A kind of heat insulation protection device for vacuum preheating electron beam welding of pressure-resistant shell

Abstract

The invention relates to a heat-insulation protection device for vacuum preheating electron beam welding of a pressure-resistant shell. The heat-insulation protection device is arranged outside the pressure-resistant shell, and a skeleton is formed by detachable stainless steel plates connected by bolts, and includes an upper hemisphere spacer. A thermal protection device and a lower hemisphere thermal insulation device, wherein the upper hemisphere thermal insulation device is directly and fixedly connected with the upper surface of the outer heater to form a cap-like structure, the lower hemisphere thermal insulation device is located below the outer heater, and the lower hemisphere thermal insulation device The device is fixed with the turntable to form a bowl-shaped structure. The outside of the skeleton is covered with multiple layers of highly reflective metal foils for thermal insulation protection. The center of the upper hemisphere thermal insulation protection device is set as a smooth cylindrical structure. With the cylindrical mechanism, the present invention can play a good heat-insulating protection effect during the vacuum preheating welding of the pressure-resistant shell, improve the heating efficiency, and simultaneously solve the problem of winding during the movement of the line.

Description

technical field [0001] The invention relates to the field of metal material welding, in particular to a heat insulation protection device for vacuum preheating electron beam welding of a pressure-resistant shell. Background technique [0002] In traditional electron beam welding technology, electron beam defocus scanning is usually used for preheating, and only the surface of thin or thick plates is preheated before welding, and the preheating capacity is limited; vacuum preheating electron beam welding is a new welding method, which uses vacuum The combination of preheating and electron beam welding technology can effectively improve the weldability of special materials and improve the weld performance at the same time. [0003] Based on this vacuum preheating electron beam welding method, vacuum preheating electron beam welding is required for the annular weld in the existing pressure shell components, and the required preheating temperature will reach above 600°C. The we...

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Problems solved by technology

[0003] Based on this vacuum preheating electron beam welding method, vacuum preheating electron beam welding is required for the annular weld in the existing pressure shell components, and the required preheating temperature will reach above 600°C. The welding machine is damaged, and it is urgent to solve the problem of heat radiation to the inside of the electron beam welder under the high temperature of the pressure shell; at the same time, the pressure shell needs to be rotated during the welding process, and the connection line of the heater inside the shell will be rotated The occurrence of winding causes damage, and short circuit phenomenon is prone to occur. There is no solution for the above problems in the prior art

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