?? ?擋板門，通常采用(yong)(yong)百葉窗式擋(dang)板結構，關斷時雙層擋(dang)板之間通入密(mi)封，實現隔離(li)關斷煙(yan)氣(qi)的作(zuo)用(yong)(yong)。按照其分類(lei)，可以分為電動煙(yan)氣(qi)擋(dang)板門(men)(men)、氣(qi)動煙(yan)氣(qi)擋(dang)板門(men)(men)和(he)手動煙(yan)氣(qi)擋(dang)板門(men)(men)。煙(yan)氣(qi)擋(dang)板門(men)(men)作(zuo)用(yong)(yong)，其煙(yan)氣(qi)擋(dang)板門(men)(men)引主要用(yong)(yong)于石油、石化(hua)、化(hua)工、電廠等煙(yan)氣(qi)脫硫系統吸收塔進、出口或(huo)旁路(lu)煙(yan)道(dao)上(shang)，或(huo)用(yong)(yong)于煙(yan)氣(qi)脫硝及煙(yan)氣(qi)除塵系統中，作(zuo)為煙(yan)風道(dao)管路(lu)關斷、調節用(yong)(yong)。
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? ? ? ?調(diao)節擋(dang)板(ban)(ban)風(feng)(feng)(feng)(feng)門(men)(men)(men)有普通型(xing)(xing)及(ji)密(mi)封型(xing)(xing)兩種結(jie)構。普通型(xing)(xing)調(diao)節擋(dang)板(ban)(ban)風(feng)(feng)(feng)(feng)門(men)(men)(men)僅起調(diao)節作(zuo)用，必須與(yu)其它類型(xing)(xing)隔絕門(men)(men)(men)連用；密(mi)封型(xing)(xing)調(diao)節擋(dang)板(ban)(ban)風(feng)(feng)(feng)(feng)門(men)(men)(men)即具有調(diao)節功(gong)能，又具有隔絕功(gong)能。對于(yu)小(xiao)容量機組(zu)可省去關斷風(feng)(feng)(feng)(feng)門(men)(men)(men)或隔絕門(men)(men)(men)。調(diao)節檔板(ban)(ban)風(feng)(feng)(feng)(feng)門(men)(men)(men)采(cai)用鋼(gang)板(ban)(ban)壓折焊(han)接(jie)(jie)結(jie)構，葉片(pian)為兩端尖角(jiao)的(de)流(liu)(liu)線(xian)形(xing)菱(ling)形(xing)結(jie)構，可以改(gai)變(bian)氣(qi)流(liu)(liu)尾流(liu)(liu)分布狀況。調(diao)節擋(dang)板(ban)(ban)風(feng)(feng)(feng)(feng)門(men)(men)(men)的(de)調(diao)節特性是在(zai)葉片(pian)開(kai)度25°～75° 范圍內，阻力系數與(yu)開(kai)度成近似線(xian)性比例(li)關系；風(feng)(feng)(feng)(feng)門(men)(men)(men)有電動(dong)(dong)、手動(dong)(dong)、氣(qi)動(dong)(dong)等驅動(dong)(dong)方式；有就(jiu)地、遠控(kong)(kong)、集(ji)控(kong)(kong)等控(kong)(kong)制方式。用于(yu)正壓熱(re)風(feng)(feng)(feng)(feng)系統的(de)風(feng)(feng)(feng)(feng)門(men)(men)(men)，軸(zhou)端軸(zhou)承處配(pei)有密(mi)封空氣(qi)接(jie)(jie)口，可接(jie)(jie)入(ru)密(mi)封空氣(qi)以阻斷熱(re)內外(wai)泄。
? ? ? 手動(dong)、電動(dong)或氣動(dong)執(zhi)行機(ji)構(gou)可以直接與驅動(dong)主軸(zhou)連接或采用(yong)曲柄連桿(gan)機(ji)構(gou)形成遠(yuan)方傳動(dong)，執(zhi)行機(ji)構(gou)也(ye)可以由(you)用(yong)戶(hu)自配。
? ? ? ?擋板門使用有限元方法進行強度(du)及變形計算，充分保證零部件的結構合(he)理。采用溫度(du)無極自動調節，節約能耗，使用壽命更長。
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