JINShi-peng.Application Research of Improved Closed Water Test Detection Device for Non-pressure Pipelines[J].China Water & Wastewater,2023,39(20):115-119.
Application Research of Improved Closed Water Test Detection Device for Non-pressure Pipelines
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第20期
Page:
115-119
Column:
Date of publication:
2023-10-17
- Keywords:
- closed water test; non-pressure pipelines; test detection; resolution; accuracy
- Abstract:
- Closed water test is an important method for quality control of non-pressure pipelines, while it has some problems, such as low resolution of the measuring instrument, large error, difficulty in grasping the contact between the front end of the measuring instrument and the liquid surface, difficulty in keeping high repeatability, and inability to consistent testing. In view of the above problems, an improved closed water test detection device for non-pressure pipelines is developed. The device uses a combination of floating ball, light metal rod, tripod, casing and dial indicator to test, and can observe the change of the bottom liquid level in real-time and accurately characterize the small changes. Through designing the related tests, it is consinered that the improved test device has a greater improvement than the conventional test device. The relative error of the improved test device is less than 0.13%, the linear correlation is 99.5%, and the standard deviation is 0.2 mm, which is closer to the theoretical change value. The improved test device has improved the resolution, small dispersion and high accuracy, and has been successfully applied in the engineering inspection site with good results.
Last Update:
2023-10-17