考虑爆管工况的长距离供水工程水锤防护研究.

During long distance water delivery project of pumping station, water hammer protection scheme of conventional pump is usually based on the pumping accident to set up the water hammer protection measures, the influence of buried pipe burst to the transition process of water delivery system is seldom considered. When a point in the downstream pipeline occurs pipe burst, severe water hammer drop can induce secondary or serial pipe burst accident. In this paper, the physical process of buried pipe burst in practical engineering was analyzed and a reasonable mathematical model was established based on the working principle of the overflow stable pressure tower. The pumping accident and the pipe burst accident were considered in the design of water hammer protection scheme and a protection scheme combining the air tank and the air valve after the pump was put forward. Combined with a practical water delivery project, this paper compared the influence of different protection schemes to the protection effect of water hammer in the case of pump stopping and pipe burst. The results show that the conventional water hammer protection scheme can effectively eliminate the harm of pump stopping accident, the combined protection scheme of air tank and air valve can effectively prevent the transmission of the pressure drop wave of the water hammer in the pipe burst accident and avoid the occurrence of the second pipe burst accident. [ABSTRACT FROM AUTHOR]