A polishing device for the inner wall of a storage tank

Abstract

The present application relates to the technical fields of chemical storage tank, and discloses a polishing device for the inner wall of a storage tank, which comprises a fixed plate, a polishing motor and a grinding head fixedly connected to the output end of the polishing motor, characterized in that it further comprises a connecting plate rotatably connected to the end of the fixed plate through a hinge, the polishing motor is fixedly installed at the middle part of the inner side of the connecting plate, and the output end of the polishing motor penetrates through the connecting plate and is connected with the grinding head; an installation frame is arranged on the outer side of the fixed plate, and the inner side of the installation frame is symmetrically installed with a crawling mechanism attached to the inner wall of the storage tank; and a fixed shell is fixedly connected to the middle part of the inner side of the fixed plate. The polishing device for the inner wall of the storage tank can keep attaching to the inner wall of the storage tank, stably maintain the distance between the grinding head and the storage tank, ensure the polishing precision and improve the polishing efficiency, is convenient to adjust and use, and can be used to polish the inner wall of the storage tank without dead angle.

Description

Technical Field

[0001] This invention relates to the field of chemical storage tank technology, and more particularly to the field of tank inner wall polishing technology, specifically a tank inner wall polishing device. Background Technology

[0002] Storage tanks are generally used to store refined chemical substances such as acids, alkalis, alcohols, gases, and liquids. When storing chemical substances, in order to reduce oxidation and avoid chemical reactions, the inside of the storage tank usually needs to be treated, among which polishing is a common treatment process. For example, the patent with authorization announcement number CN 220783463 U relates to a polishing device for the inner wall of a storage tank, including a support base and a polishing assembly. The support base is in the shape of a double-layer plate, and a lifting rod is vertically embedded in the support base. An extension plate is installed on the top of the lifting rod, and a polishing assembly is installed through the end of the extension plate away from the lifting rod. The polishing assembly includes a rotating disk, a rotating motor, a rod-type locking assembly, a polishing arc plate, and a hollow groove. The rod-type locking assembly also includes a connecting rod, a first fixing plate, and a second fixing plate. This utility model solves the problem that existing devices all use polishing wheels to polish the interior. However, common polishing wheels cannot adapt to the inner diameter of the storage tank when rotating for polishing, and for storage tanks with small openings, they do not support the polishing wheel to penetrate deeply. Smaller polishing wheels are also prone to incomplete polishing.

[0003] However, based on current practical applications, there are still certain drawbacks in polishing chemical storage tanks, such as: Common tank polishing is usually done manually. However, the internal environment of a tank is confined, and polishing inside it is extremely noisy, produces a lot of dust, affects health, and is inefficient. When a typical polishing device is moved inside a storage tank to perform polishing operations, it cannot guarantee a stable distance between the polishing device and the storage tank, which is not conducive to ensuring the smoothness of the storage tank after polishing. Most polishing devices are inconvenient to adjust inside the storage tank, and cannot guarantee a thorough polishing operation without dead angles.

[0004] Therefore, we propose a tank inner wall polishing device to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a tank inner wall polishing device to solve the problems mentioned in the background art, such as low efficiency, unstable polishing operation, difficulty in ensuring the smoothness of the tank after polishing, and inability to guarantee a seamless polishing operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tank inner wall polishing device, comprising: a fixing plate, a polishing motor, and a grinding head fixedly connected to the output end of the polishing motor; Its characteristic is that it further includes: A connecting plate is rotatably connected to the end of a fixed plate via a hinge. The polishing motor is fixedly installed in the middle of the inner side of the connecting plate, and the output end of the polishing motor passes through the connecting plate and is connected to the grinding head. The mounting frame is located on the outer side of the fixed plate, and the inner side of the mounting frame is symmetrically equipped with a crawling mechanism for attaching to the inner wall of the storage tank. A fixed shell is fixedly connected to the middle of the inner side of the fixed plate, and the inner side of the fixed shell is provided with a spacing adjustment mechanism connected to the mounting frame for adjusting the spacing distance between the mounting frame and the fixed plate.

[0007] Preferably, the crawling mechanism includes: A drive shaft is rotatably connected to the inside of the mounting frame, and a conveyor belt is connected to the outside of the drive shaft. A bonding magnetic plate is fixedly installed on the outside of the conveyor belt, and the bonding magnetic plates are arranged at equal intervals on the outside of the conveyor belt.

[0008] Preferably, the spacing adjustment mechanism includes: The connector is symmetrically fixedly connected to the side of the mounting frame close to the fixing plate. The first adjusting rod and the second adjusting rod are respectively threaded into the connectors on the upper and lower sides; The first and second adjusting rods are rotatably connected to the inner side of the fixed shell. A driving gear is fixedly installed on the outer side of the end of the first adjusting rod, and a driven gear is fixedly installed on the outer side of the end of the second adjusting rod. A connecting gear is provided between the driving gear and the driven gear, and the driving gear, connecting gear and driven gear are sequentially meshed and connected for transmission.

[0009] Preferably, a connecting channel is provided on the side of the middle of the fixed shell close to the fixed plate, a connecting frame is installed on the inner side of the connecting channel, and a rotating plate is fixedly connected to the end of the connecting frame.

[0010] Preferably, the connecting frame is a telescopic cantilever, the end of which is fixedly connected to the rotating plate, and the top of which is connected to a plug rod. The plug rod is inserted into the connecting channel between the fixed plate and the fixed shell, and the plug rod is fixedly connected to the fixed plate by bolts.

[0011] Preferably, the connecting frame is a support rod, the top end of the support rod is hinged to the connecting channel of the fixed shell, and the end of the support rod is fixedly connected to the rotating plate. A second telescopic rod is provided below the support rod, and the two ends of the second telescopic rod are respectively hinged to the fixed shell and the rotating plate.

[0012] Preferably, a rotary motor is connected to the middle of the outer side of the rotating plate, a slide is fixed to the outer side of the rotary motor, a lifting device is connected to the outer side of the slide, and the bottom end of the lifting device is connected to the surface of the support plate.

[0013] Preferably, the lifting device is a first lifting frame, which is fixedly connected to the surface of the support plate, and a lead screw is installed inside the first lifting frame for adjusting the lifting of the slide table.

[0014] Preferably, the lifting device is a second lifting frame, the bottom of the second lifting frame is rotatably connected to the surface of the support plate, a side plate is fixedly installed on the outer side of the middle part of the second lifting frame, and a third telescopic rod is hinged to the outer side of the side plate, the bottom end of the third telescopic rod is rotatably connected to the side of the support plate.

[0015] Preferably, a base plate is connected to the bottom outer side of the support plate, a slide rail is provided on the surface of the base plate, and a slide groove is provided on the bottom surface of the support plate. The support plate and the base plate form a sliding structure through the engagement between the slide rail and the slide groove. A caster wheel is installed on the bottom left side of the support plate, and a rotating magnetic plate is rotatably installed on the bottom right side of the base plate.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: the tank inner wall polishing device can maintain the adhesion between itself and the inner wall of the tank, stably maintain the distance between the grinding head and the tank, ensure polishing accuracy while improving polishing efficiency, and is easy to adjust and use, and can polish the inner wall of the tank without dead angles. 1. This solution includes an installation frame, a conveyor belt, and a magnetic plate. A drive shaft is rotatably mounted on the inner side of the installation frame to drive the conveyor belt. Magnetic plates are fixed at equal intervals on the outer side of the conveyor belt. The magnetic plates can magnetically adhere to the inner wall of the storage tank, allowing the fixing plate to slide stably inside the storage tank via the installation frame. 2. This solution includes a connecting plate, a first telescopic rod, and a grinding head. The connecting plate is rotatably connected to the fixed plate via a hinge. By extending and retracting the first telescopic rod, the connecting plate can be rotated at the end of the fixed plate, thereby adjusting the angle of the connecting plate and adjusting the angle of the grinding head or storing and using the grinding head. 3. This solution includes a connector, a first adjusting rod, and a second adjusting rod. The ends of the first adjusting rod and the second adjusting rod are respectively equipped with a driving gear and a driven gear. Through the sequential meshing of the driving gear, the connecting gear, and the driven gear, the first adjusting rod and the second adjusting rod can rotate simultaneously. This allows the distance between the mounting frame and the outside of the fixed plate to be adjusted through the threaded connection between the rod and the connector, thereby adjusting the distance between the fixed plate and the storage tank, and further adjusting the distance between the grinding head and the storage tank. 4. This solution includes a rotating plate, a telescopic cantilever, and a rotary motor. Through the fixed connection between the rotary motor and the rotating plate, the rotating plate, telescopic cantilever, and fixed plate can be rotated as a whole by the rotary motor. At the same time, the telescopic cantilever can extend and retract, and its direction and position can be adjusted. 5. This solution includes a support rod and a second telescopic rod. By extending or retracting the second telescopic rod, the fixed shell can be rotated at the end of the support rod, thereby adjusting the angle for use. 6. This solution includes a second lifting frame, a side plate, and a third telescopic rod. By extending and retracting the third telescopic rod, the second lifting frame can be adjusted in angle above the support plate, thereby adjusting the position and angle of the fixed plate. 7. This solution includes a support plate, a base plate, casters, and a rotating magnetic plate. The position of the rotating magnetic plate can be adjusted by the telescopic structure between the support plate and the base plate, so that the rotating magnetic plate is located in the center of the storage tank. The rotation structure between the rotating magnetic plate and the base plate can be used to rotate the support plate and the fixed plate for polishing. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall left side structure of the present invention; Figure 2 This is a schematic diagram of the overall right-side structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the fixing plate and connecting plate of the present invention; Figure 4 This is a schematic diagram of the middle section of the fixing plate of the present invention; Figure 5 This is a schematic diagram of the disassembled cross-section of the connector and the first adjusting rod of the present invention; Figure 6 This is a schematic diagram of the overall structure of the telescopic cantilever of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the support plate and base plate of the present invention; Figure 8This is a schematic diagram of the overall left side structure of Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the overall right-side structure of Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention.

[0018] In the diagram: 1. Fixed plate; 2. Connecting plate; 3. First telescopic rod; 4. Polishing motor; 5. Grinding head; 6. Handle; 7. Mounting frame; 8. Drive shaft; 9. Conveyor belt; 10. Adhesive magnetic plate; 11. Connector; 12. First adjusting rod; 13. Second adjusting rod; 14. Drive gear; 15. Connecting gear; 16. Driven gear; 17. Fixed shell; 18. Insert rod; 19. Rotating plate; 20. Telescopic cantilever; 201. Support rod; 202. Second telescopic rod; 21. Slide table; 22. Rotary motor; 23. First lifting frame; 231. Second lifting frame; 232. Side plate; 233. Third telescopic rod; 24. Lead screw; 25. Support plate; 26. Base plate; 27. Slide rail; 28. Slide groove; 29. ​​Rotating rod; 30. Pressure plate; 31. Caster wheel; 32. Rotating magnetic plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Please see Figure 1-10 The present invention provides the following technical solution: Example 1: To address the problem that current polishing devices cannot stably maintain the distance between the polishing head and the inner wall of the storage tank, and cannot polish without dead angles, thus hindering the improvement of polishing efficiency, This solution provides a tank inner wall polishing device, including: a fixed plate 1, a connecting plate 2, a first telescopic rod 3, a polishing motor 4, a grinding head 5, a handle 6, a mounting frame 7, a transmission shaft 8, a conveyor belt 9, a bonding magnetic plate 10, a connector 11, a first adjusting rod 12, a second adjusting rod 13, a driving gear 14, a connecting gear 15, a driven gear 16, a fixed shell 17, an insert rod 18, a rotating plate 19, a telescopic cantilever 20, a slide table 21, a rotary motor 22, a first lifting frame 23, a lead screw 24, a support plate 25, a base plate 26, a slide rail 27, a slide groove 28, a rotating rod 29, a pressure plate 30, a caster wheel 31, and a rotating magnetic plate 32; The connecting plate 2 is rotatably connected to the end of the fixed plate 1 via a hinge. The polishing motor 4 is fixedly installed in the middle of the inner side of the connecting plate 2, and the output end of the polishing motor 4 passes through the connecting plate 2 and is connected to the grinding head 5. The mounting frame 7 is set on the outer side of the fixed plate 1, and the inner side of the mounting frame 7 is symmetrically equipped with a crawling mechanism for attaching to the inner wall of the storage tank. The fixed shell 17 is fixedly connected to the middle of the inner side of the fixed plate 1, and the inner side of the fixed shell 17 is provided with a spacing adjustment mechanism connected to the mounting frame 7 for adjusting the spacing between the mounting frame 7 and the fixed plate 1.

[0021] Furthermore, the crawling mechanism includes: a drive shaft 8, a conveyor belt 9, and a bonding magnetic plate 10. The drive shaft 8 is rotatably connected to the inner side of the mounting frame 7, and the outer side of the drive shaft 8 is connected to the conveyor belt 9. The bonding magnetic plate 10 is fixedly installed on the outer side of the conveyor belt 9, and the bonding magnetic plates 10 are evenly spaced on the outer side of the conveyor belt 9.

[0022] In specific application scenarios, a drive shaft 8 is rotatably mounted on the inner side of the mounting frame 7 to drive the conveyor belt 9, and magnetic plates 10 are fixed at equal intervals on the outer side of the conveyor belt 9. The magnetic plates 10 can be magnetically attracted to the inner wall of the storage tank, so that the fixing plate 1 can slide stably inside the storage tank through the mounting frame 7. This allows for polishing by holding the handle 6, which is symmetrically mirrored on the inner side of the fixing plate 1. At the same time, the angle between the connecting plate 2 and the fixing plate 1 can be adjusted by extending and retracting the first telescopic rod 3, so that the angle of the grinding head 5 can be adjusted, or the grinding head 5 can be stored inside so that the grinding head 5 does not contact the inner wall. Grinding heads 5 of different precision can be set on the outer side of the connecting plates 2 on the upper and lower sides for quick switching.

[0023] Furthermore, the spacing adjustment mechanism includes: a connector 11, a first adjusting rod 12, and a second adjusting rod 13. The connector 11 is symmetrically fixedly connected to one side of the mounting frame 7 close to the fixed plate 1. The first adjusting rod 12 and the second adjusting rod 13 are respectively threaded inside the connector 11 on both the upper and lower sides. The first adjusting rod 12 and the second adjusting rod 13 are rotatably connected to the inner side of the fixed shell 17. A drive gear 14 is fixedly installed on the outer side of the end of the first adjusting rod 12, and a driven gear 16 is fixedly installed on the outer side of the end of the second adjusting rod 13. A connecting gear 15 is provided between the drive gear 14 and the driven gear 16. The drive gear 14, the connecting gear 15, and the driven gear 16 are sequentially meshed and connected for transmission.

[0024] In specific application scenarios, the ends of the first adjusting rod 12 and the second adjusting rod 13 are respectively provided with a driving gear 14 and a driven gear 16. Through the sequential meshing between the driving gear 14, the connecting gear 15 and the driven gear 16, when the first adjusting rod 12 is rotated, the first adjusting rod 12 and the second adjusting rod 13 can rotate simultaneously. Thus, through the threaded connection between them and the connecting head 11, the connecting head 11 slides on the inner side of the fixed plate 1, thereby adjusting the position of the mounting frame 7 on the outer side of the fixed plate 1, thereby adjusting the distance between the mounting frame 7 and the fixed plate 1, adjusting the distance between the fixed plate 1 and the storage tank, and further adjusting the distance between the grinding head 5 and the storage tank for polishing purposes.

[0025] Furthermore, a connecting channel is provided on the side of the fixed shell 17 close to the fixed plate 1 in the middle. A connecting frame is installed on the inner side of the connecting channel. A rotating plate 19 is fixedly connected to the end of the connecting frame. The connecting frame is a telescopic cantilever 20. The end of the telescopic cantilever 20 is fixedly connected to the rotating plate 19. A plug rod 18 is connected to the top of the telescopic cantilever 20. The plug rod 18 is inserted into the connecting channel between the fixed plate 1 and the fixed shell 17. The plug rod 18 is fixedly connected to the fixed plate 1 by bolts. A rotary motor 22 is connected to the middle of the outer side of the rotating plate 19. A slide table 21 is fixed to the outer side of the rotary motor 22.

[0026] In specific application scenarios, the insertion rod 18 is inserted into the fixed shell 17 and then bolted in place. The distance between the fixed plate 1 and the rotating plate 19 can be adjusted by extending and retracting the telescopic cantilever 20. The rotating plate 19 can be rotated by the rotating motor 22 connected to the outside of the rotating plate 19, so that the overall structure of the rotating plate 19 and the fixed plate 1 can be adjusted in position.

[0027] Furthermore, a lifting device is connected to the outside of the slide table 21. The bottom end of the lifting device is connected to the surface of the support plate 25. The lifting device is a first lifting frame 23, which is fixedly connected to the surface of the support plate 25. A lead screw 24 is installed inside the first lifting frame 23 for adjusting the lifting of the slide table 21.

[0028] In specific application scenarios, the first lifting frame 23 is driven by the top motor, which causes the lead screw 24 to rotate and lift the slide table 21, thereby lifting the fixed plate 1. Through the adsorption between the magnetic plate 10 and the storage tank, the fixed plate 1 is stably attached to the storage tank and moves up and down to ensure that the grinding head 5 can be used for polishing stably.

[0029] Furthermore, a base plate 26 is connected to the bottom outer side of the support plate 25. A slide rail 27 is provided on the surface of the base plate 26, and a slide groove 28 is provided on the bottom surface of the support plate 25. The support plate 25 and the base plate 26 form a sliding structure through the engagement between the slide rail 27 and the slide groove 28. A caster wheel 31 is installed on the bottom left side of the support plate 25, and a rotating magnetic plate 32 is rotatably installed on the bottom right side of the base plate 26.

[0030] In specific application scenarios, by using the telescopic structure between the support plate 25 and the base plate 26, the lengths of the support plate 25 and the base plate 26 can be adjusted based on the inner diameter of the tank, thereby adjusting the position of the rotating magnetic plate 32 so that the rotating magnetic plate 32 is located at the center of the tank. By rotating the side rotating rod 29 of the support plate 25, the pressure plate 30 can slide down through its threaded connection with the support plate 25. By pressing down with the pressure plate 30, the support plate 25 and the base plate 26 are kept in a limited position. Utilizing the rotational structure between the rotating magnetic plate 32 and the base plate 26, the support plate 25 and the fixed plate 1 can be rotated around the rotating magnetic plate 32 for polishing. Example

[0031] The difference from the above embodiments is that this solution provides a tank inner wall polishing device, which further includes: a support rod 201 and a second telescopic rod 202. The connecting frame is the support rod 201. The top end of the support rod 201 is correspondingly hinged to the connecting channel of the fixed shell 17, and the end of the support rod 201 is fixedly connected to the rotating plate 19. The second telescopic rod 202 is provided below the support rod 201. The first and last ends of the second telescopic rod 202 are respectively hinged to the fixed shell 17 and the rotating plate 19.

[0032] In specific application scenarios, the extension and retraction of the second telescopic rod 202 can drive the fixed shell 17 to rotate at the end of the support rod 201, thereby enabling angle adjustment. Example

[0033] The difference from the above embodiments is that this solution provides a tank inner wall polishing device, which further includes: a second lifting frame 231, a side plate 232 and a third telescopic rod 233. The lifting device is the second lifting frame 231. The bottom of the second lifting frame 231 is rotatably connected to the surface of the support plate 25. The side plate 232 is fixedly installed on the outer side of the middle part of the second lifting frame 231, and the third telescopic rod 233 is hinged to the outer side of the side plate 232. The bottom end of the third telescopic rod 233 is rotatably connected to the side of the support plate 25.

[0034] In specific application scenarios, by extending and retracting the third telescopic rod 233, the second lifting frame 231 can be adjusted in angle above the support plate 25, thereby adjusting the position and angle of the fixing plate 1 for use in polishing corners and tops. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention; the contents not described in detail in this specification belong to the prior art known to those skilled in the art; in addition, the directional terms such as up, down, left, right, front, and back in the text only represent their relative positions and not absolute positions.

[0035] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0036] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A polishing device for the inner wall of a storage tank, comprising: Fixed plate (1), polishing motor (4) and grinding head (5) fixedly connected to the output end of polishing motor (4); Its characteristic is that it further includes: The connecting plate (2) is rotatably connected to the end of the fixed plate (1) by a hinge. The polishing motor (4) is fixedly installed in the middle of the inner side of the connecting plate (2), and the output end of the polishing motor (4) passes through the connecting plate (2) and is connected to the grinding head (5). The mounting frame (7) is set on the outer side of the fixing plate (1), and the inner side of the mounting frame (7) is symmetrically equipped with a crawling mechanism for attaching to the inner wall of the storage tank. The fixed shell (17) is fixedly connected to the middle of the inner side of the fixed plate (1), and the inner side of the fixed shell (17) is provided with a spacing adjustment mechanism connected to the mounting frame (7) for adjusting the spacing distance between the mounting frame (7) and the fixed plate (1). The crawling mechanism includes a drive shaft (8) and a magnetic plate (10). The drive shaft (8) is rotatably connected to the inner side of the mounting frame (7), and a conveyor belt (9) is driven to the outer side of the drive shaft (8). The magnetic plate (10) is fixedly installed on the outer side of the conveyor belt (9), and the magnetic plates (10) are evenly spaced on the outer side of the conveyor belt (9). The spacing adjustment mechanism includes: a connector (11), a first adjusting rod (12), and a second adjusting rod (13). The connector (11) is symmetrically fixedly connected to the side of the mounting frame (7) close to the fixing plate (1). The connector (11) on both the upper and lower sides is threaded with the first adjusting rod (12) and the second adjusting rod (13). The first adjusting rod (12) and the second adjusting rod (13) are rotatably connected to the inside of the fixing shell (17). The outer end of the first adjusting rod (12) is fixedly installed with a drive gear (14), and the outer end of the second adjusting rod (13) is fixedly installed with a driven gear (16). A connecting gear (15) is provided between the drive gear (14) and the driven gear (16). The drive gear (14), the connecting gear (15), and the driven gear (16) are sequentially meshed and connected.

2. The tank inner wall polishing device according to claim 1, characterized in that: A connecting channel is provided on the side of the fixed shell (17) close to the fixed plate (1) in the middle. A connecting frame is installed on the inner side of the connecting channel, and a rotating plate (19) is fixedly connected to the end of the connecting frame.

3. The tank inner wall polishing device according to claim 2, characterized in that: The connecting frame is a telescopic cantilever (20). The end of the telescopic cantilever (20) is fixedly connected to the rotating plate (19). The top of the telescopic cantilever (20) is connected to a plug rod (18). The plug rod (18) is inserted into the connecting channel between the fixed plate (1) and the fixed shell (17). The plug rod (18) is fixedly connected to the fixed plate (1) by bolts.

4. The tank inner wall polishing device according to claim 2, characterized in that: The connecting frame is a support rod (201). The top end of the support rod (201) is hinged to the connecting channel of the fixed shell (17), and the end of the support rod (201) is fixedly connected to the rotating plate (19). A second telescopic rod (202) is provided below the support rod (201). The two ends of the second telescopic rod (202) are hinged to the fixed shell (17) and the rotating plate (19) respectively.

5. A tank inner wall polishing device according to claim 3 or 4, characterized in that: A rotary motor (22) is connected to the middle of the outer side of the rotating plate (19). A slide (21) is fixed to the outer side of the rotary motor (22). A lifting device is connected to the outer side of the slide (21). The bottom end of the lifting device is connected to the surface of the support plate (25).

6. The tank inner wall polishing device according to claim 5, characterized in that: The lifting device is a first lifting frame (23), which is fixedly connected to the surface of the support plate (25). A lead screw (24) is installed inside the first lifting frame (23) for adjusting the lifting of the slide (21).

7. The tank inner wall polishing device according to claim 5, characterized in that: The lifting device is a second lifting frame (231). The bottom of the second lifting frame (231) is rotatably connected to the surface of the support plate (25). A side plate (232) is fixedly installed on the outer side of the middle part of the second lifting frame (231), and a third telescopic rod (233) is hinged to the outer side of the side plate (232). The bottom end of the third telescopic rod (233) is rotatably connected to the side of the support plate (25).

8. The tank inner wall polishing device according to claim 7, characterized in that: The bottom outer side of the support plate (25) is connected to the base plate (26). The surface of the base plate (26) is provided with a slide rail (27) protruding outwards, and the bottom surface of the support plate (25) is provided with a slide groove (28). The support plate (25) and the base plate (26) form a sliding structure through the engagement between the slide rail (27) and the slide groove (28). A caster wheel (31) is installed on the bottom left side of the support plate (25), and a rotating magnetic plate (32) is rotatably installed on the bottom right side of the base plate (26).

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