PIANC Smart Rivers 2022

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Abstract : *(250~1000 words)

Combining the technology advantages of both ship lock and ship lift, hydro-floating ship lift (HFSL) uses water energy as the driving power and security measures. As the core equipment of HFSL’s water-driven system, the performance of the cone valve directly affects the operation safety and efficiency of this kind of ship lift. Given the cavitation of the cone valves and based on the hydraulics tests of the existing industrial valves, a pre-valve aeration system of the cone valve was put forward in this paper, which can effectively inhibit cavitation damage of the cone valve and the pipeline behind the valve. The aeration system is mainly composed of three parts, i.e., the valve seat, supplemental air pipes, and the valve sleeve. The specific arrangement is that a suitable number of small ventilation holes are built evenly spaced along the circumferential direction and extended to the atmosphere by two supplemental air pipes. Utilizing the pressure difference between the valve and atmosphere, the aeration system can achieve the purpose of self-aeration or forced aeration. The aeration concentration of the flow depends on the previous hydraulic experiments. The results show that the cavitation of the cone valves could be basically inhibited, and vibration of the cone valves was declined obviously by the aeration system. It is worth noting that the aeration system is arranged in a simple way, which can reduce the cavitation damage, ensure the safe operation of the cone valves, and improve the efficiency of HFSL. At the same time, compared to the previous complex technologies, this aeration system is easier to maintain and considerably reduces the costs and construction difficulty.

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