Pressure-maintaining maintenance seal experiment table

Abstract

The invention discloses a pressure-maintaining maintenance seal experiment table which is a uniform performance test experiment table developed for checking pressure-maintaining maintenance seal. The pressure-maintaining maintenance seal experiment table comprises an experiment table body, a cooling water system, a high-pressure air source system, a heating system, a temperature measuring system and a bolt pull force measuring system. Under the condition of simulating an actual working condition, the pressure-maintaining maintenance seal experiment table is used for checking the pressure-maintaining maintenance seal function and the feasibility and the reliability of key parts, and realizes a seal performance test under the working state of a primary maintenance seal, a seal performance test after a secondary maintenance seal is jointed for multiple times, cooling capacity analysis of a cooing sleeve, research of a treatment method for residual water in a maintenance seal structure after a cover plate and a cooling sleeve are dismantled, research of a dismantling process and method of a gland bolt of the primary maintenance seal when a bottom chamber is in a high-pressure state, influence research of temperature (mainly measurement of a main shaft temperature, a temperature in a high-pressure cavity, a temperature of a low-pressure cavity and a temperature change along the axial direction) on each seal, and influence of main shaft deflection on the performance of the secondary maintenance seal.

Description

technical field [0001] The invention belongs to the field of pressure maintaining systems, and in particular relates to a pressure maintaining maintenance sealing test bench. Background technique [0002] The high-temperature gas-cooled reactor is a kind of fourth-generation nuclear reactor, which uses helium as the coolant, and the core outlet temperature is as high as 850-1000 degrees Celsius. It has the advantages of high thermal efficiency, high fuel consumption conversion ratio, and intrinsic safety. It is one of the fourth-generation advanced nuclear energy system technologies that my country focuses on. In the primary loop system of a high-temperature gas-cooled reactor, the fan used to drive the coolant to circulate in the system is called the main fan. The main fan is the "heart" part of the gas-cooled reactor, and it is a key component to ensure the safety of nuclear power operation and control the circulation of cooling medium. [0003] The main fan of the high ...

AI Technical Summary

Problems solved by technology

The working pressure of the gas-cooled reactor is about 60-70 times the normal pressure. Once the pressure is released, the gas volume will expand to 60-70 times the working volume. It is difficult to store such a large amount of radioactive gas.

If the pressure is released to the atmosphere, on the one hand, it will cause a large amount of expensive working gas (helium) to be lost and wasted; on the other hand, strict purification must be carried out before discharge, resulting in a significant increase in operating costs

If the pressure is released by means of pressurized storage, it will take a long time. At the same time, it is also necessary to build a gas storage device with a volume similar to that of a nuclear reactor. When restarting the gas-cooled reactor, the pressure must be gradually increased. The whole process takes a long time. Difficulty, serious economic losses caused by pressure relief maintenance

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