鎢(wu)極(ji)氬弧焊接不銹鋼管(guan)設備主要有以下幾種

①. 鎢極氬弧焊機

   鎢極(ji)(ji)氬(ya)弧焊(han)的電(dian)(dian)源必(bi)須具有陡降或垂直陡降外特性，國內幾(ji)種專(zhuan)用(yong)的鎢極(ji)(ji)氬(ya)弧焊(han)機(ji)的型號見表4-25。此外，焊(han)接非重要件，可用(yong)焊(han)條電(dian)(dian)弧焊(han)的弧焊(han)發(fa)電(dian)(dian)機(ji)或弧焊(han)整流(liu)器作弧焊(han)電(dian)(dian)源，配以(yi)專(zhuan)用(yong)焊(han)槍，也可實現手工鎢極(ji)(ji)氬(ya)弧焊(han)。

   專用焊(han)機應具有下(xia)列功能(neng)：焊(han)前提前1.5～4.0s輸送(song)保(bao)護(hu)(hu)氣(qi)(qi)體(ti)，以(yi)驅趕輸氣(qi)(qi)管內和焊(han)接(jie)區間(jian)的空氣(qi)(qi)，防(fang)止產生(sheng)氣(qi)(qi)孔；焊(han)后延(yan)遲5～15s停(ting)止輸送(song)保(bao)護(hu)(hu)氣(qi)(qi)體(ti)，以(yi)保(bao)證尚(shang)未冷卻的鎢(wu)極和熔池能(neng)在保(bao)護(hu)(hu)氣(qi)(qi)氛(fen)下(xia)冷卻，防(fang)止氧化和產生(sheng)氣(qi)(qi)孔；自動(dong)接(jie)通和切斷保(bao)護(hu)(hu)氣(qi)(qi)源及(ji)引弧、穩(wen)弧的電路，防(fang)止接(jie)觸引弧燒損鎢(wu)極和接(jie)頭產生(sheng)夾(jia)鎢(wu)缺陷；控制電源的通斷；焊(han)接(jie)結束前電流能(neng)自動(dong)衰(shuai)減，以(yi)消除弧坑和防(fang)止弧坑開裂。

②. 鎢(wu)極氬弧焊焊槍（arc welding gun）

   鎢(wu)極氬(ya)弧焊(han)焊(han)槍由噴嘴、鎢(wu)極夾持裝置、導線(xian)、氣水輸送膠管、啟動開(kai)關等(deng)零部件組成（結(jie)構詳見圖(tu)4-31）。根據適(shi)用的(de)焊(han)接電流大(da)小(xiao)(xiao)，焊(han)槍分水冷(leng)式(shi)和(he)氣冷(leng)式(shi)兩類(lei)。常用水冷(leng)卻式(shi)焊(han)槍型號(hao)有(you)QS-75°／400A、QS-75／500A等(deng)，可匹(pi)配在大(da)功率氬(ya)弧焊(han)機(ji)上(shang)；氣冷(leng)卻式(shi)的(de)焊(han)槍型號(hao)有(you)QQ-85／100A、QQ-85／200A等(deng)·可匹(pi)配在小(xiao)(xiao)功率氬(ya)弧焊(han)機(ji)上(shang)。

③. 氣體保護(hu)裝置

   氣(qi)(qi)(qi)(qi)體(ti)(ti)保護裝置有(you)氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)瓶(ping)(ping)、減(jian)(jian)壓(ya)器(qi)(qi)和(he)流(liu)(liu)(liu)量(liang)(liang)計(ji)(ji)(ji)。氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)瓶(ping)(ping)是儲存(cun)氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)的(de)(de)壓(ya)力容器(qi)(qi)，使用(yong)(yong)(yong)(yong)(yong)(yong)時應(ying)注(zhu)(zhu)意(yi)(yi)安全規則。按 GB 7144-1999《氣(qi)(qi)(qi)(qi)瓶(ping)(ping)顏色(se)(se)標(biao)(biao)志》的(de)(de)規定(ding)(ding)，氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)瓶(ping)(ping)應(ying)為銀灰色(se)(se)，并(bing)(bing)標(biao)(biao)有(you)“氬(ya)(ya)(ya)”（字的(de)(de)顏色(se)(se)為深綠(lv)色(se)(se)）字樣。使用(yong)(yong)(yong)(yong)(yong)(yong)中應(ying)注(zhu)(zhu)意(yi)(yi)瓶(ping)(ping)內氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)不(bu)得用(yong)(yong)(yong)(yong)(yong)(yong)盡，應(ying)保留(liu)0.5MPa的(de)(de)余氣(qi)(qi)(qi)(qi)，以防止(zhi)空氣(qi)(qi)(qi)(qi)混入(ru)而造成氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)不(bu)純(chun)。減(jian)(jian)壓(ya)器(qi)(qi)可用(yong)(yong)(yong)(yong)(yong)(yong)普通氧氣(qi)(qi)(qi)(qi)減(jian)(jian)壓(ya)器(qi)(qi)QD-3A 和(he)QD-2A代用(yong)(yong)(yong)(yong)(yong)(yong)。流(liu)(liu)(liu)量(liang)(liang)計(ji)(ji)(ji)是標(biao)(biao)定(ding)(ding)通入(ru)氣(qi)(qi)(qi)(qi)體(ti)(ti)流(liu)(liu)(liu)量(liang)(liang)的(de)(de)裝置，保證氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)在(zai)焊接過(guo)程中按給(gei)定(ding)(ding)的(de)(de)數量(liang)(liang)輸(shu)送。常用(yong)(yong)(yong)(yong)(yong)(yong)的(de)(de)有(you)LZB型(xing)玻璃(li)轉子流(liu)(liu)(liu)量(liang)(liang)計(ji)(ji)(ji)或醫用(yong)(yong)(yong)(yong)(yong)(yong)流(liu)(liu)(liu)量(liang)(liang)計(ji)(ji)(ji)均可。但應(ying)注(zhu)(zhu)意(yi)(yi)流(liu)(liu)(liu)量(liang)(liang)計(ji)(ji)(ji)的(de)(de)示值受氣(qi)(qi)(qi)(qi)體(ti)(ti)密度(du)的(de)(de)影(ying)響(xiang)。使用(yong)(yong)(yong)(yong)(yong)(yong)非氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)專用(yong)(yong)(yong)(yong)(yong)(yong)流(liu)(liu)(liu)量(liang)(liang)計(ji)(ji)(ji)時，表中的(de)(de)示值并(bing)(bing)非氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)的(de)(de)真實流(liu)(liu)(liu)量(liang)(liang)。現在(zai)已有(you)氬(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)減(jian)(jian)壓(ya)器(qi)(qi)和(he)流(liu)(liu)(liu)量(liang)(liang)計(ji)(ji)(ji)結(jie)合一體(ti)(ti)的(de)(de)儀(yi)器(qi)(qi)，如(ru)YQAR-195，以及CO2減(jian)(jian)壓(ya)器(qi)(qi)和(he)流(liu)(liu)(liu)量(liang)(liang)計(ji)(ji)(ji)一體(ti)(ti)的(de)(de)YQT-195。