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渦輪流量計等儀表現場使用中的度問題詳解


文章日期:2018-12-11|閱讀數:


ZHAIYAO:JINNIANLAI, SUIZHUWOGUOSHEHUIJINGJIDEFEISUFAZHANHEGONGYEHUAJINCHENGDEBUDUANJIAKUAI, GONGYEZIDONGHUAYIBIAO, YOUQISHILIULIANGYIBIAOYEYIZAIGONGYESHENGCHANZHONGDEGEGEBUMENZHONGDEDAOLEGUANGFANDEYINGYONG, DUIGUOMINJINGJIDEFAZHANJUYOUJUDADETUIDONGZUOYONG。DANSUIZHUGONGYESHENGCHANGUOCHENGZHONGBUDUANSHIYONG, ZHEXIELIULIANGYIBIAODEDUJIUHUIZHUJIANXIAJIANG, YANZHONGYINGXIANGZHENGCHANGDEGONGYESHENGCHANJINCHENG。BENWENJIANGYIJIZHONGCHANGJIANDELIULIANGYIBIAOWEILI, DUIZAOCHENGQIDUXIAJIANGDEYUANYINJINXINGFENXI, BINGZAICIJICHUSHANGTICHUYIXIESHIYONGZHONGDEZHUYISHIXIANG。

  流量儀表 (英文:flowmeter) 又常被稱作流量計, 目前我們常用的流量儀表主要有電磁流量計渦街流量計浮子流量計、超聲波流量計以及渦輪流量計幸运飞艇注册开户网址等。流量儀表主要應用于工業生產、能源計量、生物技術以及海洋氣象等領域, 對國民經濟的發展起到了舉足輕重的作用。

渦輪流量計等儀表現場使用中的度問題詳解

1、正確安裝并使用的初期造成流量儀表度下降的原因分析:

  YIBANERYAN, LIULIANGYIBIAODECHUCHANGDUDOUSHIZAIBIAOZHUNGONGZUOTIAOJIANXIADECHUDE, ERSHIJISHIYONGSHIDETIAOJIANWANGWANGYUBIAOZHUNGONGZUOTIAOJIANYOUHENDADECHAJU。ZAISHIJISHIYONGGUOCHENGZHONG, LIULIANGYIBIAODECHUANGANQIHUIJINGCHANGYULIUTIJIEZHIXIANGHUJIECHU, YOUYUSHOULIUTIDEFUSHI、ZHANFU、MOSUNYIJIQIYADENGYINSUDEYINGXIANG, QIDUJIUHUIBUKEBIMIANDIFASHENGBIANHUASHENZHISHIXIAO。

1.1、電磁流量計:

幸运飞艇注册开户网址   DIANCILIULIANGJIDEGONGZUOYUANLISHIGENJUFALADIDIANCIGANYINGDINGLI, YOUYUCHUANGANQIDEGUANDAOLIUTONGMIANJIHUIDUICELIANGZHICHANSHENGYINGXIANG, YINCI, DANGLIUTIJIEZHIDEYALIWENDUBUTONGYUBIAOZHUNGONGZUOTIAOJIANSHI, YINLIUTONGMIANJIDEBUTONGERZAOCHENGYIBIAODUSHUDEGAIBIANKEYIJISUANCHULAI, FOUZEYAOCHANSHENGYIDINGDEWUCHA。SHIJIANZHONGWOMENKEYIKANDAO, ZHEZHONGYIBIAODUIZHIGUANDUANDEYAOQIUBIJIAODI, SHIYONGZHEZHIXUANZHAOCHANPINSHUOMINGSHUSHIYONGJIKE。YIBANERYAN, ZHEZHONGYIBIAOSUOCELIANGDEDADUOSHIGONGZUOZHUANGTAIXIADETIJILIULIANG, RUGUOXUYAOCELIANGBIAOZHUNZHUANGTAIXIADETIJILIULIANG, ZEXUYAOJINXINGMIDUBUCHANG。

1.2、容積式流量計:

幸运飞艇注册开户网址   RONGJISHILIULIANGJIZAISHIJIGONGZUOGUOCHENGZHONGSUOYINQIDEWUCHA, ZHUYAOSHIYOUYULIUTIJIEZHIDEWENDUHEYALIDUIJILIANGQIANGTIJICHANSHENGDEYINGXIANGERYINQI。DANGZHIDAOJILIANGQIANGTIDECAIZHIHOU, JIUNENGGOUJISUANCHUQITIJIDEBIANHUA, JINERKEYIGENJUSHIJIXUYAODUIXIANSHIYIBIAODEDUSHUJINXINGXIUZHENG。CONGSHIJIANLAIKAN, YOUYULIUTIDEZHANDUDUILIULIANGYIBIAODEDUSHUYEHUICHANSHENGYINGXIANG, YINCIYAOGENJULIULIANGYIBIAODESHUOMINGSHUJINXINGQUANMIANDEKAOLV。YIBANERYAN, ZHIGUANDUANDECHANGDUBUHUIDUILIULIANGYIBIAODEDUCHANSHENGYINGXIANG, ZHESHIGAILEILIULIANGYIBIAO***WEITUCHUDEYOUSHI。CHUANTONGDERONGJISHIYIBIAOSHANGXIANSHIDESHILIUTIZAIGONGZUOZHUANGTAIXIADETIJILIULIANG, ERXIANZAIDEXINXINGLIULIANGJIDADUODOUSHIYONGLEZHINENGXINGDEXIANSHIYIBIAO, BINGDUIQIMIDUJINXINGLEZIDONGBUCHANG。

1.3、渦輪流量計:

  YIBANERYAN, WOLUNLIULIANGJIDUISHIJIXIANCHANGDETIAOJIANYAOQIUBIJIAOGAO, SHIYONGZHEZHIYOUJINKENENGDIMANZUQIYAOQIU, CAINENGBAOZHENGTADECHUCHANGDU。DANGLIUTIJIEZHIDEWENDUHEYALIYUBIAOZHUNGONGZUOTIAOJIANXIANGCHASHENYUANSHI, KEYIGENJUCHUANGANQIDECAIZHIYUWENDU、YALIJISUANCHUCHUANGANQIKETIDETIJIBIANHUA, JINERDUIYIBIAODEDUSHUJINXINGXIUZHENG。DANGLIUTIJIEZHIGONGZUOZHUANGTAIXIADEZHANDUHEBIAOZHUNLIUTIDEZHANDUCHAJUBIJIAODASHI, YINGDANGGENJUYIBIAOSHENGCHANCHANGTIGONGDEZHANDUXIUZHENGQUXIANTUJIAYIXIUZHENG。CONGSHIJIANLAIKAN, WOLUNLIULIANGJIDUIQISHANG、XIAYOUZHIGUANDUANDECHANGDUDOUYOUYIDINGYAOQIU。GAILEIYIBIAOSHANGXIANSHIDESHIJIEZHIGONGZUOTIAOJIANXIADETIJILIULIANG, RUGUOXIANGZHIDAOBIAOZHUNTIJILIULIANGHUOZHEZHILIANGLIULIANG, RENGXUJINXINGMIDUBUCHANG。YOUYUWOLUNLIULIANGJIDECELIANGDUBIJIAOGAO, YINCICHANGBEIYONGZUOBIAOZHUNBIAODUIGONGZUOYIBIAOJINXINGBIAODING。

2、使用一段時間后, 流量儀表度的變化及處理建議:

  TONGCHANGQINGKUANGXIA, LIULIANGYIBIAODESHIJIGONGZUOHUANJINGDOUBIJIAOCHA, SHIYONGYIDUANSHIJIANHOU, QIDUYIBANDOUHUICHUXIANBUTONGCHENGDUDEXIAJIANG, YIXIAZHENDUIBUTONGLEIXINGDELIULIANGYIBIAOFENBIEJINXINGSHUOMING。

2.1、電磁流量計:

  電磁流量計通常是由傳感器和轉換器構成的, 一般情況下其工作可靠性較強。但經過長期的使用后, 其度也會下降甚至失去功效。一般而言, 如果儀表所顯示的數值與流體物料的平衡規律明顯不相符或者根本沒有顯示數值時, 可以先將傳感器與轉換器斷開, 單獨用“自校”功能對轉換器進行檢查, 若發現問題, 可以采用“換印刷板”的方法對其逐一排查, 或者干脆換一新的轉換器, 以保持其正常工作。經過上述檢查后, 如果確定不是轉換器出現的故障, 則就要檢查傳感器。
幸运飞艇注册开户网址   由于流量計長時間工作在高溫、高壓力的環境下, 或者安裝時對測量管造成了較大的機械應力, 使測量管的襯里遭到嚴重的損壞, 進而導致電極絕緣層破壞或勵磁線圈絕緣層破壞, 儀表顯示的數值誤差增大或者根本不顯示數值。在這樣的情況下, 就必須將傳感器拆下來并對其進行徹底的修理。

2.2、容積式流量計與渦輪流量計:

  CONGCHANSHENGLIULIANGYIBIAOBIANHUADEYUANYINLAIKAN, RONGJISHILIULIANGJIYUWOLUNLIULIANGJIJIBENSHANGXIANGTONG。CONGSHIJIANLAIKAN, JIEZHIZHONGYIBANDOUYOUZAZHI, BINGQIEDUIZHOUCHENGHEZHOUYAOCHANSHENGYANZHONGDEMOSUN, ZAZHIJINRUZHOUCHENGYUZHOUYAOZHIJIANDEKONGXIZHONGHUIYINGXIANGQIZHUANSU, CONGERZAOCHENGYIBIAOXIANSHIDESHUZHICHUXIANWUCHA;TONGSHI, DANGLIUTIDEWENDUHEYALIFASHENGBIANHUASHI, HUISHIGUANDAONEIDEYETIYICHUQISUOHANDEKONGQIHUOZHEYINGUANDAONEIDEYALIDIYULIUTIDEBAOHEZHENGQIYAERSHIBUFENYETIBIANCHENGZHENGQI, YEKENENGYINWEIJIEZHIDEFUYASHIWAIMIANDEQITIBEIXIRUDAOGUANDAONEI, DANBUGUANSHENMEYUANYINCHANSHENGDEQITI, ZHIYAOSUIZHUBEICEYETIJINXINGLIUDONG, JIUHUIZAOCHENGYIBIAODEZHISHISHUZHIZENGDA, CONGERCHUXIANWUCHA。

  針對以上問題, 筆者認為:在流量儀表安裝的初期, 首先在流量儀表的上游和下游各兩倍管徑的管壁上安裝一對測壓口, 必要時可以與差壓計相連接。在正常工作時, 記下流量儀表指示的數值與差壓計所指示的數值之間的對比關系, 如果正常, 則可以將這個對比關系當作以后再次檢查流量儀表工作狀態的依據。例如, 通過定期對該對比關系進行測量, 如果發現在同樣的差壓計指示值下流量儀表所指示的數值偏小, 則基本上可以確定是流量儀表出現了故障。當檢查流量儀表的傳感器時, 可以先對發信器進行檢查。
  將發信器單獨取下, 先對其輸入一個已知的信號, 再對照其輸出值, 通過對比即可找到問題所在。如果故障無法在短時間內予以排除, 為了保證流量儀表的正常使用, 可以換上一個新的。如果傳感器沒有出現故障, 則就要將流量儀表從流程管線上卸下來, 對其進行仔細的檢查。如果流量儀表不可避免地要安裝在雜質比較多的流體或有可能產生氣體的液體中時, 可以在其上游安裝一個過濾器或者消氣器, 同時還要加強日常的檢測和維護, 定期清理這些設備中的污垢和廢氣, 以確保流量儀表的正常使用。

結束語:

  ZONGERYANZHI, YINGXIANGLIULIANGYIBIAODUDEYUANYINHENDUO, WOMENZHIYOUCONGSHIJICHUFA, CHONGFENFAHUIZISHENDEZHUGUANNENGDONGXING, JIJITANSUOCHUANGXINHEWEIHUFANGFA, CAINENGBAOZHENGLIULIANGYIBIAODEZHENGCHANGYUNXING。



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