聯系電話：13917768445
聯系電話：13917768445
水(shui)(shui)泵是(shi)農村灌溉和排澇(lao)的(de)重要(yao)機械。但由于(yu)農村的(de)電(dian)力設(she)施簡陋、水(shui)(shui)泵的(de)工作環境較差,極(ji)易(yi)發(fa)生燒毀電(dian)機事故,實(shi)踐(jian)證(zheng)明,通(tong)過使用自(zi)行設(she)計的(de)小型電(dian)器裝盆,對電(dian)機和水(shui)(shui)泵可起到安全(quan)保護作用。現將該裝里的(de)主要(yao)性能、結構原理及注(zhu)意事項介紹如下：
一、主要性能
1.可防止電機單相(xiang)運行。如刀閘保險絲一相(xiang)熔斷(duan)引起(qi)的(de)斷(duan)相(xiang),接觸器(qi)主觸頭接觸不好引起(qi)的(de)斷(duan)相(xiang),電機電源線(xian)內部斷(duan)路引起(qi)的(de)斷(duan)相(xiang),電機接線(xian)盒接觸不良引起(qi)的(de)斷(duan)相(xiang)等。
2.可防止水泵空轉.
二、主要結構與工作原理
1.主(zhu)要結(jie)構(見圖l)。該設(she)備由接觸器JC、起動(dong)按鈕QA、停止按鈕TA、互感器LM、電子電路E、出(chu)水檢測探頭等組(zu)成.,
2.工作(zuo)原理。合上閘刀開關DK,按(an)動起動按(an)鈕QA,文(wen)流接(jie)(jie)(jie)(jie)(jie)觸(chu)器(qi)線(xian)圈JC的(de)(de)一端(duan)(duan)接(jie)(jie)(jie)(jie)(jie)電(dian)(dian)(dian)(dian)該的(de)(de)C相,另(ling)一端(duan)(duan)經按(an)鈕QA、TA與電(dian)(dian)(dian)(dian)稼A相構(gou)成回(hui)路.‘線(xian)圈Jc得(de)電(dian)(dian)(dian)(dian),接(jie)(jie)(jie)(jie)(jie)觸(chu)器(qi)吸合,電(dian)(dian)(dian)(dian)機(ji)M得(de)電(dian)(dian)(dian)(dian)、運轉。同時(shi)(shi)由于電(dian)(dian)(dian)(dian)機(ji)電(dian)(dian)(dian)(dian)該線(xian)中有電(dian)(dian)(dian)(dian)流通過,在三個(ge)互感器(qi)LH中同時(shi)(shi)感應(ying)出(chu)電(dian)(dian)(dian)(dian)壓(ya),此(ci)(ci)電(dian)(dian)(dian)(dian)壓(ya)按(an)圖(tu)示接(jie)(jie)(jie)(jie)(jie)法進行矢t相加,對外(wai)輸出(chu)。該電(dian)(dian)(dian)(dian)壓(ya)經D整(zheng)流、C:祥(xiang)波(bo)作(zuo)為電(dian)(dian)(dian)(dian)子(zi)電(dian)(dian)(dian)(dian)路的(de)(de)電(dian)(dian)(dian)(dian)派(pai)。此(ci)(ci)刻電(dian)(dian)(dian)(dian)容Ct兩(liang)端(duan)(duan)電(dian)(dian)(dian)(dian)壓(ya)以(yi)零開始由電(dian)(dian)(dian)(dian)抓經Rt充電(dian)(dian)(dian)(dian),并按(an)指數規律上升,在未(wei)達到BG,的(de)(de)BE結(jie)導通電(dian)(dian)(dian)(dian)壓(ya)時(shi)(shi)舊G,截止,BG:導通,繼電(dian)(dian)(dian)(dian)器(qi)J得(de)電(dian)(dian)(dian)(dian)吸.合,其觸(chu)點并接(jie)(jie)(jie)(jie)(jie)于QA,此(ci)(ci)時(shi)(shi)即使QA斷(duan)開也會由J的(de)(de)作(zuo)用產(chan)生自保,使接(jie)(jie)(jie)(jie)(jie)觸(chu)器(qi)線(xian)圈JC繼續得(de)電(dian)(dian)(dian)(dian),電(dian)(dian)(dian)(dian)機(ji)維(wei)續旋(xuan)轉。
隨著電(dian)(dian)機的(de)不(bu)斷(duan)旋轉,ct兩(liang)(liang)端電(dian)(dian)壓(ya)(ya)不(bu)斷(duan)提高(gao),當(dang)達到(dao)BG:的(de)導(dao)(dao)通電(dian)(dian)壓(ya)(ya)時出G:導(dao)(dao)通、BG:截止(zhi),繼(ji)電(dian)(dian)器J釋放,接觸器線圈(quan)Jc失電(dian)(dian).電(dian)(dian)機停(ting)轉,如果在(zai)兩(liang)(liang)端電(dian)(dian)壓(ya)(ya)未達到(dao)BG:導(dao)(dao)通之(zhi)前(qian),水(shui)(shui)泵(beng)出水(shui)(shui)管的(de)水(shui)(shui)流沖擊“出水(shui)(shui)檢側探頭.,由于(yu)水(shui)(shui)的(de)導(dao)(dao)電(dian)(dian)作(zuo)用,Ct兩(liang)(liang)端的(de)電(dian)(dian)壓(ya)(ya)不(bu)再(zai)上升,使(shi)決哈:不(bu)能(neng)導(dao)(dao)通,繼(ji)電(dian)(dian)器J保持(chi)吸合,水(shui)(shui)泵(beng)即可繼(ji)續工作(zuo)一且在(zai)規定(ding)時間(2~3分(fen)鐘)抽(chou)不(bu)上水(shui)(shui),電(dian)(dian)機自動停(ting)轉。
當(dang)出現(xian)斷相時,三個互感器只(zhi)有(you)兩個能感應出電(dian)(dian)(dian)(dian)壓,此(ci)電(dian)(dian)(dian)(dian)壓按田(tian)示(shi)接法進行矢(shi)t相加,互相抵消,電(dian)(dian)(dian)(dian)子電(dian)(dian)(dian)(dian)路失(shi)去電(dian)(dian)(dian)(dian)該,導致繼電(dian)(dian)(dian)(dian)器失(shi)電(dian)(dian)(dian)(dian),觸點釋放,電(dian)(dian)(dian)(dian)機停(ting)(ting)轉。在正(zheng)常運轉時,如果想停(ting)(ting)止運行.可按停(ting)(ting)止按鈕TA,出現(xian)故雌時,按起動按鈕QA可強行運轉,但停(ting)(ting)止按動電(dian)(dian)(dian)(dian)機立即停(ting)(ting)止轉動,不會產生.自俄現(xian)象”,有(you)效地保護了(le)電(dian)(dian)(dian)(dian)機。
三、注意事項
1.出水(shui)檢側探頭可(ke)(ke)自(zi)制(如圖2),安裝在出水(shui)口水(shui)能澆(jiao)到的地方(fang)即(ji)可(ke)(ke)。
2.互感器(qi)LH可用漆包線穿(chuan)繞(rao)在徽環上,三個互感器(qi)要一致。
四、主要特點
1.結構簡(jian)單,操作方便.
2.造價低,整個設備投(tou)資幾十(shi)元(yuan)即可。
3.工作性(xing)能可攀,經(jing)久附用。
