A servo pressure load balancing and energy-saving control system for a rolling mill and hydraulic pump

Abstract

This invention relates to the field of steel rolling technology and discloses a steel rolling mill unit and a hydraulic pump servo pressure load balancing and energy-saving control system. The system includes a base with two symmetrically arranged machine bases mounted on its top surface. The opposing surfaces of the two machine bases have through grooves containing a first roll assembly and a second roll assembly for rolling steel plates. A first lifting mechanism is mounted on the bottom surface of the through grooves, with the first roll assembly mounted at its output end. Two symmetrically arranged first guide rails are mounted on the sides of the through grooves, with a first slide block slidably connected to each guide rail. The second roll assembly is mounted on the first slide block and is driven to rise and fall by the second lifting mechanism. Two symmetrically arranged water spray mechanisms are mounted on the sides of the machine bases. An air jet mechanism is also mounted on the machine bases. This unit has a stable structure, high roll adjustment precision, and can comprehensively clean iron oxide scale and effectively inhibit secondary oxidation, significantly improving the surface quality of rolled steel plates and the stability of production operation.

Description

Technical Field

[0001] This invention relates to the field of steel rolling technology, and in particular to a steel rolling mill unit and a hydraulic pump servo pressure load balancing and energy-saving control system. Background Technology

[0002] In hot-rolled steel plate production, iron oxide scale indentation is a core common defect restricting product surface quality. It is divided into two categories: primary iron oxide scale indentation generated in the heating furnace and secondary iron oxide scale indentation regenerated during the rolling process. In existing technologies, primary iron oxide scale is thick and has a significant color difference from the substrate. It can be effectively controlled by visually identifying descaling abnormalities online, combined with molten salt blasting and high-pressure water descaling between stands. The process intervention difficulty is low.

[0003] However, there are insurmountable technical bottlenecks in the management of secondary iron oxide scale: this type of iron oxide scale is generated throughout the rolling process, is extremely thin, and can be quickly regenerated after descaling. It has no obvious temperature difference with the high-temperature substrate and no visible color difference, making it impossible to identify its adhesion status online. The pitting defect can only be detected after the finished product leaves the line, at which point irreversible quality loss has already occurred and cannot be remedied by subsequent processes, becoming the core pain point in the surface quality control of hot-rolled strip. Summary of the Invention

[0004] The purpose of this invention is to provide a servo pressure load balancing and energy-saving control system for a rolling mill and hydraulic pump, which solves the problem of incomplete removal of secondary iron oxide scale during the rolling process mentioned in the background art.

[0005] The technical solution adopted in this invention is as follows: A steel rolling mill includes a base, on the top surface of which two symmetrically arranged machine bases are installed. The opposite surfaces of the two machine bases have through grooves, and a first roll assembly and a second roll assembly for rolling steel plates are provided in the through grooves. Two symmetrically arranged support beams are installed on the upper side wall of the machine bases. A first lifting mechanism is installed on the bottom surface of the through grooves, and the first roll assembly is installed at the output end of the first lifting mechanism. Two symmetrically arranged first guide rails are installed on the side of the through grooves, and a first slide block is slidably connected to the first guide rail. The second roll assembly is installed on the first slide block, and the second roll assembly is driven to lift and lower by the second lifting mechanism. Two symmetrically arranged water spraying mechanisms are installed on the side of the machine bases, and the water spraying mechanisms are used to clean the secondary iron oxide scale on the upper and lower surfaces of the steel plate. An air jetting mechanism is installed on the machine base, and the air jetting mechanism is used to spray nitrogen gas to blow on the steel plate after the iron oxide scale has been removed, forming a protective gas layer around the steel plate to inhibit the oxidation reaction.

[0006] The first roll assembly includes a first support seat connected to a top plate, a first bearing seat mounted on the first support seat, a first ball bearing mounted on the first bearing seat, a first toothed groove on the inner wall of the first ball bearing, a first rotating shaft connected to the first ball bearing, a second toothed groove on the outer wall of the first rotating shaft adapted to the first toothed groove, a first roll body mounted on the shaft ends of the two first rotating shafts, and a rib plate connected at the junction of the first roll body and the first rotating shaft.

[0007] The second roll assembly includes a second support seat connected to the first slide, a second bearing seat mounted on the second support seat, a first ball bearing mounted on the second bearing seat, the inner wall of the first ball bearing having a first tooth groove, a second rotating shaft connected to the first ball bearing, the outer wall of the second rotating shaft having a second tooth groove adapted to the first tooth groove, a second roll body mounted on the shaft ends of the two second rotating shafts, and a rib plate connected at the junction of the second roll body and the second rotating shaft.

[0008] The adjusting seat includes a second rod seat, a third rod seat connected to the second rod seat by screws, a support rod fixed between the second rod seat and the third rod seat, a fourth rod seat connected to the third rod seat by screws, and a first nozzle fixed between the fourth rod seat and the third rod seat.

[0009] The top surface of the third guide seat is connected to the second base plate. Two symmetrically arranged first rod seats are installed on the second base plate. A support rod is fixed on the first rod seat by a buckle plate. An adjustment seat is installed on the support rod. A second nozzle for cleaning secondary iron oxide scale on the side of the steel plate is installed on the adjustment seat.

[0010] Two symmetrically arranged wiper assemblies are connected to the base. Each wiper assembly includes a third hinge seat and a fourth hinge seat. An eighth link is hinged to the third and fourth hinge seats. The hinge point is located in the middle of the eighth link. A scraper is connected to the head end of the eighth link. The scraper consists of a vertical section and an arc section. A scraper strip adapted to the roller body is connected to the top surface of the arc section of the scraper. A fourth spring is connected to the tail end of the eighth link. The fourth spring enables the eighth link on the upper and lower sides to adaptively conform to the corresponding roller body.

[0011] A cover is connected to the base. The side wall of the cover has an inlet and an outlet. A steam exhaust pipe is connected to the top surface of the cover. A first material collection trough is installed on the bottom surface of the cover. A first auger is installed inside the first material collection trough.

[0012] A second collection trough is installed on the cover, and a fourth rotating shaft is rotatably connected to the cover. The fourth rotating shaft is driven by a third motor. A third roller is connected to the fourth rotating shaft, and a magnetic plate with a semi-circular cross-section is connected to the side wall of the fourth rotating shaft. The magnetic plate is located inside the third roller. A baffle plate with a triangular cross-section is connected to the horizontal section of the first collection trough. The baffle plate is used to scrape off the secondary iron oxide scale adsorbed on the surface of the third roller. A second auger is installed in the second collection trough. The second auger is used to transport the secondary iron oxide scale into the first collection trough.

[0013] The water spraying mechanism includes a first support base connected to the base, a fifth guide rail connected to the first support base, a fifth slide block slidably connected to the fifth guide rail, a first carrier plate connected to the fifth slide block, a second telescopic rod connected to the first support base, and the free end of the second telescopic rod connected to the first carrier plate.

[0014] The first nozzle and the second nozzle include an outer tube with a constricted middle section. An air supply pipe is connected to the side wall of the outer tube, and an inner tube is connected to the air supply pipe inside the outer tube. The outlet of the inner tube is conical.

[0015] The beneficial effects of this invention are as follows: This rolling mill unit strengthens the overall structural stability of the machine base through support beams, and the dual lifting mechanism enables high-precision and flexible adjustment of the roll spacing, ensuring the rolling accuracy and operational stability of the steel plate; the water spraying mechanism, combined with the multi-directional brush assembly, achieves comprehensive and thorough cleaning of secondary iron oxide scale on the surface and sides of the steel plate, while the air jet mechanism sprays nitrogen to form a protective atmosphere, and the roller scraping assembly significantly inhibits the oxidation reaction of the steel plate and reduces the generation of secondary iron oxide scale; the magnetic adsorption collection structure, combined with the auger, achieves full collection and recovery of iron oxide scale, resulting in a compact unit structure and stable operation, effectively improving the surface quality and production efficiency of rolled steel plates, and reducing the difficulty of equipment maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main view structure of this application.

[0017] Figure 2 This is a three-dimensional structural diagram of this application.

[0018] Figure 3 This is a side view sectional structural diagram of this application.

[0019] Figure 4 This is a three-dimensional structural diagram of the first lifting mechanism.

[0020] Figure 5 This is a three-dimensional structural diagram of the first roll assembly.

[0021] Figure 6 This is a schematic diagram of the front cross-sectional structure of the first rotating shaft.

[0022] Figure 7 This is a three-dimensional structural diagram of the second roll assembly.

[0023] Figure 8 This is a schematic diagram of the front cross-sectional structure of the second lifting mechanism.

[0024] Figure 9 This is a top-view cross-sectional structural diagram of the second lifting mechanism.

[0025] Figure 10This is a three-dimensional structural diagram of the water spray mechanism.

[0026] Figure 11 This is a three-dimensional structural diagram of the adjustment seat.

[0027] Figure 12 This is a side view sectional diagram of the jet mechanism.

[0028] Figure 13 This is a three-dimensional structural diagram of the jet mechanism.

[0029] Figure 14 This is a schematic diagram of the front cross-sectional structure of the jet mechanism.

[0030] Figure 15 This is a schematic diagram of the three-dimensional structure of the slide bar.

[0031] Figure 16 This is a top-view cross-sectional structural diagram of the slide bar.

[0032] Figure 17 This is a schematic diagram of the front cross-sectional structure of the rotary joint.

[0033] Figure 18 This is a schematic diagram of the three-dimensional structure of the first bristle.

[0034] Figure 19 This is a side view cross-sectional diagram of the first bristle.

[0035] Figure 20 This is a schematic diagram of the three-dimensional structure of the second guide seat.

[0036] Figure 21 This is a schematic diagram of the three-dimensional structure of the second bristle.

[0037] Figure 22 This is a schematic diagram of the front cross-sectional structure of the second bristle.

[0038] Figure 23 This is a schematic diagram of the three-dimensional structure of the second nozzle.

[0039] Figure 24 This is a three-dimensional structural diagram of the first and second bristles.

[0040] Figure 25 This is a side view of the wiper assembly.

[0041] Figure 26 This is a three-dimensional structural diagram of the wiper assembly.

[0042] Figure 27 This is a side view cross-sectional diagram of the wiper assembly.

[0043] Figure 28 This is a side view cross-sectional structural diagram of the cover.

[0044] Figure 29 This is a three-dimensional structural diagram of the first auger.

[0045] Figure 30 This is a top view of the second screw conveyor.

[0046] Figure 31 This is a top view of the fifth guide rail.

[0047] Figure 32 This is a schematic diagram of the front view cross-sectional structure of the outer and inner tubes.

[0048] Figure 33 This is the system schematic diagram.

[0049] Figure 34 This is a schematic diagram of the system's three-dimensional structure.

[0050] In the diagram: 1. Base; 2. Machine base; 3. Support beam; 4. Through groove; 5. First lifting mechanism; 6. First roll assembly; 7. First guide rail; 8. First slide; 9. Second roll assembly; 10. Second lifting mechanism; 11. Steel plate; 12. Water spraying mechanism; 13. Air spraying mechanism; 14. Base plate; 15. First vertical plate; 16. Second vertical plate; 17. Second guide rail; 18. Second slide; 19. First wedge seat; 20. Top plate; 21. Third guide rail; 22. Third slide; 23. Second wedge seat; 24. First telescopic rod; 25. First bearing seat; 26. First bearing seat; 27. First ball bearing; 28. First tooth groove; 29. ​​First rotating shaft; 30. Second tooth groove; 31. First roll body; 32. Rib plate 33. Second bearing seat; 34. Second bearing seat; 35. Second ball bearing; 36. Second rotating shaft; 37. Second roller body; 38. First housing; 39. First worm gear; 40. First lead screw; 41. First worm; 42. Variable hydraulic pump; 43. First support seat; 44. First carrier plate; 45. First hinge seat; 46. First connecting rod; 47. Third bearing seat; 48. Third bearing seat; 49. Second lead screw; 50. Worm gear mechanism; 51. Fourth guide rail; 52. Fourth slide; 53. Moving seat; 54. Second hinge seat; 55. Second connecting rod; 56. Second carrier plate; 57. First rod seat; 58. Buckle plate; 59. Support rod; 60. Adjusting seat; 61. First nozzle; 62. Main water pipe; 63. 64. Screw; 65. Third rod seat; 66. Fourth rod seat; 67. Fourth bearing seat; 68. Slide tube; 69. Guide groove; 70. Air nozzle; 71. Rotary joint; 72. Second housing; 73. Fifth bearing seat; 74. Second worm gear; 75. First cam; 76. Third connecting rod; 77. Second worm gear; 78. First motor; 79. Slide rod; 80. First guide rod; 81. First guide seat; 82. First annular groove; 83. Sixth bearing seat; 84. Fourth connecting rod; 85. First short shaft; 86. Roller; 87. Rotary tube; 88. Sealed bearing; 89. Fixed tube; 90. Second annular groove; 91. Airflow channel; 92. Sealing ring; 93. Pipe joint; 94. Motor mounting base; 95. Second motor 96. First coupling; 97. Reduction gearbox; 98. Chassis; 99. Drive gear; 100. Driven gear; 101. Second coupling; 102. First universal joint drive shaft; 103. Second universal joint drive shaft; 104. Slide groove; 105. Slide plate; 106. First cover plate; 107. Sliding hole; 108. First bristle; 109. First spring; 110. Second guide rod; 111. Second guide seat; 112. Second spring; 113. Seventh bearing seat; 114. Third rotating shaft; 115. Second short shaft; 116. Fifth connecting rod; 117. Sixth connecting rod; 118. Third short shaft; 119. Adjusting rod; 120. Seventh connecting rod; 121. Third guide seat; 122. Third guide rod; 123. First base plate;124. Second cover plate; 125. Second brush bristles; 126. Third spring; 127. Lead screw; 128. Second base plate; 129. Second nozzle; 130. Squeegee assembly; 131. Third hinge seat; 132. Fourth hinge seat; 133. Eighth connecting rod; 134. Squeegee; 135. Vertical section; 136. Arc-shaped section; 137. Squeegee blade; 138. Fourth spring; 139. Cover; 140. Inlet; 141. Outlet; 142. Steam exhaust pipe; 143. First collection trough; 144. 145. First auger; 146. Second collection trough; 147. Fourth rotating shaft; 148. Third motor; 149. Third roller; 150. Magnetic plate; 151. Baffle plate; 152. Second auger; 153. Fifth guide rail; 154. Fifth slide; 155. Second telescopic rod; 156. Outer tube; 157. Narrowing structure; 158. Air supply pipe; 159. Inner tube; 160. Fourth motor; 161. Valve block; 162. DRG pressure reducing valve assembly; 163. Cartridge-type directional valve; 164. Load balancing valve. Detailed Implementation

[0051] The embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] Furthermore, the terms “first,” “second,” “third,” “fourth,” “fifth,” “sixth,” “seventh,” “eighth,” “ninth,” and “tenth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] like Figure 1-3 As shown in Embodiment 1, a rolling mill unit includes a base 1. Two symmetrically arranged machine bases 2 are mounted on the top surface of the base 1. Two symmetrically arranged support beams 3 are mounted on the upper sidewalls of the machine bases 2, forming a stable structure with the two machine bases 2. The opposing surfaces of the two machine bases 2 have rectangular through grooves 4. A first lifting mechanism 5 is mounted on the bottom surface of the through grooves 4. A first roll assembly 6 is mounted on the first lifting mechanism 5. Two symmetrically arranged first guide rails 7 are mounted on the sides of the through grooves 4. A first slide block 8 is slidably connected to the first guide rails 7, and a roll assembly 6 is mounted on the first slide block 8. The second roll assembly 9 is driven by the second lifting mechanism 10; the first roll assembly 6 and the second roll assembly 9 are used to roll the steel plate 11; two symmetrically arranged water spraying mechanisms 12 are installed on the side of the machine base 2, which are used to clean the secondary iron oxide scale on the upper and lower surfaces of the steel plate 11; the machine base 2 is equipped with an air spraying mechanism 13, which sprays nitrogen gas to blow the steel plate 11 after the iron oxide scale has been removed, forming a protective gas layer around the steel plate 11, which can further inhibit the oxidation reaction and reduce the amount of secondary iron oxide scale generated. Technical problem: The existing rolling mill machine base 2 has insufficient stability and poor flexibility in adjusting the roll spacing, resulting in incomplete cleaning of secondary iron oxide scale and ineffective suppression of the oxidation reaction during the rolling of the steel plate 11, affecting the rolling quality and surface accuracy of the steel plate 11. Movement Process: The first lifting mechanism 5 drives the first roll assembly 6 to rise and fall, and the second lifting mechanism 10 drives the first slide block 8 to slide along the first guide rail 7, driving the second roll assembly 9 to rise and fall. The distance between the two roll assemblies is adjusted to complete the rolling of the steel plate 11. During the rolling process, the upper and lower symmetrical water spraying mechanisms 12 clean the secondary iron oxide scale on the surface of the steel plate 11, and the air spraying mechanism 13 sprays nitrogen gas to form a protective gas layer around the steel plate 11. Beneficial Effects: The support beam 3 improves the structural stability and load-bearing capacity of the unit; the dual lifting mechanism enables flexible adjustment of the roll spacing to adapt to the rolling of steel plates 11 of different thicknesses; the water spraying mechanism 12 cleans the iron oxide scale in advance to prevent it from being pressed into the steel plate 11 and affecting the surface quality; the air spraying mechanism 13 forms a nitrogen protective layer to inhibit the oxidation of the steel plate 11, significantly reduce the amount of secondary iron oxide scale generated, and improve the quality of the finished steel plate 11.

[0056] like Figure 4As shown, as an optimization of Embodiment 1, the first lifting mechanism 5 includes a base plate 14 connected to the base 2. Two symmetrically arranged first vertical plates 15 and second vertical plates 16 are mounted on the base plate 14. Two symmetrically arranged second guide rails 17 are slidably connected to the first vertical plates 15. A second slide block 18 is slidably connected to the second guide rails 17. A first wedge-shaped seat 19 is connected to the second slide block 18. A top plate 20 is connected to the top surface of the first wedge-shaped seat 19. The top plate 20 is used to install the first roll assembly 6. Two symmetrically arranged third guide rails 21 are mounted on the top surface of the base plate 14. A third slide block 22 is slidably connected to the third guide rails 21. A second wedge-shaped seat 23 is mounted on the third slide block 22. The second wedge-shaped seat 23 is used to push the first wedge-shaped seat 19 to move up and down. The second wedge-shaped seat 23 is driven by a first telescopic rod 24, which is located on the second vertical plate 16. Technical Problem: Existing roll lifting mechanisms suffer from low lifting accuracy and weak load-bearing capacity. They are prone to jamming and shifting during lifting, failing to stably support the roll assembly and affecting rolling stability and accuracy. Movement Process: The first telescopic rod 24 extends and retracts, driving the third slide 22 to move horizontally along the third guide rail 21, simultaneously moving the second wedge seat 23. The second wedge seat 23 pushes the first wedge seat 19 through its wedge surface, causing the second slide 18 to rise and fall vertically along the second guide rail 17, thereby adjusting the height of the first roll assembly 6 via the top plate 20. Beneficial Effects: The double wedge seats work together to convert horizontal driving force into vertical lifting force, significantly improving the mechanism's load-bearing capacity and impact resistance, making it suitable for heavy-duty rolling conditions. The guide rail and slide work together to ensure the straightness and accuracy of lifting, avoiding shifting and jamming, improving the precision and stability of the first roll assembly 6 height adjustment, and ensuring the rolling accuracy of the steel plate 11.

[0057] like Figure 5 and 6 As shown, as an optimization of Embodiment 1, the first roll assembly 6 includes a first support seat 25 connected to the top plate 20. A first bearing seat 26 is mounted on the first support seat 25, and a first ball bearing 27 is mounted on the first bearing seat 26. The inner wall of the first ball bearing 27 has a first toothed groove 28. A first rotating shaft 29 is connected to the first ball bearing 27. The outer wall of the first rotating shaft 29 has a second toothed groove 30, which is adapted to the first toothed groove 28 to ensure stable rotation during the rolling process. A first roll body 31 is mounted on the shaft ends of the two first rotating shafts 29, and a rib plate 32 is connected at the junction of the first roll body 31 and the first rotating shaft 29. Technical problem: In existing roll assemblies, the rotating shaft and bearing are prone to slippage, resulting in poor rolling rotation stability. The connection strength between the roll body and the rotating shaft is insufficient, making it prone to deformation and breakage, which affects the continuity and safety of the rolling operation. Beneficial effects: The meshing of the tooth grooves eliminates the relative sliding and slippage between the shaft and the bearing, greatly improving the synchronicity and stability of the shaft rotation and ensuring the efficiency of rolling power transmission; Ribs 32 strengthen the connection strength between the roll body and the shaft, improve the roll body's resistance to deformation and fracture, extend the service life of the components, and ensure the continuous and stable operation of the rolling process.

[0058] like Figure 7 As shown, as an optimization of Embodiment 1, the second roll assembly 9 includes a second bearing seat 33 connected to the first slide 8. A second bearing seat 34 is mounted on the second bearing seat 33, and a first ball bearing 27 is mounted on the second bearing seat 34. The inner wall of the first ball bearing 27 has a first toothed groove 28. A second rotating shaft 36 is connected to the first ball bearing 27, and the outer wall of the second rotating shaft 36 has a second toothed groove 30. The second toothed groove 30 is adapted to the first toothed groove 28 to ensure stable rotation during the rolling process. Second roll bodies 37 are mounted on the shaft ends of the two second rotating shafts 36, and ribs 32 are connected at the junction of the second roll body 37 and the second rotating shaft 36. Technical problem: In the existing upper roll assembly, the rotating shaft and bearing are prone to slippage, resulting in poor rolling rotation stability. The connection strength between the roll body and the rotating shaft is insufficient, leading to poor rolling stability after lifting and adjusting, which affects the rolling quality of the steel plate 11. Beneficial effects: The meshing of the tooth grooves eliminates the relative sliding and slippage between the shaft and the bearing, greatly improving the synchronization and stability of the shaft rotation after lifting and adjusting, and ensuring the efficiency of rolling power transmission; the rib plate 32 strengthens the strength of the roll body structure, extends the service life of the component, and works with the first roll assembly 6 to ensure the accuracy and stability of rolling the steel plate 11.

[0059] like Figure 8 and 9 As shown, as an optimization of Embodiment 1, the second lifting mechanism 10 includes a first housing 38 connected to the base 2. A second ball bearing 35 is installed inside the first housing 38. A first worm gear 39 is installed on the second ball bearing 35. A first lead screw 40 is threadedly connected to the center of the first worm gear 39. The lower end of the first lead screw 40 is connected to the second bearing seat 33. A first worm 41 meshes with the first worm gear 39. The first worm 41 is driven by a variable hydraulic pump 42. Technical problem: The existing upper roll lifting mechanism has low adjustment accuracy and poor self-locking performance. Under heavy load conditions, it is prone to sliding displacement, making it impossible to achieve precise fine adjustment of the roll spacing, which affects the control accuracy of the rolling thickness of the steel plate 11. Movement process: The variable hydraulic pump 42 drives the first worm 41 to rotate, which drives the meshing first worm gear 39 to rotate. The first worm gear 39 drives the first lead screw 40 to rise and fall vertically through thread transmission, thereby driving the second bearing seat 33 and the second roll assembly 9 to rise and fall, and precisely control the roll spacing. Beneficial effects: The worm gear and screw drive work together to achieve high-precision lifting and lowering of the second roll assembly 9 and precise fine-tuning of the roll spacing, improving the control accuracy of the rolling thickness of the steel plate 11; the self-locking performance of the worm gear prevents the roll assembly from sliding under heavy load, ensuring the spacing is stable during the rolling process and improving the consistency of the rolling quality of the steel plate 11; the variable hydraulic pump 42 can flexibly adjust the lifting speed to adapt to different working conditions.

[0060] like Figure 10As shown, as an optimization of Embodiment 1, the water spraying mechanism 12 includes a first support base 43 connected to the base 2, a first carrier plate 44 connected between the two first support bases 43, two symmetrically arranged first hinge seats 45 mounted on the first carrier plate 44, and a first connecting rod 46 hinged to the first hinge seat 45; two symmetrically arranged third bearing seats 47 mounted on the first carrier plate 44, a third bearing seat 48 mounted on the third bearing seat 47, a second lead screw 49 rotatably connected to the third bearing seat 48, the second lead screw 49 being driven by a worm gear mechanism 50, a fourth guide rail 51 mounted on the third bearing seat 47, and a fourth slide block 52 slidably connected to the fourth guide rail 51. A movable seat 53 is connected to the slide 52, and the movable seat 53 is threadedly connected to the second lead screw 49. A second hinge seat 54 is connected to the fourth slide 52, and a second connecting rod 55 is hinged to the second hinge seat 54. The free end of the first connecting rod 46 is hinged to the middle of the second connecting rod 55. A second carrier plate 56 is hinged to the free end of the second connecting rod 55. Two symmetrically arranged first rod seats 57 are installed on the second carrier plate 56. A support rod 59 is fixed to the first rod seat 57 by a buckle plate 58. An adjusting seat 60 is installed on the support rod 59. A first nozzle 61 is installed on the adjusting seat 60. The first nozzle 61 is supplied with water through the main water pipe 62. The first nozzle 61 is used to clean the secondary iron oxide scale on the upper and lower surfaces of the steel plate 11. Technical problem: The existing water spray mechanism 12 for steel rolling has poor flexibility in adjusting the nozzle angle and position, making it impossible to accurately control the high-pressure water spray parameters. The iron oxide scale is not thoroughly cleaned, affecting the subsequent rolling quality of the steel plate 11. Movement Process: The worm gear mechanism 50 drives the second lead screw 49 to rotate, causing the fourth slide 52 to move horizontally along the fourth guide rail 51. Through the double-link hinge mechanism, the second carrier plate 56 is adjusted in position and angle, thus adjusting the spray parameters of the first nozzle 61. The main water pipe 62 supplies water to the first nozzle 61, which sprays high-pressure water to clean the secondary iron oxide scale on the surface of the steel plate 11. The adjusting seat 60 allows for secondary fine-tuning of the nozzle angle. Beneficial Effects: The lead screw drive and double-link mechanism enable a wide range of flexible adjustments to the nozzle's spray position and angle, adapting to the cleaning needs of the steel plate 11 under different working conditions. The lead screw drive ensures adjustment accuracy, precisely controlling the spray parameters and significantly improving the iron oxide scale cleaning effect. The mounting plate 58 and adjusting seat 60 enable quick nozzle installation and fine-tuning, improving the convenience of equipment assembly and debugging.

[0061] like Figure 11As shown, as an optimization of Embodiment 1, the adjusting seat 60 includes a second rod seat 63, which is connected to a third rod seat 65 via screws 64. A support rod 59 is fixed between the second rod seat 63 and the third rod seat 65. A fourth rod seat 66 is connected to the third rod seat 65 via screws 64, and a first nozzle 61 is fixed between the fourth rod seat 66 and the third rod seat 65. Technical problem: The existing nozzle adjusting seat 60 has poor adjustment flexibility, is inconvenient to install and disassemble, and cannot achieve rapid fine-tuning and stable fixing of the nozzle angle. During high-pressure spraying, the nozzle is prone to loosening and displacement, affecting the iron oxide scale cleaning effect. Beneficial effects: The multi-segment rod seat and screws 64 cooperate to achieve multi-dimensional rapid fine-tuning of the nozzle position and angle, adapting to different spraying cleaning needs; the screws 64 lock in place to ensure the stability of the nozzle installation, preventing loosening and displacement during high-pressure spraying, and ensuring stable cleaning effect; the structure is simple, installation and disassembly are convenient, and nozzle maintenance, replacement, and debugging are easy.

[0062] like Figure 12-16As shown, as an optimization of Embodiment 1, the number of jet mechanisms 13 is four, with two groups of jet mechanisms 13 located on the inlet and outlet sides of the steel plate 11, respectively. The jet mechanisms 13 in the same group are located on the upper and lower sides of the steel plate 11. Each jet mechanism 13 includes a fourth bearing seat 67 connected to the base 2. A slide tube 68 is mounted on the fourth bearing seat 67, and the inner wall of the slide tube 68 has a guide groove 69. A spirally arranged air nozzle 70 is mounted on the side wall of the slide tube 68, and a rotary joint 71 is mounted on one end of the slide tube 68. A second housing 72 is mounted on the base 2, and a fifth bearing seat 73 is mounted inside the second housing 72. A second worm gear 74 is mounted on the fifth bearing seat 73, and a first cam 75 is connected to the shaft end of the second worm gear 74. A third connecting rod 76 is rotatably connected to the first cam 75. A second worm 77 meshes with the second worm gear 74. The second worm gear 77 is driven by the first motor 78. The shaft end of the second worm gear 77 is connected to a slide rod 79. The left side wall of the slide rod 79 is located inside the slide tube 68, and the setting of the slide rod 79 does not affect the nitrogen gas from the nozzle 70. The side wall of the slide rod 79 has a first guide rod 80, which is slidably adapted to the guide groove 69. The end of the slide tube 68 located inside the second housing 72 is connected to a first guide seat 81, and the side wall of the first guide seat 81 has a first annular groove 82. A sixth bearing seat 83 is installed inside the second housing 72. A fourth connecting rod 84 is hinged to the sixth bearing seat 83. The free end of the third connecting rod 76 is hinged to the middle of the fourth connecting rod 84. The free end of the fourth connecting rod 84 is connected to a first short shaft 85. A roller 86 is rotatably connected to the first short shaft 85. The roller 86 is adapted to the first annular groove 82. The first motor 78 drives the slide tube 68 to rotate and slide. Technical Problems: The existing jetting mechanism 13 for steel rolling has a limited jetting range and poor jetting uniformity, failing to form a stable protective layer on the surface of the steel plate 11, resulting in poor oxidation inhibition and weak adaptability to operating conditions. Motion Process: The first motor 78 drives the second worm gear 77 to rotate, which in turn drives the second worm wheel 74 to rotate. On one hand, the second worm gear 77 drives the slide tube 68 to rotate synchronously via the slide rod 79; on the other hand, the second worm wheel 74 drives the slide tube 68 to slide axially back and forth via the cam linkage mechanism, achieving simultaneous rotation and reciprocating movement of the slide tube 68. The rotary joint 71 continuously supplies gas to the slide tube 68, and nitrogen gas is ejected through the spirally arranged nozzles 70, forming a protective gas layer on the surface of the steel plate 11. Beneficial effects: The rotation and reciprocating sliding of the slide tube 68 are combined to achieve uniform nitrogen injection over a wide range, forming a stable and continuous protective layer on the surface of the steel plate 11, which greatly improves the oxidation inhibition effect; the single-power synchronous drive with dual action is compact in structure and has high transmission stability; the jetting mechanism 13 is provided on both the inlet and outlet sides of the steel plate 11, which inhibits the oxidation of the steel plate 11 in all directions before and after rolling, adapts to the protection requirements of steel plates 11 of different thicknesses, and improves the surface quality of the finished steel plate 11.

[0063] like Figure 17As shown, as an optimization of Embodiment 1, the rotary joint 71 includes a rotary tube 87 connected to the slide tube 68, a sealed bearing 88 rotatably connected to the rotary tube 87, and a fixed tube 89 rotatably connected to the rotary tube 87. The side wall of the fixed tube 89 has a second annular groove 90, and the second annular groove 90 has an airflow channel 91 communicating with the slide tube 68. A sealing ring 92 is installed on the outer wall of the fixed tube 89, and the sealing ring 92 is located on both sides of the second annular groove 90. A pipe joint 93 is connected to the side wall of the rotary tube 87, and the pipe joint 93 is opposite to the second annular groove 90. Technical problem: The existing rotary joint 71 has poor sealing performance, is prone to nitrogen leakage during rotation, has poor airflow delivery stability, cannot adapt to the gas supply requirements of rotating and reciprocating sliding pipelines, and affects the nitrogen protection effect. Beneficial effects: The second annular groove 90 works in conjunction with the airflow channel 91 to achieve continuous and stable nitrogen delivery in the rotating state, which is suitable for the gas supply requirements of the sliding tube 68 rotating and reciprocating; the double sealing ring 92 structure greatly improves the sealing performance of the joint, avoids nitrogen leakage, and ensures stable gas supply pressure and injection effect; the structure is compact, rotates smoothly, and has a long service life, which can be adapted to high-pressure gas delivery conditions.

[0064] like Figure 1 and 2 As shown, as an optimization of Embodiment 1, a motor mounting base 94 is installed on the top surface of the base 1, and a second motor 95 is installed on the motor mounting base 94. The second motor 95 is connected to a reduction gearbox 97 through a first coupling 96. A housing 98 is connected to the top surface of the base 1. A meshing drive gear 99 and a driven gear 100 are rotatably connected inside the housing 98. The drive gear 99 is connected to the reduction gearbox 97 through a second coupling 101. The drive gear 99 is connected to the first roll assembly 6 (first rotating shaft 29) through a first universal drive shaft 102, and the driven gear 100 is connected to the second roll assembly 9 (second rotating shaft 36) through a second universal drive shaft 103. Technical problem: The existing rolling mill has poor synchronization of the upper and lower rolls and low power transmission efficiency, which cannot adapt to the stable power transmission after the roll lifting and lowering adjustment, and is prone to speed difference, affecting the rolling quality and accuracy of the steel plate 11. Motion Process: The second motor 95 outputs power, which is reduced in speed and increased in torque by the reduction gearbox 97. This power drives the meshing drive gear 99 and driven gear 100 to rotate synchronously in opposite directions. The two gears then drive the upper and lower rolls to rotate synchronously in opposite directions via universal joint drive shafts to complete the rolling process. The universal joint drive shafts are adapted to the power transmission requirements after the rolls are raised or lowered. Beneficial Effects: The gear meshing transmission ensures synchronous opposite rotation of the upper and lower rolls, eliminating speed differences and significantly improving the rolling stability and accuracy of the steel plate 11. The universal joint drive shafts are adapted to the positional changes of the rolls after raising or lowering, ensuring continuous and stable power transmission after raising or lowering, and improving the adaptability of the unit to different operating conditions. The reduction gearbox 97 reduces speed and increases torque, increasing the rolling driving force of the rolls, adapting to the heavy-load rolling requirements of thick steel plates 11, and improving the rolling capacity of the unit.

[0065] like Figure 18-20As shown, as an optimization of Embodiment 1, the second carrier plate 56 has a groove 104, a slide plate 105 is slidably connected in the groove 104, a first cover plate 106 is connected to the top surface of the slide plate 105, the first cover plate 106 has evenly arranged sliding holes 107, a first bristle 108 is slidably connected in the sliding holes 107, the first bristle 108 has a T-shaped cross-section, a first spring 109 is connected to the bottom surface of the first bristle 108, the first bristle 108 is used to clean the upper and lower surfaces of the steel plate 11 after high-pressure water cleaning; a second guide rod 110 is connected to the side wall of the slide plate 105, a second guide seat 111 is slidably connected to the second guide rod 110, the second guide seat 111 is connected to the second carrier plate 56, a second spring 112 is sleeved on the side wall of the second guide rod 110, the second spring 112 is elastically connected. Between the second guide seat 111 and the slide plate 105; a seventh bearing seat 113 is connected to the second guide seat 111, and a third rotating shaft 114 is rotatably connected to the seventh bearing seat 113. The third rotating shaft 114 is driven by a fourth motor 159; a second short shaft 115 is connected to the axis of the third rotating shaft 114, and a fifth connecting rod 116 is connected to the side wall of the third rotating shaft 114. The free end of the fifth connecting rod 116 is hinged to a sixth connecting rod 117, and the free end of the sixth connecting rod 117 is rotatably connected to a third short shaft 118. An adjusting rod 119 is threadedly connected to the side wall of the third short shaft 118 and the second short shaft 115. The adjusting rod 119 is used to control the extension and retraction of the slide plate 105; a seventh connecting rod 120 is rotatably connected to the side wall of the third short shaft 118, and the free end of the seventh connecting rod 120 is hinged to one of the second guide rods 110. Technical Problem: After high-pressure water cleaning, the surface of the existing steel plate 11 still has trace amounts of iron oxide scale residue. The brush bristles cannot adaptively conform to the surface of the steel plate 11, resulting in rapid wear, rapid decline in cleaning effectiveness, and inaccurate adjustment of the bristle extension / retraction. Motion Process: The rotation of the third rotating shaft 114 drives the sliding plate 105 to reciprocate and extend via a multi-link mechanism, achieving reciprocating sweeping cleaning of the first brush bristles 108. The first brush bristles 108 elastically extend and retract via the first spring 109, adaptively conforming to the surface of the steel plate 11 to clean residual iron oxide scale. Rotating the adjusting rod 119 adjusts the stroke of the linkage mechanism, thereby adjusting the extension / retraction of the sliding plate 105 to adapt to the cleaning needs of steel plates 11 of different widths. The second spring 112 provides cushioning and restoring force for the sliding motion. Beneficial effects: The linkage mechanism drives the brush bristles to reciprocate and sweep, and with the help of high-pressure water, it achieves secondary cleaning of iron oxide scale, greatly improving the thoroughness of cleaning and avoiding residues that may affect the rolling quality of steel plate 11; the first spring 109 enables the brush bristles to adapt to the plate surface, buffering the contact force, reducing wear, and extending service life; the adjusting rod 119 can precisely adjust the brush bristle extension and retraction stroke to adapt to different plate widths and cleaning needs, improving the equipment's adaptability to different operating conditions; the second spring 112 ensures the stability of the brush bristle reciprocating motion and avoids jamming and impact.

[0066] like Figure 21 and 22As shown, as an optimization of Embodiment 1, a third guide seat 121 is connected to the top surface of the second guide seat 111. A third guide rod 122 is slidably connected to the third guide seat 121. The free end of the third guide rod 122 is connected to a first base plate 123. A second cover plate 124 is connected to the first base plate 123. The second cover plate 124 has evenly arranged sliding holes 107. A second brush bristle 125 is slidably connected inside the sliding holes 107. The cross-sectional shape of the second brush bristle 125 is T-shaped. A third spring 126 is connected to the side of the second brush bristle 125. The second brush bristle 125 is used to clean the side of the steel plate 11 after high-pressure water cleaning. A lead screw 127 is threadedly connected to the third guide seat 121. One end of the lead screw 127 is rotatably connected to the first base plate 123. Technical problem: The iron oxide scale on the side of the existing steel plate 11 cannot be effectively cleaned, and blind spots are easily formed. The brush bristles cannot adaptively fit the side of the steel plate 11, resulting in poor adaptability to working conditions and affecting the overall surface quality of the steel plate 11. Movement Process: Rotating the lead screw 127 drives the third guide rod 122 to move horizontally, adjusting the position of the first base plate 123 so that the second bristles 125 fit against the side of the steel plate 11; the second bristles 125 elastically extend and retract through the third spring 126, adaptively fitting against the side of the steel plate 11, and synchronously cleaning residual iron oxide scale on the side as the slide plate 105 reciprocates. Beneficial Effects: The second bristles 125 achieve synchronous cleaning of iron oxide scale on the side of the steel plate 11, eliminating blind spots and achieving all-round cleaning of the entire surface of the steel plate 11, significantly improving the overall cleaning effect of iron oxide scale and ensuring the rolling quality of the entire surface of the steel plate 11; the lead screw 127 transmission can precisely adjust the bristle position to adapt to the side cleaning needs of steel plates 11 of different widths, improving the equipment's adaptability to operating conditions; the third spring 126 makes the bristles adaptively fit against the side, buffering contact force to reduce wear, extending service life, and ensuring stable cleaning results.

[0067] like Figure 23 and 24 As shown, as an optimization of Embodiment 1, the top surface of the third guide seat 121 is connected to the second base plate 128. Two symmetrically arranged first rod seats 57 are mounted on the second base plate 128. Support rods 59 are fixed to the first rod seats 57 via buckles 58. Adjustment seats 60 are mounted on the support rods 59, and second nozzles 129 are mounted on the adjustment seats 60. The second nozzles 129 are used to clean the secondary iron oxide scale on the sides of the steel plate 11. Technical problem: The existing secondary iron oxide scale on the sides of the steel plate 11 cannot be effectively pre-cleaned with high-pressure water. Brushes alone cannot remove stubborn iron oxide scale. The side nozzles have poor adjustment flexibility, affecting the surface quality of the steel plate 11's sides. Beneficial effects: The high-pressure water pre-cleaning of the second nozzle 129 can remove stubborn iron oxide scale from the side of the steel plate 11. Combined with the secondary cleaning of the brush, it greatly improves the thoroughness of the iron oxide scale removal and ensures the surface quality of the side of the steel plate 11. The adjusting seat 60 can flexibly adjust the nozzle parameters to adapt to the cleaning needs of different plate widths and improve the adaptability of the equipment to different working conditions. The buckle plate 58 and the support rod 59 enable the nozzle to be quickly installed and fixed, making assembly and debugging convenient and easy to maintain and replace.

[0068] like Figure 25-27 As shown, as an optimization of Embodiment 1, two symmetrically arranged scraper assemblies 130 are connected to the machine base 2. The scraper assemblies 130 clean the water from the surfaces of the first roll body 31 and the second roll body 37, reducing oxidation during the rolling process. The scraper assembly 130 includes a third hinge seat 131 and a fourth hinge seat 132. An eighth link 133 is hinged to the third hinge seat 131 and the fourth hinge seat 132. The hinge point is located in the middle of the eighth link 133. The head end is connected to a scraper 134, which consists of a vertical section 135 and an arc-shaped section 136. A scraper strip 137 is connected to the top surface of the arc-shaped section 136 of the scraper 134. The scraper strip 137 is adapted to the first roller body 31 (second roller body 37). The scraped water falls along the vertical section 135 outside the projection area of ​​the steel plate 11. The tail end of the eighth connecting rod 133 is connected to a fourth spring 138, which causes the eighth connecting rod 133 on both the upper and lower sides to adaptively conform to the roller body. Technical problem: High-pressure water easily remains on the surface of the existing rollers. The moisture, upon contact with the steel plate 11, intensifies the oxidation reaction, generating more secondary iron oxide scale. Furthermore, the existing scraping mechanism cannot adaptively conform to the roller surface, resulting in poor scraping effect and easy residue buildup. Movement Process: The fourth spring 138, through leverage, causes the scraper 134 and scraper bar 137 at the head of the eighth link 133 to adaptively press against the roller surface. When the roller rotates, the scraper bar 137 scrapes off residual moisture from the roller surface. The moisture is guided along the scraper 134 to drip outside the projected area of ​​the steel plate 11, avoiding contact with the steel plate 11. Beneficial Effects: The lever structure combined with the spring allows the scraper bar 137 to adaptively conform to the roller, maintaining a tight fit even after wear, significantly improving the water scraping effect on the roller surface and thoroughly removing residual moisture. The guide structure of the scraper 134 prevents moisture from contacting the steel plate 11, greatly reducing the probability of contact between the steel plate 11 and moisture during rolling, inhibiting oxidation reactions, reducing the formation of secondary iron oxide scale, and improving the rolling quality of the steel plate 11. The structure is simple, easy to install, highly adaptive, and has a long service life.

[0069] like Figures 28-30As shown, as an optimization of Embodiment 1, a cover 139 is connected to the base 2. The side wall of the cover 139 has an inlet 140 and an outlet 141. A steam exhaust pipe 142 is connected to the top surface of the cover 139. A first collection trough 143 is installed on the bottom surface of the cover 139, and a first auger 144 is installed inside the first collection trough 143. The first auger 144 is used to collect and transport secondary iron oxide scale. Technical problem: The steam and iron oxide scale debris generated by the existing rolling mill spread without organization, polluting the working environment and being difficult to collect and clean. The lack of a closed structure leads to the easy loss of the nitrogen protective atmosphere, resulting in poor oxidation inhibition effect. Operation Process: The hood 139 encloses the rolling and cleaning operation area of ​​the unit. Steel plates 11 enter through inlet 140 and exit through outlet 141 after completing the operation. Steam generated by high-pressure water cleaning is discharged through steam exhaust pipe 142 on the top surface of the hood 139. Detached iron oxide scale fragments fall into the first collection trough 143 on the bottom surface of the hood 139 and are then transported and discharged by the first auger 144. Beneficial Effects: The hood 139 encloses the operation area, preventing the unorganized diffusion of steam and iron oxide scale fragments, improving the working environment, reducing the loss of nitrogen protective atmosphere, and enhancing the oxidation inhibition effect. It also enables centralized steam discharge and centralized collection and transportation of iron oxide scale, facilitating the recycling and treatment of iron oxide scale, preventing fragments from scattering and affecting equipment operation, and reducing the difficulty of equipment maintenance.

[0070] like Figure 28 and 30As shown, as an optimization of Embodiment 1, a second collection trough 145 is installed on the cover 139, and a fourth rotating shaft 146 is rotatably connected to the cover 139. The fourth rotating shaft 146 is driven by a third motor 147. A third roller body 148 is connected to the fourth rotating shaft 146, and a magnetic plate 149 is connected to the side wall of the fourth rotating shaft 146. The magnetic plate 149 has a semi-circular cross-sectional shape and is located inside the third roller body 148. As the fourth rotating shaft 146 rotates, it drives the magnetic plate 149 to rotate, adsorbing the secondary iron oxide scale that is thrown up by the high-pressure water impact onto the surface of the third roller body 148. A baffle plate 150 is connected to the horizontal section of the first collection trough 143. The baffle plate 150 has a triangular cross-sectional shape and is used to scrape off the adsorbed secondary iron oxide scale. A second auger 151 is installed inside the second collection trough 145 and is used to transport the secondary iron oxide scale into the first collection trough 143. Technical Problem: Existing iron oxide scale collection mechanisms cannot effectively collect iron oxide scale fragments ejected by high-pressure water impact. The fragments easily scatter and adhere to the inside of the equipment, making them difficult to clean. This results in incomplete iron oxide scale collection and low recycling efficiency. Motion Process: The third motor 147 drives the fourth rotating shaft 146 to rotate, causing the third roller 148 and the internal magnetic plate 149 to rotate synchronously. The magnetic force of the magnetic plate 149 attracts the ejected iron oxide scale fragments to the surface of the roller. When the roller rotates the fragments to the baffle plate 150, the baffle plate 150 scrapes the fragments down into the second collection trough 145, and then conveys them through the second auger 151 to the first collection trough 143 for centralized discharge. Beneficial effects: The magnetic adsorption of the magnetic plate 149 can effectively collect scattered iron oxide scale debris, solving the problem of difficult debris collection and greatly improving the thoroughness and recycling efficiency of iron oxide scale collection; the semi-circular magnetic plate 149, together with the baffle plate 150, realizes the adsorption and automatic scraping separation of iron oxide scale, with a simple structure and stable operation; the double collection trough and auger work together to realize the unified collection and treatment of iron oxide scale, avoid debris adhering to the inside of the equipment, reduce the difficulty of equipment maintenance, and ensure the stable operation of the equipment.

[0071] like Figure 32 As shown in Embodiment 2, unlike Embodiment 1, the water spraying mechanism 12 includes a first support base 43 connected to the base 2. A fifth guide rail 152 is connected to the first support base 43, and a fifth slide block 153 is slidably connected to the fifth guide rail 152. A first carrier plate 44 is connected to the fifth slide block 153, and a second telescopic rod 154 is connected to the first support base 43. The free end of the second telescopic rod 154 is connected to the first carrier plate 44. Movement process: The second telescopic rod 154 extends and retracts, driving the fifth slide block 153 to move horizontally and linearly along the fifth guide rail 152, causing the first carrier plate 44 to move synchronously, realizing rapid linear adjustment of the nozzle assembly on the carrier plate. Beneficial effects: The telescopic rod and the guide rail slide block cooperate to achieve rapid linear adjustment of the nozzle position; the structure is simple and the adjustment speed is fast.

[0072] like Figure 33As shown in Embodiment 3, unlike Embodiment 1, the first nozzle 61 and the second nozzle 129 include an outer tube 155 for injecting high-pressure water. The middle part of the outer tube 155 has a constriction structure 156, and a gas supply pipe 157 is connected to the side wall of the outer tube 155. An inner tube 158 is connected to the gas supply pipe 157 located inside the outer tube 155. The outlet shape of the inner tube 158 is conical. By defining the structure of the nozzle, the sprayed high-pressure water carries nitrogen gas, which can reduce the degree of oxidation on the steel plate 11 when removing secondary iron oxide scale. Technical problem: Existing nozzles can only spray high-pressure water to clean iron oxide scale. During the cleaning process, the contact between the high-pressure water and the steel plate 11 will aggravate the oxidation reaction and cannot simultaneously inhibit the oxidation of the steel plate 11. Secondary iron oxide scale is easy to regenerate, affecting the surface quality of the steel plate 11. Movement Process: High-pressure water is injected into the outer pipe 155 and accelerated through the constriction structure 156 to form a high-speed water flow. Nitrogen gas enters the inner pipe 158 through the gas delivery pipe 157 and is sprayed out through the conical outlet to mix with the high-pressure water. This allows the sprayed high-pressure water to carry nitrogen gas, cleaning the iron oxide scale while simultaneously forming a local protective atmosphere on the surface of the steel plate 11, inhibiting the oxidation reaction of the steel plate 11. Beneficial Effects: The constriction structure 156 of the nozzle, in conjunction with the inner pipe 158, ensures thorough mixing of high-pressure water and nitrogen gas, achieving simultaneous iron oxide scale cleaning and oxidation inhibition. This significantly reduces the degree of oxidation of the steel plate 11 during the cleaning process, avoids secondary iron oxide scale regeneration, and improves the surface cleaning effect and rolling quality of the steel plate 11. The conical outlet enhances the uniformity of gas-water mixing, ensuring the effectiveness of nitrogen protection. The nozzle structure is compact, requiring no additional protective equipment, and can be directly adapted to existing pipeline systems, resulting in low modification costs and strong adaptability.

[0073] Traditional hydraulic power units typically operate at rated pressure and speed, but the actual load action is usually discontinuous, with most of the time spent under no-load conditions, resulting in significant energy waste. Furthermore, when multiple pumps are running, the frictional resistance of the pumps' mechanical structures cannot be perfectly uniform, and a certain working pressure must be maintained, necessitating a certain flow rate. This means one pump will always discharge oil at a high flow rate, causing its motor to operate at its rated current continuously, which negatively impacts its lifespan over time. Therefore, a hydraulic pump servo pressure load balancing and energy-saving control system for rolling mill units is proposed. This hydraulic system uses a variable displacement hydraulic pump as the core power source, forming a three-part network: a high-pressure main oil circuit, a pilot control oil circuit, and a low-pressure return oil circuit. The core control components are integrated into the valve block 160 (marked by cloud lines), creating a complete hydraulic circuit integrating pressure control, direction control, safety protection, load stabilization, and energy-saving control. The variable displacement hydraulic pump's suction port is directly connected to the oil tank interface S, and its outlet leads to the high-pressure main oil circuit. One path connects upwards to the core control valve group within the valve block 160, and the other path connects downwards to the inlet of the solenoid directional valve. The pump outlet is connected in parallel with a main relief valve, whose outlet is connected to the return oil line to limit the system's maximum working pressure and provide overload protection. After entering valve block 160, the high-pressure main oil first connects to the DRG pressure reducing valve assembly 161. This assembly includes a pressure reducing valve, a check valve, and a throttling element, which reduces and stabilizes the high-pressure oil in the main oil circuit before outputting stable control oil. This control oil is then connected to the control chambers of the left and right RBAE-LAN ​​pressure regulating relief valves and the DUDA-WHN-224 cartridge directional valve 162, respectively. An X-interface is also provided as a remote control port to provide a stable oil source for the entire pilot control circuit. The high-pressure main oil in valve block 160 is distributed... The system has two independent functional branches, left and right. The high-pressure oil in the left branch enters the inlet chamber of the left-side DUDA cartridge valve. The control chamber of this valve is simultaneously connected to the left-side working port of the left-side RBAE-LAN ​​pressure regulating relief valve and the solenoid directional valve. The outlet chamber is connected to the inlet port of the load balance valve 163. The outlet port of the load balance valve 163 is connected to an external hydraulic actuator, and the load feedback port is connected back to the control end of the cartridge valve to achieve stable load control. The high-pressure oil in the right branch enters the inlet chamber of the right-side DUDA cartridge valve. The control chamber of this valve is simultaneously connected to the right-side RBAE-LAN ​​pressure regulating relief valve and the right-side working port of the solenoid directional valve. The outlet chamber is divided into two... The oil inlets of the system safety valve and energy-saving valve are connected to the oil return line, respectively, to achieve redundant safety protection and no-load energy-saving unloading of the system. The oil inlet of the electromagnetic reversing valve is connected to the high-pressure control oil led out from the pump outlet, and the oil return port is connected to the main oil return line. The left and right working positions can be switched by gaining and losing power to control the on and off of the left and right cartridge valves respectively, realizing the reversing logic control of the system action. The oil return ports and overflow ports of all valves in the entire system are all connected to the main oil return line, and finally connected to the oil tank interface L and L1 to send the low-pressure oil back to the oil tank, completing the complete closed-loop hydraulic cycle of "oil suction-pressurization-control-execution-return".

[0074] This system features two-stage pressure control, enabling high-current motor rotation balancing when multiple pumps are interconnected, protecting the motors and extending their lifespan; the control valve block has a standardized 160 design, a compact structure, and meets interchangeability requirements; it achieves standby energy saving and maximizes economic benefits.

[0075] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel rolling mill unit, comprising a base (1), on the top surface of which are mounted two symmetrically arranged machine bases (2), the opposite surfaces of the two machine bases (2) having through grooves (4), the through grooves (4) being provided with a first roll assembly (6) and a second roll assembly (9) for rolling steel plates (11), characterized in that, Two symmetrically arranged support beams (3) are installed on the upper side wall of the machine base (2); a first lifting mechanism (5) is installed on the bottom surface of the through groove (4), and a first roll assembly (6) is installed at the output end of the first lifting mechanism (5); two symmetrically arranged first guide rails (7) are installed on the side of the through groove (4), a first slide block (8) is slidably connected on the first guide rail (7), and a second roll assembly (9) is installed on the first slide block (8), and the second roll assembly (9) is driven to lift by the second lifting mechanism (10); two symmetrically arranged water spraying mechanisms (12) are installed on the side of the machine base (2), and the water spraying mechanism (12) is used to clean the secondary iron oxide scale on the upper and lower surfaces of the steel plate (11); a jet spraying mechanism (13) is installed on the machine base (2), and the jet spraying mechanism (13) is used to spray nitrogen gas to blow the steel plate (11) after removing the iron oxide scale, and form a protective gas layer around the steel plate (11) to inhibit the oxidation reaction.

2. The rolling mill unit according to claim 1, characterized in that, The first lifting mechanism (5) includes a base plate (14) connected to the machine base (2). Two symmetrically arranged first vertical plates (15) and second vertical plates (16) are mounted on the base plate (14). Two symmetrically arranged second guide rails (17) are slidably connected to the first vertical plates (15). A second slide block (18) is slidably connected to the second guide rails (17). A first wedge-shaped seat (19) is connected to the second slide block (18). The top surface of the first wedge-shaped seat (19) is connected to a device for mounting the first roll assembly (6). The top plate (20) and the bottom plate (14) are equipped with two symmetrically arranged third guide rails (21). The third guide rails (21) are slidably connected to the third slide (22). The third slide (22) is equipped with a second wedge seat (23). The wedge surface of the second wedge seat (23) is in contact with the wedge surface of the first wedge seat (19) to push the first wedge seat (19) to rise and fall. The second wedge seat (23) is driven by the first telescopic rod (24). The first telescopic rod (24) is located on the second vertical plate (16).

3. The rolling mill unit according to claim 1, characterized in that, The second lifting mechanism (10) includes a first housing (38) connected to the base (2), a second ball bearing (35) is installed inside the first housing (38), a first worm gear (39) is installed on the second ball bearing (35), a first screw (40) is threaded to the center of the first worm gear (39), the lower end of the first screw (40) is connected to the second roll assembly (9), the first worm gear (39) meshes with a first worm (41), and the first worm (41) is driven by a variable hydraulic pump (42).

4. The rolling mill unit according to claim 1, characterized in that, The water spraying mechanism (12) includes a first support seat (43) connected to the base (2), a first carrier plate (44) connecting the two first support seats (43) with a gap, two symmetrically arranged first hinge seats (45) mounted on the first carrier plate (44), and a first connecting rod (46) hinged to the first hinge seat (45); two symmetrically arranged third carrier seats (47) mounted on the first carrier plate (44), a third bearing seat (48) mounted on the third carrier seat (47), a second lead screw (49) rotatably connected to the third bearing seat (48), the second lead screw (49) being driven by a worm gear mechanism (50), a fourth guide rail (51) mounted on the third carrier seat (47), and a fourth slide seat slidably connected to the fourth guide rail (51). 52), the fourth slide (52) is connected to a movable seat (53) that is threadedly connected to the second lead screw (49); the fourth slide (52) is connected to a second hinge seat (54), the second hinge seat (54) is hinged to a second connecting rod (55), the free end of the first connecting rod (46) is hinged to the middle of the second connecting rod (55), the free end of the second connecting rod (55) is hinged to a second carrier plate (56), two symmetrically arranged first rod seats (57) are installed on the second carrier plate (56), the first rod seat (57) is fixed to a support rod (59) by a buckle plate (58), the support rod (59) is installed to an adjustment seat (60), the adjustment seat (60) is installed to a first nozzle (61), the first nozzle (61) is supplied with water through the main water pipe (62).

5. The rolling mill unit according to claim 1, characterized in that, There are four jet mechanisms (13), two in a group. The two groups of jet mechanisms (13) are located on the inlet and outlet sides of the steel plate (11) respectively. The jet mechanisms (13) in the same group are located on the upper and lower sides of the steel plate (11). The jet mechanism (13) includes a fourth bearing seat (67) connected to the base (2). A slide tube (68) is installed on the fourth bearing seat (67). The inner wall of the slide tube (68) has a guide groove (69). A spirally arranged air nozzle (70) is installed on the side wall of the slide tube (68). A rotary joint (71) is installed at one end of the slide tube (68). A second housing (72) is installed on the base (2). A fifth bearing seat (73) is installed inside the second housing (72). A second worm gear (74) is installed on the fifth bearing seat (73). A first cam (75) is connected to the shaft end of the second worm gear (74). A third connecting rod (76) is rotatably connected to the first cam (75). The second worm gear (74) meshes with a second The worm (77) and the second worm (77) are driven by the first motor (78). The shaft end of the second worm (77) is connected to the slide rod (79). The left end of the slide rod (79) is located inside the slide tube (68). The side wall of the slide rod (79) has a first guide rod (80) that is slidably adapted to the guide groove (69). The end of the slide tube (68) located inside the second housing (72) is connected to the first guide seat (81). The side wall of the first guide seat (81) has a first annular groove (82). The second housing (72) is equipped with a sixth bearing seat (83), and a fourth connecting rod (84) is hinged on the sixth bearing seat (83). The free end of the third connecting rod (76) is hinged to the middle of the fourth connecting rod (84). The free end of the fourth connecting rod (84) is connected to a first short shaft (85), and a roller (86) adapted to the first annular groove (82) is rotatably connected to the first short shaft (85). The first motor (78) drives the slide tube (68) to rotate and slide axially back and forth.

6. The rolling mill unit according to claim 5, characterized in that, The rotary joint (71) includes a rotary tube (87) connected to the slide tube (68), a sealed bearing (88) rotatably connected to the rotary tube (87), a fixed tube (89) rotatably connected to the rotary tube (87), a second annular groove (90) on the side wall of the fixed tube (89), an airflow channel (91) communicating with the slide tube (68) on the second annular groove (90), a sealing ring (92) installed on the outer wall of the fixed tube (89), the sealing ring (92) being located on both sides of the second annular groove (90); a pipe joint (93) is connected to the side wall of the rotary tube (87), the pipe joint (93) being opposite to the second annular groove (90).

7. The rolling mill unit according to claim 1, characterized in that, A motor mounting base (94) is installed on the top surface of the base (1), and a second motor (95) is installed on the motor mounting base (94). The second motor (95) is connected to a reduction gearbox (97) through a first coupling (96). A housing (98) is connected to the top surface of the base (1). A driving gear (99) and a driven gear (100) are rotatably connected inside the housing (98). The driving gear (99) is connected to the reduction gearbox (97) through a second coupling (101). The driving gear (99) is connected to the first rotating shaft (29) of the first roll assembly (6) through a first universal drive shaft (102), and the driven gear (100) is connected to the second rotating shaft (36) of the second roll assembly (9) through a second universal drive shaft (103).

8. The rolling mill unit according to claim 4, characterized in that, The second carrier plate (56) has a groove (104), a slide plate (105) is slidably connected in the groove (104), a first cover plate (106) is connected to the top surface of the slide plate (105), the first cover plate (106) has evenly arranged sliding holes (107), a first bristle (108) with a T-shaped cross section is slidably connected in the sliding holes (107), a first spring (109) is connected to the bottom surface of the first bristle (108); a second guide rod (110) is connected to the side wall of the slide plate (105), a second guide seat (111) connected to the second carrier plate (56) is slidably connected to the second guide rod (110), a second spring (112) is sleeved on the side wall of the second guide rod (110), and the second spring (112) is elastically connected to the second guide seat (111) and the slide plate (56). Between 105); the seventh bearing seat (113) is connected to the second guide seat (111), the third rotating shaft (114) is rotatably connected to the seventh bearing seat (113), the second short shaft (115) is connected to the axis of the third rotating shaft (114), the fifth connecting rod (116) is connected to the side wall of the third rotating shaft (114), the sixth connecting rod (117) is hinged to the free end of the fifth connecting rod (116), the third short shaft (118) is rotatably connected to the free end of the sixth connecting rod (117), the adjusting rod (119) is threadedly connected to the side wall of the third short shaft (118) and the second short shaft (115); the seventh connecting rod (120) is rotatably connected to the side wall of the third short shaft (118), and the free end of the seventh connecting rod (120) is hinged to one of the second guide rods (110).

9. The rolling mill unit according to claim 8, characterized in that, The top surface of the second guide seat (111) is connected to the third guide seat (121), the third guide rod (122) is slidably connected to the third guide seat (121), the free end of the third guide rod (122) is connected to the first base plate (123), the first base plate (123) is connected to the second cover plate (124), the second cover plate (124) has evenly arranged sliding holes (107), the sliding holes (107) are slidably connected to the second bristles (125) with a T-shaped cross section, and the side of the second bristles (125) is connected to the third spring (126); the third guide seat (121) is threadedly connected to the lead screw (127), and one end of the lead screw (127) is rotatably connected to the first base plate (123).

10. A hydraulic pump servo pressure load balancing and energy-saving control system for a rolling mill unit according to any one of claims 1-9, comprising a hydraulic power unit, wherein the hydraulic power unit is equipped with a variable hydraulic pump connected to an oil tank, characterized in that, The variable displacement hydraulic pump is the core power source of the system. The system forms three major oil circuit networks: a high-pressure main oil circuit, a pilot control oil circuit, and a low-pressure return oil circuit. The core control components of the system are all integrated within the valve block. The suction port of the variable displacement hydraulic pump is connected to the oil tank interface S, and the discharge port leads out to the high-pressure main oil circuit. The high-pressure main oil circuit is divided into two paths: one path connects to the core control valve group within the valve block, and the other path connects to the inlet of the solenoid directional valve. The discharge port of the variable displacement hydraulic pump is also connected in parallel to the main relief valve, and the discharge port of the main relief valve connects to the return oil pipeline. After entering the valve block, the high-pressure main oil first connects to the DRG pressure reducing valve group. The DRG pressure reducing valve group has a built-in pressure reducing valve, check valve, and throttling element. The control oil output from the DRG pressure reducing valve group is connected to the control chambers of the left and right sets of RBAE-LAN ​​pressure regulating relief valves and DUDA-WHN-224 cartridge directional valves, respectively. It also has an X interface as a remote control port. The high-pressure main oil within the valve block is divided into two independent functional branches, left and right. The high-pressure oil in the left branch is connected to... The inlet chamber of the cartridge-type directional valve on the left is connected to the control chamber of both the left-side RBAE-LAN ​​pressure regulating relief valve and the left-side working port of the solenoid directional valve. Its outlet chamber is connected to the inlet of the load balance valve, whose outlet is connected to the hydraulic actuator. The load feedback port is connected back to the control terminal of the cartridge-type directional valve. High-pressure oil from the right branch enters the inlet chamber of the cartridge-type directional valve on the right. The control chamber of this valve is connected to both the right-side RBAE-LAN ​​pressure regulating relief valve and the solenoid directional valve. The right-side working port of the electromagnetic directional valve has two outlets, which are respectively connected to the inlet ports of the system safety valve and the energy-saving valve. The outlet ports of the system safety valve and the energy-saving valve are both connected to the return oil pipeline. The return oil port of the electromagnetic directional valve is connected to the main return oil pipeline. The working position is switched by gaining and losing power to control the on / off of the left and right cartridge directional valves. The return oil ports and overflow ports of all valves in the entire system are all connected to the main return oil pipeline. The main return oil pipeline is connected to the oil tank interfaces L and L1 to form a complete closed hydraulic cycle.

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