Several Problems Study Of Long Distance Pipeline Project

In this paper, we take several engineering problems during the design and operation period in long-distance water projects in the region for example, analyzing the selection of long-distance water conveyance project plan, calculate water pipe head loss, long-distance water hammer protection issues as well as issues related to long-range projects Gravity Water safe operation.(1) Based on practical engineering can be used in planning and design is analyzed by three kinds of water conveyance project, under the premise of no water requirements in the middle, the water pump pressurized water than the water pump with high pool water solution pump head is decreased obviously, the operation cost, reduce the cost and supply of water, give priority to choose plan of the layout.(2) with the same kind of practical engineering pipeline, the same conditions as the background, comparing different frictional head loss formula, recommend the nodular cast iron pipe, steel pipe and glass steel pipe is applicable formula of frictional head; The same pipes of different roughness coefficient values calculated frictional head loss comparison, induce and roughness coefficient value of the real closer. In central and southern Ningxia three typical urban and rural drinking water safety project of long distance water conveyance project as an example, detailed calculating the value of the local water head loss, calculates:the value of the local head loss is 10%-10% of frictional head loss.(3) Analysis of long-distance water conveyance pipeline gravity several form and harm of water hammer in practical engineering, for example, through calculation and analysis, long distance water conveyance pipeline water hammer pressure and gravity valve closing time, the key to ensure safe operation of the pipeline valve closing time is reasonable.(4) In long distance gravity water pipe tube as an example, analyzes the main reasons for tube, and puts forward the gravity water pipe to avoid long tube is the key to solve the problem of good water filling exhaust, according to the requirements stated in the specification pipe section down, test the waters, etc, to ensure the safe operation of the pipeline.