Converter tilting trunnion seal and automatic slag discharge device
By combining a multi-stage sealing structure with inert nitrogen gas, the problem of poor sealing performance in the converter was solved, achieving stable operation of the converter and improved bearing durability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINAN IRON & STEEL GRP INT ENG CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-24
AI Technical Summary
The existing sealing structure of converters is not effective when used in high-temperature environments, resulting in lubricating grease leakage and deterioration of bearing performance, which affects the normal operation of the converter and the service life of the bearings.
It adopts a multi-stage sealing structure, utilizes graphite sealing rings and connecting components, and combines inert gas nitrogen to enhance the sealing effect. The drive component realizes the converter's material discharge and slag removal functions, enhancing the convenience of the device.
It improved the sealing effect, extended the service life of the bearings, enhanced the stability and convenience of the converter, and increased the durability of the bearings.
Smart Images
Figure CN224548456U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metallurgical equipment technology, and more specifically, to a converter tilting trunnion seal and automatic slag discharge device. Background Technology
[0002] The trunnion is a crucial supporting component of a converter, typically housing bearings to ensure smooth rotation of the furnace body during charging, tapping, and slag removal. Due to the high temperatures and large amounts of slag and dust in the converter's operating environment, the trunnion area is highly susceptible to corrosion from high-temperature slag. Current technologies often employ single mechanical seals or packing seals, which offer limited sealing effectiveness. Slag and dust can easily enter the trunnion support, leading to lubricant contamination, bearing wear, and even failure.
[0003] Utility model patent CN220769972U discloses a sealing device for a converter trunnion bearing, including a sealing end cap disposed on the end face of the bearing seat and a sealing gland press-fitted outside the sealing end cap. A combined sealing element is disposed within the annular cavity formed by the sealing end cap and the sealing gland. The combined sealing element includes an inner sealing ring disposed beside the sealing end cap, an outer sealing ring disposed beside the sealing gland, and a sealing partition disposed between the inner and outer sealing rings. A clamping screw passes through the sealing gland, with one end entering the annular cavity and pressing against the outer sealing ring, so that the inner sealing ring is tightly fitted to the sealing end cap. Both ends of the sealing partition are tightly fitted to the inner and outer sealing rings, respectively. By optimizing the sealing and clamping components, the sealing performance is significantly improved, preventing axial and radial leakage of lubricating grease. While the above device can prevent lubricating grease leakage, in use, it cannot improve the sealing effect through a multi-stage sealing structure. Prolonged use in high-temperature environments can lead to deterioration of bearing performance, affecting the normal operation of the converter and the service life of the bearing.
[0004] Therefore, we made improvements by proposing a converter tilting trunnion seal and an automatic slag discharge device. Utility Model Content
[0005] The purpose of this invention is to address the problem that existing converters cannot improve the sealing effect through multi-stage sealing structures, and that prolonged use in high-temperature environments leads to deterioration of bearing performance.
[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution: The converter tilting trunnion seal and automatic slag discharge device are used to improve the above problems.
[0007] The application is as follows: It includes a first support plate and a second support plate. A first trunnion is installed on the first support plate and a second trunnion is installed on the second support plate. A drive assembly is installed between the first support plate and the first trunnion. A converter body is fixedly connected between the first trunnion and the second trunnion. A first bearing is installed inside the second support plate and a second bearing is installed inside the first support plate. A first sealing cover, a second sealing cover, a connecting assembly, and a vacuum pump are installed on both the first and second support plates. A third connecting pipe is installed between the vacuum pump and the first sealing cover. The connecting component includes an air pump mounted on a first support plate and a second support plate. The air pump is equipped with a heat insulation shell, and a first connecting pipe is connected to the heat insulation shell. A one-way air pressure valve is installed on the first connecting pipe, and a second connecting pipe is installed on the one-way air pressure valve.
[0008] As a preferred technical solution of this application, the first trunnion, the second trunnion, and the converter body are fixedly connected as an integral structure, and the central axes of the first trunnion and the second trunnion are collinear.
[0009] As a preferred technical solution of this application, the drive assembly includes a motor fixedly connected to a first support plate, a first gear fixedly connected to the output shaft of the motor, a second gear meshing above the first gear, and a fixed connection between the second gear and the first trunnion.
[0010] As a preferred technical solution of this application, the motor is a servo motor, and a discharge pipe is installed on the converter body.
[0011] As a preferred technical solution of this application, the first sealing cover and the second sealing cover are symmetrically distributed on the front and rear sides of the first support plate, and a first graphite sealing ring and a second graphite sealing ring are fixedly connected to both the first sealing cover and the second sealing cover.
[0012] As a preferred technical solution of this application, the first sealing cover, the second sealing cover, the first graphite sealing ring, and the second graphite sealing ring are all connected to the first support plate, the second support plate, the first bearing, and the second bearing in the same way.
[0013] As a preferred technical solution of this application, the first bearing includes a second outer race fixedly connected to a first trunnion, a first outer race mounted on the outer side of the second outer race, and cylindrical rollers mounted between the first outer race and the second outer race.
[0014] As a preferred technical solution of this application, the cylindrical rollers are distributed at equal angles between the first outer race and the second outer race, and the first outer race and the first support plate are fixedly connected.
[0015] As a preferred technical solution of this application, a cavity is formed between the first outer seat ring, the second outer seat ring, the first sealing cover, the second sealing cover, the first graphite sealing ring, and the second graphite sealing ring, which communicates with the second connecting pipe and the third connecting pipe.
[0016] As a preferred technical solution of this application, the bottom of the second connecting tube is in communication with the inside of the second sealing cap, and the bottom of the third connecting tube is in communication with the inside of the first sealing cap.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. By using a first graphite sealing ring, a second graphite sealing ring, and a connecting component, multi-level sealing and protection functions are achieved. The first and second graphite sealing rings can fit together with the bearings at their respective positions, thereby enhancing the sealing effect of the first and second trunnions during rotation. A cavity is formed between the first outer bearing ring, the second outer bearing ring, the first sealing cover, the second sealing cover, the first graphite sealing ring, and the second graphite sealing ring. This cavity can be filled with nitrogen gas through the connecting component, thereby using inert gas to enhance bearing durability and reduce the adverse effects of high temperatures on the bearing. This device not only improves the sealing effect but also extends the service life of the bearing.
[0018] 2. The device can switch between material discharge and slag discharge through the set drive components and discharge pipe. The first gear drives the second gear to rotate, and through deceleration and torque increase, it drives the first trunnion and converter to rotate. When the converter rotates towards the side of the discharge pipe, molten steel can be discharged through the discharge pipe. When the converter rotates in the opposite direction, the slag discharge function can be realized, which enhances the convenience of the device when it is used. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the first trunnion and the second sealing cap of this utility model; Figure 3 This is a schematic diagram of the connection structure between the motor and the first gear of this utility model; Figure 4 This is a schematic diagram of the internal structure of the first sealing cap of this utility model; Figure 5 This is a schematic diagram of the connection structure between the first gear and the second gear of this utility model; Figure 6 This is a cross-sectional view of the first support plate of this utility model.
[0020] The diagram shows: 1. First support plate; 2. Second support plate; 3. First trunnion; 4. Drive assembly; 401. Motor; 402. First gear; 403. Second gear; 5. Second trunnion; 6. Converter body; 7. Discharge pipe; 8. First sealing cover; 9. Second sealing cover; 10. First graphite sealing ring; 11. Second graphite sealing ring; 12. First bearing; 1201. First outer bearing ring; 1202. Second outer bearing ring; 1203. Cylindrical roller; 13. Second bearing; 14. Connecting assembly; 1401. Air pump; 1402. Heat insulation shell; 1403. First connecting pipe; 1404. One-way pressure valve; 1405. Second connecting pipe; 15. Vacuum pump; 16. Third connecting pipe. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.
[0022] Example 1: like Figures 1-6 As shown, this embodiment proposes a converter tilting trunnion sealing and automatic slag discharge device, including a first support plate 1 and a second support plate 2. A first trunnion 3 is installed on the first support plate 1, and a second trunnion 5 is installed on the second support plate 2. A drive assembly 4 is installed between the first support plate 1 and the first trunnion 3. A converter body 6 is fixedly connected between the first trunnion 3 and the second trunnion 5. A first bearing 12 is installed inside the second support plate 2, and a second bearing 13 is installed inside the first support plate 1. A first sealing cover 8, a second sealing cover 9, a connecting assembly 14, and a vacuum pump 15 are installed on both the first support plate 1 and the second support plate 2. A third connecting pipe 16 is installed between the vacuum pump 15 and the first sealing cover 8. The vacuum pump 15 removes the gas from the first bearing 12 and the second bearing 13 through the third connecting pipe 16 so that nitrogen can be injected subsequently. The first sealing cover 8 and the second sealing cover 9 are used to reduce the impact of high temperature on the bearings. The connecting component 14 includes an air pump 1401 mounted on a first support plate 1 and a second support plate 2. A heat insulation shell 1402 is mounted on the air pump 1401. A first connecting pipe 1403 is connected to the heat insulation shell 1402. A one-way pressure valve 1404 is mounted on the first connecting pipe 1403. A second connecting pipe 1405 is mounted on the one-way pressure valve 1404. Nitrogen gas in the heat insulation shell 1402 is transported by the air pump 1401 to the one-way pressure valve 1404 through the first connecting pipe 1403. When the pressure increases, the one-way pressure valve 1404 can transport the gas to the second connecting pipe 1405, and then to the bearing area to ensure the durability of the bearing.
[0023] Example 2: The solution in Example 1 will be further described below with reference to its specific working method. like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, the first trunnion 3, the second trunnion 5 and the converter body 6 are further fixedly connected as an integral structure, the first trunnion 3, the second trunnion 5 and the converter body 6 can rotate synchronously, and the central axes of the first trunnion 3 and the second trunnion 5 are collinear, ensuring that the first trunnion 3 can drive the converter body 6 to rotate stably when it rotates.
[0024] like Figure 1 As shown, in a preferred embodiment, based on the above method, the drive assembly 4 further includes a motor 401 fixedly connected to the first support plate 1. A first gear 402 is fixedly connected to the output shaft of the motor 401. A second gear 403 is meshed above the first gear 402. The second gear 403 is fixedly connected to the first trunnion 3. The motor 401 is a servo motor to ensure the accuracy of adjustment. A discharge pipe 7 is installed on the converter body 6. The motor 401 drives the first gear 402 to rotate, and the first gear 402 drives the second gear 403 and the first trunnion 3 to rotate, thereby realizing the function of deceleration and torque increase, and ensuring the stability of the device during material discharge.
[0025] like Figures 4-6 As shown, in a preferred embodiment, based on the above method, the first sealing cover 8 and the second sealing cover 9 are symmetrically distributed on the front and rear sides of the first support plate 1. The first sealing cover 8 and the second sealing cover 9 are each fixedly connected with a first graphite sealing ring 10 and a second graphite sealing ring 11. The first graphite sealing ring 10 and the second graphite sealing ring 11 can improve the sealing effect of the device. The connection method of the first sealing cover 8, the second sealing cover 9, the first graphite sealing ring 10 and the second graphite sealing ring 11 with the first support plate 1, the second support plate 2, the first bearing 12 and the second bearing 13 is the same, ensuring that the first bearing 12 and the second bearing 13 can achieve multi-level sealing function.
[0026] like Figure 6As shown, in a preferred embodiment, based on the above method, the first bearing 12 further includes a second outer race 1202 fixedly connected to the first trunnion 3. A first outer race 1201 is mounted on the outer side of the second outer race 1202. A cylindrical roller 1203 is installed between the first outer race 1201 and the second outer race 1202. The cylindrical roller 1203 is distributed at equal angles between the first outer race 1201 and the second outer race 1202. The first outer race 1201 is fixedly connected to the first support plate 1. The gap between the first outer race 1201, the second outer race 1202, and the cylindrical roller 1203 on the first bearing 12 can be used for nitrogen injection, thereby enhancing the overall stability of the device.
[0027] like Figure 6 As shown, in a preferred embodiment, based on the above method, a cavity is further formed between the first outer bearing ring 1201, the second outer bearing ring 1202, the first sealing cover 8, the second sealing cover 9, the first graphite sealing ring 10, and the second graphite sealing ring 11, which communicates with the second connecting pipe 1405 and the third connecting pipe 16. The bottom of the second connecting pipe 1405 communicates with the inside of the second sealing cover 9, and the bottom of the third connecting pipe 16 communicates with the inside of the first sealing cover 8. The cavity in the device can be evacuated through the third connecting pipe 16 first, and then nitrogen can be injected through the second connecting pipe 1405 to improve the protection effect of the bearing.
[0028] Specifically, when using the tilting trunnion seal and automatic slag discharge device of this converter: (e.g.) Figures 1-4 As shown, motor 401 drives first gear 402 to rotate, first gear 402 drives second gear 403 and first trunnion 3 to rotate, thereby realizing the function of speed reduction and torque increase, driving first trunnion 3 and converter body 6 to rotate, second trunnion 5 to rotate on second support plate 2. When the converter rotates towards the discharge pipe 7, molten steel can be discharged through discharge pipe 7. When the converter rotates in the opposite direction, slag can be discharged through the opening at the top of converter body 6.
[0029] like Figures 2-6 As shown, since a cavity is formed between the first outer race 1201, the second outer race 1202, the first sealing cover 8, the second sealing cover 9, the first graphite sealing ring 10, and the second graphite sealing ring 11, which is connected to the second connecting pipe 1405 and the third connecting pipe 16, when the device is in use, the vacuum pump 15 and the third connecting pipe 16 are used to remove the gas from the first bearing 12 and the second bearing 13. Then, the nitrogen gas in the heat insulation shell 1402 is transported to the one-way pressure valve 1404 through the first connecting pipe 1403 by the air pump 1401. After the pressure of the one-way pressure valve 1404 increases to a certain level, the nitrogen gas in the heat insulation shell 1402 will be transported to the second connecting pipe 1405, and then to the cavity in the bearing area. The inert gas ensures the durability of the bearing.
Claims
1. A converter tilting trunnion seal and automatic slag discharge device, comprising a first support plate (1) and a second support plate (2), characterized in that, A first trunnion (3) is installed on the first support plate (1), a second trunnion (5) is installed on the second support plate (2), a drive assembly (4) is installed between the first support plate (1) and the first trunnion (3), a converter body (6) is fixedly connected between the first trunnion (3) and the second trunnion (5), a first bearing (12) is installed inside the second support plate (2), a second bearing (13) is installed inside the first support plate (1), a first sealing cover (8), a second sealing cover (9), a connecting assembly (14) and a vacuum pump (15) are installed on both the first support plate (1) and the second support plate (2), and a third connecting pipe (16) is installed between the vacuum pump (15) and the first sealing cover (8); The connecting component (14) includes an air pump (1401) mounted on a first support plate (1) and a second support plate (2). An insulation shell (1402) is mounted on the air pump (1401). A first connecting pipe (1403) is connected to the insulation shell (1402). A one-way air pressure valve (1404) is mounted on the first connecting pipe (1403). A second connecting pipe (1405) is mounted on the one-way air pressure valve (1404).
2. The converter tilting trunnion seal and automatic slag discharge device according to claim 1, characterized in that, The first trunnion (3), the second trunnion (5) and the converter body (6) are fixedly connected as an integral structure, and the central axes of the first trunnion (3) and the second trunnion (5) are collinear.
3. The converter tilting trunnion seal and automatic slag discharge device according to claim 1, characterized in that, The drive assembly (4) includes a motor (401) fixedly connected to the first support plate (1), a first gear (402) fixedly connected to the output shaft of the motor (401), a second gear (403) meshing above the first gear (402), and the second gear (403) and the first trunnion (3) are fixedly connected.
4. The converter tilting trunnion seal and automatic slag discharge device according to claim 3, characterized in that, The motor (401) is a servo motor, and the converter body (6) is equipped with a discharge pipe (7).
5. The converter tilting trunnion seal and automatic slag discharge device according to claim 1, characterized in that, The first sealing cover (8) and the second sealing cover (9) are symmetrically distributed on the front and rear sides of the first support plate (1). The first sealing cover (8) and the second sealing cover (9) are fixedly connected with the first graphite sealing ring (10) and the second graphite sealing ring (11).
6. The converter tilting trunnion seal and automatic slag discharge device according to claim 5, characterized in that, The first sealing cover (8), the second sealing cover (9), the first graphite sealing ring (10) and the second graphite sealing ring (11) are connected to the first support plate (1), the second support plate (2), the first bearing (12) and the second bearing (13) in the same way.
7. The converter tilting trunnion seal and automatic slag discharge device according to claim 6, characterized in that, The first bearing (12) includes a second outer race (1202) fixedly connected to the first trunnion (3), a first outer race (1201) is mounted on the outside of the second outer race (1202), and a cylindrical roller (1203) is mounted between the first outer race (1201) and the second outer race (1202).
8. The converter tilting trunnion seal and automatic slag discharge device according to claim 7, characterized in that, The cylindrical rollers (1203) are distributed at equal angles between the first outer bearing (1201) and the second outer bearing (1202), and the first outer bearing (1201) is fixedly connected to the first support plate (1).
9. The converter tilting trunnion seal and automatic slag discharge device according to claim 8, characterized in that, A cavity is formed between the first outer seat ring (1201), the second outer seat ring (1202), the first sealing cover (8), the second sealing cover (9), the first graphite sealing ring (10), and the second graphite sealing ring (11) that communicates with the second connecting pipe (1405) and the third connecting pipe (16).
10. The converter tilting trunnion seal and automatic slag discharge device according to claim 9, characterized in that, The bottom of the second connecting pipe (1405) is in communication with the inside of the second sealing cap (9), and the bottom of the third connecting pipe (16) is in communication with the inside of the first sealing cap (8).