequency conversion stopping control coil KA9 in the first execution circuit obtains electric, this frequency conversion stops relay normally open contact KA9 and automatically closes, the main transfer lever decompression switching winding J5 that then the 2nd bridge rectifier circuit D2 output terminal connects obtains electric, so that main transfer lever QS2 divides lock action; The electrode input end series connection manual brake separating button SB9 and main transfer lever normally opened contact QS2 of the 3rd bridge rectifier circuit D3, and manual brake separating button SB9 is parallel with the normally opened contact KA7 of fault feedback rly., the coil KA7 connecting valve power supply of fault feedback rly., coil KA7 also normally opened contact KA6 with the trouble relay of 2# frequency transformer connect. When 2# frequency converter failure, trouble relay obtains and electric sends trouble signal, normally opened contact KA6 closes, then fault feedback relay1 coil KA7 obtains electric, then the normally opened contact KA7 of fault feedback rly. closes, main transfer lever divides encourages switching winding J6 and obtains electric, so that main transfer lever QS2 divides lock action.
As shown in Figure 2; two complete independent loops are adopted during normal operation of the present invention; namely main power feed switch loop, secondary feeding switch loop; utilize the normally opened contact of main transfer lever QS2 and time transfer lever QS1(and vacuum interrupter) control the break-make of two frequency conversions integrations offices fans respectively, it is aided with the operation over-voltage protection function that main resistance-capacitance absorption device ZR1, ZR2 realize vacuum interrupter.
First central processing unit U1 (LM3108K1) gathers load inverter running current by main load running current acquisition mutual inductor group T4, T5, T6, main load zero sequence current acquisition mutual inductor TA8 gathers load inverter zero sequence electric current, as the electric current protection benchmark of office's fan and frequency transformer; First central processing unit U1 gathers load voltage signal by main load running voltage synchronous transformer T5, main load zero sequence voltage acquisition reactor T11 gathers load zero sequence voltage signal, as the voltage protection benchmark of office's fan and frequency transformer.
The integrated logical block of first central processing unit U1 is by software programming and configuration monitoring information acquisition On-off signal, realized the feedback of status input of 2# vacuum interrupter by the main transfer lever QS2 of vacuum interrupter, manually button SB10, SB11, SB12, SB13, SB14 realizes the starting of 2# frequency transformer, stopping, liter frequency, frequency reducing, urgency stopping transportation enter; Steering logic unit in first central processing unit U1 is by software programming and Combining soft control output switch parameter, realize the starting of 2# frequency transformer, stopping by KA8, KA9, KA10, KA11, KA12 respectively, anxious stop, report to the police, lock-in control, thus realize the running of control blower fan. When needs 2# frequency transformer starts, the frequency conversion manually pressed in the first outside signal input circuit starts button SB10, after low voltage network intelligent protection module receives frequency conversion startup command, through inner logical operation, control coil KA8 power transmission is started to the frequency conversion in the first execution circuit, then the normally opened contact of the control coil KA8 of 2# frequency transformer end closes, and 2# frequency transformer obtains electric work; When needs 2# frequency transformer stops, there are two kinds of situations, one: artificially need 2# frequency transformer to stop, manually by down coversion stop button SB11, first central processing unit U1 receives after frequency conversion ceases and desist order, and through the logical operation of inside, stops control coil KA9 power transmission to the frequency conversion in the first execution circuit, then the normally opened contact of the control coil KA9 of 2# frequency transformer end closes, 2# frequency transformer stopping work; Two, when the first central processing unit U1 inside collects the trouble signal of frequency transformer, then sending signal makes frequency conversion stopping control coil KA9 obtain electric, frequency conversion in Energy control circuit stops relay normally open contact KA9 and automatically closes, main transfer lever decompression switching winding J5 obtains electric, main transfer lever QS2 divides lock, disconnects 2# converter power supply; When rising frequency or frequency reducing when needs frequency conversion, first central processing unit U1 judges user's ascending, descending intention under the existing frequency run, regulate the output terminal of analog quantity to export 4��20mA signal by voltage sensor P2, controlled the frequency lifting of frequency transformer by this signal; When 2# frequency transformer breaks down, the trouble relay coil of 2# frequency transformer end obtains electric, frequency conversion trouble relay normally opened contact KA6 in first outside signal input circuit closes automatically, first central processing unit sends signal makes the system fault control coil KA10 in the first execution circuit obtain electric, system fault warning circuit is sounded the alarm, and cuts off the power supply of frequency transformer simultaneously. Electricity locking fail-safe control coil KA12 achieves lock between air and electricity, gas electricity locking, carbonic acid gas electricity locking, temperature electricity locking.
The principle of work in secondary feeding switch loop is the same with the principle of work 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, coal-mine local fan integration flow channel type rectangle explosion-proof frequency converter, comprise air duct 31, rectangle explosion-proof tank 32, copper radiator 33, forceful electric power input wires box 34, forceful electric power output wiring box 35, control terminal box 36, terminal box bearing 37 and frequency transformer core 38, forceful electric power input wires box 34, 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 is through air duct 31 barrel and external power equipment connection, the other end is connected with rectangle explosion-proof tank 32, rectangle explosion-proof tank 32 is fixed in air duct 31 by unsettled, copper radiator 33 is installed on rectangle explosion-proof tank 32 side, it is inner that frequency transformer core 38 is fixedly installed in rectangle explosion-proof tank 32, except air duct 31, it is inner that described all components and parts are all arranged on air duct 31, fixed feet 39 it is provided with below air duct 31.
The present invention directly fans with down-hole office and is connected, it is identical that what the diameter of air duct 31 was fanned with corresponding connection use office goes out air duct diameter, the circuit opening and closing of forceful electric power input wires box 34, forceful electric power output wiring box 35 and control terminal box 36 co-controlling the present invention, operationally, it is distinguished and admirable under the constraint of air duct 31 that office's fan is pressed into, directly flow through from explosion-proof tank 32 and copper radiator 33 surface, by the heat exchange between distinguished and admirable and explosion-proof tank 32, copper radiator 33, it is achieved the quick cooling of frequency transformer.
Described in distinguished and admirable automatic shifter is specific as follows: referring to Fig. 5, the distinguished and admirable automatic shifter of the mine ventilating fan of the present invention, this device has a U shape air duct 51, the anterior two-port of air duct 51 is that air intake position is connected with the blast tube of primary blower fan and stand-by fan respectively, bottom air duct, U-bend place has out air port 56, this goes out air port 56 and is connected with air draft pipeline, it is connected with movable doorboard 54 by hinge 53 at the prong place going out air port 56, in order to strengthen the sealing at shutoff position, the doorframe 52 coordinated with movable doorboard 54 it is respectively equipped with in the both sides going out air port 56, doorframe is equipped with magnetic suction block 55, wherein, the quantity of the magnetic suction block 55 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 installation erect by U shape air duct 51, the magnetic suction block 55 being positioned on the doorframe of upside preferably arranges 3, to overcome gravity when movable doorboard 54 upwards overturns, allows door-plate keep steady state in fan operation process. its upset fast automatically can be realized by himself gravity when considering that movable doorboard 54 overturns downwards, the doorframe of downside arranges 1 magnetic suction block, mainly play auxiliary seal effect, also can conduct oneself with dignity to be formed with movable doorboard 54 and make a concerted effort, allow movable doorboard 54 keep stationary state in fan operation process. described movable doorboard 54 adopts epoxy glass fabric swatch, weight can be alleviated, it is pasted with seal gasket in movable doorboard 54 both sides, be provided with outside seal gasket and compress steel plate (not shown), this compression steel plate can not only prevent seal gasket from coming off, moreover it is possible to absorption magnetic suction block 55. after movable doorboard 54 is fixing with hinge 53, can freely rotate between two doorframes 52, when movable doorboard 54 contacts with any side doorframe 52, this connection that is distinguished and admirable and air draft pipeline can be cut off. by the upset of movable doorboard 54 can replace by both sides intake stack shutoff, correspondingly by unimpeded for the intake stack of another side. rigid impact between movable doorboard 54 and doorframe 52 during in order to avoid overturning, and the sealing property that can strengthen between movable doorboard 54 and doorframe 52, and stablize its sealed state, doorframe 52 is stained with resilient seal packing ring. this device is in use, when primary ventilator breaks down out of service, stand-by fan can be started by controlling organization control, the movable doorboard 54 that shutoff blows the mouth of pipe at it is blown open by airflow voluntarily that produce by it, and make movable doorboard 54 under the effect of primary ventilator air-supply mouth magnetic suction block 55, movable doorboard 54 is fitted in rapidly on the doorframe 52 of its air-supply mouth, and air-flow supplies wind by the air supply duct connecting ventilator for subsequent use through exhaust duct. identical with above-mentioned switching to the handoff procedure of primary ventilator by ventilator for subsequent use. thus, it is not necessary to manual operation, the automatic switching that primary, spare two ventilators are distinguished and admirable can be realized, and very quick. this apparatus structure is simple, and stopping property is good, cheap for manufacturing cost.
Claims (9)
1. an intelligent coal mine local ventilation system, it is characterized in that: include flame-proof type double-loop feeder switch for mine, two flow channel type explosion-proof frequency converters and two auxiliary fans, the information acquisition model calling of described flame-proof type double-loop feeder switch for mine and underground coal mine, described flame-proof type double-loop feeder switch for mine 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 two auxiliary fans respectively, the air port place that goes out of two described auxiliary fans is also provided with distinguished and admirable automatic shifter,
Described double-loop feeder switch for mine includes flameproof enclosure, and flameproof enclosure comprises main chamber and wire connection cavity, is provided with core frame and double-loop feeder switch for mine circuit card in main chamber, and side, main chamber is provided with main transfer lever and time transfer lever, and wire connection cavity arranges wiring outlet, double-loop feeder switch for mine circuit card includes main power feed switch loop, secondary feeding switch loop and double-cricuit supply handover module, main power feed switch loop comprises main transfer lever, first signals collecting circuit, first central processing unit, first Energy control circuit, first outside signal input circuit and the first execution circuit, main transfer lever is series in the three-phase loop of primary source and main load, the first described signals collecting circuit input end is serially connected with between main transfer lever and main load, the output terminal of the first signals collecting circuit connects the acquired signal input terminus of the first central processing unit, the status information input terminus of the first central processing unit connects the output terminal of the first outside signal input circuit, the control output end of the first central processing unit connects the first execution circuit, the action contact of the first execution circuit connects explosion-proof frequency converter, the first described Energy control circuit comprises main switch-on controlling module, main point lock control module and main voltage changing module, the power supply lead end of main voltage changing module connects two-phase primary source, the power output end of main voltage changing module connects the primary source input terminus of double-cricuit supply handover module, first power output end of double-cricuit supply handover module connects main switch-on controlling module, and the 2nd power output end of double-cricuit supply handover module connects main point lock control module, described secondary feeding switch loop comprises time transfer lever, second signal Acquisition Circuit, 2nd central processing unit, 2nd outside signal input circuit, 2nd execution circuit, 2nd Energy control circuit, secondary transfer lever is series at secondary source with the three-phase loop of time load, described second signal Acquisition Circuit input terminus is serially connected with secondary between transfer lever and secondary load, the output terminal of second signal Acquisition Circuit connects the acquired signal input terminus of the 2nd central processing unit, the status information input terminus of the 2nd central processing unit connects the output terminal of the 2nd outside signal input circuit, the control output end of the 2nd central processing unit connects the 2nd execution circuit, the action contact of the 2nd execution circuit connects explosion-proof frequency converter, wherein the 2nd Energy control circuit comprises time switch-on controlling module, secondary point of lock control module and time voltage changing module, the power output end of secondary voltage changing module connects the secondary source input terminus of double-cricuit supply handover module, secondary switch-on controlling module connects the first power output end of double-cricuit supply handover module, secondary point of lock control module connects the 2nd power output end of double-cricuit supply handover module, the first described central processing unit and the 2nd central processing unit connect touch display screen simultaneously.
2. intelligent coal mine local ventilation system according to claim 1, it is characterized in that: the first described signals collecting circuit comprises main load zero sequence current acquisition mutual inductor, main load running current acquisition mutual inductor group, main load zero sequence voltage acquisition reactor and the main synchronous transformer of load running voltage, described main load zero sequence current acquisition mutual inductor and main load running current acquisition mutual inductor group all adopt punching structure to be serially connected with in the three-phase loop of main transfer lever and main load, the output terminal of main load zero sequence current acquisition mutual inductor and main load running current acquisition mutual inductor group connects the first central processing unit, described main load zero sequence voltage acquisition reactor and the input terminus of the main synchronous transformer of load running voltage are connected in the three-phase loop of main transfer lever and main load, and the output terminal of main load zero sequence voltage acquisition reactor and the main synchronous transformer of load running voltage connects the first central processing unit, one end of the primary winding of described main load zero sequence voltage acquisition reactor connects the reactor neutral point detection input terminus of the first central processing unit by the auxiliary normally closed contact of main transfer lever, first signals collecting circuit also comprises main load frequency, current feedback circuit, the input terminus 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 terminus of the first central processing unit.
3. intelligent coal mine local ventilation system according to claim 2, it is characterized in that: the main voltage changing module of the first described Energy control circuit comprises the first transformer, the input terminus of the primary winding of the first transformer is power supply lead end, and three road output terminals of secondary coil connect the primary source input terminus of double-cricuit supply handover module; The main switch-on controlling module of the first described Energy control circuit comprises the first bridge rectifier circuit, the input terminus of the first bridge rectifier circuit connects the first power output end of double-cricuit supply handover module, the electrode input end of the first bridge rectifier circuit is in series with closing by hand button, and the output terminal of the first bridge rectifier circuit connects main transfer lever combined floodgate coil; the master of the first described Energy control circuit divides lock control module to comprise the 2nd transformer, the primary winding of the 2nd transformer connects the 2nd power output end of double-cricuit supply handover module, the output terminal of the first secondary coil of the 2nd transformer connects main load zero sequence current acquisition mutual inductor respectively, main load running current acquisition mutual inductor group, main load zero sequence voltage acquisition reactor and the main synchronous transformer of load running voltage, the output terminal of the second subprime coil of the 2nd transformer connects the 2nd bridge rectifier circuit and the input terminus of the 3rd bridge rectifier circuit by rectification module simultaneously, the electrode input end Series Frequency Conversion of the 2nd bridge rectifier circuit stops relay normally open contact, the output terminal of the 2nd bridge rectifier circuit connects main transfer lever decompression switching winding, the electrode input end series connection manual brake separating button of the 3rd bridge rectifier circuit and main transfer lever normally opened contact, and manual brake separating button is parallel with fault feedback relay normally open contact, the output terminal of the 3rd bridge rectifier circuit connects main transfer lever and divides and encourage switching winding.
4. intelligent coal mine local ventilation system according to claim 3, it is characterized in that: the outside signal input circuit of described first comprises multiple load running control hand push button and main transfer lever combined floodgate feedback switch, the normally opened contact of frequency conversion trouble relay, described multiple load running control hand push button comprises frequency conversion and starts button, frequency conversion stop button, frequency conversion rises button frequently, frequency conversion frequency reducing button, frequency conversion scram button, main transfer lever combined floodgate feedback switch is the normally opened contact of transfer lever, the normally opened contact of frequency conversion trouble relay is the normally opened contact of frequency converter failure output terminal rly..
5. intelligent coal mine local ventilation system according to claim 4, it is characterized in that: the first described execution circuit comprises frequency conversion startup control coil, frequency conversion stops control coil, frequency conversion is anxious stops control coil, system fault control coil and power current locking fail-safe control coil and voltage sensor, the signal of the signal output terminal outputting standard 4��20mA of voltage sensor to the frequency variation signal input terminus of frequency transformer, as the given input of frequency of frequency transformer.
6. intelligent coal mine local ventilation system 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 wires box, forceful electric power output wiring box, control terminal box, terminal box bearing and frequency transformer core, forceful electric power input wires 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 through air duct barrel with double-loop feeder switch for mine, 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 side, it is inner that frequency transformer core is fixedly installed in rectangle explosion-proof tank, described air inlet channel below air duct is provided with fixed feet.
7. intelligent coal mine local ventilation system according to claim 6, it is characterised in that: the air duct of described explosion-proof frequency converter communicates with the air duct of the auxiliary fan controlled, and diameter is identical; Two explosion-proof frequency converters are installed by support and two auxiliary fan one.
8. intelligent coal mine local ventilation system according to claim 1, it is characterized in that: described distinguished and admirable automatic shifter has a U shape air duct, the anterior two-port of U shape air duct be air intake position respectively blast tube with two auxiliary fans be connected, U-bend place bottom U shape air duct has out air port, this goes out air port and is connected with air draft pipeline, being hinged with movable doorboard at the prong place going out air port, the both sides going out air port are respectively equipped with the doorframe coordinated with movable doorboard.
9. intelligent coal mine local ventilation system according to claim 8, it is characterised in that: described doorframe is pasted with resilient seal 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 glass fabric swatch, and door-plate both sides are pasted with closed glue pad, are provided with compression steel plate outside rubber cushion.
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| CN201310623015.9A CN103591041B (en) | 2013-11-30 | 2013-11-30 | Intelligent coal mine local ventilation system |
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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 |
| CN105041375B (en) * | 2015-05-20 | 2017-10-17 | 北京山潜天恒科技有限公司 | A kind of mine local fan ventilated control system |
| 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 |
| CN110380380B (en) * | 2019-07-24 | 2024-07-05 | 河北宝凯电气股份有限公司 | Intelligent load protection system of circuit breaker |
| 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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