A multi-span greenhouse raisable anti-lodging device for fruit cane

Abstract

The utility model discloses a kind of continuous ridge big shed liftable sugar cane anti-lodging devices, belong to the technical field of agricultural facilities, it includes: anti-lodging net, by multiple longitudinal and transverse rope interlaced setting and become, for supporting sugar cane;Guiding support mechanism, including setting in the vertical support component on the outermost of continuous ridge big shed lifting guide rail and a pair of one-to-one cooperation on lifting guide rail sliding ring, the edge of anti-lodging net is supported by the sliding ring;Lifting mechanism, including several horizontally arranged telescopic pole, for driving several telescopic pole synchronous rotation drive unit and multiple traction ropes, the upper end of the traction rope is wound on telescopic pole, lower end is connected with anti-lodging net, the retraction of traction rope can drive anti-lodging net through sliding ring along lifting guide rail lifting.The utility model passes through electric lifting mechanism and guiding support mechanism, realize the automation, synchronous lifting of entire anti-lodging net, greatly improve operation efficiency, save manpower, and guarantee net surface flat.

Description

Technical Field

[0001] This utility model relates to the field of agricultural facilities technology, and in particular to a liftable anti-lodging device for planting tall crops such as sugarcane in multi-span greenhouses. Background Technology

[0002] Sugarcane, with its stalks rich in sugar and water and its sweet taste, is highly favored by consumers and has significant economic value. However, sugarcane plants are generally tall and their stalks are relatively fragile, making them highly susceptible to large-scale lodging in the later stages of growth, especially during typhoons or strong winds. Lodging not only severely affects the normal growth and nutrient transport of sugarcane, leading to reduced yield and lower quality, but also creates significant difficulties for subsequent field management and harvesting.

[0003] To address the aforementioned problems, several anti-lodging devices have emerged in the prior art. For example, Chinese utility model patent CN211607559U discloses a sugarcane anti-lodging device. This device mainly includes multiple independent support columns, a mesh frame mounted on the support columns, and a horizontal and vertical mesh composed of horizontal and vertical ropes. Its height is adjusted by an adjustment device installed on each support column. This adjustment device specifically consists of a fixed pulley at the top of the support column, a pull rope wound around the fixed pulley, and a fixing block with multiple short horizontal rods fixed to the side of the support column. One end of the pull rope is fixed to the mesh frame. By manually pulling the pull rope and fixing the buckle at the end of the rope to the short horizontal rods at different heights, the height of the mesh frame can be adjusted to adapt to the different growth stages of the sugarcane.

[0004] However, the aforementioned existing technologies have the following significant shortcomings when applied to modern, large-scale multi-span greenhouses: 1. Low level of automation and high labor and time costs. The height adjustment of this device is entirely manual, requiring operators to go to each support column one by one. For multi-span greenhouses that cover thousands or even tens of thousands of square meters, the number of internal columns is enormous. Using this "single-point" manual adjustment method undoubtedly requires a large amount of labor and consumes a very long working time, resulting in extremely low operating efficiency and making it unsuitable for the large-scale and intensive production requirements of modern agriculture.

[0005] 2. Difficulty in achieving synchronized raising and lowering, resulting in poor flatness of the mesh surface. Because each adjustment device operates independently, it is extremely difficult to ensure that the mesh frames at all support points are raised and lowered to the same precise height during adjustment. This leads to unevenness across the entire mesh, affecting not only the support effect but also potentially damaging the sugarcane plants due to uneven local stress. Achieving flatness across the entire mesh surface requires repeated measurements and adjustments, further increasing the complexity and time cost of the operation.

[0006] Therefore, overcoming the series of shortcomings of traditional anti-tipping devices, such as cumbersome operation, low efficiency, and difficulty in guaranteeing support effect, is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a lifting and lowering anti-lodging device for sugarcane in multi-span greenhouses. It is not only highly automated and easy to operate, but also can achieve synchronous lifting and lowering, and can be perfectly adapted to the structure of multi-span greenhouses.

[0008] The technical solution of this utility model is: A height-adjustable sugarcane anti-lodging device for multi-span greenhouses is installed inside the multi-span greenhouses. The direction parallel to the longitudinal beams of the multi-span greenhouse is defined as longitudinal, and the direction perpendicular to the longitudinal direction is defined as transverse. The multi-span greenhouse includes multiple vertical support components, each including columns and doorposts. The device is characterized in that it comprises: Anti-lodging netting consists of multiple longitudinal and transverse ropes interwoven to support the sugarcane. The guiding support mechanism includes a lifting guide rail set on the vertical support member of the outermost part of the multi-span greenhouse and a slip ring that matches the lifting guide rail one-to-one. The edge of the anti-falling net is supported by the slip ring. The lifting mechanism includes a drive unit, several horizontally arranged retractable rods, and multiple traction ropes. The retractable rods are rotatably supported above the greenhouse. The drive unit is used to drive the several retractable rods to rotate synchronously. The upper end of the traction rope is wound around the retractable rod, and the lower end is connected to the anti-tipping net. The drive unit synchronously drives the plurality of retracting rods to rotate in both directions, thereby synchronously winding and unwinding the traction rope, which in turn drives the anti-falling net to rise and fall along the lifting guide rail via slip rings to adjust the height of the anti-falling net.

[0009] By setting up an electric lifting mechanism and a guide support mechanism, the entire anti-collapse netting is automatically, synchronously, and smoothly raised and lowered. Compared with the existing technology of manual adjustment point by point, this greatly improves work efficiency, saves labor and time costs, and ensures the overall flatness of the netting surface.

[0010] As an optimization, in the aforementioned adjustable sugarcane anti-lodging device for multi-span greenhouses, the anti-lodging net includes: a main load-bearing frame, composed of multiple load-bearing ropes arranged longitudinally and laterally, with the edges of the main load-bearing frame connected to the slip ring; and a fine protective mesh, composed of multiple protective ropes connected longitudinally and laterally to the main load-bearing frame. By setting up the main load-bearing frame and the fine protective mesh, the structure is clearly layered, ensuring both the strength and stability of the overall frame and providing effective, fine support for the sugarcane, making the overall structure more scientific and reliable.

[0011] As an optimization, in the aforementioned adjustable sugarcane anti-lodging device for multi-span greenhouses, the main load-bearing frame is composed of multiple longitudinal load-bearing ropes arranged along each column of longitudinal columns and multiple transverse load-bearing ropes arranged along each column of transverse columns, interwoven with each longitudinal load-bearing rope. Both ends of each longitudinal load-bearing rope are connected to a slip ring on the longitudinal column in its respective column, and both ends of each transverse load-bearing rope are connected to a slip ring on the transverse column in its respective column. This arrangement utilizes each column of the multi-span greenhouse to provide lateral restraint for the load-bearing ropes. When encountering strong winds, further deviation of the load-bearing ropes is blocked by the columns, effectively suppressing the swaying and deformation of the anti-lodging netting and significantly improving the device's wind resistance and anti-lodging capability.

[0012] As an optimization, in the aforementioned liftable sugarcane anti-lodging device for multi-span greenhouses, the load-bearing ropes forming the outermost four sides of the main load-bearing frame are evenly distributed on the inner side of the outermost columns of the multi-span greenhouse; the load-bearing ropes forming the internal grid of the main load-bearing frame are arranged alternately: the longitudinal load-bearing ropes corresponding to two adjacent longitudinal columns are respectively set on the opposite sides of the two longitudinal columns; the transverse load-bearing ropes corresponding to two adjacent transverse columns are respectively set on the opposite sides of the two transverse columns. Through the alternating arrangement of the load-bearing ropes, a stable omnidirectional anti-displacement structure is formed, which can effectively resist strong winds in any direction and prevent large-scale lateral displacement of the anti-lodging net, thereby providing omnidirectional anti-lodging support for the sugarcane.

[0013] As an optimization, in the aforementioned adjustable anti-lodging device for sugarcane in multi-span greenhouses, both ends of the longitudinal and transverse load-bearing ropes are tensioned and connected to their respective slip rings via tensioners. By setting tensioners, the tension of each load-bearing rope can be adjusted to ensure that the entire anti-lodging net is flat and taut, providing reliable support for the sugarcane.

[0014] As an optimization, in the aforementioned adjustable sugarcane anti-lodging device for multi-span greenhouses, the outermost load-bearing rope of the main load-bearing frame is connected to a slip ring of the vertical support member in its column at least at a midpoint along its length. By setting an intermediate connection point, effective intermediate support is provided for the outermost load-bearing rope, effectively preventing the sagging and deformation of long-span ropes and enhancing the structural stability and reliability of the entire anti-lodging net.

[0015] As an optimization, in the aforementioned adjustable sugarcane anti-lodging device for multi-span greenhouses, the intersections of the longitudinal and transverse ropes of the anti-lodging net are all movably connected by a connector. By setting movable connectors at the rope intersections, it effectively prevents the mesh from becoming disordered or deformed, ensuring the integrity of the structure; furthermore, it allows operators to flexibly adjust the size of the fine protective mesh by sliding the protective ropes along the load-bearing ropes as needed.

[0016] As an optimization, in the aforementioned adjustable sugarcane anti-lodging device for multi-span greenhouses, the intersections of the longitudinal and transverse load-bearing ropes are all connected by a metal buckle. The metal buckle houses and restrains the two load-bearing ropes within it, while simultaneously separating them from the corresponding uprights at the intersection. By using metal buckles, the load-bearing ropes at the intersections are cleverly separated from the uprights, thereby greatly reducing friction during lifting and lowering, ensuring the smoothness of the anti-lodging net during the lifting process, and preventing jamming.

[0017] As an optimization, in the aforementioned lifting and lowering anti-lodging device for sugarcane in a multi-span greenhouse, a retractable rod is installed below each longitudinal beam of the multi-span greenhouse, with the retractable rod parallel to the longitudinal beam. The drive unit includes multiple drive motors independently configured for each retractable rod, and a synchronization controller for controlling the synchronous rotation of the multiple drive motors. By independently configuring a motor for each retractable rod and using a synchronization controller, high control precision and fast response are achieved.

[0018] As an optimization, in the aforementioned adjustable sugarcane anti-lodging device for multi-span greenhouses, the drive motor is a limit motor, which restricts the highest and lowest positions of the anti-lodging net. Using a limit motor effectively prevents equipment damage due to misoperation, improving the automation level and operational safety of the entire device.

[0019] The beneficial effects of this utility model are: 1. The motor-driven lifting mechanism combined with the guide support mechanism realizes the automated and synchronous lifting of the anti-lodging net, replacing the traditional cumbersome and inefficient point-by-point manual adjustment method. This not only greatly improves the work efficiency and saves manpower and time costs, but also ensures the overall flatness of the net surface. Moreover, the device can be perfectly adapted to the inherent structure of multi-span greenhouses, and has strong versatility and practicality, providing an efficient and convenient management method for modern and large-scale agricultural production. 2. By using the greenhouse pillars as lateral supports, adopting an alternating layout, and incorporating a series of interconnected designs such as tensioners and additional intermediate support points, the entire anti-lodging netting forms a stable structure and has all-directional anti-deviation capability. It can effectively resist strong winds from any direction and ensures that the netting surface is taut and does not sag, thus providing strong anti-lodging support for the sugarcane. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the anti-tipping device arranged in a multi-span greenhouse according to an embodiment of the present invention.

[0021] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model.

[0022] Figure 3 for Figure 2 Enlarged view of point P.

[0023] Figure 4 This is a top view of the anti-falling netting arrangement in an embodiment of this utility model.

[0024] Figure 5 This is a schematic diagram of the intermediate support structure of the outer load-bearing rope in an embodiment of this utility model.

[0025] Figure 6 This is a schematic diagram of the connection structure at the rope intersection in an embodiment of this utility model.

[0026] Figure 7 This is a schematic diagram of the connection structure at the intersection of the load-bearing ropes in an embodiment of this utility model.

[0027] In the diagram: 1. Longitudinal beam; 2. Vertical support component; 21. Column; 22. Gatepost; 3. Anti-fall net; 3a. Main load-bearing frame; 3b. Fine protective mesh; 31. Load-bearing rope; 311. Longitudinal load-bearing rope; 312. Lateral load-bearing rope; 32. Protective rope; 41. Lifting guide rail; 42. Slip ring; 421. Pulley; 422. Lifting ring; 51. Drive motor; 52. Retracting rod; 53. Traction rope; 6. Tensioner; 61. Frame body; 62. Tie rod; 7. Connector; 71. Wire tie ring; 72. Metal buckle. Detailed Implementation

[0028] The present invention will now be further described in conjunction with the accompanying drawings and embodiments: In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "horizontal", and "vertical" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this utility model, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] like Figure 1 As shown in the figure, this embodiment provides a liftable sugarcane anti-lodging device for multi-span greenhouses, which is installed inside the multi-span greenhouse. For ease of explanation and understanding, directions are first defined: the direction parallel to the longitudinal beams 1 of the multi-span greenhouse is defined as longitudinal, and the direction perpendicular to the longitudinal direction is defined as transverse. The multi-span greenhouse includes multiple vertical support members 2 as its main load-bearing structure. These vertical support members 2 include both columns 21 supported under each longitudinal beam and portal posts 22 at both ends of each span.

[0030] like Figure 2 As shown, this device includes an anti-lodging net 3, a guide support mechanism, and a lifting mechanism. The anti-lodging net 3 is composed of multiple longitudinal and transverse ropes interlaced to support the sugarcane. The guide support mechanism includes a lifting guide rail 41 mounted on the outermost vertical support member 2 of the multi-span greenhouse and slip rings 42 that are paired with the lifting guide rail. The edges of the anti-lodging net 3 are supported by these slip rings 42. The lifting mechanism includes a drive unit, several horizontally arranged retracting rods 52, and multiple traction ropes 53. The retracting rods 52 are rotatably mounted above the greenhouse. The drive unit drives the retracting rods 52 to rotate synchronously. The upper end of the traction rope 53 is wound around the retracting rod 52, and the lower end is connected to the anti-lodging net 3. By synchronously driving the retracting rods 52 to rotate in both directions, the drive unit achieves synchronous winding and unwinding of the traction ropes 53, thereby causing the anti-lodging net 3 to rise and fall along the lifting guide rail 41 via the slip rings 42, thus adjusting the height of the anti-lodging net 3.

[0031] Specifically, such as Figure 3 As shown, the slip ring 42 includes a pulley 421 and a hanging ring 422 fixed on the pulley. The pulley 421 is slidably fitted in the lifting guide rail 41 of the column 21 or the gate post 22, and the hanging ring 422 is responsible for connecting with the anti-falling net 3.

[0032] like Figure 4As shown, the anti-lodging net 3 is structurally divided into two layers: a main load-bearing frame 3a, which plays a primary role in load-bearing support, and a fine protective mesh 3b, which provides fine support. The main load-bearing frame 3a is composed of multiple high-strength load-bearing ropes 31 arranged in a crisscross pattern in the longitudinal and transverse directions. The edges of the main load-bearing frame 3a are connected to slip rings 42. The fine protective mesh 3b is composed of multiple protective ropes 32 connected to the main load-bearing frame 3a in a crisscross pattern in the longitudinal and transverse directions. In this embodiment, the load-bearing ropes 31 are preferably steel wire ropes to ensure sufficient tensile strength and durability; the protective ropes 32 are preferably nylon ropes or hemp ropes, which are softer and less likely to damage the sugarcane stalks.

[0033] like Figure 4 As shown, to enhance the wind resistance of the anti-falling net 3, the main load-bearing frame 3a is composed of multiple longitudinal load-bearing ropes 311 laid along each column of longitudinal columns 21 and multiple transverse load-bearing ropes 312 laid along each column of transverse columns 21. The two ends of each longitudinal load-bearing rope 311 are connected to the slip ring 42 of the longitudinal column 21 in its column, and the two ends of each transverse load-bearing rope 312 are connected to the slip ring of the transverse column 21 in its column. This arrangement utilizes each column 21 of the greenhouse as a lateral limiter. When encountering strong winds, the further deviation of the load-bearing ropes 31 will be blocked by the columns 21, thereby improving its wind resistance. Therefore, the size of each grid unit of the main load-bearing frame 3a is approximately equal to one span multiplied by one bay of a multi-span greenhouse. Meanwhile, the load-bearing ropes 31 that form the outermost four sides of the main load-bearing frame 3a are all arranged inside the outermost columns 21 of the multi-span greenhouse. The load-bearing ropes 31 that form the internal grid of the main load-bearing frame 3a are arranged in an alternating manner: the longitudinal load-bearing ropes 311 corresponding to two adjacent longitudinal columns 21 are respectively set on the opposite sides of the two longitudinal columns 21; the transverse load-bearing ropes 312 corresponding to two adjacent transverse columns 21 are respectively set on the opposite sides of the two transverse columns 21. This alternating arrangement forms a stable omnidirectional anti-displacement structure that can resist strong winds from any direction.

[0034] like Figure 2 and Figure 3As shown, to ensure the net surface is flat and taut, both ends of the longitudinal load-bearing rope 311 and the transverse load-bearing rope 312 are tensioned and connected to their respective slip rings 42 via tensioners 6. In this embodiment, the tensioner 6 is preferably a turnbuckle, which includes a frame body 61 with a hollow structure and two pull rods 62. The inner walls of both ends of the frame body 61 are respectively provided with internal threaded holes with opposite thread directions. The outer surfaces of the two pull rods 62 are respectively provided with external threads that mate with the internal threaded holes and are screwed into both ends of the frame body 61. Each pull rod 62 has a pull ring integrally formed at the end away from the frame body 61. One pull ring of the turnbuckle is connected to the load-bearing rope 31, and the other pull ring is connected to the slip ring 42. By rotating the frame body 61, the two pull rods 62 can be simultaneously tightened inward or loosened outward using the principle of reverse threads, thereby adjusting the tension of the load-bearing rope 31.

[0035] At the same time, such as Figure 5 As shown, to more effectively support the entire anti-falling net 3, additional intermediate support is provided for the outermost load-bearing rope 31 of the main load-bearing frame 3a. Specifically, at least one intermediate position along its length is connected to the slip ring 42 of the vertical support member 2 in its column. In this embodiment, the slip ring 42 on each post 21 and gatepost 22 in the column where the outermost load-bearing rope 31 is located is connected to the load-bearing rope 31, thereby providing stronger tensile force and improving the reliability of the entire anti-falling net 3. There are two ways to connect the intermediate position of the outermost load-bearing rope 31 to the slip ring 42, which can be flexibly selected according to actual needs: one is a direct connection, such as... Figure 5 As shown, one method involves directly passing the load-bearing rope 31 through the lifting ring of the slip ring 42; another method is the tensioner connection type (not shown in the figure), in which an additional tensioner 6 (such as a turnbuckle) is connected between the slip ring 42 and the load-bearing rope 31 at the middle position. A rope clamp can be fixed at a predetermined position on the load-bearing rope 31. One pull ring of the tensioner 6 is connected to the rope clamp, and the other pull ring is connected to the lifting ring of the slip ring 42. This method can achieve a stronger and adjustable tension force.

[0036] like Figure 6As shown, to further ensure the structural stability of the anti-lodging net 3 while maintaining flexibility, the intersections of the longitudinal and transverse ropes of the anti-lodging net 3 are all connected by a connector 7. This connector 7 can be a metal buckle, wire loop, nylon cable tie, or rope. Its structure is simple, requiring only the two intersecting ropes to be bound together. This movable connection effectively prevents the mesh from becoming disordered or deformed. Furthermore, it allows operators to manually slide the transverse protective rope along the longitudinal rope or the longitudinal protective rope along the transverse rope, according to actual needs. This allows for flexible adjustment of the size of the fine protective mesh 3b based on the density and support requirements of the sugarcane at different growth stages (such as seedling and jointing stages), achieving more scientific and efficient field management. In this embodiment, the connector 7 preferably uses a wire loop 71, which is simple to operate and low in cost; and specifically, as... Figure 7 As shown, at the intersection of the longitudinal load-bearing rope 311 and the transverse load-bearing rope 312, a ring-shaped metal buckle 72 is preferably used as the connector 7. Since the load-bearing ropes 31 are laid along the columns 21, each intersection of the longitudinal load-bearing rope 311 and the transverse load-bearing rope 312 corresponds exactly to the position of a column 21 inside the greenhouse. During the raising and lowering of the anti-tipping net 3, the load-bearing ropes 31 at these intersections may become taut and stuck on the side of the column 21, making it difficult to move up and down. The metal buckle 72 accommodates and restrains the two intersecting load-bearing ropes 31 inside it. At the same time, the outer wall of the metal buckle 72 itself acts as an isolation layer with a low coefficient of friction, separating the ropes from the side of the column 21, thereby greatly reducing the friction during raising and lowering and ensuring a smooth process. In this embodiment, the metal buckle 72 is preferably a U-shaped wire rope clamp.

[0037] like Figure 2 As shown, corresponding to each longitudinal load-bearing rope 311 of the main load-bearing frame 3a of the anti-falling net 3, a take-up / release rod 52 parallel to the longitudinal beam is set below each longitudinal beam 1 of the multi-span greenhouse. Multiple traction ropes 53 are evenly arranged between each longitudinal beam 1 and the corresponding longitudinal load-bearing rope 311 below. The upper end of the traction rope 53 is wound around the take-up / release rod 52, and the lower end is connected to the longitudinal load-bearing rope 311. The drive unit includes multiple drive motors 51 independently set for each take-up / release rod 52, and a synchronization controller for controlling the synchronous rotation of all drive motors 51. To ensure operational safety, the drive motor 51 is preferably a limit motor, which can automatically limit the highest and lowest positions of the anti-falling net 3 to prevent misoperation. In other embodiments, the drive unit may also have only one drive motor, and the power of the drive motor is transmitted to each take-up / release rod through a mechanical transmission mechanism, thereby realizing the synchronous rotation of all take-up / release rods.

[0038] The working process of the adjustable sugarcane anti-lodging device for multi-span greenhouses of this utility model is as follows: When the sugarcane is in its growth stage and the height of the anti-lodging net 3 needs to be adjusted, the operator starts the drive unit. The synchronous controller issues a command to drive all drive motors 51 to rotate synchronously at the same speed and direction. The drive motors 51 drive the retracting rods 52 to rotate synchronously, thereby achieving synchronous winding or unwinding of all traction ropes 53. Under the pull or release of the traction ropes 53 on the longitudinal load-bearing ropes 311, the entire anti-lodging net 3, as a whole, rises or falls synchronously and smoothly along the lifting guide rails 41 on each vertical support member 2 through the slip rings 42 on its edge, until it reaches the preset limit height or is stopped by the operator. The whole process is highly automated, requiring only one person to operate, and can ensure a flat net surface, providing optimal height support for sugarcane at different growth stages.

[0039] It is understood that those skilled in the art can make various other corresponding changes and modifications based on the technical concept of this utility model, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A height-adjustable anti-lodging device for sugarcane in a multi-span greenhouse, installed inside the multi-span greenhouse, defining the direction parallel to the longitudinal beams of the multi-span greenhouse as longitudinal, and the direction perpendicular to the longitudinal direction as transverse, wherein the multi-span greenhouse includes multiple vertical support members, the vertical support members including columns and doorposts, characterized in that: The adjustable sugarcane anti-lodging device for the multi-span greenhouse includes: Anti-lodging netting consists of multiple longitudinal and transverse ropes interwoven to support the sugarcane. The guiding support mechanism includes a lifting guide rail set on the vertical support member of the outermost part of the multi-span greenhouse and a slip ring that matches the lifting guide rail one-to-one. The edge of the anti-falling net is supported by the slip ring. The lifting mechanism includes a drive unit, several horizontally arranged retractable rods, and multiple traction ropes. The retractable rods are rotatably supported above the greenhouse. The drive unit is used to drive the several retractable rods to rotate synchronously. The upper end of the traction rope is wound around the retractable rod, and the lower end is connected to the anti-tipping net. The drive unit synchronously drives the plurality of retracting rods to rotate in both directions, thereby synchronously winding and unwinding the traction rope, which in turn drives the anti-falling net to rise and fall along the lifting guide rail via slip rings to adjust the height of the anti-falling net.

2. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 1, characterized in that: The anti-falling net includes: a main load-bearing frame, which is formed by multiple load-bearing ropes arranged in a crisscross pattern in the longitudinal and transverse directions, and the edge of the main load-bearing frame is connected to the slip ring; and a fine protective mesh, which is formed by multiple protective ropes connected to the main load-bearing frame in a crisscross pattern in the longitudinal and transverse directions.

3. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 2, characterized in that: The main load-bearing frame is composed of multiple longitudinal load-bearing ropes laid along each column of longitudinal columns and multiple transverse load-bearing ropes laid along each column of transverse columns, which are interwoven. Both ends of each longitudinal load-bearing rope are connected to the slip ring of the longitudinal column in which it is located, and both ends of each transverse load-bearing rope are connected to the slip ring of the transverse column in which it is located.

4. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 3, characterized in that: The load-bearing ropes that form the outermost four sides of the main load-bearing frame are evenly distributed on the inner side of the outermost columns of the multi-span greenhouse. The load-bearing ropes that make up the internal grid of the main load-bearing frame are arranged in an alternating manner: the longitudinal load-bearing ropes corresponding to two adjacent longitudinal columns are respectively set on the opposite sides of the two longitudinal columns; the transverse load-bearing ropes corresponding to two adjacent transverse columns are respectively set on the opposite sides of the two transverse columns.

5. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 3 or 4, characterized in that: Both ends of the longitudinal and transverse load-bearing ropes are tensioned and connected to their respective slip rings via tensioners.

6. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 4, characterized in that: The outermost load-bearing rope of the main load-bearing frame is connected to the slip ring of the vertical support member in its column at at least one intermediate position along its length.

7. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 3, characterized in that: The longitudinal and transverse ropes of the anti-falling net are all connected by a connector at their intersections.

8. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 7, characterized in that: At the intersections of the longitudinal and transverse load-bearing ropes, a metal buckle is used to connect them. The metal buckle contains and restrains the two load-bearing ropes inside, while separating them from the corresponding post at the intersection.

9. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 1, characterized in that: Each of the longitudinal beams of the multi-span greenhouse is equipped with a take-up and extend rod, which is parallel to the longitudinal beam. The drive unit includes multiple drive motors independently configured for each of the take-up and extend rods, and a synchronization controller for controlling the synchronous rotation of the multiple drive motors.

10. The adjustable sugarcane anti-lodging device for multi-span greenhouses according to claim 9, characterized in that: The drive motor is a limit motor, which limits the highest and lowest positions of the anti-falling net.

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