Cleaning device

Abstract

The utility model relates to the technical field of single crystal furnace cleaning, in particular to a cleaning device. The cleaning device is used for cleaning the barrel wall of the barrel and comprises a connecting base and a cleaning panel, the cleaning panel is installed on the periphery, facing the barrel wall, of the connecting base, and in the lifting process of the cleaning device, the cleaning panel can be pushed by friction force applied by the barrel wall to rotate so as to convert the contact face of the cleaning panel and the barrel wall. The cleaning device is mounted on the lifting device, the lifting device for lifting the seed crystal is used for driving the cleaning device to clean the barrel wall of the barrel, and the friction force generated between the barrel wall and the cleaning panel is used for driving the cleaning panel to rotate relative to the connecting seat, so that the contact surface of the cleaning panel and the barrel wall is converted.

Description

Technical Field

[0001] The present application relates to the technical field of single crystal furnace cleaning, and in particular to a cleaning device. Background Art

[0002] Single crystal silicon is a semiconductor material. A single crystal furnace is a device that uses a graphite heater to melt polycrystalline materials such as polysilicon in an inert gas (mainly nitrogen and helium) environment and grows single crystals without dislocation using the Czochralski method.

[0003] The existing vertical pulling single crystal furnace (hereinafter referred to as the single crystal furnace) generally includes a main furnace body, a crucible lifting mechanism, a seed crystal lifting mechanism, a sub-chamber rotating mechanism, a column, a vacuum system, an argon system, a cooling system and a water cooling device. At present, the single crystal furnace adopts the method of multiple feeding and pulling multi-rod single crystals to continuously evacuate the single crystal furnace. The volatiles generated in the single crystal furnace are exhausted through the pipeline into the dust removal tank for deposition and filtration, so as to keep the single crystal furnace clean. However, during the continuous operation of the single crystal furnace, the volatiles will gradually adhere to the inner wall of the furnace, which needs to be cleaned regularly to reduce impurities.

[0004] In the prior art, a straight rod is usually used to set cleaning materials, and the straight rod is manually extended into the auxiliary chamber of the single crystal furnace to clean the inner wall of the furnace. Manual operation is not only time-consuming and laborious, but the cleaning staff also stand in a safety risk position, which is relatively dangerous. Utility Model Content

[0005] The present application provides a cleaning device, which aims to utilize the friction force generated between the cylinder wall and the cleaning panel to drive the cleaning panel to rotate, so that different sides of the cleaning panel can clean the cylinder wall, thereby improving the cleaning effect.

[0006] The present application provides a cleaning device for cleaning the cylinder wall of a cylinder, the cleaning device comprising:

[0007] Connecting seat;

[0008] A cleaning panel is installed on the outer periphery of the connecting seat facing the cylinder wall. During the lifting and lowering process of the cleaning device, the cleaning panel can rotate relative to the connecting seat to convert the contact surface between the cleaning panel and the cylinder wall.

[0009] In a possible design, the cleaning panel includes a cleaning portion, the cleaning portion is provided with a first cleaning area and a second cleaning area, and along the lifting direction of the cleaning device, the first cleaning area is located below the second cleaning area;

[0010] During the descent of the cleaning device, the first cleaning area contacts the barrel wall, and during the ascent of the cleaning device, the second cleaning area contacts the barrel wall.

[0011] In a possible design, the cleaning portion is in an arc shape protruding toward the cylinder wall.

[0012] In a possible design, the cleaning panel further includes a supporting portion, and the supporting portion is connected to the cleaning portion;

[0013] The support portion is provided with a connecting hole, the outer periphery of the connecting seat is provided with a connecting shaft, and the support portion is sleeved on the connecting shaft through the connecting hole.

[0014] In a possible design, the support portion is further provided with a finite surface;

[0015] During the lifting and lowering process of the cleaning device, the limiting surface can abut against the surface of the connecting seat to limit the support portion from further rotating.

[0016] In a possible design, the limiting surface includes a first constraint surface and a second constraint surface;

[0017] The first constraint surface and the second constraint surface are arranged close to the connection seat relative to the connection hole, and along the lifting direction of the cleaning device, the first constraint surface and the second constraint surface are respectively located on both sides of the connection hole;

[0018] During the descent of the cleaning device, the first constraint surface can abut against the surface of the connecting seat, so that the first cleaning area maintains contact with the cylinder wall;

[0019] During the ascending process of the cleaning device, the second constraint surface can abut against the surface of the connecting seat, so that the second cleaning area maintains contact with the cylinder wall.

[0020] In a possible design, the cleaning device further includes a cleaning member;

[0021] The cleaning piece is detachably sleeved on a side of the cleaning portion facing the cylinder wall.

[0022] In a possible design, the cleaning device further includes a clamping member;

[0023] The clamping member is installed on the cleaning panel, and the clamping member can clamp the cleaning member on the cleaning portion.

[0024] In a possible design, the cleaning element includes a dust-free cloth or dust-free paper.

[0025] In a possible design, a fixing portion is provided on the top of the connecting seat, and the fixing portion is used to connect with a lifting device.

[0026] In the present application, the lifting device for lifting the seed crystal drives the cleaning device to clean the cylinder wall of the cylinder, thereby improving the cleaning efficiency. In addition, when the lifting device controls the cleaning device to rise or fall, friction can be generated between the cylinder wall and the cleaning panel, and the friction is used to drive the cleaning panel to rotate, and the contact surface between the cleaning panel and the cylinder wall is changed, so that different sides of the cleaning panel can clean the cylinder wall, thereby improving the cleaning effect.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the cleaning device provided in this application in a working state;

[0029] Figure 2 for Figure 1 A magnified schematic diagram of the middle part;

[0030] Figure 3 This is a schematic diagram of the structure of the cleaning device provided in this application;

[0031] Figure 4 This is a schematic diagram of the structure of the cleaning panel provided in this application;

[0032] Figure 5 for Figure 4 Schematic diagram from another perspective;

[0033] Figure 6 A schematic diagram of the connection between the cleaning member and the cleaning panel;

[0034] Figure 7 This is a schematic diagram of the structure of the card connector provided in this application;

[0035] Figure 8 This is a schematic diagram of the structure of the connecting socket provided in this application.

[0036] Reference numerals:

[0037] 1- Cleaning device;

[0038] 11-connection seat;

[0039] 111-connecting shaft;

[0040] 111a-connecting part;

[0041] 112-fixed part;

[0042] 12- Clean the panel;

[0043] 121-Cleaning Department;

[0044] 121a - first cleaning area;

[0045] 121b - Second clean area;

[0046] 122-supporting part;

[0047] 122a-connection hole;

[0048] 122b-first constraint surface;

[0049] 122c-second constraint surface;

[0050] 13- Cleaning parts;

[0051] 14-card connector;

[0052] 141-installation part;

[0053] 142- elastic part;

[0054] 143- socket connection portion;

[0055] 2-furnace drum;

[0056] 21-cylinder wall;

[0057] 3-Lifting device.

[0058] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0059] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0060] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0061] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0062] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0063] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0064] The single crystal furnace generally includes the main furnace body, crucible, lifting mechanism, heater, etc. The basic principle of crystal pulling is that the raw material is placed in the crucible, and there is a lifting device above the crucible. The seed crystal is fixed at the lower end of the lifting device. After the raw material is melted by the heater, the seed crystal is inserted into the melt, and the appropriate temperature is controlled to reach the supersaturation temperature. The crystal is pulled while rotating to obtain the required single crystal silicon rod.

[0065] At present, the single crystal furnace adopts the method of multiple re-feeding to pull multiple rod single crystals, and continuously evacuates the single crystal furnace. The volatiles generated in the single crystal furnace are exhausted through the pipeline into the dust removal tank for deposition and filtration, so as to keep the single crystal furnace clean.

[0066] During the continuous operation of the single crystal furnace, volatiles will gradually adhere to the inner wall of the furnace barrel, which needs to be cleaned regularly to reduce impurities. Specifically, during the operation of the single crystal furnace, multiple single crystal silicon rods will be continuously produced. After pulling a single crystal silicon rod, the inner wall of the furnace barrel of the single crystal furnace needs to be cleaned to ensure the quality of the subsequent production of single crystal silicon rods.

[0067] However, in the prior art, the inner wall of the furnace is usually cleaned manually, and the cleaning material is fixed on the top of a wooden pole to clean the inner wall of the furnace. However, this method has a small contact surface between the cleaning material and the inner wall of the furnace, and the wooden pole is long and heavy, which makes it inconvenient to take and take, and increases the labor intensity of the cleaning staff. It is not only time-consuming and laborious, but also has a poor cleaning effect, and the standing position of the cleaning staff is also in a safety risk position.

[0068] To this end, this embodiment provides a cleaning device 1 for cleaning the drum wall 21 of a furnace drum.

[0069] like Figure 1The figure shows a schematic diagram of the cleaning device 1 in a working state. The furnace includes a barrel 2, and the cleaning device 1 is arranged in the barrel 2, and the top of the cleaning device 1 is connected to the lifting device 3. The lifting device 3 is a lifting device 3 for fixing the seed crystal. After a single crystal silicon rod is generated, the single crystal silicon rod can be removed, and the cleaning device 1 can be installed on the lifting device 3. The lifting device 3 is controlled to drive the cleaning device 1 to rise and fall in the barrel 2. During the lifting process of the cleaning device 1, the cleaning device 1 can clean the barrel wall 21 of the barrel 2. After the cleaning work is completed, the cleaning device 1 can be removed from the lifting device 3, and the seed crystal can be fixed on the lifting device 3 to continue production.

[0070] In this embodiment, the cleaning device 1 is installed on the lifting device 3, and the lifting device 3 for lifting the seed crystal drives the cleaning device 1 to clean the cylinder wall 21 of the cylinder 2, thereby improving the cleaning efficiency compared with manual operation.

[0071] Specifically, Figure 2 Shown Figure 1 Schematic diagram of a cleaning device 1, the cleaning device 1 includes a connection seat 11 and a cleaning panel 12. The cleaning panel 12 is connected to the outer periphery of the connection seat 11 facing the cylinder wall 21, and the cleaning panel 12 and the connection seat 11 are rotatably connected. The cleaning panel 12 can rotate around the position connected to the connection seat 11 under the action of external force. The connection between the cleaning panel 12 and the connection seat 11 will be described in detail below.

[0072] In the direction perpendicular to the lifting and lowering of the cleaning device 1, the maximum diameter of the cleaning panel 12 is equal to the inner diameter of the cylinder wall 21, so that after the cleaning device 1 enters the cylinder body 2, the cleaning panel 12 fits with the cylinder wall 21. When the lifting device 3 controls the cleaning device 1 to rise or fall, friction is generated between the cylinder wall 21 and the cleaning panel 12. Under the action of the friction force applied by the cylinder wall 21, the cleaning panel 12 can rotate relative to the connecting seat 11 to convert the contact surface between the cleaning panel 12 and the cylinder wall 21.

[0073] Among them, the connecting seat 11 is a columnar structure. While providing support for the cleaning panel 12, the connecting seat 11 can also provide a certain gravity to the cleaning device 1 to prevent the friction between the cleaning panel 12 and the cylinder wall 21 from hindering the movement of the cleaning device 1, ensuring that the cleaning device 1 can stably perform lifting and lowering movements.

[0074] In this embodiment, a cleaning panel 12 is provided on the outer periphery of the connecting seat 11 facing the cylinder wall 21, which can increase the contact area between the cleaning panel 12 and the cylinder wall 21 in the same horizontal area, so that when the cleaning device 1 is rising or falling, the cleaning panel 12 can clean the cylinder wall 21 over a large area, thereby increasing the cleaning efficiency.

[0075] Mainly, in this embodiment, when the cleaning device 1 is rising or falling, the cleaning panel 12 can rotate under the action of friction to convert the contact surface between the cleaning panel 12 and the cylinder wall 21, so that when the cleaning device 1 is rising and falling, different surfaces of the cleaning panel 12 can clean the cylinder wall 21, thereby improving the cleaning effect.

[0076] like Figure 3 The figure shows a schematic diagram of a cleaning device 1, which includes a connecting seat 11, a connecting shaft 111 is provided on the outer periphery of the connecting seat 11, a cleaning panel 12 is sleeved on the connecting shaft 111, and the cleaning panel 12 can rotate around the connecting shaft 111. The connecting shaft 111 is provided with a connecting portion 111a, and the connecting portion 111a is connected to the connecting seat 11, so that there is a certain gap between the connecting shaft 111 and the surface of the connecting seat 11, so that the cleaning panel 12 can be sleeved on the connecting shaft 111.

[0077] Please continue to refer to Figure 3 In this embodiment, eight cleaning panels 12 may be provided, and the eight cleaning panels 12 are evenly distributed along the outer circumference of the connecting seat 11 facing the cylinder wall 21. Alternatively, the cleaning panels 12 may also be provided in six, ten, etc., and the specific number of settings may be set according to actual conditions.

[0078] It should be noted that if Figure 3 There may be a certain distance between adjacent cleaning panels 12, resulting in a portion of the cylinder wall 21 not being cleaned during the lifting process of the cleaning device 1. In this regard, when the cleaning device 1 is lifted again, the embodiment can control the lifting device 3 to drive the cleaning device 1 to rotate a certain angle so that the cleaning panel 12 corresponds to the area of ​​the cylinder wall 21 that was not cleaned last time.

[0079] like Figure 4 The figure shows a schematic diagram of the cleaning panel 12, which includes a cleaning portion 121 and a supporting portion 122 connected to each other. The cleaning portion 121 is used to clean the cylinder wall 21, and the supporting portion 122 is provided with a connecting hole 122a. The supporting portion 122 is sleeved on the connecting shaft 111 through the connecting hole 122a.

[0080] like Figure 5 The figure shows a schematic diagram of the cleaning section 121, where the dotted line framed portion is two cleaning areas of the cleaning section 121. Specifically, the cleaning section 121 is provided with a first cleaning area 121a and a second cleaning area 121b, and along the lifting direction of the cleaning device 1, the first cleaning area 121a is located below the second cleaning area 121b.

[0081] Please refer to Figures 2 to 5After the cleaning device 1 is loaded into the cylinder 2, part of the cleaning portion 121 always keeps in contact with the cylinder wall 21. When the cleaning device 1 moves downward in the cylinder 2, the cylinder wall 21 exerts an upward friction force on the cleaning portion 121, driving the support portion 122 to rotate clockwise around the connecting shaft 111, so that the first cleaning area 121a is in contact with the cylinder wall 21. In the process of the cleaning device 1 descending, the first cleaning area 121a cleans the cylinder wall 21.

[0082] Similarly, when the cleaning device 1 moves upward in the cylinder 2, the cylinder wall 21 exerts downward friction on the cleaning portion 121, driving the support portion 122 to rotate counterclockwise around the connecting shaft 111, so that the second cleaning area 121b fits against the cylinder wall 21. In the process of the cleaning device 1 rising, the second cleaning area 121b cleans the cylinder wall 21. Therefore, in the process of the cleaning device 1 rising and falling, the cleaning portion 121 cleans the cylinder wall 21 with different surfaces.

[0083] Please continue to refer to Figure 3 and Figure 4 In some embodiments, the cleaning portion 121 is an arc-shaped structure protruding toward the cylinder wall 21, so that when the friction force applied by the cylinder wall 21 to the cleaning portion 121 changes direction, the cleaning portion 121 can switch different areas to face the cylinder wall 21 for cleaning. Exemplarily, the cleaning portion 121 can be an arc-shaped plate.

[0084] Please continue to refer to Figure 4 In some embodiments, the support portion 122 is also provided with a limiting surface. During the rising or falling process of the cleaning device 1, the limiting surface can abut against the surface of the connecting seat 11 to limit the support portion 122 from continuing to rotate, thereby keeping the first cleaning area 121a or the second cleaning area 121b in contact with the cylinder wall 21 at all times to clean the cylinder wall 21.

[0085] If no limiting surface is provided, when the friction force exerted by the cylinder wall 21 on the cleaning portion 121 is too large, the support portion 122 may be driven to rotate too much, so that the cleaning portion 121 has no contact with the cylinder wall 21, resulting in the cleaning portion 121 being unable to clean the cylinder wall 21.

[0086] Specifically, the limiting surface includes a first constraint surface 122b and a second constraint surface 122c. The first constraint surface 122b and the second constraint surface 122c are arranged near the connecting seat 11 relative to the connecting hole 122a. That is, the limiting surface (the first constraint surface 122b and the second constraint surface 122c) and the cleaning portion 121 are arranged on both sides of the connecting shaft 111, and the limiting surface is between the connecting shaft 111 and the connecting seat 11. Moreover, along the lifting direction of the cleaning device 1, the first constraint surface 122b and the second constraint surface 122c are respectively located on both sides of the connecting hole 122a.

[0087] In this embodiment, when the cleaning device 1 is controlled to move downward in the cylinder 2, the cylinder wall 21 will exert an upward friction force on the cleaning portion 121, driving the support portion 122 to rotate clockwise around the connecting shaft 111. At this time, the first cleaning area 121a can contact the cylinder wall 21, and the first constraint surface 122b can rotate to abut against the surface of the connecting seat 11 to limit the support portion 122 from continuing to rotate around the connecting shaft 111, so that the first cleaning area 121a keeps in contact with the cylinder wall 21 to clean the cylinder wall 21.

[0088] Similarly, when the cleaning device 1 is controlled to move upward in the cylinder 2, the cylinder wall 21 will exert a downward friction force on the cleaning portion 121, driving the support portion 122 to rotate counterclockwise around the connecting shaft 111. At this time, the second cleaning area 121b can contact the cylinder wall 21, and the second constraint surface 122c can rotate to abut against the surface of the connecting seat 11 to limit the support portion 122 from continuing to rotate around the connecting shaft 111, so that the second cleaning area 121b keeps in contact with the cylinder wall 21 to clean the cylinder wall 21.

[0089] In some embodiments, a cleaning material may be directly disposed on a side of the cleaning portion 121 facing the cylinder wall 21 .

[0090] Alternatively, in some embodiments, a replaceable cleaning material is sleeved on the cleaning portion 121 .

[0091] like Figure 6 The figure shows a schematic diagram of the connection between the cleaning member 13 and the cleaning panel 12. The cleaning device 1 further comprises a cleaning member 13 and a cleaning panel 12. The cleaning member 13 is detachably mounted on the side of the cleaning portion 121 facing the cylinder wall 21. In this embodiment, the cleaning member 13 is mounted on the cleaning portion 121, and the cylinder wall 21 is cleaned by the cleaning member 13. When dirt or impurities are attached to the surface or inside of the cleaning member 13, the cleaning member 13 can be replaced or removed for cleaning, which is convenient to operate.

[0092] The cleaning member 13 may be a dust-free cloth or dust-free paper with alcohol.

[0093] Please continue to refer to Figure 6 The cleaning device 1 further includes a clamping member 14 and a cleaning panel 12 . The clamping member 14 is installed on the cleaning panel 12 . The clamping member 14 can clamp the cleaning member 13 to the cleaning portion 121 .

[0094] Specifically, two clamping members 14 are provided. Along the lifting direction of the cleaning device 1, the two clamping members 14 are respectively arranged at two edge positions of the cleaning portion 121 on the side facing away from the cylinder wall 21.

[0095] Figure 7 The schematic diagram of the card connector 14 is shown in FIG. Figure 6 and Figure 7The clamping member 14 is provided with a mounting portion 141, an elastic portion 142 and a sleeve portion 143. The mounting portion 141 is fixed on the cleaning portion 121, and the elastic portion 142 connects the mounting portion 141 and the sleeve portion 143. When the cleaning member 13 is sleeved on the cleaning portion 121, the edge of the cleaning member 13 can be wrapped around the edge of the cleaning portion 121. At this time, the sleeve portion 143 is sleeved on the edge of the cleaning member 13 and the cleaning portion 121, so as to fix the cleaning member 13 on the cleaning portion 121. In addition, the sleeve portion 143 can also have a certain elasticity. Through the tension applied by the elastic portion 142 to the sleeve portion 143, even when the cleaning portion 121 rotates with the support portion 122, the sleeve portion 143 will not be separated from the cleaning portion 121, thereby ensuring that the cleaning member 13 is restricted from being separated from the cleaning portion 121.

[0096] The elastic part 142 may be a spring or the like.

[0097] Alternatively, in some embodiments, the clamping member 14 may be a spring clip. When the edge of the cleaning member 13 is wrapped around the edge of the cleaning portion 121, the spring clip may be clamped on the edge of the cleaning member 13 and the cleaning portion 121, thereby fixing the cleaning member 13 on the cleaning portion 121. Figure 8 The figure shows a schematic diagram of the connection seat 11, a connection shaft 111 is installed on the outer periphery of the connection seat 11, and a fixing portion 112 is provided on the top of the connection seat 11, and the fixing portion 112 is used to connect with the lifting device 3. The connection method of the fixing portion 112 and the lifting device 3 is consistent with the connection method of the seed crystal and the lifting device 3, so that the seed crystal and the cleaning device 1 share the same lifting device 3.

[0098] In addition, this embodiment also provides a transport device, after the cleaning device 1 finishes cleaning a single crystal furnace, it can be transported to another single crystal furnace through the transport device, so that the cleaning device 1 cleans the barrel wall 21 of another single crystal furnace. Exemplarily, the transport device can be a cart, a flatbed truck, etc.

[0099] The above description is only an optional embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cleaning device for cleaning a cylinder wall (21) of a cylinder (2), characterized in that: The cleaning device (1) comprises: Connecting seat (11); A cleaning panel (12) is mounted on the outer periphery of the connecting seat (11) facing the cylinder wall (21); during the lifting and lowering of the cleaning device (1), the cleaning panel (12) can rotate relative to the connecting seat (11) to convert the contact surface between the cleaning panel (12) and the cylinder wall (21).

2. The cleaning device according to claim 1, characterized in that The cleaning panel (12) comprises a cleaning portion (121), the cleaning portion (121) being provided with a first cleaning area (121a) and a second cleaning area (121b), and along the lifting direction of the cleaning device (1), the first cleaning area (121a) is located below the second cleaning area (121b); During the descent of the cleaning device (1), the first cleaning area (121a) contacts the cylinder wall (21); during the ascent of the cleaning device (1), the second cleaning area (121b) contacts the cylinder wall (21).

3. The cleaning device according to claim 2, characterized in that: The cleaning portion (121) is in the shape of an arc that is convex toward the cylinder wall (21).

4. The cleaning device according to claim 2, characterized in that: The cleaning panel (12) further comprises a supporting portion (122), wherein the supporting portion (122) is connected to the cleaning portion (121); The support portion (122) is provided with a connection hole (122a), the outer periphery of the connection seat (11) is provided with a connection shaft (111), and the support portion (122) is sleeved on the connection shaft (111) through the connection hole (122a).

5. The cleaning device according to claim 4, characterized in that: The support portion (122) is also provided with a limited surface; During the process of lifting and lowering the cleaning device (1), the limiting surface can abut against the surface of the connecting seat (11) to limit the support portion (122) from continuing to rotate.

6. The cleaning device according to claim 5, characterized in that: The limiting surface comprises a first constraint surface (122b) and a second constraint surface (122c); The first constraint surface (122b) and the second constraint surface (122c) are arranged close to the connection seat (11) relative to the connection hole (122a), and along the lifting direction of the cleaning device (1), the first constraint surface (122b) and the second constraint surface (122c) are respectively located on both sides of the connection hole (122a); During the descent of the cleaning device (1), the first constraint surface (122b) can abut against the surface of the connecting seat (11), so that the first cleaning area (121a) maintains contact with the cylinder wall (21); During the ascending process of the cleaning device (1), the second constraint surface (122c) can abut against the surface of the connecting seat (11), so that the second cleaning area (121b) maintains contact with the cylinder wall (21).

7. The cleaning device according to claim 2, characterized in that: The cleaning device (1) further comprises a cleaning member (13); The cleaning member (13) is detachably mounted on a side of the cleaning portion (121) facing the cylinder wall (21).

8. The cleaning device according to claim 7, characterized in that: The cleaning device (1) further comprises a clamping member (14); The clamping member (14) is mounted on the cleaning panel (12), and the clamping member (14) can clamp the cleaning member (13) on the cleaning portion (121).

9. The cleaning device according to claim 7, characterized in that: The cleaning element (13) comprises a dust-free cloth or dust-free paper.

10. The cleaning device according to claim 1, characterized in that A fixing portion (112) is provided on the top of the connection seat (11), and the fixing portion (112) is used to be connected to the lifting device (3).

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