Portable laser cutting auxiliary device for large-diameter petroleum or natural gas transportation steel pipe

Abstract

The invention belongs to the technical field of laser cutting and relates to a portable laser cutting auxiliary device for a large-diameter petroleum or natural gas transportation steel pipe. The lower bottom surface of a permanent magnet attracting hanging apparatus of a chain assembly is attracted to the outer cylindrical surface of a large-diameter steel pipe, a free end I and a free end II which are adjacent are connected, and sleeve roller chain sections are combined into a sleeve roller chain ring. A servo motor drives a chain wheel to rotate, then a chain wheel assembly drives a trolleyassembly to run together, a rear left trolley wheel, a rear right trolley wheel, a left steering wheel and a right steering wheel roll on the outer cylindrical surface of the large-diameter steel pipe, and a laser cutting gun cuts the pipe wall of the large-diameter steel pipe. The running direction is adjusted through an electric cylinder when the difference of pressure values measured by two tension pressure sensors is large. According to the portable laser cutting auxiliary device for the large-diameter petroleum or natural gas transportation steel pipe, disassembling, transportation and carrying are convenient, the device is suitable for field operation, labor is saved, the labor intensity is relieved, the size accuracy is improved, the cut surface is neat, the working efficiency is improved, intelligent and automatic welding equipment can be adopted, and the working efficiency and the welding quality of the whole engineering are improved.

Description

technical field [0001] The invention belongs to the technical field of laser cutting, and relates to a large-diameter steel pipe cutting device, in particular to a portable large-diameter oil or natural gas transportation steel pipe laser cutting auxiliary device. Background technique [0002] The precise cutting of small-diameter steel pipes is completed on a sawing machine, or on a CNC laser cutting device, which can ensure that the cutting end face and the axis of the steel pipe are perpendicular. However, it is more difficult to make the cutting surface perpendicular to the axis line of the steel pipe in some application occasions. For example, when working in the field, it is more difficult to make the cutting surface perpendicular to the axis line of the steel pipe for large-diameter steel pipes that are used to transport oil or natural gas and have a diameter of more than two meters. Furthermore, it is difficult to draw a diameter at the required position in the midd...

AI Technical Summary

Problems solved by technology

The drawn ring is not the diameter. If the end face shape error of a section of large-diameter steel pipe cut along the ring is too large, a wide seam will be generated when connecting with adjacent steel pipes or other components, which will hinder later welding and testing. The work brings more workload, reduces the work efficiency of the whole project, and is also prone to welding defects, which brings more quality hidden dangers to the project

Manual cutting is also difficult to ensure that the cutting surface is neat, and the uneven cutting surface will bring more workload to the later welding, and the chance of welding defects will also increase

Untidy cutting surfaces cannot be welded with intelligent and automated equipment, and can only be welded manually. It is difficult to improve the work efficiency and welding quality of the entire project.

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