A greenhouse film covering device

Abstract

This invention provides a greenhouse film covering device, which is installed outside the greenhouse and includes: a traction frame erected outside the greenhouse; and a film traction assembly, which includes a movable frame, a drive mechanism for moving the movable frame, a clamping and traction mechanism for clamping and pulling one end of the film, and a support mechanism for vertically placing the film roll. The movable frame is movably mounted on the traction frame via the drive mechanism. The clamping and traction mechanism includes a power source, a traction block, and a clamping block. The traction block is fixedly mounted on the power source and has a mounting hole. The clamping block has a clamping end for clamping one end of the film and a mounting end for mounting in the mounting hole of the traction block. After the film is clamped, the mounting end is inserted into the mounting hole. This invention enables efficient film covering of the upper part of the greenhouse, improving efficiency and reducing labor.

Description

Technical Field

[0001] This invention belongs to the field of agricultural planting equipment technology, and in particular relates to a greenhouse covering device. Background Technology

[0002] Using greenhouses covered with plastic film for planting artificially creates a suitable ecological environment, adjusts the vegetable production season, regulates market demand, and promotes high-quality and high-yield crops, which is one of the effective means to increase farmers' income.

[0003] Planting greenhouses are generally constructed using materials such as bamboo and wood poles, cement poles, lightweight steel pipes, or tubing to form a frame, which includes columns, tie rods, arches, and compression rods. The greenhouse is then covered with plastic film to form an arched structure. This method is simple in structure, low in cost, and provides excellent protection against cold and heat.

[0004] However, the process of covering greenhouses with plastic film presents challenges such as high roof heights and the film's susceptibility to damage when stretched against the frame. This results in difficulties, a large labor force required, long processing times, and low efficiency, especially in windy weather, where the difficulty and potential danger are even greater. Furthermore, shading is necessary when sunlight is too intense, requiring the manual installation of shade nets or fabrics, which is cumbersome and prevents timely shading.

[0005] Therefore, the above problems need to be solved. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a greenhouse covering device to solve the technical problem that, due to the flexible nature of plastic film, it is difficult to cover the top of the greenhouse when the greenhouse is too high, making the covering process extremely cumbersome, inefficient, and a waste of labor.

[0007] To achieve the above and other related objectives, the present invention provides a greenhouse film covering device, comprising: A traction frame, which is erected on the outside of the greenhouse; A film traction assembly, comprising a movable frame, a drive mechanism for moving the movable frame, and a mechanism for... The device includes a clamping and traction mechanism for clamping and pulling one end of a film and a support mechanism for vertically placing the film roll. The movable frame is movably mounted on the traction frame via the drive mechanism. The clamping and traction mechanism includes a power source, a traction block, and a clamping block. The traction block is fixedly mounted on the power source and has a mounting hole. The clamping block has a clamping end for clamping one end of the film and a mounting end for mounting in the mounting hole of the traction block. After the film is clamped, the mounting end is inserted into the mounting hole. The moving direction of the movable frame is perpendicular to the moving direction of the clamping block. The greenhouse is also equipped with sunshade components.

[0008] In this way, the film is placed on the support mechanism, and after one end of the film is clamped by the clamping block, the film is moved along the length of the greenhouse by the power source. After the movement is completed, the film is moved along the width of the greenhouse by the drive mechanism, thereby moving the film to the top of the greenhouse.

[0009] Preferably, the movable frame has a T-shaped cross-section groove. The power source includes a first motor, a belt, and a set of synchronous pulleys. The belt passes through the groove in a loop via the synchronous pulleys, then over the movable frame and rests within the groove. The traction block is disposed within the groove and fixedly connected to the belt. The first motor is fixedly mounted above the movable frame and engages with the belt via the synchronous pulleys. Using a motor and belt makes the traction block more stable during movement and allows it to travel a longer distance.

[0010] Preferably, the drive mechanism includes a connecting seat, a roller, a second motor, and a lead screw. The motor is fixedly mounted on the traction frame, and the lead screw is rotatably mounted on the traction frame. The connecting seat has a threaded hole and is screwed onto the lead screw through the threaded hole. The lower end of the connecting seat is fixedly mounted on the upper end of the movable frame. The roller is rotatably mounted in the connecting seat and rolls with the upper end of the traction frame. The output end of the second motor and one end of the lead screw are meshed by two gears.

[0011] Preferably, the support mechanism is located on one or both sides of the traction frame, including an upper limit post, a lower limit post, a support platform, and an adjustable frame. The upper limit post is rotatably mounted on the traction frame via a mounting bracket. The support platform is fixedly mounted on the lower end of the lower limit post. The portion of the lower limit post below the support platform rotates on the adjustable frame via a rolling bearing. The adjustable frame is vertically adjustable on the traction frame and fixed by locking bolts. The upper limit post and the lower limit post are collinear and perpendicular. Using the support mechanism, the film roll is placed on the rotatably mounted support platform, facilitating the pulling of the film by the clamping and traction mechanism.

[0012] Preferably, an auxiliary mechanism for assisting in clamping the film is provided below the movable frame. This auxiliary mechanism is linearly arranged on the movable frame and includes symmetrically arranged supports, clamping wheels, and elastic elements. The supports are symmetrically installed below the movable frame, and the clamping wheels are rotatably mounted on opposite sides of the supports via the elastic elements, with the symmetrical clamping wheels abutting against each other. The clamping wheels are located below the clamping block. Through the elastic elements and the rotatably arranged clamping wheels, the upper end of the film can be clamped while facilitating the traction block to move the film along the length of the greenhouse, ensuring that the upper side of the film is always clamped and supported.

[0013] Preferably, the traction block has a mounting hole, in which a universal ball bearing is installed to provide auxiliary support for the traction block. The universal ball bearing is arranged to roll within a groove. The universal ball bearing can support the traction block without affecting its movement.

[0014] Preferably, one or more tracks are horizontally arranged above the traction frame, each track having a limiting platform in the middle. Each track is equipped with a rolling roller and a connecting seat, and the roller has a recess that mates with the limiting platform. The cooperation between the roller and the limiting platform causes the roller to roll in a straight line.

[0015] Preferably, one or more film pressing mechanisms are also provided on one side of the traction frame. Each film pressing mechanism includes a mounting frame, a connecting plate, an electric telescopic rod, and a pressure plate. The mounting frame is fixedly mounted on the traction frame, the fixed end of the electric telescopic rod is fixedly mounted on the mounting frame, and the movable end of the electric telescopic rod moves vertically downwards. The connecting plate is fixedly mounted on the top of the movable end of the electric telescopic rod, and the pressure plate is rotatably mounted below the connecting plate. Several mushroom-shaped suction cups are linearly arranged on the side of the connecting plate that contacts the film. After the moving frame moves the film to the other side of the greenhouse width, the electric telescopic rod causes the suction cups on the connecting plate to adhere to the upper side of the film, facilitating further downward pulling of the film and bringing the film on the side of the film pressing mechanism to the designated position.

[0016] Preferably, the top of the greenhouse is arc-shaped, and rolling tubes are rotatably arranged between the frames. The rolling tubes are evenly distributed on the top of the greenhouse, and the tangent of the surface of the rolling tube is higher than the tangent of the top of the greenhouse. By utilizing the rolling tubes, the friction between the film and the greenhouse is reduced when the film is pulled in the width direction, which is more labor-saving and can prevent the film from being torn.

[0017] Preferably, the shade net roll is rotatably mounted on the placement seat via a rotating shaft. The rotating shaft is rotatably mounted on the placement seat. The winding and unwinding mechanism includes a third motor, a second synchronous pulley group, a third synchronous pulley group, and a rope pulling mechanism. The third motor is fixedly mounted on the placement seat. The third motor is connected to one end of the rotating shaft via the second synchronous pulley group. The rope pulling mechanism is connected to one end of the rotating shaft via the third synchronous pulley group.

[0018] Preferably, the rope-pulling mechanism includes a shade net fixing rod, a roller frame, a roller seat, a pull rope, a fixed pulley block, and a winding reel. The roller frame is fixedly installed inside the greenhouse along the length of the greenhouse. The roller frame has a rolling groove, and the rollers of the roller seat roll in the rolling groove. The winding reel is vertically rotatably installed on the outside of the placement seat and connected to the rotating shaft through the third synchronous pulley block. The shade net fixing rod is fixedly installed above the roller seat. The fixed pulley block is fixedly installed inside the greenhouse. After passing through the fixed pulley block, the two ends of the pull rope are respectively fixedly connected to the roller seat and the winding reel.

[0019] After the third motor starts, it can make the shaft rotate, which in turn drives the winding reel and the shade net roll to rotate. During the rotation, the pull rope is wound up by the winding reel, which pulls the roller seat to move on the roller frame, so that the shade net fixing rod moves with the shade net in sync, so that the shade net covers the greenhouse and plays a shading role.

[0020] The beneficial effects of this invention are as follows: In using this invention, the film is placed on a support mechanism. One end of the film is clamped by a clamping block, and a power source moves the film along the length of the greenhouse. After movement, a drive mechanism moves the film along the width of the greenhouse, thus bringing it to the top of the greenhouse. This setup makes greenhouse covering more convenient and faster, reducing labor and minimizing film damage during the process. Furthermore, the shading assembly facilitates control of the opening and closing of the shading net, regulating the temperature inside the greenhouse and promoting plant growth. Attached Figure Description

[0021] Figure 1 The diagram shown is a schematic representation of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective.

[0023] Figure 3 The diagram shown is a partial structural schematic of the thin-film traction assembly.

[0024] Figure 4 The diagram shows the structure of the clamping block and the traction block.

[0025] Figure 5 The diagram shown is a partial structural schematic of the drive mechanism.

[0026] Figure 6 The diagram shown is a partial structural schematic of the sunshade component.

[0027] Figure 7 The diagram shown is a schematic of the membrane pressing mechanism.

[0028] Figure 8 The diagram shows the installation structure of the connector and the movable frame.

[0029] Figure 9 The diagram shows the installation structure of the limit plate.

[0030] Figure 10 The diagram shows a partial structural schematic of the support mechanism. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0032] Please see Figures 1 to 10 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0033] like Figure 1-2 As shown, a greenhouse film covering device includes: a greenhouse 1, a traction frame 2, and a film traction assembly 3. The traction frame 2 is installed outside the greenhouse 1. The greenhouse 1 is framed by circular or square lightweight steel pipes or tubing, etc., with an arc-shaped top. Rotatable rolling tubes 101 are installed between the frames. The tangent of the outer surface of the rolling tubes 101 is slightly higher than the arc-shaped tangent of the top of the greenhouse, which reduces the friction between the film and the frame when the film is pulled in the width direction, making it more labor-saving and preventing the film from being torn.

[0034] Specifically, movable wheels can be installed below the traction frame 2 to facilitate its movement, allowing the traction frame to be moved to other greenhouses for covering.

[0035] like Figure 3-5 As shown, in this embodiment, the film traction assembly 3 includes a movable frame 310, a driving mechanism 320 for driving the movable frame 310 to move, and a clamping and traction mechanism 330 for clamping and tractioning one end of the film. The movable frame 310 is movably mounted on the traction frame 2 through the driving mechanism 320. The movable frame 310 has a slide groove 311 with a T-shaped cross-section.

[0036] Specifically, the clamping and traction mechanism 330 drives the film to move along the length of the greenhouse 1. It includes a traction block 331, a clamping block 332, a first motor 333, a first belt 334, and several first synchronous pulleys 335. The first synchronous pulleys 335 are rotatably mounted on the moving frame 310 through the mounting support 337, and can make the first belt 334 tensioned on the first synchronous pulleys 335. The first belt 334 is arranged in a vertically rotating ring shape, and the lower part is rotatably arranged in the slide groove 311 of the moving frame 310. The first motor 333 is fixedly mounted on the movable frame 310. A second synchronous pulley 338 and a second belt 339 are provided between the first motor 333 and the first synchronous pulley 335. The rotation of the first motor 333 drives the second belt 339 to rotate, thereby driving the first synchronous pulley 335 to rotate. The rotation of the first synchronous pulley 335 drives the first belt 334 to rotate. The traction block 331 is located in the slide groove 311 and is fixedly connected to the first belt 334. During the rotation of the first belt 334, the traction block 331 moves. The traction block 331 is square with mounting holes 340. The clamping blocks 332 are arranged in pairs and have one end for clamping the film. The clamping end 341 and the mounting end 342 for mounting in the mounting hole 340 of the traction block 331 are provided. The side of the clamping end that is in contact with the traction block 331 has a number of interlocking teeth that can clamp the film. The mounting end after clamping the film is square and can be inserted into the mounting hole of the traction block 331. The square mounting hole can prevent the film from shifting due to the rotation of the clamping block 332 during the pulling of the film. The traction block 331 has a mounting hole in which a universal ball bearing 312 is installed. The universal ball bearing 312 rolls in the slide groove 311 and can play an auxiliary support role during the movement of the traction block 331.

[0037] like Figure 3 or Figure 10As shown, in this embodiment, a support mechanism 7 is also provided to facilitate the unwinding of the film roll C. The support mechanism 7 is located on one side of the traction frame 2 and includes an upper limit post 710, a lower limit post 711, a support platform 712, and an adjustable frame 713. The upper limit post 710 is mounted on the traction frame 2 via a mounting bracket 714. The support platform 712 is fixedly mounted on the lower end of the lower limit post 710. The lower limit post 711 below the support platform 712 rotates on the adjustable frame 713 via a rolling bearing. The adjustable frame 713 is mounted on the traction frame 2 in an adjustable manner and can be locked by a locking bolt 715. A locking surface 716 is provided on the traction frame on the side where the bolt 715 is locked. The locking surface 716 is toothed in the vertical direction. After the bolt 715 is locked, it is locked between the teeth of the locking surface 716. The upper limit post 710 and the lower limit post 711 are collinear and perpendicular.

[0038] like Figure 3 As shown, in this embodiment, in order to reduce the influence of the film's own gravity during the traction process, an auxiliary mechanism 4 is also provided to assist in clamping the upper end of the film. The auxiliary mechanism 4 is linearly arranged below the moving frame 310 and includes a pair of symmetrically arranged brackets 410, clamping wheels 411, springs 412 and telescopic rods 413. The brackets 410 are vertically installed below the moving frame 310, and the telescopic rods 413 are horizontally arranged. One end is installed at the lower end of the brackets 410, and the other end is connected to the clamping wheels 411. The springs 412 are sleeved on the outside of the telescopic rods, and both ends abut against the brackets 410 and the clamping wheels 411. The two clamping wheels 411, which are arranged in pairs, abut against each other under the action of the springs 412 and the telescopic rods 413, and their height is lower than that of the clamping block 332. After the film is pulled by the traction block 331, it passes over the clamping wheels 411. Through the action of the springs 412 and the telescopic rods 413, the film is clamped between the clamping wheels 411.

[0039] like Figure 5 or Figure 8As shown, in this embodiment, three tracks 321 are horizontally arranged above the traction frame 2 in the width direction of the greenhouse 1. The moving frame is set below the tracks by a drive assembly 320. The drive assembly 320 drives the moving frame 310 to move in the width direction of the greenhouse 1. The drive assembly 320 includes a connecting seat 322, rollers 323, a second motor 324, and a lead screw 325. The connecting seat 322 and the tracks 321 are arranged in pairs. The moving frame 310 is fixedly installed below the connecting seat 322. There is a channel 326 between the connecting seat 322 and the moving frame 310 in the same direction as the width of the greenhouse 1. The track 321 passes through the channel 326. The rollers 323 are rotatably installed on the connecting seat 322 and located within the channel 326. The center has an arc-shaped limiting platform 327, and a roller 323 has a recess that cooperates with the limiting platform 327. When the roller 323 rolls on the track 321, it moves linearly along the limiting platform 327. The lead screw 325 is horizontally rotatably mounted on the traction frame 2 through two mounting blocks 328. The direction of the axis of the lead screw 325 is the same as the width direction of the greenhouse 1. One of the connecting seats 322 has a threaded hole and is screwed onto the lead screw 325 through the threaded hole. The rotation of the lead screw 325 causes the connecting seat 322 to move. The second motor 324 is fixedly mounted on the traction frame 2. The output end of the second motor 324 has a bevel gear 329 that meshes with one end of the lead screw 325. The second motor 324 drives the lead screw to rotate through the bevel gear 328.

[0040] like Figure 7 As shown, in this embodiment, the traction frame 2 is also provided with a film pressing mechanism 5 for removing the film from the clamping wheel. The mechanism includes a mounting frame 510, a connecting plate 511, an electric telescopic rod 512, and a pressure plate 513. The mounting frame 510 is fixedly mounted on the traction frame 2. The fixed end of the electric telescopic rod 512 is fixedly mounted on the mounting frame 510. The movable end of the electric telescopic rod 512 moves vertically downward. The connecting plate 511 is fixedly mounted on the top of the movable end of the electric telescopic rod 512. The pressure plate 513 is rotatably mounted below the connecting plate 511 via a rotating seat 516. Two rows of suction cups 514 are linearly arranged on the side of the pressure plate 513 that contacts the film. A guide rod 515 is fixedly mounted on the connecting plate 511. The guide rod 515 is arranged on both sides of the electric telescopic rod 512 and is slidably coupled with the mounting frame 510. When the movable end of the electric telescopic rod 512 moves, it guides and limits the movement of the connecting plate 511.

[0041] like Figure 6 or Figure 9As shown, in this embodiment, a shading component 6 for blocking sunlight is also provided inside the greenhouse 1. The shading net or shading cloth is initially in a rolled-up state. When shading is needed, it is unrolled along the length of the greenhouse 1 to provide shading for the plants below. A placement seat 610 is installed inside the greenhouse. The shading net roll 611 is horizontally rotatable on the placement seat 610 via a rotating shaft. A third motor 612 is installed on the placement seat 610. A second synchronous pulley set 614 is provided between the output end of the third motor 612 and the rotating shaft 613. Through the second synchronous pulley set 614, the third motor 612 can drive the rotating shaft 613 to rotate. A winding reel 615 is also rotatably provided on the placement seat 610. The winding reel 615 and the rotating shaft 613 are connected by the third synchronous pulley set 616.

[0042] A roller frame 617 is fixedly installed along the length of greenhouse 1. The roller frame 617 has a U-shaped rolling groove 618. A roller seat 619 is located inside the rolling groove 618. The roller seat 619 moves within the rolling groove 618 via rollers. A shade net fixing rod 620 for fixing and connecting the shade net is fixedly installed above the roller seat 619. The shade net fixing rod 620 is horizontally installed along the width of greenhouse 1. The outermost part of the shade net roll B is fixedly sleeved on the shade net fixing rod 620. A fixed pulley is provided on the outer side of the end away from the third motor 612. Several fixed pulleys are linearly arranged along the length direction inside the greenhouse 1, forming a fixed pulley group 621. A limiting plate 622 is fixedly installed in the rolling groove 618. The limiting plate has a through hole. One end of the pull rope (not shown in the figure) is fixedly connected to the roller seat, and the other end passes through the through hole 625 on the limiting plate 622 and is fitted onto the fixed pulley group 621. The other end is fixedly connected to the winding reel 615, and the pull rope is in a taut state.

[0043] Specifically, when shading is needed, the third motor starts, driving the shading net roll on the rotating shaft to rotate, and simultaneously driving the take-up reel to rotate. The rotation of the take-up reel can wind up the pull rope, and after passing through the fixed pulley group, it pulls the roller seat to move in the rolling groove, thereby causing the shading net fixing rod to move the shading net along the length of the greenhouse to the limit plate. The rotating shading net roll facilitates the unwinding of the shading net. Similarly, when shading is not needed, the third motor drives the rotating shaft to reverse, and the reverse rotation of the rotating shaft winds up the shading net, pulling the roller seat to the initial position, and the pull rope on the take-up reel unwinds.

[0044] Working principle: When lamination is required, insert the core of the film roll into the lower limit post and place it on the support platform. Move the adjustable frame and film roll upward so that the upper limit post is inserted into the upper end of the film roll core. Tighten the locking bolt on the adjustable frame, pull out the film, and let one end of the film pass through the first pair of clamping wheels. Then, clamp the upper end of the film with the clamping block. After clamping, install the clamping block on the traction block, and then start the first motor. The first motor drives the belt to move backward, thereby driving the traction block to move in the slide groove of the moving frame. During the movement, the upper end of the film is clamped by the clamping wheels set on the moving frame in sequence. After the traction block reaches the designated position on the rear side, cut the film at the initial position on the front side. Start the second motor, which drives the lead screw to rotate, thereby driving the connecting seat on the lead screw. The rod moves to the left, and the moving seat moves the moving frame to the left side of the greenhouse. After moving to the designated position, the film on the right side adheres to the greenhouse due to its own weight. Then, the film clamp (the existing film clamping frame) is used to press the lower end of the film on the right side onto the greenhouse. After pressing, the electric telescopic rod is activated. The moving end of the electric telescopic rod drives the pressure plate to move downward and then abut against the upper side of the film. The suction cups on the pressure plate can adsorb the film under pressure, thus continuing to drive the film downward and detaching it from the clamping wheel. Then, the left side of the film contacts the greenhouse body, and the film clamp is used to press the left side of the film onto the greenhouse. Then, the electric telescopic rod is retracted, thus completing the film covering work on the top of the greenhouse.

[0045] When shading is needed, the third motor starts, driving the shading net roll on the rotating shaft to rotate, and simultaneously driving the take-up reel to rotate. The rotation of the take-up reel can wind up the pull rope, and after passing through the fixed pulley group, it pulls the roller seat to move in the rolling groove, thereby causing the shading net fixing rod to move the shading net along the length of the greenhouse to the limit plate. The rotating shading net roll facilitates the unwinding of the shading net. Similarly, when shading is not needed, the third motor drives the rotating shaft to reverse, and the reverse rotation of the rotating shaft winds up the shading net, pulling the roller seat to the initial position, and the pull rope on the take-up reel unwinds.

[0046] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A greenhouse covering device, installed outside the greenhouse, characterized in that, include: A traction frame, which is erected on the outside of the greenhouse; A film traction assembly, comprising a movable frame, a drive mechanism for moving the movable frame, and a mechanism for... The device includes a clamping and traction mechanism for clamping and pulling one end of a film and a support mechanism for vertically placing the film roll. The movable frame is movably mounted on the traction frame via the drive mechanism. The clamping and traction mechanism includes a power source, a traction block, and a clamping block. The traction block is fixedly mounted on the power source and has a first mounting hole. The clamping block has a clamping end for clamping one end of the film and a mounting end for mounting in the first mounting hole of the traction block. After the film is clamped, the mounting end is inserted into the first mounting hole. The moving direction of the movable frame is perpendicular to the moving direction of the clamping block. The greenhouse is also equipped with shading components for sun protection. The mobile frame has a slide groove with a T-shaped cross-section. The power source includes a first motor, a belt, and a set of synchronous pulleys. The belt passes through the slide groove in a ring shape via the set of synchronous pulleys, passes over the mobile frame, and then rests in the slide groove. The traction block is located in the slide groove and is fixedly connected to the belt. The first motor is fixedly installed above the mobile frame and cooperates with the belt through the set of synchronous pulleys. The drive mechanism includes a connecting seat, a roller, a second motor, and a lead screw. The second motor is fixedly mounted on the traction frame, and the lead screw is rotatably mounted on the traction frame. The connecting seat has a threaded hole and is screwed onto the lead screw through the threaded hole. The lower end of the connecting seat is fixedly mounted on the upper end of the movable frame. The roller is rotatably mounted in the connecting seat and rolls with the upper end of the traction frame. The output end of the second motor is connected to one end of the lead screw. A film pressing mechanism is also provided on one side of the traction frame. The film pressing mechanism includes a mounting frame, a connecting plate, an electric telescopic rod, and a pressure plate. The mounting frame is fixedly installed on the traction frame. The fixed end of the electric telescopic rod is fixedly installed on the mounting frame. The movable end of the electric telescopic rod moves vertically downward. The connecting plate is fixedly installed at the top of the movable end of the electric telescopic rod. The pressure plate is rotatably installed below the connecting plate. Several suction cups are linearly arranged on the side of the pressure plate that contacts the film.

2. The greenhouse film covering device according to claim 1, characterized in that: The support mechanism is located on one side of the traction frame and includes an upper limit column, a lower limit column, a support platform, and an adjustable frame. The upper limit column is rotatably mounted on the traction frame via a mounting bracket. The support platform is fixedly mounted on the lower end of the lower limit column. The lower limit column portion below the support platform rotates on the adjustable frame via a rolling bearing. The adjustable frame is vertically adjustable and mounted on the traction frame, and is locked in place by bolts. The upper limit column and the lower limit column are collinear and perpendicularly arranged.

3. The greenhouse film covering device according to claim 1, characterized in that: An auxiliary mechanism for assisting in clamping the film is provided below the movable frame. The auxiliary mechanism is linearly arranged on the movable frame and includes symmetrically arranged brackets, clamping wheels and elastic elements. The brackets are symmetrically installed below the movable frame. The clamping wheels are rotated and installed on the side of the brackets close to each other through the elastic elements, and the symmetrical clamping wheels abut against each other. The clamping wheels are located below the clamping block.

4. A greenhouse film covering device according to claim 1, characterized in that: A track is horizontally arranged above the traction frame along the width of the greenhouse. A limiting platform is provided in the middle of the track. Each track is provided with a roller and a connecting seat. The roller has a recess that cooperates with the limiting platform of the track. The traction block has a second mounting hole. A universal ball bearing that provides auxiliary support to the traction block is installed in the second mounting hole. The universal ball bearing rolls in a groove.

5. A greenhouse film covering device according to claim 1, characterized in that: The shading assembly includes a shading net roll, a placement seat, and a roll-up / unrolling mechanism. The roll-up / unrolling mechanism includes a rotating shaft, a third motor, a second synchronous pulley set, a third synchronous pulley set, and a rope pulling mechanism. The placement seat is fixedly installed on the greenhouse. The rotating shaft is fixedly inserted into the core of the shading net roll and is rotatably mounted on the placement seat. The third motor is fixedly installed on the placement seat and is connected to one end of the rotating shaft through the second synchronous pulley set. The rope pulling mechanism is connected to one end of the rotating shaft through the third synchronous pulley set.

6. A greenhouse film covering device according to claim 5, characterized in that: The rope-pulling mechanism includes a shade net fixing rod, a roller frame, a roller seat, a pull rope, a fixed pulley group, and a winding reel. The roller frame is fixedly installed inside the greenhouse along the length of the greenhouse. The roller frame has a rolling groove, and the rollers of the roller seat roll in the rolling groove. The winding reel is vertically rotatably installed on the outside of the placement seat and connected to the rotating shaft through the third synchronous pulley group. The shade net fixing rod is fixedly installed above the roller seat and is arranged along the width of the greenhouse. The outer end of the shade net roll is fixedly connected to the shade net fixing rod. The fixed pulley group is fixedly installed on the roller frame and inside the greenhouse. After passing through the fixed pulley group, the two ends of the pull rope are respectively fixedly connected to the roller seat and the winding reel.

7. A greenhouse covering device according to claim 6, characterized in that, The top of the greenhouse is arc-shaped, and rolling tubes are rotatably installed between the frames. The rolling tubes are evenly distributed on the top of the greenhouse, and the tangent of the surface of the rolling tubes is higher than the tangent of the top of the greenhouse.

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