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目前使用的取土钻,消耗体力大,取土时间长,在旱情严重的情况下,一次取土(深度0—100厘米,4个重复)就达二小时以上。尤其是在深层土壤,无法使用这种取土钻取土,影响服务和科学研究。为克服这种缺点,我们在1965年底改制成螺旋刀片取土钻头,虽然提高了工作效率,但在土壤湿度大或粘土地上使用,效果并不很理想。在无产阶级文化大革命的推动下,我们在1967年上半年又改制成双刀尖头取土钻头。经过几年来的使用,效果较好,基本上达到了省力、速度快的要求。现将其构造和优点介
At present, earth borrowing drilling is used, which consumes great physical strength and takes a long time in taking soil. In the case of serious drought, soil borrowing (depth 0-100 cm and 4 repetitions) reaches more than two hours. Especially in deep soils, this type of earth-boring can not be used to extract soil and affect service and scientific research. In order to overcome this shortcoming, we reorganized the earth bit into a helical blade by the end of 1965. Although the working efficiency is improved, it is not very effective when used on the soil with high humidity or clay. Driven by the great proletarian cultural revolution, we reorganized into double-pole pointed earth-boring bits in the first half of 1967. After several years of use, the effect is better, basically reached the labor-saving, speed requirements. Now its structure and merit