錐(zhui)形(xing)(xing)封(feng)頭(tou)是殼體(ti)表面為錐(zhui)面的封(feng)頭(tou)。特點是可(ke)使介質通過時(shi)均勻改變速(su)度，便于(yu)卸凈(jing)粘稠液(ye)體(ti)和含固(gu)體(ti)顆粒物料，但力(li)學性能較(jiao)差，在與圓筒或接(jie)管連(lian)接(jie)處(chu)因形(xing)(xing)狀突變產生的不(bu)連(lian)續應(ying)(ying)力(li)較(jiao)大(da)。為了(le)降低(di)不(bu)連(lian)續應(ying)(ying)力(li)，可(ke)在錐(zhui)殼的大(da)端(duan)或小端(duan)采(cai)(cai)(cai)用(yong)(yong)圓弧過渡的有折邊結構或局部增厚(hou)結構。我國壓(ya)力(li)容器(qi)設計規范(fan)要(yao)求(qiu)：半錐(zhui)角(jiao)大(da)于(yu)30°時(shi)，錐(zhui)殼大(da)端(duan)應(ying)(ying)采(cai)(cai)(cai)用(yong)(yong)有折邊結構；半錐(zhui)角(jiao)大(da)于(yu)45°時(shi)，錐(zhui)殼小端(duan)應(ying)(ying)采(cai)(cai)(cai)用(yong)(yong)有折邊結構，由(you)于(yu)錐(zhui)形(xing)(xing)封(feng)頭(tou)壁厚(hou)較(jiao)大(da)，制造不(bu)方便，只有在工藝需(xu)要(yao)時(shi)才被采(cai)(cai)(cai)用(yong)(yong)。

用途

錐(zhui)形封(feng)頭錐(zhui)體(ti)的(de)(de)(de)主(zhu)(zhu)體(ti)部(bu)分(fen)(fen)(fen)在(zai)內壓(ya)作用下，薄(bo)膜應(ying)(ying)力(li)(li)發(fa)生(sheng)(sheng)在(zai)大(da)(da)(da)端。錐(zhui)體(ti)和圓(yuan)筒(tong)部(bu)分(fen)(fen)(fen)連(lian)(lian)接(jie)處，由于(yu)幾何(he)不連(lian)(lian)續性，曲率半徑(jing)突變，因此(ci)該處會產生(sheng)(sheng)較大(da)(da)(da)的(de)(de)(de)橫向(xiang)(xiang)推力(li)(li)，引起較大(da)(da)(da)邊(bian)緣(yuan)應(ying)(ying)力(li)(li)，容易發(fa)生(sheng)(sheng)彎(wan)曲，故需加(jia)(jia)強(qiang)(qiang)(qiang)(qiang)(qiang)。對(dui)大(da)(da)(da)端，軸(zhou)向(xiang)(xiang)彎(wan)曲應(ying)(ying)力(li)(li)為主(zhu)(zhu)要控(kong)制(zhi)(zhi)因素(su)，且屬二(er)次應(ying)(ying)力(li)(li)，所(suo)以應(ying)(ying)力(li)(li)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)控(kong)制(zhi)(zhi)在(zai)內；對(dui)小(xiao)(xiao)端，由于(yu)小(xiao)(xiao)端與圓(yuan)筒(tong)連(lian)(lian)接(jie)處的(de)(de)(de)應(ying)(ying)力(li)(li)狀(zhuang)況主(zhu)(zhu)要為平(ping)均周向(xiang)(xiang)拉應(ying)(ying)力(li)(li)和平(ping)均徑(jing)向(xiang)(xiang)壓(ya)應(ying)(ying)力(li)(li)，屬局部(bu)薄(bo)膜應(ying)(ying)力(li)(li)，所(suo)以應(ying)(ying)力(li)(li)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)可(ke)以控(kong)制(zhi)(zhi)在(zai)內，但由于(yu)此(ci)處局部(bu)薄(bo)膜應(ying)(ying)力(li)(li)有可(ke)能(neng)邊(bian)緣(yuan)效(xiao)應(ying)(ying)的(de)(de)(de)分(fen)(fen)(fen)布范圍，取應(ying)(ying)力(li)(li)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)控(kong)制(zhi)(zhi)在(zai)以內。對(dui)大(da)(da)(da)端，任何(he)情況下加(jia)(jia)強(qiang)(qiang)(qiang)(qiang)(qiang)段(duan)(duan)的(de)(de)(de)厚(hou)度(du)不得(de)小(xiao)(xiao)于(yu)相(xiang)連(lian)(lian)接(jie)的(de)(de)(de)錐(zhui)殼厚(hou)度(du)，加(jia)(jia)強(qiang)(qiang)(qiang)(qiang)(qiang)段(duan)(duan)長度(du)應(ying)(ying)不小(xiao)(xiao)于(yu)，圓(yuan)筒(tong)加(jia)(jia)強(qiang)(qiang)(qiang)(qiang)(qiang)段(duan)(duan)長度(du)應(ying)(ying)不小(xiao)(xiao)于(yu)。對(dui)小(xiao)(xiao)端，任何(he)情況下加(jia)(jia)強(qiang)(qiang)(qiang)(qiang)(qiang)段(duan)(duan)的(de)(de)(de)厚(hou)度(du)不得(de)小(xiao)(xiao)于(yu)相(xiang)連(lian)(lian)接(jie)的(de)(de)(de)錐(zhui)殼厚(hou)度(du)，錐(zhui)殼加(jia)(jia)強(qiang)(qiang)(qiang)(qiang)(qiang)段(duan)(duan)長度(du)應(ying)(ying)不小(xiao)(xiao)于(yu)，圓(yuan)筒(tong)加(jia)(jia)強(qiang)(qiang)(qiang)(qiang)(qiang)段(duan)(duan)長度(du)應(ying)(ying)不小(xiao)(xiao)于(yu)。