Travelling support arm used for flaw detecting and positioning of welded joint of petroleum pipeline

Abstract

The invention provides a travelling support arm used for flaw detecting and positioning of a welded joint of a petroleum pipeline. The travelling support arm comprises hollow bolts, hollow rods, sliding rods, pistons, mounting plates, universal ball wheels, movable rods, springs, shells and studs. The hollow rods are arranged at the outer ends of the hollow bolts, the sliding rods are arranged at the outer ends of the hollow rods, the pistons are mounted at the inner ends of the sliding rods and inside the hollow rods, and according to the design, travelling mechanism can be extended or shortened conveniently, and the travelling support arm is enabled to be used for flaw detection in different diameters of pipelines. The movable rods are arranged at the inner ends of the universal ball wheels, the springs are arranged at the inner ends of the movable rods and inside the shells, the studs are arranged at the inner ends of the shells and on the mounting plates, and according to the design, convenience in replacement is realized. The travelling support arm is further provided with an automatic popping mechanism, and thereby being ensured to cross a weld joint or a barrier in case of coming across the weld joint or the barrier. The travelling support arm is convenient to use, large in application range, high in working efficiency and high in reliability.

Description

technical field [0001] The invention relates to a walking support arm for flaw detection and positioning of welded joints of petroleum pipelines, which belongs to the technical field of pipeline flaw detection and positioning. Background technique [0002] Petroleum, one of the main objects of geological exploration, is a viscous, dark brown liquid known as the "blood of industry." There are oil reserves in parts of the upper crust. The main component is a mixture of various alkanes, naphthenes and aromatic hydrocarbons. Petroleum is mainly used as fuel oil and gasoline, and is also a raw material for many chemical industry products, such as solutions, fertilizers, pesticides and plastics. Petroleum is usually transported by pipelines, so the welding seams of pipelines require higher welding quality. [0003] The length of the support arm on the existing oil pipeline welded joint flaw detection machine is fixed, so that the flaw detection can only be carried out on a pipe ...

AI Technical Summary

Problems solved by technology

[0003] The length of the support arm on the existing oil pipeline welded joint flaw detection machine is fixed, so that the flaw detection can only be carried out on a pipe with one diameter. When it is necessary to carry out flaw detection on a pipe with a different diameter, it is necessary to replace the support arm with a different length, and the scope of application is poor. , the walking wheels on the existing oil pipeline welding joint flaw detection machine are connected by welding. When the walking wheel needs to break down, it cannot be replaced and maintained, which affects the normal walking work. Or obstacles, can not pass, reduce work efficiency

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