防爆(bao)(bao)加(jia)(jia)熱(re)(re)(re)(re)管(guan)(guan)(guan)是(shi)(shi)一種消耗電(dian)(dian)(dian)能(neng)(neng)轉換(huan)為熱(re)(re)(re)(re)能(neng)(neng),來對需加(jia)(jia)熱(re)(re)(re)(re)物(wu)(wu)料進行加(jia)(jia)熱(re)(re)(re)(re)。防爆(bao)(bao)加(jia)(jia)熱(re)(re)(re)(re)管(guan)(guan)(guan)是(shi)(shi)由(you)外到(dao)里(li)外殼(不繡(xiu)鋼(gang)/碳(tan)鋼(gang)/銅/鈦材等、發熱(re)(re)(re)(re)絲(鎳鉻鉛(qian)合金)、填充物(wu)(wu)(氧化鎂,作(zuo)(zuo)用(yong)(yong)是(shi)(shi)導熱(re)(re)(re)(re)、絕緣(yuan))、外殼(不繡(xiu)鋼(gang)、碳(tan)鋼(gang)、鈦材、銅 等)、陶瓷封頭(tou)(作(zuo)(zuo)用(yong)(yong):絕緣(yuan))、防爆(bao)(bao)盒組成(cheng)的(de)(de)。加(jia)(jia)熱(re)(re)(re)(re)管(guan)(guan)(guan)在工作(zuo)(zuo)中(zhong)低溫(wen)(wen)流(liu)體介(jie)(jie)質(zhi)通過(guo)管(guan)(guan)(guan)道在壓力(li)作(zuo)(zuo)用(yong)(yong)下進入(ru)其輸(shu)入(ru)口,沿著(zhu)電(dian)(dian)(dian)加(jia)(jia)熱(re)(re)(re)(re)容器內部特定(ding)換(huan)熱(re)(re)(re)(re)流(liu)道,運(yun)用(yong)(yong)空氣(qi)電(dian)(dian)(dian)熱(re)(re)(re)(re)管(guan)(guan)(guan)的(de)(de)流(liu)體熱(re)(re)(re)(re)力(li)學原理設計(ji)的(de)(de)路徑,帶(dai)走空氣(qi)加(jia)(jia)熱(re)(re)(re)(re)管(guan)(guan)(guan)中(zhong)的(de)(de)電(dian)(dian)(dian)熱(re)(re)(re)(re)元(yuan)件工作(zuo)(zuo)中(zhong)所產生的(de)(de)高(gao)溫(wen)(wen)熱(re)(re)(re)(re)能(neng)(neng)量(liang),使空氣(qi)加(jia)(jia)熱(re)(re)(re)(re)管(guan)(guan)(guan)被加(jia)(jia)熱(re)(re)(re)(re)介(jie)(jie)質(zhi)溫(wen)(wen)度升高(gao),加(jia)(jia)熱(re)(re)(re)(re)管(guan)(guan)(guan)出口得到(dao)工藝要求的(de)(de)高(gao)溫(wen)(wen)介(jie)(jie)質(zhi)。
產(chan)品特點
1.升溫時間在試驗電(dian)壓下(xia),元件從環境溫度升至(zhi)試驗溫度時間應不大于(yu)15min
2.額(e)定(ding)功率(lv)(lv)偏差在充分發熱的條(tiao)件(jian)(jian)下(xia),元件(jian)(jian)的額(e)定(ding)功率(lv)(lv)的偏差應不超(chao)過下(xia)列規定(ding)的范圍;對額(e)定(ding)功率(lv)(lv)小于等于100W的元件(jian)(jian)為(wei):士10%。對額(e)定(ding)功率(lv)(lv)大于100W的元件(jian)(jian)為(wei)+5%~- 10%或10W,取兩者(zhe)中(zhong)的較大值。
3.泄(xie)露(lu)(lu)電流(liu)(liu)冷態泄(xie)露(lu)(lu)電流(liu)(liu)以及水壓和密封試(shi)驗(yan)(yan)后泄(xie)露(lu)(lu)電流(liu)(liu)應(ying)不(bu)超(chao)過0.5mA工作溫(wen)度下的熱態泄(xie)露(lu)(lu)電流(liu)(liu)應(ying)不(bu)超(chao)過公式中的計算值,但不(bu)超(chao)過5mA I=1/6 (tTX0.00001) I一 熱態泄(xie)露(lu)(lu)電流(liu)(liu)mA t-發熱長度mm T-工作溫(wen)度C多個元件(jian)串聯到電源(yuan)中時,應(ying)以這(zhe)一組元件(jian)為(wei) 整體進(jin)行泄(xie)露(lu)(lu)電流(liu)(liu)試(shi)驗(yan)(yan)。
4. 絕(jue)緣(yuan)(yuan)電(dian)阻(zu)出廠檢(jian)驗(yan)時冷態(tai)絕(jue)緣(yuan)(yuan)電(dian)阻(zu)應(ying)(ying)不(bu)小(xiao)于(yu)50MQ密封試驗(yan)后(hou),長期存放或(huo)者使(shi)用后(hou)的(de)絕(jue)緣(yuan)(yuan)電(dian)阻(zu)應(ying)(ying)不(bu)消(xiao)與(yu)MQ工(gong)作溫度(du)下的(de)熱(re)態(tai)絕(jue)緣(yuan)(yuan)電(dian)阻(zu)應(ying)(ying)不(bu)低于(yu)公(gong)式中的(de)計(ji)算(suan)值,但(dan)應(ying)(ying)不(bu)小(xiao)于(yu)1MQ R=「(10-0.015T) /t」X0.001 R熱(re)態(tai)絕(jue)緣(yuan)(yuan)電(dian)阻(zu)MQ t一-發 熱(re)長度(du)mmT一工(gong)作溫度(du)°C
5.絕緣耐(nai)壓(ya)強度元件(jian)應在規定的試驗(yan)條件(jian)和試驗(yan)電壓(ya)下保持1min,而無閃絡和擊穿現象
6.經(jing)受(shou)通(tong)(tong)斷電的能(neng)力(li)元(yuan)件應能(neng)在(zai)規(gui)定的試驗條件下經(jing)歷2000次通(tong)(tong)斷電試驗,而(er)不發生損壞