The plastic film small arch shed has a simple structure, convenient material selection, easy construction, low cost, various forms of application in production, can be adapted to local conditions, flexible design, and can be combined with large-scale greenhouses, multi-span greenhouses and other large facilities. .
1. Arch round small arch shed
The arched circular arch shed is the most widely used type in production. It is also called a small temperature shed. It mainly uses bamboo, bamboo raft, vitex or 68 mm diameter steel or thin-wall steel pipe, and is bent to a width of 13 meters and a height of 1 meter. The left and right arched skeletons are connected with bamboo rafts and iron wires between the skeletons: some of them are inserted deep into the soil at the ends of the arches. If the arches are strong, the arches may not be connected. . The plastic shed film is fastened on the arch frame. After the tension is tightened, the edge is buried with soil. The shed film is fixed with a pressure bar or a pressure line. In the case of a small arch shed which is short and windproof, it can also be used. Pressure bar or pressure line.
2, half arched small arch shed
There is a soil wall with a length of about 1 meter in the north and a semi-arched shed in the south: this small arch shed is generally a columnless shed. When the span is large, 12 rows of columns can be set in the middle to support the rain, snow and cold insulation. The load caused by the covering or the like. Some are made of steel bars and steel pipes, and one side is half-arched and round. This small arch shed should be east-west and good for daylighting. Because the small arch shed is erected on one side, the space inside the shed is larger, which is conducive to the growth of the seedlings.
3, double inclined arch shed
The shed is shaped like a ridge or a triangle. The scaffolding direction can be extended from east to west and from north to south, but the illumination in the shed is uniform in the north-south direction. This kind of shed is suitable for the south with less wind and rain: it can be covered by flat land, or it can be covered by frame and covered in various forms. Such sheds are generally provided with uprights below the ridges to support the load. This kind of small temperature shed is made into a frame and then covered or combined with a semi-underground type cold bed. Otherwise, it is directly covered in the open field, and the space on both sides is too small, which is not conducive to planting seedlings, and the effective effective area is small. .
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