III. Installation Steps and Precautions
1. Pre-Installation Preparation:
Before installing the interior shading system, carefully inspect all materials and components to ensure they are complete, intact, and meet the design specifications. Also, clean the installation area inside the greenhouse to ensure there are no debris obstructing the installation. Prepare all necessary tools, such as power wrenches, screwdrivers, electric drills, and levels, and calibrate them to ensure proper operation.
2. Support Structure Installation
1. Installing the Uprights and Crossbeams:
According to the design drawings, accurately determine the positions of the supporting uprights within the greenhouse. Secure the uprights to the ground using expansion bolts or pre-buried anchor bolts, ensuring they are perpendicular to the ground and within the specified tolerances. Then, install the crossbeams and connect and secure them to the uprights, ensuring they are level and forming a stable support structure.
2. Installing the Support and Hold-Down Wires:
The support and hold-down wires support and secure the shade curtain, ensuring it remains flat during deployment and retraction. The support wires should be evenly spaced along the direction of the sunshade screen, generally spaced 50-60 cm apart. The pressure wires can be spaced 100-120 cm apart. The support and pressure wires are secured to the support structure with tensioners at both ends, and the tension should be adjusted to the appropriate level to avoid looseness or over-tightening.
3. Sunshade Screen Installation:
Lay the sunshade screen flat between the support and pressure wires, ensuring the foil side of the sunshade mesh faces upward to maximize its sunlight reflection. First, secure one end of the sunshade screen. Use special clips or tie wire to securely connect the screen to the support structure, ensuring a smooth, wrinkle-free surface. Then, slowly pull the screen to the other end and secure it. During the installation process, check the screen for flatness and tension, and adjust any issues promptly. For large-area sunshade screens, install them in sections, ensuring that each section is securely connected to ensure the integrity of the entire screen.
4. Drive System Installation
- Installing the Motor and Reducer:
Install the reducer motor in a predetermined location, typically at one end or in the middle of the greenhouse, for easy access and maintenance. Use motor brackets to secure the motor to the supporting structure and ensure it is securely mounted for smooth operation. Then, connect the reducer to the motor, paying attention to the concentricity and tightness of the connections to prevent loosening and oil leakage.
- Installing the Drive Shaft and Gear Rack (or Cable):
The drive shaft is a key component for transmitting power. Ensure it is installed level and within tolerances. Slide the gear onto the drive shaft and mesh it with the rack to ensure smooth transmission. For cable-driven systems, install the cable on the pulley and fixture according to design requirements and adjust the cable tension. During installation, lubricate all transmission components to reduce friction and extend the life of the equipment.
- Connecting the Control System:
The control system for an internal shading system generally includes a controller, sensors, and operating switches. Install the controller in a convenient location and connect the power supply and the control cables for the sensors and motor. Sensors can be selected as needed, such as light sensors and temperature sensors, to automatically control the deployment and retraction of the sunshade curtains based on environmental parameters. After connecting the control system, careful commissioning is required to ensure proper communication between all components and accurate control.
5.Commissioning and Acceptance:
After installation, the interior sunshade system must undergo comprehensive commissioning and acceptance. First, check whether the sunshade curtain deploys and retracts smoothly, whether there are any lags or deviations, and whether the operating speed meets the design requirements. Next, manually operate the sunshade curtain using the controller to verify the accuracy and reliability of the limit devices and whether the limit switches promptly cut off power to the motor when the curtain reaches its limit position, preventing overload. Next, simulate different light intensity and temperature conditions to test the control system's automatic control functions and verify whether the curtain can automatically adjust its deployment according to the set parameters. Finally, inspect the installation quality of the entire interior sunshade system, including the sturdiness of the supporting structure, the securement of the curtain, and the lubrication of the transmission components. Only after satisfactory commissioning and acceptance can the interior sunshade system be officially put into operation.
The design and installation of a multi-span greenhouse internal shading system is a comprehensive undertaking, involving multiple areas of expertise and expertise. Only by fully considering various factors during design and strictly adhering to standard installation procedures can the internal shading system achieve optimal performance, providing a favorable environment for crop growth within the greenhouse and helping agricultural production achieve high yields, quality, and efficiency.
