簡介:
電熱管又名發熱管、加熱管,學名管狀電加熱器元件,是在金屬管中放入卷線狀的發熱絲(電阻絲),
[電熱管] 電熱管
并在其周圍及空隙部分填入有良好耐熱性、導熱性和絕緣性的絕緣粉末(MgO),發熱絲兩端部具有引出棒或引出線接出。它具有結構簡單,機械強度高、熱效率高、安全可靠、安裝簡便、使用壽命長等特點。廣泛適用于各種硝石槽、水槽、油槽、酸堿槽、易熔金屬熔化爐、空氣加熱爐、干燥爐、干燥箱、熱壓模等裝置。
電熱管是專門將電能轉化為熱能的電器元件,由于其價格便宜,使用方便,安裝方便,無污染,被廣泛使用在各種加熱場合。
分類:
1、按照出線方式分類,可以分為單頭電熱管和雙頭電熱管。
2、按照材質分類,可以分為不銹鋼電熱管、石英電熱管、鐵氟龍電熱管、鈦電熱管
3、按照外形分類,可以分為直型電熱管、U型電熱管、L型電熱管、W型電熱管、翅片電熱管、異型電熱管
4、按照用途分類,可以分為干燒電熱管和水燒電熱管
5、按照加熱方式分類,可以分為常規電阻加熱管和輻射電熱管
材料:
外管一般材料有In800,In840,304,316L,310S,鋁,銅,低碳鋼等。
氧化鎂粉是根據不同的使用要求選擇不同規格,有高溫粉,中溫粉,等。
電阻絲為發熱件,材料一般有兩種,Ni-Cr絲和Fe-Cr-Al.
引線端子材料一般有兩種:不銹鋼和易削鐵。
封口材料有:環氧,硅膠,玻璃等。
管(guan)(guan)(guan)(guan)狀(zhuang)電(dian)(dian)(dian)熱元(yuan)(yuan)件(jian)(簡稱電(dian)(dian)(dian)熱管(guan)(guan)(guan)(guan))是一種(zhong)專(zhuan)門(men)將(jiang)電(dian)(dian)(dian)能轉化(hua)為(wei)熱能的(de)電(dian)(dian)(dian)器(qi)元(yuan)(yuan)件(jian)。它是以金屬管(guan)(guan)(guan)(guan)為(wei)外殼(包括不銹鋼、紫銅(tong)管(guan)(guan)(guan)(guan)),沿管(guan)(guan)(guan)(guan)內中心(xin)軸向均布螺旋電(dian)(dian)(dian)熱合金絲(鎳鉻(ge)、鐵鉻(ge)合金)其空隙填(tian)充壓實(shi)具有(you)良好絕緣導熱性(xing)能的(de)氧(yang)化(hua)鎂砂(sha),管(guan)(guan)(guan)(guan)口兩端用(yong)硅膠密封(feng),這種(zhong)金屬鎧(kai)裝電(dian)(dian)(dian)熱元(yuan)(yuan)件(jian)可(ke)以加(jia)熱空氣(qi),金屬模具和各種(zhong)液(ye)體。常見的(de)電(dian)(dian)(dian)熱管(guan)(guan)(guan)(guan)有(you)翅片(pian)(pian)電(dian)(dian)(dian)熱管(guan)(guan)(guan)(guan)、翅片(pian)(pian)電(dian)(dian)(dian)熱管(guan)(guan)(guan)(guan)、翅片(pian)(pian)電(dian)(dian)(dian)熱管(guan)(guan)(guan)(guan)、鐵氟龍電(dian)(dian)(dian)熱管(guan)(guan)(guan)(guan)、石英電(dian)(dian)(dian)熱管(guan)(guan)(guan)(guan)等(deng)等(deng)。由于(yu)其價格便宜,使用(yong)方便,安(an)裝方便,無污(wu)染,被廣泛使用(yong)在各種(zhong)加(jia)熱場合。
功能特點:
體積小、功率(lv)大:加(jia)(jia)(jia)(jia)熱器(qi)(qi)首要采(cai)用(yong)集束(shu)式管狀電熱元件(jian)。熱呼應快、控溫(wen)(wen)精度高(gao)(gao),綜合(he)熱效(xiao)率(lv)高(gao)(gao)。加(jia)(jia)(jia)(jia)熱溫(wen)(wen)度高(gao)(gao):加(jia)(jia)(jia)(jia)熱器(qi)(qi)設計最高(gao)(gao)任務(wu)溫(wen)(wen)度可達850℃。介質(zhi)出(chu)口溫(wen)(wen)度平均(jun),控溫(wen)(wen)精度高(gao)(gao)。使用(yong)局限廣、順應性(xing)(xing)強:該(gai)加(jia)(jia)(jia)(jia)熱器(qi)(qi)可合(he)用(yong)于(yu)防爆(bao)(bao)或通俗(su)場所(suo),防爆(bao)(bao)品(pin)級可達dⅡB級和C級,耐(nai)壓可達20MPa。壽命長、牢靠性(xing)(xing)高(gao)(gao):該(gai)加(jia)(jia)(jia)(jia)熱器(qi)(qi)采(cai)用(yong)非凡電熱資料制造,設計外表功率(lv)負荷低,并(bing)采(cai)用(yong)多重維護,使電加(jia)(jia)(jia)(jia)熱器(qi)(qi)平安性(xing)(xing)和壽命大大添加(jia)(jia)(jia)(jia)。可全主(zhu)動化節(jie)制:依據要求(qiu)經過(guo)加(jia)(jia)(jia)(jia)熱器(qi)(qi)電路設計,可便利完(wan)成(cheng)出(chu)口溫(wen)(wen)度、流量、壓力等參數主(zhu)動節(jie)制,并(bing)可與機算機聯網。節(jie)能(neng)結果(guo)明顯,電能(neng)發生(sheng)的熱量幾乎100%傳給加(jia)(jia)(jia)(jia)熱介質(zhi)。
常見種類:
翅片電熱管
翅片(pian)(pian)電(dian)(dian)熱(re)(re)(re)(re)(re)管是(shi)(shi)(shi)一(yi)種(zhong)消耗電(dian)(dian)能轉換為熱(re)(re)(re)(re)(re)能,來對(dui)需加熱(re)(re)(re)(re)(re)物料進(jin)行加熱(re)(re)(re)(re)(re)。在工作(zuo)中低溫流體介(jie)質通過(guo)管道在壓力作(zuo)用下進(jin)入(ru)其輸入(ru)口,沿著電(dian)(dian)加熱(re)(re)(re)(re)(re)容器內(nei)部特定換熱(re)(re)(re)(re)(re)流道,運(yun)用流體熱(re)(re)(re)(re)(re)力學原理設計的(de)(de)路徑,帶走電(dian)(dian)熱(re)(re)(re)(re)(re)元(yuan)(yuan)件(jian)(jian)工作(zuo)中所產生的(de)(de)高溫熱(re)(re)(re)(re)(re)能量,使被加熱(re)(re)(re)(re)(re)介(jie)質溫度升高,翅片(pian)(pian)電(dian)(dian)熱(re)(re)(re)(re)(re)管出(chu)口得(de)到工藝要求的(de)(de)高溫介(jie)質。 翅片(pian)(pian)式管狀電(dian)(dian)加熱(re)(re)(re)(re)(re)元(yuan)(yuan)件(jian)(jian),是(shi)(shi)(shi)在普通元(yuan)(yuan)件(jian)(jian)表面纏繞(rao)金屬散(san)熱(re)(re)(re)(re)(re)片(pian)(pian),與普通元(yuan)(yuan)件(jian)(jian)相(xiang)比散(san)熱(re)(re)(re)(re)(re)面積(ji)擴大(da)了(le)2~3倍,即翅片(pian)(pian)元(yuan)(yuan)件(jian)(jian)所允許的(de)(de)表面功率負荷是(shi)(shi)(shi)普通元(yuan)(yuan)件(jian)(jian)的(de)(de)3~4 倍。由(you)于元(yuan)(yuan)件(jian)(jian)的(de)(de)長(chang)度縮短,使得(de)本身的(de)(de)熱(re)(re)(re)(re)(re)損失減小,在相(xiang)同的(de)(de)功率條件(jian)(jian)下,具有升溫快、熱(re)(re)(re)(re)(re)效率高、使用壽(shou)命(ming)長(chang)、加熱(re)(re)(re)(re)(re)裝置體積(ji)小,成本低等優點。它(ta)可以安裝在吹風管道中或其它(ta)靜(jing)止、流動空氣的(de)(de)加熱(re)(re)(re)(re)(re)場合(he)。
法(fa)蘭電熱管
法蘭電(dian)熱(re)(re)管(guan)(也稱插入(ru)式(shi)電(dian)加熱(re)(re)器(qi)):是(shi)采用(yong)U型(xing)管(guan)狀(zhuang)電(dian)熱(re)(re)元件(jian),依據加熱(re)(re)不同介(jie)(jie)質設(she)計(ji)規范,按照功率(lv)配置要(yao)求(qiu)裝配在法蘭蓋上(shang),插入(ru)需加熱(re)(re)物(wu)料中,發(fa)熱(re)(re)元件(jian)工(gong)作時所發(fa)出(chu)的(de)大量熱(re)(re)量傳(chuan)導給被加熱(re)(re)介(jie)(jie)質使(shi)(shi)介(jie)(jie)質溫度(du)(du)升高,達到(dao)所需的(de)工(gong)藝(yi)(yi)要(yao)求(qiu)。當介(jie)(jie)質溫度(du)(du)達到(dao)工(gong)藝(yi)(yi)要(yao)求(qiu)的(de)設(she)定值(zhi)時,控(kong)制(zhi)系統根(gen)據溫度(du)(du)傳(chuan)感器(qi)信號,經PID運算(suan)后調節電(dian)加熱(re)(re)器(qi)輸出(chu)功率(lv),對發(fa)熱(re)(re)元件(jian)的(de)電(dian)阻性負載實(shi)現溫度(du)(du)控(kong)制(zhi)。使(shi)(shi)介(jie)(jie)質溫度(du)(du)均勻,達到(dao)所需要(yao)求(qiu);當發(fa)熱(re)(re)元件(jian)超(chao)溫或低(di)液位時,發(fa)熱(re)(re)元件(jian)的(de)聯鎖保護(hu)裝置立即切斷加熱(re)(re)電(dian)源避(bi)免發(fa)熱(re)(re)元件(jian)燒壞,延長(chang)使(shi)(shi)用(yong)壽命。 法蘭電(dian)熱(re)(re)管(guan)主要(yao)針對石油、化工(gong)、食(shi)品(pin)、機械等行業各類儲罐、容器(qi)、油箱(xiang)內物(wu)料保溫和加熱(re)(re)。連接(jie)方(fang)式(shi)可采用(yong)法蘭式(shi)或螺紋端面密封(feng)。
普通(tong)型管(guan)狀(zhuang)電加(jia)熱器(qi)特(te)點:
1、本電(dian)(dian)(dian)加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)有加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)芯子(zi)和護(hu)(hu)(hu)套(tao)管構成,HRY1型護(hu)(hu)(hu)套(tao)式電(dian)(dian)(dian)加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)芯子(zi)用(yong)(yong)(yong)管狀電(dian)(dian)(dian)熱(re)(re)(re)(re)元件作(zuo)為熱(re)(re)(re)(re)源,護(hu)(hu)(hu)套(tao)管選用(yong)(yong)(yong)薄型不(bu)銹鋼制成,它散熱(re)(re)(re)(re)面(mian)積(ji)較大,傳熱(re)(re)(re)(re)快,接線端設備有些分為普通型(選用(yong)(yong)(yong)鐵制拉伸杯子(zi)型罩(zhao)殼(ke))和特別型(選用(yong)(yong)(yong)螺栓式隔爆(bao)型設備罩(zhao)殼(ke)密封),特別型具(ju)有達到防爆(bao)標志dIICT4.防護(hu)(hu)(hu)等級IP65系(xi)列(lie)規范的(de)(de)要求。2、電(dian)(dian)(dian)加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)與(yu)油(you)箱(xiang)容器(qi)(qi)體(ti)選用(yong)(yong)(yong)法蘭(lan)連接,護(hu)(hu)(hu)套(tao)將加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)芯子(zi)與(yu)被加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)油(you)液阻隔,在修(xiu)理電(dian)(dian)(dian)加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)時,不(bu)需要放掉油(you)箱(xiang)中的(de)(de)油(you)液,僅(jin)需抽出加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)芯子(zi),替換一個(ge)新的(de)(de)加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)芯子(zi)即可(ke),修(xiu)理便利。3、在設計(ji)時應思考護(hu)(hu)(hu)套(tao)與(yu)熱(re)(re)(re)(re)加(jia)(jia)(jia)(jia)(jia)油(you)液接觸面(mian)積(ji),使(shi)油(you)液不(bu)會(hui)因加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)溫度過(guo)高(gao)而(er)局部碳化,該類(lei)型加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)器(qi)(qi)只適(shi)用(yong)(yong)(yong)于導熱(re)(re)(re)(re)油(you)或受熱(re)(re)(re)(re)作(zuo)用(yong)(yong)(yong)較好的(de)(de)油(you)液與(yu)介質(zhi)內加(jia)(jia)(jia)(jia)(jia)熱(re)(re)(re)(re)運用(yong)(yong)(yong)。