產品介紹西門子SIEMENS電氣閥門定位器

產品(pin)作(zuo)用:

電氣閥(fa)門定(ding)(ding)位(wei)(wei)器(qi)是控制閥(fa)的(de)主要附件.它將閥(fa)桿(gan)位(wei)(wei)移信(xin)(xin)(xin)(xin)號(hao)作(zuo)為輸入的(de)反饋(kui)(kui)測量(liang)(liang)信(xin)(xin)(xin)(xin)號(hao),以(yi)(yi)控制器(qi)輸出(chu)(chu)信(xin)(xin)(xin)(xin)號(hao)作(zuo)為設定(ding)(ding)信(xin)(xin)(xin)(xin)號(hao)，進行(xing)比較，當兩者有偏差(cha)時，改變其(qi)到執行(xing)機構(gou)的(de)輸出(chu)(chu)信(xin)(xin)(xin)(xin)號(hao)，使(shi)執行(xing)機構(gou)動作(zuo)，建立(li)了閥(fa)桿(gan)位(wei)(wei)移倍(bei)與控制器(qi)輸出(chu)(chu)信(xin)(xin)(xin)(xin)號(hao)之間(jian)的(de)一(yi)一(yi)對應(ying)關(guan)系(xi)(xi)。因此，閥(fa)門定(ding)(ding)位(wei)(wei)器(qi)組(zu)成以(yi)(yi)閥(fa)桿(gan)位(wei)(wei)移為測量(liang)(liang)信(xin)(xin)(xin)(xin)號(hao)，以(yi)(yi)控制器(qi)輸出(chu)(chu)為設定(ding)(ding)信(xin)(xin)(xin)(xin)號(hao)的(de)反饋(kui)(kui)控制系(xi)(xi)統。該控制系(xi)(xi)統的(de)操縱變量(liang)(liang)是閥(fa)門定(ding)(ding)位(wei)(wei)器(qi)去執行(xing)機構(gou)的(de)輸出(chu)(chu)信(xin)(xin)(xin)(xin)號(hao)。

閥(fa)門定位(wei)(wei)(wei)器(qi)(qi)(qi)按(an)輸(shu)(shu)(shu)入(ru)信(xin)(xin)號(hao)(hao)(hao)分為(wei)氣(qi)(qi)(qi)(qi)動(dong)閥(fa)門定位(wei)(wei)(wei)器(qi)(qi)(qi)、電(dian)(dian)氣(qi)(qi)(qi)(qi)閥(fa)門定位(wei)(wei)(wei)器(qi)(qi)(qi)和智(zhi)能閥(fa)門定位(wei)(wei)(wei)器(qi)(qi)(qi)。氣(qi)(qi)(qi)(qi)動(dong)閥(fa)門定位(wei)(wei)(wei)器(qi)(qi)(qi)的輸(shu)(shu)(shu)入(ru)信(xin)(xin)號(hao)(hao)(hao)是標準氣(qi)(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)，例如(ru)(ru)，20~100kPa氣(qi)(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)，其輸(shu)(shu)(shu)出(chu)信(xin)(xin)號(hao)(hao)(hao)也是標準的氣(qi)(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)。電(dian)(dian)氣(qi)(qi)(qi)(qi)閥(fa)門定位(wei)(wei)(wei)器(qi)(qi)(qi)的輸(shu)(shu)(shu)入(ru)信(xin)(xin)號(hao)(hao)(hao)是標準電(dian)(dian)流(liu)或電(dian)(dian)壓信(xin)(xin)號(hao)(hao)(hao)，例如(ru)(ru)，4~20mA電(dian)(dian)流(liu)信(xin)(xin)號(hao)(hao)(hao)或1~5V電(dian)(dian)壓信(xin)(xin)號(hao)(hao)(hao)等，在電(dian)(dian)氣(qi)(qi)(qi)(qi)閥(fa)門定位(wei)(wei)(wei)器(qi)(qi)(qi)內部將電(dian)(dian)信(xin)(xin)號(hao)(hao)(hao)轉換為(wei)電(dian)(dian)磁(ci)力，然后輸(shu)(shu)(shu)出(chu)氣(qi)(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)到(dao)撥動(dong)控(kong)制閥(fa)。智(zhi)能電(dian)(dian)氣(qi)(qi)(qi)(qi)閥(fa)門定位(wei)(wei)(wei)器(qi)(qi)(qi)它將控(kong)制室輸(shu)(shu)(shu)出(chu)的電(dian)(dian)流(liu)信(xin)(xin)號(hao)(hao)(hao)轉換成驅動(dong)調節閥(fa)的氣(qi)(qi)(qi)(qi)信(xin)(xin)號(hao)(hao)(hao)，根據調節閥(fa)工作時閥(fa)桿摩擦力，抵(di)消介質壓力波動(dong)而產生的不平衡力，使閥(fa)門開度對應(ying)于(yu)控(kong)制室輸(shu)(shu)(shu)出(chu)的電(dian)(dian)流(liu)信(xin)(xin)號(hao)(hao)(hao)。并且可以進行智(zhi)能組態設(she)置相應(ying)的參(can)數，達(da)到(dao)改善控(kong)制閥(fa)性能的目的。

按閥(fa)(fa)門(men)定位(wei)(wei)器(qi)輸(shu)(shu)出(chu)和輸(shu)(shu)入(ru)(ru)信(xin)號(hao)的(de)增(zeng)益(yi)符(fu)號(hao)分為(wei)(wei)正作用閥(fa)(fa)門(men)定位(wei)(wei)器(qi)和反(fan)作用閥(fa)(fa)門(men)定位(wei)(wei)器(qi)。正作用閥(fa)(fa)門(men)定位(wei)(wei)器(qi)的(de)輸(shu)(shu)入(ru)(ru)信(xin)號(hao)增(zeng)加時(shi)，輸(shu)(shu)出(chu)信(xin)號(hao)也增(zeng)加，因(yin)此，增(zeng)益(yi)為(wei)(wei)正。反(fan)作用閥(fa)(fa)門(men)定位(wei)(wei)器(qi)的(de)輸(shu)(shu)入(ru)(ru)信(xin)號(hao)增(zeng)加時(shi)，輸(shu)(shu)出(chu)信(xin)號(hao)減小，因(yin)此，增(zeng)益(yi)為(wei)(wei)負。

按閥(fa)門(men)定(ding)(ding)位器(qi)是否帶(dai)CPU可(ke)(ke)(ke)(ke)分為普通電(dian)(dian)氣閥(fa)門(men)定(ding)(ding)位器(qi)和智能(neng)(neng)電(dian)(dian)氣閥(fa)門(men)定(ding)(ding)位器(qi)。普通電(dian)(dian)氣閥(fa)門(men)定(ding)(ding)位器(qi)沒(mei)有CPU，因此，不具有智能(neng)(neng)，不能(neng)(neng)處理有關(guan)的(de)智能(neng)(neng)運(yun)算(suan)。智能(neng)(neng)電(dian)(dian)氣閥(fa)門(men)定(ding)(ding)位器(qi)帶(dai)CPU，可(ke)(ke)(ke)(ke)處理有關(guan)智能(neng)(neng)運(yun)算(suan)，例如，可(ke)(ke)(ke)(ke)進行(xing)前向通道的(de)非線性補償等(deng)，現(xian)(xian)場總線電(dian)(dian)氣閥(fa)門(men)定(ding)(ding)位器(qi)還可(ke)(ke)(ke)(ke)帶(dai)PID等(deng)功(gong)能(neng)(neng)模塊，實(shi)現(xian)(xian)相應的(de)運(yun)算(suan)。 按反饋信號的(de)檢測方法(fa)也可(ke)(ke)(ke)(ke)進行(xing)分類(lei)。

按(an)閥門(men)定(ding)(ding)位(wei)(wei)器(qi)(qi)(qi)輸(shu)入信號是(shi)模擬(ni)信號或數(shu)字信號，可分為普(pu)通閥門(men)定(ding)(ding)位(wei)(wei)器(qi)(qi)(qi)和現(xian)場(chang)總線(xian)電(dian)(dian)氣(qi)閥門(men)定(ding)(ding)位(wei)(wei)器(qi)(qi)(qi)。普(pu)通閥門(men)定(ding)(ding)位(wei)(wei)器(qi)(qi)(qi)的輸(shu)入信號是(shi)模擬(ni)氣(qi)壓或電(dian)(dian)流、電(dian)(dian)壓信號，現(xian)場(chang)總線(xian)電(dian)(dian)氣(qi)閥門(men)定(ding)(ding)位(wei)(wei)器(qi)(qi)(qi)的輸(shu)入信號是(shi)現(xian)場(chang)總線(xian)的數(shu)字信號。

按(an)動作(zuo)(zuo)的方(fang)向可(ke)分(fen)為單向閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)(qi)和(he)雙(shuang)向閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)(qi)。單向閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)(qi)用(yong)于活塞(sai)式(shi)執行機構時，閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)(qi)只有一個方(fang)向起(qi)作(zuo)(zuo)用(yong)，雙(shuang)向閥(fa)(fa)門定(ding)(ding)位(wei)器(qi)(qi)作(zuo)(zuo)用(yong)在(zai)活塞(sai)式(shi)執行機構氣缸的兩側，在(zai)兩個方(fang)向起(qi)作(zuo)(zuo)用(yong)。

產品介紹西門子SIEMENS電氣閥門定位器