Water wall abrasionproof scale type welding method

Abstract

The invention relates to a water wall abrasionproof scale type welding method. Abrasionproof plates are adopted to carry out abrasion prevention on water cooled pipes in a sequential scale type overlapped manner. One side of each abrasionproof plate is provided with circular arc matched with the outer wall of the corresponding water cooled pipe, wherein the two sides of the circular arc are provided with an X welding point and a Y welding point, and the two welding points are arranged on the two sides of the abrasionproof plate. A horizontal line is drawn for the water cooled pipes which are arranged side by side, and the abrasionproof plates intersect with the horizontal line. Frstly, the X welding points of the first abrasionproof plates are subjected to spot welding, then, the X welding points of the second abrasionproof plates are subjected to spot welding sequentially, the multiple abrasionproof plates are sequentially subjected to spot welding, the abrasionproof plates intersect with the horizontal lines and are mutually and partially overlapped, the X welding points of each abrasionproof plate are welded, and then the Y welding points of each abrasionproof plate are welded; or the X welding points and the Y welding points of each abrasionproof plate are sequentially welded. The method using the scheme has the beneficial effects that overlapping gaps of the abrasionproof plates are tight, the welding quality is high, the abrasionproof plates are not prone to disengaging, and the abrasionproof effect is good.

Description

technical field [0001] The invention relates to the technical field of boiler anti-wear, in particular to a water-cooled wall anti-wear fish scale welding method. Background technique [0002] Circulating fluidized bed combustion technology is a clean coal combustion technology highly recognized by the market. It has been widely used and developed at home and abroad for its advantages of high efficiency, low pollution, strong adaptability to coal types, and good load controllability. In the circulating fluidized bed boiler, there will be a large number of high-temperature and high-speed moving material particles that are close to the pipeline. Such particles have strong erosion and wear force. Therefore, how to prevent the water wall of the circulating fluidized bed boiler from wearing out and bursting is the long-term safety. The key to stable operation. [0003] At present, the anti-wear technology of the water wall of circulating fluidized bed boiler mainly adopts the po...

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Problems solved by technology

[0003] At present, the anti-wear technology of the water wall of circulating fluidized bed boiler mainly adopts the popular high-chromium and high-nickel alloy plate anti-wear technology, which also plays a vital role. However, due to the relatively primitive construction and welding methods, The welding of one piece is completed after one piece is completely welded, resulting in uneven construction quality, excessive lap gap, poor anti-wear effect, and unqualified welding quality. Stable and guaranteed anti-wear effect

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