Four-section type synchronous internal sunshade device for large-span cold shed

Abstract

The utility model belongs to the technical field of greenhouse intelligent equipment, and discloses a four-section type synchronous inner sunshade device for a large-span cold shed. Comprising a large-span cold shed, a reel, a traction device and a connecting framework, and a sectional type sunshade scheme is provided. The reel rotates to drive the traction steel wire rope to move, so that the sunshade net moves along with the traction steel wire rope. And synchronous folding and unfolding of the four-section type sunshade net in the four areas can be achieved through the two motors. The system is beneficial to illumination regulation and control of the large-span cold shed, the internal environment of the large-span cold shed can be effectively improved, and efficient sunshade is achieved. Meanwhile, the device has the advantages of light weight and simplification, the automation rate of the cold shed is improved, the investment cost is low, and the device has very high popularization and application values.

Description

Technical Field

[0001] The utility model relates to the technical field of greenhouse intelligent equipment, in particular to a four-section synchronous internal sunshade device for large-span cold sheds. Background Art

[0002] Large-span greenhouses are a common type of greenhouse in my country. They are oriented north-south, with small spacing between greenhouses, offering high land utilization and ample interior space. This increases the planting area and facilitates mechanized operation. Their simple main structure allows for quick installation and easy maintenance. While greenhouses have limitations, such as early spring and late autumn, adding insulation blankets can extend production in winter and even allow for overwintering. In summer, opening vents can lower the indoor temperature to near the outdoor temperature, but this still limits the planting and growth of many crops. A greenhouse is a facility used for growing crops, typically constructed of a metal frame and covering material. However, its large span and curved roof make conventional multi-span greenhouse shading systems difficult to implement or require significant construction costs. Shading plays a crucial role in production. Primarily, it provides shading. Shade nets reduce light intensity within the greenhouse. The higher the density, the better the shading. For the same specifications, black provides better shading than silver-gray. Secondly, the greenhouse has a cooling effect. The temperature inside the greenhouse has dropped due to the shade net, and the surface and cultivated soil layers have cooled to an ideal degree. From 10:00 AM to 2:00 PM, the upper greenhouse temperature is 37-40°C, while the surface temperature around the plants is 22-26°C, and the soil temperature is between 18-22°C, which is suitable for crop growth. Finally, it has a moisturizing effect. Evaporation inside the greenhouse is reduced, the soil moisture content is higher than in the open field, and the topsoil is moist. Therefore, the design of shading for large-span greenhouses is a major challenge in production. Designing a shading system for greenhouses can help reduce temperatures, save energy and reduce emissions, improve crop quality, and reduce labor intensity. Therefore, solving the problem of shading for large-span greenhouses is of great significance to the development of facility agriculture and fruit and vegetable production in my country.

[0003] Currently, greenhouse shading is commonly achieved both domestically and internationally through the use of greenhouse coverings, where various textile materials are manually or mechanically applied to the greenhouse to provide shade. This shading method is effective for conventional multi-span greenhouses, but large-span greenhouses, which require high land utilization, have become a growing trend among farmers. Conventional shading devices are ineffective due to their large spans. Some researchers have adopted static shading systems, which are cost-effective but lack the ability to adjust according to actual needs. Others have adopted dynamic shading systems, which are technically demanding and expensive. To address these challenges, this project designed a four-stage synchronous internal shading device for large-span greenhouses. This device achieves efficient and effective shading even for large greenhouse spans, addressing various disadvantages associated with traditional shading systems and increasing the mechanization rate of greenhouse construction. It offers high shading efficiency, a moderate cooling effect, and an improved crop growing environment, meeting project requirements. Utility Model Content

[0004] In order to make up for the deficiencies of the above-mentioned prior art, the purpose of this utility model is to provide a four-stage synchronous internal sunshade device for large-span cold greenhouses, which can be applied to arched solar greenhouses with larger spans to achieve efficient and convenient sunshading of the greenhouse.

[0005] The technical solution of the utility model is as follows: a four-stage synchronous internal sunshade device for a large-span cold shed, comprising a large-span cold shed 1, a winding shaft 2, a traction device 3 and a connecting frame 5;

[0006] The connecting frame 5 includes a crossbeam frame 5-1, a tension beam and a side beam frame 5-2; the crossbeam frame 5-1 is located at the top of the long-span cold shed 1, and the side beam frame 5-2 is located at the bottom of both sides of the long-span cold shed 1; the tension beam is located parallel to the crossbeam frame 5-1 and the side beam frame 5-2;

[0007] The traction devices 3 are provided in pairs and are symmetrically arranged in the large-span cold shed 1, with a winding shaft 2 connected to each end thereof;

[0008] The traction device 3 includes a traction motor 3-1, a fixed pulley 3-2, a traction wire rope 3-3, a sunshade net 3-4, and a plurality of curtain support wires 3-5; the fixed pulley 3-2 is symmetrically mounted on the crossbeam frame 5-1 and the side beam frame 5-2;

[0009] The four winding shafts 2 are connected to two traction motors 3-1 respectively; every two traction wire ropes 3-3 are symmetrically wound on a winding shaft 2 in the same direction through a fixed pulley 3-2, so as to achieve the simultaneous traction of the sunshade net 3-1 up and down;

[0010] One end of the screen support line 3-5 is connected to the side beam frame 5-2 and the cross beam frame 5-1, and the other end is connected to the tension beam; the screen support line 3-5 is provided in plurality and placed at intervals; the sunshade net 3-4 is stuck in the middle of the screen support line 3-5;

[0011] The sunshade net 3-4 is provided with stretching power by traction wire rope 3-3.

[0012] Furthermore, one end of the sunshade net 3-4 is fixed to the traction aluminum tube 3-6, and the traction aluminum tube 3-6 is fixed to the traction wire rope 3-3; the other end of the sunshade net 3-4 is fixed to the crossbeam frame 5-1 or the side beam frame 5-2.

[0013] Furthermore, one fixed pulley 3-2 is placed on the side beam frame 5-2 at intervals of 10 meters, for a total of four; two fixed pulleys 3-2 are placed on the cross beam frame 5-1 at intervals of 10 meters, for a total of eight.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The four-stage synchronous internal sunshade device is suitable for large-span cold shed structures. It has low cost, light and simple features, and is suitable for widespread promotion and application.

[0016] 2. The four-stage synchronous internal shading device solves the problems of inconvenient operation and high construction cost of traditional greenhouse covering, and its shading efficiency is better than that of traditional shading methods;

[0017] 3. Combining traditional sunshade nets with new sunshade systems can adjust the sunshade mode according to the light required by crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a four-stage synchronous internal sunshade device for a large-span cold shed;

[0019] Figure 2 This is a schematic diagram of a four-stage synchronous internal sunshade device with a photosensitive system facing a large-span cold shed;

[0020] Figure 3 This is a schematic diagram of the traction device connection;

[0021] Figure 4 Schematic diagram of the traction motor position;

[0022] Figure 5 Schematic diagram of the photosensitive system;

[0023] Figure 6 Cross-sectional view of the light sensor location in the greenhouse.

[0024] In the figure: 1. Large-span greenhouse, 2. Winding shaft, 3. Traction device, 3-1. Traction motor, 3-2. Fixed pulley, 3-3. Traction wire rope, 3-4. Sunshade net, 3-5. Screen support line, 3-6. Traction aluminum tube, 4. Photosensitive system, 4-1. Light sensor, 4-2. Control cabinet, 4-3. Data cable, 4-4. Bracket, 5. Connecting frame, 5-1. Crossbeam frame, 5-2. Side beam frame. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 5 As shown, the four-stage synchronous internal sunshade device for a large-span cold shed includes a large-span cold shed 1, a winding shaft 2, a traction device 3 and a connecting frame 5.

[0026] The traction device 3 includes a traction motor 3-1, a fixed pulley 3-2, a traction wire rope 3-3, a sunshade net 3-4, a screen support wire 3-5 and a traction aluminum tube 3-6;

[0027] The connecting frame 5 includes a cross beam frame 5 - 1 and a side beam frame 5 - 2 .

[0028] The large-span cold shed 1 is an arched greenhouse;

[0029] The two traction motors 3-1 are respectively arranged in the middle of the two sides of the arched greenhouse, and the four sections of the winding shaft 2 are respectively fixed on both sides of the two traction motors 3-1. The fixed pulleys 3-2 are fixed in pairs to the ground on both sides of the greenhouse and the top of the greenhouse, with a pair every 1.5 meters. The top fixed pulleys cannot overlap and must be spaced 20 cm apart. The screen support lines 3-5 are respectively connected to the top of the greenhouse, the side beams, and the side beam skeleton at the bottom;

[0030] The four-stage synchronous internal sunshade device for large-span greenhouses includes four black sunshade nets 3-4 with a light transmittance of 80%. Two of the four sunshade nets 3-4 are fixed at their upper ends to the crossbeam frame 5-1 and their lower ends to the traction aluminum tubes 3-6. The other two are fixed at their upper ends to the traction aluminum tubes 3-6 and their lower ends to the side beam frame 5-2. The four traction aluminum tubes 3-6 are respectively fixed to the sunshade nets 3-4 on the side near the traction motor 3-1. The traction wire ropes 3-3 are respectively connected to the top fixed pulley, the bottom fixed pulley, the winding shaft 2, and the traction aluminum tubes 3-6.

[0031] The order in which the traction wire rope 3-3 is connected to the upper sunshade net 3-4 is: top fixed pulley, bottom fixed pulley, reel 2, upper traction aluminum tube 3-6, top fixed pulley. The rope needs to be wound twice when connected to reel 2. The order in which the traction wire rope 3-3 is connected to the lower sunshade net is: top fixed pulley, bottom fixed pulley, lower traction aluminum tube 3-6, reel 2, top fixed pulley. The rope needs to be wound twice when connected to the rotating shaft. The screen support wires 3-5 are respectively connected to the top crossbeam of the greenhouse and the middle crossbeams on both sides of the greenhouse. The fixed wire rope is located between each pair of fixed pulleys, connecting the top crossbeam of the greenhouse and the middle crossbeams on both sides of the greenhouse or the bottom crossbeams of the greenhouse and the middle crossbeams on both sides of the greenhouse.

[0032] Furthermore, the four-stage synchronous internal sunshade device for large-span greenhouses is driven by a traction motor 3-1 located in the middle of the greenhouse, driving the winding shafts 2 on both sides. The traction wire rope 3-3 on the winding shaft 2 drives the traction aluminum tube 3-6 to pull the sunshade net 3-4. The support wire 3-5 serves to secure the sunshade net.

[0033] In one embodiment, the four-stage synchronous internal sunshade device for the large-span cold shed further includes a photosensitive system 4, such as Figure 4 As shown, the photosensitive system 4 includes a light sensor 4-1, a control cabinet 4-2, a data line 4-3 and a bracket 4-4.

[0034] The optical sensor 4-1 includes an optical signal collector and an information processor. The optical signal collector is located in the hollow interior of the arched greenhouse, and the information processor is located near the door of the arched greenhouse.

[0035] Furthermore, the optical signal collector is placed in the middle of the arched greenhouse and mounted using bracket 4-4. The information processor is located near the door of the arched greenhouse and processes the information from the optical signal collector and compares it with the input threshold to complete the switching of the internal sunshade system. The information processor is located inside the greenhouse.

[0036] See Figure 1 The specific structure of this embodiment is: a four-stage synchronous internal sunshade device for a large-span cold shed, including a large-span cold shed 1, a winding shaft 2, a traction device 3, and a connecting frame 5.

[0037] See Figure 2 The specific structure of this embodiment is: a four-stage synchronous internal sunshade device for a large-span cold shed, including a large-span cold shed 1, a winding shaft 2, a traction device 3, a photosensitive system 4, and a connecting frame 5.

[0038] See Figure 3 The traction device 3 consists of two traction motors 3-1, multiple fixed pulleys 3-2, multiple traction wires 3-3, four shade nets 3-4, and multiple screen support wires 3-5. The traction motors 3-1 are dual-shaft motors connected to four winding spools 2. Eight traction wires 3-3 are symmetrically wound around the spools 2 in opposite directions. The upper left and upper right traction wires 3-3 connect to the upper left and upper right shade nets 3-4, while the lower left and lower right traction wires 3-3 connect to the lower left and lower right shade nets 3-4. The fixed pulleys 3-2 are symmetrically mounted on the crossbeam 5-1 and the side beams 5-2. This device places one fixed pulley 3-2 on the side beams 5-2, spaced 10 meters apart, for a total of four. This device places two fixed pulleys 3-2 on the side beams 5-1, spaced 10 meters apart, for a total of eight. In actual production, this fixed pulley system can be expanded as needed. The screen support wires 3-5 are connected to the side beam frame 5-2 and the cross beam frame 5-1. In this device, ten screen support wires are placed symmetrically along the traction motor 3-1 at 5-meter intervals. The sunshade net 3-4 is clamped between the screen support wires 3-5 to achieve the effect of supporting the sunshade net 3-4. In actual production, the screen support wires 3-5 can be expanded as needed.

[0039] See Figure 4 The four winding spools 2 are connected to two traction motors 3-1. Traction wire ropes 3-3 are wound symmetrically around each winding spool 2 in opposite directions, achieving the effect of simultaneously pulling the sunshade net up and down. The connecting frame 5 is the frame connecting the traction device 3 and includes a crossbeam frame 5-1 connected to the fixed pulley 3-2 and a side beam frame 5-2. This supports the normal operation of the traction device 3.

[0040] See Figure 5The photosensitive system 4, supported by bracket 4-4, is typically placed in the center of the greenhouse's sunshade system to monitor light intensity in real time. The photosensor 4-1 at the top continuously detects light intensity and converts it into an electrical signal. The MTS32 microcontroller in the sensor 4-1 amplifies, filters, and performs analog-to-digital conversion on the signal to produce a corresponding digital illuminance value.

[0041] Light sensor 4-1 stores the digital illuminance value in a specific Modbus holding register. After receiving the request from control cabinet 4-2, light sensor 4-1 parses and verifies the request. If the request is legitimate, light sensor 4-1 packages the illuminance data in the corresponding register according to the Modbus protocol format and sends it back to control cabinet 4-2 via the communication line.

[0042] The Modbus communication module in control cabinet 4-2 verifies and analyzes the received data, extracting the light intensity value. The photosensitive system 4 compares the analyzed light intensity value with a preset light intensity threshold to determine the internal sunshade system's action, such as expanding, contracting, or maintaining the current state.

[0043] If data errors, timeouts, or other abnormal situations occur during communication, both parties will perform corresponding operations based on the error handling mechanism of the Modbus protocol, such as resending requests, reporting errors, etc., to ensure the accuracy and reliability of the data.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A four-stage synchronous internal sunshade device for large-span cold sheds, characterized in that: The four-section internal sunshade device for a large-span cold shed comprises a large-span cold shed (1), a winding shaft (2), a traction device (3) and a connecting frame (5); The connecting frame (5) comprises a crossbeam frame (5-1), a tension beam and a side beam frame (5-2); the crossbeam frame (5-1) is located at the top of the large-span cold shed (1), and the side beam frames (5-2) are located at the bottom of both sides of the large-span cold shed (1); the tension beam is located parallel to the crossbeam frame (5-1) and the side beam frame (5-2); Two traction devices (3) are provided and symmetrically arranged in the large-span cold shed (1), and both ends of the traction devices are respectively connected to a winding shaft (2); The traction device (3) comprises a traction motor (3-1), a fixed pulley (3-2), a traction steel wire rope (3-3), a sunshade net (3-4) and a plurality of screen supporting wires (3-5); the fixed pulley (3-2) is symmetrically mounted on the crossbeam frame (5-1) and the side beam frame (5-2); Four winding shafts (2) are respectively connected to two traction motors (3-1); two traction steel ropes (3-3) are symmetrically wound on a winding shaft (2) in the same direction through a fixed pulley (3-2), so as to simultaneously pull the sunshade net (3-4) up and down to open and close; One end of the screen support line (3-5) is connected to the side beam frame (5-2) and the cross beam frame (5-1), and the other end is connected to the tension beam; a plurality of screen support lines (3-5) are provided and placed at intervals; the sunshade net (3-4) is stuck in the middle of the screen support lines (3-5); The sunshade net (3-4) is provided with a stretching power by the traction wire rope (3-3).

2. The four-stage synchronous internal sunshade device for large-span cold sheds according to claim 1 is characterized in that: One end of the sunshade net (3-4) is fixed to the traction aluminum tube (3-6), and the traction aluminum tube (3-6) is fixed to the traction wire rope (3-3); the other end of the sunshade net (3-4) is fixed to the crossbeam frame (5-1) or the side beam frame (5-2).

3. The four-stage synchronous inner sunshade device for large-span cold sheds according to claim 1 or 2, characterized in that: One fixed pulley (3-2) is placed on the side beam frame (5-2) at intervals of 10 meters, with a total of four fixed pulleys; two fixed pulleys (3-2) are placed on the cross beam frame (5-1) at intervals of 10 meters, with a total of eight fixed pulleys.

Images