阀门的作用是控制流体的流动,现有的阀门结构和制造工艺复杂,生产成本较高,使用操作不方便。因可动部分磨损后不能进行自动补偿而导致闸不死和渗漏则是传统阀门的最大通病,因而易损坏不耐用。双弧片闸阀的结构和制造工艺简单,成本低廉,可动部分磨损后能进行自动补偿,因而密封性 The role of the valve is to control the flow of fluid, the existing valve structure and manufacturing process is complex, high production costs, the use of inconvenient. Due to the movable part of the wear and tear can not be automatically compensated and lead to sluggishness and leakage is the traditional valve of the most common problem, so easy to damage not durable. Double-arc gate valve structure and manufacturing process is simple, low cost, movable part of the wear and tear can be automatically compensated, so the sealing