Snorkel upper discharging head having waterproof device

A snorkel upper discharging head having a waterproof device, comprising:

• a snorkel upper discharging head body (1);
• a floating drum (3);
• an air inlet hole (4);
• the air inlet hole (4) being arranged at a front end of the snorkel upper discharging head body (1);
• a sealing ring (2);
• the air inlet hole (4) being sleeved with the sealing ring (2);
• an air duct (5);
• the snorkel upper discharging head body (1) being internally provided with the air duct (5);
• the air duct (5) being in communication with the air inlet hole (4);
• circular arc sliding slots (6);
• the circular arc sliding slots (6) being arranged at left and right inner sides of the snorkel upper discharging head body (1);
• the floating drum (3) being clamped in the circular arc sliding slots (6);
• a water seal face (7);
• the water seal face (7) being joined to the sealing ring (2);
• the water seal face (7) being arranged in a middle of the floating drum (3);
• small air inlet holes (31);
• the small air inlet holes (31) disposed on two sides of an upper end of the floating drum (3) in the vicinity of the water seal face (7);
• and
• the floating drum (3) comprising a floating drum left cover (32) and a floating drum right cover (33) bonded to each other by means of ultrasonic welding.