Low-temperature liquid tank container barrel butt-joint tool and butt-joint welding method

Abstract

The invention discloses a low-temperature liquid tank container barrel butt-joint tool and a butt-joint welding method. The butt joint tool comprises a barrel body positioning device and a barrel opening coaxial butt joint device. The barrel body positioning device comprises a base and a pair of barrel body supporting and rotating assemblies arranged on the left side and the right side of the upper portion of the base. The cylinder opening coaxial butt joint device comprises a height-adjustable supporting seat which is fixedly arranged on the base and located under the butt joint portion of the cylinder body, a rigid annular ring supported on the height-adjustable supporting seat, and a diameter segment difference automatic compensation centering device arranged on the rigid annular ring. The diameter segment difference automatic compensation centering device comprises a middle annular groove formed in the outer circle of the middle of the rigid annular ring, a pair of annular segment difference compensation grooves formed in the outer circle of the rigid annular ring and located on the two sides of the middle annular groove, and a pair of annular rubber elastic tires correspondingly arranged in the pair of annular segment difference compensation grooves. According to the invention, the efficiency of assembly butt joint operation and the quality of butt joint welding of the barrel are improved.

Description

technical field [0001] The invention relates to the technical field of low temperature liquid tank container manufacturing, in particular to a butt welding method for a low temperature liquid tank container cylinder body butt joint. Background technique [0002] A cryogenic liquid tank container is a mobile pressure vessel with a supporting frame on the outside for the shipment of cryogenic liquids. The core components of the cryogenic liquid tank container are the inner container and the outer container, and an interlayer space is formed between the inner container and the outer container, and the thermal insulation performance of the container is ensured by vacuuming the interlayer space. Both the inner container and the outer container on the cryogenic liquid tank container are welded structural parts, which are composed of a cylinder body and heads connected to both ends of the cylinder body. Among them, the cylinder body is formed by welding steel plate after rolling o...

AI Technical Summary

Problems solved by technology

[0004] First, due to the steel plate rolling error and welding deformation, the sub-cylinder of the cylinder will inevitably have a certain diameter error and roundness error after it is manufactured. The diameter error and roundness error of the sub-cylinder form a The level difference between the butt joints of the cylinders increases the difficulty of centering the butt joints of the sub-cylinders. It often requires multiple adjustments and repeated measurements to ensure that the sub-cylinders have good coaxiality when they are docked, thereby reducing the production cost. efficiency

[0005] The second is that the welding quality of the sub-cylinder butt joint will be affected by the ambient temperature, especially in the severe cold winter, due to the low ambient temperature of the production site, it is easy to cause the welding quality of the girth weld at the butt joint of the sub-cylinder due to the faster cooling rate defect

[0006] The third is that when the sub-cylinder is butt welded, if the welding operation method is improper, the deformation of the cylinder is easy to occur, including the loss of roundness of the cylinder after welding and the large error of the straight line of the cylinder, which affects the overall quality of the cylinder

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