Elongated large-range inside diameter measurer

Abstract

The invention relates to an elongated large-range inside diameter measurer with a range greater than 6,000mm. The elongated large-range inside diameter measurer comprises a scale body, a scale head and a scale tail, wherein the scale body comprises a main scale and an elongated bar, and the elongated bar is located between the main scale and the scale head; the main scale is formed by two segments which are connected by an anchor ear locker; the anchor ear locker comprises a pair of pipe joints, a center locating ring, a group of anchor ears which are in a ring form and combined by a plurality of arc segments; the pipe joints are respectively welded at the opposite ports of the two adjacent scale body segments; the external cylindrical surface of the pipe joint is provided with an annularwedge groove for matching the anchor ears; the crossing section of the end surface and the internal cylindrical surface of the pipe joint is provided with a locating step spigot; the center locating ring is positioned in the locating step spigots of the two pipe joints; a plurality of screw holes are distributed on the circumference surface of the center locating ring; the section of the anchor ear is in a U shape, and a pair of tapered wedges are arranged at the ears of the anchor ears; the tapered wedges are matched with the wedge grooves of the pipe joints; the anchor ears are connected with the center locating ring by screws; and the tapered wedges of the anchor ears tightly wedge the two pipe joints so that the two segments of the main scale can be connected fixedly. The elongated large-range inside diameter measurer can meet the measuring requirements of large-size workpiece.

Description

technical field [0001] The invention relates to a length measuring tool, in particular to an extension-type large-capacity inner diameter measuring tool. Background technique [0002] At present, my country's manufacturers of large-scale inner diameter micrometers include Chengdu Measuring Tools and Cutting Tools Co., Ltd., Qinghai Measuring Tools and Cutting Tools Co., Ltd. and Harbin Measuring Tools and Cutting Tools Group Corporation, etc., with a maximum range of 6000mm. Exceeding this size, due to material and structural reasons, the deformation of the ruler body is large, which is still in the exploration stage at home and abroad, and there is no finished product for procurement at home and abroad. In order to meet the requirements for precision measurement of large inner diameters in the industrial processing of large equipment, such as the precision measurement of large inner diameters exceeding 6000mm for the Three Gorges hydroelectric generator set, some domestic c...

AI Technical Summary

Problems solved by technology

Its advantages are stable indication, direct measurement, and no need for operators to extend it, but there are also serious problems: First, it can only measure a single size and cannot be extended

It is impossible to solve the occasions that need to measure a series of dimensions, and often need to be equipped with multiple integral inner micrometers. Second, the cost of the integral inner micrometer for transportation packaging is too high

Since the size of the integrated inner micrometer sent to the installation site of the power station is usually more than 7000mm, a large truck of more than 10 tons is required to transport a measuring tool of only more than 20 kilograms, and multi-layer packaging of anti-collision and anti-vibration variants is more convenient increased production costs

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