Abstract：In order to study the impact of different closing methods of pipeline end valves on the water hammer at the end of the pipeline and the overall water hammer pressure under accident conditions, the modeling and calculation of long-distance pressurized water pipelines have the characteristics of simple pipelines, fewer types of solution information, and large amounts of data. Using the characteristic line method to simulate the hydraulic transient process of the water supply pipeline of Shandong Laicheng Power Plant, and analyze the influence of different valve closing laws on the water hammer at the end of the pipeline. The results show that the closing law of the outlet valve has a great influence on the end water hammer. Due to the limitation of the valve itself, a large end water hammer will still be generated when the outlet valve is closed according to the optimal closing law. Other protective mea-sures are required to eliminate or reduce the end. Water hammer. A new type of pipeline water outlet that can effectively reduce water hammer at the end is proposed and verified. Through comparison and verification, it is found that the maximum internal water pressure of the pipeline drops from 128 MPa to 70 MPa after using the new type of water outlet, which can effectively reduce the peak water hammer pressure and prevent Pipeline accidents caused by outlet valve failure or loss of power will further improve the safety and stability of water pipelines, and the cost of transformation will be lower, providing new ideas for water hammer protection at the end of the pipeline.
莫旭颖,郑源*,阚阚,张海晟. 不同关阀规律与出水口形式对管路水锤的影响[J]. 排灌机械工程学报, 2021, 39(4): 392-396.
MO Xuying,ZHENG Yuan*,KAN Kan,ZHANG Haisheng. Influence of different valve closing rules and outlet form on pipeline water hammer. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(4): 392-396.
