1. Inspection of shed body: Before installing the shed louver machine, we must first have a detailed understanding of the vegetable shed. After on-the-spot investigation, we should pay attention to the following points regardless of the steel frame structure or the steel pipe mixed bamboo pole structure:
First, the greenhouse is required to have sufficient strength and bearing capacity, which can bear the overall weight of the straw cover rolled up in a straight line and the shutter in the greenhouse, so as to avoid crushing the greenhouse or making the shutter fail.
The second is to observe whether the height of the east and west ends of the shed is symmetrical and whether the terrain in front of the shed is too low, otherwise rectification will be carried out, otherwise the installation and adjustment will increase the difficulty.
Third, observe the permeable membrane on the roof. If it is 2.5 meters, it should be replaced with a 3-meter membrane. Otherwise, after the roller blind is rolled up, it is easy to press the vent and it is difficult to ventilate.
2. Selection: According to the length, width and height of the greenhouse and the weight of the curtain, refer to the manual of the curtain rolling machine in the greenhouse to determine the model of the curtain rolling machine. At the same time, considering that rain and snow will increase the weight of curtains, greenhouses with small camber and large width will also increase the load of curtain rolling machines in greenhouses;
Therefore, these factors must be considered when choosing. Be sure to choose the model of the electric shutter and leave a load margin, so as to ensure the long life and safety of the shutter. For vegetable greenhouses with a shed length of 100 m, three-phase 1.5 kW and 4-axis shutters can be used.
3. Preparation of lawn film or heat preservation: The lawn film should be uniform in thickness and length, vertically fixed on the winding rod and arranged in zigzag. Pay attention to the equal amount of interleaving on both sides of the straw mat. If the old and new straw mats are mixed, they must be arranged alternately and symmetrically as far as possible to avoid unsynchronized rolling and overall deviation.
4. Laying drawstring: drawstring is used to reduce the adverse effects of the self-weight and rolling force of roller blinds in greenhouse on grass. The reasonable use of the drawstring is directly related to the service life of grass and the synchronous operation of the machine. One end of the drawstring is fixed on the ground anchor steel wire at the top of the shed, and the other end is fixed on the roller shutter reel under the shed. The working length and tightness of each drawstring are required to be consistent and standardized.
5. Power supply installation: It is recommended to install the power supply device in the shed at one end, and it is forbidden to install it in the open air to prevent wind and rain. It is suggested that the electric knife switch and the reverse switch should be used together.
Characteristics of self-propelled roller shutter in greenhouse with extended data shed surface
Advantages:
(1) is safe and reliable. Firstly, it solves the problem of personal accident caused by careless winding of the pull-back roller in the past; Second, hand-held reverse switch, remote operation, not easy to cause personal injury accidents.
(2) high working efficiency and time saving. For example, a 72-meter-long vegetable greenhouse needs 57 beds, with a width of 1.4 meters, and it takes 1.5-2 hours to pull and release the grass manually every day, while it takes 7 minutes and 4 minutes to pull and release it with this shutter.
(3) Easy installation and disassembly. The winding rod of the shutter is connected with a flange, generally 6 meters long, and can be disassembled at any time when not in use.
(4) No hidden trouble of braking. Generally, electromagnetic brakes are used, which have braking and buffering performance, and can ensure safety even in special circumstances such as rain and snow weather or sudden power failure.
Disadvantages: The self-propelled roller shutter in greenhouse is not suitable for vegetable greenhouses under high-voltage lines, but it can be applied to track roller shutter (because its height is only 2 meters higher than the roof of greenhouse).