Roller changing trolley operation state self-diagnosis method
By installing a cable turntable and laser detection device on the roll changing trolley, the torque and position deviation are detected, which solves the problems of jamming and derailment of the roll changing trolley during the roll changing process, realizes self-diagnosis and self-repair, and ensures the stable operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANXI TAIGANG STAINLESS STEEL CO LTD
- Filing Date
- 2024-03-19
- Publication Date
- 2026-07-24
AI Technical Summary
In the existing technology, hot rolling roll changing trolleys are prone to damage during roll changing due to problems such as jamming, derailment and cable damage, which can lead to equipment damage and make it impossible to achieve self-diagnosis and self-repair of position errors.
The roll changing trolley, driven by a variable frequency motor, is equipped with a cable turntable, an output torque detector, and a laser detection device. By detecting torque, laser position deviation, and cable rotation status, it achieves self-diagnosis and position correction to prevent malfunctions.
It enables self-diagnosis of the roller changing trolley's operating status and self-repair of position errors, preventing equipment failures and ensuring stable equipment operation.
Smart Images
Figure CN118180154B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a roll changing trolley. Background Technology
[0002] When hot rolling mills use a roll-changing trolley to change rolls, during the roll-changing operation, if the roll becomes jammed due to the roll or other reasons, the sudden increase in torque of the roll-changing trolley's travel motor can damage the roll-changing trolley's reducer and motor. If the roll-changing trolley's travel position encoder experiences a wiring or connection failure with the mechanical equipment, resulting in incorrect position feedback, the roll-changing trolley may run off its travel track. Incorrect roll positioning or wear on the roll's bottom slide plate can also cause the roll-changing trolley to derail during travel. Furthermore, if the roll-changing trolley's cable reel fails to rotate synchronously with the roll during travel for other reasons, the cable may be crushed and damaged.
[0003] Based on the example, the torque control and torque judgment program under the control of the frequency converter, the positioning correction program combined with the grating, the position deviation judgment of the laser grating, and the abnormal judgment and detection program of the cable turntable are used to prevent the above faults from occurring, so as to realize the self-diagnosis of the running status of the roller changing trolley. Summary of the Invention
[0004] The technical problem to be solved by this invention is: how to realize the self-diagnosis of the running status of the roller changing trolley and perform self-repair of position errors to achieve stable equipment operation.
[0005] The technical solution adopted in this invention is: a self-diagnostic method for the operating status of a roll changing trolley. A cable turntable 3 is installed on a roll changing trolley 1 driven by a variable frequency motor. An output torque detector is installed on the variable frequency motor. Cables 5 on the cable turntable 3 are connected to cable fixing points 4. The roll changing trolley 1 runs on a track 2. A laser emitting device 6 is installed on the roll changing trolley 1. A first laser detection device 7 and a second laser detection device 8 are installed on both sides of the roll changing channel. The laser emitting device 6 simultaneously emits a laser beam to both sides of the roll changing channel. The two laser beams are on a straight line, and this straight line is perpendicular to the track 2 where the roll changing trolley 1 is located. During the operation of the roll changing trolley 1, when the torque detector detects that the output torque of the variable frequency motor is not less than the set output torque, and the first laser detection device 7 and the second laser detection device 8 detect that the roll changing trolley 1 has stopped, if the feedback current of the variable frequency motor is within 0.5... If the current exceeds 1.5 times the load current within a millisecond time, the roll changing trolley is judged to be stuck, an alarm is triggered, and a stop command for roll changing trolley 1 is issued. When roll changing trolley 1 travels to the non-mill end stopping point, roll changing trolley 1 stops, and the position of the non-mill end stopping point is set as Y. The position of roll changing trolley 1 at the non-mill end stopping point fed back by the first laser detection device 7 and the second laser detection device 8 is set as X. If |XY|≥5mm, then the position of roll changing trolley 1 at the non-mill end stopping point fed back by the first laser detection device 7 and the second laser detection device 8 is marked as Y. When the position of roll changing trolley 1 fed back by the first laser detection device 7 and the second laser detection device 8 is different during the movement of roll changing trolley 1, it means that roll changing trolley 1 has fallen off track 2 and needs to be stopped immediately. When cable turntable 3 does not rotate, but the first laser detection device 7 and the second laser detection device 8 report that roll changing trolley 1 is moving, there is an error in cable turntable 3 or cable, and it needs to be stopped immediately.
[0006] The first laser detection device 7 and the second laser detection device 8 detect that the roll changing trolley 1 stops means that the position of the laser emitted by the laser emitting device 6 illuminating the first laser detection device 7 and the second laser detection device 8 remains unchanged for a set time.
[0007] The first laser detection device 7 consists of multiple laser receiving devices arranged at equal intervals along one side of the roll changing channel, and the second laser detection device 8 consists of multiple laser receiving devices arranged at equal intervals along the other side of the roll changing channel. Each laser receiving device of the first laser detection device 7 corresponds one-to-one with each laser receiving device of the second laser detection device 8, and each pair of corresponding laser receiving devices is connected to a track 2 perpendicular to its nearest distance.
[0008] Both the first laser detection device 7 and the second laser detection device 8 are laser grating sensors.
[0009] The beneficial effects of this invention are: This invention uses advanced sensing, intelligent judgment and other technologies to realize self-diagnosis of the running status of the roller changing trolley and self-repair of position errors, thereby achieving preventive maintenance and keeping the equipment in a healthy state to avoid failure. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of the present invention;
[0011] Figure 2 This is the book Figure 1 A top view diagram;
[0012] Among them, 1. Roll changing trolley, 2. Track, 3. Cable turntable, 4. Cable fixing point, 5. Cable, 6. Laser emitting device, 7. First laser detection device, 8. Second laser detection device. Detailed Implementation
[0013] The main components of the roll changing trolley, the traveling mechanism (roll changing trolley 1), the turntable mechanism (cable turntable 3), and the accuracy of travel recognition are used to perform self-identification and self-judgment, so as to achieve stable operation of the equipment and preventive prompts, as well as the running time of the winding cable, and determine the replacement cycle.
[0014] like Figure 1 and 2 As shown, a self-diagnostic method for the running status of a roll changing trolley is described. A roll changing trolley 1 driven by a variable frequency motor is equipped with a cable turntable 3. An output torque detector is installed on the variable frequency motor. A cable 5 on the cable turntable 3 is connected to a cable fixing point 4. The roll changing trolley 1 runs on a track 2. A laser emitting device 6 is installed on the roll changing trolley 1. A first laser detection device 7 and a second laser detection device 8 are installed on both sides of the roll changing channel. The laser emitting device 6 simultaneously emits a laser beam to both sides of the roll changing channel. The two laser beams are on a straight line and this straight line is perpendicular to the track 2 where the roll changing trolley 1 is located.
[0015] The torque for pushing and pulling the rolls in and out of the roll changing trolley is calculated. The output torque of the inverter motor is detected in real time using a torque detector. During the operation of the roll changing trolley 1, when the torque detector detects that the output torque of the inverter motor is not less than the set output torque (the calculated torque for pushing and pulling the rolls in and out of the roll changing trolley), and the first laser detection device 7 and the second laser detection device 8 detect that the roll changing trolley 1 stops (for 3 seconds), if the feedback current of the inverter motor is greater than or equal to 1.5 times the load current within 0.5 ms, it is determined that the roll changing trolley is jammed, an alarm is triggered, and a stop command for the roll changing trolley 1 is issued.
[0016] In this invention, jamming refers to the situation where, during the process of the roll changing trolley pulling the roll out of the rolling mill or pushing the roll into the rolling mill, the roll changing trolley cannot move due to the incomplete operation of other equipment and interference from the roll.
[0017] When the roll changing trolley 1 travels to the non-mill end stopping point, it stops. The position of the non-mill end stopping point is set as Y. The position of the roll changing trolley 1 at the non-mill end stopping point, fed back by the first laser detection device 7 and the second laser detection device 8, is set as X. If |XY| ≥ 5mm, then the position of the roll changing trolley 1 at the non-mill end stopping point, fed back by the first laser detection device 7 and the second laser detection device 8, is marked as Y. This ensures the correct travel position of the roll changing trolley.
[0018] If the positions of the roll changing trolley 1 reported by the first laser detection device 7 and the second laser detection device 8 are different during the roll changing trolley's movement, it indicates that the roll changing trolley 1 has fallen off the track 2 and needs to be stopped immediately.
[0019] When the cable turntable 3 is not rotating, but the first laser detection device 7 and the second laser detection device 8 are feeding back information that the roll changing trolley 1 is moving, indicating that the cable turntable 3 or the cable is faulty, it is necessary to stop immediately.
[0020] This invention is used for self-diagnosis of the running status of the roll changing trolley during the roll changing operation, realizing functions such as roll changing trolley jamming judgment, roll changing trolley travel position self-identification, roll changing trolley derailment prevention, and cable turntable abnormality judgment.
[0021] In one embodiment, the first laser detection device 7 and the second laser detection device 8 detecting that the roll changing trolley 1 stops means that the position of the laser emitted by the laser emitting device 6 illuminating the first laser detection device 7 and the second laser detection device 8 remains unchanged for a set time.
[0022] In one embodiment, both the first laser detection device 7 and the second laser detection device 8 are laser grating sensors.
Claims
1. A self-diagnostic method for the operating status of a roll changing trolley, characterized in that: A cable turntable (3) is installed on a roll changing trolley (1) driven by a variable frequency motor. An output torque detector is installed on the variable frequency motor. The cable (5) on the cable turntable (3) is connected to the cable fixing point (4). The roll changing trolley (1) runs on the track (2). A laser emitting device (6) is installed on the roll changing trolley (1). A first laser detection device (7) and a second laser detection device (8) are installed on both sides of the roll changing channel. The laser emitting device (6) emits a laser beam to both sides of the roll changing channel at the same time. The two laser beams are on a straight line and this straight line is perpendicular to the track (2) where the roll changing trolley (1) is located. During the operation of the roll changing trolley (1), when the torque detector detects that the output torque of the variable frequency motor is not less than the set output torque, and the first laser detection device (7) and the second laser detection device (8) detect that the roll changing trolley (1) has stopped, if the feedback current of the variable frequency motor is 0.5 If the current is greater than or equal to 1.5 times the load current within a ms time, it is determined that the roll changing trolley is stuck, an alarm is triggered and a stop command for the roll changing trolley (1) is issued; when the roll changing trolley (1) travels to the non-mill end stopping point, the roll changing trolley (1) stops, the position of the non-mill end stopping point is set as Y, and the position of the roll changing trolley (1) at the non-mill end stopping point fed back by the first laser detection device (7) and the second laser detection device (8) is X. If |XY If |≥5mm, then the position of the roll changing trolley (1) at the non-mill end parking point fed back by the first laser detection device (7) and the second laser detection device (8) is marked as Y; when the roll changing trolley is traveling, if the position of the roll changing trolley (1) fed back by the first laser detection device (7) and the second laser detection device (8) is different, it means that the roll changing trolley (1) has fallen off the track (2) and needs to be stopped immediately; when the cable turntable (3) is not rotating, but the roll changing trolley (1) fed back by the first laser detection device (7) and the second laser detection device (8) is traveling, the cable turntable (3) is wrong or the cable is wrong and needs to be stopped immediately.
2. The self-diagnosis method for the operating status of a roll changing trolley according to claim 1, characterized in that: The first laser detection device (7) and the second laser detection device (8) detect that the roll changing trolley (1) stops means that the position of the laser emitted by the laser emitting device (6) illuminating the first laser detection device (7) and the second laser detection device (8) remains unchanged within a set time.
3. The self-diagnosis method for the operating status of a roll changing trolley according to claim 1, characterized in that: The first laser detection device (7) consists of multiple laser receiving devices arranged at equal intervals along one side of the roll changing channel, and the second laser detection device (8) consists of multiple laser receiving devices arranged at equal intervals along the other side of the roll changing channel. Each laser receiving device of the first laser detection device (7) corresponds one-to-one with each laser receiving device of the second laser detection device (8), and each pair of corresponding laser receiving devices is connected to a track (2) perpendicular to its closest distance.
4. The self-diagnosis method for the operating status of a roll changing trolley according to claim 1, characterized in that: Both the first laser detection device (7) and the second laser detection device (8) are laser grating sensors.