Sliding device and replacement method for the top gearbox of a blast furnace

Abstract

A sliding device for a blast furnace top gearbox, comprising a main frame body, rollers located on both sides of the main frame body, and a gearbox fixing part located under the main frame body: at least two of the rollers are arranged on each side of the main frame body, and a limiting part is arranged only on the rollers on one side, and the limiting part confines the rollers to roll on the guide rail; the sliding device has the following beneficial effects: the fixing part of the gearbox is arranged on the main frame body with an integrated structure, and rollers are arranged on the main frame body, ensuring that the fixing part of the gearbox can slide synchronously and stably on the track; at the same time, for the rollers arranged on both sides of the main frame body, an annular groove is arranged only on the outer circumferential surface of the rollers on one side, which can not only ensure that the rollers are confined to roll on the guide rail, but also ensure the smooth movement of the main frame body on the guide rail.

Description

Technical Field

[0001] The present invention relates to the field of blast furnaces, and particularly to a sliding device and replacement method for a gearbox at the top of a blast furnace. Background Art

[0002] The gearbox is an important device at the top of a blast furnace. Its main function is to fix the distributing chute and drive the distributing chute to rotate and tilt. Its functional state affects the distribution of materials and thus affects the smooth operation of the blast furnace. The gearbox operates under high temperature and high dust conditions for a long time, and problems will occur, and it needs to be replaced as a whole during the regular maintenance time.

[0003] The gearbox is in the mezzanine about 50 meters above the furnace top and weighs about 35t. It cannot be directly hoisted and must be first slid to the hoisting position and then hoisted by a crane. Currently, during replacement, several cathead cranes are hung upside down on the upper track for sliding. However, this method has certain safety hazards. If the cathead cranes are unevenly stressed or do not move in unison, and a certain cathead crane is overstressed, it is very easy to cause derailment or chain breakage, resulting in major problems. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the present invention is to provide a device with simple operation and structure.

[0005] The present invention provides a sliding device for a gearbox at the top of a blast furnace, including a main frame body, rollers on both sides of the main frame body, and a gearbox fixing part under the main frame body: at least two rollers are provided on each side of the main frame body, and a limiting part is provided on only one side of the rollers, and the limiting part confines the rollers to roll on the guide rail.

[0006] Preferably, the limiting part is an annular groove provided on the outer circumferential surface of the roller. When the roller rolls on the guide rail, the guide rail is located in the annular groove.

[0007] Preferably, the main frame body includes a number of load-bearing beams connected to each other.

[0008] Preferably, at least one traction part is provided at the front end of the sliding device, and the traction part is connected to an external power source.

[0009] Preferably, the gearbox fixing part is a number of lifting points, and the gearbox is fixed to the lifting points through a connecting part.

[0010] Preferably, a number of traveling wheels are provided under the sliding device for the transportation of the sliding device itself.

[0011] A transportation method for the top gearbox of a blast furnace includes the following steps: S1. Detach the gearbox from the blast furnace and fix the gearbox on the fixing part; S2. Place the sliding device with the gearbox on the track and tow the sliding device to slide to a predetermined position.

[0012] As described above, a sliding device for the top gearbox of a blast furnace according to the present invention has the following beneficial effects: The fixing part of the gearbox is arranged on the main frame body with an integrated structure, and rollers are arranged on the main frame body, ensuring that the fixing part of the gearbox can slide synchronously and stably on the track; at the same time, the rollers arranged on both sides of the main frame body, only the outer circumferential surface of the rollers on one side is provided with an annular groove, which can not only ensure that the rollers are limited to roll on the guide rail, but also ensure the stable movement of the main frame body on the guide rail. Description of the Drawings

[0013] Figure 1 It is the guide rail of the top of the blast furnace in the prior art.

[0014] Figure 2 It is a schematic structural diagram of a sliding device for the top gearbox of a blast furnace in the present invention.

[0015] Figure 3 It is another schematic structural diagram of a sliding device for the top gearbox of a blast furnace in the present invention.

[0016] Description of the Reference Numerals:

[0017] 100, main frame body; 110, load-bearing beam; 200, roller; 210, annular groove; 300, towing part; 400, lifting point; 500, traveling wheel; 600, guide rail. Detailed Embodiments

[0018] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0019] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0020] As shown in Figure 1 , Figure 2 and Figure 3 shown, the present invention provides a sliding device for a blast furnace top gear box, including a main frame 100, rollers 200 located on both sides of the main frame 100, and a gear box fixing part located under the main frame 100: at least two rollers 200 are arranged on each side of the main frame 100, and a limiting part is arranged on the rollers 200 on only one side, and the limiting part confines the rollers 200 to roll on the guide rail 600. In the prior art, a sliding track for sliding the blast furnace top gear box is originally provided on the blast furnace top to a predetermined platform, and the sliding track is composed of two parallel guide rails 600, and the two guide rails 600 are spaced and suspended.

[0021] When using this sliding device to transport the gear box, first, detach the gear box from the blast furnace and fix the gear box on the fixing part; then place the sliding device with the gear box on the track and tow the sliding device to slide to a predetermined position. During the transportation of the gear box, it is suspended on the fixing part and is located between the two guide rails 600 in a suspended state. Setting the fixing part of the gear box on the integrally structured main frame 100 and arranging rollers 200 on the main frame 100 ensure that the fixing part of the gear box can slide synchronously and smoothly on the track.

[0022] As shown in Figure 2 and Figure 3 shown, further, the limiting part is an annular groove 210 provided on the outer circumferential surface of the roller 200. The limiting part is an annular groove 210 provided on the outer circumferential surface of the roller 200. When the roller 200 rolls on the guide rail 600, the guide rail 600 is located in the annular groove 210. Since the track is exposed to the open air for a long time, the cleaning condition of the guide rail 600 is not very good. Using the form of the annular groove 210 adapted to the guide rail 600 for limiting has a simple structure. During the sliding process, the two rollers 200 on both sides cannot ensure that they are always perpendicular to the guide rail 600. If annular grooves 210 are provided on both rollers 200 on both sides and the two rollers 200 on both sides deviate, the rollers 200 will directly get stuck on the guide rail 600, resulting in the inability of the sliding device to move. Therefore, only the rollers 200 on one side of the main frame 100 are provided with annular grooves 210.

[0023] As shown in Figure 2 and Figure 3 shown, wherein the main frame 100 is an integrally structured body. Specifically, the main frame 100 includes a number of load-bearing beams 110 connected to each other. The main frame 100 spliced by the load-bearing beams 110 has a simple structure and is convenient for processing. After processing, strength verification is still required to ensure the safety of this tool.

[0024] At least one traction part 300 is provided at the front end of the main frame body 100, and the traction part 300 is connected to external power. In this embodiment, three traction parts 300 are provided. For the middle one, an electric winch is used for traction. If the traction force is insufficient, hoists are hung on both sides for auxiliary traction.

[0025] The gearbox fixing parts are several lifting points 400, and the gearbox is fixed on the lifting points 400 through a connecting part. An electric hoist can be used as the connecting part. Since there is a gap and the two guide rails 600 are suspended, an electric hoist can be used to connect the gearbox to the main frame body 100, and the gearbox slides along the track. Preferably, in this embodiment, four lifting points 400 are evenly distributed at the bottom of the main frame body 100.

[0026] As Figure 2 and Figure 3 shown, several traveling wheels 500 are provided below the sliding device for the transportation of the sliding device itself. Specifically, the wheelbase of the traveling wheels 500 is consistent with the track spacing on the cloth chute layer platform. When the sliding device is idle, it can be placed on the track on the cloth chute layer platform for pushing.

[0027] As Figure 1 、 Figure 2 and Figure 3 shown, a transportation method for a blast furnace top gearbox includes the following steps: S1. Detach the gearbox from the blast furnace and connect and fix the gearbox to the lifting points 400 through a connecting part; S2. Place the sliding device with the gearbox on the guide rail 600 and tow the sliding device to slide to a predetermined position. Specifically, use the blast furnace top traveling crane to hoist the sliding device onto the original sliding track, use the towing device to connect to the traction part 300, and tow the sliding trolley to directly above the gearbox. Connect 4 electric hoists to the lifting points 400 respectively, lower the electric hoists until they are connected to the gearbox lifting points, adjust the 4 electric hoists to the stressed state respectively, and run the 4 electric hoists simultaneously until the gearbox is lifted to the sliding position. At the same time, tow the sliding device to the position where the traveling crane can hoist it, and use the top traveling crane of the furnace to hoist the whole composed of the sliding device and the gearbox to the top large platform to complete the removal of the old gearbox.

[0028] The above embodiments only illustratively explain the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A sliding device for a blast furnace top gearbox, characterized in that It includes a main frame (100), rollers (200) located on both sides of the main frame (100), and a gearbox fixing part located under the main frame (100): at least two of the rollers (200) are provided on each side of the main frame (100), and a limiting part is provided only on the rollers (200) on one side, and the limiting part confines the rollers (200) to roll on a guide rail (600); the limiting part is an annular groove (210) provided on the outer circumferential surface of the roller (200), and when the roller (200) rolls on the guide rail (600), the guide rail (600) is located within the annular groove (210); the main frame (100) is an integrated structure including a number of load-bearing beams (110) connected to each other; at least one traction part (300) is provided at the front end of the sliding device, and the traction part (300) is connected to an external power source.

2. The sliding device of a blast furnace top gearbox according to claim 1, characterized in that, The gearbox fixing part is a number of lifting points (400), and the gearbox is fixed on the lifting points (400) through a connecting part.

3. The slip device of a blast furnace top gearbox according to claim 1, characterized in that, A number of traveling wheels (500) are provided below the sliding device for transporting the sliding device itself.

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