An elevator pit maintenance and positioning system
Through serial communication between the pit inspection board, the main control unit, and the external control board, combined with the pit inspection switch and the external control button, the automatic identification of the elevator pit inspection status and the rapid reset of the safety circuit are realized. This solves the problems of reset complexity and safety hazards in the existing technology, and improves the safety and convenience of elevator maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SJEC CORP
- Filing Date
- 2023-02-01
- Publication Date
- 2026-07-31
AI Technical Summary
The existing method for resetting elevator pits after maintenance is complex, cannot achieve a quick and safe reset, increases the complexity of the communication system, and poses safety hazards.
The system employs a pit inspection board, a main control unit, and an external call control board, connected via serial communication. Combined with the pit inspection switch, the bottom external call button, and the door lock conduction signal, it enables automatic reset of the elevator safety circuit, ensuring accurate identification of the maintenance status and switching of the safety mode.
It improves the safety and ease of resetting during pit maintenance, reduces modification costs, meets the resetting requirements of the new national standard, and avoids the occurrence of safety accidents.
Smart Images
Figure CN116040430B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of elevator maintenance control technology, and in particular to an elevator pit maintenance and repositioning system. Background Technology
[0002] The old standards for elevators did not include the concept of pit maintenance. Installation or maintenance personnel could only operate the elevators through the emergency electric control of the control cabinet or the car top. With the introduction of "GB T 7588.1-2020 Safety Specifications for Elevator Manufacturing and Installation Part 1: Passenger Elevators and Freight Elevators", relevant requirements for pit maintenance have been added.
[0003] Currently, during pit maintenance, the elevator system enters a safety mode, preventing the use of external call functions. After pit maintenance is complete, the elevator can only be restored to normal operation via an electrical reset device located outside the hoistway, accessible only to authorized personnel, such as those inside a lockable cabinet. This current reset method hinders maintenance personnel from quickly resetting the elevator after maintenance, increases the complexity of the communication system, and the dedicated electrical reset device cannot verify the elevator's maintenance status in real time. For example, if maintenance personnel inform the reset personnel that maintenance is complete before the elevator has even exited the pit, but the reset personnel have already reset the elevator while someone else is simultaneously pressing the external call button, the maintenance personnel risk being crushed by the elevator car, potentially leading to an accident. Therefore, the current elevator pit maintenance reset method urgently needs improvement and adjustment.
[0004] The above background information is provided only to assist in understanding the inventive concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application, nor does it necessarily provide technical teaching. In the absence of clear evidence that the above information was disclosed before the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention
[0005] To overcome the shortcomings of existing technologies, this invention provides an elevator pit inspection and relocation system, the specific technical solution of which is as follows:
[0006] An elevator pit inspection and repositioning system is provided, including a pit inspection plate, a main control unit and an external control board, wherein the pit inspection plate and the external control board are both connected to the main control unit via serial communication.
[0007] The pit inspection plate is used to mark the pit inspection status and output the marked status to the main control unit. The pit inspection plate is equipped with a pit inspection switch, which is located in the elevator pit. The pit inspection status is entered by operating the pit inspection switch. The external call control board is equipped with a ground floor external call button at the ground floor elevator lobby.
[0008] When the elevator is under maintenance in the pit, the elevator's safety circuit enters a safety mode, at which time the elevator cannot be made to move up or down by external means.
[0009] If the main control unit detects the reset signal of the pit maintenance switch, the door lock conduction signal of the bottom floor, and the trigger signal of the bottom floor external call button, it controls the elevator safety circuit to reset accordingly to eliminate the impact of pit maintenance on the elevator external call.
[0010] Furthermore, after the maintenance personnel open the bottom elevator door and enter the elevator pit, they close the bottom elevator door.
[0011] After the maintenance task in the elevator pit is completed, the maintenance personnel reset the pit maintenance switch, then open the bottom elevator door to exit. One maintenance personnel then continuously presses and holds the bottom elevator door open button to continuously output a trigger signal, while another maintenance personnel closes the bottom elevator door to output a door lock on signal. Correspondingly, when the main control unit first detects the reset signal of the pit maintenance switch and the bottom door lock off signal, and then simultaneously detects the bottom door lock on signal and the trigger signal of the bottom elevator door open button, the main control unit removes the pit maintenance status marked on the pit maintenance plate, causing the elevator's safety circuit to reset accordingly.
[0012] Furthermore, after the maintenance personnel open the bottom elevator door and enter the elevator pit, they close the bottom elevator door.
[0013] After the maintenance task in the elevator pit is completed, the maintenance personnel reset the pit maintenance switch, then open the bottom elevator door to exit, then close the bottom elevator door to output a door lock on signal, and finally press the bottom external call button to output a trigger signal. Correspondingly, when the main control unit receives the reset signal of the pit maintenance switch, the bottom door lock off signal, the bottom door lock on signal, and the trigger signal of the bottom external call button in sequence, the main control unit removes the pit maintenance status marked on the pit maintenance plate, so that the elevator's safety circuit is reset accordingly.
[0014] Furthermore, when the device is under maintenance in the pit, if the long press time of the bottom external call button reaches a preset time, the external call control board outputs a trigger signal to the main control unit.
[0015] Alternatively, when the pit is under maintenance, if the number of times the bottom external call button is pressed reaches a preset number within a preset time, the external call control board outputs a trigger signal to the main control unit.
[0016] Furthermore, the bottom-level external call button is an up button, and the trigger signal of the bottom-level external call button contains the bottom-level external call address information. The main control unit determines the floor number to which the trigger signal is output based on the external call address information.
[0017] Furthermore, the external control board is equipped with a bottom display board at the bottom elevator lobby. When the main control unit detects that the elevator has entered the pit for maintenance, it controls the bottom display board to show that it is in maintenance mode. When the safety circuit is reset, the main control unit controls the bottom display board to exit the display of maintenance mode.
[0018] Furthermore, the pit inspection plate is provided with a first button assembly for controlling the car's up and down movement during pit maintenance, and the car top inspection plate is provided with a second button assembly for controlling the car's up and down movement during car top maintenance. Both the first and second button assemblies are located within the elevator shaft. The pit inspection plate and the car top inspection plate are interlocked in controlling the elevator car's running direction. If the up and down commands of the first and second button assemblies conflict, the elevator stops its up and down movement.
[0019] Furthermore, a triangular lock is installed on the elevator door at the bottom floor. When the triangular lock is opened, the elevator door is opened, triggering a door lock disconnect signal output to the main control unit; when the triangular lock is closed, the elevator door is closed, triggering a door lock conduction signal output to the main control unit.
[0020] Furthermore, the elevator's safety circuit is equipped with a first safety switch assembly, which is linked to the pit inspection switch via a connecting handle to achieve switch linkage; when the pit inspection switch is pressed to enter the pit inspection state, the first safety switch assembly is simultaneously operated to cause the safety circuit to enter the safety mode.
[0021] Furthermore, the elevator's safety circuit is equipped with a second safety switch assembly, and the car top inspection plate is equipped with a car top inspection switch. The second safety switch assembly and the car top inspection switch are linked by a connecting handle to achieve switch linkage. When the car top inspection switch is pressed to enter the car top inspection state, the second safety switch assembly is simultaneously operated to make the safety circuit enter the safety mode.
[0022] Compared with the prior art, the present invention has the following advantages: by combining the bottom call signal and the door lock on / off signal to determine the timing of reset, the safety during pit maintenance is improved, the convenience of reset after maintenance is improved, and the cost of modifying the existing elevator maintenance system is low. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the safety circuit for pit inspection and repair in the elevator pit inspection and repair system provided in this embodiment of the invention;
[0024] Figure 2 This is a schematic diagram of the pit inspection and repair communication circuit in the elevator pit inspection and repair positioning system provided in an embodiment of the present invention;
[0025] Figure 3 This is a schematic diagram of the main control unit and external call communication circuit in the elevator pit inspection and repair positioning system provided in this embodiment of the invention.
[0026] The reference numerals in the attached drawings are as follows: 1-Main control unit, 2-Pit inspection plate, 21-Pit inspection switch, 31-First safety switch assembly, 32-Second safety switch assembly, 4-Car top inspection plate, 41-Car top inspection switch, 5-Emergency electric plate, 6-Front door outward call downward display plate, 7-Rear door outward call downward display plate, 8-Front door outward call upward display plate, 9-Rear door outward call upward display plate. Detailed Implementation
[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.
[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0029] In one embodiment of the present invention, an elevator pit inspection and repair repositioning system is provided, see [link to relevant documentation]. Figure 1 and Figure 2The system includes a pit inspection board 2, a main control unit 1, and an external call control board. Both the pit inspection board 2 and the external call control board are connected to the main control unit 1 via serial communication. The pit inspection board acts as a slave station of the main control unit, transmitting pit inspection status signals to the main control unit, but is not limited to transmitting pit inspection status signals. The pit inspection board is equipped with a pit inspection switch 21, which is located inside the elevator pit. Operating the pit inspection switch activates the pit inspection status. The external call control board has a ground floor external call button in the elevator lobby.
[0030] When maintenance personnel press the pit inspection switch, the elevator enters the pit inspection state. At this time, the elevator's safety circuit enters a safe mode, preventing the elevator from moving up or down via external calls. This is to avoid safety hazards caused by the car being moved during pit inspections. After the inspection is completed, only the pit inspection switch is reset; the pit inspection state is not yet exited. If the main control unit detects the reset signal of the pit inspection switch, the door lock conduction signal at the bottom floor, and the trigger signal of the external call button at the bottom floor, it controls the elevator's safety circuit to reset accordingly to eliminate the impact of pit inspection on external calls. At this point, the pit inspection state is exited, and the pit inspection state is reset.
[0031] The elevator pit inspection and reset system is divided into a multi-person reset mode and a single-person reset mode, which can be switched according to the number of people performing the inspection task.
[0032] The multi-person reset mode prioritizes safety, requiring the cooperation of two maintenance personnel to remove the pit inspection status marker and achieve a reset. Specifically, maintenance personnel open the bottom elevator door to enter the pit and then close it. After completing the inspection in the pit, they reset the pit inspection switch, open the bottom elevator door again, and exit. One personnel continuously presses the bottom external call button to output a trigger signal, while the other personnel closes the bottom elevator door to output a door lock on signal. The button is released only after the bottom elevator door is closed, ensuring that two people are required for the reset. Correspondingly, when the main control unit first detects the reset signal of the pit inspection switch and the bottom door lock off signal, and then simultaneously detects the bottom door lock on signal and the trigger signal of the bottom external call button, the main control unit removes the pit inspection status marker from the pit inspection plate, thus resetting the elevator's safety circuit.
[0033] In a preferred embodiment, if the main control unit first receives the reset signal from the pit inspection switch, and then simultaneously receives the bottom door lock activation signal and the bottom external call button trigger signal, the elevator's safety circuit will be reset accordingly. After maintenance personnel complete pit maintenance, they must first reset the pit inspection switch. They need to exit the pit and close the elevator door at the bottom lobby using the triangular lock, and simultaneously press the bottom external call button. This ensures that two people are simultaneously closing the triangular lock and triggering the bottom external call button at the lobby to complete the reset and improve safety.
[0034] Specifically, the authorized maintenance personnel press the corresponding switch in the pit, which marks the pit under maintenance status on the main control unit. After the authorized maintenance personnel complete the maintenance, they reset the pit maintenance switch. The main control unit still marks the pit under maintenance. At this time, the maintenance personnel open the ground floor hall door and leave the pit. There is a ground floor external call button outside the hall. The maintenance personnel press the up arrow on the ground floor external call button, and another person assists by using the triangular key unique to the authorized personnel to turn the door lock on and off until the maintenance status displayed on the external call button is exited, that is, the pit under maintenance status marked on the main control unit has been reset. At this time, the maintenance personnel release the up arrow on the ground floor external call button.
[0035] The single-person reset mode emphasizes independence, allowing a single maintenance personnel to perform repairs and reset independently. Specifically, the maintenance personnel open the bottom elevator door to enter the elevator pit and then close it. After completing the inspection in the pit, the personnel reset the pit inspection switch, open the bottom elevator door again to exit, close the bottom elevator door to output a door lock on signal, and finally press the bottom external call button to output a trigger signal. Correspondingly, when the main control unit receives the reset signal from the pit inspection switch, the bottom door lock off signal, the bottom door lock on signal, and the trigger signal from the bottom external call button in sequence, the main control unit removes the pit inspection status marked on the pit inspection plate, thus resetting the elevator's safety circuit accordingly.
[0036] In a preferred embodiment, to better align with the post-maintenance sequence and improve reset safety, different signals need to be received in a specific order to achieve a reset. Specifically, if the main control unit receives the reset signal from the pit maintenance switch, the bottom door lock activation signal, and the trigger signal from the bottom external call button in sequence, the elevator's safety circuit will reset accordingly. After maintenance personnel complete pit maintenance, they first need to reset the pit maintenance switch, then exit the pit to the bottom floor lobby to close the elevator door using the triangular lock, and finally press the bottom external call button. This reset process naturally integrates into the daily operations of maintenance personnel, is simple to operate, and ensures that no one is in the pit when the system resets.
[0037] The bottom-level external call button is an up-to-down button. The trigger signal of the bottom-level external call button contains the bottom-level external call address information. The main control unit determines the floor number from which the trigger signal is output based on the external call address information, thereby identifying the trigger signal from the bottom level. The trigger signal of the bottom-level external call button includes, but is not limited to, the following two methods:
[0038] The first method: When the device is under maintenance in the pit, if the long press time of the bottom external call button reaches the preset time, the external call control board outputs a trigger signal to the main control unit; for example, a long press for 2 seconds will trigger the device.
[0039] The second method: When the bottom external call button is under maintenance, if the number of times the button is pressed within a preset time reaches a preset number, the external call control board outputs a trigger signal to the main control unit; for example, it is triggered by being pressed twice in a row within 3 seconds.
[0040] The elevator door on the ground floor is equipped with a triangular lock. The door lock signal on the ground floor is switched via the triangular lock. Maintenance personnel need to open the triangular lock on the ground floor to open the elevator door on the ground floor in order to enter the pit for maintenance. When the triangular lock is opened, the elevator door is opened, triggering a door lock disconnect signal output to the main control unit; when the triangular lock is closed, the elevator door is closed, triggering a door lock conduction signal output to the main control unit.
[0041] The external call control board has a bottom-level display board in the elevator lobby. When the main control unit detects that the elevator has entered the pit for maintenance, it controls the bottom-level display board to show that it is in maintenance mode. When the safety circuit is reset, the main control unit controls the bottom-level display board to exit the maintenance mode display. Therefore, when maintenance personnel use the bottom-level external call button to perform the final reset operation, they can determine whether the reset has been successful by observing the display status of the bottom-level display board. Both the door lock on / off signal and the bottom-level external call address can be recognized by the main control unit. The door lock on / off signal is converted from high to low voltage and sent to the main board for acquisition. The external call link itself is connected to the main control unit via communication, allowing the main control unit to determine the serial number of the bottom-level external call display board.
[0042] In one embodiment of the present invention, the pit inspection plate is provided with a first button assembly for controlling the car's up and down movement during pit inspection, and the car top inspection plate 4 is provided with a second button assembly for controlling the car's up and down movement during car top inspection. Both the first and second button assemblies are located within the elevator shaft. The pit inspection plate and the car top inspection plate are interlocked in controlling the elevator car's running direction to meet the requirement that the elevator cannot run in the opposite direction but can run in the same direction. If the up and down commands of the first and second button assemblies conflict, the elevator stops its up and down movement. If the up and down commands of the first and second button assemblies are the same, the elevator performs the corresponding up and down movement.
[0043] In one embodiment of the present invention, the elevator safety circuit includes a first safety switch assembly 31 and a second safety switch assembly 32. The first safety switch assembly is linked to the pit inspection switch via a connecting handle to achieve switch linkage. When the pit inspection switch is pressed to enter the pit inspection state, the first safety switch assembly is simultaneously operated to cause the safety circuit to enter the safety mode. The car top inspection plate 4 includes a car top inspection switch 41. The second safety switch assembly is linked to the car top inspection switch via a connecting handle to achieve switch linkage. When the car top inspection switch is pressed to enter the car top inspection state, the second safety switch assembly is simultaneously operated to cause the safety circuit to enter the safety mode.
[0044] In one embodiment of the present invention, see Figure 2 and Figure 3 The elevator is a front and rear door type. The main control unit 1 is equipped with an emergency electric board 5, which is used to provide emergency power to the elevator system. The external display boards include a front door external display board 6 for downward movement, a rear door external display board 7 for downward movement, a front door external display board 8 for upward movement, and a rear door external display board 9 for upward movement. They are all connected to the main control unit through serial communication. The main control unit can identify the address information of each display board.
[0045] The elevator pit inspection and reset system provided by this invention uses the logical relationship between the pit inspection status signal, the door lock on / off signal, and the bottom call address to reset the pit inspection by pressing and holding the up button and turning the door lock on / off. This method does not require an external switch. The operation of the external call determines that the personnel have left the pit. The door lock on / off requires a triangular key, which cannot be operated by unauthorized personnel, thus meeting the reset requirements for pit inspection in the new national standard.
[0046] The above description is merely a preferred embodiment of the present invention and does not limit its patent scope. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, whether directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. An elevator pit service positioning system, characterized in that, It includes a pit maintenance board, a main control unit, and an external bidding control board, wherein the pit maintenance board and the external bidding control board are both connected to the main control unit via serial communication; The pit inspection plate is used to mark the pit inspection status and output the marked status to the main control unit. The pit inspection plate is equipped with a pit inspection switch, which is located in the elevator pit. The pit inspection status is entered by operating the pit inspection switch. The external call control board is equipped with a ground floor external call button at the ground floor elevator lobby. When the elevator is under maintenance in the pit, the elevator's safety circuit enters a safety mode, at which point the elevator cannot be moved up or down by external means. If the main control unit detects the reset signal of the pit maintenance switch, the door lock conduction signal of the bottom floor, and the trigger signal of the bottom floor external call button, it controls the elevator safety circuit to reset accordingly to eliminate the impact of pit maintenance on the elevator external call. The elevator's safety circuit is equipped with a first safety switch assembly, which is linked to the pit inspection switch via a connecting handle to achieve switch linkage; when the pit inspection switch is pressed to enter the pit inspection state, the first safety switch assembly is simultaneously operated to cause the safety circuit to enter the safety mode. The elevator pit inspection and reset system includes a multi-person reset mode and a single-person reset mode; after the maintenance personnel open the bottom elevator door and enter the elevator pit, the bottom elevator door is closed. Based on the multi-person reset mode, after the maintenance task in the elevator pit is completed, the maintenance personnel reset the pit maintenance switch, then open the bottom elevator door to exit. One maintenance personnel then continuously presses and holds the bottom elevator call button to output a trigger signal, while another maintenance personnel closes the bottom elevator door to output a door lock on signal. Correspondingly, when the main control unit first detects the reset signal of the pit maintenance switch and the bottom door lock off signal, and then simultaneously detects the bottom door lock on signal and the trigger signal of the bottom call button, the main control unit removes the pit maintenance status marked on the pit maintenance plate, causing the elevator's safety circuit to reset accordingly. Based on the single-person reset mode, after the maintenance task in the elevator pit is completed, the maintenance personnel reset the pit maintenance switch, then open the bottom elevator door to exit, then close the bottom elevator door to output a door lock conduction signal, and finally press the bottom external call button to output a trigger signal. Correspondingly, when the main control unit receives the reset signal of the pit maintenance switch, the bottom door lock disengagement signal, the bottom door lock conduction signal, and the trigger signal of the bottom external call button in sequence, the main control unit removes the pit maintenance status marked on the pit maintenance plate, so that the elevator's safety circuit is reset accordingly.
2. The elevator pit service reset system of claim 1, wherein, When the device is under maintenance in the pit, if the long press time of the bottom external call button reaches a preset time, the external call control board outputs a trigger signal to the main control unit. Alternatively, when the pit is under maintenance, if the number of times the bottom external call button is pressed reaches a preset number within a preset time, the external call control board outputs a trigger signal to the main control unit.
3. The elevator pit service reset system of claim 1, wherein, The bottom-level external call button is an up button. The trigger signal of the bottom-level external call button contains the bottom-level external call address information. The main control unit determines the floor number to output the trigger signal based on the external call address information.
4. The elevator pit service reset system of claim 1, wherein, The external control board has a bottom display board at the bottom elevator lobby. When the main control unit detects that the elevator has entered the pit for maintenance, it controls the bottom display board to show that it is in maintenance mode. When the safety circuit is reset, the main control unit controls the bottom display board to exit the maintenance mode display.
5. The elevator pit service reset system of claim 1, wherein, The pit inspection plate is equipped with a first button assembly for controlling the car's up and down movement during pit maintenance, and the car top inspection plate is equipped with a second button assembly for controlling the car's up and down movement during car top maintenance. Both the first and second button assemblies are located within the elevator shaft. The pit inspection plate and the car top inspection plate are interlocked in controlling the elevator car's running direction. If the up and down commands of the first and second button assemblies conflict, the elevator will stop moving up and down.
6. The elevator pit service reset system of claim 1, wherein, The elevator door on the ground floor is equipped with a triangular lock. When the triangular lock is opened, the elevator door opens, triggering a door lock disconnect signal output to the main control unit; when the triangular lock is closed, the elevator door closes, triggering a door lock conduction signal output to the main control unit.
7. The elevator pit service reset system of claim 5, wherein, The elevator's safety circuit is equipped with a second safety switch assembly, and the car top inspection plate is equipped with a car top inspection switch. The second safety switch assembly and the car top inspection switch are linked by a handle to achieve switch linkage. When the car top inspection switch is pressed to enter the car top inspection state, the second safety switch assembly is simultaneously operated to make the safety circuit enter the safety mode.