Straightness quality detection device hangs down

The utility model discloses a straightness quality detection device hangs down, including handheld cover, measuring stick, the measuring stick lower extreme has plastic sleeve through interior matching the external screw, and the measuring stick upper end is equipped with inner tapped blind hole, is equipped with the through -hole in the handheld cover, and the through -hole top be the internal thread hole, and the extension rod upwards passes the through -hole and cooperatees with the internal thread hole in the handheld cover, the extension rod lower extreme have with the measuring stick onthe inner tapped blind hole external screw thread that cooperatees. Instrument through simple easy system solves the straightness that hangs down and detects the problem, through detecting the well drilling straightness that hangs down, inspects into the well quality, ensures well drilling effective depth and heat transfer volume, the utility model discloses the cost of manufacture is low, and theeffect is obvious, but re