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锅炉膨胀节

点击次数:   更新时间:17/03/14 13:34:03     来源:nunsnun.com关闭分    享(xiang):

  膨(peng)胀节习惯上(shang)也(ye)叫补偿(chang)(chang)器,或(huo)伸(shen)(shen)缩(suo)节。由(you)(you)构(gou)成其(qi)工作主体(ti)的(de)波纹管(guan)(guan)(guan)(guan)(一种(zhong)弹(dan)性(xing)元件)和端管(guan)(guan)(guan)(guan)、支(zhi)架、法兰(lan)、导(dao)管(guan)(guan)(guan)(guan)等附件组成。 膨(peng)胀节是为了补偿(chang)(chang)因(yin)温(wen)度(du)差与机械振动引起的(de)附加(jia)应(ying)力,而(er)设(she)置在容器壳体(ti)或(huo)管(guan)(guan)(guan)(guan)道上(shang)的(de)一种(zhong)挠性(xing)结构(gou)。利用(yong)其(qi)工作主体(ti)波纹管(guan)(guan)(guan)(guan)的(de)有效伸(shen)(shen)缩(suo)变(bian)(bian)形,以吸收管(guan)(guan)(guan)(guan)线、导(dao)管(guan)(guan)(guan)(guan)、容器等由(you)(you)热(re)(re)胀冷缩(suo)等原(yuan)因(yin)而(er)产生的(de)尺寸变(bian)(bian)化,或(huo)补偿(chang)(chang)管(guan)(guan)(guan)(guan)线、导(dao)管(guan)(guan)(guan)(guan)、容器等的(de)轴向(xiang)、横向(xiang)和角(jiao)向(xiang)位(wei)移。也(ye)可(ke)用(yong)于降噪(zao)减(jian)振、供热(re)(re)上(shang),为了防止供热(re)(re)管(guan)(guan)(guan)(guan)道升温(wen)时,由(you)(you)于热(re)(re)伸(shen)(shen)长或(huo)温(wen)度(du)应(ying)力而(er)引起管(guan)(guan)(guan)(guan)道变(bian)(bian)形或(huo)破坏,需要在管(guan)(guan)(guan)(guan)道上(shang)设(she)置补偿(chang)(chang)器,以补偿(chang)(chang)管(guan)(guan)(guan)(guan)道的(de)热(re)(re)伸(shen)(shen)长,从而(er)减(jian)小管(guan)(guan)(guan)(guan)壁的(de)应(ying)力和作用(yong)在阀件或(huo)支(zhi)架结构(gou)上(shang)的(de)作用(yong)力。
  由(you)于膨胀(zhang)(zhang)(zhang)节(jie)作为(wei)一(yi)种(zhong)能(neng)(neng)自由(you)伸缩的(de)弹性补(bu)偿(chang)元件,具有(you)工作可靠、性能(neng)(neng)良好、结构紧凑等优点,已广泛应用(yong)(yong)在(zai)(zai)(zai)化(hua)工、冶(ye)金、核能(neng)(neng)等部门。在(zai)(zai)(zai)容器上采用(yong)(yong)的(de)膨胀(zhang)(zhang)(zhang)节(jie),有(you)多(duo)种(zhong)形式(shi),就波纹的(de)形状而(er)言,以U形膨胀(zhang)(zhang)(zhang)节(jie)应用(yong)(yong)得(de)最为(wei)广泛,其次还有(you)Ω形和C形等。而(er)在(zai)(zai)(zai)管道(dao)上采用(yong)(yong)的(de)膨胀(zhang)(zhang)(zhang)节(jie)就结构补(bu)偿(chang)而(er)言,又分为(wei)万能(neng)(neng)式(shi)、压力平衡(heng)式(shi)、铰(jiao)链式(shi)以及万向接头式(shi)等。