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热词
    • 3. 发明授权
    • Fluid flow control valve, principally of the ball or plug type
    • 流体流量控制阀,主要是球或塞式
    • US4332370A
    • 1982-06-01
    • US172022
    • 1980-07-24
    • William F. Williams
    • William F. Williams
    • F16K5/02F16K5/06F16K41/16F16K31/44
    • F16K41/16F16K5/0285F16K5/0694Y10T137/1797
    • A ball or plug valve comprises a ball or plug having a through bore which is rotatable in a metal body to control the flow of fluid through a passage in the body. The ball can be rotated from the exterior of the body by means of a metal stem which is rotatably received in an opening in the metal body. The opening is stepped so as to define a first shoulder which faces the passage in the body, and the stem is correspondingly stepped to define a second shoulder which faces the first shoulder. Under normal operation of the valve, the shoulders are spaced apart slightly and a sealing ring is interposed therebetween. In the event that the sealing ring fails, the pressure of fluid in the passage presses the shoulder on the stem into contact with the shoulder on the body to create a metal-to-metal seal which prevents the escape of fluid to atmosphere through the opening. To make the seal reliable, the shoulders are shaped so that they contact each other only over the outer periphery of the stem shoulder. For example, the shoulders can be mutually tapered, or one of the shoulders can have a raised rim on its outer periphery.
    • 球或塞阀包括具有通孔的球或塞,该通孔可在金属体中旋转以控制流体通过体内的通道。 球可以通过可旋转地容纳在金属体的开口中的金属杆从主体的外部旋转。 开口是阶梯形的,以限定面向主体中的通道的第一肩部,并且杆相应地台阶以限定面向第一肩部的第二肩部。 在阀的正常操作下,肩部稍微间隔开,密封环插入其间。 在密封环失效的情况下,通道中的流体的压力将杆上的肩部压紧到与身体上的肩部接触以产生金属对金属的密封,其防止流体通过开口泄漏到大气中 。 为了使密封件可靠,肩部的形状使得它们仅在柄肩的外周上彼此接触。 例如,肩部可以是相互锥形的,或者其中一个肩部可以在其外周上具有凸起的边缘。