| 摘要 |
PROBLEM TO BE SOLVED: To make a guide plate for being installed in a riser secure durability high enough to receive sewage flowing in; and to shorten the time necessary for working and reduce manufacturing costs, by reducing the number of working man-hours for installing the guide plate. SOLUTION: The guide plate 15 specifies the swirling direction of the sewage by dividing an outer peripheral surface of an air core tube 12 in the riser 1 and an inner peripheral surface of a riser body 11. The guide plate 15 is formed by being fixed in the state of being inserted into a slit 121 for the guide plate, which is provided in the side part of the air core tube 12. The longitudinal side edge of the guide plate 15 is provided with an inner flange part 17 which abuts on the inner peripheral surface of the air core tube 12 when the guide plate is fixed in the state of being inserted into the slit 121 of the air core tube 12, and an outer flange part 18 which abuts on the outer peripheral surface of the air core tube 12. COPYRIGHT: (C)2007,JPO&INPIT
|
