CN109650240A - A kind of driving device based on escalator fault detection - Google Patents
A kind of driving device based on escalator fault detection Download PDFInfo
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- CN109650240A CN109650240A CN201910062986.8A CN201910062986A CN109650240A CN 109650240 A CN109650240 A CN 109650240A CN 201910062986 A CN201910062986 A CN 201910062986A CN 109650240 A CN109650240 A CN 109650240A
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- escalator
- junction box
- frequency converter
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- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 238000000819 phase cycle Methods 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 claims description 10
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B29/00—Safety devices of escalators or moving walkways
- B66B29/005—Applications of security monitors
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- Escalators And Moving Walkways (AREA)
Abstract
The invention discloses a kind of driving devices based on escalator fault detection, escalator includes control cabinet and motor, and driving device includes input terminal three-phase connection box, output end three-phase connection box, driving frequency converter, control terminal terminal box and at least three contactors；Wherein, input terminal three-phase connection box is connect with the three-phase output end of control cabinet；Output end three-phase connection box is connect with the three-phase input end of motor；Input terminal three-phase connection box also passes through contactor KM5 and connect with output end three-phase connection box；Frequency converter is driven, is connect respectively with input terminal three-phase connection box with output end three-phase connection box, wherein driving frequency converter is connect with phase sequence positive and negative each other with output end three-phase connection box by contactor KM6 and contactor KM7；Control terminal terminal box is connect with the operator of driving frequency converter, contactor KM5, contactor KM6, contactor KM7 and escalator detection device respectively, and the controllable driving frequency converter of operator works and control each contactor closing or opening.
Description
Technical Field
The invention relates to a driving device based on escalator fault detection, and belongs to the technical field of elevator fault detection.
Background
An escalator comprehensive detection system in the prior art is shown in fig. 1, and the escalator comprises a control cabinet and a motor; the detection system comprises: the driver is connected between the control cabinet and the motor in series and used for driving the escalator to simulate overspeed or reverse fault; the sensor is arranged on the escalator step or the handrail belt and is used for quantitatively detecting various speed signals; and the operator is connected with the driver and the sensor and can control the driver according to different detection items and collect and display the detected speed signal.
The drive function of the frequency converter is independently adopted in a driver of the existing escalator comprehensive detection system, but in actual use, the functional requirements of the driver can be really realized only by the frequency converter for the detection of a power frequency escalator, a full-frequency-conversion escalator and a bypass frequency-conversion escalator capable of manually switching operation modes; however, for the detection of the bypass frequency converter escalator which automatically switches the operation mode after starting (the starting mode cannot be switched manually), the functional requirements of the driver cannot be realized only by using the frequency converter. The working principle of the automatically switched bypass variable-frequency escalator is shown in fig. 2, when the escalator is normally started, a three-phase power supply is connected with a motor through a main switch, a frequency converter and a variable-frequency operation contactor KM1 (at the moment, the contactors KM2, KM3 and KM4 are all disconnected), and the escalator starts to operate; when the escalator is started up till the speed reaches the normal speed, the variable-frequency operation contactor KM1 is disconnected, then the power-frequency operation contactor KM2 and the operation direction contactor are attracted (the ascending contactor KM3 or the descending contactor KM4 are attracted, but the two contactors are not attracted at the same time), at the moment, the frequency converter is bypassed, and the escalator operates in a power-frequency mode. The bypass frequency conversion escalator has the advantages that: the frequency conversion is used during starting, so that the starting is stable and the impact is small; after the starting is finished, the automatic switching is carried out to the power frequency operation, the frequency converter is only used for starting, the requirement on the frequency converter is low, the cost can be reduced, and the reliability of the escalator is improved. However, in actual detection, if the existing detection system is used, only the frequency converter realizes the function of the driver, and a fault occurs, because after the frequency conversion of the bypass frequency conversion escalator is started and is switched to power frequency operation, the power loop loses power instantly (after the KM1 is disconnected, the KM2 is closed, so that the loop loses power instantly), the driver (the frequency converter) can detect the loss of power of the main loop and report the fault (which is the basic function of the frequency converter), the driver stops outputting, and the escalator cannot be driven to perform overspeed and non-operation reverse state, so the detection work of the escalator cannot be completed. Therefore, a driving device needs to be designed for the bypass variable frequency escalator to complete the detection work.
Escalator overspeed means that the speed of the escalator or moving walkway exceeds the normal operating speed.
Non-operation reversion means that the steps, the pedals or the adhesive tapes of the escalator or the moving sidewalk change the specified running direction under the non-manual operation state.
Disclosure of Invention
The invention provides a driving device based on escalator fault detection, which plays a role in driving the escalator to overspeed or reverse in the conventional escalator comprehensive detection system so as to simulate the escalator fault working condition, and prevents the occurrence of the situation of false alarm fault of the driving device caused by instantaneous power failure of a power circuit, so that the detection of a bypass variable-frequency escalator which cannot be manually switched is safer and more accurate.
The technical scheme of the invention is that the driving device based on escalator fault detection, the bypass variable frequency escalator comprises a control cabinet and a motor, and the driving device comprises an input end three-phase junction box, an output end three-phase junction box, a driving frequency converter, a control end junction box and a contactor; wherein the contactor comprises at least three contactors of a contactor KM5, a contactor KM6 and a contactor KM7,
the input end three-phase junction box is connected with the three-phase output end of the control cabinet;
the output end three-phase junction box is connected with the three-phase input end of the motor;
the input end three-phase junction box is also connected with the output end three-phase junction box through a contactor KM 5;
the driving frequency converter is respectively connected with the input end three-phase junction box and the output end three-phase junction box and used for driving the escalator to overspeed or reverse to simulate the fault working condition of the escalator, wherein the driving frequency converter is connected with the output end three-phase junction box in a positive and negative phase sequence through a contactor KM6 and a contactor KM7, so that the positive rotation or the reverse rotation of the motor can be realized by selectively closing the contactors;
and the control terminal box is respectively connected with the driving frequency converter, the contactor KM5, the contactor KM6, the contactor KM7 and an operator of the escalator detection device, and the operator can control the driving frequency converter to work and control the contactors to be closed or opened.
Furthermore, the driving device further comprises a power supply power-off monitoring relay K1, two input terminals of the power supply power-off monitoring relay K1 are connected with any two output terminals of three output terminals of the input end three-phase junction box, the output end of the power supply power-off monitoring relay K1 is connected with a control end junction box, and the operator can monitor the power supply power-off condition of the escalator control cabinet through the power supply power-off monitoring relay K1.
Further, the driving device further comprises a three-phase power supply phase sequence monitoring relay K2, three input terminals of the three-phase power supply phase sequence monitoring relay K2 are connected with three output terminals of an input end three-phase junction box, an output end of the three-phase power supply phase sequence monitoring relay K2 is connected with a control end junction box, and the operator can judge whether the current escalator state is in an ascending state or a descending state by monitoring the phase sequence of the three-phase power supply output by the input end three-phase junction box through the three-phase power supply phase sequence monitoring relay K2.
Preferably, each contactor is an ac contactor.
Further, the contactor KM6 and the contactor KM7 are a pair of interlocking commutation contactors for changing the phase sequence of the three-phase power outputted to the motor.
The invention has the beneficial effects that:
according to the driving device based on escalator fault detection, the driving frequency converter can drive the escalator to achieve simulation escalator fault working conditions such as overspeed or non-operation reversion, and the like, and the circuit branch of the contactor KM5 can prevent the situations of driver misinformation, stop working and the like caused by instant power failure of a power loop, so that fault detection of a bypass variable frequency escalator which cannot manually switch working modes is safer and more accurate.
Drawings
Fig. 1 is a schematic diagram showing a comprehensive detection system framework of an escalator in the prior art;
fig. 2 is a schematic circuit diagram of an automatically switched bypass variable frequency escalator according to the present invention;
fig. 3 is a schematic diagram of a driver circuit of a prior art escalator comprehensive detection system;
fig. 4 is a schematic circuit diagram of a driving device based on escalator fault detection according to an embodiment of the present invention;
fig. 5 is a circuit connection diagram of a driving apparatus based on escalator fault detection according to an embodiment of the present invention in use;
fig. 6 is a circuit connection diagram of a control terminal block according to an embodiment of the present invention.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items. The use of any and all examples, or exemplary language ("e.g.," such as "or the like") provided herein, is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
Referring to fig. 1-3, an escalator with a bypass frequency conversion, which is automatically switched, is detected by using a prior art escalator comprehensive detection system, and the escalator comprises a control cabinet and a motor; the detection system comprises: the driver is connected between the control cabinet and the motor in series and used for driving the escalator to simulate overspeed or reverse fault; the sensor is arranged on the escalator step or the handrail belt and is used for quantitatively detecting various speed signals; the operator is connected with the driver and the sensor and can control the driver according to different detection items and collect and display the detected speed signal; inside as shown in fig. 3, the drive is realized by separately adopting the frequency converter, when using the existing drive to detect the bypass frequency conversion escalator which can not be manually switched, because the escalator needs to be normally started, at first, one of the contactor KM3 'and the contactor KM 4' needs to be closed (the contactor KM3 'and the contactor KM 4' are interlocked and cannot be closed simultaneously) so as to enable the motor to be powered on and run, therefore, from the start, the frequency converter inside the drive is in a working state, when the control cabinet is powered off instantly, the frequency converter inside the drive can also be stopped due to power off, and the detection can not be continued. In order to prevent the situation, the invention improves the existing driver correspondingly and can replace the existing driver for the detection work of the escalator comprehensive detection system.
Referring to fig. 4-6, a driving device based on escalator fault detection is used for overspeed or non-operation reversal fault detection of a bypass variable frequency escalator which cannot be manually switched to a working mode, wherein the bypass variable frequency escalator comprises a control cabinet and a motor, and the driving device comprises an input end three-phase junction box, an output end three-phase junction box, a driving frequency converter, a control end junction box, a power failure monitoring relay K1, a three-phase power phase sequence monitoring relay K2 and three alternating current contactors, namely a contactor KM5, a contactor KM6 and a contactor KM 7; wherein,
the input end three-phase junction box is used for connecting the driving device with the escalator control cabinet, and outside the driving device, the terminals L1, L2 and L3 are respectively connected with a three-phase output line of the escalator control cabinet, and the phase sequence can not be distinguished when the terminals are connected with the control cabinet; in the driving device, terminals L1, L2 and L3 are respectively connected to input terminals 1, 2 and 3 of a contactor KM5, meanwhile, terminals L1, L2 and L3 are respectively connected to an input terminal R, S, T of a frequency converter, meanwhile, terminals L1, L2 and L3 are respectively connected to a three-phase power supply phase-sequence relay K2, and meanwhile, any two terminals of the terminals L1, L2 and L3 are respectively connected to an input terminal of a power supply power loss monitoring relay K1.
The output end three-phase junction box is used for connecting the driving device with the escalator motor, and outside the driving device, terminals L1 ', L2 ' and L3 ' are respectively connected with three phase lines of the motor, and the phase sequence can not be distinguished when the terminals are connected with the motor; inside the driving device, terminals L1 ', L2 ' and L3 ' are respectively connected to output terminals 4, 5 and 6 of contactor KM5, terminals L1 ', L2 ' and L3 ' are respectively connected to output terminals 4, 5 and 6 of contactor KM6, and terminals L1 ', L2 ' and L3 ' are respectively connected to output terminals 4, 5 and 6 of KM 7.
The control end wiring box is used for being connected with an operator of the detection system, the operator acquires the state information of the driving device through the control end wiring box and controls the operation of the driving device through the control end wiring box; in the driving device, the control end junction boxes are respectively connected with the control ports of the driving frequency converters and are used for controlling the work of the driving frequency converters; meanwhile, the control terminal box is connected with an output contact of a power supply power loss monitoring relay K1 and is used for monitoring whether a three-phase power supply input to the driving device by the control cabinet loses power or not; meanwhile, the control terminal junction box is connected with an output contact of a three-phase power supply phase sequence monitoring relay K2 and is used for monitoring the phase sequence of a three-phase power supply input to a driver (if a positive phase sequence is defined as ascending of the escalator, a negative phase sequence is descending of the escalator or is defined in the reverse direction, so that whether the current state of the escalator is in ascending or descending can be judged through the positive and negative phase sequences; meanwhile, the control terminal junction box is connected with a coil of the contactor KM5 and is used for controlling the attraction or disconnection of the contactor KM 5; the coil of the contactor KM6 is connected and used for controlling the closing or opening of the contactor KM 6; and the control terminal box is connected with the coils of the contactor KM7 and used for controlling the pull-in or the pull-out of the contactor KM7, and the connection of the control terminal box and each circuit module can not be distinguished by phase sequence.
The driving frequency converter is used for variable frequency driving of the motor, changes the rotating speed and the running direction of the motor and simulates fault working conditions of accidental overspeed, non-operation reversion and the like of the escalator. The three-phase input end R, S, T of the driving frequency converter is respectively connected with the L1, the L2 and the L3 of the input end three-phase junction box, the three-phase output end U, V, W of the driving frequency converter is connected with the input ends 1, 2 and 3 of the contactor KM6, the three-phase output end U, V, W of the driving frequency converter is connected with the input ends 3, 2 and 1 (or 2, 1 and 3, or 1, 3 and 2) of the contactor KM7, and the control end of the driving frequency converter is connected with the operator through the control end junction box. (if 1, 2 and 3 are defined as positive phase sequence, then 2, 3, 1 and 2 are also positive phase sequence, and 3, 2, 1, 3 and 2 are all negative phase sequence.)
The power supply power loss monitoring relay K1 is used for monitoring whether a three-phase power supply input into the driving device has a power loss condition, the input end of the power supply power loss monitoring relay K1 is respectively connected with any two terminals (such as L1 and L2, or L1 and L3, or L2 and L3) in an input end three-phase junction box, and the output contact of the power supply power loss monitoring relay K1 is connected with an operator through a control end junction box.
The three-phase power supply phase sequence monitoring relay K2 is used for monitoring the phase sequence of a three-phase power supply input into the driving device (judging whether the current escalator state is in an ascending state or a descending state), the input end of the three-phase power supply phase sequence monitoring relay K2 is respectively connected with the L1, the L2 and the L3 of the three-phase terminal box at the input end, and the output contact is connected with the operator through the control end terminal box.
The contactor KM6 and the contactor KM7 are a pair of interlocking reversing contactors for changing the phase sequence of a three-phase power supply output to a motor, input ends 1, 2 and 3 of the contactor KM6 are directly connected with a three-phase output end U, V, W of a driving frequency converter respectively, and output ends 4, 5 and 6 of the contactor KM6 are connected with L1 ', L2 ' and L3 ' of a three-phase junction box at the output end in a driving device respectively; input ends 1, 2 and 3 of the contactor KM7 are directly connected with a three-phase output end W, V, U (or V, U, W or U, W, V) of the driving frequency converter respectively (if U, V, W is defined as positive phase sequence, V, W, U and V are also positive phase sequence, W, V, U, W and V are negative phase sequence), and three-phase output ends 4, 5 and 6 of the contactor KM7 are directly connected with L1 ', L2 ' and L3 ' of an output end three-phase junction box in the driving device respectively.
In the detection, in the starting stage of the escalator, a contactor KM5 in the driving device is closed, a contactor KM6 and a contactor KM7 are both disconnected, at the moment, the driving device operates in a power frequency mode, the driving frequency converter is bypassed, and the escalator is normally started to operate; when the escalator is started successfully and runs stably, the contactor KM5 is disconnected, and according to the current running direction of the escalator, the rotating speed and the running direction of the motor are controlled through the mutual cooperation of the interlocked contactor KM6, the contactor KM7 (only one of the contactor KM6 and the contactor KM7 is closed, and cannot be closed at the same time) and the driving frequency converter, so that the fault working conditions of overspeed or non-operation reversion and the like are simulated; at the instant power failure moment in the process of starting the escalator by the control cabinet, the driving frequency converter is in a non-working state and is switched to a driving frequency converter running mode after running stably, so that the driving frequency converter can still drive the escalator to simulate a fault working condition, and the situation that the driving frequency converter cannot continuously finish fault detection due to failure of power failure, error reporting and stopping working can be avoided; the control of each circuit module of the driver in the detection is manually and/or automatically operated and controlled through an operator, when the driving frequency converter drives the escalator to simulate the fault working condition, the overspeed protection device or the reverse protection device of the escalator is started, all contactors of the control cabinet are disconnected, and therefore the input end three-phase junction box is powered off, and the power supply power loss monitoring relay K1 can detect that the control cabinet is powered off to judge that the overspeed protection device or the reverse protection device is started due to the fault of the escalator, so that the fault protection device is normal.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (5)
1. The utility model provides a drive arrangement based on automatic escalator fault detection, can be used to drive bypass frequency conversion automatic escalator and simulate the fault operating mode that overspeed or non-manipulation were reversed, bypass frequency conversion automatic escalator includes switch board and motor, its characterized in that: the driving device comprises an input end three-phase junction box, an output end three-phase junction box, a driving frequency converter, a control end junction box and a contactor; wherein the contactor comprises at least three contactors of a contactor KM5, a contactor KM6 and a contactor KM7,
the input end three-phase junction box is connected with the three-phase output end of the control cabinet;
the output end three-phase junction box is connected with the three-phase input end of the motor;
the input end three-phase junction box is also connected with the output end three-phase junction box through a contactor KM 5;
the driving frequency converter is respectively connected with the input end three-phase junction box and the output end three-phase junction box and used for driving the escalator to overspeed or reverse to simulate the fault working condition of the escalator, wherein the driving frequency converter is connected with the output end three-phase junction box in a positive and negative phase sequence through a contactor KM6 and a contactor KM7, so that the positive rotation or the reverse rotation of the motor can be realized by selectively closing the contactors;
and the control terminal box is respectively connected with the driving frequency converter, the contactor KM5, the contactor KM6, the contactor KM7 and an operator of the escalator detection device, and the operator can control the driving frequency converter to work and control the contactors to be closed or opened.
2. The escalator fault detection-based drive device of claim 1, wherein: still include power failure monitoring relay K1, two input terminals of power failure monitoring relay K1 are connected with two arbitrary output terminals in the three output terminal of input three-phase terminal box, power failure monitoring relay K1's output and control end junction box are connected, the operator accessible power failure monitoring relay K1 monitors the power failure situation of escalator switch board.
3. The escalator fault detection-based drive device of claim 1, wherein: the escalator control system is characterized by further comprising a three-phase power supply phase sequence monitoring relay K2, three input terminals of the three-phase power supply phase sequence monitoring relay K2 are connected with three output terminals of an input end three-phase junction box, the output end of the three-phase power supply phase sequence monitoring relay K2 is connected with a control end wiring box, and the operator can judge whether the current escalator state is ascending or descending by monitoring the phase sequence of a three-phase power supply output by the input end three-phase junction box through the three-phase power supply phase sequence monitoring relay K2.
4. The escalator fault detection-based drive device of claim 1, wherein: each contactor is an alternating current contactor.
5. The escalator fault detection-based drive device of claim 1, wherein: the contactor KM6 and the contactor KM7 are a pair of interlocking commutation contactors for changing the phase sequence of the three-phase power outputted to the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910062986.8A CN109650240B (en) | 2019-01-23 | 2019-01-23 | Driving device based on escalator fault detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910062986.8A CN109650240B (en) | 2019-01-23 | 2019-01-23 | Driving device based on escalator fault detection |
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| CN109650240B CN109650240B (en) | 2024-09-20 |
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| CN206051250U (en) * | 2016-09-29 | 2017-03-29 | 嘉联电梯有限公司 | A kind of bypass frequency conversion control system of public staircase |
| CN209618639U (en) * | 2019-01-23 | 2019-11-12 | 广东省特种设备检测研究院珠海检测院 | A kind of driving device based on escalator fault detection |
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- 2019-01-23 CN CN201910062986.8A patent/CN109650240B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030000798A1 (en) * | 2001-05-31 | 2003-01-02 | Williams Todd Y. | Universal escalator control system |
| KR20030017027A (en) * | 2001-08-23 | 2003-03-03 | 김동수 | Emergency situation sensing system of escalator |
| CN201056453Y (en) * | 2007-01-31 | 2008-05-07 | 武汉捷能自动化技术有限公司 | Energy-saving control device of escalator |
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| CN109650240B (en) | 2024-09-20 |
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