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Oil seal type dial indicator settlement gauge

A dial indicator and settlement instrument technology, applied in instruments, measuring devices, surveying and navigation, etc., can solve the problems of poor long-term reliability, low observation accuracy, easy corrosion of measuring and reading components, etc., and achieves low material costs and processing costs. High observation accuracy, overcoming the effect of easy rust

Inactive Publication Date: 2012-09-12
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI +1
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  • Abstract
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Problems solved by technology

[0022] The purpose of the present invention is to solve the problems of low observation accuracy, easy corrosion of measuring and reading elements, and poor long-term reliability in the existing tunnel roof settlement observation technology, and proposes a high observation accuracy, anti-corrosion, high long-term reliability, and observation Convenient, low-cost oil-sealed dial indicator for long-term monitoring of roof settlement in underground caverns

Method used

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  • Oil seal type dial indicator settlement gauge
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Embodiment Construction

[0045] Such as figure 1 The basic structure of the oil-sealed dial gauge settlement instrument shown can be used for cave roof settlement monitoring. The settlement instrument includes: a hanging piece, at least one measuring rod 8, a dial indicator 15, a measuring cylinder 13 and a support. There is a fixed connection between the hanging part and the target to be measured (the roof of the cavern), and a detachable connection between the measuring rod 8 and the hanging part. The hanging embedded part 4 is buried in the target to be tested, the hanging ring 6 and the hanging embedded part 4 are threaded, the hook 7 and the hanging ring 6 are connected, and the other end of the measuring rod 8 and the hanging hook 7 is threaded. connect.

[0046] The dial indicator 15 is located in the measuring cylinder 13 and is submerged in kerosene, and is detachably connected with the measuring rod 8 . The measuring cylinder 13 may be transparent, and includes an open end, a closed end, ...

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Abstract

The invention provides an oil seal type dial indicator settlement gauge comprising a hanging piece, at least one measuring rod, a dial indicator, a measuring cylinder and a supporting piece, wherein the hanging piece is fixedly connected with a target to be measured; the measuring rod is detachably connected with the hanging piece; the dial indicator is arranged in the measuring cylinder, immerged in kerosene and detachably connected with the measuring rod; the lower part of the measuring cylinder is detachably connected with the supporting piece; and the supporting piece is fixedly connectedwith a reference object. The oil seal type dial indicator settlement gauge has the obvious advantages of high measuring precision, corrosion resistance, convenient measurement, high long-term reliability, relatively low cost and the like.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering observation, in particular to an oil-sealed dial indicator settlement instrument. Background technique [0002] For the development and utilization of modern underground engineering, ancient underground engineering, and natural caves, cavern stability evaluation is one of the necessary tasks to ensure engineering safety and personnel safety. Engineering practice and theoretical analysis show that roof settlement monitoring is not only an important basis for cavern stability evaluation, but also the basis for evaluation of underground engineering reinforcement requirements and reinforcement effects. With the rapid development of science and technology, there are currently three types of technologies that can be used to monitor cavern roof settlement. The corresponding functions and characteristics are as follows. [0003] (1) Drilling Extensometer [0004] The so-called borehole ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/02G01C5/00
Inventor 张路青杨志法王学良陈岗郑舰刘恩聪
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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