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河北平原山前地带广泛分布着巨厚的砂卵石层,其下为富水的灰岩。以往,在勘察、开采地下水时,都采用换钻机的办法,即先用冲击钻机打砂卵石,见基岩后再改用回转钻机打灰岩。实践表明,这种办法有很多缺点。因此,河北省城市勘测大队就提出,将CZ-30型冲击钻机和SPZ-300型回转钻机改成冲击回转两用钻机。两用钻机的改装须保持冲击、回转这两种原有的性能,并达到:性能良好、传动合理、节约动力、折装简便、提高效率。为此,根据实际需要与可能,我队决定以CZ-30型钻机为主进行改装。改装后的两用钻机如照片
Hebei plain piedmont widely distributed with thick sand and gravel layer, which is rich in limestone. In the past, when surveying and exploiting groundwater, we adopted the method of changing drilling machines, that is, we first used the impact drill to hit the sand and pebbles. After we saw the bedrock, we switched to the rotary drilling machine to play the limestone. Practice shows that this approach has many shortcomings. Therefore, Hebei Province Urban Survey Brigade proposed that the CZ-30 impact drill and SPZ-300 rotary drilling machine into impact rotary dual-purpose rig. Modified dual-use rig to maintain the impact of the two original rotation performance, and to achieve: good performance, reasonable transmission, saving power, folding and simple, improve efficiency. To this end, according to the actual needs and possibilities, our team decided to CZ-30 drilling rig based modification. Modified dual-use drill as photos