Rolling mill arch unloading crane

Abstract

The present invention relates to a plate and strip rolling mill, and in particular to a lifting device for unloading a rolling mill arch. The device comprises a rectangular base plate, the width of which is smaller than the width of the rectangular hole in the rolling mill arch, and the length of which is greater than the width of the rectangular hole in the rolling mill arch. Four lifting lugs are symmetrically provided on the inner sides of the two long sides of the base plate, and movable blocks with L-shaped cross-sections are symmetrically provided at both ends of the wide side of the base plate. The base plate has multiple adjustment holes, the horizontal portions of the movable blocks are detachably connected to the adjustment holes, the vertical portions of the movable blocks rest against the inner side surfaces of the arch columns, and the wide sides of the base plate outside the movable blocks are used to support the columns of the rolling mill arch. A positioning mechanism for adjusting the position of the lifting device is provided on the base plate. The present invention has a simple structure, low cost, improves the efficiency of lifting and unloading, occupies little space, and ensures safe lifting.

Description

Technical Field

[0001] The invention relates to a plate and strip rolling mill, in particular to a rolling mill archway unloading hoist. Background Art

[0002] In the installation project of steel rolling production lines, unloading of rolling mill arches is very common. In many cases, due to the large size and weight of the rolling mill arches, large-diameter and fixed-length steel wire ropes need to be prepared in advance to meet the unloading requirements, and the procurement cost of the steel wire ropes is relatively high. At the same time, due to the large specifications and long length of the steel wire ropes, a large number of operators are required for hooking and unhooking, resulting in a long unloading process and a low safety factor.

[0003] A Chinese utility model patent with authorization announcement number CN210418930U discloses a heavy-duty rolling mill archway hoist, which includes a clamp, a lifting lug, and a gantry. The invention has high material costs and occupies a large space. Summary of the Invention

[0004] The present invention aims to solve the above technical problems and provides a rolling mill arch unloading hoist to ensure the safety of rolling mill arch unloading.

[0005] The present invention solves the technical problem and adopts the following technical solution:

[0006] A rolling mill arch unloading hoist, comprising a rectangular base plate, the width of the base plate being smaller than the width of the rectangular hole of the rolling mill arch, and the length of the base plate being larger than the width of the rectangular hole of the rolling mill arch; four lifting ears are symmetrically provided on the inner sides of the two long sides of the base plate, and movable blocks with L-shaped cross-sections are symmetrically provided at both ends of the wide side of the base plate; the base plate is provided with a plurality of adjustment holes, the horizontal parts of the movable blocks are detachably connected to the adjustment holes, the vertical parts of the movable blocks are against the inner side surfaces of the arch columns, and the wide sides of the base plate outside the movable blocks are used to support the columns of the rolling mill arch; a positioning mechanism for adjusting the position of the hoist is provided on the base plate.

[0007] Compared with the prior art, the present invention adopting the above technical solution has the following beneficial effects:

[0008] The structure is simple, the cost is low, the efficiency of lifting and unloading is improved, the space occupied is small, and the lifting is safe.

[0009] Furthermore, the optimization scheme of the present invention is:

[0010] The lower plate surface of the bottom plate is fixedly connected with a plurality of base transverse reinforcements and base longitudinal reinforcements.

[0011] The movable stopper is L-shaped, and a vertical portion thereof is against the inner side surface of the memorial arch column, and a pad is arranged between the vertical portion and the inner side surface of the memorial arch column.

[0012] The positioning mechanism includes a positioning block and a positioning rod. The two positioning blocks are located in the middle of the upper plate surface and close to the long side of the bottom plate. The two positioning blocks are staggered. The positioning rod is parallel to the wide side of the bottom plate. The positioning block is provided with a through threaded hole. The positioning block is threadedly connected to the positioning rod. The outer ends of the two positioning rods are respectively in contact with the inner side surfaces of the upper cross beam and the lower bottom beam of the rolling mill arch.

[0013] The lifting lugs are located at the edges of the long sides of the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view of an embodiment of the present invention;

[0015] Figure 2 yes Figure 1 A top view of

[0016] Figure 3 Schematic diagram of a hoisting device according to an embodiment of the present invention being hoisted into a rolling mill arch;

[0017] Figure 4 2 is a diagram showing the lifting state of the sling according to an embodiment of the present invention.

[0018] In the figure: bottom plate 1; adjustment hole 1-1; base transverse reinforcement 2; base longitudinal reinforcement 3; movable block 4; bolt 5; lifting lug 6; pad 7; positioning block 8; positioning rod 9; rolling mill arch 10; column 10-1; upper crossbeam 10-2; lower bottom beam 10-3; shackle 11; wire rope 12. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings and examples.

[0020] See also Figure 1 、 Figure 2 This embodiment is a rolling mill arch unloading hoist, primarily consisting of a base plate 1, base transverse reinforcement 2, base longitudinal reinforcement 3, movable blocks 4, lifting lugs 6, and a positioning mechanism. The base plate 1 is rectangular, with a width less than the width of the rectangular opening in the rolling mill arch 10 and a length greater than the width of the rectangular opening. The lower surface of the base plate 1 is welded with three base transverse reinforcements 2 and three base longitudinal reinforcements 3.

[0021] Four lifting lugs 6 are symmetrically welded to the inner side of the long sides of the upper surface of the base plate 1. The lifting lugs 6 are located at the edges of the long sides and are connected to the rope loops at the lower ends of the wire ropes 12 via shackles 11. Four movable blocks 4 are symmetrically installed at both ends of the wide side of the base plate 1. The movable blocks 4 are L-shaped, and the horizontal portions of the movable blocks 4 are connected to the adjustment holes 1-1 of the base plate 1 via two bolts. The adjustment holes 1-1 are arranged in multiple groups along the length of the base plate 1. The wide side of the base plate 1 outside the movable blocks 4 is used to support the columns 10-1 of the rolling mill arch 10. The vertical portions of the movable blocks 4 are against the inner side surfaces of the columns 10-1 of the rolling mill arch 10. A pad 7 is placed between the vertical portion and the column 10-1. The thickness and number of the pads 7 are selected based on the distance between the column 10-1 and the vertical portion.

[0022] The upper surface of the base plate 1 is equipped with a positioning mechanism consisting of positioning blocks 8 and positioning rods 9. Two positioning blocks 8 are welded to the base plate 1. The positioning blocks 8 are located in the middle of the base plate 1, close to the long sides, and are staggered. The positioning rods 9 are parallel to the wide sides of the base plate 1. The positioning blocks 8 have threaded holes extending through them. The positioning blocks 8 are threadedly connected to the positioning rods 9. The outer ends of the two positioning rods 9 abut the inner surfaces of the upper crossbeam 10-2 and lower bottom beam 10-3 of the mill arch 10, respectively. The positioning mechanism is used to adjust the center of gravity of the spreader so that the center of gravity of the spreader coincides with the center of gravity of the mill arch 10.

[0023] The usage process of this embodiment is as follows: when loading the rolling mill arch 10, it is placed flat on the trailer in strict accordance with the requirements of the sling, and the height of the padding is greater than the overall thickness of the sling. The position of the movable block 4 is adjusted according to the width of the rectangular hole of the rolling mill arch 10, and the four lifting ears 6 of the sling are connected to the lower ends of the four steel ropes 12 through the shackles 11. The upper ends of the steel ropes 12 are hung on the hooks of the lifting machinery to lift the sling; the width direction of the sling is made consistent with the width direction of the rolling mill arch 10, and the sling is placed in the rectangular hole of the rolling mill arch 10. The upper plate surface of the bottom plate 1 is lower than the bottom surface of the rolling mill arch 10, and the sling is rotated 90 degrees so that the wide side of the bottom plate 1 outside the movable block 4 is supported on the rolling mill arch. The bottom surface of the mill arch 10 is adjusted, and the positioning rods 9 are adjusted so that the two ends of the two positioning rods 9 respectively abut the inner sides of the upper cross beam 10-2 and the lower bottom beam 10-3 of the mill arch 10. The position of the sling is adjusted through the positioning mechanism so that the center of gravity of the sling coincides with the center of gravity of the mill arch 10. Shims 7 are placed between the movable stopper 4 and the inner side surface of the mill arch 10 to ensure that the movable stopper 4 is tightly pressed against the column 10-1. After lifting, the wide side of the bottom plate 1 outside the movable stopper 4 lifts the mill arch 10 and the mill arch 10 is moved away from the transport vehicle.

[0024] The present invention has a simple structure, greatly reduces the requirement for the length of the wire rope, and saves the purchase and customization cost; at the same time, the number of personnel required for unloading is reduced, the unloading time is significantly shortened, and the efficiency is greatly improved; the sling can also be reused many times.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent structural changes made using the contents of the present invention description and drawings are included in the scope of the present invention.

Claims

1. A rolling mill arch unloading hoist, comprising a rectangular bottom plate, characterized in that: The width of the bottom plate is smaller than the width of the rectangular hole of the rolling mill archway, and the length of the bottom plate is larger than the width of the rectangular hole of the rolling mill archway; Four lifting ears are symmetrically provided on the inner sides of the two long sides of the bottom plate, and movable stops with L-shaped cross-sections are symmetrically provided on both ends of the wide side of the bottom plate. The bottom plate is provided with multiple adjustment holes, and the horizontal parts of the movable stops are detachably connected to the adjustment holes. The vertical parts of the movable stops are against the inner sides of the archway columns, and the wide sides of the bottom plate outside the movable stops are used to support the columns of the rolling mill archway. A positioning mechanism for adjusting the position of the hanger is provided on the bottom plate; The lower surface of the base plate is fixedly connected with a plurality of base transverse reinforcements and base longitudinal reinforcements; The positioning mechanism includes a positioning block and a positioning rod. The two positioning blocks are located in the middle of the upper plate surface and close to the long side of the bottom plate. The two positioning blocks are staggered. The positioning rod is parallel to the wide side of the bottom plate. The positioning block is provided with a through threaded hole. The positioning block is threadedly connected to the positioning rod. The outer ends of the two positioning rods are respectively in contact with the inner side surfaces of the upper cross beam and the lower bottom beam of the rolling mill arch.

2. The rolling mill arch unloading lifting device according to claim 1, characterized in that: A pad is arranged between the vertical portion of the movable stopper and the inner side surface of the memorial archway column.

3. The rolling mill arch unloading lifting device according to claim 1, characterized in that: The lifting lugs are located at the edges of the long sides of the bottom plate.

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