Storage tank inner wall polishing device

Abstract

The invention relates to the technical field of chemical storage tanks, and particularly discloses a storage tank inner wall polishing device which comprises a fixing plate, a polishing motor and a grinding head fixedly connected to the output end of the polishing motor. The polishing device is characterized by further comprising a connecting plate, the connecting plate is rotationally connected to the end of the fixing plate through 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 penetrates through the connecting plate to be connected with the grinding head; the mounting frame is arranged on the outer side face of the fixing plate, and crawling mechanisms attached to the inner wall of the storage tank for use are vertically and symmetrically mounted on the inner side of the mounting frame; according to the polishing device for the inner wall of the storage tank, attachment between the polishing device and the inner wall of the storage tank can be kept, the distance between the grinding head and the storage tank can be stably maintained, the polishing efficiency is improved while the polishing precision is guaranteed, adjustment and use are convenient, and the inner wall of the storage tank can be polished without dead corners.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical storage tanks, and more particularly to the technical field of polishing the inner wall of storage tanks, and specifically provides a device for polishing the inner wall of a storage tank. Background Art

[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, it is generally necessary to treat the interior of the storage tank. Among them, polishing is a common treatment process; For example, the patent with the authorization announcement number CN 220783463 U relates to a device for polishing the inner wall of a storage tank, including a support seat and a polishing assembly. The support seat is in the shape of a double-layer plate, and a lifting rod is vertically embedded in the support seat. The top of the lifting rod is installed with an extension plate, and the polishing assembly is installed through one 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 piece, and a second fixing piece; this utility model solves the problem that existing devices all use polishing wheels to polish the interior, but common polishing wheels cannot adapt to the inner diameter size of the storage tank during rotary polishing, and for storage tanks with small openings, they do not support the polishing wheel to penetrate deeply, and small polishing wheels are prone to incomplete polishing.

[0003] However, in combination with the actual current use, there are still certain drawbacks during the polishing operation of chemical storage tanks, such as: Common storage tank polishing generally uses manual polishing operations. The internal environment of the storage tank is narrow, and the noise is extremely loud and there is a lot of dust during the polishing operation inside, which affects health and has low efficiency; When a general polishing device is moved to the inside of the storage tank for polishing operations, it cannot ensure the stability of the 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 not convenient to adjust inside the storage tank and cannot ensure dead-angle-free polishing operations on the storage tank.

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

[0005] The purpose of the present invention is to provide a device for polishing the inner wall of a storage tank to solve the problems in the current internal polishing of storage tanks, such as low efficiency, unstable polishing operations, not being conducive to ensuring the smoothness of the storage tank after polishing, and not being able to ensure dead-angle-free polishing operations on the storage tank as mentioned in the above background art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: 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; It is characterized by further comprising: A connecting plate, wherein the connecting plate is rotatably connected to the end of the fixed plate through 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; An installation frame, wherein the installation frame is arranged on the outer side of the fixing plate, and a crawling mechanism attached to the inner wall of the storage tank is symmetrically installed on the inner side of the installation frame. The fixing shell is fixedly connected to the middle part of the inner side surface of the fixing plate, and a spacing adjustment mechanism connected to the installation frame is arranged on the inner side of the fixing shell for adjusting the spacing distance between the installation frame and the fixing plate.

[0007] Preferably, the crawling mechanism comprises: A transmission shaft, the transmission shaft is rotatably connected to the inner side of the installation frame, and the outer side of the transmission shaft is transmission-connected to a conveyor belt; The laminating magnetic plates are fixedly mounted on the outside of the conveyor belt, and the laminating magnetic plates are arranged at equal intervals on the outside of the conveyor belt.

[0008] Preferably, the spacing adjustment mechanism comprises: A connector, the connector being fixedly connected to a side of the installation frame close to the fixing plate in a vertically symmetrical manner; A first adjusting rod and a second adjusting rod, wherein the first adjusting rod and the second adjusting rod are respectively threadedly connected inside the connectors at the upper and lower sides; Among them, the first adjusting rod and the second adjusting rod are both 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 arranged between the driving gear and the driven gear, and the driving gear, the connecting gear and the driven gear are meshed and connected in sequence.

[0009] Preferably, a connecting channel is opened on one side of the middle part 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 retractable cantilever, the end of the retractable cantilever is fixedly connected to the rotating plate, the top of the retractable cantilever is connected with an insertion rod, the insertion rod is correspondingly inserted into the connecting channel between the fixed plate and the fixed shell, and the insertion 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 correspondingly, and the end of the support rod is fixedly connected to the rotating plate. A second telescopic rod is arranged below the support rod, and the head and tail ends of the second telescopic rod are hinged to the fixed shell and the rotating plate correspondingly.

[0012] Preferably, a rotating motor is connected to the middle of the outer side of the rotating plate. A sliding table is fixed to the outer side of the rotating motor. A lifting device is connected to the outer side of the sliding table, 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. The first lifting frame is fixedly connected to the surface of the support plate, and a lead screw is installed inside the first lifting frame for lifting and adjusting the sliding 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 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 outer side of the bottom of the support plate. A slide rail protrudes from the surface of the base plate, and a chute is recessed 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 chute; A universal wheel is installed on the left side of the bottom of the support plate, and a rotating magnetic plate is rotatably installed on the right side of the bottom of the base plate.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: The inner wall polishing device of the storage tank can maintain the adhesion with the inner wall of the storage tank, stably maintain the distance between the grinding head and the storage tank, ensure the polishing accuracy while improving the polishing efficiency, and is convenient for adjustment and use, and can polish the inner wall of the storage tank without dead angles; 1. In this solution, there are an installation frame, a conveyor belt and a fitting magnetic plate. A transmission shaft is rotatably installed inside the installation frame to drive the conveyor belt, and fitting magnetic plates are fixedly arranged at equal intervals on the outer side of the conveyor belt. The fitting magnetic plates can be magnetically adsorbed to the inner wall of the storage tank, so that the fixing plate can slide stably inside the storage tank through the installation frame; 2. In this solution, there are a connecting plate, a first telescopic rod and a grinding head. The connecting plate is rotatably connected to the fixing plate through a hinge. By the telescopic movement of the first telescopic rod, the connecting plate can be rotated at the end of the fixing plate, so as to adjust the angle of the connecting plate, and can adjust the angle of the grinding head or store the grinding head; 3. In this solution, a connector, a first adjusting rod, and a second adjusting rod are provided. Active gears and driven gears are respectively arranged at the ends of the first adjusting rod and the second adjusting rod. Through the sequential meshing between the active gear, the connecting gear, and the driven gear, the first adjusting rod and the second adjusting rod can rotate simultaneously, so as to adjust the distance of the mounting frame outside the fixed plate through the threaded connection between them 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. In this solution, a rotating plate, a telescopic cantilever, and a rotating motor are provided. Through the fixed connection between the rotating motor and the rotating plate, the rotating motor can be used to rotate the rotating plate, the telescopic cantilever, and the fixed plate as a whole. At the same time, the telescopic cantilever can be telescoped to adjust the direction and position; 5. In this solution, a support rod and a second telescopic rod are provided. Through the telescoping of the second telescopic rod, the fixed shell can be driven to rotate at the end of the support rod, so as to adjust the angle; 6. In this solution, a second lifting frame, a side plate, and a third telescopic rod are provided. Through the telescoping of the third telescopic rod, the second lifting frame can be driven to adjust the angle above the support plate, so as to adjust the position angle of the fixed plate; 7. In this solution, a support plate, a base plate, universal wheels, and a rotating magnetic plate are provided. Through the telescopic structure between the support plate and the base plate, the position of the rotating magnetic plate can be adjusted so that the rotating magnetic plate is located at the center of the storage tank. Using the rotating structure between the rotating magnetic plate and the base plate, the support plate and the fixed plate can be rotated for polishing. Description of the Drawings

[0017] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings: Figure 1 It is a schematic diagram of the overall left - hand structure of the present invention; Figure 2 It is a schematic diagram of the overall right - hand structure of the present invention; Figure 3 It is a schematic diagram of the overall structure of the fixed plate and the connecting plate of the present invention; Figure 4 It is a schematic diagram of the middle - part sectional structure of the fixed plate of the present invention; Figure 5 It is a schematic diagram of the disassembled sectional structure of the connector and the first adjusting rod of the present invention; Figure 6 It is a schematic diagram of the overall structure of the telescopic cantilever of the present invention; Figure 7 It is a schematic diagram of the disassembled structure of the support plate and the base plate of the present invention; Figure 8Schematic diagram of the overall left - hand structure of Embodiment 2 of the present invention; Figure 9 Schematic diagram of the overall right - hand structure of Embodiment 2 of the present invention; Figure 10 Schematic diagram of the overall structure of Embodiment 3 of the present invention.

[0018] In the figure: 1, fixed plate; 2, connecting plate; 3, first telescopic rod; 4, polishing motor; 5, grinding head; 6, handle; 7, mounting frame; 8, transmission shaft; 9, conveyor belt; 10, fitting magnetic plate; 11, connecting head; 12, first adjusting rod; 13, second adjusting rod; 14, driving gear; 15, connecting gear; 16, driven gear; 17, fixed shell; 18, inserting rod; 19, rotating plate; 20, telescopic cantilever; 201, support rod; 202, second telescopic rod; 21, sliding table; 22, rotating 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, chute; 29, rotating rod; 30, pressing plate; 31, universal wheel; 32, rotating magnetic plate. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, so as to fully understand how the present application uses technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Please refer to Figures 1-10 , the present invention provides the following technical solutions: Embodiment 1: In order to solve the problems that the current polishing device cannot stably maintain the distance between the polishing grinding head and the inner wall of the storage tank, cannot perform polishing without dead angles, and is not conducive to improving the polishing efficiency, This solution provides a polishing device for the inner wall of a storage tank, including: fixed plate 1, connecting plate 2, first telescopic rod 3, polishing motor 4, grinding head 5, handle 6, mounting frame 7, transmission shaft 8, conveyor belt 9, fitting magnetic plate 10, connecting head 11, first adjusting rod 12, second adjusting rod 13, driving gear 14, connecting gear 15, driven gear 16, fixed shell 17, inserting rod 18, rotating plate 19, telescopic cantilever 20, sliding table 21, rotating motor 22, first lifting frame 23, lead screw 24, support plate 25, base plate 26, slide rail 27, chute 28, rotating rod 29, pressing plate 30, universal wheel 31, rotating magnetic plate 32; Among them, the connecting plate 2 is rotatably connected to the end of the fixing plate 1 through 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 penetrates through the connecting plate 2 and is connected to the grinding head 5. The installation frame 7 is arranged on the outer side of the fixing plate 1, and a crawling mechanism for attaching to the inner wall of the storage tank is symmetrically installed up and down on the inner side of the installation frame 7. The fixed shell 17 is fixedly connected to the middle of the inner side of the fixing plate 1, and a spacing adjustment mechanism connected to the installation frame 7 is arranged inside the fixed shell 17 for adjusting the spacing between the installation frame 7 and the fixing plate 1.

[0021] Further, the crawling mechanism includes: a transmission shaft 8, a conveyor belt 9, and a fitting magnetic plate 10. The transmission shaft 8 is rotatably connected to the inside of the installation frame 7, and the conveyor belt 9 is drivingly connected to the outside of the transmission shaft 8. The fitting magnetic plate 10 is fixedly installed on the outside of the conveyor belt 9, and the fitting magnetic plates 10 are arranged at equal intervals on the outside of the conveyor belt 9.

[0022] In a specific application scenario, the transmission shaft 8 is rotatably installed inside the installation frame 7 to drive the conveyor belt 9. The fitting magnetic plates 10 are fixedly arranged at equal intervals on the outside of the conveyor belt 9, and the fitting magnetic plates 10 can be magnetically adsorbed to the inner wall of the storage tank. Thus, the fixing plate 1 can slide stably inside the storage tank through the installation frame 7. When polishing, the handle 6 symmetrically arranged inside the fixing plate 1 is held for polishing. At the same time, the angle between the connecting plate 2 and the fixing plate 1 can be adjusted by the telescopic movement of the first telescopic rod 3 to adjust the angle of the grinding head 5, or the grinding head 5 can be retracted to the inside so that the grinding head 5 does not contact the inner wall. Different precision grinding heads 5 can be arranged on the outside of the connecting plates 2 on the upper and lower sides for use to facilitate quick switching.

[0023] Further, the spacing adjustment mechanism includes: a connecting head 11, a first adjustment rod 12, and a second adjustment rod 13. The connecting heads 11 are symmetrically fixedly connected to the side of the installation frame 7 close to the fixing plate 1 up and down. The first adjustment rod 12 and the second adjustment rod 13 are respectively threadedly connected to the inside of the connecting heads 11 on the upper and lower sides. The first adjustment rod 12 and the second adjustment rod 13 are both rotatably connected to the inside of the fixed shell 17. A driving gear 14 is fixedly installed on the outside of the end of the first adjustment rod 12, and a driven gear 16 is fixedly installed on the outside of the end of the second adjustment rod 13. A connecting gear 15 is arranged between the driving gear 14 and the driven gear 16, and the driving gear 14, the connecting gear 15, and the driven gear 16 are sequentially meshed and drivingly connected.

[0024] In a specific application scenario, driving gears 14 and driven gears 16 are respectively arranged at the end parts of the first adjusting rod 12 and the second adjusting rod 13. When the first adjusting rod 12 is rotated through the sequential meshing between the driving gear 14, the connecting gear 15 and the driven gear 16, the first adjusting rod 12 and the second adjusting rod 13 can be rotated simultaneously. Thus, through the threaded connection between them and the connecting head 11, the connecting head 11 can slide inside the fixing plate 1, and further adjust the position of the mounting frame 7 outside the fixing plate 1, so as to adjust the distance between the mounting frame 7 and the fixing plate 1, and then adjust the distance between the fixing plate 1 and the storage tank, and further adjust the distance between the grinding head 5 and the storage tank, which is convenient for polishing.

[0025] Further, a connection channel is opened on one side of the middle part of the fixed shell 17 close to the fixing plate 1. A connection frame is installed inside the connection channel. The end of the connection frame is fixedly connected with a rotating plate 19. The connection frame is a telescopic cantilever 20. The end of the telescopic cantilever 20 is fixedly connected with the rotating plate 19. The top of the telescopic cantilever 20 is connected with a plug rod 18. The plug rod 18 is correspondingly inserted into the connection channel between the fixing plate 1 and the fixed shell 17, and the plug rod 18 is fixedly connected with the fixing plate 1 through a bolt. The middle part of the outer side of the rotating plate 19 is connected with a rotating motor 22, and a sliding table 21 is fixed on the outer side of the rotating motor 22.

[0026] In a specific application scenario, after the plug rod 18 is inserted into the fixed shell 17 and fixed with a bolt, the distance between the fixing plate 1 and the rotating plate 19 can be adjusted by the telescopic movement of the telescopic cantilever 20. And through the rotating motor 22 connected to the outer side of the rotating plate 19, the rotating plate 19 can be rotated to adjust the orientation of the overall structure of the rotating plate 19 and the fixing plate 1.

[0027] Further, a lifting device is connected to the outer side of the sliding 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. The first lifting frame 23 is fixedly connected to the surface of the support plate 25. A lead screw 24 is installed inside the first lifting frame 23 for lifting and adjusting the sliding table 21.

[0028] In a specific application scenario, driven by the motor at the top of the first lifting frame 23, the lead screw 24 rotates to lift and lower the sliding table 21, and then lift and lower the fixing plate 1. Through the adsorption between the attaching magnetic plate 10 and the storage tank, the fixing plate 1 can be stably attached to the storage tank for up and down lifting, so as to ensure that the grinding head 5 can stably perform polishing.

[0029] Further, a base plate 26 is connected to the outer side of the bottom of the support plate 25. A slide rail 27 is convexly provided on the surface of the base plate 26, and a chute 28 is recessed in 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 chute 28. A universal wheel 31 is installed on the left side of the bottom of the support plate 25, and a rotating magnetic plate 32 is rotatably installed on the right side of the bottom of the base plate 26.

[0030] In a specific application scenario, through 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 are adjusted based on the inner diameter of the storage tank, and the position of the rotating magnetic plate 32 can be adjusted so that the rotating magnetic plate 32 is located at the center of the storage tank. By rotating the rotating rod 29 on the side of the support plate 25, the pressing plate 30 can slide down through its threaded connection with the support plate 25. By pressing down the pressing plate 30, the limit between the support plate 25 and the base plate 26 is ensured. Using the rotating structure between the rotating magnetic plate 32 and the base plate 26, the support plate 25 and the fixing plate 1 can be rotated around the rotating magnetic plate 32 for polishing use. Embodiment

[0031] Different from the above embodiment, in this solution, a polishing device for the inner wall of a storage tank is provided, further including: 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 connection 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 head and tail ends of the second telescopic rod 202 are correspondingly hinged to the fixed shell 17 and the rotating plate 19 respectively.

[0032] In a specific application scenario, through the telescopic movement of the second telescopic rod 202, the fixed shell 17 can be driven to rotate at the end of the support rod 201, so as to cooperate for angle adjustment use. Embodiment

[0033] Different from the above embodiment, in this solution, a polishing device for the inner wall of a storage tank is provided, further including: 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. A side plate 232 is fixedly installed on the outer side of the middle 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.

[0034] In a specific application scenario, through the telescopic use of the third telescopic rod 233, the second lifting frame 231 can be driven to perform angle adjustment above the support plate 25, so as to adjust the position angle of the fixing plate 1 for polishing the corners and the top. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention; the content not described in detail in this specification belongs to the prior art well-known to those of ordinary skill 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 rather than absolute positions.

[0035] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tank inner wall polishing device, comprising: A fixed plate (1), a polishing motor (4), and a grinding head (5) fixedly connected to an output end of the polishing motor (4); It is characterized by further comprising: A connecting plate (2), the connecting plate (2) being rotatably connected to the end of the fixed plate (1) via a hinge, the polishing motor (4) being fixedly mounted at the middle of the inner side of the connecting plate (2), and the output end of the polishing motor (4) passing through the connecting plate (2) and connected to the grinding head (5); A mounting frame (7), the mounting frame (7) being arranged on the outer side of the fixing plate (1), and a crawling mechanism attached to the inner wall of the storage tank being symmetrically mounted on the inner side of the mounting frame (7) in an up-down manner; A fixed shell (17), the fixed shell (17) being fixedly connected to the middle portion of the inner side surface of the fixed plate (1), and a spacing adjustment mechanism connected to the mounting frame (7) is provided on the inner side of the fixed shell (17) for adjusting the spacing distance between the mounting frame (7) and the fixed plate (1).

2. A tank inner wall polishing device according to claim 1, characterized in that: The crawling mechanism comprises: A transmission shaft (8), the transmission shaft (8) being rotatably connected to the inner side of the mounting frame (7), and the outer side of the transmission shaft (8) being transmission-connected to a conveyor belt (9); The laminating magnetic plates (10) are fixedly mounted on the outside of the conveyor belt (9), and the laminating magnetic plates (10) are arranged at equal intervals on the outside of the conveyor belt (9).

3. The tank inner wall polishing device according to claim 1, characterized in that: The spacing adjustment mechanism comprises: A connecting head (11), the connecting head (11) being fixedly connected to a side of the mounting frame (7) close to the fixing plate (1) in a vertically symmetrical manner; A first adjusting rod (12) and a second adjusting rod (13), wherein the first adjusting rod (12) and the second adjusting rod (13) are respectively threadedly connected inside the connecting heads (11) at the upper and lower sides; The first adjusting rod (12) and the second adjusting rod (13) are both rotatably connected to the inner side of the fixed housing (17); a driving gear (14) is fixedly mounted on the outer side of the end of the first adjusting rod (12); a driven gear (16) is fixedly mounted on the outer side of the end of the second adjusting rod (13); a connecting gear (15) is arranged between the driving gear (14) and the driven gear (16); and the driving gear (14), the connecting gear (15) and the driven gear (16) are meshed and transmission-connected in sequence.

4. The tank inner wall polishing device according to claim 1, characterized in that: A connecting channel is provided on one side of the middle portion of the fixed shell (17) close to the fixed plate (1), 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.

5. A tank inner wall polishing device according to claim 4, characterized in that: The connecting frame is a retractable cantilever (20), the end of the retractable cantilever (20) is fixedly connected to the rotating plate (19), the top of the retractable cantilever (20) is connected to an insertion rod (18), the insertion rod (18) is correspondingly inserted into the connecting channel between the fixed plate (1) and the fixed shell (17), and the insertion rod (18) is fixedly connected to the fixed plate (1) by bolts.

6. The tank inner wall polishing device according to claim 4, characterized in that: The connecting frame is a 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), and a second telescopic rod (202) is arranged below the support rod (201), and the head and tail ends of the second telescopic rod (202) are respectively correspondingly hinged to the fixed shell (17) and the rotating plate (19).

7. A tank inner wall polishing device according to claim 5 or 6, characterized in that: A rotating 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 rotating motor (22), a lifting device is connected to the outer side of the slide table (21), and the bottom end of the lifting device is connected to the surface of the support plate (25).

8. The tank inner wall polishing device according to claim 7, characterized in that: The lifting device is a first lifting frame (23), the first lifting frame (23) is fixedly connected to the surface of the support plate (25), and a screw rod (24) is installed inside the first lifting frame (23) for adjusting the lifting and lowering of the slide table (21).

9. The tank inner wall polishing device according to claim 7, 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 on the outer side of the side plate (232), and the bottom end of the third telescopic rod (233) is rotatably connected to the side of the support plate (25).

10. The tank inner wall polishing device according to claim 1, characterized in that: The outer side of the bottom of the support plate (25) is connected to a base plate (26); a slide rail (27) is protruding from the surface of the base plate (26); a slide groove (28) is recessed 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 universal wheel (31) is mounted on the left side of the bottom of the support plate (25), and a rotating magnetic plate (32) is rotatably mounted on the right side of the bottom of the base plate (26).

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