產品介紹西門子SIEMENS電氣閥門定位器

產品作用:

電氣閥門定(ding)位(wei)(wei)(wei)器(qi)(qi)是(shi)控制閥的(de)(de)(de)主要附(fu)件.它將(jiang)閥桿(gan)(gan)位(wei)(wei)(wei)移(yi)(yi)信(xin)(xin)(xin)號(hao)作為輸入(ru)的(de)(de)(de)反饋測量(liang)信(xin)(xin)(xin)號(hao),以(yi)控制器(qi)(qi)輸出(chu)信(xin)(xin)(xin)號(hao)作為設(she)定(ding)信(xin)(xin)(xin)號(hao)，進行(xing)比較(jiao)，當兩者有偏(pian)差時，改(gai)變其(qi)到執行(xing)機(ji)構(gou)的(de)(de)(de)輸出(chu)信(xin)(xin)(xin)號(hao)，使(shi)執行(xing)機(ji)構(gou)動作，建立了閥桿(gan)(gan)位(wei)(wei)(wei)移(yi)(yi)倍與控制器(qi)(qi)輸出(chu)信(xin)(xin)(xin)號(hao)之間的(de)(de)(de)一(yi)(yi)一(yi)(yi)對應關系(xi)(xi)。因此(ci)，閥門定(ding)位(wei)(wei)(wei)器(qi)(qi)組成以(yi)閥桿(gan)(gan)位(wei)(wei)(wei)移(yi)(yi)為測量(liang)信(xin)(xin)(xin)號(hao)，以(yi)控制器(qi)(qi)輸出(chu)為設(she)定(ding)信(xin)(xin)(xin)號(hao)的(de)(de)(de)反饋控制系(xi)(xi)統。該控制系(xi)(xi)統的(de)(de)(de)操縱變量(liang)是(shi)閥門定(ding)位(wei)(wei)(wei)器(qi)(qi)去執行(xing)機(ji)構(gou)的(de)(de)(de)輸出(chu)信(xin)(xin)(xin)號(hao)。

閥(fa)門(men)(men)定(ding)位(wei)(wei)(wei)器(qi)(qi)(qi)按輸(shu)(shu)入信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)分為氣(qi)(qi)(qi)動(dong)閥(fa)門(men)(men)定(ding)位(wei)(wei)(wei)器(qi)(qi)(qi)、電(dian)(dian)(dian)(dian)氣(qi)(qi)(qi)閥(fa)門(men)(men)定(ding)位(wei)(wei)(wei)器(qi)(qi)(qi)和智(zhi)(zhi)能閥(fa)門(men)(men)定(ding)位(wei)(wei)(wei)器(qi)(qi)(qi)。氣(qi)(qi)(qi)動(dong)閥(fa)門(men)(men)定(ding)位(wei)(wei)(wei)器(qi)(qi)(qi)的(de)(de)(de)(de)輸(shu)(shu)入信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)是標準(zhun)氣(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)，例如，20~100kPa氣(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)，其(qi)輸(shu)(shu)出(chu)(chu)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)也是標準(zhun)的(de)(de)(de)(de)氣(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)。電(dian)(dian)(dian)(dian)氣(qi)(qi)(qi)閥(fa)門(men)(men)定(ding)位(wei)(wei)(wei)器(qi)(qi)(qi)的(de)(de)(de)(de)輸(shu)(shu)入信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)是標準(zhun)電(dian)(dian)(dian)(dian)流或電(dian)(dian)(dian)(dian)壓(ya)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)，例如，4~20mA電(dian)(dian)(dian)(dian)流信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)或1~5V電(dian)(dian)(dian)(dian)壓(ya)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)等，在(zai)電(dian)(dian)(dian)(dian)氣(qi)(qi)(qi)閥(fa)門(men)(men)定(ding)位(wei)(wei)(wei)器(qi)(qi)(qi)內部將(jiang)電(dian)(dian)(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)轉(zhuan)換(huan)為電(dian)(dian)(dian)(dian)磁力，然(ran)后輸(shu)(shu)出(chu)(chu)氣(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)到撥動(dong)控制(zhi)閥(fa)。智(zhi)(zhi)能電(dian)(dian)(dian)(dian)氣(qi)(qi)(qi)閥(fa)門(men)(men)定(ding)位(wei)(wei)(wei)器(qi)(qi)(qi)它將(jiang)控制(zhi)室輸(shu)(shu)出(chu)(chu)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)轉(zhuan)換(huan)成(cheng)驅動(dong)調節(jie)閥(fa)的(de)(de)(de)(de)氣(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)，根據調節(jie)閥(fa)工作時閥(fa)桿摩擦力，抵消介質壓(ya)力波(bo)動(dong)而產(chan)生的(de)(de)(de)(de)不(bu)平(ping)衡力，使閥(fa)門(men)(men)開度對應(ying)于控制(zhi)室輸(shu)(shu)出(chu)(chu)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)。并且可以進行智(zhi)(zhi)能組態設(she)置(zhi)相應(ying)的(de)(de)(de)(de)參數，達到改善控制(zhi)閥(fa)性(xing)能的(de)(de)(de)(de)目的(de)(de)(de)(de)。

按閥門定(ding)位(wei)器(qi)輸(shu)出(chu)和輸(shu)入信(xin)(xin)號(hao)(hao)的增(zeng)益符號(hao)(hao)分為(wei)正作用閥門定(ding)位(wei)器(qi)和反作用閥門定(ding)位(wei)器(qi)。正作用閥門定(ding)位(wei)器(qi)的輸(shu)入信(xin)(xin)號(hao)(hao)增(zeng)加(jia)時，輸(shu)出(chu)信(xin)(xin)號(hao)(hao)也增(zeng)加(jia)，因(yin)此，增(zeng)益為(wei)正。反作用閥門定(ding)位(wei)器(qi)的輸(shu)入信(xin)(xin)號(hao)(hao)增(zeng)加(jia)時，輸(shu)出(chu)信(xin)(xin)號(hao)(hao)減小，因(yin)此，增(zeng)益為(wei)負。

按(an)閥門定位(wei)器(qi)是否帶(dai)CPU可分(fen)為普通(tong)電(dian)(dian)(dian)氣閥門定位(wei)器(qi)和智能(neng)(neng)電(dian)(dian)(dian)氣閥門定位(wei)器(qi)。普通(tong)電(dian)(dian)(dian)氣閥門定位(wei)器(qi)沒有CPU，因(yin)此，不具有智能(neng)(neng)，不能(neng)(neng)處理有關(guan)的智能(neng)(neng)運算(suan)。智能(neng)(neng)電(dian)(dian)(dian)氣閥門定位(wei)器(qi)帶(dai)CPU，可處理有關(guan)智能(neng)(neng)運算(suan)，例如，可進行(xing)前向(xiang)通(tong)道的非線性補償等，現場總線電(dian)(dian)(dian)氣閥門定位(wei)器(qi)還可帶(dai)PID等功能(neng)(neng)模塊，實現相應(ying)的運算(suan)。 按(an)反饋信號(hao)的檢測(ce)方法也可進行(xing)分(fen)類(lei)。

按閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)輸入(ru)信(xin)(xin)號(hao)(hao)(hao)是(shi)模(mo)擬(ni)信(xin)(xin)號(hao)(hao)(hao)或數字信(xin)(xin)號(hao)(hao)(hao)，可分為(wei)普通(tong)閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)和現場(chang)總線(xian)電(dian)氣閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)。普通(tong)閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)的(de)輸入(ru)信(xin)(xin)號(hao)(hao)(hao)是(shi)模(mo)擬(ni)氣壓(ya)或電(dian)流、電(dian)壓(ya)信(xin)(xin)號(hao)(hao)(hao)，現場(chang)總線(xian)電(dian)氣閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)的(de)輸入(ru)信(xin)(xin)號(hao)(hao)(hao)是(shi)現場(chang)總線(xian)的(de)數字信(xin)(xin)號(hao)(hao)(hao)。

按(an)動作的方向可分為單(dan)向閥門(men)(men)(men)定(ding)(ding)位(wei)(wei)器和(he)雙向閥門(men)(men)(men)定(ding)(ding)位(wei)(wei)器。單(dan)向閥門(men)(men)(men)定(ding)(ding)位(wei)(wei)器用(yong)于活塞(sai)式(shi)執行(xing)機(ji)構(gou)(gou)時，閥門(men)(men)(men)定(ding)(ding)位(wei)(wei)器只(zhi)有一個方向起作用(yong)，雙向閥門(men)(men)(men)定(ding)(ding)位(wei)(wei)器作用(yong)在(zai)活塞(sai)式(shi)執行(xing)機(ji)構(gou)(gou)氣缸(gang)的兩(liang)側，在(zai)兩(liang)個方向起作用(yong)。

產品介紹西門子SIEMENS電氣閥門定位器