Driving mechanism for neutron producer detection

Abstract

The invention discloses a drive mechanism for inspecting neutron producer, which comprises a power transmission mechanism and an inspection neutron producer. The power transmission mechanism comprises parts such as a motor, a large pulley, a limit switch and a baffle plate, wherein, the control of the motor is realized by changing the power supply polarity of the motor, namely, changing the running direction of the motor and cooperating with a diode and the limit switch; the limit switch consists of a positive electrode, a negative electrode and an insulating strip; the positive electrode andthe negative electrode are fixed on the insulating strip and elastically contacted; a lifting rope with the lower part fixing on the baffle block runs through the positive electrode and the negative electrode. The up-and-down movement of the lifting rope drives the baffle block and leads the elastic contact point of the negative electrode to lose contact with the positive electrode, the motor stop running and the neutron producer is in place. In the technical proposal provided by the invention, raising and lowering of the neutron producer rely on changing the power supply polarity of the motor and cooperating with the diode and the limit switch, overall control can be realized by using only one single core cable, thus ensuring very simple circuit and accurate position for placing the neutron producer simultaneously.

Description

technical field [0001] The invention belongs to the technical field of nuclear detection, and in particular relates to a driving mechanism for testing a neutron source. Background technique [0002] Due to the high dose, it is impossible to take out the nuclear detection system placed in the reactor at will for inspection. Therefore, it is a simple matter to hoist the inspection neutron source into the detection system in the reactor, and to conduct online inspection of the detector and its instrument working status. practical way. For example, in the detection device for fuel element damage detection used in sodium-cooled fast reactors, an inspection neutron source guide is installed, and the inspection neutron source is hoisted in from the neutron source guide if necessary to check whether the detection device is working normally. Usually, the driving mechanism of the neutron source for inspection is relatively simple, for example, a motor is used to drive the sling with ...

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly aims at the problem of inaccurate positioning of the neutron source drive device in the prior art, and provides a test neutron source drive device with accurate positioning and simple control circuit

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