Hoisting clamp specially used for reactor coolant pump main flange bolt

Abstract

The invention relates to a hoisting clamp specially used for a reactor coolant pump main flange bolt, which comprises a hoisting ring, clamping jaw assemblies, a hoisting rod, an intermediate rod located below the hoisting rod parallelly to the hoisting rod, two sets of clamping jaw assemblies which are respectively arranged at two ends of the hoisting rod and the intermediate rod symmetrically; the hoisting ring is fixed at the center of the hoisting rod; each set of clamping jaw assemblies comprises two hook-shaped bodies and two connecting rods; the hook-shaped body has a one-piece structure comprising a hook body and a hook handle; the two hook bodies are arranged symmetrically and intersect with each other, and round holes are disposed at the intersecting parts; the hook handle end of each of the two hook-shaped body is respectively and movably connected with one end of each of the two connecting rods, and the other end of each of the two connecting rods is movably connected with one end of the hoisting rod; two ends of the intermediate rod pass through the round holes of the two sets of clamping jaw assemblies respectively, and are movably connected with the two sets of clamping jaw assemblies. The invention realizes rapid, convenient, and safe hoisting of a reactor coolant pump main flange bolt, and improves the cleaning efficiency and the automation level of hoisting equipment.

Description

technical field [0001] The invention relates to a lifting fixture, in particular to a lifting fixture used for the main flange bolts of a nuclear reactor coolant pump. Background technique [0002] The bolts of the main flange of the reactor coolant pump of the pressurized water reactor nuclear power plant are generally relatively long and relatively heavy. For example, the two ends of the main flange bolt of the 100D reactor coolant pump are threaded sections, and the middle section is a non-threaded optical axis. The total length of the bolts is 980mm. , the weight of a single bolt is about 75Kg, and there are 24 bolts in total. The threaded sections at both ends of the main flange bolts of the reactor coolant pump need to be cleaned, descaled and oiled regularly. [0003] At present, the cleaning and oiling of the bolt threads of the main flange of the reactor coolant pump mainly adopts a horizontal method (that is, the bolts are cleaned and oiled in a horizontal state). ...

AI Technical Summary

Problems solved by technology

[0004] In the process of hoisting in and out of the main flange bolts of the reactor coolant pump, slings are mainly used for lifting at present. When lifting each time, the slings need to be fastened, and at the same time, the center of gravity lifting point of the main flange bolts of the reactor coolant pump is found Due to the large number of bolts, the method of using slings requires manual installation of the slings, which is time-consuming and inefficient, and when the slings are lifted, the bolts of the main flange of the reactor coolant pump are likely to slip from the slings, causing injuries to personnel and equipment

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