A refining furnace cover that is easy to disassemble
By designing reserved holes, cooling water pipes, flips and snap-on components on the refining furnace cover, the problems of inconvenient removal and unstable connection of the traditional furnace cover are solved, and convenient positioning and disassembly of the furnace cover is achieved, improving operational safety and process simplicity.
Patent Information
- Application Number
- CN202421409179.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The disassembly of traditional refining furnace covers is inconvenient and the lack of stable installation components, which leads to unstable connection between the furnace cover and the refining furnace body, poses safety risks, and the disassembly process is cumbersome.
A furnace cover including reserved holes, cooling water pipes, flanges and snapping components is designed. Through the cooperation of the hanging ring and snapping components, the furnace cover is conveniently positioned and removed. The snap assembly includes an upper snap and a lower snap. Through the coordination of the adjusting parts and the clip, the stable connection between the upper snap and the lower snap is ensured.
It realizes convenient positioning and disassembly of the furnace cover, improves the stability of the connection between the furnace cover and the refining furnace body, reduces safety risks, and simplifies the operation process.
Smart Images

Figure CN222718668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to refining equipment, in particular to a refining furnace cover which is easy to disassemble. Background Art
[0002] A refining furnace is a type of smelting equipment in the hot working industry, primarily used for final deoxidation and alloying of molten steel in ferrous metallurgy. It is categorized by argon-blown refining furnaces and LF refining furnaces, depending on the smelting purpose. Traditional furnace covers are installed by hooking them for movement and installation. This not only requires skilled operators, but also can cause slippage during hooking, leading to cover fall-off. Without skilled operators, removal of the cover is inconvenient.
[0003] China Patent Authorization Announcement No.: CN220246180U, authorization announcement date May 11, 2023, discloses a ladle refining furnace cover, including a cover body, a cleaning part and a driving part. The interior of the cover body is hollow, and an opening is provided at the lower end. The cleaning part is arranged in the cover body and abuts against the inner top wall of the cover body. The cleaning part can move along the radial direction of the cover body so that the cleaning part can abut against the inner side wall of the cover body. The driving part is arranged at the top of the cover body, and the driving part is connected to the cleaning part, and can drive the cleaning part to rotate around the axis of the cover body. The shortcoming of this utility model is that there is a lack of installation components, and the stability of the connection between the furnace cover and the refining furnace body cannot be guaranteed during the use of the refining furnace, which is prone to safety accidents, and the lack of disassembly components makes installation and disassembly more troublesome. Utility Model Content
[0004] The utility model aims to overcome the shortcomings of the prior art such as inconvenient disassembly and troublesome positioning, and provides a refining furnace cover which is easy to position, install and disassemble and is convenient to disassemble.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A refining furnace cover that is easy to disassemble includes a furnace cover, three reserved holes are provided in the middle of the furnace cover, a number of cooling water pipes are evenly installed on the surface of the furnace cover, a number of flanges are provided on the furnace cover, the flanges are evenly distributed at the outer edge of the furnace cover, hanging rings are installed on the upper end surfaces of the flanges, and a snap assembly is installed on the flanges, the snap assembly includes an upper snap and a lower snap, the upper end of the upper snap is connected to the outer side surface of the flange, and the lower end of the upper snap is detachably connected to the upper end of the lower snap.
[0007] First, the furnace cover is transported to the top of the refining furnace through the hanging ring at the edge of the top surface of the furnace cover, and the lower clip is connected to the outer wall of the refining furnace. After aligning the upper clip and the lower clip, the upper clip and the lower clip are connected, and then the cooling water pipe on the surface of the furnace cover is opened, and the aluminum thermite rod is inserted into the refining furnace through the reserved hole to start the refining operation. After completion, the aluminum thermite rod is taken out, the upper clip and the lower clip are loosened, and the furnace cover is transported away from the refining furnace through the hanging ring at the edge of the top surface of the furnace cover, thereby achieving the purpose of convenient positioning and loading and unloading of the furnace cover.
[0008] Preferably, the structure of the upper buckle is consistent with that of the lower buckle, and both the upper buckle and the lower buckle include a U-shaped block, a straight rod, an adjusting piece and a clamping piece. One end of the straight rod is connected to the outer side surface of the bottom of the U-shaped block, a groove is provided on the inner side of the bottom of the U-shaped block, a through hole is provided at the bottom of the U-shaped block, the through hole runs through the front and rear sides of the U-shaped block, the through hole is connected to the groove, round rods are installed at both ends of the adjusting piece, the adjusting piece is detachably installed in the through hole, the middle of the adjusting piece is disposed in the groove, and the middle of the adjusting piece is disposed in the groove. A groove two is provided, and the groove two is placed in the groove one. The cross-section of the clamp is U-shaped, and one end of the clamp opening is placed in the groove one. The thickness of the end of the clamp placed in the groove one is less than the thickness of the rest of the clamp and less than the width of the groove two. A rotating shaft one is provided at the bottom of the clamp, and a through hole two is provided at one end of the U-shaped block. The rotating shaft one is placed in the through hole two. The clamp is rotatably connected to the U-shaped block through the cooperation of the rotating shaft one and the through hole two. A card slot is provided at the end of the clamp placed in the groove one, and the card slot is detachably connected to the groove two. The upper buckle and the lower buckle are connected in that the clamping piece of the upper buckle and the clamping piece of the lower buckle form a central symmetry, and the adjusting key is moved inward by pushing the round rod at one end of the adjusting key inward, so that the clamping groove on the end of the clamping piece placed in the groove one is engaged with the groove two on the adjusting key, so that the clamping piece cannot be rotated by the rotating shaft one, so that the upper buckle and the lower buckle are tightly connected. When it needs to be loosened, the round rod at the other end of the adjusting piece is pulled outward, and the clamping groove is separated from the groove two. The clamping piece of the upper buckle and the clamping piece of the lower buckle can both be rotated along the rotating shaft one, so that the upper buckle and the lower buckle can be separated, thereby achieving the purpose of easy disassembly and installation.
[0009] Preferably, one end of the adjusting member is provided with a flange 2, a flange 3 is provided between the flange 2 and the groove 2, a groove 3 is provided between the flange 3 and the flange 2, the groove 3 is positioned in the through hole 1, the flange 2 and the groove 3 are detachably connected, and the flange 3 and the groove 3 are detachably connected. The position of the adjusting member is adjusted by a round rod. When the round rod is pulled outward to separate the slot from the groove 2, the flange 2 is connected to the groove 3. When the round rod is pushed inward to contact the slot with the groove 2, the flange 3 is connected to the groove 3. This makes the adjusting member less likely to disengage, thereby improving the stability of the connection between the upper and lower buckles.
[0010] Preferably, a frame is provided above the furnace cover, with four legs mounted on the lower end surface of the frame, and a plurality of cylinders mounted on the upper end surface of the frame. A movable rod is provided at the lower end of the cylinder, which passes through the upper end of the frame, and a hook corresponding to a hanging ring is mounted at the lower end of the movable rod. The frame is connected to the furnace cover through the cooperation of the hook and the hanging ring. When the furnace cover reaches the corresponding position of the refining furnace, the movable rod is driven by the cylinder on the frame to move, and the hanging ring is hooked by the hook. Compared with the prior art of lifting the furnace cover by a chain, the cylinder and movable rod drive is more stable, achieving the purpose of automatically and stably raising and lowering the furnace cover.
[0011] Preferably, a fixed caster is provided below the foot. The fixed caster comprises a mounting base, a roller, and a second rotating shaft. One end of the mounting base is connected to the foot on the frame, and the other end of the mounting base is provided with a fifth groove. Three through holes are provided on the left and right sides of the fifth groove. The second rotating shaft is mounted in the middle of the roller and positioned in the third through hole. The roller is rotatably connected to the mounting base through the engagement of the second rotating shaft and the third through hole. The fixed caster at the foot enables the frame to move forward and backward, and the movable frame drives the furnace cover to move to the location of the refining furnace, allowing the furnace cover to adapt to refining furnaces that cannot be moved due to fixed equipment.
[0012] Preferably, an annular guide groove is provided on the upper end surface of the furnace cover, and the longitudinal cross-section of the annular guide groove is T-shaped. A buckle assembly is provided above the furnace cover, and the buckle assembly includes a circular ring, and a plurality of guide rods are installed on the circular ring, and the guide rods are evenly distributed at the inner edge of the lower end of the circular ring. One end of the guide rod is placed in the annular guide groove, and the longitudinal cross-section of one end of the annular guide rod placed in the annular guide groove is T-shaped. The circular ring is slidingly connected to the furnace cover through the cooperation of the guide rod and the annular guide groove, and a plurality of connecting rods are installed on the circular ring, and the connecting rods are evenly distributed at the outer edge of the circular ring. The connecting rod is placed between two buckle assemblies, and a push rod is installed at the bottom end of the connecting rod, and the push rod is tilted. The position of the push rod corresponds to the position of the circular rod on the upper buckle and the position of the circular rod on the lower buckle. The connecting rod is rotated by rotating the circular ring above the furnace cover. Since the cross-section of the annular guide groove and one end of the guide rod are both T-shaped, the cooperation of the guide rod and the guide groove enables the ring to rotate stably in the annular guide groove without derailing. When the circular ring rotates clockwise, the push rod on the connecting rod pushes the round rod on the adjusting part, the adjusting part retracts, and the upper clamp and the lower clamp are locked. The circular ring push rod is rotated counterclockwise to push the round rod on the other side of the adjusting part, and the adjusting part rises. The upper clamp and the lower clamp are detachable, thereby achieving the purpose of facilitating the adjustment of the snap assembly switch.
[0013] Preferably, a dust removal hole is provided on the upper end surface of the furnace cover, and a dust removal pipe is mounted on the upper end surface of the furnace cover, one end of the dust removal pipe being connected to the dust removal hole. The dust removal pipe can be connected to dust removal equipment in the prior art to effectively remove dust impurities generated during the refining process, thereby improving the quality of the refined product.
[0014] The beneficial effects of the utility model are: the furnace cover is easy to position and install; it is easy to disassemble and install; the adjusting piece is not easy to fall off, and the connection between the upper buckle and the lower buckle is stable; the furnace cover can be raised and lowered automatically and stably; the fixed casters enable the frame to move back and forth; it is easy to adjust the buckle assembly switch; and the quality of the refined product is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the utility model;
[0016] Figure 2 is a schematic structural diagram of the furnace cover;
[0017] Figure 3 This is an exploded view of the upper and lower buckles;
[0018] Figure 4 It is a structural diagram of the framework;
[0019] Figure 5 It is a structural diagram of fixed casters;
[0020] Figure 6 It is a structural diagram of the buckle assembly;
[0021] Figure 7 It is a structural diagram of the adjustment key and groove four.
[0022] Figure: 1. Furnace cover, 2. Reserved hole, 3. Cooling water pipe, 4. Flanged edge 1, 5. Hanging ring, 6. Upper buckle, 7. Lower buckle, 8. U-shaped block, 9. Straight rod, 10. Adjustment piece, 11. Clamp, 12. Groove 1, 13. Through hole 1, 14. Round rod, 15. Groove 2, 16. Rotating shaft 1, 17. Through hole 2, 18. Clamping slot, 19. Flanged edge 3, 20. Flanged edge 2, 21. Groove 3, 22. Frame, 23. Leg, 24. Cylinder, 25. Movable rod, 26. Hook, 27. Fixed caster, 28. Mounting base, 29. Roller, 30. Rotating shaft 2, 31. Groove 5, 32. Through hole 3, 33. Annular guide groove, 34. Ring, 35. Guide rod, 36. Connecting rod, 37. Push rod, 38. Dust removal pipe. DETAILED DESCRIPTION
[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0024] like Figure 1 and Figure 2 In the described embodiment, it includes a furnace cover 1, three reserved holes 2 are provided in the middle of the furnace cover 1, a number of cooling water pipes 3 are evenly installed on the surface of the furnace cover 1, a number of flanges 4 are provided on the furnace cover 1, the flanges 4 are evenly distributed at the outer edge of the furnace cover 1, a hanging ring 5 is installed on the upper end surface of the flange 4, and a buckle assembly is installed on the flange 4, the buckle assembly includes an upper buckle 6 and a lower buckle 7, the upper end of the upper buckle 6 is connected to the outer side surface of the flange 4, and the lower end of the upper buckle 6 is detachably connected to the upper end of the lower buckle 7.
[0025] like Figure 2 and Figure 3 As shown, the structure of the upper buckle 6 is consistent with that of the lower buckle 7. Both the upper buckle 6 and the lower buckle 7 include a U-shaped block 8, a straight rod 9, an adjusting member 10 and a clamping member 11. One end of the straight rod 9 is connected to the outer side of the bottom of the U-shaped block 8. A groove 12 is provided on the inner side of the bottom of the U-shaped block 8. A through hole 13 is provided at the bottom of the U-shaped block 8. The through hole 13 runs through the front and rear sides of the U-shaped block 8. The through hole 13 is connected to the groove 12. Round rods 14 are installed at both ends of the adjusting member 10. The adjusting member 10 is detachably installed in the through hole 13. The middle of the adjusting member 10 is disposed in the groove 12. The middle of the adjusting member 10 is provided with a groove 2 15, groove two 15 is placed in groove one 12, the cross-section of the clip 11 is U-shaped, the open end of the clip 11 is placed in groove one 12, the thickness of the end of the clip 11 placed in groove one 12 is less than the thickness of the rest of the clip 11 and less than the width of groove two 15, a rotating shaft 16 is provided at the bottom of the clip 11, a through hole two 17 is provided at one end of the U-shaped block 8, the rotating shaft 16 is placed in the through hole two 17, the clip 11 is rotatably connected to the U-shaped block 8 through the cooperation of the rotating shaft 16 and the through hole two 17, a card slot 18 is provided at the end of the card 11 placed in groove one 12, and the card slot 18 is detachably connected to the groove two 15.
[0026] like Figure 7 As shown, one end of the adjusting member 10 is provided with a flange 20, a flange 3 19 is provided between the flange 20 and the groove 2 15, a groove 3 21 is provided between the flange 3 19 and the flange 20, and the groove 3 21 is placed in the through hole 13. The flange 20 and the groove 3 21 are detachably connected. The flange 3 20 and the groove 3 21 are detachably connected.
[0027] like Figure 1 and Figure 4 As shown, a frame 22 is provided above the furnace cover 1, four legs 23 are installed on the lower end surface of the frame 22, a number of cylinders 24 are installed on the upper end surface of the frame 22, and a movable rod 25 is provided at the lower end of the cylinder 24. The movable rod 25 passes through the upper end of the frame 22, and a hook 26 corresponding to the hanging ring 5 is installed at the lower end of the movable rod 25. The frame 22 is connected to the furnace cover 1 through the cooperation of the hook 26 and the hanging ring 5.
[0028] like Figure 1 and Figure 6 As shown, a fixed caster 27 is provided below the leg 23, and the fixed caster 27 includes a mounting seat 28, a roller 29 and a second rotating shaft 30. One end of the mounting seat 28 is connected to the leg 23 on the frame 22, and the other end of the mounting seat 28 is provided with a fifth groove 31. The left and right sides of the fifth groove 31 are provided with a third through hole 32. The second rotating shaft 30 is installed in the middle of the roller 29, and the second rotating shaft 30 is placed in the third through hole 32. The roller 29 is rotatably connected to the mounting seat 28 through the cooperation of the second rotating shaft 30 and the third through hole 32.
[0029] like Figure 2 and Figure 5 As shown, an annular guide groove 33 is provided on the upper end surface of the furnace cover 1, and the longitudinal cross-section of the annular guide groove 33 is T-shaped. A buckle assembly is provided above the furnace cover 1, and the buckle assembly includes a circular ring 34, and a plurality of guide rods 35 are installed on the circular ring 34. The guide rods 35 are evenly distributed at the inner edge of the lower end of the circular ring 34, and one end of the guide rod 35 is placed in the annular guide groove 33. The longitudinal cross-section of one end of the annular guide rod 35 is T-shaped, and the circular ring 34 is slidably connected to the furnace cover 1 through the cooperation of the guide rod 35 and the annular guide groove 33. A plurality of connecting rods 36 are installed on the circular ring 34, and the connecting rods 36 are evenly distributed at the outer edge of the circular ring 34. The connecting rod 36 is placed between the two buckle assemblies, and a push rod 37 is installed at the bottom end of the connecting rod 36. The push rod 37 is tilted, and the position of the push rod 37 corresponds to the position of the round rod 14 on the upper buckle 6 and the position of the round rod 14 on the lower buckle 7.
[0030] like Figure 2 As shown, a dust removal hole is provided on the upper end surface of the furnace cover 1 , and a dust removal pipe 38 is installed on the upper end surface of the furnace cover 1 , and one end of the dust removal pipe 38 is connected to the dust removal hole.
[0031] When in use, first hang the hook 26 on the hanging ring 5 on the top surface of the flange 4, then move the frame 22 to the top of the refining furnace through the fixed caster 27, push the movable rod 25 downward through the cylinder 24, and the movable rod 25 drives the furnace cover 1 to move downward through the flange 4 so that the upper clip 6 and the lower clip 7 are connected. The lower end of the lower clip 7 is installed on the refining furnace. During the connection of the clip assembly, the clip 11 of the upper clip 6 is connected to the clip 11 of the lower clip, and the clip 11 rotates along the rotating shaft 16. The two clips 11 are mutually engaged to form a central symmetry. One end of the clip 11 Place it in groove 12, then rotate the ring 14 clockwise, drive the connecting rod 36 to rotate through the ring 14, and the connecting rod 36 drives the push rod 37 to rotate around the center of the furnace cover 1. The push rod 37 rotates around the center of the furnace cover 1, so that the push rod 37 contacts the round rod 14 at one end of the adjusting member 10 and pushes the round rod 14 at one end of the adjusting member 10 inward, so that the adjusting member 10 moves inward, and then the clamping member 11 is placed in the groove 12. The slot on one end is engaged with the groove 2 15, and the flange 2 20 is connected to the groove 3 21, thereby fixing the clamping member 11 so that the clamping member 11 cannot rotate along the rotating shaft 16. When the furnace cover 1 needs to be removed, the ring 14 is rotated counterclockwise so that the push rod 37 pushes the round rod 14 at the other end of the adjusting member 10. The round rod 14 drives the adjusting member 10 to retract, so that the card slot and groove 2 15 on the clamping member 11 are disengaged, and the flange 3 19 is connected with the groove 3 21. Then, the movable rod 252 is retracted by the cylinder 24. Since the card slot and groove 2 15 on the clamping member 11 are disengaged, the connection between the upper buckle 6 and the lower buckle 7 is loosened. Finally, the furnace cover 1 is lifted by the movable rod 252, and the furnace cover 1 is removed from the refining furnace.
Claims
1. A refining furnace cover that is easy to disassemble, characterized in that: The invention comprises a furnace cover (1), wherein three reserved holes (2) are arranged in the middle of the furnace cover (1), a plurality of cooling water pipes (3) are evenly installed on the surface of the furnace cover (1), a plurality of flanges (4) are arranged on the furnace cover (1), the flanges (4) are evenly distributed on the outer edge of the furnace cover (1), a hanging ring (5) is installed on the upper end surface of the flanges (4), a buckle assembly is installed on the flanges (4), the buckle assembly comprises an upper buckle (6) and a lower buckle (7), the upper end of the upper buckle (6) is connected to the outer side surface of the flange (4), and the lower end of the upper buckle (6) is detachably connected to the upper end of the lower buckle (7).
2. The refining furnace cover that is easy to disassemble according to claim 1 is characterized in that: The structure of the upper buckle (6) is consistent with that of the lower buckle (7). Both the upper buckle (6) and the lower buckle (7) comprise a U-shaped block (8), a straight rod (9), an adjusting member (10) and a clamping member (11). One end of the straight rod (9) is connected to the outer side surface of the bottom of the U-shaped block (8). The inner side of the bottom of the U-shaped block (8) is provided with a groove (12). The bottom of the U-shaped block (8) is provided with a through hole (13). The through hole (13) passes through the front and rear sides of the U-shaped block (8). The through hole (13) is connected to the groove (12). Round rods (14) are installed at both ends of the adjusting member (10). The adjusting member (10) is detachably installed in the through hole (13). The middle of the adjusting member (10) is disposed in the groove (12). The middle of the adjusting member (10) is provided with a groove (2). 15), the second groove (15) is placed in the first groove (12), the cross-section of the clamp (11) is U-shaped, the open end of the clamp (11) is placed in the first groove (12), the thickness of the end of the clamp (11) placed in the first groove (12) is less than the thickness of the rest of the clamp (11) and less than the width of the second groove (15), a rotating shaft (16) is provided at the bottom of the clamp (11), a through hole (17) is provided at one end of the U-shaped block (8), the rotating shaft (16) is placed in the second through hole (17), the clamp (11) is rotatably connected to the U-shaped block (8) through the cooperation of the rotating shaft (16) and the second through hole (17), a clamping groove (18) is provided at the end of the end of the clamp (11) placed in the first groove (12), and the clamping groove (18) is detachably connected to the second groove (15).
3. The easily disassembled refining furnace cover according to claim 2 is characterized in that: A flange 2 (20) is provided at one end of the adjusting member (10), a flange 3 (19) is provided between the flange 2 (20) and the groove 2 (15), a groove 3 (21) is provided between the flange 3 (19) and the flange 2 (20), the groove 3 (21) is disposed in the through hole 1 (13), the flange 2 (20) and the groove 3 (21) are detachably connected, and the flange 3 (19) and the groove 3 (21) are detachably connected.
4. The easily disassembled refining furnace cover according to claim 1 is characterized in that: A frame (22) is provided above the furnace cover (1), four legs (23) are mounted on the lower end surface of the frame (22), a plurality of cylinders (24) are mounted on the upper end surface of the frame (22), a movable rod (25) is provided at the lower end of the cylinder (24), the movable rod (25) passes through the upper end of the frame (22), a hook (26) corresponding to the hanging ring (5) is mounted at the lower end of the movable rod (25), and the frame (22) is connected to the furnace cover (1) through the cooperation of the hook (26) and the hanging ring (5).
5. The easily disassembled refining furnace cover according to claim 4 is characterized in that: A fixed caster (27) is provided below the frame foot (23), and the fixed caster (27) comprises a mounting seat (28), a roller (29) and a second rotating shaft (30). One end of the mounting seat (28) is connected to the frame foot (23) on the frame (22), and the other end of the mounting seat (28) is provided with a fifth groove (31). The left and right sides of the fifth groove (31) are provided with a third through hole (32). The second rotating shaft (30) is installed in the middle of the roller (29), and the second rotating shaft (30) is placed in the third through hole (32). The roller (29) is rotatably connected to the mounting seat (28) through the cooperation of the second rotating shaft (30) and the third through hole (32).
6. The easily disassembled refining furnace cover according to claim 1 is characterized in that: An annular guide groove (33) is provided on the upper end surface of the furnace cover (1), and the longitudinal cross-section of the annular guide groove (33) is T-shaped. A buckle assembly is provided above the furnace cover (1), and the buckle assembly comprises a circular ring (34). A plurality of guide rods (35) are mounted on the circular ring (34), and the guide rods (35) are evenly distributed at the inner edge of the lower end of the circular ring (34). One end of the guide rod (35) is placed in the annular guide groove (33), and the longitudinal cross-section of one end of the guide rod (35) placed in the annular guide groove (33) is T-shaped. The circular ring (34) is connected to the guide rod by the guide rod. (35) and the annular guide groove (33) are slidably connected to the furnace cover (1), a plurality of connecting rods (36) are installed on the circular ring (34), and the connecting rods (36) are evenly distributed at the outer edge of the circular ring (34). The connecting rods (36) are placed between the two buckle assemblies, and a push rod (37) is installed at the bottom end of the connecting rod (36). The push rod (37) is inclined, and the position of the push rod (37) corresponds to the position of the round rod (14) on the upper buckle (6) and the position of the round rod (14) on the lower buckle (7).
7. The easily disassembled refining furnace cover according to claim 1 is characterized in that: A dust removal hole is provided on the upper end surface of the furnace cover (1), and a dust removal pipe (38) is installed on the upper end surface of the furnace cover (1), and one end of the dust removal pipe (38) is connected to the dust removal hole.
Citation Information
Patent Citations
Furnace cover of ladle refining furnace
CN220246180U