Automatic feeding device for electric furnace steelmaking production

Abstract

The application discloses an automatic feeding device for electric furnace steelmaking production and relates to the technical field of electric furnace steelmaking production. The automatic feeding device comprises a supporting frame, first T-shaped grooves are formed in the front and back sides of the inner cavity of the supporting frame, a conveying cylinder is arranged at the left side of the inner cavity of the supporting frame, and an opening is formed in the top of the conveying cylinder. The automatic feeding device can realize the following functions through the cooperation of the supporting frame, a hydraulic cylinder, a collecting frame, an elastic tube and other structures: the position of the device is determined first, the device is erected on the surface of an electric furnace, the discharge cover is aligned with the top of the electric furnace, the discharge cover is moved downward, the elastic tube is stretched by the discharge cover, the bottom of the discharge cover is attached to the feeding port on the top of the electric furnace, the elastic plate is moved, the elastic plate is attached to the surface of the electric furnace, and if it is necessary to limit the position of the discharge cover, the threaded holes in the elastic plate are aligned with the threaded holes in the surface of the electric furnace, and the threaded holes in the elastic plate are connected with the threaded holes in the surface of the electric furnace through bolts, so that the position of the discharge cover is limited.

Description

Technical Field

[0001] This invention relates to the field of electric arc furnace steelmaking technology, specifically to an automatic feeding device for electric arc furnace steelmaking. Background Technology

[0002] Automatic feeding devices used in electric arc furnace steelmaking are key equipment in the steelmaking process. They are mainly used to transport large raw materials such as iron ore and dusty materials such as limestone powder into the electric arc furnace. These devices need to meet requirements such as large-capacity continuous feeding, accurate raw material ratio and environmental cleanliness. Their performance directly affects steelmaking efficiency and product quality.

[0003] However, existing electric arc furnace (EAF) steelmaking charging devices have some problems in use. Existing charging devices usually require manual conveying and discharge of raw materials. The high temperature of the EAF itself and the uncertainty brought about by the working environment will reduce the personal safety of operators. At the same time, existing charging devices are not convenient for positioning and charging EAFs of different heights and diameters. Some raw materials may fall to the ground during the charging process. Moreover, dust will be generated during the charging process, and existing technologies do not facilitate the absorption and treatment of dust. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this invention is to provide an automatic feeding device for electric arc furnace steelmaking.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic feeding device for electric arc furnace steelmaking, comprising a support frame, wherein first T-slots are provided on both the front and rear sides of the inner cavity of the support frame, a conveying cylinder is provided near the left side of the inner cavity of the support frame, an opening is provided at the top of the conveying cylinder, a discharge frame is provided through the left side of the conveying cylinder near the top and is fixedly connected thereto, rotating columns are inserted into both the front and rear sides of the conveying cylinder near the top, and a first T-block is fixedly connected to the end of the rotating column away from the conveying cylinder, the first T-block is movably connected in an adjacent first T-slot, an N-type plate is fixedly connected to the top of the rotating column, the N-type plate is sleeved on the outer edge of the support frame, a limiting plate is fixedly connected to the side of the N-type plate away from the rotating column, the limiting plate is located at the outer edge of the support frame, a cylinder is fixedly connected to the left side of the limiting plate, a connecting column is fixedly connected to the left side of the cylinder near the support frame, and the end of the connecting column away from the cylinder is inserted into the outer edge of the support frame.

[0006] Preferably, a feeding hood is provided at the bottom of the support frame near the left side. A telescopic tube is fixedly connected to the bottom of the feeding hood, and a discharging hood is fixedly connected to the bottom end of the telescopic tube. Four connecting plates are fixedly connected to the outer edge of the feeding hood near the top. Vertical rods are fixedly connected to the top of the connecting plates on both the front and rear sides. U-shaped blocks are hinged to the outer edge of the vertical rods near the top. The top of the U-shaped blocks is fixedly connected to the bottom of the support frame.

[0007] Preferably, four fixing plates are fixedly connected to the outer edge of the discharge hood near the bottom. A round tube is fixedly connected to the top of the fixing plate and the bottom of the connecting plate. A second spring is provided in the inner cavity of two adjacent round tubes. The top end of the second spring is fixedly connected to the bottom of the connecting plate, and the bottom end of the second spring is fixedly connected to the top of the fixing plate.

[0008] Preferably, each of the fixed plates has a second T-shaped groove at its bottom, and a second T-shaped block is movably connected in each of the second T-shaped grooves. An elastic plate is fixedly connected to the bottom of each of the second T-shaped blocks. A threaded hole is opened in the inner cavity of each elastic plate near the bottom, and a bolt is threaded into each of the threaded holes. A third spring is fixedly connected to the side of each of the second T-shaped blocks away from the discharge hood, and the end of the third spring away from the second T-shaped block is fixedly connected to the side wall of the adjacent second T-shaped groove.

[0009] Preferably, a limiting rod is fixedly connected to the top of the support frame near the right side, and a fixing block is fixedly connected to the end of the limiting rod away from the support frame. A first groove is formed at the bottom of the fixing block near the right side, and a vertical plate is hinged in the first groove. A collecting frame is fixedly connected to the bottom of the vertical plate. A through groove is formed at the top of the collecting frame near the left side. A first spring is fixedly connected to the outer edge of the limiting rod, and the end of the first spring away from the limiting rod is fixedly connected to the top of the collecting frame. Two discharge holes are formed at the bottom of the collecting frame near the right side, and a discharge pipe is fixedly connected to each discharge hole. A solenoid valve is installed on each discharge pipe.

[0010] Preferably, a movable plate is fitted at the center of the inner cavity of the collection frame, a through hole is opened on the right side of the collection frame, a first U-shaped rod is fixedly connected to the right side of the movable plate, the end of the first U-shaped rod away from the movable plate passes through the adjacent through hole and extends to the bottom of the collection frame, a second groove is opened near the top of the end of the first U-shaped rod away from the movable plate, a swing block is hinged in the second groove, an L-shaped plate is fixedly connected to the left side of the swing block, the L-shaped plate is located in the inner cavity of the support frame, a fourth spring is sleeved on the outer edge of the first U-shaped rod, the fourth spring is located in the inner cavity of the collection frame, the left end of the fourth spring is fixedly connected to the right side of the movable plate, and the right end of the fourth spring is fixedly connected to the right side of the inner cavity of the collection frame.

[0011] Preferably, hydraulic cylinders are fixedly connected to the bottom of the support frame near the four corners, and bases are fixedly connected to the bottom of each hydraulic cylinder. A second U-shaped rod is fixedly connected to the bottom of the support frame near the left side. The second U-shaped rod is located on the left side of the conveying cylinder. A vacuum cleaner is provided on the left side of the second U-shaped rod. Inclined plates are fixedly connected to both the front and rear sides of the vacuum cleaner. The top of the inclined plate is fixedly connected to the bottom of the support frame, and the left side of the inclined plate is fixedly connected to the right side of the left hydraulic cylinder.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the cooperation of structures such as support frame, hydraulic cylinder, collection frame, and telescopic tube, can first determine the position of the device, set the device on the surface of the electric furnace, align the discharge hood with the top of the electric furnace, move the discharge hood downward, and the discharge hood drives the telescopic tube to stretch, so that the bottom of the discharge hood is attached to the feed port at the top of the electric furnace. Then, move the elastic plate and attach the elastic plate to the surface of the electric furnace. If it is necessary to limit the position of the discharge hood, align the threaded hole on the elastic plate with the threaded hole on the surface of the electric furnace, and thread the bolt through the threaded hole on the elastic plate and connect it to the threaded hole on the surface of the electric furnace. During feeding, two cylinders are activated, driving the conveyor cylinder and discharge frame to move. As the conveyor cylinder moves to the right, it moves the L-shaped plate to the right, which in turn moves the movable plate. The movable plate moves to the right inside the collection frame, compressing the fourth spring. The material inside the collection frame moves along with the movable plate. When the material reaches the discharge hole at the bottom of the collection frame, it passes through the discharge pipe and enters the conveyor cylinder. As the conveyor cylinder approaches the right side of the support frame's inner cavity, and the movable plate has already moved to the right side of the collection frame's inner cavity, the force of the conveyor cylinder moving to the right causes the collection frame to rotate. The collection frame causes the vertical plate to rotate at the first groove inside the fixed block, and the collection frame itself rotates downwards to the left. When the collection frame is positioned with the left side lower than the right, the conveying cylinder moves to the right side of the inner cavity of the support frame. The fourth spring will drive the movable plate, the first U-shaped rod, and the L-shaped plate to reset. The cylinder drives the conveying cylinder to move to the left. When the conveying cylinder moves to the left, it will contact the right side of the L-shaped plate. The L-shaped plate will swing through the swing block, allowing the conveying cylinder to move to the left. When the conveying cylinder contacts the second U-shaped rod while moving to the left, the conveying cylinder itself will rotate. The conveying cylinder will rotate around the center of the rotating column. The conveying cylinder will rotate and tilt to the lower left. The raw material inside the conveying cylinder will enter the electric furnace through the discharge hood. During the feeding and pouring of the raw material, the dust collector is activated to absorb and treat the dust generated during feeding and pouring. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention; Figure 2This is a right-side perspective view of the present invention; Figure 3 This is a front view of the present invention; Figure 4 This is an exploded view of the conveyor cylinder of the present invention; Figure 5 This is a schematic diagram of the feed hood structure of the component of the present invention; Figure 6 This is a schematic diagram of the material discharge hood structure of the component of the present invention; Figure 7 This is an exploded view of the elastic plate component of the present invention; Figure 8 This is a schematic diagram of the component collection frame structure of the present invention; Figure 9 This is a schematic diagram of the limiting rod structure of the component of the present invention; Figure 10 This is a front view of the first U-shaped rod of the present invention; Figure 11 This is a schematic diagram of the right side of the L-shaped plate component of the present invention; Figure 12 This is a schematic diagram of the second U-shaped rod structure of the component of the present invention.

[0014] The following are the labeling elements in the diagram: 1. Support frame; 2. Hydraulic cylinder; 3. Base; 4. Limiting rod; 5. Fixing block; 6. Collection frame; 7. Conveying cylinder; 8. Vacuum cleaner; 9. First spring; 10. Cylinder; 11. Connecting column; 12. Limiting plate; 13. N-shaped plate; 14. Rotating column; 15. First T-shaped block; 16. Discharge frame; 17. Feed hood; 18. Vertical rod; 19. U-shaped block; 20. Connecting plate; 21. Discharge hood; 22. Fixing plate; 23. Elastic plate; 24. Round tube; 25. Second spring; 26. Telescopic tube; 27. Bolt; 28. Second T-shaped block; 29. ​​Third spring; 30. Vertical plate; 31. Movable plate; 32. First U-shaped rod; 33. Fourth spring; 34. L-shaped plate; 35. Swinging block; 36. Second U-shaped rod; 37. Inclined plate; 38. Discharge pipe. Detailed Implementation

[0015] Please see Figure 1-12This invention provides a technical solution: an automatic feeding device for electric arc furnace steelmaking, comprising a support frame 1, with first T-shaped grooves on both the front and rear sides of the inner cavity of the support frame 1, a conveying cylinder 7 located near the left side of the inner cavity of the support frame 1, an opening at the top of the conveying cylinder 7, a discharge frame 16 passing through the left side of the conveying cylinder 7 near the top and fixedly connected thereto, rotating columns 14 inserted into both the front and rear sides of the conveying cylinder 7 near the top, with first T-shaped blocks 15 fixedly connected to the ends of the rotating columns 14 away from the conveying cylinder 7, the first T-shaped blocks 15 being movably connected in adjacent first T-shaped grooves, N-shaped plates 13 fixedly connected to the top of the rotating columns 14, the N-shaped plates 13 being sleeved on the outer edge of the support frame 1, a limiting plate 12 fixedly connected to the side of the N-shaped plates 13 away from the rotating columns 14, the limiting plate 12 being located at the outer edge of the support frame 1, and a cylinder 10 fixedly connected to the left side of the limiting plate 12, the cylinder 10 being located on the left side of the side of the cylinder 10 near the support frame 1. A connecting column 11 is fixedly connected to the support frame 1. The end of the connecting column 11 away from the cylinder 10 is inserted into the outer edge of the support frame 1. A feeding hood 17 is provided at the bottom of the support frame 1 near the left side. A telescopic tube 26 is fixedly connected to the bottom of the feeding hood 17. A discharging hood 21 is fixedly connected to the bottom end of the telescopic tube 26. Four connecting plates 20 are fixedly connected to the outer edge of the feeding hood 17 near the top. Vertical rods 18 are fixedly connected to the top of the connecting plates 20 on both the front and rear sides. U-shaped blocks 19 are hinged to the outer edge of the vertical rods 18 near the top. The top of the U-shaped blocks 19 is fixedly connected to the bottom of the support frame 1. Four fixing plates 22 are fixedly connected to the outer edge of the discharging hood 21 near the bottom. Round tubes 24 are fixedly connected to the top of the fixing plates 22 and the bottom of the connecting plates 20. A second spring 25 is provided in the inner cavity of two adjacent round tubes 24. The top end of the second spring 25 is fixedly connected to the bottom of the connecting plate 20, and the bottom end of the second spring 25 is fixedly connected to the top of the fixing plate 22. Each fixed plate 22 has a second T-shaped groove at its bottom, and a second T-shaped block 28 is movably connected within each second T-shaped groove. An elastic plate 23 is fixedly connected to the bottom of each second T-shaped block 28. A threaded hole is formed near the bottom of each elastic plate 23, and a bolt 27 is threaded into each threaded hole. A third spring 29 is fixedly connected to the side of each second T-shaped block 28 away from the discharge hood 21. The end of the third spring 29 away from the second T-shaped block 28 is fixedly connected to the side wall of an adjacent second T-shaped groove. A limit rod 4 is fixedly connected to the top of the support frame 1 near its right side. The limit rod 4 is located away from the support frame 1. One end of the frame is fixedly connected to a fixing block 5. A first groove is provided at the bottom of the fixing block 5 near the right side. A vertical plate 30 is hinged in the first groove. A collection frame 6 is fixedly connected to the bottom of the vertical plate 30. A through groove is provided at the top of the collection frame 6 near the left side. A first spring 9 is fixedly connected to the outer edge of the limiting rod 4. The end of the first spring 9 away from the limiting rod 4 is fixedly connected to the top of the collection frame 6. Two discharge holes are provided at the bottom of the collection frame 6 near the right side. A discharge pipe 38 is fixedly connected to each discharge hole. A solenoid valve is installed on each discharge pipe 38. A movable valve is fitted at the center of the inner cavity of the collection frame 6. A through hole is provided on the right side of the movable plate 31 and the collection frame 6. A first U-shaped rod 32 is fixedly connected to the right side of the movable plate 31. The end of the first U-shaped rod 32 away from the movable plate 31 passes through the adjacent through hole and extends to the bottom of the collection frame 6. A second groove is provided near the top of the end of the first U-shaped rod 32 away from the movable plate 31. A swing block 35 is hinged in the second groove. An L-shaped plate 34 is fixedly connected to the left side of the swing block 35. The L-shaped plate 34 is located in the inner cavity of the support frame 1. A fourth spring 33 is sleeved on the outer edge of the first U-shaped rod 32. The fourth spring 33 is located in the inner cavity of the collection frame 6. The left end of spring 33 is fixedly connected to the right side of the movable plate 31. The right end of spring 33 is fixedly connected to the right side of the inner cavity of the collection frame 6. Hydraulic cylinders 2 are fixedly connected to the bottom of the support frame 1 near the four corners. The bottom of each hydraulic cylinder 2 is fixedly connected to a base 3. The bottom of the support frame 1 is fixedly connected to the left side of the left side of the support frame 1. The second U-shaped rod 36 is located on the left side of the conveying cylinder 7. A vacuum cleaner 8 is provided on the left side of the second U-shaped rod 36. Inclined plates 37 are fixedly connected to both the front and rear sides of the vacuum cleaner 8. The top of the inclined plate 37 is fixedly connected to the bottom of the support frame 1. The left side of the inclined plate 37 is fixedly connected to the right side of the left hydraulic cylinder 2.

[0016] Working principle: First, determine the position of this device and set it on the surface of the electric furnace. Align the discharge hood 21 with the top of the electric furnace. If the height of this device is insufficient to match the height of the electric furnace, activate the hydraulic cylinder 2. The hydraulic cylinder 2 will drive the support frame 1 to move upward, and the base 3 will contact the ground. Then, move the discharge hood 21 downward. The discharge hood 21 will drive the telescopic tube 26 to stretch. The discharge hood 21 will be stretched by the second spring 25 through the fixed plate 22, so that the bottom of the discharge hood 21 is attached to the feed inlet at the top of the electric furnace. Then, move the elastic plate 23. The elastic plate 23 will drive the second T-block 28 to move. The second T-block 28 will move inside the fixed plate 22 and drive the third spring 29 to compress, so that the elastic plate 23 is attached to the surface of the electric furnace. If... When the position of the discharge hood 21 needs to be limited, align the threaded hole on the elastic plate 23 with the threaded hole on the surface of the electric furnace, and thread the bolt 27 through the threaded hole on the elastic plate 23 and connect it with the threaded hole on the surface of the electric furnace. The vertical rod 18, together with the U-shaped block 19, increases the moving angle of the feeding hood 17, the telescopic tube 26, and the discharge hood 21. During feeding, the two cylinders 10 are activated. The cylinders 10 drive the limiting plate 12 to move, the limiting plate 12 drives the N-shaped plate 13 to move, the N-shaped plate 13 drives the rotating column 14 to move, and the rotating column 14 drives the first T-shaped block 15 to move. The first T-shaped block 15 moves in the first T-groove on the support frame 1. The rotating column 14 drives the conveying cylinder 7 and the discharge frame 16 to move. When the conveying cylinder 7 moves to the right, it will drive the L-shaped plate 34 to move to the right. The L-shaped plate 34 drives the first U-shaped rod 32 to move to the right via the swing block 35. The first U-shaped rod 32 drives the movable plate 31 to move. The movable plate 31 moves to the right inside the collection frame 6, and the movable plate 31 drives the fourth spring 33 to compress. The raw material inside the collection frame 6 will move with the movement of the movable plate 31. When the raw material moves to the discharge hole at the bottom of the collection frame 6, the solenoid valve on the discharge pipe 38 is opened, and the raw material will pass through the discharge pipe 38 and enter the conveying cylinder 7. When the conveying cylinder 7 is about to move to the right side of the inner cavity of the support frame 1, and the movable plate 31 has already moved to the right side of the inner cavity of the collection frame 6, the force of the conveying cylinder 7 moving to the right will drive the collection frame 34 to move to the right. The collecting frame 6 rotates, causing the vertical plate 30 to rotate within the first groove of the fixed block 5. The collecting frame 6 itself rotates downwards and to the left, causing the conveying cylinder 7 to move to the right side of the inner cavity of the support frame 1. Since the fourth spring 33 is no longer restrained, it will cause the movable plate 31, the first U-shaped rod 32, and the L-shaped plate 34 to reset. The cylinder 10 then retracts, causing the conveying cylinder 7 to move to the left. As the conveying cylinder 7 moves to the left, it will contact the right side of the L-shaped plate 34. The L-shaped plate 34 will swing via the swing block 35, allowing the conveying cylinder 7 to move to the left and approach the second U-shaped rod 36. When the conveying cylinder 7 contacts the second U-shaped rod 36 while moving to the left, the conveying cylinder 7 itself will rotate.The conveyor cylinder 7 will rotate around the center of the rotating column 14, tilting downwards and to the left. The raw material inside the conveyor cylinder 7 will be discharged into the feed hood 17 through the discharge frame 16. The raw material then enters the electric furnace through the telescopic pipe 26 and the discharge hood 21. During the feeding and unloading process, the dust collector 8 is activated to absorb and treat the dust generated during feeding and unloading.

Claims

1. An automatic feeding device for electric arc furnace steelmaking, comprising a support frame (1), characterized in that: The support frame (1) has first T-shaped grooves on both the front and rear sides of its inner cavity. A conveying cylinder (7) is located near the left side of the inner cavity of the support frame (1). An opening is located at the top of the conveying cylinder (7). A discharge frame (16) is passed through the left side of the conveying cylinder (7) near the top and is fixedly connected to it. Rotating columns (14) are inserted into both the front and rear sides of the conveying cylinder (7) near the top. A first T-shaped block (15) is fixedly connected to the end of each rotating column (14) away from the conveying cylinder (7). The first T-shaped block (15) is movably connected within an adjacent first T-shaped groove. N-shaped plates (13) are fixedly connected to the top of each column (14). The N-shaped plates (13) are sleeved on the outer edge of the support frame (1). Limiting plates (12) are fixedly connected to the side of the N-shaped plates (13) away from the rotating column (14). The limiting plates (12) are located at the outer edge of the support frame (1). Cylinders (10) are fixedly connected to the left side of each limiting plate (12). A connecting column (11) is fixedly connected to the left side of the cylinder (10) near the support frame (1). The end of the connecting column (11) away from the cylinder (10) is inserted into the outer edge of the support frame (1).

2. The automatic feeding device for electric arc furnace steelmaking according to claim 1, characterized in that: The support frame (1) has a feeding hood (17) near the left side of the bottom. A telescopic tube (26) is fixedly connected to the bottom of the feeding hood (17). A discharge hood (21) is fixedly connected to the bottom end of the telescopic tube (26). Four connecting plates (20) are fixedly connected to the outer edge of the feeding hood (17) near the top. Vertical rods (18) are fixedly connected to the top of the connecting plates (20) on both the front and rear sides. U-shaped blocks (19) are hinged to the outer edge of the vertical rods (18) near the top. The top of the U-shaped blocks (19) is fixedly connected to the bottom of the support frame (1).

3. The automatic feeding device for electric arc furnace steelmaking according to claim 2, characterized in that: Four fixing plates (22) are fixedly connected to the outer edge of the discharge hood (21) near the bottom. The top of the fixing plate (22) and the bottom of the connecting plate (20) are both fixedly connected to round tubes (24). The inner cavities of two adjacent round tubes (24) are provided with a second spring (25). The top end of the second spring (25) is fixedly connected to the bottom of the connecting plate (20), and the bottom end of the second spring (25) is fixedly connected to the top of the fixing plate (22).

4. An automatic feeding device for electric arc furnace steelmaking according to claim 3, characterized in that: The bottom of each fixed plate (22) is provided with a second T-shaped groove, and a second T-shaped block (28) is movably connected in each of the second T-shaped grooves. An elastic plate (23) is fixedly connected to the bottom of each of the second T-shaped blocks (28). A threaded hole is provided in the inner cavity of each elastic plate (23) near the bottom. A bolt (27) is threadedly connected in each of the threaded holes. A third spring (29) is fixedly connected to the side of each second T-shaped block (28) away from the discharge hood (21). The end of the third spring (29) away from the second T-shaped block (28) is fixedly connected to the side wall of the adjacent second T-shaped groove.

5. An automatic feeding device for electric arc furnace steelmaking according to claim 4, characterized in that: The support frame (1) is fixedly connected to a limiting rod (4) near the right side of the top. The end of the limiting rod (4) away from the support frame (1) is fixedly connected to a fixing block (5). The bottom of the fixing block (5) is provided with a first groove near the right side. A vertical plate (30) is hinged in the first groove. A collection frame (6) is fixedly connected to the bottom of the vertical plate (30). A through groove is provided at the top of the collection frame (6) near the left side. A first spring (9) is fixedly connected to the outer edge of the limiting rod (4). The end of the first spring (9) away from the limiting rod (4) is fixedly connected to the top of the collection frame (6). Two discharge holes are provided at the bottom of the collection frame (6) near the right side. A discharge pipe (38) is fixedly connected to each discharge hole. A solenoid valve is installed on each discharge pipe (38).

6. An automatic feeding device for electric arc furnace steelmaking according to claim 5, characterized in that: A movable plate (31) is fitted at the center of the inner cavity of the collection frame (6). A through hole is opened on the right side of the collection frame (6). A first U-shaped rod (32) is fixedly connected to the right side of the movable plate (31). The end of the first U-shaped rod (32) away from the movable plate (31) passes through the adjacent through hole and extends to the bottom of the collection frame (6). A second groove is opened near the top of the end of the first U-shaped rod (32) away from the movable plate (31). A swing block (35) is hinged in the second groove. An L-shaped plate (34) is fixedly connected to the left side of the swing block (35). The L-shaped plate (34) is located in the inner cavity of the support frame (1). A fourth spring (33) is sleeved on the outer edge of the first U-shaped rod (32). The fourth spring (33) is located in the inner cavity of the collection frame (6). The left end of the fourth spring (33) is fixedly connected to the right side of the movable plate (31). The right end of the fourth spring (33) is fixedly connected to the right side of the inner cavity of the collection frame (6).

7. An automatic feeding device for electric arc furnace steelmaking according to claim 6, characterized in that: Hydraulic cylinders (2) are fixedly connected to the bottom of the support frame (1) near the four corners. The bottom of each hydraulic cylinder (2) is fixedly connected to a base (3). A second U-shaped rod (36) is fixedly connected to the bottom of the support frame (1) near the left side. The second U-shaped rod (36) is located on the left side of the conveying cylinder (7). A vacuum cleaner (8) is provided on the left side of the second U-shaped rod (36). Inclined plates (37) are fixedly connected to both the front and rear sides of the vacuum cleaner (8). The top of the inclined plate (37) is fixedly connected to the bottom of the support frame (1). The left side of the inclined plate (37) is fixedly connected to the right side of the left hydraulic cylinder (2).

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