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为了与辽煤9型塔上无人提引器配套使用，我们设计成一种拧在钻杆锁接头上的固定卡头，可随钻杆立根下孔，每次升上或降下钻具时，不必再拧卸卡头。只要插好垫叉，挂上提引器就可提升。经二年来的试验效果是良好的，我公司已基本全面推广。一、固定卡头的优点1．可以代替活卡头，减去了用活卡头时每次上下钻具拧卸的麻烦；2．能预防孔斜，因它随钻具下孔，直径大，钻具旋转稳定；3．减少钻杆锁接头的磨损，增加了使用寿命，一般的能延长锁接头寿命一倍左右；
In order to be used with LiaoChai 9 tower unmanned elevators, we designed a fixed chuck that is screwed onto the drill pipe lock. When the drill chuck is lifted and lowered, No need to unscrew the chuck. Just plug in the fork, lift the indexer to lift. After two years of test results are good, our company has basically comprehensive promotion. First, the advantages of fixed chuck 1. You can replace the live card head, minus the trouble of unscrewing the top and bottom drill when using the live card head; 2. Hole can prevent slant, because it is with the hole under the drill, large diameter, drill rotary stability; 3. Reduce the wear and tear of the drill pipe connector, increase the service life, generally can extend the life of the lock connector about double;