| 摘要 |
PROBLEM TO BE SOLVED: To provide drainage catchment structure of a back flow check valve capable of surely collecting water drained from the back flow check valve provided in the middle part of a pipe and, at the same time, minimizing the size of each of constitutive sections and taking compactness of piping equipment into consideration. SOLUTION: A joint member 3 having a specific capacity of a water discharge space is provided in a drain outlet 21 of a back flow check valve 10 set in the middle part of a pipe 1 and having a drainage mechanism for preventing a back flow of fluid, and a drainage catchment structure of the back flow check valve having such construction as a drain pipe 2 having a water receiving section 4 is provided to the bottom of the joint member 3. Then, a cut-off plate 5 projected to the water discharge space and preventing the scattering of water discharged from the drain outlet is provided in the drain outlet of the back flow check valve 10. A joint pipe adjusting the flow of water is provided between the drain outlet 21 and joint member 3.
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