Similar to the requirements of the filming of other greenhouses (common arch sheds and vegetable greenhouses), in order to create more appropriate environmental conditions such as temperature and light for the growth of vegetables, it is recommended to select high light transmittance, high mechanical strength, and resistance to aging, and no drops and fog. Excellent performance of the film, EVA film, PO film is more appropriate.
After the film is ready, you can choose to cover the film on a sunny, windless morning. In comparison, the new high-temperature arch sheds are more complicated than ordinary sheds and vegetable greenhouses. Taking a large arch shed with a span of 22.11 meters as an example, it is necessary to cover four shed membranes, one on each side of the middle shutter cradle (the width after processing is 2.9 meters, and the other is more than 40 cu About centimeters, used to cover the gap between the two films, it is about 3.3 meters). The remaining two are each a shed film on the roof of the east-west roof. The width of the roof can be measured with a long rule to ensure accuracy.
In addition, during the process of covering the shed film, especially when covering the columns on the east and west sides, it is recommended that you first wrap the ribs around the arches of the side columns and the outcrops of the bamboo worms to prevent damage to the new shed film.
After the cover film is covered, the shutter can be installed. (Note: This type of large arch shed must be installed because it is inconvenient to manually pull the grass cover).
In practice, it has been found that a new type of high-temperature large-arch shed should use a 34-watt screw-type roller shutter (also called a pull-type roller blind), instead of a rear-mounted roller blind. The reason is that if the latter two things do not start synchronously, it is very dangerous to easily collapse the entire shed body.
The roller shutters in this booth can be placed on a special roller shutter bracket in the middle of the roof. The height of the screw is about 50 cm from the top surface of the booth, and the matching pull rope is selected. The grasshopper in the west. The installation method is as follows:
1. Make a roll rod. It is made of two 6-millimeter-weighted 1.5-inch steel tubes welded with an inner tube, which can be used as a 12-meter universal roll rod.
2. After the shutter is installed and adjusted, the machine is filled with oil. The butter is coated with butter, three-phase power is turned on, and the shutter is operated by turning the switch back and forth several times. Finally, the screw is turned to the maximum position, but there must be about 5 cm of wire remaining.
3. Use a long meter ruler to measure a 12-meter-long position from the head of the long-barreled bar head to the direction of the north head of the shed, if it is in the middle of the two brackets, about 50 centimeters from the front bracket, or about 1.5 meters from the rear bracket. , then even if this roll is suitable, and remember the order, ready for installation.
4. Then continue to the north part of the shed where the measurement is taken. At this time, if the distance is 12 meters, if it is less than 30 centimeters from the front bracket, then it can be cut off by 30 centimeters to make it 1.7 meters to meet the requirements. If it is more than 50 centimeters from the front bracket, it will meet the requirements without cutting. In addition, if it is less than 1.5 meters from the rear bracket, it can be connected to a section of the head from the rear bracket 1.5 meters or more, and so on.
In short, as long as the head is about 50 centimeters away from the stent, or not less than 1.5 meters from the stent, it meets the requirements of the shutter. Also note that the last roll requires 1.6 meters more.
5. In the same way, measure the length of the rod in the south of the shed. Note: The length of the last roll rod to the shed bracket should be an additional 20 cm.
6. After the volume of the two roller shutters is good, in accordance with the order of the windings of each roller blind, drill 8-10 mm holes in the two ends of each bar, and the hole is about 4 cm from the club head. The inner drive shaft is a 1-inch thick-walled steel pipe, which is about 18 centimeters long. The distance between the two drill holes is 9-10 centimeters. Use a propeller shaft to connect each roll rod and the shutter with a screw and turn the shutter by hand. After the test is completed, fix the bracket with a ∪-type screw and install an angle of 55 centimeters in the shed. Make it welded to the stand column. In this way, the shutter system is installed.
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