An air purification device for pigsties

Abstract

This invention discloses an air purification device for pig farms, relating to the field of air purification technology. It includes a housing and a fan fixedly installed on the top of the housing. The fan is connected to an air inlet pipe, and an air outlet pipe is fixedly connected to the bottom of the housing. The device is characterized by: a filter screen installed at the top of the interior of the housing, and a dust removal unit installed on top of the filter screen; the dust removal unit includes a first fixing ring, a dust collection groove, a slider, a support arm, a fixing block, a first rotating shaft, a collection pipe, a drive block, a rotating shaft, and a brush. The first fixing ring is fixedly connected to the inner wall of the housing, and a dust collection groove is formed on the first fixing ring. During rotation, the fixing block continuously pushes the slider to slide inside the dust collection groove, thereby cleaning the dust accumulated inside the dust collection groove, preventing dust accumulation, and concentrating dust residue inside the dust collection groove, increasing the storage capacity of the dust collection groove.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, and in particular to an air purification device for pigsties used in pig farming. Background Technology

[0002] A pigsty is a building used for raising pigs. Depending on the purpose of raising pigs, it can be divided into breeding pigsties, gestation pigsties, farrowing pigsties, growing pigsties, and finishing pigsties. Feeding and watering generally take place inside the pigsty, while an exercise area or manure passageway is provided outside. The pigsty is separated by walls or pens. The more specialized the pigsty, the more conducive it is to achieving pig farming specialization, and the higher the utilization rate of the pig pens.

[0003] Existing pigsties often have poor environments and strong odors, which can easily lead to bacterial growth, making pigs susceptible to illness and even outbreaks of disease, thus hindering their growth. Therefore, it is necessary to purify the air in pigsties.

[0004] A patent document with publication number CN214345161U discloses an air purification device for pig farms. This device includes an intake fan, an intake pipe, and an exhaust fan. In actual use, the casing is placed in a suitable position inside the pig farm. Pressing the intake button drives the intake fan to draw air out of the pig farm. The air from outside the pig farm is filtered through a first filter layer, which removes larger particles, before entering the casing. A second filter layer then removes smaller particles, allowing clean air to enter the middle of the casing. Finally, the exhaust fan is turned on, allowing the purified air to exit the casing through ventilation holes and enter the pig farm. This achieves air purification inside the pig farm. However, in existing pig farm air purification devices, dust accumulates on the filter layers during the purification process, easily causing clogging and reducing the filtration efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that in the existing air purification devices for pig farms, dust accumulates on the filter layer during the air purification process, which can easily cause the filter layer to become clogged, thereby reducing the filtration effect of the filter layer.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an air purification device for pigsties, comprising a shell and a fan fixedly installed on the top of the shell, the fan being connected to an air inlet pipe, and an air outlet pipe being fixedly connected to the bottom of the shell, characterized in that: a filter screen is provided at the top of the interior of the shell, and a dust removal unit is installed on the top of the filter screen; the dust removal unit includes a first fixing ring, a dust collection groove, a slider, a support arm, a fixing block, a first rotating shaft, a collection pipe, a drive block, a rotating shaft, and a brush; the first fixing ring is fixedly connected to the inner wall of the shell, and a dust collection groove is provided on the first fixing ring; the slider is slidably connected to the inner wall of the dust collection groove; one end of the support arm is fixedly connected to the first rotating shaft, and the other end of the support arm is fixedly connected to the fixing block; the slider and the fixing block are magnetic and attract each other; a first sliding groove is provided on the side of the support arm near the filter screen, the first sliding groove is slidably connected to the drive block, the drive block is rotatably connected to the rotating shaft, and the rotating shaft is fixedly connected to the brush.

[0007] As a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, it further includes a transmission unit, which includes a mounting frame and a motor. The mounting frame is fixedly installed on the inner wall of the housing, and the motor is fixedly installed on the top of the mounting frame. The output end of the motor is fixedly connected to a first rotating shaft.

[0008] In a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, the motor output shaft passes through a through hole in the center of the filter screen and is rotatably connected to the first rotating shaft.

[0009] In a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, a top cover is fixedly installed on the top of the shell.

[0010] In a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, a hydraulic cylinder is fixedly installed at the bottom of the shell.

[0011] As a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, wherein: one end of the collection pipe is connected to the dust collection trough, the collection pipe passes through the dust collection pipe, the inner wall of the collection pipe is fixedly connected to the dust filter, the dust collection pipe is fixedly connected to the collection tank, and the collection tank is fixedly connected to the shell.

[0012] As a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, wherein: a second fixing ring is fixedly connected to the inner wall of the shell near the bottom, a second sliding groove is provided on the upper surface of the second fixing ring, a support column is fixedly connected to the bottom wall of the second sliding groove, a filter layer one is connected to the top of the support column, and a filter layer two is fixedly connected to the top of the filter layer one.

[0013] In a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, the first rotating shaft is rotatably connected to one end of a lead screw, the lead screw is threadedly connected to a drive block, and the other end of the lead screw is rotatably connected to a support arm.

[0014] As a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, wherein: the mounting frame is fixedly connected to one end of the fixing pipe, the inner wall of the fixing pipe is rotatably connected to the first rotating shaft, the other end of the fixing pipe is fixedly connected to the first bevel gear, the first bevel gear meshes with the second bevel gear, and the second bevel gear is fixedly connected to the lead screw.

[0015] In a preferred embodiment of the air purification device for pigsty used in pig farming according to the present invention, the screw is threaded to the inner wall of the internal threaded pipe, the outer wall of the internal threaded pipe is fixedly connected to the third bevel gear, the third bevel gear is fixedly connected to one end of the movable ring, the other end of the movable ring is rotatably connected to the drive block, the third bevel gear is meshed with the fourth bevel gear, the fourth bevel gear is fixedly connected to one end of the second rotating shaft, the other end of the second rotating shaft is rotatably connected to the fixed block, the fixed block is connected to the drive block, and the second rotating shaft is connected to the first rotating shaft through a belt ring.

[0016] The beneficial effects of the present invention are as follows: When the first rotating shaft rotates, it drives the support arm to rotate. When the support arm rotates, it drives the fixed block to rotate synchronously. Because the slider and the fixed block have magnetic properties, the fixed block attracts the slider to the side that is close to it. During the rotation process, the fixed block will continuously push the slider to slide continuously inside the dust collection tank, thereby cleaning the dust accumulated inside the dust collection tank, avoiding the accumulation of dust inside the dust collection tank, and concentrating the dust residue inside the dust collection tank, thus increasing the storage capacity inside the dust collection tank.

[0017] The drive shaft rotates, which in turn drives the brush to rotate. The brush continuously sweeps away the dust adhering to the surface of the filter screen, preventing dust from adhering to the filter screen surface and reducing the filter screen's filtration effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the shell in an embodiment of this disclosure.

[0019] Figure 2 This is a schematic cross-sectional view of the housing in an embodiment of this disclosure.

[0020] Figure 3 This is a schematic diagram of the first fixing ring structure in an embodiment of this disclosure.

[0021] Figure 4 In the embodiments of this disclosure Figure 3 Enlarged diagram of point A in the middle.

[0022] Figure 5 This is a schematic diagram of the transmission unit structure in an embodiment of this disclosure.

[0023] Figure 6 This is a schematic diagram of the filter layer two structure in an embodiment of this disclosure.

[0024] Figure 7 This is a schematic diagram of the filter layer structure in an embodiment of this disclosure.

[0025] Figure 8 This is a bottom view of the support arm in an embodiment of this disclosure.

[0026] Figure 9 This is a cross-sectional schematic diagram of the collection tube in an embodiment of this disclosure.

[0027] Figure 10 In the embodiments of this disclosure Figure 9 Enlarged diagram of point B in the image.

[0028] Figure 11 This is a cross-sectional view of the support arm in an embodiment of this disclosure.

[0029] Figure 12 In the embodiments of this disclosure Figure 11 Enlarged diagram of point C in the image.

[0030] Reference numerals: 1. Housing; 2. Fan; 3. Inlet pipe; 4. Filter screen; 5. Outlet pipe; 100. Dust removal unit; 401. First fixing ring; 402. Dust collection trough; 403. Slider; 404. Support arm; 404. First sliding groove; 4041. Fixing block; 405. First rotating shaft; 406. Collection pipe; 407. Drive block; 408. Rotating shaft; 409. Brush; 410. Transmission unit; 200. Mounting bracket; 201. Motor; 202. Collection tank; 411. Top cover; 412. Hydraulic cylinder; 413. Dust filter. 4071 mesh, 414 dust collection pipe, 415 second fixed ring, 416 second slide groove, 417 support column, 418 filter layer one, 419 filter layer two, 420 lead screw, 421 fixed pipe, 422 first bevel gear, 423 second bevel gear, 424 internal threaded pipe, 425 third bevel gear, 426 movable ring, 427 fourth bevel gear, 428 second rotating shaft, 429 fixed block, 430 belt ring, 200 transmission unit, 201 mounting bracket, 202 motor. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Example 1 Reference Figures 1-4This embodiment provides an air purification device for pig farms, 1 including a housing 1 and a fan 2 fixedly installed on the top of the housing 1. The fan 2 is connected to an air inlet pipe 3, and an air outlet pipe 5 is fixedly connected to the bottom of the housing 1. A filter screen 4 is provided inside the top of the housing 1, and a dust removal unit 100 is installed on the top of the filter screen 4.

[0033] In this preferred embodiment, after the fan 2 is started, it draws in air from the air inlet pipe 3 and blows the air into the housing 1. The filter screen 4 filters the dust in the air, and then the cleaned air enters the pigsty from the air outlet pipe 5.

[0034] The dust removal unit 100 includes a first fixing ring 401, a dust collection groove 402, a slider 403, a support arm 404, a fixing block 405, a first rotating shaft 406, a collection pipe 407, a drive block 408, a rotating shaft 409, and a brush 410. The first fixing ring 401 is fixedly connected to the inner wall of the housing 1. The dust collection groove 402 is provided on the first fixing ring 401. The slider 403 is slidably connected to the inner wall of the dust collection groove 402. One end of the support arm 404 is fixedly connected to the first rotating shaft 406, and the other end of the support arm 404 is fixedly connected to the fixing block 405. The slider 403 and the fixing block 405 are magnetic and attract each other.

[0035] In this preferred embodiment, when the first rotating shaft 406 rotates, it drives the support arm 404 to rotate. When the support arm 404 rotates, it drives the fixing block 405 to rotate synchronously. Because the slider 403 and the fixing block 405 have magnetic properties, the fixing block 405 attracts the slider 403 to the side that is close to it. Therefore, during the rotation, the fixing block 405 will continuously push the slider 403 to slide continuously inside the dust collection tank 402, thereby cleaning the dust accumulated inside the dust collection tank 402, avoiding the accumulation of dust inside the dust collection tank 402, and concentrating the dust residue inside the dust collection tank 402, thereby increasing the storage capacity inside the dust collection tank 402.

[0036] The support arm 404 has a first sliding groove 4041 on the side near the filter screen 4. The first sliding groove 4041 is slidably connected to the drive block 408. The drive block 408 is rotatably connected to the rotating shaft 409. The rotating shaft 409 is fixedly connected to the brush 410.

[0037] In this preferred embodiment, the drive shaft 409 rotates, which in turn drives the brush 410 to rotate. The brush 410 continuously cleans the dust adhering to the surface of the filter screen 4, preventing dust from adhering to the surface of the filter screen 4 and reducing the filtration effect of the filter screen 4.

[0038] Example 2 Reference Figures 1-12 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that...

[0039] It also includes a transmission unit 200, which includes a mounting bracket 201 and a motor 202. The mounting bracket 201 is fixedly installed on the inner wall of the housing 1, and the motor 202 is fixedly installed on the top of the mounting bracket 201. The output end of the motor 202 is fixedly connected to the first rotating shaft 406.

[0040] The output shaft of the motor 202 passes through the through hole in the center of the filter screen 4 and is rotatably connected to the first rotating shaft 406.

[0041] In this preferred embodiment, the mounting bracket 201 is used to fix the motor 202. When the motor 202 is working, it can drive the first rotating shaft 406 to rotate. When the first rotating shaft 406 rotates, it drives the support arm 404 to rotate. When the support arm 404 rotates, it will drive the fixing block 405 to rotate synchronously. Because the slider 403 and the fixing block 405 have magnetic properties, the fixing block 405 attracts the slider 403 to the side that is close to it. Therefore, during the rotation, the fixing block 405 will continuously push the slider 403 to slide continuously inside the dust collection tank 402, thereby cleaning the dust accumulated inside the dust collection tank 402, avoiding the accumulation of dust inside the dust collection tank 402, and concentrating the dust residue inside the dust collection tank 402, thereby increasing the storage capacity inside the dust collection tank 402.

[0042] A top cover 412 is fixedly installed on the top of the housing 1.

[0043] In this embodiment, the top cover 412 is preferably used to seal the top of the housing 1.

[0044] A hydraulic cylinder 413 is fixedly installed at the bottom of the housing 1.

[0045] In this preferred embodiment, the hydraulic cylinder 413 is driven to perform lifting and lowering movements, which can drive the housing 1 to perform lifting and lowering movements, thereby adjusting the height of the entire device. The height of the air inlet pipe 3 can be changed according to the shape of the pigpen, thereby improving practicality.

[0046] One end of the collection pipe 407 is connected to the dust collection tank 402. The collection pipe 407 passes through the dust collection pipe 414. The inner wall of the collection pipe 407 is fixedly connected to the dust filter screen 4071. The dust collection pipe 414 is fixedly connected to the collection tank 411. The collection tank 411 is fixedly connected to the shell 1.

[0047] In this preferred embodiment, the dust inside the dust collection tank 402 is pushed into the collection tube 407 by the slider 403, the dust in the collection tube 407 is blocked by the dust filter 4071, and the dust falls into the collection tank 411 for collection.

[0048] A second fixing ring 415 is fixedly connected to the inner wall of the housing 1 near the bottom. A second sliding groove 416 is provided on the upper surface of the second fixing ring 415. A support column 417 is fixedly connected to the bottom wall of the second sliding groove 416. A filter layer 418 is connected to the top of the support column 417. A filter layer 419 is fixedly connected to the top of the filter layer 418.

[0049] In this preferred embodiment, the first filter layer 418 is used to filter out larger particles in the air, and the second filter layer 419 is used to filter out smaller particles in the air.

[0050] The first rotating shaft 406 is rotatably connected to one end of the lead screw 420, the lead screw 420 is threadedly connected to the drive block 408, and the other end of the lead screw 420 is rotatably connected to the support arm 404.

[0051] In this preferred embodiment, when the lead screw 420 rotates, it can drive the drive block 408 to move along the length direction of the lead screw 420. When the drive block 408 moves, it drives the rotating shaft 409 and the brush 410 to move along the length direction of the lead screw 420. At the same time, the support arm 404 rotates, driving the rotating shaft 409 to rotate. The rotating shaft 409 drives the brush 410 to rotate. The brush 410 continuously cleans the dust attached to the surface of the filter screen 4, ensuring that the dust on the entire surface of the filter screen 4 is cleaned, preventing dust from adhering to the surface of the filter screen 4 and reducing the filtration effect of the filter screen 4.

[0052] The mounting bracket 201 is fixedly connected to one end of the fixing tube 421. The inner wall of the fixing tube 421 is rotatably connected to the first rotating shaft 406. The other end of the fixing tube 421 is fixedly connected to the first bevel gear 422. The first bevel gear 422 meshes with the second bevel gear 423. The second bevel gear 423 is fixedly connected to the lead screw 420.

[0053] In this preferred embodiment, the fixing tube 421 is used to support and fix the first bevel gear 422. When the first rotating shaft 406 rotates, it can drive the support arm 404 to rotate around the first rotating shaft 406. At this time, the support arm 404 drives the lead screw 420 and the second bevel gear 423 to rotate around the first rotating shaft 406. Since the first bevel gear 422 and the second bevel gear 423 are meshed, and the position of the first bevel gear 422 is fixed, the second bevel gear 423 will rotate. When the second bevel gear 423 rotates, it drives the lead screw 420 to rotate around the first rotating shaft 406. When the lead screw 420 rotates, it drives the drive block 408 to move along the length of the lead screw 420. When the drive block 408 moves, it drives the rotating shaft 409 and the brush 410 to move along the length of the lead screw 420. At the same time, the support arm 404 rotates, driving the rotating shaft 409 to rotate. The rotating shaft 409 drives the brush 410 to rotate. The brush 410 continuously cleans the dust attached to the surface of the filter screen 4, ensuring that the dust on the entire surface of the filter screen 4 is cleaned, preventing dust from adhering to the surface of the filter screen 4 and reducing the filtration effect of the filter screen 4.

[0054] The lead screw 420 is threaded to the inner wall of the internal threaded tube 424, and the outer wall of the internal threaded tube 424 is fixedly connected to the third bevel gear 425. The third bevel gear 425 is fixedly connected to one end of the movable ring 426, and the other end of the movable ring 426 is rotatably connected to the drive block 408. The third bevel gear 425 meshes with the fourth bevel gear 427, and the fourth bevel gear 427 is fixedly connected to one end of the second rotating shaft 428. The other end of the second rotating shaft 428 is rotatably connected to the fixed block 429, and the fixed block 429 is connected to the drive block 408. The second rotating shaft 428 is connected to the first rotating shaft 406 through the belt ring 430.

[0055] In this preferred embodiment, when the drive block 408 moves along the length of the lead screw 420, the internal threaded tube 424 rotates under the action of the thread. The internal threaded tube 424 drives the third bevel gear 425 to rotate, the third bevel gear 425 drives the fourth bevel gear 427 to rotate, the fourth bevel gear 427 drives the second rotating shaft 428 to rotate, the second rotating shaft 428 is connected to the first rotating shaft 406 to rotate through the belt ring 430, and the rotating shaft 409 drives the brush 410 to rotate. The brush 410 continuously cleans the dust attached to the surface of the filter screen 4, ensuring that the dust on the entire surface of the filter screen 4 is cleaned, preventing dust from adhering to the surface of the filter screen 4 and reducing the filtration effect of the filter screen 4.

[0056] Example 3 Reference Figures 1-12 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that...

[0057] Working principle: When purifying the air in the pigsty, the hydraulic cylinder 413 is driven to move up and down, which can drive the housing 1 to move up and down, thereby adjusting the height of the entire device. The height of the air inlet pipe 3 can be changed according to the shape of the pigpen, thereby improving its practicality.

[0058] The drive motor 202 rotates in the forward direction, and the first rotating shaft 406 of the motor 202 rotates in the forward direction. When the first rotating shaft 406 rotates, it drives the support arm 404 to rotate in the forward direction. When the support arm 404 rotates, it drives the fixed block 405 to rotate synchronously. Because the slider 403 and the fixed block 405 have magnetic properties, the fixed block 405 attracts the slider 403 to the side that is close to it. Therefore, during the rotation, the fixed block 405 will continuously push the slider 403 to slide continuously inside the dust collection tank 402, thereby cleaning the dust accumulated inside the dust collection tank 402, avoiding the accumulation of dust inside the dust collection tank 402, and concentrating the dust residue inside the dust collection tank 402, thereby increasing the storage capacity inside the dust collection tank 402.

[0059] Simultaneously, the support arm 404 drives the lead screw 420 and the second bevel gear 423 to rotate around the first rotating shaft 406. Since the first bevel gear 422 and the second bevel gear 423 are meshed, and the position of the first bevel gear 422 is fixed, the second bevel gear 423 will rotate. When the second bevel gear 423 rotates, it drives the lead screw 420 to rotate. When the lead screw 420 rotates, it can drive the drive block 408 to move along the length direction of the lead screw 420. The drive block 408 moves towards the first fixed ring 401. At the same time, the support arm 404 rotates, driving the rotating shaft 409 to rotate. The rotating shaft 409 drives the brush 410 to rotate. The brush 410 continuously cleans the dust attached to the surface of the filter screen 4, ensuring that the dust on the entire surface of the filter screen 4 is cleaned, preventing dust from adhering to the surface of the filter screen 4 and reducing the filtration effect of the filter screen 4.

[0060] Simultaneously, as the drive block 408 moves along the length of the lead screw 420, the internally threaded tube 424 rotates under the action of the thread. The internally threaded tube 424 drives the third bevel gear 425 to rotate, the third bevel gear 425 drives the fourth bevel gear 427 to rotate, and the fourth bevel gear 427 drives the second rotating shaft 428 to rotate. The second rotating shaft 428 is connected to the first rotating shaft 406 via the belt ring 430, and the rotating shaft 409 drives the brush 410 to rotate. The brush 410 continuously cleans the dust adhering to the surface of the filter screen 4, ensuring that the dust on the entire surface of the filter screen 4 is cleaned, preventing dust from adhering to the surface of the filter screen 4 and reducing the filtration effect of the filter screen 4. When the drive block 408 moves towards the first fixed ring 401 to its maximum stroke, the drive motor 202 rotates in the opposite direction, causing the drive block 408 to reset during the movement.

Claims

1. An air purification device for pigsties, comprising a housing (1) and a fan (2) fixedly installed on the top of the housing (1), the fan (2) being connected to an air inlet pipe (3), and an air outlet pipe (5) being fixedly connected to the bottom of the housing (1), characterized in that: A filter screen (4) is provided on the top of the interior of the housing (1), and a dust removal unit (100) is installed on the top of the filter screen (4). The dust removal unit (100) includes a first fixed ring (401), a dust collection groove (402), a slider (403), a support arm (404), a fixed block (405), a first rotating shaft (406), a collection pipe (407), a drive block (408), a rotating shaft (409), and a brush (410). The first fixed ring (401) is fixedly connected to the inner wall of the housing (1). The first fixed ring (401) has a dust collection groove (402) on it. The slider 403 (403) is slidably connected to the inner wall of the dust collection groove (402). One end of the support arm (404) is fixedly connected to the first rotating shaft (406), and the other end of the support arm (404) is fixedly connected to the fixed block (405). The slider (403) and the fixed block (405) are magnetic, and the slider (403) and the fixed block (405) attract each other. The support arm (404) has a first sliding groove (4041) on the side near the filter screen (4). The first sliding groove (4041) is slidably connected to the drive block (408). The drive block (408) is rotatably connected to the rotating shaft (409). The rotating shaft (409) is fixedly connected to the brush (410). One end of the collection pipe (407) is connected to the dust collection tank (402), the collection pipe (407) passes through the dust collection pipe (414), the inner wall of the collection pipe (407) is fixedly connected to the dust filter (4071), the dust collection pipe (414) is fixedly connected to the collection tank (411), and the collection tank (411) is fixedly connected to the shell (1). A second fixing ring (415) is fixedly connected to the inner wall of the housing (1) near the bottom. A second sliding groove (416) is provided on the upper surface of the second fixing ring (415). A support column (417) is fixedly connected to the bottom wall of the second sliding groove (416). A filter layer one (418) is connected to the top of the support column (417). A filter layer two (419) is fixedly connected to the top of the filter layer one (418). The first rotating shaft (406) is rotatably connected to one end of the lead screw (420), the lead screw (420) is threadedly connected to the drive block (408), and the other end of the lead screw (420) is rotatably connected to the support arm (404). It also includes a transmission unit (200), which includes a mounting bracket (201) and a motor (202). The mounting bracket (201) is fixedly installed on the inner wall of the housing (1), and the motor (202) is fixedly installed on the top of the mounting bracket (201). The output end of the motor (202) is fixedly connected to the first rotating shaft (406). The mounting bracket (201) is fixedly connected to one end of the fixing tube (421), the inner wall of the fixing tube (421) is rotatably connected to the first rotating shaft (406), the other end of the fixing tube (421) is fixedly connected to the first bevel gear (422), the first bevel gear (422) meshes with the second bevel gear (423), and the second bevel gear (423) is fixedly connected to the lead screw (420). The lead screw (420) is threaded to the inner wall of the internal threaded tube (424), and the outer wall of the internal threaded tube (424) is fixedly connected to the third bevel gear (425). The third bevel gear (425) is fixedly connected to one end of the movable ring (426), and the other end of the movable ring (426) is rotatably connected to the drive block (408). The third bevel gear (425) meshes with the fourth bevel gear (427), and the fourth bevel gear (427) is fixedly connected to one end of the second rotating shaft (428). The other end of the second rotating shaft (428) is rotatably connected to the fixed block (429), and the fixed block (429) is connected to the drive block (408). The second rotating shaft (428) is connected to the first rotating shaft (406) through the belt ring (430).

2. The air purification device for pigsties as described in claim 1, characterized in that: The output shaft of the motor (202) passes through the through hole in the center of the filter screen (4) and is rotatably connected to the first rotating shaft (406).

3. The air purification device for pigsties as described in claim 1, characterized in that: A top cover (412) is fixedly installed on the top of the housing (1).

4. The air purification device for pigsties as described in claim 1, characterized in that: A hydraulic cylinder (413) is fixedly installed at the bottom of the housing (1).

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