An automatic positioning roller hoist and method of use thereof

Abstract

The application discloses an automatic positioning roller lifting appliance and relates to the technical field of hot-rolled strip steel in the metallurgical industry. The automatic positioning roller lifting appliance comprises a lifting appliance device and a positioning device. The lifting appliance device comprises a lifting frame, a support frame, a fixing column, a rotating part, a clamping plate, a hydraulic cylinder two, a fixing plate and a pressing plate. The clamping plate can hold the roller by the hydraulic cylinder, the antiskid pad can increase the friction between the clamping plate and the roller surface, the pressing plate can hold the roller by the hydraulic cylinder three, and the roller can be pressed down by the pressing plate through the hydraulic cylinder two. Thus, the roller can be clamped and fixed in all directions, the shaking range of the roller during lifting is reduced, the stability and safety of the roller during lifting are enhanced, the positioning rod moves downward automatically when the roller is clamped and fixed, the position of the roller is positioned conveniently, the positioning rod moves upward automatically when the roller is placed and dropped, the positioning precision of the roller during dropping is improved, and the precision requirement of the roller during lifting is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot-rolled strip steel in the metallurgical industry, in particular to an automatic positioning roller lifting appliance and a method thereof. BACKGROUND

[0002] The roller is the main working component and tool for continuous plastic deformation of metal on the rolling mill. The roller mainly consists of a roller body, a roller neck and a shaft head. The roller body is the middle part of the roller that actually participates in rolling metal. The roller neck is installed in the bearing, and the rolling force is transmitted to the rack through the bearing seat and the screwdown device. The driving end shaft head is connected with the gear seat through the connecting shaft to transmit the rotating torque of the motor to the roller. When the roller moves, it needs to be lifted by the crane and the lifting appliance, and then it is placed in the fixed position after being lifted to the required position.

[0003] In the prior art, for example, the patent application number CN110980496A "Automatic positioning roller lifting appliance and method thereof" discloses that the guide sleeve 2 is installed on the crane trolley 3, the guide rod mechanism 1 is installed on the lifting appliance 4, the guide sleeve on the crane trolley is located directly above the guide rod mechanism on the lifting appliance, and the guide rod mechanism 1 and the guide sleeve 2 are shape-matched.

[0004] In the process of lifting the roller by the lifting appliance of the existing crane, the lifting appliance usually uses a single clamp to clamp and fix the roller. However, the surface of the roller is relatively smooth, and the roller will inevitably shake during the lifting process. The stability of the roller during the lifting process is poor, which leads to the inclination of the roller during the lifting process. Meanwhile, the existing lifting appliance lacks a positioning device for the roller during the dropping process, which leads to low positioning accuracy when the roller is lowered and placed, and cannot meet the accuracy requirements of the roller lifting.

[0005] Therefore, the present application provides an automatic positioning roller lifting appliance to solve the above problems. SUMMARY

[0006] The present application aims to provide an automatic positioning roller lifting appliance to solve the problem that the existing crane lifts the roller by the lifting appliance, the lifting appliance usually uses a single clamp to clamp and fix the roller, the surface of the roller is relatively smooth, and the roller will inevitably shake during the lifting process, the stability of the roller during the lifting process is poor, which leads to the inclination of the roller during the lifting process, and the existing lifting appliance lacks a positioning device for the roller during the dropping process, which leads to low positioning accuracy when the roller is lowered and placed, and cannot meet the accuracy requirements of the roller lifting.

[0007] In order to achieve the above object, the present application provides the following technical scheme: An automatic positioning roller lifting appliance, comprising a lifting appliance device and a positioning device, the lifting appliance device comprises a lifting frame, a support frame, a fixed column, a rotating part, a clamping plate, a hydraulic cylinder two, a fixed plate and a pressing plate, two hydraulic cylinders one are symmetrically and fixedly installed at both ends of the support frame, the top end of the hydraulic cylinder two is fixedly installed with the bottom of the support frame, and the bottom of the hydraulic cylinder two is provided with a driving rod one, the bottom of the driving rod one is welded and fixed with the top of the pressing plate, the positioning device comprises a lifting plate, the top end of the lifting plate is welded and fixed with the bottom end of the support frame, and the bottom of the lifting plate is symmetrically and fixedly connected with two hydraulic cylinders three, the both ends of the lifting plate are symmetrically provided with a positioning assembly, the positioning assembly comprises a mounting frame, a pressing plate, a mounting plate, a movable rod, a positioning rod and a fixed cylinder, the top of the mounting frame is welded and fixed with the bottom of the mounting plate, and the side of the mounting frame is fixedly installed with the outside of the pressing plate, one end of the movable rod is fixedly connected with the top of the mounting plate, the top of the mounting plate is symmetrically and fixedly connected with two supporting rods, the outside of the two supporting rods is rotatably connected with a connecting rod, one end of the connecting rod is rotatably connected with the top of the positioning rod, the both sides of the mounting frame are symmetrically provided with a connecting frame, one end of the connecting frame is welded and fixed with the outside of the fixed cylinder, and the outside of the positioning rod is slidably connected with the inside of the fixed cylinder.

[0008] Preferably, the top end of the connecting frame is welded and fixed with the outside of the lifting plate, the both ends of the lifting plate are symmetrically provided with a sliding groove, and the top of the supporting rod is slidably connected with the bottom of the sliding groove.

[0009] Preferably, the bottom of the hydraulic cylinder one is provided with a driving rod two, and the bottom end of the hydraulic cylinder one is fixedly connected with the top of the fixed column.

[0010] Preferably, the top end of the rotating part is rotatably installed with the bottom end of the fixed column, and the both ends of the rotating part are symmetrically provided with a clamping part, and the outside of the clamping part is movably connected with the inside of the clamping plate.

[0011] Preferably, the outside of the clamping part is provided with a spring group, one end of the spring group is fixedly connected with the inside of the clamping plate, and the inside of the clamping plate is fixedly connected with an antiskid pad.

[0012] Preferably, the bottom of the lifting frame is welded and fixed with the top of the support frame, and the bottom of the support frame is welded and fixed with the top of the fixed plate.

[0013] Preferably, the bottom of the fixed plate is symmetrically and fixedly connected with a telescopic rod, and the bottom of the telescopic rod is welded and fixed with the top of the pressing plate.

[0014] Preferably, the top of the pressing plate is fixedly connected with the bottom of the driving rod one, and the both ends of the fixed plate are welded and fixed with the inside of the fixed column.

[0015] A method for using an automatic positioning roller lifting device, comprising the following steps:

[0016] S1, first, the crane drives the lifting device to rise to the top end, prepares to carry out the roller lifting work, and then runs the lifting device and the positioning device to a certain distance above the roller through the crane;

[0017] S2, the crane controls the lifting device and the positioning device to descend above the roller, the crane controls to open the hydraulic cylinder one, the hydraulic cylinder drives the rotating part downward through the driving rod two, the rotating part drives the clamping plates at both ends to clamp the roller, the crane controls the lifting device to move upward by a distance, so that the roller is lifted;

[0018] S3, the crane controls to open the hydraulic cylinder three, the two hydraulic cylinders three drive the mounting frame, the supporting rod and the pressing plate to move to the middle along the lifting plate through the movable rod, the connecting rod pushes the positioning rod to slide downward along the fixed cylinder until the pressing plate is attached to both ends of the roller and clamps the roller, and the hydraulic cylinder three is closed;

[0019] S4, the crane controls to open the hydraulic cylinder two, the hydraulic cylinder two drives the pressing plate to move downward through the driving rod two until the pressing plate clamps the roller, at this time, the roller is clamped and fixed in all directions;

[0020] S5, after the crane is lifted to the position, the lifting device and the roller are transported to the specified position and stopped, the crane controls the lifting device and the roller to descend, the control personnel position the position of the roller through the positioning rod, after the position is determined, the lifting device and the roller move vertically downward, at the same time, the pressing plate is driven away from the roller through the hydraulic cylinder three, the positioning rod moves upward, after the roller is stable, the clamping plates of the lifting device open to both sides, the crane controls the lifting device to lift and return to the waiting position.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] 1, in the present application, by setting the clamping plate, the pressing plate and the pressing plate, the rotating part can be driven downward through the hydraulic cylinder, the rotating part drives the clamping plate and the clamping plate to clamp the roller, the spring group can make the clamping plate and the roller more compact, at the same time, the outer side of the clamping plate increases the anti-skid pad, the anti-skid pad is made of leather or rubber material, the friction between the clamping plate and the outer surface of the roller is increased, the clamping of the clamping plate on the roller is more stable; the pressing plate can clamp the roller through the hydraulic cylinder three, the pressing plate can move downward through the hydraulic cylinder two until the pressing plate clamps the roller, the pressing plate, the clamping plate and the pressing plate can clamp and fix the roller in all directions, avoid the inclination of the roller in the lifting process, at the same time, reduce the swing amplitude of the roller in the lifting process, enhance the stability and safety of the roller in the lifting process;

[0023] 2、The positioning device is arranged, the positioning rod is automatically moved downwards when the positioning device clamps and fixes the roll, the position of the roll is positioned by the positioning rod during the slow placing process of the roll, the roll is accurately placed in the required position, the positioning rod is automatically moved upwards when the roll is placed, the positioning precision of the roll during the placing process is improved, and the precision requirement of the roll hoisting is met. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective view of the automatic positioning roll lifting appliance of the application;

[0025] Figure 2 It is a schematic view of the overall structure of the automatic positioning roll lifting appliance of the application;

[0026] Figure 3 It is a structural perspective view of the lifting appliance device of the automatic positioning roll lifting appliance of the application;

[0027] Figure 4 It is a side view of the lifting appliance device of the automatic positioning roll lifting appliance of the application;

[0028] Figure 5 It is a schematic view of the structure of the positioning device of the automatic positioning roll lifting appliance of the application;

[0029] Figure 6 It is a schematic view of the structure of the positioning device of the automatic positioning roll lifting appliance of the application;

[0030] Figure 7 It is a schematic view of the structure of the positioning device of the automatic positioning roll lifting appliance of the application;

[0031] Figure 8 It is a front view of the positioning assembly of the automatic positioning roll lifting appliance of the application.

[0032] In the figure: 1, lifting appliance device; 3, positioning device; 11, lifting frame; 12, support frame; 13, hydraulic cylinder one; 14, driving rod one; 15, clamping piece; 16, fixed column; 17, driving rod two; 18, rotating piece; 19, clamping plate; 20, hydraulic cylinder two; 21, fixed plate; 22, telescopic rod; 23, pressing plate; 24, spring group; 25, anti-skid pad; 31, positioning assembly; 32, hydraulic cylinder three; 33, sliding groove; 34, lifting plate; 311, mounting frame; 312, pressing plate; 313, mounting plate; 314, movable rod; 315, connecting frame; 316, connecting rod; 317, fixed cylinder; 318, positioning rod; 319, support rod. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0034] Referring to Figures 1-8 As shown in the figure: an automatic positioning roller lifting appliance includes a lifting appliance device 1 and a positioning device 3, the lifting appliance device 1 includes a lifting frame 11, a support frame 12, a fixed column 16, a rotating part 18, a clamping plate 19, a hydraulic cylinder two 20, a fixed plate 21 and a pressing plate 23, two hydraulic cylinders one 13 are symmetrically and fixedly installed at both ends of the support frame 12, the top end of the hydraulic cylinder two 20 is fixedly installed with the bottom of the support frame 12, and the bottom of the hydraulic cylinder two 20 is provided with a driving rod one 14, the bottom of the driving rod one 14 is welded and fixed with the top of the pressing plate 23, the positioning device 3 includes a lifting plate 34, the top end of the lifting plate 34 is welded and fixed with the bottom end of the support frame 12, and both ends of the bottom of the lifting plate 34 are symmetrically and fixedly connected with two hydraulic cylinders three 32, the lifting plate 34 is symmetrically provided with a positioning assembly 31 at both ends, the positioning assembly 31 includes a mounting frame 311, a pressing plate 312, a mounting plate 313, a movable rod 314, a positioning rod 318 and a fixed cylinder 317, the top of the mounting frame 311 is welded and fixed with the bottom of the mounting plate 313, and one side of the mounting frame 311 is fixedly installed with the inner side of the pressing plate 312, one end of the movable rod 314 is fixedly connected with the top of the mounting plate 313, both ends of the top of the mounting plate 313 are symmetrically and fixedly connected with two support rods 319, the outer sides of the two support rods 319 are rotatably connected with a connecting rod 316, one end of the connecting rod 316 is rotatably connected with the top of the positioning rod 318, both sides of the mounting frame 311 are symmetrically provided with a connecting frame 315, one end of the connecting frame 315 is welded and fixed with the outer side of the fixed cylinder 317, and the outer side of the positioning rod 318 is slidably connected with the inner side of the fixed cylinder 317.

[0035] As Figures 5-8 shown, the top end of the connecting frame 315 is welded and fixed with the outer side of the lifting plate 34, both ends of the lifting plate 34 are symmetrically provided with a sliding groove 33, the top of the support rod 319 is slidably connected with the bottom of the sliding groove 33, the connecting frame 315 is used for supporting the fixed cylinder 317, and the sliding groove 33 facilitates the left and right movement of the support rod 319.

[0036] As Figures 1-4 shown, the bottom of the hydraulic cylinder one 13 is provided with a driving rod two 17, the bottom end of the hydraulic cylinder one 13 is fixedly connected with the top of the fixed column 16, and the hydraulic cylinder 13 can drive the rotating part 18 to rotate downward through the driving rod two 17, and the rotating part 18 drives the clamping plates 15 and 19 at both ends to clamp the roller.

[0037] AsFigures 1-4 As shown in the figure, the top end of the rotating piece 18 is rotatably installed with the bottom end of the fixed column 16, and the two ends of the rotating piece 18 are symmetrically provided with clamping pieces 15, the outer side of the clamping piece 15 is movably connected with the inner side of the clamping plate 19, and the rotating piece 18 can support the clamping piece 15 to rotate, thereby facilitating clamping and fixing and loosening the roller.

[0038] As shown in the figure, Figures 1-4 The outer side of the clamping piece 15 is provided with a spring set 24, one end of the spring set 24 is fixedly connected with the inner side of the clamping plate 19, the inner side of the clamping plate 19 is fixedly connected with a non-slip pad 25, and the spring set 24 can make the clamping plate 19 and the roller more compact, and the non-slip pad 25 made of leather or rubber is arranged on the outer side of the clamping plate 19 to increase the friction between the outer surface of the clamping plate 19 and the roller.

[0039] As shown in the figure, Figures 1-3 The bottom of the hanger 11 is welded and fixed with the top of the support frame 12, and the bottom of the support frame 12 is welded and fixed with the top of the fixed plate 21.

[0040] As shown in the figure, Figures 1-4 The two ends of the bottom of the fixed plate 21 are fixedly connected with telescopic rods 22, and the bottom of the telescopic rod 22 is welded and fixed with the top of the pressing plate 23, and the telescopic rod 22 can fix the pressing plate 23, and the pressing plate 23 is more stable during pressing.

[0041] As shown in the figure, Figures 1-4 The top of the pressing plate 23 is fixedly connected with the bottom of the driving rod 14, and the two ends of the fixed plate 21 are welded and fixed with the inner side of the fixed column 16, and the pressing plate 23 can press the roller downward to reduce the shaking amplitude of the roller during hoisting.

[0042] A use method of the automatic positioning roller hoist, comprising the following steps:

[0043] Step one, first, the crane drives the hoist device 1 to rise to the top end, prepares to carry out the roller hoisting work, and then the crane runs the hoist device 1 and the positioning device 3 to a certain distance above the roller;

[0044] Step two, the crane controls the hoist device 1 and the positioning device 3 to descend above the roller, the crane controls to open the hydraulic cylinder 13, the hydraulic cylinder 13 drives the rotating piece 18 to rotate downward through the driving rod 17, the rotating piece 18 drives the clamping plate 15 and the clamping plate 19 at both ends to clamp the roller, and the crane controls the hoist device 1 to move upward by a distance, so that the roller is lifted;

[0045] Step three, crane control open hydraulic cylinder three 32, two hydraulic cylinder three 32 through the movable rod 314 drive mounting bracket 311, support rod 319 and the compression plate 312 along the hanging plate 34 to the middle of the movement, connecting rod 316 push positioning rod 318 along the fixed cylinder 317 down slide, until the compression plate 312 with the roller two end close and clamp the roller, close hydraulic cylinder three 32;

[0046] Step four, crane control open hydraulic cylinder two 20, hydraulic cylinder two 20 through the drive rod two 17 drive the compression plate 23 down, until the compression plate 23 roller is pressed tightly, at this time the roller is all-ways clamped and fixed;

[0047] Step five, after the crane hoisting in place, the lifting device 1 and the roller are transported to the designated position and stopped, the crane controls the lifting device 1 and the roller to descend, the control personnel position the position of the roller through the positioning rod 318, after determining the position, the lifting device 1 and the roller vertically downward move, at the same time, the compression plate 312 is driven away from the roller through the hydraulic cylinder three 32, the positioning rod 318 moves upward, after the roller falls stably, the clamping plate 15 of the lifting device 1 opens to both sides, the crane controls the lifting device 1 to hoist and return to the waiting position.

[0048] In the application, when the roller is hoisted, first, the crane and the hanger 11 on the top of the lifting device 1 are installed, then the crane drives the lifting device 1 and the positioning device 3 to the top, ready for the roller hoisting work, then the crane drives the lifting device 1 and the positioning device 3 to a certain distance above the roller, and then the crane controls the lifting device 1 and the positioning device 3 to descend above the roller.

[0049] The crane control opens the hydraulic cylinder one 13, the hydraulic cylinder 13 drives the rotating piece 18 to rotate downward through the driving rod two 17, the rotating piece 18 drives the clamping plate 15 and the clamping plate 19 at both ends to clamp the roll, the spring group 24 can make the clamping plate 19 and the roll more compact, and the anti-skid pad 25 outside the clamping plate 19 is increased, the anti-skid pad 25 is made of leather or rubber material, the friction force between the clamping plate 19 and the outer surface of the roll is increased, and the clamping of the clamping plate 19 to the roll is more stable; the crane control hoist device 1 moves a distance, the roll is lifted, the crane control opens the hydraulic cylinder three 32, the two hydraulic cylinders three 32 drive the mounting frame 311, the supporting rod 319 and the pressing plate 312 to move to the middle along the hanging plate 34 through the movable rod 314, the supporting rod 319 drives the connecting rod 316 to move while moving, the connecting rod 316 is rotatably connected with the outside of the rod 319 and the top of the positioning rod 318 at both ends respectively, the connecting rod 316 drives the positioning rod 318 to slide downward along the fixed cylinder 317 until the pressing plate 312 is attached to both ends of the roll and clamps the roll, the hydraulic cylinder three 32 is closed, the crane controls the opening of the hydraulic cylinder two 20, the hydraulic cylinder two 20 drives the pressing plate 23 to move downward through the driving rod two 17 until the pressing plate 23 clamps the roll, at this time, the pressing plate 23, the clamping plate 19 and the pressing plate 312 clamp and fix the roll in all directions, so that the roll does not tilt during hoisting, and the shaking amplitude of the roll during hoisting is reduced, and the stability and safety of the roll during hoisting are enhanced;

[0050] After the crane is lifted to the position, the hoist device 1 and the roll are transported to the specified position and stopped, the crane controls the hoist device 1 and the roll to slowly descend, the bottom end of the positioning rod 318 is lower than the lower surface of the roll, and the positioning rod 318 is located at both ends of the roll, the control personnel positions the position of the roll through the positioning rod 318, after the position is determined, the hoist device 1 and the roll move vertically downward, at the same time, the supporting rod 319 and the pressing plate 312 are driven away from the roll through the hydraulic cylinder three 32, the supporting rod 319 drives the connecting rod 316 to move, and the connecting rod 316 drives the positioning rod 318 to move upward, so that the positioning device 3 is clamped and fixed to the roll, the positioning rod 318 automatically moves downward, the positioning rod 318 automatically moves upward when the roll is placed, the positioning accuracy of the roll during the downward placement is improved, the accuracy requirement of the roll hoisting is met; after the roll is stable, the crane controls the hydraulic cylinder one 13, the hydraulic cylinder one 13 drives the clamping plate 15 to open to both sides through the driving rod two 17, the clamping plate 15 and the clamping plate 19 release the roll, the crane controls the hoist device 1 to lift and return to the waiting position.

[0051] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic positioning roll hoist, characterized by, The utility model provides a crane device (1) and positioning device (3) are included, the crane device (1) includes crane (11), support frame (12), fixed column (16), rotating part (18), clamping plate (19), hydraulic cylinder two (20), fixed plate (21) and presser plate (23), the top of rotating part (18) is rotatably installed with the bottom of fixed column (16), and the both ends of rotating part (18) are provided with clamping piece (15) symmetrically, the inner side of clamping piece (15) is movably connected with the outside of clamping plate (19), the bottom of crane (11) is welded with the top of support frame (12) fixedly, the bottom of support frame (12) is welded with the top of fixed plate (21) fixedly, two hydraulic cylinder one (13) are fixedly installed to the both ends of support frame (12), the bottom of hydraulic cylinder one (13) is provided with drive rod two (17), drive rod two (17) drives rotating part (18), the bottom of hydraulic cylinder one (13) is fixedly connected with the top of fixed column (16), the top of hydraulic cylinder two (20) is fixedly installed with the bottom of support frame (12), and the bottom of hydraulic cylinder two (20) is provided with drive rod one (14), the bottom of drive rod one (14) is welded with the top of presser plate (23) fixedly, the both ends of fixed plate (21) are welded with the inner side of fixed column (16) fixedly, the positioning device (3) includes hanging plate (34), the top of hanging plate (34) is welded with the bottom of support frame (12) fixedly, and the bottom of hanging plate (34) is fixedly connected with two hydraulic cylinder three (32) symmetrically, the both ends of hanging plate (34) are provided with positioning assembly (31) symmetrically, positioning assembly (31) includes mounting bracket (311), compression plate (312), mounting plate (313), movable rod (314), positioning rod (318) and fixed cylinder (317), the top of mounting bracket (311) is welded with the bottom of mounting plate (313) fixedly, and one side of mounting bracket (311) is fixedly installed with the outside of compression plate (312), one end of movable rod (314) is fixedly connected with the top of mounting plate (313), the top of mounting plate (313) is fixedly connected with two support rods (319) symmetrically, the outside of two support rods (319) is rotatably connected with connecting rod (316), one end of connecting rod (316) is rotatably connected with the top of positioning rod (318), the both sides of mounting bracket (311) are provided with connecting frame (315) symmetrically, one end of connecting frame (315) is welded with the outside of fixed cylinder (317) fixedly, the outside of positioning rod (318) is slidably connected with the inside of fixed cylinder (317), hydraulic cylinder three (32) drives mounting bracket (311), support rod (319) and compression plate (312) to move along hanging plate (34) to the middle thereof through movable rod (314).

2. An automatic roll positioning spreader according to claim 1, characterized in that: The top end of the connecting frame (315) is welded and fixed with the outer side of the hanging plate (34), the two ends of the hanging plate (34) are symmetrically provided with sliding grooves (33), and the top of the supporting rod (319) is slidably connected with the bottom of the sliding groove (33).

3. An automatic roll positioning spreader according to claim 1, characterized in that: The inner side of the clamping piece (15) is provided with a spring set (24), one end of the spring set (24) is fixedly connected with the outer side of the clamping plate (19), and the inner side of the clamping plate (19) is fixedly connected with an antiskid pad (25).

4. An automatic roll positioning spreader according to claim 1, characterized in that: The bottom of the fixing plate (21) is fixedly connected with telescopic rods (22) at both ends in a symmetrical manner, and the bottom of the telescopic rod (22) is welded and fixed with the top of the pressing plate (23).

5. A method of using an automatic roll positioning spreader, characterized by, The automatic positioning roller lifting appliance of any one of claims 1-4 is used, including the following steps: S1, first, the crane drives the lifting appliance device (1) to rise to the top end, prepares to carry out the roller lifting work, and then runs the lifting appliance device (1) and the positioning device (3) to a certain distance above the roller through the crane; S2, the crane controls the lifting appliance device (1) and the positioning device (3) to descend to above the roller, the crane controls to open the hydraulic cylinder one (13), the hydraulic cylinder one (13) drives the rotating piece (18) to rotate downward through the driving rod two (17), the rotating piece (18) drives the clamping piece (15) and the clamping plate (19) at both ends to clamp the roller, the crane controls the lifting appliance device (1) to move upward by a distance, so that the roller is lifted; S3, the crane controls to open the hydraulic cylinder three (32), the two hydraulic cylinder threes (32) drive the mounting frame (311), the supporting rod (319) and the pressing plate (312) to move to the middle of the hanging plate (34) through the movable rod (314), the connecting rod (316) pushes the positioning rod (318) to slide downward along the fixed cylinder (317), until the pressing plate (312) is attached to both ends of the roller and clamps the roller, and the hydraulic cylinder three (32) is closed; S4, the crane controls to open the hydraulic cylinder two (20), the hydraulic cylinder two (20) drives the pressing plate (23) to move downward through the driving rod one (14), until the pressing plate (23) clamps the roller, at this time, the roller is clamped and fixed in all directions; S5, after the crane is lifted to the position, the lifting appliance device (1) and the roller are transported to the specified position and then stopped, the crane controls the lifting appliance device (1) and the roller to descend, the control personnel position the position of the roller through the positioning rod (318), after the position is determined, the lifting appliance device (1) and the roller move vertically downward, at the same time, the pressing plate (312) is driven away from the roller through the hydraulic cylinder three (32), the positioning rod (318) moves upward, after the roller is stable, the clamping piece (15) of the lifting appliance device (1) opens to both sides, the crane controls the lifting appliance device (1) to lift, and returns to the waiting position.

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