A real-time monitoring device and method for TBM hob loss state

Abstract

The present application discloses a real-time monitoring device and method for TBM hob loss state, including a data collection and sending module, a loss sensing module and a processor, the loss sensing module includes reeds and strain gauges, and the strain gauges are attached to Lay on the reed, one end of the reed is fixed, the other end is pressed against the hob to form an arc, and one end of the reed pressed against the hob is used to receive the action of the hob to generate vibration. The data acquisition and sending module The vibration signal of the reed is measured by the strain gauge and sent to the processor. The processor receives the vibration data and compares it with the vibration signal database of the hob loss state to judge the hob loss state. On the basis of the disk structure and non-stop, under the working state of the TBM, it can effectively monitor the various loss forms of the hob in real time, and avoid the impact of the rock slag attached to the hob on the monitoring.

Description

technical field [0001] The present application relates to a real-time monitoring device and method for the loss state of a TBM hob. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] In recent years, Tunnel Boring Machine (TBM) has been widely used in tunnel engineering. Among them, the hob is the main component of TBM rock breaking, and its wear state is directly related to the excavation efficiency, construction quality, and construction safety. It is one of the key points that TBM tunnel construction technicians pay attention to during construction. [0004] The wear state of the hob can be divided into two types: normal wear and abnormal wear. Normal loss refers to the gradual wear of the cutter ring of the hob until it is worn to the limit state and cannot be used any longer; abnormal wear and tear mainly includes cutter ring crackin...

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Problems solved by technology

[0005] The inventors have found that, at present, in order to monitor the loss state of the hob, domestic and foreign scholars have proposed many monitoring methods, mainly including adding odor additives, adding hydraulic sensor systems, preset coils, etc., which need to be carried out on the structure of the hob and the cutterhead. The problem with this type of method is that the structure of the hob and cutter head needs to be modified, which affects the rock-breaking ability of the hob itself, and is difficult to implement and difficult to promote; another type of method is to use sound waves, infrared rays, etc. Or laser monitoring and other means to directly measure the loss state of the hob. This method is easily affected by the interference of rock slag and groundwater on the hob, which will affect the measurement results, and it is difficult to monitor the cutting edge and the collapse of the cutting ring. The abnormal loss of hobs such as blades; the above methods are difficult to meet the existing demand for real-time grasp of the loss status of TBM hobs

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