Wireless detecting device for rotating speed and abrasion of hobbing cutter of shield machine

Abstract

The invention discloses a wireless detecting device for rotating speed and abrasion of a hobbing cutter of a shield machine. The wireless detecting device comprises a protecting cover, wherein the protecting cover is arranged on a cutter disc; a first nut, a second nut and a battery are arranged in the protecting cover; the first nut is connected with a first tube sleeve; the first tube sleeve penetrates in a third nut fixed on a cutter box; a hobbing cutter self-rotation speed sensor is arranged on the top of the first tube sleeve; the second nut is connected with a second tube sleeve; an outer barrel is arranged on the top of the second tube sleeve; a hobbing cutter ring abrasion inductor is arranged in the outer tube; a cover plate is arranged on the top of the outer barrel; a fixing groove is formed in the protecting cover; and a wireless transmission antenna is arranged in the fixing groove. The wireless detecting device is simple in structure, small in size, convenient to mount, high in efficiency and reliable in operation, and can be directly mounted at a position of the hobbing cutter of the cutter disc; and the hobbing cutter ring abrasion inductor and the hobbing cutter self-rotation speed sensor can be positioned accurately through an adjusting nut, so that hobbing cutter abrasion and rotation can be wirelessly detected in real time, and the risk of breakage of the cutter disc due to excessive abrasion of the hobbing cutter is avoided effectively.

Description

technical field [0001] The invention relates to the technical field of tunneling equipment detection, in particular to a wireless detection device for the rotational speed and wear of a shield hob. Background technique [0002] With the development of the economy and the acceleration of urbanization, tunnels in cities such as subways, water conservancy and hydropower, highways, and railways all need shield machines for excavation. Shield machines are gradually popularized due to their safety and speed and many other advantages. During the tunneling and excavation process, the cutter head of the shield machine relies on the cutter installed on the cutter head structure to cut and break the rock and soil, such as the commonly used hob. With the widespread use of shield machines in China, tool wear has become a key issue affecting project quality and progress. The integrity of the tool and the judgment of the wear state of the tool are the key factors in the normal excav...

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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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