防爆加(jia)熱(re)管(guan)(guan)是一(yi)種消耗電能轉換為熱(re)能,來對需加(jia)熱(re)物料進行加(jia)熱(re)。防爆加(jia)熱(re)管(guan)(guan)是由(you)外(wai)到(dao)里外(wai)殼(不繡鋼(gang)(gang)/碳(tan)鋼(gang)(gang)/銅(tong)/鈦材等、發熱(re)絲(鎳鉻(ge)鉛合金)、填充物(氧化鎂,作(zuo)用(yong)(yong)(yong)(yong)是導熱(re)、絕緣(yuan))、外(wai)殼(不繡鋼(gang)(gang)、碳(tan)鋼(gang)(gang)、鈦材、銅(tong) 等)、陶瓷封(feng)頭(tou)(作(zuo)用(yong)(yong)(yong)(yong):絕緣(yuan))、防爆盒(he)組成的。加(jia)熱(re)管(guan)(guan)在工作(zuo)中(zhong)(zhong)低溫(wen)流體(ti)介質通過(guo)管(guan)(guan)道(dao)(dao)在壓力(li)作(zuo)用(yong)(yong)(yong)(yong)下進入其輸入口,沿(yan)著電加(jia)熱(re)容器內部(bu)特定換熱(re)流道(dao)(dao),運(yun)用(yong)(yong)(yong)(yong)空(kong)氣(qi)(qi)電熱(re)管(guan)(guan)的流體(ti)熱(re)力(li)學原理(li)設計(ji)的路徑,帶走空(kong)氣(qi)(qi)加(jia)熱(re)管(guan)(guan)中(zhong)(zhong)的電熱(re)元件工作(zuo)中(zhong)(zhong)所產(chan)生的高(gao)溫(wen)熱(re)能量,使空(kong)氣(qi)(qi)加(jia)熱(re)管(guan)(guan)被(bei)加(jia)熱(re)介質溫(wen)度升(sheng)高(gao),加(jia)熱(re)管(guan)(guan)出口得到(dao)工藝要求的高(gao)溫(wen)介質。
產品特點
1.升溫時間在試驗(yan)電壓下(xia),元件從環境溫度(du)升至試驗(yan)溫度(du)時間應不大(da)于15min
2.額定(ding)功(gong)(gong)率(lv)偏(pian)差在充分發熱的(de)(de)條件(jian)下(xia),元(yuan)件(jian)的(de)(de)額定(ding)功(gong)(gong)率(lv)的(de)(de)偏(pian)差應不超過(guo)下(xia)列規(gui)定(ding)的(de)(de)范(fan)圍;對額定(ding)功(gong)(gong)率(lv)小于等于100W的(de)(de)元(yuan)件(jian)為:士10%。對額定(ding)功(gong)(gong)率(lv)大(da)于100W的(de)(de)元(yuan)件(jian)為+5%~- 10%或10W,取兩者中的(de)(de)較大(da)值。
3.泄(xie)露電(dian)(dian)流冷態泄(xie)露電(dian)(dian)流以及水壓(ya)和密封試驗后泄(xie)露電(dian)(dian)流應不超(chao)過(guo)0.5mA工作溫(wen)度下的熱(re)態泄(xie)露電(dian)(dian)流應不超(chao)過(guo)公式中的計算值(zhi),但不超(chao)過(guo)5mA I=1/6 (tTX0.00001) I一 熱(re)態泄(xie)露電(dian)(dian)流mA t-發熱(re)長(chang)度mm T-工作溫(wen)度C多個元件(jian)串聯到電(dian)(dian)源中時,應以這一組元件(jian)為(wei) 整(zheng)體(ti)進(jin)行泄(xie)露電(dian)(dian)流試驗。
4. 絕(jue)(jue)緣電(dian)(dian)(dian)阻(zu)(zu)出(chu)廠檢驗(yan)時冷態(tai)絕(jue)(jue)緣電(dian)(dian)(dian)阻(zu)(zu)應(ying)(ying)不(bu)小于(yu)50MQ密封(feng)試驗(yan)后,長(chang)期(qi)存放或者(zhe)使用后的絕(jue)(jue)緣電(dian)(dian)(dian)阻(zu)(zu)應(ying)(ying)不(bu)消與MQ工作溫度下的熱態(tai)絕(jue)(jue)緣電(dian)(dian)(dian)阻(zu)(zu)應(ying)(ying)不(bu)低于(yu)公式(shi)中的計(ji)算(suan)值,但應(ying)(ying)不(bu)小于(yu)1MQ R=「(10-0.015T) /t」X0.001 R熱態(tai)絕(jue)(jue)緣電(dian)(dian)(dian)阻(zu)(zu)MQ t一-發 熱長(chang)度mmT一工作溫度°C
5.絕緣(yuan)耐壓強度(du)元件(jian)應在(zai)規定(ding)的試驗條件(jian)和試驗電壓下保持1min,而無閃絡和擊穿現(xian)象(xiang)
6.經受(shou)通斷(duan)電的能力(li)元件(jian)應能在規定的試(shi)驗(yan)條(tiao)件(jian)下(xia)經歷(li)2000次通斷(duan)電試(shi)驗(yan),而不發生損壞