防爆加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)管(guan)(guan)(guan)是一種消耗電能轉換為熱(re)(re)(re)(re)(re)能,來對需加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)物料進(jin)行加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)。防爆加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)管(guan)(guan)(guan)是由外(wai)到(dao)里外(wai)殼(不繡鋼/碳鋼/銅/鈦材(cai)等(deng)、發熱(re)(re)(re)(re)(re)絲(鎳鉻鉛合(he)金)、填充物(氧化鎂,作(zuo)(zuo)用(yong)是導熱(re)(re)(re)(re)(re)、絕(jue)緣)、外(wai)殼(不繡鋼、碳鋼、鈦材(cai)、銅 等(deng))、陶瓷封(feng)頭(tou)(作(zuo)(zuo)用(yong):絕(jue)緣)、防爆盒組成的(de)(de)。加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)管(guan)(guan)(guan)在工(gong)作(zuo)(zuo)中低溫(wen)(wen)流(liu)體介(jie)質通過(guo)管(guan)(guan)(guan)道在壓力(li)作(zuo)(zuo)用(yong)下進(jin)入其輸入口,沿著電加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)容器內部特定換熱(re)(re)(re)(re)(re)流(liu)道,運用(yong)空氣(qi)電熱(re)(re)(re)(re)(re)管(guan)(guan)(guan)的(de)(de)流(liu)體熱(re)(re)(re)(re)(re)力(li)學原理(li)設(she)計的(de)(de)路(lu)徑,帶走空氣(qi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)管(guan)(guan)(guan)中的(de)(de)電熱(re)(re)(re)(re)(re)元(yuan)件工(gong)作(zuo)(zuo)中所(suo)產生的(de)(de)高溫(wen)(wen)熱(re)(re)(re)(re)(re)能量(liang),使空氣(qi)加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)管(guan)(guan)(guan)被加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)介(jie)質溫(wen)(wen)度(du)升高,加(jia)(jia)(jia)熱(re)(re)(re)(re)(re)管(guan)(guan)(guan)出口得到(dao)工(gong)藝(yi)要求的(de)(de)高溫(wen)(wen)介(jie)質。
產品特點
1.升(sheng)溫(wen)時(shi)(shi)間在試驗(yan)電壓下,元件從環境溫(wen)度升(sheng)至(zhi)試驗(yan)溫(wen)度時(shi)(shi)間應不大于15min
2.額定功率偏差在充(chong)分發熱的條件(jian)(jian)下,元(yuan)件(jian)(jian)的額定功率的偏差應不(bu)超過下列規定的范圍;對額定功率小(xiao)于等于100W的元(yuan)件(jian)(jian)為:士10%。對額定功率大于100W的元(yuan)件(jian)(jian)為+5%~- 10%或10W,取兩者中(zhong)的較大值。
3.泄露(lu)電(dian)流(liu)冷態(tai)(tai)(tai)泄露(lu)電(dian)流(liu)以及水壓和密封試(shi)(shi)驗后(hou)泄露(lu)電(dian)流(liu)應(ying)不(bu)(bu)超(chao)(chao)過(guo)(guo)0.5mA工(gong)作溫度(du)下的熱態(tai)(tai)(tai)泄露(lu)電(dian)流(liu)應(ying)不(bu)(bu)超(chao)(chao)過(guo)(guo)公式中的計(ji)算值,但不(bu)(bu)超(chao)(chao)過(guo)(guo)5mA I=1/6 (tTX0.00001) I一 熱態(tai)(tai)(tai)泄露(lu)電(dian)流(liu)mA t-發熱長度(du)mm T-工(gong)作溫度(du)C多(duo)個元件串(chuan)聯到電(dian)源中時,應(ying)以這一組元件為 整(zheng)體進行泄露(lu)電(dian)流(liu)試(shi)(shi)驗。
4. 絕(jue)(jue)緣(yuan)電(dian)阻(zu)出廠(chang)檢驗時冷(leng)態(tai)(tai)絕(jue)(jue)緣(yuan)電(dian)阻(zu)應不(bu)小(xiao)于(yu)50MQ密(mi)封(feng)試(shi)驗后,長(chang)期存(cun)放或者(zhe)使用(yong)后的絕(jue)(jue)緣(yuan)電(dian)阻(zu)應不(bu)消與MQ工(gong)作(zuo)溫度(du)(du)下的熱(re)態(tai)(tai)絕(jue)(jue)緣(yuan)電(dian)阻(zu)應不(bu)低于(yu)公式中的計算值,但(dan)應不(bu)小(xiao)于(yu)1MQ R=「(10-0.015T) /t」X0.001 R熱(re)態(tai)(tai)絕(jue)(jue)緣(yuan)電(dian)阻(zu)MQ t一-發 熱(re)長(chang)度(du)(du)mmT一工(gong)作(zuo)溫度(du)(du)°C
5.絕緣耐壓強度(du)元件應在規(gui)定的試(shi)驗條(tiao)件和(he)試(shi)驗電(dian)壓下保持(chi)1min,而無(wu)閃(shan)絡和(he)擊穿(chuan)現象
6.經受通斷電的能(neng)力元件應能(neng)在(zai)規定的試驗條件下經歷2000次通斷電試驗,而不發生損壞