防爆(bao)加(jia)(jia)熱(re)(re)(re)(re)管(guan)是(shi)(shi)一(yi)種(zhong)消耗(hao)電(dian)能(neng)轉換(huan)為熱(re)(re)(re)(re)能(neng),來(lai)對需加(jia)(jia)熱(re)(re)(re)(re)物料進行(xing)加(jia)(jia)熱(re)(re)(re)(re)。防爆(bao)加(jia)(jia)熱(re)(re)(re)(re)管(guan)是(shi)(shi)由外(wai)到里外(wai)殼(不(bu)繡(xiu)鋼(gang)/碳(tan)鋼(gang)/銅/鈦(tai)材等、發(fa)熱(re)(re)(re)(re)絲(鎳鉻鉛合金(jin))、填(tian)充物(氧化鎂,作(zuo)用(yong)是(shi)(shi)導熱(re)(re)(re)(re)、絕緣(yuan))、外(wai)殼(不(bu)繡(xiu)鋼(gang)、碳(tan)鋼(gang)、鈦(tai)材、銅 等)、陶瓷(ci)封頭(作(zuo)用(yong):絕緣(yuan))、防爆(bao)盒組成的。加(jia)(jia)熱(re)(re)(re)(re)管(guan)在工作(zuo)中(zhong)低溫流(liu)體介質(zhi)(zhi)通過管(guan)道在壓力(li)作(zuo)用(yong)下進入(ru)其輸入(ru)口,沿著電(dian)加(jia)(jia)熱(re)(re)(re)(re)容器(qi)內部特定換(huan)熱(re)(re)(re)(re)流(liu)道,運用(yong)空氣電(dian)熱(re)(re)(re)(re)管(guan)的流(liu)體熱(re)(re)(re)(re)力(li)學(xue)原理設計的路(lu)徑,帶走空氣加(jia)(jia)熱(re)(re)(re)(re)管(guan)中(zhong)的電(dian)熱(re)(re)(re)(re)元(yuan)件工作(zuo)中(zhong)所產生的高溫熱(re)(re)(re)(re)能(neng)量,使空氣加(jia)(jia)熱(re)(re)(re)(re)管(guan)被加(jia)(jia)熱(re)(re)(re)(re)介質(zhi)(zhi)溫度(du)升(sheng)高,加(jia)(jia)熱(re)(re)(re)(re)管(guan)出口得到工藝要求的高溫介質(zhi)(zhi)。
產品特(te)點
1.升溫(wen)時間(jian)在試驗電壓下,元件從環境溫(wen)度升至試驗溫(wen)度時間(jian)應(ying)不大于(yu)15min
2.額定(ding)(ding)功率(lv)偏(pian)(pian)差在充分發熱(re)的條件(jian)下(xia),元件(jian)的額定(ding)(ding)功率(lv)的偏(pian)(pian)差應不超過下(xia)列規定(ding)(ding)的范圍;對額定(ding)(ding)功率(lv)小于(yu)等于(yu)100W的元件(jian)為(wei):士10%。對額定(ding)(ding)功率(lv)大(da)于(yu)100W的元件(jian)為(wei)+5%~- 10%或10W,取兩者中的較大(da)值。
3.泄(xie)(xie)露(lu)電(dian)(dian)(dian)流(liu)冷態泄(xie)(xie)露(lu)電(dian)(dian)(dian)流(liu)以及水(shui)壓和密封試驗后泄(xie)(xie)露(lu)電(dian)(dian)(dian)流(liu)應不超(chao)過(guo)0.5mA工作溫度下的(de)熱態泄(xie)(xie)露(lu)電(dian)(dian)(dian)流(liu)應不超(chao)過(guo)公式中(zhong)(zhong)的(de)計算值,但不超(chao)過(guo)5mA I=1/6 (tTX0.00001) I一 熱態泄(xie)(xie)露(lu)電(dian)(dian)(dian)流(liu)mA t-發(fa)熱長度mm T-工作溫度C多個元件(jian)串聯到(dao)電(dian)(dian)(dian)源中(zhong)(zhong)時,應以這一組元件(jian)為 整體進行泄(xie)(xie)露(lu)電(dian)(dian)(dian)流(liu)試驗。
4. 絕緣(yuan)電阻出廠檢(jian)驗時冷態絕緣(yuan)電阻應不小于50MQ密(mi)封試驗后(hou),長期存放或者使用后(hou)的(de)絕緣(yuan)電阻應不消(xiao)與MQ工作溫(wen)度(du)下的(de)熱態絕緣(yuan)電阻應不低于公式中的(de)計算值,但應不小于1MQ R=「(10-0.015T) /t」X0.001 R熱態絕緣(yuan)電阻MQ t一(yi)-發 熱長度(du)mmT一(yi)工作溫(wen)度(du)°C
5.絕緣耐壓強度元件應在規定的試驗條件和試驗電(dian)壓下保持1min,而無閃絡和擊穿現象
6.經受通(tong)斷電(dian)的能力元件(jian)應能在規定的試驗(yan)條件(jian)下經歷(li)2000次通(tong)斷電(dian)試驗(yan),而不發生損壞