| 摘要 |
A rainwater head, including: a dome, a drainage pipe, a siphon, and a ball cock mechanism. The drainage pipe includes a drainage exit and a wall including a water outlet hole. The ball cock mechanism includes a floating ball, a connecting bar, a fulcrum, and a stopper. The drainage pipe is connected to the lower part of the dome. The drainage exit is arranged on the top of the drainage pipe. The drainage exit is adapted to be between 5 and 10 cm higher than the roof. The water outlet hole is arranged on the wall of the drainage pipe at a position having the same height as the roof or is lower than the roof. The siphon is disposed on the upper part of the drainage pipe. The inlet of the siphon faces the roof; and the outlet of the siphon extends inside the drainage pipe. |
| 主权项 |
1. A rainwater head for draining water from a roof, the rainwater head comprising:
a) a dome (1), said dome comprising a lower dome part; b) a drainage pipe (2), said drainage pipe (2) comprising a pipe top comprising a drainage exit (3), a pipe wall comprising a water outlet hole (4) having drainage capacity, and a water inlet opening being adapted to be connected to a surface of the roof; and c) a ball cock mechanism, said ball cock mechanism comprising a floating ball (8), a connecting bar (7), a fulcrum (6), and a stopper (9);wherein:
said drainage pipe (2) is connected to said lower dome part; said drainage exit (3) is arranged on said pipe top; said drainage exit is adapted to be disposed at a first position that is higher than the surface of the roof, a first distance is formed between said first position and the surface of the roof, and said first distance is equal to a first preset value; said water outlet hole (4) is adapted to be arranged on said pipe wall at a second position that is located as high as the surface of the roof or is lower than the surface of the roof; said fulcrum (6) is arranged on said pipe wall above said water outlet hole (4); said floating ball (8) is fixed on said fulcrum (6) via said connecting bar (7); said stopper (9) comprises a first stopper end fixed on said fulcrum (6), and a second stopper end inclined downward with respect to said first stopper end and in close proximity to said water outlet hole (4) for the purpose of enclosing said water outlet hole (4); and said floating ball (8) is adapted to be disposed outside of said drainage pipe (2) and be exposed to the water; said floating ball (8) is movable with the level of the water with respect to the surface of the roof;when in use:
when said floating ball (8) is moved with the level of the water with respect to the surface of the roof, said floating ball (8) drives said connecting bar (7) to rotate about said fulcrum (6), and said connecting bar (7) drives said stopper (9) and said second stopper end to rotate about said fulcrum (6); when said floating ball (8) is moved with the level of the water with respect to the surface of the roof, said connecting bar (7) carrying said floating ball (8) and said stopper (9) carrying said second stopper end rotate about said fulcrum (6) in a same direction; whereby when said floating ball (8) is moved upwards, said second stopper end is moved downwards, and when said floating ball (8) is moved downwards, said second stopper end is moved upwards; when the level of the water with respect to the surface of the roof is equal to or higher than a second preset value, said second stopper end is moved to enclose said water outlet hole (4) to stop draining water from the roof; when the level of the water with respect to the surface of the roof is lower than said second preset value, said second stopper end is moved to open said water outlet hole (4) to start draining water from the roof; and said second preset value is smaller than said first preset value. |
