高压球阀未来发展方向是什么
2023-11-23
What is the future development direction of high pressure ball valve
The size of the friction of the high-pressure ball valve is not only related to the working pressure of the medium, but also to the shape of the ball, seal and structure of the support member, as well as the friction of the sealing seat.The force is also related to the rotation angle of the ball valve.
Torque working under atmospheric pressure difference: When the high-pressure ball valve rotates at 30°, the maximum rotation (90°), the actual ball valve is opened at 80°, and the differential pressure is less than the usual.The pressure difference after closing the ball valve is maximized.As its opening increases, the pressure is fixed and the maximum torque is rotated to 40°.The operation of the high pressure ball valve is divided into two main stages.The ball valve begins to open, and the friction is only caused by the bias force of the sealing member and the static pressure of the working medium on the ball.The high-pressure ball valve has a simple structure and is well sealed, but all the load of the sphere is transmitted to the outlet seal, so that the sealing material can withstand the working load of the spherical medium. This structure is widely used in medium and low-pressure ball valves.
高压球阀密封有金属密封、不锈钢板和石墨复合板密封，用于金属密封和硬密封蝶阀驱动形式，除电动、蜗轮、空气、等。高压球阀安装在管的直径方向上。在高压球阀主体的圆柱路径中，圆盘形蝶板绕轴线旋转，旋转角度在0到90 ° 之间，并且阀门都是打开的，高压球阀球体是弹性的，高压球阀和阀座密封件是金属材料制成的，密封率大，介质本身的压力不会达到密封要求，并且必须施加外力。该阀适用于高温高压介质。高压球阀的球体在介质的压力下悬浮，并且球体产生一定的位移并压在出口端的密封面上，以确保出口端的密封。
目前，高压球阀被用作实现管道系统的排放和流量控制的元件，并已广泛应用于石油，化学，冶金，水力发电等各个领域。在众所周知的高压球阀技术中，密封形式为多密封结构，密封材料为橡胶、聚四氟乙烯等，由于高压球阀结构特性的限制，不适合高温、高压和耐腐蚀、耐磨。高压球阀比传统球阀高。操作轻便，开关不补偿传动机构扭矩的增加，提高了蝶阀的密封性能和寿命。球阀在球体内壁的下端具有弹性凹槽，以实现弹性。当通道关闭时，球形鼓用阀杆密封，球体被释放，球体在球体恢复之前关闭，并且球体在球体和阀座之间恢复，这可以减少密封表面的摩擦和操作扭矩。
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