储存液体的箱体类产品密封性检测装置的设计

摘要

气密性检测对工业产品的重要性不言而喻，具有举足轻重的作用。由于塑胶相对金属具有质轻，成本低以及加工效率高效等特点广泛用于到工业产品中，尤其对于复杂箱体类产品优势更加突出，具有明显的经济效益。本文介绍一款针对塑胶箱体类产品基于差压法检测技术的气密性性检测，采用储气罐提供稳定压力的气体对被测箱体进行充气，同时采用高精度压力传感器对箱体压力进行实时检测，保压一段时间后检测箱体压力是否有衰减，将待测产品压力衰减值与样品衰减值进行比对，以此判定箱体密封性是否满足要求。整个检测装置选用AT89S52单片机控制模块，高精度压力传感器以及LCD液晶屏显示，报警提醒装置等，利用PID控制及其PROTUES软件仿真对装置进行调试及仿真模拟，验证。实验结果表明：该套利用差压法为检测原理，选用智能控制元件，可以自行结果判定的气密性检测装置符合要求，能够满足生产需求，同时也是对塑胶箱体类产品气密性测试的方法的进一步探索和创新，具有实际生产意义。

[关键词]　气密性；差压法；压力衰减；机械设计；PID控制

Abstract

Air tightness detection is of great importance to industrial products. Due to its light weight, low cost and high efficiency, plastic is widely used in industrial products, especially for complex box products, which has obvious economic benefits. In this paper, we introduce a plastic enclosure for products based on the differential method of detecting technology of air tightness test, using propane tanks to provide stable pressure gas measured gas box body, at the same time with high precision pressure sensor to real-time detection of casing pressure, pressure after a period of time to detect casing pressure attenuation, the product under test pressure attenuation value attenuation value compare to the sample, to determine whether the box sealing meet the requirements. The whole testing device selects AT89S52 single chip computer control module, high-precision pressure sensor, LCD LCD display, alarm and reminder device, etc. The device is debugged and simulated by PID control and PROTUES software simulation, and verified. The experimental results show that the air tightness detection device, which can be judged by its own results by using differential pressure method as the detection principle and selecting intelligent control components, meets the requirements of production, and is also a further exploration and innovation of the air tightness testing method of plastic box products, which has practical production significance.

Keywords: Air Tightness、Differential pressure method、The pressure attenuation、Mechanical design、PID control

目 录

第1章 绪论 2

  1.1 研究的背景和意义………………………………………………………..…2

  1.2气密性检测技术国内外研究现状……………………………………………2

  1.3研究的内容及计划安排………………………………………..…………..…3

1.3.1研究的主要内容………………………………………………………..…3

1.3.2研究的计划安排………………………………………………………..…4

第2章 气密性检测系统的主要总体设计 5

2.1气密性检测方法的优劣势分析 5

2.1.1差压法气密性检测方案的确定 5

2.1.2测试原理及主要工艺流程的确定 5

2.1.3预测可能存在的技术难题以及解决对策的提出 6

第3章 机械装置及电气控制系统的实现 7

3.1机械装置的参照选择 7

3.1.1 测试机构的整体结构 7

3.1.2 测试设备的加工、制作和安装调试 8

3.2电气控制系统主要元件的选型和控制系统的实现 8

3.2.1 系统硬件总图 8

3.2.2 元件选型 9

3.2.3软件部分的实现……………………………………………………….…11

第4章 气密性检测装置的仿真调试及结果 13

4.1Proteus仿真 13

4.2Proteus仿真实验结果 13

第5章 总结及改进建议 15

5.1 总结 15

5.2 不足及改进建议 15

参考文献…………………………………………………………………………….16

致谢…………………………………………………