Control rod assembly outer sleeve refuelling tool

The invention discloses a control rod assembly outer sleeve refuelling tool which comprises an operation head; a sleeve assembly which is fixedly connected with the operation head; and a locking structure, wherein is used for locking or unlocking with an outer sleeve when the sleeve assembly of the refueling tool is located in a control rod assembly outer sleeve, the sleeve assembly comprises an upper sleeve and a lower sleeve which is movably connected with the upper sleeve, and the lower sleeve is arranged to be capable of deviating from the axial direction to swing relative to the upper sleeve. The refueling tool provided by the embodiment of the invention can be locked with the spent outer sleeve which is bent and deformed in the reactor, so that the spent outer sleeve can be replaced. 一种控制棒组件外套筒的换料工具，包括：操作头；与所述操作头固定连接的套管组件；以及锁定结构；用于当所述换料工具的套管组件位于控制棒组件外套筒内时，与所述外套筒锁定或解锁；其中所述套管组件包括上部套管和与所述上部套管活动连接的下部套管，所述下部套管被设置成能够相对于所述上部套管偏离轴向摆动。本发明实施例的换料工具能够与反应堆内出现弯曲变形的乏外套筒进行锁定，从而对其进行更换。