Installation principle of accessories for multi-span glass greenhouse outdoor shading system

The small parts of the greenhouse shading (heat preservation) system should generally follow the following quantitative principles:

1. Curtain line: transparent PET curtain line is used inside, and PET black anti-UV curtain line is used outside.

1) The outer shading curtain line is within the width of each zone, and the spacing is generally 500mm, and the upper and lower curtain lines use the same spacing.

2) The inner shading (using curtain) is within the width of each zone, the distance between the lower curtain line is 500mm, and the distance between the upper curtain line is 2000mm.

3) Inner insulation (V-shaped, using non-drip film). Within the width of each zone, the screen line spacing is about 150mm. In order to make the water droplets slide into the bottom of the V-shaped groove smoothly, there is no upper screen line.

4) If there are both upper and lower curtain lines, the distance between the upper and lower curtain lines is not less than 50mm.

5) When there is a heat preservation pocket, the edges of the heat preservation pocket 2 are straightened by curtain wire, and the cable tie is fixed on the curtain wire.

6) PET curtain wire has good tensile performance and elongation at break. The 2025 type curtain wire can withstand a tensile force of no more than 150kg, but the abrasion resistance is slightly worse. The design should avoid friction between the curtain wire and sandy objects. Consider the influence of wind load.

7) When the outer shading curtain line is fixed, the intersection of the bottom curtain line and the crossbar must be wound once, and this length should be added in the design. picture

2. Stainless steel wire:

1) The side of the outer sunshade screen has a drooping end, 2 on each side, 4 on each zone, and the upper and lower spacing is about 350mm-500mm.

2) The side of the inner sunshade screen has a drooping end, one on each side, two per partition, and the upper and lower spacing is about 350mm-500mm.

3) External shading (V-shaped internal heat preservation) is used to strengthen the two ends of the span to increase wind resistance (for external use) and improve wear resistance, generally one every 3~4 meters, Venlo greenhouse can be arranged according to one spire . picture

3. Aluminum binding wire:

1) At the intersection of the inner shading (heat preservation) curtain line and the beam, aluminum binding wires are required to bind the curtain line to avoid slippage of the curtain line.

2) In the inner sunshade, when the card slot is not used to fix the curtain, the aluminum binding wire is single-stranded to tie the fixed end of the curtain at a pitch of 0.25m; and the curtain wire at the same position is bound.

3) In the external sunshade, when the card slot is not used to fix the curtain, the aluminum binding wire is double-stranded at a distance of 0.25m to fasten the fixed end of the curtain, and bind the curtain wire at the same position. picture