10-02-2011 дата публикации
Номер: KR2011016642A2
Принадлежит:
The present invention provides an oil-pressure type fixed piston sampler for sampling soil for site investigation. The oil-pressure type fixed piston sampler comprises a sampling unit (12) and an oil-pressure controller (14). Here, when the sampling unit (12) inserted into a drilled hole and a movable piston (80) moves downward, a sampling tube (1) moves downward to take a sample. The oil-pressure controller (14) connected with the sampling unit (12) controls oil pressure to cause the movable piston (80) to shift vertically. The sampling unit (12) comprises an upper head (20), a lower head (40), a piston housing (70), a rod block (100), a movable rod (90), a fixed piston (110), a fixed rod (92) and a separation rod (94). For taking a sample into the sampling tube (1), the oil-pressure type piston sampler (10) according to the present invention is inserted into a drilled hole, with the upper head (20) being fixed to drilling equipment and the oil-pressure controller (14) moves the movable ...
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