摘要阀门是流体管路的控制装置，它是用来切断和接通管路介质，用于控制流体的压力、方向和流量的装置。本课题设计的阀门为止回阀。它是由阀体、阀盖和阀瓣组成。阀体是阀门中最重要的零件之一，它是用来传输介质的主要流动通道，承受着工作介质的压力、温度、冲蚀和腐蚀，它是阀门总装配的基础。阀盖是阀门中承受压力的重要零件之一，在使用过程中不但承受机制的压力，还承受着阀瓣启闭的冲击压力。阀瓣是阀门中负责启闭的重要零件之一，在使用过程中，通过介质的压力自动启闭，同时，防止介质倒流。本课题设计的阀门它既省去了很多零件（如支架、压板、阀杆摇杆……）、节省了原材料，又方便生产、方便使用，不仅给公司节省了生产时间和成本，同时也为使用者带来了很多方便。49735

毕业论文关键词：阀门；止回阀；阀体； 阀盖；阀瓣

 Abstract The valve control device of the fluid pipeline, it is used to cut and connected to the pipeline medium, pressure, direction and flow devices for fluid control. The design of this subject the valve to check valve.It is by the body, valve cover and valve. The body is one of the most important parts in the valve, it is the main flow channel used to transmit media under the pressure of the working media, temperature, erosion and corrosion, which is the basis of the total valve assembly. The valve cover is one of the important parts of the valve under pressure, not only to withstand the pressure of the mechanism, under the pressure of the valve opening and closing the impact during use. The valve flap is one of the important parts responsible for opening and closing the valve, through the pressure of the media in the course of automatic opening and closing the same time, prevent the media back. The design of the subject valve It eliminates the need for a lot of parts (such as stents, the plate stem rocker ...), save raw materials, and easy production, easy to use, not only the production time and cost savings to the company, but also brought a lot of convenience for the user.

 Key  words: Valve; check valve; body; valve cover; the valve

 目 录

第一章 绪论 1

1.1 研究背景 1

1.2 国内外发展趋势与研究方向 1

1.3 本课题的意义 3

1.4 本课题的研究内容 3

1.5 止回阀的特点 3

1.6用途和性能规范 4

第二章   船用阀门止回阀的设计计算 5

2.1 设计方案分析 5

2.2 阀体的设计和计算 6

2.2.1 阀体的设计及基本内容 6

2.2.2 阀体的结构设计 7

2.2.3 阀体壁厚及其计算 8

2.2.4 阀体中法兰的设计与计算 9

2.2.5 止回阀密封面的选择及比压计算 10

2.2.6 止回阀阀瓣的设计及强度校核 12

2.2.7 阀杆的设计和计算 13

2.3 止回阀的密封设计 18

2.3.1 阀盖与阀体间的密封 19

2.3.2 阀杆填料处的密封 19

第三章 solidworks建模