Inner water circulation copper block forced cooling device for steel structure box-type column electroslag welding

Abstract

The invention provides an inner water circulation copper block forced cooling device for steel structure box-type column electroslag welding. The device comprises two water collection tanks, a water pump, a water valve, a water pressure gauge, a water pipe, a copper block and a U-shaped pipeline. The copper block is tightly attached to the outer surface of an electroslag welding member joint; two drainage channels are formed inside the copper block along the thickness direction; and a water inlet channel is formed close to the electroslag welding member side, and a water outlet channel is formed on the other side. The water inlet channel and the water outlet channel are communicated at one end of the copper block by virtue of the U-shaped pipeline; the water inlet channel at the other end of the copper block is connected with the water collection tank I; the water outlet channel is connected with the water collection tank II; inner water circulation of the copper block is realized under the action of the water pump, and forced cooling in the electroslag welding is realized. According to the device, a too wide heat affected zone, extremely long time Deltat 8 / 5 and high-temperature retention time generated by the electroslag welding joint can be avoided, so that the mechanical property, particularly breaking tenacity, of the electroslag welding joint is improved, the device can be used for improving the microstructure and mechanical property of the building steel structure box-type column electroslag welding joint, and the shock resistance of the structure is improved.

Description

Technical field [0001] The invention belongs to the technical field of welding, and relates to a cooling technology for electroslag welding of a steel structure box column. Background technique [0002] Electroslag welding is a welding method that uses the resistance heat generated by the current passing through the liquid slag to heat and melt the metal to form a weld. With conventional fusion welding (such as CO 2 Compared with gas shielded welding, etc.), electroslag welding has high production efficiency, good economic efficiency, no pollution, no grooves, low consumption of welding materials, and it is not easy to reduce the hardening structure due to the preheating effect of the slag pool. Less cold cracking tendency, electroslag welding is widely used in the welding of thick and large components, such as construction steel structures, ships, pressure vessels and bridges. [0003] In the flexural steel frame of high-rise buildings, the box-shaped column has very good working...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a forced cooling device for internal water-flowing copper blocks for electroslag welding of box-shaped columns of steel structures, which mainly solves the problem of excessive residence time of weld seams and heat-affected zones at high temperatures. Problems with a large tendency to produce coarse grains and overheated structures

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