Water-cooling valve stem structure of 1500-DEG C superhigh temperature valve

Abstract

A water-cooling valve stem structure of a 1500-DEG C superhigh temperature valve comprises a valve stem. The valve stem is of reduction structure and provided with a single-circulating water cooling structure. The valve stem is formed by fixedly connecting a valve stem body and a valve stem joint, and the external portion of the valve stem body is of reduction structure composed of a large-diameter section and a small-diameter section which are connected through a transition section. Cooling water can flow in the space formed by the valve stem body, a valve stem bush, an inner water-cooling pipe and the valve stem joint to form a single complete cycle of a water cooling system. An O-shaped ring in the inner water-cooling pipe prevents water from entering an outlet from the bottom of the inner water-cooling pipe and prevents water at the outlet from reaching the inlet from a sealed position of the O-shaped ring, so that water cooling in a single complete cycle is formed. The valve stem can safely and reliably operate under the working condition of superhigh temperature of 1500 DEG C through thermodynamic calculation of heat transfer.

Description

technical field [0001] The invention belongs to the technical field of valve manufacturing, and relates to a structure of a valve stem in contact with a medium used in a valve under ultra-high temperature working conditions exceeding the melting temperature of metal, specifically a water-cooled structure that can meet the ultra-high temperature medium of 1500°C stem structure. Background technique [0002] For high-temperature valves with a lower temperature level of around 800 °C, there are valves made entirely of non-metal at home and abroad, but due to the properties of non-metal materials, they cannot meet the requirements of rapid cooling, rapid heating and high-pressure working conditions. At home and abroad, there are water-cooling measures to make the valve work normally, but this will cause too much heat loss of the medium, and the medium at the outlet of the valve will not meet the test requirements, so it cannot be used. According to the current domestic and f...

AI Technical Summary

Problems solved by technology

[0002] For high-temperature valves with a lower temperature level of around 800°C, there are valves made entirely of non-metallic materials at home and abroad, but due to the properties of non-metallic materials, they cannot meet the requirements of rapid cooling, rapid heating and high-pressure working conditions.

At home and abroad, there are water-cooling measures to make the valve work normally, but this will cause too much heat loss in the medium, and the medium at the outlet of the valve will not meet the test requirements, so it cannot be used.

According to the current domestic and foreign relevant data, in the field of high temperature resistance, there is no valve that can work safely under the conditions of 1500 °C ultra-high temperature, high pressure and high speed.

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