Safe shell insulated butterfly valve
A containment and butterfly valve technology, which is applied in the direction of lift valves, valve details, valve devices, etc., can solve the problems of long closing time of containment isolation butterfly valves and failure to meet system safety requirements, etc., and achieve excellent radiation resistance and long service life , easy maintenance effect
Inactive Publication Date: 2009-11-11
JIANGSU SHENTONG VALVE +1
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Problems solved by technology
[0003] In order to overcome the shortcomings of the existing containment isolation butterfly valve driven by electric devices, such as long closing time and failure to meet system safety requirements, the present invention provides a containment isolation butterfly valve
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[0012] Such as figure 1 , 2 As shown, a containment isolation butterfly valve includes a valve body 17 and a driving device. The driving device includes a fork slider mechanism, a spring return mechanism and a transmission mechanism. , the main shaft 7, the main shaft 7 is supported in the transmission mechanism box 1, one end of the main shaft 7 is equipped with the worm gear 3, the connection plate 6, the electromagnetic clutch 5 in sequence, the bearing 4 is installed between the worm gear 3 and the main shaft 7, and the electromagnetic clutch 5 is connected through the The disk 6 is fixedly connected to the worm wheel 3 with screws, and the worm 2 matched with the worm wheel 3 is installed in the transmission mechanism box 1 and extends out of the box body, and the other end of the main shaft 7 is milled with a tooth shape; 9 is connected with the valve body 16 by bolts, and the shift fork 10 is supported on the case body 9 of the shift fork slider mechanism. Slide in th...
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The invention provides a safe shell insulated butterfly valve which comprises a valve body and a driving device. The driving device comprises a shifting fork slider mechanism, a spring resetting mechanism and a transmission mechanism, wherein the transmission mechanism comprises an electromagnetic clutch, a connecting disc, a worm wheel, a worm and a main shaft; the main shaft is supported in a box body of the transmission mechanism, and the worm, the connecting disc and the electromagnetic clutch are sequentially mounted at one end of the main shaft; a bearing is mounted between the worm wheel and the main shaft, the electromagnetic clutch is fixedly connected with the worm wheel by the connecting disc with screws, and the worm matched with the worm wheel is mounted in the box body of the transmission mechanism and extends out of the box body; teeth are milled on the periphery of the other end of the main shaft, and racks engaged with the teeth on the main shaft are milled at the lower part of a piston rod of the spring resetting mechanism. The invention has the advantages of simple product structure and reliable action, can rapidly close within 1 to 3 seconds, and a hard sealing structure is adopted so as to have favorable irradiation-resistant performance, convenient maintenance and long service life.
Description
technical field [0001] The invention relates to a valve, in particular to a containment isolation butterfly valve used in a pressurized water reactor nuclear power plant. Background technique [0002] The containment isolation butterfly valve currently used in pressurized water reactor nuclear power plants, such as the containment isolation valve produced by Jiangsu Shentong Valve Co., Ltd. for the first phase of Qinshan Nuclear Power Plant, has an electric drive device, and its closing time is between 5 and 10 seconds. It cannot meet the requirement of fast shutdown within 1 to 3 seconds required by the present million-kilowatt unit nuclear power plant. Contents of the invention [0003] In order to overcome the shortcomings of the existing containment isolation butterfly valve driven by an electric device, such as long closing time and failure to meet system safety requirements, the present invention provides a containment isolation butterfly valve. [0004] The technic...
Claims
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IPC IPC(8): F16K1/226F16K27/02F16K31/60F16K31/36
Inventor 张逸芳徐晓冬牛允杰陆平沈捷美默静飞徐厚明张庆奎邹其军孙雪萍陆东华
Owner JIANGSU SHENTONG VALVE