Method for adjusting perpendicularity of sleeve of AP1000 refueling machine

Abstract

The invention discloses a method for adjusting the perpendicularity of a sleeve of an AP1000 refueling machine, which is characterized by comprising the following steps of: 1, adjusting the perpendicularity of an outer sleeve; 2, adjusting the levelness of an inner sleeve balance arm; 3, adjusting the concentricity of the inner sleeve and the outer sleeve; 4, adjusting the gap between the inner sleeve and the guide wheel and ensuring that the guide wheel assembly is on the same plumb line; and 5, carrying out acceptance check. By means of the method, the perpendicularity of the outer sleeve can be ensured, it is ensured that the guide wheel is installed on a plumb line, it is ensured that the gap between the guide wheel and the inner sleeve meets the drawing requirement, and the operation perpendicularity and friction force of the inner sleeve can also meet the requirements.

Description

technical field [0001] The invention relates to a method for adjusting the verticality of a sleeve of an AP1000 refueling machine, and belongs to the technical field of adjusting the verticality of the sleeve of an AP1000 refueling machine. Background technique [0002] The AP1000 core consists of 157 sets of fuel assemblies, and the theoretical minimum gap between adjacent fuel assemblies is only 1.02mm. This requires a very high running verticality when the inner sleeve of the refueling machine moves up and down with the fuel assembly carried, otherwise, when the refueling machine is reloading in the normal position, it is easy to cause a gap between the operated assembly and the adjacent assembly. Scratches, damages the middle grid of the module. [0003] In order to prevent fuel damage during the up and down movement of fuel, the AP1000 refueling machine is equipped with overload and underload protection. If the parameters such as the verticality of the outer sleeve, t...

AI Technical Summary

Problems solved by technology

If the parameters such as the verticality of the outer sleeve, the concentricity of the inner and outer sleeves, the levelness of the balance arm of the inner sleeve, and the gap between the guide wheel of the outer sleeve and the inner sleeve are not adjusted properly, sometimes it can meet the verticality requirements of the inner sleeve. , there will still be too much friction in the operation of the inner sleeve, which will affect the efficiency of loading and unloading and the life of the guide wheel

[0004] The existing technology is not accurate enough to adjust the verticality of the outer sleeve by using the distance between the non-machined surface of the outer wall of the outer wall and the plumb line, because there is a large manufacturing error on the non-machined surface

There are certain limitations in adjusting the concentricity of the inner and outer sleeves by adjusting the thickness of the rubber block gasket at the lower end of the main lifter, because the torsion on the horizontal section of the inner sleeve and the concentricity in the direction of the guide wheel cannot be adjusted by this method

The verticality of the inner sleeve is tracked by the laser emitting device installed at the lower end of the inner sleeve, and the gap between each layer of guide wheels and the inner sleeve is adjusted accordingly. There are problems such as complicated operation, large measurement interference deviation and too long time-consuming , the whole process does not consider the impact of the eccentric force on the top of the inner sleeve caused by the eccentric force generated by the coil spring of the gas source tube of the fuel gripper cylinder, the coil spring of the cable drum of the underwater camera, and the proximity switch of the gripper to the top of the inner sleeve. larger factor

This factor will cause the measured running verticality of the inner sleeve to be relatively large. In this case, adjusting the clearance of the guide wheel will cause the guide wheel assembly to not be on a vertical line, which may cause the problem of large running friction of the inner sleeve.

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