Electric arc furnace tapping hole protection device

Abstract

The present invention relates to an arc furnace steel tapping hole protection device, comprising a base; a servo motor is fixedly connected to the base; the output end of the servo motor is fixedly connected to the rotating rod; the base is fixedly connected to a protection base; the protection base is rotatably connected to a protection barrel; the protection barrel is rotatably connected to the protection base; the protection barrel is fixedly connected to a slider; the base is fixedly connected to a slide bar support frame; an arc-shaped slide bar is fixedly connected between each group of the slide bar support frames; a lifting mechanism is connected inside the protection barrel; the lifting mechanism is connected to a scraper; the slider and the rotating rod are fixedly connected to a connecting rod; a sliding groove is provided on the top of the base to cooperate with the sliding of the connecting rod; the inclination angle of the steel tapping hole and the protection barrel are consistent, and the protection barrel is connected to the steel tapping hole of the electric arc furnace and sealed; the scraper is used to scrape off the molten steel and impurities in the steel tapping hole through the lifting mechanism, thereby reducing the corrosion of the molten steel and impurities to the inside of the steel tapping hole.

Description

Technical Field

[0001] The invention relates to the technical field of electric arc furnaces, in particular to a tapping hole protection device for an electric arc furnace. Background Art

[0002] Electric arc furnaces melt metals using the high temperatures generated by an arc generated by electrodes. The arc, formed by gas discharge, can reach temperatures exceeding 3,000°C. Compared to other steel furnace ironmaking processes, electric arc furnaces offer greater flexibility and can remove impurities such as sulfur and phosphorus from the raw materials, improving the purity of the steel. Furthermore, electric arc furnaces are easy to control in temperature and compact, making them ideal for melting high-quality alloy steels.

[0003] Today's steelmaking technology is largely automated, requiring only a small number of operators on site. A carrier truck pours the scrap steel into the electric arc furnace. After the furnace melts the scrap steel into molten steel through the heat of the electric arc, the furnace tilts and the molten steel flows out through the taphole. The molten steel then flows into a trolley at the bottom of the taphole, which transports the molten steel to the next process.

[0004] However, the molten steel contains impurities. When the molten steel flows out of the taphole, residual molten steel will remain on the inner wall of the taphole. The impurities in the molten steel will corrode the inner wall of the taphole. Long-term corrosion of the taphole can easily damage the taphole, and the taphole is more complicated to replace. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the corrosion problem of the tapping hole caused by the residual molten steel and impurities in the prior art.

[0006] In order to solve the above technical problems, the present invention provides an electric arc furnace tapping hole protection device, comprising a base; a cavity is provided in the base; a servo motor is fixedly connected to the base; the output end of the servo motor passes through the side wall of the base and is fixedly connected to the rotating rod; the two ends of the rotating rod are respectively rotatably connected to one side wall of the base; a protection base is fixedly connected to the base; the protection base is rotatably connected to a protection barrel; the protection barrel is located in the middle of the protection base; the lower end of the protection barrel is rotatably connected to the protection base; the upper end of the protection barrel is fixedly connected to two sliders; two The sliders are respectively located on one side of the protective barrel; two groups of sliding rod support frames are fixedly connected to the base; the number of each group of sliding rod support frames is two; each group of sliding rod support frames corresponds to the slider; an arc sliding rod is fixedly connected between each group of sliding rod support frames; the arc sliding rod is slidably connected to the slider; a lifting mechanism is connected inside the protective barrel; the upper end of the lifting mechanism is connected to a scraper; the lifting mechanism is used to send the scraper from the bottom of the steel tapping hole into the inside of the steel tapping hole; a connecting rod is fixedly connected between the slider and the rotating rod; a sliding groove is provided on the top of the base to cooperate with the sliding of the connecting rod;

[0007] In one embodiment of the present invention, the two sliders are arranged in the same direction as the rotating rod;

[0008] In one embodiment of the present invention, the two connecting rods and the sliding grooves are respectively located on both sides of the protection base;

[0009] In one embodiment of the present invention, the lifting mechanism includes a cylinder mounting plate; the cylinder mounting plate is fixedly connected to the lower end of the protection barrel; the cylinder mounting plate is fixedly connected to the cylinder; the output end of the cylinder passes through the cylinder mounting plate and is rotatably connected to the scraper;

[0010] In one embodiment of the present invention, the cylinder is located between the cylinder mounting plate and the bottom of the protective barrel;

[0011] In one embodiment of the present invention, the output end of the cylinder is rotatably connected to a screw rod; the screw rod is threadedly connected to a fixing plate; the fixing plate is located between the scraper and the cylinder mounting plate; the upper end of the screw rod is fixedly connected to the scraper;

[0012] In one embodiment of the present invention, a support plate is fixedly connected to each side of the protection barrel; a spring is connected between the support plate and the protection barrel; one end of the spring is fixedly connected to the support plate, and the other end of the spring is fixedly connected to the protection barrel;

[0013] In one embodiment of the present invention, the support plate is located between two sets of slide bar support frames; the support plate is tilted;

[0014] In one embodiment of the present invention, one end of the spring is fixedly connected to the support plate, and the other end of the spring is fixedly connected to the protection barrel;

[0015] In one embodiment of the present invention, a plurality of rotating wheels 15 are rotatably connected to the bottom of the base 1 .

[0016] The above technical solution of the present invention has the following advantages over the prior art:

[0017] The present invention starts a servo motor, which controls the tilt angle of the protection barrel through a rotating rod, a connecting rod, a slider and an arc-shaped slide rod to match the tilt angle of the tapping hole when the electric arc furnace is tapping steel. When the tilt angles of the electric arc furnace tapping hole and the protection barrel are consistent, the upper end of the protection barrel is connected to the tapping hole of the electric arc furnace and sealed. A scraper is sent into the upper end of the tapping hole by a lifting mechanism. When the lifting mechanism lowers the scraper, the scraper scrapes off molten steel and impurities on the inner wall of the tapping hole, thereby reducing the corrosion of the inside of the tapping hole by the molten steel and impurities, protecting the internal structure of the tapping hole, and extending the service life of the tapping hole.

[0018] The present invention starts the cylinder; the cylinder drives the scraper through the screw rod and the fixed plate, and the scraper can also rotate during the lifting process; there is more hot air in the steel tapping hole; when the steel tapping hole is opened, the hot air flows outward, and the scraper will encounter greater resistance when directly entering the steel tapping hole; the scraper rotates while entering the steel tapping hole, which can reduce the resistance encountered by the scraper entering the steel tapping hole; during operation, the electric arc furnace will tilt when the steel tapping hole is tapping, so the steel tapping hole will also tilt; the inclination angle of the protective barrel is adjusted by the servo motor; the inclination angle of the protective barrel is kept consistent with the inclination angle of the steel tapping hole. At this time, the connecting rod is affected by the gravity of the protective barrel, and it is difficult to maintain the angle of the protective barrel. The two sides of the protective barrel are supported by the elastic force of the support frame and the spring; the force applied to the connecting rod is reduced, so that the protective barrel can always maintain the inclination angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of a partial structure of an embodiment of the present invention Figure 1 ;

[0022] Figure 3 A schematic diagram of a partial structure of an embodiment of the present invention Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the main body and electric arc furnace structure of an embodiment of the present invention.

[0024] Description of the accompanying drawings:

[0025] 1. Base; 2. Servo motor; 3. Rotating rod; 4. Protective base; 5. Protective barrel; 6. Slider; 7. Slider support frame; 8. Arc-shaped slide; 9. Lifting mechanism; 91. Cylinder mounting plate; 92. Cylinder; 93. Screw; 94. Fixed plate; 10. Scraper; 11. Connecting rod; 12. Slide; 13. Support plate; 14. Spring; 15. Rotating wheel. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1-Figure 4 As shown, a protection device for an electric arc furnace tapping hole includes a base 1;

[0028] The base 1 is provided with a cavity; a servo motor 2 is fixedly connected to the base 1; the output end of the servo motor 2 passes through the side wall of the base 1 and is fixedly connected to the rotating rod 3; the two ends of the rotating rod 3 are respectively rotatably connected to one side wall of the base 1; a protection base 4 is fixedly connected to the base 1; the protection base 4 is rotatably connected to the protection barrel 5; the lower end of the protection barrel 5 is rotatably connected to the protection base 4; the protection barrel 5 is located in the middle of the protection base 4; the upper end of the protection barrel 5 is fixedly connected to two sliders 6; the two sliders 6 are respectively located on one side of the protection barrel 5; the setting direction of the two sliders 6 is the same as the direction of the rotating rod 3; the base 1 is fixed Two groups of sliding rod support frames 7 are connected; the number of the sliding rod support frames 7 in each group is two; each group of the sliding rod support frames 7 corresponds to the slider 6; an arc-shaped sliding rod 8 is fixedly connected between each group of the sliding rod support frames 7; the arc-shaped sliding rod 8 is slidably connected to the slider 6; a lifting mechanism 9 is connected to the inside of the protective barrel 5; a scraper 10 is connected to the upper end of the lifting mechanism 9; the lifting mechanism 9 is used to send the scraper 10 from the bottom of the steel tapping hole into the inside of the steel tapping hole; a connecting rod 11 is fixedly connected between the slider 6 and the rotating rod 3; a sliding groove 12 is provided on the top of the base 1 to cooperate with the sliding of the connecting rod 11; the two connecting rods 11 and the sliding groove 12 are respectively located on both sides of the protective base 4;

[0029] During operation, by starting the servo motor 2, the servo motor 2 drives the slider 6 to slide on the arc slide bar 8 through the rotating rod 3 and the connecting rod 11; the slider 6 drives the upper end of the protection barrel 5 to move, because the lower end of the protection barrel 5 is rotatably connected to the protection base 4; the protection barrel 5 will be tilted, and the position of the slider 6 is controlled by controlling the rotation angle of the servo motor 2, thereby controlling the tilt angle of the protection barrel 5; to cooperate with the arc furnace when tapping steel, in order to facilitate the outflow of molten steel, the tilt angle of the arc furnace; when the arc furnace tapping hole is consistent with the tilt angle of the protection barrel 5, the upper end of the protection barrel 5 is connected to the tapping hole of the arc furnace and sealed; the scraper 10 is sent into the upper end of the tapping hole by the lifting mechanism 9; when the lifting mechanism 9 lowers the scraper 10, the scraper 10 scrapes off the molten steel and impurities on the inner wall of the tapping hole; reducing the corrosion of the molten steel and impurities to the inside of the tapping hole, playing a role in protecting the internal structure of the tapping hole, and extending the service life of the tapping hole;

[0030] In one embodiment of the present invention, the lifting mechanism 9 includes a cylinder mounting plate 91; the cylinder mounting plate 91 is fixedly connected to the lower end of the protective barrel 5; the cylinder mounting plate 91 is fixedly connected to a cylinder 92; the cylinder is located between the cylinder mounting plate 91 and the bottom of the protective barrel 5; the output end of the cylinder 92 passes through the cylinder mounting plate 91 and is rotatably connected to the scraper 10;

[0031] During operation, the cylinder 92 is activated; the cylinder 92 sends the scraper 10 into the upper end of the tapping hole through the extension rod 93; when the cylinder 92 drives the scraper 10 to move downward, the scraper 10 scrapes off the molten steel and impurities on the inner wall of the tapping hole; this can reduce the corrosion of the inside of the tapping hole by the molten steel and impurities, play a role in protecting the internal structure of the tapping hole, and extend the service life of the tapping hole;

[0032] The output end of the cylinder 92 is rotatably connected to a screw rod 93; the screw rod 93 is threadedly connected to a fixing plate 94; the fixing plate 94 is located between the scraper 10 and the cylinder mounting plate 91; the upper end of the screw rod 93 is fixedly connected to the scraper 10;

[0033] During operation, the cylinder 92 is activated; the cylinder 92 drives the scraper 10 through the screw rod 93 and the fixing plate 94, so that the cylinder 92 drives the scraper 10 to rise and fall, and the scraper 1 can also rotate; there is a lot of hot air in the tapping hole; when the tapping hole is opened, the hot air flows outward, and the scraper 10 directly enters the tapping hole and encounters a large resistance; the scraper 10 enters the tapping hole while rotating, which can reduce the resistance encountered by the scraper 10 entering the tapping hole;

[0034] A support plate 13 is fixedly connected to each side of the protection barrel 5; the support plate 13 is located between the two sets of slide support frames 7; the support plate 13 is arranged at an angle; a spring 14 is connected between the support plate 13 and the protection barrel 5; one end of the spring 14 is fixedly connected to the support 12, and the other end of the spring 14 is fixedly connected to the protection barrel 5;

[0035] During operation, the electric arc furnace will tilt when the steel tapping hole is tapping, so the steel tapping hole will also tilt; the servo motor 2 is used to adjust the tilt angle of the protective barrel 5; so that the tilt angle of the protective barrel 5 is consistent with the tilt angle of the steel tapping hole. At this time, the connecting rod 11 is affected by the gravity of the protective barrel 5, and it is difficult to maintain the angle of the protective barrel 5. The support frame 13 and the elastic force of the spring 14 support both sides of the protective barrel 5; reduce the force on the connecting rod 11, so that the protective barrel 5 can always maintain the tilt angle;

[0036] The bottom of the base 1 is rotatably connected to a plurality of rotating wheels 15;

[0037] The rotating wheels 15 make the base 1 more convenient to move.

[0038] Working principle:

[0039] Before use, after the molten steel flows out of the tapping hole, the protective device is moved to the bottom of the tapping hole, and the servo motor 2 is started. The servo motor 2 drives the slider 6 to slide on the arc slide bar 8 through the rotating rod 3 and the connecting rod 11; the slider 6 drives the upper end of the protective barrel 5 to move, because the lower end of the protective barrel 5 is rotatably connected to the protective base 4; the protective barrel 5 will be tilted, and the position of the slider 6 is controlled by controlling the rotation angle of the servo motor 2, thereby controlling the tilt angle of the protective barrel 5; when the tapping hole of the electric arc furnace is consistent with the tilt angle of the protective barrel 5, the upper end of the protective barrel 5 is connected to the tapping hole of the electric arc furnace and sealed; in use, by starting the cylinder 92; the cylinder 92 drives the scraper 10 through the screw rod 93 and the fixed plate 94, and the scraper 1 can also rotate during the lifting process; there is more hot air in the tapping hole; when the tapping hole is opened, the hot air flows outward, and the scraper The plate 10 will encounter greater resistance when entering the steel-making hole directly; the scraper 10 enters the steel-making hole while rotating, which can reduce the resistance encountered by the scraper 10 entering the steel-making hole; the scraper 10 scrapes off the molten steel and impurities on the inner wall of the steel-making hole; it can reduce the corrosion of the inside of the steel-making hole by molten steel and impurities, play a role in protecting the internal structure of the steel-making hole, and extend the service life of the steel-making hole; the inclination angle of the protection barrel 5 is consistent with the inclination angle of the steel-making hole. At this time, the connecting rod 11 is affected by the gravity of the protection barrel 5, and it is difficult to maintain the angle of the protection barrel 5. The two sides of the protection barrel 5 are supported by the elastic force of the support frame 13 and the spring 14; the force received by the connecting rod 11 is reduced, so that the protection barrel 5 can always maintain the inclination angle; after use, the steel-making hole is separated from the protection barrel 5, and the protective device is removed by rotating the wheel 5, so that the trolley carrying molten steel can stay at the bottom of the steel-making hole and wait for the next steel-making.

[0040] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An arc furnace tapping hole protection device, characterized by: The invention comprises a base (1); a cavity is provided in the base (1); a servo motor (2) is fixedly connected to the base (1); an output end of the servo motor (2) passes through the side wall of the base (1) and is fixedly connected to a rotating rod (3); two ends of the rotating rod (3) are respectively rotatably connected to one side wall of the base (1); a protective base (4) is fixedly connected to the base (1); the protective base (4) is rotatably connected to a protective barrel (5); the protective barrel (5) is located in the middle of the protective base (4); the lower end of the protective barrel (5) is rotatably connected to the protective base (4); the upper end of the protective barrel (5) is fixedly connected to two sliders (6); the two sliders (6) are respectively located on one side of the protective barrel (5); the Two groups of slide rod support frames (7) are fixedly connected to the base (1); the number of each group of slide rod support frames (7) is two; each group of slide rod support frames (7) corresponds to the slider (6); an arc-shaped slide rod (8) is fixedly connected between each group of slide rod support frames (7); the arc-shaped slide rod (8) is slidably connected to the slider (6); a lifting mechanism (9) is connected inside the protection barrel (5); a scraper (10) is connected to the upper end of the lifting mechanism (9); the lifting mechanism (9) is used to send the scraper (10) from the bottom of the steel tapping hole into the inside of the steel tapping hole; a connecting rod (11) is fixedly connected between the slider (6) and the rotating rod (3); a sliding groove (12) for sliding with the connecting rod (11) is provided on the top of the base (1); The lifting mechanism (9) includes a cylinder mounting plate (91); the lower end of the protection barrel (5) is fixedly connected to the cylinder mounting plate (91); the cylinder mounting plate (91) is fixedly connected to the cylinder (92); the output end of the cylinder (92) passes through the cylinder mounting plate (91) and is rotatably connected to the scraper (10); The cylinder (92) is located between the cylinder mounting plate (91) and the bottom of the protection barrel (5); The output end of the cylinder (92) is rotatably connected to a screw rod (93); the screw rod (93) is threadedly connected to a fixing plate (94); the fixing plate (94) is located between the scraper (10) and the cylinder mounting plate (91); the upper end of the screw rod (93) is fixedly connected to the scraper (10).

2. The electric arc furnace tapping hole protection device according to claim 1, characterized in that: The two sliders (6) are arranged in the same direction as the rotating rod (3).

3. The electric arc furnace tapping hole protection device according to claim 2, characterized in that: The two connecting rods (11) and the sliding groove (12) are respectively located on both sides of the protective base (4).

4. The electric arc furnace tapping hole protection device according to claim 1, characterized in that: A support plate (13) is fixedly connected to each side of the protection barrel (5); a spring (14) is connected between the support plate (13) and the protection barrel (5); one end of the spring (14) is fixedly connected to the support plate (13), and the other end of the spring (14) is fixedly connected to the protection barrel (5).

5. The electric arc furnace tapping hole protection device according to claim 4, characterized in that: The support plate (13) is located between the two sets of slide rod support frames (7); the support plate (13) is arranged at an angle.

6. The electric arc furnace tapping hole protection device according to claim 5, characterized in that: One end of the spring (14) is fixedly connected to the support plate (13), and the other end of the spring (14) is fixedly connected to the protection barrel (5).

7. The electric arc furnace tapping hole protection device according to claim 6, characterized in that: The bottom of the base (1) is rotatably connected to a plurality of rotating wheels (15).

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