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2011
6-27

制冷壓縮機的保養與維護
制(zhi)冷壓(ya)(ya)縮(suo)(suo)機的(de)(de)保養與維(wei)護(hu)壓(ya)(ya)縮(suo)(suo)機作(zuo)為制(zhi)冷系統(tong)的(de)(de)核心(xin)部件(北(bei)京雅士(shi)林采用(yong)(yong)原裝(zhuang)法國泰康(kang)壓(ya)(ya)縮(suo)(suo)機)，為了保證制(zhi)冷系統(tong)安全地運(yun)轉，延長壓(ya)(ya)縮(suo)(suo)機的(de)(de)使(shi)用(yong)(yong)壽命，請(qing)注意日常的(de)(de)維(wei)護(hu)保養。一、壓(ya)(ya)縮(suo)(suo)機開機前：1、檢(jian)(jian)查箱(xiang)體后部的(de)(de)制(zhi)冷劑(ji)壓(ya)(ya)力表的(de)(de)指(zhi)針讀(du)數；2、排(pai)水(shui)閥及(ji)其系統(tong)中其它閥門是否在(zai)正確位(wei)置；3、檢(jian)(jian)查電源(yuan)電壓(ya)(ya)、環境溫(wen)度是否在(zai)規(gui)定(ding)的(de)(de)范(fan)圍。二(er)、壓(ya)(ya)縮(suo)(suo)機運(yun)轉中：1、壓(ya)(ya)縮(suo)(suo)機的(de)(de)吸氣、排(pai)氣壓(ya)(ya)力不要超過使(shi)用(yong)(yong)范(fan)圍，傾聽壓(ya)(ya)縮(suo)(suo)機的(de)(de)運(yun)轉聲(sheng)音，除進、排(pai)氣閥片有(you)清晰的(de)(de)起落聲(sheng)音外，其它部件不應(ying)有(you)敲擊聲(sheng)。2、發(fa)現滲漏應(ying)及(ji)時修(xiu)理。3、壓(ya)(ya)縮(suo)(suo)...
2011
6-27

變頻器在皮帶稱重給料系統中的應用
1、工(gong)作(zuo)原理與應用(yong)封閉式稱重給(gei)料(liao)(liao)機經(jing)常(chang)用(yong)于電力或其(qi)它行業鍋爐(lu)用(yong)煤以(yi)及固(gu)體物(wu)料(liao)(liao)上料(liao)(liao)的(de)(de)計量(liang)(liang)給(gei)料(liao)(liao)。給(gei)料(liao)(liao)過(guo)(guo)程為皮(pi)(pi)帶連(lian)續給(gei)料(liao)(liao)。給(gei)料(liao)(liao)機將(jiang)來自(zi)于給(gei)料(liao)(liao)倉或其(qi)它給(gei)料(liao)(liao)設備的(de)(de)物(wu)料(liao)(liao)輸(shu)送(song)并通(tong)過(guo)(guo)稱重橋(qiao)架進(jin)(jin)行重量(liang)(liang)檢測(ce)(ce);同時(shi)裝于尾輪的(de)(de)測(ce)(ce)速(su)(su)傳感器(qi)對皮(pi)(pi)帶進(jin)(jin)行速(su)(su)度檢測(ce)(ce);被檢測(ce)(ce)的(de)(de)重量(liang)(liang)信號(hao)及速(su)(su)度信號(hao)一同送(song)入(ru)6150B積(ji)算器(qi)進(jin)(jin)行微積(ji)分處理并顯(xian)示以(yi)t/h為單(dan)位(wei)(wei)的(de)(de)瞬時(shi)流(liu)量(liang)(liang)及噸為單(dan)位(wei)(wei)的(de)(de)累計量(liang)(liang)。其(qi)內部調節器(qi)將(jiang)實(shi)測(ce)(ce)的(de)(de)瞬時(shi)流(liu)量(liang)(liang)信號(hao)值與經(jing)過(guo)(guo)通(tong)訊板來自(zi)于(工(gong)控機)DCS的(de)(de)設定流(liu)量(liang)(liang)值進(jin)(jin)行比較，并根(gen)據(ju)偏(pian)離大小(xiao)輸(shu)出(chu)相應的(de)(de)信號(hao)值，通(tong)過(guo)(guo)變頻器(qi)改...
2011
6-27

普傳變頻器在鍋爐綜合節能上的應用
一、前(qian)言鍋爐節能降耗(hao)主要的(de)控(kong)(kong)制(zhi)(zhi)指標在於煤耗(hao)及(ji)(ji)用電(dian)效(xiao)率(lv)(lv)，傳統(tong)方法多(duo)用風門檔板(ban)、閥門和機械調速(su)來控(kong)(kong)制(zhi)(zhi)鼓(gu)(引)風機、給(gei)水(shui)泵(beng)、循環(huan)泵(beng)的(de)流量及(ji)(ji)爐排(pai)的(de)運行速(su)度(du)，其(qi)設計上并(bing)未考慮(lv)節能目的(de)，同時，工藝及(ji)(ji)生產(chan)任務的(de)不同，蒸汽需求(qiu)量變化時，需改變給(gei)煤(噴降)量，以達到(dao)率(lv)(lv)燃燒，傳統(tong)的(de)控(kong)(kong)制(zhi)(zhi)方式采用人工操(cao)作、耗(hao)電(dian)高、控(kong)(kong)制(zhi)(zhi)精度(du)低，且(qie)易(yi)因(yin)操(cao)作不當而(er)產(chan)生環(huan)境(jing)污染(ran)(煙囪冒黑(hei)煙)。二、鍋爐供水(shui)控(kong)(kong)制(zhi)(zhi)系統(tong)的(de)改造(zao)水(shui)泵(beng)的(de)工作原(yuan)理(li)(li)由(you)水(shui)泵(beng)的(de)工作原(yuan)理(li)(li)可知流量Q與(yu)轉速(su)N成正比(bi)，揚(yang)程H與(yu)轉速(su)N的(de)平方成正比(bi)，軸(zhou)功率(lv)(lv)P與(yu)轉速(su)N三次方...
2011
6-13

酸度計溫度補償作用及PH電校正方法
酸度(du)(du)(du)(du)計(ji)的(de)(de)(de)溫(wen)度(du)(du)(du)(du)補(bu)(bu)償作(zuo)用酸度(du)(du)(du)(du)計(ji)的(de)(de)(de)溫(wen)度(du)(du)(du)(du)補(bu)(bu)償應包(bao)(bao)含三部分(fen)(fen)：電(dian)(dian)(dian)(dian)斜(xie)率的(de)(de)(de)溫(wen)度(du)(du)(du)(du)補(bu)(bu)償、電(dian)(dian)(dian)(dian)零點(包(bao)(bao)括測(ce)(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)和參比電(dian)(dian)(dian)(dian))的(de)(de)(de)溫(wen)度(du)(du)(du)(du)補(bu)(bu)償。而(er)酸度(du)(du)(du)(du)計(ji)上(shang)設置的(de)(de)(de)溫(wen)度(du)(du)(du)(du)補(bu)(bu)償，只是補(bu)(bu)償電(dian)(dian)(dian)(dian)的(de)(de)(de)斜(xie)率項(2.303RT/F)。因此(ci)，溫(wen)度(du)(du)(du)(du)補(bu)(bu)償對(dui)酸度(du)(du)(du)(du)計(ji)測(ce)(ce)量(liang)(liang)并不(bu)是很(hen)充分(fen)(fen)的(de)(de)(de)，也不(bu)能消除(chu)由溫(wen)度(du)(du)(du)(du)引(yin)(yin)起(qi)的(de)(de)(de)誤(wu)(wu)差。只是由于(yu)溶液的(de)(de)(de)溫(wen)度(du)(du)(du)(du)項和電(dian)(dian)(dian)(dian)零點溫(wen)度(du)(du)(du)(du)項，一是無法確定，二是引(yin)(yin)起(qi)的(de)(de)(de)誤(wu)(wu)差很(hen)小(xiao)，故略去不(bu)計(ji).PH電(dian)(dian)(dian)(dian)校正(zheng)常(chang)識PH電(dian)(dian)(dian)(dian)使(shi)用一段(duan)時間后，不(bu)對(dui)稱電(dian)(dian)(dian)(dian)位將會發(fa)生很(hen)大改變，故必(bi)須定期校準。酸度(du)(du)(du)(du)計(ji)電(dian)(dian)(dian)(dian)標定校準的(de)(de)(de)次數(shu)取(qu)決于(yu)試樣，電(dian)(dian)(dian)(dian)性能及(ji)對(dui)測(ce)(ce)量(liang)(liang)的(de)(de)(de)度(du)(du)(du)(du)要求。高(gao)精度(du)(du)(du)(du)測(ce)(ce)量(liang)(liang)(≤...
2011
6-13

常用PH計正確使用與維護
酸度計(ji)簡稱(cheng)pH計(ji)，由電(dian)(dian)和電(dian)(dian)計(ji)兩部分組成。使(shi)(shi)用(yong)(yong)中若(ruo)能夠合(he)理維護電(dian)(dian)、按要求(qiu)配(pei)制標(biao)準緩沖液和正確(que)操作(zuo)電(dian)(dian)計(ji),可大(da)大(da)減小pH示值誤差，從而(er)提高(gao)化學實驗、醫學檢驗數據的性(xing)(xing)。一、正確(que)使(shi)(shi)用(yong)(yong)與保養電(dian)(dian)目(mu)前實驗室(shi)使(shi)(shi)用(yong)(yong)的電(dian)(dian)都是(shi)復合(he)電(dian)(dian)，其優點是(shi)使(shi)(shi)用(yong)(yong)方便，不受氧化性(xing)(xing)或(huo)還原性(xing)(xing)物質的影響，且平衡速度較快。使(shi)(shi)用(yong)(yong)時(shi)，將電(dian)(dian)加(jia)液口(kou)上所套的橡(xiang)膠(jiao)套和下端的橡(xiang)皮套全取下，以保持電(dian)(dian)內氯化鉀溶液的液壓差。下面就把(ba)電(dian)(dian)的使(shi)(shi)用(yong)(yong)與維護簡單作(zuo)一介紹：⒈復合(he)電(dian)(dian)不用(yong)(yong)時(shi)，可充分浸泡3M氯化鉀溶液中。切忌用(yong)(yong)洗(xi)滌液或(huo)其他吸水性(xing)(xing)試劑浸洗(xi)。⒉使(shi)(shi)用(yong)(yong)前...
2011
2-16

雙層玻璃反應釜的安裝步驟
雙層玻璃反(fan)應釜(fu)的(de)(de)安(an)裝步驟：1、打開包裝后，按(an)照裝箱清單檢查(cha)本機的(de)(de)主(zhu)要配(pei)件是否齊全(quan)。2、將不銹鋼管與(yu)固(gu)定(ding)件按(an)照附圖所示組裝框架(jia)。3、將電氣箱安(an)裝在右后立桿(gan)頂端(duan)并旋緊螺釘，插上(shang)七芯插頭，真空表(biao)安(an)裝在后端(duan)，擰緊螺釘即可。4、根(gen)據使用高(gao)度，將釜(fu)圓形托(tuo)架(jia)固(gu)定(ding)在立桿(gan)滑塊上(shang)，釜(fu)放在托(tuo)架(jia)上(shang)，半圓型抱箍用于固(gu)定(ding)釜(fu)頸(jing)部(bu)，分別插入立桿(gan)滑塊，合攏后擰緊固(gu)定(ding)螺絲，安(an)裝時(shi)注意(yi)反(fan)應釜(fu)主(zhu)體垂直。5、攪(jiao)拌棒固(gu)定(ding)在電機主(zhu)軸的(de)(de)齒環夾頭上(shang)，攪(jiao)拌棒穿過蓋中間旋轉軸承，擰緊連(lian)接(jie)器(qi)，然(ran)后調整電機的(de)(de)位置，注意(yi)垂直同(tong)心度。6...
2011
2-16

反應釜使用注意事項及常見故障分析
反(fan)應(ying)(ying)釜使(shi)(shi)用注(zhu)意事(shi)項：1、應(ying)(ying)嚴(yan)格(ge)按產品銘牌(pai)上標定(ding)的(de)工(gong)作(zuo)(zuo)(zuo)壓力和工(gong)作(zuo)(zuo)(zuo)溫度操(cao)(cao)作(zuo)(zuo)(zuo)使(shi)(shi)用，以(yi)(yi)免(mian)造成危險。2、嚴(yan)格(ge)遵守產品使(shi)(shi)用說明書中關于(yu)冷卻(que)、注(zhu)油等方面(mian)(mian)的(de)規(gui)定(ding)，做好設備(bei)的(de)維護和保(bao)養(yang)。3、所有閥門使(shi)(shi)用時，應(ying)(ying)緩(huan)慢轉動閥桿(gan)(針)，壓緊(jin)密封(feng)面(mian)(mian)，達(da)到(dao)密封(feng)效(xiao)果。關閉時不易用力過猛，以(yi)(yi)免(mian)損壞密封(feng)面(mian)(mian)。4、電(dian)氣控制儀表(biao)應(ying)(ying)由(you)專人(ren)操(cao)(cao)作(zuo)(zuo)(zuo)，并按規(gui)定(ding)設置(zhi)過載保(bao)護設施。反(fan)應(ying)(ying)釜常見故障(zhang)現象(xiang)及原(yuan)因：1、故障(zhang)現象(xiang)：密封(feng)面(mian)(mian)處(chu)出現泄漏(lou)。故障(zhang)原(yuan)因：螺(luo)桿(gan)螺(luo)紋松動；密封(feng)面(mian)(mian)損傷。排(pai)除方法：將螺(luo)桿(gan)重(zhong)新(xin)上緊(jin)；重(zhong)新(xin)修磨拋(pao)光密封(feng)面(mian)(mian)。2、故障(zhang)現象(xiang)...
2011
2-16

低溫冷卻液循環泵的用途和特點
DLSB系(xi)列低溫(wen)(wen)(wen)(wen)冷(leng)(leng)卻液循環(huan)泵采用(yong)風冷(leng)(leng)式(shi)全(quan)封(feng)閉(bi)壓縮機(ji)組(zu)制(zhi)冷(leng)(leng)及微機(ji)智能控制(zhi)系(xi)統(tong)，提供低溫(wen)(wen)(wen)(wen)冷(leng)(leng)卻水(液)流(liu)(liu)或(huo)(huo)低溫(wen)(wen)(wen)(wen)恒(heng)溫(wen)(wen)(wen)(wen)水(液)流(liu)(liu)，以滿足用(yong)冷(leng)(leng)卻水及低溫(wen)(wen)(wen)(wen)液體去降溫(wen)(wen)(wen)(wen)或(huo)(huo)恒(heng)溫(wen)(wen)(wen)(wen)儀(yi)器(qi)，如旋轉(zhuan)蒸發器(qi)、電子(zi)顯(xian)微鏡(jing)、低溫(wen)(wen)(wen)(wen)化學反(fan)應釜、電子(zi)能譜儀(yi)、密度儀(yi)、冷(leng)(leng)凍干燥儀(yi)、反(fan)應釜等，也(ye)可(ke)把多種溶劑直接在槽內低溫(wen)(wen)(wen)(wen)恒(heng)溫(wen)(wen)(wen)(wen)實(shi)(shi)驗(yan)(yan)。產品(pin)特點(dian)：1、風冷(leng)(leng)式(shi)全(quan)封(feng)閉(bi)壓縮機(ji)組(zu)制(zhi)冷(leng)(leng)，微機(ji)智能制(zhi)冷(leng)(leng)控制(zhi)系(xi)統(tong)自(zi)動開啟，制(zhi)冷(leng)(leng)系(xi)統(tong)具有延時、過(guo)熱、過(guo)電流(liu)(liu)等多重(zhong)保護(hu)裝置。2、循環(huan)泵可(ke)將(jiang)槽內冷(leng)(leng)液輸出，冷(leng)(leng)卻或(huo)(huo)恒(heng)溫(wen)(wen)(wen)(wen)機(ji)外實(shi)(shi)驗(yan)(yan)容器(qi)或(huo)(huo)建立(li)第(di)二(er)恒(heng)溫(wen)(wen)(wen)(wen)場。3、微機(ji)設有...
2011
2-10

溫控儀簡單故障診斷
溫(wen)(wen)(wen)(wen)控(kong)(kong)儀(yi)是(shi)調(diao)控(kong)(kong)一(yi)(yi)(yi)體(ti)(ti)化智能溫(wen)(wen)(wen)(wen)度(du)控(kong)(kong)制(zhi)儀(yi)表(biao)(biao)(biao)，它(ta)采用了全數字化集(ji)成設計，具有溫(wen)(wen)(wen)(wen)度(du)曲線可(ke)編程(cheng)或定點恒溫(wen)(wen)(wen)(wen)控(kong)(kong)制(zhi)、多重(zhong)PID調(diao)節(jie)、輸(shu)出功(gong)(gong)率限幅曲線編程(cheng)、手(shou)動(dong)/自動(dong)切換、軟啟動(dong)、報(bao)警開關量輸(shu)出、實時數據查詢、與計算機通訊等功(gong)(gong)能，將數顯溫(wen)(wen)(wen)(wen)度(du)儀(yi)表(biao)(biao)(biao)和(he)ZK晶(jing)閘(zha)(zha)管電壓調(diao)整器合二為一(yi)(yi)(yi)，集(ji)溫(wen)(wen)(wen)(wen)度(du)測量、調(diao)節(jie)、驅動(dong)于一(yi)(yi)(yi)體(ti)(ti)，儀(yi)表(biao)(biao)(biao)直接輸(shu)出晶(jing)閘(zha)(zha)管觸發信號，可(ke)驅動(dong)各類晶(jing)閘(zha)(zha)管負載。溫(wen)(wen)(wen)(wen)控(kong)(kong)儀(yi)遇到故障(zhang)的(de)簡單診(zhen)斷(duan)：1、溫(wen)(wen)(wen)(wen)控(kong)(kong)儀(yi)發生(sheng)故障(zhang)時，在進行故障(zhang)判斷(duan)前我們(men)要先注意一(yi)(yi)(yi)個問題(ti)，即系統內采用的(de)溫(wen)(wen)(wen)(wen)控(kong)(kong)儀(yi)是(shi)否多采用電動(dong)儀(yi)表(biao)(biao)(biao)測量、指示和(he)控(kong)(kong)制(zhi)儀(yi)，如...

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