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发明公开
CN106370243A 孔口装置及将孔板从其内移除或者安装在其内的方法 有权 转让

孔口装置及将孔板从其内移除或者安装在其内的方法
摘要：
本发明提供了一种孔口装置，该孔口装置包括本体、安装在本体中的孔板以及位于本体内的孔板转移通道。孔板转移通道包括肩部，并且孔板能够在该通道之中移动。另外，该孔口装置包括布置在孔板转移通道中的密封组件。该密封组件包括密封插入件，该密封插入件包括第一部段和第二部段。另外，该密封组件包括构造成在第二部段与孔板转移通道之间形成第一液密屏障的第一密封构件。另外，该密封组件包括构造成在肩部与第一部段之间形成第二液密屏障的第二密封构件。再者，该密封组件包括在孔板转移通道内位于第一液密屏障与第二液密屏障之间的副腔室。本发明还提供一种用于将孔板从孔口装置内移除或者将孔板安装在孔口装置内的方法。
摘要（英）：

The invention discloses a double block and bleed system for an orifice fitting.An orifice fitting includes a body, an orifice plate mounted in the body, and an orifice plate transfer passage within the body. The orifice plate transfer passage includes a shoulder, and the orifice plate is movable through the passage. In addition, the orifice fitting includes a sealing assembly disposed in the orifice plate transfer passage. The sealing assembly includes a sealing insert including a first section and a second section. In addition, the sealing assembly includes a first sealing member configured to create a first fluid tight barrier between the second section and the orifice plate transfer passage. Further, the sealing assembly includes a second sealing member configured to create a second fluid tight barrier between the shoulder and the first section. Still further, the sealing assembly includes a subchamber within the orifice plate transfer passage between the first fluid tight barrier and the second fluid tight barrier.

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