Double-seal ring for high-temperature high-pressure pipelines

Abstract

The invention discloses a double-seal ring for high-temperature high-pressure pipelines, which implement double-stage sealing through two valve cores. The joint between a cavity inner wall and an inlet tail end is provided with a first valve seat, and a second valve seat is installed on the cavity inner wall above the first valve seat; the outlet tail end is positioned above the second valve seat; the double-seal ring comprises a second valve core and a first valve core; the first valve core is fixedly connected with the bottom end of an inner valve stem; the second valve core is fixedly connected with the bottom end of an outer valve stem; the inner valve stem is slidablely installed in the outer valve stem; the top end of the outer valve stem is provided with a disk spring seat; the disk spring seat comprises a vertical rod which is used for extending into the outer valve stem and contacting the top end of the inner valve stem; the top end of the vertical rod is a flange which is positioned outside the outer valve stem and has larger radial dimension than the inner valve stem; a disk spring, of which the radial dimension is greater than that of the inner valve steam and less than or equal to that of the flange, is sheathed on the vertical rod; a screw, which contacts the top end of the disk spring seat flange, is assembled inside the cavity; and the screw moves in the axial direction under the driving action of a grip.

Description

technical field [0001] The invention relates to a valve for high-temperature and high-pressure pipelines, which is specifically used for assembling on pipelines conveying high-temperature and high-pressure media to realize on-off of the pipelines. Background technique [0002] Existing valves on pipelines for transporting high-temperature and high-pressure media include a valve body, and the two sides of the valve body are respectively provided with a medium pipeline inlet and a medium pipeline outlet; the medium pipeline inlet is located at the end of the valve body and the medium pipeline outlet is located at the end of the valve body Respectively, the inlet end and the outlet end; the inlet end and the outlet end communicate with the cavity opened in the vertical direction in the center of the valve body; [0003] In order to realize the connection and cut-off between the inlet of the medium pipeline and the outlet of the medium pipeline, the current valve is a primary se...

AI Technical Summary

Problems solved by technology

[0003] In order to realize the connection and cut-off between the inlet of the medium pipeline and the outlet of the medium pipeline, the current valve is a primary seal, that is, it relies on a valve core to close or cut off the flow channel between the inlet of the medium pipeline and the outlet of the medium pipeline; for high-temperature and high-pressure medium pipelines Generally speaking, this kind of valve needs to achieve reliable closing and cutting process by increasing process precision, material quality and sealing material grade, its cost is very high, and reliability is also low

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