A kind of automatic release mechanism of high temperature melt and control method thereof

Abstract

The invention discloses a fully automatic release mechanism for high-temperature molten matter and its control method. The release mechanism of the invention includes a temporary storage container; the upstream of the temporary storage container is connected to a low-pressure container equipped with a melting furnace through an upstream release pipeline, and A protective gate valve and an upstream main sealing valve are sequentially provided on the upstream release pipeline from the low-pressure container to the temporary storage container; a downstream release pipeline is provided downstream of the temporary storage container, and a melt release pipe is provided on the downstream release pipeline. valve and a downstream main sealing valve, the melt release valve is arranged on a side close to the temporary storage container, and the downstream main sealing valve is arranged on a side away from the temporary storage container; the temporary storage container and its The downstream devices are all installed in the bottom high-pressure container; the temporary storage container communicates with the low-pressure container, the bottom high-pressure container and the pressure source respectively through pressure balance pipelines. The invention breaks through the difficulty of transferring high-temperature molten matter from a low-pressure environment to a high-pressure environment.

Description

technical field [0001] The invention belongs to the technical field of mechanical automation, and in particular relates to a fully automatic release mechanism for high-temperature molten matter and a control method thereof. Background technique [0002] In the study of the mechanism of severe accidents of nuclear reactors, when conducting experiments on the interaction between core melt and coolant, it is necessary to release high-temperature melt (≥1000°C) from an atmospheric melting furnace into a water pool in a pressure vessel for testing. During the transfer process, if the high-temperature molten material is in contact with pipes and valves for a long time, it will cause problems such as high-temperature yield of steel components, failure of pressure-bearing seals, and inability of valves to operate; at the same time, high-temperature molten material contacts steel components. When it is on the wall, it will form a hard shell to cover the wall after solidification, whi...

AI Technical Summary

Problems solved by technology

During the transfer process, if the high-temperature molten material is in contact with pipes and valves for a long time, it will cause problems such as high-temperature yield of steel components, failure of pressure-bearing seals, and inability of valves to operate; at the same time, high-temperature molten material contacts steel components. When the wall surface is closed, a hard shell will be formed to cover the wall surface after solidification, which will greatly affect the difficulty of movement and pressure sealing at the valve.

[0003] In the face of these technical difficulties, the current experimental techniques are divided into two categories: one is to choose to reduce the pressure in the bottom pressure vessel to normal pressure, without setting a release mechanism, and the high-temperature melt is directly released from the melting furnace into the bottom experimental vessel. This design does reduce the difficulty of release, but it makes the system pressure conditions of the bottom experimental vessel unable to simulate the actual accident conditions well, and does not have the function of pressure adjustment; the other is to choose to put the melting furnace into the In the pressure vessel, when the melt is released, the upper and lower pressure vessels are connected, and the time and space for the melt to contact the release mechanism are shortened as much as possible. However, this design allows the steam and explosion shock waves generated in the bottom vessel to spread to the top vessel. Interference and damage to electrical equipment such as melting furnaces in pressure vessels

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