Detection mechanism of robot for detecting corrosion of in-service large crude oil storage tank

Abstract

The invention discloses a detection mechanism of a robot for detecting the corrosion of an in-service large crude oil storage tank. The detection mechanism comprises a hinged support, a support rod, adetection rod, a connection piece, and an ultrasonic thickness measuring probe. The hinged support positions the support rod and the detection rod, and the support rod and the detection rod can rotate oppositely relative to each other. The support rod is a secondary hydraulic cylinder, the first stage is a common piston cylinder, and the second stage piston rod and a spring can realize telescoping. The detection rod is a single stage and double effect hydraulic cylinder. Explosion resistance of oil gas is taken into account, and a spring wire for signal transmission is arranged in the cylinder and connected to threaded plugs on two ends of the cylinder. The tail end of the piston rod and the ultrasonic probe are connected by an elastic element to realize grounding buffer. During the process of detection, the support rod pushes out the detection rod, the detection rod penetrates the oil sludge and contacts with the bottom plate of a crude oil storage tank to measure the thickness, after measuring, the detection rod retracts, and the support rod draws back the detection rod. The provided detection mechanism can avoid barriers in the bottom of a crude oil storage tank such as heatingcoiler, and the like, can accurately measure the thickness of the bottom plate, and improves the online storage tank corrosion detection efficiency.

Description

technical field [0001] The invention belongs to the technical field of on-line detection of storage tank corrosion, in particular to a detection mechanism of a corrosion detection robot for large crude oil storage tanks in service. Background technique [0002] At present, the number of oil storage tanks in our country is huge, so the safety of oil storage tank operation is becoming increasingly prominent. The main hidden danger affecting the safe operation of oil storage tanks is the oil leakage caused by the corrosion of the bottom plate of the storage tank. Therefore, regular storage tank safety monitoring is required. and evaluation, check the corrosion of storage tanks, prevent oil leakage and safety accidents after leakage. At present, domestic storage tank defect detection generally adopts regular tank opening inspection measures, but tank opening inspection generally requires shutdown and tank cleaning, which requires a lot of manpower and material resources. Therefo...

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Problems solved by technology

[0003] Aiming at the fact that the existing online detection robot cannot detect the corrosion of the bottom plate of the storage tank when there are obstacles on the bottom plate of the storage tank, the invention discloses a detection mechanism for a corrosion detection robot of a large crude oil storage tank in service

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