CN202609747U - Safety monitoring and control system for escalator/moving walk - Google Patents
Safety monitoring and control system for escalator/moving walk Download PDFInfo
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- CN202609747U CN202609747U CN 201220220155 CN201220220155U CN202609747U CN 202609747 U CN202609747 U CN 202609747U CN 201220220155 CN201220220155 CN 201220220155 CN 201220220155 U CN201220220155 U CN 201220220155U CN 202609747 U CN202609747 U CN 202609747U
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- escalator
- proximity transducer
- teeth
- signal
- chain wheel
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Abstract
The utility model discloses a safety monitoring and control system for an escalator/moving walk, and belongs to the technical field of protection for overspeed, reversal and exceeding of a safety stopping distance. The system comprises a programmable logic controller (PLC) processor and two proximity sensors. The proximity sensors obtain detected information from teeth driving a duplex chain wheel, and transmit the detected information to the PLC processor through cables. The PLC processor performs calculation, transmits a corresponding instruction to control the running of the escalator/moving walk, and timely and effectively stops the escalator/moving walk when the reversal, the overspeed and the exceeding of the safety stopping distance are detected. Compared with a coded disc type structure, the system has the advantage that the proximity sensors can directly detect signals generated by main driving teeth without the limitation of grease dirt and the influence of displacement of a tractor; and compared with the conventional detection device, the system is closer to a target, intermediate links are eliminated, detected signals are more real, 16 pulse signals can be generated per second, and a safety protection response can be given within one second during the overspeed and the reversal, so that the life safety of a user can be better protected.
Description
Technical field
The utility model relates to a kind of safety monitoring and control system of escalator/moving sidewalk, and it belongs to overspeed protection, the reversal protection of escalator and moving sidewalk and exceeds the technical field of safe stop distance protection.
Background technology
At present; The safety control of escalator, moving sidewalk more and more receives people's attention; Particularly the escalator accident of Beijing Metro appearance in 2011 has been beaten alarm bell to people, and State Bureau has put into effect new escalator, moving sidewalk production and made national standard GB16899-2011.
Exceed the speed limit, owe speed and non-operating reversed cardinal principle in the following several ways:
1. the undulating quantity of input voltage surpasses at ± 7% o'clock, will cause the electromagnetic torque of electrical motor output to increase or reduce, and causes the rising or the reduction of staircase speed.
2. the chain phenomenon of on sprocket wheel, " climbing ".Under extreme case, driving chain moves on the outside diameter circle of sprocket wheel, so chain jumps on the gear teeth, so can not transmit the output torque of electrical motor effectively, the driving chain sprocket output torque that forms on the driving main shaft descends, and causes staircase speed to descend.
3. receive Effect of Environmental such as dust, greasy dirt, temperature and humidity in the cone belt transmission process, friction coefficient, tension force are changed.Under the situation of bearing load, the tension force of original belt will increase thereupon, possibly cause belt on belt pulley, to slide.Like this, driving main shaft driving chain sprocket output torque is descended, staircase speed descends.
4. driving chain or cone belt fracture, or driving motor is when breaking down with the coupler between the drop-gear box just maybe get out of hand between actuating unit and the driving main shaft sprocket wheel, takes place non-operating reversed.At this moment, even the action of staircase speed monitoring safety device is cut off the electricity supply, the work detainer is braked, and the electrical motor stall also can't make staircase stop, and takes place non-operating reversed.
5. operating staircase makes progress; If meet abnormal condition such as motor fault, frequency converter no-voltage output fault or phase sequence functional fault by chance; And the work detainer still is in normal release position, and this moment, staircase can not stop equally, can take place non-operating reversed.
Adopting mechanical type, photo-electric speed monitoring device and proximity transducer to detect the way of flywheel mostly with staircase at present, solving hypervelocity, owe speed and non-operating reversed problem.
(1) mechanical centrifugal anti-kickback device: the mechanical type speed monitoring device that is installed on electrical motor flywheel place is to utilize centrifugal principle to carry out speed to detect.Centrifugal hammer is installed at speed end place at the flywheel of motor main shaft or drop-gear box, and when the staircase running velocity reached 1.2 times of command speed, centrifugal hammer is outwards stretching, extension under centrifugal action; The bump safety switch; Cut off the control loop power supply, work detainer stop, electrical motor stall.This speed control unit is only effective to the runaway speed running state, and owes speed operation to electrical motor, and when driving motor broke down with the coupler between the drop-gear box, messenger chain, cone belt skidded or be invalid when rupturing.
(2) photo-electric speed monitoring anti-kickback device: increase code-disc and be equipped with two slot type photoelectric switchs at the sprocket wheel place of traction machine drop-gear box.When main frame running, the slot type photoelectric switch utilizes object to be detected to the shading of light beam or reflect having or not of inspected object.The slot type photoelectric switch of in non-operating reversed fender guard, using always.The slot type photoelectric switch is the U font structure of standard normally; Its projector and receptor lay respectively at the both sides of U type groove; And form an optical axis, when object to be detected during through U type groove blocking-up optical axis, two opto-electronic pickups have just produced staggered switching value signal and have been transferred to the PLC treater.When speed reaches 1.2 times of command speed or is lower than specified running velocity, send instruction through PLC and cut off the control circuit power supply, work detainer stop, electrical motor stall.Its shortcoming be when the greasy dirt splash to the luminous point of sensor or the debugging position jitter or malfunctioning can appear when slightly deviation being arranged because very burden in the corner of traction machine, is brought to maintenance in the position of installing after the outer decoration packing of staircase.When elongation or fracture take place driving chain, can't detect the actual parameter in service of staircase.
(3) mechanical type anti-kickback device: weight at ordinary times by gravity pressure on messenger chain, ratchet and connecting rod are enclosed within on the same axle.In case messenger chain fracture.Weight to lower swing, makes connecting rod touch halt switch under the effect of gravity.This switch belongs to electric safety device, goes here and there in the safety return circuit of escalator or moving sidewalk control system, because the action of this switch, thereby make detainer work (being in the obvolvent state), cut off the power supply of motor.Simultaneously ratchet is through connecting rod and the swing of axle also cw, makes in the groove of ratchet card people ratchet and makes the ratchet stop.Shortcoming is that driving motor when breaking down with the coupler between the drop-gear box, non-chain rupture are invalid when reversing.
(4) proximity transducer control monitor unit: generally be installed on the electrical motor.When flywheel rotates, be transferred to the PLC treater through the number of pulses that detects the magnetic patch generation, monitor the real-world operation speed of staircase.When speed reaches 1.2 times of command speed or is lower than specified running velocity, send instruction through PLC and cut off the control circuit power supply, work detainer stop, electrical motor stall.When driving motor breaks down with the coupler between the drop-gear box, messenger chain, cone belt skid or rupture so cause staircase owe speed, when non-operating reversed, because electrical motor itself is in proper working order, so detected signal still is " normally ".
More than several kinds of modes shortcoming is all arranged, can not the escalator in timely stop running when unexpected appear all.
Summary of the invention
In order to overcome the problem that exists in the above-mentioned prior art, the utility model provides a kind of safety monitoring and control system of escalator/moving sidewalk.This system should be able to detect the real-world operation speed of stair step/moving sidewalk, avoids detecting the blind area, and can when the abnormal condition that overspeed operation, non-artificial manipulation reverse driving take place and exceed safe stop apart from control, in time take the stop measure.
The technical scheme that the utility model adopts is: a kind of safety monitoring of escalator/moving sidewalk and control system mainly comprise a PLC treater; It also comprises one first proximity transducer and one second proximity transducer; First proximity transducer and second proximity transducer are rack-mount; Support is installed on the standpipe of truss; First proximity transducer and second proximity transducer obtain detection information and are sent to the PLC treater through cable from teeth X and the teeth Y that drives duplex chain wheel; The operation that the PLC treater sends corresponding instruction control escalator/moving sidewalk through computing, take a turn for the worse, exceed the speed limit and exceed safe stop apart from the time, in time escalator/moving sidewalk is carried out effective stop.
Said PLC treater detects since first signal refurbishing procedure that first proximity transducer obtains after escalator starts 3 seconds; The teeth X that drives duplex chain wheel produces a signal A during through the induction end of first proximity transducer, and the teeth Y that drives duplex chain wheel produces a signal B during through the induction end of second proximity transducer; When reversing appears in escalator/moving sidewalk; Change in the process of the rotation direction of stipulating at traction machine; Speed is reverse then until stopping from fast to slow; Time difference between the signal A-signal B changes, and the Time Calculation program in the PLC treater begins computing and sends instruction, cuts off control output.
Said first proximity transducer begins to detect when escalator/moving sidewalk gets into permanent speed from starting; First teeth that drive duplex chain wheel produce during through the induction end of first proximity transducer signal+; Drive room that duplex chain wheel continues to rotate to teeth produce signal-; Through second teeth produce again signal+; So staggeredly produce a uniform impulse singla, when the speed of staircase operation surpassed 1.2 times of command speed, the impulse singla that produces in the unit time increased; Tally function in the said PLC treater is passed through the contrast computing, finds to exceed the speed limit and sends instruction cut-out control output immediately, and pass through the locking of PLC treater internal processes.
Said second proximity transducer is after starting 3 seconds, and to port x 1 first signal of transmission of PLC treater, program begins to refresh, and detects beginning; Second proximity transducer begins to detect teeth X and detected signal is transferred to port x 1; The teeth X that drives duplex chain wheel produce during through the induction end of second proximity transducer signal+, drive room that duplex chain wheel continues to rotate to teeth produce signal-, through teeth Y produce again signal+; Uniform impulse singla of so staggered generation; The PLC treater takes advantage of the roller of duplex chain wheel to measure apart from equaling the stop distance through the number that calculates impulse singla, and when stop was stopped scope apart from the overflow customization, the program in the PLC treater began computing and sends instruction; Y14, Y15, Y17, KBZ dead electricity; Stop the output of Y12, Y14, Y15, Y16, Y17, escalator/moving sidewalk can not start once more, can turn round after must restarting system.
The beneficial effect of the utility model: the safety monitoring of this escalator/moving sidewalk and control system mainly comprise a PLC treater and two proximity transducers; Proximity transducer obtains detection information and is sent to the PLC treater through cable from the teeth that drive duplex chain wheel; The PLC treater sends the operation of corresponding instruction control escalator/moving sidewalk through computing; Take a turn for the worse, exceed the speed limit and exceed safe stop apart from the time, in time escalator/moving sidewalk is carried out effective stop.This system realizes three safety protection functions: hypervelocity, reverse, stop distance detecting.Compare with the Weight and disk type structure, proximity transducer does not receive the restriction of greasy dirt, directly detects the main signal that teeth produce that drives, and does not receive the influence of traction machine displacement.The contrast of in the past detection position is cut down the number of intermediate links more near target, and the detection signal that obtains is truer, when the life security that safety system when unexpected can the better protection people occurring.Per second can produce 16 impulse singlas, and safety guard-safeguard can be made a response with interior in 1 second when hypervelocity taking place and reverse.
Description of drawings
Below in conjunction with accompanying drawing and implementation method the utility model is described further.
Fig. 1 is a kind of safety monitoring of escalator/moving sidewalk and the arrangement plan of control system.
Fig. 2 is A among Fig. 1 (installation of a proximity transducer) enlarged drawing.
Fig. 3 is PLC treater control loop figure.
Among the figure: 1, teeth X, 2, first proximity transducer, 3, teeth Y, 4, second proximity transducer, 5, the PLC treater, 6, drive duplex chain wheel, 7, cable, 8, support, 9, truss, 10, standpipe.
The specific embodiment
Fig. 1,2 shows a kind of safety monitoring of escalator and the arrangement plan of control system.Among the figure; The safety monitoring of this escalator and control system mainly comprise a PLC treater 5, first proximity transducer 2 and second proximity transducer 4; First proximity transducer 2 and second proximity transducer 4 are installed on the support 8; Support 8 is installed on the standpipe 10 of truss 9, and first proximity transducer 2 and second proximity transducer 4 obtain detection information and are sent to PLC treater 5 through cable 7 with teeth Y 3 from the teeth X 1 that drives duplex chain wheel 6, and PLC treater 5 sends the operation of corresponding instruction control escalator through computing; Take a turn for the worse, exceed the speed limit and exceed safe stop apart from the time, in time escalator is carried out effective stop.
Fig. 3 shows PLC treater control loop figure.This system can detect the real-world operation speed of stair step, avoids detecting the blind area, and can when the abnormal condition that overspeed operation, non-artificial manipulation reverse driving take place and exceed safe stop apart from control, in time take the stop measure.
1. non-operating reversed control process
It is up that key switch SSY starts staircase, and SSY passes through port x 5 to PLC treater 5 incoming signals, if port x 2 conductings of safety return circuit KJT; Through PLC treater 5 calculation process, mouth Y12 band-type brake KBZ gets electric, is path signal if X16 newspaper lock detects; Through PLC treater 5 calculation process; The up contactless switch of 1 rear port Y14 in second gets electric, and port Y16, Y17 star angle start electricly, and escalator starts; Start PLC treater 5 detection port X0 after 3 seconds, first proximity transducer 2 transmits first signal procedure to port x 0 and begins to refresh the detection beginning.The teeth X 1 that drives duplex chain wheel 6 produces a signal A during through first proximity transducer, 2 induction end, and the teeth Y 3 that drives duplex chain wheel 6 produces a signal B during through the induction end of second proximity transducer 4, drives and continues rotation; So produce staggered impulse singla A-B-A-B-A-B ... Consistent through A to the time between the B, when reversing appears in staircase, in the process of the rotation direction of the regulation of traction machine change just; Will inevitably experience a transformation point that is lower than command speed; Until stopping oppositely directed then process, the time difference between the A-B changes speed from fast to slow, and the Time Calculation program in the PLC treater 5 begins computing and sends instruction; Y14, Y17, KBZ dead electricity, escalator is out of service.And stopping the output of Y12, Y14, Y15, Y16, Y17, escalator can not start once more, can turn round after must restarting system.Thereby realize the up reversal protection function of escalator/moving sidewalk.
Reversal protection function when staircase is descending is with up principle: it is descending that key switch SXY starts staircase, SXY through port x 6 to PLC treater 5 incoming signals, if port x 2 conductings of safety return circuit KJT; Through PLC treater 5 calculation process, mouth Y12 band-type brake KBZ gets electric, is path signal if X16 newspaper lock detects; Through PLC treater 5 calculation process; The up contactless switch of 1 rear port Y14 in second gets electric, and port Y16, Y17 star angle start electricly, and escalator starts; Start PLC treater 5 detection port X0 after 3 seconds, first proximity transducer 2 transmits first signal procedure to port x 0 and begins to refresh the detection beginning.The teeth X 1 that drives duplex chain wheel 6 produces a signal A during through first proximity transducer, 2 induction end, and the teeth Y 3 that drives duplex chain wheel 6 produces a signal B during through the induction end of second proximity transducer 4, drives and continues rotation; So produce staggered impulse singla A-B-A-B-A-B ... Consistent through A to the time between the B, when reversing appears in staircase, in the process of the rotation direction of the regulation of traction machine change just; Will inevitably experience a transformation point that is lower than command speed; Until stopping oppositely directed then process, the time difference between the A-B changes speed from fast to slow, and the program in the PLC treater 5 begins computing and sends instruction; Y15, Y17, KBZ dead electricity, escalator is out of service.And stopping the output of Y12, Y14, Y15, Y16, Y17, escalator can not start once more, can turn round after must restarting system.Thereby realize descending reversal protection function.
2. the control process of speed monitoring
Program begins to refresh detection beginning first proximity transducer 2 and begins to detect; First teeth X 1 that drives duplex chain wheel 6 produce during through first proximity transducer, 2 induction end a signal+; The room that driving continues to rotate to teeth X 1 and teeth Y 3 produce signal-, through teeth Y 3 produce again signal+, so staggeredly produce a uniform impulse singla; The impulse singla that when terraced speed reaches 1.2 times of command speed, produces changes; Time difference between two pulses changes, and the tally functions in the PLC treater 5 calculate hypervelocity and send instruction Y14, Y15, Y17, KBZ dead electricity, stop the output of Y12, Y14, Y15, Y16, Y17; Escalator can not start once more, can turn round after must restarting system.Thereby realize the overspeed protection function.
3. the control process of stop distance detecting
Start PLC treater 5 detection port X1 after 3 seconds, second proximity transducer 4 transmits first signal procedure to port x 1 and begins to refresh the detection beginning.Program begins to refresh to detect and begins; Second proximity transducer 4 begins to detect teeth X 1 and detected signal is transferred to port x 1; The teeth X 1 that drives duplex chain wheel 6 produce during through the sensor sensing end signal+, drive the room of continuing to rotate to teeth X 1 produce signal-, through teeth Y 3 produce again signal+; Uniform impulse singla of so staggered generation, PLC treater 5 takes advantage of the roller of duplex chain wheel to measure apart from equaling the stop distance through the number that calculates impulse singla.Stop scope like overflow customization, the programs in the PLC treater 5 begin computing and send instruction, and Y14, Y15, Y17, KBZ dead electricity stop the output of Y12, Y14, Y15, Y16, Y17, and escalator can not start once more, can turn round after must restarting system.
Claims (4)
1. the safety monitoring of an escalator/moving sidewalk and control system; It mainly comprises a PLC treater (5); It is characterized in that: it also comprises one first proximity transducer (2) and one second proximity transducer (4); First proximity transducer (2) and second proximity transducer (4) are installed on the support (8); Support (8) is installed on the standpipe (10) of truss (9); First proximity transducer (2) and second proximity transducer (4) obtain detection information and are sent to PLC treater (5) through cable (7) from teeth X (1) and the teeth Y (3) that drives duplex chain wheel (6); The operation that PLC treater (5) sends corresponding instruction control escalator/moving sidewalk through computing, take a turn for the worse, exceed the speed limit and exceed safe stop apart from the time, in time escalator/moving sidewalk is carried out effective stop.
2. according to the safety monitoring and the control system of the described escalator/moving sidewalk of claim 1; It is characterized in that: said PLC treater (5) detects since first signal refurbishing procedure that first proximity transducer (2) obtains after escalator starts 3 seconds; The teeth X (1) that drives duplex chain wheel (6) produces a signal A during through the induction end of first proximity transducer (2), and the teeth Y (3) that drives duplex chain wheel (6) produces a signal B during through the induction end of second proximity transducer (4); When reversing appears in escalator/moving sidewalk; Change in the process of the rotation direction of stipulating at traction machine; Speed is reverse then until stopping from fast to slow; Time difference between the signal A-signal B changes, and the Time Calculation program in the PLC treater (5) begins computing and sends instruction, cuts off control output.
3. according to the safety monitoring and the control system of the described escalator/moving sidewalk of claim 1; It is characterized in that: said first proximity transducer (2) begins to detect when escalator/moving sidewalk gets into permanent speed from starting; First teeth that drive duplex chain wheel (6) produce during through the induction end of first proximity transducer (2) signal+; Drive room that duplex chain wheel (6) continues to rotate to teeth produce signal-; Through second teeth produce again signal+; So staggeredly produce a uniform impulse singla, when the speed of staircase operation surpassed 1.2 times of command speed, the impulse singla that produces in the unit time increased; Tally function in the said PLC treater (5) is passed through the contrast computing, finds to exceed the speed limit and sends instruction cut-out control output immediately, and pass through the locking of PLC treater (5) internal processes.
4. according to the safety monitoring and the control system of the described escalator/moving sidewalk of claim 1; It is characterized in that: said second proximity transducer (4) is after starting 3 seconds; Port x 1 to PLC treater (5) transmits first signal, and program begins to refresh, and detects beginning; Second proximity transducer (4) begins to detect teeth X (1) and detected signal is transferred to port x 1; The teeth X (1) that drives duplex chain wheel (6) produce during through the induction end of second proximity transducer (4) signal+; Drive room that duplex chain wheel (6) continues to rotate to teeth produce signal-; Through teeth Y (3) produce again signal+, so staggeredly produce a uniform impulse singla, PLC treater (5) takes advantage of the roller of duplex chain wheel (6) to measure apart from equaling the stop distance through the number that calculates impulse singla; When stop is stopped scope apart from the overflow customization; Program in the PLC treater (5) begins computing and sends instruction, and Y14, Y15, Y17, KBZ dead electricity stop the output of Y12, Y14, Y15, Y16, Y17; Escalator/moving sidewalk can not start once more, can turn round after must restarting system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220220155 CN202609747U (en) | 2012-05-17 | 2012-05-17 | Safety monitoring and control system for escalator/moving walk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220220155 CN202609747U (en) | 2012-05-17 | 2012-05-17 | Safety monitoring and control system for escalator/moving walk |
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| CN202609747U true CN202609747U (en) | 2012-12-19 |
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| CN 201220220155 Expired - Fee Related CN202609747U (en) | 2012-05-17 | 2012-05-17 | Safety monitoring and control system for escalator/moving walk |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659013A (en) * | 2012-05-15 | 2012-09-12 | 大连连港电扶梯成套设备有限公司 | Safety monitoring and controlling system of escalator/moving sidewalk |
| WO2018108560A1 (en) | 2016-12-16 | 2018-06-21 | Inventio Ag | Person-transporting apparatus having a speed-measuring device |
| CN108975140A (en) * | 2018-08-28 | 2018-12-11 | 塞纳自动梯（佛山）有限公司 | A kind of escalator step tests the speed guard method and speed measuring device |
| CN111727164A (en) * | 2017-12-29 | 2020-09-29 | 通力电梯有限公司 | Escalator monitoring system, escalator monitoring method, sound data collection device and clamp used for escalator monitoring device |
| US11169170B2 (en) | 2017-04-19 | 2021-11-09 | Otis Elevator Company | Speed detection device of handrail of passenger conveyor and a speed detection method thereof |
-
2012
- 2012-05-17 CN CN 201220220155 patent/CN202609747U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659013A (en) * | 2012-05-15 | 2012-09-12 | 大连连港电扶梯成套设备有限公司 | Safety monitoring and controlling system of escalator/moving sidewalk |
| WO2018108560A1 (en) | 2016-12-16 | 2018-06-21 | Inventio Ag | Person-transporting apparatus having a speed-measuring device |
| TWI657993B (en) * | 2016-12-16 | 2019-05-01 | 瑞士商伊文修股份有限公司 | Passenger transport apparatus comprising speed measurement device |
| CN110088032A (en) * | 2016-12-16 | 2019-08-02 | 因温特奥股份公司 | Transport equipment for persons with velocity measuring device |
| US10737910B2 (en) | 2016-12-16 | 2020-08-11 | Inventio Ag | Person-transporting apparatus having a speed-measuring device |
| CN110088032B (en) * | 2016-12-16 | 2021-08-03 | 因温特奥股份公司 | People conveyor with speed measuring device |
| US11169170B2 (en) | 2017-04-19 | 2021-11-09 | Otis Elevator Company | Speed detection device of handrail of passenger conveyor and a speed detection method thereof |
| CN111727164A (en) * | 2017-12-29 | 2020-09-29 | 通力电梯有限公司 | Escalator monitoring system, escalator monitoring method, sound data collection device and clamp used for escalator monitoring device |
| CN111727164B (en) * | 2017-12-29 | 2023-04-14 | 通力电梯有限公司 | Escalator monitoring system, escalator monitoring method, sound data collection device and clamp used for escalator monitoring device |
| CN108975140A (en) * | 2018-08-28 | 2018-12-11 | 塞纳自动梯（佛山）有限公司 | A kind of escalator step tests the speed guard method and speed measuring device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20140517 |