Automatic gunning machine for electric furnace

Abstract

The utility model belongs to automatic spraying machine technical field especially is a kind of electric furnace automatic spraying machine, including mounting seat, the upper portion of mounting seat is connected with the shell by shaft rotation, shaft is fixedly connected with rotary disc, the lateral wall of shell is fixedly connected with first motor, the output of first motor is fixedly connected with bevel gear wheel.The utility model, with mounting seat as foundation, first motor-bevel gear wheel-rotary disc linkage realizes overall orientation flexible adjustment, cooperate second motor-gear set driven rotary arm and cylinder-sliding block transmission, combined with third, fourth motor-driven spraying gun precision angle adjustment, can blind area coverage electric furnace damaged area, repair precision is high;Automation operation completely avoids artificial high-temperature high-risk operation risk, and need not long time to stop furnace, substantially improve production efficiency;Compact inlay structure and linkage transmission design simultaneously, guarantee equipment stable operation under harsh working conditions, prolong own life and reduce electric furnace overhaul cost.

Description

Technical Field

[0001] This utility model relates to the field of automatic spraying machine technology, specifically an automatic spraying machine for electric furnaces. Background Technology

[0002] In metallurgical steelmaking, the electric arc furnace (EAF) is a core smelting equipment. Its inner lining, constructed of refractory materials, must withstand the long-term scouring of high-temperature molten steel, chemical corrosion, and mechanical impacts during charging. With an increase in smelting batches, the lining is prone to localized peeling, cracking, and thinning due to erosion. Failure to repair in a timely manner increases the risk of molten steel leakage, potentially leading to safety accidents, shortening the EAF's lifespan, and increasing the frequency of major overhauls and production costs. Traditional EAF repairs often rely on manual spraying, requiring operators to work closely after the furnace is shut down. This is not only physically demanding but also exposes them to multiple safety hazards, including high temperatures, dust, and slag splashes, making it difficult to guarantee operational safety.

[0003] Manual spraying has significant technical limitations: On the one hand, manual operation is highly subjective, making it difficult to accurately control the amount of spraying material and the spraying angle, resulting in uneven repair layer thickness, weak adhesion, inconsistent repair effects, and difficulty in forming effective protection. Some damaged areas even show a situation of "repairing but not being firm," requiring secondary repair in a short period of time. On the other hand, manual spraying is inefficient, requiring a significant amount of production time to shut down the furnace, which seriously affects the continuous operation efficiency of the steelmaking production line. This is especially true for large electric arc furnaces, where the long manual repair cycle results in more significant capacity losses.

[0004] While existing automated spraying equipment attempts to replace manual labor, it still suffers from structural design flaws: the adjustment dimensions of the spraying actuator in some equipment are limited, resulting in blind spots in the repair process; the transmission structure of some equipment has poor linkage, leading to insufficient positioning accuracy and poor motion stability of the spraying gun, which affects the repair quality; and the layout of key components in some equipment is unreasonable. These problems limit the promotion and application of automated spraying equipment. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an automatic electric furnace spraying machine, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: An automatic spraying machine for electric furnaces includes a mounting base. A housing is rotatably connected to the top of the mounting base via a shaft. A rotating disk is fixedly connected to the shaft. A first motor is fixedly connected to the side wall of the housing. A bevel gear disk is fixedly connected to the output end of the first motor, and the bevel gear disk meshes with the rotating disk. A second motor is fixedly connected to the other side wall of the housing. A small gear disk is fixedly connected to the output end of the second motor. The small gear disk meshes with a large gear disk. A rotating arm is coaxially fixedly connected to the large gear disk. A sliding groove is provided on the inner wall of the rotating arm. A slider is slidably connected in the groove. A cylinder is fixedly connected to one end of the slider. A connecting piece is rotatably connected to the other end of the slider. The connecting piece is rotatably connected to a mounting block. An extension rod is embedded inside the mounting block. A connecting block is fixedly connected to the front end of the extension rod. A third motor is fixedly installed on one side of the connecting block. A U-shaped block is fixedly connected to the output end of the third motor. A fourth motor is embedded in the U-shaped block. A mounting disk is fixedly connected to the output end of the fourth motor. A spraying gun is mounted on the mounting disk.

[0007] Furthermore, the rotating arm is coaxially rotatably connected to the front of the housing.

[0008] Furthermore, the cylinder is embedded in the rotating arm.

[0009] Furthermore, the mounting block is rotatably connected to the top of the rotating arm.

[0010] Furthermore, the U-shaped block is installed in the connecting block and rotatably connected to it.

[0011] Compared with the prior art, this utility model provides an automatic spraying machine for electric furnaces, which has the following advantages: This utility model, based on a mounting base, achieves flexible overall orientation adjustment through the linkage of a first motor, a bevel gear disc, and a rotating disc. Combined with a rotating arm driven by a second motor and gear set, and a cylinder-slider transmission, along with precise angle adjustment of the spray gun driven by third and fourth motors, it can cover damaged areas of the electric furnace without blind spots, achieving high repair accuracy. Automated operation completely avoids the risks of manual high-temperature and high-risk operations, and eliminates the need for prolonged furnace shutdowns, significantly improving production efficiency. Simultaneously, the compact, embedded structure and linkage transmission design ensure stable operation of the equipment under harsh conditions, extending its lifespan and reducing the cost of major furnace overhauls. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear view structure of this utility model; Figure 3 This is a schematic diagram of the internal side view structure of this utility model; Figure 4 This is a schematic diagram of the left-side structure of this utility model.

[0013] In the diagram: 1. Mounting base; 2. Housing; 3. Rotary disc; 4. First motor; 5. Bevel gear disc; 6. Second motor; 7. Small gear disc; 8. Large gear disc; 9. Rotating arm; 10. Slide groove; 11. Cylinder; 12. Slider; 13. Connecting piece; 14. Mounting block; 15. Extension rod; 16. Connecting block; 17. Third motor; 18. U-shaped block; 19. Fourth motor; 20. Mounting plate; 21. Spray gun. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0015] like Figure 1-4 As shown, an embodiment of the present invention provides an automatic electric furnace spraying machine, including a mounting base 1. A housing 2 is rotatably connected to the top of the mounting base 1 via a shaft. A rotating disk 3 is fixedly connected to the shaft. A first motor 4 is fixedly connected to the side wall of the housing 2. A bevel gear disk 5 is fixedly connected to the output end of the first motor 4. The first motor 4 drives the bevel gear disk 5 to mesh with the rotating disk 3, thereby causing the housing 2, which is fixed to the shaft of the rotating disk 3, to rotate around the shaft of the mounting base 1, thus realizing a large-angle adjustment of the overall working position of the equipment. The bevel gear 5 meshes with the rotating disk 3. A second motor 6 is fixedly connected to the other side wall of the housing 2. A small gear 7 is fixedly connected to the output end of the second motor 6. The small gear 7 meshes with and drives a large gear 8. The large gear 8 is coaxially fixedly connected to the rotating arm 9. The power output of the second motor 6 is transmitted to the large gear 8 through gear meshing, which drives the coaxially fixed rotating arm 9 to rotate around the front of the housing 2. The inner wall of the rotating arm 9 is provided with a sliding groove 10, in which a slider 12 is slidably connected. One end of the slider 12 is fixedly connected to a cylinder 11, and the other end of the slider 12 is rotatably connected to a connector 13. The connector 13 is rotatably connected to a mounting block 14. An extension rod 15 is embedded inside the mounting block 14. The front end of the extension rod 15 is fixedly connected to a connecting block 16. A third motor 17 is fixedly installed on one side of the connecting block 16. A U-shaped block 18 is fixedly connected to the output end of the third motor 17. A fourth motor 19 is embedded in the U-shaped block 18. The output end of the fourth motor 19 is fixedly connected to a mounting plate 20. A spray gun 21 is installed on the mounting plate 20. The third motor 17 drives the U-shaped block 18 to rotate in the connecting block 16, and the fourth motor 19 drives the mounting plate 20 to rotate. The two work together to achieve fine adjustment of the pitch and circumferential angle of the spray gun 21.

[0016] The working principle of the automatic spraying machine for electric furnaces is as follows: The mounting base 1 provides fixed support for the entire equipment. The first motor 4 drives the bevel gear disk 5 to mesh with the rotating disk 3, causing the machine casing 2 to rotate around the axis to adjust the overall working position. The second motor 6 drives the rotating arm 9 to rotate through the meshing transmission of the small gear disk 7 and the large gear disk 8. The cylinder 11 pushes the slider 12 to slide along the slide groove 10 of the rotating arm 9, and then drives the mounting block 14 to adjust the angle through the connecting piece 13. The position adjustment of the spraying gun 21 is achieved by the extension and retraction of the extension rod 15. The third motor 17 drives the U-shaped block 18 to rotate, and the fourth motor 19 drives the mounting disk 20 to rotate. The dual adjustment makes the spraying gun 21 accurately aim at the damaged part of the electric furnace lining. Finally, the spraying gun 21 sprays refractory material to complete the automated repair operation.

[0017] like Figure 3 As shown, in some embodiments, the rotating arm 9 is coaxially rotatably connected to the front of the housing 2. On the one hand, "coaxial rotation" ensures that the rotating arm 9 rotates around the fixed axis in front of the housing 2, avoiding deviation or shaking during rotation, and ensuring the stability of the subsequent connecting parts 13, mounting blocks 14, extension rods 15 and spray guns 21 when they move, preventing the spraying position deviation caused by arm deviation. On the other hand, the layout of "connected to the front of the housing 2" allows the rotating arm 9 to extend directly towards the electric furnace. With the transmission structure of the second motor 6 driving its rotation through the small gear plate 7 and the large gear plate 8, the swing angle of the rotating arm 9 can be quickly adjusted, thereby driving the spray gun 21 to cover the front and side areas of the electric furnace lining, reducing the repair blind area, and providing stable arm support for the subsequent sliding of the slider 12 along the slide groove 10 and the extension of the extension rod 15, etc., helping to adjust the spraying position accurately in multiple dimensions.

[0018] like Figure 1As shown, in some embodiments, the cylinder 11 is embedded in the rotating arm 9; the cylinder 11 is directly embedded inside the rotating arm 9, and its output end can directly drive the slider 12 to slide along the slide groove 10 of the rotating arm 9, reducing the loss and delay in the power transmission process, and ensuring that the slider 12 responds more quickly when it drives the mounting block 14, the extension rod 15 and the spray gun 21 to adjust their positions through the connector 13.

[0019] like Figure 2 As shown, in some embodiments, the mounting block 14 is rotatably connected to the top of the rotating arm 9. Firstly, the "rotatable connection" gives the mounting block 14 the ability to adjust its angle around the top axis of the rotating arm 9. When the cylinder 11 pushes the slider 12 to slide along the slide groove 10, the slider 12 drives the mounting block 14 to rotate through the connector 13, which can directly adjust the pitch angle of the extension rod 15 and the spray gun 21 to adapt to the repair needs of damaged areas at different heights of the electric furnace lining. Secondly, the "mounted on the top of the rotating arm 9" position layout allows the mounting block 14 and subsequent components to extend outward along the extension direction of the rotating arm 9, avoiding motion interference with the main structure of the rotating arm 9 and ensuring the smoothness of the sliding of the slider 12 and the swinging of the rotating arm 9. Thirdly, this rotating structure provides the spray gun 21 with dual position compensation of "arm swing + self-angle fine adjustment". Combined with the extension and retraction of the extension rod 15 and the precise adjustment of the third motor 17 and the fourth motor 19, the spray position deviation can be further reduced, ensuring that the refractory material can accurately cover the damaged area and improve the uniformity and firmness of the repair layer.

[0020] like Figure 1 As shown, in some embodiments, the U-shaped block 18 is rotatably connected to the connecting block 16. Firstly, this "rotatable connection" characteristic grants the U-shaped block 18 a degree of rotational freedom around the connecting block 16. When the third motor 17 drives the U-shaped block 18 to rotate, it can directly drive the embedded fourth motor 19, mounting plate 20, and spray gun 21 to synchronously adjust their pitch angles, adapting to the repair needs of vertical or inclined surfaces of the electric furnace lining and filling in the angle deviation after rough adjustment. Secondly, the embedded layout of "installed in the connecting block 16" ensures that the U-shaped block 18 and the connecting block 16 form a tight connection. The integrated structure avoids component deformation caused by external collisions and reduces the corrosion of rotating parts by dust and steel slag in high-temperature environments, ensuring smooth adjustment and structural stability. Thirdly, the rotating structure and the circumferential rotation of the mounting plate 20 driven by the fourth motor 19 form a "pitch + circumferential" dual angle adjustment linkage. With the extension and retraction of the extension rod 15 and the movement of the rotating arm 9, the spray gun 21 can be precisely adapted to the complex-shaped damaged areas of the electric furnace lining, such as curved surfaces and corners, ensuring that the spray angle of the refractory material fits the lining surface and improves the bonding strength and uniformity of the repair layer.

[0021] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic spraying machine for electric furnaces, comprising a mounting base (1), characterized in that: The mounting base (1) is rotatably connected to the housing (2) via a shaft. A rotating disk (3) is fixedly connected to the shaft. A first motor (4) is fixedly connected to the side wall of the housing (2). A bevel gear disk (5) is fixedly connected to the output end of the first motor (4). The bevel gear disk (5) meshes with the rotating disk (3). A second motor (6) is fixedly connected to the other side wall of the housing (2). A small gear disk (7) is fixedly connected to the output end of the second motor (6). The small gear disk (7) meshes with a large gear disk (8). The large gear disk (8) is coaxially fixedly connected to a rotating arm (9). A sliding groove (10) is provided on the inner wall of the rotating arm (9). A slider (12) is engaged and slidably connected in the sliding groove (10). One end of the slider (12) is fixedly connected to a cylinder (11), and the other end of the slider (12) is rotatably connected to a connector (13). The connector (13) is rotatably connected to a mounting block (14). An extension rod (15) is embedded inside the mounting block (14). A connecting block (16) is fixedly connected to the front end of the extension rod (15). A third motor (17) is fixedly installed on one side of the connecting block (16). A U-shaped block (18) is fixedly connected to the output end of the third motor (17). A fourth motor (19) is embedded in the U-shaped block (18). A mounting plate (20) is fixedly connected to the output end of the fourth motor (19). A spray gun (21) is installed on the mounting plate (20).

2. The automatic spraying machine for electric furnaces according to claim 1, characterized in that: The rotating arm (9) is coaxially rotatably connected to the front of the housing (2).

3. The automatic spraying machine for electric furnaces according to claim 1, characterized in that: The cylinder (11) is embedded in the rotating arm (9).

4. The automatic spraying machine for electric furnaces according to claim 1, characterized in that: The mounting block (14) is mounted on the top of the rotating arm (9) in a rotatable connection.

5. The automatic spraying machine for electric furnaces according to claim 1, characterized in that: The U-shaped block (18) is installed in the connecting block (16) and rotatably connected to it.

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