Vibrating screen crossbeam fault detection device and method

Abstract

The invention relates to a vibrating screen crossbeam fault detection device and method. The device comprises a low-frequency eddy current testing host, wherein a CPU (Central Processing Unit) is arranged in the low-frequency eddy current testing host; the CPU is connected with a signal generation module, a probe interface, a signal output module, an amplifier module, a phase sensitive detector, a filtering module, a phase rotator, an amplitude regulator, an A / D (Analog / Digital) conversion module, an impedance display screen, a loudspeaker, a storage device, an operation keyboard and a data charging interface; a probe device is inserted into the probe interface. The device has the beneficial effects that a method for detecting vibrating screen crossbeam fatigue cracks by using low-frequency eddy current is different from conventional eddy current, the low-frequency eddy current can penetrate through a coating layer so as to detect the crossbeam cracks, the device is low in cost, high in speed, and good in quantification and is used for early warning and nondestructive quantitative detection on vibrating screen fatigue crack faults, the detection result is reliable, and unscheduled shutdown caused by the faults is reduced, so that the economic loss is reduced, and economic benefits and social benefits are huge.

Description

technical field [0001] The invention relates to a fault detection device and detection method for a vibrating screen girder. Background technique [0002] Vibrating screen is a kind of vibrating mechanical equipment that uses the vibration characteristics of the screen body to complete the processes of sorting, grading, de-mediation and dehydration of materials. It is widely used in metallurgy, coal, mining, water conservancy and building materials and other occasions. Take the mining vibrating screen as an example, the mining vibrating screen is used to classify raw coal, recover media, dehydrate and remove waste. The vibrating screen is one of the key equipment in coal preparation production. Since the girder is one of the key parts of the mining vibrating screen, it plays the role of support and protection, and the girder bears the gravity and impact force of the screened material for a long time during the working process. And the effect of alternating exciting force, s...

AI Technical Summary

Problems solved by technology

[0003] The existing vibrating screen girder fault detection device cannot penetrate the cladding layer to detect girder cracks, has many shortcomings such as bulky shape, troublesome operation, high production cost, slow detection speed, and inaccurate detection results.

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