Scissorlike enlarged head anchor drill hole inner diameter measuring device

Abstract

The invention provides a scissorlike enlarged head anchor drill hole inner diameter measuring device. The scissorlike enlarged head anchor drill hole inner diameter measuring device comprise a first measuring rod (2) and a second measuring rod (3) which are symmetrically arranged at two sides of a vertical rod (1); the middle portions of the first measuring rod (2), the second measuring rod (3) and the vertical rod (1) are hinged together through a shearing shaft (4); the upper ends of the two measuring rods are connected with two ends of a telescopic rod (5) respectively; the rod body of the telescopic rod (5) is shelved with a first sleeve (6); the first sleeve (6) is connected with the upper end of the vertical rod (1); the lower end of the second measuring rod (3) is connected with one end of an extendable ruler (7); the other end of the extendable ruler (7) is inserted into a second sleeve (8); the second sleeve (8) is connected with the lower end of the first measuring rod (2); and the lower end of the vertical rod (1) is fixed to the extendable ruler (7). With the measuring device adopted, the inner diameter and depth of the enlarged head of an anchor drill hole which is unevenly expanded can be measured fast and accurately, and therefore, measuring time can be greatly saved, and measuring efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of anchor hole inner diameter measurement, in particular to a scissors-shaped expansion head anchor hole inner diameter measurer. Background technique [0002] For the measurement of the inner diameter of deep holes, the commonly used methods are manual observation and comparison with rulers or measurement with inner diameter calipers, but the inner diameter of deep anchor holes cannot be quickly and accurately measured, which greatly reduces the accuracy of test results. Moreover, the expansion head of the anchor hole expands unevenly, which makes it more difficult to measure the diameter of the deep anchor hole. Contents of the invention [0003] In view of this, the present invention provides a scissors-shaped expansion head anchor hole inner diameter measuring instrument. For the unevenly expanded deep hole large-diameter anchor hole expansion head, the instrument can quickly and accurately measure the...

AI Technical Summary

Problems solved by technology

[0002] For the measurement of the inner diameter of deep holes, the commonly used method is to manually observe the comparison method through a ruler or use the inner diameter caliper measurement method, but it is impossible to quickly and accurately measure the inner diameter of the deep anchor hole, which greatly reduces the accuracy of the test results.

Moreover, the expansion head of the anchor hole expands unevenly, which makes it more difficult to measure the diameter of the deep anchor hole.

Images