On-line monitoring device for tool wear of shield machine based on resistance row

Abstract

The invention discloses an on-line monitoring device for tool wear of a shield tunneling machine based on a resistance row type. inside the tool of the machine. The part where the resistor row contacts the cutter is filled with epoxy resin to ensure the insulation between the resistor row and the cutter. There is a rubber pad at the contact part between the resistance row base and the cutter, and the rubber pad also has a sealing effect, and the resistance row base is fixed with the cutter as a whole with a lock nut. There are three signal amplifiers on the cutterhead, three transmitting antennas are installed on the back of the cutterhead corresponding to the signal amplifiers, receiving antennas are installed on the inner wall of the soil pressure chamber opposite to the transmitting antennas, and signal receiving antennas are installed in the main cabin of the shield tunneling machine. device. The invention can predict the wear state of the excavating tool on-line, effectively reducing or avoiding the occurrence of huge economic losses, personal casualties and other dangerous accidents caused by tool accident shutdown.

Description

technical field [0001] The invention belongs to the detection technology of large-scale construction equipment, and in particular relates to a device used for monitoring the amount of tool wear during the construction of a shield tunneling machine. technical background [0002] Shield boring machine is a large-scale equipment for tunnel and subway construction. The cutter head drives the cutter for excavation. The diameter of the cutter head used in subway construction is 6.2-6.4m. The cutter head cutter is the key component of the excavation, and it is also the most prone to wear and failure. The wear of the cutter mainly refers to the wear of the blade and the cutter body. The wear and tear of cutting tool also can endanger personal safety besides can't excavation. Real-time monitoring of tool wear during construction has become a core technology developed by foreign excavation equipment manufacturers. [0003] At present, there are two kinds of tool inspections: one is ...

AI Technical Summary

Problems solved by technology

Threshold detection technology has the following defects: (1) The warning signal is a switching threshold, which cannot realize continuous monitoring of wear; (2) Most of the sensor signals need to be transmitted by wire, which requires high wiring and is difficult to maintain

However, the estimated value obtained reflects the average value of the overall tool wear, and its reliability is affected by two factors: First, the empirical curve or empirical formula is suitable for a specific single geological condition and lacks universality

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