Lifting device and method for lifting lug-free rolling mill housing

Abstract

The invention relates to the technical field of equipment installation, in particular to a lifting lug-free rolling mill housing hoisting device and method.The lifting lug-free rolling mill housing hoisting device comprises a first workpiece and a second workpiece, the first workpiece comprises a first vertical plate, first connecting plates are symmetrically arranged at the two ends of one side of the first vertical plate, and first connecting flanges are arranged at the positions, away from the first vertical plate, of the first connecting plates; a transverse plate is arranged on the other side of the vertical plate I; the second workpiece comprises a second vertical plate, second connecting plates are symmetrically arranged at the two ends of one side of the second vertical plate, second connecting flanges are arranged at the positions, away from the second vertical plate, of the second connecting plates, and trunnions are arranged on the other side of the second vertical plate. The first workpiece and the second workpiece are connected through a bolt penetrating through the first connecting flange and the second connecting flange after being buckled. A detachable hoop type structure is adopted to be connected with the stand column of the rolling mill housing, the problem that the rolling mill housing is not provided with a lifting lug is solved, meanwhile, a lifting point is moved downwards, and the length of a steel wire rope between lifting equipment and the highest point of the rolling mill housing is effectively shortened.

Description

Technical Field

[0001] The invention relates to the technical field of equipment installation, and in particular to a hoisting device and method for a rolling mill arch without lifting ears. Background Art

[0002] In modern production, hoisting operations are like an invisible bond that closely connects huge production equipment with precise process flows, and its importance is self-evident. Especially in workshops that need to handle heavy and large-sized equipment, such as the rolling mill arches of steel smelters, the huge size and heavy weight of these equipment make hoisting operations an indispensable part of the production process. This type of equipment is not only large in size, but also has no lifting lugs on it, so it cannot be directly hoisted. The conventional practice is to hoist the wire rope by tying it with a crane hook. Since the design of the crane hook is often higher than the top of the equipment, or the balance beam used to maintain stability during the hoisting process will also occupy a certain height space, this puts strict requirements on the height of the workshop. In some old or space-limited workshops, this height restriction often leads to insufficient hoisting height and limited hoisting space, which brings great pressure to production progress and personnel safety. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a lifting device and method for a rolling mill arch without lifting ears, so as to achieve the technical effect of solving the problem of insufficient lifting height of the rolling mill arch and effectively shortening the length of the wire rope between the hook and the highest point of the equipment.

[0004] To achieve this technical purpose, the present invention adopts the following scheme: A lifting device for a rolling mill arch without lifting ears, comprising a workpiece 1 and a workpiece 2, wherein the workpiece 1 comprises a vertical plate 1, one side of the vertical plate 1 is symmetrically provided with a connecting plate 1 at both ends thereof, and a connecting flange 1 is provided at a position of the connecting plate 1 away from the vertical plate 1; a transverse plate is provided on the other side of the vertical plate 1; The second workpiece includes a second vertical plate, one side of the second vertical plate is symmetrically provided with a second connecting plate at both ends thereof, a second connecting flange is provided at a position of the second connecting plate away from the second vertical plate, and a trunnion is provided on the other side of the second vertical plate; After the workpiece 1 and the workpiece 2 are buckled, they are connected by bolts penetrating the connecting flange 1 and the connecting flange 2.

[0005] Compared with the prior art, the present invention has the following beneficial effects: The device is simple to manufacture and adopts a detachable clamp-type structure to be connected with the columns of the rolling mill arch, which solves the problem that the rolling mill arch has no lifting ears. At the same time, the lifting point is moved downward, which effectively shortens the length of the wire rope between the lifting equipment and the highest point of the rolling mill arch, reducing the construction difficulty.

[0006] Further, the preferred embodiment adopted by the present invention is: An arc plate is arranged between the horizontal plate and the vertical plate.

[0007] A stiffening plate 1 is arranged between the two ends of the vertical plate 1 and the connecting plate 1.

[0008] The two connecting plates 2 extend toward one side of the ear shaft, and a vertical plate 3 is arranged between the extending ends of the two connecting plates 2, and a stiffening plate 2 is arranged between the two ends of the vertical plate 3 and the connecting plates 2 at their respective corresponding ends.

[0009] The present invention also relates to a method for hoisting a rolling mill arch without lifting lugs, which is carried out according to the following steps: S1. Make workpiece To make workpiece 1 and workpiece 2, except for the curved plate which is cut from steel pipe and the trunnion which is cut from round steel, the other components are cut from steel plates. After cutting, the components are welded accordingly; S2, hoisting equipment S21. When hoisting equipment with small weight and low hoisting requirements Use workpiece 1 alone, clamp workpiece 1 at the two inner right angles on the upper part of the rolling mill arch, use wire rope to wrap around the corner guard and the curved plate of workpiece 1, and then lock it with the equipment column with the help of lifting wire rope; S21. When hoisting equipment that is heavy and has high hoisting requirements The workpiece 1 and the workpiece 2 are enclosed together to enclose the column of the rolling mill arch, and the connecting flange 1 and the connecting flange 2 are connected by bolts, and the hoisting wire rope is connected to the trunnion; S3. The hoisting equipment is started to lift the rolling mill arch.

[0010] The method improves the hoisting efficiency of the rolling mill arch, greatly shortens the hoisting operation time, and also effectively solves the problem of insufficient hoisting height of the rolling mill arch. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of workpiece 1; Figure 2 for Figure 1 The main view; Figure 3 It is the structural schematic diagram of workpiece 2; Figure 4 It is a schematic diagram of using workpiece one for individual lifting; Figure 5 It is a schematic diagram of hoisting using workpiece 1 and workpiece 2; The markings in the figure are: 1, workpiece one; 1-1, horizontal plate; 1-2, vertical plate one; 1-3, curved plate; 1-4, connecting plate one; 1-5, connecting flange one; 1-6, stiffening plate one; 2, workpiece two; 2-1, vertical plate two; 2-2, vertical plate three; 2-3, ear shaft; 2-4, connecting plate two; 2-5, stiffening plate two; 2-6, connecting flange two. DETAILED DESCRIPTION

[0012] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0013] A lifting device for a rolling mill arch without lifting ears comprises a workpiece 1 and a workpiece 2, wherein the workpiece 1 comprises a vertical plate 1-2, one side of the vertical plate 1-2 is symmetrically welded with connecting plates 1-4 at both ends thereof, and a connecting flange 1-5 is welded to the connecting plate 1-4 at a position away from the vertical plate 1-2; a plurality of stiffening plates 1-6 are welded between the two ends of the vertical plate 1-2 and the connecting plate 1-4.

[0014] A horizontal plate 1-1 is welded to the top of the other side of the vertical plate 1-2, and an arc plate 1-3 is welded between the bottom of the horizontal plate 1-1 and the vertical plate 1-2, and the arc plate 1-3 forms a 45-degree angle between the horizontal plate 1-1 and the vertical plate 1-2.

[0015] Workpiece 2 includes a vertical plate 2-1, one side of which is symmetrically welded with connecting plates 2-4 at both ends, and a connecting flange 2-6 is welded on the connecting plate 2-4 away from the vertical plate 2-1. Workpiece 1 and workpiece 2 can form a clamping structure by buckling the connecting flange 1-5 and the connecting flange 2-6.

[0016] An ear shaft 2-3 is provided on the other side of the vertical plate 2-1, and two connecting plates 2-4 extend to one side of the ear shaft 2-3 respectively. The extended ends of the two connecting plates 2-4 are connected and fixed by the vertical plate 3 2-2. The ear shaft 2-3 passes through the center of the vertical plate 3 2-2 and is fixedly welded to the vertical plate 2-1 and the vertical plate 3 2-2 respectively.

[0017] Stiffening plates 2-5 are welded between the two ends of the vertical plate 3 2-2 and the connecting plates 2-4 at their corresponding ends.

[0018] Based on the above structure, when hoisting the rolling mill arch, follow the steps below: S1. Make workpiece Workpiece 1 is mainly composed of horizontal plate 1-1, vertical plate 1-2, curved plate 1-3, stiffening plate 1-6, connecting plate 1-4 and connecting flange 1-5. Except for the curved plate 1-3 which is made of thick-walled round steel pipe, the other parts are cut from steel plates. After cutting, the parts are welded into one. The width of the vertical plate 1-2 is equal to the width of the equipment column.

[0019] Workpiece 2 is mainly composed of vertical plate 2-1, vertical plate 3 2-2, ear shaft 2-3, connecting plate, stiffening plate 2-5 and connecting flange 2-6. Except ear shaft 2-3 which is made of thick-walled steel pipe, the other parts are made of steel plate gas cutting. After cutting, the parts are welded together.

[0020] S2. Hoisting equipment S21. When hoisting equipment with small weight and low hoisting requirements like Figure 4 As shown, two workpieces 1 are used separately. After the workpiece 1 is clamped at the two inner right-angled parts on the upper part of the rolling mill arch, a steel wire rope is directly used to surround the corner guard and the arc plate 1-3 of the workpiece 1, and then it is locked with the equipment column by means of a lifting steel wire rope.

[0021] S22. When hoisting equipment that is heavy and has high hoisting requirements like Figure 5 As shown, workpiece 1 and workpiece 2 are used to enclose the column of the rolling mill arch, and the connecting flange 1-5 and the connecting flange 2-6 are connected by high-strength bolts, so that workpiece 1 and workpiece 2 hold the equipment column tightly; one end of the lifting wire rope is connected to the ear shaft 2-3, and the other end is connected to the lifting equipment.

[0022] S3. Connect the lifting wire rope to the balance beam, and use the hooks of two overhead cranes to connect the two ends of the balance beam to complete the lifting.

[0023] The structure of workpiece 1 and workpiece 2 in the present invention is simple and easy to manufacture. The biggest advantage is that it solves the problem of insufficient hoisting height of the rolling mill arch and effectively shortens the length of the wire rope between the hook and the highest point of the equipment. The device can also be moved on the equipment column to adjust the position according to actual needs. In addition, the present invention solves the problem that the rolling mill arch is not designed with lifting ears through the detachable clamp-type workpiece 1 and workpiece 2, and adds temporary lifting ears to the equipment. Workpiece 1 is provided with a special corner guard for binding the wire rope. The diameter of the corner guard is equal to the thickness of the equipment. The large arc corner guard fully protects the wire rope from cutting and satisfies the inclined binding of the wire rope. Compared with the traditional steel pipe corner guard, when the load weight is large, it plays a perfect protective role and effect on the wire rope. The ear shaft-shaped lifting ear can be rotated at any angle when the rolling mill arch is lifted and turned over, so that the lifting point is evenly stressed, safe and stable.

[0024] Finally, it should be noted that the above-listed embodiments are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A hoisting device for a rolling mill arch without lifting ears, characterized in that: The workpiece 1 comprises a vertical plate 1, one side of the vertical plate 1 is symmetrically provided with a connecting plate 1 at both ends thereof, and a connecting flange 1 is provided at a position of the connecting plate 1 away from the vertical plate 1; and a horizontal plate is provided on the other side of the vertical plate 1; The second workpiece includes a second vertical plate, one side of the second vertical plate is symmetrically provided with a second connecting plate at both ends thereof, a second connecting flange is provided at a position of the second connecting plate away from the second vertical plate, and a trunnion is provided on the other side of the second vertical plate; After the workpiece 1 and the workpiece 2 are buckled, they are connected by bolts penetrating the connecting flange 1 and the connecting flange 2.

2. The hoisting device for the rolling mill arch without lifting lugs according to claim 1 is characterized in that: An arc plate is arranged between the horizontal plate and the vertical plate.

3. The hoisting device for the rolling mill arch without lifting lugs according to claim 2 is characterized in that: A stiffening plate 1 is arranged between the two ends of the vertical plate 1 and the connecting plate 1.

4. The hoisting device for the rolling mill arch without lifting lugs according to claim 1 is characterized in that: The two connecting plates 2 extend toward one side of the ear shaft, and a vertical plate 3 is arranged between the extending ends of the two connecting plates 2. Stiffening plates 2 are arranged between the two ends of the vertical plate 3 and the connecting plates 2 at their corresponding ends.

5. A method for hoisting a rolling mill arch without lifting ears as claimed in any one of claims 1 to 4, characterized in that: Follow these steps: S1. Make workpiece To make workpiece 1 and workpiece 2, except for the curved plate which is cut from steel pipe and the trunnion which is cut from round steel, the other components are cut from steel plates. After cutting, the components are welded accordingly; S2, hoisting equipment S21. When hoisting equipment with small weight and low hoisting requirements Use workpiece 1 alone, clamp workpiece 1 at two inner right angles on the upper part of the rolling mill arch, use wire rope to wrap around the corner guard and the curved plate of workpiece 1, and then lock it with the equipment column with the help of lifting wire rope, and the lifting wire rope is connected to the lifting equipment; S21. When hoisting equipment that is heavy and has high hoisting requirements The workpiece 1 and the workpiece 2 are used to surround the column of the rolling mill arch, and the connecting flange 1 and the connecting flange 2 are connected by bolts. One end of the lifting wire rope is connected to the trunnion, and the other end is connected to the lifting equipment; S3. The hoisting equipment is started to lift the rolling mill arch.

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