| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a prerotation tank and a sewage pump device such that a division surface can be prevented from having a gap formed with simple constitution. <P>SOLUTION: A prerotation tank 10 of a sewage pump device 100 installed in a manhole 200 includes an edge part 20 conforming with an inner peripheral shape of the manhole 200; a shallow part 21 provided at a lower position than the edge part 20 and formed of a plane connecting with the edge part 20 by an inclined plane; a deep part 22 having its bottom surface provided at a lower position than the shallow part 21; an inclined part 23 connecting the shallow part 21 and deep part 23 by an inclined plane; a first member 27 having one part of the edge part 20, one part of the shallow part 21, and one part of the deep part 22 and inclined part 23 molded in one body; a second member 28 having the other part of the edge part 20, the other part of the shallow part 21, and the other part of the inclined part 23 molded in one body; first and second flange parts 33, 36 provided to the first member 27 and second member 28 respectively and abutting against each other; and a lock part 31 which is provided to one of the first and second flange parts 33, 36 and into which the other is inserted. <P>COPYRIGHT: (C)2013,JPO&INPIT |
