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Research on New Measure of Running in a Large Pumping Station for Drainange Over the Hump

Author: ChaiLiNa
Tutor: LiuJingZhi；LiJiangYun
School: Wuhan University
Course: Water Resources and Hydropower Engineering
Keywords: Super hump Start Stop the pump Compressed air Sluice
CLC: TV675
Type: Master's thesis
Year: 2005
Downloads: 69
Quote: 0
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Abstract


Since the 1950s and 1960s, China's coastal areas, the construction of hundreds of large drainage pumping station, multi-outlet conduit to siphon form. The flow channel including the ascent stage, at the top of the hump segment and decreased segment, apply to a dike drainage pumping station. Hump ??at the top elevation slightly higher than the maximum out of the pool design water level can play a retaining a vacuum breaker valve on the destruction of the top of the vacuum in the form of drying up, shut-off measures water flow without resistance, reliable operation . However, in recent years, on the one hand, due to the changes of the hydrological conditions of rivers, the water level has increased annually, making the ultra Water_Level frequently appear; the other hand, as the socio-economic development, drainage area, drainage improvement in the standards; to reduce waterlogging disasters, The urgent requirement drainage in super Water_Level boot. In this case, we must study and solve the problem of super Water_Level unit startup and accidents stop the pump, in order to ensure the safety of the equipment in pumping station in the the super Water_Level run under. To this end, this paper established a complete set of processing ultra-hump state pumping station run transformation measures. The hump running large drainage pumping station super drying up first analysis and evaluation pointed out that the technical problems of the traditional the interrupters way in concrete application super hump state, the use of compressed air technology new loose-leaf gates fast independent or joint use of the implementation unit startup, shutdown, and a series of technical measures to prevent the river water. The theoretical analysis of motor pump system startup and pumping accidents in the transition process, axial flow pump and flow channel characteristics of the transition process, the establishment of a mathematical model to describe the process of starting and stopping the pump. Be programmed to calculate, draw the pump device in the transition process flow, head and other parameters change over time, and start exhaust design, compressed air shut-off device, loose-leaf fast gate device. A live page fast gate pumping station at the same time on separate the shutdown transition process analysis and calculation, the mathematical model of the gate falling motion. Last example to Hubei jiayu I pier pumping station, the compressed air shut-off device under the super Water_Level calculation of the start and emergency stop pump process, and the loose-leaf fast gate start and accident in ultra hump state stop pump Kai doors and the calculation of the whereabouts of the process, a compressed air device and loose-leaf the fast gate device design for engineering design.

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CLC: > Industrial Technology > Hydraulic Engineering > Water control,hydraulic structures > Water, water diversion project > Pumping station
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