Stop valve suitable for high-temperature fluid

Abstract

The invention discloses a stop valve suitable for high-temperature fluid, and belongs to the field of stop valves, the stop valve suitable for the high-temperature fluid comprises a valve body, the temperature of the high-temperature fluid is conducted to a deformation memory metal ring through a heat conduction rod, and thus the deformation memory metal ring deforms; the deformed deformation memory metal ring drives the linkage ring to move upwards, the linkage ring moving upwards synchronously drives the second rubber ring to move upwards, and the second rubber ring moving upwards continuously compresses the space at the upper end of the annular cavity. Air at the upper end of an annular cavity is extruded by the second rubber ring and then is matched with an annular through groove to flow into an inner cavity of an annular elastic air bag, so that the annular elastic air bag expands, the expanded annular elastic air bag tightly wraps a valve rod, and the sealing effect between the valve rod and a sealing cylinder is improved, and the possibility that high-temperature fluid and associated air in the inner cavity of the valve body overflow from the outside is reduced.

Description

technical field [0001] The present invention relates to the field of shut-off valves, and more particularly, to a shut-off valve suitable for high-temperature fluids. Background technique [0002] The globe valve, also known as the cut-off valve, is one of the most widely used valves. The reason why it is popular is that the friction between the sealing surfaces during the opening and closing process is small, it is more durable, the opening height is not large, and it is easy to manufacture. , easy maintenance, not only suitable for medium and low pressure, but also suitable for high pressure, the closing principle of the globe valve is to rely on the pressure of the valve stem to make the sealing surface of the valve disc and the sealing surface of the valve seat closely fit to prevent the flow of the medium. It has been stipulated that the flow direction of the globe valve shall be from top to bottom, so it is directional during installation. The structure length of the g...

AI Technical Summary

Problems solved by technology

[0003] In the process of some existing globe valves working on high-temperature fluid, when the globe valve is opened, the cavity of the globe valve is filled with high-temperature fluid, and the space in the cavity of the globe valve remains constant all the time. The higher the temperature, the higher the internal air pressure, and the high-temperature fluid and associated gas in the inner cavity of the globe valve are easy to overflow to the outside due to the influence of air pressure.

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