A hydraulic lifting device for electromagnetic stirring of a furnace bottom

Abstract

This utility model discloses a hydraulic lifting device for electromagnetic stirring at the bottom of a furnace, including a scissor frame, an installation and adjustment mechanism, a position locking mechanism, and a locking auxiliary mechanism. The installation and adjustment mechanism includes an installation plate and a top plate. The position locking mechanism includes a bottom fixing pipe and a locking rod. The locking auxiliary mechanism includes an outer rotating sleeve and a counterweight block. Through the directional sliding design of the installation plate on the top plate, combined with multiple sets of adjustment holes on the support platform, the problem of inconvenient adjustment of the installation plate position in traditional devices is solved. The cooperation between the slide rail and the bottom of the installation plate ensures the smooth and controllable sliding process, greatly improving the adjustment accuracy. Through the cooperation of the bottom fixing pipe, locking pipe, and locking rod, combined with the design of the inner wall block, rotating block, and counterweight spring, the problem of cumbersome fixing and disassembly of traditional devices is solved. This rotating sleeve connection replaces the traditional multi-point bolt fixing or complex buckle, and the connection and disassembly can be completed quickly without special tools.

Description

Technical Field

[0001] This utility model relates to the field of lifting technology, and more specifically, it relates to a hydraulic lifting device for electromagnetic stirring at the bottom of a furnace. Background Technology

[0002] In the existing technical field, there are two key technical defects in hydraulic lifting devices used for electromagnetic stirring at the bottom of the furnace that urgently need to be solved, which seriously affect the practicality, operating efficiency and safety of the equipment.

[0003] Firstly, the design of the mounting plate position adjustment in traditional furnace bottom electromagnetic stirring hydraulic lifting devices has significant shortcomings. Most existing devices use fixed connections or simple sliding structures, which cannot achieve precise adjustment of the mounting plate position. In practical applications, due to the complex and variable structure of the furnace bottom, the electromagnetic stirrer needs frequent and precise position adjustments according to different furnace types and process requirements. The lack of adjustment function prevents the stirrer from accurately positioning itself to the optimal working position.

[0004] Secondly, the fixing and disassembly processes of traditional devices before and after adjustment are extremely cumbersome and complex. Existing technologies mostly use multi-point bolt fixing, complex clips, or heavy-duty pin locking to fix the position of the adjusted mounting plate. These fixing methods usually require the use of various specialized tools, and operators have to perform tightening or disassembly operations for a long time in harsh environments with high temperatures and high noise. Especially in the continuous production environment of metallurgical enterprises, equipment needs to be frequently adjusted according to the production needs of different batches. The cumbersome fixing and disassembly process not only significantly reduces production efficiency but also increases the labor intensity and safety risks of operators. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a hydraulic lifting device for electromagnetic stirring at the bottom of a furnace, thereby solving the technical problems mentioned in the background art, such as the inconvenience of adjusting the position of the mounting plate and the cumbersome fixing and disassembly before and after adjustment.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic lifting device for electromagnetic stirring at the bottom of a furnace, comprising a scissor frame, an installation and adjustment mechanism, a position locking mechanism, and a locking auxiliary mechanism. The installation and adjustment mechanism includes an installation plate and a top plate. The top plate is fitted onto the top end of the scissor frame, and a support platform is installed on the top end of the top plate. The installation plate is directionally slidably mounted on the top plate. The support platform has multiple sets of adjustment holes. The position locking mechanism includes a bottom fixing tube and a locking rod. A fixing plate is installed on the side of the installation plate, and the bottom fixing tube is fixedly mounted on the fixing plate. A locking tube is rotatably mounted on the top end of the bottom fixing tube. The locking rod extends directionally into the bottom fixing tube through different adjustment holes, connecting the fixing plate to the support platform. An inner wall block is installed on the inner wall of the locking tube, and a rotating block is installed on the outer wall of the locking rod. The inner wall block can fit the rotating block. A counter-pressure spring is installed on the inner wall block, which can press against the rotating block, so that the inner wall block and the rotating block are relatively fixed.

[0009] The present invention is further configured such that the snap-fit ​​auxiliary mechanism includes an outer rotating sleeve and a pair of shrink blocks. The outer rotating sleeve is fixedly installed at the bottom end of the outer wall of the snap-fit ​​tube. An outer fixing ring is installed on the outer wall of the bottom fixing tube. A pair of shrink blocks is slidably installed at the top end of the outer fixing ring, and multiple sets of shrink blocks are arranged in pairs. A shrink spring is installed between the pairs of shrink blocks. A bottom ball block is installed at the bottom end of the outer rotating sleeve, and multiple sets of bottom ball blocks are arranged. The bottom ball blocks pass through the pairs of shrink blocks in sequence, so that the outer rotating sleeve stably drives the snap-fit ​​tube to rotate.

[0010] The present invention is further configured such that a base frame is installed at the bottom end of the scissor frame, and bottom wheels are installed around the bottom end of the base frame. The base frame provides a stable foundation support, and the bottom wheel design makes the entire device mobile, which facilitates quick adjustment between different furnace bottom positions, thereby improving the flexibility and efficiency of the equipment.

[0011] The present invention is further configured such that a slide rail is installed at the top end of the top plate, and the bottom end of the mounting plate is oriented and slidably configured in conjunction with the slide rail. The slide rail is installed at the top of the top plate and cooperates with the bottom of the mounting plate to ensure that the mounting plate slides smoothly and controllably, thereby improving the adjustment accuracy.

[0012] The present invention is further configured such that a limiting block is installed on one side of the top end of the top plate, and one end of the fixing plate can contact the limiting block, and an external furnace bottom electromagnetic stirring device is installed on the top end of the mounting plate.

[0013] The present invention is further configured such that a centripetal rail is installed at the top end of the outer fixed ring, and the shrink block is configured to slide centripetally on the centripetal rail. The centripetal rail is installed at the top of the outer fixed ring to guide the centripetal sliding of the shrink block and ensure that the movement direction is precise and controllable.

[0014] The present invention is further configured such that an inner retaining ring is installed on the inner wall of the bottom retaining tube, and an ejection spring is installed on the outer wall of the snap-fit ​​rod, with one end of the ejection spring contacting one end face of the inner retaining ring. The inner retaining ring and the ejection spring work together to provide an automatic pop-out function, simplifying the disassembly process and improving the convenience of maintenance.

[0015] The present invention is further configured such that a hydraulic cylinder is rotatably mounted on the scissor frame, and one end of the hydraulic cylinder is rotatably connected to the base frame. The hydraulic cylinder provides a stable and controllable power source through its rotatable connection with the scissor frame and the base frame, thereby achieving precise height adjustment.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a hydraulic lifting device for electromagnetic stirring at the bottom of a furnace, which has the following advantages:

[0018] This utility model is equipped with an installation and adjustment mechanism. Through the directional sliding design of the mounting plate on the top plate, and with the multiple sets of adjustment holes on the support platform, it solves the problem of inconvenient adjustment of the mounting plate position in traditional devices. The cooperation between the slide rail and the bottom of the mounting plate ensures that the sliding process is stable and controllable, greatly improving the adjustment accuracy. This multi-dimensional adjustment design enables the electromagnetic stirring device to be precisely positioned according to different furnace types and process requirements, improving stirring efficiency and smelting quality stability.

[0019] This utility model is equipped with a position locking mechanism. Through the cooperation of the bottom fixing tube, locking tube and locking rod, combined with the design of the inner wall block, rotating block and pressure spring, it solves the problem of cumbersome fixing and disassembly of traditional devices. This rotating sleeve connection replaces the traditional multi-point bolt fixing or complex buckle, and can quickly complete the connection and disassembly without special tools, improving the convenience and safety of equipment maintenance.

[0020] This utility model is equipped with a locking auxiliary mechanism. Through the cooperation of the outer rotating sleeve, the counterweight block, the counterweight spring, and the bottom ball block, an additional locking guarantee is provided for the position locking mechanism. The bottom ball block passes through the pairs of counterweight blocks in sequence to form a ratchet-like locking effect, ensuring that the outer rotating sleeve can stably drive the locking tube to rotate, effectively preventing accidental loosening in high-intensity vibration environments. The centripetal rail guides the precise movement of the counterweight block, and the counterweight spring provides reliable return force. Together, they constitute a safe and reliable double locking system, which significantly improves the stability and safety of the equipment under harsh working conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model;

[0022] Figure 2 This is a schematic diagram of the device from the bottom view of this utility model;

[0023] Figure 3 This is a structural schematic diagram of the mounting plate fixing method in this utility model;

[0024] Figure 4 This is a schematic diagram of the position locking mechanism and locking auxiliary mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the position locking mechanism and the locking auxiliary mechanism in this utility model.

[0026] In the diagram: 1. Scissor frame; 2. Mounting plate; 3. Top plate; 4. Support platform; 5. Adjustment hole; 6. Bottom fixing pipe; 7. Clip rod; 8. Fixing plate; 9. Clip pipe; 10. Inner wall block; 11. Rotating block; 12. Compression spring; 13. Outer rotating sleeve; 14. Retraction block; 15. Outer fixing ring; 16. Bottom ball block; 17. Base frame; 18. Bottom wheel; 19. Slide rail; 20. Limiting block; 21. Centripetal rail; 22. Inner fixing ring; 23. Push-out spring; 24. Hydraulic cylinder; 201. Retraction spring. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5A hydraulic lifting device for electromagnetic stirring at the bottom of a furnace includes a scissor frame 1, an installation and adjustment mechanism, a position locking mechanism, and a locking auxiliary mechanism. The installation and adjustment mechanism includes a mounting plate 2 and a top plate 3. The top plate 3 is fitted onto the top end of the scissor frame 1. A support platform 4 is mounted on the top end of the top plate 3. The mounting plate 2 is directionally slidable on the top plate 3. The support platform 4 has adjustment holes 5, and multiple sets of adjustment holes 5 are provided. The position locking mechanism includes a bottom fixing tube 6 and a locking rod 7. A fixing plate is mounted on the side of the mounting plate 2. 8. The bottom fixed tube 6 is fixedly installed on the fixed plate 8. The top end of the bottom fixed tube 6 is rotatably fixed with a clamping tube 9. The clamping rod 7 extends into the bottom fixed tube 6 through different adjustment holes 5 to connect the fixed plate 8 and the support platform 4. The inner wall of the clamping tube 9 is equipped with an inner wall block 10. The outer wall of the clamping rod 7 is equipped with a rotating block 11. The inner wall block 10 can fit the rotating block 11. The inner wall block 10 is equipped with a pressure spring 12. The pressure spring 12 can press against the rotating block 11 to fix the inner wall block 10 and the rotating block 11 relatively.

[0031] In this embodiment, the installation adjustment mechanism achieves precise adjustment of the device position through the cooperation of the mounting plate 2, the top plate 3, and the support platform 4. During use, the mounting plate 2 can slide directionally on the slide rail 19 on the top plate 3 to adjust the horizontal position of the furnace bottom electromagnetic stirring device. The multiple sets of adjustment holes 5 on the support platform 4 provide different connection options, allowing the mounting plate 2 to be fixed in a suitable position. The design of the limiting block 20 and the fixed plate 8 prevents the mounting plate 2 from sliding beyond the safe range, ensuring the stability and safety of the adjustment process. The position locking mechanism achieves the connection and fixation between the mounting plate 2 and the support platform 4 through the cooperation of the bottom fixing tube 6, the locking tube 9, and the locking rod 7. During operation, the locking rod 7 is passed through the selected adjustment hole 5 on the support platform 4 and then inserted into the bottom fixing tube 6 on the fixed plate 8. The locking tube 9 is rotated so that the inner wall block 10 fits into the rotating block 11 on the locking rod 7. The compression spring 12 applies lateral pressure to the rotating block 11 to ensure a firm connection, allowing the device to be quickly and securely locked at different heights and positions without the need for complex tools.

[0032] The snap-fit ​​auxiliary mechanism includes an outer rotating sleeve 13 and a pair of shrink blocks 14. The outer rotating sleeve 13 is fixedly installed at the bottom end of the outer wall of the snap-fit ​​tube 9. An outer fixing ring 15 is installed on the outer wall of the bottom fixing tube 6. A pair of shrink blocks 14 are slidably installed at the top end of the outer fixing ring 15, and multiple sets of shrink blocks 14 are arranged in pairs. A shrink spring 201 is installed between the pairs of shrink blocks 14. A bottom ball block 16 is installed at the bottom end of the outer rotating sleeve 13, and multiple sets of bottom ball blocks 16 are arranged. The bottom ball blocks 16 pass through the pairs of shrink blocks 14 in sequence, so that the outer rotating sleeve 13 stably drives the snap-fit ​​tube 9 to rotate.

[0033] In this embodiment, the locking auxiliary mechanism enhances the stability and ease of operation of the locking mechanism through the cooperation of the outer rotating sleeve 13, the counterweight 14, and the bottom ball block 16. During operation, the outer rotating sleeve 13 is rotated, and the bottom ball block 16 passes through the paired counterweight 14 in sequence, forming a ratchet-like locking effect, ensuring that the outer rotating sleeve 13 can stably drive the locking tube 9 to rotate, preventing accidental loosening in a vibration environment. When disassembly is required, the outer rotating sleeve 13 is rotated in the opposite direction to release the locking mechanism. The locking rod 7 is partially ejected under the action of the push-out spring 23, making it easy to remove.

[0034] Please see Figures 1-5 As a supplementary embodiment of a hydraulic lifting device for electromagnetic stirring at the bottom of a furnace, which includes an installation adjustment mechanism, a position locking mechanism, and a locking auxiliary mechanism: A base frame 17 is installed at the bottom end of the scissor frame 1, and bottom wheels 18 are installed around the bottom end of the base frame 17. A slide rail 19 is installed at the top end of the top plate 3, and the bottom end of the mounting plate 2 is oriented and slidably set with the slide rail 19. A limiting block 20 is installed on one side of the top end of the top plate 3, and one end of the fixing plate 8 can contact the limiting block 20. An external electromagnetic stirring device for the bottom of the furnace is installed at the top end of the mounting plate 2. A centripetal rail 21 is installed at the top end of the outer fixed ring 15, and the shrinking block 14 is oriented and slidably set on the centripetal rail 21. An inner fixed ring 22 is installed on the inner wall of the bottom fixed tube 6. A push-out spring 23 is installed on the outer wall of the locking rod 7, and one end of the push-out spring 23 is in contact with one end face of the inner fixed ring 22. A hydraulic cylinder 24 is rotatably installed on the scissor frame 1, and one end of the hydraulic cylinder 24 is rotatably connected to the base frame 17.

[0035] More specifically, the base frame 17 is moved to the required position for the electromagnetic stirring at the bottom of the furnace via the bottom wheels 18. The hydraulic cylinder 24 is operated to unfold the scissor frame 1, raising the top plate 3 to a suitable height. The mounting plate 2 is slid on the top plate 3 to adjust the horizontal position of the electromagnetic stirring device. The mounting plate 2 is secured by the limiting block 20 and the fixing plate 8 to ensure that the mounting plate 2 does not slip out of the safe range. A suitable adjustment hole 5 is selected on the support platform 4, and the locking rod 7 is inserted into the bottom fixed pipe 6 through the adjustment hole 5. The locking pipe 9 is rotated so that the inner wall block 10 fits into the rotating block 11 on the locking rod 7, achieving initial fixation. The compression spring 12 is pressed against the rotating block 11 to increase the stability. With strong connection stability, rotating the outer rotating sleeve 13 allows the bottom ball block 16 to pass between the shrinking blocks 14, forming an additional lock. This ensures that the outer rotating sleeve 13 stably drives the clamping pipe 9, preventing vibration from causing loosening. The electromagnetic stirring device is installed on the top of the mounting plate 2 and begins the furnace bottom stirring operation. The device remains in a stable locked state and withstands working vibration. Reverse rotation of the outer rotating sleeve 13 releases the lock of the clamping auxiliary mechanism. Reverse rotation of the clamping pipe 9 releases the clamping rod 7. The clamping rod 7 partially pops out under the action of the push-out spring 23. The clamping rod 7 can be removed, and the position of the mounting plate 2 can be readjusted or the scissor frame 1 can be lowered.

[0036] In summary, during the use or operation of the overall equipment: when the adjustment mechanism needs to be installed, the adjustment mechanism achieves precise adjustment of the device position through the cooperation of the mounting plate 2, the top plate 3, and the support platform 4. During use, the mounting plate 2 can slide directionally on the slide rail 19 on the top plate 3, thereby adjusting the horizontal position of the electromagnetic stirring device at the bottom of the furnace. The multiple sets of adjustment holes 5 opened on the support platform 4 provide different connection options, allowing the mounting plate 2 to be fixed in a suitable position. The design of the limiting block 20 and the fixing plate 8 prevents the mounting plate 2 from sliding beyond the safe range, ensuring the stability and safety of the adjustment process.

[0037] When the position locking mechanism is in operation, it connects and fixes the mounting plate 2 and the support platform 4 through the cooperation of the bottom fixing tube 6, the locking tube 9 and the locking rod 7. During operation, the locking rod 7 is passed through the selected adjustment hole 5 on the support platform 4 and then inserted into the bottom fixing tube 6 on the fixing plate 8. The locking tube 9 is rotated so that the inner wall block 10 fits into the rotating block 11 on the locking rod 7. The compression spring 12 applies lateral pressure to the rotating block 11 to ensure a firm connection. This allows the device to be quickly and securely locked at different heights and positions without the need for complicated tools.

[0038] When the locking auxiliary mechanism is in operation, the locking auxiliary mechanism enhances the stability and ease of operation of the locking by cooperating with the outer rotating sleeve 13, the counterweight 14 and the bottom ball block 16. During operation, the outer rotating sleeve 13 is rotated, and the bottom ball block 16 passes through the paired counterweight 14 in sequence, forming a ratchet-like locking effect, ensuring that the outer rotating sleeve 13 can stably drive the locking tube 9 to rotate, preventing accidental loosening in a vibration environment. When disassembly is required, the outer rotating sleeve 13 is rotated in the opposite direction to release the locking. The locking rod 7 is partially ejected under the action of the push-out spring 23, making it easy to remove.

[0039] Move the base frame 17 to the desired position for the electromagnetic stirring at the bottom of the furnace via the bottom wheels 18. Operate the hydraulic cylinder 24 to unfold the scissor frame 1 and raise the top plate 3 to a suitable height. Slide the mounting plate 2 on the top plate 3 to adjust the horizontal position of the electromagnetic stirring device. Ensure that the mounting plate 2 will not slip out of the safe range using the limiting block 20 and the fixing plate 8. Select a suitable adjustment hole 5 on the support platform 4 and insert the locking rod 7 through the adjustment hole 5 into the bottom fixed pipe 6. Rotate the locking pipe 9 so that the inner wall block 10 fits into the rotating block 11 on the locking rod 7, achieving initial fixation. Press the compression spring 12 against the rotating block 11 to enhance the connection. To ensure stability, rotate the outer rotating sleeve 13 so that the bottom ball block 16 passes between the shrinking blocks 14, forming an additional lock. This ensures that the outer rotating sleeve 13 stably drives the clamping pipe 9, preventing vibration from causing loosening. The electromagnetic stirring device is installed on the top of the mounting plate 2 and begins the furnace bottom stirring operation. The device remains in a stable locked state and withstands working vibration. Rotate the outer rotating sleeve 13 in the opposite direction to release the lock of the clamping auxiliary mechanism. Rotate the clamping pipe 9 in the opposite direction to release the clamping rod 7. The clamping rod 7 partially pops out under the action of the push-out spring 23. Remove the clamping rod 7, and the position of the mounting plate 2 can be readjusted or the scissor frame 1 can be lowered.

[0040] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0041] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise explicitly described, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be elaborated here. In all the solutions mentioned above, those involving motors can be used with a reducer if necessary. The connection structure and working principle between the motor and the reducer are existing, well-known technologies, and will not be elaborated here.

Claims

1. A hydraulic lifting device for electromagnetic stirring at the bottom of a furnace, comprising a scissor frame (1), an installation and adjustment mechanism, a position locking mechanism, and a locking auxiliary mechanism, characterized in that: The installation and adjustment mechanism includes a mounting plate (2) and a top plate (3). The top plate (3) is fitted onto the top end of the scissor frame (1). A support platform (4) is installed on the top end of the top plate (3). The mounting plate (2) is directionally slidably mounted on the top plate (3). An adjustment hole (5) is provided on the support platform (4), and multiple sets of adjustment holes (5) are provided. The position locking mechanism includes a bottom fixing tube (6) and a locking rod (7). A fixing plate (8) is installed on the side of the mounting plate (2). The bottom fixing tube (6) is fixedly mounted on the fixing plate (8). On the fixed plate (8), the top end of the bottom fixed tube (6) is equipped with a retaining pipe (9) for rotational positioning, which connects the fixed plate (8) to the support platform (4). The inner wall of the retaining pipe (9) is equipped with an inner wall block (10), and the outer wall of the retaining rod (7) is equipped with a rotating block (11). The inner wall block (10) can fit the rotating block (11). The inner wall block (10) is equipped with a pressure spring (12), which can press against the rotating block (11) to fix the inner wall block (10) and the rotating block (11) relative to each other.

2. The hydraulic lifting device for electromagnetic stirring of a furnace bottom according to claim 1, characterized by: The snap-fit ​​auxiliary mechanism includes an outer rotating sleeve (13) and a pair of shrink blocks (14). The outer rotating sleeve (13) is fixedly installed at the bottom end of the outer wall of the snap-fit ​​tube (9). An outer fixing ring (15) is installed on the outer wall of the bottom fixing tube (6). A pair of shrink blocks (14) is slidably installed at the top end of the outer fixing ring (15). Multiple sets of shrink blocks (14) are set in pairs. A shrink spring (201) is installed between the pairs of shrink blocks (14). A bottom ball block (16) is installed at the bottom end of the outer rotating sleeve (13). Multiple sets of bottom ball blocks (16) are set. The bottom ball blocks (16) pass through the pairs of shrink blocks (14) in sequence, so that the outer rotating sleeve (13) stably drives the snap-fit ​​tube (9) to rotate.

3. The hydraulic lifting device for electromagnetic stirring of a furnace bottom according to claim 1, characterized in that: The bottom end of the scissor frame (1) is provided with a base frame (17), and the bottom end of the base frame (17) is provided with bottom wheels (18) around its bottom.

4. The hydraulic lifting device for electromagnetic stirring of a furnace bottom according to claim 1, characterized by: The top end of the top plate (3) is equipped with a slide rail (19), and the bottom end of the mounting plate (2) is oriented and slidably set in cooperation with the slide rail (19).

5. A hydraulic lifting device for electromagnetic stirring at the bottom of a furnace according to claim 1, characterized in that: A limiting block (20) is installed on one side of the top end of the top plate (3), and one end of the fixing plate (8) can contact the limiting block (20), and the external furnace bottom electromagnetic stirring device is installed on the top end of the mounting plate (2).

6. The hydraulic lifting device for electromagnetic stirring of a furnace bottom according to claim 2, characterized by: The top end of the outer fixed ring (15) is provided with a centripetal rail (21), and the shrink block (14) is set to slide centripetally on the centripetal rail (21).

7. The hydraulic lifting device for electromagnetic stirring of a furnace bottom according to claim 1, characterized by: An inner retaining ring (22) is installed on the inner wall of the bottom retaining tube (6), and a push-out spring (23) is installed on the outer wall of the snap-fit ​​rod (7), with one end of the push-out spring (23) in contact with one end face of the inner retaining ring (22).

8. The hydraulic lifting device for electromagnetic stirring of a furnace bottom according to claim 3, characterized by: A hydraulic cylinder (24) is rotatably mounted on the scissor frame (1), and one end of the hydraulic cylinder (24) is rotatably connected to the base frame (17).

Images