A special lifting appliance for ten-roller straightening machine and its using method

Abstract

The application provides a special lifting appliance for a ten-roller straightening machine and a use method. The lifting appliance comprises a bearing crossbeam and a lifting arm. The bearing crossbeam is provided with an ear at the top and is connected with a lifting device through the ear. The lifting arm is detachably arranged at one end of the bearing crossbeam and has an insertion end and is detachably connected with a bearing seat through the insertion end. The outer dimension of the insertion end is smaller than the inner dimension of a reserved hole on the bearing seat. The insertion end of the lifting arm can be inserted into the reserved hole of the bearing seat in a horizontal direction from the outside of the straightening roller assembly, the problem that a conventional lifting appliance cannot be inserted into a hook from above due to the narrow vertical gap inside the rack is solved, and safe and reliable lifting of the straightening roller assembly in a limited space is realized.

Description

Technical Field

[0001] This application belongs to the technical field of roll hoisting equipment, specifically relating to a special hoisting tool for a ten-roll straightener and its usage method. Background Technology

[0002] The ten-roll straightening machine is a key piece of equipment used to straighten round steel, shaped steel and other profiles. Its core component is a set of straightening rolls. The straightening rolls are subjected to high-pressure rolling and friction for a long time, and their surfaces will wear out. Therefore, they need to be disassembled regularly for repair or replacement.

[0003] However, inside the frame of the ten-roll straightener, the vertical gap between the straightening rollers, bearing housings and the frame is extremely narrow. Conventional lifting tools such as hooks and slings cannot be directly extended from above to the bearing housing for vertical lifting, making the lifting operation difficult to carry out. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this application is to provide a special lifting tool and method for a ten-roll straightener, which can reliably connect to the bearing seat from the outside of the straightening roller assembly in the horizontal direction, thereby completing the lifting of the straightening roller assembly.

[0005] To address the aforementioned issues, the first aspect of this application provides a special lifting device for a ten-roller straightener, used for lifting a straightening roller assembly inside the straightener frame. The straightening roller assembly includes a straightening roller body and bearing seats connecting its two ends. The lifting device includes: a load-bearing beam and a lifting arm; the load-bearing beam is provided with lifting lugs and is connected to lifting equipment through the lifting lugs; the lifting arm is connected to the load-bearing beam, and the lifting arm has an insertion end and is detachably connected to the bearing seat through the insertion end; wherein, the outer dimension of the insertion end is smaller than the inner dimension of the reserved hole on the bearing seat.

[0006] Optionally, at least two lifting lugs are provided, and they are respectively provided at both ends of the load-bearing crossbeam; wherein, the lifting lug near the lifting arm has two hanging lug plates respectively provided on both sides of the axial direction of the load-bearing crossbeam, the bottom of the hanging lug plates is fixedly connected to the load-bearing crossbeam, and a reinforcing rib is provided between the hanging lug plates and the load-bearing crossbeam; the lifting lug away from the lifting arm is provided at the top of the load-bearing crossbeam, and a lifting hole is provided thereon.

[0007] Optionally, the supporting beam is provided with a plurality of fixing points arranged at intervals along the axial direction, and the lifting arm is provided with connecting holes; wherein, fasteners are inserted through the connecting holes and any fixing point to lock the lifting arm at the corresponding extension length.

[0008] Optionally, a fixed central axis is provided between the lifting arm and the load-bearing beam, and the lifting arm is pivotally connected to the load-bearing beam through the fixed central axis.

[0009] Optionally, the end of the supporting beam is provided with an arc-shaped guide groove, and the lifting arm is provided with a locking pin. The locking pin passes through the arc-shaped guide groove and can slide along the arc-shaped guide groove to lock the lifting arm at the corresponding rotation angle.

[0010] Optionally, a pressure plate is also included, wherein the pressure plate has several through holes and the bearing seat has several threaded holes; wherein, after the lifting arm is inserted into the reserved hole of the bearing seat, the pressure plate presses against the lifting arm, and the screw passes through the through hole and is screwed into the corresponding threaded hole to fix the lifting arm to the bearing seat.

[0011] Optionally, it also includes a claw, the top of which is provided with a matching hole, and the bottom of the lifting arm is provided with a connecting plate, the connecting plate having multiple bolt holes, the bolts passing through the matching hole and connecting bolt holes to detachably fix the claw to the lifting arm; The claw has a U-shaped opening, and the opening of the U-shaped opening faces the same direction as the extension of the insertion end.

[0012] Optionally, it also includes a counterweight mechanism; the counterweight mechanism is disposed on the load-bearing beam and includes a counterweight block and an adjustable chain, the counterweight block is disposed at the end of the load-bearing beam away from the lifting arm, and at least two lifting lugs are respectively disposed at both ends of the top of the load-bearing beam; The adjustable chain is connected to at least two of the lifting lugs and is configured to adjust the center of gravity of the lifting device by adjusting the length of the chain connected to the corresponding lifting lug.

[0013] Optionally, the front end of the insertion end is provided with a guide slope or a gradually widening opening.

[0014] The second aspect of this application provides a method for using a special lifting device for a ten-roller straightener, employing the special lifting device for a ten-roller straightener as described above, the method comprising: The lifting device is connected to the lifting lugs and moved above the ten-roll straightener so that the insertion end of the lifting arm is aligned with the reserved hole on the bearing seat. Insert the insertion end into the reserved hole in the horizontal direction and fix the lifting arm to the bearing seat; Operate the lifting equipment to lift the straightening roller assembly smoothly off the frame.

[0015] Beneficial effects The embodiments of the present invention provide a special lifting tool and method for a ten-roll straightener. By setting a bearing beam and a lifting arm, and making the outer dimension of the insertion end of the lifting arm smaller than the inner dimension of the reserved hole in the bearing seat, it is possible to insert the straightener assembly into the reserved hole in the bearing seat horizontally from the outside. This solves the problem that conventional lifting tools cannot be extended from above to the bearing seat for vertical lifting due to the narrow vertical gap inside the frame, and realizes the lifting of the straightener assembly in a confined space.

[0016] During hoisting operations, the connection can be completed simply by aligning the insertion end of the hoisting arm with the reserved hole on the bearing seat, pushing it in horizontally and fixing it. This shortens the time of a single hoisting operation, thereby improving disassembly and maintenance efficiency and enabling the replacement of the straightening roller to be completed in a shorter downtime. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the ten-roller straightener according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a special lifting device for a ten-roller straightener according to an embodiment of this application. Figure 1 ; Figure 3 This is a schematic diagram of the structure of a special lifting device for a ten-roller straightener according to an embodiment of this application. Figure 2 ; Figure 4 This is a schematic diagram of the load-bearing crossbeam according to an embodiment of this application; Figure 5 This is a schematic diagram illustrating the rotation angle adjustment of the special lifting device for the ten-roller straightener according to an embodiment of this application. Figure 6 This is a schematic diagram illustrating the center of gravity adjustment of the special lifting device for the ten-roller straightener according to an embodiment of this application; Figure 7 This is a schematic diagram of the lifting arm and chuck in an embodiment of this application.

[0018] The reference numerals in the attached figures are as follows: 1. Load-bearing crossbeam; 11. Lifting lug; 12. Fixing point; 13. Arc-shaped guide groove; 2. Lifting arm; 21. Insertion end; 22. Connecting hole; 23. Locking pin; 3. Counterweight mechanism; 31. Counterweight block; 32. Adjustable chain; 4. Fixed central shaft; 5. Pressure plate; 6. Claw; 10. Straightening roller assembly; 101. Straightening roller body; 102. Bearing seat; 103. Reserved hole. Detailed Implementation

[0019] In the description of this application, 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", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 limiting the present invention.

[0020] Furthermore, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] like Figures 1 to 7 As shown, according to an embodiment of this application, a special lifting tool for a ten-roller straightener is provided for lifting a straightening roller assembly 10 inside the straightener frame. The straightening roller assembly 10 includes a straightening roller body 101 and bearing seats 102 connecting its two ends.

[0024] The lifting device includes a load-bearing beam 1 and a lifting arm 2. The load-bearing beam 1 is provided with lifting lugs 11 and is connected to lifting equipment through the lifting lugs 11. The lifting arm 2 is connected to the load-bearing beam 1 and has an insertion end 21. The outer dimension of the insertion end 21 is smaller than the inner dimension of the reserved hole 103 on the bearing seat 102, so that the bearing seat 102 can be detachably connected through the insertion end 21.

[0025] By setting the insertion end 21, the lifting arm 2 can be inserted horizontally into the reserved hole 103 from the outer side of the end of the straightening roller assembly 10 in the horizontal direction. This solves the problem that conventional lifting tools cannot be extended from above for vertical lifting due to the narrow vertical gap inside the frame, and realizes the lifting of the straightening roller assembly 10 in a confined space.

[0026] The load-bearing beam 1 is the main load-bearing structure of the lifting device, and a lifting lug 11 is provided on its top. The lifting lug 11 is connected to the hook or sling of the lifting equipment. The lifting arm 2 is detachably connected to the load-bearing beam 1, and the end of the lifting arm 2 is the insertion end 21. The insertion end 21 is inserted horizontally into the reserved hole 103 on the bearing seat 102 to form a load-bearing fit.

[0027] In one embodiment, such as Figures 2 to 4 As shown, at least two lifting lugs 11 are provided, and they are respectively provided at both ends of the supporting crossbeam 1. Among them, the lifting lug 11 near the lifting arm 2 has two hanging ear plates respectively provided on both sides of the axial direction of the supporting crossbeam 1. The bottom of the hanging ear plate is fixedly connected to the supporting crossbeam 1, and a reinforcing rib is provided between the hanging ear plate and the supporting crossbeam 1. The lifting lug 11 away from the lifting arm 2 is provided on the top of the supporting crossbeam 1, and a lifting hole is provided on it.

[0028] The lifting lugs 11 at both ends provide multiple lifting connection points for the lifting equipment, facilitating the selection of lifting points according to actual working conditions. The lifting lug 11 near the lifting arm 2 has two hanging plates positioned on either side of the load-bearing beam 1 along its axial direction, ensuring even distribution of lifting force along both sides of the load-bearing beam 1. The reinforcing ribs further enhance the structural strength at the connection between the hanging plates and the load-bearing beam 1. The lifting lug 11 furthest from the lifting arm 2 has a lifting hole for direct connection to the hook of the lifting equipment.

[0029] In one specific embodiment, there are two lifting lugs 11. One lug is located at the end of the supporting beam 1 near the lifting arm 2 and includes two hanging plates. The two hanging plates are respectively fixed to the two axial sides of the supporting beam 1. The bottom of the hanging plate is welded to the supporting beam 1, and a triangular reinforcing rib is welded at the angle between the hanging plate and the supporting beam 1. The other lifting lug 11 is located at the top of the end of the supporting beam 1 away from the lifting arm 2. This lifting lug 11 is a vertically erected lifting plate structure with a circular lifting hole.

[0030] like Figure 4 and Figure 7 As shown, the supporting beam 1 is provided with multiple fixed points 12 arranged at intervals along the axial direction, and the lifting arm 2 is provided with connecting holes 22; wherein, fasteners are inserted through the connecting holes 22 and any fixed point 12 to lock the lifting arm 2 at the corresponding extension length.

[0031] By setting multiple axially spaced fixing points 12 on the load-bearing beam 1, and cooperating with the connecting holes 22 on the lifting arm 2, the operator can insert fasteners into different fixing points 12 according to the length specifications of the straightening roller assembly 10 to be lifted and the site space conditions, so as to realize the multi-level adjustable extension length of the lifting arm 2. Then, the fasteners are locked and fixed to ensure that the lifting arm 2 will not move axially during the lifting process, thus ensuring the lifting safety.

[0032] The supporting beam 1 has a row of equally spaced fixing points 12 along its axial direction, and each fixing point 12 is a through hole penetrating the supporting beam 1. The lifting arm 2 has corresponding connecting holes 22, which are also through holes. When the lifting arm 2 slides to the required extension length, the connecting hole 22 aligns with the corresponding fixing point 12. Specifically, fasteners can be bolts and nuts. The bolts pass through the connecting holes 22 and the fixing points 12, and the nuts are screwed into the bolt ends to lock them in place, thus fixing the lifting arm 2 to the supporting beam 1.

[0033] In one embodiment, such as Figures 2 to 5 As shown, a fixed central shaft 4 is provided between the lifting arm 2 and the load-bearing beam 1, and the lifting arm 2 is pivotally connected to the load-bearing beam 1 through the fixed central shaft 4.

[0034] By fixing the central axis 4, the lifting arm 2 can rotate around the fixed central axis, thereby adjusting the spatial posture of the insertion end 21 to adapt to the insertion requirements at different angles under limited on-site space conditions, thus improving the adaptability of the lifting device to complex working conditions.

[0035] The fixed central shaft 4 is vertically inserted through the end of the supporting crossbeam 1 and the connecting end of the lifting arm 2. The connecting end of the lifting arm 2 has a shaft hole that matches the fixed central shaft 4, and the fixed central shaft 4 passes through the shaft hole, allowing the lifting arm 2 to rotate around the fixed central shaft 4. Shoulders or retaining rings are respectively provided at the upper and lower ends of the fixed central shaft 4 to restrict the axial movement of the fixed central shaft 4.

[0036] Furthermore, the end of the supporting beam 1 is provided with an arc-shaped guide groove 13, and the lifting arm 2 is provided with a locking pin 23. The locking pin 23 passes through the arc-shaped guide groove 13 and can slide along the arc-shaped guide groove 13 to lock the lifting arm 2 at the corresponding rotation angle.

[0037] The arc-shaped guide groove 13 and the locking pin 23 cooperate to provide an angle limit and locking structure for the rotation of the lifting arm 2 around the fixed central axis 4. The sliding range of the locking pin 23 within the arc-shaped guide groove 13 limits the maximum rotation angle of the lifting arm 2, preventing overtravel. When the lifting arm 2 rotates to the required angle, the locking pin 23 can be locked within the arc-shaped guide groove 13, fixing the lifting arm 2 at that angle, preventing angle deflection during lifting, and ensuring stable lifting posture.

[0038] The arc-shaped guide groove 13 is formed on the upper surface of the end of the supporting crossbeam 1, and the center of the arc of the arc-shaped guide groove 13 coincides with the axis of the fixed central shaft 4. The locking pin 23 is fixed at the corresponding position on the lifting arm 2, and the upper end of the locking pin 23 passes into the arc-shaped guide groove 13. The locking pin 23 is provided with a threaded section and a locking nut. When the lifting arm 2 rotates to the required angle, the locking nut is tightened, so that the locking pin 23 and the groove wall of the arc-shaped guide groove 13 generate a frictional locking force, fixing the lifting arm 2 at the current angle.

[0039] In one embodiment, the lifting device further includes a pressure plate 5, which has several through holes, and the bearing seat 102 has several threaded holes. After the lifting arm 2 is inserted into the reserved hole 103 of the bearing seat 102, the pressure plate 5 presses against the lifting arm 2, and the bolts pass through the through holes and are screwed into the corresponding threaded holes to fix the lifting arm 2 to the bearing seat 102.

[0040] By setting up a pressure plate 5, after the insertion end 21 of the lifting arm 2 is inserted into the reserved hole 103 of the bearing seat 102, the pressure plate 5 is pressed onto the lifting arm 2, and the pressure plate 5 is locked and fixed to the bearing seat 102 by bolts, so that the lifting arm 2 is pressed tightly onto the bearing seat 102 by the pressure plate 5, which effectively prevents the lifting arm 2 from slipping out of the reserved hole 103 during the lifting process, and improves the safety and reliability of the lifting operation.

[0041] In one specific embodiment, the pressure plate 5 is a straight plate structure with multiple through holes. The number and position of the through holes correspond to the pre-set threaded holes on the bearing seat 102. After the insertion end 21 is inserted into the reserved hole 103, the pressure plate 5 is placed on the upper surface of the lifting arm 2, so that the through holes on the pressure plate 5 are aligned with the threaded holes on the bearing seat 102. The bolt passes through the through hole and is screwed into the threaded hole. By tightening the bolt, the lower surface of the pressure plate 5 is pressed against the upper surface of the lifting arm 2, thereby fixing the lifting arm 2 and the bearing seat 102 into one unit.

[0042] In one embodiment, such as Figure 7 As shown, the lifting device also includes a claw 6, the top of which is provided with a matching hole, and the bottom of the lifting arm 2 is provided with a connecting plate. The connecting plate is provided with multiple bolt holes, and the bolts pass through the matching hole and the connecting bolt holes to detachably fix the claw 6 to the lifting arm 2. The claw 6 has a U-shaped opening, and the opening of the U-shaped opening faces the same direction as the extension direction of the insertion end 21.

[0043] The detachable jaws 6 structure expand the adaptability of the lifting device to different lifting conditions. When the bearing housing 102 does not have a pre-drilled hole 103, or when it is necessary to directly engage the straightening roller head, the jaws 6 can be installed at the bottom of the lifting arm 2. Their U-shaped openings can be used to horizontally engage the corresponding lifting parts on the straightening roller head or bearing housing, achieving reliable suspension. The jaws 6 and the lifting arm 2 are detachably connected by bolts, facilitating quick assembly and disassembly according to actual needs.

[0044] In one specific embodiment, the claw 6 has an overall U-shaped structure, with its opening direction aligned with the extension direction of the insertion end 21. The top of the claw 6 has a matching hole, and a connecting plate is fixed to the corresponding position at the bottom of the lifting arm 2. The connecting plate has bolt holes that correspond one-to-one with the matching hole. During installation, the matching hole of the claw 6 is aligned with the bolt holes on the connecting plate, and the bolt passes through the matching hole and is screwed into the bolt hole to lock the claw 6 to the bottom of the lifting arm 2. During disassembly, the bolt is unscrewed to remove the claw 6, restoring the lifting arm 2 to its original insertion end's usable state.

[0045] In one embodiment, such as Figure 6 As shown, the lifting device also includes a counterweight mechanism 3, which is mounted on the load-bearing beam 1. The counterweight mechanism 3 includes a counterweight block 31 and an adjustable chain 32. The counterweight block 31 is located at the end of the load-bearing beam 1 furthest from the lifting arm 2. The adjustable chain 32 is connected to at least two lifting lugs 11 and is configured to adjust the center of gravity of the lifting device by adjusting the length of the chain connected to the corresponding lifting lug 11.

[0046] By setting up the counterweight mechanism 3, the load-bearing beam 1 can be kept in a horizontal and balanced state during the hoisting process according to the actual center of gravity position of the straightening roller assembly 10 being hoisted, preventing the lifting device from tilting due to the shift of the center of gravity, and avoiding collision between the straightening roller assembly 10 and the frame during the hoisting process, thus effectively protecting the equipment and the workpiece.

[0047] In one specific embodiment, the counterweight 31 is one or more stackable metal blocks suspended on an adjustable chain 32. Two lifting lugs 11 are connected to each end of the adjustable chain 32, and the counterweight 31 is suspended on the side of the adjustable chain 32 closest to the lifting lug 11 furthest from the end of the lifting arm 2. By changing the position of the connecting links between the adjustable chain 32 and the corresponding lifting lug 11, the suspension height and torque of the counterweight 31 relative to the supporting beam 1 are adjusted until the supporting beam 1 reaches a horizontal equilibrium state.

[0048] In one specific embodiment, the front end of the insertion end 21 is provided with a guide slope or a gradually expanding opening. By providing a guide slope or a gradually expanding opening at the front end of the insertion end 21, when it is inserted into the reserved hole 103, the guide slope or gradually expanding opening can form a sliding guiding fit with the edge of the reserved hole 103. Even if there is a certain alignment deviation between the insertion end 21 and the reserved hole 103 in the initial position, automatic alignment can be achieved through the guiding effect of the guide slope or gradually expanding opening.

[0049] The guide slope is an inclined cutting surface located on the upper and lower surfaces or left and right sides of the front end of the insertion end 21, making the front cross-sectional dimension of the insertion end 21 smaller than the rear cross-sectional dimension. The flared opening is a trumpet-shaped flared structure located at the front end of the insertion end 21, with its outer diameter gradually increasing from front to back, which also serves as a guide and centering mechanism.

[0050] The embodiments of this application also provide a method for using a special lifting tool for a ten-roller straightener. The method, employing the special lifting tool for a ten-roller straightener described in the above embodiments, includes: By connecting the lifting equipment through the lifting lug 11, the lifting device is moved above the ten-roll straightener so that the insertion end 21 of the lifting arm 2 is aligned with the reserved hole 103 on the bearing seat 102. Insert the insertion end 21 into the reserved hole 103 in the horizontal direction, and fix the lifting arm 2 on the bearing seat 102; Operate the lifting equipment to lift the straightening roller assembly 10 off the frame smoothly.

[0051] Specifically, in use, first, according to the length specifications of the straightening roller assembly 10 to be hoisted and the site space conditions, slide the hoisting arm 2 along the axial direction of the bearing beam 1 to the appropriate position, align the connecting hole 22 with the corresponding fixing point 12, insert the bolt and tighten it to complete the adjustment of the extension length of the hoisting arm 2. If the site space is limited, the locking pin 23 can be loosened, allowing the hoisting arm 2 to rotate around the fixed central axis 4 to an appropriate angle and then re-locked to adjust the spatial posture of the insertion end 21.

[0052] Then, based on the actual center of gravity position of the straightening roller assembly 10, the position of the connecting link between the adjustable chain 32 and the lifting lug 11 is adjusted to change the suspension height of the counterweight 31, so that the load-bearing beam 1 achieves horizontal balance in the suspended state.

[0053] Operate the lifting equipment to move the lifting device above the ten-roll straightener, aligning the insertion end 21 of the lifting arm 2 with the pre-drilled hole 103 on the bearing housing 102. Using the guide ramp or flaring end at the front end of the insertion end 21, insert the insertion end 21 horizontally into the pre-drilled hole 103. After insertion, press the pressure plate 5 onto the upper surface of the lifting arm 2, aligning the through hole on the pressure plate 5 with the threaded hole on the bearing housing 102. Insert bolts and tighten them to securely connect the lifting arm 2 to the bearing housing 102.

[0054] After confirming that all connections are secure, operate the lifting equipment to lift the straightening roller assembly 10 smoothly from the frame and move it horizontally to the designated storage position. The disassembly of the lifting device can be completed by reversing the operation.

[0055] If the object to be hoisted cannot be connected using the reserved hole 103 in the bearing housing, the chuck 6 can be bolted to the bottom of the hoisting arm 2, and the U-shaped opening of the chuck 6 can be used to engage with the corresponding hoisting part on the straightening roller head or bearing housing to complete the hoisting operation.

[0056] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A special lifting tool for a ten-roller straightener, characterized in that, For hoisting a straightening roller assembly (10) inside a straightening frame, the straightening roller assembly (10) includes a straightening roller body (101) and bearing seats (102) connecting its two ends; The lifting device includes: a load-bearing beam (1) and a lifting arm (2); the load-bearing beam (1) is provided with a lifting lug (11) and is connected to a lifting device through the lifting lug (11); the lifting arm (2) is connected to the load-bearing beam (1), the lifting arm (2) has an insertion end (21) and is detachably connected to the bearing seat (102) through the insertion end (21); wherein, the outer dimension of the insertion end (21) is smaller than the inner dimension of the reserved hole (103) on the bearing seat (102).

2. The special lifting tool for a ten-roller straightener according to claim 1, characterized in that, At least two lifting lugs (11) are provided, and are respectively provided at both ends of the bearing beam (1); wherein, the lifting lug (11) near the end of the lifting arm (2) has two hanging ear plates respectively provided on both sides of the axial direction of the bearing beam (1), the bottom of the hanging ear plate is fixedly connected to the bearing beam (1), and a reinforcing rib is provided between the hanging ear plate and the bearing beam (1); the lifting lug (11) away from the end of the lifting arm (2) is provided on the top of the bearing beam (1), and a lifting hole is provided thereon.

3. The special lifting tool for a ten-roller straightener according to claim 1, characterized in that, The supporting beam (1) is provided with a plurality of fixed points (12) arranged at intervals along the axial direction, and the lifting arm (2) is provided with a connecting hole (22); wherein, by fasteners passing through the connecting hole (22) and any fixed point (12), the lifting arm (2) is locked at the corresponding extension length.

4. The special lifting tool for a ten-roller straightener according to claim 1, characterized in that, A fixed central shaft (4) is provided between the lifting arm (2) and the bearing beam (1), and the lifting arm (2) is pivotally connected to the bearing beam (1) through the fixed central shaft (4).

5. The special lifting tool for a ten-roller straightener according to claim 4, characterized in that, The end of the supporting beam (1) is provided with an arc-shaped guide groove (13), and the lifting arm (2) is provided with a locking pin (23). The locking pin (23) passes through the arc-shaped guide groove (13) and can slide along the arc-shaped guide groove (13) to lock the lifting arm (2) at the corresponding rotation angle.

6. The special lifting tool for a ten-roller straightener according to claim 1, characterized in that, It also includes a pressure plate, on which several through holes are provided, and on which several threaded holes are provided in the bearing seat (102); wherein, after the lifting arm (2) is inserted into the reserved hole of the bearing seat (102), the pressure plate (5) presses against the lifting arm (2), and the screw passes through the through hole and is screwed into the corresponding threaded hole to fix the lifting arm (2) on the bearing seat (102).

7. The special lifting tool for a ten-roller straightener according to claim 1, characterized in that, It also includes a claw (6), the top of which is provided with a matching hole, and the bottom of the lifting arm (2) is provided with a connecting plate, the connecting plate having multiple bolt holes, the bolts passing through the matching hole and connecting bolt holes to detachably fix the claw (6) to the lifting arm (2); The claw (6) has a U-shaped opening, and the opening of the U-shaped opening is oriented in the same direction as the extension direction of the insertion end (21).

8. The special lifting tool for a ten-roller straightener according to claim 2, characterized in that, It also includes a counterweight mechanism (3); the counterweight mechanism (3) is disposed on the bearing beam (1), and includes a counterweight block (31) and an adjustable chain (32). The counterweight block (31) is disposed at one end of the bearing beam (1) away from the lifting arm (2), and at least two lifting lugs (11) are respectively disposed at both ends of the top of the bearing beam (1); The adjustable chain (32) is connected to at least two of the lifting lugs (11) respectively, and is configured to adjust the center of gravity of the lifting device by adjusting the length of the chain connected to the corresponding lifting lug (11).

9. The special lifting tool for a ten-roller straightener according to claim 1, characterized in that, The front end of the insertion end (21) is provided with a guide slope or a gradually widening opening.

10. A method for using a special lifting tool for a ten-roller straightener, characterized in that, The method, using the special lifting device for a ten-roller straightener as described in any one of claims 1 to 9, includes: By connecting the lifting equipment through the lifting lug (11), the lifting device is moved above the ten-roll straightener, so that the insertion end (21) of the lifting arm (2) is aligned with the reserved hole (103) on the bearing seat (102); Insert the insertion end (21) into the reserved hole (103) in the horizontal direction, and fix the lifting arm (2) on the bearing seat (102); Operate the lifting equipment to lift the straightening roller assembly (10) off the frame smoothly.

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