压差放大式逆止阀的研制及工程应用

发布时间：2018-06-23 04:03

本文选题：输引水工程 + 压差放大　；参考：《长江科学院院报》2017年06期

【摘要】：输引水工程线路长,沿线地下水位复杂多变,防渗结构存在抗浮稳定问题,一般采用排水减压措施进行处理,具有单向排水功能的逆止阀是最为可行的选择,但现有逆止阀产品仍存在安装方向要求严、施工精度要求高、启闭不灵活、长期性能差等不足。针对以上问题,结合逆止阀应用条件,从启闭原理、止水方式和防淤堵等方面入手,研发了压差放大式的新型逆止阀;逆止阀的开启和关闭只通过压差控制,无需任何外力,无方向性要求;采用了压差放大式结构和弧形接触止水方式,提高了启闭的灵敏性和可靠性;设计了专门的防淤堵结构并考虑了产品的疲劳破坏问题,保障了产品的长期性能。逆止阀可作为渠道、堤防和河道的护坡、大坝水位波动区、输水隧洞、航闸底板及其他涉水建筑物等工程防渗结构的排水减压措施。
[Abstract]:Because of the long route, complicated and changeable underground water level along the water transmission and diversion project, the anti-floating stability problem exists in the anti-seepage structure, the reverse stop valve with unidirectional drainage function is the most feasible choice, and the drainage decompression measures are generally used to deal with it. However, the existing reverse stop valve products still have some shortcomings, such as strict installation direction, high construction precision, not flexible opening and closing, poor long-term performance and so on. In view of the above problems, combining with the application conditions of the reverse stop valve, starting from the aspects of the principle of opening and closing, the way of stopping water and preventing silting, a new type of reverse stop valve with pressure differential amplification type is developed, and the opening and closing of the reverse stop valve is controlled only by differential pressure without any external force. The structure of pressure differential amplification and arc contact sealing are adopted to improve the sensitivity and reliability of the opening and closing, and the special silt prevention structure is designed and the fatigue failure problem of the product is considered to ensure the long-term performance of the product. The reverse stop valve can be used as a decompression measure for seepage prevention structures of channel, embankment and river course, water level fluctuating zone of dam, water conveyance tunnel, bottom slab of navigation lock and other wading structures.
【作者单位】：长江科学院水利部岩土力学与工程重点实验室;长江科学院国家大坝安全工程技术研究中心;
【基金】：国家“十二五”科技支撑计划项目(2011BAB10A04,2011BAB10A06)
【分类号】：TV223.4;TV67

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