| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling water filtration system for a concrete drill to easily discard a solid waste containing drilled chips or the like after a filtration and to improve an efficiency of a whole of a drilling work. SOLUTION: The filtration is carried out by taking bag filters 13a and 13b formed as a bag shape of a filtering material and the upper side of which is open in closed containers 14a and 14b connecting with a concrete drill 2, at the same time, by alternatively connecting the hermetic containers 14a and 14b with a means of generating a negative pressure 15 and a means of generating a positive pressure 16 through a means of switching 17, by generating the negative pressure in the hermetic containers 14a and 14b to suck and recover a turbid cooling water from a concrete drill 2 into the bag filter 13a and 13b and then by giving an overpressure to the turbid cooling water in the bag filter 13a and 13b to filtrate it of the hermetic containers 14a and 14b. COPYRIGHT: (C)2004,JPO&NCIPI
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