A farm ventilation device

Abstract

This invention discloses a ventilation device for livestock farms, belonging to the technical field of ventilation equipment. The ventilation device includes a device plate and a cavity disposed within the device plate. The upper end of the device plate has a strip-shaped ventilation channel communicating with the cavity, and both sides of the lower end of the device plate have drainage channels communicating with the cavity. A grid plate is installed within the strip-shaped ventilation channel. A ventilation hood with an air intake at the bottom is slidably mounted on the inner top of the cavity. The device plate has a reciprocating part that drives the ventilation hood to slide back and forth along the strip-shaped ventilation channel. This invention can effectively reduce the upward dispersion of odors from the ground, significantly improve ventilation, and reduce the probability of disease in domestic pigs.

Description

Technical Field

[0001] This invention relates to the field of ventilation equipment technology, and more particularly to a ventilation device for livestock farms. Background Technology

[0002] A livestock farm is a place used to raise various poultry, livestock, or other economic animals. Depending on the species being raised, livestock farms can be divided into many types, such as chicken farms, pig farms, cattle farms, sheep farms, and fish farms.

[0003] During pig farming, it was found that the ground of the farm would continuously emit an odor due to the large amount of feces, food, and hair and dander from the pigs. These odors were mainly composed of ammonia, hydrogen sulfide, volatile fatty acids, indole and its derivatives. Therefore, ventilation of the farm was necessary. However, the existing ventilation methods were relatively simple and could not effectively remove the odors from the farm, making the pigs susceptible to illness due to the odors. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of poor ventilation effect of existing ventilation equipment in livestock farms, and to propose a ventilation device for livestock farms.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A ventilation device for a farm includes a device plate and a cavity disposed within the device plate. The upper end of the device plate has a strip-shaped ventilation channel communicating with the cavity, and both sides of the lower end of the device plate have drainage channels communicating with the cavity. A grid plate is installed within the strip-shaped ventilation channel. A ventilation hood with an air intake at the bottom is slidably mounted on the inner top of the cavity. The device plate has a reciprocating part that drives the ventilation hood to slide back and forth along the strip-shaped ventilation channel.

[0007] To improve ventilation, preferably, the reciprocating part includes a first reciprocating screw rotatably installed in the cavity. The first reciprocating screw is parallel to the strip-shaped ventilation groove. A slide is threadedly connected to the outer wall of the first reciprocating screw. The ventilation hood is fixedly connected to the slide. A drive motor that drives the first reciprocating screw to rotate is fixedly installed on the outer wall of the device plate.

[0008] To facilitate air intake by the ventilation hood, preferably, a negative pressure fan is fixedly installed on the outer wall of the device plate, and a telescopic hose is fixedly connected to the air intake end of the negative pressure fan. The end of the telescopic hose is fixedly connected to and communicates with the ventilation hood.

[0009] To increase the air intake area of ​​the strip ventilation slot, preferably, multiple air guide plates are rotatably installed inside the strip ventilation slot via a rotating shaft. The rotating shaft is located in the middle of the air guide plates. Each of the multiple air guide plates has a connecting rod at its lower end. The connecting rod is rotatably connected to the lower end of the air guide plate via a rotating rod. The cavity is provided with a swinging part that drives the air guide plates to swing back and forth. The axial cross-section of the strip ventilation slot is an inverted trapezoid.

[0010] To enable the air guide plate to oscillate back and forth within the strip ventilation slot, the oscillation part further includes a second reciprocating screw rotatably connected to the top of the cavity. The outer wall of the second reciprocating screw is threaded with a slider, wherein the slider is slidably connected to the inner wall of the cavity. The lower end of the slider is fixedly connected to a pull rod, and the end of the pull rod is fixedly connected to the bottom of one of the air guide plates with an elastic rope. The ventilation hood is connected to the second reciprocating screw through a linkage part.

[0011] To enable the second reciprocating screw to rotate back and forth, the linkage further includes a drum fixedly installed at the shaft end of the second reciprocating screw, with a pull rope fixedly wound around the outer wall of the drum, the end of the pull rope being fixedly connected to the top of the ventilation hood, and a torsion spring installed between the shaft end of the second reciprocating screw and the inner wall of the cavity.

[0012] To prevent the grating from being blocked by foreign objects, the upper end of the air guide plate is attached to the lower end face of the grating plate, and the lower end face of the grating plate is fixedly connected with protrusions arranged at equal intervals. When the air guide plate swings, the top of the air guide plate will sweep over the protrusions. The grating plate is longitudinally slidably installed in the strip ventilation groove, and a spring is installed between the lower end of the grating plate and the inner wall of the strip ventilation groove.

[0013] To facilitate the removal of fecal matter from the cavity, preferably, the bottom of the cavity is provided with a scraper that is fixedly connected to the ventilation hood, and the axial cross-section of the scraper is an isosceles trapezoid.

[0014] To reduce the residue of foreign objects on the scraper, spray pipes are fixedly installed on both sides of the lower end of the ventilation hood, and nozzles facing the outer wall of the two spray pipes are fixedly installed on their outer walls.

[0015] To facilitate air supply to the nozzle, a telescopic airbag is further installed between the ventilation hood and the inner wall of the cavity. An air intake pipe and an exhaust pipe are fixedly connected to the telescopic airbag and communicate with it. A one-way valve is fixedly installed inside both the air intake pipe and the exhaust pipe. The end of the exhaust pipe is fixedly connected to and communicates with the nozzle.

[0016] Compared with the prior art, the present invention provides a ventilation device for aquaculture farms, which has the following beneficial effects:

[0017] 1. The farm uses ventilation equipment that draws air into the ventilation hood through a telescopic flexible hose. The cavity then draws air from the farm through the strip ventilation channels, thus removing odors from the farm. Since the strip ventilation channels are set on the ground, it can effectively reduce the upward drift of odors from the ground and significantly improve the ventilation effect.

[0018] 2. The ventilation equipment used in this farm uses a drive motor to rotate the first reciprocating screw, which in turn drives the slide to slide back and forth along the inner wall of the cavity. The slide then drives the ventilation hood to slide back and forth within the cavity, thereby enabling the ventilation hood to provide more uniform ventilation to the farm, significantly improving the ventilation effect and reducing the probability of disease in domestic pigs.

[0019] 3. The ventilation equipment used in this farm uses a reciprocating ventilation hood that pulls a rope, causing multiple air guide plates to swing back and forth under the action of a connecting rod. This allows the strip ventilation channels to draw in air in different directions, thereby increasing the ventilation area of ​​the strip ventilation channels and thus improving the ventilation effect of the farm.

[0020] 4. The ventilation equipment used in this farm uses a reciprocating air guide plate that indirectly sweeps over the protrusions. The reciprocating air guide plate causes the grid plate to shake up and down, which can prevent the grid plate from being blocked by foreign objects, ensuring the ventilation efficiency of the strip ventilation channel for the farm, and the upper surface of the device plate will also be drier and more comfortable.

[0021] 5. The ventilation equipment used in this farm uses a reciprocating ventilation hood to drive a scraper at the bottom to slide back and forth in the cavity. The scraper pushes the manure and water in the cavity into the sewage trough, thereby improving the efficiency of manure and water discharge from the cavity. Attached Figure Description

[0022] Figure 1 This is an isometric structural diagram of a ventilation device for a livestock farm proposed in this invention;

[0023] Figure 2 This is a schematic diagram of the isometric structure of a ventilation device plate for a livestock farm proposed in this invention;

[0024] Figure 3 This is a schematic diagram of the isometric cross-section of a ventilation device for a livestock farm proposed in this invention;

[0025] Figure 4 This is a partial isometric structural diagram of a ventilation device for a livestock farm proposed in this invention;

[0026] Figure 5 This is a schematic diagram of the isometric structure of the air guide plate of a ventilation device for a livestock farm proposed in this invention;

[0027] Figure 6This is an isometric structural diagram of a ventilation hood for a livestock farm proposed in this invention;

[0028] Figure 7 This invention proposes a ventilation device for livestock farms. Figure 5 Schematic diagram of part A in the middle;

[0029] Figure 8 This is a schematic diagram of the second reciprocating lead screw structure of a ventilation device for a farm proposed in this invention.

[0030] In the diagram: 1. Device plate; 2. Strip ventilation slot; 3. Sewage discharge trough; 4. Grille plate; 5. Ventilation hood; 6. Air intake port; 7. First reciprocating screw; 8. Slide table; 9. Drive motor; 10. Rotary shaft; 11. Air guide plate; 12. Rotating rod; 13. Connecting rod; 14. Second reciprocating screw; 15. Slider; 16. Pull rod; 17. Elastic rope; 18. Drum; 19. Pull rope; 20. Spring; 21. Scraper; 22. Protrusion; 23. Negative pressure fan; 24. Telescopic hose; 25. Spray pipe; 26. Nozzle; 27. Telescopic airbag; 28. Exhaust pipe; 29. ​​Intake pipe; 30. Cavity. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Example 1:

[0034] Reference Figures 1-8A ventilation device for a livestock farm includes a device plate 1 for installation on the surface of the livestock farm, and a cavity 30 for storing some manure, disposed within the device plate 1. The upper end of the device plate 1 has a strip-shaped ventilation channel 2 communicating with the cavity 30, and both sides of the lower end of the device plate 1 have drainage channels 3 communicating with the cavity 30. A gate for opening and closing is installed within the drainage channels 3 (not shown in the figure). A grid plate 4 with mesh openings is installed within the strip-shaped ventilation channel 2. A ventilation hood 5 with an air intake 6 at the bottom is slidably installed on the inner top of the cavity 30. The device plate 1 has a reciprocating part that drives the ventilation hood 5 to slide back and forth along the strip-shaped ventilation channel 2. A negative pressure fan 23 is fixedly installed on the outer wall of the device plate 1. A telescopic hose 24 is fixedly connected to the air intake end of the negative pressure fan 23, and the end of the telescopic hose 24 is fixedly connected and communicates with the ventilation hood 5.

[0035] Specifically, in use, the device plate 1 is fixedly installed on the ground of the farm to replace the farm floor. Some of the urine and feces produced on the device plate 1 can then flow into the cavity 30 through the strip ventilation channel 2 to keep the device plate 1 dry. Then, the negative pressure fan 23 is activated. The negative pressure fan 23 draws air into the ventilation hood 5 through the telescopic hose 24. The ventilation hood 5 then draws air into the cavity 30 through the air intake 6. The cavity 30 then draws air from the farm through the strip ventilation channel 2, thus eliminating odors in the farm. The ventilation system effectively reduces the upward drift of odors from the ground due to the placement of the strip ventilation duct 2 on the ground, significantly improving ventilation. Some feces and pig urine on the upper surface of the device plate 1 can also be discharged into the cavity 30 through the strip ventilation duct 2. The grid plate 4 can prevent pigs from falling into the strip ventilation duct 2. During ventilation, the reciprocating part will drive the ventilation hood 5 to slide back and forth in the cavity 30, thereby enabling the ventilation hood 5 to provide more uniform ventilation to the farm, significantly improving the ventilation effect of the farm and reducing the probability of disease in domestic pigs.

[0036] Example 2:

[0037] Reference Figure 3 and Figure 4 It is basically the same as in Embodiment 1, but further discloses a specific implementation plan for the reciprocating section.

[0038] The reciprocating part includes a first reciprocating screw 7 rotatably installed in the cavity 30. The first reciprocating screw 7 is parallel to the strip ventilation groove 2. A slide table 8 is threadedly connected to the outer wall of the first reciprocating screw 7. The ventilation cover 5 is fixedly connected to the slide table 8. A drive motor 9 that drives the first reciprocating screw 7 to rotate is fixedly installed on the outer wall of the device plate 1.

[0039] Specifically, during use, the device plate 1 is fixedly installed on the ground of the farm to replace the farm floor. Some of the urine and feces produced on the device plate 1 can flow into the cavity 30 through the strip ventilation channel 2 to keep the device plate 1 dry. During ventilation, the drive motor 9 is started, which drives the first reciprocating screw 7 to rotate. The first reciprocating screw 7 drives the slide table 8 to slide back and forth along the inner wall of the cavity 30. The slide table 8 drives the ventilation hood 5 to slide back and forth within the cavity 30, thereby enabling the ventilation hood 5 to provide more uniform ventilation to the farm, significantly improving the ventilation effect of the farm and reducing the probability of disease in domestic pigs.

[0040] Example 3:

[0041] Reference Figures 3-8 The implementation is basically the same as in Example 2, but with a further addition: a specific implementation plan for increasing the air intake area of ​​the strip ventilation slot 2 is added.

[0042] Multiple air guide plates 11 are rotatably mounted inside the aforementioned strip ventilation slot 2 via a rotating shaft 10. The rotating shaft 10 is located in the middle of the air guide plates 11. Each air guide plate 11 has a connecting rod 13 at its lower end. The connecting rod 13 is rotatably connected to the lower end of the air guide plate 11 via a rotating rod 12. A swinging part is provided inside the cavity 30 to drive the air guide plates 11 to swing back and forth. The axial cross-section of the strip ventilation slot 2 is an inverted trapezoid, that is, the upper end of the strip ventilation slot 2 is larger than its lower end. The swinging part includes a second reciprocating screw 14 rotatably connected to the top of the cavity 30. A slider 15 is threadedly connected to the outer wall of the second reciprocating screw 14. The slider 15 is slidably connected to the inner wall of the cavity 30. A pull rod 16 is fixedly connected to the lower end of the slider 15. An elastic rope 17 is fixedly connected between the end of the pull rod 16 and the bottom of one of the air guide plates 11. The ventilation hood 5 is connected to the second reciprocating screw 14 via a linkage part.

[0043] Specifically, when the ventilation hood 5 slides back and forth, the linkage will drive the second reciprocating screw 14 to rotate, the second reciprocating screw 14 will drive the slider 15 to slide back and forth, the slider 15 will drive the pull rod 16 to slide back and forth, and the pull rod 16 will pull one of the air guide plates 11 to swing back and forth on the rotating shaft 10 through the elastic rope 17. Since the connecting rod 13 is connected to multiple air guide plates 11 through the rotating rod 12, the multiple air guide plates 11 will swing back and forth under the action of the connecting rod 13, which can make the strip ventilation channel 2 draw in air in different wind directions, thereby increasing the ventilation area of ​​the strip ventilation channel 2 and thus improving the ventilation effect of the farm.

[0044] The aforementioned linkage includes a drum 18 fixedly installed at the shaft end of the second reciprocating screw 14. A pull rope 19 is fixedly wound around the outer wall of the drum 18. The end of the pull rope 19 is fixedly connected to the top of the ventilation hood 5. A torsion spring is installed between the shaft end of the second reciprocating screw 14 and the inner wall of the cavity 30. The torsion spring is not shown in the figure.

[0045] Specifically, when the ventilation hood 5 slides towards both sides of the cavity 30, the ventilation hood 5 will pull the pull rope 19, and the pull rope 19 will be unloaded from the drum 18. The drum 18 will then drive the second reciprocating screw 14 to rotate. When the ventilation hood 5 moves to the middle of the cavity 30, the torsion spring will drive the second reciprocating screw 14 and the drum 18 to reverse and reset, and the drum 18 will wind the pull rope 19 again.

[0046] Example 4:

[0047] Reference Figure 5 and Figure 7 It is basically the same as in Embodiment 3, but further, a specific implementation plan for preventing the grating plate 4 from being blocked is added.

[0048] The upper end of the aforementioned air guide plate 11 is attached to the lower end face of the grille plate 4. The lower end face of the grille plate 4 is fixedly connected with protrusions 22 arranged at equal intervals. The number of protrusions 22 is 2 to 8, and the preferred number in this application is 6. When the air guide plate 11 swings, the top of the air guide plate 11 will sweep over the protrusions 22. The grille plate 4 is longitudinally slidably installed in the strip ventilation groove 2, and a spring 20 is installed between the lower end of the grille plate 4 and the inner wall of the strip ventilation groove 2.

[0049] Specifically, when the air guide plate 11 swings back and forth, it will indirectly sweep over the protrusion 22. When the protrusion 22 is pushed upward by the air guide plate 11, the protrusion 22 will drive the grid plate 4 to rise upward. When the air guide plate 11 sweeps over the protrusion 22, the spring 20 will drive the grid plate 4 to move downward and reset. Thus, the swinging air guide plate 11 will cause the grid plate 4 to shake up and down, which can prevent the grid plate 4 from being blocked by foreign objects, ensure the ventilation efficiency of the strip ventilation channel 2 for the farm, and make the upper surface of the device plate 1 drier and more comfortable.

[0050] Example 5:

[0051] Reference Figure 3 , Figure 4 as well as Figure 6 It is basically the same as Example 4, but further, a specific implementation plan is added to improve the efficiency of the cavity 30 in discharging fecal water.

[0052] The inner bottom of the cavity 30 is provided with a scraper 21 that is fixedly connected to the ventilation hood 5. The axial cross-section of the scraper 21 is an isosceles trapezoid.

[0053] Specifically, when it is necessary to clean the sewage in the cavity 30, the drain trough 3 is opened, and the sewage in the cavity 30 will be discharged through the drain trough 3. During this period, the reciprocating ventilation cover 5 will drive the scraper 21 at the bottom to reciprocate within the cavity 30. The scraper 21 will push the sewage in the cavity 30 into the drain trough 3, thereby improving the efficiency of sewage discharge from the cavity 30.

[0054] The lower ends of the ventilation hood 5 are fixedly installed with nozzles 25 on both sides. The outer walls of the two nozzles 25 are fixedly installed with nozzles 26 facing the outer wall of the scraper 21. A telescopic airbag 27 is installed between the ventilation hood 5 and the inner wall of the cavity 30. An air intake pipe 29 and an exhaust pipe 28 are fixedly connected to the telescopic airbag 27. A one-way valve is fixedly installed in both the air intake pipe 29 and the exhaust pipe 28. The end of the exhaust pipe 28 is fixedly connected to and communicates with the nozzles 25.

[0055] Specifically, when the ventilation hood 5 slides back and forth, the ventilation hood 5 will repeatedly stretch and compress the telescopic airbag 27. When the telescopic airbag 27 is compressed, it will blow air into the nozzle 25 through the exhaust pipe 28. The nozzle 25 will then spray the airflow onto the outer walls of both sides of the scraper 21 through the nozzle 26, thereby blowing off some of the dirt on the outer wall of the scraper 21, so that the scraper 21 can efficiently scrape off the fecal water in the cavity 30. When the telescopic airbag 27 is stretched, it will draw in air through the suction pipe 29.

[0056] This farm uses ventilation equipment. When in use, the device plate 1 is fixedly installed on the ground of the farm to replace the ground. Some of the urine and feces produced on the device plate 1 can flow into the cavity 30 through the strip ventilation channel 2 to keep the device plate 1 dry. Then, the negative pressure fan 23 is started. The negative pressure fan 23 will draw air into the ventilation hood 5 through the telescopic hose 24. The ventilation hood 5 will draw air into the cavity 30 through the air intake 6. The cavity 30 will draw air from the farm through the strip ventilation channel 2, which can remove the odor in the farm. Since the strip ventilation channel 2 is set on the ground, it can effectively reduce the upward drift of odors from the ground and significantly improve the ventilation effect. Some of the feces and pig urine on the upper surface of the device plate 1 can also be discharged into the cavity 30 through the strip ventilation channel 2. The grid plate 4 can prevent pigs from falling into the strip ventilation channel 2.

[0057] During ventilation, the drive motor 9 is started, which drives the first reciprocating screw 7 to rotate. The first reciprocating screw 7 then drives the slide table 8 to slide back and forth along the inner wall of the cavity 30. The slide table 8 then drives the ventilation hood 5 to slide back and forth within the cavity 30. This allows the ventilation hood 5 to provide more uniform ventilation to the farm, significantly improving the ventilation effect of the farm and reducing the probability of disease in domestic pigs.

[0058] As the ventilation hood 5 slides towards both sides of the cavity 30, the ventilation hood 5 pulls the pull rope 19, which is then unloaded from the drum 18. The drum 18 then drives the second reciprocating screw 14 to rotate, which in turn drives the slider 15 to reciprocate. The slider 15 then drives the pull rod 16 to slide back and forth. The pull rod 16 then pulls one of the air guide plates 11 to swing back and forth on the rotating shaft 10 via the elastic rope 17. Since the connecting rod 13 is connected to multiple air guide plates 11 through the rotating rod 12, the multiple air guide plates 11 will swing back and forth under the action of the connecting rod 13, which can make the strip ventilation channel 2 draw in air in different wind directions, thereby increasing the ventilation area of ​​the strip ventilation channel 2 and thus improving the ventilation effect of the farm. When the ventilation hood 5 moves to the middle of the cavity 30, the torsion spring will drive the second reciprocating screw 14 and the drum 18 to reverse and reset, and the drum 18 will wind the pull rope 19 again.

[0059] As the air guide plate 11 swings back and forth, it will indirectly sweep over the protrusion 22. When the protrusion 22 is pushed upward by the air guide plate 11, the protrusion 22 will drive the grid plate 4 to rise upward. When the air guide plate 11 sweeps over the protrusion 22, the spring 20 will drive the grid plate 4 to move downward and reset. Thus, the reciprocating air guide plate 11 will cause the grid plate 4 to shake up and down, which can prevent the grid plate 4 from being blocked by foreign objects, ensure the ventilation efficiency of the strip ventilation channel 2 for the farm, and make the upper surface of the device plate 1 drier and more comfortable.

[0060] When it is necessary to clean the sewage in the cavity 30, the drain trough 3 is opened, and the sewage in the cavity 30 will be discharged through the drain trough 3. During this period, the reciprocating sliding ventilation hood 5 will drive the scraper 21 at the bottom to reciprocate within the cavity 30. The scraper 21 will push the sewage in the cavity 30 into the drain trough 3, thereby improving the efficiency of sewage discharge from the cavity 30. When the ventilation hood 5 reciprocates, it will reciprocate to stretch and compress the telescopic airbag 27. When the telescopic airbag 27 is compressed, it will blow air into the nozzle 25 through the exhaust pipe 28. The nozzle 25 will then spray the airflow onto the outer walls of both sides of the scraper 21 through the nozzle 26, thereby blowing off some of the dirt on the outer wall of the scraper 21, so that the scraper 21 can efficiently scrape away the sewage in the cavity 30. When the telescopic airbag 27 is stretched, it will draw in air through the suction pipe 29.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A farm ventilation device comprising a device plate (1), characterized in that Also includes: A cavity (30) is disposed within the device plate (1). The upper end of the device plate (1) is provided with a strip ventilation groove (2) communicating with the cavity (30), and the lower end of the device plate (1) is provided with a sewage discharge groove (3) communicating with the cavity (30) on both sides. A grid plate (4) is installed in the strip ventilation groove (2). A ventilation hood (5) with an air intake (6) at the bottom is slidably mounted on the inner top of the cavity (30). The device plate (1) is provided with a reciprocating part that drives the ventilation hood (5) to slide back and forth along the strip ventilation groove (2); Multiple air guide plates (11) are rotatably installed in the strip ventilation slot (2) via a rotating shaft (10). The rotating shaft (10) is located in the middle of the air guide plate (11). Each of the multiple air guide plates (11) has a connecting rod (13) at its lower end. The connecting rod (13) is rotatably connected to the lower end of the air guide plate (11) via a rotating rod (12). The cavity (30) is provided with a swinging part that drives the air guide plate (11) to swing back and forth. The axial cross-section of the strip ventilation slot (2) is an inverted trapezoid. The swinging part includes a second reciprocating screw (14) rotatably connected to the top of the cavity (30), and a slider (15) is threadedly connected to the outer wall of the second reciprocating screw (14). The slider (15) is slidably connected to the inner wall of the cavity (30), the lower end of the slider (15) is fixedly connected to a pull rod (16), the end of the pull rod (16) is fixedly connected to the bottom of one of the air guide plates (11) with an elastic rope (17), and the ventilation hood (5) is connected to the second reciprocating screw (14) through a linkage part. The upper end of the air guide plate (11) is attached to the lower end face of the grille plate (4). The lower end face of the grille plate (4) is fixedly connected with protrusions (22) arranged at equal intervals. When the air guide plate (11) swings, the top of the air guide plate (11) will sweep over the protrusions (22). The grating plate (4) is longitudinally slidably installed in the strip ventilation groove (2), and a spring (20) is installed between the lower end of the grating plate (4) and the inner wall of the strip ventilation groove (2). The inner bottom of the cavity (30) is provided with a scraper (21) that is fixedly connected to the ventilation hood (5), and the axial cross-section of the scraper (21) is an isosceles trapezoid.

2. The ventilation equipment for a livestock farm according to claim 1, characterized in that, The reciprocating part includes a first reciprocating screw (7) rotatably installed in the cavity (30), the first reciprocating screw (7) is parallel to the strip ventilation groove (2), the outer wall of the first reciprocating screw (7) is threaded with a slide (8), the ventilation cover (5) is fixedly connected to the slide (8), and the outer wall of the device plate (1) is fixedly installed with a drive motor (9) that drives the first reciprocating screw (7) to rotate.

3. The ventilation equipment for a livestock farm according to claim 1, characterized in that, A negative pressure fan (23) is fixedly installed on the outer wall of the device plate (1). A telescopic hose (24) is fixedly connected to the suction end of the negative pressure fan (23). The end of the telescopic hose (24) is fixedly connected to and communicates with the ventilation hood (5).

4. A ventilation device for a livestock farm according to claim 1, characterized in that, The linkage includes a drum (18) fixedly installed at the shaft end of the second reciprocating screw (14), with a pull rope (19) fixedly wound around the outer wall of the drum (18), the end of the pull rope (19) being fixedly connected to the top of the ventilation hood (5), and a torsion spring installed between the shaft end of the second reciprocating screw (14) and the inner wall of the cavity (30).

5. A ventilation device for a livestock farm according to claim 1, characterized in that, Both sides of the lower end of the ventilation hood (5) are fixedly installed with nozzles (25), and the outer walls of the two nozzles (25) are fixedly installed with nozzles (26) facing the outer wall of the scraper (21).

6. A ventilation device for a livestock farm according to claim 5, characterized in that, A telescopic airbag (27) is installed between the ventilation hood (5) and the inner wall of the cavity (30). An air intake pipe (29) and an exhaust pipe (28) connected to the telescopic airbag (27) are fixedly connected. A one-way valve is fixedly installed in both the air intake pipe (29) and the exhaust pipe (28). The end of the exhaust pipe (28) is fixedly connected to and communicates with the nozzle (25).

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