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1)  head contour
封头外形
2)  head forming
封头成形
1.
Much success was made after tackling the key technical issues in head forming, transition forging working process, multiplex-plate welding and overall post welding.
在技术改造中对焦炭塔的材质、结构设计做了重大修改 ,同时对封头成形、过渡段锻件加工、复合材料焊接及整体热处理等关键制造技术进行了攻关改进 ,获得了成
3)  spherical head
球形封头
1.
The problem of the stresses in the edge of the hole on the spherical head is discussed by the non-mement theory and the mement theory in this paper.
按无矩理论和有矩理论探讨了球形封头人孔处的应力计算问题,指出了人孔有凸缘按无矩理论求解,无凸缘按无矩理论和有矩理论求解的区别,提出了建立新的设计计算公式和新的设计准则的建议。
2.
Three stresses exist in thick spherical head under inner pressure.
厚壁球形封头在内压力作用下处于三向应力状态 ,可以按类似于拉美公式的分析方法对其三向应力作近似分析。
4)  concave head
凹形封头
5)  Conical Head
锥形封头
1.
Study on feasibility of conical head with half top angle>60°;
半顶角大于60°锥形封头的可行性研究
2.
In this paper, two problems-the design of conical heads subjected to external pressure and stress intensity existing around opening are analyzed and discussed.
本文对外压锥形封头设计以及开孔接管处的应力强度等两个问题进行分析。
3.
In this paper,the authors carried out stress analysis for knuckle (transitional section) of toriconical heads (conical heads with transitional section),proposed another rule design method based on membrane theory,which is contrasted with the rule design method in operation,for the knuckle of toriconical heads.
对折边锥形封头的过渡段部分进行应力分析,提出以无矩理论为基础的常规设计方法,并与现行常规设计方法(国家标准GB150—89《钢制压力容器》所规定的方法)进行比较,同时研究了计算厚度公式。
6)  completed convex head
成形封头
1.
In this article,the regulation of minimum thickness of completed convex head in GB 150 is discussed.
针对GB 150中关于成形封头最小厚度的规定进行了探讨,分析了在设计图样中标注封头名义厚度和最小厚度的必要性。
补充资料:半球形封头
分子式:
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性质:壳体轴向截面为半圆形。直径较小的半球形封头可整体压制成型,但直径较大的由于其深度较大,整体压制有困难,故需采用数块大小相同的梯形球瓣和顶部中心的一块圆形球面板(球冠)组焊而成,其结构见图。半球形封头与其他形式封头相比较,在直径和承压相同的条件下,所需厚度最小,封头容积相同时其表面积最小,用料最省。受力很均匀。但由于制造困难,一般除用于压力较高、直径较大的压力容器外,其他容器较少采用。

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