Special steel plate rolling equipment and process

Abstract

The application relates to the technical field of steel plate rolling, in particular to a special steel plate rolling device and process, which comprises a rolling device composed of a machine base, four roller bases, two rolling rollers, a lifting cylinder I, a roller frame, a plurality of conveying rollers and a lifting cylinder II, and a detection auxiliary mechanism is arranged on the machine base; the detection auxiliary mechanism comprises a hollow detection shell, an external air pipe, a sealing sliding seat arranged in the detection shell, a detection assembly and a jet pipe; an adjusting assembly for adjusting the jet pipe is further arranged in the detection shell; and a pushing arm is arranged between the detection assembly and the sealing sliding seat. The special steel plate rolling device and process are characterized in that the thicker the strip steel or the more intense the vibration, the more narrowed the top end of the jet pipe, the higher the outlet airflow speed, the self-adaptive enhancement of the blowing strength, and the closer the detection roller is to the machine base due to the increase of the pneumatic pressure, so that the detection reliability and the blowing effect are improved.

Description

Technical Field

[0001] This application relates to the field of steel plate rolling technology, and in particular to a special steel plate rolling equipment and process. Background Technology

[0002] In the field of special steel plate rolling, the surface of the rolled strip often retains a large amount of coolant and emulsion, which needs to be dried before entering the next process. At the same time, in order to ensure rolling quality, it is also necessary to monitor the uniformity of strip thickness and the vibration during the rolling process in real time.

[0003] Existing technologies already include solutions that integrate drying, thickness measurement, and vibration measurement functions into a single mechanism. For example, patent document CN122298810A discloses a cold rolling mill whose air-blowing detection auxiliary mechanism simultaneously drives the sheet wheel to press down and contact the strip steel and opens the guide air jet nozzle through a thrust trapezoidal block, achieving preliminary integration of drying and detection; however, this application still has the following drawbacks:

[0004] If adaptive control of detection and purging operations cannot be achieved, and it is difficult to physically distinguish between low-frequency deformation due to thermal expansion and contraction and high-frequency mechanical vibration during the steel plate rolling process, the detection signals are easily mixed, and the accuracy of thickness and vibration monitoring is insufficient, which in turn leads to lag in the adjustment of rolling parameters. In addition, the airflow pattern of the purging structure is fixed, and it is impossible to dynamically adjust the air pressure and coverage range according to the degree of defects on the steel plate surface. This easily leads to residual impurities on the plate surface and uneven cooling, which in turn causes quality defects such as steel plate rolling deformation, cracks, and indentations. Therefore, a special steel plate rolling equipment and process are proposed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a special steel plate rolling equipment and process, which has advantages such as adjustable nozzle cross-section and adaptive feedback adjustment of detection signals, thus solving the aforementioned problems.

[0006] This application provides a special steel plate rolling equipment and process, adopting the following technical solution:

[0007] A special steel plate rolling equipment includes a rolling device consisting of a machine base, four roll stands, two rolling rolls, a lifting cylinder one, a roll frame, several conveying rolls, and a lifting cylinder two. The machine base is equipped with a detection auxiliary mechanism.

[0008] The detection auxiliary mechanism includes a hollow detection housing, an external air pipe, a sealing slide seat inside the detection housing, a detection component, and an air jet pipe. The detection housing also has an adjustment component for adjusting the air jet pipe. A push arm is provided between the detection component and the sealing slide seat. The flange of the external air pipe is installed on the outer wall of the detection housing. Air is supplied to the detection housing through the external air pipe, creating high pressure inside the detection housing to push the sealing slide seat, thereby driving the detection component to move down and contact the steel plate. At the same time, the air jet pipe sprays high-pressure airflow to cool and dry the surface of the steel plate.

[0009] Optionally: The top side of the detection housing is equipped with a mounting base fixed to the side wall of the base; the detection assembly includes a lifting plate, guide rollers, a hollow sleeve, a telescopic rod, detection rollers, a pressure sensor, and a detection component; the push arm is hinged between the lifting plate and the sealing slide, and the push arm is inclined; a limit assembly is provided between the lifting plate and the detection housing, wherein the limit assembly consists of a telescopically connected limit block and a limit rod.

[0010] Optionally: The detection housing has a cavity inside, in which a sealing slide is slidably disposed within the cavity, dividing the cavity into left and right parts. The detection component and the adjustment component are distributed on the left and right sides of the cavity. A guide roller is rotatably mounted on one side of the lifting plate. The lifting plate is located in front of the sealing slide. When the sealing slide moves, the lifting plate moves accordingly. At the same time, the guide roller contacts the cavity first and drives the lifting plate to move downward through the push arm.

[0011] Optionally: A return spring connected to the chamber is installed on the outer wall of the sealing slide; the sleeve bolt is installed on the bottom side of the lifting plate; the telescopic rod slides through the sleeve and the interior of the lifting plate, and the bottom end of the telescopic rod extends to the bottom of the detection housing; the pressure sensing element consists of a pressure sensing seat and a pressure spring, both of which are wound around the outer surface of the telescopic rod, and the bottom side of the pressure spring is connected and fixed to the top side of the pressure sensing seat.

[0012] Optionally, the detection component includes a hollow rotating sleeve, a scale fixed to the outer surface of the rotating sleeve, and an indicator rod fixed to the top side of the lifting plate, the indicator rod being located above the scale. The top end of the telescopic rod extends into the interior of the rotating sleeve, and a guide wheel is installed at the top end of the telescopic rod. A guide groove is provided inside the rotating sleeve to roll and engage with the guide wheel. The guide groove consists of a straight groove and a spiral groove, which are distributed vertically and connected. When the telescopic rod moves upward by a large amount, the guide wheel rolls in the guide groove. First, the guide wheel moves in the straight groove and then enters the spiral groove according to the displacement, thereby driving the rotating sleeve to rotate. The detection engagement is achieved through the scale and the pressure sensor seat.

[0013] Optionally: The bottom end of the jet pipe extends to the outside of the detection housing; the adjustment assembly is disposed outside the jet pipe and is linked to the displacement of the sealing slide and the pressure sensor; the adjustment assembly includes a guide plate, a slider sliding outside the guide plate, a wedge seat disposed below the slider, a vertical plate fixed to the bottom side of the slider, an abutment sliding inside the vertical plate, and a compression wheel mounted on the abutment; an interference fit wedge surface is provided between the wedge seat and the slider; the wedge seat is fixed to the outer wall of the sealing slide; the inner side of the guide plate is provided with a guide surface that abuts against the abutment; when the sealing slide moves, the wedge seat moves accordingly and drives the slider to move upward through the wedge surface; the slider drives the abutment to move upward and, guided by the guide surface, drives the abutment to squeeze the top side of the jet pipe, making its top side narrower.

[0014] Optionally, the limiting component includes a concave abutment frame, a telescopic shaft fixed to one side of the abutment frame and passing through the vertical plate, and a ball bearing rotatably mounted on the other end of the telescopic shaft and abutting against the guide surface. The extrusion wheel is rotatably mounted on the inner side of the abutment frame, and a return spring is installed between the abutment frame and the vertical plate.

[0015] Optionally: the slider has a limiting opening inside that is fitted onto the outside of the guide plate, and a limiting protrusion is fixed inside the limiting opening; the side wall of the guide plate has a limiting groove that slides with the limiting protrusion; there are multiple adjusting components, and the multiple adjusting components are distributed in a ring; the multiple sliders are bolted together with a limiting ring fitted onto the outside of the jet pipe.

[0016] Optionally: The two rolling rolls are distributed vertically, with their two ends respectively mounted on opposite sides of the four roll seats, and a drive structure is provided on one of the upper roll seats; the machine base has two adjustment slides inside, and the four roll seats are slidably mounted in the adjustment slides; a lifting cylinder one for adjusting the two rolling rolls is installed inside the machine base, and a cylinder seat is provided on the side wall of the machine base outside the lifting cylinder two; the output end of the lifting cylinder two is connected to the roll frame.

[0017] Another problem that this invention also needs to solve is to provide a special steel plate rolling process, including the following steps:

[0018] S1: Slab heating

[0019] The special steel plate slab to be rolled is fed into a heating furnace for heating. The heating temperature is determined according to the steel grade and the target rolling thickness to ensure that the slab reaches a suitable rolling temperature and has sufficient plasticity and low deformation resistance in the subsequent rolling process.

[0020] S2: Rough rolling

[0021] The heated slab is fed into a roughing mill for multiple passes of roughing. During the roughing process, the reduction and rolling speed of each pass are controlled to initially roll the slab into an intermediate slab. The thickness of the intermediate slab after roughing is greater than the thickness of the target finished product.

[0022] S3: Finish rolling

[0023] The intermediate billet after rough rolling is fed into a finishing mill consisting of rolling units for finishing rolling; during the finishing rolling process:

[0024] The lifting cylinder drives four roller seats to slide within the adjusting slide, adjusting the size of the roller gap between two rolling rolls and controlling the reduction in finishing rolling.

[0025] The drive structure drives the rolling rolls to rotate, performing multiple passes of precision rolling on the intermediate billet until the strip thickness reaches the target finished product thickness;

[0026] The conveyor rollers are raised and lowered under the drive of the second lifting cylinder to convey and guide the strip steel.

[0027] S4: Online detection and drying

[0028] After finishing, the strip steel passes below the inspection auxiliary mechanism, which simultaneously performs the following operations:

[0029] Compressed gas is introduced into the detection housing through an external air tube, creating high pressure inside the chamber and pushing the sealing slide.

[0030] The sealing slide moves the lifting plate downwards via the push arm, causing the detection roller to contact the surface of the strip steel;

[0031] The detection rollers roll with the movement of the strip, and the telescopic rod slides inside the sleeve according to the changes in strip thickness and vibration.

[0032] The pressure sensor seat detects the change in the compression of the pressure spring and outputs a thickness detection signal; the guide wheel rolls in the guide groove, and when the displacement of the telescopic rod exceeds the preset threshold, the guide wheel enters the spiral groove and drives the rotating sleeve to rotate, and the scale and indicator rod work together to output a large displacement detection signal;

[0033] At the same time, the jet pipe sprays high-pressure, high-speed airflow to dry the surface of the strip steel;

[0034] When an increase in strip thickness or aggravation of vibration is detected, the displacement of the sealing slide increases, the tip of the jet pipe narrows further, the airflow velocity increases, the pneumatic pressure is enhanced, and the auxiliary detection rollers fit more tightly against the strip surface.

[0035] S5: Winding

[0036] After inspection and drying, the finished steel strip is fed into a coiler for winding to form a steel coil.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. This invention visualizes steel plate surface defect data through the combination of a dial and an indicator rod, and accurately collects rolling pressure data through pressure sensors. Workers can intuitively grasp the plate condition and rolling conditions, which facilitates timely adjustment of parameters such as rolling roll gap, conveying speed, and air supply pressure, making it easier to process special steel plates.

[0039] 2. The present invention, by guiding the roller to contact the chamber first to form a limiting structure, ensures that the detection roller contacts the strip steel before the squeezing action of the jet pipe, so that the benchmark for thickness detection and vibration monitoring is established before the purge airflow is turned on, avoiding interference to the detection accuracy caused by the impact of high-pressure airflow on the strip steel.

[0040] 3. This invention accurately converts the displacement of the sealing slide into the adjustment degree of the jet pipe. The thicker the strip or the more severe the vibration, the greater the displacement of the sealing slide, the more the top of the jet pipe narrows, the higher the outlet airflow velocity, and the purging intensity is adaptively enhanced. At the same time, the increased pneumatic pressure makes the detection roller fit more tightly, achieving a dual improvement in detection reliability and drying effect.

[0041] 4. In this invention, the guide groove is designed so that small displacements of the telescopic rod corresponding to normal thickness fluctuations only trigger pressure detection of the pressure sensor seat, while large displacements corresponding to significant thickness abnormalities or severe vibrations will cause the guide wheel to enter the spiral groove and drive the rotating sleeve to rotate. The scale and indicator rod realize the amplified display and identification of the displacement, effectively balancing the sensitivity of conventional detection and the identification of abnormal working conditions.

[0042] 5. In this invention, multiple adjustment components are distributed in a ring around the outside of the jet pipe and are connected and linked by a limiting ring to ensure that the squeezing force on the jet pipe is evenly distributed in the circumferential direction, avoiding uneven nozzle deformation and airflow deviation caused by unilateral squeezing, and ensuring the symmetry and stability of the purging airflow. Attached Figure Description

[0043] Figure 1 This is a three-dimensional structural view of the rolling apparatus of this application;

[0044] Figure 2 This is a bottom view of the rolling device structure of this application;

[0045] Figure 3 This is a cross-sectional view of the rolling apparatus structure in this application;

[0046] Figure 4 This is a cross-sectional view of the testing auxiliary mechanism structure in this application;

[0047] Figure 5 This is a schematic diagram of the detection component structure in this application;

[0048] Figure 6 This is a schematic diagram of the adjustment component structure of this application;

[0049] Figure 7 This application Figure 4 A magnified structural diagram of structure A is shown below;

[0050] Figure 8 This is a schematic diagram of the structure of the receiving part of this application;

[0051] Figure 9 This is a schematic diagram of the slider structure of this application.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Rolling device; 11. Machine base; 12. Adjusting slide; 13. Roll stand; 14. Rolling roll; 15. Lifting cylinder one; 16. Roll frame; 17. Conveyor roll; 18. Lifting cylinder two; 181. Cylinder base; 19. Drive structure; 2. Detection auxiliary mechanism; 21. Detection housing; 211. Chamber; 22. Mounting seat; 23. External air pipe; 24. Sealed slide; 241. Return spring one; 25. Detection assembly; 251. Lifting plate; 252. Guide roller; 253. Sleeve; 254. Telescopic rod; 255. Detection roller; 256. Pressure sensor seat; 257. Pressure spring; 258. Rotating sleeve; 2 59. Dial; 2510. Indicator rod; 2511. Guide wheel; 2512. Guide groove; 26. Push arm; 27. Limiting assembly; 271. Limiting block; 272. Limiting rod; 28. Jet pipe; 29. ​​Adjusting assembly; 291. Guide plate; 292. Slider; 293. Guide surface; 294. Wedge seat; 295. Wedge surface; 296. Vertical plate; 297. Abutment; 2971. Abutment frame; 2972. Telescopic shaft; 2973. Ball bearing; 2974. Second return spring; 298. Extrusion wheel; 299. Limiting ring; 2910. Limiting opening; 2911. Limiting protrusion; 2912. Limiting groove. Detailed Implementation

[0054] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.

[0055] Example 1, as Figures 1-3 As shown, this embodiment provides a special steel plate rolling equipment, including a rolling device 1 composed of a machine base 11, four roll seats 13, two rolling rolls 14, a lifting cylinder 15, a roll frame 16, several conveying rolls 17, and a lifting cylinder 18. It should be noted that the machine base 11 has two adjusting slides 12 inside, and the four roll seats 13 are slidably installed within the adjusting slides 12. The two rolling rolls 14 are distributed vertically, with their ends respectively installed on opposite sides of the four roll seats 13. A drive structure 19 is provided on one of the upper roll seats 13 to drive the rolling roll 14 to rotate. The lifting cylinder 15, which adjusts the distance between the two rolling rolls 14, is installed inside the machine base 11. The lifting cylinder 18 has a cylinder seat 181 installed on the side wall of the machine base 11. The output end of the lifting cylinder 18 is connected to the roll frame 16 to drive the roll frame 16 and the conveying rolls 17 on it to rise and fall, thereby realizing the conveying and guiding of the strip steel.

[0056] An auxiliary inspection mechanism 2 is fixedly installed on the side wall of the machine base 11 via a mounting base 22. It should be noted that one set of auxiliary inspection mechanisms 2 is set on each of the upper and lower sides of the machine base 11, with the two sets symmetrically arranged around the strip steel, simultaneously inspecting and drying the upper and lower surfaces of the strip steel. The external air pipes 23 of both sets of auxiliary inspection mechanisms 2 are connected to the same air supply system, which adjusts the air supply pressure uniformly based on the comprehensive judgment results of the two sets of inspection data. It is worth mentioning that by blowing away impurities on the plate surface and cooling it with air, impurities that easily cause indentations and scratches on the plate surface during rolling are effectively removed. At the same time, the temperature of the steel plate is reduced, avoiding quality defects such as deformation, coarse grains, and cracks caused by high-temperature rolling, significantly improving the flatness of the special steel plate surface after rolling.

[0057] like Figures 3-9 As shown, specifically, the detection auxiliary mechanism 2 includes a hollow detection housing 21, with a chamber 211 inside. An external air pipe 23 is mounted on a flange on the outer wall of the detection housing 21 for introducing compressed gas into the chamber 211. A sealing slide 24 is slidably disposed within the chamber 211, dividing the chamber 211 into left and right parts. A return spring 241, connected to the inner right wall of the chamber 211, is mounted on the outer wall of the sealing slide 24.

[0058] like Figure 4 and Figure 5 As shown, a detection assembly 25 is provided on the left side of the detection housing 21. A push arm 26, arranged at an angle, is hinged between the detection assembly 25 and the sealing slide 24. The detection assembly 25 includes a lifting plate 251, a guide roller 252, a hollow sleeve 253, a telescopic rod 254, a detection roller 255, a pressure sensor, and a detection element. To achieve stable downward movement of the lifting plate 251, a guide roller 252 is rotatably mounted on one side of the lifting plate 251, and the guide roller 252 is used for rolling contact with the inner wall of the chamber 211. A limit assembly 27 is provided between the lifting plate 251 and the detection housing 21. The limit assembly 27 consists of a telescopically connected limit block 271 and a limit rod 272, used to limit the displacement stroke of the lifting plate 251. The limit block 271 is fixed to the outer wall of the detection housing 21, and the limit rod 272 is fixed to the top side of the lifting plate 251.

[0059] like Figure 5As shown, specifically, the sleeve 253 is bolted to the bottom side of the lifting plate 251, and the telescopic rod 254 slides through the sleeve 253 and the lifting plate 251. The bottom end of the telescopic rod 254 extends to the bottom of the detection housing 21 and is equipped with a detection roller 255. The pressure sensing element consists of a pressure sensing seat 256 and a pressure spring 257. Both the pressure sensing seat 256 and the pressure spring 257 are wound around the outer surface of the telescopic rod 254, and the bottom side of the pressure spring 257 is connected and fixed to the top side of the pressure sensing seat 256. It should be noted that the bottom of the detection housing 21 has a lower window for the detection roller 255 to extend and retract. A sealing scraper (not shown in the figure) is installed on the edge of the lower window to scrape off the debris attached to the surface of the detection roller 255 when it retracts. The side wall of the detection housing 21 is also provided with an exhaust hole (not shown in the figure) to balance the air pressure inside the chamber 211 and prevent air resistance from forming inside the chamber 211 when the sealing slide 24 is in motion.

[0060] To further enhance the detection effect, such as Figure 5 As shown, the detection component includes a hollow rotating sleeve 258, a scale 259 fixed to the outer surface of the rotating sleeve 258, and an indicator rod 2510 fixed to the top side of the lifting plate 251, with the indicator rod 2510 positioned above the scale 259. The top end of the telescopic rod 254 extends into the interior of the rotating sleeve 258, and a guide wheel 2511 is mounted on the top end of the telescopic rod 254. A guide groove 2512 is formed inside the rotating sleeve 258 to roll in cooperation with the guide wheel 2511. The guide groove 2512 consists of a straight groove and a spiral groove, which are distributed vertically and connected. It should be noted that the helix angle of the spiral groove in the guide groove 2512 is 15°-30°. When the upward movement of the telescopic rod 254 exceeds the preset threshold, the corresponding change in strip thickness exceeds the set range, or the vibration amplitude exceeds the safety value, the guide wheel 2511 enters the spiral groove. The axial displacement of the telescopic rod 254 corresponding to each rotation of the rotating sleeve 258 is amplified by the spiral helix angle. The cooperation between the scale 259 and the indicator rod 2510 can achieve accurate readings of micron-level displacement.

[0061] To achieve the removal of impurities and air cooling of steel plate surface before rolling, such as Figure 4 As shown, a jet pipe 28 is provided on the right side of the detection housing 21. The bottom end of the jet pipe 28 extends to the outside of the detection housing 21 and is used to spray high-pressure gas onto the surface of the strip steel.

[0062] To further improve the impurity purging and air-cooling effects, an adjustment component 29 is provided on the outside of the jet pipe 28. The adjustment component 29 is linked with the displacement of the sealing slide 24 and the pressure sensor. It should be noted that the top of the jet pipe 28 is made of elastic flexible hose material, and its outer wall is covered with a wear-resistant reinforcing layer. When the extrusion roller 298 applies extrusion force to the top of the jet pipe 28, the top of the jet pipe 28 radially contracts, and its outlet cross-section changes from a circle to a flat ellipse. The ejected airflow is distributed in a fan-shaped air curtain, covering a wider area in the width direction of the strip.

[0063] In addition, such as Figures 6-8 As shown, there are multiple adjustment components 29, and the multiple adjustment components 29 are distributed in a ring around the circumference of the jet pipe 28. The multiple sliders 292 are bolted together with a limiting ring 299 sleeved on the outside of the jet pipe 28.

[0064] like Figures 6-8 As shown, specifically, the adjustment assembly 29 includes a guide plate 291, a slider 292 sliding outside the guide plate 291, a wedge seat 294 disposed below the slider 292, a vertical plate 296 fixed to the bottom side of the slider 292, an abutment member 297 sliding inside the vertical plate 296, and a pressing wheel 298 mounted on the abutment member 297. An interference fit wedge surface 295 is provided between the wedge seat 294 and the slider 292, and the wedge seat 294 is fixed to the outer wall of the sealing slide 24. The inner side of the guide plate 291 is provided with a guide surface 293 that abuts against the abutment member 297. Specifically, while the air pressure drives the sealing slide 24 to move, high-pressure gas is simultaneously introduced into the jet pipe 28, and a high-speed, high-pressure airflow is ejected from the bottom end to sweep the surface of the moving steel plate in all directions, removing impurities such as oxide scale, dust, and iron filings. At the same time, the high-speed airflow achieves rapid air cooling of the plate surface, reducing the temperature in front of the steel plate and preventing deformation and cracking defects caused by high-temperature rolling. During the movement of the sealing slide 24, the wedge seat 294 is moved synchronously. Through the inclined surface transmission of the wedge surface 295, the abutment 297 and the extrusion wheel 298 move upward. Under the guidance of the guide surface 293, the abutment 297 retracts inward, and the extrusion wheel 298 squeezes the upper pipe wall of the jet pipe 28, reducing the diameter of the air outlet of the jet pipe 28. This achieves an adaptive linkage adjustment effect where the larger the detection displacement and the more obvious the deviation of the steel plate surface, the greater the displacement of the sealing slide 24, the higher the degree of extrusion deformation of the jet pipe 28, and the greater the airflow velocity and air pressure. This results in a greater self-adaptive linkage adjustment effect where the larger the steel plate defect, the higher the air cooling purging intensity.

[0065] like Figure 7 and Figure 8As shown, the abutment member 297 includes a concave abutment frame 2971, a telescopic shaft 2972 ​​fixed to one side of the abutment frame 2971 and passing through the vertical plate 296, and a ball bearing 2973 rotatably mounted on the other end of the telescopic shaft 2972 ​​and abutting against the guide surface 293. The extrusion wheel 298 is rotatably mounted on the inner side of the abutment frame 2971. A return spring 2974 is installed between the abutment frame 2971 and the vertical plate 296.

[0066] To ensure the stable movement of slider 292, such as Figure 9 As shown, the slider 292 has a limiting opening 2910 that is sleeved on the outside of the guide plate 291, and a limiting protrusion 2911 is fixed on the inner side of the limiting opening 2910. A limiting groove 2912 that slides with the limiting protrusion 2911 is provided on the side wall of the guide plate 291.

[0067] Example 2: Another problem that the present invention needs to solve is to provide a special steel plate rolling process, including the following steps:

[0068] S1: Slab heating

[0069] The special steel plate slab to be rolled is fed into a heating furnace for heating. The heating temperature is determined according to the steel grade and the target rolling thickness to ensure that the slab reaches a suitable rolling temperature and has sufficient plasticity and low deformation resistance in the subsequent rolling process.

[0070] S2: Rough rolling

[0071] The heated slab is fed into a roughing mill for multiple passes of roughing. During the roughing process, the reduction and rolling speed of each pass are controlled to initially roll the slab into an intermediate slab. The thickness of the intermediate slab after roughing is greater than the thickness of the target finished product.

[0072] S3: Finish rolling

[0073] The intermediate billet after rough rolling is fed into the finishing mill unit consisting of rolling unit 1 for finishing rolling; during the finishing rolling process:

[0074] The lifting cylinder 15 drives the four roller seats 13 to slide within the adjusting slide 12, adjusting the size of the roller gap between the two rolling rollers 14 and controlling the amount of reduction in the finishing rolling.

[0075] The drive structure 19 drives the rolling roll 14 to rotate, performing multiple passes of fine rolling on the intermediate billet until the strip thickness reaches the target finished product thickness.

[0076] The conveyor roller 17 is raised and lowered under the drive of the lifting cylinder 18 to convey and guide the strip steel.

[0077] S4: Online detection and drying

[0078] After finishing, the strip passes under the inspection auxiliary mechanism 2, which simultaneously performs the following operations:

[0079] The external air tube 23 inputs compressed gas into the detection housing 21, and the high pressure generated in the chamber 211 pushes the sealing slide 24 to slide.

[0080] The sealing slide 24 drives the lifting plate 251 to move down through the push arm 26, so that the detection roller 255 contacts the surface of the strip steel;

[0081] The detection roller 255 rolls with the movement of the strip, and the telescopic rod 254 slides inside the sleeve 253 according to the change in strip thickness and vibration.

[0082] The pressure sensor seat 256 detects the change in the compression of the pressure spring 257 and outputs a thickness detection signal; the guide wheel 2511 rolls in the guide groove 2512. When the displacement amplitude of the telescopic rod 254 exceeds the preset threshold, the guide wheel 2511 enters the spiral groove and drives the rotating sleeve 258 to rotate. The scale 259 and the indicator rod 2510 cooperate to output a large displacement detection signal.

[0083] At the same time, the jet pipe 28 ejects high-pressure, high-speed airflow to dry the surface of the strip steel;

[0084] When an increase in strip thickness or intensified vibration is detected, the displacement of the sealing slide 24 increases, the tip of the jet pipe 28 narrows further, the airflow velocity increases, the pneumatic pressure intensifies, and the auxiliary detection roller 255 fits more tightly against the strip surface. It should be noted that as the strip slowly thickens due to thermal expansion or wedge-shaped deformation, the telescopic rod 254 moves upward slowly. The guide wheel 2511 slides within the straight groove, and the rotating sleeve 258 does not rotate. At this time, only the pressure sensor seat 256 outputs a gradually changing pressure signal, and the dial 259 remains stationary. When the strip vibrates at high frequency, the telescopic rod 254 rushes upward rapidly. Due to inertial resistance, the guide wheel 2511 cannot return to its original position in the straight groove in time and directly enters the spiral groove, driving the rotating sleeve 258 to rotate. The system automatically decouples and separates the detection of low-frequency thermal expansion and contraction and high-frequency mechanical vibration at the physical level.

[0085] S5: Winding

[0086] After inspection and drying, the finished steel strip is fed into a coiler for winding to form a steel coil.

[0087] It should be noted that during the online detection and drying process in step S4, the external control system receives the detection signals output by the pressure sensor seat 256 and the dial 259 in real time, and dynamically adjusts the air supply pressure of the external air pipe 23 according to the changes in the detection signals: when the detection signal shows that the strip thickness fluctuates or the vibration amplitude increases, the control system increases the air supply pressure to enhance the purging intensity and pneumatic clamping force; when the detection signal shows that the strip condition is stable, the control system reduces the air supply pressure to the level required to maintain basic drying, thereby achieving energy-saving operation.

[0088] Combined with appendix Figures 1-9 The working principle of the above embodiments is as follows:

[0089] In the initial state, the sealing slide 24 is located at the right limit position of the chamber 211 under the action of the return spring 241, the detection roller 255 is in the raised state, the jet pipe 28 is not squeezed, and the airflow channel is unobstructed. When the equipment is started, the external air pipe 23 inputs compressed gas into the detection housing 21, and high pressure is formed on the right side of the chamber 211, which pushes the sealing slide 24 to slide to the left against the elastic force of the return spring 241.

[0090] When the sealing slide 24 is displaced, the lifting plate 251 is moved by the inclined push arm 26. The guide roller 252 on one side of the lifting plate 251 first contacts the inner wall of the chamber 211 and forms a limit. At this time, the sealing slide 24 continues to displace, and the tilt angle of the push arm 26 changes, forcing the lifting plate 251 to move downward. The lifting plate 251 drives the telescopic rod 254 and the detection roller 255 to move downward synchronously through the sleeve 253 until the detection roller 255 contacts the surface of the strip. After the detection roller 255 contacts the strip, it rolls with the movement of the strip. When the thickness of the strip changes, the detection roller 255 drives the telescopic rod 254 to slide up and down in the sleeve 253. When the telescopic rod 254 moves upward, the pressure spring 257 on its outer surface is compressed, the pressure sensor seat 256 detects the pressure change and outputs a pressure signal corresponding to the thickness change. At the same time, the guide wheel 2511 at the top of the telescopic rod 254 rolls in the guide groove 2512 of the rotating sleeve 258. The guide groove 2512 is composed of straight grooves and spiral grooves distributed vertically and connected. When the upward movement of the telescopic rod 254 is small, the guide wheel 2511 only moves within the straight groove, and the rotating sleeve 258 does not rotate. When the upward movement of the telescopic rod 254 is large, corresponding to a significant change in strip thickness or severe vibration, the guide wheel 2511 enters the spiral groove, driving the rotating sleeve 258 to rotate. The scale 259 fixed on the outer surface of the rotating sleeve 258 rotates accordingly, and the indicator rod 2510 on the top side of the lifting plate 251 can read the rotation angle, realizing the detection of large displacement. When the strip vibrates at high frequency, the telescopic rod 254 produces continuous reciprocating vertical displacement, and the guide wheel 2511 reciprocates at the junction of the straight groove and the spiral groove, driving the rotating sleeve 258 to reciprocate. The swing amplitude and frequency of the scale 259 can reflect the amplitude and frequency of vibration. At the same time, the rotation angle of the scale 259 is detected in conjunction with the pressure sensor seat 256, which facilitates better control of the rolling of the steel plate.

[0091] As the sealing slide 24 moves, the wedge seat 294 fixed to the outer wall of the sealing slide 24 moves synchronously. The wedge seat 294 forms an interference fit with the slider 292 through the wedge surface 295, forcing the slider 292 to slide upward along the guide plate 291. The slider 292 drives the abutment 297 to move upward through the vertical plate 296. The ball 2973 at the end of the abutment 297 rolls along the guide surface 293 on the inner side of the guide plate 291. The inclined profile of the guide surface 293 forces the abutment 297 towards the jet pipe. 28. The horizontal movement in the direction of the jet pipe 28 is followed by the extrusion roller 298 on the inner side of the contact frame 2971 applying extrusion force to the top side of the jet pipe 28, causing the top of the jet pipe 28 to contract radially and narrow its cross-section. After the top of the jet pipe 28 narrows, the outlet velocity increases significantly while the air supply flow remains unchanged, forming a high-speed airflow that powerfully blows away the coolant remaining on the surface of the strip. At the same time, the high-speed airflow impacts the surface of the strip, generating a vertically downward aerodynamic pressure, which helps the detection roller 255 to fit more tightly against the strip.

[0092] When the strip vibration intensifies, the jumping amplitude of the detection roller 255 increases, the reciprocating displacement of the telescopic rod 254 intensifies, and the detection signal output by the pressure sensor seat 256 and the dial 259 is enhanced. According to the change in the detection signal, the external control system adjusts the air supply pressure of the external air pipe 23 to increase the air supply pressure, the displacement of the sealing slide 24 increases, the wedge seat 294 further pushes the slider 292 upward, the extrusion roller 298 deepens the extrusion of the jet pipe 28, the top of the jet pipe 28 becomes narrower, the outlet airflow velocity is higher and the impact force is greater, thereby pressing the detection roller 255 more tightly against the strip surface, resulting in intensified vibration, enhanced detection signal, increased air supply pressure, narrowed nozzle, increased pneumatic pressure, and enhanced roller contact, providing a feedback effect to restore the stability of the detection signal.

[0093] When the external air supply stops, the sealing slide 24 slides to the right and resets under the action of the reset spring 241. The push arm 26 drives the lifting plate 251 and the detection roller 255 to lift upward. At the same time, the wedge seat 294 moves to the right, and the slider 292 slides downward and resets under the action of gravity and the reset spring 2974. The abutment 297 releases the pressure on the jet pipe 28, and the jet pipe 28 returns to its initial unobstructed state by its own elasticity.

[0094] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A special steel plate rolling equipment, comprising a rolling device (1) consisting of a machine base (11), four roll stands (13), two rolling rolls (14), a first lifting cylinder (15), a roll frame (16), several conveying rolls (17), and a second lifting cylinder (18), characterized in that: The base (11) is provided with a detection auxiliary mechanism (2); The detection auxiliary mechanism (2) includes a detection housing (21) with a hollow interior, an external air pipe (23), a sealing slide (24) disposed inside the detection housing (21), a detection component (25), and a jet pipe (28). The detection housing (21) is also provided with an adjustment component (29) for adjusting the jet pipe (28). A push arm (26) is provided between the detection component (25) and the sealing slide (24). The flange of the external air pipe (23) is installed on the outer wall of the detection housing (21). Air is supplied to the inside of the detection housing (21) through the external air pipe (23), so that a high pressure is formed inside the detection housing (21) to push the sealing slide (24), thereby driving the detection component (25) to move down and contact the steel plate. At the same time, the jet pipe (28) sprays out a high-pressure airflow to cool and dry the surface of the strip steel plate.

2. The special steel plate rolling equipment according to claim 1, characterized in that: The top side of the detection housing (21) is equipped with a mounting base (22) fixed to the side wall of the base (11). The detection component (25) includes a lifting plate (251), a guide roller (252), a hollow sleeve (253), a telescopic rod (254), a detection roller (255), a pressure sensor, and a detection component. The push arm (26) is hinged between the lifting plate (251) and the sealing slide (24), and the push arm (26) is inclined. A limit component (27) is provided between the lifting plate (251) and the detection housing (21), wherein the limit component (27) is composed of a telescopically connected limit block (271) and a limit rod (272).

3. The special steel plate rolling equipment according to claim 2, characterized in that: The detection housing (21) has a cavity (211) inside, in which a sealing slide (24) is slidably disposed in the cavity (211) and divides the cavity (211) into two parts, left and right. The detection component (25) and the adjustment component (29) are respectively located on the left and right sides of the cavity (211). A guide roller (252) is rotatably installed on one side of the lifting plate (251). The lifting plate (251) is located in front of the sealing slide (24). When the sealing slide (24) moves, the lifting plate (251) moves accordingly. At the same time, the guide roller (252) contacts the cavity (211) first and drives the lifting plate (251) to move down through the push arm (26).

4. The special steel plate rolling equipment according to claim 3, characterized in that: A reset spring (241) connected to the chamber (211) is installed on the outer wall of the sealing slide (24). The sleeve (253) is bolted to the bottom side of the lifting plate (251). The telescopic rod (254) slides through the sleeve (253) and the lifting plate (251), and the bottom end of the telescopic rod (254) extends to the bottom of the detection housing (21). The pressure sensing element consists of a pressure sensing seat (256) and a pressure spring (257). The pressure sensing seat (256) and the pressure spring (257) are both wound around the outer surface of the telescopic rod (254), and the bottom side of the pressure spring (257) is connected and fixed to the top side of the pressure sensing seat (256).

5. A special steel plate rolling equipment according to claim 4, characterized in that: The detection component includes a hollow rotating sleeve (258), a scale (259) fixed to the outer surface of the rotating sleeve (258), and an indicator rod (2510) fixed to the top side of the lifting plate (251). The indicator rod (2510) is located above the scale (259). The top end of the telescopic rod (254) extends into the interior of the rotating sleeve (258), and a guide wheel (2511) is installed at the top end of the telescopic rod (254). The rotating sleeve (258) has an opening inside the guide wheel. The guide groove (2512) of the wheel (2511) is rolled and engaged. The guide groove (2512) is composed of a straight groove and a spiral groove, which are distributed vertically and connected. When the telescopic rod (254) moves upward, the guide wheel (2511) rolls in the guide groove (2512). First, the guide wheel (2511) moves in the straight groove and enters the spiral groove according to the displacement amplitude, thereby driving the rotating sleeve (258) to rotate. The detection engagement is achieved through the scale (259) and the pressure sensor seat (256).

6. A special steel plate rolling equipment according to claim 2, characterized in that: The bottom end of the jet pipe (28) extends to the outside of the detection housing (21), and the adjustment assembly (29) is disposed outside the jet pipe (28) and is linked to the displacement of the sealing slide (24) and the pressure sensor; the adjustment assembly (29) includes a guide plate (291), a slider (292) sliding outside the guide plate (291), a wedge seat (294) disposed below the slider (292), a vertical plate (296) fixed to the bottom side of the slider (292), an abutment (297) sliding inside the vertical plate (296), and a squeezing wheel (298) mounted on the abutment (297); A wedge-shaped surface (295) with an interference fit is provided between the wedge-shaped seat (294) and the slider (292). The wedge-shaped seat (294) is fixed on the outer wall of the sealing slide (24). The inner side of the guide plate (291) is provided with a guide surface (293) that abuts against the abutting member (297). When the sealing slide (24) is displaced, the wedge-shaped seat (294) is displaced accordingly and drives the slider (292) to move upward through the wedge-shaped surface (295). The slider (292) drives the abutting member (297) to move upward and, guided by the guide surface (293), drives the abutting member (297) to squeeze the top side of the jet pipe (28) so that its top side becomes narrower.

7. A special steel plate rolling equipment according to claim 6, characterized in that: The limiting component (27) includes a concave abutment frame (2971), a telescopic shaft (2972) fixed to one side of the abutment frame (2971) and passing through the vertical plate (296), and a ball bearing (2973) rotatably mounted on the other end of the telescopic shaft (2972) and abutting against the guide surface (293). The extrusion wheel (298) is rotatably mounted on the inner side of the abutment frame (2971). A return spring (2974) is installed between the abutment frame (2971) and the vertical plate (296).

8. A special steel plate rolling equipment according to claim 6, characterized in that: The slider (292) has a limiting port (2910) inside that is sleeved on the outside of the guide plate (291), and a limiting protrusion (2911) is fixed on the inner side of the limiting port (2910). A limiting groove (2912) is provided on the side wall of the guide plate (291) to slide with the limiting protrusion (2911). There are multiple adjustment components (29), and the multiple adjustment components (29) are distributed in a ring. The multiple sliders (292) are bolted together with a limiting ring (299) sleeved on the outside of the jet pipe (28).

9. A special steel plate rolling equipment according to claim 1, characterized in that: The two rolling rolls (14) are distributed vertically, with their two ends respectively installed on opposite sides of the four roll seats (13). A drive structure (19) is provided on one of the upper roll seats (13). Two adjustment slides (12) are opened inside the machine base (11). The four roll seats (13) are slidably installed in the adjustment slides (12). A lifting cylinder one (15) for adjusting the two rolling rolls (14) is installed inside the machine base (11). A cylinder seat (181) is installed on the side wall of the machine base (11) outside the lifting cylinder two (18). The output end of the lifting cylinder two (18) is connected to the roll frame (16).

10. A special steel plate rolling process, employing a special steel plate rolling equipment as described in any one of claims 1-9, comprising the following steps: S1: Slab heating The special steel plate slab to be rolled is fed into a heating furnace for heating. The heating temperature is determined according to the steel grade and the target rolling thickness to ensure that the slab reaches a suitable rolling temperature and has sufficient plasticity and low deformation resistance in the subsequent rolling process. S2: Rough rolling The heated slab is fed into a roughing mill for multiple passes of roughing. During the roughing process, the reduction and rolling speed of each pass are controlled to initially roll the slab into an intermediate slab. The thickness of the intermediate slab after roughing is greater than the thickness of the target finished product. S3: Finish rolling The intermediate billet after rough rolling is fed into the finishing mill consisting of rolling unit (1) for finishing rolling; during the finishing rolling process: The lifting cylinder (15) drives the four roller seats (13) to slide within the adjusting slide (12), adjusting the size of the roller gap between the two rolling rollers (14) and controlling the amount of reduction in the finishing rolling. The drive structure (19) drives the rolling roll (14) to rotate, and performs multiple passes of fine rolling on the intermediate billet until the strip thickness reaches the target finished product thickness; The conveying roller (17) is lifted and lowered under the drive of the second lifting cylinder (18) to convey and guide the strip steel; S4: Online detection and drying After finishing, the strip passes under the inspection auxiliary mechanism (2), which simultaneously performs the following operations: The external air tube (23) inputs compressed gas into the detection housing (21), and the high pressure generated in the chamber (211) pushes the sealing slide (24) to slide. The sealing slide (24) drives the lifting plate (251) to move down through the push arm (26), so that the detection roller (255) contacts the surface of the strip steel; The detection roller (255) rolls with the movement of the strip, and the telescopic rod (254) slides in the sleeve (253) according to the change in strip thickness and vibration. The pressure sensor seat (256) detects the change in the compression of the pressure spring (257) and outputs a thickness detection signal; the guide wheel (2511) rolls in the guide groove (2512), and when the displacement amplitude of the telescopic rod (254) exceeds the preset threshold, the guide wheel (2511) enters the spiral groove to drive the rotating sleeve (258) to rotate, and the scale (259) and the indicator rod (2510) cooperate to output a large displacement detection signal; At the same time, the jet pipe (28) sprays out high-pressure and high-speed airflow to dry the surface of the strip steel; When the thickness of the strip increases or the vibration intensifies, the displacement of the sealing slide (24) increases, the top of the jet pipe (28) narrows further, the airflow speed increases, the pneumatic pressure is enhanced, and the auxiliary detection roller (255) fits more tightly against the surface of the strip. S5: Winding After inspection and drying, the finished steel strip is fed into a coiler for winding to form a steel coil.

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