Integrated combined stretch-bending straightening unit

Abstract

The invention discloses an integrated combined stretch-bending straightening unit which is mainly used for straightening operation of a tin-plated plate strip. The stretch-bending straightening unit comprises a tension roller set, a tension roller main transmission system, a compression roller set, an integrated rack, a pressing-down device, an upper bending roller box, a lower lifting device, a lower bending roller box, a lower straightening roller box, an upper lifting device, an upper straightening roller box, an eleven-roller upper roller box, an eleven-roller lower roller box, a steering roller and a roller changing device. The tinplate strip straightening machine is simple in structure, adopts an integrated design, does not need to be provided with eight groups of independent motor transmission mechanisms or a differential transmission mechanism, the bending roller group and the eleven-roller system can bend a plate strip, the plate strip generates enough elongation under the action of tensile tension and bending, the straightening operation of the tinplate strip is completed, and the production efficiency is improved. And all the roller boxes can be pulled out simultaneously through the roller replacing device, so that the roller boxes can be replaced and maintained more conveniently and quickly, the product quality can be effectively improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of metal rolling equipment, and particularly to an integrated combined tension leveller for a continuous annealing unit, a galvanizing unit, a color coating unit, a tin plating unit, a degreasing unit, and a tension levelling and recoiling unit of a steel strip. Background Art

[0002] In a continuous annealing unit, a galvanizing unit, a color coating unit, a tin plating unit, a degreasing unit, and a tension levelling and recoiling unit of a steel strip, in order to improve the strip shape quality of the strip, it is necessary to correct the strip shape.

[0003] At present, the common types of integrated combined tension levellers at home and abroad are differential drive or individual motor drive. Although the differential drive equipment has high transmission accuracy, its manufacturing cost and maintenance cost are high; the individual motor drive also has the problem of high cost and poor transmission accuracy. Summary of the Invention

[0004] To overcome the deficiencies of the prior art, the invention purpose of the present invention is to provide an integrated combined tension leveller to improve the transmission accuracy of the equipment.

[0005] To achieve the above invention purpose, the integrated combined tension leveller of the present invention includes a tension roll group, a tension roll main drive system, a pressure roll group, an integrated frame, a roll gap adjusting device, an upper bending roll box, a lower lifting device, a lower bending roll box, a lower straightening roll box, an upper lifting device, an upper straightening roll box, an eleven-roll upper roll box, an eleven-roll lower roll box, a turning roll, and a roll changing device; the tension roll group is installed at the inlet and outlet of the tension leveller. The inlet tension roll main drive motor transmits power to the inlet tension rolls through a speed reducer one and a gear distribution box, and the outlet tension roll main drive motor transmits power to the outlet tension rolls through a speed reducer one and a gear distribution box. Through the diameter difference of each tension roll, a strip tensile tension is established in the tension levelling section of the tension leveller; the upper bending roll box, the upper straightening roll box, and the eleven-roll upper roll box installed above the integrated frame and the lower bending roll box, the lower straightening roll box, and the eleven-roll lower roll box installed below the integrated frame generate bending stress on the strip, and under the combined action of the tensile stress and the bending stress, the strip is moderately extended, so as to straighten the strip; the pressure roll group is installed at the inlet and outlet of the tension leveller. The air cylinders of the pressure roll group extend, and the strip is pressed on the tension rolls through the pressure rolls to generate a pressing force on the strip; multiple turning rolls for guiding the strip operation are distributed inside the integrated frame.

[0006] Furthermore, one group of the tension roll group is installed at each of the inlet and outlet of the tension leveller, and each group includes four tension rolls. The tension roll group is installed in the installation holes of the integrated frame; the tension roll group includes tension rolls and the bearings on both sides thereof, an operator side bearing block, and a drive side bearing block. The operator side bearing block is connected to the integrated frame by a screw one, and the drive side bearing block is floatingly connected to the integrated frame.

[0007] Furthermore, the output shaft of the gear distribution box of the main drive system of the tension roller is connected to the drive side shaft head of the tension roller through a constant velocity joint one. The input shaft of the gear distribution box is connected to the first speed reducer through a constant velocity joint three. The gear distribution box is installed on the gear box base, and the gear box base is fixedly connected to the integral frame by bolts. The main drive motor of the tension roller is connected to the first speed reducer through a constant velocity joint two. A brake is provided on the constant velocity joint two. The main drive motor, the first speed reducer, and the brake are installed on the main drive base.

[0008] Furthermore, two sets of the press roller groups are installed at the inlet and outlet of the stretch-bending leveling unit respectively, and are placed below the lowermost tension roller. A set of cylinder seats is installed at both ends of the press roller of each press roller group. The cylinders are installed on the cylinder seats, and the cylinder seats are fixed to the first connecting beam by screws two. The cylinders drive the press roller frame to press the press rollers on the tension roller. The press roller frame is connected to the press roller frame support through a rotary pin, and the press roller frame support is installed on the first connecting beam. The first connecting beam is connected to the two side frames of the integral frame.

[0009] Furthermore, the integral frame is composed of two side frames, the first upper cross beam, the second upper cross beam, the third upper cross beam, the first lower cross beam, the second lower cross beam, and the second connecting beam. The two side frames are connected into one body by screws to the first upper cross beam, the second upper cross beam, the third upper cross beam, the first lower cross beam, the second lower cross beam, and the second connecting beam. Both ends of the lower roll box track are fixed on the two side frames and extend out of the side frame on one side of the roll changing device. There are eight such lower roll box tracks.

[0010] Furthermore, there are three sets of the roll gap adjusting devices, including the first roll gap adjusting device, the second roll gap adjusting device, and the third roll gap adjusting device which act on two sets of upper bending roll boxes and one set of eleven-roll upper roll boxes respectively. The structures of the first roll gap adjusting device, the second roll gap adjusting device, and the third roll gap adjusting device are the same. The roll gap force of the third roll gap adjusting device is greater than that of the first roll gap adjusting device and the second roll gap adjusting device. The first roll gap adjusting device, the second roll gap adjusting device, and the third roll gap adjusting device are respectively composed of two roll gap cylinders, a roll box support plate, and a joint. The roll gap cylinders of the first roll gap adjusting device and the second roll gap adjusting device are respectively fixed to the first upper cross beam by screws three. The roll gap cylinder of the third roll gap adjusting device is fixed to the third upper cross beam by screws three. The joint is threadedly connected to the roll gap cylinder, and the top head of the joint is locked with the roll box support plate by a round nut. The length that the joint extends below the roll box support plate is 1 mm - 2 mm.

[0011] Further, there are two sets of the upper bending roll boxes. The roll shafts of the three rows of supporting rolls I in the upper bending roll boxes are installed on the roll box base I. The rollers of the supporting rolls I are connected to the roll shafts through bearings. Two intermediate rolls I are installed on the supporting rolls I, and one working roll I is installed on the two intermediate rolls I. Rotary joints I are installed at both ends of the working roll I and the intermediate rolls I. The rotary joints I are installed on the rotary joint supports I, and the rotary joint supports I are fixed on the roll box base I by screws four. Suspension brackets I and bogies I are respectively installed at both ends of the roll box base I, and two rollers I are respectively installed on the suspension brackets I and the bogies I; the two upper bending roll boxes are respectively hung upside down on the roll box support plates of the screw down device I and the screw down device II through the four rollers I, and the bottom surfaces of the roll box base I are respectively abutted against the joints of the screw down device I and the screw down device II; one end of the roll box base I is connected to the bogie I through a bearing, and the roll box base I can rotate around the rotation center of the bogie I. A pull rod pin I for cooperating with the upper roll box traction device of the roll changing device is installed on the connecting rod I installed at the other end of the roll box base I, and the connecting rod I extends outside the housing on one side of the roll changing device.

[0012] Further, there are five sets of the lower lifting devices, including the lower lifting device I, the lower lifting device II, the lower lifting device III, the lower lifting device IV, and the lower lifting device V which respectively act on two sets of lower bending roll boxes, one set of lower straightening roll boxes, and one set of eleven-roll lower roll boxes. The structures of the lower lifting device I, the lower lifting device II, the lower lifting device III, the lower lifting device IV, and the lower lifting device V are the same, and the top pressures of the lower lifting device IV and the lower lifting device V are greater than those of the lower lifting device I, the lower lifting device II, and the lower lifting device III; the lower lifting device I, the lower lifting device II, the lower lifting device III, the lower lifting device IV, and the lower lifting device V respectively drive two elevators I through a constant velocity joint four by a speed reducer II installed on the drive side housing. An encoder I for displaying the lifting amount of the elevator I is installed at the tail of the speed reducer II. A top head I is installed on the elevator I. A wear-resistant plate and a transition plate are installed on the top head I. The transition plate is pressed tightly on the top head I by a disc spring and a screw five. A spherical plain bearing is installed between the top head I and the transition plate. The elevators I of the lower lifting device I, the lower lifting device II, and the lower lifting device III are fixed on the lower crossbeam I by screws, and the elevators I of the lower lifting device IV and the lower lifting device V are fixed on the lower crossbeam II by screws. The top head I abuts against the bottom surfaces of the corresponding roll box bases of two sets of lower bending roll boxes, one set of lower straightening roll boxes, and one set of eleven-roll lower roll boxes.

[0013] Further, there are two sets of the lower bending roll boxes. The roll shafts of the three columns of supporting rolls II in the lower bending roll boxes are installed on the roll box base II. The rollers of the supporting rolls II are connected to the roll shafts through bearings. Two intermediate rolls II are installed on the supporting rolls II, and one working roll II is installed on the two intermediate rolls. Rotary joints II are installed at both ends of the working roll II and the intermediate rolls II. The rotary joints II are installed on the rotary joint supports II, and the rotary joint supports II are fixed on the roll box base II by screws VI. Two rollers II are installed on one side of the roll box base II. The lower bending roll boxes are placed on the lower roll box track through the two rollers II and the support block I on the other side of the roll box base II. A pin hole I for cooperating with the lower roll box traction device of the roll changing device is provided on the connecting rod II installed at one end of the roll box base II, and the connecting rod extends outside the housing on one side of the roll changing device.

[0014] Further, there is one set of the lower straightening roll boxes. The roll shafts of the three columns of supporting rolls III in the lower straightening roll boxes are installed on the roll box base III. The rollers of the supporting rolls III are connected to the roll shafts through bearings. Two intermediate rolls III of the supporting rolls III are installed on the supporting rolls III, and one working roll III is installed on the two intermediate rolls III. Rotary joints III are installed at both ends of the working roll III and the intermediate rolls III. The rotary joints III are installed on the rotary joint supports III, and the rotary joint supports III are fixed on the roll box base III by screws VII. Two rollers III are installed on one side of the roll box base III. The lower straightening roll boxes are placed on the lower roll box track through the two rollers III and the support block II on the other side of the roll box base III. A pin hole II for cooperating with the lower roll box traction device of the roll changing device is provided on the connecting rod III installed at one end of the roll box base III, and the connecting rod III extends outside the housing on one side of the roll changing device.

[0015] Further, there is one set of the lifting devices, which drives the upper straightening roll box to lift. The lifting device is driven by a reducer III installed on the drive side housing to drive two elevators II through a constant velocity joint V. An encoder II for displaying the lifting amount of the elevator II is installed at the tail of the reducer III. A jack II is installed on the elevator II. One end of the jack II is threadedly connected to the elevator II, and the other end of the jack II is connected and fixed to the lifting device support plate. The length of the jack II extending below the lifting device support plate is 1 mm - 2 mm. The jack II abuts against the bottom surface of the roll box base IV of the upper straightening roll box. The elevator II of the lifting device is fixed on the upper crossbeam II by screws VIII.

[0016] Further, there is one set of upper straightening roll box. The roll shafts of the two columns of supporting rolls IV in the upper straightening roll box are installed on the roll box base IV. The rollers of the supporting rolls IV are connected to the roll shafts through bearings. One working roll IV is installed on the two columns of supporting rolls IV. Rotary joints IV are installed at both ends of the working roll IV. The rotary joints IV are installed on the rotary joint supports IV. The rotary joint supports IV are fixed to the roll box base IV by screws IX. Suspension brackets II and bogies II are respectively installed at both ends of the roll box base IV. Two rollers IV are respectively installed on the suspension brackets II and bogies II. The upper straightening roll box is hung upside down on the lifting device tray of the lifting device through the four rollers IV; the bottom surface of the roll box base IV abuts against the top head II of the lifting device; one end of the roll box base IV is connected to the bogie II through a bearing, and the roll box base IV can rotate around the rotation center of the bogie II; a pull rod pin II for cooperating with the upper roll box traction device of the roll changing device is installed on the connecting rod IV installed at the other end of the roll box base IV, and the connecting rod IV extends outside the housing on one side of the roll changing device.

[0017] Further, the roll shafts of the seven columns of supporting rolls V in the eleven-roll upper roll box are installed on the roll box base V. The rollers of the supporting rolls V are connected to the roll shafts through bearings. Six intermediate rolls IV are installed on the supporting rolls V. Five working rolls V are installed on the six intermediate rolls IV. Rotary joints V are installed at both ends of the working rolls V and the intermediate rolls IV. The rotary joints V are installed on the rotary joint supports V. The rotary joint supports V are fixed to the roll box base V by screws X. Suspension brackets III and bogies III are respectively installed at both ends of the roll box base V. Two rollers V are respectively installed on the suspension brackets III and bogies III. The eleven-roll upper roll box is hung upside down on the roll box tray of the screw down device III through the four rollers V; the bottom surface of the roll box base V abuts against the joint of the screw down device III; one end of the roll box base V is connected to the bogie III through a bearing, and the roll box base V can rotate around the rotation center of the bogie III. A pull rod pin III for cooperating with the upper roll box traction device of the roll changing device is installed on the connecting rod V installed at the other end of the roll box base V, and the connecting rod V extends outside the housing on one side of the roll changing device.

[0018] Further, the roll shafts of the seven columns of supporting rolls VI in the eleven-roll lower roll box are installed on the roll box base VI. The rollers of the supporting rolls VI are connected to the roll shafts through bearings. Six intermediate rolls V are installed on the supporting rolls VI. Five working rolls VI are installed on the six intermediate rolls V. Rotary joints VI are installed at both ends of the working rolls VI and the intermediate rolls V. The rotary joints VI are installed on the rotary joint supports VI. The rotary joint supports VI are fixed to the roll box base VI by screws XI. Two rollers VI are installed on one side of the roll box base VI. The eleven-roll lower roll box is placed on the lower roll box track through the two rollers VI and the support block III on the other side of the roll box base VI; a pin hole III for cooperating with the lower roll box traction device of the roll changing device is provided on the connecting rod VI installed at one end of the roll box base VI, and the connecting rod VI extends outside the housing on one side of the roll changing device.

[0019] Furthermore, there are multiple sets of said steering rollers. Positioning sleeves are installed at both ends of the steering roller shafts, and the positioning sleeves are installed in the corresponding holes on both sides of the housing through screw No. 12.

[0020] Furthermore, the base of the roll-changing carriage of the roll-changing device is driven by an oil cylinder. The base of the roll-changing carriage is connected to the piston rod end of the oil cylinder through a pin shaft. The cylinder barrel end of the oil cylinder is installed on the oil cylinder base, and the oil cylinder base is fixed on the ground. Two sets of flat rollers and two sets of V-shaped rollers for effectively preventing the derailment of the base of the roll-changing carriage are installed on the base of the roll-changing carriage. The two sets of flat rollers and the two sets of V-shaped rollers are placed on two tracks, and the two tracks are fixed on the ground. A roll-changing carriage frame is installed on the base of the roll-changing carriage. Four sets of upper roll box traction devices and four sets of lower roll box traction devices are installed on the roll-changing carriage frame. After the four sets of upper roll box traction devices and the four sets of lower roll box traction devices are connected to the pull rod pins or pin holes of the corresponding roll boxes, all the roll boxes can be pulled out simultaneously under the driving force of the oil cylinder.

[0021] Furthermore, the rotating handle No. 2 of the upper roll box traction device of the roll-changing device is connected to one end of a connecting plate through a connecting shaft. The hinge shaft of the connecting plate is connected to support No. 1, and the other end of the connecting plate is connected to a bracket. The bracket is slidably connected to support No. 1, and support No. 1 is fixed on the roll-changing carriage frame. The bracket is provided with pin holes that cooperate with pull rod pin No. 1 on the roll box base No. 1 of the two sets of upper bending roll boxes, pull rod pin No. 2 on the roll box base No. 4 of the upper straightening roll box, and pull rod pin No. 3 on the roll box base No. 5 of the eleven-roll upper roll box. The rotating handle No. 1 is installed at one end of a stop pin through screw No. 13. The other end of the stop pin penetrates into the hole of the bracket. The stop pin sleeved in the hole of the bracket is slidably connected to the inner hole of the bracket. The side of the bracket is provided with a hole that cooperates with the stop pin. The support No. 2 of the lower roll box traction device is provided with a pin hole. During roll changing, the insertion pin is inserted into the pin holes No. 1 on the roll box base No. 2 of the two sets of lower bending roll boxes, pin holes No. 2 on the roll box base No. 3 of the lower straightening roll box, pin holes No. 3 on the roll box base No. 6 of the eleven-roll lower roll box, and the pin hole on support No. 2.

[0022] Compared with the prior art, the integrated combined tension leveling and bending unit of the present invention has a simple structure and adopts an integrated design. It does not need to be equipped with eight sets of separate motor drive mechanisms, nor does it need to configure a differential drive mechanism. Its bending roll group and eleven-roll system can bend the strip. Under the action of tensile tension and bending, the strip can generate sufficient elongation to complete the leveling operation of the tinplate strip, and all the roll boxes can be pulled out simultaneously through the roll-changing device, which is more convenient and fast for replacing and maintaining the roll boxes, can effectively improve the product quality, and reduce the manufacturing cost. Brief Description of the Drawings

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0024] Figure 2 is Figure 1 the side view of

[0025] Figure 3 The Figure 1 structural schematic diagram of the main drive system of the tension roller.

[0026] Figure 4 The Figure 1 structural schematic diagram of the pressure roller set.

[0027] Figure 5 The Figure 1 structural schematic diagram of the integral frame.

[0028] Figure 6 The Figure 1 structural schematic diagram of the screw down device.

[0029] Figure 7 The Figure 2 structural schematic diagram of the lower lifting device.

[0030] Figure 8 The Figure 7 structural schematic diagram of the plug.

[0031] Figure 9 The Figure 2 structural schematic diagram of the upper bending roller box.

[0032] Figure 10 The Figure 2 structural schematic diagram of the lower bending roller box.

[0033] Figure 11 The Figure 2 structural schematic diagram of the lower straightening roller box.

[0034] Figure 12 The Figure 2 structural schematic diagram of the upper lifting device.

[0035] Figure 13 The Figure 2 structural schematic diagram of the upper straightening roller box.

[0036] Figure 14 The Figure 2 structural schematic diagram of the eleven-roll upper roller box.

[0037] Figure 15 The Figure 2 structural schematic diagram of the eleven-roll lower roller box.

[0038] Figure 16 The Figure 1 structural schematic diagram of the turning roller.

[0039] Figure 17 The Figure 1 structural schematic diagram of the roll changing device.

[0040] Figure 18 TheFigure 17 Schematic three-dimensional structure diagram of the roll changing device.

[0041] Figure 19 For Figure 17 Schematic structure diagram of the upper roll box traction device.

[0042] Figure 20 For Figure 19 A-A sectional view of

[0043] Figure 21 For Figure 17 Schematic structure diagram of the lower roll box traction device.

[0044] In the figure: 1. Tension roll group; 2. Tension roll main drive system; 3. Pressure roll group; 4. Integral rack; 5. Gauge device; 6. Upper bending roll box; 7. Lower lifting device; 8. Lower bending roll box; 9. Lower straightening roll box; 10. Upper lifting device; 11. Upper straightening roll box; 12. Eleven-roll upper roll box; 13. Eleven-roll lower roll box; 14. Turning roll; 16. Roll changing device; 17. Tension roll; 18. Bearing; 19. Operating side bearing block; 20. Driving side bearing block; 21. Screw 1; 22. Cardan coupling 1; 23. Gear distribution box; 25. Tension roll main drive motor; 26. Brake; 27. Cardan coupling 2; 28. Reducer 1; 29. Cardan coupling 3; 30. Main drive base; 31. Gearbox base; 32. Pressure roll; 33. Cylinder seat; 34. Cylinder; 35. Screw 2; 36. Connecting beam 1; 37. Rotary pin; 38. Pressure roll frame support; 39. Pressure roll frame; 40. Column; 41. Upper crossbeam 1; 42. Upper crossbeam 2; 43. Upper crossbeam 3; 44. Lower crossbeam 1; 45. Lower crossbeam 2; 46. Connecting beam 2; 48. Gauge cylinder; 49. Roll box support plate; 50. Joint; 51. Screw 3; 52. Round nut; 53. Reducer 2; 54. Cardan coupling 4; 55. Lift 1; 56. Encoder 1; 57. Plug 1; 58. Wear-resistant plate; 59. Transition plate; 60. Disc spring; 61. Screw 5; 62. Spherical plain bearing; 65. Roll box base 1; 65-1. Connecting rod 1; 65-2. Pull rod pin 1; 66. Backup roll 1; 67. Intermediate roll; 68. Work roll; 69. Rotary joint 1; 70. Bogie 1; 71. Roller 1; 72. Suspension bracket 1; 73. Rotary joint support 1; 74. Screw 4; 75. Lower roll box track; 76. Roll box base 2; 76-1. Connecting rod 2; 76-2. Pin hole 1; 77. Backup roll 2; 78. Intermediate roll 2; 79. Work roll 2; 80. Rotary joint 2; 81. Rotary joint support 2; 82. Screw 6; 83. Roller 2; 84. Support block 1; 85. Roll box base 3; 85-1. Connecting rod 3; 85-2. Pin hole 2; 86. Backup roll 3; 87. Intermediate roll 3; 88. Work roll 3; 89. Rotary joint 3; 90. Rotary joint support 3; 91. Screw 7; 92. Roller 3; 94. Reducer 3; 95. Lift 2; 96. Cardan coupling 5; 97. Encoder 2; 98. Upper lifting device support plate; 99. Plug 2; 100. Screw 8; 101. Roll box base 4; 101-1. Connecting rod 4; 101-2. Pull rod pin 2; 102. Backup roll 4; 103. Work roll 4; 104. Rotary joint 4; 105. Rotary joint support 4; 106. Screw 9; 107. Bogie 2; 108. Suspension bracket 2; 109. Roller 4; 110. Roll box base 5; 110-1. Connecting rod 5; 110-2. Pull rod pin 3; 111. Backup roll 5; 112. Intermediate roll 4; 113. Work roll 5; 114. Rotary joint 5;115. Rotary joint support five; 116. Screw ten; 117. Bogie three; 118. Roller five; 119. Suspension frame three; 120. Roller box base six; 120-1. Connecting rod six; 120-2. Pin hole three; 121. Backup roll six; 122. Intermediate roll five; 123. Work roll six; 124. Rotary joint six; 125. Rotary joint support six; 126. Screw eleven; 127. Roller six; 128. Support block three; 129. Steering roller; 130. Positioning sleeve; 131. Screw twelve; 132. Rail; 133. V-shaped roller; 134. Roll changing carriage base; 135. Roll changing carriage frame; 136. Lower roller box traction device; 137. Upper roller box traction device; 138. Oil cylinder base; 139. Oil cylinder; 140. Pin shaft; 141. Flat roller; 142. Bracket; 143. Support one; 144. Screw thirteen; 145. Rotary handle two; 146. Connecting shaft; 147. Connecting plate; 148. Stop pin; 149. Rotary handle one; 150. Plug pin; 151. Support two; Detailed implementation manners

[0045] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18 , Figure 19 , Figure 20 , Figure 21As shown in the figure, the integrated combined tension leveling unit of the present invention is mainly used for the leveling processing of tinplate, and includes a tension roll group 1, a tension roll main drive system 2, a pressure roll group 3, an integrated frame 4, a roll gap adjusting device 5, an upper bending roll box 6, a lower lifting device 7, a lower bending roll box 8, a lower leveling roll box 9, an upper lifting device 10, an upper leveling roll box 11, an eleven-roll upper roll box 12, an eleven-roll lower roll box 13, a turning roll 14, and a roll changing device 16; the tension roll group 1 is installed at the inlet and outlet of the tension leveling unit. The main drive motor 25 of the inlet tension roll transmits power to the inlet tension roll 17 through a first reducer 28 and a gear distribution box 23. The main drive motor 25 of the outlet tension roll transmits power to the outlet tension roll 17 through a first reducer 28 and a gear distribution box 23. By designing the diameter difference of each tension roll 17, a strip tensile tension is established in the tension leveling section of the tension leveling machine; the upper bending roll box 6, the upper leveling roll box 11, and the eleven-roll upper roll box 12 installed above the integrated frame 4, and the lower bending roll box 8, the lower leveling roll box 9, and the eleven-roll lower roll box 13 installed below the integrated frame 4 generate bending stress on the strip. Under the combined action of the tensile stress and the bending stress, the strip is moderately extended, so as to level the strip; the pressure roll group 3 is installed at the inlet and outlet of the tension leveling unit. The cylinder 34 of the pressure roll group 3 extends, and the strip is pressed on the tension roll 17 through the pressure roll 32 to generate the required pressing force on the strip; a plurality of turning rolls 14 for guiding the strip running are distributed inside the integrated frame 4.

[0046] A set of tension roll groups 1 is installed at each of the inlet and outlet of the tension leveling unit. Each set includes four tension rolls 17. The tension roll group 1 is installed in the installation holes of the integrated frame 4; the tension roll group 1 includes tension rolls 17 and the bearings 18, the operator side bearing block 19, and the drive side bearing block 20 on both sides thereof. The operator side bearing block 19 is connected to the integrated frame 4 by screws 21, and the drive side bearing block 20 is floatingly connected to the integrated frame 4 to adapt to the thermal expansion and contraction of the tension roll 17.

[0047] The output shaft of the gear distribution box 23 of the tension roll main drive system 2 is connected to the drive side shaft head of the tension roll 17 through a first constant velocity joint 22. The input shaft of the gear distribution box 23 is connected to the first reducer 28 through a third constant velocity joint 29. The gear distribution box 23 is installed on the gearbox base 31, and the gearbox base 31 is fixedly connected to the integrated frame 4 by bolts; the tension roll main drive motor 25 is connected to the first reducer 28 through a second constant velocity joint 27. The second constant velocity joint 27 is provided with a brake 26. The main drive motor 25, the first reducer 28, and the brake 26 are installed on the main drive base 30.

[0048] Two sets of pinch roll groups 3 are installed at the inlet and outlet of the tension leveller unit, and are placed below the bottommost tension roll 17; at both ends of each pinch roll 32 of each pinch roll group 3, a set of cylinder seats 33 are installed, cylinders 34 are installed on the cylinder seats 33, the cylinder seats 33 are fixed to the connecting beam 1 36 by screws 2 35, the cylinders 34 drive the pinch roll frame 39 to press the pinch rolls 32 on the tension roll 17, the pinch roll frame 39 is connected to the pinch roll frame support 38 through a rotary pin 37, the pinch roll frame support 38 is installed on the connecting beam 1 36, and the connecting beam 1 36 is connected to the two side frames 40 on both sides of the integral frame 4.

[0049] The integral frame 4 is composed of two side frames 40, upper cross beam 1 41, upper cross beam 2 42, upper cross beam 3 43, lower cross beam 1 44, lower cross beam 2 45 and connecting beam 46. The two side frames 40 are connected into one body by screws with the upper cross beam 1 41, upper cross beam 2 42, upper cross beam 3 43, lower cross beam 1 44, lower cross beam 2 45 and connecting beam 46; both ends of the lower roll box track 75 are fixed on the two side frames 40 and extend outside the side frame 40 on one side of the roll changing device 16, so as to facilitate the connection between the upper roll box traction device 137 and the lower roll box traction device 136 of the roll changing device 16 and the pull rod pins or pin holes of the corresponding roll boxes, serving as the sliding track for pulling out all roll boxes under the driving force of the oil cylinder 139; the lower roll box track 75 is eight in four groups and is in sliding fit with the rollers of two sets of lower bending roll boxes 8, one set of lower levelling roll box 9 and one set of eleven-roll lower roll box 13 respectively.

[0050] There are three sets of roll gap adjusting devices 5, including roll gap adjusting device 1 5-1, roll gap adjusting device 2 5-2 and roll gap adjusting device 3 5-3 which act on two sets of upper bending roll boxes 6 and one set of eleven-roll upper roll box 12 respectively. The structures of the roll gap adjusting device 1 5-1, roll gap adjusting device 2 5-2 and roll gap adjusting device 3 5-3 are the same, and the roll force of the roll gap adjusting device 3 5-3 is greater than that of the roll gap adjusting device 1 5-1 and roll gap adjusting device 2 5-2; the roll gap adjusting device 1 5-1, roll gap adjusting device 2 5-2 and roll gap adjusting device 3 5-3 are respectively composed of two roll gap adjusting cylinders 48, roll box support plates 49 and connectors 50. The roll gap adjusting cylinders 48 of the roll gap adjusting device 1 5-1 and roll gap adjusting device 2 5-2 are respectively fixed on the upper cross beam 1 41 by screws 3 51, and the roll gap adjusting cylinder 48 of the roll gap adjusting device 3 5-3 is fixed on the upper cross beam 3 43 by screws 3 51. The connectors 50 are threadedly connected to the roll gap adjusting cylinders 48, and are locked between the top heads of the connectors 50 and the roll box support plates 49 by round nuts 52. The length of the connectors 50 extending below the roll box support plates 49 is 1 mm - 2 mm. During operation, the piston rods of the roll gap adjusting cylinders 48 of the roll gap adjusting device 1 5-1, roll gap adjusting device 2 5-2 and roll gap adjusting device 3 5-3 extend, which can respectively drive two sets of upper bending roll boxes 6 and one set of eleven-roll upper roll box to move downward, making the strip produce appropriate bending and cooperating with the tensile tension to generate the required elongation. When the tension leveller is not required to be put into operation, the piston rods of the roll gap adjusting cylinders 48 retract.

[0051] There are two sets of upper bending roll boxes 6. The roll shafts of the three columns of supporting rolls 66 in the upper bending roll box 6 are installed on the roll box base 65. The rollers of the supporting rolls 66 are connected to the roll shafts through bearings. Two intermediate rolls 67 are installed on the supporting rolls 66, and one working roll 68 is installed on the two intermediate rolls 67. Rotary joints 69 are installed at both ends of the working roll 68 and the intermediate rolls 67. The rotary joints 69 are installed on the rotary joint supports 73, and the rotary joint supports 73 are fixed to the roll box base 65 by screws 74. Suspension frames 72 and bogies 70 are respectively installed at both ends of the roll box base 65, and four rollers 71 are respectively installed on the suspension frames 72 and the bogies 70; the two upper bending roll boxes 6 are respectively inverted and hung on the roll box support plates 49 of the screw down device 5-1 and the screw down device 5-2 through the four rollers 71. The bottom surfaces of the roll box bases 65 are respectively abutted against the joints 50 of the screw down device 5-1 and the screw down device 5-2; one end of the roll box base 65 is connected to the bogie 70 through a bearing, and the roll box base 65 can rotate around the rotation center of the bogie 70, which is convenient for the upper roll box traction device 137 of the roll changing device 16 to pull it out and then, through flipping, can make the supporting rolls 66, intermediate rolls 67, and working roll 68 of the upper bending roll box 6 face upward, facilitating replacement and maintenance; a pull rod pin 65-2 for cooperating with the upper roll box traction device 137 of the roll changing device 16 is installed on the connecting rod 65-1 at the other end of the roll box base 65, and the connecting rod 65-1 extends outside the housing 40 on one side of the roll changing device 16 to facilitate the connection between the upper roll box traction device 137 of the roll changing device 16 and the pull rod pin 65-2.

[0052] There are five sets of lower lifting devices 7, including lower lifting device one 7-1, lower lifting device two 7-2, lower lifting device three 7-3, lower lifting device four 7-4, and lower lifting device five 7-5 that act on two sets of lower bending roll boxes 8, one set of lower leveling roll box 9, and one set of eleven-roll lower roll box 13 respectively. The structures of lower lifting device one 7-1, lower lifting device two 7-2, lower lifting device three 7-3, lower lifting device four 7-4, and lower lifting device five 7-5 are the same. The top pressures of lower lifting device four 7-4 and lower lifting device five 7-5 acting on the eleven-roll lower roll box 13 are greater than those of lower lifting device one 7-1, lower lifting device two 7-2, and lower lifting device three 7-3. Lower lifting device one 7-1, lower lifting device two 7-2, lower lifting device three 7-3, lower lifting device four 7-4, and lower lifting device five 7-5 are respectively driven by a second reducer 53 installed on the drive side housing 40 through a constant velocity joint four 54 to drive two elevators one 55. An encoder one 56 for displaying the lifting amount of elevator one 55 is installed at the tail of the second reducer 53. A top head one 57 is installed on elevator one 55. A wear-resistant plate 58 and a transition plate 59 are installed on top head one 57. The transition plate 59 is pressed against top head one 57 through a disc spring 60 and a fifth screw 61. A spherical plain bearing 62 is installed between top head one 57 and transition plate 59. When lower lifting device four 7-4 and lower lifting device five 7-5 lift non-synchronously, the eleven-roll lower roll box 13 can automatically align to improve the stress state. The elevators one 55 of lower lifting device one 7-1, lower lifting device two 7-2, and lower lifting device three 7-3 are fixed to the first lower crossbeam 44 through screws. The elevators one 55 of lower lifting device four 7-4 and lower lifting device five 7-5 are fixed to the second lower crossbeam 45 through screws. The top head one 57 abuts against the bottom surfaces of the corresponding roll box bases of two sets of lower bending roll boxes 8, one set of lower leveling roll box 9, and one set of eleven-roll lower roll box 13. During operation, the elevators one 55 of lower lifting device one 7-1, lower lifting device two 7-2, lower lifting device three 7-3, lower lifting device four 7-4, and lower lifting device five 7-5 drive the top head one 57 to push out upwards, which can respectively drive two sets of lower bending roll boxes 8, one set of lower leveling roll box 9, and one set of eleven-roll lower roll box 13 to move upwards, causing the strip to bend appropriately and cooperate with the drawing tension to generate the required elongation. When the tension leveling machine does not need to be put into use, the elevator one 55 drives the top head one 57 to move downwards.

[0053] There are two sets of lower bending roll boxes 8. The roll shafts of the three columns of backup rolls II 77 in the lower bending roll box 8 are installed on the roll box base II 76. The rollers of the backup rolls II 77 are connected to the roll shafts through bearings. Two intermediate rolls II 78 are installed on the backup rolls II 77, and one working roll II 79 is installed on the two intermediate rolls 78. Rotary joints II 80 are installed at both ends of the working roll II 79 and the intermediate rolls II 78. The rotary joints II 80 are installed on the rotary joint supports II 81. The rotary joint supports II 81 are fixed to the roll box base II 76 by screws VI 82. Two rollers II 83 are installed on one side of the roll box base II 76. The lower bending roll box 8 is placed on the lower roll box track 75 through the two rollers II 83 and the support block I 84 on the other side of the roll box base II 76. A pin hole I 76-2 for cooperating with the lower roll box traction device 136 of the roll changing device 16 is provided on the connecting rod II 76-1 installed at one end of the roll box base II 76. The connecting rod II 76-1 extends outside the housing 40 on one side of the roll changing device 16 to facilitate the connection between the lower roll box traction device 136 of the roll changing device 16 and the pin hole I 76-2.

[0054] There is one set of lower straightening roll boxes 9. The roll shafts of the three columns of backup rolls III 86 in the lower straightening roll box 9 are installed on the roll box base III 85. The rollers of the backup rolls III 86 are connected to the roll shafts through bearings. Two intermediate rolls III 87 of the backup rolls III 86 are installed on the backup rolls III 86, and one working roll III 88 is installed on the two intermediate rolls III 87. Rotary joints III 89 are installed at both ends of the working roll III 88 and the intermediate rolls III 87. The rotary joints III 89 are installed on the rotary joint supports III 90. The rotary joint supports III 90 are fixed to the roll box base III 85 by screws VII 91. Two rollers III 92 are installed on one side of the roll box base III 85. The lower straightening roll box 9 is placed on the lower roll box track 75 through the two rollers III 92 and the support block II 93 on the other side of the roll box base III 85. A pin hole II 85-2 for cooperating with the lower roll box traction device 136 of the roll changing device 16 is provided on the connecting rod III 85-1 installed at one end of the roll box base III 85. The connecting rod III 85-1 extends outside the housing 40 on one side of the roll changing device 16 to facilitate the connection between the lower roll box traction device 136 of the roll changing device 16 and the pin hole II 85-2.

[0055] The up-and-down lifting device 10 is a set, which drives the up straightening roll box 11 to lift. The up-and-down lifting device 10 is driven by two lifters II 95 through a constant velocity joint V 96 by a speed reducer III 94 installed on the driving side housing 40. An encoder II 97 for displaying the lifting amount of the lifter II 95 is installed at the tail of the speed reducer III 94. A plug II 99 is installed on the lifter II 95. One end of the plug II 99 is threadedly connected to the lifter II 95, and the other end of the plug II 99 is fixedly connected to the up-and-down lifting device support plate 98. The length of the plug II 99 extending below the up-and-down lifting device support plate 98 is 1 mm - 2 mm. The plug II 99 abuts against the bottom surface of the roll box base IV 101 of the up straightening roll box 11. The lifter II 95 of the up-and-down lifting device 10 is fixed to the upper crossbeam II 42 by screws VIII 100. During operation, the lifter II 95 of the up-and-down lifting device 10 drives the plug II 99 to push downward, which can drive the up straightening roll box 11 to move downward to straighten the strip. When the tension leveller does not need to be put into use, the lifter II 95 drives the plug II 99 to move upward.

[0056] The up straightening roll box 11 is a set. The roll shafts of the two rows of supporting rolls IV 102 of the up straightening roll box 11 are installed on the roll box base IV 101. The rollers of the supporting rolls IV 102 are connected to the roll shafts through bearings. A working roll IV 103 is installed on the two rows of supporting rolls IV 102. Rotary joints IV 104 are installed at both ends of the working roll IV 103. The rotary joints IV 104 are installed on the rotary joint supports IV 105. The rotary joint supports IV 105 are fixed to the roll box base IV 101 by screws IX 106. Suspension brackets II 108 and bogies II 107 are respectively installed at both ends of the roll box base IV 101. Two rollers IV 109 are respectively installed on the suspension brackets II 108 and bogies II 107. The up straightening roll box 11 is hung upside down on the up-and-down lifting device support plate 98 of the up-and-down lifting device 10 through four rollers IV 109; the bottom surface of the roll box base IV 101 abuts against the plug II 99 of the up-and-down lifting device 10; one end of the roll box base IV 101 is connected to the bogie II 107 through a bearing, and the roll box base IV 101 can rotate around the rotation center of the bogie II 107; a pull rod pin II 101-2 for cooperating with the upper roll box traction device 137 of the roll changing device 16 is installed on the connecting rod IV 101-1 installed at the other end of the roll box base IV 101. The connecting rod IV 101-1 extends outside the housing 40 on one side of the roll changing device 16 to facilitate the connection between the upper roll box traction device 137 of the roll changing device 16 and the pull rod pin II 101-2.

[0057] The roll shafts of the seven columns of supporting rolls V111 of the eleven-roll upper roll box 12 are installed on the roll box base V110. The rollers of the supporting rolls V111 are connected to the roll shafts through bearings. Six intermediate rolls IV112 are installed on the supporting rolls V111, and five working rolls V113 are installed on the six intermediate rolls IV112. Rotary joints V114 are installed at both ends of the working rolls V113 and the intermediate rolls IV112. The rotary joints V114 are installed on the rotary joint supports V115, and the rotary joint supports V115 are fixed on the roll box base V110 by screws X116. Suspension brackets III119 and bogies III117 are respectively installed at both ends of the roll box base V110. Four rollers V118 are respectively installed on the suspension brackets III119 and the bogies III117. The eleven-roll upper roll box 12 is hung upside down on the roll box support plate 49 of the screw-down device III5-3 through the four rollers V118; the bottom surface of the roll box base V110 abuts against the joint 50 of the screw-down device III5-3; one end of the roll box base V110 is connected to the bogie III117 through a bearing, and the roll box base V110 can rotate around the rotation center of the bogie III117. A pull rod pin III110-2 for cooperating with the upper roll box traction device 137 of the roll changing device 16 is installed on the connecting rod V110-1 installed at the other end of the roll box base V110. The connecting rod V110-1 extends outside the housing 40 on one side of the roll changing device 16 to facilitate the connection between the upper roll box traction device 137 of the roll changing device 16 and the pull rod pin III110-2.

[0058] The roll shafts of the seven columns of supporting rolls VI121 of the eleven-roll lower roll box 13 are installed on the roll box base VI120. The rollers of the supporting rolls VI121 are connected to the roll shafts through bearings. Six intermediate rolls V122 are installed on the supporting rolls VI121, and five working rolls VI123 are installed on the six intermediate rolls V122. Rotary joints VI124 are installed at both ends of the working rolls VI123 and the intermediate rolls V122. The rotary joints VI124 are installed on the rotary joint supports VI125, and the rotary joint supports VI125 are fixed on the roll box base VI120 by screws XI126. Two rollers VI127 are installed on one side of the roll box base VI120. The eleven-roll lower roll box 13 is placed on the lower roll box track 75 through the two rollers VI127 and the support block III128 on the other side of the roll box base VI120; a pin hole III120-2 for cooperating with the lower roll box traction device 136 of the roll changing device 16 is provided on the connecting rod VI120-1 installed at one end of the roll box base VI120. The connecting rod VI120-1 extends outside the housing 40 on one side of the roll changing device 16 to facilitate the connection between the lower roll box traction device 136 of the roll changing device 16 and the pin hole III120-2.

[0059] There are multiple groups of turning rolls 14. Positioning sleeves 130 are installed at both ends of the turning roll 129, and the positioning sleeves 130 are installed in the corresponding holes of the two side housings 40 through screws XII131.

[0060] The roll-changing carriage base 134 of the roll-changing device 16 is driven by an oil cylinder 139. The roll-changing carriage base 134 is connected to the piston rod end of the oil cylinder 139 through a pin shaft 140. The cylinder barrel end of the oil cylinder 139 is installed on the oil cylinder base 138, and the oil cylinder base 138 is fixed on the ground. Two sets of flat rollers 141 and two sets of V-shaped rollers 133 that can effectively prevent the roll-changing carriage base 134 from derailing are installed on the roll-changing carriage base 134. The two sets of flat rollers 141 and the two sets of V-shaped rollers 133 are placed on two tracks 132, and the two tracks 132 are fixed on the ground. A roll-changing carriage frame 135 is installed on the roll-changing carriage base 134. Four sets of upper roll box traction devices 137 and four sets of lower roll box traction devices 136 are installed on the roll-changing carriage frame 135. After the four sets of upper roll box traction devices 137 and the four sets of lower roll box traction devices 136 are connected to the pull rod pins or pin holes of the corresponding roll boxes, all the roll boxes can be pulled out simultaneously under the driving force of the oil cylinder 139.

[0061] The rotating handle two 145 of the upper roll box traction device 137 is connected to one end of a connecting plate 147 through a connecting shaft 146. The hinge shaft of the connecting plate 147 is connected to the support one 143. The other end of the connecting plate 147 is connected to a bracket 142. The bracket 142 is slidably connected to the support one 143. The support one 143 is fixed on the roll-changing carriage frame 135 through a screw thirteen 144. The bracket 142 is provided with pin holes that cooperate with the pull rod pin one 65-2 on the roll box base one 65 of the two sets of upper bending roll boxes 6, the pull rod pin two 101-2 on the roll box base four 101 of the upper straightening roll box 11, and the pull rod pin three 110-2 on the roll box base five 110 of the eleven-roll upper roll box 12. The rotating handle one 149 is installed at one end of a stop pin 148. The other end of the stop pin 148 passes through a hole in the bracket 142. The stop pin 148 sleeved in the hole of the bracket 142 is slidably connected to the inner hole of the bracket 142. The side of the bracket 142 is provided with a hole that cooperates with the stop pin 148. When replacing the upper bending roll box 6, the upper straightening roll box 11, and the eleven-roll upper roll box 12, rotate the rotating handle two 145. Under the action of the connecting plate 147, the bracket 142 is lifted, and the pull rod pin one 65-2, the pull rod pin two 101-2, and the pull rod pin three 110-2 are smoothly inserted into the pin holes on the bracket 142. Manually lift the rotating handle one 149 to move the stop pin 148 to the right, thereby completing the stable connection between the upper bending roll box 6, the upper straightening roll box 11, the eleven-roll upper roll box 12 and the upper roll box traction device 137.

[0062] The support two 151 of the lower roll box traction device 136 is provided with a pin hole. During roll changing, a plug pin 150 is inserted into the pin hole one 76-2 on the roll box base two 76 of the two sets of lower bending roll boxes 8, the pin hole two 85-2 on the roll box base three 85 of the lower straightening roll box 9, the pin hole three 120-2 on the roll box base six 120 of the eleven-roll lower roll box 13 and the pin hole on the support two 151, thereby realizing the connection between the lower bending roll box 8, the lower straightening roll box 9, the eleven-roll lower roll box 13 and the lower roll box traction device 136.

Claims

1. An integrated combined tension leveling unit, characterized in that: The integrated combined tension leveling and bending unit includes a tension roll group (1), a main drive system for tension rolls (2), a pressure roll group (3), an integrated frame (4), a roll gap adjusting device (5), an upper bending roll box (6), a lower lifting device (7), a lower bending roll box (8), a lower leveling roll box (9), an upper lifting device (10), an upper leveling roll box (11), an eleven-roll upper roll box (12), an eleven-roll lower roll box (13), a turning roll (14), and a roll changing device (16); the tension roll group (1) is installed at the inlet and outlet of the tension leveling and bending unit. The main drive motor for the inlet tension rolls (25) transmits power to the inlet tension rolls (17) through a first reducer (28) and a gear distribution box (23). The main drive motor for the outlet tension rolls (25) transmits power to the outlet tension rolls (17) through a first reducer (28) and a gear distribution box (23). By the diameter difference of each tension roll (17), a tensile tension for the strip is established in the tension leveling section of the tension leveling and bending machine; the upper bending roll box (6), the upper leveling roll box (11), and the eleven-roll upper roll box (12) installed above the integrated frame (4), and the lower bending roll box (8), the lower leveling roll box (9), and the eleven-roll lower roll box (13) installed below the integrated frame (4) cause the strip to have an elongation rate and level the strip; the pressure roll group (3) is installed at the inlet and outlet of the tension leveling and bending unit. The cylinder (34) of the pressure roll group (3) extends, and presses the strip against the tension rolls (17) through the pressure rolls (32) to generate a bending stress on the strip; multiple turning rolls (14) for guiding the strip running are distributed inside the integrated frame (4).

2. The one-piece combined tension leveling unit according to claim 1, characterized in that: One set of the tension roll group (1) is installed at each of the inlet and outlet of the tension leveling and bending unit. Each set includes four tension rolls (17). The tension roll group (1) is installed in the mounting holes of the integrated frame (4); the tension roll group (1) includes the tension rolls (17), bearings (18) on both sides thereof, an operator side bearing block (19), and a drive side bearing block (20). The operator side bearing block (19) is connected to the integrated frame (4) by a first screw (21), and the drive side bearing block (20) is floatingly connected to the integrated frame (4).

3. The one-piece combined tension leveling unit according to claim 1, wherein: The output shaft of the gear distribution box (23) of the main drive system for tension rolls (2) is connected to the drive side shaft end of the tension roll (17) through a first constant velocity joint (22). The input shaft of the gear distribution box (23) is connected to the first reducer (28) through a third constant velocity joint (29). The gear distribution box (23) is installed on a gear box base (31), and the gear box base (31) is fixedly connected to the integrated frame (4) by bolts; the main drive motor for tension rolls (25) is connected to the first reducer (28) through a second constant velocity joint (27). The second constant velocity joint (27) is provided with a brake (26). The main drive motor (25), the first reducer (28), and the brake (26) are installed on a main drive base (30).

4. The one-piece combined tension leveling unit according to claim 1, wherein: The said pressure roll group (3) is equipped with two sets at the inlet and outlet of the stretch-bending leveling unit, and is placed below the lowermost tension roll (17); a set of cylinder seats (33) is installed at both ends of the pressure roll (32) of each pressure roll group (3), the cylinder (34) is installed on the cylinder seat (33), the cylinder seat (33) is fixed on the connecting beam one (36) through the second screw (35), the cylinder (34) drives the pressure roll frame (39) to press the pressure roll (32) on the tension roll (17), the pressure roll frame (39) is connected to the pressure roll frame support (38) through a rotary pin (37), the pressure roll frame support (38) is installed on the connecting beam one (36), and the connecting beam one (36) is connected to the two side frames (40) of the integral frame (4).

5. The one-piece combined tension leveling unit according to claim 1, wherein: The said integral frame (4) is composed of two side frames (40), upper cross beam one (41), upper cross beam two (42), upper cross beam three (43), lower cross beam one (44), lower cross beam two (45) and connecting beam two (46), and the two side frames (40) are connected into one body through screws with the upper cross beam one (41), upper cross beam two (42), upper cross beam three (43), lower cross beam one (44), lower cross beam two (45) and connecting beam two (46); both ends of the lower roll box track (75) are fixed on the two side frames (40) and extend outside the side frame (40) on one side of the roll changing device (16), and the said lower roll box track (75) is eight in number.

6. The one-piece combined tension leveling unit according to claim 1, characterized in that: The said rolling reduction device (5) has three sets, including rolling reduction device one (5-1), rolling reduction device two (5-2) and rolling reduction device three (5-3) which respectively act on two sets of upper bending roll boxes (6) and one set of eleven-roll upper roll box (12). The structures of the rolling reduction device one (5-1), rolling reduction device two (5-2) and rolling reduction device three (5-3) are the same, and the rolling reduction force of the rolling reduction device three (5-3) is greater than that of the rolling reduction device one (5-1) and the rolling reduction device two (5-2); the rolling reduction device one (5-1), rolling reduction device two (5-2) and rolling reduction device three (5-3) respectively consist of two rolling reduction oil cylinders (48), roll box support plates (49) and connectors (50). The rolling reduction oil cylinders (48) of the rolling reduction device one (5-1) and the rolling reduction device two (5-2) are respectively fixed on the upper cross beam one (41) through the third screw (51), the rolling reduction oil cylinder (48) of the rolling reduction device three (5-3) is fixed on the upper cross beam three (43) through the third screw (51), the connector (50) is threadedly connected with the rolling reduction oil cylinder (48), and a round nut (52) is used to lock between the head of the connector (50) and the roll box support plate (49). The length that the connector (50) extends below the roll box support plate (49) is 1 mm - 2 mm.

7. An integrated combined tension levelling unit according to claim 1, characterized in that: There are two sets of the upper bending roll boxes (6). The roll shafts of the three rows of supporting rolls I (66) of the upper bending roll boxes (6) are installed on the roll box base I (65). The rollers of the supporting rolls I (66) are connected to the roll shafts through bearings. Two intermediate rolls I (67) are installed on the supporting rolls I (66), and one working roll I (68) is installed on the two intermediate rolls I (67). Rotary joints I (69) are installed at both ends of the working roll I (68) and the intermediate rolls I (67). The rotary joints I (69) are installed on the rotary joint supports I (73). The rotary joint supports I (73) are fixed on the roll box base I (65) by screws IV (74). Suspension frames I (72) and bogies I (70) are respectively installed at both ends of the roll box base I (65). Four rollers I (71) are respectively installed on the suspension frames I (72) and the bogies I (70); the two upper bending roll boxes (6) are respectively inverted and hung on the roll box supporting plates (49) of the screw down device I (5-1) and the screw down device II (5-2) through the four rollers I (71). The bottom surfaces of the roll box base I (65) are respectively abutted against the joints (50) of the screw down device I (5-1) and the screw down device II (5-2); one end of the roll box base I (65) is connected to the bogie I (70) through a bearing. The roll box base I (65) can rotate around the rotation center of the bogie I (70). A pull rod pin I (65-2) for cooperating with the upper roll box traction device (137) of the roll changing device (16) is installed on the connecting rod I (65-1) installed at the other end of the roll box base I (65). The connecting rod I (65-1) extends outside the housing (40) on one side of the roll changing device (16).

8. The one-piece combined tension levelling unit according to claim 1, wherein: There are five sets of the lower lifting devices (7), including the lower lifting device one (7-1), the lower lifting device two (7-2), the lower lifting device three (7-3), the lower lifting device four (7-4), and the lower lifting device five (7-5) which act on two sets of lower bending roll boxes (8), one set of lower leveling roll box (9), and one set of eleven-roll lower roll box (13) respectively. The structures of the lower lifting device one (7-1), the lower lifting device two (7-2), the lower lifting device three (7-3), the lower lifting device four (7-4), and the lower lifting device five (7-5) are the same. The top pressures of the lower lifting device four (7-4) and the lower lifting device five (7-5) are greater than those of the lower lifting device one (7-1), the lower lifting device two (7-2), and the lower lifting device three (7-3). The lower lifting device one (7-1), the lower lifting device two (7-2), the lower lifting device three (7-3), the lower lifting device four (7-4), and the lower lifting device five (7-5) respectively drive two elevators one (55) through a constant velocity joint four (54) by a speed reducer two (53) installed on the drive side housing (40). An encoder one (56) for displaying the lifting amount of the elevator one (55) is installed at the tail of the speed reducer two (53). A plug one (57) is installed on the elevator one (55). A wear-resistant plate (58) and a transition plate (59) are installed on the plug one (57). The transition plate (59) is pressed against the plug one (57) through a disc spring (60) and a screw five (61). A spherical plain bearing (62) is installed between the plug one (57) and the transition plate (59). The elevators one (55) of the lower lifting device one (7-1), the lower lifting device two (7-2), and the lower lifting device three (7-3) are fixed to the lower crossbeam one (44) by screws. The elevators one (55) of the lower lifting device four (7-4) and the lower lifting device five (7-5) are fixed to the lower crossbeam two (45) by screws. The plug one (57) abuts against the bottom surfaces of the corresponding roll box bases of two sets of lower bending roll boxes (8), one set of lower leveling roll box (9), and one set of eleven-roll lower roll box (13).

9. The one-piece combined tension leveling unit according to claim 1, characterized in that: There are two sets of the lower bending roll boxes (8). The roll shafts of the three rows of backup rolls II (77) of the lower bending roll boxes (8) are installed on the roll box base II (76). The rolls of the backup rolls II (77) are connected to the roll shafts through bearings. Two intermediate rolls II (78) are installed on the backup rolls II (77), and one working roll II (79) is installed on the two intermediate rolls (78). Rotary joints II (80) are installed at both ends of the working roll II (79) and the intermediate rolls II (78). The rotary joints II (80) are installed on the rotary joint supports II (81). The rotary joint supports II (81) are fixed to the roll box base II (76) by screws VI (82). Two rollers II (83) are installed on one side of the roll box base II (76). The lower bending roll boxes (8) are placed on the lower roll box track (75) through the two rollers II (83) and the support block I (84) on the other side of the roll box base II (76); a pin hole I (76-2) for cooperating with the lower roll box traction device (136) of the roll changing device (16) is provided on the connecting rod II (76-1) installed at one end of the roll box base II (76), and the connecting rod II (76-1) extends outside the housing (40) on one side of the roll changing device (16).

10. The one-piece combined tension leveller according to claim 1, characterized in that: There is one set of the lower straightening roll boxes (9). The roll shafts of the three rows of backup rolls III (86) of the lower straightening roll boxes (9) are installed on the roll box base III (85). The rolls of the backup rolls III (86) are connected to the roll shafts through bearings. Two intermediate rolls III (87) of the backup rolls III (86) are installed on the backup rolls III (86), and one working roll III (88) is installed on the two intermediate rolls III (87). Rotary joints III (89) are installed at both ends of the working roll III (88) and the intermediate rolls III (87). The rotary joints III (89) are installed on the rotary joint supports III (90). The rotary joint supports III (90) are fixed to the roll box base III (85) by screws VII (91). Two rollers III (92) are installed on one side of the roll box base III (85). The lower straightening roll boxes (9) are placed on the lower roll box track (75) through the two rollers III (92) and the support block II (93) on the other side of the roll box base III (85); a pin hole II (85-2) for cooperating with the lower roll box traction device (136) of the roll changing device (16) is provided on the connecting rod III (85-1) installed at one end of the roll box base III (85), and the connecting rod III (85-1) extends outside the housing (40) on one side of the roll changing device (16).

11. The one-piece combined tension leveling unit according to claim 1, wherein: The said upper lifting device (10) is a set, which drives the upper straightening roll box (11) to lift. The upper lifting device (10) is driven by a third reducer (94) installed on the driving side housing (40) through a constant velocity joint five (96) to drive two second elevators (95). An encoder two (97) for displaying the lifting amount of the second elevator (95) is installed at the tail of the third reducer (94). A second plug (99) is installed on the second elevator (95). One end of the second plug (99) is threadedly connected to the second elevator (95), and the other end of the second plug (99) is connected and fixed to the upper lifting device support plate (98). The length that the second plug (99) extends below the upper lifting device support plate (98) is 1 mm - 2 mm. The second plug (99) abuts against the bottom surface of the roll box base four (101) of the upper straightening roll box (11). The second elevator (95) of the upper lifting device (10) is fixed to the second upper crossbeam (42) by screws eight (100).

12. The one-piece combined tension leveling unit according to claim 1, characterized in that: The said upper straightening roll box (11) is a set. The roll shafts of two columns of fourth supporting rolls (102) of the upper straightening roll box (11) are installed on the roll box base four (101). The rollers of the fourth supporting rolls (102) are connected to the roll shafts through bearings. A fourth working roll (103) is installed on two columns of fourth supporting rolls (102). Rotary joints four (104) are installed at both ends of the fourth working roll (103). The rotary joints four (104) are installed on the rotary joint supports four (105). The rotary joint supports four (105) are fixed to the roll box base four (101) by screws nine (106). Suspension frames two (108) and bogies two (107) are respectively installed at both ends of the roll box base four (101). Four fourth rollers (109) are respectively installed on the suspension frames two (108) and bogies two (107). The upper straightening roll box (11) is hung upside down on the upper lifting device support plate (98) of the upper lifting device (10) through four fourth rollers (109). The bottom surface of the roll box base four (101) abuts against the second plug (99) of the upper lifting device (10). One end of the roll box base four (101) is connected to the bogie two (107) through a bearing, and the roll box base four (101) can rotate around the rotation center of the bogie two (107). A pull rod pin two (101 - 2) for cooperating with the upper roll box traction device (137) of the roll changing device (16) is installed on the connecting rod four (101 - 1) installed at the other end of the roll box base four (101). The connecting rod four (101 - 1) extends outside the housing (40) on one side of the roll changing device (16).

13. The one-piece combined tension leveling unit according to claim 1, wherein: The roll shafts of the seven columns of supporting rolls five (111) of the eleven-roll upper roll box (12) are installed on the roll box base five (110). The rolls of the supporting rolls five (111) are connected to the roll shafts through bearings. Six intermediate rolls four (112) are installed on the supporting rolls five (111), and five working rolls five (113) are installed on the six intermediate rolls four (112). Rotary joints five (114) are installed at both ends of the working rolls five (113) and the intermediate rolls four (112). The rotary joints five (114) are installed on the rotary joint supports five (115). The rotary joint supports five (115) are fixed to the roll box base five (110) by screws ten (116). Suspension brackets three (119) and bogies three (117) are respectively installed at both ends of the roll box base five (110). Four rollers five (118) are respectively installed on the suspension brackets three (119) and the bogies three (117). The eleven-roll upper roll box (12) is inverted and hung on the roll box support plate (49) of the screw down device three (5-3) through the four rollers five (118); the bottom surface of the roll box base five (110) abuts against the joint (50) of the screw down device three (5-3); one end of the roll box base five (110) is connected to the bogie three (117) through a bearing. The roll box base five (110) can rotate around the rotation center of the bogie three (117). A pull rod pin three (110-2) for cooperating with the upper roll box traction device (137) of the roll changing device (16) is installed on the connecting rod five (110-1) installed at the other end of the roll box base five (110). The connecting rod five (110-1) extends outside the housing (40) on one side of the roll changing device (16).

14. The one-piece combined tension leveling unit according to claim 1, characterized in that: The roll shafts of the seven columns of supporting rolls six (121) of the eleven-roll lower roll box (13) are installed on the roll box base six (120). The rolls of the supporting rolls six (121) are connected to the roll shafts through bearings. Six intermediate rolls five (122) are installed on the supporting rolls six (121), and five working rolls six (123) are installed on the six intermediate rolls five (122). Rotary joints six (124) are installed at both ends of the working rolls six (123) and the intermediate rolls five (122). The rotary joints six (124) are installed on the rotary joint supports six (125). The rotary joint supports six (125) are fixed to the roll box base six (120) by screws eleven (126). Two rollers six (127) are installed on one side of the roll box base six (120). The eleven-roll lower roll box (13) is placed on the lower roll box track (75) through the two rollers six (127) and the support block three (128) on the other side of the roll box base six (120); a pin hole three (120-2) for cooperating with the lower roll box traction device (136) of the roll changing device (16) is provided on the connecting rod six (120-1) installed at one end of the roll box base six (120). The connecting rod six (120-1) extends outside the housing (40) on one side of the roll changing device (16).

15. The one-piece combined tension leveling unit according to claim 1, characterized in that: The steering rollers (14) are in multiple groups. Positioning sleeves (130) are installed at both ends of the steering roller (129), and the positioning sleeves (130) are installed in corresponding holes of the two side frames (40) through the twelfth screw (131).

16. The one-piece combined tension leveling unit according to claim 1, characterized in that: The roll changing trolley base (134) of the roll changing device (16) is driven by an oil cylinder (139). The roll changing trolley base (134) is connected to the piston rod end of the oil cylinder (139) through a pin shaft (140). The cylinder barrel end of the oil cylinder (139) is installed on the oil cylinder base (138), and the oil cylinder base (138) is fixed on the ground. Two sets of flat rollers (141) and two sets of V-shaped rollers (133) that can effectively prevent the roll changing trolley base (134) from derailing are installed on the roll changing trolley base (134). The two sets of flat rollers (141) and the two sets of V-shaped rollers (133) are placed on two tracks (132), and the two tracks (132) are fixed on the ground. A roll changing vehicle frame (135) is installed on the roll changing trolley base (134), and four sets of upper roll box traction devices (137) and four sets of lower roll box traction devices (136) are installed on the roll changing vehicle frame (135). After the four sets of upper roll box traction devices (137) and the four sets of lower roll box traction devices (136) are connected to the pull rod pins or pin holes of the corresponding roll boxes, all the roll boxes can be pulled out simultaneously under the driving force of the oil cylinder (139).

17. The one-piece combined tension leveling unit according to claim 1, characterized in that: The rotating handle two (145) of the upper roll box traction device (137) of the roll changing device (16) is connected to one end of a connecting plate (147) through a connecting shaft (146). The hinge shaft of the connecting plate (147) is connected to the first support (143). The other end of the connecting plate (147) is connected to a bracket (142). The bracket (142) is slidably connected to the first support (143). The first support (143) is fixed on the roll changing vehicle frame (135) through the thirteenth screw (144). The bracket (142) is provided with pin holes that cooperate with the first pull rod pin (65-2) on the first roll box base (65) of the two sets of upper bending roll boxes (6), the second pull rod pin (101-2) on the fourth roll box base (101) of the upper straightening roll box (11), and the third pull rod pin (110-2) on the fifth roll box base (110) of the eleven-roll upper roll box (12). The rotating handle one (149) is installed at one end of a retaining pin (148), and the other end of the retaining pin (148) penetrates into the hole of the bracket (142). The retaining pin (148) sleeved in the hole of the bracket (142) is slidably connected to the inner hole of the bracket (142). The side of the bracket (142) is provided with a hole that cooperates with the retaining pin (148). The second support (151) of the lower roll box traction device (136) is provided with a pin hole. During roll changing, a plug pin (150) is inserted into the first pin hole (76-2) on the second roll box base (76) of the two sets of lower bending roll boxes (8), the second pin hole (85-2) on the third roll box base (85) of the lower straightening roll box (9), and the third pin hole (120-2) on the sixth roll box base (120) of the eleven-roll lower roll box (13) and the pin hole on the second support (151).

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