The twin casing structure of large diameter and thick wall inclined nozzle of boiler and pressure vessel. The inclined pipe is a single piece of blank drawing processing, using mechanical machining, flame cutting and even carbon arc gouging to remove the slanted surface of the inclined nozzle, the processing surplus material, material waste, high cost of manufacturing. The utility model consists of a pair of pair material structure. The two ends of the pair are inclined pipe. The length of the pair is the sum of the longest busbar, the shortest busbar of the inclined pipe and the three length of 2 times the blank allowance, and the blank allowance is a single side 1 5mm, and there are two oblique nozzles inside and outside the middle of the pair. The cutting line of the bevel cutting line, the section of the cutting line between the inner and outer bevel of the two inclined nozzles is the diagonal nozzle cutting gap of the pair structure, and the cutting line at the center of the gap junction is between the cutting lines of the inside and outside of the slope at the bottom of the two inclined nozzles, and is consistent with the cutting line shape of the inner and outer bevel of the bottom end of the inclined pipe. The utility model is applied to a pair of sleeve structure of a large diameter thick wall inclined pipe of a boiler and a pressure vessel.
【技术实现步骤摘要】
锅炉和压力容器大口径厚壁斜接管的成对套料结构
:本技术涉及一种锅炉和压力容器大口径厚壁斜接管的成对套料结构。
技术介绍
:在锅炉和压力容器等承压设备中,经常会有大口径厚壁斜接管或切向管、斜切管(简称斜接管)主要受压元件与封头或筒体等壳体相焊;斜接管有安放式、插入式、嵌入式或是带有螺孔的法兰式。由于斜接管中心线与筒体表面不垂直、其中心线在环向或纵向存在一定倾斜角,除了部分插入式斜接管下端面与接管中心线垂直外,通常下端面是与接管中心线不垂直的斜面或斜切面、斜曲面等。长期以来,斜接管都是单件毛坯图或订货图设计、下料或采购和加工制造,尤其对于高压承压设备的高等级锻件或高压无缝钢管制造的大口径厚壁斜接管,采用机械加工、火焰气割甚至碳弧气刨(用于F91、F92、P91、P92无法气割材料)去除斜接管下端斜面余量,加工余料多、材料浪费大、制造费用高、生产效率低、环境污染等。导致锅炉和压力容器等承压设备制造企业大口径厚壁斜接管设计结构和制造技术落后、制造费用高、经济效益差。例如某超超临界锅炉汽水分离器筒体上一对安放式斜接管,如图5-6所示,某超超临界锅炉汽水分离器,斜接管每台2件,相对φ1150筒体对称布置,材料合金钢SA-182F12Ⅳ级锻件,斜接管内外坡口位置线外表面展开图(图略)。按以往惯例,斜接管按单件筒形锻件设计锻件毛坯图并提料外购并厂内加工,见图4。根据斜接管内外坡口位置线外表面展开图,斜接管最大长度为838mm,加上内外表面及长度毛坯余量单边1-5mm,单件斜接管锻件毛坯图长度848mm,外径610mm,内径300mm,单件质量1475千克。斜坡口马鞍形曲面 ...
【技术保护点】
1.一种锅炉和压力容器大口径厚壁斜接管的成对套料结构,其组成包括:成对套料结构本体,其特征是:所述的成对套料结构的两端是斜接管,所述的成对套料结构的长度是斜接管最长母线、斜接管最短母线和2倍毛坯余量三者长度之和,所述的毛坯余量是单边1‑5mm,所述的成对套料结构中间具有两条斜接管底端内外坡口切割线,两条所述的斜接管底端内外坡口切割线所夹的部分是成对套料结构的斜接管切割间隙,斜接管间隙中心切割线在两条所述的斜接管底端内外坡口切割线之间,并且与所述的斜接管底端内外坡口切割线形状一致。
【技术特征摘要】
1.一种锅炉和压力容器大口径厚壁斜接管的成对套料结构,其组成包括:成对套料结构本体,其特征是:所述的成对套料结构的两端是斜接管,所述的成对套料结构的长度是斜接管最长母线、斜接管最短母线和2倍毛坯余量三者长度之和,所述的毛坯余量是单边1-5mm...
【专利技术属性】
技术研发人员:袁承春,
申请(专利权)人:哈尔滨锅炉厂有限责任公司,
类型:新型
国别省市:黑龙江,23
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