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切断阀选型技巧   发布时间:18-07-14



切断阀足球比分波胆是自动化系统中执行机构的一种,由多弹簧气动薄膜执行机构或浮动式活塞执行机构与调节阀组成,接收调节仪表的信号,控制工艺管道内流体的切断、接通或切换。可广泛地应用在石油、化工、冶金等工业生产部门。在现场使用中,切断阀往往会出现切断不好,泄漏大等故障。除因堵卡、允许压差过小而被顶开等原因造成的泄漏增加外,绝大部分都是由于调节阀的结构缺陷和选型不当造成的。


YI、JIEGOUXINGSHIDEXUANZE

足球比分波胆SHUANGMIFENGLEIDIAOJIEFA(RUSHUANGZUOFA、SHUANGMIFENGTAOTONGFADENG)ZHUYAODEQUEDIANZHIYIJIUSHIXIELOUDA。DANSHANGSHIJI80NIANDAIYIQIAN,YOUYUDANGSHIJIAOSHENGXINGTAOTONGFA,RANER,BUSHAOCHANGJIAQUEZAITAOTONGFASHANGXIALEHENDAGONGFUYIGAIJINJIEGOULAIJIANGDIXIELOULIANG,SHIQIYANBIANCHENGFEICHANGFUZADEJIEGOU。YUSHI,ZHEIYOUDAILAILEXUDUOBUZU:LINGJIANDUO、KEKAOXINGCHA、BEIJIANNAN、WEIHUNAN、QIEDUANXIAOGUOBULIXIANGDENGDENG。SHIJISHANG,ZHEISHISHEJISILUDOUXIANRULEWUQU,YUQIZAIFATIDE“XINZANG”NEIZUORUCIFUZADEGAIDONG,DAOBURUTONGGUOWAIBUDIAOZHENGLAISHIXIAN。YINCI,YINGXUANZEDANMIFENGLEIDIAOJIEFA。ZHEIYANG,MIFENGWENTI、KEKAOXINGWENTI、WEIXIUHEBEIJIANWENTIJUNBEIYIYIJIEJUELE。CISHI,JIEJUEMAODUNDEZHONGDIANZHUANHUAWEIJIEZHIDUIFADEBUPINGHENGLIZENGDADEWENTI,JIEJUETAJINXUPEIQIANGLIHUOSAIZHIXINGJIGOU、JIACUFAGANJIKE。ZHEIZHONGTONGGUOWAIBULAIJIEJUEDEBANFAXIANRANBITONGGUONEIBUDEFUZAGAIJINYAORONGYIDEDUO, YUQISHUOZHEISHIBANFAWENTI,HAIBURUSHUOZHEISHISILUWENTI。JINRUDAOJIUSHINIANDAI,RENMENKAISHIXUNZHAOJIEGOUGENGJIANDAN、MIFENGGENGKEKAODEQIEDUANFA。ZHEISHI,FAXIANJIAOXINGCHENGFABIZHIXINGCHENGFA(DANZUOFA、TAOTONGFA、ZHAFA)GENGJUYOUYOUYUEXING,YUSHICHANSHENGLESANPIANXINQIEDUANDIEFA、QUANGONGNENGQIEDUANFA、YINGMIFENGQIEDUANQIUFA。

ER,MIFENGMIANDEXUANZE

(1)MIANDUIMIANMIFENG:

足球比分波胆CHANGJIANDEZHUSAIFAXIN,MIFENGMIANWEI60°CDEXIAOZHUIMIAN,FAZUOYESHI60°CDEXIAOZHUIMIAN,ZHEIGEXIAOZHUIMIANDEKUANDUTONGCHANGZAI0.5 mm~2 mmZHIJIAN,DAIMIFENG,BIXUBAOZHENGZHUITIJIECHULIANGHAO。DANSHIJISHANG,TAZONGSHISHOUDAOJIAGONGWUCHA(RUXINZANG,YUANDU,QINGXIEDUDENG)DEYINGXIANG,BINGQIEQIMIFENGXIAOGUOBUSHIHENLINGRENMANYI。ZHEIXIEFAMENDEXIELOULVTONGCHANGWEI10-4,KEYIJINGQUEYANMOZHI10-6,YIHUODELIANGHAODEMIFENGDENGJI。

(2)QIUXINGMIFENG:

FAXINDEQIUXINGXUANZHUANYUGUDINGDEXIAOZUOZHUIMIANXIANGQIE,BINGQIETAMENZHIJIANDEXIANJIECHUYOUYUSHANGSHUMIANDUIMIANMIFENG。HUALINGONGSIYINJINDEQUANGONGNENGCHAOQINGFAMENHEQIUXINGMIFENGDIEFAJUNCAIYONGZHEIYILINIAN。XIELOULVKEDA10-6~10-8,GAOXINGNENGSANPIANXINDIEFAKEGAODA10-8。LINGXIELOU。

SAN、MIFENGCAILIAODEXUANZE

(1)RUANMIFENG

足球比分波胆CHUNAIFUSHIDECHENLIFAMENWAI,YIBANDERUANMIFENGFAZHIFAXINHUOFAZUOLIANGZHEZHIYICAIYONGFEIJINSHUCAILIAO(ZHUYAOWEIJUSIFUYIXI,HAIYOUXIANGJIAODENG)DEMIFENGXINGSHIDEFA。RUANMIFENGFAMIFENGXIAOGUOZUIJIA,DANZAIGUANDAOANZHUANG、XITONGDEQINGXIZHONGDOUYOUKENENGLIUXIAHUODUOHUOSHAOBUGANJINGDEZAWU(RUHANZHA、TIEXIEDENG),TAMENLIUJINGDIAOJIEFASHI,RONGYIBARUANMIFENGFAZUOHUOFAXINHUASHANG,SHIXIELOULIANGZENGJIA,MIFENGDEKEKAOXINGCHA。SUOYI,XUANZERUANMIFENGJIEGOUBIXUKAOLVJIEZHIDEQINGJIEHETOUYUNQIANYANGECHONGXIGUANDAO。

(2)YINGMIFENG

硬密封再堆焊耐磨合金等是切断阀的最佳选择。这种方式在考虑密封性的同时也考虑了使用寿命和可靠性,虽然出厂指标只有10-6~10-8,达不到软密封零泄漏的效果,但足以满足严密切断的要求,而且它经久耐用,从经济的角度考虑更合算。

SI、MIFENGKEKAOXINGDEKAOLV

足球比分波胆(1)RUANMIFENG,QIEDUANXIAOGUOHAO,DANBUSHIYIYONGYUHANKELIJIEZHI,YIDANHUASHANG,XIELOUHUIJIJUZENGJIA。YINCI,TIAOJIANYUNXUSHIJINLIANGXUANYONGYINGMIFENG。QUANGONGNENGCHAOQINGXINGFAYINGMIFENGKEDA10-7~10-8,SANPIANXINDIEFAKEDALINGXIELOU。

足球比分波胆(2)DUIMIFENGNAIMOXINGDEKAOLV:CHUXUANYINGMIFENGWAI,DUIXIELOUYAOQIU10-6YISHANGDEQIEDUANXINGDIAOJIEFA,YINGGAI(HUOZHESHUOBIXU)DUIHANNAIMOHEJINYITIGAOMIFENGDENAIMOXING、NAICHONGSHI、NAIHUASHANGDENENGLI,TIGAOFADESHOUMING。

足球比分波胆(3)DUIGAOWENJIEZHIDEQIEDUANDIAOJIEFAZAISHIWENXIAZUZHUANGDE,ZAIGAOWENXIAGONGZUO,WENDUBIANHUAJIBAIDU。REPENGZHANGHUIGAIBIANZHUANGPEISHIJIANLIDEMIFENGBIYA。GUOJIN,MIFENGMIANHUIKAZHU,YUNDONGSHIHUIYANZHONGCASHANG,LASHANG;GUOSONG,MIFENGYABUGOU,LIANGZHONGQINGKUANGXIELOUDOUHUIJIJUZENGJIA。JIEJUEDEZUIHAOBANFASHIYONGDANXINGFAZUOLAIXISHOUZHEIYIBIANHUAZAOCHENGDECHAYI。TONGCHANGYOUSANZHONGDANXINGFANGAN:①DANHUANGSHI;②BOPIANSHIROUXINGJINSHUHUAN;③GANGROUXIANGJIDEDANXINGFAZUO。HOUZHEZUIHAO,JIYOUROUXINGKEFUREPENGZHANG,YOUYOUGANGDUBINGDUINAIMOHEJINLAITIGAONAIMOMIANDEKEKAOXING。

(4)DUIHANKELIDECHONGSHIJIEZHI,YAOKAOLVFAXINBIRANGKAIGAOSUJIEZHIDEZHIJIECHONGSHI。ZHIXINGCHENGFA、DIEFADOUBUJUBEIZHEIYIGONGNENG,ERQUANGONGNENGCHAOQINGXINGFAPIANXINXUANZHUANJUYOUZHEIYITEDIAN。YUCI,YINGXUANHOUERZHONGFA。

(5)DUIYUYINGMIFENG,BIXUYOUZUGOUDEYINGDUCHA,TONGYIYINGDUCAILIAO“HUBUXIANGRANG”,RONGYICASHANG。

(6)DUISUOPEIZHIXINGJIGOUYINGZENGDATUILIHEGANGDU,SHIZHIDONGZUOZIRU。

WU、QIEDUANFAZHUYAOFAXING

按上述分析,紧急切断阀的主要阀型如下,选择切断阀应综合考虑泄漏率、介质种类、介质温度、流量系数等各种参数和性价比。在如下优选秩序中,先考虑硬密封,再考虑软密封。

足球比分波胆(1)QUANGONGNENGCHAOQINGXINGDIAOJIEFA

(2)三偏心金属硬密封蝶阀

(3)SHUANGPIANXINQIUMIANMIFENGDIEFA

(4)球阀

(5)PIANXINXUANZHUANFA

(6)DANZUOFA

(7)DANZUOTAOTONGFA

(8)RUANMIFENGFA

足球比分波胆LIU、“GAO、DA”QIEDUANFAXUANZE

GAOWEN、GAOYA、DAYACHA、DAKOUJINGQIEDUANSHIYIGEBIJIAOPUBIANDENANTI,ZHUYAOYUANYINSHIQUESHAOTONGSHIJUYOUYUNXUYACHADA、QIEDUANHAO、NAIGAOWENPENGZHANGKADEFA,RUGAOYAZHENGQIDIAOJIEYUQIEDUAN,YINYACHADA(1~3MPaHUOGENGDA),KOUJINGDA(DN200~300),BUDEBUCAIYONGPINGHENGSHIDESHUANGMIFENGJIEGOU(RUSHUANGZUOFAHUOSHUANGMIFENGTAOTONGFA),JINGTESHUCHULI,XIELOULVKEDA10-4,QUANGONGNENGCHAOQINGXINGDIAOJIEFAZONGHEXINGNENGHAO,KEJIAOHAODEJIEJUEZHEIYINANTI,XIELOULVKEDA10-6~10-7YISHANG。



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