A cleaning device for magnetic rods

Abstract

The utility model discloses a kind of cleaning device of magnetic rod, it is related to lithium ion battery manufacturing technical field.The cleaning device includes sleeve, solenoid and cleaning ring, the sleeve can be sleeved in magnetic rod;The solenoid is fixedly arranged in the sleeve, and can be with the sleeve and be set on the outer periphery of the magnetic rod, the solenoid can generate first magnetic field, the magnetic rod has second magnetic field, the first magnetic field can offset at least a part of the second magnetic field;The cleaning ring is movably arranged in the sleeve along the axial direction of the sleeve, and the cleaning ring is configured to scrape off impurities on the surface of the magnetic rod.The cleaning device can reduce the difficulty of scraping off magnetic impurities from the surface of the magnetic rod, save manpower, improve the efficiency and effect of cleaning the magnetic rod.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery manufacturing technology, and in particular to a cleaning device for magnetic rods. Background Technology

[0002] During the manufacturing process of electrode material precursors, magnetic impurities may be introduced into the precursors due to insufficient purity of raw materials, impurities generated by mechanical friction, or the incorporation of airborne dust. Therefore, demagnetization of the precursors is necessary. This is typically achieved by inserting a magnetic rod into a demagnetizing device, where the magnetic rod contacts the precursor to adsorb the magnetic impurities.

[0003] Understandably, magnetic rods need to be cleaned of magnetic impurities adsorbed on their surface before reuse. However, due to the magnetic rod's strong attraction to these impurities, they are difficult to remove from the surface, requiring operators to scrape them off bit by bit, which is labor-intensive and inefficient. Utility Model Content

[0004] The purpose of this invention is to provide a cleaning device that reduces the difficulty of scraping magnetic impurities off the surface of a magnetic rod, saves manpower, and improves the efficiency and effectiveness of cleaning the magnetic rod.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A cleaning device for magnetic rods, used to clean impurities from the surface of magnetic rods, comprising:

[0007] A sleeve, which can be fitted onto a magnetic rod;

[0008] An electromagnetic coil is fixedly disposed on the sleeve and can be sleeved on the outer periphery of the magnetic rod along with the sleeve. The electromagnetic coil can generate a first magnetic field, and the magnetic rod has a second magnetic field. The first magnetic field can cancel at least a portion of the second magnetic field.

[0009] A cleaning ring is disposed within the sleeve and is axially movable along the sleeve. The cleaning ring is configured to scrape off impurities from the surface of the magnetic rod.

[0010] As an optional embodiment of the above-mentioned cleaning device, the sleeve includes an outer tube and an inner tube spaced apart within the outer tube, the electromagnetic coil is disposed between the sleeve and the inner tube, and the magnetic rod is disposed within the inner tube.

[0011] As an optional embodiment of the above-mentioned cleaning device, the cleaning device further includes a negative pressure pipe, which is inserted through the sleeve to create a negative pressure inside the sleeve.

[0012] As an optional solution to the above-mentioned cleaning device, the cleaning device further includes a driving assembly, which includes a driving element and a lead screw. Both the driving element and the lead screw are disposed inside the sleeve. The driving element is used to drive the lead screw to rotate. The cleaning ring is provided with a slider, and the lead screw passes through the slider and is threadedly connected to the slider.

[0013] As an optional embodiment of the above-mentioned cleaning device, the cleaning ring includes a ring body and an annular airbag. The annular airbag is disposed on the ring body and sleeved on the magnetic rod. The annular airbag has a first state and a second state. When the annular airbag is in the first state, the annular airbag and the magnetic rod are spaced apart. When the annular airbag is in the second state, the annular airbag abuts against the outer periphery of the magnetic rod.

[0014] As an optional solution for the above-mentioned cleaning device, the ring body is provided with an air pump, which is connected to the annular airbag. The air pump can draw air into or inflate the annular airbag to switch the annular airbag between the first state and the second state.

[0015] As an optional solution to the above-mentioned cleaning device, the sleeve has a first end and a second end. When the ring body is located at the first end, the annular airbag is in the first state. During the process of the ring body moving from the first end to the second end, the annular airbag switches to the second state.

[0016] As an optional solution for the above-mentioned cleaning device, the ring body is provided with an air chamber, and the cleaning ring also includes a piston and a push rod connected to each other. The push rod passes through the ring body, and the piston is slidably disposed in the air chamber to form an inflation / deflation chamber on one side of the piston. The inflation / deflation chamber is connected to the annular airbag through a connecting pipe. When the ring body is located at the first end, the push rod abuts against the sleeve to make the volume of the inflation / deflation chamber reach its maximum value.

[0017] As an alternative to the above-mentioned cleaning device, the cleaning ring further includes an elastic element disposed within the air chamber, the elastic element being configured to drive the piston to move so as to reduce the volume of the filling and discharging chamber.

[0018] As an optional embodiment of the above-mentioned cleaning device, the cleaning device further includes a movable component connected to the sleeve to drive the sleeve to be fitted onto the outer periphery of the magnetic rod to be cleaned.

[0019] The beneficial effects of this utility model are:

[0020] This invention provides a cleaning device for magnetic rods. In this cleaning device, an electromagnetic coil inside the sleeve generates an electromagnetic field similar to the magnetic field of the magnetic rod when energized. By making the direction of the electromagnetic field opposite to the direction of the magnetic field of the magnetic rod, part of the magnetic field of the magnetic rod can be canceled out, thereby weakening the attraction force of the magnetic rod to magnetic impurities on its surface and reducing the difficulty of scraping off the magnetic impurities. At this time, by moving the cleaning ring along the axial direction of the magnetic rod, the cleaning ring can scrape off the magnetic impurities on the surface of the magnetic rod.

[0021] This cleaning device reduces the difficulty of scraping magnetic impurities off the surface of the magnetic rod, saves manpower, and improves the efficiency and effectiveness of cleaning the magnetic rod. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the magnetic rod cleaning device provided by this utility model;

[0023] Figure 2 This is a cross-sectional view of the magnetic rod cleaning device provided by this utility model;

[0024] Figure 3 This is a partial cross-sectional view of the magnetic rod cleaning device provided by this utility model;

[0025] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0026] In the picture:

[0027] 100. Installation plate; 200. Magnetic rod; 300. Cleaning device;

[0028] 1. Sleeve; 11. Outer tube; 12. Inner tube; 13. Negative pressure tube; 14. First end; 15. Second end; 16. Abutment part;

[0029] 2. Electromagnetic coil;

[0030] 3. Cleaning ring; 31. Ring body; 311. Inflation / discharge chamber; 312. Connecting pipe; 32. Slider; 33. Annular airbag; 34. Piston; 35. Push rod; 36. Elastic element;

[0031] 4. Moving parts;

[0032] 5. Drive assembly; 51. Drive component; 52. Lead screw. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0035] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] This embodiment provides a cleaning device for magnetic rods, such as... Figure 1 and Figure 2 As shown, the cleaning device 300 includes a sleeve 1 and an electromagnetic coil 2. One end of the sleeve 1 is open so that it can be fitted onto the magnetic rod 200. The electromagnetic coil 2 is fixedly installed on the sleeve 1 and can be fitted onto the outer periphery of the magnetic rod 200 along with the sleeve 1. The electromagnetic coil 2 can generate a first magnetic field, and the magnetic rod 200 has a second magnetic field. The first magnetic field can cancel out at least a portion of the second magnetic field.

[0039] In this cleaning device 300, the electromagnetic coil 2 inside the sleeve 1 generates an electromagnetic field similar to the magnetic field of the magnetic rod 200 after being energized. By making the direction of the electromagnetic field opposite to the direction of the magnetic field of the magnetic rod 200, a portion of the magnetic field of the magnetic rod 200 can be canceled out, thereby weakening the attraction of the magnetic rod 200 to the magnetic impurities on its surface and reducing the difficulty of scraping off the magnetic impurities. In other words, the operator can easily scrape off the magnetic impurities on the surface of the magnetic rod 200.

[0040] Generally, the directions of the first magnetic field and the second magnetic field are opposite, and there are three situations: one is that the magnetic field strength of the first magnetic field is less than that of the second magnetic field. In this case, the magnetic rod 200 can still attract magnetic impurities, but the attraction force is reduced, making it easier to clean; another is that the magnetic field strength of the first magnetic field is equal to that of the second magnetic field. In this case, the first magnetic field and the second magnetic field cancel each other out, and the magnetic impurities are not subject to the force of the magnetic field, so they can fall off the surface of the magnetic rod 200; and the third is that the magnetic field strength of the first magnetic field is greater than that of the second magnetic field. In this case, the magnetic impurities are attracted by the electromagnetic coil 2 or the sleeve 1. After the electromagnetic coil 2 is de-energized, the magnetic impurities can fall off the electromagnetic coil 2 or the sleeve 1.

[0041] In this embodiment, the magnetic field strength of the first magnetic field is equal to that of the second magnetic field to ensure that magnetic impurities fall off freely and are easy to clean. This cleaning device 300 reduces the difficulty of scraping magnetic impurities off the surface of the magnetic rod 200, saves manpower, and improves the efficiency and effectiveness of cleaning the magnetic rod 200.

[0042] like Figure 2 and Figure 3 As shown, the sleeve 1 includes an outer tube 11 and an inner tube 12 spaced apart within the outer tube 11. An electromagnetic coil 2 is disposed between the sleeve 1 and the inner tube 12, and a magnetic rod 200 is disposed within the inner tube 12. The surface shape of the electromagnetic coil 2 is relatively complex, making it easy for impurities to get stuck and difficult to clean. Therefore, the inner tube 12 separates the electromagnetic coil 2 from the magnetic rod 200. Even if impurities adhere to the inner wall of the inner tube 12, the smoothness of the inner wall reduces the difficulty of cleaning.

[0043] It is understandable that impurities detached from the magnetic rod 200 still exist inside the inner tube 12. Whether the energization of the electromagnetic coil 2 is stopped or the magnetic rod 200 is removed, the magnetic impurities will be re-attracted. To solve this problem, the cleaning device 300 also includes a negative pressure tube 13, which is inserted into the sleeve 1 to create a negative pressure inside the sleeve 1. The negative pressure tube 13 allows gas inside the sleeve 1 to flow towards and enter the negative pressure tube 13. When impurities detach from the magnetic rod 200, they will be discharged from the sleeve 1 along with the gas entering the negative pressure tube 13.

[0044] like Figure 2As shown, the sleeve 1 includes a first end 14 and a second end 15. The first end 14 of the sleeve 1 is designed with an opening, and the magnetic rod 200 enters the sleeve 1 through the opening of the first end 14. When the negative pressure tube 13 is activated, gas enters the sleeve 1 through the opening of the first end 14 and then enters the negative pressure tube 13. To improve the effect of the negative pressure tube 13 in adsorbing impurities in the sleeve 1, the connection position between the negative pressure tube 13 and the sleeve 1 is located between the second end 15 and the electromagnetic coil 2 or between the second end 15 and the magnetic rod 200, so as to ensure that the gas can flow completely through the electromagnetic coil 2 and the magnetic rod 200, thereby sucking away all the impurities in the sleeve 1. To increase the suction force, the second end 15 of the sleeve 1 is not designed with an opening, thereby forming a unidirectional gas flow in the sleeve 1.

[0045] In actual production, the magnetic rod 200 that adsorbs magnetic impurities is usually fixed on the mounting plate 100. To simplify the operation, the mounting plate 100 and the magnetic rod 200 can be transferred together to the cleaning device 300 for cleaning.

[0046] like Figure 1 and Figure 2 As shown, to facilitate the sequential cleaning of the magnetic rods 200 by the cleaning device 300, the cleaning device 300 also includes a movable component 4. The movable component 4 is connected to the sleeve 1 to drive the sleeve 1 to be fitted onto the outer periphery of the magnetic rod 200 to be cleaned. The movable component 4 can move the sleeve 1 so that the sleeve 1 is directly opposite the magnetic rod 200 to be cleaned, and then drive the sleeve 1 closer to the magnetic rod 200 so that the sleeve 1 is fitted onto the magnetic rod 200. This improves cleaning efficiency and reduces the workload of the operator.

[0047] In this embodiment, the cleaning device 300 further includes a cleaning ring 3, which is axially movable within the sleeve 1. The cleaning ring 3 is configured to scrape off impurities from the surface of the magnetic rod 200. When the magnetic rod 200 does not magnetically attract magnetic impurities, some magnetic and non-magnetic impurities may still adhere to the surface of the magnetic rod 200. In this case, the cleaning ring 3 can scrape off these impurities, ensuring the cleanliness of the surface of the magnetic rod 200.

[0048] like Figure 2 and Figure 3As shown, in order to enable the cleaning ring 3 to move along the axial direction of the magnetic rod 200, the cleaning device 300 also includes a drive assembly 5. The drive assembly 5 includes a drive member 51 and a lead screw 52. Both the drive member 51 and the lead screw 52 are disposed within the sleeve 1. The drive member 51 is used to drive the lead screw 52 to rotate. The cleaning ring 3 is provided with a slider 32, and the lead screw 52 passes through the slider 32 and is threadedly connected to the slider 32. It is worth noting that the axial direction of the lead screw 52 is parallel to the axial direction of the magnetic rod 200. When the drive member 51 drives the lead screw 52 to rotate, the slider 32 will move along the axial direction of the lead screw 52 under the drive of the lead screw 52, ​​that is, along the axial direction of the magnetic rod 200, thereby scraping off the impurities on the surface of the magnetic rod 200.

[0049] The driving component 51 can be a rotary motor, which drives the lead screw 52 to rotate, causing the slider 32 to move, thereby driving the cleaning ring 3. On the one hand, the operator can accurately adjust the movement speed of the slider 32 by controlling the rotation speed of the rotary motor; on the other hand, the lead screw 52 can play a deceleration role, so that when the rotary motor rotates at normal speed, the movement speed of the slider 32 is slower, which can ensure the smooth movement of the slider 32 and improve the effect of the slider 32 in scraping off impurities.

[0050] It is understandable that friction between the cleaning ring 3 and the magnetic rod 200 will cause wear on either the magnetic rod 200 or the cleaning ring 3, resulting in an increased gap between them. This reduces the effectiveness of the cleaning ring 3 in scraping off impurities from the surface of the magnetic rod 200. Figures 2-4 As shown, the cleaning ring 3 includes a ring body 31 and an annular airbag 33. The annular airbag 33 is disposed on the ring body 31 and sleeved on the magnetic rod 200. The annular airbag 33 has a first state and a second state. When the annular airbag 33 is in the first state, the annular airbag 33 is spaced apart from the magnetic rod 200. When the annular airbag 33 is in the second state, the annular airbag 33 abuts against the outer periphery of the magnetic rod 200.

[0051] The ring body 31 serves as a support structure, ensuring that the annular airbag 33 does not undergo significant deformation, allowing it to be accurately fitted onto the surface of the magnetic rod 200. When the sleeve 1 is fitted onto the magnetic rod 200, the electromagnetic coil 2 is not energized, resulting in a strong attraction between impurities and the magnetic rod 200. The annular airbag 33 is in its first state, allowing the magnetic rod 200 to pass smoothly through it, preventing impurities attracted by the magnetic rod from scratching the airbag 33 upon contact. Once the magnetic rod 200 is stable within the sleeve 1, the electromagnetic coil 2 is energized, and the annular airbag 33 switches to its second state. In this state, the annular airbag 33 can abut against the outer periphery of the magnetic rod 200 and scrape off impurities from its surface through movement. These impurities are easily scraped off without scratching the annular airbag 33.

[0052] To further improve the service life of the annular airbag 33, a highly wear-resistant material can be selected, or a wear-resistant coating can be applied to the outer surface of the annular airbag 33.

[0053] In some embodiments, the ring body 31 is equipped with an air pump, which is connected to the annular airbag 33. The air pump can draw air from or inflate the annular airbag 33 to switch the annular airbag 33 between a first state and a second state. The state of the annular airbag 33 is controlled by the air pump. When the magnetic rod 200 needs to pass through the annular airbag 33, the air pump draws out the gas inside the annular airbag 33, making the aperture of the annular airbag 33 larger. When it is necessary to scrape off impurities from the surface of the magnetic rod 200, the air pump inflates the annular airbag 33, making the aperture of the annular airbag 33 smaller and abutting against the surface of the magnetic rod 200.

[0054] It is worth noting that when the annular airbag 33 scrapes off impurities from the surface of the magnetic rod 200, it preferably moves towards the second end 15. This facilitates the movement of impurities towards the second end 15 with the airflow, ultimately allowing them to enter the negative pressure tube 13 and be discharged. In other words, the initial position of the cleaning ring 3 is at the first end 14, and at this time, the annular airbag 33 is in the first state. As the annular airbag 33 moves from the first end 14 to the second end 15, the annular airbag 33 switches from the first state to the second state.

[0055] like Figure 3 and Figure 4 As shown, the ring body 31 is provided with an air chamber. The cleaning ring 3 also includes a piston 34 and a push rod 35 connected to each other. The piston 34 is slidably disposed in the air chamber to form an inflation / deflation chamber 311 on one side of the piston 34. The inflation / deflation chamber 311 is connected to the annular airbag 33 through a connecting pipe 312. By driving the piston 34 to move by the push rod 35, the size of the inflation / deflation chamber 311 can be changed, thereby realizing the inflation and deflation of the annular airbag 33. The structure is simple.

[0056] In this embodiment, when the ring body 31 is located at the first end 14, the push rod 35 abuts against the sleeve 1 to maximize the volume of the filling and discharging chamber 311. When the cleaning device 300 is ready to clean the magnetic rod 200, the drive assembly 5 drives the ring body 31 to move to the first end 14 of the sleeve 1. The push rod 35 abuts against the sleeve 1 and drives the piston 34 to move as the ring body 31 moves. The volume of the filling and discharging chamber 311 gradually increases to reduce the gas in the annular airbag 33. The volume of the filling and discharging chamber 311 reaches its maximum value when the ring body 31 moves to the first end 14. At this time, the diameter of the central hole of the annular airbag 33 is larger than the diameter of the magnetic rod 200.

[0057] In order to allow the sleeve 1 to abut against the push rod 35 to change the size of the filling / discharging chamber 311, the sleeve 1 is provided with an abutment portion 16. When the push rod 35 abuts against the grounding portion of the sleeve 1, the push rod 35 and the piston 34 stop moving relative to the sleeve 1. At this time, the movement of the ring body 31 can change the size of the filling / discharging chamber 311. It is worth noting that the position of the ring body 31 is controlled by the drive member 51 and the lead screw 52 to prevent the ring body 31 from hitting the abutment portion 16 and causing damage.

[0058] In this embodiment, the material of the annular airbag 33 has a certain elasticity, and the annular airbag 33 can maintain the second state when the push rod 35 disengages from the abutment part 16. When the magnetic rod 200 enters the sleeve 1 and the electromagnetic coil 2 is energized, the drive assembly 5 drives the ring body 31 to move toward the second end 15 of the sleeve 1. When the push rod 35 disengages from the abutment part 16, the annular airbag 33 switches to the second state to scrape off impurities on the surface of the magnetic rod 200.

[0059] like Figure 4 As shown, the cleaning ring 3 also includes an elastic element 36, which is disposed within the air chamber. The elastic element 36 is configured to drive the piston 34 to move, thereby reducing the volume of the inflation / deflation chamber 311. This structure allows the elastic element 36 to drive the piston 34. When the push rod 35 disengages from the abutment portion 16, the volume of the inflation / deflation chamber 311 decreases, and gas enters the annular airbag 33, causing the annular airbag 33 to switch to a second state. Using the elastic element 36 to drive the piston 34 allows for a wider variety of materials for the annular airbag 33, rather than being limited to materials capable of autonomously returning to their original state.

[0060] In this embodiment, the elastic element 36 is a tension spring, which is disposed in the filling and discharging cavity 311. The tension spring is sleeved on the push rod 35, one end of the tension spring is connected to the piston 34, and the other end of the tension spring is connected to the inner wall of the filling and discharging cavity 311.

[0061] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cleaning device for magnetic rods, used to clean impurities from the surface of a magnetic rod (200), characterized in that, include: Sleeve (1), which can be sleeved on magnetic rod (200); An electromagnetic coil (2) is fixedly disposed on the sleeve (1) and can be sleeved on the outer periphery of the magnetic rod (200) along with the sleeve (1). The electromagnetic coil (2) can generate a first magnetic field, and the magnetic rod (200) has a second magnetic field. The first magnetic field can cancel at least a portion of the second magnetic field. A cleaning ring (3) is disposed within the sleeve (1) and is axially movable along the sleeve (1). The cleaning ring (3) is configured to scrape off impurities from the surface of the magnetic rod (200).

2. The magnetic rod cleaning device according to claim 1, characterized in that, The sleeve (1) includes an outer tube (11) and an inner tube (12) spaced apart within the outer tube (11). The electromagnetic coil (2) is disposed between the sleeve (1) and the inner tube (12), and the magnetic rod (200) is disposed within the inner tube (12).

3. The cleaning device for magnetic rods according to claim 1, characterized in that, The cleaning device also includes a negative pressure pipe (13), which is inserted through the sleeve (1) to create a negative pressure inside the sleeve (1).

4. The cleaning device for magnetic rods according to claim 1, characterized in that, The cleaning device (300) further includes a drive assembly (5), which includes a drive member (51) and a lead screw (52). The drive member (51) and the lead screw (52) are both disposed inside the sleeve (1). The drive member (51) is used to drive the lead screw (52) to rotate. The cleaning ring (3) is provided with a slider (32). The lead screw (52) passes through the slider (32) and is threadedly connected to the slider (32).

5. The cleaning device for magnetic rods according to claim 1, characterized in that, The cleaning ring (3) includes a ring body (31) and an annular airbag (33). The annular airbag (33) is disposed on the ring body (31) and sleeved on the magnetic rod (200). The annular airbag (33) has a first state and a second state. When the annular airbag (33) is in the first state, the annular airbag (33) and the magnetic rod (200) are spaced apart. When the annular airbag (33) is in the second state, the annular airbag (33) abuts against the outer periphery of the magnetic rod (200).

6. The cleaning device for magnetic rods according to claim 5, characterized in that, The ring body (31) is equipped with an air pump, which is connected to the annular airbag (33). The air pump can draw air into or inflate the annular airbag (33) to switch the annular airbag (33) between the first state and the second state.

7. The cleaning device for magnetic rods according to claim 5, characterized in that, The sleeve (1) has a first end (14) and a second end (15). When the ring body (31) is located at the first end (14), the annular airbag (33) is in the first state. During the process of the ring body (31) moving from the first end (14) to the second end (15), the annular airbag (33) switches to the second state.

8. The cleaning device for magnetic rods according to claim 7, characterized in that, The ring body (31) is provided with an air chamber. The cleaning ring (3) also includes a piston (34) and a push rod (35) connected to each other. The push rod (35) passes through the ring body (31). The piston (34) is slidably disposed in the air chamber to form an inflation / deflation chamber (311) on one side of the piston (34). The inflation / deflation chamber (311) is connected to the annular airbag (33) through a connecting pipe (312). When the ring body (31) is located at the first end (14), the push rod (35) abuts against the sleeve (1) so that the volume of the inflation / deflation chamber (311) reaches its maximum value.

9. The cleaning device for magnetic rods according to claim 8, characterized in that, The cleaning ring (3) further includes an elastic element (36) disposed in the air chamber, the elastic element (36) being configured to drive the piston (34) to move so as to reduce the volume of the filling and discharging chamber (311).

10. The cleaning apparatus according to any one of claims 1-9, characterized in that, The cleaning device also includes a movable part (4), which is connected to the sleeve (1) to drive the sleeve (1) to be fitted onto the outer periphery of the magnetic rod (200) to be cleaned.

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