防(fang)爆加熱(re)(re)管是一(yi)種消耗電(dian)能(neng)轉換為(wei)熱(re)(re)能(neng),來(lai)對(dui)需加熱(re)(re)物料(liao)進行加熱(re)(re)。防(fang)爆加熱(re)(re)管是由外到(dao)里外殼(ke)(不(bu)繡(xiu)鋼(gang)(gang)/碳鋼(gang)(gang)/銅(tong)/鈦材等、發熱(re)(re)絲(鎳鉻鉛合(he)金)、填充(chong)物(氧化鎂,作(zuo)用(yong)是導(dao)熱(re)(re)、絕緣(yuan))、外殼(ke)(不(bu)繡(xiu)鋼(gang)(gang)、碳鋼(gang)(gang)、鈦材、銅(tong) 等)、陶瓷封頭(作(zuo)用(yong):絕緣(yuan))、防(fang)爆盒組成的。加熱(re)(re)管在工作(zuo)中低(di)溫流體介(jie)質(zhi)(zhi)通過管道(dao)在壓力作(zuo)用(yong)下進入其輸入口(kou),沿著(zhu)電(dian)加熱(re)(re)容器內部特定(ding)換熱(re)(re)流道(dao),運用(yong)空氣(qi)電(dian)熱(re)(re)管的流體熱(re)(re)力學原理設計的路徑(jing),帶走空氣(qi)加熱(re)(re)管中的電(dian)熱(re)(re)元(yuan)件工作(zuo)中所(suo)產生的高(gao)溫熱(re)(re)能(neng)量,使空氣(qi)加熱(re)(re)管被加熱(re)(re)介(jie)質(zhi)(zhi)溫度升高(gao),加熱(re)(re)管出口(kou)得(de)到(dao)工藝要求的高(gao)溫介(jie)質(zhi)(zhi)。
產品特(te)點
1.升(sheng)溫時間在試驗電壓下,元件從環境溫度升(sheng)至試驗溫度時間應不大于15min
2.額(e)(e)定(ding)(ding)(ding)功(gong)(gong)率(lv)偏(pian)差在充分(fen)發熱(re)的(de)條件下,元(yuan)件的(de)額(e)(e)定(ding)(ding)(ding)功(gong)(gong)率(lv)的(de)偏(pian)差應不超過下列(lie)規定(ding)(ding)(ding)的(de)范圍;對額(e)(e)定(ding)(ding)(ding)功(gong)(gong)率(lv)小于等于100W的(de)元(yuan)件為:士10%。對額(e)(e)定(ding)(ding)(ding)功(gong)(gong)率(lv)大于100W的(de)元(yuan)件為+5%~- 10%或10W,取兩者中(zhong)的(de)較大值。
3.泄(xie)露(lu)(lu)電(dian)(dian)流冷態泄(xie)露(lu)(lu)電(dian)(dian)流以及水壓和(he)密封試(shi)驗(yan)后泄(xie)露(lu)(lu)電(dian)(dian)流應不(bu)(bu)(bu)超(chao)過0.5mA工作溫(wen)(wen)度(du)下的熱態泄(xie)露(lu)(lu)電(dian)(dian)流應不(bu)(bu)(bu)超(chao)過公式中的計算值,但不(bu)(bu)(bu)超(chao)過5mA I=1/6 (tTX0.00001) I一 熱態泄(xie)露(lu)(lu)電(dian)(dian)流mA t-發熱長度(du)mm T-工作溫(wen)(wen)度(du)C多個(ge)元件串聯到(dao)電(dian)(dian)源中時,應以這一組(zu)元件為 整體(ti)進行(xing)泄(xie)露(lu)(lu)電(dian)(dian)流試(shi)驗(yan)。
4. 絕(jue)(jue)緣(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)出廠檢驗(yan)時(shi)冷態(tai)(tai)絕(jue)(jue)緣(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)應不小(xiao)于50MQ密(mi)封(feng)試(shi)驗(yan)后,長(chang)期存放或(huo)者使(shi)用后的絕(jue)(jue)緣(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)應不消(xiao)與MQ工作溫度下的熱態(tai)(tai)絕(jue)(jue)緣(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)應不低于公式(shi)中(zhong)的計算值,但應不小(xiao)于1MQ R=「(10-0.015T) /t」X0.001 R熱態(tai)(tai)絕(jue)(jue)緣(yuan)(yuan)(yuan)電(dian)(dian)(dian)阻(zu)(zu)MQ t一(yi)-發(fa) 熱長(chang)度mmT一(yi)工作溫度°C
5.絕緣耐壓強度(du)元件(jian)應在規定的試驗條件(jian)和(he)試驗電(dian)壓下(xia)保(bao)持1min,而無閃(shan)絡和(he)擊穿現象
6.經(jing)受通斷電的能力元件(jian)應能在規定的試(shi)(shi)驗(yan)條件(jian)下經(jing)歷2000次通斷電試(shi)(shi)驗(yan),而不發生損壞