Inverted plumb line hole protection device

• Main Authors: GUO YOU'AN, LI HONGBO, YU YI, ZHAI LI, ZHA HAIHUA, WU GUANGYAO, WANG HAIYAN, ZHAO JIAYAO
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2023
• Subjects: GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING DISTANCES, LEVELS OR BEARINGS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

The utility model relates to an inverted plumb line hole protection device which comprises a combined support and a protection cover arranged above the combined support, a rectangular hole is formed in the center of the protection cover, a communicated strip-shaped groove is formed from one edge of the rectangular hole to the edge of the protection cover, the combined support is clamped on the outer side of a plumb line hole steel pipe, and a line body penetrates through the strip-shaped groove and then extends into the plumb line hole steel pipe. The protection device is simple in structure, convenient to install and suitable for inverted line holes of different environments and different hole diameters, the hole opening position of the protection device can be freely adjusted according to the position of an inverted line body so as to adapt to the relative position difference between line bodies of different inverted line holes and a protection steel pipe, line body displacement is not affected, the inverte