通过分析套筒掉落问题,提出了一种钢管扣件式支架专用锁紧套筒,以防止紧固螺栓时因六角套筒掉落而造成的安全事故的发生,并针对扣件拧紧扭矩问题,提出了一种设定扭矩值的隧道专用扳手,指出该扳手可根据需要设定扭力值,从而达到控制扣件拧紧力矩的目的。 By analyzing the sleeve drop problem, this paper proposes a special locking sleeve for the steel tube fastener bracket to prevent the occurrence of safety accidents caused by the drop of the hexagonal sleeve when fastening the bolt, and in view of the fastening torque problem of the fastener , A kind of tunnel special wrench with torque value was put forward. It was pointed out that the wrench could set the torque value according to the need, so as to achieve the purpose of controlling the fastener tightening torque.