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　德國(guó)Rotork Fluid Systems是閥門執(zhí)行器專家。該公司首次將菲尼克斯電氣PLC logic邏輯繼電器用作新的石油管道系統(tǒng)的控制器，靈活的操作性和緊湊的尺寸使得該繼電器模塊成為傳統(tǒng)開關(guān)裝置的理想替代方案。此次Rotork公司與菲尼克斯電氣的合作非常成功，Rotork計(jì)劃在未來將小型控制模塊作為一個(gè)標(biāo)準(zhǔn)的解決方案。
要將采油/氣現(xiàn)場(chǎng)的石油和天然氣安全送達(dá)用戶，閥門及其配套的驅(qū)動(dòng)裝置至關(guān)重要。作為此類設(shè)備的全球最知名制造商，Rotork提供全套的執(zhí)行器、控制器和關(guān)聯(lián)設(shè)備。該公司的Rotork Fluid Systems部門專門從事液壓控制系統(tǒng)的生產(chǎn)和支持工作。
　　除了位于瑞典、意大利和美國(guó)的用于批量生產(chǎn)的生產(chǎn)基地之外，德國(guó)的下薩克森梅勒還是制造非串聯(lián)式閥門執(zhí)行器的重要基地。該公司不僅生產(chǎn)和銷售石油和天然氣管道的控制閥，同時(shí)還生產(chǎn)和銷售水處理廠、污水處理廠、船舶和油輪的控制閥。
　　采用PLC logic邏輯繼電器
　　Rotork公司最近生產(chǎn)了六個(gè)用于阿拉伯地區(qū)的石油管道的執(zhí)行器。這些執(zhí)行器首次配備了基于PLC logic邏輯繼電器。液壓驅(qū)動(dòng)裝置通過將蓋板轉(zhuǎn)動(dòng)四分之一圈來打開和關(guān)閉閥門，閥門通過現(xiàn)場(chǎng)按鈕或控制室中的無電位觸點(diǎn)接收開關(guān)操作的命令。
　　PLC logic繼電器可執(zhí)行開關(guān)閥門的命令、監(jiān)控泵的壓力和運(yùn)行時(shí)間，并進(jìn)行結(jié)束位置控制。“因此，整個(gè)系統(tǒng)是基于PLC logic控制系統(tǒng)的?！钡聡?guó)梅勒的Rotork Fluid Systems的應(yīng)用工程師Friedrich Wsteho說。
　Rotork閥門執(zhí)行器是最高的安全性和可靠性的代名詞。例如，可提供足夠壓力以安全關(guān)閉閥門的儲(chǔ)油箱。Rotork設(shè)備的獨(dú)特之處還在于其產(chǎn)品系列中包含適于低溫(-60 °C)等特殊氣候條件的驅(qū)動(dòng)裝置。其產(chǎn)品組合包括：Contactron混合型馬達(dá)起動(dòng)器、PSR安全繼電器、MACX Analog Ex-Namur和PLC logic邏輯繼電器系統(tǒng)，保證了Rotork設(shè)備的可靠運(yùn)行，并且這些裝置均來自菲尼克斯電氣。整個(gè)電氣設(shè)備被安裝在防爆控制柜(通過Ex d認(rèn)證)中，并使用大量螺栓進(jìn)行固定。
　　緊湊靈活
　　Wsteho對(duì)PLC logic邏輯繼電器系統(tǒng)的緊湊型設(shè)計(jì)感到滿意?！拔覀?cè)?jīng)打算用傳統(tǒng)繼電器設(shè)備實(shí)現(xiàn)這些功能，但是傳統(tǒng)設(shè)備需要占用更多現(xiàn)場(chǎng)連接器空間。其靈活性也相對(duì)欠缺，”Wsteho解釋說，“使用PLC logic繼電器，現(xiàn)在可以為各個(gè)PLC Interface模塊精確分配其所需的輸入和輸出，系統(tǒng)還可以根據(jù)需要擴(kuò)展附加的模塊?！?br /> 　PLC logic邏輯繼電器系統(tǒng)所能做的不僅僅是實(shí)現(xiàn)繼電器功能。“通過使用PLC logic繼電器，我們可以監(jiān)控設(shè)備運(yùn)行時(shí)間，甚至能為部件定時(shí)。而傳統(tǒng)控制器占用更多的空間，并且工程方面也更為復(fù)雜。以菜單為導(dǎo)向的、直觀可用的編程界面讓初學(xué)者輕松入門，并完成初始簡(jiǎn)單項(xiàng)目的實(shí)施。任何了解傳統(tǒng)繼電器開關(guān)并熟悉電路圖的電工都可以學(xué)習(xí)該系統(tǒng)，進(jìn)而通過培訓(xùn)快速掌握。”Wsteho說。

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