Rail ball valve is the same type of valve as gate valve. In the pipeline, it is mainly used to cut off, distribute and change the flow direction of the medium. It is also a new type of valve widely used in recent years.

軌道球閥適用于石油及石油制品、天然氣、機場、化工、環保等輸送管線和站場上，用作截斷介質流。

Rail ball valve is applicable to oil and petroleum products, natural gas, airport, chemical industry, environmental protection and other transmission pipelines and stations, and is used to cut off medium flow.

工作原理

working principle

開啟過程

Opening process

在關閉位置，球體受閥桿的機械施壓作用，緊壓在閥座上。

In the closed position, the ball is pressed against the valve seat by the mechanical pressure of the valve stem.

當逆時針轉動手輪時，閥桿則反向運動，其底部角形平面使球體脫開閥座。

When the handwheel is rotated counterclockwise, the valve rod will move in the opposite direction, and the angular plane at the bottom will make the ball disengage from the valve seat.

閥桿繼續提升，并與閥桿螺旋槽內的導銷相互作用，使球體開始無摩擦地旋轉。

The valve rod continues to lift and interacts with the guide pin in the spiral groove of the valve rod, so that the ball starts to rotate without friction.

直至到全開位置，閥桿提升到極限位置，球體旋轉到全開位置。

Until it reaches the fully open position, the valve rod is lifted to the limit position, and the ball rotates to the fully open position.

關閉過程

Closing process

關閉時，順時針旋轉手輪，閥桿開始下降并使球體離開閥座開始旋轉。

When the valve is closed, rotate the hand wheel clockwise, and the valve rod starts to drop and the ball starts to rotate when it leaves the valve seat.

繼續旋轉手輪，閥桿受到嵌于其上螺旋槽內的導銷的作用，使閥桿和球體同時旋轉90°。

Continue to rotate the handwheel, and the valve stem is subject to the action of the guide pin embedded in the spiral groove on the handwheel, so that the valve stem and the ball rotate 90 ° at the same time.

快要關閉時，球體已在與閥座無接觸的情況下旋轉了90°。

When the valve is about to close, the ball has rotated 90 ° without contact with the valve seat.

手輪轉動的后幾圈，閥桿底部的角形平面機械地楔向壓迫球體，使其緊密地壓在閥座上，達到完全密封。

During the last few turns of the handwheel, the angular plane at the bottom of the valve stem mechanically wedges the ball to press it tightly against the valve seat to achieve complete sealing.

軌道球閥特點

Features of rail ball valve

啟閉無摩擦

Opening and closing without friction

密封面和閥座密封面采用無摩擦設計，解決了傳統閥門因密封面之間相互摩擦而影響密封的問題，保障閥門密封體壽命。

The non friction design is adopted for the sealing surface and the valve seat sealing surface, which solves the problem that the sealing of the traditional valve is affected by the mutual friction between the sealing surfaces and ensures the service life of the valve sealing body.

上裝式結構

Top mounted structure

采用頂裝式設計，保證閥門內部零件的更換和維修可以通過拆卸閥門閥蓋進行在線檢查與維修，有效減少裝置停車，降低成本；

The top mounted design ensures that the replacement and maintenance of the internal parts of the valve can be carried out online inspection and maintenance by disassembling the valve cover, effectively reducing the shutdown of the device and reducing the cost;

單閥座設計

Single seat design

消除了閥門中腔介質因異常升壓而影響使用安全的問題；

It eliminates the problem that the medium in the chamber of the valve affects the use safety due to abnormal pressure rise;

低扭矩設計

Low torque design

采用具有固定樞軸結構的球閥，保證閥門開關迅捷、低扭矩、易于開啟和關閉；

The ball valve with fixed pivot structure is adopted to ensure the quick opening and closing of the valve, low torque and easy opening and closing;

楔形密封結構

Wedge seal structure

閥門是靠閥桿提供的機械力，將球楔壓到閥座上而密封，使閥門的密封性不受管線壓差變化的影響，在各種工況下密封性能都有可靠保證；

The valve is sealed by pressing the ball wedge onto the valve seat by the mechanical force provided by the valve stem, so that the sealing performance of the valve is not affected by the change of pipeline pressure difference, and the sealing performance is reliably guaranteed under various working conditions;

密封面的自清潔結構

Self cleaning structure of sealing surface

當球體傾離閥座時，管線中的流體沿球體密封面成360°均勻通過，不僅消除了高速流體對閥座局部的沖刷，也沖走了密封面上的聚積物，達到自清潔的目的，進一步提高閥門的密封壽命。

When the ball tilts away from the valve seat, the fluid in the pipeline passes through the sealing surface of the ball at 360 ° evenly, which not only eliminates the local scouring of the valve seat by the high-speed fluid, but also washes away the accumulation on the sealing surface to achieve the purpose of self-cleaning and further improve the sealing life of the valve.