Small arched shed for seedling culture

Abstract

The invention belongs to the technical field of agricultural facilities, and particularly relates to a small arched shed for seedling culture, which comprises a base, a plurality of groups of ground forks, inner frameworks, outer frameworks, an inner-layer net covering mechanism, an outer-layer film covering mechanism, a unit control mechanism and an axial ventilation mechanism, the plurality of groups of ground forks are arranged on the bottom wall of the base, and the plurality of groups of inner frameworks are arranged on the upper wall of the base; the outer frameworks are arranged on the upper wall of the portion, on the outer side of the inner framework, of the base, the inner layer net covering mechanism is arranged on the inner framework, the outer layer film covering mechanism is arranged on the outer frameworks, the unit control mechanism is arranged on the base, and the axial ventilation mechanism is arranged on the inner framework. According to the small arched shed for seedling raising, the opening of the shed can be automatically adjusted according to the temperature and humidity in the shed, external air flows into the shed, the growth environment of crops is ventilated, and when the shed is opened, external pests can be prevented from entering the shed.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural facilities, and in particular relates to a small arch shed for raising seedlings. Background Art

[0002] The small arch shed is one of the commonly used agricultural facilities for transplanting seedlings in agricultural cultivation. It mostly uses conventional frame materials and structures. In order to ensure structural stability and durability, its frame is generally made of metal welding. In order to reduce costs, its frame is also made of light materials such as bamboo, and then covered with plastic film to form a small arch shed.

[0003] The existing small arch sheds for raising seedlings have the following problems: In the daily management of existing seedling greenhouses, ventilation is achieved entirely by manually peeling off part or all of the film covering the greenhouse. Each operation is extremely inconvenient, labor-intensive and time-consuming. Moreover, once the film is partially or completely peeled off, the greenhouse loses its effective protective barrier, allowing various pests, birds and wild animals to easily enter and damage the crops inside. Therefore, it is unable to meet the existing demand for use of small arch sheds for raising seedlings. Summary of the Invention

[0004] In response to the above situation, in order to overcome the defects of the existing technology, this solution provides a small arch shed for raising seedlings that can automatically adjust the opening of the shed according to the temperature and humidity inside the shed, allowing outside air to flow into the shed to ventilate the growth environment of crops, and when the shed is open, it can prevent external pests from entering the shed.

[0005] The technical solution adopted in this scheme is as follows: This scheme proposes a small arch shed for raising seedlings, including a base, a ground fork, an inner frame, an outer frame, an inner layer covering net mechanism, an outer layer covering film mechanism, a unit control mechanism and an axial ventilation mechanism, multiple groups of the ground forks are arranged on the bottom wall of the base, multiple groups of the inner frame are arranged on the upper wall of the base, multiple groups of the outer frame are arranged on the upper wall of the base outside the inner frame, the inner layer covering net mechanism is arranged on the inner frame, the outer layer covering film mechanism is arranged on the outer frame, the unit control mechanism is arranged on the base, the axial ventilation mechanism is arranged on the inner frame, the inner layer covering net mechanism includes an inner drive component and a covering net component, the inner drive component is arranged inside the inner frame, the covering net component is arranged between the inner drive component and the base, the outer layer covering film mechanism includes an outer drive component and a covering film component, the outer drive component is arranged inside the outer frame, and the covering film component is arranged between the outer drive component and the base.

[0006] As a further preferred embodiment of the present invention, the internal drive assembly includes an inner through groove, an inner slider, an inner gear box, an inner drive motor, an inner arc-shaped rack, an inner drive shaft and an inner drive gear. The inner through groove is provided on the inner wall of the inner frame, and the inner through groove is provided through. The inner slider is slidably provided on the side wall of the inner frame at one end of the base. The inner gear box is provided on the side of the inner slider away from the inner frame. The inner drive motor is provided on the side of the inner gear box away from the inner slider. The power end of the inner drive motor is connected to the power input end of the inner gear box. The inner arc-shaped rack is provided on the side of the inner frame at one end of the base away from the inner drive motor. The inner driving shaft passes through the inner slider and is arranged at the power output end of the inner gear box. The end of the inner driving shaft away from the inner gear box is arranged inside the inner through groove. The inner driving gear is arranged at the end of the inner driving shaft close to the inner arc-shaped rack, and the inner driving gear is meshed with the inner arc-shaped rack; the mesh covering assembly includes an inner pull cylinder, a film and an inner receiving groove. The inner pull cylinder is rotatably arranged on the outside of the inner driving shaft, and the inner pull cylinder is slidably connected to the inner through groove. The inner receiving groove is arranged on the upper wall of the base below the inner pull cylinder, and the inner receiving groove is opened at the upper end. The film is arranged between the inner pull cylinder and the bottom wall of the inner receiving groove.

[0007] During use, a sealing strip is pre-arranged on the side wall of the inner pull cylinder, and the inner drive motor drives the internal gear of the inner gear box to rotate through the power end, and the inner gear box drives the inner drive shaft to rotate through the power output end, and the inner drive shaft drives the inner drive gear to roll along the inner arc-shaped rack, and the inner slider slides and rises along the side wall of the inner skeleton, and the inner drive shaft drives the film to stretch through the inner pull cylinder, and the film increases in length as the inner drive shaft rises, thereby covering the land under the inner skeleton. After the inner pull cylinder drives the sealing strips to fit together, the inner drive motor stops driving the film to stretch.

[0008] The outer gear is engaged with the outer gear of the driving member and the outer gear of the driving member.

[0009] When in use, a sealing strip is pre-arranged on the side wall of the outer pull cylinder, and the external drive motor drives the internal gear of the outer gear box to rotate through the power end, and the external drive motor drives the outer drive shaft to rotate through the power output end, and the outer drive shaft drives the outer drive gear to roll along the outer arc-shaped rack, and the outer slider slides and rises along the side wall of the outer skeleton, and the outer drive shaft drives the mesh to stretch through the outer pull cylinder, and the mesh increases in length as the outer drive shaft rises, thereby covering the land under the outer skeleton. After the outer pull cylinder drives the sealing strips to fit together, the external drive motor stops driving the mesh to stretch.

[0010] Specifically, the unit control mechanism includes a bracket, a controller and a temperature and humidity sensor. The bracket is arranged on the inner wall of the base, the controller is arranged on the upper wall of the bracket, and the temperature and humidity sensor is arranged on the upper wall of the bracket on one side of the controller.

[0011] When in use, the temperature and humidity sensor monitors the temperature and humidity of the environment inside the film and mesh in real time. For example, when the weather is hot, the film shrinks partially or completely, leaving only the mesh for ventilation and cooling; when it gets hotter, the mesh can be partially or completely shrunk as well; when the weather cools down, the operation is opposite.

[0012] Among them, the axial ventilation mechanism includes sealing membrane 1, sealing membrane 2 and magnetic strips. The sealing membrane 1 is arranged on the inner wall of the inner frame at both ends of the base, and the sealing membrane 2 is arranged on the inner wall of the inner frame on one side of the sealing membrane 1. The magnetic strips are respectively arranged on the side of the sealing membrane 1 and the sealing membrane 2 away from the inner wall of the inner frame. The magnetic strips arranged on the sealing membrane 1 and the magnetic strips arranged on the sealing membrane 2 are arranged with opposite poles, and the sealing membrane 1 and the sealing membrane 2 are respectively in contact with the upper wall of the base.

[0013] When in use, the sealing film 1 and the sealing film 2 are attracted to each other by the magnetic strips to seal the environment inside the film and the mesh. When the sealing film 1 and the sealing film 2 are pulled apart, the magnetic strips move in opposite directions to ventilate the environment inside the film and the mesh.

[0014] The beneficial effects achieved by adopting the above structure are as follows: Compared with the existing technology, this solution adopts a combination of an inner layer covering net mechanism, an outer layer covering film mechanism, a unit control mechanism and an axial ventilation mechanism. Through the provided internal drive component, covering net component, external drive component and covering film component, the growth environment of the film and the crops inside the mesh can be automatically adjusted according to the changing state of the external weather, so that the internal crops can grow better in an appropriate environment. When the weather is hot, the film shrinks partially or completely, leaving only the mesh for ventilation and cooling; when it is hotter, the mesh can be partially or completely shrunk; when the weather cools down, the operation is opposite. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of this scheme; Figure 2This is the main perspective view of this scheme; Figure 3 This is a schematic diagram of the internal structure of this scheme; Figure 4 Schematic diagram of the combined structure of the film and mesh membrane of this scheme; Figure 5 This is a schematic diagram of the combined structure of the internal drive component and the external drive component of this solution; Figure 6 This is the main view of this scheme; Figure 7 This is a side view of the scheme; Figure 8 This is a top view of the scheme; Figure 9 for Figure 8 AA section view; Figure 10 for Figure 8 BB partial cross-sectional view; Figure 11 for Figure 1 A magnified structural view of part I; Figure 12 for Figure 2 A magnified structural view of Part II; Figure 13 for Figure 10 A magnified structural view of part III.

[0016] Among them, 1. Base, 2. Ground fork, 3. Inner skeleton, 4. Inner cover net mechanism, 5. Inner drive assembly, 6. Inner through groove, 7. Inner slider, 8. Inner gear box, 9. Inner drive motor, 10. Inner arc rack, 11. Inner drive shaft, 12. Inner drive gear, 13. Cover net assembly, 14. Inner pull cylinder, 15. Film, 16. Inner storage tank, 17. Outer cover film mechanism, 18. Outer drive assembly, 19. Outer through groove, 20. Outer slide Block, 21. External gear box, 22. External drive motor, 23. Outer arc rack, 24. External drive shaft, 25. Outer drive gear, 26. Laminating assembly, 27. External pull cylinder, 28. Membrane, 29. External storage tank, 30. Unit control mechanism, 31. Bracket, 32. Controller, 33. Temperature and humidity sensor, 34. Axial ventilation mechanism, 35. Sealing membrane 1, 36. Sealing membrane 2, 37. Magnetic strip, 38. External skeleton.

[0017] The accompanying drawings are used to provide further understanding of the present solution and constitute a part of the specification. Together with the embodiments of the present solution, they are used to explain the present solution and do not constitute a limitation to the present solution. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of this solution will be clearly and completely described below in conjunction with the drawings in the embodiments of this solution. Obviously, the described embodiments are only part of the embodiments of this solution, not all of the embodiments; based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this solution.

[0019] In the description of this solution, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this solution.

[0020] like Figures 1-13 As shown, the present invention proposes a small arch shed for raising seedlings, comprising a base 1, a ground fork 2, an inner frame 3, an outer frame 38, an inner layer cover net mechanism 4, an outer layer cover film mechanism 17, a unit control mechanism 30 and an axial ventilation mechanism 34, multiple groups of the ground forks 2 are arranged on the bottom wall of the base 1, multiple groups of the inner frame 3 are arranged on the upper wall of the base 1, multiple groups of the outer frame 38 are arranged on the upper wall of the base 1 outside the inner frame 3, the inner layer cover net mechanism 4 is arranged on the inner frame 3, and the outer layer cover film mechanism 17 is arranged on the outer frame 38. The unit control mechanism 30 is arranged on the base 1, the axial ventilation mechanism 34 is arranged on the inner skeleton 3, the inner layer cover net mechanism 4 includes an inner drive component 5 and a cover net component 13, the inner drive component 5 is arranged inside the inner skeleton 3, the cover net component 13 is arranged between the inner drive component 5 and the base 1, the outer layer cover film mechanism 17 includes an outer drive component 18 and a cover film component 26, the outer drive component 18 is arranged inside the outer skeleton 38, and the cover film component 26 is arranged between the outer drive component 18 and the base 1.

[0021] The inner drive assembly 5 includes an inner through groove 6, an inner slider 7, an inner gear box 8, an inner drive motor 9, an inner arc-shaped rack 10, an inner drive shaft 11 and an inner drive gear 12. The inner through groove 6 is provided on the inner wall of the inner skeleton 3, and the inner through groove 6 is provided through. The inner slider 7 is slidably provided on the side wall of the inner skeleton 3 at one end of the base 1. The inner gear box 8 is provided on the side of the inner slider 7 away from the inner skeleton 3. The inner drive motor 9 is provided on the side of the inner gear box 8 away from the inner slider 7. The power end of the inner drive motor 9 is connected to the power input end of the inner gear box 8. The inner arc-shaped rack 10 is provided on the side wall of the inner skeleton 3 at one end of the base 1 away from the inner drive motor 9. The inner drive shaft 11 passes through the inner slider 7 is arranged at the power output end of the internal gear box 8, and the end of the inner drive shaft 11 away from the internal gear box 8 is arranged inside the inner through groove 6, and the inner layer drive gear 12 is arranged at the end of the inner drive shaft 11 close to the inner layer arc rack 10, and the inner layer drive gear 12 is engaged with the inner layer arc rack 10; the net covering assembly 13 includes an inner pull cylinder 14, a film 15 and an inner receiving groove 16, and the inner pull cylinder 14 is rotatably arranged on the outside of the inner drive shaft 11, and the inner pull cylinder 14 is slidably connected to the inner through groove 6, and the inner receiving groove 16 is arranged on the upper wall of the base 1 below the inner pull cylinder 14, and the inner receiving groove 16 is opened at the upper end, and the film 15 is arranged between the inner pull cylinder 14 and the bottom wall of the inner receiving groove 16.

[0022] The external drive assembly 18 includes an external through groove 19, an external slider 20, an external gear box 21, an external drive motor 22, an outer arc-shaped rack 23, an external drive shaft 24 and an outer drive gear 25. The external through groove 19 is provided on the inner wall of the outer skeleton 38. The external through groove 19 is provided through. The external slider 20 is slidably provided on the side wall of the outer skeleton 38 on the side of the base 1 close to the inner slider 7. The external gear box 21 is provided on the side of the outer slider 20 away from the outer skeleton 38. The external drive motor 22 is provided at the power input end of the external gear box 21. The outer arc-shaped rack 23 is provided on the side of the base 1 away from the outer The inner wall of the outer skeleton 38 at one end of the drive motor 22, the outer drive shaft 24 passes through the outer slider 20 and is arranged at the power output end of the outer drive motor 22, the outer layer drive gear 25 is arranged at one end of the outer drive shaft 24 close to the outer layer arc rack 23, and the outer layer arc rack 23 is engaged with the outer layer drive gear 25; the coating assembly 26 includes an outer pull cylinder 27, a mesh 28 and an outer receiving groove 29, the outer pull cylinder 27 is rotatably arranged on the outside of the outer drive shaft 24, the outer pull cylinder 27 is slidably connected to the outer through groove 19, and the mesh 28 is arranged between the bottom wall of the outer receiving groove 29 and the outer pull cylinder 27.

[0023] The unit control mechanism 30 includes a bracket 31 , a controller 32 and a temperature and humidity sensor 33 . The bracket 31 is arranged on the inner wall of the base 1 , the controller 32 is arranged on the upper wall of the bracket 31 , and the temperature and humidity sensor 33 is arranged on the upper wall of the bracket 31 on one side of the controller 32 .

[0024] The axial ventilation mechanism 34 includes a sealing membrane 1 35, a sealing membrane 2 36 and a magnetic strip 37. The sealing membrane 1 35 is arranged on the inner wall of the inner skeleton 3 at both ends of the base 1, and the sealing membrane 2 36 is arranged on the inner wall of the inner skeleton 3 on one side of the sealing membrane 1 35. The magnetic strip 37 is respectively arranged on the side of the sealing membrane 1 35 and the sealing membrane 2 36 away from the inner wall of the inner skeleton 3. The magnetic strip 37 set on the sealing membrane 1 35 and the magnetic strip 37 set on the sealing membrane 2 36 are arranged at opposite poles, and the sealing membrane 1 35 and the sealing membrane 2 36 are respectively in contact with the upper wall of the base 1.

[0025] When in use, the ground fork 2 is inserted into the soil, and the base 1 is fixed to the seedling field. In the initial state, the inner drive motor 9 and the outer drive motor 22 are respectively placed at the lowest points of the inner frame 3 and the outer frame 38. The space formed by the base 1, the inner frame 3 and the outer frame 38 is open. After the seedlings are planted on the land surrounded by the base 1, the land surrounded by the base 1 is covered with a film. The inner film is coated, and a sealing strip is pre-arranged on the side wall of the inner pull cylinder 14. The controller 32 is remotely operated. The controller 32 controls the inner drive motor 9 to start. The inner drive motor 9 drives the inner gear of the inner gear box 8 to rotate through the positive rotation of the power end. The inner gear box 8 drives the inner drive shaft 11 to rotate through the power output end. The inner drive shaft 11 drives the inner layer drive gear 12 to roll along the inner layer arc-shaped rack 10. The inner slider 7 slides and rises along the side wall of the inner skeleton 3. The inner drive shaft 11 drives the film 15 to stretch through the inner pull cylinder 14. The film 15 increases its stretching length as the inner drive shaft 11 rises, thereby covering the land under the inner skeleton 3. After the inner pull cylinder 14 drives the sealing strips to fit together, the controller 32 controls the inner drive motor 9 to stop driving the film 15 to stretch. The outer film is coated, and a sealing strip is pre-arranged on the side wall of the outer pull cylinder 27. The controller 32 is remotely operated, and the controller 32 controls the outer drive motor 22 to start. The outer drive motor 22 drives the internal gear of the outer gear box 21 to rotate through the positive rotation of the power end. The outer drive motor 22 drives the outer drive shaft 24 to rotate through the power output end. The outer drive shaft 24 drives the outer layer drive gear 25 to roll along the outer layer arc-shaped rack 23. The outer slider 20 slides and rises along the side wall of the outer skeleton 38. The outer drive shaft 24 drives the mesh 28 to stretch through the outer pull cylinder 27. The mesh 28 increases its stretching length as the outer drive shaft 24 rises, thereby covering the land under the outer skeleton 38. After the outer pull cylinder 27 drives the sealing strips to fit together, the outer drive motor 22 stops driving the mesh 28 to stretch. The controller 32 is remotely operated, and the controller 32 controls the activation of the temperature and humidity sensor 33. The temperature and humidity sensor 33 monitors the temperature and humidity of the environment inside the film 15 and the mesh 28 in real time. When the weather is hot, the controller 32 controls the power end of the internal drive motor 9 to reverse, and the power end of the internal drive motor 9 drives the inner pull cylinder 14 to descend through the inner drive shaft 11. The inner pull cylinder 14 drives the film 15 to partially or completely retract, and the inner pull cylinder 14 drives the sealing strip to move in opposite directions. After the film 15 is opened, the mesh 28 is used. On the one hand, the outside air passes through the mesh 28 to ventilate, breathe, and cool the crops surrounded by the base 1; on the other hand, it prevents insects, birds, and wild animals from entering. When the weather gets hotter, the controller 32 controls the external drive motor 22 to start, and the power end of the external drive motor 22 reverses to drive the external drive shaft 24 to rotate, and the external drive shaft 24 drives the external pull cylinder 27 to descend, and the external pull cylinder 27 drives the mesh 28 to partially or completely retract, ensuring that the crops enclosed inside the base 1 are in an adapted growth environment; When the weather cools down, the operation is reversed, and the crops on the land surrounded by the base 1 are covered with the film 15 and the mesh 28 to ensure the temperature and humidity of the crop growth environment; The sealing film 1 35 and the sealing film 2 36 are attracted to each other by the magnetic strip 37 to seal the environment inside the film 15 and the mesh 28. When the environment surrounded by the base 1 needs to be ventilated, the sealing film 1 35 and the sealing film 2 36 are pulled apart, and the magnetic strip 37 moves away from each other. The sealing film 1 35 and the sealing film 2 36 move away from each other, and the area surrounded by the base 1 is opened in the axial direction for ventilation of the internal environment of the film 15 and the mesh 28. The above operation can be repeated the next time it is used.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] The above description of the present solution and its implementation methods is non-limiting. The drawings show only one implementation method of the present solution, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present solution, designs a similar structure and embodiment without creatively designing, they shall fall within the scope of protection of the present solution.

Claims

1. A small arch shed for raising seedlings, comprising a base and a ground fork, characterized in that: It also includes an inner skeleton, an outer skeleton, an inner layer cover net mechanism, an outer layer cover film mechanism, a unit control mechanism and an axial ventilation mechanism, multiple groups of the ground forks are arranged on the bottom wall of the base, multiple groups of the inner skeleton are arranged on the upper wall of the base, multiple groups of the outer skeleton are arranged on the upper wall of the base outside the inner skeleton, the inner layer cover net mechanism is arranged on the inner skeleton, the outer layer cover film mechanism is arranged on the outer skeleton, the unit control mechanism is arranged on the base, the axial ventilation mechanism is arranged on the inner skeleton, the inner layer cover net mechanism includes an inner drive component and a cover net component, the inner drive component is arranged inside the inner skeleton, the cover net component is arranged between the inner drive component and the base, the outer layer cover film mechanism includes an outer drive component and a cover film component, the outer drive component is arranged inside the outer skeleton, and the cover film component is arranged between the outer drive component and the base; The inner drive assembly includes an inner drive shaft and an inner through slot; The net covering assembly includes an inner pull cylinder, a film and an inner receiving groove. The inner pull cylinder is rotatably arranged on the outside of the inner drive shaft, and the inner pull cylinder is slidably connected to the inner through groove. The inner receiving groove is arranged on the upper wall of the base below the inner pull cylinder, and the inner receiving groove is opened at the upper end. The film is arranged between the inner pull cylinder and the bottom wall of the inner receiving groove. The external drive assembly includes an external through slot and an external drive shaft; The coating assembly includes an outer pull cylinder, a mesh and an outer receiving groove. The outer pull cylinder is rotatably arranged outside the outer driving shaft and is slidingly connected to the outer through groove. The mesh is arranged between the bottom wall of the outer receiving groove and the outer pull cylinder.

2. The small arch shed for raising seedlings according to claim 1, characterized in that: The internal drive assembly includes an inner slider, an internal gear box, an internal drive motor, an inner arc-shaped rack and an inner drive gear. The inner through groove is provided on the inner wall of the inner frame, and the inner through groove is provided for penetration. The inner slider is slidingly provided on the side wall of the inner frame at one end of the base. The internal gear box is provided on the side of the inner slider away from the inner frame. The internal drive motor is provided on the side of the internal gear box away from the inner slider. The power end of the internal drive motor is connected to the power input end of the internal gear box. The inner arc-shaped rack is provided on the side wall of the inner frame at one end of the base away from the internal drive motor.

3. The small arch shed for raising seedlings according to claim 2, characterized in that: The inner drive shaft passes through the inner slider and is arranged at the power output end of the inner gear box. The end of the inner drive shaft away from the inner gear box is arranged inside the inner through groove. The inner layer drive gear is arranged at the end of the inner drive shaft close to the inner layer arc rack, and the inner layer drive gear is meshed with the inner layer arc rack.

4. The small arch shed for raising seedlings according to claim 3, characterized in that: The external drive assembly includes an outer slider, an external gear box, an external drive motor, an outer arc-shaped rack and an outer drive gear. The outer through groove is arranged on the inner wall of the outer frame, and the outer through groove is arranged to be through. The outer slider is slidably arranged on the side wall of the outer frame on the side of the base close to the inner slider. The external gear box is arranged on the side of the outer slider away from the outer frame. The external drive motor is arranged at the power input end of the external gear box. The outer arc-shaped rack is arranged on the inner wall of the outer frame at the end of the base away from the external drive motor.

5. The small arch shed for raising seedlings according to claim 4, characterized in that: The outer drive shaft passes through the outer slider and is arranged at the power output end of the outer drive motor. The outer drive gear is arranged at one end of the outer drive shaft close to the outer arc rack, and the outer arc rack is meshed with the outer drive gear.

6. The small arch shed for raising seedlings according to claim 5, characterized in that: The unit control mechanism includes a bracket, a controller and a temperature and humidity sensor. The bracket is arranged on the inner wall of the base, the controller is arranged on the upper wall of the bracket, and the temperature and humidity sensor is arranged on the upper wall of the bracket on one side of the controller.

7. The small arch shed for raising seedlings according to claim 6, characterized in that: The axial ventilation mechanism includes a sealing membrane 1, a sealing membrane 2 and a magnetic strip. The sealing membrane 1 is arranged on the inner wall of the inner frame at both ends of the base, and the sealing membrane 2 is arranged on the inner wall of the inner frame on one side of the sealing membrane 1. The magnetic strips are respectively arranged on the side of the sealing membrane 1 and the sealing membrane 2 away from the inner wall of the inner frame. The magnetic strips set on the sealing membrane 1 and the magnetic strips set on the sealing membrane 2 are set at opposite poles, and the sealing membrane 1 and the sealing membrane 2 are respectively in contact with the upper wall of the base.

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