鎢極氬弧焊接不銹鋼管(guan)設備主要(yao)有(you)以下幾種

①. 鎢(wu)極氬弧焊機(ji)

   鎢極氬弧(hu)焊(han)(han)(han)的(de)電源必須具有(you)陡(dou)降或垂直陡(dou)降外特性(xing)，國(guo)內幾種專用(yong)的(de)鎢極氬弧(hu)焊(han)(han)(han)機(ji)的(de)型(xing)號見表(biao)4-25。此外，焊(han)(han)(han)接非重(zhong)要(yao)件，可用(yong)焊(han)(han)(han)條電弧(hu)焊(han)(han)(han)的(de)弧(hu)焊(han)(han)(han)發(fa)電機(ji)或弧(hu)焊(han)(han)(han)整(zheng)流器作弧(hu)焊(han)(han)(han)電源，配以專用(yong)焊(han)(han)(han)槍，也可實現手工鎢極氬弧(hu)焊(han)(han)(han)。

   專用焊(han)機應具有下列功能：焊(han)前提前1.5～4.0s輸送(song)保護(hu)(hu)氣(qi)體，以驅趕(gan)輸氣(qi)管內和(he)(he)焊(han)接(jie)區(qu)間的(de)空氣(qi)，防(fang)止(zhi)產生(sheng)氣(qi)孔(kong)；焊(han)后延遲5～15s停止(zhi)輸送(song)保護(hu)(hu)氣(qi)體，以保證尚未冷(leng)卻的(de)鎢(wu)(wu)極和(he)(he)熔池(chi)能在(zai)保護(hu)(hu)氣(qi)氛下冷(leng)卻，防(fang)止(zhi)氧化(hua)和(he)(he)產生(sheng)氣(qi)孔(kong)；自動接(jie)通和(he)(he)切斷保護(hu)(hu)氣(qi)源(yuan)及引弧、穩(wen)弧的(de)電(dian)路，防(fang)止(zhi)接(jie)觸(chu)引弧燒損鎢(wu)(wu)極和(he)(he)接(jie)頭產生(sheng)夾鎢(wu)(wu)缺(que)陷；控制電(dian)源(yuan)的(de)通斷；焊(han)接(jie)結(jie)束(shu)前電(dian)流能自動衰減，以消(xiao)除弧坑和(he)(he)防(fang)止(zhi)弧坑開裂。

②. 鎢極氬弧焊焊槍（arc welding gun）

   鎢(wu)極氬(ya)弧焊(han)(han)焊(han)(han)槍(qiang)(qiang)由噴(pen)嘴、鎢(wu)極夾持裝置、導線、氣水輸送膠管、啟動開關等零部(bu)件組成（結構詳見圖4-31）。根據適用的焊(han)(han)接電流(liu)大(da)小(xiao)，焊(han)(han)槍(qiang)(qiang)分水冷式(shi)(shi)和(he)氣冷式(shi)(shi)兩類。常用水冷卻式(shi)(shi)焊(han)(han)槍(qiang)(qiang)型(xing)號有QS-75°／400A、QS-75／500A等，可匹(pi)配在大(da)功率(lv)(lv)氬(ya)弧焊(han)(han)機上(shang)；氣冷卻式(shi)(shi)的焊(han)(han)槍(qiang)(qiang)型(xing)號有QQ-85／100A、QQ-85／200A等·可匹(pi)配在小(xiao)功率(lv)(lv)氬(ya)弧焊(han)(han)機上(shang)。

③. 氣體保(bao)護裝置(zhi)

   氣(qi)(qi)(qi)(qi)(qi)體保(bao)護裝置(zhi)有(you)氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)瓶(ping)(ping)、減(jian)(jian)(jian)(jian)壓(ya)器(qi)和流(liu)量(liang)計(ji)(ji)。氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)瓶(ping)(ping)是儲存(cun)氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)壓(ya)力容器(qi)，使用(yong)(yong)時應(ying)(ying)注意安全規(gui)則。按(an) GB 7144-1999《氣(qi)(qi)(qi)(qi)(qi)瓶(ping)(ping)顏色(se)標志》的(de)(de)(de)規(gui)定，氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)瓶(ping)(ping)應(ying)(ying)為(wei)銀灰色(se)，并(bing)標有(you)“氬(ya)(ya)(ya)(ya)(ya)”（字的(de)(de)(de)顏色(se)為(wei)深(shen)綠(lv)色(se)）字樣。使用(yong)(yong)中(zhong)(zhong)應(ying)(ying)注意瓶(ping)(ping)內氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)不得(de)用(yong)(yong)盡，應(ying)(ying)保(bao)留0.5MPa的(de)(de)(de)余氣(qi)(qi)(qi)(qi)(qi)，以防止空(kong)氣(qi)(qi)(qi)(qi)(qi)混入而造成氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)不純。減(jian)(jian)(jian)(jian)壓(ya)器(qi)可(ke)用(yong)(yong)普(pu)通(tong)氧(yang)氣(qi)(qi)(qi)(qi)(qi)減(jian)(jian)(jian)(jian)壓(ya)器(qi)QD-3A 和QD-2A代(dai)用(yong)(yong)。流(liu)量(liang)計(ji)(ji)是標定通(tong)入氣(qi)(qi)(qi)(qi)(qi)體流(liu)量(liang)的(de)(de)(de)裝置(zhi)，保(bao)證氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)在焊(han)接過(guo)程中(zhong)(zhong)按(an)給定的(de)(de)(de)數量(liang)輸送。常用(yong)(yong)的(de)(de)(de)有(you)LZB型玻(bo)璃轉子流(liu)量(liang)計(ji)(ji)或(huo)醫用(yong)(yong)流(liu)量(liang)計(ji)(ji)均可(ke)。但應(ying)(ying)注意流(liu)量(liang)計(ji)(ji)的(de)(de)(de)示(shi)(shi)值(zhi)受(shou)氣(qi)(qi)(qi)(qi)(qi)體密度的(de)(de)(de)影(ying)響。使用(yong)(yong)非氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)專用(yong)(yong)流(liu)量(liang)計(ji)(ji)時，表中(zhong)(zhong)的(de)(de)(de)示(shi)(shi)值(zhi)并(bing)非氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)真實流(liu)量(liang)。現在已(yi)有(you)氬(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)(qi)減(jian)(jian)(jian)(jian)壓(ya)器(qi)和流(liu)量(liang)計(ji)(ji)結(jie)合一(yi)(yi)體的(de)(de)(de)儀器(qi)，如YQAR-195，以及CO2減(jian)(jian)(jian)(jian)壓(ya)器(qi)和流(liu)量(liang)計(ji)(ji)一(yi)(yi)體的(de)(de)(de)YQT-195。