目 录

 

目 录

给排水工程技术毕业论文

 

                                                                                                          

 

 

.........................................................................................................

 

    

   I      

 

摘 要

 

   

                                                                                                                                           

 

 

.........................................................................................................................................

 

    

   I      

ABSTRACT

 

                                                                                                                                  

 

 

.................................................................................................................................

 

    

   I      

 

目 录

 

   

                                                                                                                                           

 

 

.........................................................................................................................................

 

    

   II

      

       

  

绪 论

 

 

                                                                                                                                         

 

 

.....................................................................................................................................

 

    

   1      

1.1

       恒压供水问题的提出

 

                                                                                                 

 

 

................................................................................................

 

    

   1      

1.2

       国内恒压供水系统的现状

 

                                                                                         

 

 

........................................................................................

 

    

   2      

1.2.1

 

 国内恒压供水系统研究状况

 

                                                                             

 

 

............................................................................

 

    

   2      

1.2.2

 

 各类供水系统的比较

 

                                                                                         

 

 

........................................................................................

 

    

   3      

1.3 

       本课题的总体方案

 

                                                                                                     

 

 

....................................................................................................

 

    

   4      

1.3.1

 

 系统的总体布局图

 

                                                                                             

 

 

............................................................................................

 

    

   4      

1.3.2

 

 系统的总体方案

 

                                                                                                 

 

 

................................................................................................

 

    

   4      

1.3.3

 

 本系统的特点

 

                                                                                                     

 

 

....................................................................................................

 

    

   5      

1.4

       本课题的主要工作

 

                                                                                                     

 

 

....................................................................................................

 

    

   6      

 

第二章 恒压供水系统的原理

 

   

                                                                                                  

 

 

................................................................................................

 

    

   7      

2.1

       变频器

 

                                                                                                                          

 

 

.........................................................................................................................

 

    

   7      

2.1.1

 

 变频器的基本原理

 

                                                                                             

 

 

............................................................................................

 

    

   7      

2.1.2

 

 变频器结构电路图

 

                                                                                             

 

 

............................................................................................

 

    

   8      

2.1.3

 

 变频器的配线

 

                                                                                                     

 

 

....................................................................................................

 

    

   9      

2.2

       软起动

 

                                                                                                                          

 

 

.........................................................................................................................

 

    

   14

   

2.2.1

 

 

 

软起动的基本原理

 

 

  

                                                                                           

 

 

........................................................................................

 

    

   14

   

2.2.2

 

 常见故障的排除

 

                                                                                                 

 

 

................................................................................................

 

    

   14

   

2.3 

       文本显示器

 

                                                                                                                  

 

 

.................................................................................................................

 

    

   15

   

 

第三章 供水系统的硬件电路设计

 

   

                                                                                          

 

 

........................................................................................

 

    

   16

   

3.1

       主要器件选型

 

                                                                                                              

 

 

.............................................................................................................

 

    

   16

   

3.1.1

 

 供水泵的选择

 

                                                                                                     

 

 

....................................................................................................

 

    

   16

   

3.1.2

 

 变频器和软起动选型

 

                                                                                         

 

 

........................................................................................

 

    

   16

   

3.2

       供水系统的电气设计

 

                                                                                                 

 

 

................................................................................................

 

    

   16

   

3.2.1

 

 恒压供水思路

 

                                                                                                     

 

 

....................................................................................................

 

    

   16

   

3.2.2

 

 强电驱动线路

 

 1                                                                                                      

 

 

....................................................................................................

 

     17

   

3.2.3

 

 强电驱动线路

 

 2                                                                                                      

 

 

....................................................................................................

 

     19

   

3.2.4

 

 电动阀控制电路

 

                                                                                                 

 

 

................................................................................................

 

    

   20

   

3.2.5 PLC

 

     接线图

 

                                                                                                     

 

 

....................................................................................................

 

    

   20

   

3.2.6

 

 控制线路

 

                                                                                                              

 

 

.............................................................................................................

 

    

   21

   

 

第四章 恒压供水系统软件设计

 

   

                                                                                              

 

 

............................................................................................

 

    

   23

   

4.1

       梯形图的基本绘制规则

 

                                                                                             

 

 

............................................................................................

 

    

   23

   

II