儀(yi)(yi)表(biao)需(xu)要電伴熱保(bao)溫(wen),要檢查電伴熱情況,如遇到問題需(xu)及時(shi)處理。在冬(dong)季,檢查儀(yi)(yi)表(biao)保(bao)溫(wen)是日常維護工(gong)作(zuo)(zuo)的重要內容之一,保(bao)證儀(yi)(yi)表(biao)測量系(xi)統(tong)的正常運行(xing),是不可忽視的一項工(gong)作(zuo)(zuo)。
冬季,儀(yi)表員工檢(jian)查儀(yi)表保(bao)(bao)(bao)溫(wen)狀況(kuang),檢(jian)查安裝工藝設備(bei)與管(guan)(guan)線上的儀(yi)表,如橢圓齒輪(lun)(lun)流量計(ji)(ji)、電磁流量計(ji)(ji)、旋渦流量計(ji)(ji)(渦街流量計(ji)(ji))、渦輪(lun)(lun)流量計(ji)(ji)、質(zhi)量流量計(ji)(ji)、法(fa)蘭式差(cha)壓(ya)變送(song)器(qi)、浮(fu)筒液(ye)位(wei)計(ji)(ji)和(he)調節(jie)閥閥等保(bao)(bao)(bao)溫(wen)狀況(kuang),觀察保(bao)(bao)(bao)溫(wen)材料有(you)否脫落,有(you)否被雨水打濕造成(cheng)保(bao)(bao)(bao)溫(wen)材料不起作用.同時(shi),檢(jian)查差(cha)壓(ya)變送(song)器(qi)和(he)壓(ya)力變送(song)器(qi)導(dao)壓(ya)管(guan)(guan)線保(bao)(bao)(bao)溫(wen)情(qing)況(kuang),由于(yu)導(dao)壓(ya)管(guan)(guan)內物(wu)料由于(yu)處在(zai)靜止狀態,有(you)時(shi)除保(bao)(bao)(bao)溫(wen)以外尚需(xu)伴熱(re)。
伴熱有電伴熱和蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)伴(ban)熱(re)(re)(re)(re).相(xiang)對(dui)而言,電伴(ban)熱(re)(re)(re)(re)比(bi)較(jiao)方便,應檢(jian)查(cha)電源電壓(ya)(ya),保證正常運行.蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)伴(ban)熱(re)(re)(re)(re)是化(hua)(hua)工企業最常見的(de)伴(ban)熱(re)(re)(re)(re)形式,對(dui)于蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)伴(ban)熱(re)(re)(re)(re),由(you)于冬天氣(qi)溫(wen)變(bian)化(hua)(hua)很(hen)大(da),溫(wen)差(cha)可(ke)達20℃左右,儀(yi)(yi)表(biao)工應根據氣(qi)溫(wen)變(bian)化(hua)(hua)調(diao)節伴(ban)熱(re)(re)(re)(re)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)流量.蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)流量大(da)小可(ke)通過觀察(cha)伴(ban)熱(re)(re)(re)(re)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)管(guan)(guan)疏水(shui)器排汽(qi)(qi)(qi)(qi)(qi)狀況訣定(ding),疏水(shui)器連續排汽(qi)(qi)(qi)(qi)(qi)說(shuo)明(ming)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)流量過大(da),很(hen)長時(shi)間不(bu)排汽(qi)(qi)(qi)(qi)(qi)說(shuo)明(ming)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)流量太小。蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)流量調(diao)節裕度是很(hen)大(da)的(de),因為(wei)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)伴(ban)熱(re)(re)(re)(re)是為(wei)了(le)保證導(dao)壓(ya)(ya)管(guan)(guan)內(nei)物料不(bu)凍,所以伴(ban)熱(re)(re)(re)(re)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)量不(bu)是愈大(da)愈好(hao),有(you)些儀(yi)(yi)表(biao)工為(wei)了(le)省事,加大(da)伴(ban)熱(re)(re)(re)(re)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)量,天氣(qi)暖和了(le)也不(bu)關小蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)流量,這樣一是造成(cheng)不(bu)必(bi)(bi)要的(de)能源浪費,有(you)時(shi)甚至造成(cheng)測量誤差(cha),因為(wei)化(hua)(hua)工物料冰(bing)點(dian)和沸點(dian)各不(bu)相(xiang)同,對(dui)于沸點(dian)比(bi)較(jiao)低的(de)物料保溫(wen)伴(ban)熱(re)(re)(re)(re)過高(gao),會出(chu)現汽(qi)(qi)(qi)(qi)(qi)化(hua)(hua)現象,導(dao)壓(ya)(ya)管(guan)(guan)內(nei)出(chu)現汽(qi)(qi)(qi)(qi)(qi)液兩相(xiang),引起(qi)輸(shu)出(chu)振(zhen)蕩,所以根據冬天天氣(qi)變(bian)化(hua)(hua)及時(shi)調(diao)整(zheng)伴(ban)熱(re)(re)(re)(re)蒸(zheng)(zheng)汽(qi)(qi)(qi)(qi)(qi)量是十分必(bi)(bi)要的(de).