斜置双瓣新型节能止回阀的研究

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1、目录摘要.............................................................................................................................IABSTRACT..................................................................................................................II第一章绪论1.1课题的来

2、源及意义..........................................................................................11.2止回阀的研究现状..........................................................................................11.2.1国内研究现状..........................................................

3、..............................11.2.2国外研究现状........................................................................................41.3课题的提出......................................................................................................51.3.1研究内容...............

4、.................................................................................51.3.2研究方法................................................................................................61.3.3主要创新点....................................................................

5、........................61.4课题的可行性分析..........................................................................................61.5本章小结...........................................................................................................7第二章止回阀结构对比分析2.1止回阀结构及特性分

6、析..................................................................................92.2三类止回阀的结构分析..................................................................................92.2.1旋启式止回阀...........................................................................

7、.............92.2.2升降式止回阀......................................................................................112.2.3蝶式止回阀..........................................................................................142.2.4止回阀特点对比分析.....................................

8、.....................................152.3本章小结............................................................................................