The construction of multi-span greenhouses is restricted by many factors

LargeConstruction of multi-span greenhousesMainly refers to the large-scale (covered area is mostly 1 hectares), the environment is basically not affected by the natural climate, can be automatically adjusted, can be used for horticultural crop production all day long, is a high-level horticultural facilities type. Large-scale multi-span greenhouses are widely used in cucumber production due to their advantages of large coverage area, high land utilization rate, and strong environmental control capabilities. However, the winter in the cold regions of northern China has caused greater energy consumption and costs for cucumber production, which seriously restricts the promotion and application of this type of greenhouse.

The construction of large-scale multi-span greenhouses is widely used in tomato production due to its advantages of large coverage area, high land utilization rate and strong environmental control capabilities. However, the winter in the cold regions of northern China causes a lot of energy consumption and cost, which seriously restricts the promotion and application of this type of greenhouse. To this end, it is necessary to build a modern large-scale multi-span greenhouse that conforms to local characteristics, has excellent energy-saving performance, and has strong environmental control capabilities according to the specific meteorological conditions in the region and the capital conditions of the investors.

The installation of multi-span greenhouses should follow the principle of bottom-up, high-low, outside-in, first underground and then ground. The installation order of the greenhouse project is: skeleton → outer shade → top cover → protection around → wet curtain fan → inner shade → control → heating → bed → water supply. (1) Installation of steel framework The installation order of the greenhouse framework is: main column → gutter (including outer shade column) → truss → auxiliary column → cross brace → arch bar → purlin → outer shade horizontal brace → diagonal tie bar.