Sand blasting cleaning device for inner wall of roller and cleaning method of sand blasting cleaning device

Abstract

The invention provides a sand blasting cleaning device for the inner wall of a roller and a cleaning method thereof, and relates to the technical field of cleaning devices.The sand blasting cleaning device comprises a horizontal supporting table, a rotary table, a horizontal cross and a plurality of upper shell covers, the horizontal cross is driven by the rotary table to intermittently rotate, and the four ends of the horizontal cross are each connected with one upper shell cover through an adapter rod; a plurality of groups of clamping blocks driven by inclined plane mechanisms are arranged in each upper shell cover, synchronous radial clamping of the roller can be realized, the horizontal supporting table is provided with four stations, namely a feeding station, a sand blasting station, a discharging station and a detection station, and the feeding station and the discharging station are provided with lifting cylinders for automatic feeding and discharging of the roller; according to the roller cleaning device, the four stations are driven to operate synchronously through the rotary table, whole-process automation and continuity of roller cleaning are achieved, clamping is stable, damage is small, and the cleaning efficiency and quality are remarkably improved.

Description

A sandblasting cleaning device and method for the inner wall of a drum. Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and in particular to a sandblasting cleaning device and method for the inner wall of a drum. Background Technology

[0002] In the surface treatment industry, cleaning oil stains and impurities on the inner wall of drums mainly relies on hammering, scraping, or chemical soaking. This method is characterized by high labor intensity, low efficiency, environmental pollution, and easy damage to the drum substrate. Although sandblasting cleaning technology exists, existing equipment mostly uses a single-station, three-jaw chuck clamping method, which has a low degree of automation. Clamping may cause damage to the outer wall of the drum, and the loading and unloading time occupies the effective cleaning time, resulting in low overall efficiency. Therefore, there is an urgent need for a sandblasting cleaning device and cleaning method for the inner wall of drums that can achieve automatic loading and unloading, flexible clamping, and multi-station continuous operation. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a sandblasting cleaning device and method for the inner wall of a drum, so as to achieve efficient, automated, low-damage, and continuous production of drum cleaning.

[0004] This invention provides the following technical solution: a sandblasting cleaning device for the inner wall of a drum, comprising: a horizontal support platform; a turntable, disposed at the center of the horizontal support platform and driven by a drive mechanism to rotate intermittently; a horizontal crossbar, installed above the drive end of the turntable via a lifting cylinder, each of the four ends of the horizontal crossbar being connected to a rotary motor via a connecting rod, the drive end of the rotary motor being connected downward to an upper cover via the connecting rod; the upper cover is provided with a drum clamping mechanism for synchronously clamping the drum circumferentially from the outer wall of the drum; the horizontal support platform is provided with four docking holes corresponding to the movement trajectories of the four upper covers, the four docking holes respectively constituting a loading station, a sandblasting station, a unloading station, and a testing station.

[0005] The above solution constructs a core multi-station collaborative operation framework. By intermittently rotating a horizontal cross driven by a turntable, four stations can operate in parallel, completely overlapping non-productive loading / unloading and inspection times with the core sandblasting and cleaning time. This fundamentally eliminates waiting time between processes, achieving near-continuous assembly line production and significantly improving equipment utilization and overall production efficiency.

[0006] Preferably, the roller clamping mechanism includes: a base plate, which is vertically and flexibly disposed within the upper shell cover via a top cylinder; multiple base blocks, which are uniformly fixed around the periphery of the base plate in the circumferential direction, each base block having a first inclined surface at its bottom; and multiple positioning groups, which are uniformly disposed around the upper shell cover in the circumferential direction, each positioning group including a horizontally movable guide rod, a clamping block connected to the inner end of the guide rod, and a guide block connected to the outer end of the guide rod, the guide block having a second inclined surface that slides in cooperation with the first inclined surface; wherein, the top cylinder drives the base plate to rise and fall, and through the cooperation of the first and second inclined surfaces, the vertical movement of the base plate is converted into the horizontal radial movement of the guide rod, thereby driving all clamping blocks to synchronously approach or move away to clamp or release the roller.

[0007] The above solution provides an innovative multi-point synchronous radial clamping method. By driving the base plate to rise and fall with a top cylinder, and utilizing inclined planes to convert vertical motion into horizontal radial motion of the clamping blocks, synchronous opening and closing of all clamping blocks is achieved. This design ensures that the clamping force is evenly distributed across the entire circumference of the drum's outer wall, avoiding localized stress concentration and indentation damage that may occur with traditional chucks. It is particularly suitable for cleaning applications requiring high-speed rotation, and offers extremely high clamping stability.

[0008] Preferably, the first inclined surface is provided with a T-shaped guide rail, and the second inclined surface is provided with a T-shaped guide groove that slides with the T-shaped guide rail.

[0009] In the above solution, the sliding engagement of T-shaped guide rails and T-shaped guide grooves on the inclined plane provides precise guidance and limiting for the inclined plane transmission mechanism. This effectively prevents the guide block from shifting or disengaging under force, ensuring the smoothness and reliability of power transmission, making the clamping action more precise and smooth, reducing wear on the mechanism, and extending its service life.

[0010] Preferably, the number of clamping blocks is eight or more, and they are evenly distributed along the circumference.

[0011] In the above scheme, the number of clamping blocks is specified to be eight or more and evenly distributed circumferentially, which further optimizes the clamping effect. More clamping points mean a finer and more uniform distribution of clamping force, thereby reducing the clamping force required for a single clamping block while ensuring sufficient clamping force, minimizing potential damage to the outer wall of the roller, and is especially suitable for rollers with high surface finish requirements.

[0012] Preferably, a lifting mechanism is provided at both the loading station and the unloading station. The lifting mechanism includes: a lifting cylinder mounted on a horizontal support platform; and a lifting frame connected to the drive end of the lifting cylinder, used to support and lift the roller through the docking hole to enter or exit the upper shell cover.

[0013] The above solution achieves automated loading and unloading of the rollers. Through the cooperation of the lifting cylinder and the lifting frame, the rollers can be automatically lifted from below the horizontal support platform to the clamping position or removed from the clamping position and sent to the unloading position, replacing inefficient and heavy manual operation. This is a key link in achieving full-process automation and significantly reduces labor intensity.

[0014] Preferably, the lifting frame includes a base platform and a docking block mounted on the base platform for docking with the docking hole, wherein the docking block has a conical positioning post at its center for aligning with the roller port.

[0015] In the above scheme, the conical positioning pins on the lifting frame serve as the initial centering point. As the roller is lifted into the upper housing, the positioning pins automatically guide the roller's end to center, ensuring that the roller's axis of rotation is essentially aligned with the rotation axis of the clamping mechanism. This not only improves the accuracy and efficiency of clamping but also lays the foundation for the subsequent smooth rotation of the roller.

[0016] Preferably, the sandblasting station has a connecting ring inside the docking hole. The top of the connecting ring is pressed against the bottom of the lowered upper cover and can be rotated by the upper cover. The top of a sandblasting machine is pressed against a horizontal support platform and surrounds the bottom outer ring of the connecting ring. Below the docking hole of the inspection station, there is a set of mounting grooves installed on the bottom side of the horizontal support platform. A set of cameras for taking pictures to detect whether there is any abnormality in the material feeding or other abnormal conditions inside the upper cover is installed in the mounting grooves.

[0017] In the above solution, a crucial sealed environment is created at the sandblasting station. The adapter ring, serving as the connection between the upper cover and the sandblasting machine, allows the upper cover to drive the roller to rotate freely while simultaneously forming an effective seal, preventing abrasive and dust leakage during sandblasting and ensuring a clean and environmentally friendly working environment. Simultaneously, a camera is installed at the inspection station to monitor in real time whether the material feeding is successful or if any other abnormalities exist, achieving process quality control and equipment status monitoring, thus enhancing the system's intelligence and reliability.

[0018] Preferably, the bottom end of the upper shell cover is provided with a positioning groove, and the top of the adapter ring is provided with a positioning pin that is inserted into the positioning groove.

[0019] In the above solution, the circumferential positioning between the upper cover and the adapter ring is achieved through the insertion and engagement of the positioning groove and the positioning pin. This not only transmits torque more reliably, causing the adapter ring to rotate accordingly and reducing wear caused by pure friction drive, but also enhances the stability and sealing effect of the connection between the two.

[0020] Preferably, the sandblasting machine is equipped with a spray gun angle adjustment mechanism, including: a lifting rod, which is driven by a drive cylinder to be vertically raised and lowered; an arc-shaped rail groove, installed at the end of the lifting rod; a spray gun, the holding end of which is rotatably disposed in the arc-shaped rail groove via an arc-shaped rotating block; a rotating rod, which is rotatably installed at the center of the arc segment of the arc-shaped rail groove and is driven to rotate by a drive motor; and a connecting rod, one end of which is fixed to the arc-shaped rotating block and the other end of which is fixed to the rotating rod; wherein, driving the rotating rod to rotate can drive the arc-shaped rotating block and the spray gun to change the spray angle along the arc-shaped rail groove through the connecting rod.

[0021] The above solution provides high-precision adjustment capabilities for the spray gun angle and height. The vertical position of the spray gun is controlled by a lifting rod, and the spray angle is changed via a linkage mechanism. This allows the abrasive flow to precisely cover different areas of the drum's inner wall, ensuring thorough cleaning without blind spots. This achieves comprehensive, uniform, and efficient cleaning of the drum's inner wall, adapting to drums of different sizes and levels of contamination.

[0022] A method for sandblasting the inner wall of a drum, based on the aforementioned sandblasting device for cleaning the inner wall of a drum, includes the following steps: S1, Loading: The turntable is stationary, and the lifting mechanism at the loading station sends the drum to be cleaned into the corresponding upper cover. After the clamping mechanism clamps the drum, the lifting mechanism descends; S2, Rotation: The turntable drives the horizontal cross and all upper covers to rotate 90°, moving the drums at each station to the next station; S3, Sandblasting: The upper cover at the sandblasting station descends and presses against the transition ring to form a seal. The rotary motor drives the upper cover and the drum to rotate, and the spray gun in the sandblasting machine performs sandblasting cleaning on the inner wall of the drum; S4, Unloading and Inspection: After cleaning, the turntable rotates 90° again, and the cleaned drum moves to the unloading station where the lifting mechanism picks up the unloaded drum; simultaneously, the newly loaded drum enters the sandblasting station, and the unloaded upper cover is monitored at the inspection station; Steps S1 to S4 are repeated to achieve continuous cyclic operation.

[0023] The above scheme defines a continuous cleaning method based on the device. This method integrates the features of the various devices into an organic, cyclical work process, systematically describing the entire process from automatic feeding, precise positioning and clamping, multi-station flow, sandblasting cleaning to automatic unloading and inspection. This method allows the four stations to operate in parallel without conflict, transforming the high-efficiency, automated, and high-quality cleaning capabilities of the device into actual productivity.

[0024] The beneficial effects of this invention are as follows: The device mainly includes a horizontal support platform, a turntable, a horizontal cross, and multiple upper shell covers. The turntable is driven by a motor and can rotate intermittently (90° each time). The horizontal cross is installed above the turntable via a lifting cylinder, and each of its four ends is connected to an upper shell cover via a connecting rod and a rotary motor. The core innovations are: 1. Multi-station collaborative design: The horizontal support platform has four stations (loading, sandblasting, unloading, and inspection). Through the intermittent rotation of the turntable, the four upper shell covers can operate simultaneously at different stations, parallelizing the loading, cleaning, unloading, and inspection processes and eliminating waiting time between processes; 2. Multi-point synchronous radial clamping mechanism: Each upper shell cover is equipped with a clamping mechanism driven by an inclined plane mechanism. The base plate is lifted and lowered by a top cylinder. The base block of the base plate in the circumferential direction drives the inclined plane to drive the guide block and guide rod, driving more than 8 clamping blocks to move synchronously radially, uniformly clamping the outer wall of the roller in the circumferential direction. This clamping method distributes force evenly and disperses the clamping force, avoiding localized indentation damage that may be caused by traditional chucks. It also has excellent clamping stability and is particularly suitable for high-speed rotation conditions. 3. Automatic loading and unloading and pressing and sealing: The loading and unloading stations are equipped with lifting mechanisms with conical positioning columns to realize automatic centering, lifting and handover of the roller. The sandblasting station is equipped with a transition ring, which forms a pressing seal with the upper cover after it is lowered. This serves as the top cover of the sandblasting machine to prevent dust leakage and allows the upper cover to drive the roller to rotate freely. In order to further improve the sealing effect, a sealing ring can also be attached to the bottom of the upper cover to ensure that the sealing effect is improved during pressing. This is existing technology and will not be described in detail here. 4. Adjustable spray gun mechanism: The spray gun in the sandblasting machine is installed on a mechanism that can be raised and lowered and the angle can be adjusted. Through the connecting rod crank mechanism, the spray angle and height of the spray gun can be precisely controlled to ensure comprehensive and uniform cleaning of the inner wall of the roller. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 is a structural schematic diagram of the device of the present invention along the loading end and unloading end; Figure 2 is a structural schematic diagram of the device of the present invention along the sandblasting end and detection end; Figure 3 is a top view of the horizontal cross; Figure 4 is a structural schematic diagram of the positions of the four sets of docking holes on the horizontal support platform; The markings in the figures are: 1, horizontal support platform; 101, loading station; 102, sandblasting station; 103, unloading station; 104, detection station; 2, turntable; 3, horizontal cross; 4, lifting cylinder; 5, adapter rod; 6, rotary motor; 7, ... 8. Top cover; 9. Base plate; 10. Top cylinder; 11. Base block; 12. Inclined surface one; 13. Guide rod; 14. Clamping block; 15. Guide block; 16. Inclined surface two; 17. Mounting slot; 18. Camera; 19. Lifting cylinder; 10. Lifting frame; 1001. Base platform; 11. Connecting block; 12. Positioning post; 13. Adapter ring; 24. Sandblasting machine; 25. Drive cylinder; 26. Positioning pin; 27. Lifting rod; 28. Arc-segment rail groove; 29. ​​Spray gun; 20. Arc-segment rotating block; 20. Rotating rod; 21. Connecting rod. Detailed Implementation

[0026] As shown in Figures 1 to 4, the present invention provides a sandblasting cleaning device for the inner wall of a drum, which mainly consists of a horizontal support platform 1, a turntable 2, a horizontal crossbar 3, four upper shell covers 7, and supporting mechanisms for four workstations. The turntable 2 is located at the center of the horizontal support platform 1 and is driven by a drive mechanism to rotate intermittently. The horizontal crossbar 3 is installed above the drive end of the turntable 2 via a lifting cylinder 4. Each of the four ends of the horizontal crossbar 3 is connected to a rotary motor 6 via a transition rod 5. The drive end of the rotary motor 6 is connected downward to an upper shell cover 7 via the transition rod 5. The upper shell cover 7 is provided with a drum clamping mechanism for synchronously clamping the drum from the outer wall of the drum. The horizontal support platform 1 has four docking holes corresponding to the movement trajectories of the four upper shell covers 7. The four docking holes respectively constitute a loading workstation 101, a sandblasting workstation 102, a unloading workstation 103, and a detection workstation 104.

[0027] Thus, a core multi-station collaborative operation framework was constructed. By driving the horizontal cross 3 to rotate intermittently through turntable 2, the four stations can operate in parallel, completely overlapping the non-productive loading and unloading and inspection times with the core sandblasting and cleaning time. This fundamentally eliminates the waiting time between processes, realizes near-continuous assembly line production, and significantly improves equipment utilization and overall production efficiency.

[0028] The roller clamping mechanism includes a base plate 8, multiple base blocks 10, and multiple positioning groups. The base plate 8 is vertically and flexibly disposed inside the upper shell cover 7 via a top cylinder 9. Multiple base blocks 10 are uniformly fixed around the periphery of the base plate 8, and each base block 10 has a first inclined surface 1001 at its bottom. Multiple positioning groups are uniformly disposed around the upper shell cover 7. Each positioning group includes a horizontally movable guide rod 11, a clamping block 12 connected to the inner end of the guide rod 11, and a guide block 13 connected to the outer end of the guide rod 11. The guide block 13 has a second inclined surface 1301 that slides and engages with the first inclined surface 1001. The top cylinder 9 drives the base plate 8 to move up and down. Through the engagement of the first inclined surface 1001 and the second inclined surface 1301, the vertical movement of the base plate 8 is converted into the horizontal radial movement of the guide rod 11, thereby driving all clamping blocks 12 to move closer or further away synchronously to clamp or release the roller.

[0029] This provides an innovative multi-point synchronous radial clamping solution. The base plate 8 is raised and lowered by the top cylinder 9, and the vertical motion is converted into the horizontal radial motion of the clamping blocks 12 using an inclined plane, achieving synchronous opening and closing of all clamping blocks 12. This design ensures that the clamping force is evenly distributed across the entire circumference of the drum's outer wall, avoiding localized stress concentration and indentation damage that may occur with traditional chucks. It is particularly suitable for cleaning applications requiring high-speed rotation, offering extremely high clamping stability.

[0030] The inclined surface 1001 is provided with a T-shaped guide rail, and the inclined surface 1301 is provided with a T-shaped guide groove that slides with the T-shaped guide rail.

[0031] Thus, by setting a T-shaped guide rail and a T-shaped guide groove for sliding engagement on the inclined plane, precise guidance and limiting are provided for the inclined plane transmission mechanism. This effectively prevents the guide block 13 from shifting or disengaging under force, ensuring the smoothness and reliability of power transmission, making the clamping action more precise and smooth, reducing wear on the mechanism, and extending its service life.

[0032] The number of clamping blocks 12 is eight sets, which are evenly distributed along the circumference.

[0033] Thus, the number of clamping blocks 12 is defined as eight groups, evenly distributed along the circumference, further optimizing the clamping effect. More clamping points mean a finer and more uniform distribution of clamping force, thereby reducing the clamping force required for a single clamping block 12 while ensuring sufficient clamping force, minimizing potential damage to the outer wall of the roller, and is especially suitable for rollers with high surface finish requirements.

[0034] A lifting mechanism is provided at each of the loading station 101 and the unloading station 103. The lifting mechanism includes a lifting cylinder 16 and a lifting frame 17. The lifting cylinder 16 is installed on the horizontal support platform 1. The lifting frame 17 is connected to the drive end of the lifting cylinder 16 and is used to carry and lift the roller through the docking hole to enter or exit the upper shell cover 7.

[0035] This achieves automated loading and unloading of the rollers. Through the cooperation of the lifting cylinder 16 and the lifting frame 17, the rollers can be automatically lifted from below the horizontal support platform 1 to the clamping position or removed from the clamping position and sent to the unloading position, replacing inefficient and heavy manual operation. This is a key link in achieving full-process automation and significantly reduces labor intensity.

[0036] The lifting frame 17 includes a base platform 1701 and a docking block 1702 mounted on the base platform 1701 for docking with the docking hole. The docking block 1702 has a conical positioning post 18 at its center for aligning with the roller port.

[0037] At this point, the conical positioning pin 18 on the lifting frame 17 serves as the initial centering point. During the process of the roller being lifted into the upper cover 7, the positioning pin 18 automatically guides the roller port to center, ensuring that the roller axis is substantially aligned with the rotation axis of the clamping mechanism. This not only improves the accuracy and efficiency of clamping but also lays the foundation for the subsequent smooth rotation of the roller.

[0038] The sandblasting station 102 has a connecting ring 19 inside the docking hole. The top of the connecting ring 19 is pressed against the bottom of the lowered upper cover 7 to form a seal, and can be rotated by the upper cover 7. The top of a sandblasting machine 21 is pressed against the horizontal support 1 and surrounds the bottom outer ring of the connecting ring 19. Below the docking hole of the inspection station 104, there is a set of mounting grooves 14 installed on the bottom side of the horizontal support 1. A set of cameras 15 for taking pictures to detect whether there is any abnormality in the material feeding or other abnormal conditions inside the upper cover 7.

[0039] Thus, a crucial pressure-sealing environment was created at the sandblasting station 102. The adapter ring 19, serving as the connector between the upper cover 7 and the sandblasting machine 21, allows the upper cover 7 to drive the roller to rotate freely while simultaneously forming an effective seal, preventing abrasive and dust leakage during sandblasting and ensuring a clean and environmentally friendly working environment. Simultaneously, a camera 15 is installed at the inspection station 104 to monitor in real time whether the material feeding is successful or if any other abnormalities exist, achieving process quality control and equipment status monitoring, and improving the system's intelligence and reliability.

[0040] The bottom of the upper cover 7 is provided with a positioning groove, and the top of the adapter ring 19 is provided with a positioning pin 23 that is inserted into the positioning groove.

[0041] Thus, through the insertion and engagement of the positioning groove and the positioning pin 23, circumferential positioning between the upper cover 7 and the adapter ring 19 is achieved. This not only enables more reliable torque transmission and drives the adapter ring 19 to rotate accordingly, reducing wear caused by pure friction drive, but also enhances the stability and sealing effect of the connection between the two.

[0042] The sandblasting machine 21 is equipped with a spray gun 26 angle adjustment mechanism, including a lifting rod 24, an arc-shaped track groove 25, a spray gun 26, a rotating rod 28, and a connecting rod 29. The lifting rod 24 is driven by a drive cylinder 22 and can be raised and lowered vertically. The arc-shaped track groove 25 is installed at the end of the lifting rod 24. The gripping end of the spray gun 26 is rotatably positioned in the arc-shaped track groove 25 via an arc-shaped rotating block 27. The rotating rod 28 is rotatably installed at the center of the arc segment of the arc-shaped track groove 25 and is driven to rotate by a drive motor. One end of the connecting rod 29 is fixed to the arc-shaped rotating block 27, and the other end is fixed to the rotating rod 28. When the drive motor drives the rotating rod 28 to rotate, the connecting rod 29 can drive the arc-shaped rotating block 27 and the spray gun 26 to change the spray angle along the arc-shaped track groove 25.

[0043] This provides high-precision adjustment capability for the angle and height of the spray gun 26. The vertical position of the spray gun 26 is controlled by the lifting rod 24, and the spray angle of the spray gun 26 is changed by the connecting rod 29 mechanism. This allows the abrasive flow to accurately cover different areas of the inner wall of the drum, ensuring thorough cleaning without dead angles. This achieves comprehensive, uniform, and efficient cleaning of the inner wall of the drum, adapting to drums of different sizes and levels of contamination.

[0044] Example 2: A method for sandblasting the inner wall of a drum. In this example, it is based on a sandblasting cleaning device for the inner wall of a drum according to Example 1, and includes the following steps: S1, Loading: The turntable 2 is stationary, and the lifting mechanism of the loading station 101 sends the drum to be cleaned into the corresponding upper shell cover 7. After the clamping mechanism clamps the drum, the lifting mechanism descends; S2, Rotation: The turntable 2 drives the horizontal cross 3 and all upper shell covers 7 to rotate 90°, so that the drums at each station move to the next station; S3, Sandblasting cleaning: Located at the sandblasting station 1 S2. The upper cover 7 descends and presses against the adapter ring 19 to form a seal. The rotary motor 6 drives the upper cover 7 and the drum to rotate. The spray gun 26 in the sandblasting machine 21 sandblasts and cleans the inner wall of the drum. S4. Unloading and inspection: After cleaning, the turntable 2 rotates 90° again. The cleaned drum moves to the unloading station 103 and is picked up by the lifting mechanism. At the same time, the newly loaded drum enters the sandblasting station 102. The unloaded upper cover 7 is monitored in the inspection station 104. Repeat steps S1 to S4 to achieve continuous cycle operation.

[0045] Thus, a continuous cleaning method based on this device is defined. This method integrates the features of the aforementioned devices into an organic, cyclical work process, systematically illustrating the entire process from automatic feeding, precise positioning and clamping, multi-station operation, sandblasting cleaning to automatic unloading and inspection. This method allows the four stations to operate in parallel without conflict, transforming the high-efficiency, automated, and high-quality cleaning capabilities of the device of this invention into actual productivity.

[0046] The working principle of this invention is as follows: The workflow of this device is as follows: S1. Initial state: The turntable 2 is stationary, and the four upper shell covers 7 are aligned with the four workstations respectively; S2. Loading: The lifting cylinder 16 located at the loading workstation 101 drives the lifting frame 17 to rise. The roller to be cleaned is sent by the conveying equipment to the docking block 1702 of the lifting frame 17, and is initially aligned by the positioning column 18. After the roller passes through the docking hole and enters the interior of the upper shell cover 7, the top cylinder 9 is activated, driving the base plate 8 to press down. Through the inclined plane mechanism, all clamping blocks 12 move inward synchronously to clamp the outer wall of the roller. Then the lifting mechanism descends; S3. Rotation and cleaning: The turntable 2 rotates 90°, so that the roller that has just been clamped is moved to the sandblasting workstation 102. At the same time, the roller in the original sandblasting workstation is moved to the unloading workstation 103, the empty upper shell cover in the original unloading workstation is moved to the inspection workstation 104, and the empty upper shell cover in the original inspection workstation is moved to the loading workstation 101 to prepare for receiving. S4. Sandblasting: At the sandblasting station 102, the lifting cylinder 4 drives the entire horizontal cross 3 to descend, so that the positioning groove at the bottom of the upper cover 7 is inserted into the positioning pin 23 on the adapter ring 19 and pressed to seal. The rotary motor 6 starts, driving the upper cover 7 and the clamped roller to rotate. The sandblasting machine 21 starts, and compressed air drives the abrasive, such as diamond, to be sprayed out from the spray gun 26. By controlling the lifting rod 24 and the rotation of the rotating rod 28, the height and angle of the spray gun 26 can be adjusted to ensure that the abrasive can cover the entire inner wall of the roller and remove paint impurities. S5. Unloading and circulation: After cleaning, the turntable 2 rotates 90° again, and the cleaned roller is moved to the unloading station 103. The top cylinder 9 of this station moves in the opposite direction, the clamping block 12 releases the roller, the lifting mechanism rises, supports the roller and lowers it below the horizontal support platform 1, and is transported away by the unloading equipment. The system repeats this cycle to achieve continuous automated cleaning.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. 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 sandblasting cleaning device for the inner wall of a drum, characterized in that, include: A horizontal support platform (1); a turntable (2) is set at the center of the horizontal support platform (1) and can rotate intermittently by a drive mechanism; a horizontal cross (3) is installed above the drive end of the turntable (2) by a lifting cylinder (4), and each of the four ends of the horizontal cross (3) is connected to a rotary motor (6) by a transition rod (5), and the drive end of the rotary motor (6) is connected downward to an upper shell cover (7) by the transition rod (5); a roller clamping mechanism is provided inside the upper shell cover (7) for synchronously clamping the roller from the outer wall of the roller; four docking holes are opened on the horizontal support platform (1) corresponding to the movement trajectory of the four upper shell covers (7), and the four docking holes respectively constitute the loading station (101), the sandblasting station (102), the unloading station (103) and the inspection station (104).

2. The sandblasting cleaning device for the inner wall of a drum according to claim 1, characterized in that, The roller clamping mechanism includes: a base plate (8), which is vertically and flexibly disposed inside the upper shell cover (7) via a top cylinder (9); multiple base blocks (10), which are uniformly fixed around the periphery of the base plate (8) in the circumferential direction, and each base block (10) has a slope (1001) at its bottom; and multiple positioning groups, which are uniformly disposed around the upper shell cover (7) in the circumferential direction, each positioning group including a horizontally movable guide rod (11), a clamping block (12) connected to the inner end of the guide rod (11), and a clamping block (12). A guide block (13) is connected to the outer end of the guide rod (11). The guide block (13) is provided with a second inclined surface (1301) that slides with the first inclined surface (1001). The top cylinder (9) drives the base plate (8) to rise and fall. Through the cooperation of the first inclined surface (1001) and the second inclined surface (1301), the vertical movement of the base plate (8) is converted into the horizontal radial movement of the guide rod (11), thereby driving all the clamping blocks (12) to move closer or further away synchronously to clamp or release the roller.

3. The sandblasting cleaning device for the inner wall of a drum according to claim 2, characterized in that, The inclined surface one (1001) is provided with a T-shaped guide rail, and the inclined surface two (1301) is provided with a T-shaped guide groove that slides with the T-shaped guide rail.

4. The sandblasting cleaning device for the inner wall of a drum according to claim 2, characterized in that, The number of clamping blocks (12) is eight or more, and they are evenly distributed along the circumference.

5. The sandblasting cleaning device for the inner wall of a drum according to claim 1, characterized in that, A lifting mechanism is provided at each of the loading station (101) and the unloading station (103). The lifting mechanism includes: a lifting cylinder (16) installed on the horizontal support platform (1); and a lifting frame (17) connected to the drive end of the lifting cylinder (16) for carrying and lifting the roller through the docking hole to enter or exit the upper shell cover (7).

6. The sandblasting cleaning device for the inner wall of a drum according to claim 5, characterized in that, The lifting frame (17) includes a base (1701) and a docking block (1702) mounted on the base (1701) for docking with the docking hole. The docking block (1702) has a conical positioning post (18) at its center for aligning with the roller port.

7. The sandblasting cleaning device for the inner wall of a drum according to claim 1, characterized in that, The sandblasting station (102) has a connecting ring (19) in the docking hole. The top of the connecting ring (19) is pressed against the bottom of the lowered upper cover (7) and can be rotated by the upper cover (7). The top of a sandblasting machine (21) is pressed against the horizontal support (1) and surrounds the bottom outer ring of the connecting ring (19). The detection station (104) has a set of mounting grooves (14) installed on the bottom side of the horizontal support (1) below the docking hole. A set of cameras (15) for taking pictures to detect whether there is a material feeding abnormality or other abnormal conditions in the upper cover (7) is installed in the mounting groove (14).

8. The sandblasting cleaning device for the inner wall of a drum according to claim 7, characterized in that, The bottom of the upper cover (7) is provided with a positioning groove, and the top of the adapter ring (19) is provided with a positioning pin (23) that is inserted into the positioning groove.

9. A sandblasting cleaning device for the inner wall of a drum according to claim 7, characterized in that, The sandblasting machine (21) is equipped with a spray gun angle adjustment mechanism, including: a lifting rod (24), which is driven by a drive cylinder (22) to be vertically raised and lowered; an arc-shaped rail groove (25), which is installed at the end of the lifting rod (24); a spray gun (26), whose holding end is rotatably arranged in the arc-shaped rail groove (25) through an arc-shaped rotating block (27); a rotating rod (28), which is rotatably installed at the center of the arc of the arc-shaped rail groove (25) and is driven to rotate by a drive motor; and a connecting rod (29), one end of which is fixed to the arc-shaped rotating block (27) and the other end of which is fixed to the rotating rod (28); wherein, by driving the rotating rod (28) to rotate, the arc-shaped rotating block (27) and the spray gun (26) can be driven by the connecting rod (29) to change the spray angle along the arc-shaped rail groove (25).

10. A method for sandblasting the inner wall of a drum, based on the sandblasting cleaning apparatus for the inner wall of a drum according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Loading: The turntable (2) is stationary. The lifting mechanism of the loading station (101) sends the roller to be cleaned into the corresponding upper cover (7). After the clamping mechanism clamps the roller, the lifting mechanism descends. S2. Rotation: The turntable (2) drives the horizontal cross (3) and all upper covers (7) to rotate 90°, so that the rollers of each station move to the next station. S3. Sandblasting: The upper cover (7) located at the sandblasting station (102) descends and presses against the adapter ring (19) to form a seal. The rotating motor... (6) Drive the upper shell cover (7) and the drum to rotate, and the spray gun (26) in the sandblasting machine (21) performs sandblasting cleaning on the inner wall of the drum; S4, unloading and inspection: After cleaning, the turntable (2) rotates 90° again, and the cleaned drum is moved to the unloading station (103) and the lifting mechanism picks up the unloaded material; at the same time, the newly loaded drum enters the sandblasting station (102), and the unloaded upper shell cover (7) is monitored in the inspection station (104); repeat steps S1 to S4 to achieve continuous cycle operation.

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