A single bag push-through filter

Abstract

The application provides a single-bag jacking filter which comprises a filter outer cylinder, a multi-direction mounting mechanism fixedly connected to the upper end surface of the filter outer cylinder, a quick connector mounted on one side of the multi-direction mounting mechanism, a reversing filter bag structure mounted in the filter outer cylinder, an adjusting rod structure movably connected to the surface of the reversing filter bag structure, a lower support frame fixedly connected to the lower end surface of the filter outer cylinder, an exhaust pipe fixedly connected to the lower end surface of the filter outer cylinder below the lower support frame, and a sampling valve mounted on the surface of the exhaust pipe, so as to solve the problem that the whole net basket and filter bag need to be taken down when the net basket and filter bag inside are replaced, and the problem that only one side of the filter bag can be used for filtering operation in the working process, and the use rate of the filter bag is low.

Description

Technical Field

[0001] This invention relates primarily to the field of filtration technology, and more specifically to a single-bag top-feed filter. Background Technology

[0002] Filters are widely used in chemical and other fields as filtration equipment. After a period of use, the filter bags need to be cleaned. However, the existing bag filter baskets and filter cloths have various installation structures, most of which are difficult to disassemble or cause secondary pollution during disassembly.

[0003] In the invention patent application CN201820939860.5, published on February 15, 2019, entitled "A Novel Top-Inlet Bag Filter," the device includes a cylindrical body, a support frame supporting the cylindrical body, and a top cover covering the top of the cylindrical body. An annular platform is located at the top end of the cylindrical body, and an annular protrusion is welded to the annular platform. A filter bag fixing ring is sealed and pressed onto the annular protrusion. A mesh basket and a filter bag are installed on the filter bag fixing ring, with the filter bag placed inside the mesh basket. The top cover has a feed inlet and a pressure gauge. The pressure gauge is located on one side of the top cover, and the feed inlet is located in the middle of the top cover. This device mounts the mesh basket and filter bag onto the filter bag fixing ring via a pressure ring. The filter bag fixing ring is sealed and pressed onto the annular protrusion, and a pull ring is provided on the filter bag fixing ring. During disassembly and cleaning, only the filter bag fixing ring needs to be pulled out, avoiding secondary pollution caused by disassembly being performed inside the cylindrical body.

[0004] During the operation of specific embodiments, the inventors discovered the following defects: when replacing the internal mesh basket and filter bag, the entire mesh basket and filter bag need to be removed; at the same time, during operation, filtration can only be performed using one side of the filter bag, resulting in low filter bag usage. Summary of the Invention

[0005] 1. The technical problem that the invention aims to solve: The present invention provides a single-bag top-feed filter to solve the problems in the prior art where the entire mesh basket and filter bag need to be removed when replacing them, and where filtration can only be performed using one side of the filter bag during operation, resulting in low filter bag usage.

[0006] 2. Technical Solution: To achieve the above objectives, the technical solution provided by the present invention is as follows: It includes a filter outer cylinder, a multi-directional mounting mechanism fixedly connected to the upper surface of the filter outer cylinder, a quick connector mounted on one side of the multi-directional mounting mechanism, a reversing filter bag structure installed inside the filter outer cylinder, an adjusting rod structure movably connected to the surface of the reversing filter bag structure, a lower support frame fixedly connected to the lower surface of the filter outer cylinder, an exhaust pipe fixedly connected below the lower support frame and below the lower surface of the filter outer cylinder, and a sampling valve mounted on the surface of the exhaust pipe.

[0007] Furthermore, the outer filter cylinder is installed inside the outer filter cylinder, the adjusting rod structure is movably connected to the center position of the top of the reversing filter bag structure, and the multi-directional installation mechanism and the surface of the reversing filter bag structure can be fitted with an attached flexible hose as needed.

[0008] Furthermore, the multi-directional mounting mechanism includes an annular cover ring, a crank tube fixedly connected to the front end surface of the annular cover ring, an mounting groove provided on the upper surface of the annular cover ring, threaded buckles provided on both sides of the annular cover ring, a flip cover movably connected to the rear end of the annular cover ring, an inner air duct provided on the lower surface of the flip cover, and mounting slots provided on both sides of the flip cover.

[0009] Furthermore, the inner air duct forms a flip structure on the surface of the mounting ring groove through a flip cover. The flip cover forms a sealing structure on the surface of the ring-shaped cover ring through mounting slots on both sides and threaded fasteners. The other end of the crank tube is connected to the inner air duct.

[0010] Furthermore, the reversing filter bag structure includes an upper top plate, with multiple air inlets distributed in a ring on the upper surface of the upper top plate. A mesh ring groove is provided on one side of the multiple air inlets on the surface of the upper top plate. A top rod insertion hole is provided at the center of the mesh ring groove. A lifting hole is provided on the surface of the mesh ring groove. A sealing turntable is movably connected to the lower surface of the upper top plate. A coarse mesh ring is provided on the surface of the lifting hole. A filter screen is installed on the lower surface of the coarse mesh ring. A snap-fit ​​short post is installed on the lower surface of the filter screen.

[0011] Furthermore, a push column is fixedly connected to the surface of the sealing turntable, and the multiple air inlets on the surface of the upper top plate are sealed or opened by the push column on the surface of the sealing turntable. The filter screen is suspended on the surface below the hanging hole by a coarse mesh ring. A spring is provided on the surface of the snap-fit ​​short column, and the diameter of the snap-fit ​​short column is smaller than the diameter of the hanging hole. An annular pressure plate is provided on the surface above the mesh mounting ring groove. An installation thread is provided on the surface of the top rod insertion hole, and the crank tube is fitted with an attached flexible hose through the installation thread on the surface of the top rod insertion hole.

[0012] Furthermore, the adjusting rod structure includes a discharge base at the bottom of the filter outer cylinder, a positioning magnetic suction hole on the upper surface of the discharge base, a telescopic top rod movably connected to the top rod insertion hole, a threaded rod on the upper surface of the telescopic top rod, a mounting handle threadedly connected to the threaded rod, a semi-circular sealing plate fixedly connected to the lower surface of the telescopic top rod, a rotating base movably connected to the bottom surface of the telescopic top rod, a positioning outer ring fixedly connected to the surface of the rotating base, a mesh mounting hole on the upper surface of the positioning outer ring, and a limit plate on one side of the mesh mounting hole above the positioning outer ring.

[0013] Furthermore, the telescopic top rod forms a lifting structure on the surface of the top rod insertion hole by manual operation. A semi-circular magnetic stone is provided on the lower surface of the positioning outer ring. The positioning outer ring is connected to the surface of the positioning magnetic hole through the semi-circular magnetic stone. The coarse mesh ring on the surface of the discharge base is installed on the surface of the mesh hole through the snap-fit ​​short post below it. The semi-circular sealing plate forms a rotating structure on the surface of the rotating base through the telescopic top rod. A ventilation semi-circular groove is provided between the rotating base and the positioning outer ring. The ventilation semi-circular groove is closed by the semi-circular sealing plate.

[0014] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this invention has the following advantages: This invention is rationally designed. During gas filtration, the flip-top cover in the multi-directional installation mechanism is sealed and fixed to the surface of the annular cover ring via a threaded fastener. The gas to be filtered enters the outer filter cylinder through the quick connector, crank tube, and inner air duct via multiple air inlets. At this time, the adjusting rod structure is installed on the surface of the top rod insertion hole. The telescopic top rod lowers and fixes the filter screen, which is installed on the surface of the positioning outer ring, above the discharge base. After being filtered by the filter screen, the gas passes through the ventilation semi-circular groove between the rotating base and the positioning outer ring, and is finally discharged through the exhaust pipe. When the position of the filter end needs to be changed, open the flip cover, rotate the sealing disc at the lower end of the top plate to seal it, and then rotate the installation handle above the discharge base. This will rotate the semi-circular sealing plate on the lower surface of the telescopic rod to the ventilation semi-circular groove position to close the flow channel. When the semi-circular sealing plate stops rotating when it reaches the limit plate position, the installation handle will be unscrewed from the threaded rod surface. At the same time, lift the positioning outer ring upwards to expose the discharge base. Install the attached hose between the crank tube and the rod insertion hole, and lift the coarse mesh ring from the mesh ring groove. The coarse mesh ring will drive the filter screen upwards, and finally, the annular pressure plate and the coarse mesh ring will fix the pulled-out filter screen inside the mesh ring groove. The gas to be filtered enters the filter screen through the crank tube, attached hose, and rod insertion hole for filtration. The filtered gas enters the exhaust pipe through the discharge base surface, achieving the purpose of using both the inner and outer ends of the filter screen. When the filter needs to be replaced, lift the telescopic rod upwards using the handle to retract the filter to below the lifting hole. The filter and the short locking post below it can then be removed simultaneously through the mesh ring groove. Install the short locking post below the new filter onto the mesh mounting hole surface, and then lower the retracting rod to complete the quick filter replacement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the multi-directional mounting mechanism of the present invention; Figure 3 This is a schematic diagram of the planar structure of the reversing filter bag of the present invention; Figure 4 This is a three-dimensional schematic diagram of the reversing filter bag structure of the present invention shrinking. Figure 5 This is a schematic diagram of the reversing filter bag of the present invention unfolding. Figure 6 This is a three-dimensional schematic diagram of the adjusting rod structure of the present invention.

[0016] Figure label: 1. Filter outer cylinder; 2. Multi-directional installation mechanism; 201. Ring-shaped cover; 202. Crank tube; 203. Mounting ring groove; 204. Threaded thread; 205. Flip-top cover; 206. Inner air duct; 207. Mounting slot; 3. Quick connector; 4. Reversing filter bag structure; 401. Top plate; 402. Multiple air inlets; 403. Mesh ring groove; 404. Top rod insertion hole; 405. Lifting hole; 406. Sealing turntable 407. Coarse mesh ring; 408. Filter screen; 409. Snap-fit ​​short post; 5. Adjusting rod structure; 501. Discharge base; 502. Positioning magnetic suction hole; 503. Telescopic top rod; 504. Threaded rod; 505. Installation handle; 506. Semi-circular sealing plate; 507. Rotating base; 508. Positioning outer ring; 509. Mesh installation hole; 510. Limiting plate; 6. Lower support frame; 7. Exhaust pipe; 8. Sampling valve; Detailed Implementation

[0017] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "page," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Example

[0021] See attached document Figure 1-6 The device includes an outer filter cylinder 1, a multi-directional mounting mechanism 2 fixedly connected to the upper surface of the outer filter cylinder 1, a quick connector 3 installed on one side of the multi-directional mounting mechanism 2, a reversing filter bag structure 4 installed inside the outer filter cylinder 1, an adjusting rod structure 5 movably connected to the surface of the reversing filter bag structure 4, a lower support frame 6 fixedly connected to the lower surface of the outer filter cylinder 1, an exhaust pipe 7 fixedly connected below the lower support frame 6 and below the lower surface of the outer filter cylinder 1, a sampling valve 8 installed on the surface of the exhaust pipe 7, the outer filter cylinder 1 is installed inside the outer filter cylinder 1, and the adjusting rod structure 5 is movably connected to the center of the top of the reversing filter bag structure 4. The multi-directional mounting mechanism 2 and the surface of the reversing filter bag structure 4 can be fitted with flexible hoses as needed. This device uses the multi-directional mounting mechanism 2 to replace the inner and outer surfaces of the filter screen 408, and the reversing filter bag structure 4 to achieve the purpose of quickly replacing the filter screen 408.

[0022] The multi-directional installation mechanism 2 includes an annular cover ring 201, a crank tube 202 fixedly connected to the front end surface of the annular cover ring 201, an installation ring groove 203 provided on the upper surface of the annular cover ring 201, threaded buckles 204 provided on both sides of the annular cover ring 201, a flip cover 205 movably connected to the rear end of the annular cover ring 201, an inner air duct 206 provided on the lower surface of the flip cover 205, and installation slots 207 provided on both sides of the flip cover 205. The inner air duct 206 forms a flip structure on the surface of the installation ring groove 203 through the flip cover 205. The flip cover 205 forms a sealing structure on the surface of the annular cover ring 201 through the installation slots 207 on both sides and the threaded buckles 204. The other end of the crank tube 202 is connected to the inner air duct 206.

[0023] In this embodiment, when the filter screen 408 needs to be replaced, the telescopic top rod 503 is lifted upward by installing the handle 505, causing the filter screen 408 to retract below the lifting hole 405. The filter screen 408 and the snap-fit ​​short post 409 below it can be removed simultaneously through the mesh ring groove 403. The snap-fit ​​short post 409 below the new filter screen 408 is installed on the surface of the mesh hole 509. Lowering the retracting top rod 503 completes the purpose of quickly replacing the filter screen 408.

[0024] The reversing filter bag structure 4 includes an upper top plate 401. Multiple air inlets 402 are annularly distributed on the upper surface of the upper top plate 401. A mesh ring groove 403 is provided on one side of each air inlet 402 on the surface of the upper top plate 401. A top rod insertion hole 404 is provided at the center of the mesh ring groove 403. A lifting hole 405 is provided on the surface of the mesh ring groove 403. A sealing turntable 406 is movably connected to the lower surface of the upper top plate 401. A coarse mesh ring 407 is provided on the surface of the lifting hole 405. A filter screen 408 is installed on the lower surface of the coarse mesh ring 407. A clip is installed on the lower surface of the filter screen 408. A short column 409 is connected to the surface of the sealing turntable 406, and a push column is fixedly connected to the surface of the sealing turntable 406. The multiple air inlets 402 on the surface of the upper top plate 401 are sealed or opened by the push column on the surface of the sealing turntable 406. The filter screen 408 is suspended on the surface below the hanging hole 405 by the coarse mesh ring 407. A spring is provided on the surface of the snap-fit ​​short column 409. The diameter of the snap-fit ​​short column 409 is smaller than the diameter of the hanging hole 405. An annular pressure plate is provided on the upper surface of the mesh mounting groove 403. The surface of the top rod insertion hole 404 is provided with an installation thread. The crank tube 202 is fitted with an attached hose through the installation thread on the surface of the top rod insertion hole 404.

[0025] In this embodiment, during gas filtration, the flip cover 205 in the multi-directional installation mechanism 2 is sealed and fixed to the surface of the annular cover ring 201 by the threaded buckle 204. The gas to be filtered enters the filter outer cylinder 1 through the quick connector 3, the crank tube 202 and the inner air duct 206 via the multi-inlet 402. At this time, the adjusting rod structure 5 is installed on the surface of the top rod insertion hole 404. The telescopic top rod 503 lowers and fixes the filter screen 408 installed on the surface of the positioning outer ring 508 above the base of the discharge base 501. After being filtered by the filter screen 408, the gas to be filtered passes through the ventilation semi-circular groove between the rotating base 507 and the positioning outer ring 508, and is finally discharged through the exhaust pipe 7.

[0026] The adjusting rod structure 5 includes a discharge base 501 at the bottom of the filter outer cylinder 1. A positioning magnetic hole 502 is provided on the upper surface of the discharge base 501. A telescopic top rod 503 is movably connected to the surface of the top rod insertion hole 404. A threaded rod 504 is provided on the upper surface of the telescopic top rod 503, and a mounting handle 505 is threaded onto the surface of the threaded rod 504. A semi-circular sealing plate 506 is fixedly connected to the lower surface of the telescopic top rod 503. A rotating base 507 is movably connected to the bottom surface of the telescopic top rod 503. A positioning outer ring 508 is fixedly connected to the surface of the rotating base 507. A mesh mounting hole 509 is provided on the upper surface of the positioning outer ring 508. A mesh mounting hole 509 is provided on one side of the mesh mounting hole 509. A limiting plate 510 is provided on the upper surface of the positioning outer ring 508. The telescopic top rod 503 forms a lifting structure on the surface of the top rod insertion hole 404 by manual operation. A semi-circular magnetic stone is provided on the lower surface of the positioning outer ring 508. The positioning outer ring 508 is connected to the surface of the positioning magnetic hole 502 through the semi-circular magnetic stone. The coarse mesh ring 407 on the surface of the discharge base 501 is installed on the surface of the mesh hole 509 through the snap-fit ​​short post 409 below it. The semi-circular sealing plate 506 forms a rotating structure on the surface of the rotating base 507 through the telescopic top rod 503. A ventilation semi-circular groove is provided between the rotating base 507 and the positioning outer ring 508. The ventilation semi-circular groove is closed by the semi-circular sealing plate 506.

[0027] In this embodiment, when it is necessary to change the position of the filter end of the filter screen 408, the flip cover 205 is opened, the sealing turntable 406 at the lower end of the upper top plate 401 is rotated to seal it, and then the installation handle 505 above the discharge base 501 is rotated, causing the semi-circular sealing plate 506 on the lower surface of the telescopic top rod 503 to rotate to the position of the ventilation semi-circular groove to close the flow channel. When the semi-circular sealing plate 506 is rotated to the position of the limiting plate 510, it stops rotating, thereby causing the installation handle 505 to be unscrewed from the surface of the threaded rod 504. At the same time, the positioning outer ring 508 is lifted upwards, so that the discharge base 501... 1. The attached hose is installed between the crank tube 202 and the push rod insertion hole 404. The coarse mesh ring 407 is lifted from the mesh ring groove 403. The coarse mesh ring 407 drives the filter screen 408 to move upward. Finally, the annular pressure plate and the coarse mesh ring 407 fix the pulled-out filter screen 408 inside the mesh ring groove 403. The gas to be filtered enters the filter screen 408 through the crank tube 202, the attached hose and the push rod insertion hole 404 for filtration. The filtered gas enters the exhaust pipe 7 through the surface of the discharge base 501, realizing the purpose of using both the inner and outer ends of the filter screen 408.

[0028] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A single-bag top-feed filter, characterized in that: The filter includes an outer filter cylinder (1), a multi-directional mounting mechanism (2) is fixedly connected to the upper surface of the outer filter cylinder (1), a quick connector (3) is installed on one side of the multi-directional mounting mechanism (2), a reversing filter bag structure (4) is installed inside the outer filter cylinder (1), an adjusting rod structure (5) is movably connected to the surface of the reversing filter bag structure (4), a lower support frame (6) is fixedly connected to the lower surface of the outer filter cylinder (1), an exhaust pipe (7) is fixedly connected below the lower support frame (6) to the lower surface of the outer filter cylinder (1), and a sampling valve (8) is installed on the surface of the exhaust pipe (7). The reversing filter bag structure (4) includes an upper top plate (401), with multiple air inlets (402) distributed in a ring on the upper surface of the upper top plate (401). A mesh ring groove (403) is provided on one side of the multiple air inlets (402) on the surface of the upper top plate (401). A top rod insertion hole (404) is provided at the center of the mesh ring groove (403). A sealing turntable (406) is movably connected to the lower surface of the upper top plate (401). A filter screen (408) is suspended below the mesh ring groove (403). A lifting hole (405) is provided on the surface of the mesh ring groove (403). A coarse mesh ring (407) is provided on the surface of the lifting hole (405). The filter screen (408) is installed on the lower surface of the coarse mesh ring (407). A snap-fit ​​short post (409) is installed on the lower surface of the filter screen (408). The adjusting rod structure (5) includes a discharge base (501) at the bottom of the filter outer cylinder (1), a positioning magnetic suction hole (502) is provided on the upper surface of the discharge base (501), a telescopic top rod (503) is movably connected to the surface of the top rod insertion hole (404), an installation handle (505) is provided at the upper end of the telescopic top rod (503), a semi-circular sealing plate (506) is fixedly connected to the lower surface of the telescopic top rod (503), a rotating base (507) is movably connected to the bottom surface of the telescopic top rod (503), a positioning outer ring (508) is fixedly connected to the surface of the rotating base (507), a ventilation semi-circular groove is provided between the positioning outer ring (508) and the rotating base (507), and the ventilation semi-circular groove is controlled to open and close by the semi-circular sealing plate (506); the lower end of the filter screen (408) is installed on the positioning outer ring (508). The telescopic top rod (503) can drive the filter screen (408) to move up and down, and can drive the semi-circular sealing plate (506) to rotate and switch the ventilation semi-circular groove. In conjunction with the sealing turntable (406) to switch the opening and closing of the multiple air inlets (402), the filter screen can achieve bidirectional filtration switching on both the inner and outer sides.

2. A single-bag top-feed filter according to claim 1, characterized in that: The filter outer cylinder (1) is installed inside the filter outer cylinder (1), the adjustment rod structure (5) is movably connected to the center of the top of the reversing filter bag structure (4), and the multi-directional installation mechanism (2) and the surface of the reversing filter bag structure (4) can be fitted with a hose as needed.

3. A single-bag top-feed filter according to claim 1, characterized in that: The multi-directional installation mechanism (2) includes an annular cover ring (201), a crank tube (202) is fixedly connected to the front end surface of the annular cover ring (201), an installation ring groove (203) is provided on the upper surface of the annular cover ring (201), threaded buckles (204) are provided on both sides of the annular cover ring (201), a flip cover (205) is movably connected to the rear end of the annular cover ring (201), an inner air duct (206) is provided on the lower surface of the flip cover (205), and installation slots (207) are provided on both sides of the flip cover (205).

4. A single-bag top-feed filter according to claim 3, characterized in that: The inner air duct (206) forms a flip structure on the surface of the mounting ring groove (203) through the flip cover (205). The flip cover (205) forms a sealing structure on the surface of the ring cover (201) through the mounting slots (207) on both sides and the threaded buckle (204). The other end of the crank tube (202) is connected to the inner air duct (206).

5. A single-bag top-feed filter according to claim 4, characterized in that: The sealing turntable (406) is fixedly connected to a push column. The multiple air inlets (402) on the surface of the upper top plate (401) are sealed or opened by the push column on the surface of the sealing turntable (406). The filter screen (408) is suspended on the surface below the hanging hole (405) by a coarse mesh ring (407). The surface of the snap-fit ​​short column (409) is provided with a spring piece. The diameter of the snap-fit ​​short column (409) is smaller than the diameter of the hanging hole (405). The surface above the mesh ring groove (403) is provided with an annular pressure plate. The surface of the top rod insertion hole (404) is provided with an installation thread. The crank tube (202) is installed with an attached hose through the installation thread on the surface of the top rod insertion hole (404).

6. A single-bag top-feed filter according to claim 1, characterized in that: A threaded rod (504) is provided on the upper surface of the telescopic top rod (503), and the mounting handle (505) is threadedly connected to the surface of the threaded rod (504). A mesh hole (509) is provided on the upper surface of the positioning outer ring (508), and a limit plate (510) is provided on one side surface of the mesh hole (509) and the upper surface of the positioning outer ring (508).

7. A single-bag top-feed filter according to claim 6, characterized in that: The telescopic top rod (503) forms a lifting structure on the surface of the top rod insertion hole (404) by manual operation. The lower surface of the positioning outer ring (508) is provided with a semi-circular magnetic stone. The positioning outer ring (508) is connected to the surface of the positioning magnetic hole (502) through the semi-circular magnetic stone. The coarse mesh ring (407) on the surface of the discharge base (501) is installed on the surface of the mesh hole (509) through the snap-fit ​​short post (409) below it. The semi-circular sealing plate (506) forms a rotating structure on the surface of the rotating base (507) through the telescopic top rod (503).

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