| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-fluid simultaneous feeding structure which can simultaneously feed both slurry and air to an expansion rod 4 of a soil improving machine or the like, and bursts the two fluids out of an excavator-agitator. SOLUTION: According to the structure of the two-fluid simultaneous feeding structure for the expansion rod 4, an axial core hole 39 and a peripheral hole 40 on the periphery of the same are bored in an upper joint 9, and an axial core hole 42 and a peripheral hole 43 on the periphery of the same are bored in a lower joint 8. Each of the axial core holes 39, 42 is connected to an outer pipe 12 and an inner pipe 13 arranged at an axial core portion, and each of the peripheral holes 40, 42 is connected from an inner sheathing pipe 11 via an opening 36 and a through hole portion 38 to an outer sheathing pipe 10. COPYRIGHT: (C)2003,JPO
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