机械5

YSZ944H2.5C DN1100煤气水封铸钢闸阀设计 摘要 本课题是设计闸阀的结构与工艺。闸阀主要由阀体、阀盖、闸板、阀杆等装置组成，其结构在阀体内类似闸阀一样的板状物与无相配的两阀座(或单阀座)之间垂直于流体移动，从而打开或切断流道。用它做启闭使用，并在全开时有整个流道直通的作用。闸阀适用范围广泛，主要应用于石油、化工、电力、医药、火力等行业。 本文是针对DN1100煤气水封闸阀的设计展开阐述。该闸阀设计为法兰连接形式的软密封结构，阀体与阀座采用螺纹阀座，阀盖与支架采用分体结构。闸阀结构设计的基;本内容为对闸阀标准的了解、阀体壁厚计算与校核、阀体尺寸的确定、密封比压计算、总转矩计算、阀杆强度校核等;闸阀工艺设计主要着重对闸板、阀体、阀座、阀盖、阀杆等主要零件的制造加工工艺规程编制。 关键词:闸阀；结构与工艺；密封；密封比压 YSZ944H-2.5CD N1100gas water seal cast steel gate valve desig
n. Abstract The subject of this paper is to desig
n the structure a
nd tech
nology of gatevalve.Gate valve is mai
nly composed of valve body,valve cover,gate plate, stem a
nd other devices.Its structure moves perpe
ndicular to the fluid betwee
n aplate-like object similar to gate valve a
nd two valve seats(or si
ngle valve seat)with out matchi
ng,thus ope
ni
ng or cutti
ng off the flow passage.It is used for ope
ni
ng a
nd closi
ng,a
nd has the fu
nctio
n of straight-through of the whole flow passage whe
n fully ope
ned.Gate valves are widely use di
npetroleum,chemical i
n dustry,electric power,medici
ne,fire a
nd other i
n dustries.This article focuses o
n the desig
n of DN1000 gas water seal gate valve.The gate valve is desig
ned as a soft seali
ng structure i
n the form off la
ngeco
n
nectio
n.The valve body a
nd valve seat a dopt threaded valve seat,a
nd the valve cover a
nd bracket a dopt split structure.Fou
ndatio
n of gate valve structural desig
n;This co
nte
ntis the u
nder sta
ndi
ng of gate valve sta
ndard,calculatio
n a
nd check of valve body wall thick
ness,determi
natio
n of valve body size,calculatio
n of seali
ng specific pressure,calculatio
n of to taltorque,check of valve stem stre
ngth,etc.The gate valve process desig
n mai
nly focuses o
n the preparatio
n of ma
nufacturi
ng processs pecificatio
ns for the mai
n partssuchas gate plate,valvebody,valveseat,valvecover,valvestem,etc.Keywords:gate valve;Structure a
nd tech
nology;Seali
ng;Seali
ng pressureratio. 目录 摘要i Abstract ii 1引言1 2概述2 2.1阀门的分类2 2.2闸阀的定义4 2.3闸阀的种类4 2.4闸阀的密封原理和特点5 3闸阀的结构8 3.1阀体与阀盖多采用法兰连接8 3.2闸板与阀座密封圈8 4设计需达到技术要求10 4.1阀体10 4.2阀盖10 4.3闸板10 4.4上密封座10 4.5填料垫片10 4.6阀门技术要求10 4.7闸阀的工艺11 4.8阀门参数及标准12 4.9闸阀的检验与试压13 5产品设计初定及阀门技术参数17 5.1阀门技术参数17 5.2设备结构及功能17 5.3作用原理18 5.4阀门壳体壁厚的确定18 6阀杆扭矩计算25 6.1初算阀杆扭矩25 6.2阀杆稳定性校核30 6.3中口螺栓设计与校核33 6.4立柱设计与校核35 6.5立柱连接螺栓设计与校核36 参考文献40 附录:文中引用相关资料42 致谢54