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亞博網頁登陸 | 2010-12-13

四、輸氣管線直埋全焊接球閥的技術特點

城市次高壓、高壓天然氣管道要求管線閥門必須結構簡單、啟閉迅速、流體阻力小、密封性能好、耐腐蝕,維護保養簡單、運行可靠和使用壽命長。張家港港華燃氣公司曾建設的高壓管線(2.5MPa)中采用了美國卡麥隆(CAMERON)公司生產的 DIN500 公稱壓力為 50MPa 的直埋全焊接全通徑球閥,很好地解決了國內一般管道球閥經常出現的內漏、閥桿泄漏、閥門外表面腐蝕及維護保養難的問題.

一、全焊接球閥的結構特點

1.1 全焊接式結構

qiufafatiyou 6 bufenduanzaodeketizhuangpeihouhanjieercheng,jiegoujincou、zhenggeqiufahunranyiti.muqianguoneishengchanshiyongdedakoujingqiufaduoweifentisanpianshigouzao,gebufenzhijiancaiyongluoshuanlianjie。yusanpianshiqiufaxiangbi,zaiqiangduxiangtongdeqingkuangxiaquanhanjieshiqiufaduanjiandebihoukezuodehenbo。famenzhongliangkejianqingsifenzhiyi,tongshiduiguandaowanquhejiyadedikanglizengqiang;youyuquxiaolefatifalanheluoshuan,waixingchicunjianxiao,tongjiaohuanxiaochuleqianzaidewailoutongdao。lingwai,fatihanjiejiegouneibuquxianliuchang.baochileyuguandaoderunhualianjiewusijiao,jiezhiliudongxinghao。

1.2 框軸固定球設計

qiufagenjuqiutixingshikefenweigudingqiuhefudongqiuliangzhong。guoneichanpinyibancaiyongdefudongqiujiegou,qiutizaijiezhideyalizuoyongxiaqiutijinyazaichukouduandemifengmianshang,dadaofengbimude,yidanfatijinchukouyalichajiaodashi,yinniujuhendawangwangdakaihennan。quanhanjieqiufacaiyonglegaoqiangdudeduangangfagan,youwaibao ptfe(jusifuyixi)debuxiugangzhouchengzuozhichengzhuandongpinghuajingque。youyushuzhouzhichengdefagankeyixishouguanxianjiezhiyalichanshengdetuili,bingqiekeyijianshaofaqiuhefazuozhijiandemoca,yincijishizaiquanyachaxia,caozuoaomendeniujurengranyaoqiuhendi,qiufakaiguanziru。

1.3 旋轉閥座設計

dangqiufazaijiejinquanguanhuoganggangkaiqishi,faqiuyufazuozhijiandezhaidianweizhi(9 dianzhongweizhi)yintianranqibeijieliuchenggaosutuanliuershoudaogaosuchongshua,chengweifazuomifengmosunzuiyanzhongdequcheng.zuihouyinqixielou。dn300(jiyishangchicun)de cameron(kamailong)qiufacaiyongledutedexuanzhuanfazuo.meicikaiqihuoguanbifamenshi.shangxiayoudefazuobeifaqiushangdebopianbodongxuanzhuan 15 sheshidu,zheyangzhenggefazuomifengmianlunliushoutianranqichongshua,famenkaihuoguan12cizhihoutongyibuweicaizhongxinshouchongshuayici,zhenggefazuomosunbaochijunyun,gongzuoshoumingdadayanchang。changguiqiufadefazuoshigudingde,changshijianyunxinghoufazuoshousunshangdebuweiyeshigudingdewangwanghuiyinfaneili。lingyifangmian.guandaozaiyunxingyiduanshijianhouyixieyouhaidechenjiwuhuiduijizaifazuohuanshang,yinqichangguiqiufafazuokasihuozhewufazhengchangmifeng,erxuanzhuanfazuozaizhuandongshizekeqingchufazuobiaomiandeyiwu。

1.4 閥桿及二級閥座緊急注脂密封

faganshangbuquyudemifengcailiao pffe shiyizhongdimocanailaohuacailiao,shiyongshoumingchang。dn50(jiyishangchicun)dequanhanjieqiufafaganhuanbeiyoumifengzhizhuruxitong,yidanqiufafazuozhijianjinruyiwuersunhuaimifengmian,rengrankeyitongguoerjifazuozhuruzhuanyongmifengzhiweichimifeng。changguiqiufazebujuyoumifengzhizhurujiegou.yidanmifengmiansunhuaifashengneilou,zhiyougenghuanzhenggeqiufa.

1.5 閥腔壓力的自動內部泄放及雙隔斷中腔放壓

qiufasuicaiqushangxiayoushuangfazuogeduanmifeng,danchangqiyunxingdefazuobukebimianchuxianmosun;dangfamenchuyuguanbizhuangtaishi,shangyoufazuokenenghuichuxianyidingdeneilou,neiloudejiezhijinrufaqiuzhongqiang。teshushejidexiayoufazuokeyouxiaobimianfaqiuzhongqiangchaoya,yidanfaqiangyalichaoguoxiayouyaliyue 138kpa shi,huijiangxiayoufazuotuiliqiuti,shiyalixiefangdaoxiayouguandaozhong。qiufaanzhuangleyuzhongqiangliantongdefangyaguan,bingjiangfangyaguanyinchudimian,wulunfamenchuyuquankaihuoquanguanweizhi,junkedakaifaqiangguanduanfa,xiefangzhongqiangyali.tongguoshifangzhongqiangyaliyekejiancefazuomifengxingneng。


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