吊钩在工程地质钻探中广泛应用,用于钻具的提升和频繁的吊锤冲击。 DPP—100型汽车钻机自带一个3t吊钩,不但体积大、笨重,而且常使提挂物脱落,特别是在标准贯入试验中更为明显,至使吊锤坠落,或碰坏碰伤机械与井口工作人员。第1次改进为卸甲(图1),卸甲虽安全,提挂物不易脱落,但重量轻,不能克服 Hooks are widely used in engineering geological drilling for the lifting of drilling tools and frequent hammer impacts. DPP-100 car drilling rig comes with a 3t hook, which is not only bulky and bulky, but also often brings lifting objects off, especially in the standard penetration test, so that the hammer falls, or touch bumps Machinery and wellhead workers. The first improvement is to dismantle the armor (Figure 1). Although the armor removal is safe, the lifting object does not fall off easily, but the weight is light and cannot be overcome.