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上海沪工阀门厂(集团)有限公司 | 2010-12-13

四、输气管线直埋全焊接球阀的技术特点

城市次高压、高压天然气管道要求管线阀门必须结构简单、启闭迅速、流体阻力小、密封性能好、耐腐蚀,维护保养简单、运行可靠和使用寿命长。张家港港华燃气公司曾建设的高压管线(2.5MPa)中采用了美国卡麦隆(CAMERON)公司生产的 DIN500 公称压力为 50MPa 的直埋全焊接全通径球阀,很好地解决了国内一般管道球阀经常出现的内漏、阀杆泄漏、阀门外表面腐蚀及维护保养难的问题.

一、全焊接球阀的结构特点

1.1 全焊接式结构

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1.2 框轴固定球设计

QIUFAGENJUQIUTIXINGSHIKEFENWEIGUDINGQIUHEFUDONGQIULIANGZHONG。GUONEICHANPINYIBANCAIYONGDEFUDONGQIUJIEGOU,QIUTIZAIJIEZHIDEYALIZUOYONGXIAQIUTIJINYAZAICHUKOUDUANDEMIFENGMIANSHANG,DADAOFENGBIMUDE,YIDANFATIJINCHUKOUYALICHAJIAODASHI,YINNIUJUHENDAWANGWANGDAKAIHENNAN。QUANHANJIEQIUFACAIYONGLEGAOQIANGDUDEDUANGANGFAGAN,YOUWAIBAO PTFE(JUSIFUYIXI)DEBUXIUGANGZHOUCHENGZUOZHICHENGZHUANDONGPINGHUAJINGQUE。YOUYUSHUZHOUZHICHENGDEFAGANKEYIXISHOUGUANXIANJIEZHIYALICHANSHENGDETUILI,BINGQIEKEYIJIANSHAOFAQIUHEFAZUOZHIJIANDEMOCA,YINCIJISHIZAIQUANYACHAXIA,CAOZUOAOMENDENIUJURENGRANYAOQIUHENDI,QIUFAKAIGUANZIRU。

1.3 旋转阀座设计

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1.4 阀杆及二级阀座紧急注脂密封

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1.5 阀腔压力的自动内部泄放及双隔断中腔放压

QIUFASUICAIQUSHANGXIAYOUSHUANGFAZUOGEDUANMIFENG,DANZHANGQIYUNXINGDEFAZUOBUKEBIMIANCHUXIANMOSUN;DANGFAMENCHUYUGUANBIZHUANGTAISHI,SHANGYOUFAZUOKENENGHUICHUXIANYIDINGDENEILOU,NEILOUDEJIEZHIJINRUFAQIUZHONGQIANG。TESHUSHEJIDEXIAYOUFAZUOKEYOUXIAOBIMIANFAQIUZHONGQIANGCHAOYA,YIDANFAQIANGYALICHAOGUOXIAYOUYALIYUE 138KPa SHI,HUIJIANGXIAYOUFAZUOTUILIQIUTI,SHIYALIXIEFANGDAOXIAYOUGUANDAOZHONG。QIUFAANZHUANGLEYUZHONGQIANGLIANTONGDEFANGYAGUAN,BINGJIANGFANGYAGUANYINCHUDIMIAN,WULUNFAMENCHUYUQUANKAIHUOQUANGUANWEIZHI,JUNKEDAKAIFAQIANGGUANDUANFA,XIEFANGZHONGQIANGYALI.TONGGUOSHIFANGZHONGQIANGYALIYEKEJIANCEFAZUOMIFENGXINGNENG。


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