On-line preheating device for roller of profile rolling mill

Abstract

The invention relates to the technical field of rolling of profile rolling mills, in particular to an online preheating device for a roller of a profile rolling mill. The technical problems that when an existing profile rolling mill roller heats a profile, due to the fact that the roller is abraded after being used for a long time and the diameter of the abraded roller is reduced, a preheating device with a fixed distance may deviate from the optimal heating distance, and the heating efficiency of the profile is affected are solved. According to the technical scheme, the on-line preheating device for the roller of the profile rolling mill comprises a rack, a fixed roller, an upper preheating fixing frame, a lower preheating fixing frame, a controller, a preheating assembly, a detection assembly and an adjusting assembly, the fixed roller is arranged on the inner side of the rack, the upper preheating fixing frame is arranged on the inner side of the rack, and the lower preheating fixing frame is arranged on the inner side of the rack; the distance between the surface of the roller and the preheating assembly is monitored in real time, the position of the preheating frame is automatically adjusted according to the abrasion condition, and therefore the optimal heating distance is kept, and the heating efficiency and the rolling quality are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of profile mill rolling, in particular to an online preheating device for profile mill rolls. Background Art

[0002] During the rolling process, the profile mill rolls need to be heated by a preheating device to increase the roll temperature, reduce the deformation resistance of the profile and improve the rolling quality. In the existing technology, the profile mill roll preheating device usually adopts a fixed structure, that is, upper and lower preheating fixed frames are set on the frame, with built-in heating elements (such as resistance heating plates), and the roll surface is radiated heated by preheating components with fixed spacing. During the initial installation of such devices, the distance between the preheating components and the roll surface is set to the optimal heating distance to ensure heat transfer efficiency.

[0003] However, existing fixed preheating devices have significant defects: during long-term use, the surface of the roller will gradually wear due to friction and extrusion with the profile, resulting in a reduction in the roller diameter; at this time, the actual distance between the preheating component and the roller surface will exceed the initially set optimal heating distance, and as the wear increases, the distance deviation will further increase; since the existing device lacks real-time monitoring and dynamic adjustment mechanisms, the distance between the preheating component and the roller surface cannot adapt to changes in wear, resulting in a significant decrease in heating efficiency, which is specifically manifested as: increased heating power demand (to compensate for heat loss caused by increased distance), uneven roller surface temperature (local overheating or underheating), serious energy waste, and even the profile rolling quality may be affected due to insufficient heating.

[0004] In response to the above problems, no effective solution has been proposed in the existing technology; some improvement plans attempt to manually measure the roll diameter and manually adjust the preheating frame position at regular intervals, but this method is cumbersome to operate and has poor timeliness, and cannot meet the needs of continuous production of the rolling mill; another plan proposes to increase the preheating power to offset the distance deviation, but this will lead to a surge in energy consumption and cannot solve the problem of uneven surface temperature; therefore, there is an urgent need for an online preheating device that can monitor the surface state of the roll in real time and dynamically adjust the position of the preheating component to solve the problem of decreased heating efficiency caused by roll wear.

[0005] The present invention is an online preheating device for profile mill rolls, which is proposed to address the above-mentioned technical problems. It monitors the distance from the roll surface to the preheating assembly in real time and automatically adjusts the position of the preheating frame according to the wear condition, thereby maintaining the optimal heating distance and significantly improving the heating efficiency and rolling quality. Summary of the Invention

[0006] In order to overcome the problem that when the existing profile rolling mill rollers heat the profiles, the rollers wear out after long-term use, and the diameter of the rollers decreases after wear, which causes the preheating devices with fixed spacing to deviate from the optimal heating distance, affecting the heating efficiency of the profiles.

[0007] The technical solution of the present invention is: an online preheating device for a section rolling mill roll, comprising a frame, fixed rolls, an upper preheating fixed frame, a lower preheating fixed frame, a controller, a preheating component, a detection component and an adjustment component, wherein the fixed rolls are arranged on the inner side of the frame, the upper preheating fixed frame is arranged on the inner side of the frame, the lower preheating fixed frame is arranged on the inner side of the frame, a controller is arranged on one side of the frame, a preheating component is arranged on the inner side of the upper preheating fixed frame, two groups of preheating components are arranged, the other group of preheating components is located on the inner side of the lower preheating fixed frame, a detection component is arranged above the upper preheating fixed frame, another group of detection components is arranged below the lower preheating fixed frame, and an adjustment component is arranged on the inner side of the frame; The preheating assembly includes a heating plate, thermal insulation fiber and a ceramic plate. The heating plate is arranged on the inner side of the upper preheating fixed frame, the thermal insulation fiber is arranged on one side of the heating plate, and the ceramic plate is arranged on one side of the thermal insulation fiber. The heating plate is electrically connected to the external power supply device. The detection component includes a mounting plate and a laser displacement sensor array. A mounting plate is arranged above the upper preheating component, and a laser displacement sensor array is arranged on one side of the mounting plate. The laser displacement sensor array integrates multiple groups of horizontally arrayed laser displacement sensors, and the laser displacement sensor array and the controller are electrically connected.

[0008] Preferably, the controller energizes the heating plate to release heat to preheat the surface of the fixed roller in the frame, thereby increasing the temperature of the surface of the fixed roller, and the thermal insulation protection effect is achieved through the multi-layer thermal insulation fiber. The ceramic plate plays an insulating role to prevent the frame from being conductive after the heating plate is energized. The laser displacement sensor array is started to continuously scan and detect the distance between the surface of the fixed roller and the laser displacement sensor array. The detection result is transmitted to the controller through the built-in wireless transmission unit of the laser displacement sensor array. The degree of wear on the surface of the fixed roller is obtained by analyzing the detection results. The data detected by the laser displacement sensor array is sorted and the threshold range of the optimal distance when the heating plate heats the fixed roller is calculated. When the distance exceeds the threshold range of the optimal distance, the controller sends a control instruction to the adjustment mechanism to adjust the position of the upper preheating fixed frame and the lower preheating fixed frame, thereby determining a constant radiation distance between the heating point and the roller, thereby improving the heating efficiency.

[0009] Preferably, the preheating component also includes a seamless square tube and a water storage cavity. A seamless square tube is provided on one side of the ceramic sheet. There are multiple groups of seamless square tubes. Two groups of water storage cavities are provided at both ends of the seamless square tubes. The seamless square tubes connect the two groups of water storage cavities.

[0010] Preferably, the preheating assembly also includes a circulating water pipe and a temperature gun. A circulating water pipe is provided on one side of the water storage chamber. There are two groups of circulating water pipes. The two groups of circulating water pipes are connected to an external coolant delivery pump. A temperature gun is provided above the upper preheating fixed frame, and another group of temperature guns is provided below the lower preheating fixed frame.

[0011] Preferably, the adjustment assembly includes a first motor and a first lead screw. The first motor is provided on one side of the frame, and the first lead screw is provided at the output end of the first motor.

[0012] Preferably, the adjustment assembly further includes a movable rack, and the outer side of the first lead screw is threadedly connected to the movable rack.

[0013] Preferably, the adjustment assembly further includes a second motor and a second lead screw. The second motor is arranged above the movable frame, and the second lead screw is arranged at the output end of the second motor.

[0014] Preferably, the adjustment assembly further includes a lifting frame, the outer side of the second screw is threadedly connected to the lifting frame, and the lifting frame and the upper preheating fixing frame are connected to each other.

[0015] Preferably, the laser displacement sensor array includes the following steps during data acquisition: S101: The controller sends a start command to the laser displacement sensor array. All laser displacement sensors enter the working state synchronously, emitting laser beams at a fixed frequency toward the roller surface and receiving reflected signals. Each sensor independently measures the real-time distance data of its corresponding scanning point, forming a raw data stream containing lateral position coordinates and longitudinal distance values. S102: The roller is in a rotating state, and the sensor array synchronously obtains the angular displacement information of the roller through the encoder built into the rolling mill equipment. The measurement data of different sensors are spatially aligned according to the timestamp and the roller rotation angle, so that each measurement point corresponds to the actual position of the roller surface; S103: Dynamic threshold filtering is performed on the original data stream to remove abnormal jump points caused by the oxide layer, oil pollution and vibration on the roller surface; the specific method is as follows: The mean and standard deviation of the distances within multiple rotation cycles at the same lateral position were calculated, and measurements that deviated from the mean by more than three times the standard deviation were marked as abnormal and discarded. The remaining valid data were processed in the next stage.

[0016] Preferably, the controller includes the following steps when analyzing the data: S201: The controller retrieves the reference distance data of the roller surface during initial installation, i.e., the Z-axis value in the unworn state, compares it with the current measurement data, and calculates the wear depth ΔZ of the X-axis at each X-axis position; generates a wear profile curve of the roller surface through polynomial fitting or piecewise linear interpolation, and calculates the maximum wear amount and average wear amount; S202: Based on the heat conduction characteristics of the roller material and the preheating efficiency model, the initial optimal heating distance D0 is preset; combined with the current wear amount, the optimal heating distance is dynamically corrected to: D = D0+α·ΔZ; Where α is the wear compensation coefficient; the allowable error range ΔD is defined to form the dynamic threshold range of the heating distance [D-ΔD, D+ΔD]; S203: The distance Z from the roller surface to the preheating component measured in real time by the laser displacement sensor array 实时 Compare with dynamic threshold range; If there is Z 实时 If it exceeds [D-ΔD, D+ΔD], it is determined that the preheating component needs to be adjusted, and the lateral range and deviation of the out-of-tolerance area ΔD=Z are recorded. 实时 -D.

[0017] Preferably, the controller specifically includes the following steps when generating the control instruction: S301: Determine the preheating component that needs to be adjusted based on the lateral range of the out-of-tolerance area; If the out-of-tolerance area is located on the upper part of the roll, adjust the upper preheating fixed frame; if it is located on the lower part, adjust the lower preheating fixed frame; the adjustment amount ΔY is calculated based on the deviation amount ΔD, using the proportional control algorithm: ΔY=Kp·ΔD; Where Kp is the proportional coefficient; S302: The controller decomposes the adjustment amount ΔY into horizontal and vertical displacement instructions. For horizontal adjustment, the first motor drives the first lead screw to move the movable frame along the X axis by ΔX. For vertical adjustment, the second motor drives the second lead screw to move the lifting frame along the Z axis by ΔZ. S303: During the adjustment process, the laser displacement sensor array continuously monitors the distance from the roller surface to the preheating component. 实时 When both enter the dynamic threshold range [D-ΔD, D+ΔD], the controller sends a stop command, terminates the adjustment and locks the preheating component position; if the adjustment times exceed the preset maximum value and the conditions are still not met, an alarm is triggered and manual intervention is prompted.

[0018] Beneficial effects of the present invention: The controller energizes the heating plate to release heat to preheat the surface of the fixed roller in the frame, thereby increasing the temperature of the fixed roller surface. The thermal insulation protection function is achieved through multiple layers of thermal insulation fibers, and the ceramic plate acts as an insulator to prevent the frame from conducting electricity after the heating plate is energized. The laser displacement sensor array is started to continuously scan and detect the distance between the fixed roller surface and the laser displacement sensor array. The detection results are transmitted to the controller through the built-in wireless transmission unit of the laser displacement sensor array. The degree of wear on the surface of the fixed roller is obtained by analyzing the detection results. The data detected by the laser displacement sensor array is sorted out to calculate the threshold range of the optimal distance when the heating plate heats the fixed roller. When the distance exceeds the threshold range of the optimal distance, the control instruction is sent to the adjustment mechanism through the controller to adjust the position of the upper preheating fixed frame and the lower preheating fixed frame, thereby determining a constant radiation distance between the heating point and the roller, thereby improving the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the online preheating device for the rolls of a section rolling mill of the present invention; Figure 2 Shown is a schematic diagram of the first cross-sectional structure of the online preheating device for the rolls of a section rolling mill of the present invention; Figure 3 Shown is a schematic diagram of the second cross-sectional structure of the online preheating device for the rolls of a section rolling mill of the present invention; Figure 4 Shown is a schematic diagram of a first partial cross-sectional structure of the online preheating device for the section mill rolls of the present invention; Figure 5 Shown is a schematic diagram of a second partial cross-sectional structure of the online preheating device for the section mill rolls of the present invention; Figure 6 Shown is a schematic diagram of the first partial structure of the online preheating device for the rolls of a section rolling mill of the present invention; Figure 7 Shown is a schematic diagram of the second partial structure of the online preheating device for the rolls of a section rolling mill of the present invention; Figure 8 Shown is a schematic diagram of the third partial structure of the online preheating device for the rolls of a section rolling mill of the present invention; Explanation of the accompanying symbols: 1. Frame; 2. Fixed roller; 3. Upper preheating fixed frame; 4. Lower preheating fixed frame; 5. Controller; 101. Heating plate; 102. Insulation fiber; 103. Ceramic plate; 104. Seamless square tube; 105. Water storage chamber; 106. Circulating water pipe; 107. Temperature gun; 201. Mounting plate; 202. Laser displacement sensor array; 301. First motor; 302. First screw; 303. Moving frame; 304. Second motor; 305. Second screw; 306. Lifting frame. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and examples.

[0021] See also Figure 1 and Figure 2 The present invention provides an embodiment: an online preheating device for a profile rolling mill roll, comprising a frame 1, a fixed roll 2, an upper preheating fixed frame 3, a lower preheating fixed frame 4, a controller 5, a preheating component, a detection component and an adjustment component. The fixed roll 2 is arranged on the inner side of the frame 1, the upper preheating fixed frame 3 is arranged on the inner side of the frame 1, the lower preheating fixed frame 4 is arranged on the inner side of the frame 1, a controller 5 is arranged on one side of the frame 1, a preheating component is arranged on the inner side of the upper preheating fixed frame 3, two groups of preheating components are arranged, the other group of preheating components is located on the inner side of the lower preheating fixed frame 4, and a detection component is arranged above the upper preheating fixed frame 3. Components, another set of detection components is provided below the lower preheating fixed frame 4, and an adjustment component is provided on the inner side of the frame 1; the preheating component includes a heating plate 101, a thermal insulation fiber 102 and a ceramic plate 103, and the inner side of the upper preheating fixed frame 3 is provided with a heating plate 101, a thermal insulation fiber 102 is provided on one side of the heating plate 101, and a ceramic plate 103 is provided on one side of the thermal insulation fiber 102, and the heating plate 101 is electrically connected to the external power supply device; the detection component includes a mounting plate 201 and a laser displacement sensor array 202, and a mounting plate 201 is provided above the upper preheating component, and a laser displacement sensor array 202 is provided on one side of the mounting plate 201. The optical displacement sensor array 202 integrates multiple groups of horizontally arrayed laser displacement sensors, and the laser displacement sensor array 202 is electrically connected to the controller 5. The controller 5 energizes the heating plate 101 to release heat to preheat the surface of the fixed roller 2 in the frame 1, thereby increasing the surface temperature of the fixed roller 2. The multi-layer insulation fiber 102 achieves thermal insulation protection, and the ceramic plate 103 plays an insulating role to prevent the frame 1 from conducting electricity after the heating plate 101 is energized. By starting the laser displacement sensor array 202, the surface of the fixed roller 2 to the laser displacement sensor array 202 is preheated. The distance between the fixed roller 2 and the upper preheating frame 3 is continuously scanned and detected, and the detection result is transmitted to the controller 5 through the built-in wireless transmission unit of the laser displacement sensor array 202. The surface wear degree of the fixed roller 2 is obtained by analyzing the detection result. The data detected by the laser displacement sensor array 202 is sorted out, and the threshold range of the optimal distance when the heating plate 101 heats the fixed roller 2 is calculated. When the distance exceeds the threshold range of the optimal distance, the controller 5 sends a control instruction to the adjustment mechanism to adjust the position of the upper preheating fixed frame 3 and the lower preheating fixed frame 4, thereby determining the constant radiation distance between the heating point and the roller.

[0022] See also Figure 3 and Figure 4In this embodiment, the preheating component also includes a seamless square tube 104 and a water storage cavity 105. A seamless square tube 104 is provided on one side of the ceramic sheet 103. There are multiple sets of seamless square tubes 104. Two sets of water storage cavities 105 are provided at both ends of the seamless square tube 104. The seamless square tube 104 connects the two sets of water storage cavities 105. The preheating component also includes a circulating water pipe 106 and a temperature gun 107. A circulating water pipe 106 is provided on one side of the water storage cavity 105. There are two sets of circulating water pipes 106. 6 is connected to the external coolant delivery pump, a temperature measuring gun 107 is provided above the upper preheating fixed frame 3, and another set of temperature measuring guns 107 is provided below the lower preheating fixed frame 4. When in use, two sets of circulating water pipes 106 are respectively connected to the water storage chambers 105 on both sides. When the circulating water is connected, the back and both ends of the ceramic sheet 103 are cooled to reduce heat dissipation. The temperature measuring gun 107 detects the surface temperature of the fixed roller 2 through an infrared temperature sensor, and stops heating when the surface temperature of the fixed roller 2 reaches the required working temperature.

[0023] See also Figure 5 、 Figure 6 、 Figure 7 and Figure 8 In this embodiment, the adjustment component includes a first motor 301 and a first screw 302. The first motor 301 is provided on one side of the frame 1, and the first screw 302 is provided at the output end of the first motor 301. The adjustment component also includes a movable frame 303. The outer side of the first screw 302 is threadedly connected to the movable frame 303. When in use, the first motor 301 is started to drive the first screw 302 to rotate, and the first screw 302 is rotated to drive the movable frame 303 to move linearly, so that the horizontal positions of the upper preheating fixed frame 3 and the lower preheating fixed frame 4 can be adjusted respectively. The adjustment component also includes There are a second motor 304 and a second lead screw 305. The second motor 304 is arranged above the movable frame 303. The second lead screw 305 is arranged at the output end of the second motor 304. The adjustment component also includes a lifting frame 306. The outer side of the second lead screw 305 is threadedly connected to the lifting frame 306. The lifting frame 306 and the upper preheating fixed frame 3 are connected to each other. When in use, the second motor 304 is started to drive the second lead screw 305 to rotate, and the second lead screw 305 is rotated to drive the lifting frame 306 to move up and down, so that the vertical positions of the upper preheating fixed frame 3 and the lower preheating fixed frame 4 can be adjusted respectively.

[0024] The laser displacement sensor array 202 specifically includes the following steps when collecting data: S101: The controller 5 sends a start command to the laser displacement sensor array 202. All laser displacement sensors enter the operating state synchronously, emitting laser beams at a fixed frequency toward the roller surface and receiving reflected signals. Each sensor independently measures the real-time distance data of its corresponding scanning point, forming a raw data stream containing lateral position coordinates and longitudinal distance values. S102: The roller is in a rotating state, and the sensor array synchronously obtains the angular displacement information of the roller through the encoder built into the rolling mill equipment. The measurement data of different sensors are spatially aligned according to the timestamp and the roller rotation angle, so that each measurement point corresponds to the actual position of the roller surface; S103: Dynamic threshold filtering is performed on the original data stream to remove abnormal jump points caused by the oxide layer, oil pollution and vibration on the roller surface; the specific method is as follows: The mean and standard deviation of the distances within multiple rotation cycles at the same lateral position were calculated, and measurements that deviated from the mean by more than three times the standard deviation were marked as abnormal and discarded. The remaining valid data were processed in the next stage.

[0025] The controller 5 specifically includes the following steps when analyzing data: S201: The controller 5 retrieves the reference distance data of the roller surface during initial installation, i.e., the Z-axis value in the unworn state, compares it with the current measurement data, and calculates the wear depth ΔZ of the X-axis at each X-axis position; generates a wear profile curve of the roller surface by polynomial fitting or piecewise linear interpolation, and calculates the maximum wear amount and average wear amount; S202: Based on the heat conduction characteristics of the roller material and the preheating efficiency model, the initial optimal heating distance D0 is preset; combined with the current wear amount, the optimal heating distance is dynamically corrected to: D = D0+α·ΔZ; Where α is the wear compensation coefficient; the allowable error range ΔD is defined to form the dynamic threshold range of the heating distance [D-ΔD, D+ΔD]; S203: The distance Z from the roller surface to the preheating component measured in real time by the laser displacement sensor array 202 is converted to 实时 Compare with dynamic threshold range; If there is Z 实时 If it exceeds [D-ΔD, D+ΔD], it is determined that the preheating component needs to be adjusted, and the lateral range and deviation of the out-of-tolerance area ΔD=Z are recorded. 实时 -D.

[0026] The controller 5 specifically includes the following steps when generating a control instruction: S301: Determine the preheating component that needs to be adjusted based on the lateral range of the out-of-tolerance area; If the out-of-tolerance area is located at the upper part of the roll, adjust the upper preheating fixed frame 3; if it is located at the lower part, adjust the lower preheating fixed frame 4. The adjustment amount ΔY is calculated based on the deviation amount ΔD, using the proportional control algorithm: ΔY=Kp·ΔD; Where Kp is the proportional coefficient; S302: The controller 5 decomposes the adjustment amount ΔY into horizontal and vertical displacement instructions. For horizontal adjustment, the first motor 301 drives the first lead screw 302, which drives the movable frame 303 to move ΔX along the X axis. For vertical adjustment, the second motor 304 drives the second lead screw 305, which drives the lifting frame 306 to move ΔZ along the Z axis. S303: During the adjustment process, the laser displacement sensor array 202 continuously monitors the distance from the roller surface to the preheating component. When the Z of all measuring points is 实时 When both enter the dynamic threshold range [D-ΔD, D+ΔD], the controller 5 sends a stop command to terminate the adjustment and lock the position of the preheating component; if the adjustment times exceed the preset maximum value and the conditions are still not met, an alarm is triggered and manual intervention is prompted.

[0027] During operation, first, the upper preheating fixed frame 3 and the lower preheating fixed frame 4 are positioned to the initial installation position through the frame 1 to ensure that the preheating assembly maintains a preset optimal heating distance with the surface of the fixed roller 2; the heating plate 101 is activated and energized by the controller 5, and the heating plate 101 releases heat to preheat the surface of the fixed roller 2, the thermal insulation fiber 102 reduces heat loss, and the ceramic plate 103 achieves electrical insulation; at the same time, two sets of circulating water pipes 106 are connected to the water storage chamber 105, and the external coolant delivery pump is started. The circulating water flows in the seamless square tube 104 to cool the back and both ends of the ceramic plate 103 to prevent heat from overflowing; at this time, the temperature measuring gun 107 monitors the roller surface temperature in real time through the infrared temperature sensor. When the temperature reaches the set working threshold, the controller 5 automatically reduces the heating power to maintain a constant temperature; During the rolling process, the fixed roller 2 gradually wears due to friction, and its diameter decreases. At this time, the laser displacement sensor array 202 of the detection component starts working: the controller 5 sends a command to the array, and all laser displacement sensors synchronously emit laser beams and receive reflected signals, measuring the real-time distance data from the roller surface to the sensor. Combined with the roller angular displacement information provided by the rolling mill's built-in encoder, the system spatially aligns the measured data according to the timestamp and rotation angle to generate a three-dimensional profile of the roller surface. Subsequently, a dynamic threshold filtering algorithm is used to remove abnormal data points caused by oxide layers, oil stains, or vibration, retaining valid wear information. The controller 5 retrieves the baseline distance data from the initial installation, compares it with the current measurement value, calculates the wear depth at each lateral position, and generates a wear profile curve to determine the maximum wear amount and the average wear amount. Based on the wear data and the preheating efficiency model, the controller 5 dynamically adjusts the optimal heating distance and sets an allowable error range ΔD, forming a dynamic threshold range [D-ΔD, D+ΔD]. When the laser displacement sensor array 202 detects that the distance Z from the roller surface to the preheating assembly exceeds this range in real time, the controller 5 determines that the preheating assembly position needs to be adjusted. If the out-of-tolerance area is located above the roller, the adjustment component of the upper preheating fixed frame 3 is activated; if it is located below, the adjustment component of the lower preheating fixed frame 4 is activated. During adjustment, the first motor 301 drives the first screw 302 to move the movable frame 303 horizontally, and the second motor 304 drives the second screw 305 to move the lifting frame 306 vertically, with an adjustment amount ΔY = Kp·ΔD. During the adjustment process, the laser displacement sensor array 202 continuously monitors the distance. When all measurement points enter the threshold range, adjustment stops and the position is locked. If the adjustment exceeds the limit, an alarm is triggered, prompting manual intervention. Through this closed-loop control, dynamic compensation of the preheating assembly after roller wear is achieved, ensuring constant heating efficiency.

[0028] Through the above steps, the controller 5 energizes the heating plate 101 to release heat to preheat the surface of the fixed roller 2 in the frame 1, thereby increasing the surface temperature of the fixed roller 2. The multi-layer insulation fiber 102 provides thermal insulation and protection, and the ceramic plate 103 provides insulation to prevent the frame 1 from conducting electricity after the heating plate 101 is energized. The laser displacement sensor array 202 is activated to continuously scan and detect the distance between the surface of the fixed roller 2 and the laser displacement sensor array 202. The detection results are transmitted to the controller 5 using the wireless transmission unit built into the laser displacement sensor array 202. The detection results are analyzed to determine the degree of surface wear of the fixed roller 2. The data detected by the laser displacement sensor array 202 is organized to calculate the threshold range of the optimal distance when the heating plate 101 heats the fixed roller 2. When the distance exceeds the threshold range of the optimal distance, the controller 5 sends a control instruction to the adjustment mechanism to adjust the position of the upper preheating fixed frame 3 and the lower preheating fixed frame 4, thereby maintaining a constant radiation distance between the heating point and the roller, thereby improving heating efficiency.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. An online preheating device for a section rolling mill roll, comprising a frame (1), a fixed roll (2), an upper preheating fixed frame (3) and a lower preheating fixed frame (4), characterized in that: The machine also includes a controller (5), a preheating component, a detection component and an adjustment component. A fixed roller (2) is provided on the inner side of the frame (1). An upper preheating fixed frame (3) is provided on the inner side of the frame (1). A lower preheating fixed frame (4) is provided on the inner side of the frame (1). A controller (5) is provided on one side of the frame (1). A preheating component is provided on the inner side of the upper preheating fixed frame (3). Two groups of preheating components are provided. Another group of preheating components is located on the inner side of the lower preheating fixed frame (4). A detection component is provided above the upper preheating fixed frame (3). Another group of detection components is provided below the lower preheating fixed frame (4). An adjustment component is provided on the inner side of the frame (1). The preheating assembly comprises a heating plate (101), a heat-insulating fiber (102) and a ceramic plate (103); the heating plate (101) is arranged on the inner side of the upper preheating fixing frame (3); the heat-insulating fiber (102) is arranged on one side of the heating plate (101); the heat-insulating fiber (102) is arranged on one side of the heat-insulating fiber (102); the ceramic plate (103) is arranged on the other side of the heat-insulating fiber (102); and the heating plate (101) is electrically connected to an external power supply device; The detection component comprises a mounting plate (201) and a laser displacement sensor array (202); the mounting plate (201) is arranged above the upper preheating component; the laser displacement sensor array (202) is arranged on one side of the mounting plate (201); the laser displacement sensor array (202) integrates multiple groups of laser displacement sensors distributed in a horizontal array; the laser displacement sensor array (202) and the controller (5) are electrically connected.

2. The online preheating device for section mill rolls according to claim 1, characterized in that: The preheating assembly further comprises a seamless square tube (104) and a water storage cavity (105). The seamless square tube (104) is provided on one side of the ceramic sheet (103). Multiple groups of seamless square tubes (104) are provided. Two groups of water storage cavities (105) are provided at both ends of the seamless square tube (104). The seamless square tube (104) connects the two groups of water storage cavities (105).

3. The online preheating device for section mill rolls according to claim 2, characterized in that: The preheating assembly further includes a circulating water pipe (106) and a temperature measuring gun (107). A circulating water pipe (106) is provided on one side of the water storage chamber (105). Two groups of circulating water pipes (106) are provided. The two groups of circulating water pipes (106) are connected to an external coolant delivery pump. A temperature measuring gun (107) is provided above the upper preheating fixed frame (3), and another group of temperature measuring guns (107) is provided below the lower preheating fixed frame (4).

4. The online preheating device for section mill rolls according to claim 1, characterized in that: The adjustment component comprises a first motor (301) and a first lead screw (302); the first motor (301) is provided on one side of the frame (1); and the first lead screw (302) is provided at the output end of the first motor (301).

5. The online preheating device for section mill rolls according to claim 4, characterized in that: The adjustment assembly further comprises a movable frame (303), and the outer side of the first lead screw (302) is threadedly connected to the movable frame (303).

6. The online preheating device for section mill rolls according to claim 5, characterized in that: The adjustment component further comprises a second motor (304) and a second lead screw (305). The second motor (304) is arranged above the movable frame (303), and the second lead screw (305) is arranged at the output end of the second motor (304).

7. The online preheating device for section mill rolls according to claim 6, characterized in that: The adjustment assembly further comprises a lifting frame (306), the outer side of the second lead screw (305) is threadedly connected to the lifting frame (306), and the lifting frame (306) and the upper preheating fixing frame (3) are connected to each other.

8. The online preheating device for section mill rolls according to claim 1, characterized in that: The laser displacement sensor array (202) specifically includes the following steps when collecting data: S101: The controller (5) sends a start instruction to the laser displacement sensor array (202), and all laser displacement sensors enter the working state synchronously, emit laser beams to the roller surface at a fixed frequency, and receive reflected signals. Each sensor independently measures the real-time distance data of its corresponding scanning point, forming a raw data stream containing lateral position coordinates and longitudinal distance values; S102: The roller is in a rotating state, and the sensor array synchronously obtains the angular displacement information of the roller through the encoder built into the rolling mill equipment. The measurement data of different sensors are spatially aligned according to the timestamp and the roller rotation angle, so that each measurement point corresponds to the actual position of the roller surface; S103: Dynamic threshold filtering is performed on the original data stream to remove abnormal jump points caused by the oxide layer, oil pollution and vibration on the roller surface; the specific method is as follows: The mean and standard deviation of the distances within multiple rotation cycles at the same lateral position were calculated, and measurements that deviated from the mean by more than three times the standard deviation were marked as abnormal and discarded. The remaining valid data were processed in the next stage.

9. The online preheating device for section mill rolls according to claim 1, characterized in that: The controller (5) specifically includes the following steps in analyzing the data: S201: The controller (5) retrieves the reference distance data of the roller surface during initial installation, i.e., the Z-axis value in the unworn state, compares it with the current measurement data, and calculates the wear depth ΔZ of the X-axis at each X-axis position; generates a wear profile curve of the roller surface by polynomial fitting or piecewise linear interpolation, and calculates the maximum wear amount and the average wear amount; S202: Based on the heat conduction characteristics of the roller material and the preheating efficiency model, the initial optimal heating distance D0 is preset; combined with the current wear amount, the optimal heating distance is dynamically corrected to: D = D0+α·ΔZ; Where α is the wear compensation coefficient; the allowable error range ΔD is defined to form the dynamic threshold range of the heating distance [D-ΔD, D+ΔD]; S203: The distance Z from the roller surface to the preheating component measured in real time by the laser displacement sensor array (202) 实时 Compare with dynamic threshold range; If there is Z 实时 If it exceeds [D-ΔD, D+ΔD], it is determined that the preheating component needs to be adjusted, and the lateral range and deviation of the out-of-tolerance area ΔD=Z are recorded. 实时 -D.

10. The online preheating device for section mill rolls according to claim 7, characterized in that: The controller (5) specifically includes the following steps when generating a control instruction: S301: Determine the preheating component that needs to be adjusted based on the lateral range of the out-of-tolerance area; If the out-of-tolerance area is located at the upper part of the roll, adjust the upper preheating fixed frame (3); if it is located at the lower part, adjust the lower preheating fixed frame (4); the adjustment amount ΔY is calculated based on the deviation amount ΔD, using the proportional control algorithm: ΔY=Kp·ΔD; Where Kp is the proportional coefficient; S302: The controller (5) decomposes the adjustment amount ΔY into displacement instructions in the horizontal and vertical directions; for horizontal adjustment, the first motor (301) drives the first lead screw (302) to drive the movable frame (303) to move ΔX along the X axis; for vertical adjustment, the second motor (304) drives the second lead screw (305) to drive the lifting frame (306) to move ΔZ along the Z axis; S303: During the adjustment process, the laser displacement sensor array (202) continuously monitors the distance from the roller surface to the preheating component. When the Z of all measuring points is 实时 When both enter the dynamic threshold range [D-ΔD, D+ΔD], the controller (5) sends a stop command to terminate the adjustment and lock the position of the preheating component; if the adjustment times exceed the preset maximum value and the conditions are still not met, an alarm is triggered and manual intervention is prompted.

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