A casting grab

Abstract

This invention belongs to the field of casting technology and relates to a slag removal machine for casting. The invention comprises a flange ring; an electrically driven turntable is rotatably mounted on the flange ring; an upper half-ring frame is fixedly connected to the electrically driven turntable; a lower half-ring frame is movably connected to the electrically driven turntable in a vertical direction; arc-shaped shovels are slidably mounted on both the upper and lower half-ring frames; a rotating plate is rotatably mounted on the upper half-ring frame; the rotating plate blocks the lower opening of the shovels on the upper half-ring frame. By extending the shovels below the liquid surface with their ends piercing into the liquid, the amount of slag pressed below the liquid surface is reduced, improving slag removal efficiency. Through the alternating use and position interchange of the two shovels, slag removal and discharge are performed simultaneously, and a single shovel is prevented from prolonged contact with high-temperature molten metal, extending the service life of the shovels.

Description

Technical Field

[0001] This invention belongs to the field of casting technology and relates to a slag removal machine for casting. Background Technology

[0002] During the casting process, a large amount of slag is generated during metal smelting. This slag floats on the surface of the molten metal, and if not removed in time, it will reduce the purity of the molten metal and affect the quality of the castings. Therefore, slag removal is a crucial step in casting production. This problem not only exists in the production of conventional cast aluminum and cast iron, but also in the non-ferrous metal smelting field, such as the smelting of recycled crude lead, refined lead, alloy lead, and electrolytic lead. Furthermore, slag often contains impurities and some valuable metals; timely and effective slag removal not only helps improve metal purity but also increases resource recycling rates.

[0003] Patent CN117505832A discloses a slag removal device for aluminum casting, comprising a slag removal device and a cleaning device. The device controls the height of the shovel plate via a lifting mechanism, and a motor drives the shovel plate to rotate and scrape away residue from the mold surface. After scraping, the lifting shaft resets, causing the T-shaped rod to move upwards, allowing the scraper to enter the shovel plate's movement trajectory. As the shovel plate rotates, it squeezes the scraper, thus scraping away the residue collected on the shovel plate surface. This device achieves automatic cleaning of the shovel plate surface, avoiding residue residue affecting subsequent slag removal. However, this device still has the following shortcomings: the shovel plate directly presses down when entering the liquid surface, easily pushing some of the floating slag below the surface, making it difficult to collect this slag in a timely and effective manner, reducing slag removal efficiency. Furthermore, during continuous operation, the shovel plate is in prolonged contact with high-temperature molten metal, resulting in a large heat load and making it prone to thermal fatigue deformation or damage, shortening its service life.

[0004] To address the above problems, this invention proposes a slag removal machine for casting. Summary of the Invention

[0005] To address the problems existing in the background art, the present invention proposes a slag removal machine for casting.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a slag removal machine for casting, comprising a flange ring; an electric drive turntable is rotatably mounted on the flange ring, an upper half-ring frame is fixedly connected to the electric drive turntable, a lower half-ring frame is movably connected to the electric drive turntable in a vertical direction, arc-shaped shovels are slidably arranged on both the upper and lower half-ring frames, and a rotating plate is rotatably arranged on the upper half-ring frame; the rotating plate blocks the lower opening of the shovel on the upper half-ring frame.

[0007] The shovel slides along the lower half of the ring frame, with one end penetrating below the liquid surface, ready for retrieval; the electrically driven turntable rotates, and the shovel on the lower half of the ring frame scoops up the scum, while the scum between the shovel and the rotating plate on the upper half of the ring frame is thrown out; the lower half of the ring frame moves up closer to the upper half of the ring frame, so that the two shovels align, and then the two shovels and the rotating plate rotate simultaneously to exchange the positions of the two shovels.

[0008] The shovel slides along the lower half of the ring frame, causing one end to pierce below the liquid surface, reducing the amount of scum pressed below the surface and improving slag removal efficiency. By alternating the use and repositioning of the two shovels, slag removal and discharge are synchronized, avoiding prolonged contact between a single shovel and the high-temperature molten metal, thus extending its service life.

[0009] Furthermore, a cleaning block is elastically slidably disposed on the electric drive turntable, and the cleaning block is slidably engaged with the upper half ring frame; when the electric drive turntable rotates, the cleaning block slides outward along the upper half ring frame under the action of centrifugal force to clean the rotating plate and the shovel plate on the upper half ring frame.

[0010] Furthermore, it also includes a collection ring, which is fitted around the outside of the furnace to receive slag thrown off the upper ring frame.

[0011] Furthermore, both the upper and lower ring frames are equipped with drive wheels for driving the shovel plate.

[0012] Furthermore, the outer surface of the shovel plate that contacts the drive wheel is provided with friction texture to increase friction.

[0013] The friction texture increases the friction between the shovel and the drive wheel, ensuring that the drive wheel can stably and reliably drive the shovel and prevent slippage.

[0014] Furthermore, the electric drive turntable has a tension spring groove, in which a tension spring is installed. One end of the tension spring is fixedly connected to the cleaning block, and the other end is fixedly connected to the electric drive turntable. When the electric drive turntable stops rotating, the tension spring causes the cleaning block to return to its original position, preparing it for the next centrifugal cleaning cycle.

[0015] Furthermore, a cylinder is fixedly installed on the electric drive turntable, and the lower half-ring frame is fixedly connected to the telescopic end of the cylinder. The extension and retraction of the cylinder controls the raising and lowering of the lower half-ring frame relative to the upper half-ring frame, thereby realizing the docking and separation of the two shovels in the vertical direction.

[0016] Furthermore, the lower half-ring frame includes a first crossbar and an arc-shaped plate. Two arc-shaped plates are provided, and the two arc-shaped plates are respectively fixedly connected to the two ends of the first crossbar. A first arc-shaped groove is provided on the arc-shaped plate for sliding engagement with the end of the shovel plate.

[0017] The first arc-shaped groove provides a stable sliding guide for the shovel plate, ensuring that the shovel plate moves along a predetermined trajectory under the action of the drive wheel.

[0018] Furthermore, the upper half-ring frame includes a second crossbar, an arc-shaped rod, and an arc-shaped tube; one end of the second crossbar is fixedly connected to the middle of the arc-shaped rod, and the other end is fixedly connected to one end of the arc-shaped tube; a second arc-shaped groove that slides with the end of the shovel plate is provided on the end face of both the arc-shaped rod and the arc-shaped tube.

[0019] The second arc-shaped groove provides a stable sliding guide for the shovel plate, while the arc-shaped tube design facilitates the scum to be thrown out into the collection ring under the action of centrifugal force.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By extending the shovel blade below the liquid surface with its end piercing inward, the amount of scum pressed below the liquid surface is reduced, thus improving the retrieval efficiency.

[0022] 2. By using two shovels alternately and swapping their positions, slag removal and discharge can be carried out simultaneously, and a single shovel is prevented from being in contact with high-temperature molten metal for a long time, thus extending the service life of the shovel.

[0023] 3. By setting up a centrifugal force-driven cleaning block, the shovel plate is automatically scraped and cleaned when the electric drive turntable rotates, without the need for additional power, thus achieving automatic cleaning of the shovel plate and ensuring the cleanliness of the slag. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the state of the present invention when it is installed on a furnace;

[0025] Figure 2 This is a partial cross-sectional view of the present invention;

[0026] Figure 3 This is a schematic diagram of the flange ring structure in this invention;

[0027] Figure 4 This is a schematic diagram of the rotating plate in this invention;

[0028] Figure 5 This is a schematic diagram of the upper and lower ring frames in the first direction of the present invention;

[0029] Figure 6 This is a schematic diagram of the upper and lower ring frames in the second direction of the present invention;

[0030] Figure 7 This is a schematic diagram of the first state of the first shovel plate in this invention;

[0031] Figure 8This is a schematic diagram of the second state of the first shovel plate in this invention;

[0032] Figure 9 This is a schematic diagram of the third state of the first shovel plate in this invention;

[0033] Figure 10 This is a schematic diagram showing the state after the first and second shovel plates are docked in this invention;

[0034] Figure 11 This is a cross-sectional view of the first and second shovel plates after they are joined together in this invention;

[0035] Figure 12 This is a schematic diagram of the drive wheel structure in this invention.

[0036] In the diagram: 1. Furnace; 2. Collection ring; 3. Discharge pipe; 4. Flange ring; 5. Electric drive turntable; 6. Upper half ring frame; 7. Rotating plate; 8. Rotating shaft; 9. Cleaning block; 10. Tension spring; 11. Cylinder; 12. Lower half ring frame; 13. First shovel plate; 14. Second shovel plate; 15. Drive wheel. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1-12 As shown, the technical solution adopted by the present invention is as follows: A slag removal machine for casting includes a flange ring 4, an electric drive turntable 5, an upper half-ring frame 6, a lower half-ring frame 12, a shovel plate, and a rotating plate 7.

[0039] Flange ring 4 is used for connection to an external robotic arm or other moving mechanism. An electrically driven turntable 5 is rotatably mounted on flange ring 4 and is driven by a power mechanism (not shown in the figure) located on flange ring 4, enabling it to rotate about its own axis.

[0040] Preferably, the power mechanism includes a gear ring fixedly connected to the electric drive turntable 5 and a gear rotatably mounted on the flange ring 4, the gear meshing with the gear ring. A first motor driving the gear rotation is mounted on the flange ring 4.

[0041] Both the upper ring frame 6 and the lower ring frame 12 are equipped with slidably mounted arc-shaped shovels. The two shovels have the same structure and dimensions, and both are provided with filter holes. Both ends of the shovels are beveled to facilitate insertion into the liquid surface.

[0042] The bottom of the electric drive turntable 5 is fixedly connected to an upper semi-ring frame 6, which has an arc-shaped structure. Specifically, as shown... Figure 5 , Figure 6 As shown, the upper ring frame 6 includes a second horizontal bar, an arc-shaped bar, and an arc-shaped tube. One end of the second horizontal bar is fixedly connected to the middle of the arc-shaped bar, and the other end is fixedly connected to one end of the arc-shaped tube. A second arc-shaped groove is provided on the end face of both the arc-shaped bar and the arc-shaped tube to slide with the shovel plate. The end of the shovel plate slides with the second arc-shaped groove.

[0043] like Figure 2 As shown, a rotating plate 7 is rotatably connected to the upper ring frame 6, and rotating shafts 8 are fixedly connected to both ends of the rotating plate 7. One rotating shaft 8 is rotatably connected to the electric drive turntable 5, and the other rotating shaft 8 is rotatably connected to the arc-shaped tube. A second motor is installed on the upper ring frame 6, and the output shaft of the second motor is fixedly connected to one of the rotating shafts 8. Figure 4 As shown, in the initial state, the rotating plate 7 is in a horizontal position, used to block the lower opening of the shovel plate on the upper half ring frame 6, and to support the shovel plate on the upper half ring frame 6 to prevent it from sliding down.

[0044] The lower half-ring frame 12 is vertically connected to the electric drive turntable 5. Specifically, a cylinder 11 is fixedly installed on the electric drive turntable 5. The telescopic end of the cylinder 11 is vertically downward and fixedly connected to the lower half-ring frame 12, thereby driving the lower half-ring frame 12 to move up and down relative to the upper half-ring frame 6.

[0045] like Figure 5 , Figure 6 As shown, the lower half-ring frame 12 includes a first crossbar and two arc-shaped plates, which are fixedly connected to both ends of the first crossbar. The telescopic end of the cylinder 11 is fixedly connected to the corresponding arc-shaped plate. A first arc-shaped groove is provided on the arc-shaped plate to slide with the shovel plate. The end of the shovel plate is slidably disposed in the corresponding first arc-shaped groove.

[0046] like Figure 5 As shown, the upper half-ring frame 6 is positioned directly above the lower half-ring frame 12. The axis of the arc-shaped rod is positioned on the side of the upper half-ring frame 6 closest to the lower half-ring frame 12, and the axis of the arc-shaped plate is positioned on the side of the lower half-ring frame 12 closest to the upper half-ring frame 6.

[0047] For ease of description, the two shovels are defined as the first shovel 13 and the second shovel 14, respectively. Initially, the first shovel 13 is engaged with the lower half-ring frame 12, and the second shovel 14 is located on the upper half-ring frame 6. Figure 7 , Figure 8 as well as Figure 9 The dashed line in the figure represents the liquid level inside furnace 1.

[0048] Extended by cylinder 11, such as Figure 7As shown, the first shovel plate 13 is positioned above the lower half-ring frame 12, and the lower part of the lower half-ring frame 12 is moved down below the liquid surface in the furnace 1, while the first shovel plate 13 is positioned above the liquid surface. At this time, the first shovel plate 13 is in the first state.

[0049] like Figure 8 As shown, the first shovel plate 13 is then slid into the first arc-shaped groove, so that one end of the first shovel plate 13 is inserted into the molten metal in the furnace 1, and one side of the first shovel plate 13 is inserted into the molten metal. At this time, the first shovel plate 13 is in the second state, ready to be retrieved.

[0050] Then, the electric drive turntable 5 is rotated, and the first shovel plate 13 rotates around the axis of the electric drive turntable 5, thereby removing the slag inside the furnace 1. After the removal is completed, the first shovel plate 13 continues to slide into the first arc-shaped groove until the concave surface of the first shovel plate 13 faces upwards, as... Figure 9 As shown, the first shovel plate 13 is in the third state.

[0051] The cylinder 11 is shortened, and the lower half of the ring frame 12 is moved upward until the first shovel plate 13 aligns with the second shovel plate 14, as shown. Figure 11 As shown.

[0052] Then, the first shovel plate 13, the second shovel plate 14, and the rotating plate 7 are rotated synchronously, thereby exchanging the positions of the first shovel plate 13 and the second shovel plate 14. The first shovel plate 13 moves into the upper half of the ring frame 6, and the second shovel plate 14 moves into the lower half of the ring frame 12. Afterward, when the electric drive turntable 5 rotates again, the upper half of the ring frame 6 rotates around the axis of the electric drive turntable 5, throwing out the scum from the first shovel plate 13.

[0053] Both the upper half-ring frame 6 and the lower half-ring frame 12 are equipped with drive wheels 15. The outer surfaces of the first shovel plate 13 and the second shovel plate 14 mate with the drive wheels 15. The outer surfaces of the first shovel plate 13 and the second shovel plate 14 are provided with friction textures to increase friction, so that the drive wheels 15 can smoothly drive the first shovel plate 13 and the second shovel plate 14 to move.

[0054] A cleaning block 9 is elastically slidably mounted on the electric drive turntable 5. Specifically, the electric drive turntable 5 has a tension spring groove, in which a tension spring 10 is installed. One end of the tension spring 10 is fixedly connected to the cleaning block 9, and the other end is fixedly connected to the electric drive turntable 5. Under the action of the tension spring 10, the cleaning block 9 is located at one end of the upper half-ring frame 6. The cleaning block 9 and the upper half-ring frame 6 are in sliding engagement. When the upper half-ring frame 6 rotates around the axis of the electric drive turntable 5, under the action of centrifugal force, the cleaning block 9 slides along the upper half-ring frame 6, thereby cleaning the rotating plate 7 and the corresponding scraper plate.

[0055] A collecting ring 2 is fixedly connected to the top of the furnace 1. The collecting ring 2 is sleeved on the outside of the furnace 1 and is used to receive the scum thrown out from the upper ring frame 6. A discharge pipe 3 is installed on the collecting ring 2, and the collected scum is discharged into an external collecting box through the discharge pipe 3.

[0056] Working principle: Initially, such as Figure 4 As shown, the first shovel plate 13 is engaged with the lower half-ring frame 12, and the second shovel plate 14 is engaged with the upper half-ring frame 6. The second shovel plate 14 is located above the rotating plate 7, which is in a horizontal position, blocking the lower opening of the second shovel plate 14. The second shovel plate 14 remains stationary under the support of the rotating plate 7.

[0057] When it is necessary to clean the scum on the surface of the liquid inside furnace 1, an external robotic arm moves the flange ring 4, the electric drive turntable 5, the lower half-ring frame 12, and the upper half-ring frame 6 together to be directly above furnace 1. The drive wheel 15 on the lower half-ring frame 12 is activated, driving the first shovel plate 13 to rotate relative to the lower half-ring frame 12 to the first state, i.e., the entire assembly is positioned above the lower half-ring frame 12. Then, the cylinder 11 is extended, causing the lower half-ring frame 12 and the first shovel plate 13 to move downwards, so that the lower part of the lower half-ring frame 12 extends below the liquid surface, while the first shovel plate 13 remains above the liquid surface. Figure 7 As shown.

[0058] Then, the drive wheel 15 on the lower half-ring frame 12 is activated again, causing the first shovel 13 to rotate and penetrate below the liquid surface with its end inserted, reducing the amount of scum pressed below the liquid surface and improving retrieval efficiency. Figure 8 As shown, the first shovel plate 13 is in the second state.

[0059] The electric drive turntable 5 is controlled to rotate, which in turn drives the upper half-ring frame 6 and the lower half-ring frame 12 to rotate. During the rotation, the first shovel plate 13 collects the scum on the liquid surface to the inner area of ​​the first shovel plate 13, that is, one side of the concave surface. At the same time, the cleaning block 9 slides outward along the channel formed by the upper half-ring frame 6, the rotating plate 7, and the second shovel plate 14 under the action of centrifugal force, cleaning the second shovel plate 14 and the rotating plate 7.

[0060] The two shovels interchange positions: After the first shovel 13 finishes removing slag, the electric drive turntable 5 stops rotating, and the cleaning block 9 resets. Control the drive wheel 15 on the lower half-ring frame 12 to rotate the first shovel 13 to the third state, where the concave surface faces upwards, as shown... Figure 9 As shown.

[0061] The cylinder 11 shortens, causing the lower half-ring body 12 and the first shovel plate 13 to move upward until the first shovel plate 13 contacts the second shovel plate 14. Figure 10 , Figure 11 As shown.

[0062] Subsequently, the drive wheels 15 on the upper half-ring frame 6 and the lower half-ring frame 12, as well as the second motor driving the rotating plate 7, are simultaneously activated, causing the first shovel plate 13, the second shovel plate 14, and the rotating plate 7 to maintain their relative positions and rotate together by 180 degrees. At this time, the first shovel plate 13 and the second shovel plate 14 have exchanged positions. The first shovel plate 13 enters the upper half-ring frame 6, and the second shovel plate 14 enters the lower half-ring frame 12, with the scum collected by the first shovel plate 13 located in the channel formed by the upper half-ring frame 6, the rotating plate 7, and the first shovel plate 13.

[0063] The control cylinder 11 extends, causing the lower half-ring frame 12 and the second shovel 14 to move downwards. During the downward movement of the lower half-ring frame 12 and the second shovel 14, the drive wheel 15 on the lower half-ring frame 12 is activated, so that the second shovel 14 is in the first state, that is, it is positioned above the lower half-ring frame 12.

[0064] The lower part of the lower ring frame 12 extends into the molten metal, and the cylinder 11 is closed. Then, the drive wheel 15 on the lower ring frame 12 is controlled to move the second shovel 14 into the first arc-shaped groove, so that one end of the second shovel 14 pierces below the liquid surface, and the drive wheel 15 on the lower ring frame 12 is closed. At this time, the second shovel 14 is in the second state.

[0065] The electric drive turntable 5 is restarted, and the upper half-ring frame 6 and the lower half-ring frame 12 rotate around the axis of the electric drive turntable 5. The second shovel plate 14 performs slag removal. The scum in the upper half-ring frame 6 is thrown out into the collection ring 2 under the action of centrifugal force. At the same time, the cleaning block 9 scrapes and cleans the rotating plate 7 and the first shovel plate 13 under the action of centrifugal force, pushing the remaining scum into the collection ring 2.

[0066] Therefore, the above-described process of scooping, exchanging positions, and cleaning is repeated. When the electrically driven turntable 5 rotates, it drives one of the shovels to scoop up slag, while the cleaning block 9 cleans the other shovel. Through the alternating use of the first shovel 13 and the second shovel 14, a cyclical operation of slag removal and automatic cleaning is achieved. The alternating use of the two shovels avoids prolonged contact between a single shovel and high-temperature molten metal and slag, effectively extending the tool's service life.

[0067] Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A slag removal machine for casting, characterized in that: Includes a flange ring (4); an electric drive turntable (5) is rotatably mounted on the flange ring (4), an upper half ring frame (6) is fixedly connected to the electric drive turntable (5), a lower half ring frame (12) is movably connected to the electric drive turntable (5) in the vertical direction, an arc-shaped shovel plate is slidably provided on both the upper half ring frame (6) and the lower half ring frame (12), and a rotating plate (7) is rotatably provided on the upper half ring frame (6); the rotating plate (7) blocks the lower opening of the shovel plate on the upper half ring frame (6); The shovel slides along the lower half of the ring frame (12), so that one end is inserted below the liquid surface, ready to be retrieved; the electric drive turntable (5) rotates, the shovel on the lower half of the ring frame (12) retrieves the scum, and the scum between the shovel on the upper half of the ring frame (6) and the rotating plate (7) is thrown out; the lower half of the ring frame (12) moves up and closes to the upper half of the ring frame (6), so that the two shovels are connected, and then the two shovels and the rotating plate (7) rotate at the same time to exchange the positions of the two shovels.

2. The slag removal machine for casting according to claim 1, characterized in that: A cleaning block (9) is elastically slidably disposed on the electric drive turntable (5), and the cleaning block (9) is slidably engaged with the upper half ring frame (6); when the electric drive turntable (5) rotates, the cleaning block (9) slides outward along the upper half ring frame (6) under the action of centrifugal force to clean the rotating plate (7) and the shovel plate on the upper half ring frame (6).

3. A slag remover for casting according to claim 1, characterized in that: It also includes a collection ring (2), which is fitted on the outside of the furnace (1) to receive slag thrown off the upper ring frame (6).

4. A slag remover for casting according to claim 1, characterized in that: Both the upper half-ring frame (6) and the lower half-ring frame (12) are equipped with drive wheels (15) for driving the shovel plate.

5. A slag remover for casting according to claim 4, characterized in that: The outer surface of the shovel plate that contacts the drive wheel (15) is provided with friction texture to increase friction.

6. A slag remover for casting according to claim 2, characterized in that: The electric drive turntable (5) has a tension spring groove, and a tension spring (10) is provided in the tension spring groove. One end of the tension spring (10) is fixedly connected to the cleaning block (9), and the other end is fixedly connected to the electric drive turntable (5).

7. A slag remover for casting according to claim 1, characterized in that: A cylinder (11) is fixedly installed on the electric drive turntable (5), and the lower half ring frame (12) is fixedly connected to the telescopic end of the cylinder (11).

8. A slag remover for casting according to claim 1, characterized in that: The lower half-ring frame (12) includes a first crossbar and an arc plate. There are two arc plates, which are fixedly connected to the two ends of the first crossbar respectively. The arc plate has a first arc groove for sliding fit of the end of the shovel plate.

9. A slag remover for casting according to claim 1, characterized in that: The upper half ring frame (6) includes a second crossbar, an arc-shaped bar, and an arc-shaped tube; one end of the second crossbar is fixedly connected to the middle of the arc-shaped bar, and the other end is fixedly connected to one end of the arc-shaped tube; a second arc-shaped groove that slides with the end of the shovel plate is provided on the end face of both the arc-shaped bar and the arc-shaped tube.

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