Experimental platform and method for researching underwater wet welding bubble evolution
A technology of wet welding and experimental platform, which is applied in processing detection response signals, using sound waves/ultrasonic waves/infrasonic waves to analyze fluids, and using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., and can solve underwater wet welding with poor visibility and arc Stability is difficult to control, cooling speed is fast, etc.
Pending Publication Date: 2020-12-22
EAST CHINA JIAOTONG UNIVERSITY
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Problems solved by technology
[0003] Due to the influence of water in wet welding, the arc is protected by air bubbles generated during the welding process, and the stability of the arc is difficult to control, resulting in low quality welded joints obtained and prone to defects
At the same time, underwater wet welding has poor visibility, fast cooling speed, poor arc stability, and it is difficult to achieve continuous operation
Method used
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Embodiment Construction
[0075] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.
[0076] see Figure 1 to Figure 11 Shown is an experimental platform and method for studying bubble evolution in underwater wet welding in the present invention, including a pressurizing device, a safety protection device, a welding device, and a signal acquisition device.
[0077] The pressurizing device injects compressed air into the experimental cabin, and under the protection of the safety protection device, the experimental cabin is maintained at the required simulated water pressure value, and the welding device can realize the automatic welding movement in the experimental cabin, and the signal acquisition device Collect various signals during the welding process.
[0078] Such as figure 1 As shown, the pressurization device includes a pressurization cabin 1, a filter 2, a refrigerated compressed air dryer 3, an ...
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The invention discloses an experiment platform and method for researching underwater wet welding bubble evolution. An underwater high-pressure wet welding simulation experiment cabin is built throughthe design of a pressurizing device, a safety protection device, a welding device and a signal collection device, and an underwater wet flux-cored wire welding experiment is conducted under the pressure from underwater normal pressure to pressure of 40m water depth; voltage and current signals of an electric arc during welding are collected through a current sensor and a voltage sensor respectively, image collection is conducted on bubbles generated by underwater electric arc combustion through a high-speed camera, and acoustic pulses generated in the dynamic evolution process of the bubbles are detected through a hydrophone; and a modern signal analysis method is used for carrying out noise reduction processing on collected original current signals, voltage signals and bubble sound signals, time domain and frequency domain characteristics of welding current, arc voltage and the bubble sound signals are studied, and correlation analysis is carried out on the bubble sound signals and arc stability through a statistical analysis method.
Description
technical field [0001] The invention relates to the field of underwater wet welding, in particular to an experimental platform and method for studying bubble evolution in underwater wet welding. Background technique [0002] According to different welding environments, underwater welding can be divided into three categories: dry welding, partial dry welding and wet welding. Dry welding uses high-pressure gas to discharge the water environment of the welding part, so that the welding arc burns in a dry environment. This method has good performance in welding joints, but the equipment is complicated and expensive, and is generally only used for important underwater components; the partial drying method seals the arc in a drain cover to form a movable anhydrous area, and its equipment is simple and adaptable Strong, welding quality is also good; the disadvantage is that it is difficult to observe the arc in the drain cover, which increases the difficulty of operation. Underwa...
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IPC IPC(8): G01N29/02G01N29/44G01N29/46G01N29/50G01N27/00G01N21/85
CPCG01N29/02G01N29/4463G01N29/46G01N29/449G01N29/50G01N27/00G01N21/85G01N2291/02433G01N2021/8405G01N2021/8578Y02E30/30
Inventor 李志刚张世帅刘德俊黄卫
Owner EAST CHINA JIAOTONG UNIVERSITY