A vacuum device for a ladle refining furnace

Abstract

This utility model relates to the technical field of ladle refining furnaces and discloses a vacuum device for a ladle refining furnace, including a furnace body. A butterfly valve is fixedly connected to the outer wall of the furnace body, and a filter tank is fixedly connected to one end of the butterfly valve. A connecting pipe is fixedly connected to the outer wall of the filter tank, and a vacuum pump is fixedly connected to one end of the connecting pipe. The input end of the vacuum pump is connected to one end of the connecting pipe. A filter assembly is provided inside the filter tank. The filter assembly includes a limiting ring, the outer wall of which is fixedly connected to the inner wall of the filter tank, and a filter screen is provided inside the limiting ring. In this utility model, the filter screen is supported by a frame and limited within the filter tank by the limiting ring. The frame is locked within the filter tank by a locking pin, achieving the effect of filtering impurities and limiting the position of the filter screen. This solves the problem that impurities such as iron filings in the refining furnace can easily damage the pump body when the vacuum pump is drawing air, thus improving the practicality of the vacuum device.

Description

Technical Field

[0001] This utility model relates to the field of ladle refining furnace technology, and in particular to a vacuum device for a ladle refining furnace. Background Technology

[0002] A ladle refining furnace is a piece of equipment used for refining molten steel. In the steel production process, it effectively removes impurities from molten steel, adjusts its composition, and improves its quality. Ladle refining furnaces are typically equipped with a vacuum system to reduce the gas content within the ladle, helping to remove harmful gases (such as hydrogen, nitrogen, and oxygen) from the molten steel, while simultaneously controlling the impurity content, thereby improving the quality and performance of the final product. The vacuum system plays a crucial role in the refining process, improving the purity and strength of the steel by optimizing the removal of gases and impurities, meeting the stringent quality requirements of high-end industrial applications.

[0003] In existing ladle refining furnaces, vacuum pumps are typically used to extract gas from inside the ladle to the outside, reducing the furnace pressure and creating a vacuum environment. During this process, filters and frame structures are often used to isolate solid impurities, preventing them from entering the pump and damaging it. Traditional vacuum devices generally consist of a vacuum pump, filter tank, filter screen, frame, and limiting components. The filter screen is supported by the frame and limited within the filter tank by limiting rings to ensure its position remains fixed, preventing impurities such as iron filings from entering the vacuum pump and affecting its efficiency and lifespan. The opening and closing of the top cover is usually done manually or mechanically, but traditional top cover opening and closing often relies on large equipment, making the operation cumbersome and time-consuming.

[0004] Although existing vacuum devices for ladle refining furnaces can remove gases and impurities to some extent, a significant problem remains: during vacuum pump operation, impurities such as iron filings in the filter can easily damage the pump body. The presence of these impurities reduces the efficiency of the vacuum pump and can even lead to pump damage, thus affecting the stability of the refining process and the quality of the steel. Traditional top cover opening and closing methods are also cumbersome, requiring large equipment and causing operational inconvenience. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a vacuum device for a ladle refining furnace, which aims to improve the problem that impurities such as iron filings in the refining furnace can easily damage the pump body when the vacuum pump is drawing air.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a vacuum device for a ladle refining furnace, comprising a furnace body, a butterfly valve fixedly connected to the outer wall of the furnace body, a filter tank fixedly connected to one end of the butterfly valve, a connecting pipe fixedly connected to the outer wall of the filter tank, a vacuum pump fixedly connected to one end of the connecting pipe, the input end of the vacuum pump being connected to one end of the connecting pipe, and a filter assembly being provided inside the filter tank.

[0007] The filter assembly includes a limiting ring, the outer wall of which is fixedly connected to the inner wall of the filter tank. A filter screen is disposed inside the limiting ring, and a frame is fixedly connected to the top of the filter screen. A telescopic column is threadedly connected to the outer wall of the filter tank, and a telescopic column one is fixedly connected to the bottom. A telescopic column two is slidably connected inside the telescopic column one. A reset component is disposed inside the telescopic column one, and a limiting component is disposed inside the filter tank.

[0008] As a further description of the above technical solution:

[0009] The reset assembly includes a first spring, which is sleeved inside the first telescopic column. One end of the first spring is fixedly connected inside the first telescopic column, and the other end of the first spring is fixedly connected to the top of the second telescopic column.

[0010] As a further description of the above technical solution:

[0011] The limiting component includes a limiting plate that is slidably connected inside the filter tank. A locking post is fixedly connected to one side of the limiting plate and is fitted into the frame. A second spring is provided inside the filter tank. One end of the second spring is fixedly connected to the other side of the limiting plate, and the other end of the second spring is fixedly connected to the inside of the limiting plate.

[0012] As a further description of the above technical solution:

[0013] A first connecting block is fixedly connected to the outer wall of the furnace body, and a second connecting block is fixedly connected to the outer wall of the furnace body.

[0014] As a further description of the above technical solution:

[0015] An electric push rod is rotatably connected inside the first connecting block, and the output end of the electric push rod is fixedly connected to the third connecting block.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the connecting block three is rotatably connected to a bracket, and the bracket is rotatably connected to the outer wall of the connecting block two.

[0018] As a further description of the above technical solution:

[0019] A top cover is fixedly connected to one side of the bracket, and a slot is provided inside the top cover.

[0020] As a further description of the above technical solution:

[0021] The outer wall of the furnace body is rotatably connected with fastening bolts, which engage with slots.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the filter screen is first supported by the frame and limited in the filter tank by the limiting ring. The frame is locked in the filter tank by the locking pin, which achieves the effect of filtering impurities and limiting the filter screen. This solves the problem that impurities such as iron filings in the refining furnace can easily damage the pump body when the vacuum pump is drawing air, and improves the practicality of the vacuum device.

[0024] 2. In this utility model, the output end of the electric push rod retracts and connects to the bracket through the connecting block three, thereby driving the top cover to rotate around the bracket and the connecting block two as the center, achieving the effect of automatic opening of the top cover. This solves the problem that the traditional top cover requires large equipment to open and close, which is quite cumbersome, and improves the convenience of the ladle refining furnace. Attached Figure Description

[0025] Figure 1 This is a perspective view of a vacuum device for a ladle refining furnace according to the present invention.

[0026] Figure 2 This is a schematic diagram of the internal structure of the filter tank of the vacuum device for a ladle refining furnace proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the support structure for the vacuum device of a ladle refining furnace proposed in this utility model.

[0028] Legend:

[0029] 1. Furnace body; 2. Butterfly valve; 3. Filter tank; 4. Connecting pipe; 5. Vacuum pump; 6. Sealing cover; 7. Telescopic column one; 8. Telescopic column two; 9. First spring; 10. Limiting ring; 11. Frame; 12. Filter screen; 13. Limiting plate; 14. Locking column; 15. Second spring; 16. Connecting block one; 17. Electric push rod; 18. Connecting block two; 19. Bracket; 20. Connecting block three; 21. Top cover; 22. Fastening bolt; 23. Slot. Detailed Implementation

[0030] 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.

[0031] Reference Figure 1 and Figure 2 The present invention provides an embodiment of a vacuum device for a ladle refining furnace, comprising a furnace body 1, a butterfly valve 2 fixedly connected to the outer wall of the furnace body 1, a filter tank 3 fixedly connected to one end of the butterfly valve 2, a connecting pipe 4 fixedly connected to the outer wall of the filter tank 3, a vacuum pump 5 fixedly connected to one end of the connecting pipe 4, the input end of the vacuum pump 5 being connected to one end of the connecting pipe 4, and a filter assembly being provided inside the filter tank 3.

[0032] The filter assembly includes a limiting ring 10, whose outer wall is fixedly connected to the inner wall of the filter tank 3. A filter screen 12 is housed inside the limiting ring 10, and a frame 11 is fixedly connected to the top of the filter screen 12. The frame 11 provides support for the filter screen 12, ensuring its stability during filtration and effectively filtering out solid impurities from the ladle refining process. This prevents these impurities from entering the vacuum pump 5, which could damage the pump or reduce its efficiency. A sealing cap 6 is threaded onto the outer wall of the filter tank 3, and a telescopic column 7 is fixedly connected to the bottom of the sealing cap 6. The telescopic column 7 connects and supports the filter tank 3 and the vacuum pump 5, ensuring the sealing and stability between the filter tank 3 and the pump. A second telescopic column 8 is slidably connected inside the first telescopic column 7. The design of the second telescopic column 8 allows the entire filter assembly to extend and retract as needed during operation, adapting to different working spaces and conditions. The telescopic column 7 is equipped with a reset assembly, which includes a first spring 9. The first spring 9 is sleeved inside the telescopic column 7, with one end fixedly connected to the inside of the telescopic column 7 and the other end fixedly connected to the top of the telescopic column 8. This ensures that the filter assembly can automatically reset during use, guaranteeing that it is always in a normal working state. The filter tank 3 is equipped with a limit assembly, which includes a limit plate 13. The limit plate 13 is slidably connected inside the filter tank 3. The design of the limit plate 13 ensures the stability of the filter assembly during operation, preventing displacement and ensuring consistent filtration effect. A locking post 14 is fixedly connected to one side of the limit plate 13. The locking post 14 engages with the frame 11, preventing the filter screen 12 from loosening from the frame 11 and ensuring filtration effect. The filter tank 3 is equipped with a second spring 15. One end of the second spring 15 is fixedly connected to the other side of the limiting plate 13, and the other end of the second spring 15 is fixedly connected to the inside of the limiting plate 13. The function of the second spring 15 is to provide appropriate rebound force for the limiting plate 13, so as to ensure that it can move smoothly and return to the initial position during operation.

[0033] Reference Figure 3A connecting block 16 is fixedly connected to the outer wall of furnace body 1. Connecting block 16 provides a sturdy support point, ensuring that subsequent connecting components can be firmly fixed to furnace body 1. A connecting block 28 is also fixedly connected to the outer wall of furnace body 1. Connecting block 28 cooperates with connecting block 16, enhancing the stability and structural strength of the connection and ensuring that components will not loosen under high temperature and working pressure. An electric push rod 17 is rotatably connected inside connecting block 16. The main function of electric push rod 17 is to provide thrust through electric drive to realize the movement of other components. A connecting block 3 20 is fixedly connected to the output end of electric push rod 17. Connecting block 3 20 transmits the movement of the push rod to bracket 19, ensuring the continuity of the entire operation. A bracket 19 is rotatably connected to the outer wall of connecting block 3 20. Bracket 19 provides rotational support, allowing the top cover 21 to open or close as needed. The bracket 19 is rotatably connected to the outer wall of the connecting block 18. This rotatable connection design ensures that the bracket 19 can be flexibly adjusted during operation and stably fixed when necessary, preventing unnecessary displacement due to external forces. A top cover 21 is fixedly connected to one side of the bracket 19. The top cover 21 is the upper covering component of the furnace body 1, protecting the materials inside the furnace and allowing for easy opening and operation when needed. A slot 23 is provided inside the top cover 21, which engages with the fastening bolt 22 to ensure a secure installation. The fastening bolt 22 is rotatably connected to the outer wall of the furnace body 1, engaging with the slot 23 to lock the top cover 21. Driven by the electric push rod 17, the fastening bolt 22 automatically engages or disengages from the slot 23, easily opening or closing the top cover 21.

[0034] Working principle: When using the vacuum device of this ladle refining furnace, during the refining process in the furnace body 1, the vacuum pump 5 input end extracts the air from the furnace body 1. At the same time, the air enters the filter screen 12 in the filter tank 3 for filtration, preventing damage to the vacuum pump 5 and the external air. The filter screen 12 is supported by the frame 11 and limited in the filter tank 3 by the limiting ring 10. The frame 11 is locked in the filter tank 3 by the locking post 14. The locking post 14 is limited in the filter tank 3 by the limiting plate 13 and supported by the tension of the second spring 15 so that it can be fitted into the frame 11. Then, the telescopic post 8 at the bottom of the sealing cover 6 is supported by the tension of the first spring 9 so that the bottom of the telescopic post 8 is attached to the frame 11 to prevent separation, thus achieving the effect of filtering impurities and limiting the filter screen 12.

[0035] When it is necessary to open the furnace body 1 for observation, first loosen the fastening bolt 22 to separate it from the slot 23. Then, the output end of the electric push rod 17 retracts and connects to the bracket 19 through the connecting block 3 20, thereby driving the top cover 21 to rotate around the bracket 19 and the connecting block 2 18 as the center, opening the furnace body 1. The bottom of the electric push rod 17 rotates on the outer wall of the furnace body 1 through the connecting block 1 16, achieving the effect of automatic opening of the cover.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum installation for a ladle furnace, comprising a furnace body (1), characterized in that: A butterfly valve (2) is fixedly connected to the outer wall of the furnace body (1). A filter tank (3) is fixedly connected to one end of the butterfly valve (2). A connecting pipe (4) is fixedly connected to the outer wall of the filter tank (3). A vacuum pump (5) is fixedly connected to one end of the connecting pipe (4). The input end of the vacuum pump (5) is connected to one end of the connecting pipe (4). A filter assembly is installed inside the filter tank (3). The filter assembly includes a limiting ring (10), the outer wall of which is fixedly connected to the inner wall of the filter tank (3). A filter screen (12) is provided inside the limiting ring (10). A frame (11) is fixedly connected to the top of the filter screen (12). A sealing cap (6) is threadedly connected to the outer wall of the filter tank (3). A telescopic column one (7) is fixedly connected to the bottom of the sealing cap (6). A telescopic column two (8) is slidably connected inside the telescopic column one (7). A reset assembly is provided inside the telescopic column one (7). A limiting assembly is provided inside the filter tank (3).

2. A vacuum unit for a ladle furnace as claimed in claim 1, characterized in that: The reset assembly includes a first spring (9), which is sleeved inside the first telescopic column (7). One end of the first spring (9) is fixedly connected inside the first telescopic column (7), and the other end of the first spring (9) is fixedly connected to the top of the second telescopic column (8).

3. A vacuum unit for a ladle furnace as claimed in claim 1, characterized in that: The limiting component includes a limiting plate (13), which is slidably connected inside the filter tank (3). A locking post (14) is fixedly connected to one side of the limiting plate (13), and the locking post (14) is fitted into the frame (11). A second spring (15) is provided inside the filter tank (3). One end of the second spring (15) is fixedly connected to the other side of the limiting plate (13), and the other end of the second spring (15) is fixedly connected inside the limiting plate (13).

4. A vacuum unit for a ladle furnace as claimed in claim 1, characterized in that: A connecting block one (16) is fixedly connected to the outer wall of the furnace body (1), and a connecting block two (18) is fixedly connected to the outer wall of the furnace body (1).

5. A vacuum installation for a ladle furnace as claimed in claim 4, characterized in that An electric push rod (17) is rotatably connected inside the first connecting block (16), and the output end of the electric push rod (17) is fixedly connected to the third connecting block (20).

6. The vacuum device for a ladle refining furnace according to claim 5, characterized in that: The outer wall of the connecting block three (20) is rotatably connected to a bracket (19), and the bracket (19) is rotatably connected to the outer wall of the connecting block two (18).

7. A vacuum installation for a ladle furnace as claimed in claim 6, characterized in that The bracket (19) is fixedly connected to a top cover (21) on one side, and the top cover (21) has a slot (23) inside.

8. A vacuum unit for a ladle furnace as claimed in claim 1, characterized in that: The outer wall of the furnace body (1) is rotatably connected with fastening bolts (22), and the fastening bolts (22) are engaged with the slots (23).

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