Transverse suspension cable hoisting maintenance method for field maintenance of electric furnace transformer

Abstract

The invention relates to a transverse suspension cable hoisting maintenance method for field maintenance of an electric furnace transformer, which comprises the following steps of: a, connecting one end of a hoisting steel wire rope with a stand column of a transformer room, and penetrating the other end of the hoisting steel wire rope into the transformer room; b, a hook of a chain block is connected with another stand column of the diagonal line of the transformer room, and a lifting hook of the chain block is connected with the other end of the hoisting steel wire rope; c, the hoisting steel wire rope is tensioned through a chain block; d, hanging a body oil conservator hoisting hoist and two box cover hoisting hoists on the hoisting steel wire rope, hoisting the body oil conservator through the body oil conservator hoisting hoist, and hoisting the transformer box cover through the two box cover hoisting hoists; e, the interior of the transformer is overhauled; the problem that hoisting cannot be carried out due to the fact that no hoisting hole exists above a transformer room on an overhaul site is solved; the device is not limited by space and plants, reduces operators, and is simple to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer maintenance, and specifically refers to a horizontal suspension cable hoisting and maintenance method for on-site maintenance of electric furnace transformers. Background Art

[0002] Electric furnace transformers are widely used in the smelting industry. As the power supply of smelting furnaces, electric furnace transformers are the heart of various smelting furnaces. The installation and use environment of electric furnace transformers is mostly indoors or semi-indoors. During on-site maintenance, due to space and plant restrictions, it is difficult to use large-volume hoisting tools such as cranes and overhead traveling cranes. Currently, most transformer rooms are of steel structure column type, and the transformer structure is of top cover type or semi-bell type. A maintenance method can be designed and developed according to the convenient conditions of the on-site plant structure. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a horizontal suspension cable hoisting and maintenance method for on-site maintenance of electric furnace transformers, which is efficient, safe and reliable, and easy to operate.

[0004] The present invention is realized through the following technical solutions. A horizontal suspension cable hoisting and maintenance method for on-site maintenance of electric furnace transformers is provided, including the following steps: a. Connect one end of the hoisting steel wire rope to a column in the transformer room, and pass the other end of the hoisting steel wire rope into the transformer room; b. Connect the hook of the chain block to another column on the diagonal of the transformer room, and connect the hook of the chain block to the other end of the hoisting steel wire rope; c. Tighten the hoisting steel wire rope through the chain block; d. Suspend the main body oil conservator hoisting chain block and two tank cover hoisting chain blocks on the hoisting steel wire rope. Hoist the main body oil conservator through the main body oil conservator hoisting chain block, and hoist the transformer tank cover through the two tank cover hoisting chain blocks; e. Perform maintenance on the interior of the transformer.

[0005] As an optimization, in step a, the specific steps for connecting the hoisting steel wire rope to the column are: pass one end of the hoisting steel wire rope around the column, and connect the wire rope sleeve at the end of the hoisting steel wire rope to the hoisting steel wire rope through the first U-shaped clamp.

[0006] As an optimization, in step b, the specific steps for connecting the hook of the chain block to the column are: surround the column with the connecting wire rope with wire rope sleeves at both ends, and connect the wire rope sleeves at both ends of the connecting wire rope to the hook of the chain block through the second U-shaped clamp.

[0007] As an optimization, in step d, if it is necessary to repair or replace the switch selector, a switch selector hoisting chain block also needs to be suspended on the hoisting steel wire rope.

[0008] As an optimization, in step d, after lifting the transformer tank cover with two tank cover lifting hoists, a horizontal traction hoist connected to the side of the transformer chamber is erected on the transformer tank cover, and the transformer tank cover is pulled to move horizontally through the horizontal traction hoist.

[0009] The beneficial effects of the present invention are as follows: A horizontal suspension cable lifting and maintenance method for on-site maintenance of electric furnace transformers according to the present invention solves the problem that hoisting cannot be carried out due to the absence of a hoisting hole above the transformer chamber at the maintenance site; it can be unrestricted by space and workshops, reduce the number of operators, and is simple to operate. Just after installing the horizontal suspension cable device and installing the tank cover or the components to be hoisted, operations can be carried out, and the components that do not need to be disassembled can be left intact.

[0010] Reduce the exposure time of the transformer body outside. After maintenance, inspection, and replacement of components, the tank cover can be quickly returned to its position. And during operation, only the required parts need to be opened, and the remaining parts can still be shielded, reducing the entry of pollutants into the body. Description of the Drawings

[0011] Figure 1 is a schematic flow chart of the present invention; Figure 2 is a top view of the maintenance process of the present invention; Figure 3 is a front view of the maintenance process of the present invention; Figure 4 is of the present invention Figure 2 a partial enlarged view of the lower left corner; Figure 5 is of the present invention Figure 2 a partial enlarged view of the upper right corner; As shown in the figure: 1. Transformer chamber, 2. Column, 3. Hoisting steel wire rope, 4. First U-shaped snap ring, 5. Chain hoist, 6. Connecting steel wire rope, 7. Second U-shaped snap ring, 8. Transformer, 9. Horizontal traction hoist, 10. Main body oil conservator hoisting hoist, 11. Tank cover hoisting hoist, 12. Switch selector hoisting hoist. Detailed Embodiments

[0012] To clearly illustrate the technical features of this solution, the following is an elaboration of this solution through specific embodiments.

[0013] As Figures 1 - 5 shown, a horizontal suspension cable lifting and maintenance method for on-site maintenance of electric furnace transformers according to the present invention is applicable to the maintenance of transformers inside a steel structure column-type transformer chamber, and includes the following steps: a. Select the hoisting steel wire rope 3, requiring the lifting capacity to be not less than 5 tons, the length should be selected according to the diagonal length of the transformer chamber, and both ends of the hoisting steel wire rope 3 are provided with wire rope sleeves.

[0014] Select two columns on the diagonal to achieve subsequent connection operations. Connect one end of the hoisting steel wire rope 3 to a column 2 of the transformer chamber 1. As Figure 4 shown, the specific steps are as follows: Pass one end of the hoisting steel wire rope 3 around the column 2, and connect the wire rope sleeve at the end of the hoisting steel wire rope 3 to the hoisting steel wire rope 3 through the first U-shaped snap ring 4. The U-shaped snap ring is also called a U-shaped lifting ring or a U-shaped hanging ring. When connecting, it is required that the wire rope sleeve at the end of the hoisting steel wire rope 3 is connected to the pin (or bolt) of the first U-shaped snap ring 4, and the hoisting steel wire rope 3 fits against the U-shaped bend of the first U-shaped snap ring 4.

[0015] Then pass the other end of the hoisting steel wire rope 3 into the transformer chamber 1 and close to the other column 2 on the diagonal.

[0016] b. Select a manual hoist 5. The hook of the manual hoist 5 is the hook at the upper end of its body, and the lifting hook of the manual hoist 5 is the hook connected to the end of the chain for hoisting items.

[0017] Connect the hook of the manual hoist 5 to the other column 2 on the diagonal of the transformer chamber 1. As Figure 5 shown, the specific steps are as follows: Surround the column 2 with the connecting wire rope 6 with wire rope sleeves at both ends, and connect the wire rope sleeves at both ends of the connecting wire rope 6 to the hook of the manual hoist 5 through the second U-shaped snap ring 7. Among them, the wire rope sleeves at both ends are both connected to the pin (or bolt) of the second U-shaped snap ring 7, and the hook of the manual hoist 5 is connected to the U-shaped bend.

[0018] Connect the lifting hook of the manual hoist 5 to the other end of the hoisting steel wire rope 3. The specific method is that the lifting hook is connected to the wire rope sleeve of the hoisting steel wire rope 3.

[0019] At this time, the hoisting steel wire rope 3 is in a sagging state in the middle.

[0020] c. By pulling the manual hoist 5, shorten the manual hoist 5, so as to tighten the hoisting steel wire rope 3 to meet the hoisting requirements.

[0021] d. If there is no need to repair or replace the switch selector, then hang the main body conservator hoist 10 and two tank cover hoists 11 on the hoisting steel wire rope 3. Hoist the main body conservator through the main body conservator hoist 10, and hoist the transformer tank cover through the two tank cover hoists 11. The tank cover hoist 11 and the conservator hoist 10 can adopt manual hoists, and disassemble the components according to the transformer tank cover disassembly process through the three manual hoists.

[0022] If it is necessary to repair or replace the switch selector, then it is also necessary to hang a switch selector hoist 12 on the hoisting steel wire rope 3. The switch selector hoist 12 also adopts a manual hoist, and disassemble the components according to the transformer tank cover disassembly process through the four manual hoists.

[0023] When hoisting the transformer tank cover with two tank cover hoisting hoists 11, the two tank cover hoisting hoists 11 respectively hoist the two lifting lugs of the transformer tank cover. After the hoisting hoist 11 hoists the transformer tank cover, a horizontal traction hoist 9 connected to the side of the transformer chamber 1 is further erected on the transformer tank cover. The horizontal traction hoist 9 adopts a manual hoist, with one end connected to the transformer tank cover and the other end connected to the side of the transformer chamber 1. The transformer tank cover is pulled to move horizontally through the horizontal traction hoist 9, so that the tank cover is in an unobstructed state when hoisting the switch in the traction state, facilitating the maintenance of the interior of the transformer.

[0024] e. Perform maintenance on the interior of the transformer. After the maintenance work is completed, each component is reset.

[0025] Certainly, the above description is not limited to the above examples. The technical features not described in the present invention can be realized by or adopt the prior art, and will not be elaborated here; the above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not a limitation to the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of the claims of the present invention.

Claims

1. A horizontal suspension cable hoisting and maintenance method for on-site maintenance of electric furnace transformers, characterized in that, It includes the following steps: a. Connect one end of the hoisting steel wire rope (3) to a column (2) in the transformer chamber (1), and pass the other end of the hoisting steel wire rope (3) into the transformer chamber (1); b. Connect the hook of the chain block (5) to another column (2) on the diagonal of the transformer chamber (1), and connect the lifting hook of the chain block (5) to the other end of the hoisting steel wire rope (3); c. Tighten the hoisting steel wire rope (3) through the chain block (5); d. Hang the main body conservator hoisting chain block (10) and two tank cover hoisting chain blocks (11) on the hoisting steel wire rope (3). Hoist the main body conservator through the main body conservator hoisting chain block (10), and hoist the transformer tank cover through the two tank cover hoisting chain blocks (11); e. Repair the inside of the transformer.

2. The on-site maintenance horizontal suspension hoisting maintenance method for an electric furnace transformer according to claim 1, characterized in that: In step a, the specific steps for connecting the hoisting steel wire rope (3) to the column (2) are as follows: Pass one end of the hoisting steel wire rope (3) around the column (2), and connect the wire rope sleeve at the end of the hoisting steel wire rope (3) to the hoisting steel wire rope (3) through the first U-shaped snap ring (4).

3. The on-site maintenance horizontal suspension hoisting maintenance method for an electric furnace transformer according to claim 1, characterized in that: In step b, the specific steps for connecting the hook of the chain block (5) to the column (2) are as follows: Surround the column (2) with the connecting wire rope (6) with wire rope sleeves at both ends, and connect the wire rope sleeves at both ends of the connecting wire rope (6) to the hook of the chain block (5) through the second U-shaped snap ring (7).

4. A horizontal suspension hoisting and maintenance method for on-site maintenance of an electric furnace transformer according to claim 1, characterized in that: In step d, if it is necessary to repair or replace the switch selector, a switch selector hoisting chain block (12) also needs to be hung on the hoisting steel wire rope (3).

5. A horizontal suspension hoisting and maintenance method for on-site maintenance of an electric furnace transformer according to claim 1, characterized in that: In step d, after hoisting the transformer tank cover through the two tank cover hoisting chain blocks (11), a transverse traction chain block (9) connected to the side of the transformer chamber (1) is erected on the transformer tank cover, and the transformer tank cover is pulled to move horizontally through the transverse traction chain block (9).

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