鎢(wu)極氬弧焊接不(bu)銹鋼管設備主要有以下幾(ji)種
①. 鎢極(ji)氬弧(hu)焊(han)機
鎢(wu)(wu)極(ji)氬(ya)弧(hu)(hu)焊(han)(han)的(de)電(dian)(dian)源必須具(ju)有陡降或(huo)垂直陡降外特性，國內幾種專(zhuan)(zhuan)用的(de)鎢(wu)(wu)極(ji)氬(ya)弧(hu)(hu)焊(han)(han)機(ji)的(de)型號見表4-25。此外，焊(han)(han)接非重要(yao)件，可用焊(han)(han)條電(dian)(dian)弧(hu)(hu)焊(han)(han)的(de)弧(hu)(hu)焊(han)(han)發電(dian)(dian)機(ji)或(huo)弧(hu)(hu)焊(han)(han)整流器作弧(hu)(hu)焊(han)(han)電(dian)(dian)源，配以(yi)專(zhuan)(zhuan)用焊(han)(han)槍，也(ye)可實現手工鎢(wu)(wu)極(ji)氬(ya)弧(hu)(hu)焊(han)(han)。
專用(yong)焊機應(ying)具有下列(lie)功(gong)能：焊前(qian)提前(qian)1.5～4.0s輸(shu)送保(bao)護(hu)氣(qi)(qi)體，以驅趕輸(shu)氣(qi)(qi)管內和(he)(he)(he)焊接(jie)(jie)區間的空氣(qi)(qi)，防(fang)(fang)止(zhi)產(chan)生(sheng)(sheng)氣(qi)(qi)孔；焊后延遲5～15s停(ting)止(zhi)輸(shu)送保(bao)護(hu)氣(qi)(qi)體，以保(bao)證尚未冷(leng)卻的鎢極和(he)(he)(he)熔(rong)池能在保(bao)護(hu)氣(qi)(qi)氛下冷(leng)卻，防(fang)(fang)止(zhi)氧化和(he)(he)(he)產(chan)生(sheng)(sheng)氣(qi)(qi)孔；自(zi)動接(jie)(jie)通(tong)和(he)(he)(he)切(qie)斷保(bao)護(hu)氣(qi)(qi)源(yuan)及(ji)引(yin)(yin)弧、穩弧的電路，防(fang)(fang)止(zhi)接(jie)(jie)觸(chu)引(yin)(yin)弧燒(shao)損鎢極和(he)(he)(he)接(jie)(jie)頭產(chan)生(sheng)(sheng)夾鎢缺陷；控(kong)制電源(yuan)的通(tong)斷；焊接(jie)(jie)結束前(qian)電流能自(zi)動衰減，以消除弧坑(keng)和(he)(he)(he)防(fang)(fang)止(zhi)弧坑(keng)開(kai)裂。
②. 鎢極氬弧(hu)焊焊槍（arc welding gun）
鎢(wu)極(ji)氬(ya)(ya)弧(hu)焊(han)(han)焊(han)(han)槍(qiang)由(you)噴嘴、鎢(wu)極(ji)夾(jia)持裝置、導線(xian)、氣水輸送膠(jiao)管(guan)、啟動開關等零部件組成（結構詳見(jian)圖4-31）。根據(ju)適用的焊(han)(han)接(jie)電流大(da)小，焊(han)(han)槍(qiang)分水冷式和氣冷式兩類。常用水冷卻式焊(han)(han)槍(qiang)型號有QS-75°／400A、QS-75／500A等，可匹(pi)配在大(da)功率氬(ya)(ya)弧(hu)焊(han)(han)機(ji)(ji)上；氣冷卻式的焊(han)(han)槍(qiang)型號有QQ-85／100A、QQ-85／200A等·可匹(pi)配在小功率氬(ya)(ya)弧(hu)焊(han)(han)機(ji)(ji)上。
③. 氣體(ti)保(bao)護裝(zhuang)置
氣(qi)(qi)(qi)(qi)(qi)體(ti)(ti)保護(hu)裝(zhuang)置(zhi)有氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)瓶(ping)、減(jian)(jian)壓器(qi)和流(liu)量(liang)(liang)計(ji)。氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)瓶(ping)是(shi)儲存氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)壓力容器(qi)，使(shi)用(yong)(yong)(yong)時應(ying)(ying)注意安(an)全規(gui)則。按 GB 7144-1999《氣(qi)(qi)(qi)(qi)(qi)瓶(ping)顏(yan)色(se)(se)標(biao)志》的(de)(de)(de)規(gui)定，氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)瓶(ping)應(ying)(ying)為(wei)銀灰(hui)色(se)(se)，并(bing)標(biao)有“氬(ya)(ya)(ya)(ya)(ya)”（字的(de)(de)(de)顏(yan)色(se)(se)為(wei)深綠色(se)(se)）字樣(yang)。使(shi)用(yong)(yong)(yong)中應(ying)(ying)注意瓶(ping)內氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)不(bu)得用(yong)(yong)(yong)盡，應(ying)(ying)保留0.5MPa的(de)(de)(de)余(yu)氣(qi)(qi)(qi)(qi)(qi)，以防止空(kong)氣(qi)(qi)(qi)(qi)(qi)混入(ru)而造成氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)不(bu)純。減(jian)(jian)壓器(qi)可用(yong)(yong)(yong)普通氧氣(qi)(qi)(qi)(qi)(qi)減(jian)(jian)壓器(qi)QD-3A 和QD-2A代用(yong)(yong)(yong)。流(liu)量(liang)(liang)計(ji)是(shi)標(biao)定通入(ru)氣(qi)(qi)(qi)(qi)(qi)體(ti)(ti)流(liu)量(liang)(liang)的(de)(de)(de)裝(zhuang)置(zhi)，保證(zheng)氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)在焊接過程中按給定的(de)(de)(de)數(shu)量(liang)(liang)輸送。常用(yong)(yong)(yong)的(de)(de)(de)有LZB型玻璃轉子流(liu)量(liang)(liang)計(ji)或(huo)醫用(yong)(yong)(yong)流(liu)量(liang)(liang)計(ji)均可。但應(ying)(ying)注意流(liu)量(liang)(liang)計(ji)的(de)(de)(de)示(shi)值受氣(qi)(qi)(qi)(qi)(qi)體(ti)(ti)密度的(de)(de)(de)影(ying)響。使(shi)用(yong)(yong)(yong)非(fei)氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)專用(yong)(yong)(yong)流(liu)量(liang)(liang)計(ji)時，表中的(de)(de)(de)示(shi)值并(bing)非(fei)氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)真實流(liu)量(liang)(liang)。現在已有氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)減(jian)(jian)壓器(qi)和流(liu)量(liang)(liang)計(ji)結合一體(ti)(ti)的(de)(de)(de)儀器(qi)，如YQAR-195，以及(ji)CO2減(jian)(jian)壓器(qi)和流(liu)量(liang)(liang)計(ji)一體(ti)(ti)的(de)(de)(de)YQT-195。
