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Working principle and advantages of stainless steel pneumatic three-way ball valve

Release time: 2018/7/5

适用范围广等优点而深受消费者喜爱。 Stainless steel three-way ball valve is favored by consumers for its advantages such as small fluid resistance, simple structure, small size, light weight, and wide application range. Stainless steel three-way ball valve and flange gate valve are the same type of valve. The difference is that the closing part is a ball. The ball rotates around the center line of the valve body to open and close the valve. Ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. 只需要用气动执行器用气源旋转 90 度的操作和很小的转动力矩就能关闭严密。 Pneumatic three-way ball valve can be closed tightly only by using a pneumatic actuator to rotate the air source by 90 degrees and a small turning torque. The completely equal valve body cavity provides a low resistance, straight flow channel for the medium. Generally speaking, ball valves are most suitable for direct opening and closing. The main features of the ball valve are its compact structure, easy operation and maintenance, suitable for general working media such as water, solvents, acids and natural gas, but also for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene. Today, I will show you some performance characteristics and working principles of stainless steel three-way ball valves in the valve industry.

气动三通球阀

First, the working principle of stainless steel three-way ball valve:  
、开启过程: 1. Opening process:  
、在关闭位置,球体受阀杆的机械施压作用,紧压在阀座上; A. In the closed position, the ball is pressed tightly on the valve seat by the mechanical pressure of the valve stem;  
、当逆时针转动手轮时,阀杆则反向运动,其底部角形平面使球体脱开阀座; B. When the handwheel is turned counterclockwise, the valve stem moves in the reverse direction, and the angular plane at the bottom of the valve moves the ball off the valve seat.  
、阀杆继续提升,并与阀杆螺旋槽内的导销相互作用,使球体开始无摩擦地旋转; C. The valve stem continues to lift and interacts with the guide pin in the spiral groove of the valve stem, so that the ball starts to rotate without friction;  
、直至到全开位置,阀杆提升到极限位置,球体旋转到全开位置。 D. Until the fully open position, the valve stem is lifted to the extreme position, and the ball is rotated to the fully open position.  
、关闭过程: 2. Close process:  
、关闭时,顺时针旋转手轮,阀杆开始下降并使球体离开阀座开始旋转; A. When closed, rotate the handwheel clockwise, the valve stem starts to descend and the ball leaves the valve seat and starts to rotate;  
、继续旋转手轮,阀杆受到嵌于其上螺旋槽内的导销的作用,使阀杆和球体同时旋转 90 B. Continue to rotate the handwheel, the valve stem is affected by the guide pin embedded in the spiral groove on the valve stem, so that the valve stem and the ball are rotated 90 at the same time ;  
、 快要关闭时,球体已在与阀座无接触的情况下旋转了 90 C. When the ball is about to be closed, the ball has been rotated by 90 without contacting the valve seat ;  
、手轮转动的最后几圈,阀杆底部的角形平面机械地楔向压迫球体,使其紧密地压在阀座上,达到完全密封。 D. In the last few turns of the handwheel, the angled plane at the bottom of the valve stem is mechanically wedged to press the ball tightly against the valve seat to achieve complete sealing.
Structural features of stainless steel three-way ball valve:
、上装式结构:对装在管道上的阀门可直接在线检查与维修,能有效减少装置停车,降低成本。 1. Top-loading structure: The valve installed on the pipeline can be directly checked and repaired online, which can effectively reduce the shutdown of the device and reduce costs. This type of valve should generally be installed horizontally in the pipeline;
、启闭无摩擦:完全解决了传统阀门因密封面之间相互摩擦而影响密封的问题; 2. No friction during opening and closing: completely solve the problem that the traditional valve affects the sealing due to friction between the sealing surfaces;
、低扭矩设计:特殊结构设计的阀杆,只需配一个小手把阀门就能轻松启闭; 3. Low-torque design: The valve stem with special structure design can be easily opened and closed with only a small handle;
、楔形密封结构:阀门是靠阀杆提供的机械力,将球楔压到阀座上而密封,使阀门的密封性不受管线压差变化的影响,在各种工况下密封性能都有可靠保证; 4. Wedge-shaped sealing structure: The valve is sealed by the mechanical force provided by the valve stem, which presses the ball wedge against the valve seat, so that the sealing performance of the valve is not affected by the change in the pressure difference of the pipeline. With reliable guarantee
、单阀座设计:消除了阀门中腔介质因异常升压而影响使用安全的问题; 5. Single valve seat design: Eliminates the problem that the medium in the cavity of the valve affects the safety of use due to abnormal pressure rise;
、密封面的自清洁结构:当球体倾离阀座时,管线中的流体沿球体密封面成 360 均匀通过,不仅消除了高速流体对阀座局部的冲刷,也冲走了密封面上的聚积物,达到自清洁的目的。 6. Self-cleaning structure of sealing surface: When the sphere is tilted away from the valve seat, the fluid in the pipeline passes through the sealing surface of the sphere uniformly at 360 , which not only eliminates the high-speed fluid from scouring the valve seat but also flushes away the sealing surface Accumulation, to achieve the purpose of self-cleaning.
Three, stainless steel three-way ball valve has the following advantages :  
、流体阻力小,其阻力系数与同长度的管段相等; 1. The fluid resistance is small, and the resistance coefficient is equal to the pipe length of the same length;  
、结构简单、体积小、重量轻; 2. Simple structure, small size and light weight;  
、紧密可靠,目前球阀的密封面材料广泛使用塑料、密封性好,在真空系统中也已广泛使用; 3. It is tight and reliable. At present, the sealing material of the ball valve is widely used in plastics and has good sealing performance. It has also been widely used in vacuum systems;  
、操作方便,开闭迅速,从全开到全关只要旋转 90 ,便于远距离的控制; 4. Convenient operation, rapid opening and closing, only need to rotate 90 from fully open to fully closed , which is convenient for remote control;  
、维修方便,球阀结构简单,密封圈一般都是活动的,拆卸更换都比较方便; 5. Convenient maintenance, simple structure of ball valve, seal ring is generally movable, and it is more convenient to disassemble and replace;  
、在全开或全闭时,球体和阀座的密封面与介质隔离,介质通过时,不会引起阀门密封面的侵蚀; 6. When fully open or fully closed, the sealing surfaces of the sphere and valve seat are isolated from the medium, and the medium will not cause erosion of the valve sealing surface when the medium passes;
、适用范围广,通径从小到几毫米,大到几米,从高真空至高压力都可应用。 7 , a wide range of applications, from small diameter to several millimeters, large to several meters, from high vacuum to high pressure can be applied.

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