Large-caliber high-temperature liquid metallic sodium valve

Abstract

The invention belongs to valves and particularly relates to a high-temperature operating valve with liquid metallic sodium as a medium, in particular to a valve suitable for the liquid metallic sodiumas the medium and capable of normally opening and closing under high-temperature operating conditions. The large-caliber high-temperature liquid metallic sodium valve comprises a valve body arrangedon a pipeline. The valve body is provided with a valve deck. A bracket is arranged on the valve deck. A fixing ring is arranged outside the bracket. The top end of the bracket is provided with a bearing box. A electric device is arranged above the bearing box. An indicator is arranged below the bearing box. The large-caliber high-temperature liquid metallic sodium valve has the remarkable advantages that the structure is simplified to the maximum extent, the overall structure is compact, connection between components is reduced, the weight is effectively reduced, and the overall anti-shock performance is improved.

Description

technical field [0001] The invention belongs to valves, in particular to valves operating at high temperatures, the medium of which is liquid metal sodium, and in particular to a valve which is suitable for the medium of liquid metal sodium and can be normally opened and closed under high-temperature operating conditions. Background technique [0002] The high-temperature nuclear-grade sodium valve is mainly used in the sodium loop system, and its main function is to effectively transport and cut off the fluid medium sodium in the pipeline. In general, the working pressure of the sodium valve is low, but the working temperature is high (up to 505°C or above), and the chemical properties of the transported medium sodium are extremely active. Therefore, the structural design of the valve, especially the sealing performance, has been put forward. more stringent requirements. DN300 large diameter [0003] The high-temperature liquid metal sodium valve is used as a locking mech...

AI Technical Summary

Problems solved by technology

[0004] The valves in the prior art are almost all designed for water or gas. Due to the high chemical activity of sodium, it is very easy to chemically react with the valve material. If there is undischarged air in the pipeline, the reaction result will be different

Sodium is a metal, so sodium is used as a fluid medium, and its flow characteristics are different from traditional water or gas, so the valve structure cannot copy the existing valve structure

Although sodium is not a metal with a high melting point, the temperature of sodium liquid is much higher than that of water and other fluids. Traditional valves cannot withstand such high temperature fluids.

In summary, the existing valves cannot be applied to sodium fluid due to factors such as chemical reaction, fluid characteristics, and fluid temperature.

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