US 12,435,971 B2
Safety measuring device and safety evaluation method for large-diameter pipeline
Xiangqian Fan, Nanjing (CN); Jun Lu, Nanjing (CN); and Lei Zhang, Nanjing (CN)
Assigned to Nanjing Hydraulic Research Institute, Nanjing (CN)
Filed by NANJING HYDRAULIC RESEARCH INSTITUTE, Nanjing (CN)
Filed on Jun. 12, 2023, as Appl. No. 18/332,786.
Prior Publication US 2024/0068801 A1, Feb. 29, 2024
Int. Cl. G01B 11/12 (2006.01); G01B 5/12 (2006.01); G01B 11/16 (2006.01); G01B 11/24 (2006.01)
CPC G01B 11/12 (2013.01) [G01B 5/12 (2013.01); G01B 11/16 (2013.01); G01B 11/24 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A safety measuring device for a large diameter pipe comprising a section size measuring device and a curvature device; wherein
the curvature device for measuring curved lines;
the section size measuring device includes a base; a rotating platform is arranged above the base; a full-angle laser ranging device with a level hanging is around the base, the full-angle laser ranging device includes a dial, a pointer, and a laser range finder, and the laser range finder rotates with the pointer;
a rotation center coaxial is provided at middle of the dial with the rotating platform, the rotation center coaxial drives the dial to rotate with the rotating platform, and the dial is also provided with a pointer, the pointer points to the scale, and a laser rangefinder is provided at the connection between the pointer and the dial.