| 摘要 |
A measuring device for obtaining inlet invert measurements, pipe invert measurements, and pipe diameter measurements includes an invert measuring rod having a plurality of rod segments, each a threaded bore at a first end and an axially extending threaded stud at a second end, a foot assembly comprising a guide rod removably connected to and extending perpendicularly from the bottom of the lower segment of the continuous rod, when connected having a free end opposite the connecting with the invert measuring rod with a bottom conical foot connected to and extending downwardly from the free end of the guide rod and parallel to the invert measuring rod, the bottom conical foot having an axial length the same as axial length of the conical rod tip, and extending from the free end of the guide rod parallel to the invert measuring rod and a diameter measuring sleeve, having a tubular portion positionable concentrically about the invert measuring rod and having an inner diameter just greater than the outer diameter of the invert measuring rod to create a friction fit therebetween permitting sliding movement of the tubular portion along the length of the invert measuring rod to a selected position and retaining the tubular portion at the selected position on the rod with a measurement scale disposed lengthwise on the tubular portion with numerical indicators of measure increasing from the collar to the bottom of the tubular portion.
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