CN119137060A - Elevator emergency stop test device and elevator emergency stop test method - Google Patents
Elevator emergency stop test device and elevator emergency stop test method Download PDFInfo
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- CN119137060A CN119137060A CN202280095629.1A CN202280095629A CN119137060A CN 119137060 A CN119137060 A CN 119137060A CN 202280095629 A CN202280095629 A CN 202280095629A CN 119137060 A CN119137060 A CN 119137060A
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- emergency stop
- movement amount
- car
- stop device
- elevator
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 20
- SAZUGELZHZOXHB-UHFFFAOYSA-N acecarbromal Chemical compound CCC(Br)(CC)C(=O)NC(=O)NC(C)=O SAZUGELZHZOXHB-UHFFFAOYSA-N 0.000 claims 1
- 238000012790 confirmation Methods 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an elevator emergency stop test device and an emergency stop test method, which can improve the reliability or accuracy of operation confirmation of an emergency stop device. The elevator emergency stop test device confirms the operation state of an emergency stop device provided in an elevator, and comprises a motor control unit (101), wherein the motor control unit (101) enables a motor provided in a traction machine (50) to generate a prescribed torque in a state of enabling the emergency stop device to operate, and an emergency stop device operation detection unit (103), wherein the emergency stop device operation detection unit (103) confirms the operation state of the emergency stop device based on the rotation movement amount (dS) of a rope sheave provided in the traction machine and the movement amount (dC) of a car when the motor generates the prescribed torque.
Description
Technical Field
The present invention relates to an elevator emergency stop test apparatus and an elevator emergency stop test method for confirming operation of an emergency stop apparatus provided in an elevator.
Background
In order to bring the car into an emergency stop in a predetermined overspeed state, a governor and an emergency stop device are provided in an elevator apparatus. The car is coupled with the speed governor by means of a speed governor rope, and when an overspeed condition is detected, the speed governor operates the emergency stop device on the car side by tightening the speed governor rope, thereby emergency stopping the car.
In such an emergency stop device, an operation test is performed at the time of elevator installation, maintenance inspection, or the like, and the operation state is checked.
As a prior art related to an emergency stop test, a technique described in patent document 1 is known.
In this prior art, the governor is intentionally operated by remote operation or the like irrespective of the overspeed state of the car, and the emergency stop device is operated. In addition, by lifting the counterweight by means of a hydraulic jack, the main ropes between the drive sheave and the counterweight are loosened. Then, the brake is released to rotate the drive sheave, whereby the slack of the main rope on the counterweight side is moved to the main rope between the drive sheave and the car. At this time, it was confirmed by visual observation or the like from the landing side that the lowering of the car was suppressed and that the main rope on the car side was slackened.
Prior art literature
Patent literature
Patent document 1 Japanese patent laid-open No. 2008-189430
Disclosure of Invention
Technical problem to be solved by the invention
In the above-described conventional technique, it is difficult to confirm the descending inhibition of the car and the loosening of the main rope with high reliability or high accuracy by visual inspection or the like.
Accordingly, the present invention provides an elevator emergency stop test apparatus and an emergency stop test method capable of improving reliability or accuracy of operation confirmation of an emergency stop apparatus.
Technical means for solving the technical problems
In order to solve the above problems, an elevator emergency stop test apparatus for confirming an operation state of an emergency stop device provided in an elevator, the elevator emergency stop test apparatus comprises a motor control unit for generating a predetermined torque by a motor provided in a hoisting machine in a state in which the emergency stop device is operated, and an emergency stop device operation detection unit for confirming an operation state of the emergency stop device based on a rotational movement amount of a sheave provided in the hoisting machine and a movement amount of a car when the motor generates the predetermined torque.
In order to solve the above problems, an elevator emergency stop test method of the present invention is for confirming an operation state of an emergency stop device provided in an elevator, wherein the emergency stop device is operated, and then a motor provided in a hoisting machine is caused to generate a predetermined torque, and the operation state of the emergency stop device is confirmed based on a rotational movement amount of a sheave provided in the hoisting machine and a movement amount of a car when the motor generates the predetermined torque.
Effects of the invention
According to the present invention, the reliability and accuracy of the operation confirmation of the emergency stop device are improved.
The problems, structures, and effects other than those described above will become more apparent from the following description of the embodiments.
Drawings
Fig. 1 is a schematic configuration diagram of an elevator apparatus according to an embodiment.
Fig. 2 is a functional block diagram showing the structure of an elevator control device in the embodiment.
Fig. 3 is a waveform diagram showing torque command values in torque control executed by the motor control unit 101 (fig. 2) at the time of an operation test of the emergency stop device.
Fig. 4 is a flowchart showing an operation of the elevator control apparatus according to the embodiment in an operation test of the emergency stop apparatus.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings, based on the following examples. In the drawings, the same structural elements are denoted by the same structural elements or structural elements having similar functions.
Fig. 1 is a schematic configuration diagram of an elevator apparatus according to an embodiment of the present invention.
As shown in fig. 1, a car 3 and a counterweight 4 are connected to one end portion and the other end portion of the main rope 2, respectively. The main rope 2 is wound around a sheave 51 and a direction changing sheave 52 of the hoisting machine 50. Thereby, the car 3 and the counterweight 4 are suspended in the hoistway 1.
The motor provided in the hoisting machine 50 is driven and controlled by the elevator control device 100, and when the sheave 51 rotates, the main rope 2 is driven by the sheave 51. Thereby, the car 3 and the counterweight 4 move in directions opposite to each other up and down within the hoistway 1. The car 3 is guided to move by car guide rails 5, and the counterweight 4 is also guided to move by counterweight guide rails, not shown.
In the present embodiment, a three-phase synchronous motor such as a permanent magnet synchronous motor is applied as the motor. Accordingly, the motor is driven by three-phase alternating current supplied from the elevator control device 100 via the cable 300.
The traction machine 50 includes an electromagnetic brake 53. When stopping the car 3, the electromagnetic brake 53 brakes the rotation of the hoisting machine 50. As the electromagnetic brake 53, for example, a disc-type electromagnetic brake is applied.
In the present embodiment, the traction machine 50 includes a plurality of (2 in fig. 1) electromagnetic brakes 53. The plurality of electromagnetic brakes 53 are uniformly and directly operated, and constitute a multi-system brake (a dual-system brake in fig. 1).
An emergency stop device 11 is provided at the lower part of the car 3. The emergency stop device 11 operates when the car 3 enters an overspeed state, clamps the guide rail 5 with a pair of stoppers (not shown), and decelerates the car 3 by frictional force acting between the stoppers and the guide rail 5 to make the car stop emergently.
In a machine room provided in the hoistway 1, a speed governor 8 is provided to operate the emergency stop device 11 in addition to the hoisting machine 50 and the elevator control device 100. An endless governor rope 10 is wound around a pulley of the governor 8. The governor rope 10 is also wound around a tensioning sheave 9 located in the lower part of the hoistway 1 and applying tension to the governor rope 10.
The governor rope 10 is engaged with the emergency stop device 11 via an operating mechanism 12. Therefore, the sheave of the governor 8 rotates because the governor rope 10 is driven by the movement of the car 3. The governor 8 includes a gripping mechanism that grips the governor rope 10 and stops the movement of the governor rope 10 when the descending speed of the car 3 exceeds a predetermined value (for example, a speed not exceeding 1.4 times the rated speed). The governor 8 includes a vibrator mechanism that rotates together with the pulley. The vibrator mechanism is driven by centrifugal force, and when the descending speed of the car 3 exceeds a predetermined value, the grip mechanism is operated to operate.
When the movement of the governor rope 10 is stopped by the governor 8, the operation mechanism 12 engages with the governor rope 10, and thus the movement is stopped together with the governor rope 10. At this time, the car 3 continues to descend. Thus, the operating mechanism 12 moves in an upward direction with respect to the car 3. Thereby, the operating mechanism 12 operates the emergency stop device 11 to operate. Thus, the car 3 is decelerated and stopped urgently.
In the case of performing the operation test of the emergency stop device 11 as described above, the elevator control device 100 controls the motor provided in the hoisting machine 50 to generate a predetermined torque in a state where the emergency stop device 11 is operated. At this time, the elevator control device 100 controls the motor so that a predetermined torque greater than the rated torque is generated in the direction in which the car 3 descends, that is, in the direction in which a pair of braking members (not shown) in the emergency stop device 11 engage the guide rail 5.
The elevator control device 100 determines the operating state of the emergency stop device 11 based on the amount of movement in the descending direction of the car 3 and the amount of rotational movement of the sheave 51 when the motor generates torque.
The elevator control device 100 calculates the amount of rotational movement of the sheave 51 based on the rotational position detection signal of the motor encoder 201. The elevator control device 100 calculates the movement amount of the car 3 based on the rotational position detection signal of the governor encoder 202.
The elevator control device 100 compares the calculated rotational movement amount of the sheave 51 with the calculated movement amount of the car 3, and determines that the emergency stop device 11 is operating normally when the rotational movement amount of the sheave 51 is greater. The amount of rotation of the sheave 51 corresponds to the length of movement of the main rope 2 toward the car 3. Therefore, when the rotational movement amount of the sheave 51 is larger, the movement length of the main rope 2 is longer than the movement amount of the car. That is, the main rope 2 is slackened on the car side. Such slackening of the main rope 2 indicates that the car 3 is normally stopped by the emergency stop device 11.
The elevator control device 100 generally controls the operation of the car 3 based on the rotational position detection signal of the governor encoder 201. In the present embodiment, the governor encoder 202 is generally used for overspeed detection of a car or the like. The safety control device, not shown, detects the speed of the car 3 based on the rotational position detection signal of the governor encoder 202, and when the detected speed exceeds a predetermined overspeed (for example, a speed not exceeding 1.3 times the rated speed), cuts off the power supply to bring the car 3 to an emergency stop. The governor encoder 202 may be attached to the governor 8 during an operation test of the emergency stop device 11.
Fig. 2 is a functional block diagram showing the configuration of an elevator control apparatus in the present embodiment.
The elevator control device 100 includes a motor control unit 101, an emergency stop device operation confirmation mode access unit 102, an emergency stop device operation detection unit 103, a sheave movement amount calculation unit 104, a car movement amount calculation unit 105, and an initial position storage unit 106.
The motor control unit 101 controls the operation of the motor of the hoisting machine 50 and the operation of the electromagnetic brake 53. In the normal operation mode, the motor control unit 101 controls the motor of the hoisting machine 50 and the electromagnetic brake 53 to drive and stop the car according to a call registered by the elevator user.
The emergency stop device operation confirmation mode access unit 102 switches the operation mode of the motor control unit 101 from the normal operation mode to the emergency stop device operation confirmation mode when the operation test of the emergency stop device 11 is performed. In the emergency stop operation confirmation mode, the motor control unit 101 releases the electromagnetic brake 53 in a state where the emergency stop 11 is operated, and executes torque control of the motor so that the motor of the hoisting machine 50 generates a predetermined torque according to a torque command value described later. The torque command value is supplied to the motor control unit 101 by the emergency stop device operation confirmation mode access unit 102, or the motor control unit 101 is held in advance and activated in the emergency stop device operation confirmation mode.
The emergency stop device operation confirmation mode access unit 102 operates by a maintenance technician operating a maintenance switch provided in the elevator control device 100 or a maintenance terminal communicably connected to the elevator control device 100, and sets the operation mode of the motor control unit 101 to the emergency stop device operation confirmation mode.
The sheave movement amount calculation unit 104 calculates the rotational movement amount dS of the sheave 51 from the rotational position detection signal S1 output from the motor encoder 201.
The car movement amount calculation unit 105 calculates the movement amount dC of the car 3 based on the rotational position detection signal S2 output from the governor encoder 202.
The emergency stop device operation detection unit 103 detects that the emergency stop device 11 is operating based on the rotational movement amount dS of the sheave 51 calculated by the sheave movement amount calculation unit 104 and the movement amount dC of the car 3 calculated by the car movement amount calculation unit 105.
The initial position storage 106 records an initial value PS0 of the rotational position of the sheave 51 and an initial value PC0 of the car position. These initial values PS0 and PC0 are values immediately before the start of the operation test of the emergency stop device 11, and at the start of the operation test, the values recorded by the motor control unit 101 are recorded in the initial position storage unit 106.
The emergency stop device operation detection unit 103 calculates and stores the rotational position of the sheave 51 and the car position at the time of the operation test of the emergency stop device 11 based on the initial values PS0 and PC0, and the rotational movement amount dS of the sheave 51 and the movement amount dC of the car 3. In the present embodiment, the respective movement amounts are detected based on the difference between the respective positions of the sheave 51 and the car 3 detected by the encoder at the time of the emergency stop test and the respective initial positions.
Fig. 3 is a waveform diagram showing torque command values in torque control executed by the motor control unit 101 (fig. 2) in an operation test of the emergency stop device 11.
In the embodiment of fig. 3, the torque T is represented by pu values with reference (=1) to the rated torque.
As shown in fig. 3, the torque command value increases stepwise from the rated torque T1 (=1) in a plurality of stages (t1→t2→t3). In this embodiment, t2=1.5, t3=2.
The motor control unit 101 performs control based on the torque command value shown in fig. 3, and the sheave movement amount calculation unit 104 (fig. 2) calculates the rotational movement amount dS of the sheave 51 and the car movement amount calculation unit 105 (fig. 2) calculates the movement amount dC of the car 3 during the period in which the motor generates torque, that is, at t1 to t3 in fig. 3, respectively.
The emergency stop device operation detection unit 103 (fig. 2) determines whether the emergency stop device 11 is operating normally based on the rotational movement amount dS of the sheave 51 and the movement amount dC of the car 3 when the motor generates the torque T3. The emergency stop operation detection unit 103 (fig. 2) stores calculated values of the rotational movement amount dS of the sheave 51 and the movement amount dC of the car 3 when the motor generates the torques T1, T2, and T3. From these calculated values, the operation state of the emergency stop device 11 can be analyzed.
According to the torque command value shown in fig. 3, by increasing the torque generated by the motor to the torque T3 for confirming the operation of the emergency stop device 11 in a plurality of stages, pulsation of the sheave with the increase of the torque can be suppressed. Therefore, the operation of the emergency stop device 11 can be confirmed stably. As shown in fig. 3, the torque T increases from T1 to T2 in a slope manner during time T12, and increases from T2 to T3 in a slope manner during time T23. This can further suppress pulsation of the sheave with an increase in torque.
Fig. 4 is a flowchart showing an operation of the elevator control apparatus 100 according to the present embodiment in an operation test of the emergency stop apparatus 11.
In the present embodiment, the elevator control device 100 includes a computer system such as a microcomputer, and executes a predetermined program by the computer system to perform a process in an operation test of the emergency stop device 11.
Steps S2 to S8 described below are processes performed by the elevator control apparatus 100. Steps S1, S9, S10 are processes performed by a maintenance technician.
In step S1, the maintenance technician operates the governor manually or remotely to operate the emergency stop device irrespective of the overspeed state of the car. For example, after operating the governor in a stopped state of the car, the maintenance technician lowers the car at a low speed in a maintenance operation mode, thereby operating the emergency stop device.
Next, in step S2, the elevator control device 100 sets the self-operation mode to the emergency stop device operation confirmation mode by the emergency stop device operation confirmation mode access unit 102.
Next, in step S3, the elevator control device 100 records an initial value PS0 of the rotational position of the sheave 51 and an initial value PC0 of the car position in the initial position storage 106.
Next, in step S4, the elevator control device 100 determines whether or not recording of the initial value PS0 of the rotational position of the sheave 51 and the initial value PC0 of the car position is completed. When the elevator control device 100 determines that it is completed (yes in step S4), it proceeds to step S5, and when it is determined that it is not completed (no in step S4), it proceeds to step S3 again.
In step S5, the elevator control device 100 starts constant torque control of the motor of the hoisting machine 50 by the motor control unit 101, and generates torque in the motor.
Next, in step S6, the elevator control device 100 calculates the rotational movement amount dS of the sheave 51 and the movement amount dC of the car 3 by the sheave movement amount calculating unit 104 and the car movement amount calculating unit 105, respectively, for the torques T1, T2, and T3 shown in fig. 3.
Next, in step S7, the elevator control device 100 determines whether or not the operation in the emergency stop operation confirmation mode, that is, the torque up to the torque T3 for confirming the operation of the emergency stop 11 is generated, and the rotational movement amount dS of the sheave 51 and the movement amount dC of the car 3 are calculated. When the elevator control device 100 determines that the operation is completed (yes in step S7), the process proceeds to step S8, and when the operation is not completed (no in step S7), the process proceeds to step S5 again.
In step S8, the elevator control device 100 determines whether or not the rotational movement amount dS is larger than the movement amount dC for the rotational movement amount dS of the sheave 51 and the movement amount dC of the car 3 calculated in step S6 with respect to the torque for confirming the emergency stop operation that is larger than the rated torque, in this embodiment, the torque T3 (fig. 3) by the emergency stop operation detection unit 103.
When the elevator control device 100 determines that dS is greater than dC (yes in step S8), that is, when it is confirmed that the main rope 2 on the car 3 side is slackened, then the maintenance technician performs step S9. When the elevator control device 100 determines that dS is not greater than dC, that is, that dS is not greater than dC (no in step S8), that is, that the main rope 2 on the car 3 side cannot be confirmed to be slack, the maintenance technician then executes step S10.
In step S10, the maintenance technician does not confirm the slack of the main rope 2 in step S8, and considers that the emergency stop device 11 is not operating normally, and thus, the emergency stop device 11 is returned from the operating state and checked, and a maintenance operation such as an adjustment operation is performed on the emergency stop device 11. After performing step S10, the maintenance technician performs step S1 again.
In step S9, the maintenance technician confirms that the main rope 2 is slackened in step S8, and considers that the emergency stop device 11 is operating normally, and therefore weo returns the operation mode of the motor control unit 101 to the normal operation mode after the emergency stop device 11 is returned from the operating state, and operates the maintenance switch or the maintenance terminal. Thereby, the elevator control device 100 ends the series of processes.
According to the above embodiment, the operational state of the emergency stop device 11 is detected based on the rotational movement amount dS of the sheave 51 and the movement amount dC of the car 3, thereby improving the reliability or accuracy of the operation confirmation of the emergency stop device.
The present invention is not limited to the above-described embodiments, and various modifications are also included. For example, the above-described embodiments are described in detail for the purpose of understanding the present invention, and the present invention is not necessarily limited to include all the structures described. In addition, a part of the structure of the embodiment can be added, deleted, or replaced with another structure.
For example, the elevator apparatus may be a so-called machine-roomless elevator in which a hoisting machine or an elevator control apparatus is provided in a hoistway.
Description of the reference numerals
1 Hoistway, 2 main ropes, 3 car, 4 counterweight, 5 guide rail, 8 governor, 9 tension sheave, 10 governor rope, 11 emergency stop device, 12 operating mechanism, 50 traction machine, 51 sheave, 52 direction switching sheave, 53 electromagnetic brake, 100 elevator control device, 101 motor control part, 102 emergency stop device operation confirmation mode access part, 103 emergency stop device operation detection part, 104 sheave movement calculation part, 105 car movement calculation part, 201 motor encoder, 202 governor encoder, 300 cable.
Claims (6)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2022/026178 WO2024004122A1 (en) | 2022-06-30 | 2022-06-30 | Device for testing emergency stop of elevator and method for testing emergency stop of elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119137060A true CN119137060A (en) | 2024-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280095629.1A Pending CN119137060A (en) | 2022-06-30 | 2022-06-30 | Elevator emergency stop test device and elevator emergency stop test method |
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| Country | Link |
|---|---|
| JP (1) | JPWO2024004122A1 (en) |
| CN (1) | CN119137060A (en) |
| WO (1) | WO2024004122A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011042435A (en) * | 2009-08-19 | 2011-03-03 | Toshiba Elevator Co Ltd | Elevator |
| JP2013124156A (en) * | 2011-12-14 | 2013-06-24 | Hitachi Ltd | Elevator system, elevator pulley groove diagnosis device, and elevator pulley groove diagnosis method |
| JP6599649B2 (en) * | 2015-06-05 | 2019-10-30 | 三菱電機ビルテクノサービス株式会社 | Position adjustment method for governor tension gear |
| JP6530348B2 (en) * | 2016-05-09 | 2019-06-12 | 東芝ホームテクノ株式会社 | Cooker |
| ES2987224T3 (en) * | 2020-06-16 | 2024-11-14 | Kone Corp | Detection system for abnormal situation during elevator operation |
| CN115734931B (en) * | 2020-06-26 | 2023-06-16 | 三菱电机楼宇解决方案株式会社 | Elevator system and inspection terminal |
-
2022
- 2022-06-30 WO PCT/JP2022/026178 patent/WO2024004122A1/en active Application Filing
- 2022-06-30 CN CN202280095629.1A patent/CN119137060A/en active Pending
- 2022-06-30 JP JP2024530194A patent/JPWO2024004122A1/ja active Pending
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| JPWO2024004122A1 (en) | 2024-01-04 |
| WO2024004122A1 (en) | 2024-01-04 |
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