A tundish vacuum pouring slide gate mechanism

Abstract

This utility model discloses a sliding gate mechanism for vacuum casting in an tundish, applied in the field of sliding gate device technology. It includes an upper shell and a lower shell, each with an installation groove on an opposite side. Both the upper and lower shells have guide ports communicating with the installation grooves. An installation plate is positioned between the two installation grooves. Annular guide grooves, slidably connected to annular guide blocks, are provided in both the upper and lower installation grooves. By installing annular guide blocks at the top and bottom of the installation plate, in conjunction with the annular guide grooves inside the installation grooves, when molten steel flows from the tundish through this sliding gate mechanism, the annular guide blocks and annular guide grooves provide a first seal for the permeated molten steel. The sliding sealing ring and sliding sealing groove provide a second seal for the permeated molten steel, effectively preventing steel leakage and improving the sealing effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of sliding gate device, and specifically relates to a sliding gate mechanism for vacuum casting in an tundish. Background Technology

[0002] The tundish vacuum casting process is a crucial vessel in steelmaking, located between a large steelmaking furnace (converter / electric furnace) and a casting mold (crystallizer). It acts as a "transfer station" or "buffer pool," receiving molten steel from the steelmaking furnace and preparing it for continuous casting. The sliding gate is a structure used in the tundish to control the amount of molten steel fed into it. It is a mechanical device that precisely controls the flow of molten steel by moving two perforated refractory bricks. It is like a high-temperature-resistant precision sliding valve installed at the bottom of the tundish.

[0003] For example, Chinese announcement number CN216729543U describes a sliding nozzle device for an intermediate tundish, which facilitates extending the heat conduction distance and reducing heat propagation, thereby reducing harm to operators. The device includes a top plate, a sealing frame fixedly connected to the bottom of the top plate, a drain outlet fixedly connected to the bottom of the sealing frame, a sliding nozzle plate slidably connected inside the sealing frame, two moving toothed belts fixedly connected to the right end of the sliding nozzle plate, a bracket fixedly connected to the right end of the sliding nozzle plate, two power gears rotatably connected to the top of the bracket (each power gear meshes with one of the moving toothed belts), two transmission gears rotatably connected to the top of the bracket (each transmission gear meshes with one of the power gears), sliding boxes fixedly connected to both ends of the sealing frame, and power toothed belts slidably connected inside each of the two sliding boxes (each power toothed belt meshes with one of the transmission toothed belts). Through holes are provided on both the top plate and the sealing frame, and the drain outlet communicates with the through holes.

[0004] In summary, this sliding gate device can control the material feeding path and the amount of material fed. However, there are still some problems in its use. For example, the sliding gate plate slides inside the sealing frame, with one end of the sliding gate plate extending to the outside of the sealing frame. This is the most common structure used in sliding gate devices on the market. This structure has the following defects: the sliding gate plate and the sealing frame are slidably connected, so there will be a very small gap between them. However, under extreme high temperature and static pressure of molten steel, molten steel will slowly seep through the gap. Even a slight leak can quickly expand and lead to a serious accident. Utility Model Content

[0005] The purpose of this invention is to provide a sliding gate mechanism for vacuum casting of intermediate ladles, which has the advantage of preventing leakage.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a sliding gate mechanism for vacuum casting of intermediate ladles, comprising an upper shell and a lower shell, wherein mounting grooves are provided on opposite sides of the upper shell and the lower shell, and guide ports communicating with the mounting grooves are provided on both the upper shell and the lower shell, and a mounting plate is provided between the two mounting grooves, wherein annular guide blocks are fixedly connected to the top and bottom of the mounting plate, and annular guide grooves that are slidably connected to the annular guide blocks are provided in the mounting grooves of the upper shell and the lower shell, wherein a sliding sealing ring is fixedly connected inside the annular guide block, and a sliding sealing groove that is slidably connected to the sliding sealing ring is provided inside the annular guide groove, wherein a first valve block is fixedly connected to the central groove of the mounting plate, and a second valve block that cooperates with the first valve block is fixedly connected to the top of the lower shell and located inside the mounting groove, wherein a toothed ring is fixedly sleeved on the surface of the mounting plate, a transmission mechanism is provided between the two mounting grooves, and a power mechanism is assembled at the bottom of the lower shell.

[0007] The above technical solution is adopted: This utility model has annular guide blocks installed at the top and bottom of the mounting plate, which are used in conjunction with the annular guide groove inside the mounting groove. When molten steel is discharged from the tundish through the sliding gate mechanism, the annular guide blocks and annular guide groove can perform a first seal on the permeated molten steel. The sliding sealing ring and sliding sealing groove perform a second seal on the permeated molten steel, which can effectively prevent the permeation and leakage of molten steel and improve the sealing effect.

[0008] The present invention is further configured such that the transmission mechanism includes a rotating rod rotatably connected between two mounting slots, and a gear meshing with a gear ring is fixedly sleeved on the surface of the rotating rod.

[0009] The above technical solution is adopted: when the rotating rod rotates, it can drive the gear to rotate, and the gear rotation can drive the gear ring to rotate, thereby causing the mounting plate to rotate inside the mounting groove with the annular guide block as the axis.

[0010] The present invention is further configured such that the power mechanism includes a reducer fixedly mounted on the bottom of the lower housing, the output end of the reducer is fixedly connected to one end of the rotating rod, and the input end of the reducer is equipped with a servo motor.

[0011] Using the above technical solution: when the servo motor starts, it can drive the output end of the reducer to rotate, thereby causing the reducer to drive the rotating rod to rotate.

[0012] The present invention is further configured such that a feeding pipe is fixedly connected to the bottom of the lower housing, and the feeding pipe is connected to the guide port of the lower housing.

[0013] The above technical solution facilitates the introduction of molten steel into the casting mold.

[0014] The present invention is further configured such that a plurality of equally spaced fixing seats are fixedly connected to the surface of the upper housing, and fixing holes are provided on the fixing seats.

[0015] The above technical solution facilitates the installation of the sliding gate mechanism at the bottom of the tundish.

[0016] The present invention is further configured such that the upper housing and the lower housing are connected by bolts and threads.

[0017] The above technical solution allows for the detachable connection and fixation of the upper and lower shells together.

[0018] The present invention is further configured such that the material of the annular guide block and the sliding sealing ring is high-density isostatic graphite.

[0019] The above technical solution improves the fire resistance of the annular guide block and the sliding sealing ring.

[0020] In summary, this utility model has the following beneficial effects: 1. This utility model has annular guide blocks installed at the top and bottom of the mounting plate, which work in conjunction with the annular guide groove inside the mounting slot. When molten steel is discharged from the tundish through the sliding gate mechanism, the annular guide blocks and annular guide groove can perform a first seal on the permeated molten steel, and the sliding sealing ring and sliding sealing groove can perform a second seal on the permeated molten steel, which can effectively prevent the permeation and leakage of molten steel and improve the sealing effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural connection diagram of this utility model; Figure 3 This is a partial structural cross-sectional view of the present invention.

[0022] Reference numerals: 1. Upper housing; 2. Lower housing; 3. Mounting groove; 4. Guide port; 5. Mounting plate; 6. Annular guide block; 7. Annular guide groove; 8. Sliding sealing ring; 9. Sliding sealing groove; 10. First valve block; 11. Second valve block; 12. Gear ring; 13. Transmission mechanism; 131. Rotating rod; 132. Gear; 14. Power mechanism; 141. Reducer; 142. Servo motor; 15. Feeding pipe; 16. Fixed base. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Example 1: refer to Figure 1 , Figure 2 and Figure 3 A vacuum casting sliding gate mechanism for intermediate ladles includes an upper housing 1 and a lower housing 2. Each of the upper housing 1 and lower housing 2 has a mounting groove 3 on one opposite side. Both the upper housing 1 and lower housing 2 have a guide port 4 communicating with the mounting groove 3. A mounting plate 5 is disposed between the two mounting grooves 3. Annular guide blocks 6 are fixedly connected to the top and bottom of the mounting plate 5. Annular guide grooves 7, which slidably connect to the annular guide blocks 6, are formed in both the mounting groove 3 of the upper housing 1 and the mounting groove 3 of the lower housing 2. A sliding sealing ring 8 is fixedly connected inside the annular guide block 6. A sliding sealing groove 9, which slidably connects to the sliding sealing ring 8, is formed inside the annular guide groove 7. A first valve block 1 is fixedly connected to the central groove of the mounting plate 5. A second valve block 11, which works in conjunction with the first valve block 10, is fixedly connected to the top of the lower housing 2 and inside the mounting groove 3. A toothed ring 12 is fixedly fitted onto the surface of the mounting plate 5. A transmission mechanism 13 is provided between the two mounting grooves 3. A power mechanism 14 is assembled at the bottom of the lower housing 2. By installing annular guide blocks 6 at the top and bottom of the mounting plate 5, which work in conjunction with the annular guide groove 7 inside the mounting groove 3, when molten steel is discharged from the tundish through the sliding gate mechanism, the annular guide blocks 6 and the annular guide groove 7 can perform a first seal on the permeated molten steel. The sliding sealing ring 8 and the sliding sealing groove 9 perform a second seal on the permeated molten steel, which can effectively prevent the permeation and leakage of molten steel and improve the sealing effect.

[0025] refer to Figure 3 The transmission mechanism 13 includes a rotating rod 131 rotatably connected between two mounting slots 3. A gear 132 that meshes with a gear ring 12 is fixedly sleeved on the surface of the rotating rod 131. By setting the rotating rod 131 and the gear 132, when the rotating rod 131 rotates, it can drive the gear 132 to rotate. The rotation of the gear 132 can drive the gear ring 12 to rotate, thereby causing the mounting plate 5 to rotate inside the mounting slot 3 around the annular guide block 6 as the axis.

[0026] refer to Figure 1 The power mechanism 14 includes a reducer 141 fixedly mounted on the bottom of the lower housing 2. The output end of the reducer 141 is fixedly connected to one end of the rotating rod 131. The input end of the reducer 141 is equipped with a servo motor 142. By setting the reducer 141 and the servo motor 142, when the servo motor 142 is started, it can drive the output end of the reducer 141 to rotate, thereby causing the reducer 141 to drive the rotating rod 131 to rotate.

[0027] refer to Figure 1 and Figure 3 The bottom of the lower shell 2 is fixedly connected to a feeding pipe 15, which is connected to the guide port 4 of the lower shell 2. By setting the feeding pipe 15, it is convenient to introduce molten steel into the casting mold.

[0028] refer to Figure 1and Figure 3 The surface of the upper housing 1 is fixedly connected with a plurality of equally spaced fixing seats 16, and fixing holes are provided on the fixing seats 16. By setting the fixing seats 16, it is convenient to install the sliding gate mechanism to the bottom of the intermediate tundish.

[0029] refer to Figure 1 and Figure 3 The upper housing 1 and the lower housing 2 are connected by bolts and threads. By setting the upper housing 1 and the lower housing 2 to be connected by bolts and threads, it is convenient for the upper housing 1 and the lower housing 2 to be detachably connected and fixed together.

[0030] refer to Figure 2 The annular guide block 6 and the sliding sealing ring 8 are made of high-density isostatic graphite. By setting the material of the annular guide block 6 and the sliding sealing ring 8 to high-density isostatic graphite, the fire resistance of the annular guide block 6 and the sliding sealing ring 8 is improved.

[0031] Brief description of usage: When this sprue mechanism is in use, and material needs to be discharged, an external controller is used to control the servo motor 142. The servo motor 142 drives the reducer 141, which in turn drives the rotating rod 131. The rotating rod 131 drives the gear 132, which in turn drives the gear ring 12. This causes the mounting plate 5 to rotate within the two mounting slots 3. The rotation of the mounting plate 5 causes the first valve block 10 to rotate, aligning the first valve block 10 and the second valve block 11. Molten steel then passes through the first valve block 10 and the second valve block 11. The gap 1 enables material feeding and controls the amount of material fed. In reverse operation, the first valve block 10 and the second valve block 11 are staggered and block each other, thus closing the feeding passage. The material passes through the annular guide block 6 and works in conjunction with the annular guide groove 7 inside the mounting groove 3. When molten steel is fed from the tundish through this sliding gate mechanism, the annular guide block 6 and the annular guide groove 7 can perform a first seal on the permeated molten steel. The sliding sealing ring 8 and the sliding sealing groove 9 perform a second seal on the permeated molten steel, which can effectively prevent the permeation and leakage of molten steel and improve the sealing effect.

[0032] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0033] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A sliding gate mechanism for vacuum casting of tundishes, comprising an upper housing (1) and a lower housing (2), characterized in that: The upper shell (1) and the lower shell (2) each have a mounting groove (3) on opposite sides. The upper shell (1) and the lower shell (2) each have a guide port (4) communicating with the mounting groove (3). A mounting plate (5) is provided between the two mounting grooves (3). The top and bottom of the mounting plate (5) are fixedly connected with annular guide blocks (6). The mounting groove (3) of the upper shell (1) and the mounting groove (3) of the lower shell (2) each have annular guide grooves (7) that are slidably connected to the annular guide blocks (6). The annular guide blocks (6) are fixedly connected to a sliding... The sealing ring (8) has a sliding sealing groove (9) inside the annular guide groove (7) that is slidably connected to the sliding sealing ring (8). The first valve block (10) is fixedly connected to the center groove of the mounting plate (5). The second valve block (11) that works with the first valve block (10) is fixedly connected to the top of the lower housing (2) and inside the mounting groove (3). The toothed ring (12) is fixedly sleeved on the surface of the mounting plate (5). A transmission mechanism (13) is provided between the two mounting grooves (3). A power mechanism (14) is assembled at the bottom of the lower housing (2).

2. The tundish vacuum casting sliding gate mechanism according to claim 1, characterized in that: The transmission mechanism (13) includes a rotating rod (131) rotatably connected between two mounting slots (3), and a gear (132) that meshes with a gear ring (12) is fixedly sleeved on the surface of the rotating rod (131).

3. The tundish vacuum casting sliding gate mechanism according to claim 2, characterized in that: The power mechanism (14) includes a reducer (141) fixedly mounted on the bottom of the lower housing (2). The output end of the reducer (141) is fixedly connected to one end of the rotating rod (131). The input end of the reducer (141) is equipped with a servo motor (142).

4. The tundish vacuum casting sliding gate mechanism according to claim 1, characterized in that: The bottom of the lower housing (2) is fixedly connected to a feeding pipe (15), which is connected to the feed inlet (4) of the lower housing (2).

5. The tundish vacuum casting sliding gate mechanism according to claim 1, characterized in that: The surface of the upper housing (1) is fixedly connected with a plurality of equally spaced fixing seats (16), and fixing holes are provided on the fixing seats (16).

6. The tundish vacuum casting sliding gate mechanism according to claim 1, characterized in that: The upper housing (1) and the lower housing (2) are connected by bolts and threads.

7. The tundish vacuum casting sliding gate mechanism according to claim 1, characterized in that: The annular guide block (6) and the sliding sealing ring (8) are made of high-density isostatic graphite.

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