Automatic folding and unfolding device for greenhouse sunshade net and use method

Abstract

The present application relates to the technical fields of seedling greenhouse, and disclose a kind of automatic folding and unfolding device of greenhouse sunshade net and use method, including left and right two rows and front and back equidistant distribution channel steel column, fastening assembly is arranged in the upper portion of channel steel column and can be adjusted height up and down;The top of left and right two groups of fastening assembly is connected with film arch strut, and automatic folding and unfolding assembly is clamped after being stretched out through the inside of channel steel column on the inside end of fastening assembly, and the top between left and right two groups of automatic folding and unfolding assembly is slid with sunshade net component;The automatic folding and unfolding device of greenhouse sunshade net of the present application can control the folding degree of sunshade net component by servo motor.When the intensity of illumination exceeds the suitable range of shade-tolerant seedling, servo motor is automatically started, drive conveyor belt to drive sunshade net cloth to unfold quickly, realize accurate shade, the automatic folding and unfolding device of greenhouse sunshade net of the present application adopts multiple fastening structure, ensure the firmness after assembly, and reduce assembly difficulty.

Description

Technical Field

[0001] This invention relates to the field of seedling greenhouse technology, specifically to an automatic shading net deployment and retraction device for greenhouses and its usage method. Background Technology

[0002] In forest tree breeding and seedling cultivation, light intensity has a crucial impact on seedling growth, survival rate, and quality. Different species of forest tree seedlings have significantly different light requirements. For example, shade-tolerant species such as Korean pine and spruce require 50%-70% shading during the seedling stage; excessive sunlight can easily lead to leaf burn and excessive water evaporation, affecting photosynthesis. Conversely, light-loving species such as eucalyptus and poplar require ample sunlight during their rapid growth period; excessive shading can cause seedlings to grow excessively tall and have weak stems. Especially during summer seedling cultivation, forest tree seedlings are more sensitive to light and require flexible shading adjustments.

[0003] The assembly performance of greenhouse shading netting devices plays a crucial role in the efficiency of greenhouse construction and its long-term stability. However, existing greenhouse shading netting devices have significant shortcomings in terms of assembly strength and ease of use.

[0004] In terms of assembly stability, some traditional shade net devices use simple buckles or ropes to connect the components. Under severe weather conditions such as strong winds and heavy rain, the connections are prone to loosening or even falling off, causing the shade net to malfunction.

[0005] Regarding ease of assembly, existing devices are typically complex in structure, requiring high precision in the installation and fitting of components. This necessitates professional personnel using various tools, making the installation process cumbersome and time-consuming. For example, some devices involve more than ten steps in the installation of their transmission system and support structure, with strict requirements on the installation sequence; even slight errors can cause the entire device to malfunction. Some greenhouse shading net devices also face challenges during disassembly and maintenance, such as difficult component separation and easily damaged parts. This not only increases labor costs but also reduces equipment efficiency, failing to meet the demands of modern agriculture for rapid setup and flexible adjustment. Therefore, we are introducing an automatic greenhouse shading net deployment and retraction device and its usage method. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic retraction and deployment device for greenhouse shading nets and a method for using it, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic retraction and deployment device for greenhouse shading nets, comprising channel steel columns arranged in two rows on the left and right with equal spacing in front and behind, wherein the upper part of the channel steel columns is provided with a fastening component that can be adjusted up and down;

[0008] A membrane arch support is connected between the tops of the two sets of fastening components on the left and right. The inner end of the fastening component extends through the inner side of the channel steel column and is snapped into an automatic retractable component. A shade net component is slidably connected to the top between the two sets of automatic retractable components on the left and right.

[0009] After the fastening assembly is locked inside the upper part of the channel steel column, the top of the fastening assembly clamps and fixes the bottom of the membrane arch support. At the same time, the inner end of the fastening assembly will automatically retract and position the fastening assembly.

[0010] The shade net assembly is retracted and extended under the drive of the automatic retraction and extension component.

[0011] Preferably, the inner side of the channel steel column is provided with a vertical groove, the upper side of the front and rear walls of the vertical groove is provided with a snap-fit ​​groove, the upper part of the inner side of the vertical groove is fixed with a limit plate by screws, and the middle part of the limit plate is provided with a vertical limit groove.

[0012] Preferably, the fastening assembly includes a T-shaped slide block that slides in a vertical groove, a positioning post at the top of the outer end of the T-shaped slide block, clamping and positioning parts on both sides of the outer end of the T-shaped slide block, a stopper inside the outer end of the T-shaped slide block, and a screw at the inner end of the T-shaped slide block.

[0013] The screw is screwed to the bottom of the inner end of the abutment;

[0014] The top of the outer end of the T-shaped slide is provided with a rotating clamping element that engages with the top of the clamping and positioning element;

[0015] The inner end of the T-shaped slide extends through a vertical limiting groove, and the upper part of the inner end of the T-shaped slide is provided with a reserved groove for engaging the bottom of the automatic retraction component.

[0016] After the screw is tightened, the abutment moves inward, pushing out the locking and positioning part and locking it with the locking groove. Rotating the locking part will lock and fix the bottom of the film arch support part. At the same time, the inner end of the abutment is inserted into the positioning groove at the bottom of the automatic retraction component.

[0017] Preferably, the T-shaped slide has side grooves on both sides of its outer end, a central slot for inserting abutment in the middle of the T-shaped slide, and a side slot communicating with the central slot in the middle of the side groove.

[0018] The clamping and positioning component includes a clamping rack and an insert block disposed in the middle of the clamping rack. The end of the insert block is inserted into the middle slot via a side slot, and the end of the insert block is provided with a contact bevel.

[0019] The abutting component includes an abutting head, a snap-fit ​​block provided on the inner end of the abutting head, and an abutting inclined surface provided at the connection between the abutting head and the snap-fit ​​block. The contact inclined surface contacts the corresponding abutting inclined surface. The bottom of the snap-fit ​​block is provided with a notch. The bottom of the reserved groove is connected to the middle slot. The screw is screwed to the outer wall of the notch.

[0020] The rotating clamping component includes an intermediate toothed ring fitted at the bottom of the positioning column, two sets of drive gears movably connected to the top of the outer end of the T-shaped slide by a vertical shaft, and a clamping plate fixed to the top of the drive gears. The two sets of drive gears mesh with the front and rear sides of the intermediate toothed ring.

[0021] The top of the outer end of the T-shaped slide is also provided with a drive rack, which meshes with the left and right sides of the middle toothed ring.

[0022] Preferably, the membrane arch support includes a central arc-shaped hollow tube, vertical hollow tubes at the bottom of both ends of the central arc-shaped hollow tube, and a flange ring seat at the bottom of the vertical hollow tube, wherein the central arc-shaped hollow tube, the vertical hollow tube, and the flange ring seat are integrally formed.

[0023] The height of the drive gear is higher than the height of the intermediate gear ring, and the outer diameter of the intermediate gear ring is greater than the outer diameter of the drive gear. The outer diameter of the flange ring seat is smaller than the outer diameter of the intermediate gear ring.

[0024] The clamping plate is used to clamp onto the top of the flange ring seat, and the positioning pin is used to insert into the vertical hollow tube.

[0025] Preferably, the upper and lower ends of the clamping rack are connected to the side groove by tension springs.

[0026] Preferably, the automatic retraction and extension assembly includes a vertical plate that is locked in a reserved slot, a horizontal plate that is fixed to the inner side of the top of the vertical plate, an extension plate that is set on the inner side of the front end of the horizontal plate, and a servo motor installed at the top of the front end of the horizontal plate.

[0027] The front inner side of the vertical plate is movably connected to the front conveyor belt pulley by the first pin shaft. The inner end of the first pin shaft extends through the extension plate and is fixed to the bottom pulley. The output end of the servo motor is fixed to the top pulley. A belt connects the bottom pulley and the top pulley.

[0028] The rear inner side of the vertical plate is movably connected to the rear conveyor belt pulley by a second pin shaft, and a conveyor belt is connected between the front conveyor belt pulley and the rear conveyor belt pulley.

[0029] Preferably, the shade net assembly includes several sets of sliding plates, several sets of shade netting fabric disposed on the top of the sliding plates, and sliding protrusions symmetrically disposed on the bottom of the sliding plates, wherein the sliding protrusions slide onto the sliding grooves on the horizontal plate.

[0030] The frontmost sliding plate is fixed on the horizontal plate. The upper rear end of the conveyor belt is equipped with two sets of front and rear locking sliders, and the sliding protrusion at the bottom of the rearmost sliding plate is locked between the front and rear locking sliders.

[0031] This invention also provides a method for using an automatic greenhouse shading net deployment and retraction device, specifically including the following steps:

[0032] S1. Place the fastening assembly inside the upper part of the channel steel column, then place the bottom of the membrane arch support on the top of the fastening assembly, and snap the automatic retraction assembly into the inner end of the fastening assembly.

[0033] S2. Then, the fastening assembly is locked inside the upper part of the channel steel column. The top of the fastening assembly clamps and fixes the bottom of the membrane arch support. At the same time, the inner end of the fastening assembly will position and clamp the automatic retractable assembly.

[0034] S3. Install the shade net assembly on top between the left and right sets of automatic retraction components. The shade net assembly retracts and extends under the drive of the automatic retraction components.

[0035] Compared with the prior art, the beneficial effects of the present invention are: the automatic shading net retraction and extension device of the present invention can control the degree of retraction and extension of the shading net components through a servo motor. When the light intensity exceeds the suitable range for shade-tolerant seedlings, the servo motor will start automatically and drive the conveyor belt to quickly unfold the shading net, so as to achieve precise shading; for light-loving seedlings during the critical growth period, the shading net can be retracted in time to ensure sufficient light.

[0036] The automatic retraction and extension device for greenhouse shading nets of this invention employs a multi-layered fastening structure to ensure the robustness of the assembled structure. In the fastening components, the locking rack engages with the channel steel column via a locking groove, and the screw-driven abutment mechanism provides a double locking mechanism, ensuring a stable connection between the fastening components and the channel steel column. This connection can withstand significant external forces without loosening. Even in winds exceeding level 5, this connection structure remains stable, guaranteeing the overall safety of the device.

[0037] The rotating clamping component, through the meshing of the drive gear and the intermediate gear ring, drives the clamping plate to firmly clamp the flange ring seat of the film arch support. The synchronous rotation of the two sets of drive gears ensures even pressure distribution, preventing the film arch support from tilting or loosening. The positioning post is inserted into the vertical hollow tube to limit the radial displacement of the film arch support, further enhancing the connection stability. Even under snow load, it ensures a stable connection between the film arch support and the fastening components, maintaining the normal supporting function of the greenhouse film.

[0038] The bottom of the automatic retraction component precisely engages with the inner end of the abutment through a positioning groove, combined with a pre-drilled slot, ensuring stable and reliable operation of the shade net during retraction and deployment. This effectively prevents equipment malfunctions caused by loose components. The device employs a modular design, with each component—such as the fastening component, membrane arch support, automatic retraction component, and shade net component—being independent and having standardized interfaces, significantly reducing assembly difficulty. During installation, simply inserting the T-shaped slide of the fastening component into the vertical slot of the channel steel column achieves initial positioning, eliminating the need for complex calibration. The entire installation process is simple and intuitive, requiring only minimal training for ordinary personnel. During disassembly and maintenance, each component can be quickly separated, facilitating the replacement of damaged parts and greatly improving maintenance efficiency while reducing operating costs. Attached Figure Description

[0039] Figure 1 This is an exploded structural diagram of the overall assembly of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the thin-film arch support of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of the shading net assembly of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of the automatic retraction and extension component of the present invention;

[0043] Figure 5 This is an exploded structural diagram of the assembly of the conveyor belt, front conveyor belt pulley and rear conveyor belt pulley of the present invention;

[0044] Figure 6 For the present invention Figure 4 A schematic diagram of the three-dimensional structure from another perspective;

[0045] Figure 7 This is an exploded structural diagram of the fastening components and channel steel column assembly of the present invention;

[0046] Figure 8 This is an exploded structural diagram of the fastening assembly of the present invention;

[0047] Figure 9 This is an exploded structural diagram showing the connection between the clamping and positioning component and the abutment component of the present invention;

[0048] Figure 10 This is a three-dimensional structural diagram of the fastening assembly in its initial state according to the present invention;

[0049] Figure 11 This is a three-dimensional structural diagram of the assembly of the thin-film arch support and fastening components of the present invention;

[0050] Figure 12This is a cross-sectional view of the connection between the thin-film arch support and the fastening assembly of the present invention.

[0051] Figure 13 This is a three-dimensional structural diagram of the assembly of the membrane arch support, automatic retraction component, channel steel column and fastening component of the present invention;

[0052] Figure 14 This is a cross-sectional view of the connection between the vertical plate and the fastening assembly of the present invention.

[0053] Figure 15 This is a three-dimensional structural diagram of the connection between the shading net assembly and the automatic retraction assembly of the present invention.

[0054] Figure 16 For the present invention Figure 15 Schematic diagram of the cross-sectional structure at point AA;

[0055] Figure 17 This is a schematic diagram of the overall three-dimensional structure of the shading net assembly of the present invention after it is unfolded.

[0056] In the picture:

[0057] 1. Membrane arch support; 101. Intermediate arc-shaped hollow tube; 102. Vertical hollow tube; 103. Flange ring seat;

[0058] 2. Shade net assembly; 201. Shade net fabric; 202. Sliding plate; 203. Sliding protrusion;

[0059] 3. Automatic unfolding and retracting components; 301. Vertical plate; 302. Horizontal plate; 303. Sliding groove; 304. Rear conveyor pulley; 305. Conveyor belt; 306. Snap-fit ​​slider; 307. Servo motor; 309. Pulley; 310. Belt; 311. Front conveyor pulley; 312. Positioning groove; 313. Extension plate;

[0060] 4. Channel steel column; 401. Vertical slot; 402. Snap-fit ​​slot; 403. Limiting plate; 404. Vertical limiting slot; 405. Screw;

[0061] 5. Fastening components; 501. T-shaped slide; 502. Reserved slot; 503. Screw; 504. Side slot; 505. Side slot; 506. Middle slot; 507. Positioning pin; 508. Middle gear ring; 509. Clamping rack; 510. Insert block; 511. Contact slope; 512. Tension spring; 513. Drive rack; 514. Drive gear; 515. Clamping plate; 516. Vertical shaft; 517. Abutment head; 518. Abutment slope; 519. Clamping block; 520. Notch slot. Detailed Implementation

[0062] 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.

[0063] Example:

[0064] Please see Figure 1-17 The present invention provides a technical solution:

[0065] An automatic retraction and deployment device for greenhouse shade netting includes channel steel columns 4 arranged in two rows on the left and right with equal spacing in front and behind;

[0066] The inner side of the channel steel column 4 is provided with a vertical groove 401. The upper side of the front and rear walls of the vertical groove 401 is provided with a snap-fit ​​groove 402. The upper part of the inner side of the vertical groove 401 is fixed with a limit plate 403 by screws 405. The middle part of the limit plate 403 is provided with a vertical limit groove 404.

[0067] Two rows of channel steel columns 4, evenly spaced front to back, form the foundation of the entire device and are firmly fixed to the ground on both sides of the greenhouse with anchor bolts. The vertical groove 401, snap-fit ​​groove 402, limiting plate 403, and vertical limiting groove 404 on the inner side of the channel steel columns 4 constitute the track and limiting structure for the subsequent installation and operation of components, ensuring the stability and accuracy of the overall device.

[0068] The upper part of the channel steel column 4 is equipped with a fastening component 5 that can be adjusted vertically;

[0069] The fastening assembly 5 includes a T-shaped slide block 501 that slides in the vertical groove 401, a positioning post 507 at the top of the outer end of the T-shaped slide block 501, a clamping positioning member on both sides of the outer end of the T-shaped slide block 501, a backing member inside the outer end of the T-shaped slide block 501, and a screw 503 at the inner end of the T-shaped slide block 501.

[0070] Screw 503 is screwed to the bottom of the inner end of the abutment;

[0071] The top of the outer end of the T-shaped slide block 501 is provided with a rotating clamping element that engages with the top of the clamping and positioning element;

[0072] The inner end of the T-shaped slide block 501 extends through the vertical limiting groove 404, and the upper part of the inner end of the T-shaped slide block 501 is provided with a reserved groove 502 for engaging the bottom of the automatic retraction component 3.

[0073] After the screw 503 is locked, the abutment moves inward, pushes out the locking and positioning part and locks it with the locking groove 402. Rotating the locking part locks and fixes the bottom of the film arch support 1. At the same time, the inner end of the abutment is inserted into the positioning groove 312 at the bottom of the automatic retraction component 3.

[0074] Insert the T-shaped slide 501 of the fastening component 5 into the vertical groove 401 of the channel steel column 4. At this time, the T-shaped slide 501 can slide up and down along the vertical groove 401, realizing flexible adjustment of the height of the fastening component 5 on the channel steel column 4 to adapt to the height requirements of different greenhouses. The inner end of the T-shaped slide 501 extends through the vertical limiting groove 404, and the reserved groove 502 at the top is used for subsequent locking of the bottom of the automatic retraction component 3.

[0075] The T-shaped slide block 501 has side grooves 504 on both sides of its outer end, and a middle slot 506 for inserting abutment in the middle of the T-shaped slide block 501. The side groove 504 has a side slot 505 in the middle that communicates with the middle slot 506.

[0076] The clamping and positioning component includes a clamping rack 509 and an insert 510 disposed in the middle of the clamping rack 509. The end of the insert 510 is inserted into the middle slot 506 through the side slot 505, and the end of the insert 510 is provided with a contact slope 511.

[0077] The abutting component includes an abutting head 517, a snap-fit ​​block 519 provided on the inner end of the abutting head 517, and an abutting slope 518 provided at the connection between the abutting head 517 and the snap-fit ​​block 519. The contact slope 511 contacts the corresponding abutting slope 518. The bottom of the snap-fit ​​block 519 is provided with a notch 520. The bottom of the reserved groove 502 is connected to the middle slot 506. The screw 503 is screwed to the outer wall of the notch 520.

[0078] The rotating clamping component includes an intermediate toothed ring 508 fitted at the bottom of the positioning post 507, two sets of drive gears 514 movably connected to the top of the outer end of the T-shaped slide block 501 by a vertical shaft 516, and a clamping plate 515 fixed to the top of the drive gears 514. The two sets of drive gears 514 mesh with the front and rear sides of the intermediate toothed ring 508.

[0079] The top of the outer end of the T-shaped slide block 501 is also provided with a drive rack 513, which meshes with the left and right sides of the intermediate toothed ring 508.

[0080] The height of the drive gear 514 is higher than the height of the intermediate gear ring 508, the outer diameter of the intermediate gear ring 508 is greater than the outer diameter of the drive gear 514, and the outer diameter of the flange ring seat 103 is smaller than the outer diameter of the intermediate gear ring 508.

[0081] The clamp 515 is used to clamp onto the top of the flange ring seat 103.

[0082] The positioning post 507 is used to be inserted into the vertical hollow tube 102 to limit the radial displacement of the membrane arch support 1, prevent the membrane arch support 1 from swinging left and right due to wind force, and ensure uniform membrane tension.

[0083] Installation guidance function: When the positioning column 507 is inserted into the vertical hollow tube 102, it can guide the membrane arch support 1 to be accurately aligned, reduce the positioning error during installation, and improve the snap-fit ​​efficiency between the clamping plate 515 and the flange ring seat 103.

[0084] The upper and lower ends of the clamping rack 509 are connected to the side groove 504 by tension springs 512.

[0085] Automatic reset function: When the screw 503 is loosened, the elastic tension of the tension spring 512 can drive the locking rack 509 to retract automatically, preventing the locking rack 509 from being stuck in the locking groove 402 due to friction or external force, which facilitates the disassembly and height adjustment of the fastening component 5 and improves the convenience of maintenance.

[0086] Shock absorption: During the locking process of screw 503, tension spring 512 can absorb the impact force when the rack 509 is engaged with the slot 402, reduce mechanical wear, and extend the service life of the component.

[0087] Height adjustment and initial positioning: According to the height requirements of the greenhouse, slide the fastening component 5 to a suitable position on the upper part of the channel steel column 4. At this time, the inner end of the T-shaped slide 501 extends through the vertical limiting groove 404 to ensure the stability of the T-shaped slide 501 sliding in the vertical direction.

[0088] Screw 503 drives the abutment: Rotating screw 503 clockwise causes the abutment to move inward because screw 503 is screwed to the outer wall of the notch 520 of the abutment.

[0089] When the abutment moves inward, the abutment slope 518 contacts the contact slope 511 of the locking positioning component, pushing the insert block 510 to drive the locking rack 509 to move outward. Finally, the locking rack 509 is locked with the locking groove 402 of the channel steel column 4, realizing the locking and fixing of the fastening component 5 on the channel steel column 4.

[0090] Rotating the clamping device to fix the film arch support 1: As the clamping rack 509 moves outward, the drive rack 513 at the top of the clamping rack 509 meshes with the intermediate gear ring 508, causing the intermediate gear ring 508 to rotate. The drive gear 514, which meshes with the front and rear sides of the intermediate gear ring 508, rotates under the drive of the intermediate gear ring 508. The clamping plate 515 at the top of the drive gear 514 rotates accordingly. Finally, the clamping plate 515 is clamped on the top of the flange ring seat 103 of the film arch support 1, clamping and fixing the bottom of the film arch support 1.

[0091] The two sets of drive gears 514 rotate synchronously to ensure that the clamping plate 515 applies uniform pressure to the flange ring seat 103 of the membrane arch support 1, thereby avoiding tilting or loosening of the membrane arch support 1 due to unilateral force and improving the fixing stability.

[0092] Transmission accuracy is guaranteed: The gear meshing transmission has a low error rate, which can ensure the consistency of the rotation angle of the clamping plate 515 and avoid the clamping plate 515 and the flange ring seat 103 not being properly engaged due to transmission deviation, thus ensuring the installation accuracy of the membrane arch support 1.

[0093] Positioning of the automatic retractable component 3: The inner end of the abutment is inserted into the positioning groove 312 at the bottom of the automatic retractable component 3 to complete the positioning and locking of the automatic retractable component 3.

[0094] A membrane arch support 1 is connected between the tops of the two sets of fastening components 5 on the left and right sides;

[0095] The membrane arch support 1 includes a central arc-shaped hollow tube 101, vertical hollow tubes 102 at the bottom of both ends of the central arc-shaped hollow tube 101, and a flange ring seat 103 at the bottom of the vertical hollow tube 102. The central arc-shaped hollow tube 101, the vertical hollow tube 102 and the flange ring seat 103 are integrally formed.

[0096] Supporting the greenhouse film: The central arc-shaped hollow tube 101, the vertical hollow tube 102, and the flange ring seat 103 are integrally formed to constitute the film arch support component 1. Its arc-shaped design meets the arched structure requirements of the greenhouse, providing stable and uniform support for the greenhouse film. In actual use, this arc-shaped support can disperse the pressure on the film. Whether it is the weight of accumulated snow or the force of strong winds, it can be evenly transmitted to the supporting structure such as the channel steel column 4 through the arc-shaped structure, preventing the film from being damaged due to excessive local stress, ensuring the airtightness and heat preservation of the greenhouse, and creating a stable environment for crop growth.

[0097] Easy installation and fixation: The vertical hollow tubes 102 at both ends of the central arc-shaped hollow tube 101 and the flange ring seat 103 allow the membrane arch support 1 to precisely engage with the fastening assembly 5. The outer diameter of the flange ring seat 103 is smaller than the outer diameter of the central toothed ring 508, and the clamping plate 515 can be clamped onto the top of the flange ring seat 103. This design facilitates the secure installation of the membrane arch support 1 onto the channel steel column 4 using the fastening assembly 5. During installation, simply place the bottom of the membrane arch support 1 on top of the fastening assembly 5 and then tighten the screw 503. This allows for quick and secure fixing of the rotating clamping component, improving installation efficiency and facilitating subsequent disassembly and maintenance.

[0098] The hollow structure and reasonable layout of the central arc-shaped hollow tube 101 do not hinder the opening and closing of the shade net assembly 2. Driven by the automatic opening and closing assembly 3, the shade net assembly 2 slides within the sliding groove 303 of the horizontal plate 302 via the sliding protrusion 203 at the bottom of the sliding plate 202 to achieve the opening and closing action. The position and shape design of the central arc-shaped hollow tube 101 ensures that it will not interfere with the shade net assembly 2 and the automatic opening and closing assembly 3, ensuring that the shade net 201 can be smoothly opened to cover the top of the greenhouse, or retracted for ventilation, lighting, and other operations, so that the function of the automatic opening and closing device for the greenhouse shade net can be effectively realized.

[0099] The inner end of the fastening component 5 extends through the inner side of the channel steel column 4 and is then snapped into the automatic retraction component 3.

[0100] The automatic retraction and extension assembly 3 includes a vertical plate 301 that is locked in the reserved slot 502, a horizontal plate 302 fixed to the inner side of the top of the vertical plate 301, an extension plate 313 provided on the inner side of the front end of the horizontal plate 302, and a servo motor 307 installed on the top of the front end of the horizontal plate 302.

[0101] The front inner side of the vertical plate 301 is movably connected to the front conveyor pulley 311 by the first pin shaft. The inner end of the first pin shaft extends through the extension plate 313 and is fixed to the bottom pulley 309. The output end of the servo motor 307 is fixed to the top pulley 309. A belt 310 is connected between the bottom pulley 309 and the top pulley 309.

[0102] The rear inner side of the vertical plate 301 is movably connected to the rear conveyor pulley 304 by a second pin shaft, and the front conveyor pulley 311 and the rear conveyor pulley 304 are connected by a conveyor belt 305.

[0103] A shade net assembly 2 is slidably connected at the top between the two sets of automatic retractable components 3 on the left and right sides;

[0104] Shading net assembly 2 includes several sets of sliding plates 202, several sets of shading net fabric 201 provided on the top of the sliding plates 202, and sliding protrusions 203 symmetrically provided on the left and right sides of the bottom of the sliding plates 202. The sliding protrusions 203 slide in the sliding grooves 303 on the horizontal plate 302.

[0105] The frontmost sliding plate 202 is fixed on the horizontal plate 302. The upper rear part of the conveyor belt 305 is provided with two sets of front and rear locking sliders 306, and the sliding protrusion 203 at the bottom of the rearmost sliding plate 202 is locked between the front and rear sets of locking sliders 306.

[0106] Shade net deployment and retraction process:

[0107] Servo motor 307 drive: Start the servo motor 307 of the automatic retraction component 3. The top pulley 309 at the output end of the servo motor 307 rotates, which drives the bottom pulley 309 to rotate through the belt 310.

[0108] Conveyor belt 305 drive: The bottom pulley 309 drives the front conveyor pulley 311 to rotate through the first pin, and the conveyor belt 305 between the front conveyor pulley 311 and the rear conveyor pulley 304 runs accordingly.

[0109] Shading netting 201 unfolding and retracting: The locking slider 306 at the upper rear of the conveyor belt 305 drives the sliding plate 202 at the rear end to slide back and forth in the sliding groove 303 of the horizontal plate 302, thereby realizing the unfolding or retraction of the shading netting assembly 2. When the servo motor 307 rotates forward, the shading netting 201 unfolds to cover the top of the greenhouse; when it rotates in reverse, the shading netting 201 retracts.

[0110] After the fastening component 5 is locked inside the upper part of the channel steel column 4, the top of the fastening component 5 clamps and fixes the bottom of the membrane arch support 1. At the same time, the inner end of the fastening component 5 will position and clamp the automatic retractable component 3.

[0111] Shading net component 2 is retracted and extended under the drive of automatic retraction component 3.

[0112] This invention also provides a method for using an automatic greenhouse shading net deployment and retraction device, specifically including the following steps:

[0113] S1. Set the fastening component 5 inside the upper part of the channel steel column 4, then set the bottom of the membrane arch support 1 on the top of the fastening component 5, and snap the automatic retraction component 3 into the inner end of the fastening component 5.

[0114] S2. Then, the fastening component 5 is locked inside the upper part of the channel steel column 4. The top of the fastening component 5 clamps and fixes the bottom of the membrane arch support 1. At the same time, the inner end of the fastening component 5 positions and clamps the automatic retractable component 3.

[0115] S3. Install the shade net assembly 2 on top between the two sets of automatic retraction and extension assemblies 3 on the left and right sides. The shade net assembly 2 retracts and extends under the drive of the automatic retraction and extension assemblies 3.

[0116] Unfolding process:

[0117] When the servo motor 307 rotates forward, the conveyor belt 305 moves forward, and the locking slider 306 pushes the last sliding plate 202 to slide forward along the sliding groove 303 of the horizontal plate 302. Since the frontmost sliding plate 202 is fixed on the horizontal plate 302, the middle sliding plate 202 slides in the sliding groove 303 through the sliding protrusion 203, finally allowing the shade netting 201 to fully unfold from front to back, covering the top of the greenhouse.

[0118] Collapse process:

[0119] When the servo motor 307 reverses, the conveyor belt 305 runs backward, and the locking slider 306 pulls the sliding plate 202 at the last end to slide backward. The shade net 201 is folded up with the sliding plate 202 and finally stacked on one side of the front of the greenhouse, exposing the top film for ventilation or lighting.

[0120] Specifically, when using it:

[0121] Basic setup and component installation:

[0122] Fixed channel steel columns 4: The channel steel columns 4, arranged in two rows on the left and right with equal spacing in front and behind, serve as the foundation of the entire device and are firmly fixed to the ground on both sides of the greenhouse by anchor bolts.

[0123] Install fastening component 5: Insert the T-shaped slide 501 of fastening component 5 into the vertical groove 401 of the channel steel column 4. At this time, the T-shaped slide 501 can slide up and down along the vertical groove 401 to realize the flexible adjustment of the height of fastening component 5 on the channel steel column 4 to adapt to the height requirements of different greenhouses.

[0124] Install the membrane arch support 1 and the automatic retraction assembly 3: Place the flange ring seat 103 at the bottom of the membrane arch support 1 on the top of the fastening assembly 5 so that the positioning post 507 is inserted into the vertical hollow tube 102.

[0125] The bottom of the automatic retractable component 3 is inserted into the reserved slot 502, completing the initial installation and positioning of these two key components.

[0126] Connecting the shade net assembly 2: Slide the bottom sliding protrusion 203 of the sliding plate 202 of the shade net assembly 2 into the sliding groove 303 of the horizontal plate 302 of the automatic retraction assembly 3. The frontmost sliding plate 202 is fixed on the horizontal plate 302, and the bottom sliding protrusion 203 of the rearmost sliding plate 202 is engaged between the locking slider 306 at the rear of the upper end of the conveyor belt 305, so that the shade net assembly 2 and the automatic retraction assembly 3 are connected.

[0127] Locking and securing of fastening component 5:

[0128] Height adjustment and positioning: Based on the actual height of the greenhouse, slide the fastening component 5 to a suitable position on the upper part of the channel steel column 4. Under the limit of the vertical limiting groove 404, the inner end of the T-shaped slide block 501 ensures stable sliding in the vertical direction and accurate positioning.

[0129] Screw 503 drives the abutment: Rotating screw 503 clockwise causes the abutment to move inward as it is screwed to the outer wall of the notch 520 of the abutment.

[0130] When the abutment moves inward, the abutment slope 518 contacts the contact slope 511 of the locking positioning component, pushing the insert block 510 to drive the locking rack 509 to move outward. Finally, the locking rack 509 is locked with the locking groove 402 of the channel steel column 4, realizing the firm locking of the fastening component 5 on the channel steel column 4.

[0131] Rotating the clamping device to fix the film arch support 1: When the clamping rack 509 moves outward, the top drive rack 513 meshes with the intermediate gear ring 508, causing the intermediate gear ring 508 to rotate. The intermediate gear ring 508 then drives the drive gear 514 meshing with it to rotate, causing the clamping plate 515 on the top of the drive gear 514 to rotate and clamp onto the top of the flange ring seat 103 of the film arch support 1, thus clamping and fixing the bottom of the film arch support 1.

[0132] Positioning of automatic retractable component 3: Insert the inner end of the abutment into the positioning groove 312 at the bottom of the automatic retractable component 3 to complete the precise positioning and locking of the automatic retractable component 3. At this point, the installation and fixing of each component is complete.

[0133] Automatic retraction and extension of shade netting:

[0134] Servo motor 307 start drive: Start the servo motor 307 of the automatic retraction component 3. The top pulley 309 at the output end of the servo motor 307 starts to rotate, and drives the bottom pulley 309 to rotate through the belt 310.

[0135] Conveyor belt drive: The bottom pulley 309 drives the front conveyor pulley 311 to rotate through the first pin, and the conveyor belt 305 between the front conveyor pulley 311 and the rear conveyor pulley 304 runs accordingly.

[0136] The shading netting 201 is unfolded and retracted by: the locking slider 306 at the upper rear of the conveyor belt 305 drives the sliding plate 202 at the rear end to slide back and forth in the sliding groove 303 of the horizontal plate 302. When the servo motor 307 rotates forward, the conveyor belt 305 drives the shading netting 201 to unfold from front to back, covering the top of the greenhouse; when the servo motor 307 rotates in reverse, the shading netting 201 is retracted from back to front, meeting the different light requirements of the greenhouse.

[0137] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic retraction and deployment device for greenhouse shading nets, comprising channel steel columns arranged in two rows on the left and right sides with equal spacing front and back, characterized in that: The upper part of the channel steel column is equipped with a fastening component that can be adjusted vertically. A membrane arch support is connected between the tops of the two sets of fastening components on the left and right. The inner end of the fastening component extends through the inner side of the channel steel column and is snapped into an automatic retractable component. A shade net component is slidably connected to the top between the two sets of automatic retractable components on the left and right. After the fastening assembly is locked inside the upper part of the channel steel column, the top of the fastening assembly clamps and fixes the bottom of the membrane arch support. At the same time, the inner end of the fastening assembly will automatically retract and position the fastening assembly. The shade net assembly is retracted and extended under the drive of the automatic retraction and extension assembly; The inner side of the channel steel column is provided with a vertical groove, and the upper side of the front and rear walls of the vertical groove is provided with a snap-fit ​​groove. The upper part of the inner side of the vertical groove is fixed with a limit plate by screws, and the middle part of the limit plate is provided with a vertical limit groove. The fastening assembly includes a T-shaped slide block that slides in a vertical groove, a positioning post at the top of the outer end of the T-shaped slide block, clamping and positioning parts on both sides of the outer end of the T-shaped slide block, a stopper inside the outer end of the T-shaped slide block, and a screw at the inner end of the T-shaped slide block. The screw is screwed to the bottom of the inner end of the abutment; The top of the outer end of the T-shaped slide is provided with a rotating clamping element that engages with the top of the clamping and positioning element; The inner end of the T-shaped slide extends through a vertical limiting groove, and the upper part of the inner end of the T-shaped slide is provided with a reserved groove for engaging the bottom of the automatic retraction component. After the screw is tightened, the abutment moves inward, pushes out the locking and positioning part and locks it into the locking groove. Rotating the locking part will lock and fix the bottom of the film arch support part. At the same time, the inner end of the abutment is inserted into the positioning groove at the bottom of the automatic retraction component. The T-shaped slide has side grooves on both sides of its outer end, and a central slot for inserting abutment in the middle of the T-shaped slide. The side grooves have side slots in the middle that communicate with the central slot. The clamping and positioning component includes a clamping rack and an insert block disposed in the middle of the clamping rack. The end of the insert block is inserted into the middle slot via a side slot, and the end of the insert block is provided with a contact bevel. The abutting component includes an abutting head, a snap-fit ​​block provided on the inner end of the abutting head, and an abutting inclined surface provided at the connection between the abutting head and the snap-fit ​​block. The contact inclined surface contacts the corresponding abutting inclined surface. The bottom of the snap-fit ​​block is provided with a notch. The bottom of the reserved groove is connected to the middle slot. The screw is screwed to the outer wall of the notch. The rotating clamping component includes an intermediate toothed ring fitted at the bottom of the positioning column, two sets of drive gears movably connected to the top of the outer end of the T-shaped slide by a vertical shaft, and a clamping plate fixed to the top of the drive gears. The two sets of drive gears mesh with the front and rear sides of the intermediate toothed ring. The top of the outer end of the T-shaped slide is also provided with a drive rack, which meshes with the left and right sides of the middle toothed ring. The membrane arch support includes a central arc-shaped hollow tube, vertical hollow tubes at both ends of the central arc-shaped hollow tube, and flange ring seats at the bottom of the vertical hollow tubes. The central arc-shaped hollow tube, the vertical hollow tubes, and the flange ring seats are integrally formed. The height of the drive gear is higher than the height of the intermediate gear ring, and the outer diameter of the intermediate gear ring is greater than the outer diameter of the drive gear. The outer diameter of the flange ring seat is smaller than the outer diameter of the intermediate gear ring. The clamping plate is used to clamp onto the top of the flange ring seat, and the positioning pin is used to insert into the vertical hollow tube.

2. The automatic retraction and deployment device for greenhouse shading nets according to claim 1, characterized in that: The upper and lower ends of the clamping rack are connected to the side groove by tension springs.

3. The automatic retraction and deployment device for greenhouse shading nets according to claim 1, characterized in that: The automatic retraction and extension assembly includes a vertical plate that is locked in a reserved slot, a horizontal plate that is fixed to the inner side of the top of the vertical plate, an extension plate that is set on the inner side of the front end of the horizontal plate, and a servo motor installed on the top of the front end of the horizontal plate. The front inner side of the vertical plate is movably connected to the front conveyor belt pulley by the first pin shaft. The inner end of the first pin shaft extends through the extension plate and is fixed to the bottom pulley. The output end of the servo motor is fixed to the top pulley. A belt connects the bottom pulley and the top pulley. The rear inner side of the vertical plate is movably connected to the rear conveyor belt pulley by a second pin shaft, and a conveyor belt is connected between the front conveyor belt pulley and the rear conveyor belt pulley.

4. The automatic retraction and deployment device for greenhouse shading nets according to claim 3, characterized in that: The shade net assembly includes several sets of sliding plates, several sets of shade netting fabric on the top of the sliding plates, and sliding protrusions symmetrically arranged on the left and right sides of the bottom of the sliding plates. The sliding protrusions slide into the sliding grooves on the horizontal plate. The frontmost sliding plate is fixed on the horizontal plate. The upper rear end of the conveyor belt is equipped with two sets of front and rear locking sliders, and the sliding protrusion at the bottom of the rearmost sliding plate is locked between the front and rear locking sliders.

5. A method of using the automatic retraction and deployment device for greenhouse shading nets according to any one of claims 1-4, characterized in that: Specifically, the following steps are included: S1. Place the fastening assembly inside the upper part of the channel steel column, then place the bottom of the membrane arch support on the top of the fastening assembly, and snap the automatic retraction assembly into the inner end of the fastening assembly. S2. Then, the fastening assembly is locked inside the upper part of the channel steel column. The top of the fastening assembly clamps and fixes the bottom of the membrane arch support. At the same time, the inner end of the fastening assembly will position and clamp the automatic retractable assembly. S3. Install the shade net assembly on top between the left and right sets of automatic retraction components. The shade net assembly retracts and extends under the drive of the automatic retraction components.

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