A hoisting device and method for processing rough rolling backup roll breakage

Abstract

This invention discloses a hoisting device and method for handling broken roughing mill support rolls, comprising a bracket, a first mounting box, and a second mounting box. Both the first and second mounting boxes are located on top of the bracket. The upper part of both the first and second mounting boxes is equipped with a mechanism for supporting the broken roll and correcting its deviation. The first and second mounting boxes have identical configurations and widths, and the length of the first mounting box is greater than the length of the second mounting box. This invention solves the safety hazards associated with the difficulty of hoisting broken rolls in existing methods, as well as the problem of excessively long hoisting times using wire ropes.

Description

Technical Field

[0001] This invention relates to hot rolling technology, and more specifically, to a hoisting device and method for handling broken roughing mill support rolls. Background Technology

[0002] Currently, when handling broken support rolls on the roughing mill's hot rolling line, steel companies typically remove the work roll and then have workers crawl into the narrow frame to simply connect and fix the broken roll by welding numerous steel bars circumferentially to it. Then, a push-pull rod is installed into the roll changing bracket 1 (e.g., ...). Figure 1 As shown), through roughing mill stand 2 (as shown) Figure 2 The support roll balancing cylinder moves up and down to place the upper support roll that was broken off during roughing into the roll changing bracket 1 (as shown). Figure 3 (As shown).

[0003] Because the space inside the roughing mill stand 1 is small, the position of the support roll on the roughing mill will be slightly off after the roll breaks. Therefore, when removing the roll from the roll replacement bracket 2 and the broken roll on the roll replacement bracket 2, one must be very careful. If the roll removal is blocked, it must be pulled back and forth. The position of the broken roll must also be adjusted by the continuous up and down movement of the support roll balance cylinder in the roughing mill stand 1. In order to ensure safety during the roll removal, this process is very slow. After the broken roll is removed, the original lifting tool for lifting the roughing mill support roll can no longer be used, so a wire rope must be used for hoisting. However, there is no safe lifting point on the broken support roll, so the wire rope hoisting operation is both dangerous and time-consuming, affecting the time of handling the broken roll accident. Summary of the Invention

[0004] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a hoisting device and method for handling broken roughing support rolls, so as to solve the safety hazards caused by the difficulty in hoisting the broken rolls in the existing operation, as well as the problem that the hoisting operation with wire rope is too long.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On the one hand, a hoisting device for handling broken roughing mill support rolls includes a bracket, a first set of housings, and a second set of housings;

[0007] Both the first and second set of boxes are located on top of the bracket;

[0008] Both the first and second set boxes are equipped with mechanisms on their upper parts for placing broken rollers and correcting their deviation.

[0009] The first set of boxes has the same structure as the second set of boxes, and both have the same width; however, the length of the first set of boxes is greater than the length of the second set of boxes.

[0010] Preferably, the bracket includes a bracket body and two cavities disposed within the bracket body;

[0011] The bottom of the bracket body is provided with support legs;

[0012] The two cavities are rectangular and symmetrical about the same center line;

[0013] The cavity is provided with a top plate at the top, and the upper surface of the top plate is provided with a positioning trapezoidal block.

[0014] Preferably, the cavity includes three vertically equidistant steel plates, and a horizontal bottom plate is provided at the bottom end of the steel plates;

[0015] Both steel plates located on the sides are provided with fixed lifting lugs on their outer surfaces, and the two fixed lifting lugs are arranged symmetrically.

[0016] Preferably, the positioning trapezoidal block has three blocks, and the longitudinal center lines of the three positioning trapezoidal blocks are located on the same straight line.

[0017] Preferably, the first kit housing has an installation cavity;

[0018] A transverse lead screw is provided at the center line position inside the mounting cavity. The two ends of the lead screw are cylindrical and are used to pass through the corresponding circular holes on the inner wall of the mounting cavity.

[0019] A rotating handle is provided at one end of the lead screw;

[0020] Two circular holes are opened on each of the longitudinal inner walls of the mounting cavity, and movable lifting lugs are installed in the circular holes;

[0021] The movable lug is connected to the lead screw via a transmission mechanism;

[0022] The bottom of the first set of boxes is provided with a positioning groove that matches the positioning trapezoidal block.

[0023] Preferably, the transmission mechanism includes a lead screw nut fitted on both ends of the lead screw, a lead screw nut connecting strip connected to the lead screw nut, a lifting lug connecting strip connected to the movable lifting lug, and a connecting strip connecting the lead screw nut connecting strip and the lifting lug connecting strip.

[0024] Preferably, a circular tube is provided on the inner side of the inner wall of the mounting cavity facing the circular hole;

[0025] Each of the mounting cavities has a longitudinal reinforcing strip located near the circular hole, and the circular tube passes through the longitudinal reinforcing strip.

[0026] Preferably, the connecting strip is connected to the threaded nut connecting strip and the lifting lug connecting strip by bolts.

[0027] On the other hand, a method for handling broken roughing mill support rolls involves using the aforementioned lifting device to perform the following steps:

[0028] S1. Align the first set box and the second set box with the positioning groove and install them onto the top of the bracket. Use a steel wire rope to lift the fixed lugs through the crane and place the bracket in place. Then, install the first set box, the second set box and the bracket into the roughing mill stand.

[0029] S2. Lower the upper roughing mill support roll balance cylinder so that the two broken rolls fall on the corresponding first and second set boxes. Move the first set box, the second set box, and the bracket along with the broken rolls out of the roughing mill stand by using the roughing mill push-pull rod.

[0030] S3. Rotate the handle to drive the lead screw, which in turn drives the lead screw nut to move. During the movement, the lead screw nut drives the movable lifting lug to move laterally outward through the transmission mechanism, so that the movable lifting lug extends out of the round tube, forming four lifting points on each of the first and second set boxes. Then, use a steel wire rope to lift the first and second set boxes together with the broken roller.

[0031] The present invention provides a hoisting device and method for handling broken roughing mill support rolls. When the device is installed into the roughing mill stand, the four retractable lifting lugs on the rotating screw retract, ensuring that the device does not collide with the mill stand during installation. After the device and the broken roll are pulled out, the four retractable lifting lugs extend, forming four lifting points for convenient hoisting. This solves the safety hazards associated with the difficulty of hoisting broken rolls in existing methods, as well as the problem of excessively long hoisting times using wire ropes. It also has the advantages of improving the safety of hoisting broken rolls and significantly shortening the hoisting time. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of an existing roller changing bracket;

[0033] Figure 2 This is a schematic diagram of an existing roughing mill stand;

[0034] Figure 3 This is a schematic diagram of the roll changing stand being installed into the roughing mill stand;

[0035] Figure 4 This is a front view schematic diagram of the bracket in the hoisting device of the present invention;

[0036] Figure 5This is a side view of the bracket in the hoisting device of the present invention;

[0037] Figure 6 This is a top view of the bracket in the hoisting device of the present invention;

[0038] Figure 7 This is a front view schematic diagram of the first set of boxes in the hoisting device of the present invention;

[0039] Figure 8 This is a side view of the first and second set of boxes in the hoisting device of the present invention, wherein (a) is the first set of boxes and (b) is the second set of boxes;

[0040] Figure 9 This is a top view of the first set of boxes and the second set of boxes in the hoisting device of the present invention, wherein (a) is the first set of boxes and (b) is the second set of boxes;

[0041] Figure 10 This is a structural schematic diagram of the hoisting device of the present invention. Detailed Implementation

[0042] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Combination Figure 10 As shown, the hoisting device for handling broken roughing support rolls provided by the present invention includes a bracket 10, a first set of housings 11 and a second set of housings 12.

[0044] The first set of boxes 11 and the second set of boxes 12 are both located on top of the bracket 10.

[0045] Both the first set of housing 11 and the second set of housing 12 are equipped with a mechanism on the upper part for placing broken rollers and correcting their deviation, which can adjust the height of the broken rollers to maintain a horizontal position.

[0046] The first set of boxes 11 and the second set of boxes 12 have the same structure and the same width; and the length of the first set of boxes 11 is greater than the length of the second set of boxes 12, forming two boxes of different sizes.

[0047] Combination Figures 4 to 6 As shown, the bracket 10 includes a bracket body 13 and two cavities 14 disposed within the bracket body 13. The two cavities 14 are rectangular and symmetrical about the same center line.

[0048] The bottom of the bracket body 13 is provided with two support legs 15.

[0049] The cavity 14 includes three vertically equidistant steel plates 16, and a horizontal base plate 17 is provided at the bottom end of the steel plates 16.

[0050] The height of the three steel plates 16 is equivalent to 2 / 3 of the height of the cavity 14.

[0051] Two steel plates 16 located on the sides are provided with fixed lifting lugs 18 on their outer surfaces, and the two fixed lifting lugs 18 are arranged symmetrically.

[0052] The top of the cavity 14 is provided with a top plate 19. The upper surface of the top plate 19 is provided with three positioning trapezoidal blocks 20 of the same size and shape. The positioning trapezoidal blocks 20 are larger at the bottom and smaller at the top, and the longitudinal center lines of the three positioning trapezoidal blocks 20 are located on the same straight line.

[0053] Combination Figures 7 to 9 As shown, the first set of housing 11 has an installation cavity 21 inside.

[0054] A transverse lead screw 22 is provided at the center line position inside the mounting cavity 21. The two ends of the lead screw 22 are cylindrical and are used to pass through the corresponding circular holes on the inner wall of the mounting cavity 21.

[0055] One end of the lead screw 22 passes slightly through the round hole outside the mounting cavity 21 and is equipped with a rotating handle.

[0056] Two round holes are opened on each of the longitudinal inner walls of the cavity 21, and movable lugs 23 are installed in the round holes.

[0057] A circular tube 24 is provided on the inner side of the inner wall of the mounting cavity 21 with the circular hole facing it, and the movable lifting lug 23 is located inside the circular tube 24.

[0058] A longitudinal reinforcing strip 25 is provided in each cavity 21 near the circular hole, and the circular tube 24 passes through the longitudinal reinforcing strip 25.

[0059] The movable lifting lug 23 is connected to the lead screw 22 through a transmission mechanism, and the lead screw 22 drives the movable lifting lug 23 to extend / retract along the circular tube 24.

[0060] The transmission mechanism includes a screw nut 26 sleeved on both ends of the screw 22, a screw nut connecting bar 27 connected to the screw nut 26, a lifting lug connecting bar 28 connected to the movable lifting lug 23, and a connecting bar 29 connecting the screw nut connecting bar 27 and the lifting lug connecting bar 28.

[0061] The connecting bar 29 is connected to the threaded nut connecting bar 27 and the lifting lug connecting bar 28 by bolts 30. By rotating the threaded rod 22, the threaded nut 26 is driven, and the threaded nut 26 drives the movable lifting lug 23 to move laterally inside the round tube 24 through the transmission mechanism.

[0062] The bottom of the first set of boxes 11 is provided with a positioning groove 31 that matches the positioning trapezoidal block 20.

[0063] The structure of the second set of boxes 12 is the same as that of the first set of boxes 11.

[0064] See again Figure 10 As shown, the first set of boxes 11 and the second set of boxes 12 are placed on the bracket 10 at the same time. The positioning groove 31 and the positioning trapezoidal block 20 fit together perfectly to form two independent platforms with a certain gap between them.

[0065] The present invention also provides a method for hoisting a broken roughing mill support roll, wherein the hoisting device for handling broken roughing mill support rolls of the present invention performs the following steps:

[0066] S1. After a support roll breakage accident occurs, first observe the location of the broken support roll. Based on the location of the broken roll, align the first set of housing 11 and the second set of housing 12 with the positioning groove 31 and install them onto the top of the bracket 10. Use a steel wire rope to lift the fixed lifting lug 18 through the crane to place the bracket 10 in place. Then, install the first set of housing 11, the second set of housing 12 and the bracket 10 into the roughing mill stand.

[0067] S2. Lower the upper roughing mill support roll balance cylinder so that the two broken rolls fall on the corresponding first set box 11 and second set box 12. The longer section of the broken roll falls on the first set box 11 and the shorter section falls on the second set box 12. Move the first set box 11, the second set box 12 and the bracket 10 together with the broken rolls out of the roughing mill stand by using the roughing mill push-pull rod.

[0068] S3. Turn the handle to drive the lead screw 22, which in turn drives the lead screw nut 26 to move. During the movement, the lead screw nut 26 drives the movable lifting lug 23 to move laterally outward through the transmission mechanism, so that the movable lifting lug 23 extends out of the round tube 24, forming four lifting points on each of the first set of housings 11 and the second set of housings 12. Then, use steel wire rope to lift the first set of housings 11 and the second set of housings 12 together with the broken roller. Then, install the new support roller.

[0069] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A hoisting device for handling broken roughing mill support rolls, characterized in that: Includes a bracket, a first set of cabinets, and a second set of cabinets; The bracket includes a bracket body and two cavities disposed within the bracket body. The cavity comprises three steel plates arranged vertically and equidistantly. Both steel plates located on the sides are provided with fixed lifting lugs on their outer surfaces, and the two fixed lifting lugs are arranged symmetrically; the first and second set boxes are both located on the top of the bracket; Both the first and second set boxes are equipped with mechanisms on their upper parts for placing broken rollers and correcting their deviation. The first and second set of boxes have the same structure and the same width; however, the length of the first set of boxes is greater than the length of the second set of boxes. The first kit has an installation cavity inside its housing; A transverse lead screw is provided at the center line position inside the mounting cavity. The two ends of the lead screw are cylindrical and are used to pass through the corresponding circular holes on the inner wall of the mounting cavity. A rotating handle is provided at one end of the lead screw; Two circular holes are opened on each of the longitudinal inner walls of the mounting cavity, and movable lifting lugs are installed in the circular holes; The movable lug is connected to the lead screw via a transmission mechanism.

2. The hoisting device for handling broken roughing mill support rolls according to claim 1, characterized in that: The bottom of the bracket body is provided with support legs; The two cavities are rectangular and symmetrical about the same center line; The top of the cavity is provided with a top plate, and the upper surface of the top plate is provided with a positioning trapezoidal block; The bottom of the first set of boxes is provided with a positioning groove that matches the positioning trapezoidal block.

3. The hoisting device for handling broken roughing mill support rolls according to claim 2, characterized in that: The bottom of the steel plate is provided with a horizontal base plate.

4. The hoisting device for handling broken roughing mill support rolls according to claim 3, characterized in that: The positioning trapezoidal block has three parts, and the longitudinal center lines of the three positioning trapezoidal blocks are located on the same straight line.

5. The hoisting device for handling broken roughing mill support rolls according to claim 4, characterized in that: The transmission mechanism includes a lead screw nut fitted on both ends of the lead screw, a lead screw nut connecting strip connected to the lead screw nut, a lifting lug connecting strip connected to the movable lifting lug, and a connecting strip connecting the lead screw nut connecting strip and the lifting lug connecting strip.

6. The hoisting device for handling broken roughing mill support rolls according to claim 5, characterized in that: A circular tube is provided on the inner side of the inner wall of the mounting cavity facing the circular hole; Each of the mounting cavities has a longitudinal reinforcing strip located near the circular hole, and the circular tube passes through the longitudinal reinforcing strip.

7. The hoisting device for handling broken roughing mill support rolls according to claim 6, characterized in that: The connecting strip is connected to the threaded nut connecting strip and the lifting lug connecting strip by bolts.

8. A method for hoisting and handling broken roughing mill support rolls, characterized in that, The following steps are performed using the hoisting device for handling broken roughing mill support rolls as described in claim 7: S1. Align the first set box and the second set box with the positioning groove and install them onto the top of the bracket. Use a steel wire rope to lift the fixed lugs through the crane and place the bracket in place. Then, install the first set box, the second set box and the bracket into the roughing mill stand. S2. Lower the upper roughing mill support roll balance cylinder so that the two broken rolls fall on the corresponding first and second set boxes. Move the first set box, the second set box, and the bracket along with the broken rolls out of the roughing mill stand by using the roughing mill push-pull rod. S3. Rotate the handle to drive the lead screw, which in turn drives the lead screw nut to move. During the movement, the lead screw nut drives the movable lifting lug to move laterally outward through the transmission mechanism, so that the movable lifting lug extends out of the round tube, forming four lifting points on each of the first and second set boxes. Then, use a steel wire rope to lift the first and second set boxes together with the broken roller.

Images