中文字幕在线亚洲精品,国产精品www夜色视频,国产精品av在线,久久久久夜夜夜精品国产,国产做爰又粗又大又爽动漫,欧美人妻aⅴ中文字幕,亚洲av无码国产综合专区,国产又色又爽又黄的,亚洲熟妇自偷自拍另欧美,狠狠精品久久久无码中文字幕

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

www国产无套内射com| 免费av片在线观看网站| 国产精品美女久久久久久| 国语自产偷拍在线观看 | 一区二区三区在线观看视频精品| 日本成人在线不卡一区二区三区| 女同另类激情在线三区| 国产亚洲婷婷香蕉久久精品 | 一区二区中文字幕在线观看污污 | 人妻免费黄色片手机版| 一区二区在线亚洲av蜜桃| 四虎影视永久在线精品| 人妻少妇av无码一区二区| 亚洲av电影天堂男人的天堂| 55夜色66夜色国产精品视频| 亚洲国产成人片在线观看无码| 国产一区内射最近更新| 午夜裸体性播放| 欧美又粗又长又爽做受| 公与淑婷厨房猛烈进出| 亚洲国产精品久久精品| 青青草狠吊色在线视频| 一区二区三区国产高清视频| 人妻久久一区二区三区| 中文字幕一二三四五六七区| 成人免费av高清在线| 日本岛国一区二区三区四区| 午夜视频一区二区三区在线观看 | 高清少妇一区二区三区| 男女午夜视频一区二区三区| 国产成人综合亚洲国产| 一区二区三区在线观看视频免费 | 亚洲一区二区av天堂| 亚洲av网一区二区三区成人| 国产视频一区二区三区久久亚洲| 最好的99精品色视频大全在线| 国产偷拍自拍在线观看| 免费黄网站永久地址进入| 在线观看视频国产一区二区三区| 青青草成人原视频在线播放视频 | 国产成版人性视频免费版|