Greenhouse bottom ventilation opening opening and closing device convenient to buffer

Abstract

The utility model discloses a greenhouse bottom vent opening and closing device convenient to buffer, which relates to the technical field of agricultural engineering and comprises a wall body, a greenhouse frame, a buffer mechanism and an adjusting mechanism, the shed frame is fixedly arranged at the top of the wall body, and a cross rod is fixedly arranged at the top end of the wall body A wind-resistant buffer mechanism is fixedly arranged on the inner wall of the wall body, and an adjusting mechanism used for manually adjusting opening and closing is installed at the bottom of the transverse rod. Through linkage of the clockwork spring and the wind-up roller, automatic wind-up and tension stabilization of the buffer film are achieved, wind impact is reduced, and the film body is prevented from being damaged. The fixing support and the clamp spring simplify operation, the buffer film directionally guides air to the position above crops, the risk of cold air direct irrigation is reduced, and humiture sudden change and cold damage are reduced.

Description

Technical Field

[0001] This utility model relates to the field of agricultural engineering technology, specifically a device for opening and closing ventilation openings at the bottom of greenhouses that facilitates buffering. Background Technology

[0002] The bottom vents in plastic greenhouses are typically 50cm above the ground and are an important device for dehumidification, cooling, and ventilation. However, due to their low position, cold air can easily penetrate the greenhouse during early spring and winter, causing vegetables to suffer from dry edges, chilling injury, and other physiological diseases, reducing yield and affecting quality. This is detrimental to high-quality and efficient plastic greenhouse crop cultivation. Furthermore, the buffer film of the bottom vents is inconvenient to open and close manually, especially during cold weather when frequent operation is required. It is difficult to adjust the opening status in a timely manner according to changes in external wind and temperature, leading to direct cold air intrusion or delayed adjustment, further exacerbating sudden changes in temperature and humidity inside the greenhouse and increasing the probability of chilling injury and physiological diseases in vegetables.

[0003] Based on this, a convenient buffer opening and closing device for the bottom ventilation opening of a greenhouse is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0004] The purpose of this invention is to provide a device for opening and closing the bottom ventilation opening of a greenhouse that facilitates buffering, in order to solve the problem in the prior art where it is inconvenient to adjust the opening and closing of the buffer membrane of the bottom ventilation opening.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for opening and closing ventilation openings at the bottom of a greenhouse that facilitates buffering includes: a wall, a frame, a buffer mechanism, and an adjustment mechanism; the frame is fixedly installed at the top of the wall, and a crossbar is fixedly installed at the top of the wall. A wind-resistant buffer mechanism is fixedly installed on the inner wall of the wall, and an adjustment mechanism for manually adjusting the opening and closing is installed at the bottom of the crossbar.

[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0008] In one alternative embodiment: the buffer mechanism includes a storage cylinder fixedly disposed on the inner wall of the wall, a winding roller rotatably disposed on the inner wall of the storage cylinder, a spring fixedly disposed on the inner wall of the storage cylinder, the two ends of the winding roller being fixedly connected to the center of the spring, a buffer film being fixedly wound on the circumferential surface of the winding roller, a mounting bracket being fixedly disposed at the top of the buffer film, a sliding ring being fixedly disposed at the front end of the mounting bracket, and the sliding ring being slidably connected to the frame.

[0009] In one alternative: a fixing component for quickly fixing the buffer membrane is fixed on the scaffold.

[0010] In one alternative: the fixing component includes a fixing bracket fixed to the shelf, and the inner wall of the fixing bracket is covered with a retaining spring.

[0011] In one alternative embodiment: the adjustment mechanism includes an adjustment bracket mounted on the bottom of the ratchet, the ratchet being rotatably mounted on the inner wall of the adjustment bracket, a fixing groove being formed on the circumferential surface of the ratchet, a rotating bracket being rotatably mounted on the inner wall of the adjustment bracket, a lever being fixedly mounted on the rotating bracket, a torsion spring being mounted on the rotating end of the lever, a fixing ring being fixedly mounted on the top of the mounting bracket, and a pull rope being fixedly mounted on the fixing ring.

[0012] In one alternative: the top of the fixed bracket has a sliding groove adapted to the buffer membrane, through which the buffer membrane passes, and the front end of the fixed bracket has an installation groove adapted to the snap ring.

[0013] In one alternative: the right end of the lever is provided with a limiting plate adapted to the ratchet.

[0014] In one alternative: the inner wall of the adjusting bracket has a through hole that matches the adjusting bracket, the pull rope enters and exits through the through hole, the middle of the pull rope is fixedly connected to the fixing slot, and is wound around the fixing slot.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model achieves automatic winding and stable tension of the buffer film by linking a spring-loaded mechanism with a winding roller, reducing wind impact and preventing film damage. The fixed bracket and retaining spring simplify operation, and the buffer film directs the wind upwards to the crop, reducing the risk of direct cold air intrusion and mitigating sudden temperature and humidity changes and chilling injury.

[0017] 2. This utility model precisely adjusts the height of the buffer membrane by using a pull rope to fix the slot, ensuring stable opening. A lever combined with a torsion spring enables one-handed unlocking and reset, making operation convenient. The pull rope transmission structure enhances reliability and extends lifespan, making it suitable for low-temperature, frequent adjustment scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the buffer membrane in this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the storage tube in this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the fixed bracket in this utility model.

[0022] Figure 5 This is a schematic diagram of the adjustment mechanism in this utility model.

[0023] Attached diagram labels: 1. Wall; 2. Shelf; 3. Crossbar; 4. Storage cylinder; 5. Winding roller; 6. Spring; 7. Buffer membrane; 8. Mounting bracket; 9. Sliding ring; 10. Fixed bracket; 11. Snap ring; 12. Adjusting bracket; 13. Ratchet; 14. Fixed slot; 15. Rotating bracket; 16. Lever; 17. Torsion spring; 18. Fixed ring; 19. Pull rope. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] In one embodiment, such as Figures 1-5 As shown, a device for opening and closing a bottom ventilation opening of a greenhouse with easy buffering includes a wall 1, a frame 2, a buffering mechanism, and an adjustment mechanism; the frame 2 is fixedly installed on the top of the wall 1, and a crossbar 3 is fixedly installed at the top of the wall 1. A wind-resistant buffering mechanism is fixedly installed on the inner wall of the wall 1, and an adjustment mechanism for manually adjusting the opening and closing is installed at the bottom of the crossbar 3.

[0026] The wall 1 is the same length as the plastic greenhouse, and the front end of the frame 2 is covered with PE film.

[0027] In one embodiment, such as Figures 2-4 As shown, the buffer mechanism includes a storage cylinder 4 fixedly installed on the inner wall of the wall 1. A winding roller 5 is rotatably installed on the inner wall of the storage cylinder 4. A spring 6 is fixedly installed on the inner wall of the storage cylinder 4. The two ends of the winding roller 5 are fixedly connected to the center of the spring 6. A buffer film 7 is fixedly wound on the circumferential surface of the winding roller 5. A mounting bracket 8 is fixedly installed at the top of the buffer film 7. A sliding ring 9 is fixedly installed at the front end of the mounting bracket 8. The sliding ring 9 is slidably connected to the frame 2. A fixing component for quickly fixing the buffer film 7 is fixedly installed on the frame 2.

[0028] The fixing components include a fixing bracket 10 fixedly mounted on the frame 2, with a retaining spring 11 laid on the inner wall of the fixing bracket 10. The top of the fixing bracket 10 has a sliding groove adapted to the buffer film 7, through which the buffer film 7 passes. The front end of the fixing bracket 10 has an installation groove adapted to the retaining spring 11. The buffer film 7 is the same length as the plastic greenhouse and 1.2m~1.5m wide. The width of the buffer film 7 is slightly larger than the height of the vent. The buffer film 7 is a 0.10mm thick, aging-resistant, drip-resistant film that meets industry standards. The lower end of the buffer film 7 is 10cm away from the bottom vent and is fixed to the frame 2 of the plastic greenhouse using a film pressing groove. The upper end is 20cm higher than the top of the vent and 20cm horizontally away from the arch rod. It is fixed to the frame 2 of the plastic greenhouse with wire. In early spring or winter, when ventilating and dehumidifying, the cold air is directed above the growing point of the crops in the greenhouse.

[0029] By setting the sliding ring 9, the buffer film 7 can be slidably adjusted on the frame 2. After adjusting to a suitable height, the snap ring 11 can be installed in the fixed bracket 10, thereby pressing and fixing the buffer film 7 that passes through the fixed bracket 10. When the fixing is loosened, the spring 6 drives the winding roller 5 to rotate and reset, thereby rewinding the buffer film 7.

[0030] In one embodiment, such as Figure 5 As shown, the adjustment mechanism includes an adjustment bracket 12 installed at the bottom of the ratchet 13. The ratchet 13 is rotatably mounted on the inner wall of the adjustment bracket 12. A fixing groove 14 is opened on the circumferential surface of the ratchet 13. A rotating bracket 15 is rotatably mounted on the inner wall of the adjustment bracket 12. A lever 16 is fixedly mounted on the rotating bracket 15. A torsion spring 17 is installed at the rotating end of the lever 16. A fixing ring 18 is fixedly mounted on the top of the mounting bracket 8. A pull rope 19 is fixedly mounted on the fixing ring 18.

[0031] The right end of the lever 16 is provided with a limiting plate that is compatible with the ratchet 13. The inner wall of the adjusting bracket 12 is provided with a through hole that is compatible with the adjusting bracket 12. The pull rope 19 enters and exits through the through hole. The middle of the pull rope 19 is fixedly connected to the fixed slot 14 and wrapped around the fixed slot 14.

[0032] The buffer membrane 7 is raised by pulling the pull rope 19, which moves the mounting bracket 8 fixed at the other end upward. Since the middle of the pull rope 19 is fixedly connected to the fixed slot 14 and wrapped around the fixed slot 14, pulling the pull rope 19 will drive the ratchet 13 to rotate. The lever 16, under the setting of the torsion spring 17, will drive the limiting plate to approach the ratchet 13, so that the ratchet 13 will rotate in one direction. If the ratchet 13 rotates in the opposite direction, the lever 16 will lock the ratchet 13, so that the operator can stop the buffer membrane 7 when releasing it, thus fixing it in the required position. When the lever 16 is manually moved, the ratchet 13 is unlocked, so that the buffer membrane 7 is reset under the action of the spring 6 and gravity. By setting the buffer membrane 7, this device can prevent the invasion of cold air and reduce dry edges, cold damage and other physiological diseases.

[0033] The above embodiment discloses a device for opening and closing a greenhouse bottom ventilation opening that facilitates buffering. The buffer film 7 is automatically rolled up and fixed via a winding roller 5 and a spring 6 within a storage cylinder 4. When the ventilation opening needs to be opened, the buffer film 7 slides and unfolds along the greenhouse frame 2 via a sliding ring 9. The spring 6 stores force due to the rotation of the winding roller 5, providing reverse tension to the buffer film 7 and preventing it from shaking violently due to wind. After unfolding, the buffer film 7 is pressed and fixed by a retaining spring 11 within a fixing bracket 10, forming a windbreak barrier that directs cold air above the crop growth point, reducing chilling damage. When closing, the retaining spring 11 is released, and the spring 6 drives the winding roller 5 to rotate, automatically retracting the buffer film 7 into the storage cylinder 4.

[0034] The precise positioning of the buffer membrane 7 is achieved through the linkage of ratchet 13 and pull rope 19. When the pull rope 19 is pulled, it winds around the fixing groove 14 of ratchet 13, causing ratchet 13 to rotate in one direction, raising the buffer membrane 7 to the required height via the mounting bracket 8; the limiting plate of ratchet 13 is locked by torsion spring 17, maintaining its fixed position. When closing is required, the lever 16 is moved to release the ratchet 13 from locking, and the restoring force of the spring 6 and the gravity of the buffer membrane 7 work together to quickly reset the buffer membrane 7, completing the closure of the vent.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for opening and closing a bottom ventilation opening of a greenhouse that facilitates buffering, comprising a wall (1), a frame (2), a buffering mechanism and an adjusting mechanism; the frame (2) is fixedly installed on the top of the wall (1), and a crossbar (3) is fixedly installed on the top of the wall (1). Its features are: The inner wall of the wall (1) is fixedly provided with a wind-resistant buffer mechanism, and the bottom of the crossbar (3) is equipped with an adjustment mechanism for manual adjustment of opening and closing.

2. The greenhouse bottom ventilation opening and closing device for easy buffering as described in claim 1, characterized in that, The buffer mechanism includes a storage cylinder (4) fixedly installed on the inner wall of the wall (1). A winding roller (5) is rotatably installed on the inner wall of the storage cylinder (4). A spring spring (6) is fixedly installed on the inner wall of the storage cylinder (4). The two ends of the winding roller (5) are fixedly connected to the center of the spring spring (6). A buffer film (7) is fixedly wound on the circumferential surface of the winding roller (5). An installation bracket (8) is fixedly installed at the top of the buffer film (7). A sliding ring (9) is fixedly installed at the front end of the installation bracket (8). The sliding ring (9) is slidably connected to the frame (2).

3. The greenhouse bottom ventilation opening and closing device for easy buffering as described in claim 2, characterized in that, The frame (2) is fixed with a fixing component for quickly fixing the buffer film (7).

4. The greenhouse bottom ventilation opening and closing device for easy buffering as described in claim 3, characterized in that, The fixing component includes a fixing bracket (10) fixedly mounted on the frame (2), and the inner wall of the fixing bracket (10) is covered with a retaining spring (11).

5. The greenhouse bottom ventilation opening and closing device for easy buffering as described in claim 2, characterized in that, The adjustment mechanism includes an adjustment bracket (12) installed at the bottom of the ratchet (13). A fixing groove (14) is provided on the circumferential surface of the ratchet (13). A rotating bracket (15) is rotatably provided on the inner wall of the adjustment bracket (12). A lever (16) is fixedly provided on the rotating bracket (15). A torsion spring (17) is installed on the rotating end of the lever (16). A fixing ring (18) is fixedly provided on the top of the mounting bracket (8). A pull rope (19) is fixedly provided on the fixing ring (18).

6. The greenhouse bottom ventilation opening and closing device for easy buffering as described in claim 4, characterized in that, The top of the fixed bracket (10) is provided with a sliding groove that is compatible with the buffer membrane (7), and the buffer membrane (7) passes through the sliding groove. The front end of the fixed bracket (10) is provided with an installation groove that is compatible with the snap ring (11).

7. The greenhouse bottom ventilation opening and closing device for easy buffering as described in claim 5, characterized in that, The right end of the lever (16) is provided with a limiting plate that is compatible with the ratchet (13).

8. The greenhouse bottom ventilation opening and closing device for easy buffering as described in claim 5, characterized in that, The inner wall of the adjusting bracket (12) is provided with a through hole that is compatible with the adjusting bracket (12). The pull rope (19) enters and exits through the through hole. The middle of the pull rope (19) is fixedly connected to the fixed slot (14) and wrapped around the fixed slot (14).

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