CN109703989A - A kind of reliable continuous conveyor system auto-tensioning control system and its control method - Google Patents
A kind of reliable continuous conveyor system auto-tensioning control system and its control method Download PDFInfo
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Abstract
The invention discloses a kind of reliable continuous conveyor system auto-tensioning control system and its control methods, solve car slipping existing for existing belt feeder tensioning technology, break belt, are tensioned the problems such as unstable.The present invention includes the winch main motor being arranged on tensioning winch, cable drum is equipped with the transmission of winch main motor, the tensioning wirerope matched with tensioning frame is wound on cable drum, tension sensor is provided on tensioning wirerope, winch main motor and tension sensor are connected with control unit, band-type brake is provided in the drive shaft of winch main motor, the band-type brake motor of driving folding is provided on band-type brake, band-type brake motor is connected by band-type brake relay with described control unit, control unit is connected with frequency converter, it is matched with frequency converter and is provided with resistance box, winch main motor is connected by frequency converter control unit, rotary encoder is also connected between winch main motor and control unit.The present invention controls simple, low in cost, stable and reliable operation.
Description
Technical field
The present invention is related to continuous conveyor system auto-tensioning technical field, particularly relate to a kind of reliable continuous conveyor system from
Dynamic tensioning control system and its control method.
Background technique
With flourishing for Chinese shield cause, also more and more, the continuous skin of application of hard rock mole (abbreviation TBM)
Deslagging device with machine as TBM is indispensable component part.In TBM tunneling process, continuous conveyor system can be with
The propulsion of TBM host and constantly extend, realize the purpose continuously slagged tap.Generally there are two types of types for automatic takeup: weight is certainly
Dynamic tensioning and frequency conversion auto-tensioning.The systematic comparison of frequency conversion auto-tensioning is complicated, generally comprises tensioning winch, braking brake, steel wire
Rope drum, frequency converter, controller, man-machine interface etc..
General frequency conversion auto-tensioning divides two types: motor continues the auto-tensioning system and motor intermittence work of sex work
The auto-tensioning system of work.Motor continues the auto-tensioning system of sex work, is by motor continuous service to belt feeder one
The dynamic power of duration balances the tension of belt feeder, to reach a kind of dynamic balance state.The mode dynamic responding speed
It is good, it is a closed loop control mode, needs to increase encoder to motor, to realize control closed loop.Such as: draw Huang, draw Song Lianxu
Belt feeder auto-tensioning system is all this mode.The auto-tensioning system of motor intermittent work is exactly motor only in reality
Value and setting value have and can just work when deviation, and band-type brake holds motor tightly when zero deflection, and motor and winch remain static.The two phase
Comparatively, the auto-tensioning system of motor intermittent work more easily controls, reliability is higher, is more energy-saving and environmentally friendly.
Through retrieving, existing applying date 2016.06.13, the utility model patent application No. is CN205675691U are disclosed
A kind of magneto variable frequency tensioning device, including tensioning winch；Tensioning winch is equipped with winding wheel and driving winding wheel rotation
Driving mechanism, be wound with rope on winding wheel；Rope is equipped with the tension sensor for incuding rope tension；Winding wheel is logical
Speed reducer is crossed to connect with magneto；Frequency converter is electrically connected with magneto, brake and tension sensor respectively, and frequency converter is used
In the rotation direction and start and stop of control magneto, and by control brake to the driver between magneto and speed reducer
Structure carries out band-type brake；It is also used to receive the rope tension power of tension sensor induction, and according to the rope of tension sensor induction
Clamp force, control magneto operation, is adjusted the tensile force of rope.Above-mentioned technical proposal mainly solves frequency conversion and opens automatically
Tight device long range application effect is bad and the slow problem of dynamic responding speed.
In addition having the applying date is 2015.07.07, the utility model patent application No. is CN204945745U, discloses one
The power supply of kind mine variable-frequency tensioning winch control system, the technical solution is connected by explosion-proof filter reactor with explosion-proof frequency converter
Winch variable-frequency motor, winch variable-frequency motor pass through tensioning by liquid braking device connection winch transmission device, winch transmission device
Roller connection tensioning trolley, explosion-proof frequency converter are connected by explosion-proof PLC control cabinet and are controlled, and explosion-proof PLC control cabinet has been bi-directionally connected collection
Control center, explosion-proof PLC control cabinet connection control have liquid braking device, speed probe, tension sensor and pressure transmitter.It should
Technical solution gives a kind of Electric Control Design thinking of flame-proof converter automatic takeup.
The technical solution of two above utility model patent all solves the problems, such as belt tension, but with the hair of technology
Exhibition, two above technical solution manifested shortcoming, mechanical engagement, in terms of lack reliability,
And both there is the technical problem of use cost height, stability difference.
Summary of the invention
For the deficiency in above-mentioned background technique, the present invention proposes a kind of reliable continuous conveyor system auto-tensioning control system
System and its control method solve the technical problem of existing continuous conveyor system auto-tensioning system use cost height, stability difference.
The technical scheme of the present invention is realized as follows: a kind of reliable continuous conveyor system auto-tensioning control system, packet
Tensioning winch is included, winch main motor is provided on tensioning winch, is equipped with cable drum, steel with the transmission of winch main motor
It is wound with the tensioning wirerope matched with the tensioning frame of continuous conveyor system on cord reel, is tensioned on wirerope and is provided with pulling force
Sensor, winch main motor and tension sensor are connected with control unit, are arranged in the drive shaft of the winch main motor
There is band-type brake, the band-type brake motor of driving folding is provided on band-type brake, band-type brake motor passes through band-type brake relay and described control unit phase
Even, speed reducer is provided between the drive shaft and cable drum of winch main motor, control unit includes PLC slave station, and pulling force passes
Sensor, band-type brake relay are connected with PLC slave station, and PLC slave station is connected with frequency converter, are arranged between winch main motor and frequency converter
There is resistance box, winch main motor is connected by frequency converter with PLC slave station, and rotary encoder is provided on winch main motor, is rotated
Encoder is connected with PLC slave station.
Reliable continuous conveyor system auto-tensioning control system according to claim 1, it is characterised in that: the drawing
For force snesor at least provided with two, two tension sensors are temperature-compensating tension sensor.In taut band (loose band) process
In always exist very hightension, it is highly important for preventing the car slipping phenomenon of shutdown process.In the operation of continuous conveyor system
In the process, winch main motor can be in low rotation speed large torque state for a long time, therefore frequency converter is preferably Schneider ATV71 series
Heavily loaded frequency converter, the zero-speed under closed loop mode that this frequency converter may be implemented expires torque, and it is existing that this characteristic can greatly reduce car slipping
As.In addition, taut band (loose band) process of continuous belt is similar to promotion (decline) process of crane, in conjunction with frequency converter Lifting Modules
Control of the formula to band-type brake can accomplish not car slipping completely.In addition, when loose band, winch main motor will under the traction of belt tension
In generating state, especially belt is longer during last driving, this phenomenon can become apparent from.Therefore, it configures in this design
In addition the resistance box to match with frequency converter also acts certain so that the excessively high energy consumption on bus be realized to fall
Braking action.
Further, for the tension sensor at least provided with two, two tension sensors are temperature-compensating pulling force
Sensor.Under the action of being chronically at alternate stress due to tension sensor, the probability of happening of failure is increased.Therefore two are used
A sensor carrys out redundancy, to reduce the probability of equipment downtime.Due to constructing tunnel weather is different, winter weather cold,
Lower temperature can produce bigger effect tension sensor, control accuracy decline be caused, using the drawing with temperature-compensating
Force snesor, it is ensured that the tension sensor accuracy that signal exports when temperature change is larger.Even if tension sensor is lost
After effect, it can also expire the characteristic of torque by frequency converter zero-speed periodically to judge current tension value, can be carried out with tension setting value
Rough relatively progress pine band (taut band) acts, and then alarms to host computer, waits to be repaired.
Further, tensioning frame includes belt steering frame, first group of belt steering cylinder is provided on belt steering frame, with skin
Band bogie is relatively set with belt tension vehicle, is provided on belt tension vehicle and first group of belt steering cylinder corresponding second
Group belt steering cylinder, the belt of continuous conveyor system are wrapped between first group of belt steering cylinder and second group of belt steering cylinder, institute
The one end for stating tensioning wirerope is fixed on belt tension vehicle.
Further, the belt tension vehicle includes tensioning vehicle hold-down support, slides and is provided on tensioning vehicle hold-down support
It is tensioned vehicle mobile holder, second group of belt steering cylinder setting is on tensioning vehicle mobile holder.
Further, idler wheel, setting above the tensioning vehicle hold-down support are provided with below the tensioning vehicle mobile holder
There are the guide rail matched with idler wheel, the convenience for effectively enhancing the tensioning of continuous belt and loosening.
Further, the tensioning winch include jinny main motor winch support and with tensioning vehicle walker it is opposite
The fixed pulley bracket answered is provided with the first fixed pulley group on fixed pulley bracket, be tensioned on vehicle mobile holder be provided with it is first fixed
The corresponding second fixed pulley group of pulley blocks, tensioning wirerope be back and forth wrapped in the first fixed pulley group and the second fixed pulley group it
Between, tensioning wirerope multiply be connected in parallel between the first fixed pulley group and the second fixed pulley group, fully ensured that traction can
By property.
Further, wire rope reverse frame, wire rope reverse frame are provided between the fixed pulley bracket and winch support
On be provided with commutation fixed pulley, tensioning wirerope is from cable drum successively by commutation fixed pulley, the connection of the first fixed pulley group
To the second fixed pulley group, the position of tensioning wirerope can be easily adjusted.
A kind of control method of reliable continuous conveyor system auto-tensioning control system, including tensioning control process, parking
Control process and pine band control process, the PLC slave station are connected with control flow, key in setting to PLC slave station by control flow
Force value, band-type brake dropping current strength and band-type brake closed path value, the tensioning control process the following steps are included:
Step 1: when the tension that PLC slave station receives tension sensor detection is less than the lower limit value of setting tension value, PLC slave station
Frequency converter work is controlled, PLC slave station exports exciting current pre-excitation to winch main motor by frequency converter, and winch main motor is built
Output torque electric current after vertical magnetic flux, until torque current reaches band-type brake dropping current strength；
Step 2: keeping the torque current in step 1 constant, while the sending of PLC slave station is opened a sluice gate to instruct, and controls band-type brake relay
Closure, band-type brake motor obtain it is electric after control band-type brake open；
Step 3: after band-type brake fully opens, PLC slave station control frequency converter exports the torque current being gradually increased, and controls winch
Main motor starts to accelerate to rotate forward operation, and winch main motor is made to be quickly obtained the big torque in taut band direction.
The parking toll process includes following work step:
Step 4: when the tension that the PLC slave station receives tension sensor detection reaches setting tension value, the control of PLC slave station becomes
Frequency device reduces torque current, remains unchanged after torque current drops to band-type brake closed path value；
Step 5: after torque current drops to band-type brake closed path value, PLC slave station issue immediately band-type brake instruction, control band-type brake after
Electric appliance disconnects, control band-type brake closure after band-type brake motor power loss；
Step 6: the PLC slave station issues time delay command, and band-type brake is waited to be closed completely；
Step 7: after the band-type brake in step 6 is closed completely, the torque that the control frequency converter output of PLC slave station gradually decreases is electric
Stream realizes stably stop until dropping to zero.
When the tension that tension sensor detects is greater than the upper limit of setting tension value, PLC slave station starts to start pine band control
System.Frequency converter is same set of parameter setting with tensioning control process in this workflow.But when belt tension is very big, pine
A car slipping phenomenon in short-term is had with moment.In an open loop mode, low-frequency range (3HZ or less) is it cannot be guaranteed that output is full for frequency converter
Torque guarantees not car slipping.Therefore, guarantee frequency converter work in closed loop mode by increasing rotary encoder in the design
Under, realize that zero-speed expires torque to guarantee not car slipping.It is described pine band control process the following steps are included:
Step 8: when the tension that the PLC slave station receives tension sensor detection reaches the setting tension value upper limit, PLC slave station control
Frequency converter processed reduces torque current, remains unchanged after torque current drops to band-type brake closed path value；
Step 9: after torque current drops to band-type brake closed path value, PLC slave station issue immediately band-type brake instruction, control band-type brake after
Electric appliance disconnects, control band-type brake closure after band-type brake motor power loss；
Step 10: the PLC slave station issues time delay command, and band-type brake is waited to be closed completely；
Step 11: after the band-type brake in step 10 is closed completely, the torque that the control frequency converter output of PLC slave station gradually decreases is electric
Stream realizes stably stop until dropping to zero；
Step 12: after the docking process in step 8, PLC slave station controls frequency converter work, and PLC slave station passes through change
Frequency device to the output of winch main motor and contrary exciting current pre-excitation in step 1, establish defeated after magnetic flux by winch main motor
Torque current out, until torque current reaches band-type brake dropping current strength；
Step 13: keeping the torque current in step 9 constant, while the sending of PLC slave station is opened a sluice gate to instruct, and controls band-type brake relay
Device closure, band-type brake motor obtain it is electric after control band-type brake open；
Step 14: after the band-type brake in step 13 fully opens, PLC slave station control frequency converter exports the torque being gradually reduced
Electric current, control winch main motor start low speed and reverse operation, continuous conveyor system are made slowly to reduce tension；
Step 15: when the tension value in step 14 reaches setting tension value, PLC slave station issues band-type brake instruction, control immediately
Band-type brake relay processed disconnects, control band-type brake closure after band-type brake motor power loss；
Step 10 six: the PLC slave station issues time delay command, and band-type brake is waited to be closed completely；
Step 10 seven: after the band-type brake in step 10 six is closed completely, PLC slave station control frequency converter exports the torque gradually decreased
Electric current realizes stably stop until dropping to zero.
The present invention not only controls simple and low in cost, but also stable and reliable operation, the existing belt feeder of effective solution
Car slipping present in tensioning technology breaks belt, is tensioned the problems such as unstable.In addition, the present invention is in tensioning control process, parking
Control process and pine are with can be realized stable adjusting in control process, but when belt tension is very big, pine band moment meeting
There is a car slipping phenomenon in short-term.In an open loop mode, low-frequency range (3HZ or less) is it cannot be guaranteed that export full torque to protect for frequency converter
Demonstrate,prove not car slipping.Therefore, guarantee that frequency converter work under closed loop mode, realizes zero-speed by increasing rotary encoder in invention
Expire torque to guarantee not car slipping.In addition, taut band (loose band) process of continuous belt is similar to promotion (decline) process of crane,
Control in conjunction with frequency converter Lifting scheme to band-type brake can accomplish not car slipping completely.
Detailed description of the invention
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in describing below to embodiment makees letter
Singly introduce, it should be apparent that, drawings in the following description are only some embodiments of the invention, skill common for this field
For art personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is control principle drawing of the invention；
Fig. 2 is the control flow chart of taut band of the present invention and loose band；
Fig. 3 is left view structural representation of the invention；
Fig. 4 is overlooking structure diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1, a kind of reliable continuous conveyor system auto-tensioning control system, as shown in Figure 3 and Figure 4, including tensioning
Winch 1 is provided with winch main motor 2 on tensioning winch 1, is equipped with cable drum 3 with the transmission of winch main motor 2, twists
Speed reducer 11 is provided between the drive shaft and cable drum 3 of car owner's motor 2.As shown in Figure 1, being wound on cable drum 3
There is the tensioning wirerope 5 matched with the tensioning frame 4 of continuous conveyor system, is tensioned on wirerope 5 and is provided with tension sensor 6, draw
Force snesor 6 can real-time monitoring tensioning wirerope 5 tension value, can learn the tensioning state of tensioning frame 4 indirectly.Winch main motor
2 and tension sensor 6 be connected 8 with control unit, the tension value that control unit 8 can be monitored according to tension sensor 6,
The operating status of real-time control winch main motor 2, and then realize tensioning process control, pine band process control and docking process control
System.
It is provided with band-type brake 7 in the drive shaft of the winch main motor 2, the band-type brake motor of driving folding is provided on band-type brake 7
7-1, band-type brake motor 7-1 are connected by band-type brake relay 7-2 with described control unit 8.Described control unit 8 includes PLC slave station
8-1, tension sensor 6 and band-type brake relay 7-2 are connected with PLC slave station 8-1, and PLC slave station 8-1 is connected with frequency converter 8-2, twist
Resistance box 8-3 is provided between car owner's motor 2 and frequency converter 8-2.When pine band operation, the main electricity of winch under the traction of belt tension
Machine 2 will be in generating state, and especially belt is longer during last driving, this phenomenon can become apparent from.Therefore, in this implementation
It is configured with the resistance box 8-3 to match with frequency converter 8-2 in example, to realize the excessively high energy consumption on bus to fall, separately
Certain braking action is also acted outside.
The winch main motor 2 is connected by frequency converter 8-2 with PLC slave station 2-1, and PLC slave station is controlled by frequency converter 8-2
The operating status of winch main motor 2.Rotary encoder 8-4, rotary encoder 8-4 and PLC slave station are provided on winch main motor 2
8-1 be connected, rotary encoder 8-4 can real-time monitoring winch main motor 2 revolving speed, tach signal is then transmitted to PLC slave station
8-1, PLC slave station 8-1 control frequency converter 8-2 according to tach signal and convey torque current to winch main motor 2, form one completely
Closed-loop control system.Meanwhile the torque current that PLC slave station 8-1 is exported according to frequency converter 8-2, real-time control band-type brake relay
The movement of 7-2, and then it is capable of the operating status of synchronously control band-type brake motor 7-1, it can be according to the operation shape of winch main motor 2
The unlatching and closure of state synchronously control band-type brake 7.
Very hightension is always existed during taut band (loose band), it is very heavy for preventing the car slipping phenomenon of shutdown process
It wants.In the operational process of continuous conveyor system, winch main motor 2 can be in low rotation speed large torque state for a long time, therefore become
Frequency device 8-2 is preferably the heavily loaded frequency converter of Schneider ATV71 series, this frequency converter may be implemented zero-speed under closed loop mode and completely turn
Square, this characteristic can greatly reduce car slipping phenomenon.In addition, taut band (loose band) process of continuous belt is similar to the promotion of crane
(decline) process, the control in conjunction with frequency converter 8-2 Lifting scheme to band-type brake 7 can accomplish not car slipping completely.
Embodiment 2, a kind of reliable continuous conveyor system auto-tensioning control system, the tension sensor 6 are at least arranged
There are two, two tension sensors 6 are temperature-compensating tension sensor.Since tension sensor 6 is chronically at alternate stress
Under the action of, increase the probability of happening of failure.Therefore carry out redundancy using two sensors, to reduce the probability of equipment downtime.
Due to constructing tunnel weather is different, winter weather cold, and lower temperature can generate larger shadow to tension sensor 6
It rings, control accuracy decline is caused, using the tension sensor with temperature-compensating, it is ensured that tension sensor 6 is in temperature
The accuracy that signal exports when changing greatly.Even if also passable frequency converter 8-2 zero-speed completely turns after tension sensor 6 fails
The characteristic of square periodically judges current tension value, compared with can carrying out roughly with tension setting value, carries out pine band (taut band) and acts,
Then it alarms to host computer, waits to be repaired.
The other structures of the present embodiment are same as Example 1.
Embodiment 3, a kind of reliable continuous conveyor system auto-tensioning control system, the tensioning frame 4 include belt steering
Frame 4-1,4-1 is provided with first group of belt steering cylinder 4-2 on belt steering frame, is relatively set with belt tension with belt steering frame
Vehicle 9 is provided with second group belt steering cylinder 9-2 corresponding with first group of belt steering cylinder 4-2 on belt tension vehicle 9.Continuously
The belt 10 of belt feeder is wrapped between first group of belt steering cylinder 4-2 and second group of belt steering cylinder 9-2, the tensioning steel wire
One end of rope 5 is fixed on belt tension vehicle 9.Tensioning wirerope 5 can be tensioned and loosen under the drive of winch main motor 2, into
And being tensioned wirerope 5 can drive 9 opposed belts bogie 4-1 of belt tension vehicle mobile, and then realize tensioning to belt 10 and
Loosen.
The other structures of the present embodiment are identical as embodiment 1 or 2.
Embodiment 4, a kind of reliable continuous conveyor system auto-tensioning control system, the belt tension vehicle 9 include tensioning
Vehicle hold-down support 9-1 is tensioned sliding on vehicle hold-down support 9-1 and is provided with tensioning vehicle mobile holder 9-3, and second group of belt turns
To cylinder 9-2 setting on tensioning vehicle mobile holder 9-3.Under the drive of tensioning wirerope 5, tensioning vehicle mobile holder 9-3 can be
It is relatively moved on tensioning vehicle hold-down support 9-1, can guarantee the stability for being tensioned and loosening process.
The other structures of the present embodiment are same as Example 3.
Embodiment 5, a kind of reliable continuous conveyor system auto-tensioning control system, under the tensioning vehicle mobile holder 9-3
Side is provided with idler wheel 9-4, is provided with the guide rail 9-5 matched with idler wheel 9-4 above the tensioning vehicle hold-down support 9-1, effectively
The convenience for enhancing the tensioning of belt 10 and loosening.
The other structures of the present embodiment are same as Example 4.
Embodiment 6, a kind of reliable continuous conveyor system auto-tensioning control system, the tensioning winch 1 include fixed twist
The winch support 1-1 of car owner's motor 2 and fixed pulley bracket 1-2, fixed pulley bracket 1-2 corresponding with tensioning vehicle walker 9-3
On be provided with the first fixed pulley group 1-3, be tensioned on vehicle mobile holder 9-3 and be provided with corresponding with the first fixed pulley group 1-3 the
Two fixed pulley group 1-4.The tensioning wirerope 5 is back and forth wrapped between the first fixed pulley group 1-3 and the second fixed pulley group 1-4,
Tensioning 5 multiply of wirerope is connected in parallel between the first fixed pulley group 1-3 and the second fixed pulley group 1-4, has fully ensured that traction
Reliability.
The other structures of the present embodiment are identical as embodiment 4 or 5.
Embodiment 7, a kind of reliable continuous conveyor system auto-tensioning control system, the fixed pulley bracket 1-2 and winch
It is provided with wire rope reverse frame 1-5 between bracket 1-1, commutation fixed pulley 1-6 is provided on wire rope reverse frame 1-5.It is tensioned steel
Cord 5 is successively connected to the second fixed pulley group 1-4 by commutation fixed pulley 1-6, the first fixed pulley group 1-3 from cable drum 3,
The position of tensioning wirerope 5 can easily be adjusted.
The other structures of the present embodiment are same as Example 6.
Embodiment 8, a kind of control method of reliable continuous conveyor system auto-tensioning control system, as shown in figure 3, including
Control process, parking toll process and pine band control process, the PLC slave station 8-1 is tensioned to be connected with control flow 8-5, pass through control
System screen 8-5 keys in setting tension value, band-type brake dropping current strength and band-type brake closed path value, the tensioning control to PLC slave station 8-1
Process the following steps are included:
Step 1: when the tension that PLC slave station 8-1 receives the detection of tension sensor 6 is less than the lower limit value of setting tension value, PLC
Slave station 8-1 controls frequency converter 8-2 work, and PLC slave station 8-1 is pre- to the output exciting current of winch main motor 2 by frequency converter 8-2
Excitation, winch main motor 2 establish output torque electric current after magnetic flux, until torque current reaches band-type brake dropping current strength；
Step 2: keeping the torque current in step 1 constant, while PLC slave station 8-1 sending is opened a sluice gate to instruct, and controls band-type brake relay
Device 7-2 closure, band-type brake motor 7-1 obtain it is electric after control band-type brake 7 open；
Step 3: after band-type brake 7 fully opens, PLC slave station 8-1 control frequency converter 8-2 exports the torque current being gradually increased, control
Winch main motor 2 processed starts to accelerate to rotate forward operation, and winch main motor 2 is made to be quickly obtained the big torque in taut band direction.
The structure of the present embodiment can be identical as any one of embodiment 1-7.
Embodiment 9, a kind of control method of reliable continuous conveyor system auto-tensioning control system, the parking toll mistake
Journey includes following work step:
Step 4: when the tension that the PLC slave station 8-1 receives the detection of tension sensor 6 reaches setting tension value, PLC slave station 8-1
It controls frequency converter 8-2 and reduces torque current, remained unchanged after torque current drops to band-type brake closed path value；
Step 5: after torque current drops to band-type brake closed path value, PLC slave station 8-1 issues band-type brake instruction immediately, controls band-type brake
Relay 7-2 is disconnected, and control band-type brake 7 is closed after band-type brake motor 7-1 power loss；
Step 6: the PLC slave station 8-1 issues time delay command, and band-type brake 7 is waited to be closed completely；
Step 7: after the band-type brake 7 in step 6 is closed completely, PLC slave station control frequency converter 8-2 exports the torque gradually decreased
Electric current realizes stably stop until dropping to zero.
The structure of the present embodiment can be identical as any one of embodiment 1-7.
Other control methods of the present embodiment are same as Example 8.
Embodiment 10, a kind of control method of reliable continuous conveyor system auto-tensioning control system, when tension sensor 6
When the tension detected is greater than the upper limit of setting tension value, PLC slave station 8-1 starts to start pine band control.Frequency converter 8-2 is in this work
Make in process with tensioning control process be same set of parameter setting.But when 10 tension of belt is very big, pine band moment has one
A car slipping phenomenon in short-term.In an open loop mode, low-frequency range (3HZ or less) is it cannot be guaranteed that export full torque to protect by frequency converter 8-2
Demonstrate,prove not car slipping.Therefore, guarantee that frequency converter 8-2 works under closed loop mode by increasing rotary encoder 8-4 in the design,
Realize that zero-speed expires torque to guarantee not car slipping.It is described pine band control process the following steps are included:
Step 8: the PLC slave station 8-1 receive tension sensor 6 detection tension reach setting the tension value upper limit when, PLC from
The 8-1 that stands controls frequency converter 8-2 and reduces torque current, remains unchanged after torque current drops to band-type brake closed path value；
Step 9: after torque current drops to band-type brake closed path value, PLC slave station 8-1 issues band-type brake instruction immediately, controls band-type brake
Relay 7-2 is disconnected, and control band-type brake 7 is closed after band-type brake motor 7-1 power loss；
Step 10: the PLC slave station 8-1 issues time delay command, and band-type brake 7 is waited to be closed completely；
Step 11: after the band-type brake 7 in step 10 is closed completely, PLC slave station 8-1 control frequency converter 8-2 output is gradually decreased
Torque current realize stably stop until dropping to zero；
Step 12: after the docking process in step 8, PLC slave station 8-1 controls frequency converter 8-2 work, PLC slave station
Exciting current pre-excitation 8-1 contrary with step 1 to the output of winch main motor 2 by frequency converter 8-2, the main electricity of winch
Machine 2 establishes output torque electric current after magnetic flux, until torque current reaches band-type brake dropping current strength；
Step 13: keep step 9 in torque current it is constant, while PLC slave station 8-1 sending open a sluice gate to instruct, control band-type brake after
Electric appliance 7-2 closure, band-type brake motor 7-1 obtain it is electric after control band-type brake 7 open；
Step 14: after the band-type brake 7 in step 13 fully opens, PLC slave station 8-1 control frequency converter 8-2 output gradually subtracts
Small torque current, control winch main motor 2 start low speed and reverse operation, continuous conveyor system are made slowly to reduce tension；
Step 15: when the tension value in step 14 reaches setting tension value, PLC slave station 8-1 issues band-type brake instruction immediately,
It controls band-type brake relay 7-2 to disconnect, control band-type brake 7 is closed after band-type brake motor 7-1 power loss；
Step 10 six: the PLC slave station 8-1 issues time delay command, and band-type brake 7 is waited to be closed completely；
Step 10 seven: after the band-type brake 7 in step 10 six is closed completely, PLC slave station 8-1 control frequency converter 8-2 output is gradually dropped
Low torque current realizes stably stop until dropping to zero.
The structure of the present embodiment can be identical as any one of embodiment 1-7.
Other control methods of the present embodiment are identical as embodiment 8 or 9.
The not detailed place of the present invention is conventional technical means known in those skilled in the art.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of reliable continuous conveyor system auto-tensioning control system, including tensioning winch (1), tensioning winch are arranged on (1)
There are winch main motor (2), is equipped with cable drum (3) with winch main motor (2) transmission, cable drum twines on (3)
It is wound with the tensioning wirerope (5) matched with the tensioning frame of continuous conveyor system (4), pulling force biography is provided in tensioning wirerope (5)
Sensor (6), winch main motor (2) and tension sensor (6) are connected with control unit, it is characterised in that: the winch master
It is provided in the drive shaft of motor (2) band-type brake (7), the band-type brake motor (7-1) of driving folding, band-type brake electricity is provided on band-type brake (7)
Machine (7-1) is connected by band-type brake relay (7-2) with described control unit (8), the drive shaft and wirerope of winch main motor (2)
Be provided between reel (3) speed reducer (11), control unit (8) includes PLC slave station (8-1), tension sensor (6), band-type brake after
Electric appliance (7-2) is connected with PLC slave station (8-1), and PLC slave station (8-1) is connected with frequency converter (8-2), winch main motor (2) and change
It is provided between frequency device (8-2) resistance box (8-3), winch main motor (2) passes through frequency converter (8-2) and PLC slave station (8-1) phase
Even, it is provided with rotary encoder (8-4) on winch main motor (2), rotary encoder (8-4) is connected with PLC slave station (8-1).
2. reliable continuous conveyor system auto-tensioning control system according to claim 1, it is characterised in that: the pulling force
For sensor (6) at least provided with two, two tension sensors (6) are temperature-compensating tension sensor.
3. reliable continuous conveyor system auto-tensioning control system according to claim 1 or 2, it is characterised in that: described
Tensioning frame (4) includes belt steering frame (4-1), and first group of belt steering cylinder (4-2) is provided on belt steering frame (4-1), with
Belt steering frame (4-1) is relatively set with belt tension vehicle (9), is provided on belt tension vehicle (9) and first group of belt steering
The corresponding second group of belt steering cylinder (9-2) of cylinder (4-2), the belt (10) of continuous conveyor system are wrapped in first group of belt steering
Between cylinder (4-2) and second group of belt steering cylinder (9-2), one end of tensioning wirerope (5) is fixed on belt tension vehicle (9)
On.
4. reliable continuous conveyor system auto-tensioning control system according to claim 3, it is characterised in that: the belt
Being tensioned vehicle (9) includes tensioning vehicle hold-down support (9-1), and sliding is provided with tensioning garage and walks branch in tensioning vehicle hold-down support (9-1)
Frame (9-3), second group of belt steering cylinder (9-2) setting is in tensioning vehicle mobile holder (9-3).
5. reliable continuous conveyor system auto-tensioning control system according to claim 4, it is characterised in that: the tensioning
It is provided with idler wheel (9-4), is provided with above the tensioning vehicle hold-down support (9-1) and idler wheel (9- below vehicle mobile holder (9-3)
4) guide rail (9-5) matched.
6. reliable continuous conveyor system auto-tensioning control system according to claim 4 or 5, it is characterised in that: described
Tensioning winch (1) include jinny main motor (2) winch support (1-1) and with tensioning vehicle walker (9-3) it is corresponding
Fixed pulley bracket (1-2) is provided with the first fixed pulley group (1-3) on fixed pulley bracket (1-2), is tensioned vehicle mobile holder (9-3)
On be provided with the second fixed pulley group (1-4) corresponding with first fixed pulley group (1-3), tensioning wirerope (5) is back and forth wrapped in
Between first fixed pulley group (1-3) and the second fixed pulley group (1-4), it is fixed sliding that tensioning wirerope (5) multiply is connected in parallel at first
Between wheel group (1-3) and the second fixed pulley group (1-4).
7. reliable continuous conveyor system auto-tensioning control system according to claim 6, it is characterised in that: described to determine cunning
It is provided between wheel support (1-2) and winch support (1-1) wire rope reverse frame (1-5), is arranged on wire rope reverse frame (1-5)
Have commutation fixed pulley (1-6), tensioning wirerope (5) is successively determined by commutation fixed pulley (1-6), first from cable drum (3)
Pulley blocks (1-3) are connected to the second fixed pulley group (1-4).
8. the control method of reliable continuous conveyor system auto-tensioning control system according to claim 1-7,
It is characterized by comprising tensioning control process, parking toll process and pine band control process, the PLC slave stations to be connected with control
Screen keys in setting tension value, band-type brake dropping current strength and band-type brake closed path value, the tensioning to PLC slave station by control flow
Control process the following steps are included:
Step 1: when the tension that PLC slave station receives tension sensor detection is less than the lower limit value of setting tension value, PLC slave station
Frequency converter work is controlled, PLC slave station exports exciting current pre-excitation to winch main motor by frequency converter, and winch main motor is built
Output torque electric current after vertical magnetic flux, until torque current reaches band-type brake dropping current strength；
Step 2: keeping the torque current in step 1 constant, while the sending of PLC slave station is opened a sluice gate to instruct, and controls band-type brake relay
Closure, band-type brake motor obtain it is electric after control band-type brake open；
Step 3: after band-type brake fully opens, PLC slave station control frequency converter exports the torque current being gradually increased, and controls winch
Main motor starts to accelerate to rotate forward operation, and winch main motor is made to be quickly obtained the big torque in taut band direction.
9. the control method of reliable continuous conveyor system auto-tensioning according to claim 8, it is characterised in that: described to stop
Vehicle control process includes following work step:
Step 4: when the tension that the PLC slave station receives tension sensor detection reaches setting tension value, the control of PLC slave station becomes
Frequency device reduces torque current, remains unchanged after torque current drops to band-type brake closed path value；
Step 5: after torque current drops to band-type brake closed path value, PLC slave station issue immediately band-type brake instruction, control band-type brake after
Electric appliance disconnects, control band-type brake closure after band-type brake motor power loss；
Step 6: the PLC slave station issues time delay command, and band-type brake is waited to be closed completely；
Step 7: after the band-type brake in step 6 is closed completely, the torque that the control frequency converter output of PLC slave station gradually decreases is electric
Stream realizes stably stop until dropping to zero.
10. the control method of reliable continuous conveyor system auto-tensioning according to claim 8 or claim 9, it is characterised in that: institute
State pine band control process the following steps are included:
Step 8: when the tension that the PLC slave station receives tension sensor detection reaches the setting tension value upper limit, PLC slave station control
Frequency converter processed reduces torque current, remains unchanged after torque current drops to band-type brake closed path value；
Step 9: after torque current drops to band-type brake closed path value, PLC slave station issue immediately band-type brake instruction, control band-type brake after
Electric appliance disconnects, control band-type brake closure after band-type brake motor power loss；
Step 10: the PLC slave station issues time delay command, and band-type brake is waited to be closed completely；
Step 11: after the band-type brake in step 10 is closed completely, the torque that the control frequency converter output of PLC slave station gradually decreases is electric
Stream realizes stably stop until dropping to zero；
Step 12: after the docking process in step 8, PLC slave station controls frequency converter work, and PLC slave station passes through change
Frequency device to the output of winch main motor and contrary exciting current pre-excitation in step 1, establish defeated after magnetic flux by winch main motor
Torque current out, until torque current reaches band-type brake dropping current strength；
Step 13: keeping the torque current in step 9 constant, while the sending of PLC slave station is opened a sluice gate to instruct, and controls band-type brake relay
Device closure, band-type brake motor obtain it is electric after control band-type brake open；
Step 14: after the band-type brake in step 13 fully opens, PLC slave station control frequency converter exports the torque being gradually reduced
Electric current, control winch main motor start low speed and reverse operation, continuous conveyor system are made slowly to reduce tension；
Step 15: when the tension value in step 14 reaches setting tension value, PLC slave station issues band-type brake instruction, control immediately
Band-type brake relay processed disconnects, control band-type brake closure after band-type brake motor power loss；
Step 10 six: the PLC slave station issues time delay command, and band-type brake is waited to be closed completely；
Step 10 seven: after the band-type brake in step 10 six is closed completely, PLC slave station control frequency converter exports the torque gradually decreased
Electric current realizes stably stop until dropping to zero.
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| CN201910190320.0A CN109703989A (en) | 2019-03-13 | 2019-03-13 | A kind of reliable continuous conveyor system auto-tensioning control system and its control method |
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| CN111874540A (en) * | 2020-08-11 | 2020-11-03 | 大连华锐重工国际贸易有限公司 | Movable tensioning control system and method for displacing belt conveyor |
| CN112520325A (en) * | 2020-12-10 | 2021-03-19 | 福建龙净环保股份有限公司 | Pipe belt conveyor tensioning control method and device and pipe belt conveyor |
| CN112570467A (en) * | 2019-09-27 | 2021-03-30 | 上海宝信软件股份有限公司 | Anti-slip control method and system suitable for vertical loop |
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