Filter disc replacing device and locking mechanism
By designing the filter disk replacement device, the combination of drive components, lifting belts and locking mechanisms, the automatic disassembly and installation of the filter disk is realized, solving the problems of large human resources consumption and safety hazards in the existing technology, and improving the safety of operation Sex and convenience.
Patent Information
- Application Number
- CN202323509740.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-21
AI Technical Summary
In the prior art, multiple people need to operate manually during filter disk replacement or maintenance, which consumes a lot of human resources and poses safety risks.
A filter disk replacement device is designed, including a drive element, a hoisting belt and a locking mechanism. The locking mechanism is lifted and lowered by the drive element and the lifting belt, and the automatic disassembly and installation of the filter plate is achieved by combining the hook and the pressing member.
It reduces manpower investment during filter disk replacement or maintenance, improves the safety and convenience of operation, and ensures that the filter disk is more stable during handling.
Smart Images
Figure CN222427319U_ABST
Abstract
Description
Technical Field
[0001] The disclosed embodiments relate to the technical field of chemical maintenance equipment, and in particular to a filter disc replacement device and a locking mechanism. Background Art
[0002] The filter in the wax filtration unit of the synthesis workshop is an important equipment in the synthesis workshop. The maintenance and operation quality of this equipment is directly related to the normal operation of chemical production products. The filter is used to filter the clay and diatomaceous earth after bearing to obtain high-purity products. After the equipment has been running for a long time, the impurities filtered out of the medium are mixed with clay, diatoms, etc., causing the filter disc to be blocked, so the filter disc needs to be replaced.
[0003] In the prior art, multiple people are required to work together to manually remove or install the filter disc, which consumes a lot of human resources. Utility Model Content
[0004] In view of this, an embodiment of the present disclosure provides a filter disc replacement device. One or more embodiments of the present disclosure also relate to a locking mechanism to solve the technical defects existing in the prior art.
[0005] According to a first aspect of an embodiment of the present disclosure, a filter disc replacement device is provided, comprising:
[0006] A driving element, wherein the driving element is connected to at least three lifting belts, each end of the lifting belt is connected to a locking mechanism, and the driving element is configured to drive the locking mechanism to rise and fall through the lifting belt;
[0007] The locking mechanism comprises:
[0008] a hook configured to clamp an edge of the filter disc;
[0009] A clamping piece is rotatably connected to the hook and connected to the lifting belt. The clamping piece is configured to rotate from an unlocking position to a locking position under the tensile force of the lifting belt to lock the filter plate and the hook.
[0010] In one embodiment of the present disclosure, the clamping member and the hook are hinged, and the connection point between the clamping member and the lifting belt and the contact point between the clamping member and the filter plate when in the locked position are arranged on both sides of the hinge point.
[0011] In one embodiment of the present disclosure,
[0012] The clamping member comprises a connecting arm and a clamping arm arranged at an obtuse angle, wherein the connecting arm is connected to the lifting belt, and the clamping arm is configured to clamp the filter disc in the hook when in a locked position.
[0013] In one embodiment of the present disclosure, the contact surface of the clamping arm that contacts the filter disc is a serrated surface.
[0014] In one embodiment of the present disclosure, the lifting belt is hinged to the pressing member.
[0015] In one embodiment of the present disclosure, the contact surface of the hook that contacts the filter disc is a serrated surface.
[0016] In one embodiment of the present disclosure, the hook has a U-shaped slot, and the hook clamps the filter disc through the U-shaped slot.
[0017] According to a second aspect of an embodiment of the present disclosure, a locking mechanism is provided, the locking mechanism comprising:
[0018] a hook configured to clamp an edge of the filter disc;
[0019] A pressing member is rotatably connected to the hook and is configured to rotate from an unlocking position to a locking position under the action of an external force to lock the filter disc and the hook.
[0020] In one embodiment of the present disclosure, the clamping member includes a connecting arm and a clamping arm set at an obtuse angle, the hook is hinged to the clamping member through a transition connection between the connecting arm and the clamping arm, and the connecting arm rotates relative to the hook under the action of an external force to drive the clamping arm to clamp the filter plate inside the hook.
[0021] In one embodiment of the present disclosure, the contact surface of the clamping arm that contacts the filter disc is a serrated surface; and / or,
[0022] The contact surface of the hook that contacts the filter disc is a serrated surface.
[0023] The filter disc replacement device disclosed in the present invention can remove or install the filter disc through the cooperation between the driving element, the lifting belt, the clamping piece and the hook, thereby reducing the investment in human resources. At the same time, connecting the clamping piece to the hook can make the combination of the filter disc and the hook more firmly, making the process of removing or installing the filter disc safer and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a structural schematic diagram of a filter disc replacement device provided by an embodiment of the present disclosure;
[0025] Figure 2A is a schematic diagram of a first unlocking position of a filter disc replacement device provided by another embodiment of the present disclosure;
[0026] Figure 2Bis a schematic diagram of a first locking position in a filter disc replacement device provided by another embodiment of the present disclosure;
[0027] Figure 3 is a top view of a filter disc in a first locking position of a filter disc replacement device provided by another embodiment of the present disclosure;
[0028] Figure 4A is a schematic diagram of a second unlocking position in a filter disc replacement device provided by another embodiment of the present disclosure;
[0029] Figure 4B is a schematic diagram of a second locking position in a filter disc replacement device provided by another embodiment of the present disclosure;
[0030] Figure 5 It is a structural schematic diagram of a locking mechanism provided by another embodiment of the present disclosure.
[0031] Figures 1 to 5 The one-to-one correspondence between the component names and the figure marks is as follows: 1. driving element; 2. lifting belt; 3. locking mechanism; 31. hook; 311. serrated surface; 312. open groove; 32. clamping piece; 321. connecting arm; 322. clamping arm; 4. filter plate. DETAILED DESCRIPTION
[0032] Many specific details are described in the following description to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present disclosure, so the present disclosure is not limited by the specific implementation disclosed below.
[0033] The terms used in one or more embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of the present disclosure. The singular forms of "a", "said" and "the" used in one or more embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of the present disclosure refers to and includes any or all possible combinations of one or more associated listed items.
[0034] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of the present disclosure, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of the present disclosure, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".
[0035] In the prior art, when the filter disc on the filter machine is replaced or repaired, due to the high professional maintenance platform, multiple people are required to manually lift the filter disc. Therefore, more human resources are consumed when replacing or repairing the filter disc, and there is also a risk of the filter disc falling off and causing injuries to people.
[0036] To this end, in the present disclosure, a filter disc replacement device is provided. The present disclosure also relates to a locking mechanism, which will be described in detail one by one in the following embodiments.
[0037] See also Figure 1 , Figure 1 A filter disc 4 replacement device provided according to an embodiment of the present disclosure is shown. The filter disc 4 replacement device includes a driving element 1, a lifting belt 2 and a locking mechanism 3.
[0038] The driving element 1 is connected to at least three lifting belts 2 , each end of the lifting belt 2 is connected to a locking mechanism 3 , and the driving element 1 is configured to drive the locking mechanism 3 to rise and fall through the lifting belts 2 .
[0039] Specifically, the driving element 1 can be a crane, an electric hoist, etc. The driving element 1 provides power for the filter disc 4 to rise or fall through the lifting belt 2. The driving element 1 is connected to the locking mechanism 3 through at least three lifting belts 2. For example, the number of lifting belts 2 and the locking mechanism 3 can be set to three, or an integer greater than three, such as four, five, etc. These locking mechanisms 3 are evenly arranged along the edge of the filter disc 4, and the filter disc is provided with multiple force points by means of the tensile force of the lifting belt 2. It can be understood that the more force points there are, the safer the filter disc is during lifting and lowering. Considering the cost at that time, the filter disc replacement device disclosed in the present invention selected three lifting belts 2, and each lifting belt 2 is equipped with a locking mechanism 3. In actual use, the three locking mechanisms 3 are evenly distributed on the outer peripheral wall of the filter disc in a 120-degree ring to provide a reliable and powerful external force to keep the filter disc 4 stable during lifting or lowering.
[0040] For further information, see Figure 2A and Figure 2B In order to keep the filter plate stable during lifting or transportation, the locking mechanism 3 includes a hook 31 and a pressing member 32.
[0041] The hook 31 is configured to clamp the edge of the filter disc 4 . In actual filter disc replacement or maintenance, the hook 31 needs to be clamped on the filter disc first. The hook 31 can carry the filter disc 4 .
[0042] The pressing piece 32 can clamp the filter disc 4. The pressing piece 32 is rotatably connected to the hook 31 and is connected to the lifting belt 2. The pressing piece 32 is configured to rotate from the unlocking position to the locking position under the tensile force of the lifting belt 2 to lock the filter disc 4 and the hook 31. That is, the pressing piece 32 rotates under the tensile force of the lifting belt 2 until it contacts the filter disc 4 and clamps the filter disc 4. The position where the pressing piece 32 does not contact the filter disc 4 is the unlocking position. Figure 2A or Figure 4A The position where the pressing member 32 contacts the filter plate 4 and provides support to the filter plate 4 is the locking position. Figure 2B or Figure 4B .
[0043] Specifically, there are two ways in which the pressing member presses the filter disc:
[0044] The first method is to Figure 2A and Figure 2B In one embodiment of the present disclosure, after the hook is clamped on the edge of the filter disc 4, the driving element 1 is started, and the filter disc is lifted by the lifting belt. During the lifting process, since the clamping piece 32 is rotatably connected with the hook 31, the clamping arm 322 of the clamping piece 32 swings in the open groove 312 of the hook 31, and the clamping piece 32 contacts the outer peripheral wall of the filter disc 4 under the tensile force of the lifting belt 2, providing a clamping force extending radially along the filter disc 4 to the filter disc 4. Figure 2A and Figure 2B The figure shows the situation that one locking mechanism 3 cooperates with the filter disc. In practical application, at least three locking mechanisms 3 are used at the same time and are arranged at equal intervals or symmetrically on the edge of the filter disc. Each locking mechanism 3 is installed in cooperation with the filter disc in the same way as above. Figure 3 As shown, since each locking mechanism 3 provides a pressing force extending radially along the filter disc, the cooperation of at least three locking mechanisms 3 can balance the force on the filter disc. Therefore, the filter disc can be locked by using at least three locking mechanisms 3 at the same time.
[0045] The second method see Figure 4A and Figure 4B In another embodiment of the present disclosure, after the hook is clamped on the edge of the filter disc 4, the driving element 1 is started, and the filter disc is lifted by the lifting belt. During the lifting process, since the clamping piece 32 is rotatably connected with the hook 31, the clamping arm 322 of the clamping piece 32 swings in the open groove 312 of the hook 31. Under the tensile force of the lifting belt 2, the clamping piece 32 contacts the upper surface of the filter disc 4, providing the filter disc 4 with a supporting force perpendicular to the surface of the filter disc 4. Figure 4A and Figure 4B The figures show the situation that one locking mechanism 3 cooperates with the filter disc 4. In actual application, at least three locking mechanisms 3 are used at the same time and are arranged at equal intervals or symmetrically on the edge of the filter disc 4. Each locking mechanism 3 is installed in cooperation with the filter disc 4 in the same way as described above, so that the filter disc 4 is locked on the hook.
[0046] When the filter disc 4 is lifted to the replacement site, the staff needs to manually remove the filter disc 4 from the locking structure. During the removal, the clamping parts of each clamping mechanism need to be manually rotated so that the clamping arm is away from the filter disc 4, thereby releasing the filter disc 4 and removing the filter disc 4.
[0047] After the inspection of the filter disc 4 is completed, the hook is clamped on the filter disc 4 again, and the filter disc 4 is compressed by the clamping piece. The driving element 1 is started and the filter disc 4 is lowered by the lifting belt until it drops to the initial position. The staff removes the filter disc 4 from the locking mechanism 3 again and reinstalls the filter disc 4 on the filter machine.
[0048] The disclosed embodiment carries the filter disc 4 through the locking mechanism 3, the driving element 1 provides power, and the locking mechanism 3 carrying the filter disc 4 is connected to the driving element 1 through the lifting belt 2, so that the filter disc 4 can be raised or lowered under the drive of the driving element. The staff only needs to clamp the filter disc 4 on the locking mechanism 3 to remove the filter disc 4 from the locking mechanism 3, thereby reducing the input of manual labor during the replacement or maintenance of the filter disc 4. In addition, the filter disc 4 can be made more stable during the transportation process through the clamping piece 32.
[0049] Furthermore, the pressing member 32 and the hook 31 are hinged, and the connection point between the pressing member 32 and the lifting belt 2 and the contact point between the pressing member 32 and the filter plate 4 when the pressing member 32 is in the locked position are respectively arranged on both sides of the hinge point.
[0050] In this arrangement, the pressing member and the hook 31 form a lever structure. When the pressing member 32 is subjected to the tensile force of the lifting belt, it rotates around the hinge point to provide a pressing force to the filter plate. The structure is simple and easy to implement.
[0051] Specifically, the pressing member 32 includes a connecting arm 321 and a pressing arm 322 arranged at an obtuse angle, the connecting arm 321 is connected to the lifting belt 2, and the pressing arm 322 is configured to press the filter plate 4 into the hook 31 when in the locking position. The lifting belt 2 is hinged to the pressing member 32.
[0052] In one embodiment of the present disclosure, a first through hole is provided on the connecting arm 321 of the pressing member 32, a first clamp is connected to the first through hole, and the first clamp hinges the connecting arm 321 to the lifting belt 2. At the same time, a second through hole is also provided at the connection between the connecting arm 321 and the pressing arm 322, and the pressing member 32 is hinged to the hook 31 through the second through hole.
[0053] The hook 31 is provided with an open slot 312 corresponding to the position where the pressing member 32 moves. When the pressing member 32 is subjected to external force, it swings in the open slot 312. Specifically, when the connecting arm 321 of the pressing member 32 is subjected to the tensile force of the lifting belt 2, the pressing arm 322 of the pressing member 32 swings toward the filter disc 4 with the second through hole as the center until it contacts the filter disc 4. At this time, the pressing member 32 can lock the filter disc 4 in the hook 31.
[0054] In another embodiment of the present disclosure, the connecting arm 321 and the pressing arm 322 of the pressing member 32 may be arranged at 180 degrees, that is, the pressing arm 322 is straight as a whole.
[0055] The disclosed embodiment hinges the clamping piece 32 with the hook 31, and the lifting belt 2 connected to the clamping piece 32 can provide a tensile force, so that the clamping piece 32 can compress the filter disc 4 under the tensile force, making the filter disc 4 more stable during transportation and improving the safety of the filter disc 4 during repair.
[0056] For further information, see Figure 5 In order to prevent the filter disc 4 from slipping during maintenance or replacement, the contact surface of the clamping arm 322 that contacts the filter disc 4 is a serrated surface. The contact surface of the hook 31 that contacts the filter disc 4 is a serrated surface 311.
[0057] The embodiment of the present disclosure provides serrated surfaces on the clamping arm 322 and the hook 31 , thereby increasing the friction between the filter disc 4 and the locking mechanism 3 , thereby preventing the filter disc 4 from slipping when being lifted or lowered.
[0058] Furthermore, in order to make the hook 31 fit the shape of the filter disc 4 better, the hook 31 has a U-shaped slot, and the hook 31 clamps the filter disc 4 through the U-shaped slot.
[0059] Specifically, since the filter disc 4 has a certain thickness, by providing a U-shaped slot on the hook 31, the hook 31 can be more closely fitted to the edge of the filter disc 4, thereby making the filter disc 4 more stable during the process of lifting or carrying the filter disc 4.
[0060] After the filter disc 4 is locked by the locking mechanism 3 in the disclosed embodiment, the filter disc 4 is connected to the driving element 1 by the lifting belt 2. When the driving element 1 provides power, the filter disc 4 is lifted or transported, which can reduce the manpower input during the lifting or transportation of the filter disc 4. At the same time, the setting of the locking mechanism 3 can make the filter disc 4 more stable and enhance the safety of the filter disc 4 during the lifting or transportation.
[0061] See also Figure 5 In a second aspect of an embodiment of the present disclosure, a locking mechanism 3 is provided. The locking mechanism 3 includes a hook 31 and a pressing member 32 .
[0062] The hook 31 is constructed to clamp the edge of the filter disc 4; the pressing piece 32 is rotatably connected to the hook 31 and is configured to rotate from an unlocked position to a locked position under the action of an external force to lock the filter disc 4 and the hook 31.
[0063] Specifically, the number of hooks 31 can be set according to actual needs. For example, in one embodiment of the present disclosure, four hooks 31 can be set. These four hooks 31 are arranged at equal intervals or symmetrically along the edge of the filter disc 4, so that the weight of the filter disc 4 can be evenly distributed on the hooks 31 to prevent the filter disc 4 from tilting. After the hooks 31 are clamped on the edge of the filter disc 4, the filter disc 4 can be pressed by the pressing member 32. The pressing member 32 can be rotated from the unlocking position to the locking position under the tensile force of the lifting belt 2, wherein the position where the pressing member 32 is not in contact with the filter disc 4 is the unlocking position. Figure 2A The position where the pressing member 32 contacts the filter plate 4 and provides support to the filter plate 4 is the locking position. Figure 2B .
[0064] Furthermore, the clamping member 32 includes a connecting arm 321 and a clamping arm 322 which are arranged at an obtuse angle, and the hook 31 is hinged to the clamping member 32 through a transition connection between the connecting arm 321 and the clamping arm 322, and the connecting arm 321 rotates relative to the hook 31 under the action of an external force to drive the clamping arm 322 to clamp the filter disc 4 in the hook 31.
[0065] Specifically, in one embodiment of the present disclosure, a first through hole is provided on the connecting arm 321 of the pressing member 32, a first clamp is connected in the first through hole, and the first clamp connects the connecting arm 321 to the lifting belt 2. At the same time, a second through hole is also provided at the connection between the connecting arm 321 and the pressing arm 322, and the pressing member 32 is hinged to the hook 31 through the second through hole.
[0066] The hook 31 is provided with an open slot 312 corresponding to the position where the pressing member 32 moves. When the pressing member 32 is subjected to external force, it swings in the open slot 312. Specifically, when the connecting arm 321 of the pressing member 32 is subjected to the tensile force of the lifting belt 2, the pressing arm 322 of the pressing member 32 swings toward the filter disc 4 with the second through hole as the center until it contacts the filter disc 4. At this time, the pressing member 32 can lock the filter disc 4 in the hook 31.
[0067] In another embodiment of the present disclosure, the connecting arm 321 and the pressing arm 322 of the pressing member 32 may be arranged at 180 degrees, that is, the pressing arm 322 is straight as a whole.
[0068] like Figure 2A and Figure 2B As shown, in one embodiment of the present disclosure, the pressing member 32 locks the filter plate 4 as shown in FIG. Figure 2A and Figure 2B As shown, after the clamping piece 32 is connected to the hook 31, the clamping arm 322 of the clamping piece 32 swings in the open groove 312 of the hook 31. Under the tensile force of the lifting belt 2, the clamping piece 32 contacts the outer edge of the filter plate 4, providing a supporting force to the filter plate 4 pointing to the center of the filter plate 4.
[0069] like Figure 4A and Figure 4B As shown, in another embodiment of the present disclosure, the pressing member 32 locks the filter plate 4 as shown in FIG. Figure 4A and Figure 4B As shown, after the clamping piece 32 is connected to the hook 31, the clamping arm 322 of the clamping piece 32 swings in the open groove 312 of the hook 31. Under the tensile force of the lifting belt 2, the clamping piece 32 contacts the upper surface of the filter disc 4, providing the filter disc 4 with a supporting force perpendicular to the surface of the filter disc 4.
[0070] The disclosed embodiment hinges the clamping piece 32 with the hook 31, and the lifting belt 2 connected to the clamping piece 32 can provide a tensile force, so that the clamping piece 32 can compress the filter disc 4 under the tensile force, making the filter disc 4 more stable during transportation and improving the safety of the filter disc 4 during repair.
[0071] Further, the contact surface of the clamping arm 322 that contacts the filter disc 4 is a serrated surface; and / or the contact surface of the hook 31 that contacts the filter disc 4 is a serrated surface 311 .
[0072] The embodiment of the present disclosure provides serrated surfaces on the clamping arm 322 and the hook 31 , thereby increasing the friction between the filter disc 4 and the locking mechanism 3 , thereby preventing the filter disc 4 from slipping when being lifted or lowered.
[0073] In addition to being used for filter disc replacement, the locking mechanism 3 in the embodiment of the present disclosure can also be used in other material handling scenarios, for example, in a scenario where a crane transports steel bars, and the embodiment of the present disclosure is not limited thereto.
[0074] The locking mechanism 3 in the disclosed embodiment can support the filter disc 4 via the hook 31 and clamp the filter disc 4 and the hook 31 via the clamping member 32, which can make the filter disc 4 more stable during transportation and enhance the safety of the filter disc 4 during lifting or transportation.
[0075] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should know that the embodiments of the present disclosure are not limited by the described action sequence, because according to the embodiments of the present disclosure, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of the present disclosure.
[0076] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0077] The preferred embodiments of the present disclosure disclosed above are only used to help explain the present disclosure. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the embodiments of the present disclosure. The present disclosure selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of the present disclosure, so that technicians in the relevant technical field can well understand and use the present disclosure. The present disclosure is limited only by the claims and their full scope and equivalents.
Claims
1. A filter disc replacement device, characterized in that: include: A driving element (1), wherein the driving element (1) is connected to at least three lifting belts (2), each end of the lifting belt (2) is connected to a locking mechanism (3), and the driving element (1) is configured to drive the locking mechanism (3) to rise and fall through the lifting belt (2); The locking mechanism (3) comprises: A hook (31), wherein the hook (31) is configured to clamp the edge of the filter disc (4); A clamping piece (32), the clamping piece (32) is rotatably connected to the hook (31) and is connected to the lifting belt (2), and the clamping piece (32) is configured to rotate from an unlocking position to a locking position under the action of the tensile force of the lifting belt (2) to lock the filter plate (4) and the hook (31).
2. The filter disc replacement device according to claim 1, characterized in that: The clamping piece (32) and the hook (31) are hinged, and the connection point between the clamping piece (32) and the lifting belt (2) and the contact point between the clamping piece (32) and the filter plate (4) when in the locked position are arranged on both sides of the hinge point.
3. The filter disc replacement device according to claim 2, characterized in that: The clamping member (32) comprises a connecting arm (321) and a clamping arm (322) arranged at an obtuse angle, the connecting arm (321) being connected to the lifting belt (2), and the clamping arm (322) being configured to clamp the filter plate (4) in the hook (31) when in a locked position.
4. The filter disc replacement device according to claim 3, characterized in that: The contact surface of the clamping arm (322) that contacts the filter disc (4) is a serrated surface.
5. The filter disc replacement device according to claim 1, characterized in that: The lifting belt (2) is hinged to the pressing piece (32).
6. The filter disc replacement device according to claim 1, characterized in that: The contact surface of the hook (31) that contacts the filter disc (4) is a serrated surface (311).
7. The filter disc replacement device according to claim 1, characterized in that: The hook (31) has a U-shaped slot, and the hook (31) clamps the filter disc (4) through the U-shaped slot.
8. A locking mechanism, characterized in that: The locking mechanism comprises: A hook (31), wherein the hook (31) is configured to clamp the edge of the filter disc (4); A pressing piece (32) is rotatably connected to the hook (31) and is configured to rotate from an unlocking position to a locking position under the action of an external force to lock the filter disc (4) and the hook (31).
9. The locking mechanism according to claim 8, characterized in that: The pressing member (32) comprises a connecting arm (321) and a pressing arm (322) which are arranged at an obtuse angle, the hook (31) is hinged to the pressing member (32) via a transitional connection between the connecting arm (321) and the pressing arm (322), and the connecting arm (321) rotates relative to the hook (31) under the action of an external force to drive the pressing arm (322) to press the filter disc (4) into the hook (31).
10. The locking mechanism according to claim 9, characterized in that: The contact surface of the clamping arm (322) that contacts the filter disc (4) is a serrated surface; and / or, The contact surface of the hook (31) that contacts the filter disc (4) is a serrated surface (311).