A device for quick replacement of a bearing of a large ladle turret of a large continuous caster

Abstract

A device for quick replacement of the bearing of the large ladle rotary table of a large continuous casting machine, characterized in that it comprises a lifting frame (1), a flange-equipped hydraulic jack (2), a lifting buckle (3), a safety support (4), a lifting sling (5), a continuous casting machine large ladle rotary table bearing sliding beam (6), and a continuous casting machine large ladle rotary table bearing sliding beam transverse moving trolley (7); the flange-equipped hydraulic jack (2) is bolted to the bottom of the lifting frame (1), the safety support (4) is bolted to the bottom of the lifting frame (1), and the lifting sling (5) is connected to the bottom of the lifting frame (1) by the lifting buckle (3); the continuous casting machine large ladle rotary table bearing sliding beam transverse moving trolley (7) is placed on the continuous casting machine middle ladle trolley track, and the continuous casting machine large ladle rotary table bearing sliding beam (6) is welded and fixed to the continuous casting machine large ladle rotary table bearing sliding beam transverse moving trolley (7). The device has the advantages of simple use, low maintenance and construction cost, and high safety.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of large-scale continuous casting machine ladle turret bearing replacement, and particularly relates to a device for quickly replacing the bearing of a large-scale continuous casting machine ladle turret, which can use a hydraulic lifting device of the upper structure of the ladle turret arranged on a steel structure overhead traveling beam above the ladle turret, and use a method of arranging a bearing sliding beam of the continuous casting machine ladle turret under the upper structure of the ladle turret hoisted by using a track of a trolley of a continuous casting machine intermediate ladle. The device is suitable for the bearing maintenance and replacement construction of a large-scale continuous casting machine ladle turret whose process position is directly below the overhead traveling beam. BACKGROUND

[0002] The general structure of the ladle turret is as shown in Figure 1 .

[0003] The bearing of the large-scale continuous casting machine ladle turret is located inside the rotating gear of the ladle turret at position A in the figure, and the form is as shown in Figure 2 .

[0004] In order to replace the bearing of the continuous casting machine ladle turret, all the components of the upper structure of the ladle turret need to be removed. In the process design of the steel smelting plant of the steel smelting enterprise, the continuous casting machine ladle turret is entirely located directly below the column line steel structure overhead traveling beam between the molten steel span and the molten steel pouring span of the main plant of the steelmaking plant, so the removal and hoisting of all the components of the upper structure of the ladle turret cannot be directly performed by using the main plant bridge crane, and the components of the upper structure of the ladle turret are numerous, and have large size and mass. The common methods in the existing bearing replacement work of the large-scale continuous casting machine ladle turret are as follows: 1. using two bridge cranes of the molten steel span and the molten steel pouring span of the main plant of the steelmaking plant to hoist a hoisting beam, and using the hoisting beam to remove and hoist all the components of the upper structure of the ladle turret, and then using the hoisting beam to remove and hoist the bearing of the continuous casting machine ladle turret; 2. setting a jack under the upper structure of the continuous casting machine ladle turret, lifting the upper structure of the continuous casting machine ladle turret upward, then setting a sliding beam between the upper structure of the continuous casting machine ladle turret and the lower base of the continuous casting machine ladle turret by using the bridge crane of the molten steel pouring span, and then sliding the bearing of the continuous casting machine ladle turret along the sliding beam to the molten steel pouring span of the main plant of the steelmaking plant. The method 1 occupies more main plant bridge cranes for the maintenance and replacement construction of the already put-into-production ladle turret, and has a long impact on the traveling time, and has a large impact on the production. The method 2 has the following problems: since the bearing of the continuous casting machine ladle turret is circular, the jack setting positions are relatively average with the included angle of the line connecting the center point of the bearing of the continuous casting machine ladle turret, so the jack hinders the sliding of the bearing of the continuous casting machine ladle turret; if the jack setting positions are relatively small with the included angle of the line connecting the center point of the bearing of the continuous casting machine ladle turret, and the center of gravity of the upper structure of the ladle turret is higher than the support positions, the stability of the upper structure of the ladle turret after being lifted and supported is poor, which may cause the safety accident of the overturning of the whole equipment and the damage to the safety of the construction personnel.

[0005] In summary, in order to find a large package of large-scale continuous casting machine rotary table bearing replacement construction method, the technical personnel carefully study the steel smelting enterprise smelting plant equipment process layout, and the tooling facility for large package of large-scale continuous casting machine rotary table bearing replacement is invented. SUMMARY

[0006] The purpose of the present application is to provide a device for large package of large-scale continuous casting machine rotary table bearing replacement, which overcomes the safety hazards and other problems of the prior art.

[0007] The present application comprises a lifting frame 1, a flange-equipped hydraulic jack 2, a lifting buckle 3, a safety support 4, a lifting sling 5, a continuous casting machine ladle rotary table bearing sliding beam 6, and a continuous casting machine ladle rotary table bearing sliding beam transverse moving trolley 7. The flange-equipped hydraulic jack 2 is bolted to the bottom of the lifting frame 1, the safety support 4 is bolted to the bottom of the lifting frame 1, and the lifting sling 5 is connected to the bottom of the lifting frame 1 using the lifting buckle 3. The continuous casting machine ladle rotary table bearing sliding beam transverse moving trolley 7 is placed on the continuous casting machine ladle trolley track, and the continuous casting machine ladle rotary table bearing sliding beam 6 is welded and fixed to the continuous casting machine ladle rotary table bearing sliding beam transverse moving trolley 7.

[0008] One lifting frame 1 is placed on the main plant steel structure head beam, several safety supports 4 are made, two continuous casting machine ladle rotary table bearing sliding beams 6 are made, and one continuous casting machine ladle rotary table bearing sliding beam transverse moving trolley 7 is made. Four flange-equipped hydraulic jacks 2, eight lifting buckles 3, and four lifting slings 5 are prepared.

[0009] The advantages and positive effects of the present application are:

[0010] (1) simple to use;

[0011] (2) relatively large-scale removal of ladle rotary table upper structure parts is economical, time-saving, and low in mechanical cost; that is, it can save the economic, time, and mechanical costs required for the work of the continuous casting machine ladle rotary table bearing;

[0012] (3) compared with the safety of the jacking device set below the continuous casting machine ladle rotary table upper structure, the construction danger is reduced.

[0013] DESCRIPTION OF DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the ladle rotary table structure.

[0015] Figure 2 is Figure 1 A point cross-sectional view.

[0016] Figure 3It is the elevation view of the environment around the ladle turret of the continuous casting machine and the elevation view of the specific embodiment.

[0017] Figure 4 It is the section view of the environment around the ladle turret of the continuous casting machine and the section view of the specific embodiment.

[0018] Figure 5 It is the elevation view of the hydraulic lifting device of the upper structure of the ladle turret.

[0019] Figure 6 It is the section view of the hydraulic lifting device of the upper structure of the ladle turret.

[0020] Figure 7 It is the front view of the lifting frame 1.

[0021] Figure 8 It is the side view of the lifting frame 1.

[0022] Figure 9 It is the top view of the lifting frame 1.

[0023] Figure 10 It is the front view of the safety support 3.

[0024] Figure 11 It is the side view of the safety support 3.

[0025] Figure 12 It is the front view of the bearing sliding beam transverse trolley 7 of the ladle turret of the continuous casting machine.

[0026] Figure 13 It is the side view of the bearing sliding beam transverse trolley 7 of the ladle turret of the continuous casting machine.

[0027] In the figure, the lifting frame 1, the hydraulic jack 2 with a flange on the base, the lifting buckle 3, the safety support 4, the lifting sling 5, the bearing sliding beam 6 of the ladle turret of the continuous casting machine, the bearing sliding beam transverse trolley 7 of the ladle turret of the continuous casting machine, the steel structure crown block beam 8, the upper structure 9 of the ladle turret, and the bearing 10 of the ladle turret. Specific embodiment

[0028] The present application comprises a lifting frame 1, a hydraulic jack 2 with a flange on the base, a lifting buckle 3, a safety support 4, a lifting sling 5, a bearing sliding beam 6 of the ladle turret of the continuous casting machine, and a bearing sliding beam transverse trolley 7 of the ladle turret of the continuous casting machine; the hydraulic jack 2 with a flange on the base is fixed to the bottom of the lifting frame 1 by bolts, the safety support 4 is fixed to the bottom of the lifting frame 1 by bolts, and the lifting sling 5 is connected to the bottom of the lifting frame 1 by the lifting buckle 3; the bearing sliding beam transverse trolley 7 of the ladle turret of the continuous casting machine is placed on the trolley track of the middle ladle turret of the continuous casting machine, and the bearing sliding beam 6 of the ladle turret of the continuous casting machine is fixedly welded to the bearing sliding beam transverse trolley 7 of the ladle turret of the continuous casting machine. The replacement construction steps are as follows:

[0029] (1) The base flange hydraulic jack 2 is fixed to the bottom of the lifting frame 1 by bolts, the safety support 4 is fixed to the bottom of the lifting frame 1 by bolts, and the lifting sling 5 is connected to the bottom of the lifting frame 1 by the lifting buckle 3. Then the combined assembly is arranged on the steel structure crown block beam 8 above the tundish rotary table.

[0030] (2) After the lifting sling 5 is lowered to pass through the brake plate between the steel structure crown block beam 8, the upper structure 9 of the tundish rotary table is hung.

[0031] (3) After removing the connecting bolts between the tundish rotary table bearing 10 and the lower base of the tundish rotary table, the base flange hydraulic jack 2 is started to lift the lifting frame 1 upward, driving the upper structure 9 of the tundish rotary table and the tundish rotary table bearing 10 upward. After the upper structure 9 of the tundish rotary table is lifted to a certain height, the safety support 4 is arranged below the original safety support 4 installed below the lifting frame 1, and the safety support 4 is connected with the original safety support 4 installed below the lifting frame 1 by bolts.

[0032] (4) If the lifting height of the upper structure 9 of the tundish rotary table is insufficient, after the safety support 4 is arranged below the original safety support 4 installed below the lifting frame 1, the height of the base flange hydraulic jack 2 is lowered, and the combined assembly of the lifting frame 1 and the safety support 4 is lowered on the steel structure crown block beam 8. Then the safety support 4 is arranged below the base flange hydraulic jack 2, and then the base flange hydraulic jack 2 is elongated again to lift the lifting frame 1 upward, driving the upper structure 9 of the tundish rotary table upward. Repeat the above steps until the upper structure 9 of the tundish rotary table is lifted to the preset height.

[0033] (5) Before step 1, the continuous casting machine tundish rotary table bearing sliding beam transverse trolley 7 is arranged on the tundish trolley track, and the continuous casting machine tundish rotary table bearing sliding beam 6 is arranged and welded on the continuous casting machine tundish rotary table bearing sliding beam transverse trolley 7. After the upper structure 9 of the tundish rotary table is lifted to the preset height, the continuous casting machine tundish rotary table bearing sliding beam transverse trolley 7 is moved transversely, so that the continuous casting machine tundish rotary table bearing sliding beam 6 is arranged below the upper structure 9 of the tundish rotary table and the tundish rotary table bearing 10.

[0034] (6) After removing the connecting bolts between the tundish rotary table bearing 10 and the upper structure 9 of the tundish rotary table, the tundish rotary table bearing 10 is made to fall on the continuous casting machine tundish rotary table bearing sliding beam 6, and the tundish rotary table bearing 10 is slid along the continuous casting machine tundish rotary table bearing sliding beam 6 to the continuous casting machine tundish rotary table bearing sliding beam transverse trolley 7. The continuous casting machine tundish rotary table bearing sliding beam transverse trolley 7 is moved away from the continuous casting machine tundish rotary table, and the removal of the tundish rotary table bearing 10 is completed.

[0035] (7) The installation of the large mill turntable bearing 10 is performed in the reverse order of the removal.

Claims

1. A construction method for a quick replacement device for a large ladle turret bearing of a large continuous caster, characterized in that, The replacement device comprises a lifting frame (1), a base flange hydraulic jack (2), a hoisting buckle (3), a safety support (4), a hoisting sling (5), a continuous casting machine ladle turret bearing sliding beam (6), and a continuous casting machine ladle turret bearing sliding beam transverse moving trolley (7); the base flange hydraulic jack (2) is bolted to the bottom of the lifting frame (1), the safety support (4) is bolted to the bottom of the lifting frame (1), and the hoisting sling (5) is connected to the bottom of the lifting frame (1) by the hoisting buckle (3); the continuous casting machine ladle turret bearing sliding beam transverse moving trolley (7) is placed on the continuous casting machine tundish trolley track, and the continuous casting machine ladle turret bearing sliding beam (6) is welded and fixed to the continuous casting machine ladle turret bearing sliding beam transverse moving trolley (7); The replacement construction steps are as follows: (1) the base flange hydraulic jack (2) is bolted to the bottom of the lifting frame (1), the safety support (4) is bolted to the bottom of the lifting frame (1), and the hoisting sling (5) is connected to the bottom of the lifting frame (1) by the hoisting buckle (3), and then the combined part is arranged on the steel structure crown block beam (8) above the ladle turret; (2) after the hoisting sling (5) is lowered to pass through the brake plate between the steel structure crown block beam 8, the upper structure (9) of the ladle turret is hoisted; (3) after the connecting bolt between the ladle turret bearing (10) and the lower base of the ladle turret is removed, the base flange hydraulic jack (2) is started, the lifting frame (1) is lifted upwards, the upper structure 9 of the ladle turret and the ladle turret bearing (10) are lifted upwards, and after the upper structure (9) of the ladle turret is lifted to a certain height, the safety support (4) is arranged below the safety support (4) originally arranged below the lifting frame (1), and the safety support (4) is connected to the safety support (4) originally arranged below the lifting frame (1) by bolts; (4) if the upper structure (9) of the ladle turret is not lifted to a sufficient height, after the safety support (4) is arranged below the safety support (4) originally arranged below the lifting frame (1), the height of the base flange hydraulic jack (2) is lowered, the combined part of the lifting frame (1) and the safety support (4) is lowered on the steel structure crown block beam (8), then the safety support (4) is arranged below the base flange hydraulic jack (2), and then the base flange hydraulic jack (2) is elongated again, the lifting frame (1) is lifted upwards, the upper structure (9) of the ladle turret is lifted upwards, and the process is repeated until the upper structure (9) of the ladle turret is lifted to a preset height. (5) Before step (1) starts, set the continuous casting ladle tundish bearing sliding beam transverse moving trolley (7) on the tundish trolley track, and set the continuous casting ladle tundish bearing sliding beam (6) on the continuous casting ladle tundish bearing sliding beam transverse moving trolley (7); after the tundish upper structure (9) is lifted to a preset height, move the continuous casting ladle tundish bearing sliding beam transverse moving trolley (7) laterally, so that the continuous casting ladle tundish bearing sliding beam (6) is set below the tundish upper structure (9) and the tundish bearing (10); (6) After the connecting bolts between the tundish bearing (10) and the tundish upper structure (9) are removed, make the tundish bearing (10) fall on the continuous casting ladle tundish bearing sliding beam (6), slide the tundish bearing (10) along the continuous casting ladle tundish bearing sliding beam (6) to the continuous casting ladle tundish bearing sliding beam transverse moving trolley (7), and move the continuous casting ladle tundish bearing sliding beam transverse moving trolley (7) to move away from the continuous casting ladle tundish, thereby completing the removal of the tundish bearing (10); (7) The installation of the tundish bearing (10) is in the reverse order of the removal.

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