Service Hotline
086-577-86923687
Current Location:Home - News - Industry News
Withstand pressure within several common structural features of the head
Release Time:2011-10-17  Views :
Within several common withstand the pressure head oval, conical, spherical cap, conical head, do the following description for the following four head shape and structure of the relevant circumstances:
 
1. Elliptical Head circumferential (hoop) stress and meridional (axial) stress points are changes in the housing, the hoop stress and axial stress vertices are equal, while at the equator stress. Elliptical head to withstand the internal pressure even when the axial stress constant tensile stress (positive), and the maximum to the equator decreases gradually to a minimum at the vertex; the ring to stress, head pressure transition zone will begin to appear stress, if the minor axis ratio continues to increase, compressive stress head edge transition zone will rapidly increase, the more light that is head, the higher the compressive stress head edge, so that the head and minor axes ratio is limited to 2.6 less is more reasonable. In addition to head thickness should meet the strength requirements of large-diameter thin-walled oval head, but also put up due to the compressive stress head the transition zone, resulting in the reduction of elastic instability, therefore should head thickness meet the stiffness requirements.
 
2. dished head by a spherical section, straight section and a transition zone of three parts. Transition zone connecting the spherical portion and the straight section, the radius of curvature of the warp at both ends of the transition zone has a mutation will produce edge stress. The ratio of the radius of the spherical radius of the size of the transition zone and dished head edge stress related, the smaller the ratio, the more severe curvature of the border mutations, the greater edge stress, when the ratio of the radius of the transition zone limit ie 0:00, dished head turned into a spherical cap head and body straight, this time to the maximum edge stress. So dished head of the transition zone is to reduce the edge stress, and straight side edge portion in order to avoid stress in the weld head and the cylinder connection.
 
3. The spherical cap shaped head occur in the spherical radius of curvature of the cylindrical junction mutation, but because of two housing exists no common tangent lateral thrust, so considerable discontinuity stress, so this is generally only head pressure is not high for the occasion, and the fillet weld head and cylinder connection must be full penetration structure. When the ball crown-shaped head design, should pay attention to the thickness of the cylinder head and the connection should not be less than the thickness of the head, or should be set up to strengthen the connection between the transition section and the cylinder head. The thickness of the cylindrical segment should strengthen and seal top thick, the length should not be less than the purpose of edge stress reduction.
 
4. The conical head what time zone folding angle restrictions refer GB150 relevant chapters argument. Here to talk about the internal pressure that is no hemming conical head.
The main body portion cone under the action of the internal pressure, the maximum stress occurs at the big end of the film. Cone and cylindrical portion junction, due to the geometric discontinuity, the radius of curvature mutation, so there will have a greater lateral thrust, causing the larger edge stress, prone to bending, so be strengthened.
Key Words : 不銹鋼封頭
Products
Elliptical head
Elliptical head
Butterfly head
Butterfly head
Spherical head spin edge
Spherical head spin edge
Flat Head
Flat Head
Spherical head
Spherical head
Bow bottom head
Bow bottom head
Conical head
Conical head
Spherical cap shaped head
Spherical cap shaped head
Insulation panel
Insulation panel
Expansion Joints
Expansion Joints
Jacket (cylinder) rotation side
Jacket (cylinder) rotation side
Manhole flange
Manhole flange
NAVIGATION
Wenzhou Shangshang Metal Products Co., Ltd.
Add : 208,Zhanhong Road,Dushan,Longwan CentralIndustry,Wenzhou
Tel : 086-577-86923687 85981288  Fax : 086-577-86913687
All Rights Reserved © 2016 Wenzhou Shangshang Metal Products Co., Ltd    Zhejiang ICP No. 08,005,782
  • Follow Us

    Follow Us

无码午夜福利免费区久久_亚洲av片劲爆在线观看_日本有码中文字幕第一页在线播放_亚洲日韩精品在线