產品介紹西門子SIEMENS電氣閥門定位器

產品作用:

電氣(qi)閥(fa)(fa)門(men)定位(wei)(wei)器是控(kong)制(zhi)閥(fa)(fa)的(de)(de)主要附件(jian).它(ta)將閥(fa)(fa)桿位(wei)(wei)移(yi)信號(hao)(hao)作(zuo)為輸(shu)入的(de)(de)反饋測量(liang)信號(hao)(hao),以控(kong)制(zhi)器輸(shu)出(chu)信號(hao)(hao)作(zuo)為設定信號(hao)(hao)，進行(xing)比較，當(dang)兩者有偏(pian)差時(shi)，改變其到執(zhi)(zhi)行(xing)機(ji)構的(de)(de)輸(shu)出(chu)信號(hao)(hao)，使執(zhi)(zhi)行(xing)機(ji)構動作(zuo)，建(jian)立了閥(fa)(fa)桿位(wei)(wei)移(yi)倍與控(kong)制(zhi)器輸(shu)出(chu)信號(hao)(hao)之間的(de)(de)一(yi)一(yi)對(dui)應關系。因此，閥(fa)(fa)門(men)定位(wei)(wei)器組成(cheng)以閥(fa)(fa)桿位(wei)(wei)移(yi)為測量(liang)信號(hao)(hao)，以控(kong)制(zhi)器輸(shu)出(chu)為設定信號(hao)(hao)的(de)(de)反饋控(kong)制(zhi)系統。該控(kong)制(zhi)系統的(de)(de)操縱變量(liang)是閥(fa)(fa)門(men)定位(wei)(wei)器去執(zhi)(zhi)行(xing)機(ji)構的(de)(de)輸(shu)出(chu)信號(hao)(hao)。

閥(fa)(fa)(fa)(fa)門(men)(men)定位(wei)器(qi)(qi)按(an)輸入(ru)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)分為氣(qi)動(dong)(dong)閥(fa)(fa)(fa)(fa)門(men)(men)定位(wei)器(qi)(qi)、電(dian)(dian)(dian)(dian)氣(qi)閥(fa)(fa)(fa)(fa)門(men)(men)定位(wei)器(qi)(qi)和智能閥(fa)(fa)(fa)(fa)門(men)(men)定位(wei)器(qi)(qi)。氣(qi)動(dong)(dong)閥(fa)(fa)(fa)(fa)門(men)(men)定位(wei)器(qi)(qi)的輸入(ru)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)是標(biao)(biao)準(zhun)氣(qi)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)，例如(ru)，20~100kPa氣(qi)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)，其輸出(chu)(chu)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)也是標(biao)(biao)準(zhun)的氣(qi)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)。電(dian)(dian)(dian)(dian)氣(qi)閥(fa)(fa)(fa)(fa)門(men)(men)定位(wei)器(qi)(qi)的輸入(ru)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)是標(biao)(biao)準(zhun)電(dian)(dian)(dian)(dian)流(liu)或電(dian)(dian)(dian)(dian)壓信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)，例如(ru)，4~20mA電(dian)(dian)(dian)(dian)流(liu)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)或1~5V電(dian)(dian)(dian)(dian)壓信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)等(deng)，在電(dian)(dian)(dian)(dian)氣(qi)閥(fa)(fa)(fa)(fa)門(men)(men)定位(wei)器(qi)(qi)內部(bu)將(jiang)電(dian)(dian)(dian)(dian)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)轉換為電(dian)(dian)(dian)(dian)磁力(li)(li)，然后輸出(chu)(chu)氣(qi)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)到撥(bo)動(dong)(dong)控制(zhi)閥(fa)(fa)(fa)(fa)。智能電(dian)(dian)(dian)(dian)氣(qi)閥(fa)(fa)(fa)(fa)門(men)(men)定位(wei)器(qi)(qi)它將(jiang)控制(zhi)室輸出(chu)(chu)的電(dian)(dian)(dian)(dian)流(liu)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)轉換成驅動(dong)(dong)調(diao)節閥(fa)(fa)(fa)(fa)的氣(qi)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)，根據調(diao)節閥(fa)(fa)(fa)(fa)工作時(shi)閥(fa)(fa)(fa)(fa)桿摩擦力(li)(li)，抵(di)消介質壓力(li)(li)波(bo)動(dong)(dong)而(er)產生的不平衡(heng)力(li)(li)，使閥(fa)(fa)(fa)(fa)門(men)(men)開度(du)對應于控制(zhi)室輸出(chu)(chu)的電(dian)(dian)(dian)(dian)流(liu)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)。并且可以進行智能組態設(she)置(zhi)相應的參(can)數(shu)，達到改善(shan)控制(zhi)閥(fa)(fa)(fa)(fa)性能的目(mu)的。

按(an)閥門(men)(men)(men)定(ding)位(wei)器(qi)輸(shu)出和(he)輸(shu)入(ru)信號(hao)(hao)的(de)(de)增(zeng)益(yi)符(fu)號(hao)(hao)分為(wei)(wei)正(zheng)作用閥門(men)(men)(men)定(ding)位(wei)器(qi)和(he)反(fan)作用閥門(men)(men)(men)定(ding)位(wei)器(qi)。正(zheng)作用閥門(men)(men)(men)定(ding)位(wei)器(qi)的(de)(de)輸(shu)入(ru)信號(hao)(hao)增(zeng)加時，輸(shu)出信號(hao)(hao)也增(zeng)加，因(yin)此，增(zeng)益(yi)為(wei)(wei)正(zheng)。反(fan)作用閥門(men)(men)(men)定(ding)位(wei)器(qi)的(de)(de)輸(shu)入(ru)信號(hao)(hao)增(zeng)加時，輸(shu)出信號(hao)(hao)減(jian)小，因(yin)此，增(zeng)益(yi)為(wei)(wei)負(fu)。

按閥(fa)門(men)定(ding)(ding)(ding)位(wei)器(qi)(qi)(qi)(qi)是否(fou)帶(dai)(dai)CPU可(ke)(ke)分為(wei)普(pu)通(tong)(tong)電(dian)氣閥(fa)門(men)定(ding)(ding)(ding)位(wei)器(qi)(qi)(qi)(qi)和智(zhi)能(neng)(neng)(neng)(neng)(neng)電(dian)氣閥(fa)門(men)定(ding)(ding)(ding)位(wei)器(qi)(qi)(qi)(qi)。普(pu)通(tong)(tong)電(dian)氣閥(fa)門(men)定(ding)(ding)(ding)位(wei)器(qi)(qi)(qi)(qi)沒有CPU，因此，不具有智(zhi)能(neng)(neng)(neng)(neng)(neng)，不能(neng)(neng)(neng)(neng)(neng)處理(li)有關的(de)智(zhi)能(neng)(neng)(neng)(neng)(neng)運(yun)算。智(zhi)能(neng)(neng)(neng)(neng)(neng)電(dian)氣閥(fa)門(men)定(ding)(ding)(ding)位(wei)器(qi)(qi)(qi)(qi)帶(dai)(dai)CPU，可(ke)(ke)處理(li)有關智(zhi)能(neng)(neng)(neng)(neng)(neng)運(yun)算，例(li)如，可(ke)(ke)進(jin)行(xing)前向通(tong)(tong)道(dao)的(de)非線(xian)性(xing)補償等，現(xian)場總線(xian)電(dian)氣閥(fa)門(men)定(ding)(ding)(ding)位(wei)器(qi)(qi)(qi)(qi)還可(ke)(ke)帶(dai)(dai)PID等功能(neng)(neng)(neng)(neng)(neng)模塊(kuai)，實現(xian)相應的(de)運(yun)算。 按反饋信號(hao)的(de)檢測方(fang)法也可(ke)(ke)進(jin)行(xing)分類。

按閥門定位(wei)器(qi)輸入信(xin)號(hao)是(shi)模擬信(xin)號(hao)或(huo)數(shu)字信(xin)號(hao)，可分為普(pu)(pu)通(tong)閥門定位(wei)器(qi)和現場總(zong)線(xian)電(dian)氣閥門定位(wei)器(qi)。普(pu)(pu)通(tong)閥門定位(wei)器(qi)的輸入信(xin)號(hao)是(shi)模擬氣壓或(huo)電(dian)流、電(dian)壓信(xin)號(hao)，現場總(zong)線(xian)電(dian)氣閥門定位(wei)器(qi)的輸入信(xin)號(hao)是(shi)現場總(zong)線(xian)的數(shu)字信(xin)號(hao)。

按動作的(de)方(fang)(fang)向(xiang)可分(fen)為單向(xiang)閥(fa)(fa)門定(ding)位(wei)(wei)器和(he)雙向(xiang)閥(fa)(fa)門定(ding)位(wei)(wei)器。單向(xiang)閥(fa)(fa)門定(ding)位(wei)(wei)器用于(yu)活(huo)塞(sai)(sai)式(shi)執行機構時(shi)，閥(fa)(fa)門定(ding)位(wei)(wei)器只有一個方(fang)(fang)向(xiang)起作用，雙向(xiang)閥(fa)(fa)門定(ding)位(wei)(wei)器作用在(zai)(zai)活(huo)塞(sai)(sai)式(shi)執行機構氣缸(gang)的(de)兩側，在(zai)(zai)兩個方(fang)(fang)向(xiang)起作用。

產品介紹西門子SIEMENS電氣閥門定位器