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Underwater wet welding device and method based on liquid protection

A wet welding and liquid technology, which is applied in the direction of protective supporting devices, welding equipment, welding accessories, etc., can solve the problems of surface slag loss, reduce weld formation, and weld surface unevenness, and achieve welding environment Effects of stabilization, reduction of longitudinal outflow, and output volume reduction

Pending Publication Date: 2021-10-22
HARBIN INST OF TECH AT WEIHAI
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  • Description
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  • Application Information

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Problems solved by technology

It not only increases the welding spatter, but also causes the loss of surface slag, weakens the protective effect of slag, reduces the quality of the weld, and makes the surface of the weld uneven and full of pits, which seriously reduces the weld formation

Method used

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  • Underwater wet welding device and method based on liquid protection
  • Underwater wet welding device and method based on liquid protection

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Embodiment Construction

[0023] Such as figure 1 As shown, a kind of underwater wet welding device based on liquid protection provided by the present invention includes an automatic welding mechanism. The automatic welding mechanism includes an underwater welding torch 11. The underwater welding torch 11 is slidably connected to the welding torch mobile platform 4. The automatic welding mechanism A protective liquid input mechanism is provided in front of the movement of the protective liquid, and the protective liquid input mechanism includes a liquid storage tank 1, an infusion tube 2 and an infusion gun 12 connected in sequence. The liquid storage tank 1 is equipped with a protective liquid, which has higher density and viscosity than water, lower thermal conductivity than water, non-flammable, stable chemical properties, non-toxic to human body, no pollution to the environment, low price and easy to obtain. The protective liquid in the liquid storage tank 1 can be selected from one or more combina...

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Abstract

The invention provides an underwater wet welding device and method based on liquid protection. The device comprises an automatic welding mechanism, the automatic welding mechanism comprises an underwater welding gun, and the underwater welding gun is slidably connected to a welding gun moving platform; and a protection liquid input mechanism is arranged in front of the automatic welding mechanism during the movement, a protection liquid control mechanism is further arranged in the circumferential direction of the automatic welding mechanism and the protection liquid input mechanism, and a to-be-welded area is located in the area range defined by the protection liquid control mechanism. The top end of the protective liquid control mechanism is fixedly connected with the welding gun moving platform through a connecting side plate. According to the method, water near the to-be-welded area is drained and replaced with protection liquid, welding is conducted in the protection liquid environment, the method is economical and practical, the influence of cold cracks of a welding joint and rapid growth and fracture of an electric arc air bag on molten pool disturbance can be effectively reduced, and the stability of the welding process and the welding seam quality are improved. The device and the method can be widely applied to the technical field of underwater wet welding.

Description

technical field [0001] The invention belongs to the technical field of underwater wet welding, and in particular relates to an underwater wet welding device and method based on liquid protection. Background technique [0002] Self-shielding flux-cored wire underwater wet welding technology has many advantages such as convenient operation, high efficiency, low cost and high quality, and is one of the important development directions of underwater automation and intelligent welding. However, during the welding process, due to the fast cooling rate in water, cold cracks are prone to occur at the welded joints. The existence of cold cracks seriously affects the toughness of the welded joints, reduces the safety of the components, and makes the components far below the strength limit. breakage under conditions. In addition, the high temperature of the arc causes a large amount of water around it to vaporize rapidly, resulting in a large number of arc air pockets, which form and ...

Claims

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Application Information

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IPC IPC(8): B23K9/00B23K9/29B23K9/32
CPCB23K9/0061B23K9/29B23K9/32
Inventor 张欣郭宁徐昌盛陈昊付云龙成奇
Owner HARBIN INST OF TECH AT WEIHAI
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