| 摘要 |
PURPOSE:To prevent the leak of working steam by forming the inlet part of a drain discharge hole formed on the bottom part on the lower half side of a drain catch into semispherical form and installing a float and a cover for preventing the floatation of the float in close to the inlet part. CONSTITUTION:A drain collecting groove 13 is formed on the bottom part 12 on the lower half side of a drain catch, and a drain discharge hole 14 which communicates to an exhaust chamber is formed in the collecting groove part 13. The inlet part 15 of the discharge hole 14 is formed into a semispherical groove, and a spherical float 16 smaller than the semispherical groove and a cover 17 for preventing the floatation of the float 16 are arranged at the inlet part 15. Further, a groove 18 for accommodating the float 16 when it is floated-up is formed onto the cover 17. Further, in order to facilitate the drain catching, cut parts 19 for introducing drain and a roof 20 are formed into the collecting groove 13 and the cover 17. Therefore, only the drain is discharged, and the leak of the working steam having effective energy can be prevented. |
