Pre-pulling device for reactor core measuring instrument of nuclear power plant

The utility model aims to provide the pre-pulling device for the reactor core measuring instrument of the nuclear power plant, which is used for carrying out controllable pre-pulling operation on the reactor core measuring instrument needing to be replaced, so that the subsequent pulling operation is convenient, and the reactor core measuring instrument is prevented from being jammed and fractured. The technical purpose is achieved through the following technical scheme: the pre-pulling device for the reactor core measuring instrument of the nuclear power plant; the lifting device comprises a supporting and fixing frame, a clamping assembly used for clamping and pulling the reactor core measuring instrument, a rope assembly used for pulling the clamping assembly and a lifting assembly used for stretching the rope assembly to provide pulling force for the clamping assembly, and further comprises a guide assembly connected with the supporting and fixing frame and rotating in the horizontal direction. The rope a