Belt type elevator capable of monitoring running state
By monitoring the current of the lifting drive motor and generating a real-time current curve, combined with a PLC processor and a host computer, the problem of difficulty in detecting abnormal operating conditions of belt-driven lifting platforms is solved, and real-time identification and timely alarm of abnormal conditions are realized.
Patent Information
- Application Number
- CN202421112286.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In the existing technology, abnormal operating conditions of belt-driven lifting platforms are difficult to detect in a timely manner. In particular, the switch signals of the HMI touch screen can only confirm that the movement has reached the position, but cannot confirm whether the status during the lifting process is normal.
By monitoring the operating current of the lifting drive motor, a real-time current curve is generated using a PLC processor and a host computer. Combined with a comparison module, an alarm module, and an identification module, abnormal states can be monitored and identified in real time, including belt slippage, insufficient braking force, and jamming.
It enables real-time monitoring of the elevator's operating status, allowing for timely detection and identification of abnormal conditions, thus improving the timeliness and accuracy of equipment maintenance.
Smart Images
Figure CN222434028U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of elevators, and in particular to a belt elevator capable of monitoring the operating status. Background Art
[0002] In the automobile manufacturing site, the elevator is the main tool for transporting the car body and is the key equipment of the automated production line. Most of the elevators in the automobile manufacturing automated production line are belt elevators, because the belt elevators not only have high conveying efficiency, flexible conveying lines, and low maintenance costs, but can also be more conveniently combined with other equipment in other automated production lines to form an automated automobile manufacturing production line.
[0003] The belt elevator rises and falls by belt drive. One end of the lifting belt is connected to the counterweight, and the other end is connected to the lifting part. The belt is installed on the elevator drive roller. The friction between the belt and the roller drives the lifting part up and down, and the roller is driven by the lifting drive motor to rotate.
[0004] However, when the belt elevator has abnormal phenomena such as belt slippage, insufficient brake force, and elevator jam, it is difficult for equipment maintenance personnel to promptly discover the abnormal operation status of the belt elevator. At present, in order to promptly discover the abnormal operation status of the belt elevator during operation, equipment maintenance personnel mainly use the existing HMI touch screen switch signal to visually confirm the operation of the elevator, but they can only confirm whether the elevator has moved in place, but cannot confirm whether the elevator is in normal state during the lifting process. Utility Model Content
[0005] The utility model provides a belt elevator capable of monitoring the operating status in order to solve the problem that the visual confirmation of the elevator operation through the existing HMI touch screen switch signal in the above-mentioned prior art solution can only confirm whether the elevator has moved to the right position, but cannot confirm whether the elevator is in a normal state during the lifting process. In this solution, the operating status of the elevator can be grasped in real time by monitoring the operating current of the lifting drive motor during the operation of the elevator.
[0006] The technical solution adopted by the utility model is: a belt-type elevator capable of monitoring the operating status, including an elevator and a monitoring system, the elevator including a frame, a lifting drive motor, a belt, a counterweight and a slide, the lifting drive motor is located at the top of the frame, the driving end of the lifting drive motor is fixedly connected to a roller, the two ends of the belt are respectively connected to the counterweight and the slide, the belt bypasses the roller, the monitoring system includes a lifting frequency converter for collecting the current data of the lifting drive motor, a plc processor for generating a real-time current waveform according to the current data of the lifting drive motor, and a host computer for displaying the real-time current waveform, the lifting drive motor, the lifting frequency converter, the plc processor and the host computer are connected in sequence. The host computer can also convert the real-time current waveform into a line graph, making the image look more intuitive.
[0007] When the lift starts to work, the lift drive motor starts to work, the lift is unlocked at the low position, the lift drive motor drives the roller to rotate, and the belt on the roller moves with the rotation of the roller, so that the slide rises and the counterweight block drops until the slide moves to the highest limit. At this time, the lift is locked at the high position, the slide is fixed on the frame, and then the car body enters the slide. After the car body enters the slide, the high position of the slide is unlocked, and the lift drive motor drives the roller to rotate in the opposite direction. At this time, the slide drops and the counterweight block rises until the slide drops to the lowest limit. At this time, the lift is locked at the low position, and the car body is removed from the slide, completing a car body handling work. When the lift drive motor starts to work, the current inside the lift drive motor will change. When the lift drive motor drives the slide to rise, the current of the lift drive motor increases; when the lift is locked at the high position, the current of the lift drive motor decreases; when the lift drives the slide to descend, the current of the lift drive motor increases again; when the lift is locked at the low position, the current of the lift drive motor decreases again. In the real-time current image displayed on the host computer, it can be seen that the graph line first rises and then tends to be flat, which is the flat segment 1, corresponding to the process of the slide rising; after the end of the flat segment 1, it will drop again, corresponding to the high-position locking of the elevator; after the drop, it will rise again and tend to be flat, which is the flat segment 2, corresponding to the process of the slide falling; after the end of the flat segment 2, it will drop again, corresponding to the low-position locking of the elevator. Since the time required for the slide to fall is shorter than the time required for the slide to rise, it can be seen in the image that the length of the flat segment 1 is greater than the length of the flat segment 2. When the belt slips, the current graph of the lifting drive motor will continue to rise; when the elevator brake force is insufficient, the current graph of the lifting drive motor will not rise again after falling; when the elevator is stuck, the current graph of the lifting drive motor will be jagged.
[0008] The belt elevator in this solution monitors the current of the lifting drive motor and uses the PLC processor and the host computer to generate the real-time current curve of the lifting drive motor. The operator can understand the operating status of the elevator during the lifting process in real time by observing the real-time current curve of the lifting drive motor.
[0009] Preferably, it also includes a comparison module, which is electrically connected to the plc processor. The comparison module is used to compare the real-time waveform of the current data of the lifting drive motor generated on the plc processor with the standard waveform of the current data of the lifting drive motor when it is working under the standard state, so that it can be discovered in time when the difference between the real-time waveform and the standard waveform is greater than the error amount. The error amount is 5mA to 10mA. When the real-time waveform of the lifting drive motor current image is compared with the standard waveform, if the difference is greater than the error amount, it means that the lifting drive motor is not working properly, that is, the elevator is abnormal during the lifting process. The setting of the comparison module enables the operator to promptly discover whether the elevator is in an abnormal state during the lifting process. It is found through experiments that when the error amount is greater than 5mA to 10mA, it can be determined that the working state of the lifting drive motor is abnormal, that is, the elevator is in an abnormal state during the lifting process. Its specific value can be adjusted according to different models of the lifting drive motor.
[0010] Preferably, an alarm module is also included, the alarm module is electrically connected to the comparison module, and the alarm module is used to sound an alarm when the difference between the real-time waveform and the standard waveform is greater than the error amount. The alarm module includes a warning light and a buzzer, and the warning light and the buzzer are fixedly connected to the elevator. After the comparison module finds that the working state of the lifting drive motor is abnormal, the alarm module can alarm in time to notify the operator that the elevator has an abnormality. The alarm module selects a buzzer and a warning light, so that the alarm module uses both sound and light to remind the operator when the alarm is sounded.
[0011] Preferably, it also includes an identification module, which is electrically connected to the comparison module. When the comparison module finds that the difference between the real-time waveform and the standard waveform is greater than the error amount, the identification module identifies the shape of the real-time waveform and determines the abnormal cause of the elevator according to the shape of the real-time waveform. When the comparison module finds that the real-time current image of the lifting drive motor is abnormal, the identification module identifies and analyzes the abnormal real-time current image of the lifting drive motor, and determines which condition the specific abnormality of the elevator belongs to according to the shape of the abnormal current image.
[0012] Preferably, a switch and a gateway are further included, wherein the switch is electrically connected to the PLC processor, and the gateway is electrically connected to the switch. The real-time current information of the lifting drive motor can be uploaded to the cloud server through the switch and the gateway, so that the operator can call up the operation data of the lift at any time.
[0013] Preferably, a first slide rail is provided at one end of the frame close to the slide, the axis of the first slide rail is parallel to the belt, and the slide is slidably connected to the first slide rail. A second slide rail is provided at one end of the frame close to the counterweight, the axis of the second slide rail is parallel to the belt, and the counterweight is slidably connected to the second slide rail. The first slide rail and the second slide rail are provided on the frame, and the first slide rail and the second slide rail can guide the counterweight and the slide respectively, further limiting the sliding direction of the counterweight and the slide when the lift is working.
[0014] Preferably, the slide is provided with a clamping part for clamping the vehicle body, and the clamping part is fixedly connected to the slide. The clamping part is arranged on the slide, and the transported vehicle body is fixed on the slide by the clamping part on the slide.
[0015] Compared with the prior art, the beneficial effect of the utility model is that the belt elevator in this scheme monitors the current of the lifting drive motor and uses the PLC processor and the host computer to generate the real-time current curve of the lifting drive motor. The operator can grasp the operating status of the elevator during the lifting process in real time by observing the real-time current curve of the lifting drive motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a module diagram of a monitoring system of a belt elevator capable of monitoring the operating status of the utility model;
[0017] Figure 2 It is a structural schematic diagram of a belt lift capable of monitoring the operating status of the utility model;
[0018] Figure 3 It is a module diagram of the monitoring system in Example 2 of the utility model, which is a belt elevator capable of monitoring the operating status. DETAILED DESCRIPTION
[0019] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.
[0020] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0021] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:
[0022] Example 1
[0023] like Figure 1-Figure 2 The embodiment 1 of a belt type elevator capable of monitoring the operation status is shown, including an elevator and a monitoring system, the elevator including a frame 1, a lifting drive motor 2, a belt 3, a counterweight 4 and a slide 5, the lifting drive motor 2 is located at the top of the frame 1, the driving end of the lifting drive motor 2 is fixedly connected to a roller 201, the two ends of the belt 3 are respectively connected to the counterweight 4 and the slide 5, the belt 3 bypasses the roller 201, the monitoring system includes a lifting frequency converter 6 for collecting the current data of the lifting drive motor 2, a plc processor 7 for generating a real-time current waveform according to the current data of the lifting drive motor 2, and a host computer 8 for displaying the real-time current waveform, the lifting drive motor 2, the lifting frequency converter 6, the plc processor 7 and the host computer 8 are connected in sequence. The host computer 8 can also convert the real-time current waveform into a line graph, so that the image looks more intuitive.
[0024] The working principle or working process of this embodiment is as follows: when the lift starts to work, the lift drive motor 2 starts to work, the lift low position is unlocked, the lift drive motor 2 drives the roller 201 to rotate, and the belt 3 on the roller 201 moves with the rotation of the roller 201, so that the slide 5 rises and the counterweight 4 falls, until the slide 5 moves to the highest limit, at which time the lift high position is locked, the slide 5 is fixed on the frame 1, and then the vehicle enters the slide 5. After the vehicle enters the slide 5, the high position of the slide 5 is unlocked, and the lift drive motor 2 drives the roller to rotate in the opposite direction, at which time the slide 5 falls and the counterweight 4 rises, until the slide 5 falls to the lowest limit, at which time the lift low position is locked, and the vehicle moves out of the slide 5, completing a vehicle transport work. When the lifting drive motor 2 starts to work, the current inside the lifting drive motor 2 will change. When the lifting drive motor 2 drives the slide 5 to rise, the current of the lifting drive motor 2 becomes larger; when the elevator is locked at the high position, the current of the lifting drive motor 2 becomes smaller; when the elevator drives the slide 5 to descend, the current of the lifting drive motor 2 becomes larger again; when the elevator is locked at the low position, the current of the lifting drive motor 2 becomes smaller again. It can be seen from the real-time current image displayed on the host computer 8 that the graph first rises and then tends to be flat, which is the flat segment 1, corresponding to the process of the slide 5 rising; after the end of the flat segment 1, it falls again, corresponding to the low position locking of the elevator; after falling, it rises again to tend to be flat, which is the flat segment 2, corresponding to the process of the slide 5 descending; after the end of the flat segment 2, it falls again, corresponding to the low position locking of the elevator. Since the time required for the slide 5 to descend is shorter than that for the slide 5 to rise, it can be seen in the image that the length of the flat segment 1 is greater than the length of the flat segment 2. When the belt 3 slips, the current graph of the lifting drive motor 2 will continue to rise; when the elevator braking force is insufficient, the current graph of the lifting drive motor 2 will not rise again after falling; when the elevator jams, the current graph of the lifting drive motor 2 will be jagged.
[0025] Beneficial effects of this embodiment: The belt 3-type elevator in this scheme monitors the current of the lifting drive motor 2 and uses the PLC processor 7 and the host computer 8 to generate a real-time current curve of the lifting drive motor 2. The operator can understand the operating status of the elevator during the lifting process in real time by observing the real-time current curve of the lifting drive motor 2.
[0026] Example 2
[0027] Embodiment 2 of a belt elevator capable of monitoring operating status, such as Figure 3 As shown, based on Example 1, the monitoring system is further limited.
[0028] Specifically, it also includes a comparison module 9, which is electrically connected to the PLC processor 7. The comparison module 9 is used to compare the real-time waveform of the current data of the lifting drive motor 2 generated by the PLC processor 7 with the standard waveform of the current data of the lifting drive motor 2 when it is working under the standard state, so as to timely find out when the difference between the real-time waveform and the standard waveform is greater than the error amount. The error amount is 5mA to 10mA.
[0029] Specifically, it also includes an alarm module 10, which is electrically connected to the comparison module 9, and is used to issue an alarm when the difference between the real-time waveform and the standard waveform is greater than the error amount. The alarm module 10 includes a warning light and a buzzer, and the warning light and the buzzer are fixedly connected to the elevator.
[0030] Specifically, it also includes an identification module 11, a switch 12 and a gateway 13. The identification module 11 is electrically connected to the comparison module 9. The identification module 11 is used to identify the shape of the real-time waveform and determine the abnormal cause of the elevator according to the shape of the real-time waveform when the comparison module 9 finds that the difference between the real-time waveform and the standard waveform is greater than the error amount. The switch 12 is electrically connected to the PLC processor 7, and the gateway 13 is electrically connected to the switch 12.
[0031] Beneficial effects of this embodiment: The setting of the comparison module 9 enables the operator to promptly discover whether the elevator is in an abnormal state during the lifting process. When the error is greater than 5mA to 10mA, it can be determined that the working state of the lifting drive motor 2 is abnormal, that is, the elevator is in an abnormal state during the lifting process, and its specific value can be adjusted according to the different models of the lifting drive motor. After the comparison module 9 finds that the working state of the lifting drive motor 2 is abnormal, the alarm module 10 can alarm in time to inform the operator that the elevator has an abnormality. The alarm module 10 selects a buzzer and a warning light so that the alarm module 10 uses sound and light to remind the operator when the alarm is issued. When the comparison module 9 finds that the real-time current image of the lifting drive motor 2 is abnormal, the identification module 11 identifies and analyzes the abnormal real-time current image of the lifting drive motor 2, and determines which condition the specific abnormality of the elevator belongs to according to the shape of the abnormal current image. The real-time current information of the lifting drive motor 2 can be uploaded to the cloud server through the switch 12 and the gateway 13, so that the operator can call up the operation data of the elevator at any time.
[0032] Example 3
[0033] Embodiment 3 of a belt elevator capable of monitoring the operating status further limits the structure of the elevator based on embodiment 1 or embodiment 2.
[0034] Specifically, a first slide rail is provided on one end of the frame 1 close to the slide 5, the axis of the first slide rail is parallel to the belt 3, and the slide 5 is slidably connected to the first slide rail. A second slide rail is provided on one end of the frame 1 close to the counterweight 4, the axis of the second slide rail is parallel to the belt 3, and the counterweight 4 is slidably connected to the second slide rail. The slide 5 is provided with a clamping portion for clamping the vehicle body, and the clamping portion is fixedly connected to the slide 5.
[0035] Beneficial effects of this embodiment: The first slide rail and the second slide rail are arranged on the frame 1, and the first slide rail and the second slide rail can guide the counterweight block 4 and the slide 5 respectively, and further limit the sliding direction of the counterweight block 4 and the slide 5 when the lift is working. A clamping part is arranged on the slide 5, and the transported vehicle body is fixed on the slide 5 through the clamping part on the slide 5.
[0036] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.
Claims
1. A belt elevator capable of monitoring the operating status, characterized in that: The invention comprises an elevator and a monitoring system, wherein the elevator comprises a frame (1), a lifting drive motor (2), a belt (3), a counterweight (4) and a slide (5), wherein the lifting drive motor (2) is located at the top of the frame (1), a driving end of the lifting drive motor (2) is fixedly connected to a roller (201), two ends of the belt (3) are respectively connected to the counterweight (4) and the slide (5), and the belt (3) passes around the roller (201). The monitoring system comprises a lifting frequency converter (6) for collecting current data of the lifting drive motor (2), a PLC processor (7) for generating a real-time current waveform according to the current data of the lifting drive motor (2), and a host computer (8) for displaying the real-time current waveform. The lifting drive motor (2), the lifting frequency converter (6), the PLC processor (7) and the host computer (8) are connected in sequence.
2. A belt elevator capable of monitoring the operating status according to claim 1, characterized in that: It also includes a comparison module (9), which is electrically connected to the PLC processor (7) and is used to compare the real-time waveform of the current data of the lifting drive motor (2) generated by the PLC processor (7) with the standard waveform of the current data of the lifting drive motor (2) when it is working under standard conditions, so as to timely discover when the difference between the real-time waveform and the standard waveform is greater than the error amount.
3. A belt elevator capable of monitoring the operating status according to claim 2, characterized in that: The error amount is 5 mA to 10 mA.
4. A belt elevator capable of monitoring the operating status according to claim 3, characterized in that: It also comprises an alarm module (10), the alarm module (10) being electrically connected to the comparison module (9), and the alarm module (10) being used to issue an alarm when the difference between the real-time waveform and the standard waveform is greater than the error amount.
5. A belt elevator capable of monitoring the operating status according to claim 4, characterized in that: The alarm module (10) comprises a warning light and a buzzer, and both the warning light and the buzzer are fixedly connected to the elevator.
6. A belt elevator capable of monitoring the operating status according to claim 2, characterized in that: It also includes an identification module (11), which is electrically connected to the comparison module (9). When the comparison module (9) finds that the difference between the real-time waveform and the standard waveform is greater than the error amount, the identification module (11) is used to identify the shape of the real-time waveform and determine the cause of the abnormality of the elevator based on the shape of the real-time waveform.
7. A belt elevator capable of monitoring operating status according to claim 1, characterized in that: It also includes a switch (12) and a gateway (13), wherein the switch (12) is electrically connected to the PLC processor (7), and the gateway (13) is electrically connected to the switch (12).
8. A belt elevator capable of monitoring operating status according to claim 1, characterized in that: A first slide rail is provided on one end of the frame (1) close to the slide (5); the axis of the first slide rail is parallel to the belt (3); and the slide (5) is slidably connected to the first slide rail.
9. A belt elevator capable of monitoring operating status according to claim 1, characterized in that: A second slide rail is provided on one end of the frame (1) close to the counterweight (4); the axis of the second slide rail is parallel to the belt (3); and the counterweight (4) is slidably connected to the second slide rail.
10. A belt elevator capable of monitoring operating status according to claim 1, characterized in that: The slide (5) is provided with a clamping portion for clamping the vehicle body, and the clamping portion is fixedly connected to the slide (5).