Crane beam structure safety monitoring device with self-powered power supply

Abstract

The invention discloses a crane beam structure safety monitoring device with a self-powered power supply, which comprises a crack sensor, a vibration power supply and an automatic alarm; the vibrationpower supply is fixed to a lower flange of a crane beam, and the output end of the vibration power supply is connected with the crack sensor and provides monitoring current; the crack sensor is arranged on the surface of the structure, and the output end of the crack sensor is electrically connected with the micro-current measuring instrument; and the automatic alarm judges the crack state basedon the current change threshold values in the metal foil and the conductive film and sends out an alarm signal. According to the invention, strain data can be monitored, the coverage area is large, and the position, length and width changes of cracks can be monitored; the vibration characteristics of the monitored object are utilized to provide current for the monitoring device, a workshop power supply system is not needed, installation is convenient, and long-term effective monitoring can be achieved.

Description

technical field [0001] The invention relates to a safety monitoring device for a crane beam structure with a self-powered power supply. Background technique [0002] The crane beam is an important structural component in the industrial plant, and its safe use plays a vital role in the normal production of the industrial plant. The crane girder is subjected to the alternating load of the crane for a long time, and the structure is prone to fatigue cracks. In order to ensure the safety of the crane girder structure, it is necessary to detect the development of fatigue cracks in the crane girder in time to avoid fatigue fracture. [0003] At present, the main method for safety inspection of fatigue cracks in crane beam structures is manual inspection. However, there are a large number of crane girders in industrial plants, and regular safety inspections of the crane girders require heavy workload and high costs. When cracks propagate in crane girders, not only are the initial...

AI Technical Summary

Problems solved by technology

However, there are a large number of crane girders in industrial plants, and regular safety inspections of the crane girders require heavy workload and high costs.

When a crack propagates in a crane girder, not only the initial crack is relatively small, but the surface is often covered with dust, and due to the narrow space, it is often difficult to inspect it manually

Affected by the above factors, even if the safety inspection of the crane beam is carried out regularly, it is difficult to find some cracks in time

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