Retractable automatic-spin defect detecting and positioning device for storage tank walls

Abstract

The invention relates to a retractable automatic-spin defect detecting and positioning device for storage tank walls and particularly for defect detection of small and medium sized storage tanks. The retractable automatic-spin defect detecting and positioning device is capable of determining specific location of defects in the storage tanks and providing accurate data for maintenance of the storage tanks. The technical scheme includes that the main body of the retractable automatic-spin defect detecting and positioning device comprises screws capable of being telescoped one by one, three sets of retractable connecting rods and a triangular platform; a signal analysis device is arranged on the triangular platform and a drive motor is mounted above the triangular platform; a screw reciprocating system consists of the screws and the long shaft, and key slots in the screws match with keys in a spinning box; a radial pressing system consists of a cross-spin sleeve, a radial pressing sleeve, a long shaft and a spring; a retractable connecting rod system consists of three sets of connecting rods and ultrasonic array probes are mounted at tail ends of the connecting rods; a signal analysis device comprises a signal conditioning circuit, a signal acquisition circuit, a controller, a storage unit and a display. The retractable automatic-spin defect detecting and positioning device brings convenience to detection, is easy to operate and control, improves safety in detection, reduces detection cost and improves detection precision and accuracy.

Description

technical field [0001] The invention relates to a retractable spin-in storage tank wall defect detection and positioning device for defect detection of small and medium-sized storage tanks. It uses an ultrasonic array probe to detect defects and determine the specific position of the defect on the tank wall. It is suitable for petrochemical mechanical field. Background technique [0002] With the rapid development of the petrochemical industry, more and more people pay more and more attention to the efficiency and safety of oil and gas gathering and transportation. Among them, storage tanks play an important role in oil and gas gathering and transportation. The continuous development of technology and industrial needs make the volume of storage tanks become larger and larger, and the safety of storage tanks is also attracting more and more attention. Leakage can be said to be the most deadly safety hazard of storage tanks. Oil and gas leakage can lead to environmental pollu...

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Problems solved by technology

[0003] Exhaustive research has been carried out on the detection of tank wall defects at home and abroad. The X-ray inspection crawler for the butt weld of the storage tank wall plate developed by Sinopec Pipeline Storage and Transportation Company, the X-ray machine performs horizontal and vertical movements on the tank wall. It can only detect the defects of the specified welds on the tank wall, and the harm of X-rays to the human body cannot be underestimated; the ultrasonic B-scan automatic crawling wall thickness detection system produced by the British SilverWing company uses ultrasonic dry coupling technology to detect Line scanning of the tank wall, the disadvantage is that the detection speed is only 25mm / s, and the data is greatly affected by the surface condition of the tank wall; the magnetic flux leakage detection device for underground oil storage tank defects (Chinese patent: 201310698431. Realize defect location, and the magnetic flux leakage detection cycle is longer

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