Livestock and poultry breeding house environment microorganism aerosol sampling device

Abstract

The invention belongs to the technical field of aerosol sampling, and particularly relates to a livestock and poultry breeding house environment microorganism aerosol sampling device. When the device is used, a door body is opened, a collecting mechanism is placed in a box body, the door body is closed, and an aerosol sampling mechanism is communicated with the collecting mechanism through a lifting assembly; air is sucked through the aerosol sampling mechanism, microbial aerosol is collected in the collecting mechanism, and after collection is completed, the collecting mechanism is taken out; in the collecting process, air firstly enters the upper cylinder body, the air does spiral motion from top to bottom along the spiral blade, the microbial aerosol sequentially flows through the middle cylinder body and the lower cylinder body under the action of gravity and then is collected by the collecting mechanism, and clean air flows out through the air outlet pipe. Therefore, the virus capture rate is improved, and the sampling efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of aerosol sampling technology, and in particular relates to a device for sampling microbial aerosols in livestock and poultry breeding environments. Background Technology

[0002] Microbial aerosols refer to particulate matter with a particle size ranging from 1 to 100 micrometers, containing components such as bacteria, archaea, fungal spores, pollen, viruses, organic matter secreted by active organisms, and fragments and debris of animals and plants. They are colloidal systems formed by microorganisms suspended in the air.

[0003] In livestock farming environments, microbial aerosols, due to their pathogenicity, can easily lead to a decline in the immunity, resistance, and productivity of farmed animals, posing a significant threat to the livestock industry. Simultaneously, they can also harm the health of livestock workers. Therefore, effective collection of microbial aerosols in this environment is essential.

[0004] However, existing devices for microbial aerosol sampling suffer from low virus capture rates, which directly leads to low sampling efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a microbial aerosol sampling device for livestock and poultry breeding environment to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A microbial aerosol sampling device for livestock and poultry breeding environment includes: a box body, an opening on one side of the box body, a door at the opening, the door being hinged to the box body, an aerosol sampling mechanism inside the box body, a lifting component being drivenly connected to the aerosol sampling mechanism, a collection mechanism below the aerosol sampling mechanism, multiple collection bottles being detachably connected to the collection mechanism, the collection mechanism being correspondingly arranged to the door, and the collection mechanism being detachably connected to the box body;

[0008] The aerosol sampling mechanism includes multiple outer shells, each including an upper cylinder, a middle cylinder, and a lower cylinder arranged coaxially. The upper, middle, and lower cylinders are all coaxially arranged, and the diameter of the lower cylinder is smaller than that of the upper cylinder. The middle cylinder is frustoconical in shape, with its small end connected to the lower cylinder and its large end connected to the upper cylinder. An exhaust pipe is coaxially fixed to the top of the upper cylinder, with its top end extending out of the upper cylinder and its bottom end extending into the upper cylinder. A helical blade is circumferentially fixed between the exhaust pipe and the inner wall of the upper cylinder.

[0009] In the livestock and poultry breeding house environmental microbial aerosol sampling device of the present invention, the lifting assembly includes a first support plate, which is horizontally arranged in the box body. Linear bearings are fixedly connected to the four corners of the first support plate. A light rod is slidably connected to the linear bearing. The light rod is vertically arranged and fixedly connected to the inner wall of the box body. A second screw is threadedly connected to the first support plate. The second screw is coaxially fixed to the output shaft of a first motor. The first motor is fixedly connected to the top of the box body. The upper cylinder is fixedly connected to the first support plate.

[0010] In the livestock and poultry breeding house environmental microbial aerosol sampling device of the present invention, the aerosol sampling mechanism further includes a first fan fixed to the top surface of the first support plate, the air inlet end of the first fan is connected to an air inlet pipe, the air inlet pipe is vertically slidably connected in a through groove, the through groove is opened on the side wall of the box body, the air inlet pipe passes through the through groove, the air outlet end of the first fan is connected to a distributor, and the multiple air outlets of the distributor are respectively connected to multiple upper cylinders through short pipes, the short pipes being located on the tangent of the upper cylinder;

[0011] The top ends of the multiple air outlet pipes are connected to the manifold, and the manifold is connected to a second fan. The second fan is fixedly connected to the first support plate. An air outlet is provided on one side wall of the housing, and the air outlet is corresponding to the second fan. A filter screen is fixedly connected to the air outlet.

[0012] In the livestock and poultry breeding house environmental microbial aerosol sampling device of the present invention, two slides are fixedly connected to the inner bottom wall of the box body. The two slides are parallel and symmetrically arranged and perpendicular to the opening. A first slide rod is slidably connected to each of the two slides. A second bearing plate is fixedly connected between the top ends of the two first slide rods. A nut is fixedly connected to the bottom surface of the second bearing plate. The nut is threadedly connected to a first screw. The first screw is coaxially fixed to the output shaft of a second motor. The second motor is fixed to the inner bottom wall of the box body. The first screw is parallel to the slide. The collection mechanism is detachably connected to the top surface of the second bearing plate.

[0013] In the livestock and poultry breeding house environment microbial aerosol sampling device of the present invention, the collection mechanism includes a third support plate, the top surface of the third support plate is provided with a plurality of clamping components, the plurality of clamping components are arranged in an array, the collection bottle is detachably connected to the clamping components, and the plurality of collection bottles located in the same row are arranged in a one-to-one correspondence with the plurality of lower cylinders.

[0014] The top surface of the second support plate is fixed with a limiting groove, and the limiting groove has an insertion port on the side facing the opening. The insertion port is adapted to the third support plate, and a clamping assembly is provided between the third support plate and the limiting groove.

[0015] In the livestock and poultry breeding house environmental microbial aerosol sampling device of the present invention, the clamping assembly includes a sliding hole opened on one side of the limiting groove, the sliding hole is close to the insertion port, a rubber column is slidably connected in the sliding hole, a circular block is hinged to the outer side wall of the limiting groove by a short shaft, the circular block is eccentrically arranged with the short shaft, a handle is fixedly fixed to the outer edge of the circular block, and the circular block is correspondingly arranged with the rubber column.

[0016] In the livestock and poultry breeding house environment microbial aerosol sampling device of the present invention, a plurality of rolling balls are rolledly connected on the top surface of the second support plate, the plurality of rolling balls are all located in the limiting groove, the plurality of rolling balls are distributed in an array, and the rolling balls are in rolling contact with the bottom surface of the third support plate.

[0017] In the livestock and poultry breeding house environmental microbial aerosol sampling device of the present invention, the clamping assembly includes two symmetrically arranged clamps. The clamps are arc-shaped and their concave surfaces are opposite each other. Both clamps are threadedly connected to a twin screw and are respectively close to the two ends of the twin screw. One end of the twin screw is coaxially fixed to the output shaft of a third motor. The third motor is fixed to the top surface of the third support plate. The clamps are slidably connected to the top surface of the third support plate.

[0018] In the livestock and poultry breeding house environment microbial aerosol sampling device of the present invention, the concave surface of the gripper is provided with an anti-slip layer.

[0019] In the livestock and poultry breeding environment microbial aerosol sampling device of the present invention, rollers are installed at the four corners of the bottom of the box.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] When using the device of the present invention, the door is opened and the collection mechanism is placed inside the box. The door is then closed, and the aerosol sampling mechanism is connected to the collection mechanism through the lifting component. Air is drawn in through the aerosol sampling mechanism to collect microbial aerosols in the collection mechanism. After collection is completed, the collection mechanism can be removed.

[0022] During the collection process, air first enters the upper cylinder and moves in a spiral motion from top to bottom along the spiral blades. Microbial aerosols flow sequentially through the middle and lower cylinders under the action of gravity and are collected by the collection mechanism. Clean air flows out through the air outlet pipe. In this invention, the microbial aerosols are separated from the air by centrifugal force, thereby improving the virus capture rate and thus improving the sampling efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an overall schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention;

[0026] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0027] Figure 4 This is a top view of the first support plate in this invention;

[0028] Figure 5 This is a top view of the second support plate in this invention;

[0029] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0030] Figure 7 for Figure 6 A magnified view of a section at point B in the middle;

[0031] Figure 8 for Figure 6 A magnified view of a section at point C;

[0032] The components are as follows: 1. Housing; 2. First motor; 3. Inlet pipe; 4. Door; 5. Through slot; 6. First fan; 7. Diverter; 8. Manifold; 9. Second fan; 10. Filter screen; 11. First support plate; 12. Outer shell; 13. Spiral blades; 14. Outlet pipe; 15. Collection bottle; 16. Second support plate; 17. Ball bearing; 18. Third support plate; 19. Second motor; 20. First screw; 21. Nut; 22. Slide rail; 23. First slide rod; 24. Third motor; 25. Gripper; 26. Linear bearing; 27. Smooth rod; 28. 29. Second screw; 30. Positioner transmitter; 31. Positioner receiver; 32. Limiting groove; 33. Circular block; 34. Rubber column; 35. Short shaft; 36. Twin screw; 1501. Bottle body; 1502. End cap; 1503. First through hole; 1504. Rubber ring; 1505. Baffle; 1506. Magnet; 1507. Fixing ring; 1508. Mounting plate; 1509. Second through hole; 1510. Annular groove; 1511. Limiting groove; 1512. Insert plate; 1513. Rubber ring; 1514. Top column; 1515. Internal threaded ring. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] Reference Figures 1 to 5 This embodiment discloses a microbial aerosol sampling device for livestock and poultry breeding house environment, including: a box body 1, an opening on one side of the box body 1, a door 4 at the opening, the door 4 being hinged to the box body 1, an aerosol sampling mechanism inside the box body 1, a lifting component being driven to the aerosol sampling mechanism, a collection mechanism being provided below the aerosol sampling mechanism, a plurality of collection bottles 15 being detachably connected to the collection mechanism, the collection mechanism being correspondingly provided to the door 4, and the collection mechanism being detachably connected to the box body 1;

[0037] The aerosol sampling mechanism includes multiple outer shells 12. Each outer shell 12 includes an upper cylinder, a middle cylinder, and a lower cylinder arranged coaxially. The upper cylinder, middle cylinder, and lower cylinder are all coaxially arranged, and the diameter of the lower cylinder is smaller than that of the upper cylinder. The middle cylinder is shaped like a frustum. The small end of the middle cylinder is connected to the lower cylinder, and the large end of the middle cylinder is connected to the upper cylinder. An exhaust pipe 14 is coaxially fixed to the top of the upper cylinder. The top end of the exhaust pipe 14 extends out of the upper cylinder, and the bottom end of the exhaust pipe 14 extends into the upper cylinder. A spiral blade 13 is circumferentially fixed between the exhaust pipe 14 and the inner wall of the upper cylinder.

[0038] When using the device of the present invention, open the door 4 and place the collection mechanism inside the box 1, close the door 4, connect the aerosol sampling mechanism and the collection mechanism through the lifting component, draw air through the aerosol sampling mechanism to collect microbial aerosols in the collection mechanism, and take out the collection mechanism after collection is completed.

[0039] During the collection process, air first enters the upper cylinder and moves in a spiral motion from top to bottom along the spiral blades 13. Microbial aerosols flow sequentially through the middle and lower cylinders under the action of gravity and are collected by the collection mechanism. Clean air flows out through the air outlet pipe 14. In this invention, the microbial aerosols are separated from the air by centrifugal force, thereby improving the virus capture rate and thus improving the sampling efficiency.

[0040] In one alternative embodiment, the lifting assembly includes a first support plate 11, which is horizontally disposed inside the housing 1. Linear bearings 26 are fixedly connected to the four corners of the first support plate 11. A guide rod 27 is slidably connected to the linear bearings 26. The guide rod 27 is vertically disposed and fixedly connected to the inner wall of the housing 1. A second screw 28 is threadedly connected to the first support plate 11. The second screw 28 is coaxially fixedly connected to the output shaft of the first motor 2. The first motor 2 is fixedly connected to the top of the housing 1. The upper cylinder is fixedly connected to the first support plate 11.

[0041] The first motor 2 drives the second screw 28 to rotate, thereby causing the first bearing plate 11 to rise or fall; the upper cylinder is fixed to the first bearing plate 11, and the middle cylinder and the lower cylinder are both located below the first bearing plate 11; the linear bearing 26 cooperates with the guide rod 27 to make the lifting and lowering of the first bearing plate 11 smoother and prevent jamming.

[0042] In one alternative embodiment, the first bearing plate 11 is rotatably connected to the two opposite sides of the second screw 28. The top end of the second screw 28 extends out of the top end of the housing 1 and is fixedly connected to the first bevel gear. The first motor 2 is a hollow shaft motor. A transmission shaft is fixedly connected to the output shaft of the first motor 2. The two ends of the transmission shaft are fixedly connected to the second bevel gear. The second bevel gear meshes with the first bevel gear. The second screw 28 is rotatably connected to the inner wall of the housing 1.

[0043] A buffer spring is sleeved on the outer side of the bare rod 27. The buffer spring is located on the bottom surface of the first bearing plate 11 and abuts against the first bearing plate 11.

[0044] In one alternative embodiment, the aerosol sampling mechanism further includes a first fan 6 fixed to the top surface of the first support plate 11. The air inlet end of the first fan 6 is connected to an air inlet pipe 3. The air inlet pipe 3 is vertically slidably connected in a through groove 5. The through groove 5 is opened on the side wall of the housing 1. The air inlet pipe 3 passes through the through groove 5. The air outlet end of the first fan 6 is connected to a distributor 7. Multiple air outlets of the distributor 7 are respectively connected to multiple upper cylinders through short pipes. The short pipes are located on the tangent of the upper cylinders.

[0045] The top ends of multiple air outlet pipes 14 are connected to the manifold 8, and the manifold 8 is connected to a second fan 9. The second fan 9 is fixed to the first support plate 11. An air outlet is provided on one side wall of the housing 1, and the air outlet is set in correspondence with the second fan 9. A filter screen 10 is fixed to the air outlet.

[0046] The first fan 6 draws in outside air through the air inlet pipe 3. The outside air enters multiple upper cylinders through the distributor 7. The short pipe is located on the tangent of the upper cylinder, causing the air to spiral within the outer shell 12, generating centrifugal force to separate the microbial aerosol from the air. The separated clean air is drawn out and sent out of the box 1 by the action of the second fan 9. The filter screen 10 prevents external debris from entering the box 1.

[0047] In one alternative embodiment, two slide rails 22 are fixedly connected to the inner bottom wall of the housing 1. The two slide rails 22 are parallel and symmetrically arranged and perpendicular to the opening. A first slide rod 23 is slidably connected to each of the two slide rails 22. A second bearing plate 16 is fixedly connected between the top ends of the two first slide rods 23. A nut 21 is fixedly connected to the bottom surface of the second bearing plate 16. A first screw 20 is threadedly connected to the nut 21. The first screw 20 is coaxially fixed to the output shaft of the second motor 19. The second motor 19 is fixedly connected to the inner bottom wall of the housing 1. The first screw 20 is parallel to the slide rails 22. The collecting mechanism is detachably connected to the top surface of the second bearing plate 16.

[0048] In one alternative embodiment, the collection mechanism includes a third support plate 18, the top surface of which is provided with multiple clamping components, the multiple clamping components are arranged in an array, and collection bottles 15 are detachably connected to the clamping components. Multiple collection bottles 15 located in the same row are arranged in a one-to-one correspondence with multiple lower cylinders.

[0049] The top surface of the second support plate 16 is fixed with a limiting groove 31. The limiting groove 31 has an insertion port on the side facing the opening. The insertion port is adapted to the third support plate 18. A clamping component is provided between the third support plate 18 and the limiting groove 31.

[0050] In one alternative embodiment, the clamping assembly includes a sliding hole formed on one side of the limiting groove 31, the sliding hole being close to the insertion port, a rubber post 33 being slidably connected inside the sliding hole, a circular block 32 being hinged to the outer wall of the limiting groove 31 via a short shaft 34, the circular block 32 being eccentrically positioned with respect to the short shaft 34, a handle being fixedly attached to the outer edge of the circular block 32, and the circular block 32 being correspondingly positioned with respect to the rubber post 33.

[0051] In one alternative embodiment, a plurality of balls 17 are rolledly connected to the top surface of the second support plate 16. The balls 17 are all located in the limiting groove 31 and are distributed in an array. The balls 17 roll in contact with the bottom surface of the third support plate 18.

[0052] Open the door 4 and insert the third support plate 18 into the limiting groove 31. The setting of the ball bearing 17 makes the insertion of the third support plate 18 smoother. When the third support plate 18 enters the limit position of the limiting groove 31, rotate the circular block 32 by the handle. The circular block 32 squeezes the rubber column 33, and the rubber column 33 squeezes the third support plate 18, thereby completing the fixation of the third support plate 18. The second motor 19 drives the first screw 20, and the first screw 20 drives the second support plate 16 to move along the slide 22 through the nut 21.

[0053] When one row of collection bottles 15 is full, the outer shell 12 rises and separates from the collection bottles 15. The other row of collection bottles 15 moves to below the outer shell 12 under the action of the second motor 19. The outer shell 12 descends and connects with the collection bottles 15 to continue collecting.

[0054] To facilitate alignment between the collection bottle 15 and the outer casing 12, a locator transmitter 29 is fixedly connected to the ground of the first support plate 11. The locator transmitter 29 is located at one end of multiple outer casings 12. Multiple locator receivers 30 are fixedly connected to the top surface of the second support plate 16. The locator receivers 30 are adapted to the locator transmitter 29. The multiple locator receivers 30 are located at one end of multiple rows of collection bottles 15. When the signal emitted by the locator transmitter 29 is received by the locator receiver 30, the outer casing 12 descends and connects with the collection bottle 15.

[0055] In one alternative embodiment, the clamping assembly includes two symmetrically arranged grippers 25. The grippers 25 are arc-shaped with their concave surfaces facing each other. Both grippers 25 are threadedly connected to a twin screw 35 and are respectively close to both ends of the twin screw 35. One end of the twin screw 35 is coaxially fixed to the output shaft of a third motor 24. The third motor 24 is fixed to the top surface of the third support plate 18. The grippers 25 are slidably connected to the top surface of the third support plate 18.

[0056] The third motor 24 drives the twin screw 35 to rotate, and the twin screw 35 drives the two grippers 25 to move closer to each other, thereby clamping and fixing the collection bottle 15.

[0057] In one alternative, the concave surface of the gripper 25 is provided with an anti-slip layer.

[0058] The anti-slip layer is preferably a rubber layer, and the side of the rubber layer that contacts the collection bottle 15 has anti-slip texture, which makes the collection bottle 15 more secure and avoids damage to the collection bottle 15 due to hard contact between the clamp 25 and the collection bottle 15.

[0059] In one alternative design, casters are installed at the four corners of the bottom of the housing 1.

[0060] This design facilitates the movement of box 1.

[0061] Example 2

[0062] Reference Figure 6-8In this embodiment, the collection bottle 15 includes a bottle body 1501. A fixing ring 1507 is circumferentially fixed to the top opening of the bottle body 1501. Multiple limiting grooves 1511 are circumferentially spaced at equal intervals on the inner sidewall of the fixing ring 1507, with the top ends of the limiting grooves 1511 penetrating the top surface of the fixing ring 1507. A first groove is circumferentially formed on the inner sidewall of the fixing ring 1507, located below the limiting grooves 1511. A mounting plate 1508 is slidably connected to the side wall. The mounting plate 1508 is coaxially arranged with the fixing ring 1507. Multiple insert plates 1512 are circumferentially fixed at equal intervals on the outer edge of the mounting plate 1508. The multiple insert plates 1512 are correspondingly and detachably connected to multiple limiting grooves 1511. An annular groove 1510 is circumferentially formed on the top surface of the mounting plate 1508. The annular groove 1510 is coaxially arranged with the mounting plate 1508 and has an internal thread. An internal threaded ring 1515 is connected, and a ramp is provided at the bottom end of the internal threaded ring 1515. The ramp is located on the outer side wall of the internal threaded ring 1515. A second groove is provided circumferentially on the outer side wall of the mounting plate 1508. The second groove is corresponding to the first groove. A rubber ring 1513 is provided circumferentially in the second groove. Multiple third through holes are provided at equal intervals circumferentially at the bottom of the second groove. A top post 1514 is slidably connected in the third through hole. One end of the top post 1514 is always in contact with the ramp, and the other end of the top post 1514 is in contact with the rubber ring 1513. The top end of the internal threaded ring 1515 passes through the annular groove 1510 and is coaxially fixed to the end cap 1502. When the end cap 1502 is rotated, the end cap 1502 drives the internal threaded ring 1515 to move down. At this time, the ramp causes the top post 1514 to move to the outside of the mounting plate 1508, pressing the rubber ring 1513 against the first groove to enhance the sealing performance.

[0063] The end cap 1502 has a first through hole 1503 coaxially formed, and the mounting plate 1508 has a second through hole 1509 coaxially formed. The inner diameter of the second through hole 1509 is larger than the inner diameter of the first through hole 1503. The bottom surface of the end cap 1502 is hinged to a baffle 1505 by a thin shaft. A torsion spring is sleeved on the thin shaft. One end of the torsion spring abuts against the end cap 1502, and the other end abuts against the baffle 1505. The baffle 1505 is made of medical stainless steel. A magnet 1506 is fixedly connected to the bottom surface of the end cap 1502. The magnet 1506 is magnetically connected to the baffle 1505. A rubber ring 1504 is circumferentially fixed to the inner side wall of the first through hole 1503. The rubber ring 1504 fits tightly against the baffle 1505.

[0064] The first through hole 1503 is set vertically and vertically corresponding to the outer casing 12.

[0065] The outer casing 12 is inserted into the first through hole 1503. The outer edge of the outer casing 12 first contacts the rubber ring 1504, and then the baffle 1505 is pushed open to realize the collection function.

[0066] Once collection is complete, the outer shell 12 separates from the first through hole 1503, the baffle 1505 closes first, and then the outer edge of the outer shell 12 separates from the rubber ring 1504.

[0067] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0068] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A sampling device for microbial aerosols in livestock and poultry breeding sheds, characterized in that, include: A box (1) has an opening on one side, and a door (4) is provided at the opening. The door (4) is hinged to the box (1). An aerosol sampling mechanism is provided inside the box (1). The aerosol sampling mechanism is driven and connected to a lifting component. A collection mechanism is provided below the aerosol sampling mechanism. Multiple collection bottles (15) are detachably connected to the collection mechanism. The collection mechanism is correspondingly provided to the door (4). The collection mechanism is detachably connected to the box (1). The aerosol sampling mechanism includes multiple outer shells (12). Each outer shell (12) includes an upper cylinder, a middle cylinder, and a lower cylinder arranged coaxially. The upper cylinder, the middle cylinder, and the lower cylinder are all coaxially arranged, and the diameter of the lower cylinder is smaller than the diameter of the upper cylinder. The middle cylinder is shaped like a frustum. The small end of the middle cylinder is connected to the lower cylinder, and the large end of the middle cylinder is connected to the upper cylinder. An exhaust pipe (14) is coaxially fixed to the top of the upper cylinder. The top end of the exhaust pipe (14) extends out of the upper cylinder, and the bottom end of the exhaust pipe (14) extends into the upper cylinder. A spiral blade (13) is circumferentially fixed between the exhaust pipe (14) and the inner wall of the upper cylinder.

2. The livestock and poultry breeding house environmental microbial aerosol sampling device according to claim 1, characterized in that: The lifting assembly includes a first support plate (11), which is horizontally arranged inside the housing (1). Linear bearings (26) are fixed at the four corners of the first support plate (1). The linear bearings (26) are slidably connected to a guide rod (27). The guide rod (27) is vertically arranged and fixed to the inner wall of the housing (1). The first support plate (11) is threadedly connected to a second screw (28). The second screw (28) is coaxially fixed to the output shaft of a first motor (2). The first motor (2) is fixed to the top of the housing (1). The upper cylinder is fixed to the first support plate (11).

3. The livestock and poultry breeding house environmental microbial aerosol sampling device according to claim 2, characterized in that: The aerosol sampling mechanism further includes a first fan (6) fixed to the top surface of the first support plate (11). The air inlet end of the first fan (6) is connected to an air inlet pipe (3). The air inlet pipe (3) is vertically slidably connected in a through groove (5). The through groove (5) is opened on the side wall of the box body (1). The air inlet pipe (3) passes through the through groove (5). The air outlet end of the first fan (6) is connected to a distributor (7). Multiple air outlets of the distributor (7) are respectively connected to multiple upper cylinders through short pipes. The short pipes are located on the tangent of the upper cylinder. The top ends of the multiple air outlet pipes (14) are connected to the manifold (8), the manifold (8) is connected to a second fan (9), the second fan (9) is fixed to the first support plate (11), an air outlet is provided on one side wall of the box (1), the air outlet is corresponding to the second fan (9), and a filter screen (10) is fixed to the air outlet.

4. The livestock and poultry breeding house environmental microbial aerosol sampling device according to claim 1, characterized in that: Two slide rails (22) are fixedly connected to the inner bottom wall of the box (1). The two slide rails (22) are parallel and symmetrically arranged. The two slide rails (22) are perpendicular to the opening. A first slide rod (23) is slidably connected to each of the two slide rails (22). A second bearing plate (16) is fixedly connected between the top ends of the two first slide rods (23). A nut (21) is fixedly connected to the bottom surface of the second bearing plate (16). The nut (21) is threadedly connected to a first screw (20). The first screw (20) is coaxially fixed to the output shaft of a second motor (19). The second motor (19) is fixed to the inner bottom wall of the box (1). The first screw (20) is parallel to the slide rail (22). The collecting mechanism is detachably connected to the top surface of the second bearing plate (16).

5. The livestock and poultry breeding house environmental microbial aerosol sampling device according to claim 4, characterized in that: The collection mechanism includes a third support plate (18), and the top surface of the third support plate (18) is provided with a plurality of clamping components. The plurality of clamping components are arranged in an array. The collection bottle (15) is detachably connected to the clamping component. The plurality of collection bottles (15) located in the same row are arranged in a one-to-one correspondence with the plurality of lower cylinders. The top surface of the second support plate (16) is fixed with a limiting groove (31), and the limiting groove (31) has an insertion port on the side facing the opening. The insertion port is adapted to the third support plate (18), and a clamping assembly is provided between the third support plate (18) and the limiting groove (31).

6. The livestock and poultry breeding house environmental microbial aerosol sampling device according to claim 5, characterized in that: The clamping assembly includes a sliding hole formed on one side of the limiting groove (31), the sliding hole being close to the insertion port, a rubber column (33) being slidably connected inside the sliding hole, a circular block (32) being hinged to the outer wall of the limiting groove (31) via a short shaft (34), the circular block (32) being eccentrically arranged with respect to the short shaft (34), a handle being fixedly attached to the outer edge of the circular block (32), and the circular block (32) being correspondingly arranged with respect to the rubber column (33).

7. A microbial aerosol sampling device for livestock and poultry breeding house environment according to claim 5, characterized in that: Multiple balls (17) are rolledly connected to the top surface of the second support plate (16). The multiple balls (17) are all located in the limiting groove (31). The multiple balls (17) are arranged in an array. The balls (17) are in rolling contact with the bottom surface of the third support plate (18).

8. The livestock and poultry breeding house environmental microbial aerosol sampling device according to claim 5, characterized in that: The clamping assembly includes two symmetrically arranged jaws (25). The jaws (25) are arc-shaped and have concave surfaces facing each other. Both jaws (25) are threaded onto a twin screw (35) and are respectively close to both ends of the twin screw (35). One end of the twin screw (35) is coaxially fixed to the output shaft of a third motor (24). The third motor (24) is fixed to the top surface of the third bearing plate (18). The jaws (25) are slidably connected to the top surface of the third bearing plate (18).

9. A microbial aerosol sampling device for livestock and poultry breeding house environment according to claim 8, characterized in that: The concave surface of the gripper (25) is provided with an anti-slip layer.

10. A microbial aerosol sampling device for livestock and poultry breeding house environment according to claim 1, characterized in that: Rollers are installed at the four corners of the bottom of the box (1).

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