Bolt fastening state monitoring device and use method thereof

Abstract

The invention relates to a bolt fastening state monitoring device and a use method thereof. The device disclosed by the invention comprises a circular column elastic gasket, wherein the lower part of the elastic gasket is radially provided with a trough which penetrates through a circular column; the lower part of the elastic gasket form two arc-shaped landing legs; the top of the mouth of the trough is provided with a pressure strain gauge; two sides of the upper part of the elastic gasket are provided with two sections of arc-shaped notches in parallel with the trough; the upper part of theelastic gasket forms two arc-shaped bosses which form an angle of 90 degrees with the arc-shaped landing legs; the pressure strain gauge is connected with a signal amplifier by virtue of a lead; the signal amplifier is connected with a data acquisition device by virtue of a data line; the data acquisition device is connected with the original computer monitoring equipment by virtue of a data line; and the computer monitoring equipment compares a data signal value collected at fixed period with a preset alarming threshold value so as to judge whether an alarming measure is adopted. The bolt fastening state monitoring device has the advantages of being low cost, safe to operate and almost free from manual participation, and can be widely applied to the production and scientific research fields of hydropower stations and the like which comprise pressure containers and need to fasten bolts.

Description

technical field [0001] The present invention relates to a monitoring device and its use method, in particular to a monitoring device and its use method for monitoring the status of bolts (or nuts, hereinafter referred to as bolts) fastened on electromechanical equipment. Background technique [0002] With the rapid development of science and technology, the installed capacity of hydropower stations at home and abroad has a tendency to increase continuously, and the capacity of a single unit is also increasing. The increase of stand-alone capacity can greatly reduce the project cost and reduce the cost, but it may also reduce the stability due to the reduction of relative stiffness, induce accidents, and may even cause more serious damage. For example, on August 17, 2009, a serious accident occurred at the Sayan-Shushensk Hydropower Station in Russia. Afterwards, the accident investigation organized by the Russian government concluded that: "The damage of the bolts caused by ...

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Problems solved by technology

[0003] However, due to the lack of deep understanding of the hazards of bolt loosening in the past, effective monitoring methods have been lacking.

At present, there are two possible monitoring methods: regular or irregular patrol inspection is the easiest to think of, and its disadvantages are high cost, high dependence on the responsibility and work attitude of patrol inspectors, and it is difficult to avoid sudden incidents The other is to set up monitoring cameras at the bolts and bolt installation positions, and introduce video signals into the central control room for monitoring. The disadvantage is that the central control room may not be able to see clearly after the bolts are loose, and it is too dependent on the monitoring personnel.

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