| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum valve unit capable of reducing noise caused by the transmission of suction sound made in a sewage tank of the vacuum valve unit, to the outside. SOLUTION: The vacuum valve unit includes: the sewage tank 5 storing sewage; a vacuum valve 7 provided in the sewage tank 5 to deliver sewage stored in the sewage tank 5, to a vacuum sewer pipe 1 from a sewage suction pipe 8 when the valve is opened; and an air suction pipe 9 connected to the sewage tank 5 to allow outside air to be supplied to the sewage tank 5. A first sound absorbing member 11 and a second sound absorbing member 12 capable of absorbing sound by converting the sound into vibrational energy are provided inside the air suction pipe 9. COPYRIGHT: (C)2010,JPO&INPIT |
