Roll changing control system of rolling mill

Abstract

The invention provides a roll changing control system of a rolling mill, which comprises a camera mounted on a roll changing trolley and used for acquiring an equipment state image in a roll changing process; the grating sensor is installed on the side face of the roller changing trolley, and the area formed by the grating sensor is larger than the roller changing operation area of the roller changing trolley. The relay is electrically connected with the grating sensor, and when an obstacle intrudes into the roller changing operation area, the relay generates a corresponding anomaly detection signal; the controller receives the abnormal detection signal and triggers a roller changing pause execution instruction according to the abnormal detection signal; therefore, in the roller changing process, an operator can observe the state of the equipment through the image returned by the camera so as to adjust the state in time; and in the roller changing process, if a person intrudes into the roller by mistake, the transmitting end and the receiving end of the grating sensor are in a disconnected state, at the moment, the relay sends out an abnormal detection signal, the controller triggers the roller changing pause function, and at the moment, the roller changing trolley pauses the roller changing work, so that the safety in the roller changing process is improved.

Description

Technical Field

[0001] The present application relates to the technical field of steel rolling safety applications, and in particular to a rolling mill roll changing control system. Background Art

[0002] In major steel production companies, especially hot rolling production lines, the working rolls of each rolling mill have a service life. When rolling to a certain tonnage, the roll diameter and roll surface will become smaller and deteriorate due to wear. According to the process requirements, the working rolls will be replaced and offline ground.

[0003] In the prior art, the entire process of replacing the working rolls needs to be completed by two people, one to operate and the other to confirm the equipment status. That is, during the actual roll changing process, the operator cannot observe the operation of the equipment in real time, so a dedicated person needs to be assigned to confirm the equipment operation status in front of the rolling mill, and the roll changing work is performed through mutual communication and confirmation between the two people.

[0004] However, this mode of operation requires that the personnel responsible for confirming the status of the equipment be very close to the rolling mill. If the equipment malfunctions, it will pose a safety hazard to the personnel. Summary of the invention

[0005] In view of the problems existing in the prior art, an embodiment of the present invention provides a rolling mill roll changing control system to solve or partially solve the technical problem in the prior art that when replacing the working rolls of the rolling mill, the existing replacement method may bring safety hazards to the operators.

[0006] The present invention provides a rolling mill roll changing control system, the system comprising:

[0007] The camera is installed on the roll-changing trolley to collect images of the equipment status and surrounding environment during the roll-changing process;

[0008] A grating sensor is installed on the side of the roll-changing trolley, and the area formed by the grating sensor is larger than the roll-changing operation area of ​​the roll-changing trolley;

[0009] A relay, electrically connected to the grating sensor, and when an obstacle enters the roller changing operation area, the relay is used to generate a corresponding abnormal detection signal;

[0010] The controller is used to receive the abnormal detection signal and trigger the roller changing suspension execution instruction according to the abnormal detection signal.

[0011] In the above scheme, the grating sensors include a first group of grating sensors and a second group of grating sensors; the first group of grating sensors includes a first grating transmitting end and a first grating receiving end; the second group of grating sensors includes a second grating transmitting end and a second grating receiving end; wherein,

[0012] When the roll changing trolley reaches the roll changing working position, the first grating emitting end is installed on one side of the roll changing trolley and is located at the end of the roll changing trolley away from the rolling mill; the first grating receiving end is installed on one side of the roll changing trolley and is located at the end of the roll changing trolley close to the rolling mill; the second grating emitting end is installed on the other side of the roll changing trolley and is located at the end of the roll changing trolley away from the rolling mill; the second grating receiving end is installed on the other side of the roll changing trolley and is located at the end of the roll changing trolley close to the rolling mill.

[0013] In the above scheme, the relay includes: a first relay and a second relay;

[0014] The first grating transmitting end is electrically connected to the first grating receiving end via a synchronization line, and the first grating receiving end is connected to the coil of the first relay;

[0015] The second grating transmitting end is electrically connected to the second grating receiving end via a synchronization line, and the second grating receiving end is connected to the coil of the second relay.

[0016] In the above solution, the system further comprises: a first indicator light, and a second indicator light;

[0017] The normally open contact of the first relay and the normally open contact of the second relay are connected to the first indicator light;

[0018] The normally closed contact of the first relay and the normally closed contact of the second relay are connected to the second indicator light; the second indicator light includes a red light and a buzzer.

[0019] In the above scheme, if the grating sensor detects an obstacle, the coil of the first relay and / or the coil of the second relay is in a disconnected state, and the normally closed contact of the first relay and / or the normally closed contact of the second relay is turned on, generating a corresponding abnormality detection signal;

[0020] Accordingly, the controller is used to:

[0021] The roll changing pause trigger instruction is triggered according to the abnormal detection signal, and the roll changing pause execution instruction is triggered according to the roll changing pause trigger instruction; the roll changing pause execution instruction is used to control the roll changing trolley and the rolling mill roll changing equipment to stop the roll changing action.

[0022] In the above solution, after generating the roller change pause trigger instruction according to the abnormal detection signal, the controller is further used to:

[0023] The roller change pause execution instruction is locked to maintain the roller change pause function and cut off the trigger circuit of the grating sensor to prevent the grating sensor from being unstable and causing the roller change pause trigger instruction to be triggered again and then trigger the roller change pause reset instruction, resulting in the roller change pause execution instruction being cut off and the roller change action continuing to be executed.

[0024] In the above solution, after the roller change suspension execution instruction is triggered according to the abnormal detection signal, the controller is further used to:

[0025] If it is determined that the reset signal sent by the operation box is received, the roller change pause reset instruction is triggered;

[0026] Based on the roll changing pause reset instruction, the roll changing trolley is controlled to resume normal roll changing action.

[0027] In the above scheme, if the grating sensor does not detect an obstacle, the coil of the first relay and the coil of the second relay are in a conducting state, and the normally open contact of the first relay and the normally open contact of the second relay are closed;

[0028] Accordingly, the controller is used to trigger a normal roll-changing instruction.

[0029] In the above scheme, the system also includes:

[0030] An operating box is provided with a first indicator light, a second indicator light and a grating enabling switch.

[0031] In the above scheme, the system further includes:

[0032] A picture monitor is installed on one side of the operation box, the picture monitor is electrically connected to the camera, and the picture monitor is used to present the device status and surrounding environment images.

[0033] The present invention provides a rolling mill roll changing control system, the system comprising: a camera, installed on a roll changing trolley, for collecting equipment status images during the roll changing process; a grating sensor, installed on the side of the roll changing trolley, the area formed by the grating sensor is larger than the roll changing operation area of ​​the roll changing trolley; a relay, electrically connected to the grating sensor, when an obstacle breaks into the roll changing operation area, the relay is used to generate a corresponding abnormal detection signal; a controller, for receiving the abnormal detection signal, triggering a roll changing pause execution instruction according to the abnormal detection signal; in this way, during the roll changing process, an operator can observe the equipment status through the image sent back by the camera, so as to make timely adjustments to ensure that the roll changing can proceed smoothly; and during the roll changing process, if a person breaks in by mistake, the transmitting end and the receiving end of the grating sensor will be in a disconnected state, at which time the relay will send an abnormal detection signal, the controller will trigger the roll changing pause function, at which time the roll changing trolley and the corresponding rolling mill roll changing equipment will suspend the roll changing work, thereby improving the safety during the roll changing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0035] Figure 1 It shows a schematic diagram of the overall structure of a rolling mill roll changing control system according to an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of a circuit principle of a grating sensor according to an embodiment of the present invention is shown;

[0037] Figure 3 A schematic diagram of a circuit principle between a controller and a grating sensor according to an embodiment of the present invention is shown;

[0038] Figure 4 A control logic schematic diagram of the controller is shown. DETAILED DESCRIPTION

[0039] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0040] In order to better understand the technical solution of the present invention, the following roller replacement process is introduced here:

[0041] When changing the rolls, the operator needs to click the start button on the operation box, and then the entire roll changing process will be automatically executed. When an abnormal situation occurs, the operator can perform manual operation through the on-site machine side cabinet.

[0042] During the actual roll changing process, when the roll changing trolley moves close to the rolling mill, it will block the operator's line of sight, making it impossible for the operator to observe the operation of the equipment in real time, or to confirm whether anyone has entered the roll changing operation area.

[0043] In common scenarios, a dedicated person is required to confirm the equipment operating status in front of the rolling mill, and the roll changing work is performed through mutual confirmation between the two people. However, this solution has the following disadvantages:

[0044] First, the personnel responsible for confirming the status of the equipment are too close to the rolling mill. Malfunction of the equipment or water or oil leakage in the high-pressure medium pipeline will cause potential safety hazards to personnel.

[0045] Second, during the automatic roll changing process, if the equipment does not move in place and the roll changing sequence cannot execute the next action, the personnel who need to confirm the equipment status will perform emergency processing on the on-site equipment. If an erroneous signal is generated during the processing and the roll changing conditions are met, the program will automatically execute the next equipment action, which will inevitably cause personal injury to the personnel who confirm the equipment status.

[0046] Therefore, in order to improve the safety and intelligence of roll changing process, the present invention provides a rolling mill roll changing control system, such as Figure 1 As shown, the system includes: a camera 1, a grating sensor, a roller changing trolley 2, a controller (PLC controller, generally located in a control room, not shown in the figure), an operation box 3 and a picture monitor 4;

[0047] Camera 1, installed on the roll changing trolley 2, is used to collect equipment status images during the roll changing process;

[0048] The grating sensor is installed on the side of the roll-changing trolley, and the area formed by the grating sensor is larger than the roll-changing operation area of ​​the roll-changing trolley 2;

[0049] A relay is electrically connected to the grating sensor, and when an obstacle enters the roll changing operation area, the relay is used to generate a corresponding abnormal detection signal;

[0050] The controller is used to receive an abnormal detection signal and trigger a roller changing pause execution instruction according to the abnormal detection signal.

[0051] Specifically, the camera 1 is installed at one end of the roll changing trolley 2, which is the end close to the rolling mill 5; the camera range of the camera 1 needs to cover the entire roll changing operation area, and is mainly used to collect equipment status images during the roll changing process.

[0052] It is understandable that if Figure 1 As shown, the rolling mill 5 is provided with an upper working roll 51 and a lower working roll 52. When a working roll needs to be replaced, the roll changing trolley 2 travels to a preset position, the working roll to be replaced moves to a preset height (rises or falls), the hook of the roll changing trolley 2 is connected with the working roll to be replaced, the roll changing trolley 2 pulls the working roll to be replaced out of the rolling mill 5, and then pushes the new working roll into the rolling mill 5. Therefore, the equipment status image may include: a roll action image, a roll locking baffle status image, and a roll changing trolley hook status image (whether the hook is connected to the roll), etc.

[0053] Of course, in order to prevent personnel from accidentally entering the roll changing operation area during the roll changing process, the camera 1 can also collect images of personnel in the roll changing operation area and send them to the picture monitor 4 for the operator to view.

[0054] Continue to refer Figure 1 The grating sensor includes a first group of grating sensors and a second group of grating sensors; the first group of grating sensors includes a first grating transmitting end 11 and a first grating receiving end 12; the second group of grating sensors includes a second grating transmitting end 13 and a second grating receiving end 14; wherein,

[0055] When the roll changing trolley 2 reaches the roll changing working position, the first grating emitting end 11 is installed on one side of the roll changing trolley 2 and is located at the end of the roll changing trolley 2 away from the rolling mill; the first grating receiving end 12 is installed on one side of the roll changing trolley 2 and is located at the end of the roll changing trolley 2 close to the rolling mill; the second grating emitting end 13 is installed on the other side of the roll changing trolley 2 and is located at the end of the roll changing trolley 2 away from the rolling mill 5; the second grating receiving end 14 is installed on the other side of the roll changing trolley 2 and is located at the end of the roll changing trolley 2 close to the rolling mill 5.

[0056] In this way, the first group of grating sensors, the second group of grating sensors and the roll-changing trolley 2 form a rectangular roll-changing operation area. The installation height of the grating sensors can be determined according to the actual situation on site, such as 1.2m, which is not limited here.

[0057] like Figure 2 As shown, the relay includes: a first relay KA1, a second relay KA2, a first indicator light L1, and a second indicator light;

[0058] The first grating transmitting end 11 is electrically connected to the first grating receiving end 12 via a synchronization line, and the first grating receiving end 12 is connected to the coil of the first relay KA1;

[0059] The second grating transmitting end 13 is electrically connected to the second grating receiving end 14 via a synchronization line, and the second grating receiving end 14 is connected to the coil of the second relay KA2.

[0060] The normally open contact of the first relay KA1 and the normally open contact of the second relay KA2 are connected to the first indicator light L1; the first indicator light is green;

[0061] The normally closed contact of the first relay KA1 and the normally closed contact of the second relay KA2 are connected to the second indicator light; the second indicator light includes a red light L2 and a buzzer L3.

[0062] refer to Figure 3 The output signals of the first relay KA1 and the second relay KA2 are used as input signals of the PLC controller, and the PLC controller can control the roller changing according to the output signals of the first relay KA1 and the second relay KA2.

[0063] Here, the specific implementation logic of the roll change control is as follows:

[0064] If there is an obstacle between the first grating transmitting end 11 and the first grating receiving end 12, the first grating transmitting end 11 and the first grating receiving end 12 are in a disconnected state; and / or if there is an obstacle between the second grating transmitting end 13 and the second grating receiving end 14, the second grating transmitting end 13 and the second grating receiving end 14 are in a disconnected state.

[0065] Then the coil of the first relay KA1 and / or the coil of the second relay KA2 is disconnected and de-energized. At this time, the normally open contacts KA1 and / or KA2 in the green light circuit are disconnected, and the green light goes out; the normally closed contacts KA1 and / or KA2 in the red light circuit are connected, and the red light turns on and the buzzer sounds.

[0066] That is, in one embodiment, if the grating sensor detects an obstacle, the coil of the first relay and / or the coil of the second relay is in a disconnected state, the normally closed contact of the first relay and / or the normally closed contact of the second relay is turned on, and a corresponding abnormality detection signal is generated;

[0067] Accordingly, the controller is used to:

[0068] The roll changing pause trigger instruction is triggered according to the abnormal detection signal, and the roll changing pause execution instruction is triggered according to the roll changing pause trigger instruction; the roll changing pause execution instruction is used to control the roll changing trolley and the corresponding rolling mill roll changing equipment to stop the roll changing action.

[0069] In one embodiment, after generating a roller change pause trigger instruction according to the abnormal detection signal, the controller is further used to:

[0070] The roller change pause execution instruction is locked to maintain the roller change pause function and cut off the trigger circuit of the grating sensor to prevent the roller change pause trigger instruction from being triggered again due to the instability of the grating sensor, thereby triggering the roller change pause reset instruction, causing the roller change pause execution instruction to be cut off, thereby causing the roller change action to continue.

[0071] In one embodiment, after triggering the roller change suspension execution instruction according to the abnormal detection signal, the controller is further used to:

[0072] If it is determined that the reset signal sent by the operation box is received, the roller change pause reset instruction is triggered;

[0073] Based on the roll changing pause reset instruction, the roll changing trolley and the corresponding roll changing equipment of the rolling mill are controlled to resume normal roll changing action.

[0074] Specifically, an operation box 3 and a screen monitor 6 are provided at the production site, and a first indicator light L1, a second indicator light and a grating enable switch L4 are installed on the operation box 3. A human-machine interaction interface is provided on the operation box 3, and a start button, a pause button and a stop button are provided in the human-machine interaction interface.

[0075] The picture monitor 6 is installed on one side of the operation box 3 . The picture monitor 6 is electrically connected to the camera 1 . The picture monitor 6 is used to present the equipment status and the surrounding environment images during the roller changing process.

[0076] Before changing the roller, in order to ensure the reliability of the grating sensor, it is necessary to test whether the grating sensor is normal in advance. Then the grating enable switch L4 needs to be closed. When the grating enable switch is closed, the grating sensor starts to work. If the transmitting end and the receiving end operate normally, the receiving end will output a 24V+ signal, the coils of the first relay KA1 and the second relay KA2 will be energized, and the enable signal light of the operation box 2 will light up, reminding the operator that the grating sensor function is normal. At the same time, the grating sensor will also return a 24V+ signal to the PLC controller. After receiving this signal, the PLC controller determines that the grating sensor is normal.

[0077] Then, the operator can click the start button, and the controller receives the start roll change signal, and the roll change operation is performed. If no obstacles accidentally enter the roll change operation area during the roll change process, the roll change can be carried out normally.

[0078] In this case, there is no obstacle between the first grating transmitting end 11 and the first grating receiving end 12. At this time, the first grating transmitting end 11 and the first grating receiving end 12 are in a connected state, and the coil of the first relay KA1 and the coil of the second relay KA2 are in a conducting state. At this time, the two normally open contacts KA1 and KA2 in the first indicator light circuit (green light circuit) are closed, and the green light is on. The normally closed contacts KA1 and KA2 of the corresponding coils in the second indicator light circuit (red light circuit) are disconnected, the red light L2 is not on, and the buzzer L3 does not sound.

[0079] That is, in one embodiment, if the grating sensor does not detect an obstacle, the coil of the first relay KA1 and the coil of the second relay KA2 are in a conducting state, the second grating transmitting end 13 and the second grating receiving end 14 are also in a conducting state, the normally open contact of the first relay KA1 and the normally open contact of the second relay KA2 in the green light circuit are closed, and the first indicator light is on. At this time, the input end of the controller does not receive an abnormal detection signal, and accordingly, the controller is used to trigger a normal roll changing instruction, and the roll changing trolley 2 and the rolling mill 5 perform normal roll changing operations.

[0080] During the roll changing process, the operator needs to observe the equipment status from the screen monitor 6. If the equipment status is abnormal (for example, the hook of the roll changing trolley is not connected to the working roll to be replaced), click the pause button, and the controller receives the pause signal sent by the operation box 3. At this time, the roll changing action is paused, and the staff intervenes to check the abnormal situation.

[0081] In addition, during the roll changing process, if an obstacle (personnel or water vapor or wooden sticks on site) accidentally enters the roll changing operation area, the control logic of the controller is as follows:

[0082] refer to Figure 4 The control logic of the controller includes three control program modules, namely, program block 1, program block 2 and program block 3: program block 1 is mainly used to output the roll change pause trigger instruction, program block 2 is mainly used to output the roll change pause reset instruction, and program segment 3 is mainly used to output the roll change pause execution instruction and realize the roll change pause locking. Among them, the roll change pause trigger instruction can be understood as a pulse signal used to indicate that the roll change needs to be paused at this time, and the roll change pause execution instruction can be understood as a signal used to control the roll change trolley and the corresponding rolling mill roll change equipment to stop the roll change action.

[0083] Continue to refer Figure 4 The roller change pause trigger instruction in program block 1 is divided into two situations. One situation is that the operator clicks the pause button on the operation box 3, and the operation box 3 sends a roller change pause signal a. At this time, the controller will receive the roller change pause signal a sent by the operation box 3, and trigger the roller change pause trigger instruction b based on the roller change pause signal a.

[0084] In another case, if an obstacle passes through the first set of grating sensors during the roller change process, the first set of grating sensors will correspond to a grating detection signal c; if an obstacle passes through the second set of grating sensors, the second set of grating sensors will correspond to a grating detection signal d. The corresponding relay outputs an abnormal detection signal to the controller. Figure 4 In program block 1, if the grating detection signal c and / or grating detection signal d are generated for the first time, since the roller change pause execution instruction e in program block 1 has not been triggered at this time, and the roller change pause execution instruction e in program block 1 is a reverse operation / , the program code corresponding to the roller change pause execution instruction e is in the on state at this time (this program path is on, but the roller change pause execution instruction e is not executed), so the controller will output the roller change pause trigger instruction b based on the abnormal detection signal.

[0085] Then, program block 2 is executed. The starting instruction of program block 2 is the roller change pause trigger instruction b. However, since the roller change pause execution instruction e is not triggered at this time, the roller change pause reset instruction f cannot be triggered. Program block 2 cannot be executed, and program block 3 will continue to be executed.

[0086] The starting instruction of program block 3 is also the roll change pause trigger instruction b. At this time, the roll change pause reset instruction f is not triggered. Since the roll change pause reset instruction f in program block 3 is a reverse operation / , the program code corresponding to the roll change pause reset instruction f is in the on state at this time, and will reach the roll change pause execution instruction e. At this time, the roll changing equipment will no longer perform the roll changing action.

[0087] In addition, in order to prevent the grating sensor signal from being unstable and causing the roller change pause trigger instruction b to be triggered again (triggering again is equivalent to resetting), causing the equipment to resume the roller change action, affecting the safety of the staff and equipment, continue to refer to Figure 4 The present invention adds a roller-changing pause execution instruction g in program block 3 (roller-changing pause execution instruction g is exactly the same as roller-changing pause execution instruction e) to realize self-locking of the roller-changing pause execution instruction, so that the roller-changing pause execution instruction g is always in the on state. The roller-changing pause execution instruction e in program block 1 is a reverse operation, so when the roller-changing pause execution instruction g in program block 3 is in the on state, the roller-changing pause execution instruction e in program block 1 is in the off state. At this time, even if there is a grating detection signal c and / or a grating detection signal d, the roller-changing pause execution instruction e in program block 1 will cut off the grating trigger circuit and will not trigger the roller-changing pause trigger instruction b again. Therefore, the roller-changing pause reset instruction f in program segment 2 will not be triggered, and the roller-changing pause execution instruction will not be cut off, and the roller-changing action will continue to be suspended. In this way, it is avoided that the grating error signal causes the equipment to resume the roller-changing action, ensuring the safety of personnel.

[0088] Specifically, a roll-changing pause execution instruction g is added to program block 3, so that program block 3 contains two signals: the first signal is the signal of the roll-changing pause trigger instruction b, and the second signal is the signal of the roll-changing pause execution instruction g. Since the roll-changing pause trigger instruction b is an instantaneous signal, after the roll-changing pause trigger instruction b is triggered, the first signal is disconnected and the second signal will be executed. The second signal roll-changing pause execution instruction g will always have output, thereby realizing the self-locking of the roll-changing pause execution instruction.

[0089] It is worth noting that Figure 4 The "p" in the code refers to the rising edge being valid.

[0090] Furthermore, when the operator confirms that there are no obstacles (such as no personnel) in the roll changing operation area, the operator can continue to click the pause button on the screen of the operation box 3. At this time, the roll changing pause trigger instruction b is triggered again, and the program block 2 continues to be executed. The controller is equivalent to receiving the reset signal sent by the operation box 3, and then triggers the roll changing pause reset instruction f, and controls the roll changing trolley 2 and the corresponding rolling mill roll changing equipment based on the roll changing pause reset instruction f to resume normal roll changing action.

[0091] Based on this, it can be seen that in the present invention, only after the operator confirms the safety of the on-site equipment and personnel, and clicks the pause button on the screen of the operation box 3, can the roller changing sequence be restored to automatic and the equipment can operate normally, further ensuring the safety of personnel and equipment.

[0092] During the roll changing process of the present invention, the operator can observe the equipment status through the image transmitted back by the camera, so as to make timely adjustments to ensure that the roll changing can proceed smoothly; and during the roll changing process, if a person or other obstacles accidentally break into the equipment, the transmitting end and the receiving end of the grating sensor will be in a disconnected state, at which time the relay will send out an abnormal detection signal, and the controller will trigger the roll changing pause function, at which time the roll changing trolley and the corresponding rolling mill roll changing equipment will suspend the roll changing work, thereby improving the safety of the roll changing process.

[0093] Through one or more embodiments of the present invention, the present invention has the following beneficial effects or advantages:

[0094] The present invention provides a rolling mill roll changing control system, the system comprising: a camera, installed on a roll changing trolley, for collecting images of equipment status and surrounding environment during the roll changing process; a grating sensor, installed on the side of the roll changing trolley, the area formed by the grating sensor is larger than the roll changing operation area of ​​the roll changing trolley; a relay, electrically connected to the grating sensor, when an obstacle breaks into the roll changing operation area, the relay is used to generate a corresponding abnormal detection signal; a controller, for receiving the abnormal detection signal, triggering a roll changing pause execution instruction according to the abnormal detection signal; in this way, during the roll changing process, an operator can observe the equipment status through the image sent back by the camera, so as to make timely adjustments to ensure that the roll changing can proceed smoothly; and during the roll changing process, if a person breaks in by mistake, the transmitting end and the receiving end of the grating sensor will be in a disconnected state, at which time the relay will send an abnormal detection signal, the controller will trigger the roll changing pause function, at which time the roll changing trolley will pause the roll changing work, thereby improving the safety during the roll changing process.

[0095] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rolling mill roll changing control system, characterized in that: The system comprises: The camera is installed on the roll-changing trolley to collect images of the equipment status and surrounding environment during the roll-changing process; A grating sensor is installed on the side of the roll-changing trolley, and the area formed by the grating sensor is larger than the roll-changing operation area of ​​the roll-changing trolley; A relay, electrically connected to the grating sensor, and when an obstacle enters the roller changing operation area, the relay is used to generate a corresponding abnormal detection signal; The controller is used to receive the abnormal detection signal and trigger the roller changing suspension execution instruction according to the abnormal detection signal.

2. The system according to claim 1, characterized in that The grating sensors include a first group of grating sensors and a second group of grating sensors; the first group of grating sensors includes a first grating transmitting end and a first grating receiving end; the second group of grating sensors includes a second grating transmitting end and a second grating receiving end; wherein, When the roll changing trolley reaches the roll changing working position, the first grating emitting end is installed on one side of the roll changing trolley and is located at the end of the roll changing trolley away from the rolling mill; the first grating receiving end is installed on one side of the roll changing trolley and is located at the end of the roll changing trolley close to the rolling mill; the second grating emitting end is installed on the other side of the roll changing trolley and is located at the end of the roll changing trolley away from the rolling mill; the second grating receiving end is installed on the other side of the roll changing trolley and is located at the end of the roll changing trolley close to the rolling mill.

3. The system according to claim 2, characterized in that The relay comprises: a first relay and a second relay; The first grating transmitting end is electrically connected to the first grating receiving end via a synchronization line, and the first grating receiving end is connected to the coil of the first relay; The second grating transmitting end is electrically connected to the second grating receiving end via a synchronization line, and the second grating receiving end is connected to the coil of the second relay.

4. The system according to claim 1, wherein: The system further comprises: a first indicator light, and a second indicator light; The normally open contact of the first relay and the normally open contact of the second relay are connected to the first indicator light; The normally closed contact of the first relay and the normally closed contact of the second relay are connected to the second indicator light; the second indicator light includes a red light and a buzzer.

5. The system according to claim 4, characterized in that If the grating sensor detects an obstacle, the coil of the first relay and / or the coil of the second relay is disconnected, the normally closed contact of the first relay and / or the normally closed contact of the second relay is turned on, and a corresponding abnormality detection signal is generated; Accordingly, the controller is used to: The roll changing pause trigger instruction is triggered according to the abnormal detection signal, and the roll changing pause execution instruction is triggered according to the roll changing pause trigger instruction; the roll changing pause execution instruction is used to control the roll changing trolley and the rolling mill roll changing equipment to stop the roll changing action.

6. The system according to claim 5, characterized in that After generating the roller change pause trigger instruction according to the abnormal detection signal, the controller is further used to: The roller change pause execution instruction is locked to maintain the roller change pause function and cut off the trigger circuit of the grating sensor to prevent the roller change pause trigger instruction from being triggered again due to the instability of the grating sensor, thereby triggering the roller change pause reset instruction, causing the roller change pause execution instruction to be cut off, thereby causing the roller change action to continue.

7. The system according to claim 1, characterized in that After the roller changing pause execution instruction is triggered according to the abnormal detection signal, the controller is further used to: If it is determined that the reset signal sent by the operation box is received, the roller change pause reset instruction is triggered; Based on the roll changing pause reset instruction, the roll changing trolley and the rolling mill roll changing equipment are controlled to resume normal roll changing action.

8. The system according to claim 4, characterized in that If the grating sensor does not detect an obstacle, the coil of the first relay and the coil of the second relay are in a conducting state, and the normally open contact of the first relay and the normally open contact of the second relay are closed; Accordingly, the controller is used to trigger a normal roll-changing instruction.

9. The system according to claim 4, characterized in that The system further comprises: An operating box is provided with a first indicator light, a second indicator light and a grating enabling switch.

10. The system according to claim 1, wherein: The system further comprises: A picture monitor is installed on one side of the operation box, the picture monitor is electrically connected to the camera, and the picture monitor is used to present the device status and surrounding environment images.

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