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23
2018-06
電熱管在電鍍行業的應用
在電(dian)(dian)(dian)(dian)鍍(du)工藝施工中,許多溶(rong)液是需(xu)要加(jia)(jia)(jia)熱(re)(re)(re)的(de)。對(dui)強(qiang)酸、強(qiang)堿(jian)溶(rong)液,特別是對(dui)含非氧化介(jie)質(如鹽酸、稀硫酸)的(de)溶(rong)液,正確選擇電(dian)(dian)(dian)(dian)熱(re)(re)(re)管(guan)是一(yi)個(ge)十分(fen)重(zhong)要的(de)問題。發熱(re)(re)(re)管(guan)以加(jia)(jia)(jia)熱(re)(re)(re)方式分(fen)類,有電(dian)(dian)(dian)(dian)加(jia)(jia)(jia)熱(re)(re)(re)和蒸汽加(jia)(jia)(jia)熱(re)(re)(re)兩種(zhong)。電(dian)(dian)(dian)(dian)熱(re)(re)(re)管(guan)對(dui)電(dian)(dian)(dian)(dian)鍍(du)廠是一(yi)種(zhong)清潔(jie)能源(yuan),不會產生環境(jing)污染。電(dian)(dian)(dian)(dian)熱(re)(re)(re)管(guan)的(de)另一(yi)優(you)點(dian)是易于實現對(dui)溶(rong)液的(de)自動恒溫(wen)控制(zhi)。電(dian)(dian)(dian)(dian)加(jia)(jia)(jia)熱(re)(re)(re)器的(de)缺點(dian)是加(jia)(jia)(jia)熱(re)(re)(re)速度(du)較慢,電(dian)(dian)(dian)(dian)功率要求(qiu)較大。如對(dui)無保(bao)溫(wen)層的(de)溶(rong)液槽計算結果(guo)為:1000L溶(rong)液,從30℃加(jia)(jia)(jia)熱(re)(re)(re)到55℃,若需(xu)2-3h要熱(re)(re)(re)起來,電(dian)(dian)(dian)(dian)功率應達30-35kW,即(ji)使有良好(hao)保(bao)溫(wen)層,電(dian)(dian)(dian)(dian)功率也要在20kW左右為好(hao)...
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23
2018-06
計算電熱管功率需要哪些參數?
a.水槽的內空尺寸和材質(zhi);
b.液位高度,便于計算出水的體積(質(zhi)量);
c.加(jia)熱溫差(cha)(cha)(°C),即未(wei)加(jia)熱前的(de)初始溫度到所需加(jia)熱到的(de)溫度差(cha)(cha);
d.水槽(cao)或(huo)加熱容器外(wai)部是否有(you)保溫層(ceng)(mm);
e.被(bei)加熱液體的比重及密(mi)度多少。
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23
2018-06
電熱管的材質怎么選用?
a.不(bu)(bu)銹(xiu)鋼(gang)電熱管 電熱管不(bu)(bu)銹(xiu)鋼(gang)材質有(you)許多(duo)不(bu)(bu)同的牌號,比如(ru)不(bu)(bu)銹(xiu)鋼(gang)304,不(bu)(bu)銹(xiu)鋼(gang)201,不(bu)(bu)銹(xiu)鋼(gang)316L,不(bu)(bu)銹(xiu)鋼(gang)310S等,常規無堿(jian)(jian)性(xing)的水以及油加(jia)熱時用(yong)不(bu)(bu)銹(xiu)鋼(gang)304即可(ke),有(you)一些(xie)酸堿(jian)(jian)性(xing)的液體用(yong)不(bu)(bu)銹(xiu)鋼(gang)316L,但是(shi)強酸強堿(jian)(jian)不(bu)(bu)適合用(yong)不(bu)(bu)銹(xiu)鋼(gang)316L;
b.鈦(tai)電(dian)熱(re)管(guan) 鈦(tai)材質的(de)(de)電(dian)熱(re)管(guan)一般適用于鍍(du)鉻(ge)(ge)、酸銅、鍍(du)鎳、鈍化(hua)(hua)、填充、氧化(hua)(hua)槽、鉻(ge)(ge)酸陽極化(hua)(hua)、磷化(hua)(hua)酸性(xing)鍍(du)錫等工藝中,所以鈦(tai)電(dian)熱(re)管(guan)的(de)(de)價(jia)格也比較高(gao)。;
c.鐵(tie)氟(fu)(fu)龍(long)(long)電(dian)(dian)(dian)熱(re)管 鐵(tie)氟(fu)(fu)龍(long)(long)電(dian)(dian)(dian)熱(re)管又(you)叫特氟(fu)(fu)龍(long)(long)電(dian)(dian)(dian)熱(re)管,聚(ju)四氟(fu)(fu)乙(yi)烯電(dian)(dian)(dian)熱(re)管,俗稱四氟(fu)(fu)管。鐵(tie)氟(fu)(fu)龍(long)(long)電(dian)(dian)(dian)熱(re)管一般適(shi)用(yong)于(yu)強(qiang)酸強(qiang)堿等(deng)腐蝕性液體中...;
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23
2018-06
電熱管的正確使用方法
a.干燒電加熱管
包(bao)括空(kong)氣電熱管(guan)(guan)和模(mo)具電熱管(guan)(guan): 空(kong)氣電熱管(guan)(guan)在使用的(de)(de)時候(hou)一定要注意溫度控制(zhi),最好(hao)在有風循(xun)環(huan)的(de)(de)環(huan)境下使用。這樣才(cai)能保障空(kong)氣電加(jia)熱管(guan)(guan)的(de)(de)使用壽命。
b.液體電加熱管
液體電加(jia)熱(re)管(guan)的(de)正確使用(yong)方法是盡可能的(de)安裝在加(jia)熱(re)容器的(de)中底部,避免加(jia)熱(re)管(guan)的(de)加(jia)熱(re)區出現(xian)干燒情況,從而燒壞(huai)液體電加(jia)熱(re)管(guan)。
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23
2018-06
模具電熱管的設計和安裝
a.加(jia)熱(re)(re)(re)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)管(guan)(guan)(guan)(guan)徑(jing)(jing)(jing)跟模(mo)(mo)(mo)具(ju)(ju)孔(kong)的(de)(de)(de)(de)孔(kong)徑(jing)(jing)(jing)之(zhi)間(jian)(jian)存在一定(ding)聯(lian)系。因為空氣(qi)對熱(re)(re)(re)傳導(dao)是起到阻礙作用的(de)(de)(de)(de),所以模(mo)(mo)(mo)具(ju)(ju)電(dian)熱(re)(re)(re)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)設計和(he)安裝的(de)(de)(de)(de)時候要盡量減少管(guan)(guan)(guan)(guan)子外壁與模(mo)(mo)(mo)具(ju)(ju)孔(kong)孔(kong)壁之(zhi)間(jian)(jian)的(de)(de)(de)(de)距離(li)。如果(guo)他(ta)們(men)(men)(men)之(zhi)間(jian)(jian)空隙過大,加(jia)熱(re)(re)(re)管(guan)(guan)(guan)(guan)散(san)(san)熱(re)(re)(re)慢,導(dao)致加(jia)熱(re)(re)(re)管(guan)(guan)(guan)(guan)內部溫度過高而燒壞電(dian)阻絲(si),縮短電(dian)熱(re)(re)(re)管(guan)(guan)(guan)(guan)壽命。所以在給客戶(hu)(hu)模(mo)(mo)(mo)具(ju)(ju)電(dian)熱(re)(re)(re)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)設計和(he)安裝的(de)(de)(de)(de)時候,我們(men)(men)(men)會先問(wen)客戶(hu)(hu)的(de)(de)(de)(de)模(mo)(mo)(mo)具(ju)(ju)孔(kong)的(de)(de)(de)(de)大小,然后根據模(mo)(mo)(mo)具(ju)(ju)孔(kong)的(de)(de)(de)(de)孔(kong)徑(jing)(jing)(jing)來(lai)設計比模(mo)(mo)(mo)具(ju)(ju)孔(kong)小0.1-02mm的(de)(de)(de)(de)管(guan)(guan)(guan)(guan)徑(jing)(jing)(jing)的(de)(de)(de)(de)加(jia)熱(re)(re)(re)管(guan)(guan)(guan)(guan)。或者(zhe)客戶(hu)(hu)還沒有給模(mo)(mo)(mo)具(ju)(ju)打(da)孔(kong),我們(men)(men)(men)會建議他(ta)根據我們(men)(men)(men)加(jia)熱(re)(re)(re)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)徑(jing)(jing)(jing)來(lai)打(da)比我們(men)(men)(men)管(guan)(guan)(guan)(guan)徑(jing)(jing)(jing)大0.1-0.2mm的(de)(de)(de)(de)孔(kong)。這樣既保(bao)證加(jia)熱(re)(re)(re)管(guan)(guan)(guan)(guan)散(san)(san)的(de)(de)(de)(de)熱(re)(re)(re)量能(neng)被模(mo)(mo)(mo)具(ju)(ju)很快吸收,又能(neng)使得模(mo)(mo)(mo)具(ju)(ju)加(jia)熱(re)(re)(re)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)安裝以及取(qu)出方便...
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23
2018-06
電熱管的分類
a.按照出線方式分類,可(ke)以分為單頭電(dian)熱(re)管(guan)和(he)雙(shuang)頭電(dian)熱(re)管(guan);
b.按(an)照材質分類,可以分為(wei)不銹鋼電熱(re)(re)管、石(shi)英電熱(re)(re)管、鐵氟龍電熱(re)(re)管、鈦電熱(re)(re)管;
c.按照外形分類(lei),可(ke)以(yi)分為(wei)直型電(dian)(dian)熱(re)管(guan)、U型電(dian)(dian)熱(re)管(guan)、L型電(dian)(dian)熱(re)管(guan)、W型電(dian)(dian)熱(re)管(guan)、翅片電(dian)(dian)熱(re)管(guan)、異型電(dian)(dian)熱(re)管(guan);
d.按照(zhao)用途分類(lei),可(ke)以分為干(gan)燒電熱(re)管和水燒電熱(re)管;
e.按照加(jia)熱方式分類,可以分為常規電(dian)阻加(jia)熱管和輻射電(dian)熱管。
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23
2018-06
如何驗證電熱管優劣?
a.絕(jue)緣(yuan):影響電熱(re)管絕(jue)緣(yuan)的主要是發熱(re)管的封口工藝(yi);
b.泄露發(fa)流(liu):主要與(yu)電(dian)熱管(guan)使用時的(de)(de)溫度(du)、電(dian)熱管(guan)的(de)(de)使用發(fa)壓、電(dian)熱管(guan)的(de)(de)長度(du)等有關。對于高溫發(fa)熱管(guan)的(de)(de)一(yi)個(ge)重要考核指(zhi)標(biao);
c.功率(lv)準確(que)性(xing):主要與電(dian)阻(zu)絲的質(zhi)量(liang)、制造廠(chang)的工(gong)藝水(shui)平有關。在批量(liang)生產前都需要做溫度(du)系數的試驗,以確(que)定合格的功率(lv)范圍的冷態發阻(zu);
d.壽(shou)(shou)命(ming):電熱管的(de)(de)壽(shou)(shou)命(ming)除了與(yu)電阻絲質量有關外,還與(yu)氧(yang)化鎂粉的(de)(de)質量,電阻絲直徑的(de)(de)選(xuan)(xuan)擇等因素(su)有關。在選(xuan)(xuan)擇電阻絲的(de)(de)直徑時,需要計算電阻絲的(de)(de)表面負荷(he)以達到壽(shou)(shou)命(ming)要求...
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