壓(ya)(ya)(ya)力(li)(li)(li)容器(qi)的結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)區(qu)(qu)(qu)(qu)(qu)往往是壓(ya)(ya)(ya)力(li)(li)(li)容器(qi)的高應(ying)力(li)(li)(li)區(qu)(qu)(qu)(qu)(qu)，一般(ban)說來，壓(ya)(ya)(ya)力(li)(li)(li)容器(qi)的結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)區(qu)(qu)(qu)(qu)(qu)可(ke)分為(wei)總體(ti)結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)區(qu)(qu)(qu)(qu)(qu)和局部(bu)結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)區(qu)(qu)(qu)(qu)(qu)兩種。總體(ti)結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)是指對結(jie)構(gou)(gou)相(xiang)當大的部(bu)分產(chan)生(sheng)影(ying)響的應(ying)力(li)(li)(li)或(huo)應(ying)變源，例如封頭與(yu)殼體(ti)連(lian)(lian)(lian)(lian)(lian)接(jie)區(qu)(qu)(qu)(qu)(qu)、設備法(fa)蘭與(yu)殼體(ti)連(lian)(lian)(lian)(lian)(lian)接(jie)區(qu)(qu)(qu)(qu)(qu)、接(jie)管(guan)(guan)區(qu)(qu)(qu)(qu)(qu)、不(bu)(bu)同直(zhi)徑或(huo)厚度(du)或(huo)材(cai)料的連(lian)(lian)(lian)(lian)(lian)接(jie)區(qu)(qu)(qu)(qu)(qu)等(deng)(deng)；局部(bu)結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)是指對結(jie)構(gou)(gou)相(xiang)對較(jiao)小(xiao)(xiao)的范圍內產(chan)生(sheng)影(ying)響的應(ying)力(li)(li)(li)或(huo)應(ying)變源，例如小(xiao)(xiao)的圓角半徑、小(xiao)(xiao)的連(lian)(lian)(lian)(lian)(lian)接(jie)件、部(bu)分焊透的焊縫或(huo)小(xiao)(xiao)孔等(deng)(deng)。很多結(jie)構(gou)(gou)，北京球形封頭，如壓(ya)(ya)(ya)力(li)(li)(li)容器(qi)開孔接(jie)管(guan)(guan)區(qu)(qu)(qu)(qu)(qu)等(deng)(deng)既存(cun)在總體(ti)結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)因(yin)素(su)，又存(cun)在局部(bu)結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)因(yin)素(su)。由于(yu)結(jie)構(gou)(gou)不(bu)(bu)連(lian)(lian)(lian)(lian)(lian)續(xu)區(qu)(qu)(qu)(qu)(qu)的幾何結(jie)構(gou)(gou)一般(ban)較(jiao)為(wei)復雜，很難(nan)用解析法(fa)進行求解，通常采用有(you)限(xian)元(yuan)方法(fa)進行計算。

      這種封(feng)(feng)(feng)(feng)頭無論是從受(shou)(shou)力情況(kuang)，材料(liao)來源，結構(gou)，制造以(yi)及經濟方面(mian)(mian)進行分析比(bi)較，均比(bi)其(qi)它封(feng)(feng)(feng)(feng)頭更適(shi)合用(yong)在容器上(shang)面(mian)(mian)，只是這種封(feng)(feng)(feng)(feng)頭，球形(xing)(xing)封(feng)(feng)(feng)(feng)頭廠家報價，沒有直邊(bian)部分，所以(yi)焊接以(yi)及外觀(guan)(guan)跟別的封(feng)(feng)(feng)(feng)頭相比(bi)，球形(xing)(xing)封(feng)(feng)(feng)(feng)頭定制，沒有那么(me)美觀(guan)(guan)。但是球冠形(xing)(xing)封(feng)(feng)(feng)(feng)頭依然受(shou)(shou)到很 多客戶的青睞(lai)，那么(me)采用(yong)這樣的封(feng)(feng)(feng)(feng)頭應注意哪些問題呢？

在壓力較高，結構(gou)(gou)尺(chi)寸較大(da)時(shi)，球(qiu)形(xing)封頭(tou)(tou)出售，采(cai)用(yong)球(qiu)冠(guan)(guan)形(xing)封頭(tou)(tou)比采(cai)用(yong)平底封頭(tou)(tou)好；采(cai)用(yong)球(qiu)冠(guan)(guan)形(xing)封頭(tou)(tou)時(shi)，應使圓筒(tong)厚度(du)大(da)于等于封頭(tou)(tou)厚度(du)，為了(le)方便(bian)制造(zao)，并節省(sheng)了(le)材料；采(cai)用(yong)球(qiu)冠(guan)(guan)形(xing)封頭(tou)(tou)，對連接的焊(han)接接頭(tou)(tou)型式(shi)須(xu)采(cai)用(yong)全焊(han)透結構(gou)(gou)，并提出保證(zheng)該焊(han)接接頭(tou)(tou)的措施。

      半(ban)球(qiu)形(xing)封頭和(he)球(qiu)冠形(xing)封頭：受內壓(ya)(ya)的半(ban)球(qiu)形(xing)封頭在均勻內壓(ya)(ya)作(zuo)用下，薄(bo)(bo)壁(bi)球(qiu)形(xing)容器的薄(bo)(bo)膜應(ying)力為相同直(zhi)(zhi)徑(jing)(jing)圓筒的一半(ban)，故從應(ying)力分(fen)析來看(kan)，球(qiu)形(xing)封頭是的結構形(xing)式。但缺點(dian)是深度(du)大，直(zhi)(zhi)徑(jing)(jing)小時整體沖壓(ya)(ya)困難，大直(zhi)(zhi)徑(jing)(jing)采用分(fen)瓣(ban)沖壓(ya)(ya)其(qi)拼(pin)焊(han)工作(zuo)量也較大。半(ban)球(qiu)形(xing)封頭常用在高壓(ya)(ya)容器上.

球(qiu)冠形封頭是部(bu)分球(qiu)面與圓筒直接(jie)連(lian)接(jie)，因結構簡單，制造方便，常用(yong)作容器(qi)中(zhong)兩獨立受壓室的(de)中(zhong)間封頭，也(ye)可(ke)用(yong)作端蓋。由于(yu)球(qiu)面與圓筒連(lian)接(jie)處(chu)沒(mei)有轉角過(guo)渡，所以在連(lian)接(jie)處(chu)附近的(de)封頭和圓筒上(shang)都存在相當大的(de)不連(lian)續(xu)應(ying)力，其應(ying)力分布(bu)不甚(shen)合理(li).

所以一(yi)般(ban)在低(di)壓容器設備，可(ke)以采用球(qiu)冠形封頭(tou)，而且球(qiu)冠形封頭(tou)優點(dian)是，任何直徑都可(ke)定做(zuo)。