Rewinding waterwheel, transmission gearbox of the waterwheel, and irrigation method thereof

A rewinding waterwheel, comprising a secondary body (1), a main body (2), and a plurality of guide members (3);

• wherein the main body comprises a rewinding waterwheel frame (21), a hub ring shaft (22) and a water pipe (23) wound around the hub ring shaft (22) and mounted on the rewinding waterwheel frame (21) and free to rotate;
• the secondary body (1) comprises a waterwheel frame (11) and a sprinkler head (12) fixed and installed onto the waterwheel frame;
• and an end of the water pipe (23) is fixed and communicated to the sprinkler head (12);
• and
• a guide member of the plurality of guide members (3) is installed on a ground, and the water pipe (23) is in a rolling contact with an outer circumferential surface of the guide member (3);
• wherein the secondary body (1) further comprises a gate valve switch (13) for controlling the ON/OFF status of the sprinkler head (12), and the gate valve switch (13) is rotated forward to turn off the sprinkler head (12) and rotated backward to turn on the sprinkler head (12);
• after rewinding the water pipe (23), the gate valve switch (13) is contacted with the rewinding waterwheel frame (21), and a tightening force of the water pipe (23) is provided to drive the gate valve switch (13) to be rotated forward to turn off the sprinkler head (12);
• wherein the gate valve switch comprises a valve (101), a hand rod (102) having a horizontal section, a link rod (103), a hinge plate (104) and a piston head (105), and the water pipe (23), the valve (101), and the sprinkler head (12) are sequentially communicated to one another from bottom to top, and the valve (101) comprises a piston hole and a hinge seat (106), and an end of the piston head (105) is transversally and movably plugged into the piston hole, and the other end of the piston head (105) is coupled to the hinge plate (104), and both upper and lower ends of the hinge plate (104) are rotatably coupled to the hinge seat (106) and the link rod (103) respectively, and the waterwheel frame (11) has a mounting plate (107) installed thereto, and the hand rod (102) is rotatably installed onto the mounting plate (107), and the link rod (103) is hinged to an end of the horizontal section of the hand rod (102).