Grinding device and control method thereof

Abstract

The invention relates to a grinding device and a control method thereof, and the grinding device comprises a mounting seat; the cylinder body is arranged on the mounting seat and can pivot around a first axis between a first station assembly and a second station assembly; wherein the barrel is ground at the first station, and is unloaded at the second station; the hopper is detachably arranged at the opening of the barrel, and one end of the hopper selectively communicates with an air inlet channel; and when the barrel is located at the second station for discharging, high-pressure gas is introduced into the gas inlet channel so as to pressurize the inner space of the barrel. In this way, the discharging speed can be increased through the grinding device.

Description

Technical Field

[0001] This application relates to the field of industrial grinding technology, and in particular to a grinding device and its control method. Background Technology

[0002] Wet mills typically grind a mixture of slurry and material to be ground by rotating it inside a drum. After grinding, the slurry needs to be separated and poured out.

[0003] Because the slurry is a mixture of grinding particles and solvent, its high viscosity makes unloading difficult.

[0004] Therefore, it is necessary to improve this to increase the discharge speed of the grinding slurry. Summary of the Invention

[0005] The purpose of this application is to provide a grinding device and its control method, which aims to provide a solution that can improve the unloading speed.

[0006] One solution proposed in this application is:

[0007] A grinding apparatus includes: a mounting base; a cylindrical body disposed on the mounting base and pivotable about a first axis in a first station and a second station assembly; wherein the cylindrical body performs grinding at the first station and unloads material at the second station; and a hopper detachably disposed at the opening of the cylindrical body, one end of the hopper being selectively connected to an air inlet passage; wherein, when the cylindrical body is unloading material at the second station, high-pressure gas is introduced into the air inlet passage to pressurize the internal space of the cylindrical body.

[0008] In one embodiment of this application, a first valve and a controller are further included. The first valve is located in the air intake passage and is electrically connected to the controller. The controller is configured to control the first valve to open in response to the cylinder being located in the second working position, such that one end of the air intake passage communicates with the internal space of the cylinder.

[0009] In one embodiment of this application, a first driving member is further included. The first driving member is disposed on the mounting base and is drively connected to the cylinder body for driving the cylinder body to rotate about a second axis. The first driving member is electrically connected to the controller, which is configured to control the first driving member to drive the cylinder body to rotate in both directions in response to the cylinder body being located at the second working position.

[0010] In one embodiment of this application, a liquid inlet passage is further included, one end of which is selectively connected to the hopper. When the cylinder is unloading at the first station, the liquid inlet passage is circulated with solvent to flush the internal space of the cylinder.

[0011] In one embodiment of this application, a second valve is further included, which is disposed on the liquid inlet passage and electrically connected to the controller. The controller is configured to control the first valve to close and the second valve to open in response to the cylinder being located at the first working position, such that one end of the liquid inlet passage communicates with the internal space of the cylinder.

[0012] In one embodiment of this application, a first driving member is further included. The first driving member is disposed on the mounting base and is drively connected to the cylinder body for driving the cylinder body to rotate about a second axis. The first driving member is electrically connected to the controller, which is configured to control the first driving member to drive the cylinder body to rotate in both directions in response to the cylinder body being located at the first working position.

[0013] In one embodiment of this application, at least one of the first valve and the second valve is an automatic reset valve, which is disposed on the mounting base and located during the stroke of the cylinder when switching between the first station and the second station.

[0014] In one embodiment of this application, a rotary joint is further included, wherein the air inlet passage and the liquid inlet passage are detachably connected to the opening of the cylinder through the rotary joint, wherein the rotary joint and the cylinder are rotary sealed.

[0015] In one embodiment of this application, a grid is also included, which is disposed at the opening of the cylinder and adjacent to the hopper.

[0016] In one embodiment of this application, a feed pipe is further included, which is shared by the air inlet passage and the liquid inlet passage. The feed pipe is connected to the internal space of the cylinder through the rotary joint. The feed pipe extends from the rotary joint toward the grid and is close to the grid, such that a portion of the feed pipe overlaps with the grid.

[0017] In one embodiment of this application, a discharge pipe is further included. The discharge pipe is connected to the cylinder through the rotary joint and is disposed away from the feed pipe, so that the discharge pipe does not overlap with the grid.

[0018] Another solution proposed in this application is:

[0019] A method for controlling a grinding apparatus includes: generating a reminder signal for hopper replacement in response to the completion of grinding in a first station; controlling the cylinder to switch from the first station to a second station after detecting that the hopper replacement has been completed; and introducing high-pressure gas into the interior of the cylinder through an air intake passage when the cylinder is in the second station.

[0020] In one embodiment of this application, the step of introducing high-pressure gas into the cylinder through the air inlet passage when the cylinder is located in the second working position includes: in response to the cylinder being located in the second working position, controlling the first valve to open, so that one end of the air inlet passage is connected to the internal space of the cylinder.

[0021] In one embodiment of this application, the step of controlling the first valve to open in response to the cylinder being located at the second working position includes: controlling the first driving member to drive the cylinder to rotate forward and backward in response to the cylinder being located at the second working position.

[0022] In one embodiment of this application, the method further includes: detecting that the cylinder has completed unloading at the second station, controlling the cylinder to switch from the second station to the first station; when the cylinder is unloading at the first station, introducing solvent into the inside of the cylinder through the liquid inlet passage.

[0023] In one embodiment of this application, the step of introducing solvent into the cylinder through the liquid inlet passage when the cylinder is unloading at the first station includes: controlling the first valve to close and the second valve to open in response to the cylinder being at the first station, so that one end of the liquid inlet passage is connected to the internal space of the cylinder.

[0024] In one embodiment of this application, the step of controlling the first valve to close and the second valve to open in response to the cylinder being located at the first work position includes: controlling the first drive member to drive the cylinder to rotate forward and backward in response to the cylinder being located at the first work position.

[0025] This application provides a grinding device and its control method. The grinding device accelerates the unloading speed by introducing high-pressure gas; further, it can rinse the cylinder by introducing liquid; and even further, by combining the forward and reverse rotation of the cylinder during the unloading and rinsing process, the unloading and maintenance speed of the device is further improved. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the grinding apparatus provided in the embodiments of this application at the first station;

[0028] Figure 2This is a schematic diagram of the grinding apparatus provided in the embodiments of this application at the second station;

[0029] Figure 3 This is a schematic diagram of the second station of a grinding apparatus provided in another embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the second station of the grinding apparatus provided in another embodiment of this application;

[0031] Figure 5 yes Figure 4 Another perspective view of the grinding apparatus provided in the embodiment;

[0032] Figure 6 This is a flowchart illustrating the control method of the grinding apparatus provided in the embodiments of this application. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly fixed to or set on that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent. The terms "first" and "second" are used only for the purpose of description and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly specified.

[0035] To illustrate the technical solutions described in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0036] Please see Figures 1 to 5The grinding apparatus 100 of this application may include a mounting base 110 and a cylinder 120 disposed on the mounting base 110. The cylinder 120 can be driven to perform grinding at a first station 10 and to unload at a second station 20. The cylinder 120 has an opening, which is sealed by a pressure cap 112 during grinding at the first station 10. During unloading at the second station 20, the pressure cap 112 is opened, exposing the opening of the cylinder 120, and a hopper 150 is installed at the opening, allowing the grinding slurry to be poured out from the opening. When the cylinder 120 is in the first station 10, its own axis 121 is parallel to the horizontal direction, so that during grinding, the slurry and the workpiece are fully rubbed together by gravity, improving grinding efficiency. When the cylinder 120 is in the second station 20, the angle between the cylinder 120's own axis (i.e., the second axis 121) and the horizontal direction is approximately 45°, allowing the grinding slurry to flow out from the opening by its own gravity.

[0037] One end of the cylinder 120 is mounted on the mounting base 110 via a pivot shaft, and the other end can pivot around this pivot shaft (the central axis of which is the first axis 122). The cylinder 120 can pivot between the first station 10 and the second station 20 around the first axis 122 by means of a second driving member 170. The second driving member 170 can be a telescopic cylinder or a hydraulic cylinder, one end of which is fixed to the mounting base 110, and the other end is rotatably connected to the outer wall of the cylinder 120. The first driving member 130 can extend or retract its own length, adjusting the angle between the cylinder 120's own axis 121 and the horizontal direction, thereby switching between the first station 10 and the second station 20.

[0038] refer to Figures 3-6 In the grinding apparatus 100 of this application, one end of the hopper 150 is detachably connected to the opening of the cylinder 120, and the other end is selectively connected to an air inlet passage 161. When the cylinder 120 is in the second station 20 for unloading, high-pressure gas is introduced into the air inlet passage 161, allowing the high-pressure gas to enter the interior of the cylinder 120 and pressurize the interior of the cylinder 120. This causes the grinding slurry inside the cylinder 120 to be squeezed out by the increased air pressure, thereby increasing the unloading speed of the slurry. The high pressure referred to in this application is a pressure greater than standard atmospheric pressure after the gas is compressed, generally between 5 and 10 atmospheres.

[0039] Furthermore, the air intake passage 161 can be connected to an external high-pressure gas cylinder, or a high-pressure air source can be provided by an air pump compressing air. A first valve 165 can be installed on the air intake passage 161, which can control the opening and closing of the air intake passage 161, thereby connecting the air intake passage 161 with the internal space of the cylinder 120. The first valve 165 can be electrically connected to a controller 170, which controls the opening state of the first valve 165 according to the working state of the cylinder 120. For example, if the controller 170 detects that the cylinder 120 is in the first station 10 and is in the grinding state, the controller 170 controls the first valve 165 to close to prevent gas from entering the cylinder 120 during grinding and affecting the grinding effect; if the controller 170 detects that the cylinder 120 is in the second station 20 and is in the unloading state, the controller 170 controls the first valve 165 to open, allowing high-pressure gas to enter the air intake passage 161 to assist in unloading.

[0040] The gas introduced through the air inlet passage 161 is typically air. In other embodiments, nitrogen may be introduced to avoid the effects of solvent evaporation in the grinding slurry. It is understood that those skilled in the art can choose according to the actual situation.

[0041] Because the slurry has a certain viscosity, simple pressurized discharge may not completely remove the material. Therefore, the grinding device 100 in this application also includes a first driving member 130, which is mounted on the mounting base 110 and connected to the cylinder 120 for driving the cylinder 120 to rotate around the second axis 121. The first driving member 130 is electrically connected to a controller 170, which is configured to control the first driving member 130 to drive the cylinder 120 in both forward and reverse rotation when the cylinder 120 is in the second position 20 for unloading. By driving the cylinder 120 in both forward and reverse rotation, the grinding slurry can change its center of gravity with the help of the cylinder 120, thus facilitating separation from the inner wall of the cylinder 120 and finally discharge from the opening, improving the unloading effect and reducing subsequent maintenance costs of the cylinder 120.

[0042] The first driving component 130 can be a drive motor. The outer circumference of the cylinder 120 can have a gear 132, and both ends of the cylinder 120 can be supported on the mounting base 110 by bearings 111. The cylinder 120 is connected to the power output shaft 131 of the drive motor via the gear 132, thereby enabling the cylinder 120 to rotate around the second axis 121 under the drive of the first driving component 130. The drive motor can control the rotation direction according to different power directions, thus controlling whether the cylinder 120 rotates forward or backward.

[0043] After the cylinder 120 is unloaded at the second station 20, it needs to undergo further self-cleaning maintenance. The grinding device 100 in this application may also include a liquid inlet passage 166, one end of which is selectively connected to the hopper 150, and the other end can be connected to a solvent tank (not shown). After the liquid inlet passage 166 is connected to the cylinder 120, the cylinder 120 can be switched from the second station 20 to the first station 10 via the second drive component 170. A liquid pump can then pump liquid from the solvent tank into the cylinder 120, thereby diluting or rinsing the inner wall of the cylinder 120 to achieve a self-cleaning effect.

[0044] To achieve automatic control, a second valve 167 is provided in the liquid inlet passage 166. The second valve 167 is electrically connected to the controller 170. The controller 170 is used to control the second valve 167 to open when the cylinder 120 is in the first station 10, so that the solvent enters the cylinder 120 through the liquid inlet passage 166. At this time, it is necessary to further control the first valve 165 to close to prevent the solvent from flowing back into the air inlet passage 161.

[0045] During the self-cleaning process of the cylinder 120, in order to improve the self-cleaning effect, the controller 170 can also control the first drive component 130 to drive the cylinder 120 to rotate forward and backward around the second axis 121 at the first station 10. This can adjust the rinsing area and ensure that the area of ​​the inner wall of the cylinder 120 can be self-cleaned, thereby improving the self-cleaning effect of rinsing.

[0046] The solvent in the liquid inlet passage 166 of this application can be the same as the solvent of the grinding slurry, such as ethanol, hexane, acetone, etc., or it can be water. Those skilled in the art can choose according to the actual situation, which will not be elaborated here.

[0047] The first valve 165 and the second valve 167 can be configured in various ways, such as ball valves, butterfly valves, or solenoid valves. In another embodiment, at least one of the first valve 165 and the second valve 167 can be an automatic reset valve 168, such as a spring-loaded automatic reset ball valve. This valve 168 can be located in the pivoting path or stroke of the cylinder 120 when switching from the first station 10 to the second station 20. Thus, the characteristics of the automatic reset valve 168 can be used to control the conduction state of the corresponding passage in response to the station position of the cylinder 120. As for the specific structural form of the automatic reset valve 168, this is a conventional choice in the art, and those skilled in the art can select different types of automatic reset valves 168 according to actual conditions, which will not be elaborated here.

[0048] Considering that the cylinder 120 needs to continuously rotate in both directions during the unloading process, in order to prevent the air inlet passage 161 and the liquid inlet passage 166 from becoming entangled, in one embodiment of this application, the grinding device 100 may further include a rotary joint 160. The air inlet passage 161 and the liquid inlet passage 166 are detachably connected to the opening of the cylinder 120 via the rotary joint 160. Thus, when the cylinder 120 rotates, the air inlet passage 161 and the liquid inlet passage 166 can remain stationary by means of the rotary joint 160 rotating with the cylinder 120. Furthermore, considering the sealing performance of the cylinder 120, a rotational seal is formed between the rotary joint 160 and the opening of the cylinder 120 to prevent the leakage of vapor or gas from the evaporation of the slurry solvent. The rotary joint 160 may form a dynamic seal with the opening using a slip ring and a sealing ring; the specific rotational sealing method can be selected by those skilled in the art according to the actual situation.

[0049] The grinding apparatus 100 of this application can be a ball mill, which includes grinding slurry and grinding balls. During unloading, the grinding balls and grinding slurry need to be separated. Therefore, the grinding apparatus 100 can include a grid 151 located at the opening, having multiple screens that allow the slurry to pass through but not the grinding balls, thereby achieving separation of the slurry and grinding balls during unloading to facilitate slurry recycling. The grid 151 is located at the opening and adjacent to the hopper 150, allowing it to be installed together with the hopper 150 at the opening during unloading. In this way, the slurry containing the grinding slurry and grinding balls is first filtered by the grid 151 during unloading, then the grinding balls remain inside the cylinder 120, while the grinding slurry is discharged from the opening through the hopper 150.

[0050] To save on piping layout, the grinding apparatus 100 of this application may include a feed pipe 164. The air inlet passage 161 and the liquid inlet passage 166 share a single feed pipe 164. That is, when high-pressure gas or solvent is introduced, it is all conveyed into the cylinder 120 through the feed pipe 164. The feed pipe 164 extends from the rotary joint 160 toward the grid 151, allowing the feed pipe 164 to penetrate sufficiently deep into the interior of the cylinder 120, thus preventing it from being submerged or blocked by slurry when conveying gas or liquid.

[0051] Considering that direct discharge of the grinding slurry would cause splashing or solvent evaporation, in the embodiments of this application, the grinding device 100 may further include a discharge pipe 163. The discharge pipe 163 is also connected to the cylinder 120 through a rotary joint 160, so that the grinding slurry discharged through the hopper 150 can be transported to a designated location through a specific pipe, and no evaporation or splashing will occur during the transportation process. The discharge pipe 163 is positioned away from the feed pipe 164 on the rotary joint 160 to prevent liquid or air from accidentally entering the discharge pipe 163. Specifically, this can be achieved by aligning a portion of the feed pipe 164 with the projected portion of the grid 151 in the same direction, while ensuring that the discharge pipe 163 does not overlap with the projected portion of the grid 151 in the same direction, thus ensuring that the two are staggered in the rotary joint 160.

[0052] Please see Figure 6 This application proposes a method for controlling a grinding apparatus, specifically for controlling the grinding apparatus 100 as described in the foregoing embodiments. Combined with... Figures 1 to 5 The control method includes:

[0053] S1: In response to the completion of grinding of the cylinder at the first station, a reminder signal for changing the hopper is generated.

[0054] In this application, grinding can be completed by a countdown or by other means. An angle sensor can be used to determine whether the cylinder 120 is located at the first station 10 or the second station 20. For example, when located at the first station 10, the second axis 121 of the cylinder 120 is parallel to the horizontal direction, i.e., the horizontal angle is 0°; while when located at the second station 20, the second axis 121 of the cylinder 120 is at a 45° angle to the horizontal clamp. In the gas embodiment, microswitches can be set at the first station 10 and the second station 20 respectively. When the cylinder 120 pivots around the first axis 122 to the corresponding station, the corresponding microswitch triggers a positioning signal.

[0055] After grinding is complete, the pressure cap 112 can automatically open, and a reminder signal can be generated, such as a voice broadcast or an indicator light. Simultaneously, after generating the reminder signal, the system waits for the hopper 150 to be replaced. Only after the hopper 150 has been replaced can the next step be performed. The waiting signal for material replacement can be implemented using a position sensor on the hopper 150, such as a Hall effect sensor or a photoelectric sensor, which will not be elaborated upon here.

[0056] S2: After detecting that the hopper replacement is completed, control the cylinder to switch from the first station to the second station 20;

[0057] Specifically, the detection method can be Hall effect or photoelectric. For example, a magnet is provided on the hopper 150, and a Hall sensor is provided near the outlet of the cylinder 120. Only when the hopper 150 is replaced and located in the correct position, the magnet triggers the Hall sensor, thereby determining that the replacement of the hopper 150 is complete.

[0058] The first driving member 130 drives the cylinder 120 to pivot around the first axis 122, driving the cylinder 120, which is in a horizontal state, to an inclined state to facilitate unloading.

[0059] S3: When the cylinder is in the second working position, high-pressure gas is introduced into the inside of the cylinder through the air inlet passage.

[0060] Specifically, when the cylinder 120 is detected to be in the second station 20, high-pressure gas is introduced into the cylinder 120 through the air inlet passage 161 to assist in the discharge of the grinding slurry, thereby increasing the unloading speed.

[0061] In one embodiment of this application, a first valve 165 is provided in the air intake channel. When high-pressure gas is introduced, the first valve 165 can be opened to open the air intake passage 161. The air intake passage 161 can be connected to an external air source or air pump. After the first valve 165 is opened, high-pressure gas such as air or nitrogen will enter the inside of the cylinder 120, creating a high-pressure state inside the cylinder 120, thereby forcing out the grinding slurry.

[0062] In one embodiment of this application, in order to further improve the discharge speed of the grinding slurry, the cylinder 120 can be controlled to rotate simultaneously during unloading, thereby causing the grinding slurry inside the cylinder 120 to form a spiral vortex. The rotation direction can be the same or alternating forward and reverse directions, and the cylinder 120 can be driven to rotate before unloading and continue until the unloading is completely finished.

[0063] In one embodiment of this application, after unloading, the cylinder 120 needs to be self-cleaned. The cylinder 120 is then switched from the second station 20 to the first station 10 by the first drive component 130. Afterwards, the cylinder 120 can be self-cleaned by introducing solvent into its interior. The connection between the liquid inlet passage 166 and the interior of the cylinder 120 is controlled by opening and closing the second valve 167 on the liquid inlet passage 166.

[0064] For example, after detecting that the cylinder 120 is once again in the first station 10, the second valve 167 is opened, and the liquid inlet passage 166 introduces a liquid such as ethanol, hexane, acetone, or water into the cylinder 120 to clean the inner wall of the cylinder 120. To improve the cleaning effect, the cylinder 120 can be kept rotating under the drive of the first drive member 130, and the rotation direction can be the same or alternating forward and reverse rotation.

[0065] To prevent liquid from flowing back into the air inlet passage 161 when liquid is introduced into the liquid inlet passage 166, the first valve 165 can be closed simultaneously when the second valve 167 is opened. Alternatively, in other embodiments, the first valve 165 and the second valve 167 can be opened together, and the high-pressure air introduced into the air inlet passage 161 will mix with the liquid, creating a high-pressure jet effect. This allows for high-pressure flushing of the inner wall of the cylinder 120, resulting in a better cleaning effect.

[0066] After the cylinder 120 is rinsed, it can be further driven to switch from the first station 10 to the second station 20 for unloading, so as to discharge the residual grinding slurry and finally complete the unloading step of the cylinder 120.

[0067] This application also proposes a computer-readable storage medium storing program data that can be executed to implement the control method of the laser cleaning apparatus as described in the embodiments of this application.

[0068] The methods involved in the embodiments of the grinding and manufacturing control method proposed in this application, when implemented as software functional units and sold or used as independent products, can be stored in a device, such as a computer-readable storage medium.

[0069] Furthermore, the controller 170 in this application may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a microcontroller, an ARM (Acorn RISC Machine) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. Additionally, the controller 170 may also be any conventional processor, controller 170, microcontroller 170, or state machine. The controller 170 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP, and / or any other such configuration.

[0070] Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this invention.

[0071] The aforementioned storage media include: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media that can store program code.

[0072] In summary, the grinding device and its control method proposed in this application accelerate the unloading speed by introducing high-pressure gas; furthermore, the cylinder can be rinsed by introducing liquid; and even further, the unloading and maintenance speed of the device is further improved by combining the forward and reverse rotation of the cylinder during the unloading and rinsing process.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A grinding apparatus, characterized in that, include: Mounting base; A cylindrical body, mounted on the mounting base, is pivotable about a first axis in a first and second workstation assembly; wherein the cylindrical body is ground at the first workstation and unloaded at the second workstation; and A hopper is detachably disposed at the opening of the cylinder, and one end of the hopper is selectively connected to an air inlet passage; When the cylinder is unloading material at the second work station, high-pressure gas is introduced into the air inlet passage to pressurize the internal space of the cylinder.

2. The apparatus according to claim 1, characterized in that, It also includes a first valve and a controller, the first valve being located in the air intake passage and electrically connected to the controller, the controller being configured to control the first valve to open in response to the cylinder being in the second working position, such that one end of the air intake passage is in communication with the internal space of the cylinder.

3. The apparatus according to claim 2, characterized in that, It also includes a first driving component, which is disposed on the mounting base and is connected to the cylinder in a transmission manner, for driving the cylinder to rotate around the second axis; The first drive unit is electrically connected to the controller, which is configured to control the first drive unit to drive the cylinder to rotate forward and backward in response to the cylinder being located at the second working position.

4. The apparatus according to claim 3, characterized in that, It also includes a liquid inlet passage and a second valve. One end of the liquid inlet passage is selectively connected to the hopper. When the cylinder is unloading at the first station, the liquid inlet passage is circulated with solvent to flush the internal space of the cylinder. The second valve is located on the liquid inlet passage and electrically connected to the controller. The controller is configured to close the first valve and open the second valve in response to the cylinder being located at the first working position, so that one end of the liquid inlet passage is connected to the internal space of the cylinder.

5. The apparatus according to claim 4, characterized in that, It also includes a first driving component, which is disposed on the mounting base and is connected to the cylinder in a transmission manner, for driving the cylinder to rotate around the second axis; The first drive unit is electrically connected to the controller, which is configured to control the first drive unit to drive the cylinder to rotate forward and backward in response to the cylinder being located at the first work station.

6. The apparatus according to claim 5, characterized in that, At least one of the first valve and the second valve is an automatic reset valve, which is located on the mounting base and in the stroke of the cylinder when switching between the first station and the second station.

7. The apparatus according to claim 5, characterized in that, It also includes a grid and a feed pipe. The grid is located at the opening of the cylinder and is arranged adjacent to the hopper. The air inlet passage and the liquid inlet passage share the feed pipe, which is connected to the internal space of the cylinder through a rotary joint. The feed pipe extends from the rotary joint toward the grid and is close to the grid, such that a portion of the feed pipe overlaps with the grid.

8. The apparatus according to claim 7, characterized in that, It also includes a discharge pipe, which is connected to the cylinder through the rotary joint and is located away from the feed pipe so that the discharge pipe does not overlap with the grid.

9. A control method for a grinding apparatus, characterized in that, include: In response to the completion of grinding of the cylinder at the first station, a reminder signal for changing the hopper is generated; After detecting that the hopper replacement is completed, control the cylinder to switch from the first station to the second station; and When the cylinder is in the second working position, high-pressure gas is introduced into the cylinder through the air inlet passage.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the control method for the grinding apparatus of claim 9.

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