A greenhouse windproof device

Abstract

The present application belongs to the technical field of greenhouse windproof, and particularly relates to a greenhouse windproof device, which comprises a steel pipe frame and a transparent film laid outside the steel pipe frame; further comprises: a compression belt, a plurality of which are laid on the outer side of the transparent film and the two ends of which extend to the two side bottoms of the transparent film; a base, which is laid on the two sides of the steel pipe frame; the compression mechanism comprises a winding shaft arranged above the base and a plurality of winding discs mounted on the winding shaft, and the compression belt is wound on each winding disc; a pipe winding device, at least two of which are arranged at the two ends of the transparent film close to the base; the compression guiding mechanism comprises a first U-shaped seat fixed on the base and a compression wheel rotatably mounted on the first U-shaped seat; the present application can prevent the compression force of the film compression rope on the transparent film from being too large, which can easily damage the transparent film, and the operator does not need to manually tighten and fix the compression belt, thereby reducing the labor intensity of the operator.

Description

A windproof device for greenhouses Technical Field

[0001] This invention belongs to the field of greenhouse wind protection technology, and in particular relates to a greenhouse wind protection device. Background Technology

[0002] Greenhouses need to have good wind and rain protection to protect the internal environment and crops from the impact of external weather. Based on wind field test data and engineering practice experience, windproof structures are designed. Greenhouses are mainly protected against wind using various methods such as wall windproofing, column windproofing, frame windproofing, and rope fixing to improve their wind resistance.

[0003] To improve the wind resistance of greenhouses, especially to prevent the greenhouse film from being blown off by strong winds, existing methods typically involve attaching multiple tension ropes to the outside of the film to secure it. However, this approach has limitations. Because the contact area between the tension ropes and the film is relatively small, excessive pressure from the ropes can easily damage the film. Furthermore, it hinders the proper ventilation of the greenhouse by rolling up the film at both ends during normal use. While some methods use wide straps to tighten the film for wind protection, this is primarily done manually. Clearly, if the greenhouse has a long axial length, this requires a significant amount of manpower to tighten the straps onto the film sequentially, and the pressure exerted by each strap varies. This not only affects the wind resistance but also complicates the assembly and use of the greenhouse. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0005] This invention relates to a windproof device for greenhouses, comprising a steel pipe frame and a transparent film laid on the outside of the steel pipe frame; further comprising: a plurality of clamping straps arranged on the outer side of the transparent film, with both ends extending to the bottom sides of the transparent film; bases laid on both sides of the steel pipe frame; two sets of tightening mechanisms respectively mounted on the two bases; the tightening mechanism includes a winding shaft mounted above the base and a plurality of winding reels mounted on the winding shaft, each winding reel having a clamping strap wound around it; at least two coils respectively mounted on both ends of the transparent film near the base; and a clamping guide mechanism, a plurality of which are assembled on the base, the clamping guide mechanism including a first U-shaped seat fixed on the base and a pressure roller rotatably mounted on the first U-shaped seat;

[0006] The pressure roller is located on one side near the winding tube, and the center point of the pressure roller is lower than the center point of the take-up reel. The lowest center point of the winding tube after falling is between the two center points of the pressure roller and the take-up reel.

[0007] In a preferred embodiment of the present invention, the tightening mechanism further includes a support frame fixed at both ends of the base and providing rotational support for the take-up shaft, several second U-shaped seats fixed on the base for providing rotational support for the take-up reel, and a locking block movably mounted on the bottom of the U-shaped groove of the second U-shaped seats for limiting the rotation of the take-up reel. A power component for driving the take-up shaft to rotate is fixed on one of the support frames.

[0008] In a preferred embodiment of the present invention, the bottom sides of the second U-shaped seat extend outward with base plates, and upright plates are fixed on the base plates. The upright plates are rotatably connected to the take-up shaft via bushings. The take-up reel is rotatably connected to the second U-shaped seat through the cooperation of the central tube and the bushings. The central tube is fixedly connected to the take-up reel. The take-up shaft rotates through the central tube, and the diameter of the take-up shaft is smaller than the inner diameter of the central tube, so that the take-up shaft is connected to the central tube through a docking transmission assembly.

[0009] In a preferred embodiment of the present invention, the docking transmission assembly includes a fixed ring fixed to the take-up shaft and located inside the upright plate, a spring member mounted on the side of the fixed ring and facing the side wall of the second U-shaped seat, a movable ring connected to the other end of the spring member and movably sleeved on the take-up shaft, a plurality of limiting blocks arranged in a circumferential array on the take-up shaft, and a plurality of docking blocks arranged in a circumferential array on the side of the movable ring; both ends of the central tube extend outside the two side walls of the U-shaped groove of the second U-shaped seat, and a plurality of docking slots are circumferentially arranged at both ends of the central tube; the docking blocks are respectively movably positioned between two adjacent limiting blocks; when the docking blocks are aligned with the docking slots, the docking blocks slide into the docking slots, thereby driving the take-up shaft and the central tube; when the docking blocks disengage from the docking slots, the take-up shaft and the central tube are disengaged from the driving connection.

[0010] In a preferred embodiment of the present invention, at least one limiting rod is fixedly provided on the side of the fixed ring near the moving ring. The free end of the limiting rod moves through a through hole on the moving ring. The limiting rod has two sets of limiting insertion holes along its length. A cotter pin is movably inserted into the limiting insertion hole near the outer side of the moving ring.

[0011] In a preferred embodiment of the present invention, one of the tubes wound with a transparent film has open rings installed at equal intervals, and the notch size of the open rings matches the thickness of the transparent film; the symmetrical open rings are placed on both sides of the clamping band, and a connecting piece is provided on one end of the clamping band near the outer side of the open rings. The connecting piece is connected to the clamping band and the symmetrical open rings on both sides by screws; and plugs are detachably installed at both ends of the tube.

[0012] In a preferred embodiment of the present invention, the power assembly includes either a servo motor or a direct drive motor mounted on the outside of one of the support frames and rotating with the take-up shaft, and the power assembly further includes a handwheel mounted on the other end of the take-up shaft.

[0013] In a preferred embodiment of the present invention, a sealing film is attached to the bottom of the steel pipe frame, with one end of the sealing film extending upward and the other end extending to the base.

[0014] The present invention has the following beneficial effects:

[0015] Firstly, the existing method of fixing the transparent film with pressure ropes is replaced with a pressure band with a certain width. This increases the contact area between the pressure bands and the transparent film when multiple pressure bands are used to press and fix the transparent film. This solution not only increases the pressing and fixing effect on the transparent film but also avoids damage to the transparent film caused by excessive pressure due to the small contact area of ​​the existing pressure ropes.

[0016] Secondly, since the ends of several clamping strips are wound around the winding reels, and these winding reels are connected to the same winding shaft, the rotation of the winding shaft can drive the winding reels to rotate synchronously. This facilitates the synchronous winding and tightening of the clamping strips laid on the transparent film, ensuring that each clamping surface of the transparent film receives the same clamping force. This further improves the windproof effect of the greenhouse and eliminates the need for operators to manually tighten and fix the clamping strips, thus reducing the labor intensity of the operators.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the internal structure of a greenhouse according to an embodiment of the present invention;

[0021] Figure 3 is a diagram showing the cooperation state of several sets of tightening mechanisms and pressure belts in an embodiment of the present invention;

[0022] Figure 4 is a diagram showing the cooperation state of a single set of tightening mechanism and pressing guide mechanism according to an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the pressing guide mechanism according to an embodiment of the present invention;

[0024] Figure 6 is a structural schematic diagram of the tightening mechanism according to an embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of the docking transmission assembly according to an embodiment of the present invention.

[0026] In the diagram: 1. Steel pipe frame;

[0027] 2. Transparent film;

[0028] 3. Pressure belt;

[0029] 4. Base;

[0030] 5. Tensioning mechanism; 51. Rewinding shaft; 52. Rewinding reel; 53. Support frame; 54. Second U-shaped seat; 55. Locking block; 56. Power assembly; 57. Base plate; 58. Vertical plate; 59. Center tube;

[0031] 6. Pipe coil; 61. Opening ring; 62. Connecting piece; 63. Plug;

[0032] 7. Pressing guide mechanism; 71. First U-shaped seat; 72. Pressure roller;

[0033] 8. Connecting transmission assembly; 81. Fixed ring; 82. Spring component; 83. Moving ring; 84. Limiting block; 85. Connecting insert block; 86. Connecting slot; 87. Limiting rod; 88. Limiting insertion hole; 89. Cotter pin. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0036] Please refer to Figures 1-7. This invention is a windproof device for a greenhouse, comprising a steel pipe frame 1 and a transparent film 2 laid on the outside of the steel pipe frame 1; it also includes: a plurality of pressing bands 3, which are arranged on the outer side of the transparent film 2 and extend to the bottom of both sides of the transparent film 2; bases 4, which are laid on both sides of the steel pipe frame 1; a tightening mechanism 5, which is installed in two sets on the two bases 4 respectively; the tightening mechanism 5 includes a winding shaft 51 mounted above the base 4 and a plurality of winding reels 52 mounted on the winding shaft 51, each winding reel 52 having a pressing band 3 wound on it; at least two winding tubes 6, which are respectively installed at both ends of the transparent film 2 near the base 4; and a pressing guide mechanism 7, which is assembled in several sets on the base 4, the pressing guide mechanism 7 including a first U-shaped seat 71 fixed on the base 4 and a pressure roller 72 rotatably mounted on the first U-shaped seat 71;

[0037] The pressure roller 72 is located on one side near the winding tube 6, and the center point of the pressure roller 72 is lower than the center point of the winding reel 52. The lowest center point of the winding tube 6 after falling is between the two center points of the pressure roller 72 and the winding reel 52.

[0038] Furthermore, the tightening mechanism 5 also includes a support frame 53 fixed at both ends of the base 4 and providing rotational support for the take-up shaft 51, a plurality of second U-shaped seats 54 fixed on the base 4 for providing rotational support for the take-up reel 52, and a locking block 55 movably mounted on the bottom of the U-shaped groove of the second U-shaped seat 54 for limiting the rotation of the take-up reel 52. One of the support frames 53 is fixed with a power assembly 56 for driving the take-up shaft 51 to rotate.

[0039] In a preferred embodiment of the present invention, the base 4 is laid on both sides of the bottom of the shed by concrete pouring or other methods. If the base 4 is made of concrete, several sets of rectangular array threaded rods need to be embedded at equal intervals during the casting process of the base 4 to fix several sets of corresponding first U-shaped seats 71, second U-shaped seats 54 and support frames 53 to the base 4, so as to install several pressure rollers 72 on the first U-shaped seats 71, install the winding shaft 51 on the symmetrical support frames 53, and install several winding reels 52 on the corresponding second U-shaped seats 54.

[0040] Place several pressing strips 3 onto the laid transparent film 2, adjusting the spacing between adjacent pressing strips 3 to be between 1.5m and 1.7m, so that the number of pressing strips 3 matches the axial length of the greenhouse. The ends of the pressing strips 3 should have a length of 1m to 1.5m reserved according to the transverse width of the greenhouse, and the width of the pressing strips 3 should be between 15cm and 25cm. Then, fix two rollers 6 to the ends of the transparent film 2. At this point, the height of the two rollers 6 on the ground is higher than the height of several pressure rollers 72 and lower than the height of several winding reels 52. Then, sequentially... Several pressing straps 3 pass through the bottom of the pressure rollers 72 at both ends and are then fixedly wound onto the take-up reel 52. This fixes the pressing straps 3 onto the take-up reel 52. Then, through the electrical control box inside the greenhouse, the power component 56 installed on the support frame 53 is driven so that the take-up shaft 51, which is symmetrically installed between the two support frames 53 on the same base 4, can drive several take-up reels 52 to rotate synchronously. The synchronous rotation of the take-up reels 52 can synchronously wind and press the pressing straps 3 onto the transparent film 2, so that the pressing straps 3 can synchronously press and fix the transparent film 2.

[0041] When the clamping belt 3 is wound up and tightened to a certain pressure (the tension of the clamping belt 3 can be checked by manually pulling the clamping belt 3), the operator can place the clamping block 55 at intervals at the bottom of the U-shaped groove of the second U-shaped seat 54, and make the arc-shaped surface of the clamping block 55 abut against the take-up reel 52, so as to fix the take-up reel 52 with the clamping belt 3 wound up, and prevent the take-up reel 52 from being connected to the power component 56 only through the take-up shaft 51, which would cause the power component 56 to be unable to provide sufficient axial fixation, resulting in the take-up reel 52 rotating on its own, which would affect the clamping and fixing effect of the clamping belt 3 on the transparent film 2 after tensioning.

[0042] At this point, it is important to note that a length can be marked at both ends of the clamping band 3 so that the ends of several clamping bands 3 can be wound around the take-up reel 52 at equal lengths.

[0043] The windproof device for greenhouses in this design, through the coordinated operation of the tensioning belt 3, the winding reel 52, the pressure roller 72, and the winding tube 6, has the following beneficial effects:

[0044] Firstly, the existing method of fixing the transparent film 2 with pressure ropes is replaced with a pressure band 3 of a certain width. This increases the contact area between the pressure bands 3 and the transparent film 2 when multiple pressure bands 3 are used to press and fix the transparent film 2. As a result, the pressure bands 3 in this solution not only increase the pressing and fixing effect on the transparent film 2, but also do not damage the transparent film 2. This prevents damage to the transparent film 2 caused by excessive pressure from the pressure ropes due to the small contact area between them.

[0045] Secondly, since the ends of several pressing strips 3 are wound around the winding reels 52, and the winding reels 52 are connected to the same winding shaft 51, the rotation of the winding shaft 51 can drive the winding reels 52 to rotate synchronously. This makes it easier for the several pressing strips 3 laid on the transparent film 2 to be wound and pressed synchronously onto the transparent film 2. This ensures that each pressing surface of the transparent film 2 is subjected to the same pressing force, thereby further improving the windproof effect of the greenhouse. At the same time, it eliminates the need for operators to manually tighten and fix the pressing strips 3, thus reducing the labor intensity of the operators.

[0046] Thirdly, since both ends of the transparent film 2 are fixed by the roll tube 6, and the lowest point of the roll tube 6 is located between the pressure roller 72 and the take-up reel 52, when the take-up reel 52 is winding the pressure band 3, the pressure roller 72 can press the pressure band 3 down and stick it to the transparent film 2 wound around the roll tube 6. This allows the wound pressure band 3 to not only press and fix the top of the transparent film 2, but also press and fix the end of the transparent film 2 that is on the ground. This prevents strong winds from acting on the bottom of the transparent film 2 at the non-pressure band 3 position, which could cause the end of the transparent film 2 to tear.

[0047] Fourthly, since both ends of the transparent film 2 are fixed by the roll tube 6, when the greenhouse is in normal use for ventilation, the operator only needs to loosen the clamping band 3 on one side (the end of the transparent film 2 that needs to be opened). At this time, the operator can lift the roll tube 6 manually or by other means so that the roll tube 6 can drive the end of the transparent film 2 to rise, so as to realize the ventilation of the greenhouse. And the ground end of the transparent film 2 will not be unable to be rolled up for ventilation due to the excessive clamping force of the clamping band 3 on the roll tube 6.

[0048] Referring to Figures 4-6, the bottom sides of the second U-shaped seat 54 have outwardly extending base plates 57, and upright plates 58 are fixed on the base plates 57. The upright plates 58 are rotatably connected to the take-up shaft 51 through bushings. The take-up reel 52 is rotatably connected to the second U-shaped seat 54 through the cooperation of the central tube 59 and the bushings. The central tube 59 is fixedly connected to the take-up reel 52. The take-up shaft 51 rotates through the central tube 59, and the diameter of the take-up shaft 51 is smaller than the inner diameter of the central tube 59, so that the take-up shaft 51 is connected to the central tube 59 through the docking transmission assembly 8.

[0049] As a preferred embodiment of the present invention, the extended base plate 57 and the upright plate 58 on the base plate 57 are both integrally formed with the second U-shaped seat 54, so that the upright plate 58 can provide gravity support for the long winding shaft 51, preventing the winding shaft 51 from bending due to its length and the fact that it is equipped with several winding reels 52.

[0050] The take-up shaft 51 passes through the take-up reel 52 via the central tube 59, and the take-up shaft 51 is connected to the central tube 59 via the docking transmission assembly 8. Therefore, when it is necessary to replace or adjust the clamping force of one of the clamping bands 3 that is damaged, taking the replacement or adjustment of the clamping band 3 located in the middle of the transparent film 2 as an example, the specific operation is as follows:

[0051] In the first method, the corresponding docking transmission component 8 on the non-central take-up reel 52 is moved to disengage the take-up shaft 51 from the central tube 59 on the non-central take-up reel 52. At this time, the operator needs to first insert the locking block 55 into the second U-shaped seat 54 without the locking block 55 to fix the take-up reel 52 that has been disengaged from the transmission connection. At this time, only the take-up reel 52 corresponding to the middle pressure band 3 that needs to be replaced or adjusted is connected to the take-up shaft 51 through the docking transmission component 8.

[0052] If it is necessary to replace the clamping belt 3, one end of the clamping belt 3 can be removed from the winding reel 52 on one side. Then, the power component 56 on the other side is controlled to work, so that the winding shaft 51 will only drive the winding reel 52 connected by the docking transmission component 8 to rotate. In this way, the clamping belt 3 that needs to be replaced can be pulled from the other side of the greenhouse to the winding side. Then, the winding reel 52 is driven to rotate in the opposite direction, so that the operator can quickly remove and replace the clamping belt 3 that needs to be replaced from the winding reel 52.

[0053] If it is necessary to continue tightening the clamping belt 3, the two sets of power components 56 can be driven to work simultaneously, so that they drive the individually connected take-up reel 52 to rotate through the take-up shaft 51. Thus, the synchronous and opposite rotation of the two take-up reels 52 can continue to drive the individual clamping belt 3 to perform individual tightening work, which makes it convenient to replace the individual clamping belt 3 or adjust the clamping force.

[0054] The second method involves disconnecting the take-up reel 52 corresponding to the pressing band 3 that needs to be replaced or adjusted from the take-up shaft 51 via the docking transmission assembly 8, while the other take-up reels 52 remain connected to the take-up shaft 51 via the docking transmission assembly 8. Since the take-up reel 52 corresponding to the pressing band 3 to be replaced or adjusted is in a free state, the operator can manually drive the take-up reel 52 to rotate on the second U-shaped seat 54. This allows for individual adjustment of the pressing force and effect of the pressing band 3 on the transparent film 2. Simultaneously, the pressing band 3 to be replaced can be wound up and removed. Compared to the first method, this method does not require the operator to sequentially operate multiple sets of docking transmission assemblies 8 to disconnect the take-up reel 52 corresponding to the pressing band 3 that does not need to be replaced from the take-up shaft 51, allowing for the replacement or adjustment of a single pressing band 3. However, the operator must manually drive the take-up reel 52 to rotate or manually remove the pressing band 3 to be replaced from the transparent film 2.

[0055] Referring to Figures 6 and 7, the docking transmission assembly 8 includes a fixed ring 81 fixed on the take-up shaft 51 and located inside the upright plate 58, a spring member 82 mounted on the side of the fixed ring 81 and facing the side wall of the second U-shaped seat 54, a movable ring 83 connected to the other end of the spring member 82 and movably sleeved on the take-up shaft 51, a plurality of limiting blocks 84 circumferentially arranged on the take-up shaft 51, and a plurality of docking inserts 85 circumferentially arranged on the side of the movable ring 83; the two ends of the central tube 59 extend outside the two side walls of the U-shaped groove of the second U-shaped seat 54, and a plurality of docking slots 86 are circumferentially arranged at the two ends of the central tube 59; the docking inserts 85 are respectively movably placed between two adjacent limiting blocks 84.

[0056] When the docking block 85 is aligned with the docking slot 86, the docking block 85 slides into the docking slot 86, so that the winding shaft 51 is connected to the center tube 59 in a transmission connection; when the docking block 85 is disengaged from the docking slot 86, the winding shaft 51 is disengaged from the center tube 59 in a transmission connection.

[0057] In a preferred embodiment of the present invention, there are preferably six limiting blocks 84, which are installed on the take-up shaft 51 by means of screws, welding or adhesive. The fixing ring 81 is also fixedly installed on the take-up shaft 51 in the same way and is located on the inner side of the upright plate 58 in a non-contact state. Similarly, there are preferably six docking slots 86 circumferentially opened at the center end. The side of the six docking blocks 85 is in contact with the side of the limiting blocks 84 to achieve axial limiting of the docking blocks 85.

[0058] Therefore, when it is necessary to disconnect the central tube 59 from the winding shaft 51, the moving ring 83 needs to be moved towards the fixed ring 81. At this time, the spring 82 sleeved on the winding shaft 51 will be compressed, and the movement of the moving ring 83 will drive the multiple docking blocks 85 in the circumferential array to exit from the docking slot 86. It is necessary to ensure that the docking blocks 85 do not disengage from the two adjacent limit blocks 84. Then, the moving ring 83 is axially limited and fixed (in the length direction of the winding shaft 51), which facilitates the disconnection of the winding shaft 51 and the central tube 59 from the transmission connection. The winding reel 52, which is disconnected from the winding shaft 51, can be manually rotated independently. When the winding shaft 51 rotates, it can drive the fixed ring 81, the moving ring 83, and the docking blocks 85 to rotate synchronously, so that the docking transmission assembly 8 after disconnection will not interfere with the normal rotation of the winding shaft 51.

[0059] When the take-up shaft 51 needs to be connected to the central tube 59 so that the take-up shaft 51 drives the take-up reel 52 to rotate, it is necessary to adjust the six docking blocks 85 to align with the six docking slots 86, and then release the limit on the moving ring 83 so that the compressed spring 82 pushes the moving ring 83 away from the fixed ring 81 through its own elastic restoring force. This allows the docking blocks 85 to be inserted into the docking slots 86 opened at the end of the central tube 59. Then, the rotation of the take-up shaft 51 can be achieved by the cooperation of the limit block 84, the docking blocks 85 and the docking slots 86, so that the central tube 59 drives the take-up reel 52 to rotate. This makes it easier for the take-up reel 52 to rotate automatically to wind up the pressure belt 3.

[0060] This allows the take-up shaft 51 and the center tube 59 of this solution to disconnect the transmission connection and axial transmission connection through the cooperation of the axially moving docking transmission assembly 8. This makes it easier for the take-up shaft 51 to drive one or more take-up reels 52 to rotate independently or to manually drive one of the take-up reels 52 to rotate independently. This makes it easier to replace one of the damaged clamping bands 3 without interfering with the clamping and fixing of the transparent film 2 by the other clamping bands 3.

[0061] Furthermore, at least one limiting rod 87 is fixedly provided on the side of the fixed ring 81 near the moving ring 83. The free end of the limiting rod 87 moves through the moving ring 83 and has a through hole. The limiting rod 87 has two sets of limiting insertion holes 88 along its length direction. A cotter pin 89 is movably inserted into the limiting insertion hole 88 near the outer side of the moving ring 83.

[0062] In a preferred embodiment of the present invention, when the moving ring 83 moves toward the fixed ring 81 and the mating block 85 disengages from the mating slot 86, the moving ring 83 will move to the side of the limiting hole 88 near the fixed ring 81. Then, the operator can insert the cotter pin 89 into the limiting hole 88 so that the cotter pin 89 can axially limit the moving ring 83 and prevent the moving ring 83 from driving the mating block 85 to move in the opposite direction under the push of the elastic restoring force of the spring member 82.

[0063] When the docking block 85 needs to be inserted into the docking slot 86, the end of the docking block 85 is adjusted to align with the docking slot 86. Then, the cotter pin 89 in the limiting hole 88 near the fixing ring 81 is removed, while the cotter pin 89 inserted in the limiting hole 88 away from the fixing ring 81 and located at the end of the limiting rod 87 is retained. Then, under the elastic restoring force of the spring member 82, the moving ring 83 will drive the docking block 85 to be inserted into the docking slot 86, which facilitates the transmission connection between the winding shaft 51 and the center tube 59.

[0064] The limiting rod 87 not only guides the sliding movement of the moving ring 83 axially, but also provides gravity support for the moving ring 83 and several docking blocks 85, preventing the moving ring 83 from falling off when it is movably sleeved on the take-up shaft 51.

[0065] Referring to Figures 3 and 4, one of the roll tubes 6 on which the transparent film 2 is wound has open rings 61 installed at equal intervals, and the size of the notch of the open rings 61 matches the thickness of the transparent film 2.

[0066] The symmetrical open rings 61 are placed on both sides of the clamping band 3. A connecting piece 62 is provided at one end of the clamping band 3 near the outer side of the open rings 61. The connecting piece 62 is connected to the clamping band 3 and the symmetrical open rings 61 on both sides by screws. The two ends of the coil tube 6 are detachably equipped with plugs 63.

[0067] As a preferred embodiment of the present invention, since greenhouses need to be ventilated during normal use, and the ventilation of existing greenhouses is basically done by the operator manually rolling up the end of the transparent film 2 that is in contact with the ground, but due to the pressure of the clamping belt 3, it is not convenient to roll it up.

[0068] Therefore, in this solution, the free end of the transparent film 2 that contacts the ground is wound onto the roll tube 6, and the ventilation method of the transparent film 2 is as follows:

[0069] In the first method, if only one side of the transparent film 2 needs to be wound up, for example, the transparent film 2 connected to the opening ring 61 by the connecting piece 62, the winding shaft 51 on the other side can be controlled to rotate, so that several winding reels 52 drive several clamping belts 3 to wind up. The winding reel 52 on the side that needs to be opened for ventilation releases the clamping belt 3. At this time, the clamping belt 3 on the side that needs to be ventilated will be continuously pulled, which will then drive the winding tube 6 to move upward through the connecting piece 62 and the opening ring 61, so as to automatically pull the transparent film 2 upward for ventilation.

[0070] The second method is to roll up the transparent film 2 on the other side (the side where the open ring 61 on the roll tube 6 is not connected to the clamping band 3). In this case, the winding shaft 51 on that side needs to be rotated to release the clamping band 3 on that side, while the winding shaft 51 on the other side is stationary. This allows the clamping band 3 on that side to be relaxed and released from the clamping band 6 on that side. Then, the operator can manually lift one end of the transparent film 2 to allow ventilation.

[0071] Alternatively, a motor can be installed at the end of the roll tube 6, and the motor can be supported by a hinged support rod, so that the transparent film 2 on that side can be rolled up onto the roll tube 6, thereby opening the transparent film 2 on that side for ventilation. The method of using a motor to drive the roll tube to roll up the transparent film 2 is existing technology and will not be described in detail here.

[0072] The third method, if it is for convection ventilation (both ends of the transparent film 2 are opened for ventilation simultaneously), requires first opening the transparent film 2 on the side not connected to the clamping band 3 on the opening ring 61 on the roll tube 6. The way to open the transparent film 2 on this side is the same as the second method. After the transparent film 2 on this side is opened, it needs to be hung on both ends of the roll tube 6 through the hooks at both ends of the greenhouse to fix the roll tube 6 on the first opened transparent film 2. Then, the first method is operated so that the rolled clamping band 3 can drive the transparent film 2 on the other side to be lifted and opened, thereby facilitating the opening of both ends of the transparent film 2 for convection ventilation.

[0073] If it is necessary to lower the transparent film 2, first roll up the clamping belt 3 so that the clamping belt 3 drives the connected roll tube 6 to descend, so that the transparent film 2 on this side is sealed first. Then loosen the clamping belt 3 on the other side so that the roll tube 6 on the other side descends or the roll tube 6 rotates in the opposite direction to release the rolled transparent film 2 and fall to near the ground. Then roll up the clamping belt 3 on this side to press and fix the transparent film 2.

[0074] It should be noted that the opening ring 61 is sequentially sleeved onto the roll tube 6 from one end of the roll tube 6 and can move freely on the roll tube 6. It is then sealed by the plug 63. However, if the end of the roll tube 6 is equipped with a motor that drives the transparent film 2 to wind up, the opening ring 61 and the plug 63 do not need to be installed on the roll tube 6.

[0075] Referring to Figure 3, the power assembly 56 includes either a servo motor or a direct drive motor mounted on the outside of one of the support frames 53 and rotating with the take-up shaft 51. The power assembly 56 also includes a handwheel mounted on the other end of the take-up shaft 51.

[0076] In a preferred embodiment of the present invention, a servo motor and a handwheel are respectively connected to both ends of the same take-up shaft 51. If the take-up shaft 51 needs to drive several take-up reels 52 to rotate normally so that the clamping band 3 is properly pressed onto the transparent film 2, the servo motor can be controlled by the control box to drive the take-up shaft 51 to rotate. If there is a strong wind or power failure and it is necessary to adjust the clamping force of several clamping bands 3 on the transparent film 2, the rotor of the servo motor after the power failure is in a free state in the housing. Then, the operator can turn the handwheel at the other end to drive the take-up shaft 51 to rotate, so as to continue to adjust the clamping force of the clamping band 3 on the transparent film 2. Then, the clamping block 55 is placed into the second U-shaped seat 54 to realize the rotation and fixation of the take-up reel 52 and prevent the take-up reel 52 from rotating on its own.

[0077] Referring to Figures 1-3, a sealing film is attached to the bottom of the steel pipe frame 1, with one end of the sealing film extending upward and the other end extending to the base 4. The design of the sealing film can seal the area near the bottom of the steel pipe frame 1, preventing the bottom of the transparent film 2 from not being able to contact the ground or being embedded in the ground, thus affecting the heat preservation work of the greenhouse.

[0078] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A windproof device for a greenhouse, comprising a steel pipe frame and a transparent film laid on the outside of the steel pipe frame; characterized in that, Also includes: Several clamping bands are arranged on the outer side of the transparent film, extending to the bottom sides of the transparent film at both ends; bases are laid on both sides of the steel pipe frame; two sets of tightening mechanisms are respectively mounted on the two bases; the tightening mechanism includes a take-up shaft mounted above the base and several take-up reels mounted on the take-up shaft, each take-up reel having clamping bands wound on it; at least two rollers are respectively mounted on both ends of the transparent film near the base; several clamping guide mechanisms are assembled on the base, the clamping guide mechanism including a first U-shaped seat fixed on the base and a pressure roller rotatably mounted on the first U-shaped seat; wherein... The pressure roller is positioned on one side near the winding tube, and its center point is lower than the center point of the take-up reel. The lowest center point of the winding tube after falling is between the two center points of the pressure roller and the take-up reel. The tightening mechanism also includes support frames fixed to both ends of the base and supporting the rotation of the take-up shaft, several second U-shaped seats fixed to the base for supporting the rotation of the take-up reel, and locking blocks movably mounted on the bottom of the U-shaped groove of the second U-shaped seats for limiting the rotation of the take-up reel. A power assembly for driving the take-up shaft to rotate is fixed on one of the support frames. The bottom sides of the second U-shaped seats extend outwards. The device has a base plate with a vertical plate fixed to it. The vertical plate is rotatably connected to a take-up shaft via a bushing. The take-up reel is rotatably connected to a second U-shaped seat via a central tube and a bushing. The central tube is fixedly connected to the take-up reel. The take-up shaft rotates through the central tube, and its diameter is smaller than the inner diameter of the central tube, allowing the take-up shaft to be connected to the central tube via a docking transmission assembly. The docking transmission assembly includes a fixing ring fixed to the take-up shaft and located inside the vertical plate, a spring element installed on the side of the fixing ring and facing the side wall of the second U-shaped seat, and a spring element connected to the other end of the spring element and movably sleeved on the take-up reel. The device comprises a movable ring on the shaft, several limiting blocks arranged in a circumferential array on the take-up shaft, and several docking blocks arranged in a circumferential array on the side of the movable ring; the two ends of the central tube extend beyond the outer sides of the U-shaped groove of the second U-shaped seat, and several docking slots are arranged in a circumferential array at the two ends of the central tube; the docking blocks are movably positioned between two adjacent limiting blocks; when the docking blocks are aligned with the docking slots, the docking blocks slide into the docking slots, thereby driving the take-up shaft and the central tube; when the docking blocks disengage from the docking slots, the take-up shaft and the central tube are disengaged from the driving connection.

2. The greenhouse windproof device according to claim 1, characterized in that, At least one limiting rod is fixed to the side of the fixed ring near the moving ring. The free end of the limiting rod moves through a through hole on the moving ring. The limiting rod has two sets of limiting insertion holes along its length. A cotter pin is movably inserted into the limiting insertion hole near the outer side of the moving ring.

3. A greenhouse windproof device according to claim 1, characterized in that, One of the tubes wound with a transparent film has open rings installed at equal intervals, and the size of the notch of the open ring matches the thickness of the transparent film; the symmetrical open rings are placed on both sides of the clamping band, and a connecting piece is provided on one end of the clamping band near the outer side of the open ring. The connecting piece is connected to the clamping band and the symmetrical open rings on both sides by screws; plugs are detachably installed at both ends of the tube.

4. A greenhouse windproof device according to claim 1, characterized in that, The power assembly includes either a servo motor or a direct drive motor mounted on the outside of one of the support frames and rotating with the take-up shaft, and the power assembly also includes a handwheel mounted on the other end of the take-up shaft.

5. A greenhouse windproof device according to claim 1, characterized in that, The bottom of the steel pipe frame is fitted with a sealing film, with one end of the sealing film extending upwards and the other end extending to the base.

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