| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk type strainer easy to take a united type structure out of the inside from the upper part and to insert and fix the structure again and capable of evenly dispersing water and air. SOLUTION: The strainer main body is composed of an upper structure body 1, a screwing engagement part 2 having a female screw, and a lower pipe part 3. A united structure body 6 composed of a reception part 7 having a female screw for a disk pressing bolt, an opening part 8 formed in the lower part for introducing and discharging water and air, and a screwing engagement part 9 having a male screw and formed in the further lower part is installed in the inside of the upper part structure body. The lower pipe part has an air flow inlet, an air discharge outlet, a water flow inlet, and a water flow outlet and a pipe 4 with a smaller outer diameter than the lower pipe part is inserted and fixed in the inside of the screwing engagement part 9 having the male screw.
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