Open-close type full-automatic multifunctional plastic greenhouse

Abstract

The invention discloses an open-close type full-automatic multifunctional plastic greenhouse, and belongs to the technical field of agricultural greenhouses, the open-close type full-automatic multifunctional plastic greenhouse comprises a greenhouse film which is laid on the outer side of an arch pipe, and a film pressing belt which can be tightened or loosened is arranged on the outer side of the greenhouse film; the film rolling shafts are located between the film pressing belt and the arch pipe, and the two ends of the greenhouse film are fixed to the two film rolling shafts respectively; the square frames are arranged at the two ends of the film rolling shaft, and the film rolling shaft is elastically connected with the square frames in the diameter direction of the arch pipe; by means of the device, the greenhouse film can be wound or released conveniently, even if the wound greenhouse film is too loose due to the fact that the film winding shaft slips in the greenhouse film winding process, the greenhouse film can be in a straightened state to be laid on the outer side of the arch pipe in the greenhouse film releasing process, and due to the fact that wrinkles are avoided, the greenhouse film can be laid on the outer side of the arch pipe in the greenhouse film releasing process. And when the film pressing belt is pressed on the outer side of the greenhouse film, the greenhouse film cannot be damaged due to wrinkles, and therefore the greenhouse film can be protected.

Description

Technical Field

[0001] This invention relates to the field of agricultural greenhouse technology, and in particular to a fully automatic, multifunctional plastic greenhouse that can be opened and closed. Background Technology

[0002] Jujube tree greenhouses are agricultural facilities specifically built for the growth of jujube trees, allowing for controlled temperature and humidity and protection against adverse external environments. Their core function is to overcome the limitations of natural climate, enabling jujube trees to produce early, high-yield, and off-season fruit. They are especially suitable for areas where open-air, high-efficiency jujube tree cultivation is not feasible, such as the low temperatures and windy conditions in the north or the heavy rainfall in the south.

[0003] Its main structure is purely mechanical, with the frame mostly made of hot-dip galvanized steel pipes or aluminum alloy, providing wind and pressure resistance. The top and sides are covered with aging-resistant film. Some high-end greenhouses are equipped with manual / electric film rollers to regulate ventilation and light inside the greenhouse. Functionally, the film's insulation properties maintain the temperature inside the greenhouse at no less than 5℃ in winter, meeting the dormancy and budding needs of the jujube trees. In summer, the film rollers and shade nets reduce the high temperature inside the greenhouse. At the same time, a manual irrigation system (such as drip irrigation or sprinkler irrigation) can precisely control soil moisture, avoiding root rot or drought problems caused by excessive rain in open-field planting, ultimately improving the quality and yield of jujube fruit.

[0004] Chinese invention patent CN109479585A discloses a greenhouse film winding device. By rotating a slider and a first rotating rod relative to each other, and by rotating the first rotating rod and a second rotating rod relative to each other, the first winding roller can move along the greenhouse contour during the winding process, making it suitable for different greenhouse contours.

[0005] The aforementioned device achieves the winding and unfolding of the greenhouse film through a winding mechanism. However, when the greenhouse film is wound loosely, wrinkles are likely to appear during the unfolding process, which prevents the film from fully adhering to the outside of the greenhouse frame. Furthermore, the lack of proper fixation makes the film prone to being blown away in windy weather, thus affecting its heat preservation effect.

[0006] Therefore, it is necessary to provide a fully automatic, multi-functional plastic greenhouse that can be opened and closed to solve the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this invention is to provide a fully automatic multifunctional plastic greenhouse that can be opened and closed, in order to solve the problem mentioned in the background art that the existing device achieves the winding and unfolding of the greenhouse film through a winding device, but when the greenhouse film is rolled loosely, wrinkles are easily formed during the unfolding process, so that the greenhouse film cannot completely fit the outside of the greenhouse frame.

[0008] Based on the above ideas, the present invention provides the following technical solution: a fully automatic, multi-functional plastic greenhouse with an opening and closing mechanism, comprising: The greenhouse film is laid on the outside of the arch pipe, and the outside of the greenhouse film is provided with a film-pressing belt that can be tightened or loosened; A film-rolling shaft is located between the pressing belt and the arch pipe, and both ends of the greenhouse film are fixed to two sets of film-rolling shafts respectively; A square frame is set at both ends of the film roll shaft. The film roll shaft is elastically connected to the square frame along the diameter direction of the arch tube. Through the pressure between the film roll shaft and the arch tube, the film roll shaft can rotate along its own axis direction when it moves along the outer circle surface of the arch tube to realize the rolling or unfolding of the greenhouse film. An anti-rotation component is disposed between the film roll shaft and the square frame. During the process of the film roll shaft moving downward along the arch tube to unfold the greenhouse film, the tension of the taut greenhouse film on the film roll shaft enables the film roll shaft to overcome the force of the anti-rotation component and rotate relative to the square frame to unfold the greenhouse film.

[0009] As a further aspect of the present invention: the two ends of the pressure film belt are respectively connected to the pressure film belt tube and the pressure film belt tightening tube, and the pressure film belt can be tightened or loosened by rotating the pressure film belt tightening tube in different directions.

[0010] As a further aspect of the present invention: both ends of the film roll are provided with square frames, and a slider is elastically connected inside the square frame along the diameter direction of the arch tube. A connecting shaft is fixed at the end of the film roll, and the connecting shaft is rotatably engaged with the slider through a one-way bearing.

[0011] As a further embodiment of the present invention: a friction element is provided at the slider, the friction element is in contact with the outer ring of the one-way bearing, an adjusting bolt is provided at the slider, the adjusting bolt is threadedly connected to the slider, and the bottom end of the adjusting bolt is rotatably connected to the friction element.

[0012] As a further aspect of the present invention: traction components are provided at both the front and rear ends of the greenhouse, and the traction components are configured to drive the film rolling shaft to reciprocate along the circumference of the arch tube to realize the unfolding or rolling of the greenhouse film.

[0013] As a further aspect of the present invention: the traction member is configured as a closed ring structure along the circumference of the arch tube, and a clamp that cooperates with the traction member is provided at the square frame, and the clamps at the two sets of square frames are respectively fixedly connected to different sides of the traction member.

[0014] As a further aspect of the present invention: an insect-proof net is provided between the frame and the greenhouse film.

[0015] As a further aspect of the present invention: the traction component is provided with an inner support tube and an outer support tube, and the two sides of the traction component rest on the inner support tube and the outer support tube respectively.

[0016] As a further aspect of the present invention: two sets of limiting parts are fixed on the square frame, the limiting parts being arc-shaped and able to fit against both sides of the inner support tube to restrict the square frame in the diameter direction of the arch tube.

[0017] As a further aspect of the present invention: a film-clamping groove is provided at the highest point of the arch pipe, and the portion of the greenhouse film located between the two film roll shafts is fixed to the film-clamping groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are: this device facilitates the winding or unwinding of the greenhouse film, and even if the film roller slips during the winding process, resulting in the rolled film being too loose, the greenhouse film can still be laid taut on the outside of the arch tube during the unwinding process. Since wrinkles are avoided, the film pressing belt will not damage the greenhouse film due to the presence of wrinkles when it is pressed tightly on the outside of the greenhouse film, thus helping to protect the greenhouse film. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a structural schematic diagram of the inner support tube, outer support tube, and fixing component of the present invention; Figure 4 This is the front view of the present invention; Figure 5 This is a schematic diagram of the traction component structure of the present invention; Figure 6 This is a schematic diagram of the clamp structure of the present invention; Figure 7 This is a schematic diagram of the connection structure between the connecting shaft and the slider of the present invention; Figure 8 This is a schematic diagram of the friction element of the present invention; Figure 9 This is the present invention. Figure 4 A magnified structural diagram at point A; Figure 10 This is the present invention. Figure 3 A magnified structural diagram at point B; Figure 11 This is a schematic diagram of the limiting part structure of the present invention.

[0021] In the diagram: 1. Greenhouse film; 2. Film pressing belt; 3. Insect-proof net; 4. Longitudinal steel pipe; 5. Arch pipe; 6. Fixing pipe; 7. Wall; 8. First transmission component; 9. Film pressing belt tightening pipe; 10. Second transmission component; 11. Rotating shaft; 12. Inner support pipe; 13. Outer support pipe; 14. Film pressing belt fixing pipe; 15. Film rolling shaft; 1501. Connecting shaft; 16. Traction component; 17. Slider; 18. Square frame; 19. Fixing component; 20. Clamp; 2001. Main pressure plate; 2002. Secondary pressure plate; 21. Elastic component; 22. Guide shaft; 23. Friction component; 24. Adjusting bolt; 25. Collar; 26. One-way bearing; 27. Limiting part. Detailed Implementation

[0022] like Figures 1-11 As shown, a fully automatic, multi-functional plastic greenhouse with an openable and closable design includes a frame and a greenhouse film 1 laid on the frame. The greenhouse film 1 is retractable and located on the outside of the frame. Specifically, when it rains, the greenhouse film 1 automatically falls to ensure that the jujube trees inside the greenhouse are not wet. After the rain stops, the greenhouse film 1 automatically rolls up to avoid affecting sunlight and to ensure that the jujube trees inside the greenhouse do not suffer from heat damage due to excessive temperature. In addition, when the temperature is high (above 35 degrees Celsius), the greenhouse film 1 automatically rolls up to cool down; when the temperature is low (below 15 degrees Celsius), the greenhouse film 1 automatically falls down to keep warm. This structure can effectively control pests and diseases.

[0023] An insect-proof net 3 is installed between the frame and the greenhouse film 1. The insect-proof net 3 can effectively prevent some harmful insects from entering the greenhouse and harming the jujube trees, and has a significant effect on the prevention and control of jujube witches' broom disease spread by insects.

[0024] Combination Figures 1-2 As shown, multiple sets of film-pressing strips 2 are provided on the outside of the greenhouse film 1. Specifically, film-pressing strip tubes 14 and film-pressing strip tightening tubes 9 are respectively provided on both sides of the greenhouse and near the bottom. In actual use, one end of the film-pressing strip 2 is fixed to the film-pressing strip tube 14, and the other end of the film-pressing strip 2 is fixed to the film-pressing strip tightening tube 9. During the process of rolling up the greenhouse film 1, the film-pressing strip tightening tube 9 is rotated to loosen the film-pressing strip 2, which is conducive to the rolling up of the greenhouse film 1. When the greenhouse film 1 is unfolded and covers the outside of the frame, the film-pressing strip tightening tube 9 can be rotated in the opposite direction so that the film-pressing strip 2 is tightly attached to the outside of the greenhouse film 1, which can prevent the greenhouse film 1 from being blown away by strong winds and is conducive to protecting the greenhouse film 1.

[0025] The skeleton includes multiple sets of arch pipes 5 arranged in a straight line array. The cross-section of the arch pipes 5 can be square or circular. In specific installation, multiple sets of fixing pipes 6 are installed on the cast wall 7. The fixing pipes 6 and the arch pipes 5 are distributed at equal intervals and the fixing pipes 6 are welded to the arch pipes 5. Further, multiple sets of longitudinal steel pipes 4 are arranged along the direction of the arch pipe array. The longitudinal steel pipes 4 are evenly distributed along the circumference of the arch pipes 5 and the longitudinal steel pipes 4 are fixedly connected to the arch pipes 5.

[0026] In actual use, to facilitate the unfolding or rewinding of the greenhouse film 1, film rollers 15 are arranged on both sides of the frame. The film rollers 15 are located between the greenhouse film 1 and the pressing belt 2. Both ends of the greenhouse film 1 are fixedly connected to the film rollers 15. The unfolding or rewinding of the greenhouse film 1 can be achieved by rotating the film rollers 15 in both directions. Furthermore, to further secure the greenhouse film 1, a film-holding groove is provided at the highest point of the frame, and the portion of the greenhouse film 1 located between the two film rollers 15 is fixed to the film-holding groove.

[0027] Traction members 16 are provided at both the front and rear ends of the frame. The traction members 16 are configured to drive the film roll shaft 15 to reciprocate along the circumference of the arch tube 5, so as to realize the unfolding or rewinding of the greenhouse film 1. A square frame 18 is provided at both ends of the film roll shaft 15. The film roll shaft 15 can rotate relative to the square frame 18 along its own circumference. The film roll shaft 15 is elastically connected to the square frame 18 along the diameter of the arch tube 5, so that the film roll shaft 15 can always be in contact with multiple sets of arch tubes 5. On the one hand, it is beneficial to support the film roll shaft 15, especially when the span of the arch tube 5 is large, which can improve the structural stability of the arch tube 5. On the other hand, it is beneficial to roll up or release the greenhouse film 1.

[0028] The square frame 18 is provided with a clamp 20 that cooperates with the traction component 16. Figure 2 , Figure 5 As shown, the traction member 16 is a closed ring structure along the circumference of the arch tube 5, and the clamps 20 at the two sets of square frames 18 are fixedly connected to different sides of the traction member 16. Through this structure, during the rotation of the traction member 16, the two sets of film winding shafts 15 can move closer or further apart, thereby realizing the winding or unwinding of the greenhouse film 1. Compared with traditional winding devices, this solution only requires one set of motors to realize the unwinding or winding of the greenhouse film 1, which is beneficial for saving costs and reducing the floor space.

[0029] Although the pressure belt 2 can fix the greenhouse film 1, when the laid greenhouse film 1 has wrinkles, the pressure belt 2 will further compress the wrinkles during the pressing process, resulting in "creases" on the greenhouse film 1. Over time, this will damage the greenhouse film 1. Based on this, this solution provides an anti-rotation component between the film roll shaft 15 and the square frame 18, so that the greenhouse film 1 can be kept in a taut state during the unfolding process, thereby driving the film roll shaft 15 to rotate through the tension of the greenhouse film 1 on the film roll shaft 15. The anti-rotation component will be further explained below with reference to specific embodiments.

[0030] A slider 17 is elastically connected inside the square frame 18 along the diameter direction of the arch tube 5. A connecting shaft 1501 is fixed to the end of the film rolling shaft 15. One end of the connecting shaft 1501 extends into the slider 17 and can rotate relative to the slider 17. Furthermore, combined Figures 5-8 As shown, the slider 17 has a stepped hole on the side near the film winding shaft 15 for mounting the connecting shaft 1501. A one-way bearing 26, sleeved on the outside of the connecting shaft 1501, is located within this stepped hole. A friction element 23 is arranged within the stepped hole. The friction element 23 is an arc-shaped plate structure that can fit against the outer ring of the one-way bearing 26. An adjusting bolt 24 is provided at the slider 17, threadedly connected to the slider 17. The bottom end of the adjusting bolt 24 is rotatably connected to the friction element 23. Through this structure, during the rotation of the adjusting bolt 24, the friction element 23 can move along the diameter of the stepped hole and press against the outer ring of the one-way bearing 26, allowing the connecting shaft 1501 to rotate only in one direction relative to the slider 17 under certain conditions.

[0031] When it is necessary to roll up the greenhouse film 1, the pressure belt tightening tube 9 is driven to rotate to release the pressure belt 2, which facilitates the film roll shaft 15 to roll up the greenhouse film 1. Then, the traction member 16 is driven to rotate to drive the two film roll shafts 15 to move closer to each other. During the process of the film roll shaft 15 moving upward along the arch tube 5, the connecting shaft 1501 at the end of the film roll shaft 15 can rotate relative to the slider 17 through the one-way bearing 26. The film roll shaft 15 is in contact with the arch tube 5 under elastic force. Through the interaction force between the arch tube 5 and the film roll shaft 15, the film roll shaft 15 can rotate around its own axis during the movement outside the arch tube 5 to roll up the greenhouse film 1. When the greenhouse film 1 needs to be unfolded, the driving traction member 16 rotates in the opposite direction so that the two film roll shafts 15 can move away from each other. The greenhouse film 1 on the outside of the film roll shaft 15 can be released and laid on the outside of the frame. During this process, if the connecting shaft 1501 rotates relative to the slider 17, it needs to drive the one-way bearing 26 to rotate synchronously. It should be noted that, due to the setting of the friction member 23, during the process of the film roll shaft 15 releasing the greenhouse film 1, the interaction force between the film roll shaft 15 and the arch tube 5 is not enough for the one-way bearing 26 to overcome the friction between itself and the friction member 23 and rotate synchronously with the connecting shaft 1501. In this case, the traction member 16 drives the film roll. During the downward movement of shaft 15 along arch tube 5, the film-rolling shaft 15 does not rotate, but first pulls the greenhouse film 1. When the greenhouse film 1 is taut, the pulling force of the greenhouse film 1 on the film-rolling shaft 15 enables the one-way bearing 26 to overcome the friction between itself and the friction element 23 and rotate synchronously with the connecting shaft 1501. During the downward movement of the film-rolling shaft 15 along arch tube 5, the greenhouse film 1 can be gradually released. In this way, the released greenhouse film 1 can be laid on the outside of arch tube 5 in a taut state, thereby avoiding wrinkles on the unfolded greenhouse film 1. This helps to avoid damage to the greenhouse film 1 at the wrinkles during the later pressing of the greenhouse film 1 by the pressing belt 2.

[0032] In summary, this device facilitates the winding and unwinding of the greenhouse film 1. Even if the film roll 15 slips during the winding process, causing the rolled film 1 to become too loose, the greenhouse film 1 can remain taut and laid on the outside of the arch pipe 5 during the unwinding process. Since wrinkles are avoided, the film pressing belt 2 will not damage the greenhouse film 1 when it is pressed tightly against the outside of the greenhouse film 1, thus helping to protect the greenhouse film 1.

[0033] Combination Figures 1-3 , Figure 11 As shown, an inner support tube 12 and an outer support tube 13 are provided at the traction member 16, and the two sides of the traction member 16 rest on the inner support tube 12 and the outer support tube 13 respectively, so that the traction member 16 can rotate stably. Figure 11 As can be seen, two sets of limiting parts 27 are fixed on the square frame 18. The limiting parts 27 are arc-shaped and can fit against both sides of the inner support tube 12 to restrict the square frame 18 in the diameter direction of the arch tube 5, so that the square frame 18 can only move along the circumference of the arch tube 5. It should be noted that the two ends of the inner support tube 12 are fixed to the wall 7, while the outer support tube 13 is fixedly connected to the inner support tube 12 by a fastener 19.

[0034] The traction component 16 can be a belt or a chain, and each end of the traction component 16 is provided with a transmission roller, which meshes with the traction component 16 to stably drive the traction component 16 to rotate. A rotating shaft 11 is provided between the two sets of transmission rollers located at the front and rear ends of the frame. The transmission rollers are fixed on the rotating shaft 11, and the rotating shaft 11 is connected to the output shaft of the external first motor through a first transmission component 8. The pressure film belt tube 14 can be fixed to the wall 7, and both ends of the pressure film belt tightening tube 9 are provided with a base. The base is fixed to the wall 7, and the pressure film belt tightening tube 9 is rotatably engaged with the base. Furthermore, the pressure film belt tightening tube 9 is connected to the output shaft of the external second motor through a second transmission component 10. It should be noted that the first transmission component 8 and the second transmission component 10 can both be belts, chains, or gear sets. In actual use, rain sensors and temperature sensors can be installed at the greenhouse. The detection units are connected to the first motor and the second motor respectively through a controller (such as a PLC or a microcontroller). When the temperature is low or it is raining, the first motor can drive the traction component 16 to rotate to complete the laying of the greenhouse film 1. The second motor tightens the film pressing belt 2 to prevent the greenhouse film 1 from being blown up by strong winds. Conversely, when the temperature is high, the film pressing belt 2 is loosened and the greenhouse film 1 is rolled up by the film rolling shaft 15.

[0035] Combination Figure 6 As shown, a guide shaft 22 is fixed inside the square frame 18 along the diameter direction of the arch tube 5. The guide shaft 22 passes through the slider 17 and slides with it. An elastic element 21 is sleeved on the outside of the guide shaft 22. The elastic element 21 can be, for example, a spring. The elastic element 21 is arranged between the slider 17 and the end of the square frame 18. When the film roll 15 is squeezed outward by the arch tube 5, the slider 17 can compress the spring.

[0036] The clamp 20 includes a main pressure plate 2001 and a secondary pressure plate 2002. The main pressure plate 2001 is fixedly connected to the square frame 18, while the secondary pressure plate 2002 can be fixed to the main pressure plate 2001 by fasteners such as screws or bolts, which is beneficial for clamping the traction member 16.

[0037] Combination Figure 7 As shown, a ring 25 can be fixedly fitted on the outer ring of the one-way bearing 26. The ring 25 can be a plastic part or a rubber ring, which helps to increase the friction between the one-way bearing 26 and the friction element 23.

[0038] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this application.

Claims

1. A fully automatic, multi-functional plastic greenhouse with an opening and closing mechanism, characterized in that: include: A greenhouse film (1) is laid on the outside of the arch pipe (5), and a film-pressing strip (2) that can be tightened or loosened is provided on the outside of the greenhouse film (1). The film roller (15) is located between the film pressing belt (2) and the arch pipe (5), and the two ends of the greenhouse film (1) are respectively fixed to the two sets of film rollers (15); A square frame (18) is set at both ends of the film rolling shaft (15). The film rolling shaft (15) is elastically connected to the square frame (18) along the diameter direction of the arch tube (5). Through the pressure between the film rolling shaft (15) and the arch tube (5), when the film rolling shaft (15) moves along the outer circle of the arch tube (5), the film rolling shaft (15) can rotate along its own axis to realize the winding or unfolding of the greenhouse film (1). An anti-rotation component is provided between the film roll shaft (15) and the square frame (18). During the process of the film roll shaft (15) moving downward along the arch tube (5) to unfold the greenhouse film (1), the tension of the taut greenhouse film (1) on the film roll shaft (15) enables the film roll shaft (15) to overcome the force of the anti-rotation component and rotate relative to the square frame (18) to unfold the greenhouse film (1).

2. The fully automatic multi-functional plastic greenhouse with opening and closing mechanism according to claim 1, characterized in that: The two ends of the pressure film belt (2) are respectively connected to the pressure film belt tube (14) and the pressure film belt tightening tube (9). The pressure film belt (2) can be tightened or loosened by rotating the pressure film belt tightening tube (9) in different directions.

3. The fully automatic multi-functional plastic greenhouse with opening and closing mechanism according to claim 1, characterized in that: Both ends of the film roll (15) are provided with square frames (18), and a slider (17) is elastically connected inside the square frame (18) along the diameter direction of the arch tube (5). A connecting shaft (1501) is fixed at the end of the film roll (15), and the connecting shaft (1501) is rotatably engaged with the slider (17) through a one-way bearing (26).

4. The fully automatic multi-functional plastic greenhouse with opening and closing mechanism according to claim 3, characterized in that: A friction element (23) is provided at the slider (17), the friction element (23) is in contact with the outer ring of the one-way bearing (26), an adjusting bolt (24) is provided at the slider (17), the adjusting bolt (24) is threadedly connected to the slider (17), and the bottom end of the adjusting bolt (24) is rotatably connected to the friction element (23).

5. The fully automatic multi-functional plastic greenhouse with opening and closing mechanism according to claim 1, characterized in that: Traction components (16) are provided at both the front and rear ends of the greenhouse. The traction components (16) are configured to drive the film rolling shaft (15) to move back and forth along the circumference of the arch tube (5) so as to realize the unfolding or rolling of the greenhouse film (1).

6. The fully automatic multi-functional plastic greenhouse with opening and closing mechanism according to claim 5, characterized in that: The traction component (16) is configured as a closed ring structure along the circumference of the arch tube (5). The square frame (18) is provided with a clamp (20) that cooperates with the traction component (16). The clamps (20) at the two sets of square frames (18) are fixedly connected to different sides of the traction component (16).

7. The fully automatic multi-functional plastic greenhouse with opening and closing mechanism according to claim 1, characterized in that: An insect-proof net (3) is provided between the frame and the greenhouse film (1).

8. The fully automatic multi-functional plastic greenhouse with opening and closing mechanism according to claim 5, characterized in that: The traction component (16) is provided with an inner support tube (12) and an outer support tube (13), with the two sides of the traction component (16) resting on the inner support tube (12) and the outer support tube (13) respectively.

9. A fully automatic, multi-functional plastic greenhouse with opening and closing mechanism according to claim 8, characterized in that: Two sets of limiting parts (27) are fixed on the square frame (18). The limiting parts (27) are arc-shaped and can fit on both sides of the inner support tube (12) to limit the square frame (18) in the diameter direction of the arch tube (5).

10. The fully automatic multi-functional plastic greenhouse with opening and closing mechanism according to claim 1, characterized in that: A film-clamping groove is provided at the highest point of the arch pipe (5), and the part of the greenhouse film (1) located between the two film roll shafts (15) is fixed at the film-clamping groove.

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