Filtering device

Abstract

The utility model relates to the technical field of filtering, in particular to a filtering device which comprises a pump, a first filtering mechanism, a second filtering mechanism and a third filtering mechanism, the pump is communicated with the first filtering mechanism, the pump can suck and convey objects to be filtered to the first filtering mechanism, the first filtering mechanism can filter part of impurities of the objects to be filtered, and the second filtering mechanism can filter part of impurities of the objects to be filtered. The second filtering mechanism comprises a cylinder and a magnetic part, the magnetic part is arranged in the cylinder, one end of the cylinder is communicated with the first filtering mechanism, the magnetic part can magnetically attract a to-be-magnetically attracted body of a to-be-filtered object conveyed to the cylinder by the first filtering mechanism, and the third filtering mechanism is communicated with the other end of the cylinder; and the third filtering mechanism can filter part of impurities of the to-be-filtered material conveyed to the third filtering mechanism by the cylinder body. Through the structure, the filtering device has a good filtering effect and can magnetically attract part of the to-be-magnetically attracted body.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, and particularly relates to a filtration device. Background Art

[0002] The capacitor core of a capacitor includes a plurality of ceramic sheets and a plurality of conductive layers alternately stacked. In the ceramic sheet preparation process, ceramic slurry is coated on a substrate, such as a polyester film, and a uniform ceramic sheet is formed by controlling the coating thickness and drying speed.

[0003] However, in the process of implementing the present utility model, the inventor found that impurities contained in the ceramic slurry, such as metal particles, result in poor electrical performance of the capacitor. Especially under high voltage, the metal particles may form a conductive path between the ceramic layers, leading to dielectric breakdown and causing the capacitor to fail. Summary of the Utility Model

[0004] The present utility model provides a filtration device which has a good filtration effect and can magnetically attract a part of the objects to be magnetically attracted.

[0005] To solve the above technical problems, one technical solution adopted by the present utility model is: to provide a filtration device, including a pump, a first filtration mechanism, a second filtration mechanism and a third filtration mechanism. The pump is connected to the first filtration mechanism. The pump is used to suck the object to be filtered and transport it to the first filtration mechanism. The first filtration mechanism is used to filter out some impurities of the object to be filtered. The second filtration mechanism includes a cylinder body and a magnetic member. The magnetic member is arranged inside the cylinder body. One end of the cylinder body is connected to the first filtration mechanism. The magnetic member is used to magnetically attract the objects to be magnetically attracted in the object to be filtered transported from the first filtration mechanism to the cylinder body. The third filtration mechanism is connected to the other end of the cylinder body. The third filtration mechanism is used to filter out some impurities of the object to be filtered transported from the cylinder body to the third filtration mechanism.

[0006] Optionally, the cylinder body is provided with a cylinder cavity; the number of the magnetic members is multiple, and the multiple magnetic members are arranged at intervals along the circumferential direction of the cylinder cavity.

[0007] Optionally, the first filtration mechanism includes a first filtration cylinder and a fiber filter core. The first filtration cylinder is provided with a first filtration cavity. The fiber filter core is arranged in the first filtration cavity. One end of the first filtration cylinder is connected to the pump, and the other end of the first filtration cylinder is connected to the second filtration mechanism.

[0008] Optionally, the third filtration mechanism includes a cylinder component and a filter screen. One end of the cylinder component is connected to the other end of the cylinder body. The other end of the cylinder component is for connecting to an external device. The filter screen is arranged in the cylinder component. The filter screen is used to intercept the impurities of the object to be filtered.

[0009] Optionally, the cylinder assembly includes a first cylinder, a second cylinder and a clamp. The first cylinder and the second cylinder are arranged opposite to each other, and the first cylinder and the second cylinder jointly enclose a second filter chamber. The filter screen is arranged in the second filter chamber. The first cylinder is communicated with an external device. The second cylinder is connected to the other end of the cylinder body. The clamp is used to clamp or loosen the first cylinder and the second cylinder. When the clamp clamps the first cylinder and the second cylinder, the first cylinder is conducted relative to the second cylinder. When the clamp loosens the first cylinder and the second cylinder, the first cylinder is separated from the second cylinder.

[0010] Optionally, the clamp includes a snap ring, a screw rod and a nut member. The snap ring is provided with a gap. Part of the snap ring is sleeved on the first cylinder, and the other part of the snap ring is sleeved on the second cylinder. The nut member is connected to the snap ring, and the nut member is screwed on the screw rod. The nut member is used to adjust the gap so that the snap ring clamps or loosens the first cylinder and the second cylinder.

[0011] Optionally, the third filtering mechanism further includes a first sealing ring, and the first sealing ring is arranged between the first cylinder and the second cylinder.

[0012] Optionally, the first cylinder is provided with a filter groove, the filter screen is arranged in the filter groove, and the second cylinder covers the notch of the filter groove; the second cylinder is provided with a supporting portion, and the supporting portion is used to press the filter screen.

[0013] Optionally, the third filtering mechanism further includes a second sealing ring, and the second sealing ring is sleeved on the supporting portion, and one end of the second sealing ring away from the supporting portion abuts against the first cylinder.

[0014] Optionally, the third filtering mechanism further includes a buffer net, and the buffer net is arranged between the second cylinder and the filter screen, and the buffer net is used to weaken the impact of the object to be filtered.

[0015] The beneficial effects of the embodiments of the present application are as follows: The user starts the pump, and the pump sucks the object to be filtered and conveys it to the first filtering mechanism. After the object to be filtered filters out some impurities in the first filtering mechanism, it flows to the cylinder body of the second filtering mechanism. The magnetic member can magnetically attract the object to be magnetized in the object to be filtered, so that the object to be magnetized adheres to the magnetic member to achieve the effect of filtering impurities. Then, the object to be filtered flows from the cylinder body of the second filtering mechanism to the third filtering mechanism, and the third filtering mechanism filters the impurities of the object to be filtered again, so as to realize the filtering of the impurities in the object to be filtered and further reduce the impurities in the object to be filtered. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for use in the embodiments of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the accompanying drawings.

[0017] Figure 1 is a schematic diagram of a filtering device provided by the present utility model;

[0018] Figure 2 is a view of the second filtering mechanism in a three-dimensional state provided by the present utility model;

[0019] Figure 3 is a sectional view of the second filtering mechanism in a three-dimensional state provided by the present utility model;

[0020] Figure 4 is an exploded view of the third filtering mechanism in a three-dimensional state provided by the present utility model;

[0021] Figure 5 is a sectional view of the third filtering mechanism in a three-dimensional state provided by the present utility model.

[0022] Reference numerals:

[0023] 100, filtering device; 10, pump; 20, first filtering mechanism; 30, second filtering mechanism; 301, cylinder body; 302, magnetic member; 301a, cylinder cavity;

[0024] 40, third filtering mechanism; 41, cylinder assembly; 42, filter screen; 43, first sealing ring; 44, second sealing ring; 45, buffer screen; 411, first cylinder; 412, second cylinder; 413, clamp; 451, grid; 452, fixing ring; 4111, first connecting ring; 4112, first pressing inclined portion; 4121, abutting portion; 4122, second connecting ring; 4123, second pressing inclined portion; 4131, buckle ring; 4132, screw; 4133, nut member; 413a, buckling groove; 413b, gap;

[0025] 50, container; 60, spray head; 70, base. Detailed implementation manners

[0026] For the convenience of understanding the present utility model, the present utility model will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0028] Please refer to Figure 1 , the filtering device 100 includes a pump 10, a first filtering mechanism 20, a second filtering mechanism 30 and a third filtering mechanism 40. The pump 10 is communicated with the first filtering mechanism 20. The pump 10 can suck the material to be filtered and convey it to the first filtering mechanism 20. The first filtering mechanism 20 can filter out some impurities of the material to be filtered. The second filtering mechanism 30 is communicated with the first filtering mechanism 20. The second filtering mechanism 30 can filter out another part of the impurities of the material to be filtered conveyed from the first filtering mechanism 20 to the second filtering mechanism 30. The third filtering mechanism 40 is communicated with the second filtering mechanism 30. The second filtering mechanism 30 conveys another part of the impurities of the material to be filtered to the third filtering mechanism 40.

[0029] For the above-mentioned pump 10, it includes a driving member, a blade and a pump body. One end of the pump body is communicated with a container 50 for accommodating the material to be filtered. The other end of the pump body is communicated with the first filtering mechanism 20. The pump body is provided with a pump chamber. The blade is arranged in the pump chamber, and the blade can rotate relative to the pump body. The driving member is connected to the blade, and the driving member can drive the blade to rotate to push the fluid in the pump chamber to flow, so as to realize the suction of the material to be filtered.

[0030] For the above-mentioned first filtering mechanism 20, the first filtering mechanism 20 includes a first filter cylinder and a fiber filter core. The first filter cylinder is provided with a first filter cavity. The fiber filter core is arranged in the first filter cavity. One end of the first filter cylinder is communicated with the pump body, and the other end of the first filter cylinder is communicated with the second filtering mechanism 30.

[0031] For the fiber filter element, the fiber filter element includes a support mesh sleeve and a plurality of filter sleeves. The filter sleeves are in a bag shape, and a plurality of filter sleeves are stacked and sleeved. The support mesh sleeve is sleeved on the plurality of filter sleeves, and the plurality of filter sleeves are located inside the support mesh. The support mesh sleeve serves to support the filter sleeves, increasing the rigidity and stability of the fiber filter element. Among them, the materials for preparing the filter sleeves include polyester fiber, polypropylene fiber, glass fiber, nylon fiber, etc. In some embodiments, there are two support mesh sleeves, and the two support mesh sleeves are sleeved on each other, and the plurality of filter sleeves are arranged between the two support mesh sleeves, further increasing the support stability of the plurality of filter sleeves.

[0032] For the above-mentioned second filtering mechanism 30, please refer to Figures 2 - 3 , the second filtering mechanism 30 includes a cylinder body 301 and a magnetic member 302. The magnetic member 302 is arranged inside the cylinder body 301. One end of the cylinder body 301 is communicated with the first filtering mechanism 20, and the magnetic member 302 can magnetically attract the magnetizable body of the material to be filtered conveyed by the first filtering mechanism 20 to the cylinder body 301. When the container 50 containing the material to be filtered, the material to be filtered comes into contact and collision with the wall surface of the container 50, and some particulate matters fall from the wall surface of the container 50 into the material to be filtered, becoming part of the impurities of the material to be filtered. For example, if the container 50 is made of metal, the particulate matter is metal particulate matter, and some metal particulate matters can be magnetically attracted by the magnetic member 302. In addition, when the pump 10 sucks the material to be filtered, the material to be filtered comes into contact and collision with the blades and the pump body, and particulate matters will also fall and mix with the material to be filtered, forming impurities of the material to be filtered.

[0033] In some embodiments, the cylinder body 301 is provided with a cylinder cavity 301a, and the number of the magnetic members 302 is multiple, and the multiple magnetic members 302 are arranged at intervals along the circumferential direction of the cylinder cavity 301a.

[0034] In some embodiments, the second filtering mechanism 30 further includes a handle, and the handle is connected to the cylinder body 301. The user can lift the second filtering mechanism 30 through the handle, which is convenient for the user to carry.

[0035] For the above-mentioned third filtering mechanism 40, please refer to Figure 4 Combined with Figure 5, the third filter mechanism 40 includes a barrel assembly 41 and a filter screen 42. One end of the barrel assembly 41 is connected to the other end of the barrel body 301, and the other end of the barrel assembly 41 is used for connection with external equipment, and the filter screen 42 is arranged on the barrel assembly 41. When the second filter mechanism 30 conveys the filtered material to the third filter mechanism 40, the filter screen 42 can intercept some impurities of the filtered material, for example: impurities dropped on the filtered material by the fiber filter element, and particulate matter shed by the fiber filter element itself. In this embodiment, the other end of the barrel assembly 41 is connected to the nozzle 60. Since the pump 10 sucks and pushes the filtered material to move toward the first filter mechanism 20, the second filter mechanism 30 and the third filter mechanism 40, that is, the pressure in the barrel assembly 41 is greater than the external pressure, so that the nozzle 60 produces a spraying effect, and a thin layer of filtered material is formed on the base 70 of the filtered material sprayed by the nozzle 60.

[0036] For the above cartridge assembly 41, see Figure 4 The barrel assembly 41 includes a first barrel 411, a second barrel 412 and a clamp 413. The first barrel 411 and the second barrel 412 are arranged opposite to each other, and the first barrel 411 and the second barrel 412 jointly enclose a second filter chamber 41a, the filter screen 42 is arranged in the second filter chamber 41a, the first barrel 411 is connected to an external device, the second barrel 412 is connected to the other end of the barrel body 301, and the clamp 413 is used to clamp or release the first barrel 411 and the second barrel 412. When the clamp 413 clamps the first barrel 411 and the second barrel 412, the first barrel 411 is connected to the second barrel 412, and when the clamp 413 releases the first barrel 411 and the second barrel 412, the first barrel 411 is separated from the second barrel 412.

[0037] For the above mentioned clamp 413, see Figure 4, the clamp 413 includes a buckle 4131, a screw 4132 and a nut member 4133. The buckle 4131 is provided with a gap 413b. A part of the buckle 4131 is sleeved on the first cylinder 411, and another part of the buckle 4131 is sleeved on the second cylinder 412. The nut member 4133 is connected to the buckle 4131, and the nut member 4133 is screwed onto the screw 4132. When the clamp 413 clamps the first cylinder 411 and the second cylinder 412, by rotating the nut member 4133, the nut member 4133 rotates and moves relative to the screw 4132, and the nut member 4133 pushes one end of the buckle 4131 towards the other end of the buckle 4131, so that the gap 413b of the buckle 4131 is reduced, and the buckle 4131 clamps the first cylinder 411 and the second cylinder 412. When disassembling the first cylinder 411 and the second cylinder 412, by rotating the nut member 4133, the nut member 4133 rotates and moves relative to the screw 4132, the nut member 4133 loosens one end of the buckle 4131 and moves towards the other end of the buckle 4131, and the nut member 4133 gradually disengages from one end of the buckle 4131, so that the gap 413b of the buckle 4131 is increased, and the buckle 4131 disengages from the first cylinder 411 and the second cylinder 412, realizing the separation of the first cylinder 411 and the second cylinder 412. After the first cylinder 411 and the second cylinder 412 are separated, the filter screen 42 is disassembled for cleaning or replacement of the filter screen 42.

[0038] For the above-mentioned first cylinder 411, the first cylinder 411 is provided with a filter groove, the filter screen 42 is arranged in the filter groove, and the second cylinder 412 covers the notch of the filter groove, so that the first cylinder 411 and the second cylinder 412 jointly enclose to form a second filter cavity 41a.

[0039] For the above-mentioned second cylinder 412, the second cylinder 412 is provided with a resisting portion 4121. When the clamp 413 clamps the first cylinder 411 and the second cylinder 412 and the first cylinder 411 and the second cylinder 412 are conducted, the resisting portion 4121 presses the filter screen 42 to reduce the risk of the filter screen 42 being displaced. In this embodiment, the resisting portion 4121 is annular and presses along the circumference of the filter screen 42 to make the filter screen 42 stable.

[0040] In some embodiments, a first connecting ring 4111 protrudes from the first cylinder 411, and a second connecting ring 4122 protrudes from the second cylinder 412. A fastening groove 413a is formed on the inner side of the clamp 413. When the clamp 413 clamps the first cylinder 411 and the second cylinder 412, both the first connecting ring 4111 and the second connecting ring 4122 are located in the fastening groove 413a, and the first connecting ring 4111 and the second connecting ring 4122 abut against each other, thereby restricting the risk that the first cylinder 411 deflects towards the second cylinder 412 or the second cylinder 412 deflects towards the first cylinder 411. In some embodiments, a first pressing inclined portion 4112 is provided at one end of the first connecting ring 4111 away from the second connecting ring 4122, and a second pressing inclined portion 4123 is provided at one end of the second connecting ring 4122 away from the first connecting ring 4111. Along the direction from the first cylinder 411 towards the second cylinder 412, the cross-sectional area of the first pressing inclined portion 4112 gradually increases, and the cross-sectional area of the second pressing inclined portion 4123 gradually decreases. When the gap 413b of the clamp 413 gradually becomes smaller, the opposite two wall surfaces of the fastening groove 413a respectively press the first pressing inclined portion 4112 and the second pressing inclined portion 4123, so that the first cylinder 411 and the second cylinder 412 move towards each other, thereby reducing the gap 413b between the first cylinder 411 and the second cylinder 412, and further improving the sealing performance of the cylinder assembly 41.

[0041] For the above-mentioned filter screen 42, the filter screen 42 is provided with a plurality of filter holes.

[0042] In some embodiments, please refer to Figure 4 and Figure 5 The third filtering mechanism 40 further includes a first sealing ring 43, and the first sealing ring 43 is disposed between the first cylinder 411 and the second cylinder 412. Specifically, a sealing groove is provided on the first connecting ring 4111, the first sealing ring 43 is inserted into the sealing groove, and a part of the first sealing ring 43 protrudes from the sealing groove. When the first cylinder 411 is connected to the second cylinder 412, the second connecting ring 4122 of the second cylinder 412 presses the first sealing ring 43, so that the first sealing ring 43 respectively abuts against the bottom of the sealing groove and the second connecting ring 4122 of the second cylinder 412 is pressed, thereby realizing the sealing between the first cylinder 411 and the second cylinder 412.

[0043] In some embodiments, please refer to Figure 5 The third filtering mechanism 40 further includes a second sealing ring 44, the second sealing ring 44 is sleeved on the abutting portion 4121, and one end of the second sealing ring 44 away from the abutting portion 4121 abuts against the wall surface of the first cylinder 411 at the filter groove 411a, further increasing the sealing performance between the first cylinder 411 and the second cylinder 412, and the first sealing ring 43 and the second sealing ring 44 jointly play a role of double sealing.

[0044] In some embodiments, please refer to Figure 4 Combined with Figure 5, the third filtering mechanism 40 further includes a buffer net 45 disposed between the second cylinder 412 and the filter net 42. When the second cylinder 412 inputs the object to be filtered and moves towards the first cylinder 411, the buffer net 45 can weaken the impact of the object to be filtered and protect the filter net 42. Specifically, the buffer net 45 includes a grid net 451 and a fixing ring 452. One end of the fixing ring 452 abuts against the filter net 42, and the grid net 451 is installed in the inner ring of the fixing ring 452. When the clamp 413 clamps the first cylinder 411 and the second cylinder 412 and the first cylinder 411 and the second cylinder 412 are communicated, the abutting portion 4121 of the second cylinder 412 presses the other end of the fixing ring 452 to make the fixing ring 452 press the filter net 42. In addition, the grid net 451 and the filter net 42 are arranged at intervals, and a deformation space is formed between the grid net 451 and the filter net 42. When the grid net 451 is impacted by the object to be filtered, the grid net 451 deforms or elastically deforms towards the deformation space.

[0045] In an embodiment of the present application, a filtering device 100 is provided. The filtering device 100 includes a pump 10, a first filtering mechanism 20, a second filtering mechanism 30, and a third filtering mechanism 40. The pump 10 is connected to the first filtering mechanism 20. The pump 10 can suck the object to be filtered and convey it to the first filtering mechanism 20. The first filtering mechanism 20 can filter out some impurities of the object to be filtered. The second filtering mechanism 30 includes a cylinder body 301 and a magnetic member 302. The magnetic member 302 is disposed in the cylinder body 301. One end of the cylinder body 301 is connected to the first filtering mechanism 20. The magnetic member 302 can magnetically attract the magnetizable body of the object to be filtered conveyed by the first filtering mechanism 20 to the cylinder body 301. The third filtering mechanism 40 is connected to the other end of the cylinder body 301. The third filtering mechanism 40 can filter out some impurities of the object to be filtered conveyed by the cylinder body 301 to the third filtering mechanism 40. Through the above structure, the user starts the pump 10. The pump 10 sucks the object to be filtered and conveys it to the first filtering mechanism 20. After the object to be filtered filters out some impurities in the first filtering mechanism 20, it flows to the cylinder body 301 of the second filtering mechanism 30. The magnetic member 302 can magnetically attract the magnetizable body in the object to be filtered, so that the magnetizable body adheres to the magnetic member 302 to achieve the effect of filtering impurities. Then, the object to be filtered flows from the cylinder body 301 of the second filtering mechanism 30 to the third filtering mechanism 40. The third filtering mechanism 40 filters the impurities of the object to be filtered again, thereby realizing the filtering of the impurities in the object to be filtered and further reducing the impurities in the object to be filtered.

[0046] It should be noted that the description and drawings of the present utility model provide preferred embodiments of the present utility model. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations to the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Moreover, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the description of the present utility model. Further, for those of ordinary skill in the art, improvements or transformations can be made based on the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A filtering device, characterized in that: include: A first filtering mechanism, used to filter some impurities of the object to be filtered; a pump, connected to the first filtering mechanism, and used for sucking the object to be filtered and delivering it to the first filtering mechanism; The second filtering mechanism comprises a cylinder and a magnetic member, wherein the magnetic member is arranged in the cylinder, one end of the cylinder is connected to the first filtering mechanism, and the magnetic member is used for magnetically attracting the object to be magnetically attracted that is transported to the cylinder by the first filtering mechanism; The third filtering mechanism is connected to the other end of the cylinder, and is used to filter part of the impurities of the object to be filtered that is transported by the cylinder to the third filtering mechanism.

2. The filtering device according to claim 1, characterized in that: The cylinder body is provided with a cylinder cavity; There are multiple magnetic parts, and the multiple magnetic parts are arranged at intervals along the circumference of the barrel cavity.

3. The filtering device according to claim 1, characterized in that: The first filter mechanism includes a first filter cartridge and a fiber filter core. The first filter cartridge is provided with a first filter cavity. The fiber filter core is arranged in the first filter cavity. One end of the first filter cartridge is connected to the pump, and the other end of the first filter cartridge is connected to the second filter mechanism.

4. The filtering device according to claim 1, characterized in that: The third filtering mechanism includes a barrel assembly and a filter screen, one end of the barrel assembly is connected to the other end of the barrel body, the other end of the barrel assembly is used for connection with external equipment, and the filter screen is arranged on the barrel assembly, and the filter screen is used to intercept impurities in the object to be filtered.

5. The filtering device according to claim 4, characterized in that: The barrel assembly includes a first barrel, a second barrel and a clamp, the first barrel and the second barrel are arranged opposite to each other, and the first barrel and the second barrel jointly enclose a second filter chamber, the filter screen is arranged in the second filter chamber, the first barrel is connected to an external device, the second barrel is connected to the other end of the barrel body, and the clamp is used to clamp or loosen the first barrel and the second barrel. When the clamp clamps the first barrel and the second barrel, the first barrel is conductive relative to the second barrel, and when the clamp loosens the first barrel and the second barrel, the first barrel is separated relative to the second barrel.

6. The filtering device according to claim 5, characterized in that: The clamp includes a retaining ring, a screw and a nut. The retaining ring is provided with a gap. Part of the retaining ring is sleeved on the first tube, and the other part of the retaining ring is sleeved on the second tube. The nut is connected to the retaining ring, and the nut is threaded on the screw. The nut is used to adjust the gap so that the retaining ring clamps or loosens the first tube and the second tube.

7. The filtering device according to claim 5, characterized in that: The third filtering mechanism further includes a first sealing ring, and the first sealing ring is arranged between the first cylinder and the second cylinder.

8. The filtering device according to claim 5, characterized in that: The first cylinder is provided with a filter slot, the filter screen is arranged in the filter slot, and the second cylinder cover is covered on the notch of the filter slot; The second cylinder is provided with a supporting portion, and the supporting portion is used to press the filter screen.

9. The filtering device according to claim 8, characterized in that: The third filtering mechanism further includes a second sealing ring, which is sleeved on the abutting portion, and one end of the second sealing ring away from the abutting portion abuts against the first cylinder.

10. The filtering device according to claim 5, characterized in that: The third filtering mechanism further includes a buffer net, which is disposed between the second cylinder and the filter net and is used to reduce the impact of the object to be filtered.

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