Pressure type bolt elongation measuring tool

Pressure bolt elongation measuring ruler (hereinafter referred to as measuring ruler) is a special measuring tool for measuring the length of steam turbine cylinder bolts before and after hot tightening. The biggest feature of the pressure bolt measuring ruler developed by our company is that when measuring the length of the same bolt before and after thermal tightening, the pressure of the pressure plate of the measuring ruler is the same under the action of the pressure spring. Therefore, the measurement of bolt elongation before and after hot tightening is more accurate. At present, the product has applied for a national invention patent.