A real-time monitoring device for tbm hob wear

Abstract

The invention discloses a real-time tunnel boring machine (TBM) hob abrasion monitoring device based on an inductive displacement transducer. The device is characterized in that the inductive displacement transducer is installed in a transducer base, a lead pin is connected onto the inductive displacement transducer, and the internal gap of the transducer base is filled by an AB glue. A zirconia protection sleeve and the transducer base are installed in a transducer positioning sleeve, and a waterproof rubber ring is assembled in a groove of the transducer positioning sleeve. A small waterproof rubber ring is sealed between the zirconia protection sleeve and the transducer positioning sleeve, and a large waterproof rubber ring is sealed between the zirconia protection sleeve and the transducer base. The transducer positioning sleeve is installed into round holes in the middle of the side surfaces of a cutter head reinforcing plate and a tool apron, and the transducer base and the cutter head reinforcing plate are fixed into a whole through bolts. Hob abrasion signals which are detected by the inductive displacement transducer are processed by a signal transformer and then transmitted in a wireless manner. The device can be suitable for severe working environments of a hob and monitors the hob abrasion in real time.

Description

technical field [0001] The invention belongs to the detection technology of large-scale construction equipment, and specifically designs a device for on-line monitoring of the wear amount of a disc-shaped hob used in TBM construction. Background technique [0002] TBM is a large-scale equipment for tunnel and subway construction. The hob is used as a cutting tool for TBM excavation and rock breaking. Its wear will cause obstruction of excavation, lower excavation efficiency, and affect the quality of TBM construction. At the same time, because the TBM works underground, the hob is in contact with the rock, and the dust is serious, and the host cabin, cutter head, and hob are surrounded by rock-soil media and groundwater, which interferes a lot with laser, infrared, and ultrasonic signals, resulting in hob failure. Monitoring is very difficult. [0003] At present, the hob monitoring methods mainly include shutdown inspection method, threshold value detection method and tun...

AI Technical Summary

Problems solved by technology

In the stop inspection method, the construction personnel enter the cutter head to inspect and perform operations in the stop state. Although the inspection method is intuitive, the workload is heavy; the threshold detection method mainly uses additives to judge the wear state of the cutter, but this method can only It can only be effective when the amount of tool wear reaches a certain level, and the real-time monitoring of the wear state of the hob cannot be realized; the tunneling parameter estimation method mainly uses the empirical curve of the tunneling parameter under ideal geological conditions or the estimated value obtained by a semi-empirical formula. The amount of wear of the hob has a great relationship with the working environment of the hob, lack of universality, and the error rate is extremely high

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