Electroslag furnace gas shield cleaning device

Abstract

The utility model relates to an electric-shock furnace gas protection cover cleaning device, belong to metallurgical industry electric-shock furnace equipment technical field. Technical scheme is: movable semicircle shell A (1) and movable semicircle shell B (2) are wrapped on copper column (9) in the gas protection cover (7), one end of movable semicircle shell A (1) and movable semicircle shell B (2) are connected together through pin shaft (2), and the other end is connected together through pin bolt (6);Movable semicircle shell A (1) and movable semicircle shell B (4) are both the double -deck structure that is formed by semicircle inner shell and semicircle outer shell, and the inner shell diameter is matched with copper column (9) in the gas protection cover (7), and the hole (10) of uniform arrangement is equipped on the outer shell, and the lower part is connected with rubber hose (3) through the interface. The utility model has the beneficial effect that: can sweep the full range of gas protection cover, and the dust of sweeping is sucked away through dust removal pipeline on the gas protection cover.

Description

Technical Field

[0001] This utility model relates to a cleaning device for the gas protection cover of an electroslag furnace, belonging to the technical field of electroslag furnace equipment in the metallurgical industry. Background Technology

[0002] With the continuous development of electroslag furnace equipment technology, gas-protected electroslag furnaces have been widely used. Adding a gas protective hood above the electroslag furnace crystallizer to enclose the consumable electrode being smelted creates a sealed space. Argon gas is then introduced into the hood to replace the air, reducing the oxygen content within the hood and minimizing or preventing oxidation of the consumable electrode at high temperatures. This significantly improves the cleanliness of the electroslag ingot.

[0003] The gas shield has a diameter larger than the crystallizer diameter and a height typically exceeding 5 meters, enclosing most or all of the consumable electrodes within it. The gas shield shell is water-cooled to prevent deformation under high-temperature conditions. The gas pressure inside the shield is maintained at a slight positive pressure to enhance sealing. A dust removal pipe is installed at the top of the gas shield to remove high-temperature waste gas and dust generated during the electroslag smelting process. Due to the low flow velocity of the high-temperature, dust-laden waste gas inside the gas shield and its contact with the cooling shell, some dust adheres to the inner surface of the shell. During each electroslag smelting process, a large amount of dust adheres to the inner surface of the gas shield shell. This dust needs to be cleaned before production to prevent it from absorbing moisture and falling into the crystallizer, affecting the quality of the electroslag ingots. The gas shield's height and narrow interior, due to space constraints, make manual cleaning ineffective. Efficient cleaning of the dust inside the gas shield is crucial for stabilizing the quality of the electroslag ingots.

[0004] A gas protection cover cleaning device for electroslag furnaces is designed and installed on a copper column inside the gas protection cover. By controlling the lifting and lowering of the copper column, the gas protection cover cleaning device moves up and down. High-pressure nitrogen is used to blow away the dust on the inner surface of the gas protection cover shell, which can achieve full-range close-range cleaning, greatly improving the cleaning efficiency and effectively preventing the quality of electroslag ingots from being affected by dust absorption and moisture shedding. Utility Model Content

[0005] The purpose of this invention is to provide a cleaning device for the gas protection cover of an electroslag furnace, which can clean the entire range of the gas protection cover. The dust collected during cleaning is sucked away through the dust removal pipe on the gas protection cover, thus solving the problems existing in the background technology.

[0006] The technical solution of this utility model is: A cleaning device for a gas protective cover of an electroslag furnace includes a movable semi-circular shell A, a pin, a rubber hose, a movable semi-circular shell B, a bolt, and a gas protective cover. Movable semi-circular shells A and B are encased within a copper column inside the gas protective cover. One end of each shell is connected by a pin, and the other end is connected by a bolt. Both shells A and B are double-layered structures consisting of a semi-circular inner shell and a semi-circular outer shell. The diameter of the inner shell matches the diameter of the copper column inside the gas protective cover. The outer shells of shells A and B have evenly distributed holes. The lower parts of shells A and B are connected to the rubber hose via an interface.

[0007] The holes evenly arranged on the outer shells of the movable semi-circular shell A and movable semi-circular shell B are arranged in five alternating rows.

[0008] The three rows of holes in the middle of the outer shells of the movable semicircular shells A and B are perpendicular to the outer shells, while the top row and bottom row of holes are inclined upwards and downwards at 30° respectively.

[0009] Rubber pads are filled between the movable semi-circular shells A and B and the consumable electrode copper column.

[0010] The gas protective cover is equipped with a dust removal port on its top.

[0011] The rubber tubing is connected to the nitrogen pipeline.

[0012] The beneficial effects of this invention are as follows: By controlling the lifting and lowering of the copper column through a drive device, the gas protection cover cleaning device moves up and down. High-pressure nitrogen gas is used to blow away the accumulated dust on the inner surface of the gas protection cover. The cleaned dust is then sucked away through the dust removal pipe on the gas protection cover, achieving highly efficient cleaning of the entire gas protection cover. This prevents dust from absorbing moisture and falling into the crystallizer, thus avoiding its impact on the quality of the electroslag ingots. This invention has a simple structure, is easy to use, facilitates the cleaning and maintenance of the electroslag furnace gas protection cover, and is safe and reliable in use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure and installation of this utility model; In the diagram: 1—Modular semi-circular shell A, 2—Pin, 3—Rubber tubing, 4—Modular semi-circular shell B, 5—Rubber pad, 6—Pin, 7—Gas protection cover, 8—Dust removal port, 9—Copper column, 10—Hole. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] See attached document Figure 1 A gas protection cover cleaning device for an electroslag furnace includes a movable semi-circular shell A1, a pin 2, a rubber hose 3, a movable semi-circular shell B4, a pin 6, and a gas protection cover 7. The movable semi-circular shells A1 and B2 are wrapped around copper pillars 9 inside the gas protection cover 7. One end of the movable semi-circular shells A1 and B2 is connected together by the pin 2, and the other end is connected together by the pin 6. The movable semi-circular shells A1 and B4 are both double-layered structures composed of a semi-circular inner shell and a semi-circular outer shell. The diameter of the inner shell of the movable semi-circular shells A1 and B4 matches the consumable electrode copper pillars 9 inside the gas protection cover 7. The outer shells of the movable semi-circular shells A1 and B4 are provided with evenly arranged holes 10. The lower part of the movable semi-circular shells A1 and B4 is connected to the rubber hose 3 through an interface.

[0016] In this embodiment, refer to the appendix Figure 1 The cleaning device is installed at the lower part of the copper column 9 inside the gas protection hood 7 of the electroslag furnace. It is used for cleaning the ash accumulated inside the gas protection hood. It includes: a movable semi-circular shell A1, a pin 2, a rubber hose 3, a movable semi-circular shell B4, a rubber pad 5, and a pin 6. The movable semi-circular shells A1 and B4 have the same radius, which is 3mm larger than the radius of the copper column 9 inside the gas protection hood 7. The movable semi-circular shells A1 and B4 are connected together by the pin 2 and can wrap around the copper column 9. A 3mm thick rubber pad 5 is filled between the copper column 9 and the movable semi-circular shells A1 and B4 to prevent scratching or damaging the consumable electrode copper column when installing and fixing the movable semi-circular shells A1 and B4. The pin 6 is used to lock and fix the movable semi-circular shells A1 and B4 to prevent them from falling off when the copper column moves up and down. One end of the rubber hose 3 is connected to the nitrogen pipeline, and the other end is connected to the movable semi-circular shell A1 and movable semi-circular shell B4 through a tee connector to provide high-pressure nitrogen.

[0017] In this embodiment, the movable semi-circular shells A1 and B4 are double-layered hollow shells with a 10mm gap and a height of approximately 150mm, welded from 3mm ordinary steel plates. The outer shells of both shells have five rows of holes, spaced 25mm apart, arranged alternately. The holes are 10mm in diameter, with a 20mm spacing between holes in each row. The middle three rows of holes in both shells are perpendicular to the outer shell, while the top and bottom rows are inclined upwards and downwards at 30°, respectively. The lower parts of both shells have interfaces connecting to the rubber tubing 3.

[0018] The cleaning device for the electroslag furnace gas protection hood is installed at the lower part of the copper column 9 inside the electroslag furnace gas protection hood 7. When cleaning the accumulated ash inside the gas protection hood, nitrogen gas at 0.2-0.4 MPa is introduced into the movable semi-circular shells A1 and B4 through the rubber hose 3. The nitrogen gas is sprayed from the outer holes of the semi-circular shells A1 and B4 onto the inner wall of the gas protection hood 7, cleaning the accumulated ash. A drive device controls the raising and lowering of the copper column, moving the cleaning device up and down repeatedly. After several strokes, the dust and gas are sucked away through the dust removal port 8 at the top of the gas protection hood 7. The entire process is convenient, safe, and reliable.

Claims

1. A cleaning device for a gas protective cover of an electroslag furnace, characterized in that: It includes a movable semi-circular shell A (1), a pin (2), a rubber hose (3), a movable semi-circular shell B (4), a bolt (6), and a gas protection cover (7). The movable semi-circular shell A (1) and the movable semi-circular shell B (4) are wrapped around a copper column (9) inside the gas protection cover (7). One end of the movable semi-circular shell A (1) and the movable semi-circular shell B (4) are connected together by the pin (2), and the other end of the movable semi-circular shell A (1) and the movable semi-circular shell B (4) are connected together by the bolt (6). Both the movable semicircular shell A (1) and the movable semicircular shell B (4) are double-layer structures composed of a semicircular inner shell and a semicircular outer shell. The inner shell diameter of the movable semicircular shell A (1) and the movable semicircular shell B (4) matches the copper column (9) inside the gas protective cover (7). The outer shell of the movable semicircular shell A (1) and the movable semicircular shell B (4) is provided with evenly arranged holes (10). The lower part of the movable semicircular shell A (1) and the movable semicircular shell B (4) is connected to the rubber tube (3) through the interface.

2. The cleaning device for the gas protective cover of an electroslag furnace according to claim 1, characterized in that: The holes (10) evenly arranged on the outer shells of the movable semicircular shell A (1) and movable semicircular shell B (4) are arranged in five alternating rows.

3. The cleaning device for the gas protective cover of an electroslag furnace according to claim 2, characterized in that: The holes (10) in the middle three rows on the outer shell of the movable semicircular shell A (1) and movable semicircular shell B (4) are perpendicular to the outer shell, and the holes (10) in the top row and bottom row are tilted upward and downward by 30° respectively.

4. The cleaning device for the gas protective cover of an electroslag furnace according to claim 1, characterized in that: Rubber pads (5) are filled between the movable semi-circular shell A (1) and movable semi-circular shell B (4) and the copper column (9).

5. The cleaning device for the gas protective cover of an electroslag furnace according to claim 1, characterized in that: The gas protective cover (7) is provided with a dust removal port (8) on its top.

6. The cleaning device for the gas protective cover of an electroslag furnace according to claim 1, characterized in that: The rubber tubing (3) is connected to the nitrogen pipeline.

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