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Working and abrasion state on-line detection method for shield hob

A wear state and detection method technology, which is applied to measuring devices, devices and instruments that measure the time required to move a certain distance, etc., can solve the problems of complex detection devices or methods, affecting the accuracy of real-time monitoring, etc., and achieve a simple and convenient detection method. Easy to operate, ensure smooth progress, and ensure the effect of work efficiency

Inactive Publication Date: 2014-10-22
SHIJIAZHUANG TIEDAO UNIV +2
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  • Abstract
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AI Technical Summary

Problems solved by technology

The detection devices or methods in the above two patents are relatively complicated, and the wear state of the hob must be obtained through calculation, and the processing speed will affect the accuracy of real-time monitoring

Method used

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  • Working and abrasion state on-line detection method for shield hob

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Embodiment Construction

[0020] As attached figure 1 The shown shield hob motion state and wear online detection device consists of two eddy current sensors, a collection circuit and a host computer. Among them, a distance measuring eddy current sensor needs to be installed on the cutter body aligned with the shield hob, and Weld two symmetrical cemented carbide bumps on the cutter body; align the other ranging eddy current sensor at the cutter ring of the hob. The eddy current sensor aligned with the cutter body of the shield hob is used to measure the speed of the hob by distance measurement and the time of two bulges; the eddy current sensor aligned with the hob ring is used to measure the distance Change, judge the wear status of the hob. Among them, the acquisition circuit is a 4-20mA transfer serial port acquisition module.

[0021] The specific detection process is as follows:

[0022] First, the hob is used to measure the current and distance curve of the sensor for measuring the tool wear, reco...

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Abstract

The invention discloses a working and abrasion state on-line detection method for a shield hob and is applied to the technical field of shield construction. A detection device comprises two electrical vortex sensors, an acquisition circuit and an upper computer, the rotating speed of the shield hob is measured through one electrical vortex sensor, the abrasion loss of the hob is measured through the other electrical vortex sensor, and thereby, the moving state and the abrasion state of the hob can be determined. The working and abrasion state on-line detection method for the shield hob has the advantages that the moving state and the abrasion state of the shield hob can be timely monitored, a test method is convenient and easy to implement, a test result is accurate, the moving state and the abrasion state of the hob can be timely monitored so as to timely replace the hob, unnecessary loss caused by too early or late replacing of the hob can be reduced, and safe and smooth shield construction can be guaranteed.

Description

Technical field [0001] The invention belongs to the technical field of shield construction. Background technique [0002] With the widespread use of shield machines in China, tool wear has become a key issue affecting project quality and progress. The completeness of the tool and the judgment of the wear state of the tool are the key factors in the normal tunneling of the shield. How to judge the motion state and wear state of the tool is very important to the safe tunneling of the shield. When the tool wear reaches a certain level, it must be replaced immediately, otherwise it will increase the load of adjacent tools, accelerate the wear rate of the remaining tools, and form a vicious circle. Therefore, accurate judgments on the movement and wear status of the tools and timely guidance The replacement of the tool is very important. [0003] After searching, the patent number is CN103472247A, which discloses an online monitoring device for the rotation speed of the TBM hob. The d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/66G01B7/02
Inventor 郭京波杨绍普牛江川周阳宗章卫刘进志李杰赵红霞
Owner SHIJIAZHUANG TIEDAO UNIV
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