CN118006442A - Fine filtering device for microorganism culture - Google Patents

Abstract

The invention discloses a fine filtering device for microorganism culture, and relates to the technical field of filtering devices. This kind of microorganism is cultivateed with meticulous filter equipment, including setting up vacuum pump, long tube and discharging pipe on the suction filtration device body, still include: the annular cover that the cavity set up, the annular cover sets up in the top of discharging pipe, and the absorption hole that a plurality of arrays set up has been seted up to the inside wall of annular cover, the upper end of discharging pipe is provided with the toper cover, and the bottom fixedly connected with fretwork dish of toper cover. This kind of microorganism cultivates with meticulous filter equipment can absorb and by meticulous filtration on the filter membrane to the microorganism that distributes to the air, not only can guarantee microorganism cultivate the effect, can avoid moreover causing the pollution to the air, and environmental protection is healthy more to, can reciprocating the vibrations of beating to the lateral wall of filter bowl, not only can improve filterable efficiency, can avoid treating the inner wall of detection liquid sample adhesion at the filter bowl moreover, guarantee filterable effect.

Description

A fine filtration device for microbial cultivation

Technical Field

The invention relates to the technical field of filtering devices, in particular to a fine filtering device for microbial cultivation.

Background technique

Microorganisms exist in a wide range of environments, such as food, cosmetics, feed, etc. The contamination of products by certain microorganisms not only affects the quality of the products themselves, but more seriously endangers the health and safety of consumers. Therefore, it is necessary to test the microorganisms in the products. Depending on the product, the types and indicators of the tested microorganisms are also different, that is, the test items are different. Commonly tested items include: mold and yeast count test, pathogenic bacteria test, total bacteria test, etc. In some microbial test items, it is necessary to filter the samples and test the filtered samples and filtrate. At this time, it is necessary to use a filtration device to finely filter the test liquid sample and culture the filtered microorganisms.

However, when the existing fine filtration device for microbial culture is in use, the test liquid sample poured into the filter cup will be dispersed into the air to form an aerosol, which not only affects the test results but also causes air pollution, which is not healthy and environmentally friendly.

Summary of the invention

The object of the present invention is to provide a fine filtration device for microorganism cultivation to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solution: a fine filtration device for microbial culture, comprising a vacuum pump, a long tube and a discharge pipe arranged on a suction filtration device body, and further comprising:

A hollow annular cover, which is arranged above the discharge pipe, and the inner side wall of the annular cover is provided with a plurality of absorption holes arranged in an array, a conical cover is arranged at the upper end of the discharge pipe, and a hollow plate is fixedly connected to the bottom of the conical cover, a filter membrane is placed on the top of the hollow plate, and a conical filter cup is inserted in the hollow plate;

A telescopic mechanism, which is used to connect and fix the conical cover to the discharge pipe, and is arranged on the top of the discharge pipe;

An air extraction mechanism, which is used to drive the absorption holes to extract air and is arranged at the bottom of the annular cover;

A lifting mechanism, used for lifting the annular cover, the lifting mechanism being arranged on a side wall of the annular cover;

A vibration mechanism is provided on one side of the filter cup and is used for knocking and vibrating the side wall of the filter cup.

Preferably, the telescopic mechanism comprises a telescopic tube fixedly connected to the upper end of the discharge tube, the upper end of the telescopic tube is connected to the moving tube via a first reset mechanism, and the conical cover is fixed to the upper end of the moving tube.

Preferably, the first reset mechanism includes a first connecting plate fixedly connected to the side wall of the discharge pipe, and two symmetrically arranged first sleeve rods are fixedly connected to the top of the first connecting plate, the side wall of the first sleeve rod is sleeved with a first sleeve, and the upper end of the first sleeve is fixedly connected to a second connecting plate, the second connecting plate is fixed to the side wall of the movable tube, and the side wall of the first sleeve is sleeved with a first spring.

Preferably, the exhaust mechanism includes a trapezoidal partition fixedly connected to the bottom of the annular cover, and the side wall of the partition is fixedly connected to a fan-shaped cover, an exhaust pipe is fixedly inserted into the top of the fan-shaped cover, and the other end of the exhaust pipe is fixedly inserted into the side wall of the annular cover.

Preferably, the lifting mechanism includes a third connecting plate fixedly connected to the side wall of the annular cover, and the bottom of the third connecting plate is fixedly connected to a second sleeve rod, the side wall of the second sleeve rod is sleeved with a second sleeve, and the lower end of the second sleeve is fixed to the top of the second connecting plate, the top of the second connecting plate is fixedly connected to a threaded tube, and a threaded rod is threadedly connected to the inner thread of the threaded tube, the upper end of the threaded rod is rotatably connected to the bottom of the third connecting plate, and the rotation of the threaded rod is driven by a driving mechanism.

Preferably, the driving mechanism includes a rocking wheel, and the upper end of the threaded rod passes through the top of the third connecting plate and is fixed to the bottom of the rocking wheel.

Preferably, the vibration mechanism includes an inclined movable plate, and the side wall of the movable plate is fixedly connected with a plurality of rubber rods arranged in an array, the movable plate is connected to the top of the second connecting plate through a second reset mechanism, and the movement of the movable plate is driven by a driving mechanism.

Preferably, the second reset mechanism includes a support plate fixedly connected to the top of the second connecting plate, and the top of the support plate is fixedly connected to an inclined plate, the side wall of the inclined plate is fixedly connected to two symmetrically arranged T-shaped guide rods, and the side wall of the T-shaped guide rod is sleeved with a connecting block, the connecting block is fixed to the side wall of the movable plate, and the side wall of the T-shaped guide rod is sleeved with a second spring.

Preferably, the pushing mechanism includes a notch opened in the side wall of the exhaust pipe, and an installation box is fixedly inserted in the notch, the bottom of the installation box is rotatably connected to a rotating rod through a driving assembly, the lower end of the rotating rod is fixedly connected to a cam, and the top of the movable plate is fixedly connected to a pushing plate.

Preferably, the driving assembly includes a driving shaft rotatably connected in the installation box, a side wall fixing sleeve of the driving shaft is provided with a rotating fan, and the lower end of the driving shaft passes through the bottom of the installation box and is fixed to the upper end of the rotating rod.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The fine filtration device for microbial culture is provided with an air extraction mechanism, etc., and when in use, the filter membrane is first placed on the hollow disk, then the filter cup is inserted into the conical cover, and then the rocker is rotated. The rotation of the rocker drives the threaded rod to rotate, so that the second set of rods moves downward, and the annular cover is driven downward through the third connecting plate, so that the partition is inserted into the filter cup, so that the partition is against the inner wall of the filter cup, and the bottom of the partition is against the top of the filter membrane. At the same time, the fan-shaped cover is against the top of the filter cup, so that the filter cup can be pressed tightly, which is more stable and reliable, and the filter cup can be divided. The filter cup has a filtrate area and a vacuum area. Then, the liquid sample to be tested is poured into the filter cup, and the vacuum pump is started for vacuum treatment. At this time, the microorganisms in the test liquid sample are finely filtered on the filter membrane. At the same time, the vacuum area and the fan-shaped cover of the filter cup are vacuumed, and the annular cover is vacuumed through the vacuum pipe, and then the absorption holes are vacuumed, so that the microorganisms dispersed in the air can be absorbed and finely filtered on the filter membrane after passing through the vacuum pipe and the fan-shaped cover. This can not only ensure the effect of microbial cultivation, but also avoid air pollution, which is more environmentally friendly and healthy.

(2) The fine filtering device for microorganism cultivation is provided with a vibration mechanism, etc., so that when fine filtering is performed, when the annular cover and the fan-shaped cover move downward, the installation box and the cam are driven to move downward synchronously. When the fan-shaped cover abuts against the top of the filter cup, the cam moves to the push plate. When air enters the installation box through the exhaust pipe, it impacts the surface of the rotating fan to cause it to rotate. At the same time, when the rotating fan rotates, it drives the driving shaft and the rotating rod to rotate, and then drives the cam to rotate. When the tip of the cam abuts against the side wall of the push plate, it can push the moving plate and the rubber rod to move in the direction close to the filter cup. At the same time, the second spring is compressed. When the tip of the cam passes over the side wall of the push plate, the moving plate and the rubber rod can move and reset under the action of the second spring. In this way, the rubber rod can reciprocate and knock and vibrate the side wall of the filter cup, which can not only improve the filtration efficiency, but also prevent the liquid sample to be detected from adhering to the inner wall of the filter cup, thereby ensuring the filtration effect.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the overall structure of the present invention;

FIG2 is a schematic diagram of the overall structure of the fan-shaped cover in the present invention;

FIG3 is a schematic structural diagram of a lifting mechanism and a first reset mechanism in the present invention;

FIG4 is an enlarged schematic diagram of the structure at A in FIG1 ;

FIG5 is an enlarged schematic diagram of the structure at B in FIG3;

FIG6 is an enlarged schematic diagram of the structure at C in FIG3 and a cross-sectional schematic diagram of the driving mechanism;

FIG7 is an enlarged schematic diagram of the structure at D in FIG4 ;

FIG8 is an enlarged schematic diagram of the structure at E in FIG5 ;

FIG. 9 is an enlarged structural schematic diagram of point F in FIG. 6 .

In the figure: 1. filtration device body; 101. vacuum pump; 102. long tube; 103. discharge tube; 2. lifting mechanism; 201. third connecting plate; 202. second set of rods; 203. second sleeve; 204. threaded tube; 205. threaded rod; 3. first reset mechanism; 301. first connecting plate; 302. first sleeve; 303. first set of rods; 304. first spring; 305. second connecting plate; 4. vibration mechanism; 401. moving plate; 402. rubber rod; 5. second reset mechanism; 501. support plate; 502. inclined plate; 5 ...504. first set of rods; 505. first set of rods; 505. first set of rods; 506. first set of rods; 507. first set of rods; 508. first set of rods; 509. first set of rods; 510. first set of rods; 511. first set of rods; 512. first set of rods; 513. first set of rods; 514. first set of rods; 515. first set of rods; 516. first set of rods; 517. first set of rods; 518. first set of rods; 519. first set of rods; 520. first set of rods; 521. first set of rods; 522. first set of rods; 523. 03. T-shaped guide rod; 504. connecting block; 505. second spring; 6. exhaust mechanism; 601. partition; 602. fan-shaped cover; 603. exhaust pipe; 7. pushing mechanism; 701. notch; 702. installation box; 703. rotating rod; 704. cam; 705. pushing plate; 8. driving assembly; 801. driving shaft; 802. rotating fan; 9. telescopic mechanism; 901. telescopic tube; 902. moving tube; 10. rocker; 11. filter cup; 12. annular cover; 13. absorption hole; 14. filter membrane; 15. conical cover; 16. hollow disk.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Referring to FIGS. 1 to 9 , the present invention provides a technical solution: a fine filtration device for microbial culture, comprising a vacuum pump 101, a long tube 102 and a discharge pipe 103 arranged on a suction filtration device body 1, and further comprising:

A hollow annular cover 12 is arranged above the discharge pipe 103, and a plurality of absorption holes 13 arranged in an array are opened on the inner side wall of the annular cover 12. A conical cover 15 is arranged at the upper end of the discharge pipe 103, and a hollow plate 16 is fixedly connected to the bottom of the conical cover 15, a filter membrane 14 is placed on the top of the hollow plate 16, and a conical filter cup 11 is inserted into the hollow plate 16;

The telescopic mechanism 9 is used to connect and fix the conical cover 15 and the discharge pipe 103. The telescopic mechanism 9 is arranged on the top of the discharge pipe 103;

The air extraction mechanism 6 is used to drive the absorption hole 13 to extract air. The air extraction mechanism 6 is arranged at the bottom of the annular cover 12;

A lifting mechanism 2 for lifting the annular cover 12 is arranged on the side wall of the annular cover 12;

The vibration mechanism 4 is used to knock and vibrate the side wall of the filter cup 11. The vibration mechanism 4 is set on one side of the filter cup 11, which can absorb the microorganisms dispersed in the air and be finely filtered on the filter membrane 14, which can not only ensure the effect of microorganism cultivation, but also avoid air pollution, which is more environmentally friendly and healthy. In addition, the side wall of the filter cup 11 can be knocked and vibrated back and forth, which can not only improve the filtration efficiency, but also avoid the liquid sample to be detected from adhering to the inner wall of the filter cup 11, thereby ensuring the filtration effect.

Please refer to Figures 4 and 5. The telescopic mechanism 9 includes a telescopic tube 901 fixedly connected to the upper end of the discharge pipe 103. The upper end of the telescopic tube 901 is connected to the movable tube 902 through the first reset mechanism 3, and the conical cover 15 is fixed to the upper end of the movable tube 902. When the vibration mechanism 4 knocks and vibrates the filter cup 11, and under the action of the first reset mechanism 3, a relative displacement occurs between the movable tube 902 and the discharge pipe 103. At the same time, the telescopic tube 901 is deformed, so that the filter cup 11 can be shaken, making the filtration efficiency higher.

Please refer to Figure 3, the first reset mechanism 3 includes a first connecting plate 301 fixedly connected to the side wall of the discharge pipe 103, and the top of the first connecting plate 301 is fixedly connected to two symmetrically arranged first sleeve rods 303, the side wall of the first sleeve rod 303 is sleeved with a first sleeve 302, and the upper end of the first sleeve 302 is fixedly connected with a second connecting plate 305, the second connecting plate 305 is fixed to the side wall of the moving tube 902, and the side wall of the first sleeve 302 is sleeved with a first spring 304, which guides and resets the movement of the moving tube 902.

Please refer to Figures 2 to 4. The air extraction mechanism 6 includes a partition plate 601 fixedly connected to the bottom of the annular cover 12 and arranged in a trapezoidal shape, and the side wall of the partition plate 601 is fixedly connected to a fan-shaped cover 602, and an air extraction pipe 603 is fixedly inserted at the top of the fan-shaped cover 602, and the other end of the air extraction pipe 603 is fixedly inserted at the side wall of the annular cover 12. When in use, the filter membrane 14 is first placed on the hollow disk 16, and then the filter cup 11 is inserted into the conical cover 15, and then the annular cover 12 is driven downward by the lifting mechanism 2, so that the partition plate 601 is inserted into the filter cup 11, so that the partition plate 601 is abutted against the inner wall of the filter cup 11, and the bottom of the partition plate 601 is abutted against the top of the filter membrane 14. At the same time, the fan-shaped cover 602 is abutted against the top of the filter cup 11, which can The filter cup 11 is pressed to be more stable and reliable, and the filter cup 11 can be divided into a filtrate area and a vacuum area. Then, the liquid sample to be tested is poured into the filter cup 11, and the vacuum pump 101 is started for vacuuming. At this time, the microorganisms in the test liquid sample are finely filtered on the filter membrane 14. At the same time, the vacuum area of the filter cup 11 and the fan-shaped cover 602 are vacuumed, and the annular cover 12 is vacuumed through the vacuum pipe 603, and then the absorption hole 13 is vacuumed, so that the microorganisms dispersed in the air can be absorbed and finely filtered on the filter membrane 14 after passing through the vacuum pipe 603 and the fan-shaped cover 602. This can not only ensure the effect of microbial cultivation, but also avoid air pollution, which is more environmentally friendly and healthy.

Please refer to Figures 3 and 6. The lifting mechanism 2 includes a third connecting plate 201 fixedly connected to the side wall of the annular cover 12, and the bottom of the third connecting plate 201 is fixedly connected with a second rod 202, the side wall of the second rod 202 is sleeved with a second sleeve 203, and the lower end of the second sleeve 203 is fixed to the top of the second connecting plate 305, the top of the second connecting plate 305 is fixedly connected with a threaded tube 204, and the threaded tube 204 is internally threaded with a threaded rod 205, the upper end of the threaded rod 205 is rotatably connected to the bottom of the third connecting plate 201, and the rotation of the threaded rod 205 is driven by a driving mechanism, and the threaded rod 205 is driven to rotate by the driving mechanism, and the rotation of the threaded rod 205 causes the second rod 202 to move downward, and drives the annular cover 12 to move downward through the third connecting plate 201, so that the partition 601 is inserted into the filter cup 11.

Please refer to FIG. 6 , the driving mechanism includes a rocking wheel 10 , and the upper end of the threaded rod 205 passes through the top of the third connecting plate 201 and is fixed to the bottom of the rocking wheel 10 . When the rocking wheel 10 is rotated, the rotation of the rocking wheel 10 drives the rotation of the threaded rod 205 .

Please refer to Figures 2 and 5. The vibration mechanism 4 includes a tilted movable plate 401, and the side wall of the movable plate 401 is fixedly connected to a plurality of rubber rods 402 arranged in an array. The movable plate 401 is connected to the top of the second connecting plate 305 through the second reset mechanism 5, and the movement of the movable plate 401 is driven by the pushing mechanism 7. The movable plate 401 and the rubber rod 402 are reciprocated by the pushing mechanism 7 and the second reset mechanism 5, so that the rubber rod 402 reciprocates and knocks the side wall of the filter cup 11 to vibrate, which can not only improve the filtration efficiency, but also prevent the liquid sample to be detected from adhering to the inner wall of the filter cup 11, thereby ensuring the filtration effect.

Please refer to Figure 1, the second reset mechanism 5 includes a support plate 501 fixedly connected to the top of the second connecting plate 305, and the top of the support plate 501 is fixedly connected to an inclined plate 502, the side wall of the inclined plate 502 is fixedly connected to two symmetrically arranged T-shaped guide rods 503, and the side wall of the T-shaped guide rod 503 is sleeved with a connecting block 504, the connecting block 504 is fixed to the side wall of the movable plate 401, and the side wall of the T-shaped guide rod 503 is sleeved with a second spring 505, which guides and resets the movement of the movable plate 401.

Please refer to Figures 5 to 7 and 9. The pushing mechanism 7 includes a notch 701 opened on the side wall of the exhaust pipe 603, and a mounting box 702 is fixedly inserted in the notch 701. The bottom of the mounting box 702 is rotatably connected to a rotating rod 703 through a driving assembly 8. The lower end of the rotating rod 703 is fixedly connected to a cam 704, and the top of the movable plate 401 is fixedly connected to a pushing plate 705. When fine filtering is performed, when the annular cover 12 and the fan-shaped cover 602 move downward, the mounting box 702 and the cam 704 are driven to move downward synchronously. When the fan-shaped cover 602 abuts against the top of the filter cup 11, the rotating rod 703 and the cam 704 are driven to rotate through the driving assembly 8. When the tip of the cam 704 abuts against the side wall of the pushing plate 705, the movable plate 401 and the rubber rod 402 can be pushed to move in a direction close to the filter cup 11.

Please refer to Figure 9. The driving assembly 8 includes a driving shaft 801 rotatably connected to the installation box 702. The side wall of the driving shaft 801 is fixedly sleeved with a rotating fan 802, and the lower end of the driving shaft 801 passes through the bottom of the installation box 702 and is fixed to the upper end of the rotating rod 703. When air enters the installation box 702 through the exhaust pipe 603, it impacts the surface of the rotating fan 802 to cause it to rotate. At the same time, the rotating fan 802 rotates, driving the driving shaft 801 and the rotating rod 703 to rotate, thereby driving the cam 704 to rotate.

Working principle: when in use, first place the filter membrane 14 on the hollow disk 16, then insert the filter cup 11 into the conical cover 15, and then rotate the rocker 10. The rotation of the rocker 10 drives the threaded rod 205 to rotate, so that the second set of rods 202 moves downward, and drives the annular cover 12 to move downward through the third connecting plate 201, so that the partition 601 is inserted into the filter cup 11, so that the partition 601 abuts against the inner wall of the filter cup 11, and the bottom of the partition 601 abuts against the top of the filter membrane 14. At the same time, the fan-shaped cover 602 abuts against the top of the filter cup 11, which can compress the filter cup 11, making it more stable and reliable, and can divide the filter cup 11 into a filtrate area and a suction area;

Next, the liquid sample to be tested is poured into the filter cup 11, and the vacuum pump 101 is started for vacuuming. At this time, the microorganisms in the test liquid sample are finely filtered on the filter membrane 14. At the same time, the air extraction area of the filter cup 11 and the fan-shaped cover 602 are evacuated, and the annular cover 12 is evacuated through the air extraction pipe 603, so that the absorption hole 13 is evacuated, so that the microorganisms dispersed in the air can be absorbed and finely filtered on the filter membrane 14 after passing through the air extraction pipe 603 and the fan-shaped cover 602, which can not only ensure the effect of microorganism cultivation, but also avoid air pollution, which is more environmentally friendly and healthy.

Furthermore, when the annular cover 12 and the fan-shaped cover 602 move downward, the installation box 702 and the cam 704 move downward synchronously. When the fan-shaped cover 602 abuts against the top of the filter cup 11, the cam 704 moves to the push plate 705. When air enters the installation box 702 through the exhaust pipe 603, it impacts the surface of the rotating fan 802 to rotate it. At the same time, when the rotating fan 802 rotates, it drives the driving shaft 801 and the rotating rod 703 to rotate, thereby driving the cam 704 to rotate. When the tip of the cam 704 touches the push plate 705, the rotating fan 802 rotates. When the side wall of the filter cup 11 abuts against the side wall of the filter cup 11, the movable plate 401 and the rubber rod 402 can be pushed to move toward the filter cup 11. At the same time, the second spring 505 is compressed. When the tip of the cam 704 passes over the side wall of the push plate 705, the movable plate 401 and the rubber rod 402 can be moved and reset under the action of the second spring 505. In this way, the rubber rod 402 can reciprocately knock and vibrate the side wall of the filter cup 11, which can not only improve the filtration efficiency, but also prevent the liquid sample to be detected from adhering to the inner wall of the filter cup 11, thereby ensuring the filtration effect.

After the fine filtration is completed, the filter membrane 14 is moved to a plate and a label is written on it. Finally, the plate is placed in an incubator for incubation.

Claims (10)

1. The utility model provides a microorganism is cultivateed with meticulous filter equipment, includes vacuum pump (101), long tube (102) and discharging pipe (103) that set up on suction filtration device body (1), its characterized in that: further comprises:

the device comprises a hollow annular cover (12), wherein the annular cover (12) is arranged above a discharge pipe (103), a plurality of absorption holes (13) arranged in an array are formed in the inner side wall of the annular cover (12), a conical cover (15) is arranged at the upper end of the discharge pipe (103), a hollowed-out disc (16) is fixedly connected to the bottom of the conical cover (15), a filter membrane (14) is arranged at the top of the hollowed-out disc (16), and a filter cup (11) arranged in a conical manner is inserted in the hollowed-out disc (16);

The telescopic mechanism (9) is used for connecting and fixing the conical cover (15) and the discharging pipe (103), and the telescopic mechanism (9) is arranged at the top of the discharging pipe (103);

the air extraction mechanism (6) is used for driving the absorption holes (13) to carry out air extraction, and the air extraction mechanism (6) is arranged at the bottom of the annular cover (12);

A lifting mechanism (2), wherein the lifting mechanism (2) for lifting the annular cover (12) is arranged on the side wall of the annular cover (12);

The vibration mechanism (4) is used for knocking and vibrating the side wall of the filter bowl (11), and the vibration mechanism (4) is arranged on one side of the filter bowl (11).

2. The fine filtration device for microorganism culture according to claim 1, wherein: the telescopic mechanism (9) comprises a telescopic pipe (901) fixedly connected to the upper end of the discharging pipe (103), the upper end of the telescopic pipe (901) is connected with a movable pipe (902) through a first reset mechanism (3), and the conical cover (15) is fixed to the upper end of the movable pipe (902).

3. A fine filtration device for microorganism culture according to claim 2, wherein: the first reset mechanism (3) comprises a first connecting plate (301) fixedly connected to the side wall of the discharging pipe (103), two symmetrically arranged first sleeve rods (303) are fixedly connected to the top of the first connecting plate (301), first sleeves (302) are sleeved on the side wall of the first sleeve rods (303), second connecting plates (305) are fixedly connected to the upper ends of the first sleeves (302), the second connecting plates (305) are fixed to the side wall of the moving pipe (902), and first springs (304) are sleeved on the side wall of the first sleeves (302).

4. The fine filtration device for microorganism culture according to claim 1, wherein: the air extraction mechanism (6) comprises a baffle plate (601) fixedly connected to the bottom of the annular cover (12) and in a trapezoid shape, a fan-shaped cover (602) is fixedly connected to the side wall of the baffle plate (601), an air extraction pipe (603) is fixedly inserted into the top of the fan-shaped cover (602), and the other end of the air extraction pipe (603) is fixedly inserted into the side wall of the annular cover (12).

5. A fine filtration device for microorganism culture according to claim 3, wherein: elevating system (2) are including fixed connection at third connecting plate (201) of annular cover (12) lateral wall, and the bottom fixedly connected with second loop bar (202) of third connecting plate (201), the lateral wall cover of second loop bar (202) is equipped with second sleeve pipe (203), and the lower extreme of second sleeve pipe (203) is fixed with the top of second connecting plate (305), the top fixedly connected with screwed pipe (204) of second connecting plate (305), and screwed pipe (204) internal thread connection has threaded rod (205), the upper end of threaded rod (205) is rotated with the bottom of third connecting plate (201) and is connected, and the rotation of threaded rod (205) is driven through actuating mechanism.

6. The fine filtration device for microorganism culture according to claim 5, wherein: the driving mechanism comprises a rocking wheel (10), and the upper end of a threaded rod (205) penetrates through the top of the third connecting plate (201) and is fixed with the bottom of the rocking wheel (10).

7. A fine filtration device for microorganism culture according to claim 3, wherein: the vibration mechanism (4) comprises a movable plate (401) which is obliquely arranged, the side wall of the movable plate (401) is fixedly connected with a plurality of rubber rods (402) which are arranged in an array, the movable plate (401) is connected with the top of a second connecting plate (305) through a second reset mechanism (5), and the movement of the movable plate (401) is pushed through a pushing mechanism (7).

8. The fine filtration device for microorganism culture according to claim 7, wherein: the second reset mechanism (5) comprises a supporting plate (501) fixedly connected to the top of a second connecting plate (305), an inclined plate (502) is fixedly connected to the top of the supporting plate (501), two symmetrically-arranged T-shaped guide rods (503) are fixedly connected to the side walls of the inclined plate (502), connecting blocks (504) are sleeved on the side walls of the T-shaped guide rods (503), the connecting blocks (504) are fixed to the side walls of the movable plate (401), and second springs (505) are sleeved on the side walls of the T-shaped guide rods (503).

9. The fine filtration device for microorganism culture according to claim 7, wherein: the pushing mechanism (7) comprises a notch (701) formed in the side wall of the exhaust pipe (603), an installation box (702) is fixedly inserted into the notch (701), a rotating rod (703) is rotatably connected to the bottom of the installation box (702) through a driving assembly (8), a cam (704) is fixedly connected to the lower end of the rotating rod (703), and a pushing plate (705) is fixedly connected to the top of the moving plate (401).

10. The fine filtration device for microorganism culture according to claim 9, wherein: the driving assembly (8) comprises a driving shaft (801) rotatably connected in the mounting box (702), a rotating fan (802) is fixedly sleeved on the side wall of the driving shaft (801), and the lower end of the driving shaft (801) penetrates through the bottom of the mounting box (702) and is fixed with the upper end of the rotating rod (703).