supermarket refrigerated showcase » article > display freezer > How to use display cooler gas welding equipment (2)
How to use display cooler gas welding equipment (2)
How to use display cooler gas welding equipment
Through observation, we can find that the flame has a bright flame core, the inner flame is bright blue, and the outer flame is sky blue. This kind of flame is called a neutral flame. The neutral flame is suitable for welding various pipelines in the display cooler. When using a neutral flame to weld the pipeline of the display cooler, the length of the flame (overall) is generally 20-30cm . When using gas welding equipment to weld the capillary, it is generally required to reduce the flame, and its length is generally 10-15cm. The length of the flame represents the heating capacity of the flame. If the length of the flame is too long (that is, strong gunpowder), when the length of the flame is too long (that is, strong fire welding), it will generally cause the oxidation of the copper pipe and affect the strength of the welding. When the flame length is short (ie, low-fire welding), the welding time will be too long, which will also cause the oxidation of the copper pipe, which is also not conducive to the welding of the pipeline. When the flame is a neutral flame, if you continue to open the large oxygen control knob, that is, increase the output of oxygen, you will find that the flame gradually turns blue. This kind of flame is called a peroxygen flame. Over-oxygen flame is extremely high temperature due to more oxygen than fuel gas, and is suitable for welding thick materials. If an over-oxygen flame is used to weld thin materials, the welded materials will produce pores or oxides. When the flame is an over-oxygen flame, turn down the oxygen control knob to reduce the oxygen output. When the oxygen output of the display cooler is reduced to a certain level, the flame will become a carbonized flame.
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