Foldable windproof unit, large-span windproof net structure thereof and windproof method

A windproof method, using a foldable windproof unit comprising:

• a flexible windproof net,
• towers arranged at intervals, and
• a load-bearing rope erected on the two towers,
• wherein the tower on one side is provided with a horizontal pulley assembly, and the tower on the other side is provided with two vertical pulleys;
• the top edge of the flexible windproof net is slidably connected to the load-bearing rope by means of a plurality of hanging structures;
• the foldable windproof unit further comprises a traction rope, the traction rope is arranged on the horizontal pulley assembly in a sleeving manner, and
• the two free ends of the traction rope extend to respectively bypass the two vertical pulleys and are connected to a winding mechanism;
• the hanging structure close to the tower on one side is fixedly connected to the traction rope, and
• the flexible windproof net is driven to be unfolded or folded through the forward and reverse rotation of the winding mechanism,
• the method comprising the following:
• during wind prevention, the winding mechanism rotating forwards to drive hanging structures, by a traction rope, to move in a direction from a tower on the other side to a tower on one side along a load-bearing rope, the flexible windproof net is driven by the hanging structures to be gradually unfolded, and the unfolded flexible windproof net plays a role of wind prevention;
• and
• after the wind prevention is finished, the winding mechanism rotating reversely to drive the hanging structures, by the traction rope, to move in a direction from the tower on one side to the tower on the other side along the load-bearing rope, and the flexible windproof net is driven by the hanging structures to be gradually folded.