描述

數(shù)據(jù)可看出郫縣小時供水量變化很大，如果采用定速泵進行供水必然會導致高峰供水時段內(nèi)管網(wǎng)供水壓力不足，夜間用水量較小時管網(wǎng)壓力過高，造成爆管現(xiàn)象。采用變頻恒壓控制后，變頻器的頻率隨郫縣用水量的變化而變化，及時調(diào)節(jié)我廠對郫縣供水量，從而使郫縣城區(qū)管網(wǎng)壓力在一個較小的范圍內(nèi)變化（0.23-0.27Mpa）。另一方面，雖然我廠自用水秒流量變化不大，但由于我廠自用水和郫縣供水為同一水泵加壓后，分作兩條支流，郫縣用水量的變化必然也會導致自用水壓力不穩(wěn)定，采用恒壓變頻控制方式，基本克服了這種變化因素。從上圖曲線也可看出，我廠自用水壓力基本恒定不變。這樣保證了我廠加氯水射器等重要設(shè)備的正常工作，保證了正常的消毒工藝流程，從而保證我廠出廠水水質(zhì)，提高我廠供水的安全可靠性

歐美品牌停產(chǎn)的，常用的“PLC”備品備件

我司產(chǎn)品應用于以下領(lǐng)域：

1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》

2,《智能平鋼化爐系統(tǒng)制造》

3,《PLC可編程輸送控制系統(tǒng)》

4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》

6,《化工廠藥液恒流量計算機控制系統(tǒng)》

7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列

本特利，英維思，伍德沃德，福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂，ACSO，力士樂等各大品牌的DCS系統(tǒng)配件，機器人系統(tǒng)配件，大型伺服系統(tǒng)備件。

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Carrier 24ABB3 13 SEER 2.0T 45k Std 80%Gas Sys.Horiz

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ABB ACS 600 20hp Variable Frequency Motor Drive NEW

ABB 3HAB2242-1 CPU Robot 3HAB22421 USED Free Ship

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Carrier Base 24ABB3 14.5 SEER 1.5T AC Only Sys.

ABB SERVO DRIVE UNIT DSQC 346G 3HAB8101-8/14A

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ABB,Drives,#ACS 550-U1-075A-2

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ABB 3HAA3573-ACA BACKPLANE 3HAA3573ACA

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