CN107234427B - Busbar joint bolt tightens intelligent controlling device and method - Google Patents
Busbar joint bolt tightens intelligent controlling device and method Download PDFInfo
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- CN107234427B CN107234427B CN201710464589.4A CN201710464589A CN107234427B CN 107234427 B CN107234427 B CN 107234427B CN 201710464589 A CN201710464589 A CN 201710464589A CN 107234427 B CN107234427 B CN 107234427B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
Abstract
The present invention discloses a kind of busbar joint bolt in power transmitting device and tightens intelligent controlling device and method, four phase of busbar joint is respectively through corresponding lead and common guide wire jointing impedance collection unit input terminal, impedance acquisition unit output end is separately connected single-phase impedance comparing unit input terminal approximately equal with upper limit comparing unit and three phase connection impedance, single-phase impedance connects servo motor control unit through corresponding four relays with the output end of upper limit comparing unit, the approximately equal comparing unit output end of three phase connection impedance connects servo motor control unit through corresponding three relays；Resistance signal is converted to the power on/off for controlling relay coil after voltage signal is compared, motor is controlled with relay normally open normally closed switch, Motor torque is avoided to overload and make bolt stripped thread；After motor stalling, if it is determined that bolt is tightened and fault-free exists, and indicator light does not work all, if stalled due to detecting failure, corresponding indicator light can be bright.
Description
Technical field
The present invention relates to technical field of electric power, the especially device for screwing up of power transmitting device median generatrix track bolt.
Background technique
Bus is the important component of power transmitting device, however, bus during the installation process, connects between each unit
The reliability connect can be directly related to the safe operation of entire power supply-distribution system, and the especially size of busbar joint resistance can be to it
Working efficiency and service life directly affect.Connection is bolted at busbar joint, if bolt is not tightened or bus copper
Having the non-conductive impurity such as oxide layer between row all can cause junction connection resistance to increase, in addition, also can if casting technique is bad
Make copper bar surface irregularity, also result in impedance increase, being at this moment passed through electric current can be such that joint temperature rise increases, and will go out
Existing copper loss increases, electric energy loss increasing, insulating materials aging fastly, the hurried shortening of bus service life phenomena such as.Therefore, it is tightening
Carrying out detection to busbar joint resistance when busbar joint bolt is very important, this is even electric to the normal work of busbar joint
The normal operation of power transmission device has great significance.
Currently, Bolt Screw Down Method it is most common have torque tighten method, rotation angle tighten method and yield point control tighten
Method.China Patent No. is that rotation angle is utilized for a kind of Intelligent bolt tightening machine disclosed in 201020132713.0 document
The principle for tightening method is connect to control the operation of servo motor with servo motor by servo-driver by motion controller,
Servo motor is sequentially connected further through one end of retarder and transmission shaft, and the other end of transmission shaft is equipped with tappet head；It is being driven
Angular transducer and torque sensor are separately installed on axis, the angular transducer and torque sensor respectively with motion controller
Electrical connection makes motion controller combination pre-set programs control servo electricity to provide torque and swing information for motion controller
Machine work.Torque and angle when the bolt screwing machine can accurately control plain bolt rundown process, although can guarantee common spiral shell
Bolt tightens quality and efficiency, but for busbar joint bolt, it can not be solved and make by being only capable of accurately controlling torque and angle still
The problem of with the lost of life, because even having tightened busbar joint bolt, if thering is impurity or oxide to deposit between bus bar copper row
, or since casting technique problem makes copper bar surface irregularity all busbar joint impedance can be made to become larger, make after being passed through electric current
Connector temperature increases, and can make insulating materials aging, bus reduced service life.
Summary of the invention
The purpose of the present invention is to propose to a kind of busbar joint bolts to tighten intelligent controlling device and the controlling party of the device
Method detects busbar joint resistance when tightening busbar joint bolt, and busbar joint impedance is avoided to become larger or copper bar surface
The problem of increase of connector temperature caused by uneven and reduced service life.
Busbar joint bolt of the present invention tighten intelligent controlling device the technical solution adopted is that: tighten headgear in busbar joint
The output shaft of servo motor is fixedly and coaxially connected outside the head of bolt and through torque limiter, torque limiter is equipped with control limit
Bit switch, tetra- phase of A, B, C, N of busbar joint is respectively through corresponding conducting wire a, b, c, d and common conducting wire e jointing impedance
The input terminal of acquisition unit, the output end of impedance acquisition unit be separately connected single-phase impedance and upper limit comparing unit and
The input terminal of the approximately equal comparing unit of three phase connection impedance, single-phase impedance is with the output end of upper limit comparing unit through corresponding
Four relay KN、KA、KB、KCConnect servo motor control unit, the output of the approximately equal comparing unit of three phase connection impedance
End is through corresponding three relay KAB、KBC、KCAServo motor control unit is connected, servo motor control unit, which is separately connected, to be opened
Stop button and the servo motor, servo motor control unit passes through relay KRConnect the limit switch.
Further, the servo motor control unit includes current transformer L1, integrated transporting discharging A15With relay KI, open
Stop one termination power of button, the other end three branches in parallel, first branch road is sequentially connected in series current transformer L1Primary side
Coil, servo motor, relay KR、KINormally closed switch；Relay KN、KA、KB、KCNormally closed switch be all connected in parallel on relay KI
Normally closed switch both ends, current transformer second siding ring one end ground connection, another termination integrated transporting discharging A15Anti-phase input
End, resistance R are connected in parallel on the both ends of the second siding ring of current transformer；The resistance of third variable resistance is serially connected in+5V power supply
Between ground, slide plate connector meets integrated transporting discharging A15Non-inverting input terminal, integrated transporting discharging A15Output relay termination KICoil
One end, relay KIThe another of coil terminates at 5V power supply, relay KIOne diode of coil both ends parallel connection；Article 2 branch
On be sequentially connected in series relay KN、KA、KB、KC、KINormal open switch, relay KIThe other end of normal open switch be separately connected first
A indicator light LABWith relay KABThe series arm of normal open switch, second indicator light LBCWith relay KBCNormal open switch
Series arm, third lamp LCAWith relay KCANormal open switch series arm；Article 3 branch routing relay KRIt is normal
Switch, the 4th indicator light LN, relay KNNormally closed switch sequentially connect, the 5th indicator light LAWith relay KAIt is normal
The series arm of make and break pass, the 6th indicator light LBWith relay KBThe series arm of normally closed switch, the 7th indicator light LCWith
Relay KCThe series arm of normally closed switch be respectively connected in parallel on the 4th indicator light LNWith relay KNNormally closed switch
The both ends of series arm.
The busbar joint bolt tightens the control method of intelligent controlling device the technical solution adopted is that having following step
It is rapid:
A, the impedance R of impedance acquisition unit acquisition tetra- phase of busbar joint A, B, C, NA、RB、RC、RN, output electricity
Press uN、uA、uB、uC；As tappet head 1 tightens the increase of degree, impedance RN、RA、RB、RCIt is gradually reduced, output voltage uN、
uA、uB、uCAlso it is gradually reduced；
B, voltage uN、uA、uB、uCInput single-phase impedance and upper limit comparing unit, single-phase impedance is compared with the upper limit
Unit is by voltage uN、uA、uB、uCRespectively with the upper limit voltage u of settingT1It makes comparisons, if voltage uN、uA、uB、uCMore than or equal to upper
Voltage limit uT1, then corresponding relay KN、KA、KB、KCCoil no power, if instead voltage uN、uA、uB、uCLess than the upper limit
Voltage uT1, then corresponding relay KN、KA、KB、KCCoil be powered；Meanwhile voltage uA、uB、uCIt is input to three phase connection approximation
Comparison of equalization unit subtracts each other out of phase two voltage through three subtracters two-by-two, and three subtracters export corresponding voltage
u1、u2、u3, by voltage u1、u2、u3Respectively with setting voltage uT2It makes comparisons, if voltage u1、u2、u3More than or equal to setting voltage
uT2, then corresponding relay KAB、KBC、KCACoil be powered, conversely, then corresponding relay KAB、KBC、KCACoil it is obstructed
Electricity；Disconnect limit switch, relay KRCoil no power；
C, the armature supply of servo motor is converted voltage u by servo motor control unitI, and by voltage uIWith setting electricity
Press uT3It makes comparisons, if voltage uIMore than or equal to setting voltage uT3, relay KICoil is powered, conversely, relay KICoil is not
It is powered；
If D, relay KN、KA、KB、KC、KICoil all it is electric, servo motor stops operating, tappet head stopping tighten
Bus bolt；If relay KN、KA、KB、KC、KICoil also not all it is electric, if the torque of torque limiter be more than torque
The upper limit, limit switch SQ closure, relay KRCoil obtain electric, servo motor stops operating.
The present invention has the advantages that compared with existing methods and techniques
1, the present invention joined busbar joint impedance detection part in bolt screwing machine structure, use electronic circuit control skill
Resistance signal is directly converted to the power on/off that relay coil is controlled after voltage signal is compared by art, normal with relay
Open relay normally closed switch controls the start and stop of motor, and at low cost and fast response time, each controlling brancher is all arranged side by side
Judgement, the reaction time is fast, avoids Motor torque from overloading and make bolt stripped thread, so that the connection reliability of busbar joint mentions significantly
It is high.
2, the present invention added seven indicator lights in Serve Motor Control circuit, after motor stalling, if it is determining spiral shell
Bolt is tightened and fault-free exists, then indicator light does not work all；If it is the stalling occurred due to detecting failure, then accordingly refer to
Show that lamp can be bright, reminds maintenance man's guilty culprit position, and then facilitate maintenance, reduce the amount of labour of maintenance man.
Detailed description of the invention
Fig. 1 is the general structure schematic diagram that busbar joint bolt of the present invention tightens intelligent controlling device；
Fig. 2 is the structural block diagram of control circuit in Fig. 1；
Fig. 3 is the structural schematic diagram of Fig. 2 center tap impedance collection unit；
Fig. 4 is single-phase impedance and upper limit comparing unit structure and external schematic diagram in Fig. 2；
Fig. 5 is the approximately equal comparing unit structure of three phase connection impedance and external schematic diagram in Fig. 2；
Fig. 6 is servo motor control unit structure and external schematic diagram in Fig. 2.
The serial number and title of each component in attached drawing: 1. tappet heads；2. torque limiter；3. fixture nut；4. limiter is solid
Determine frame；6. torque adjusts bolt；7. motor fixing frame；8. servo motor；9. insulating barrier；10. cover board；11. bus nut；
12. connecting busbar；13. connector busbar；14. conductive clamp；15. busbar joint bolt；17. spring；28. circuit control box；29.
Tightening mechanism shell；SB. start-stop button；SQ. limit switch；LABFirst indicator light；LBCSecond indicator light；LCAThird
A indicator light；LNThe 4th indicator light；LAThe 5th indicator light；LBThe 6th indicator light；LCThe 7th indicator light；RP1?
One variable resistance；RP2The second adjustable resistance device；RP3Third variable resistance.
Specific embodiment
Referring to Fig. 1, for the busbar joint that bus is connected in the way of docking up and down, upper and lower dock busbar joint includes
The portions such as insulating barrier 9, cover board 10, bus nut 11, connection busbar 12, connector busbar 13, conductive clamp 14, bus bolt 15
Part.The busbar joint one shares four phases, is A phase, B phase, C phase and N phase respectively, and the upper lower contact busbar 13 of every phase passes through left and right two
Side connects busbar 12 and is connected, and makes current lead-through.The left and right side of connection busbar 12 is respectively fixed on one piece of insulating barrier 9, is led to
Cross the electric signal between the insulation every phase of sexual isolation of insulating barrier 9.The left and right sides of intermediate three insulating barriers 9 is respectively fixed with connection
Busbar 12, outermost two insulating barriers 9 in left and right are then that inside is fixed with connection busbar 12, outside is respectively pressed from both sides by one piece of cover board 10
Firmly, the middle busbar joint bolt 15 of the two cover plates 10 of left and right sides is fixedly connected, and is cooperated on busbar joint bolt 15 female
Line nut 11, it is by busbar joint bolt 15 and bus nut 11 that all insulating barriers 9, all connection busbars 12 is fixed
Together, to clamp upper lower contact busbar 13.A kind of head of busbar joint bolt 15 busbar joint through the invention
Bolt is tightened intelligent controlling device and is tightened, to make to connect the closely connection of busbar 12 and upper lower contact busbar 13, makes connection resistance
It is as small as possible.
The connector busbar 13 on this four phases top of the A phase, B phase, C phase and N phase of busbar joint is respectively connected by a conductive clamp
A corresponding conducting wire is connect, the connector busbar 13 of this four phases lower part of A phase, B phase, C phase with N phase is respectively connected by a conductive clamp
A piece common conducting wire.Wherein, what the connector busbar 13 on A phase top passed through a conductive clamp connection is conducting wire a, B phase top
Connector busbar 13 by the connection of conductive clamp be that the connector busbar 13 on conducting wire b, C phase top passes through a conductive clamp
Connection is conducting wire c, and what the connector busbar 13 on N phase top passed through a conductive clamp connection is conducting wire d, the connector busbar of lower part
13 connect a common conducting wire e by a conductive clamp respectively.
It includes a tappet head 1 that a kind of busbar joint bolt of the present invention, which tightens intelligent controlling device, tappet head 1
One end is opening, is open coaxial sleeve outside the head of busbar joint bolt 15, matches with busbar joint bolt 15, tappet head 1
Busbar joint bolt 15 can be driven to rotate when rotation.1 other end of tappet head is fixedly and coaxially connected (the i.e. safety connection of torque limiter 2
Axis device) one end, 2 other end of torque limiter is fixedly and coaxially connected the output shaft of servo motor 8, servo motor 8 made to pass through torque
Limiter 2 is connected with bolt tappet head 1.Tightening mechanism shell 29, servo are cased with outside servo motor 8 and torque limiter 2
Motor 8 is fixed on 29 inner wall of tightening mechanism shell by motor fixing frame 7, and torque limiter 2 is fixed on limit with fixed screw 3
On device fixed frame 4 processed, limiter fixed frame 4 is fixed on 29 inner wall of tightening mechanism shell.Torque is installed on torque limiter 2
Bolt 6 and limit switch SQ are adjusted, torque adjusts the upper torque limit that bolt 6 is used to adjust torque limiter 2, once servo motor
8 torque is more than the upper torque limit of setting, then limit switch SQ can export the DC signal of a 24V, this electric signal control
Servo motor 8 processed is closed.
Nailed circuit controls box 28 on the outer wall of tightening mechanism shell 29, and the inside of circuit control box 28 is control
Circuit, servo motor 8 introduce the control circuit inside circuit control box 28 by conducting wire.Conducting wire a, b of jointing busbar 13,
C, d, e are also introduced into the control circuit inside circuit control box 28.
Dress is there are three variable resistance and seven LED lights on 28 outer wall of circuit control box, and being respectively first can power transformation
Hinder device RP1, the second adjustable resistance device RP2, third variable resistance RP3With first indicator light LAB, second indicator light LBC,
Three indicator light LCA, the 4th indicator light LN, the 5th indicator light LA, the 6th indicator light LB, the 7th indicator light LC。
Start-stop button SB is installed on the outer wall of tightening mechanism shell 29, start-stop button SB is serially connected in 8 He of servo motor
Between circuit control box 28.Spring 17 is housed, only hand presses the start-stop button SB just meeting on start-stop button SB on start-stop button SB
It is connect with the terminal of servo motor 8, servo motor 8 is just made to access the control circuit inside circuit control box 28, once it puts
It is started button SB, start-stop button SB can be bounced off the terminal of servo motor 8 by spring 17, to disconnect servo motor 8
Power supply.
The control circuit inside circuit control box 28 referring to fig. 2, control circuit specifically include that impedance acquisition is single
First, single-phase impedance and upper limit comparing unit, the approximately equal comparing unit of three phase connection impedance and servo motor control unit.
The output end of impedance acquisition converting unit is separately connected single-phase impedance and upper limit comparing unit and three phase connection impedance
The input terminal of approximately equal comparing unit, single-phase impedance is compared with upper limit comparing unit and three phase connection impedance are approximately equal
The output end of unit connects servo motor control unit through relay, and servo motor control unit is also respectively connected with start-stop button SB
Coil and seven indicator light LAB、LBC、LCA、LN、LA、LB、LC.Mono- termination power of start-stop button SB, the other end is through servo motor
The first siding ring of current transformer in control unit connects servo motor 8.
The input terminal of impedance acquisition unit has five extraction wires, this five extraction wires are separately connected connector busbar
13 conducting wire a, b, c, d, e, for acquiring the A phase, B phase, C phase of connector busbar 13 and the impedance R of the every phase of N phaseA、RB、RC、
RN.It is, being the impedance R of N phase connector busbar 13 between conducting wire d and conducting wire eN, it is that A connects between conducting wire a and conducting wire e
Head impedance RA, it is B phase impedance R between conducting wire b and conducting wire eB, that between conducting wire c and conducting wire e is C phase impedance RC.It connects
Head impedance collection converting unit is by impedance RN、RB、RCAnd RAIt is converted into corresponding voltage uN、uA、uBAnd uCAnd it exports.So
Afterwards, by voltage uN、uA、uBAnd uCInput as single-phase impedance and upper limit comparing unit.Single-phase impedance and upper limit ratio
Output end compared with unit is separately connected four relay KN、KA、KB、KCCoil port, specific connection is referring to fig. 4.Four relays
Device KN、KA、KB、KCSwitch port be separately connected the input terminal of servo motor control unit, specific connection is referring to Fig. 6.Meanwhile
By three voltage u of impedance acquisition converting unit outputA、uBAnd uCAs the approximately equal comparing unit of three phase connection impedance
Input voltage, the output end of the approximately equal comparing unit of three phase connection impedance is separately connected three relay KAB、KBC、KCA's
Coil port, specific connection is referring to Fig. 5.Three relay KAB、KBC、KCASwitch port be separately connected Serve Motor Control list
The input terminal of member, specific connection is referring to Fig. 6.
Limit switch SQ one end connection+12V power supply in Fig. 1, the relay K in other end connection figure 2RCoil one
End, relay KRCoil the other end ground connection, relay KRCoil both ends parallel diode D1, diode D1Anode
Ground connection, cathode connect in relay KRCoil and limit switch SQ between, diode D1For preventing electric current from flowing counterflow through relay
KRCoil.In torque overload moment, limit switch SQ conducting, Continuity signal is used to control relay KRCoil be powered, in turn
Control corresponding relay KRSwitch, to control the start and stop of servo motor 8.
Single-phase impedance judges whether every phase impedance is less than the upper limit value of setting with upper limit comparing unit, then leads to
Cross relay KN、KA、KBAnd KCCoil power on/off so that control corresponding relay KN、KA、KBAnd KCSwitch.Three phase connection resistance
Resist approximately equal comparing unit to judge whether every two-phase joint impedance is approximately equal, then passes through control relay KAB、KBCAnd KCA
Coil power on/off so that control corresponding relay KAB、KBCAnd KCASwitch.
Impedance acquisition unit shown in Figure 3 mainly includes four current source IS1、IS2、IS3、IS4With four electricity
Press follower G1、G2、G3、G4, four current source IS1、IS2、IS3、IS4Output size of current it is identical, value I.With N phase connector
For impedance collection and conversion, integrated transporting discharging A1Inverting input terminal and A1Output end be connected, constitute voltage follower G1；Collection
At amplifier A1Non-inverting input terminal be connected with conducting wire d, current source IS1One end be connected to integrated transporting discharging A1Non-inverting input terminal with
Between conducting wire d, current source IS1It is another terminate between conducting wire e and ground, conducting wire e ground connection.According to the general of " empty short " and " void is disconnected "
It reads, integrated transporting discharging A1Input current be 0, that is, current source IS1Electric current I only lead to conducting wire d, then by N phase connector hinder
It is grounded after anti-by conducting wire e, forms a circuit.Voltage between conducting wire d and ground is exactly N phase impedance RNIt is passed through electric current I
Voltage u afterwardsd.Using the following feature of voltage follower, then voltage follower G1Output voltage uN=ud, and output voltage uN
It will not be influenced by rear circuit.A, the connection of B, C phase connector impedance collection and conversion circuit and N phase connector impedance collection and turn
The connection for changing circuit is identical, and only the current source of A, B, C phase is respectively IS2、IS3、IS4, voltage follower is G respectively2、G3、G4,
Constitute voltage follower G2、G3、G4Integrated transporting discharging be integrated transporting discharging A respectively2、A3、A4.Voltage follower G2Output voltage uA
Input voltage u equal to conducting wire aa, input voltage uaNamely A phase impedance is passed through the voltage u after electric current Ia；Voltage follow
Device G3Output voltage uBInput voltage u equal to conducting wire bb, input voltage ubAfter namely B phase impedance is passed through electric current I
Voltage ub；Voltage follower G4Output voltage uCInput voltage u equal to conducting wire cc, input voltage ucNamely C phase connector hinders
It is anti-to be passed through the voltage u after electric current Ic。
Single-phase impedance and upper limit comparing unit and the unit and four relay K referring to fig. 4N、KA、KBAnd KC's
The connection figure of coil, single-phase impedance and upper limit comparing unit mainly include four integrated transporting discharging A5、A6、A7、A8, four two
Pole pipe D2、D3、D4、D5With the first variable resistance RP1.First variable resistance RP1Resistance be serially connected in+5V power supply and ground
Between, the slide plate connector of variable resistance connects in integrated transporting discharging A simultaneously5、A6、A7、A8Inverting input terminal, that is, integrated transporting discharging
A5、A6、A7、A8Inverting input terminal be passed through identical voltage, be uT1, voltage uT1It can be by rotating the first variable resistance RP1
Slide plate change.Voltage uN、uA、uB、uCInput integrated transporting discharging A correspondingly respectively5、A6、A7、A8Non-inverting input terminal, integrate
Amplifier A5、A6、A7、A8Output end respectively correspondingly connect a relay KN、KA、KB、KCOne end of coil, relay KN、
KA、KB、KCThe other end of coil all connects on+5V power supply, diode D2It is connected in parallel on relay KNCoil both ends, diode D2Cathode
+ 5V is met, anode connects in integrated transporting discharging A5Output port and relay KNBetween coil, diode D3、D4、D5It is connected in parallel on respectively pair
The relay K answeredA、KB、KCCoil both ends, direction and diode D2It is identical.The specific works characteristic of circuit illustrates by taking N phase as an example
It is as follows: integrated transporting discharging A5、A6、A7、A8It is exactly simple voltage comparator, uNAs integrated transporting discharging A5Homophase input voltage, will
First variable resistance RP1The u obtained after adjustingT1As integrated transporting discharging A5Reverse inter-input-ing voltage, uNAnd uT1It is compared, one
Denier uN<uT1, then integrated transporting discharging A5Export low level, corresponding relay KNCoil be powered, and then make relay KNNormally closed open
Shutdown open, relay KNNormal open switch closure；If uN≥uT1, then integrated transporting discharging A5High level is exported, electric current is from diode D2
To upstream, relay KNCoil no power, therefore relay KNNormally closed switch still in closed state, relay KNIt is normal
It switchs in the open state.Similarly, once uA<uT1, then integrated transporting discharging A6Export low level, corresponding relay KACoil
It is powered, and then makes relay KANormally closed switch disconnect, relay KANormal open switch closure；Once uB<uT1, then integrated transporting discharging
A7Export low level, corresponding relay KBCoil be powered, and then make relay KBNormally closed switch disconnect, relay KB's
Normal open switch closure；Once uC<uT1, then integrated transporting discharging A8Export low level, corresponding relay KCCoil be powered, and then make
Relay KCNormally closed switch disconnect, relay KCNormal open switch closure.
The approximately equal comparing unit of three phase connection impedance shown in Figure 5 and three relays being connect with the unit
KAB、KBC、KCAThe connection figure of coil.The approximately equal comparing unit of three phase connection impedance mainly includes three subtracter S1、S2、S3、
Three integrated transporting discharging A12、A13、A14, three diode D6、D7、D8, several resistance and the second adjustable resistance device RP2.Resistance R1、
RA1、RA3、RB1、RB3、RC1、RC3Resistance value it is identical, resistance R2、RA2、RA4、RB2、RB4、RC2、RC4Resistance value it is identical.Connector resistance
Three voltage u of anti-acquisition unit outputA、uB、uCRespectively accordingly input three subtracter S1、S2、S3.Subtracter S1Comprising integrated
Amplifier A9, integrated transporting discharging A9Inverting input terminal and uAResistance R has been concatenated between portA1, resistance RA1With integrated transporting discharging A9Reverse phase
Resistance R is connected between input terminalA2One end, resistance RA2Another terminate at integrated transporting discharging A9Output end, integrated transporting discharging A9
Non-inverting input terminal and uBResistance R has been concatenated between portA3, resistance RA3With integrated transporting discharging A9Non-inverting input terminal between be connected to
Resistance RA4One end, resistance RA4The other end ground connection, thus constitute subtracter S1.Subtracter S2By integrated transporting discharging A10And electricity
Hinder RB1、RB2、RB3、RB4It constitutes, subtracter S3By integrated transporting discharging A11And resistance RC1、RC2、RC3、RC4It constitutes.Subtracter S2With subtract
Musical instruments used in a Buddhist or Taoist mass S3Structure and connection and subtracter S1It is similar, only by resistance RA1Change R into respectivelyB1And RC1, resistance RA2、RA3、RA4With
Integrated transporting discharging A9Also similar replacement.Subtracter S2Anti-phase input terminate uB, homophase input termination uC；Subtracter S3Anti-phase input
Terminate uC, homophase input termination uA.Subtracter S1、S2、S3Output be voltage u respectively1、u2、u3, voltage u1、u2、u3Respectively as
Integrated transporting discharging A12、A13、A14Anti-phase input.The second adjustable resistance device RP2Resistance be serially connected between+5V power supply and ground, slide
Strip terminal connects in integrated transporting discharging A simultaneously12、A13、A14Non-inverting input terminal, that is, A12、A13、A14Non-inverting input terminal be passed through phase
Same voltage is uT2, voltage uT2It can be by rotating the second adjustable resistance device RP2Slide plate change.Integrated transporting discharging A12、A13、A14
Output end meet a corresponding relay K respectivelyAB、KBC、KCAOne end of coil, relay KAB、KBC、KCAThe other end of coil
It all connects on+5V power supply, diode D6It is connected in parallel on relay KABCoil both ends, diode D6Cathode meets+5V, and anode connects integrated
Amplifier A12Output port and relay KABBetween coil, diode D7、D8It is connected in parallel on relay K respectivelyBC、KCACoil both ends,
Direction and diode D6It is identical.
When the approximately equal comparing unit of three phase connection impedance works, first through three subtracter S1、S2、S3By out of phase two
A voltage subtracts each other two-by-two according to formula, exports corresponding three voltage u1、u2、u3, then by three voltage u1、u2、u3Respectively with set
Constant voltage uT2It makes comparisons.Specific working principle is described as follows so that A phase is compared with B as an example: out of phase two voltage uAWith
uBRespectively as subtracter S1Reverse inter-input-ing voltage and homophase input voltage, through subtracter S1It obtains subtracting each other resultThen by the voltage u of output1As integrated transporting discharging A12Reverse inter-input-ing voltage, by the second adjustable resistance device
RP2The u obtained after adjustingT2As integrated transporting discharging S12Homophase input voltage, u1And uT2It is compared, once u1≥uT2, then collect
At amplifier A12Export low level, corresponding relay KABCoil be powered, and then make corresponding relay KABNormal open switch close
It closes；If u1<uT2, then integrated transporting discharging A12High level is exported, electric current is from diode D6To upstream, relay KABCoil it is obstructed
Electricity, therefore relay KABNormal open switch still in off-state.Similarly, voltage uBAnd ucThrough subtracter S2It obtainsOnce u2≥uT2, then integrated transporting discharging A13Export low level, corresponding relay KBCCoil be powered, into
And make relay KBCNormal open switch closure.Similarly, voltage uAAnd ucThrough subtracter S3It obtainsOnce u3
≥uT2, then integrated transporting discharging A14Export low level, corresponding relay KCACoil be powered, and then make relay KCANormally opened open
It closes and closes.
Referring to the servo motor control unit in Fig. 6 and the start-stop button SB being connect with the unit, servo motor 8, several
Relay and seven indicator lights.Servo motor control unit mainly includes a current transformer L1, an integrated transporting discharging A15, one
A relay KI.Mono- termination+12V power supply of start button SB, the other end three branches in parallel, first branch road have been connected electricity
Current transformer L1First siding ring, servo motor 8, relay KRNormally closed switch and relay KINormally closed switch, relay
KINormally closed switch the other end ground connection.Relay KNNormally closed switch, relay KANormally closed switch, relay KBIt is normally closed
Switch, relay KCNormally closed switch be all individually connected in parallel on relay KINormally closed switch both ends.Current transformer L1It is secondary
Lateral coil one end ground connection is another to terminate at integrated transporting discharging A15Inverting input terminal, resistance R is connected in parallel on current transformer L1It is secondary
The both ends of lateral coil.Third variable resistance RP3Resistance be serially connected between+5V power supply and ground, third variable resistance RP3's
Slide plate connector connects in integrated transporting discharging A15Non-inverting input terminal, that is, integrated transporting discharging A15Non-inverting input terminal be passed through voltage uT3, voltage
uT3It can be by rotating third variable resistance RP3Slide plate change.Integrated transporting discharging A15Output terminate at relay KICoil
One end, relay KIThe other end of coil all connects on+5V power supply, diode D9It is connected in parallel on relay KICoil both ends, two poles
Pipe D9Cathode meets+5V, and anode connects in integrated transporting discharging A15Output port and relay KIBetween coil.Article 2 branch road, after
Electric appliance KNNormal open switch, relay KANormal open switch, relay KBNormal open switch, relay KCNormal open switch and after
Electric appliance KINormal open switch be sequentially connected on Article 2 branch road, relay KIThe other end of normal open switch be separately connected
Two indicator light LBCWith relay KBCThe series arm of normal open switch, first indicator light LABWith relay KABNormally opened open
The series arm of pass, third lamp LCAWith relay KCANormal open switch series arm, relay KAB、KBC、KCAIt is normally opened
Switch other end ground connection.Article 3 branch road, by relay KRNormal open switch, the 4th indicator light LN, relay KNIt is normally closed
Switch is sequentially cascaded, relay KNNormal open switch the other end ground connection.5th indicator light LAWith relay KAIt is normal
The series arm of make and break pass, the 6th indicator light LBWith relay KBThe series arm of normally closed switch, the 7th indicator light LCWith
Relay KCThe series arm of normally closed switch be respectively connected in parallel on the 4th indicator light LNWith relay KNNormally closed switch
The both ends of series arm.
Current transformer L1First siding ring be connected in the armature circuit of servo motor 8, current transformer L1Output electricity
Flow I2=k*I1, wherein k is the rated current ratio of current transformer, I1It is the armature supply of servo motor 8.Current transformer L1
The electric current I of output2Resistance R is flowed through, according to " void is disconnected " concept, integrated transporting discharging A15Input current be 0, therefore electric current I2It flows only through
Resistance R is without flowing to integrated transporting discharging A15, current signal is converted into voltage uISignal, then voltage uIAs integrated transporting discharging A15's
Reverse inter-input-ing voltage；By third variable resistance RP3The u obtained after adjustingT3As integrated transporting discharging A15Homophase input voltage, will
Voltage uIAnd uT3It is compared, once uI≥uT3, then integrated transporting discharging A15Export low level, relay KICoil is powered, and then makes
Relay KINormally closed switch disconnects；If uI<uT3, then integrated transporting discharging A15High level is exported, electric current is from diode D9To upstream, after
Electric appliance KICoil no power, therefore relay KINormally closed switch is still in closed state.Due to the torque and electric current of servo motor 8
It is directly proportional, therefore the torque of servo motor 8 can be limited by control electric current.Due to uI=I2* R=k*I1* R, that is,
uIWith armature supply I1It is directly proportional, therefore limit uIThe torque of servo motor 8 can be limited.Control lower torque limit be in order to avoid
Every phase impedance is already less than setting value, the stalling of servo motor 8 but the case where bus bolt 15 is also not completely tightened.
Relay switch break-make situation in Fig. 6 is as follows: when start-stop button SB is pressed, connecting Serve Motor Control list
Member, the on-off of first branch control servo motor 8, Article 2 branch control first, second, third indicator light LAB、
LBC、LCALight on and off, for showing whether A, B, C phase impedance are approximately equal；Article 3 branch controls the 4th, the 5th,
Six, the 7th indicator light LN、LA、LB、LCLight on and off, for showing whether N, A, B, C phase impedance are less than setting value.First
In branch, when torque does not overload, relay KRNormally closed switch be in closed state, connect relay KRNormally closed switch
Five small branches in separately included relay KN、KA、KB、KC、KINormally closed switch, wherein any one normally closed switch closes
It closes, then servo motor 8 remains in operation；It is only simultaneously switched off there are five normally closed switch, servo motor 8 can just stop operating.Work as torque
When overload, relay KRNormally closed switch just will disconnect, regardless of five normally closed switch, servo motor 8 can all stop operating.
In Article 2 branch, five relay KN、KA、KB、KC、KINormal open switch, be only closed at there are five normal open switch, first
A, second, these three indicator lights of third LAB、LBC、LCAIt could be bright.That is, only servo motor 8 stalls really, and
A, the impedance of B, C three-phase be both less than just need to detect after setting value A, B, C three-phase impedance it is whether approximately equal.
If five relay KN、KA、KB、KC、KINormal open switch be all closed, relay KABIt is closed, then first indicator light LABIt is bright；
Relay KBCIt is closed, then second indicator light LBCIt is bright；Relay KCAIt is closed, then third indicator light LCAIt is bright.Three indicator lights
Light on and off are independent of each other, and judge simultaneously.The road connection of Article 3 branch is relay normally open switch KROnce servo motor 8
Torque is more than upper torque limit, relay normally open switch KRIt will be closed, branch conducting, servo motor 8 also stops operating at this time,
Because of the relay normally closed switch K of first branch roadRIt is in an off state, as relay normally open switch KRWhen closure, once inspection
N phase impedance is measured still no less than setting value, KNNormally closed switch closure then the 4th indicator light LNIt is bright.Similarly, if A phase
Impedance is still no less than setting value, KANormally closed switch closure then the 5th indicator light LAIt is bright；B phase impedance still no less than
Setting value, KBNormally closed switch closure then the 6th indicator light LBIt is bright；C phase impedance is still no less than setting value, KCNormally closed open
It closes and closes then the 7th indicator light LCIt is bright.It is non-interference between this four branches, it is bright to can be any number indicator light.
Since the resistance of busbar joint is very small, the present invention connects current source on busbar joint, and resistance signal is turned
It is detected for voltage signal.Then using voltage comparator compare surveyed voltage whether be less than setting voltage come limit connector hinder
It is anti-, if it is less than then illustrating that the contact resistance between every phase bus meets the requirements, then utilize subtracter and voltage comparator ratio
Whether more every phase impedance is approximately equal, if not approximately equal, then need to stop bolt and tightens operation, check not approximate
It is whether problematic between equal two-phase busbar.The torque limiter 2 installed between servo motor 8 and tappet head 1, once it arrives
Requirement has not been reached yet in contact resistance between torque limit but busbar joint, it is also desirable to which operation is tightened in stopping, checking and does not have also
There is the problem of certain phase for meeting contact resistance requirement or a few phase busbars.Whether the problem of main investigation is that have between bus bar copper row
Impurity or oxide exist, or whether have the problem of casting technique causes bus bar copper row surface irregularity.In addition, in order to true
It protects busbar joint to have tightened, joined the detection of armature supply, torque value is speculated by the size of armature supply, because directly
The armature supply of galvanic electricity machine is directly proportional to torque, if resistance has reached required value, but torque does not reach minimum torque also and wants
It asks, then continues to execute and tighten operation, until reaching lower torque limit, to ensure that bus bolt 15 is tightened.Tightening control dress of the present invention
The specific control method set includes following step:
Step 1: by the first, second, third variable resistance RP1、RP2、RP3Respective setting value is slided into respectively, respectively
Setting value be depending on busbar joint model.Torque limiter 2 is resetted, 1 set of tappet head is pushed up in bus bolt 15
Portion, eight conductive clamps 14 are clipped in the corresponding position of connector busbar 13.
Step 2: by+5V and+12V plant-grid connection, control circuit starts to act at this time, and the acquisition of impedance acquisition unit is female
The impedance R of the A phase, B phase, C phase of wire terminal and the every phase of N phaseA、RB、RC、RN, by current source IS1、IS2、IS3、IS4Electric current point
Corresponding connection resistance R is not passed through by conductive clampN、RA、RB、RC, impedance is made to be converted to corresponding voltage ud、ua、ub、
uc, voltage ud、ua、ub、ucCorrespondingly respectively as voltage follower G1、G2、G3、G4Homophase input voltage, through voltage with
With device G1、G2、G3、G4Respectively obtain output voltage uN、uA、uB、uC, and voltage uN、uA、uB、uCValue respectively with voltage ud、ua、
ub、ucValue it is identical.As tappet head 1 tightens the increase of degree, impedance RN、RA、RB、RCIt is gradually reduced, output voltage uN、
uA、uB、uCAlso it is gradually reduced.
Output voltage uN、uA、uB、uCInput single-phase impedance and upper limit comparing unit, respectively as integrated transporting discharging A5、
A6、A7、A8Homophase input voltage, adjust the first variable resistance RP1To upper limit voltage uT1, as integrated transporting discharging A5、A6、A7、
A8Reverse inter-input-ing voltage, by homophase input voltage respectively with the upper limit voltage u of settingT1It makes comparisons, for determining single-phase connector
Whether impedance is less than setting value, if integrated transporting discharging A5、A6、A7、A8Homophase input voltage, that is, voltage uN、uA、uB、uCGreater than etc.
In upper limit voltage uT1, then high level is exported, at this time corresponding diode D2、D3、D4、D5Conducting, corresponding relay KN、KA、KB、
KCNo power；, whereas if voltage uN、uA、uB、uCLess than upper limit voltage uT1, export low level, relay KN、KA、KB、KCIt is logical
Electricity.At this point, busbar joint bolt 15 is also in releasing orientation, the connection busbar of N, A, B, C phase since tappet head 1 is not tightened also
Also in maximum state, impedance value is also maximum in gap between 12 and connector busbar 13, therefore the voltage u detectedN、
uA、uB、uCGreater than upper limit voltage uT1, integrated transporting discharging A5、A6、A7、A8All export high level, diode D2、D3、D4、D5Conducting, and
Relay KN、KA、KB、KCCoil no power, therefore, relay KN、KA、KB、KCNormally closed switch closure, normal open switch open.
In output voltage uN、uA、uB、uCWhile input single-phase impedance and upper limit comparing unit, voltage uA、uB、uC
It is input to the approximately equal comparing unit of three phase connection, voltage uA、uB、uCRespectively as subtracter S1、S2、S3Anti-phase input electricity
Pressure, uB、uC、uARespectively as subtracter S1、S2、S3Homophase input voltage, to respectively obtain output voltage u1、u2、u3, electricity
Press u1、u2、u3It is respectively connected to integrated transporting discharging A12、A13、A14Inverting input terminal, while as integrated transporting discharging A12、A13、A14It is same
Mutually input.By voltage u1、u2、u3Respectively with the second adjustable resistance device RP2Adjust obtained setting voltage uT2It makes comparisons, is used to true
Whether the impedance for determining A, B, C phase is approximately equal, not approximately equal, and the voltage value after subtracting each other can be bigger.When comparing,
If u1More than or equal to uT2, then integrated transporting discharging A12Export low level, relay KABCoil be powered, relay KABNormal open switch
Closure, normally closed switch are opened；, whereas if voltage u1Less than uT2, then integrated transporting discharging A12Export high level, relay KABLine
Enclose no power, diode D6Conducting.Similarly, if voltage u2More than or equal to uT2, then integrated transporting discharging A13Export low level, relay
KBCCoil be powered, relay KBCNormal open switch closure；If voltage u3More than or equal to uT2, then integrated transporting discharging A14Export low electricity
It is flat, relay KCACoil be powered, relay KCANormal open switch closure.At the same time, it is in limit switch SQ and disconnects shape
State, therefore relay KRCoil no power, relay KRNormal open switch closure, normal open switch are opened.At the same time, armature electricity
Flow I1It is zero, therefore current transformer L1Exporting electric current is zero, thus voltage uI<uT3, integrated transporting discharging A15Export high level, electric current
From diode D9To upstream, relay KICoil no power, therefore relay KINormally closed switch is still in closed state.
Step 3: press start-stop button SB, by step 2 it is known that relay in Fig. 6, with the same branch road of servo motor 8
Device KR、KN、KA、KB、KCNormally closed switch closure, therefore servo motor 8 starts turning, and drives tappet head 1 to rotate, starts to tighten mother
Wire terminal bolt 15.
While tightening busbar joint bolt 15, armature electric current I1Input current transformer L1, current transformer L1
The electric current I of output2Resistance R is flowed through, current signal is converted into voltage uISignal, then voltage uIAs integrated transporting discharging A15It is anti-
Phase input voltage；By third variable resistance RP3To setting value u after adjustingT3, as integrated transporting discharging A15Homophase input voltage,
Integrated transporting discharging A15By voltage uIWith setting value uT3It makes comparisons, for limiting armature supply size, to limit torque.If reverse phase
Input voltage uILess than homophase input voltage uT3, i.e. uI<uT3, then high level, diode D are exported9Conducting, relay KINo power；
Otherwise output low level, relay KICoil is powered.Armature supply I1It is to start from scratch to be gradually increased, therefore work as and detect uI<
uT3, then integrated transporting discharging A15High level is exported, electric current is from diode D9To upstream, relay KICoil no power, therefore relay
KINormally closed switch is still in closed state.At this point, in Fig. 6, relay KN、KA、KB、KC、KINormal open switch all in opening state,
Therefore first, second, third indicator light LAB、LBC、LCAAll do not work；Relay KRNormal open switch in opening state, because
This 4th, the 5th, the 6th, the 7th indicator light LN、LA、LB、LCAll do not work.
Step 4: as tappet head 1 tightens the increase of degree, connection resistance RN、RA、RB、RCIt can be gradually reduced, and then can lead
Cause output voltage uN、uA、uB、uCReduce.Once detecting voltage uN<uT1, then integrated transporting discharging A5Export low level, relay KN's
Coil is powered, and then makes the relay K in Fig. 6NNormally closed switch disconnect, relay KNNormal open switch closure；Once detecting
Voltage uA<uT1, then integrated transporting discharging A6Export low level, relay KACoil be powered, and then make the relay K in Fig. 6AIt is normal
Make and break shutdown open, relay KANormal open switch closure；Once detecting voltage uB<uT1, then integrated transporting discharging A7Low level is exported,
Relay KBCoil be powered, and then make the relay K in Fig. 6BNormally closed switch disconnect, relay KBNormal open switch closure；
Once detecting uC<uT1, then integrated transporting discharging A8Export low level, relay KCCoil be powered, and then make the relay in Fig. 6
KCNormally closed switch disconnect, relay KCNormal open switch closure.
If detecting voltage u1≥uT2, then integrated transporting discharging S12Export low level, relay KABCoil be powered, in turn
Make the relay K in Fig. 6ABNormal open switch closure；If detecting voltage u1<uT2, then integrated transporting discharging S12High level is exported,
Electric current is from diode D6To upstream, relay KABCoil no power, therefore the relay K in Fig. 6ABNormal open switch still in
Off-state.If detecting voltage u2≥uT2, then integrated transporting discharging S13Export low level, relay KBCCoil be powered, in turn
Make the relay K in Fig. 6BCNormal open switch closure；If detecting voltage u3≥uT2, then integrated transporting discharging S14Low level is exported,
Relay KCACoil be powered, and then make the relay K in Fig. 6CANormal open switch closure.
If detecting voltage uI≥uT3, then integrated transporting discharging A15Export low level, relay KICoil be powered, and then make after
Electric appliance KINormally closed switch disconnects.
Step 5: as relay KN、KA、KB、KC、KICoil all electric, then relay KN、KA、KB、KC、KINormally closed open
Pass opens simultaneously, at this point, showing output voltage uN、uA、uB、uCRespectively less than upper limit voltage uT1, then the branch where servo motor 8
It disconnects, servo motor 8 stops operating, and bus bolt 15 is tightened in the stopping of tappet head 1.
Meanwhile relay KN、KA、KB、KC、KINormal open switch be all closed, at this time if relay KABCoil obtain it is electric,
Then relay KABNormal open switch closure, first indicator light LABIt is bright；If relay KBCCoil obtain electric, then relay KBC
Normal open switch closure, second indicator light LBCIt is bright；If relay KBCCoil obtain electric, then relay KBCNormal open switch
Closure, third indicator light LBCIt is bright.
, whereas if relay KN、KA、KB、KC、KICoil also not all it is electric, show output voltage uN、uA、uB、uCGreatly
In equal to upper limit voltage uT1, first, second, third indicator light LAB、LBC、LCAIt all will not be bright.At this point, if torque is super
Cross upper torque limit, limit switch SQ closure, relay KRCoil obtain electric, relay KRNormally closed switch disconnect, servo motor 8
Branch disconnect, servo motor 8 stops operating, and bus bolt 15 is tightened in the stopping of tappet head 1.Meanwhile relay KRNormally opened open
It closes and closes, at this time if relay K in Fig. 6NCoil also not electric, then relay KNNormally closed switch be still closed, the 4th
Indicator light LNIt is bright；If relay KACoil also not electric, then relay KANormally closed switch be still closed, the 5th instruction
Lamp LAIt is bright；If relay KBCoil also all electric, then relay KBNormally closed switch be still closed, the 6th indicator light LB
It is bright；If relay KCCoil also not electric, then relay KCNormally closed switch be still closed, the 7th indicator light LCIt is bright.
When servo motor 8 has stopped operating, the light on and off situation of seven indicator lights is recorded, then decontrols start button SB,
Busbar is checked according to seven indicator lights.Seven LED lights are all that there are positions for prompting problem, if seven indicator lights are all
It does not work, then illustrates that busbar joint has been tightened.If first indicator light LABIt is bright, then illustrate the not approximate phase of two phase of impedance of A, B connector
Deng after disconnecting start button SB, the problem of inspection between not approximately equal A, B two-phase busbar joint；If second instruction
Lamp LBCIt is bright, then illustrate that B, C two-phase joint impedance is not approximately equal, after disconnecting start button SB, checks not approximately equal B, C two
The problem of between phase busbar joint；If third indicator light LCAIt is bright, then illustrate that C, A two-phase joint head impedance is not approximately equal,
After disconnecting start button SB, the problem of inspection between not approximately equal C, A two-phase busbar joint.First, second, third
A indicator light LAB、LBC、LCALight on and off be independent of each other, and first, second, third indicator light LAB、LBC、LCAWhen bright, the
Four to the 7th indicator light LN、LA、LB、LCIt will not be bright.If the 4th indicator light LNIt is bright, illustrate that N phase impedance is larger,
Through be more than setting value, disconnect start button SB after, check N phase busbar joint the problem of；If the 5th indicator light LAIt is bright, then A
The problem of phase impedance is larger, checks A phase connector；If the 6th indicator light LBBright, then B phase impedance is larger, then examines
The problem of looking into B phase busbar joint；If the 7th indicator light LCBright, then C phase impedance is larger, then checks C phase busbar joint
The problem of.4th to the 7th indicator light LN、LA、LB、LCLight on and off do not influence, the 4th to the 7th indicator light LN、LA、
LB、LCWhen bright, first to third indicator light LAB、LBC、LCAIt will not be bright.
Claims (8)
1. a kind of busbar joint bolt tightens intelligent controlling device, headgear is tightened outside the head of busbar joint bolt and through torque
Limiter is fixedly and coaxially connected the output shaft of servo motor, and torque limiter is equipped with control limit switch, it is characterized in that: bus
Tetra- phase of A, B, C, N of connector is respectively defeated through corresponding conducting wire a, b, c, d and common conducting wire e jointing impedance collection unit
Enter end, the output end of impedance acquisition unit is separately connected single-phase impedance and upper limit comparing unit and three phase connection impedance
The input terminal of approximately equal comparing unit, single-phase impedance is with the output end of upper limit comparing unit through corresponding four relays
KN、KA、KB、KCServo motor control unit is connected, the output end of the approximately equal comparing unit of three phase connection impedance is through corresponding three
A relay KAB、KBC、KCAServo motor control unit is connected, servo motor control unit is separately connected start-stop button and described
Servo motor, servo motor control unit pass through relay KRConnect the limit switch.
2. busbar joint bolt according to claim 1 tightens intelligent controlling device, it is characterized in that: the servo motor control
Unit processed includes current transformer L1, integrated transporting discharging A15With relay KI, one termination power of start-stop button, other end parallel connection three
Branch, first branch road are sequentially connected in series current transformer L1First siding ring, servo motor, relay KR、KINormally closed open
It closes；Relay KN、KA、KB、KCNormally closed switch be all connected in parallel on relay KINormally closed switch both ends, current transformer it is secondary
Lateral coil one end ground connection, another termination integrated transporting discharging A15Inverting input terminal, resistance R is connected in parallel on the secondary side line of current transformer
The both ends of circle；The resistance of third variable resistance is serially connected between+5V power supply and ground, and slide plate connector meets integrated transporting discharging A15Same phase
Input terminal, integrated transporting discharging A15Output relay termination KIOne end of coil, relay KIAnother termination+5V power supply of coil,
Relay KIOne diode of coil both ends parallel connection；Article 2 branch road is sequentially connected in series relay KN、KA、KB、KC、KINormally opened open
It closes, relay KIThe other end of normal open switch be separately connected first indicator light LABWith relay KABNormal open switch series connection
Branch, second indicator light LBCWith relay KBCThe series arm of normal open switch, third lamp LCAWith relay KCAIt is normally opened
The series arm of switch；Article 3 branch routing relay KRNormal open switch, the 4th indicator light LN, relay KNNormally closed open
Pass is sequentially connected, the 5th indicator light LAWith relay KAThe series arm of normally closed switch, the 6th indicator light LBAnd relay
KBThe series arm of normally closed switch, the 7th indicator light LCWith relay KCNormally closed switch series arm respectively simultaneously
It is associated in the 4th indicator light LNWith relay KNNormally closed switch series arm both ends.
3. busbar joint bolt according to claim 1 tightens intelligent controlling device, it is characterized in that: the impedance is adopted
Collecting unit includes four identical current sources of output size of current and four integrated transporting discharging A1、A2、A3、A4, the one of each current source
End be connected to the non-inverting input terminal of a corresponding integrated transporting discharging between conducting wire a, b, c, d of corresponding phase, current source it is another
It terminates between conducting wire e and ground, each integrated transporting discharging A1、A2、A3、A4Inverting input terminal be connected with output end, each integrated fortune
Put A1、A2、A3、A4Accordingly export a voltage uA、uB、uC、uN。
4. busbar joint bolt according to claim 3 tightens intelligent controlling device, it is characterized in that: the single-phase connector resistance
It is anti-to include four integrated transporting discharging A with upper limit comparing unit5、A6、A7、A8, four diode and first variable resistances,
The resistance of one variable resistance is serially connected between+5V power supply and ground, and the slide plate connector of variable resistance connects integrated at four simultaneously
Amplifier A5、A6、A7、A8Inverting input terminal, the voltage u of impedance acquisition unit outputN、uA、uB、uCOne is a pair of respectively
Input four integrated transporting discharging A with answering5、A6、A7、A8Non-inverting input terminal, four integrated transporting discharging A5、A6、A7、A8Output end each one
An one correspondingly connected relay KN、KA、KB、KCOne end of coil, relay KN、KA、KB、KCAnother termination+5V electricity of coil
Source, the both ends of an each relay coil diode in parallel.
5. busbar joint bolt according to claim 3 tightens intelligent controlling device, it is characterized in that: the three phase connection hinders
Resisting approximately equal comparing unit includes three subtracter S1、S2、S3, three integrated transporting discharging A12、A13、A14, three diodes and one
A the second adjustable resistance device, the voltage u of the impedance acquisition unit outputA、uB、uCThree subtractions are inputted correspondingly
Device S1、S2、S3, subtracter S1、S2、S3The voltage u of output1、u2、u3It is integrated transporting discharging A respectively12、A13、A14Anti-phase input,
The resistance of two variable resistances is serially connected between+5V power supply and ground, and slide plate connector connects in integrated transporting discharging A12、A13、A14Same phase
Input terminal, integrated transporting discharging A12、A13、A14Output end respectively correspondingly connect relay KAB、KBC、KCAOne end of coil, relay
Device KAB、KBC、KCAAnother termination+5V power supply of coil, each relay KAB、KBC、KCAThe both ends of a coil diode in parallel.
6. a kind of busbar joint bolt as claimed in claim 2 tightens the control method of intelligent controlling device, it is characterized in that tool
There are following steps:
A, the impedance R of impedance acquisition unit acquisition tetra- phase of busbar joint A, B, C, NA、RB、RC、RN, output voltage uN、
uA、uB、uC；As tappet head tightens the increase of degree, impedance RN、RA、RB、RCIt is gradually reduced, output voltage uN、uA、uB、uC
Also it is gradually reduced；
B, voltage uN、uA、uB、uCInput single-phase impedance and upper limit comparing unit, single-phase impedance and upper limit comparing unit
By voltage uN、uA、uB、uCRespectively with the upper limit voltage u of settingT1It makes comparisons, if voltage uN、uA、uB、uCMore than or equal to above rationing the power supply
Press uT1, then corresponding relay KN、KA、KB、KCCoil no power, if instead voltage uN、uA、uB、uCLess than upper limit voltage
uT1, then corresponding relay KN、KA、KB、KCCoil be powered；Meanwhile voltage uA、uB、uCIt is approximately equal to be input to three phase connection
Comparing unit subtracts each other out of phase two voltage through three subtracters two-by-two, and three subtracters export corresponding voltage u1、u2、
u3, by voltage u1、u2、u3Respectively with setting voltage uT2It makes comparisons, if voltage u1、u2、u3More than or equal to setting voltage uT2, then right
The relay K answeredAB、KBC、KCACoil be powered, conversely, then corresponding relay KAB、KBC、KCACoil no power；Make to limit
Switch disconnects, relay KRCoil no power；
C, the armature supply of servo motor is converted voltage u by servo motor control unitI, and by voltage uIWith setting voltage uT3
It makes comparisons, if voltage uIMore than or equal to setting voltage uT3, relay KICoil is powered, conversely, relay KICoil no power；
If D, relay KN、KA、KB、KC、KICoil all it is electric, servo motor stops operating, tappet head stopping tighten bus
Bolt；If relay KN、KA、KB、KC、KICoil also not all it is electric, at this time if the torque of torque limiter be more than torque
The upper limit, limit switch SQ closure, relay KRCoil obtain electric, servo motor stops operating.
7. busbar joint bolt according to claim 6 tightens the control method of intelligent controlling device, it is characterized in that: step
In D, if the torque of torque limiter is less than upper torque limit, relay KRNormally closed switch closure, relay KN、KA、KB、
KC、KIFive normally closed switch in any one normally closed switch closure, servo motor remains in operation, and five normally closed switch are disconnected simultaneously
It opens, servo motor stops operating.
8. busbar joint bolt according to claim 7 tightens the control method of intelligent controlling device, it is characterized in that: servo
When motor stalls, if seven indicator lights all do not work, busbar joint has been tightened；If first indicator light LABIt is bright, then
A, the impedance of B two-phase joint is not approximately equal, second indicator light LBCBright then B, C two-phase joint impedance is not approximately equal, third
Indicator light LCABright then C, A two-phase joint impedance is not approximately equal；If the 4th indicator light LNBright then N phase impedance is big, the
Five indicator light LABright then A phase impedance is big, the 6th indicator light LBBright then B phase impedance is big, the 7th indicator light LCIt is bright
Then C phase impedance is big.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710464589.4A CN107234427B (en) | 2017-06-19 | 2017-06-19 | Busbar joint bolt tightens intelligent controlling device and method |
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| CN201710464589.4A CN107234427B (en) | 2017-06-19 | 2017-06-19 | Busbar joint bolt tightens intelligent controlling device and method |
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| CN107234427B true CN107234427B (en) | 2019-02-01 |
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| CN108519516B (en) * | 2018-04-16 | 2020-01-24 | 江苏大学 | Bus joint micro-ohm impedance online detection method and device |
| CN110103171A (en) * | 2019-04-15 | 2019-08-09 | 无锡智动力机器人有限公司 | A method of the control fastening torque of bolt based on impedance control principle |
| CN110441043B (en) * | 2019-08-15 | 2020-12-15 | 西京学院 | Motor characteristic-based sliding wire detection system and method for electric lock screw tool |
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| CN2276864Y (en) * | 1997-02-21 | 1998-03-25 | 杨炳贤 | Electric bolt dismounting tool able to adjust torque |
| LT5674B (en) * | 2008-11-11 | 2010-08-25 | Vilniaus Gedimino technikos universitetas | Method and equipment of control of detail connection by threaded joint |
| CN101540440B (en) * | 2009-04-24 | 2011-05-18 | 江苏中天电气有限公司 | Bus duct joint structure |
| CN104280599B (en) * | 2014-10-29 | 2017-02-15 | 国网四川省电力公司电力科学研究院 | Three-phase voltage signal detection alarm circuit |
| CN106291716A (en) * | 2015-05-12 | 2017-01-04 | 宽仕工业股份有限公司 | Bolt gets loose and detects device and detection method thereof |
| CN206248724U (en) * | 2016-08-19 | 2017-06-13 | 成都智朴思互联科技有限公司 | The impedance test system and mancarried device of a kind of USB cable |
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Effective date of registration: 20210512 Address after: No. 508, GANGLONG Road, Yangzhong Economic Development Zone, Zhenjiang City, Jiangsu Province, 212200 Patentee after: Jiangsu Yineng Bus Co.,Ltd. Address before: No. 508, riverside industrial concentration zone, Yangzhong Economic Development Zone, Zhenjiang City, Jiangsu Province Patentee before: JIANGSU YINONE ELECTRIC Co.,Ltd. |
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Address after: No. 508, GANGLONG Road, Yangzhong Economic Development Zone, Zhenjiang City, Jiangsu Province, 212200 Patentee after: Eaton bus (Jiangsu) Co.,Ltd. Address before: No. 508, GANGLONG Road, Yangzhong Economic Development Zone, Zhenjiang City, Jiangsu Province, 212200 Patentee before: Jiangsu Yineng Bus Co.,Ltd. |
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