Guide tube and upper tube seat quick releasable connection structure and method

Abstract

The invention discloses a guide tube and upper tube seat quick releasable connection structure and method; the structure comprises a socket joint component mounted on a guide tube and matched with a mounting hole of an upper tube seat; the socket joint component includes a socket tube sleeving the guide tube, a connection tube inserted onto one end of the socket tube far away from the guide tube,a bearing ring rotationally sleeving the connection tube, and a limiting ring axially sleeving the connection tube in traversing manner and capable of rotating with the bearing ring; the inner side ofthe mounting hole is provided with a step abutted to the bearing ring, and the connection tube is provided with a plurality of clamp grooves allowing reliable clamping of the limiting ring; after thebearing ring is passed into the mounting hole, the bearing ring is rotated to abut to the step, and the limiting ring moves axially along the connection tube and may rotate with the bearing ring after leaving the clamp grooves; after the bearing ring is abutted to the step, the limiting ring axially moves and returns and is clamped to another clamp groove. The guide tube and upper tube seat quickreleasable connection structure is simple in structure and good in connection reliability; the problem that the connected upper guide eat and the guide tube cannot be detached repeatedly is solved, and repeated detaching and safe self-locking can be performed.

Description

technical field [0001] The invention relates to the technical field of nuclear fuel assemblies, in particular to a quick and detachable connection structure and method for a guide pipe and an upper pipe seat. Background technique [0002] Nuclear fuel assemblies are generally composed of upper nozzles, lower nozzles, guide tubes, instrumentation tubes, grids and fuel rods, among which the lower nozzles, guide tubes, instrumentation tubes and grids form the skeleton of the fuel assembly. The guide tube connection serves to protect the fuel rods. [0003] At present, the connection method between the upper tube seat and the guide tube in the fuel assembly is mainly the threaded connection between the sleeve screw and the sleeve tube, and the skirt of the sleeve screw expands into the groove of the guide tube hole of the upper tube base, and then the upper tube base and the guide tube Connect to become one. When the fuel rod is damaged, the upper pipe seat needs to be removed...

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