Leak-proof water valve of toilet tank

A leak-proof water valve of a toilet tank, which includes a water inner tube, an outer tube group and a buoyant housing, wherein:

• the water inner tube, an engaging bolt and multiple outlets are set on its lower side, the engaging bolt is set on a bottom side of the toilet tank and a locking nut is used to fasten;
• the outer tube group, which is consisted of an outer tube, a cover, a connecting rod, an adjustment rod, a sealing plug, a cross rod and an elastic element;
• the outer tube is set on an outer peripheral edge of the water inner tube, a water control base and an outlet pipe are set on an upper end of the outer tube, a first arm, a second arm, a shaft tube and an outlet hole are set on the water control base, the outlet hole is communicated with an outlet through pipe set inside the outer tube, a first positioning hole and a first shaft hole are set on the first arm, a second shaft hole is set on the second arm, the first shaft hole is corresponded to the second shaft hole;
• a sealing ring and a pad are set between the water control base and the outlet through pipe;
• the cover is covered on a top of the water control base;
• a second positioning hole, two corresponding supporting shafts, two hook arms and a first piece are set on an inner side of the connecting rod, a notch is set between the two hook arms, the two corresponding supporting shafts are set into the first and second shaft holes respectively, a holder is set on an outer side of the connecting rod;
• a sleeve segment set on an upper end of the adjustment rod is provided for the holder to hold, an adjustment segment is set on a lower section of the adjustment rod;
• a transverse rod is set on an upper end of the sealing plug, the transverse rod is clamped by the two hook arms, an lower section of the sealing plug is a cotter, the cotter is inserted between the outlet hole and a through hole of the pad, the sealing plug is provided to move up and down to control operations of the outlet through pipe;
• an end of the cross rod is connected to an end of a second chain, another end of the second chain is set on a pull rod, a hinge is set on another end of the cross rod, a second piece is set on a side of the hinge, the second piece is provided to push the first piece, the hinge is set on the shaft tube;
• a first pin of the elastic element is fixed to the first positioning hole, a second pin of the elastic element is fixed to the second positioning hole;
• the buoyant housing, a punched hole is set on it, the punched hole is provided for the outer tube being inserted, so that the buoyant housing could be moved up and down on the peripheral edge of the outer tube, a preloading room and a loading room are set on a top of the buoyant housing, the position of the preloading room is higher than the loading room, a water hole is set between the preloading room and the loading room, a buoyant room is set on a bottom side of the buoyant housing, two corresponding third arms and a first drain hole are set outside of the peripheral edge of the buoyant housing corresponding to the loading room, a shaft hole is set on the third arm, the shaft hole is provided for a supporting shaft of a positioning collar to set on, the positioning collar is provided for the adjustment segment of the adjustment rod to set inside.