CN201051615Y - Explosion insulated for mine and secure combined switch - Google Patents
Explosion insulated for mine and secure combined switch Download PDFInfo
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- CN201051615Y CN201051615Y CNU2007200204413U CN200720020441U CN201051615Y CN 201051615 Y CN201051615 Y CN 201051615Y CN U2007200204413 U CNU2007200204413 U CN U2007200204413U CN 200720020441 U CN200720020441 U CN 200720020441U CN 201051615 Y CN201051615 Y CN 201051615Y
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Abstract
The utility model relates to a mine-used flame-proof and intrinsically safe type combined switch, which comprises a flame-proof outer casing and a circuit part, wherein the circuit part comprises 2 to 8 major loops which are constituted by isolating and reversing switches, and contactors and the like, and a control circuit which is constituted by a main control transformer, an intermediate relay, an emergency stop button, an electric locking button, a leader control circuit, an electric current and electric voltage sampling protecting circuit, an earth leakage protective circuit, and a PLC and the like. A display screen and a keyboard of the PLC are mounted in a front door of a main control cavity, a protection and control loop of each major loop is connected with the PLC to get centralized monitoring. A plurality of generators of complete set of equipment can be started, stopped, and protected by the utility model through the PLC, and switch behaviors and fault types can be displayed and memorized by the PLC, and the PLC can largely improve judgment and failure removing efficiency, whose control modes are flexible and various. Integration interchangeability and socket screw of component parts can satisfy fast failure dealing requirements under wells. An electric cable is led out to be used as a bell mouth and a cable-to-cable connector, which can simultaneously input 140V and 660 V. The whole technical level is improved.
Description
Technical field
The utility model relates to the flame-proof mine magnetic starter, particularly a kind of complete set of equipments multiple electric motors start and stop such as colliery down-hole mining, transportation and mine explosion-suppression and intrinsic safety type unit switch of protecting usefulness controlled.
Background technology
The flame-proof mine unit switch of prior art, the protective circuit of its each major loop is independent, is not centralized monitor, has increased the fault point like this.Flameproof enclosure does not have independent isolating switch chamber, has only wire connection cavity and master control chamber.The power supply that major loop connects can only be a kind of electric pressure, as: exchange 1140V or 660V.Main loop cabling is introduced, is drawn and adopt traditional horn mouth mode, and form is single.The major loop line ball of contactor adopts cable crimping mode, maintenance is inconvenient, and some producer has adopted inserting mode, but still can not adapt to the requirement of fast processing fault under the coal mine, control mode to motor is fairly simple, can not adapt to the diversified demand of different mines.
Summary of the invention
For overcome existing underground mine use unit switch simple to the control mode of motor, can not adapt to that different mines variation controls require, fault point is many, deficiency that can not the fast processing fault; the utility model provides a kind of mine explosion-suppression and intrinsic safety type unit switch; the control of its a plurality of major loops is adopted computer technology to concentrate with protection and is finished; can show the fault type of switch and memory; be convenient to on-the-spot fast processing fault; control mode is versatile and flexible, be convenient to set, and can adapt to the diversified requirement of different mines.
The technical scheme that its technical problem that solves the utility model adopts is:
The mine explosion-suppression and intrinsic safety type unit switch comprises flameproof enclosure and circuit part.Its flameproof enclosure is made of wire connection cavity, master control chamber; Wire connection cavity has cable to lead in/out device; There is the Qianmen in the master control chamber, is quick opening structure, and mechanical lock is arranged.Its circuit part is the main major loop that constitutes with the contactor by 2～8 the tunnel, and the control loop of each major loop constitutes.Each major loop is formed by isolating reversing switch, contactor, resistance capaciting absorpting circuit etc.The control loop of major loop is by magnetic coil, auxiliary relay, the leading control circuit of master control transformer, stop button, contactor, and formation such as current sampling and protective circuit, voltage sampling and protective circuit, leakage protection circuit.Guide's control loop is made of intrinsic safety type control transformer, starting button, stop button, relay etc.Circuit part has additional the display screen and the keyboard of PLC and connection thereof.Display screen and keyboard are installed on the Qianmen in master control chamber, so that operation and observation.The protective circuit of each major loop is connected with PLC with control loop, realizes centralized monitor and protection.Concrete connection is as follows:
1. the auxiliary relay coil of each major loop control loop is respectively with the corresponding connection of the corresponding lead-out terminal of PLC; The normal opened contact of these auxiliary relays respectively with the corresponding series connection of magnetic coil of each contactor, and connect with scram button, electric blocking button, be connected in the both ends of power of control loop after the series connection.
2. in the leading control circuit of each major loop control loop, the normal opened contact of the relay that its coil is connected with starting button, stop button, through optocoupler respectively with the corresponding connection of the corresponding input terminal of PLC.
3. the normal opened contact of each major loop contactor is through the corresponding connection of the corresponding input wires terminal with PLC of optocoupler.
4. the output of each control loop leakage protection circuit is through optocoupler and the corresponding connection of PLC respective input.
5. the corresponding connection of the output of the current sampling of each control loop and protective circuit with the PLC respective input.
6. the corresponding connection of the output of the voltage sampling of each control loop and protective circuit with the PLC respective input.
7. the circuit output end of intrinsic safety keyboard, through optocoupler respectively with the corresponding connection of the corresponding input terminal of PLC.
Above-mentioned 2., 5., 6., the 7. connection in the money, will control with guard signal and send PLC to handle, drive auxiliary relay and loop thereof by the corresponding lead-out terminal of PLC, carry out corresponding start and stop control and protection.
The technical scheme that its technical problem that solves the utility model adopts can also be:
The flameproof enclosure of mine explosion-suppression and intrinsic safety type unit switch is provided with the isolating switch chamber.The contactor of each major loop and most of protective circuit thereof are adorned respectively and are one, form independent driver, and are installed on the core frame master control chamber in formation drawing and pulling type structure.The connected mode of each driver main power source input, output is for pegging graft.Isolate reversing switch and adopt four, be connected every group of two major loops respectively with four groups of major loops.It is horn mouth and the dual-purpose form of cable connector that the wire connection cavity main loop cabling leads in/out device.Different major loops can be imported the three phase supply voltage of two kinds of different electric pressures simultaneously, for example: 1140V, 660V.
The beneficial effects of the utility model are:
1. collect multiple motors control, be protected in one, simplified the cable connection, reduced cable use amount and electric equipment floor space.Also can reduce line drop loss, installation and maintenance workload.
2. integrated, the interchangeability of accessory, and adopt the grafting technology, satisfy the requirement of down-hole fast processing fault and maintenance.
3. the unit switch protection adopts PLC that system is concentrated surveillance monitor with control system.Can reduce the fault point convenient management and manipulation.Defencive function is complete, reliable, possesses overload, short circuit, the phase failure, electric leakage, overvoltage, kinds of protect function such as under-voltage.Adopt LCDs man-machine interface and 16 key intrinsic safety keyboards, can show to operating state, parameter and the fault type of switch and memory that friendly user interface has good human-computer dialogue function, the efficient that can improve failure judgement greatly and fix a breakdown.
4. the introducing of main loop cabling, drawing can be according to user's requirement, adopts cable connector or traditional horn mouth mode of connection.The Electric Machine Control mode is versatile and flexible, can set and change according to customer requirements.
5. major loop can be imported 1140V and 660V simultaneously.The whole synthesis technical merit has generally raising.
Description of drawings
Fig. 1, the 2nd, the utility model major loop with the structural representation master that horn mouth connects look, left view.
Fig. 3, the 4th, structural representation master, left view that the utility model major loop connects with cable connector.
Fig. 5, the 6th, the structural representation master cutaway view of counter flange of the present utility model, left view.
Fig. 7 is a schematic block circuit diagram of the present utility model.
Fig. 8 is the first loop major loop schematic diagram of the present utility model.
Fig. 9 is PLC control principle figure of the present utility model.
Figure 10 is the homepage that LCDs shows.
Figure 11 is the schematic diagram of keyboard disk.
Figure 12 is that the drive parameter that LCDs shows is provided with page or leaf.
Figure 13 is that the A drive parameter that LCDs shows is provided with page or leaf.
Among the figure: 1-horn mouth, 2-left side wire connection cavity, 3-master control chamber, 4-isolating switch chamber, 5-isolate reversing switch, 6-electric blocking button, 7-LCDs, 8-mechanical lock, 9-metal keyboard, the right wire connection cavity of 10-, 11-cable connector, 12-counter flange, 13-Programmable Logic Controller PLC, 14-driver, 15-master control transformer, 16-sampling transformer, 17-electric parameters transducer.Annotate: optocoupler, i.e. photoelectrical coupler; Contactor, i.e. AC vacuum contactor; Intrinsic safety type, intrinsic safety, i.e. essential safe type.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model mine explosion-suppression and intrinsic safety type unit switch is applicable under the coal mine and surrounding medium has explosive gas atmospheres such as coal dust and methane.In exchanging 50HZ, voltage 1140V or 660V supply line, many threephase asynchronouses or duplex winding asynchronous motor starting are stopped to control and protecting.
Embodiment 1:
In a kind of structure of mine explosion-suppression and intrinsic safety type unit switch shown in Fig. 1,2, be the structure that major loop adopts horn mouth to connect.Flameproof enclosure is a cuboid, claims flameproof cabinet again.Flameproof cabinet divides four chambeies, and left wire connection cavity 2, right wire connection cavity 10, isolating switch chamber 4 and master control chamber 3 are arranged.About respectively have six cables to introduce, draw horn mouth 1 on two wire connection cavities.According to user's different requirements, there are two kinds to lead in/out mode for selecting for use, this example is for directly leading in/out mode with horn mouth.Main terminal and nine core cable connection posts are arranged in the wire connection cavity, be provided with end cap, be convenient to the connection and the maintenance of each return cable in binding post one side.Four isolation reversing switches 5, main terminal and nine core binding posts are arranged in the isolating switch chamber 4.Between the handle of isolation reversing switch 5 and Qianmen, master control chamber reliable mechanical lock 8 is arranged, the locking measure is guaranteed that flameproof cabinet is opened behind the door and can't be operated this unit switch, and all conducting positions are all not charged, and all isolation reversing switches in back that guarantee to open the door are in the disjunction state.On the contrary, only after the Qianmen is correctly closed, isolate reversing switch 5 and can carry out closing operation.In addition, isolate the other electric blocking button 6 that also is provided with of handle of reversing switch 5, realize electric blocking.Machine security interlocking gear and electric blocking can be guaranteed the security performance of this unit switch.Two quick opening structures are adopted in master control chamber 3.LCDs 7, keyboard 9 and explosion-proof sign board " Exd[ib] I " are installed on the left front door.Keyboard 9 is 16 key intrinsic safety metal keyboards, special tailor-made.On the right front door safety of coal mines sign board " MA " is arranged.
Structure in the flameproof cabinet can be referring to Fig. 3,4.Fig. 3,4 is depicted as the structure of this unit switch embodiment 2, and it illustrates the internal structure that the Qianmen is opened in the master control chamber.The internal structure of the flameproof cabinet of two embodiment is identical.On the left front door inwall Programmable Logic Controller 13 is housed, is PLC, PLC is connected with LCDs 7 by special-purpose connecting line, and is connected with keyboard 9.On the right front door inwall four sampling transformers 16 and electric parameters transducer 17 are installed.Driver mounting core frame is arranged in the master control chamber, and eight drivers 14 are installed on the drawing and pulling type shelf of core frame.The core frame rear of master control transformer 15 in this chamber.
Integrated, the modularization of so-called parts, and adopt the grafting technology, that is: AC vacuum contactor, current transformer, resistance capaciting absorpting circuit and residual current protective unit etc. all are integrated in the casing, form independent driver 14.Eight driver A～H are just the same, have interchangeability.Accessory adopts inserting mode: when driver 14 inserted the core frame, main power source input, output plug can automatically be pegged graft.Satisfy the requirement of down-hole fast processing fault and maintenance.
The circuit that figure 7 illustrates this unit switch is formed.Whole unit switch is divided into four the tunnel, first via three phase mains main terminal A1, B1, C1, divide two-way to meet two contactor KM1, KM2 respectively through isolating reversing switch QS1, behind contactor respectively with the output main terminal U1, V1, W1 and U2, the V2 that connect motor, W2 is corresponding is connected.Second and third, the four tunnel identical with the first via, their three-phase main terminal A2, B2, C2,～A4, B4, C4, respectively through separately isolation reversing switch QS2, QS3, QS4 connect corresponding two contactor KM3 and KM4 ,～KM7 and KM8, with output main terminal U3, V3, W3 and U4, the V4, the W4 that connect motor ,～U7, V7, W7 and U8, V8, W8 correspondence are connected behind contactor.The start stop signal of leading control circuit QD01～QD08 of eight contactor KM1～KM8 and the signal of keyboard JP are sent to PLC, show by LCDs GOT.Control loop QD1～QD8 of eight contactor KM1～KM8 is connected with PLC, their starting, stops and protecting to be concentrated by PLC and finish.
First loop shown in Figure 8 or claim the operation principle of first group of major loop.The triple line main terminal A1, B1, C1 that meet ac power supply line 660V under the coal mine or 1140V are divided into two branch roads or claim two major loops through isolating reversing switch QS1:
1. first branch road: triple line is through AC vacuum contactor KM1; be connected with the triple line main terminal U1, V1, the W1 that connect motor respectively; triple line is with before main terminal U1, V1, W1 are connected; be connected with resistance capaciting absorpting circuit RC1, residual current protective unit LD1, and current transformer TA1, TA2, TA3 are housed.The output terminals A A1 of three current transformers, AA2 and AB1, AB2 and AC1, AC2; respectively with electric parameters transducer ABI1, ABI2, the corresponding connection of ABI3; the output terminals A V1 of three electric parameters transducers, AV2, AV3; signal is delivered to 2,4,6 ends of the analog-to-digital conversion module A/D1 of PLC; through analog-to-digital conversion; handled by PLC, and the setting current value of the overload of depositing with CPU, short circuit, open phase protection compares, PLC is by comparative result failure judgement type and send the command adapted thereto cutoff circuit.Residual current protective unit LD1 plays the effect of earth leakage search/lockout protection, detects when triple line is disconnected interchange 660V or 1140V voltage, and in a single day triple line is connected, and exchanges 660V or 1140V voltage and just disconnects residual current protective unit LD1 at once.Be connected in the normally closed contact KM1-4 of two contactor KM1 that connect between phase line and the residual current protective unit LD1 input 1 and the normally closed contact 1KA-1 of auxiliary relay 1KA, play a part to connect and disconnect leakage detecting circuit.The output 5,6 of residual current protective unit LD1 connects the input A23 and the 24V power end of optocoupler, and the input terminal X18 with PLC input module QX1 after light-coupled isolation is connected, 2 end ground connection.Residual current protective unit LD1 model LC-1140/660, Yan ore deposit electromechanical equipment manufactory product.
Control loop:, and partly form by the leading control circuit that starting button QA, stop button TA, relay 2KA form by normal opened contact KM1-2 and normally closed contact KM1-3, the PLC of master control transformer T1, auxiliary relay 1KA, scram button JT, electric blocking button TZ1, contactor.
Elementary B1, the C1 phase line that connects triple line of master control transformer T1, input AC 1140/660V voltage, its secondary two ends L1, N1 output AC 220V is for the control loop of each contactor provides supply voltage.
Contactor KM1 coil one end AB18 through electric blocking button TZ1, scram button JT, connects the L1 end of AC 220V power supply; The other end of contactor KM1 coil, A30 end through the normal opened contact 1KA-2 of auxiliary relay 1KA, connect the other end, the N1 end of AC 220V power supply, constitute the loop.Electric blocking button TZ1 is driver A, reversing switch QS1 is related with isolating, and when having only it to disconnect, isolating reversing switch QS1 could the turned position.Scram button JT is the shared emergency stop push button of unit switch, is installed on the Qianmen, presses its all contactor and all disconnects.The tie point of isolating reversing switch QS1 and scram button JT is L.The coil of auxiliary relay 1KA meets the lead-out terminal Y0 of PLC output module QY, by PLC control break-make.
The normal opened contact KM1-2 of contactor KM1: a termination 24V, the input of another termination optocoupler is connected with the input terminal X20 of the input module QX2 of PLC after light-coupled isolation.See Fig. 9.
The normally closed contact KM1-3 of contactor KM1: a termination 24V, the input of another termination optocoupler is connected with the input terminal X10 of the input module QX1 of PLC after light-coupled isolation.See Fig. 9.
Leading control circuit: i.e. this Anyuan control circuit, form by intrinsic safety control transformer T6, resistance R 1, relay 2KA, capacitor C1, diode D1, diode D2, starting button QA1, stop button TA1 etc.Elementary secondary two ends N1, the L1 that meets master control transformer T1 of control transformer T6, input AC 220V voltage, its secondary output AC10.5V is for leading control circuit provides operating voltage.A secondary end AB16 succeeds the A26 end of electrical equipment 2KA coil, the sustained diode 1 of relay 2KA coil ends A 26, A27 shunt capacitor C1, reversal connection through resistance R 1; Relay 2KA coil other end A27 through starting button QA1, stop button TA1 and the rectifier diode D2 of series connection successively, is connected to the other end AB17 of T6 level of control transformer.Wherein, starting button QA1 ends A 27, A28 are in parallel with the normal opened contact KM1-1 of contactor KM1.In addition, the two ends of the normal opened contact 2KA-1 of relay 2KA, a termination 24V, other end A25 connects the input of optocoupler, and the input terminal X28 with PLC input module QX1 is connected through light-coupled isolation.Among the figure, ib is the sign of mine intrinsic safety circuit, and PCB1 is the relay board of contactor KM1 control circuit.
2. second branch road is identical with first branch road: triple line is through AC vacuum contactor KM2; with the triple line main terminal U2 that connects motor; V2; W2 connects; triple line and main terminal U2; V2; before W2 connects with resistance capaciting absorpting circuit RC2; residual current protective unit LD2; and current transformer TB1 is housed; TB2; TB3; the output of current transformer and electric parameters transducer BBI1; BBI2; BBI3 connects; electric parameters transducer output BV1; BV2; BV3 delivers to signal the analog-to-digital conversion module A/D1 of PLC; through analog-to-digital conversion, handle and send command adapted thereto and control by PLC.The function of residual current protective unit LD2 is identical with LD1.Leading control circuit is made up of intrinsic safety control transformer T6, resistance R 2, relay 4KA, capacitor C2, diode D3, diode D4, starting button QA2, stop button TA2 etc.Control transformer T6 provide operating voltage.Starting button QA2 is in parallel with the normal opened contact KM2-1 of contactor KM2.The normal opened contact 4KA-1 one termination 24V of relay 4KA, other end B25 is connected with PLC input terminal X29 through light-coupled isolation.
3. voltage protection has temporary overvoltage, steady-state overvoltage and under-voltage protection.Temporary overvoltage is finished the protection task by resistance capaciting absorpting circuit RC1, RC2; steady-state overvoltage and under voltage protection are by sampling transformer T2 after electric parameters transducer WBV1 output; deliver to analog-to-digital conversion module A/D1; through analog-to-digital conversion; carry out calculation process by PLC, failure judgement is also sent the instruction cutoff circuit.The elementary two ends of sampling transformer T2 connect the two-phase of triple line through fuse FU3, FU4, secondaryly connect electric parameters transducer WBV1 input through fuse FU6.The output of electric parameters transducer WBV1 is V01 ,+24V, the 0th, its both ends of power.
4. the master control transformer T1 of supply voltage is provided for all contactor control loops, its elementary ends A 1, B1 connect the two-phase of triple line respectively through fuse FU1, FU1, promptly meet 1140V, and the tap B2 of 660V is arranged, the needs that can adapt to two electric pressures can change according to user's actual needs.Secondary 220V output: an end is the L1 end, and the other end connects the N1 end through fuse FU5.
Unique not the existing together in the major loop in other three loops and first loop is not have master control transformer T1 in the major loop.Other are all identical: all be to exchange 660V or 1140V triple line after isolating reversing switch, be divided into two branch roads, the composition of each branch road is identical with two branch roads in above-mentioned first loop with operation principle.
Each loop of this unit switch is relatively independent, and different major loops can be imported different three-phase alternating current supply power voltages simultaneously: 660V and 1140V.There is the break-make of isolation reversing switch control power supply separately in four loops, and are unaffected mutually.All there is a sampling transformer in each loop, sampled value is different because of the difference of each loop voltage value, after electric parameters transducer output separately, delivers to A/D module separately again, PLC carries out calculation process according to the value of different circuit, judges the virtual voltage situation and the failure condition in each loop.
The control principle of the PLC of the utility model unit switch shown in Figure 6.Programmable Logic Controller PLC selects the high-performance Q series of Mitsubishi for use, is furnished with 10.4 ' LCDs GOT, intrinsic safety keyboard JP, four analog-to-digital conversion module A/D1～A/D4.LCDs model A907GOT, provide by PLC producer.
1. secondary AC 220V output L1 and the N1 of the input termination master control transformer T1 of power supply: Switching Power Supply DY provide 24V operating voltage by Switching Power Supply DY.Voltage transformation module DC/DC provides 5V operating voltage for the intrinsic safety keyboard, and its output is 5V end and earth terminal GND, the output 24V, 0 of its input termination switch power supply DY.For the intrinsic safety that guarantees keyboard JP, leading control circuit requires and the safe handling of PLC, with being connected of PLC will be by light-coupled isolation.
2.PLC input module QX1, QX2:
1. the output 1～16 of each key of intrinsic safety keyboard JP, after light-coupled isolation, corresponding with binding post X0～XF respectively connection.The anodal termination 5V of keyboard JP, negative pole end ground connection GND.Each positive input terminal of optocoupler connect respectively current-limiting resistance R ' 1, R ' 2 ,～R ' 16.
2. the normally closed contact KM1-3～KM8-3 of each contactor through corresponding with the binding post X10～X17 respectively connection of light-coupled isolation, judges whether each branch road has contactor.
3. the output 5,6 of each branch road residual current protective unit LD1～LD8 through corresponding with the binding post X18～X1F respectively connection of light-coupled isolation, judges whether each branch road leaks electricity, output 5,6 interior contacts closures when leak current fault is arranged.Each residual current protective unit output 5, be A23～H23 termination optocoupler positive input terminal.
4. the normal opened contact KM1-2～KM8-2 of each contactor through corresponding with the binding post X20～X27 respectively connection of light-coupled isolation, judges whether each contactor starting is normal.
5. each contactor leading control circuit relay 2KA, 4KA ... normal opened contact 2KA-1, the 4KA-1 of 16KA ... 16KA-1 through corresponding with the binding post X28～X2F respectively connection of light-coupled isolation, starts each contactor.The A25 of each normal opened contact～H25 end connects the positive input terminal of each optocoupler respectively.Except that keyboard, the positive input terminal of each optocoupler through contact meet 24V, negative terminal connects 0; Positive output termination input terminal, negative terminal connect 0.
3.PLC analog-to-digital conversion module A/D1～A/D4: the input terminal 0,2,4,6,8 of modules A/D1, A, C respectively with the corresponding connection of electric parameters transducer WBV1, ABI1, ABI2, ABI3, BBI1, BBI2, output V01, the AV1 of BBI3, AV2, AV3, BV1, BV2, BV3 of the first via two branch roads, terminal 1,3,5 ... F meets 0V, and the FG end is earth terminal.Modules A/D2～A/D3 and the second tunnel～four tunnel connection and the like.
4.PLC output module QY: its eight lead-out terminal Y0～Y7, respectively with auxiliary relay 1KA, the 3KA of each contactor control loop, 5KA ... one end of 15KA coil is corresponding to be connected, T1 level of another termination master control transformer of each coil 220V power end N1, the common port COM of output module QY, meet 220V power end L1, constitute the loop that PLC output drives auxiliary relay.Normal opened contact 1KA-2, the 3KA-2 of each auxiliary relay, 5KA-2 ... 15KA-2, one end meets power end N1 jointly, other end A30～H30 respectively with the corresponding connection of coil of each contactor KM1～KM8, each contactor coil other end AB18 is jointly through electric blocking button TZ1, scram button JT, connect 220V power end L1 end, constitute the loop of auxiliary relay control contactor break-make.Under PLC output module QY drives, each auxiliary relay 1KA, 3KA ... the control that 15KA carries out be each contactor KM1～KM8 starting, stop.
Embodiment 2:
In the another kind of structure of mine explosion-suppression and intrinsic safety type unit switch shown in Fig. 3,4, be the structure that the main loop cabling ejector adopts cable connector.Except main loop cabling ejector and embodiment 1 were different, all the other inside and outside bilge constructions of flameproof cabinet were all identical with example 1.Left and right two wire connection cavities of casing respectively have six cable outlets, on the cabinet exterior screw is arranged around the outlet, by the screw that is installed on screw that counter flange 12 is fixing, replace horn mouth, cable connector 11 by screw attachment on counter flange 12, cable is introduced, is drawn by cable connector 11, can carry out corresponding installation according to customer requirements when dispatching from the factory.
Structure at the counter flange 12 of 11 usefulness of tie cable connector shown in Fig. 5,6.The one side is ring flange, connects firmly by screw with wire connection cavity outer wall cable outlet place, opposite side for band be fixedly connected the hole rectangular slab, connect firmly by screw with cable connector 11, be cylindric connecting portion between the both sides.
Except the foregoing description, also can change by following measure: 1. PLC has multiple model can supply to select for use.2. electric current, voltage sampling and protective circuit can adopt special-purpose protection assembly.3. the control loop of major loop and leading control circuit can have various deformation.4. the flameproof enclosure pattern can have multiple choices etc.
Using method and operation principle:
During use, get to the position of closing with isolating reversing switch 5, the back unit switch that powers on is in holding state, at first shows homepage, as shown in Figure 10 on LCDs 7; " ← " and " → " key by keyboard 9 carries out page turning, the chooser menu, as shown in Figure 11.Must carry out the setting of relevant parameter according to actual operating position before using, otherwise can't normally use.Enter parameter shown in Figure 12 by " setting " key page or leaf is set; Be used to enter each drive parameter by each numerical key page or leaf is set, as shown in figure 13.The parameter that Figure 13 illustrates the A driver is provided with page or leaf, fault inquiry etc.; Increase, subtract adjustment by what "+,-" key carried out parameter; " " " key uses for returning the upper level page.Drive parameter at Figure 12 is provided with in the page or leaf, the short circuit multiple be 8～10 times adjustable; Programmable delay is that 0～30S is adjustable; Rated current is that 10～400A or 10～200A are adjustable according to operational mode; Be that 1～6S is adjustable switching time; The fair taboo of starting is for permission and forbid dual mode.Operational mode has six kinds of patterns optional: 1. single loop control mode: each driver operational mode is made as " single control ", eight drivers are separate, can move simultaneously.2. unit single speed single loop control mode: each driver operational mode is made as " operation of unit single speed ", and A, C, four drivers of E, G can move simultaneously.3. multiloop program controlled mode: each driver operational mode is made as " program control ", and preceding four is one group, and back four is one group.4. two-shipper double speed double loop control mode: A or E driver operational mode are made as " head low speed ", B or F driver operational mode are made as " head at a high speed ", C or G driver operational mode are made as " tail low speed ", D or H driver operational mode are made as " tail at a high speed ", driver A, B, C, D are one group under this kind mode, and E, F, G, H are another group.5. be unit double speed control mode: A, C, E, G driver operational mode are made as " low speed ", and B, D, F, H driver operational mode are made as " at a high speed ", one group of one group of driver A and B, C and one group of D, E and one group of F, G and H.6. two-shipper low cruise control mode: A or E driver operational mode are made as " head low cruise ", and C or G driver operational mode are made as " tail low cruise ", and driver A, C are one group under this kind mode, and E, G are another group.After all settings are finished, can put into operation.Six kinds of operational mode uses capable of being combined, and can increase operational mode according to customer requirements.
Operation principle: the control loop with A driver first branch road is the example explanation.
1. the coil of pressing starting button QA1, the relay 2KA of leading control circuit among Fig. 8 gets electric, relay 2KA adhesive, its normal opened contact 2KA-1 closure; The binding post X28 of input module QX2 has the signal input among Fig. 9, promptly in the binding post Y0 of output module QY output signal, the coil of auxiliary relay 1KA is got, the auxiliary relay adhesive, its normal opened contact 1KA-2 is promptly closed, the wire loop of contactor KM1 is connected, contactor KM1 adhesive, connection major loop.The normal opened contact KM1-1 closure of the contactor in parallel, self-insurance with starting button QA1.2. ought press the stop button TA1 of leading control circuit, the coil losing electricity of relay 2KA, relay 2KA discharges, and its normal opened contact 2KA-1 disconnects, the binding post X28 no signal of input module QX2 input among Fig. 9, the lead-out terminal Y0 non-output signal of output module QY, the coil losing electricity of auxiliary relay 1KA, auxiliary relay 1KA discharges, and its normal opened contact 1KA-2 disconnects, the wire loop of contactor KM1 disconnects, and contactor KM1 discharges, disconnects major loop.
Claims (10)
1. a mine explosion-suppression and intrinsic safety type unit switch comprises flameproof enclosure and circuit part;
Flameproof enclosure comprises wire connection cavity, master control chamber; Wire connection cavity has cable to lead in/out device; There is the Qianmen in the master control chamber, is quick opening structure, and mechanical lock is arranged;
Circuit part comprises that two-way at least contains the major loop of contactor, and the control loop of each major loop;
Each major loop comprises isolates reversing switch, contactor, resistance capaciting absorpting circuit;
The control loop of major loop comprises master control transformer, scram button, electric blocking button, auxiliary relay, leading control circuit, and current sampling and protective circuit, voltage sampling and protective circuit, leakage protection circuit;
Leading control circuit comprises intrinsic safety control transformer, starting button, stop button, relay;
It is characterized in that: in the said circuit part PLC is arranged, and display screen (7), the keyboard (9) of PLC connection, display screen (7) and keyboard (9) are installed on the Qianmen in master control chamber; Major loop is 2～8 the tunnel, and the protective circuit of each major loop is connected with PLC with control loop; Concrete connection is as follows:
1. the auxiliary relay of each major loop control loop (1KA, 3KA ... coil 15KA) is respectively with the lead-out terminal (Y0～Y7) corresponding connection of PLC; The normal opened contact of these auxiliary relays (1KA-2,3KA-2 ... 15KA-2) respectively with contactor (the corresponding series connection of magnetic coil of KM1～KM8), and be in series with scram button (JT), electric blocking button (TZ1), be connected in the both ends of power (N1, L1) of control loop after the series connection;
2. in the leading control circuit of each major loop control loop, the relay that its coil is connected with starting button, stop button (2KA, 4KA ... normal opened contact 16KA) (2KA-1,4KA-1 ... 16KA-1), through optocoupler respectively with the corresponding input terminal of PLC (X28～X2F) corresponding connection;
3. ((KM1-2～KM8-2) is through optocoupler and the corresponding input wires terminal of PLC (X20～X27) corresponding connection for the normal opened contact of KM1～KM8) for the contactor of each major loop;
4. the output of the leakage protection circuit of each major loop control loop is through optocoupler and the corresponding input terminal of PLC (X18～X1F) corresponding connection;
5. the output of the current sampling of each major loop control loop and protective circuit is with the corresponding connection of the corresponding input terminal of PLC;
6. the output of the voltage sampling of each major loop control loop and protective circuit is with the corresponding connection of the corresponding input terminal of PLC;
7. the circuit output end of intrinsic safety keyboard (9), through optocoupler respectively with the corresponding input terminal of PLC (X0～XF) corresponding connection;
Above-mentioned 2., 4., 5., the 6. connection in the money, with the lead-out terminal of PLC (Y0～Y7) and auxiliary relay (1KA, 3KA ... 15KA) the join dependency of coil.
2. mine explosion-suppression and intrinsic safety type unit switch according to claim 1 is characterized in that: said flameproof enclosure has the isolating switch chamber, and the isolation reversing switch is arranged in the chamber; The contactor of each major loop, resistance capaciting absorpting circuit, leakage protection circuit, current sampling circuit are adorned respectively and are one, form independent driver (14); Each driver (14) is installed on the core frame in the master control chamber, is the drawing and pulling type structure; The connected mode of each driver main power source input, output is for pegging graft.
3. mine explosion-suppression and intrinsic safety type unit switch according to claim 2 is characterized in that: four isolation reversing switches (QS1～QS4), be connected every group of two major loops respectively with four groups of major loops is arranged in the said isolating switch chamber; That is: every isolation reversing switch is connected with two drivers (14).
4. mine explosion-suppression and intrinsic safety type unit switch according to claim 2 is characterized in that: said isolating switch chamber is positioned at top, master control chamber; Wire connection cavity divides left and right two, and left and right wire connection cavity lays respectively at master control chamber and arranged on left and right sides; The Qianmen is two.
5. mine explosion-suppression and intrinsic safety type unit switch according to claim 1, it is characterized in that: it is horn mouth and the dual-purpose form of cable connector that said wire connection cavity main loop cabling leads in/out device, that is: there is screw in the main loop cabling exit of wire connection cavity, this screw and the thread connector that is mated, can and horn mouth (1) connect, also can link with the counter flange (12) of tie cable connector (11).
6. mine explosion-suppression and intrinsic safety type unit switch according to claim 1 is characterized in that: said wire connection cavity, and the main terminal of major loop can be connected with the threephase cable of two kinds of electric pressure voltages simultaneously; The elementary terminals that two kinds of voltage correspondences are arranged of master control transformer (T1).
7. mine explosion-suppression and intrinsic safety type unit switch according to claim 6 is characterized in that: the voltage of said two kinds of electric pressures is 1140V and 660V.
8. mine explosion-suppression and intrinsic safety type unit switch according to claim 1, it is characterized in that: the contactor of said each major loop (normally closed contact of KM1～KM8) (KM1-3～KM8-3), through optocoupler and the corresponding input wires terminal of PLC (X10～X17) corresponding connection.
9. mine explosion-suppression and intrinsic safety type unit switch according to claim 1, it is characterized in that: said current sampling and protective circuit, form by current transformer (TA1, TA2, TA3), electric parameters transducer (ABI1, ABI2, ABI3), A/D modular converter and PLC; Voltage sampling and protective circuit are made up of sampling transformer (T2), electric parameters transducer (WBV1), A/D modular converter and PLC; Said leakage protection circuit be the residual current protective unit assembly (LD1～LD8), its input through the contactor normally closed contact of series connection (KM1-4～KM8-4), auxiliary relay normally closed contact (1KA-1,3KA-1 ... 15KA-1) be connected with one of triple line.
10. mine explosion-suppression and intrinsic safety type unit switch according to claim 1, it is characterized in that: said leading control circuit, by resistance (R1), relay (2KA, 4KA ... after coil 16KA), starting button (QA1), stop button (TA1), diode (D2) series connection, be connected to the secondary two ends of intrinsic safety control transformer (T6), relay (2KA, 4KA ... 16KA) coil two ends shunt capacitor (C1), fly-wheel diode (D1); Starting button (QA1) two ends and the contactor (self-insurance normal opened contact (KM1-1～KM8-1) in parallel of KM1～KM8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200204413U CN201051615Y (en) | 2007-04-11 | 2007-04-11 | Explosion insulated for mine and secure combined switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200204413U CN201051615Y (en) | 2007-04-11 | 2007-04-11 | Explosion insulated for mine and secure combined switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201051615Y true CN201051615Y (en) | 2008-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200204413U Expired - Fee Related CN201051615Y (en) | 2007-04-11 | 2007-04-11 | Explosion insulated for mine and secure combined switch |
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| Country | Link |
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| CN (1) | CN201051615Y (en) |
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Granted publication date: 20080423 Termination date: 20110411 |