A probe-type high-response liquid metal leak detection device

Abstract

The invention provides a probe-type high-frequency-response liquid metal leakage detector. The probe-type high-frequency-response liquid metal leakage detector comprises an output probe, an input probe, an output probe fixing clamp, an input probe fixing clamp, a 24V direct-current power supply, a main control circuit board and a connecting terminal, wherein the connecting terminal led out by the main control circuit board is connected with the output probe and the input probe, and the output probe and the input probe are fixed at liquid metal leakage positions by the fixing clamps. When liquid metal leaks, the output probe and the input probe can be conducted, the main control circuit board can be triggered during conduction, and the main control circuit board outputs conduction signals for use of other detection equipment. Besides, the main control circuit board can cut off output signals of the output probe within 10 microseconds, so that the problem that operation of other sensors contacting with the liquid metal or a pipeline is affected due to electrification of the whole liquid metal and a pipeline thereof caused by the signals of the output probe is prevented. The probe-type high-frequency-response liquid metal leakage detector is capable of rapidly detecting leakage, outputting leakage signals and timely cutting off output of the probe signals generated due to liquid metal conduction.

Description

technical field [0001] The invention belongs to the technical field of liquid metal leakage measurement, and in particular relates to a probe-type, high-response liquid metal leakage measurement device. Background technique [0002] Liquid metal is a metal with high conductivity. At present, there are mainly two methods for its leakage measurement: gravity tray and probe. [0003] The principle of the gravity tray to detect liquid metal leakage is: when the liquid metal leaks, it will fall to the gravity tray under the action of gravity. At this time, the mass of the tray will increase, so that the corresponding signal is output to the detection equipment, and the liquid metal can be obtained. leaked signal. The utility model has the advantages of being able to adapt to the use requirements of harsh environments, and can detect whether there is liquid metal leakage in a wide range. But it has the following disadvantages: [0004] (1) The online dynamic response speed is s...

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Problems solved by technology

[0004] (1) The online dynamic response speed is slow, because this detection method can only detect the leakage signal when the liquid metal falls on the gravity tray, and it takes a certain time from the liquid metal leakage to the fall on the tray, so it cannot be detected immediately to liquid metal leakage;

[0005] (2) The location of the leak point cannot be accurately obtained. Since this detection method usually detects whether there is liquid metal leakage in a certain range and area, it cannot accurately detect liquid metal leakage at a certain position

[0007] (1) After the probe is turned on, the liquid metal or the pipeline will be charged, which will affect the work of other sensors arranged on it

This is because, when the liquid metal leaks and conducts the two electrodes of the probe, at this time, the entire pipeline is also charged. Although the potential can be clamped to zero by grounding, due to the distributed capacitance of the pipeline or the metal itself The existence of internal resistance and internal resistance will make it still have a certain voltage, and the voltage signal will affect the work of other sensors directly arranged above the pipeline;

[0008] (2) The fixing of the probe is more troublesome. On the one hand, the probe must be able to detect liquid metal leakage in time, which requires that the probe should not be too far away from the leak point or the pipeline. On the other hand, it must be ensured that the probe is vibrated or In the case of fluctuations, it will not deviate from the original fixed point to prevent contact with the pipeline or the contact between the two electrodes of the probe, resulting in false triggering

[0009] In summary, the disadvantages of the above measurement methods limit their scope of use

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