Assembled double-chord beam greenhouse skeleton

Abstract

The invention discloses an assembled double-chord beam greenhouse skeleton, which comprises a plurality of double-chord beams connected through cross connecting pieces and multiple cross rods, wherein upper chord beams and a back slope main beam are formed by n-shaped steel; lower chord beams and a cant beam are formed by round tubes, square tubes or flat round tubes; sliding rails are arranged on the lower sides of the lower chord beams and the cant bean; a plurality of curtain pulleys are arranged in the sliding rails; rope winding fixed pulleys are arranged at the lower ends of the sliding rails; curtain blocking rings are arranged at the upper ends of the sliding rails; a rope winding shaft parallel to the cross rods and a rope winding motor for driving the rope winding shaft to rotate are arranged at the lower end of the back slope main beam or the upper part of a rear wall body of a greenhouse; the curtain pulleys comprise pulley frames and rollers; rope penetration rings are arranged on the middle part of the pulley frames; curtain structures are arranged on the lower parts of the pulley frames. The assembled double-chord beam greenhouse skeleton is simple and reasonable in structure, low in material cost and labor cost and short in construction time, and has fewer skeleton welding spots, and a sunshade curtain can be conveniently arranged and use.

Description

technical field [0001] The invention relates to a greenhouse frame, in particular to an assembled double string beam greenhouse frame. Background technique [0002] The steel frame structure greenhouse skeleton has many advantages, such as strong and durable structure, strong wind resistance and compression resistance, large front and rear span, no indoor column, and full and reasonable use of land area. Double-string beams have the advantage of strong supporting force, so at present, double-string beams are generally used in the framework of steel frame greenhouses. [0003] In the prior art, a double-chord beam of a truss structure is generally used, and the double-chord beam of the truss structure includes an upper chord, a lower chord, and a round steel or angle steel welded between the upper chord and the lower chord. The disadvantage is that the double-string beam is welded into an integral structure when it leaves the factory, and the length is large, which is very i...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the double chord girders are welded into an integral structure when they leave the factory, the length is large, and it is very inconvenient to load, transport and construct

In addition, there are many solder joints, easy to rust, and short life; rust stains rubbed on the shed film will cause the light transmittance of the shed film to decrease; the welding workload on the installation and construction site is heavy, and the construction time is long, especially at present. Under the circumstances, the labor cost is high and the investment recovery period is long, which seriously hinders the popularization and application of steel frame structure greenhouses

[0004] Installing sunshade curtains in the greenhouse to block the sun in hot weather is a necessary measure for modern horticultural cultivation techniques. In the prior art, the installation structure of the greenhouse sunshade curtain is complicated, the cost is high, the operation is inconvenient, and the sunshade effect is not ideal.

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