CN107601192A - A kind of design protection of mining elevator electric control gear - Google Patents
A kind of design protection of mining elevator electric control gear Download PDFInfo
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- CN107601192A CN107601192A CN201711069877.6A CN201711069877A CN107601192A CN 107601192 A CN107601192 A CN 107601192A CN 201711069877 A CN201711069877 A CN 201711069877A CN 107601192 A CN107601192 A CN 107601192A
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Abstract
The invention discloses a kind of design protection of mining elevator electric control gear, the design protection includes hardware safety circuit, software security circuit and PLC protective loops；The present invention be directed to the design protection that three class failures of mining elevator electric-control system are done.Wherein hardware safety circuit, software security circuit is used for safety arrestment failure and first electric braking, the protection of rear safety arrestment failure immediately, PLC protective loops be used to completing this driving after, the protection for the failure that do not allow to drive again.Design protection method of the invention is simple in construction, reliable operation, is played a very good protection when the class failure of Electric Control System of Mine Hoister three occurs, and is to ensure that mine normal production, ensures a kind of effectively safeguard of equipment and personal security.
Description
Technical field
The present invention relates to mine hoist control panel field, specifically a kind of guarantor of mining elevator electric control gear
Shield design.
Background technology
Mine hoist is a kind of large-scale hoister tool equipment, visibly moved using rope belt by motor driven plant equipment
Device lifts in the wellbore, completes conveying task.Modern mine hoist lifting capacity is big, speed is high, is widely used, to ensure personnel
And the safety of equipment, requirement to elevator electric control device security also more and more higher.Therefore it provides one kind ensures mine hoisting
Machine guard method safe for operation is vital.Electric Control System of Mine Hoister most common failure has three classes：Safety immediately
Brake fault：Including frequency converter failure, pulleying failure, the failure that exceeds the speed limit, tightly stop failure, brake fluid system failure, misorientation manually
Failure, shaft encoder failure and slack rope failure.When this kind of failure occurs, it is desirable to which mine hoist must Brake stop immediately.②
First electric braking, rear safety arrestment failure：This kind of failure has brake block abrasion, when this kind of failure occurs, it is desirable to frequency conversion speed-adjusting system
Automatically slowed down, switch to brake hard immediately when speed is dropped to below creep speed.3. after completing this driving, do not allow
Drive again failure：Including oil filter blocks, Oil pressure is too high, hydraulic station high oil temperature, residual voltage are too high and main motor mistake
Temperature.Occur this kind of failure before driving, can not should drive, if occurring such failure in running, allow this to drive to complete,
But next driving is not allowed, unless trouble shooting.
The content of the invention
For three class failures of above-mentioned Electric Control System of Mine Hoister, the invention discloses a kind of mine lift Electrical Control dress
The design protection put, it is therefore an objective to preferably ensure mine normal production, ensure equipment and personal security.
The technical solution adopted by the present invention is：A kind of design protection of mining elevator electric control gear, including hardware security
Circuit, software security circuit and PLC protective loops.
The hardware safety circuit by tightly stopping relay normally open contact manually（301）, main circuit of frequency converter close relay it is normal
Open contact（302）, pulleying relay normally open contact under hardware（303）, lower pulleying bypass relay normally open contact（304）, hardware
Upper pulleying relay normally open contact（305）, upper pulleying bypass relay normally open contact（306）, fixed point overspeed relay it is normally closed touch
Point（307）, frequency converter failure relay normally closed contact（308）, PLC operation relay normally open contact（309）, PLC tightly stop relay
Device normally opened contact（310）, PLC power supplys close relay normally open contact（311）, accident reset relay normally opened contact（312）, main order
Handle zero relay normally opened contact（313）, safety relay normally opened contact（314）, safety relay coils one（315）With
PLC tightly stops relay normally closed contact（316）Composition.During Electric Control System of Mine Hoister normal operation, all contacts of safety return circuit
Closure, shows system without safety arrestment failure immediately.When in system it is faulty occur when, it is corresponding in hardware safety circuit loop
Contact disconnects, and cuts off safety return circuit, safety relay release, elevator system is braked immediately.
The software security circuit is a kind of software security circuit realized by PLC program, by tightly closing down a little manually
（401）, converter power supply runs jointly a little（402）, pulleying close point under software（403）, lower pulleying bypass prescribes（404）, mistake on software
Roll up close point（405）, upper pulleying bypass prescribes（406）, fixed point hypervelocity close point（407）, constant speed hypervelocity close point（408）, rope creep protection
Close point（409）, encoder fault close point（410）, misorientation protection close point（411）, frequency converter failure close point（412）, depth instruction
Device failure close point（413）, the too high close point of residual voltage（414）, the too high close point of braking oil pressure（415）, converter power supply runs jointly a little（416）
With safety relay coils two（417）Composition, forms a kind of software security circuit.
The PLC protective loops are a kind of protection circuits controlled by PLC program, and feddback relay device is blocked by oil filter
Normally opened contact（201）, high oil temperature feddback relay device normally opened contact（202）, the too high feddback relay device normally opened contact of oil pressure
（203）, the too high feddback relay device normally opened contact of residual voltage（204）, brake block abrasion feddback relay device normally-closed contact（205）, motor mistake
Warm feddback relay device normally opened contact（206）, the input points of PLC first（101）, the input points of PLC second（102）, the input points of PLC the 3rd
（103）, the input points of PLC the 4th（104）, the input points of PLC the 5th（105）With the input points of PLC the 6th（106）Composition.PLC is protected back
Road is used for after completing first electric braking, rear safety arrestment failure and completing this driving, the protection for the failure that do not allow to drive again.
The beneficial effects of the invention are as follows：Hardware safety circuit, software security circuit and the PLC protective loop structures of the present invention
Simply, reliable operation, played a very good protection when the class failure of Electric Control System of Mine Hoister three occurs, be to ensure that mine
Normal production, ensure a kind of effectively safeguard of equipment and personal security.
Brief description of the drawings
Fig. 1 is hardware safety circuit schematic diagram.
Fig. 2 is software security circuit diagram.
Fig. 3 is PLC protective loop schematic diagrames.
Embodiment
Technical scheme is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
For three class failures of above-mentioned Electric Control System of Mine Hoister, the invention discloses a kind of mine lift Electrical Control dress
The design protection put, including hardware safety circuit, software security circuit and PLC protective loops.
As shown in figure 1, for the frequency converter failure of safety arrestment failure immediately, pulleying failure, hypervelocity failure and tight manually
Stop failure, devise a kind of hardware safety circuit, the circuit by tightly stopping relay normally open contact manually（301）, frequency converter master return
Close relay normally open contact in road（302）, pulleying relay normally open contact under hardware（303）, lower pulleying bypass relay normally open touches
Point（304）, pulleying relay normally open contact on hardware（305）, upper pulleying bypass relay normally open contact（306）, fixed point hypervelocity
Relay normally closed contact（307）, frequency converter failure relay normally closed contact（308）, PLC operation relay normally open contact（309）、
PLC tightly stops relay normally open contact（310）, PLC power supplys close relay normally open contact（311）, accident reset relay it is normally opened touch
Point（312）, main make handle zero relay normally opened contact（313）, safety relay normally opened contact（314）, safety relay line
Circle one（315）Tightly stop relay normally closed contact with PLC（316）Composition.
Hardware safety circuit connection method is：Power supply positive electricity（M+）Connection tightly stops relay normally open contact manually（301）'s
One end, then tightly stop relay normally open contact manually（301）, main circuit of frequency converter close relay normally open contact（302）, under hardware
Pulleying relay normally open contact（303）, pulleying relay normally open contact on hardware（305）It is sequentially connected in series, lower pulleying bypasses relay
Device normally opened contact（304）With pulleying relay normally open contact under hardware（303）Parallel connection, upper pulleying bypass relay normally open contact
（306）With pulleying relay normally open contact on hardware（305）With pinpointing overspeed relay normally-closed contact after parallel connection（307）Series connection,
Pinpoint overspeed relay normally-closed contact（307）, frequency converter failure relay normally closed contact（308）, PLC operation relay normally open touch
Point（309）, PLC tightly stop relay normally open contact（310）, PLC power supplys close relay normally open contact（311）It is sequentially connected in series, accident
Reset relay normally opened contact（312）, main make handle zero relay normally opened contact（313）It is normally opened with safety relay after series connection
Contact（314）Parallel connection, then close relay normally open contact with PLC power supplys（311）Series connection, then tightly stop with PLC that relay is normally closed to be touched
Point（316）, safety relay coils one（315）Series connection, safety relay coils one（315）The other end and power supply negative electricity（M-）
Connection, forms complete hardware safety circuit.
The operation principle of hardware safety circuit is：Under unfaulty conditions, tightly stop relay adhesive manually, tightly stop relay manually
Device normally opened contact（301）Closure；Main circuit of frequency converter switch closure, main circuit of frequency converter close relay adhesive, and frequency converter master returns
Close relay normally open contact in road（302）Closure；Pulleying switch be normally closed contact on pulleying and hardware under hardware, under hardware pulleying with
Pulleying relay adhesive on hardware, pulleying relay normally open contact under hardware（303）With pulleying relay normally open contact on hardware
（305）Closure；Fixed point overspeed switch is normal opened contact, pinpoints overspeed relay normally-closed contact（307）It is kept closed.Frequency conversion
Device failure is fed back to normal opened contact, frequency converter failure feddback relay device normally-closed contact（308）It is kept closed；PLC system is just
Often during work, PLC operation relay adhesives, PLC operation relay normally open contacts（309）Closure, PLC power supplys close relay and inhaled
Close, PLC power supplys close relay normally open contact（311）Closure；PLC tightly stops relay adhesive, and PLC tightly stops relay normally open contact
（310）Closure.When PLC program fault-free is fed back, it is non-band electricity condition that PLC, which tightly stops relay, and PLC tightly stops relay normally closed contact
（316）It is kept closed.Under unfaulty conditions, driving position is main to make handle be placed in zero-bit, main to make handle zero relay normally opened
Contact（313）Closure, now presses accident SR, and accident reset relay adhesive is normally opened tactile in accident reset relay
Point（312）Close moment, safety relay coils one（315）Obtain electric, safety relay adhesive so that safety relay is normally opened to be touched
Point（314）Closure.Hereafter even if accident SR is upspring or main makes handle leave zero-bit, safety relay contact（314）Still
Safety relay coils one can be made（315）It is kept as electricity condition.Safety relay adhesive, show Electric Control System of Mine Hoister without
Safety arrestment failure immediately.When having in electric-control system immediately, the frequency converter failure of safety arrestment failure, pulleying failure, hypervelocity are former
Barrier, when tightly stopping failure manually and occur, corresponding contact disconnects in hardware safety circuit loop, so as to cut off safety return circuit, safety
Relay coil one（315）Dead electricity, safety relay release, makes hoist control system brake immediately.
As shown in Fig. 2 brake fluid system failure, misorientation failure, the shaft encoder event for safety arrestment failure immediately
Barrier and slack rope failure, devise a kind of software security circuit of PLC program, and the circuit includes tightly closing down a little manually（401）, frequency conversion
Device power supply is run jointly a little（402）, pulleying close point under software（403）, lower pulleying bypass prescribes（404）, pulleying close point on software
（405）, upper pulleying bypass prescribes（406）, fixed point hypervelocity close point（407）, constant speed hypervelocity close point（408）, rope creep protection close point
（409）, encoder fault close point（410）, misorientation protection close point（411）, frequency converter failure close point（412）, depth indicator lose
Imitate close point（413）, the too high close point of residual voltage（414）, the too high close point of braking oil pressure（415）, converter power supply runs jointly a little（416）And peace
All relay coil two（417）.
The connection method of the software security circuit is：Power supply positive electricity（M+）Connection is tightly closed down a little manually（401）, it is tight manually
Close down a little（401）, converter power supply runs jointly a little（402）, pulleying close point under software（403）, pulleying close point on software（405）Successively
Series connection, lower pulleying bypass prescribe（404）With pulleying close point under software（403）Parallel connection, upper pulleying bypass prescribe（406）With on software
Pulleying close point（405）Exceed the speed limit close point after parallel connection with fixed point（407）Series connection, fixed point hypervelocity close point（407）, constant speed hypervelocity close point
（408）, rope creep protection close point（409）, encoder fault close point（410）, misorientation protection close point（411）, frequency converter failure close point
（412）, depth indicator failure close point（413）, the too high close point of residual voltage（414）With the too high close point of braking oil pressure（415）Go here and there successively
Connection, then with safety relay coils two（416）One end connection, safety relay coils two（416）The other end and power supply
Negative electricity（M-）Connection, forms complete software security circuit.
The operation principle of the software security circuit is：Under unfaulty conditions, tightly close down manually in software security circuit
Point（401）It is kept closed, converter power supply is connected, and converter power supply is run jointly a little（402）Close, pulleying close point under software
（403）, pulleying close point on software（405）, fixed point hypervelocity close point（407）, constant speed hypervelocity close point（408）, rope creep protection close point
（409）, encoder fault close point（410）, misorientation protection close point（411）, frequency converter failure close point（412）, depth indicator lose
Imitate close point（413）, the too high close point of residual voltage（414）, the too high close point of braking oil pressure（415）It is kept closed, safety relay
Coil two（416）Obtain electric.When having brake fluid system failure, misorientation failure, shaft encoder failure and slack rope failure etc. in system
When safety failure occurs, corresponding closing point will disconnect in software security circuit, so as to cut off software security loop, safety after
Electric apparatus coil two（416）Dead electricity, safety relay release, makes hoist control system brake immediately.
As shown in figure 3, for the second class elder generation electric braking, rear safety arrestment failure and the 3rd class complete this driving after,
Do not allow failure of driving again, devise a kind of protective loop controlled by PLC program, the loop includes oil filter and blocks feedback
Relay normally open contact（201）, high oil temperature feddback relay device normally opened contact（202）, the too high feddback relay device of oil pressure it is normally opened touch
Point（203）, the too high feddback relay device normally opened contact of residual voltage（204）, brake block abrasion feddback relay device normally-closed contact（205）, motor
Excess temperature feddback relay device normally opened contact（206）, the input points of PLC first（101）, the input points of PLC second（102）, PLC the 3rd input
Point（103）, the input points of PLC the 4th（104）, the input points of PLC the 5th（105）With the input points of PLC the 6th（106）.
The connection method of the PLC protective loops is：Oil filter blocks feddback relay device normally opened contact（201）One end and public affairs
End connection altogether, the other end and the input points of PLC first（101）Connection.High oil temperature feddback relay device normally opened contact（202）One end with
Common port connects, the other end and the input points of PLC second（102）Connection.The too high feddback relay device normally opened contact of oil pressure（203）One end
It is connected with common port, the other end and the input points of PLC the 3rd（103）Connection.The too high feddback relay device normally opened contact of residual voltage（204）One
End is connected with common port, the other end and the input points of PLC the 4th（104）Connection.Brake block abrasion feddback relay device normally-closed contact（205）
One end is connected with common port, the other end and the input points of PLC the 5th（105）Connection.Motor excess temperature feddback relay device normally opened contact
（206）One end is connected with common port, the other end and the input points of PLC the 6th（106）Connection.
The operation principle of PLC protective loops is：When brake block abrasion is serious, brake block abrasion feddback relay device normally-closed contact
（205）Disconnect, the input points of PLC the 5th（105）Blackout, show brake block abrasion failure occur, PLC receives brake block abrasion event
After hindering feedback signal, PLC analog modules export voltage signal corresponding with given speed to frequency converter signal input end, make change
Frequency device automatic retarding, when speed is dropped to below creep speed, PLC export it is tight stop signal and tightly stop relay to PLC, make PLC tight
Stop relay normally closed contact（316）Disconnect, cut off hardware safety circuit loop immediately, realize brake hard.
When oil filter blocks, oil filter blocks feddback relay device normally opened contact（201）Closure, output fault-signal is extremely
The input points of PLC first（101）, and then perform PLC once driving error protection program.When high oil temperature, high oil temperature is anti-
Present relay normally open contact（202）Closure, output fault-signal to the input points of PLC second（102）, and then perform PLC once
Driving error protection program.When oil pressure is too high, the too high feddback relay device normally opened contact of oil pressure（203）Closure, output failure letter
Number to the input points of PLC the 3rd（103）, so as to perform PLC once driving error protection program.When residual voltage is too high, residual voltage mistake
High feddback relay device normally opened contact（204）Closure, output fault-signal to the input points of PLC the 4th（104）, so as to perform PLC's
Once driving error protection program.When motor temperature is too high, motor excess temperature feddback relay device normally opened contact（206）Closure, it is defeated
Signal be out of order to the input points of PLC the 6th（106）, so as to perform PLC once driving error protection program.
To more fully understand the design philosophy of the present invention, the protection to various failures below is described further.
When frequency converter breaks down, the action of frequency converter internal fault feddback relay device, the corresponding actuating of relay of electric-control system,
Cut off safety return circuit.After safety return circuit cut-out, system shutdown oil circuit, emergency lock action, brake hard is formed.
Pulleying refers to that hoisting container has surmounted corresponding parking spot, and this is very serious for elevator system
Failure, once pulleying is possible to cause hoisting container to bump against other equipment or personnel, and form great security incident.It is being
The pulleying switch of two hardware is set in system, and the position corresponding to it is pulleying position under pulleying on hardware and hardware.The two
Switch is arranged on memorial archway type depth indicator, and when hoisting container runs to upper pulleying position, stroke touches iron and went up triggering
Pass is wound off, the relay normally closed contact of pulleying is disconnected, realizes overtravel protection on hardware.When hoisting container runs to lower pulleying
During position, stroke, which touches iron, will trigger lower pulleying switch, disconnect the relay normally closed contact of lower pulleying, realize that pulleying is protected under hardware
Shield.Because overtravel protection is extremely important, therefore closed type is set to, that is, overtravel protection is disconnected in failure, this
Sample can effectively prevents from causing overtravel protection to fail because overtravel protection breaks.The protection of software pulleying is extracted two axles and compiled
Code device sampled signal, and it is converted into the position of linear velocity and hoisting container.The position of two hoisting containers formed is phase
It is mutually independent, the position of pulleying and lower pulleying on corresponding software is set respectively in software, software double wire system mistake can be realized
Roll up defencive function.
Constant speed overspeed protection require elevator in the process of running, no matter any moment, maximal rate all no more than etc.
Fast section speed（That is normal speed）15%.Once will brake hard more than this speed.
Elevator of the lifting speed more than 3m/s must install speed-limiting device, to ensure speed during hoisting container incoming terminal
Degree is no more than 2m/s.Because this protection is to consider the speed of correspondence position, therefore this protection is referred to as fixed point overspeed protection.
The speed that two encoders are sampled in system is compared with the speed that frequency converter samples, when both differences reach
0.5m/s, and when continuing 1.5 seconds, control system then thinks encoder fault.Because encoder is correct reflection hoisting container position
The important sensing element put, therefore software security circuit can be cut off at once when encoder breaks down, implement brake hard.
When system to frequency converter is above to propose instruction, and shaft encoder feedback is decentralization operation, i.e., there occurs misorientation therefore
Barrier.Misorientation is also known as " car slipping ", refers to that the direction that system is run is in opposite direction with controlling.This accident is very serious, has
Great personal safety accident may be caused.System once detects misorientation, can implement brake hard immediately.
In elevator system, having can be stopped in emergency as needed at three.Operating desk tightly stops manually：On operating desk
There is an emergency stop push button, when driver has found to have emergency, only need to take button, the button just voluntarily pins, real
Existing jerk.Driving position is foot-operated tightly to stop：In view of in particular cases, driver's hand may just account for and be inconvenient to clap button, grasping
Make to be also devised with a foot-operated tight guard's valve below platform, once driver has found there is emergency, time switch can be trampled with pin,
Realize jerk.Signal tightly stops：When signalman has found emergency in orbit, signalman can be in any one horizontal letter
Taken on number control box and tightly stop button, realize jerk.
Lifting device must be provided with brake clearance protection device, can automatic alarm or automatic when brake clearance exceedes setting
Power-off.Because the mechanical braking of system is to rely on work lock and emergency lock to implement, therefore the protection to brake shoe requires high,
Once brake block abrasion, than more serious, butterfly spring may not reset brake shoe.Therefore, hoist control system must detect lock
Watt abrasion condition, that is, realize brake block abrasion protect.
For oil filter once blocking, hydraulic oil will be contaminated, and hydraulic valve on or off may be caused not in place, led to not normal
Drive.Hydraulic station uses the pressure at pressure difference relay real-time sampling oil filter both ends in itself, will output event when oil filter blocks
Hinder signal, and be included into the once driving failure of system.
Once hydraulic system oil pressure is too high, dish brake during orderly shutdown may be caused to return to position, i.e., can not be braking
Torque is fully applied to above main drum, is very unsafe.Oil pressure is too high also result in each pipeline of mechanical system, valve,
The fault rate of the parts such as butterfly spring improves, and makes mechanical system service life reduction.Oil pressure is too high when also resulting in parking, and dish brake is empty
Journey time lengthens, and causes car slipping accident.
The residual voltage of system refers to the remaining pressure of hydraulic station when elevator is not run in itself, once residual voltage is too high, butterfly bullet
Elastic potential energy stored by spring is possible to that dish brake can not be made to return to position, and reduces braking moment, forms unsafe factor.
Hydraulic station uses electro connecting pressure gauge real-time sampling residual voltage, will when hydraulic station residual voltage is too high exceedes the maximum allowable residual voltage of setting
Fault-signal is exported, and is included into the once driving failure of system.
After hydraulic station high oil temperature, it is easy for causing hydraulic system hydraulic oil to dilute, valve is in the case of same aperture
Oil pressure raises, and may cause brake fade.Hydraulic station uses the temperature of electric contact thermometer real-time sampling hydraulic oil, temperature in itself
Fault-signal will be exported when too high, and is included into the once driving failure of system.
In elevator system, the temperature protection of motor is most important.The motor used in this design protection is furnished with several roads
PT100 thermal resistances, are used as temperature protection.When any one detection temperature exceedes design temperature in temperature sensor, temperature
Logging can all alarm, and be output in PLC.When system discovery has motor overheating, it is allowed to complete this driving, forbid next time
Drive, until trouble shooting.
Claims (3)
- A kind of 1. design protection of mining elevator electric control gear, it is characterised in that：The design protection include hardware safety circuit, Software security circuit and PLC protective loops；The hardware safety circuit by tightly stopping relay normally open contact manually（301）, frequency conversion Device major loop closes relay normally open contact（302）, pulleying relay normally open contact under hardware（303）, lower pulleying bypass relay Normally opened contact（304）, pulleying relay normally open contact on hardware（305）, upper pulleying bypass relay normally open contact（306）, it is fixed Point overspeed relay normally-closed contact（307）, frequency converter failure relay normally closed contact（308）, PLC operation relay normally open contact （309）, PLC tightly stop relay normally open contact（310）, PLC power supplys close relay normally open contact（311）, accident reset relay Normally opened contact（312）, main make handle zero relay normally opened contact（313）, safety relay normally opened contact（314）, safety after Electric apparatus coil one（315）Tightly stop relay normally closed contact with PLC（316）Composition；In the hardware safety circuit, power supply positive electricity（M +）Connection tightly stops relay normally open contact manually（301）One end, tightly stop relay normally open contact manually（301）The other end with Main circuit of frequency converter closes relay normally open contact（302）, pulleying relay normally open contact under hardware（303）, on hardware pulleying after Electrical equipment normally opened contact（305）It is sequentially connected in series, lower pulleying bypasses relay normally open contact（304）With pulleying relay normally open under hardware Contact（303）Parallel connection, upper pulleying bypass relay normally open contact（306）With pulleying relay normally open contact on hardware（305）And With pinpointing overspeed relay normally-closed contact after connection（307）Series connection, pinpoint overspeed relay normally-closed contact（307）, frequency converter failure Relay normally closed contact（308）, PLC operation relay normally open contact（309）, PLC tightly stop relay normally open contact（310）、PLC Power supply closes relay normally open contact（311）It is sequentially connected in series, accident reset relay normally opened contact（312）With it is main make handle zero-bit after Electrical equipment normally opened contact（313）After series connection with safety relay normally opened contact（314）Parallel connection, then close relay with PLC power supplys again Normally opened contact（311）Series connection, then tightly stop relay normally closed contact with PLC（316）, safety relay coils one（315）Series connection, peace All relay coil one（315）The other end and power supply negative electricity（M-）Connection, form a complete hardware safety circuit.
- A kind of 2. design protection of mining elevator electric control gear according to claim 1, it is characterised in that：The software Safety circuit includes tightly closing down a little manually（401）, converter power supply runs jointly a little（402）, pulleying close point under software（403）, descended Volume bypass prescribes（404）, pulleying close point on software（405）, upper pulleying bypass prescribes（406）, fixed point hypervelocity close point（407）, etc. Speed hypervelocity close point（408）, rope creep protection close point（409）, encoder fault close point（410）, misorientation protection close point（411）, frequency conversion Device failure close point（412）, depth indicator failure close point（413）, the too high close point of residual voltage（414）, the too high close point of braking oil pressure （415）, converter power supply runs jointly a little（416）With safety relay coils two（417）；In the software security circuit, power supply is just Electricity（M+）Connection is tightly closed down a little manually（401）, tightly close down manually a little（401）, converter power supply runs jointly a little（402）, software descended Roll up close point（403）, pulleying close point on software（405）It is sequentially connected in series, lower pulleying bypass prescribes（404）With pulleying close point under software （403）Parallel connection, upper pulleying bypass prescribe（406）With pulleying close point on software（405）Exceed the speed limit close point after parallel connection with fixed point（407）String Connection, fixed point hypervelocity close point（407）, constant speed hypervelocity close point（408）, rope creep protection close point（409）, encoder fault close point（410）、 Misorientation protects close point（411）, frequency converter failure close point（412）, depth indicator failure close point（413）, the too high close point of residual voltage （414）With the too high close point of braking oil pressure（415）Be sequentially connected in series, then with safety relay coils two（416）One end connection, peace All relay coil two（416）The other end and power supply negative electricity（M-）Connection, forms complete software security circuit.
- A kind of 3. design protection of mining elevator electric control gear according to claim 1, it is characterised in that：The PLC Protective loop includes oil filter and blocks feddback relay device normally opened contact（201）, high oil temperature feddback relay device normally opened contact （202）, the too high feddback relay device normally opened contact of oil pressure（203）, the too high feddback relay device normally opened contact of residual voltage（204）, brake shoe mill Damage feddback relay device normally-closed contact（205）, motor excess temperature feddback relay device normally opened contact（206）, the input points of PLC first（101）、 The input points of PLC second（102）, the input points of PLC the 3rd（103）, the input points of PLC the 4th（104）, the input points of PLC the 5th（105）With The input points of PLC the 6th（106）；The oil filter blocks feddback relay device normally opened contact（201）One end is connected with common port, another End and the input points of PLC first（101）Connection；High oil temperature feddback relay device normally opened contact（202）One end is connected with common port, separately One end and the input points of PLC second（102）Connection；The too high feddback relay device normally opened contact of oil pressure（203）One end is connected with common port, The other end and the input points of PLC the 3rd（103）Connection；The too high feddback relay device normally opened contact of residual voltage（204）One end connects with common port Connect, the other end and the input points of PLC the 4th（104）Connection；Brake block abrasion feddback relay device normally-closed contact（205）One end and common port Connection, the other end and the input points of PLC the 5th（105）Connection；Motor excess temperature feddback relay device normally opened contact（206）One end with it is public End connection, the other end and the input points of PLC the 6th（106）Connection；The too high feddback relay device normally opened contact of oil pressure（203）One end and public affairs End connection altogether, the other end and the input points of PLC the 3rd（103）Connection；The too high feddback relay device normally opened contact of residual voltage（204）One end with Common port connects, the other end and the input points of PLC the 4th（104）Connection；Brake block abrasion feddback relay device normally-closed contact（205）One end It is connected with common port, the other end and the input points of PLC the 5th（105）Connection；Motor excess temperature feddback relay device normally opened contact（206）One End is connected with common port, the other end and the input points of PLC the 6th（106）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069877.6A CN107601192A (en) | 2017-11-03 | 2017-11-03 | A kind of design protection of mining elevator electric control gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711069877.6A CN107601192A (en) | 2017-11-03 | 2017-11-03 | A kind of design protection of mining elevator electric control gear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111003617A (en) * | 2019-12-19 | 2020-04-14 | 临沂矿业集团菏泽煤电有限公司 | Elevator control system for coal mine, overspeed alarm method and residue detection method |
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