密(mi)封式油(you)(you)(you)箱(xiang)(xiang)。密(mi)封式油(you)(you)(you)箱(xiang)(xiang)是(shi)(shi)在器身總裝(zhuang)全部完成(cheng)裝(zhuang)入油(you)(you)(you)箱(xiang)(xiang)后，它的上下箱(xiang)(xiang)沿(yan)之間不(bu)是(shi)(shi)靠螺(luo)栓連接(jie)，而是(shi)(shi)直(zhi)接(jie)焊(han)(han)接(jie)在～起的，形(xing)成(cheng)一(yi)個整體(ti)。變(bian)(bian)(bian)壓器油(you)(you)(you)箱(xiang)(xiang)外殼接(jie)地(di)對接(jie)地(di)裝(zhuang)置的要求：①接(jie)地(di)體(ti)與(yu)接(jie)地(di)線應(ying)焊(han)(han)接(jie)牢(lao)固(gu)。②接(jie)地(di)電(dian)阻應(ying)不(bu)大(da)(da)于0.5Ω，地(di)線與(yu)設備應(ying)可靠連接(jie)。③圓鋼接(jie)地(di)體(ti)直(zhi)徑應(ying)符(fu)合有關規定。當(dang)變(bian)(bian)(bian)壓器負荷增大(da)(da)，油(you)(you)(you)溫，變(bian)(bian)(bian)壓器油(you)(you)(you)膨(peng)脹，油(you)(you)(you)箱(xiang)(xiang)中盛不(bu)下時，也會順(shun)管(guan)道，回流到油(you)(you)(you)枕中。油(you)(you)(you)枕中已不(bu)能(neng)容納時，油(you)(you)(you)流就會擠碎玻(bo)璃(li)，從防(fang)爆(bao)管(guan)沖(chong)出(chu)，保護變(bian)(bian)(bian)壓器不(bu)受(shou)大(da)(da)的損壞。

變(bian)壓(ya)(ya)器(qi)油(you)箱(xiang)(xiang)外殼(ke)接(jie)地(di)對接(jie)地(di)裝置的要(yao)求：①接(jie)地(di)體與接(jie)地(di)線(xian)應(ying)(ying)焊接(jie)牢固。②接(jie)地(di)電阻應(ying)(ying)不大于0.5Ω，地(di)線(xian)與設備應(ying)(ying)可靠連(lian)接(jie)。③圓(yuan)鋼接(jie)地(di)體直徑(jing)應(ying)(ying)符合有(you)關規定。當變(bian)壓(ya)(ya)器(qi)的器(qi)身需要(yao)進行(xing)檢修時，可以將整個變(bian)壓(ya)(ya)器(qi)帶油(you)搬運(yun)至有(you)起重(zhong)設備的場所，將箱(xiang)(xiang)蓋打開，吊出器(qi)身，進行(xing)檢修。如何對變(bian)壓(ya)(ya)器(qi)油(you)箱(xiang)(xiang)檢漏方法：油(you)箱(xiang)(xiang)檢漏也稱試漏，常用的有(you)水試和氣試兩(liang)種；是(shi)變(bian)壓(ya)(ya)器(qi)油(you)箱(xiang)(xiang)生(sheng)產廠家試驗油(you)箱(xiang)(xiang)是(shi)否合格的方法。

密封(feng)式(shi)(shi)(shi)油(you)(you)(you)箱(xiang)(xiang)(xiang)。密封(feng)式(shi)(shi)(shi)油(you)(you)(you)箱(xiang)(xiang)(xiang)是在器(qi)身(shen)總裝(zhuang)(zhuang)(zhuang)全部完成(cheng)裝(zhuang)(zhuang)(zhuang)入油(you)(you)(you)箱(xiang)(xiang)(xiang)后(hou)，油(you)(you)(you)式(shi)(shi)(shi)變(bian)(bian)(bian)壓(ya)(ya)器(qi)生產廠(chang)家，它的(de)(de)上(shang)下箱(xiang)(xiang)(xiang)沿之間(jian)不是靠螺栓(shuan)(shuan)連接(jie)，而(er)是直接(jie)焊(han)接(jie)在～起(qi)的(de)(de)，形成(cheng)一(yi)個整體。上(shang)節(jie)(jie)油(you)(you)(you)箱(xiang)(xiang)(xiang)做成(cheng)鐘罩形，下節(jie)(jie)油(you)(you)(you)箱(xiang)(xiang)(xiang)一(yi)般(ban)為槽形箱(xiang)(xiang)(xiang)底或(huo)平板式(shi)(shi)(shi)箱(xiang)(xiang)(xiang)底，上(shang)、下節(jie)(jie)油(you)(you)(you)箱(xiang)(xiang)(xiang)用螺栓(shuan)(shuan)連接(jie)在一(yi)起(qi)，中間(jian)力口放密封(feng)膠墊(dian)。下節(jie)(jie)油(you)(you)(you)箱(xiang)(xiang)(xiang)還裝(zhuang)(zhuang)(zhuang)設(she)放油(you)(you)(you)閥門和油(you)(you)(you)樣閥門。變(bian)(bian)(bian)壓(ya)(ya)器(qi)運抵現場(chang)和運行期間(jian)一(yi)般(ban)不進行吊芯檢修(xiu)，這就要求變(bian)(bian)(bian)壓(ya)(ya)器(qi)的(de)(de)質(zhi)量應有可靠的(de)(de)保證。隨著變(bian)(bian)(bian)壓(ya)(ya)器(qi)制(zhi)造水(shui)平的(de)(de)提高，密封(feng)式(shi)(shi)(shi)結構也逐漸被采(cai)用，目前(qian)國內外的(de)(de)一(yi)些(xie)大型(xing)變(bian)(bian)(bian)壓(ya)(ya)器(qi)也已開始(shi)采(cai)用這種結構。