Load protection method and system for nuclear fuel tilting machine

Abstract

The invention relates to a load protection method and a load protection system for a nuclear fuel tilting machine. The method comprises the following steps of: 1, setting a reasonable load range corresponding to each position of the tilting machine; 2, monitoring an actual position of the tilting machine, and monitoring an actual load numerical value of the actual position; and 3, comparing the actual load numerical value of the actual position in the step 2 with the reasonable load range corresponding to the actual position, and judging whether the tilting machine is overloaded or not. The actual position and the actual load numerical value thereof of the tilting machine are monitored in real time, the actual load numerical value of the actual position is compared with the reasonable load range of the actual position, and whether the actual position is overloaded or not is judged, so that whether a real-time position of the tilting machine exceeds the reasonable load range or not can be monitored in real time, and load protection is performed more accurately; in addition, a controller can process monitoring signals of a weighing sensor and a coder to obtain the actual position and the actual load numerical value, so that the load protection is monitored more visually and accurately.

Description

technical field [0001] The invention relates to a nuclear fuel shipping device of a nuclear power plant, and more specifically relates to a method and system for protecting the load of a nuclear fuel tilting machine used in a tens of millions of nuclear power plants. Background technique [0002] In current pressurized water reactor nuclear power plants, it is necessary to use a fuel transfer device to transfer fuel assemblies. The current fuel transfer device usually includes a tipping frame 1, a fuel basket installed on the tipping frame 1, a reel driving mechanism 2, etc., such as figure 1 shown. The reel driving mechanism 2 pulls the tipping frame 1 through the wire rope 3, the guide pulley, etc., to realize operations such as tipping and transfer of the fuel basket. [0003] In order to protect the safety of the nuclear fuel assembly during the overturning process, prevent the tipping frame 1 from being disturbed by external obstacles such as scraping, grinding, hooki...

AI Technical Summary

Problems solved by technology

[0005] 1. The torque measurement switch 4 is mechanical, and the zero point drifts after a period of use, which needs to be calibrated

[0006] 2. Only contact signals can be output, and the specific load value cannot be known

[0007] 3. Limited by the measurement components and protection methods, only two fixed values ​​can be set, which cannot ensure that the force on the fuel assembly itself meets the limit value requirements when overload or underload occurs;

[0008] 4. The alarm signal can only be output when the value exceeds a fixed value, and the purpose of real-time protection cannot be achieved

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