Liquid cooling supporting tool for plug-in type connecting pipe and reactor core measuring pipe anti-deformation method

Abstract

The invention relates to the technical field of tube plate welding, in particular to a liquid cooling supporting tool for a plug-in type connecting tube and an anti-deformation method of a reactor core measuring tube.The liquid cooling supporting tool for the plug-in type connecting tube comprises a connecting block, a supporting rod and at least two moving rods, the connecting block is provided with an embedding groove, the end of each moving rod is provided with an embedding block, and the supporting rod is arranged in the embedding groove. The embedded block is in sliding fit with the embedded groove, all the moving rods define a conical expansion hole, the supporting rod comprises a transition section, the transition section can move in the axial direction of the expansion hole to expand the expansion hole, the moving rods are attached to the inner wall of the connecting pipe, the rigidity of the connecting pipe is improved, heat exchange transmission heat dissipation is conducted in the axial direction of the connecting pipe through a tool, and the service life of the connecting pipe is prolonged. Welding seam temperature is rapidly reduced, and welding quality is ensured; by adopting the tool to assist the welding of the reactor core measuring tube, the rigidity of the reactor core measuring tube can be improved, the temperature reduction of a welding seam between the reactor core measuring tube and the end socket can be accelerated, the welding deformation caused by overlarge circumferential temperature difference can be avoided, and the welding quality can be ensured.

Description

technical field [0001] The invention relates to the technical field of tube-sheet welding, in particular to a liquid-cooled supporting tool for plug-in connection and a method for preventing deformation of a core measuring tube. Background technique [0002] The merged Hualong No. 1 nuclear power technology is the third-generation advanced pressurized water reactor nuclear power technology independently developed by my country with completely independent intellectual property rights. It is also the mainstream in China and the most internationally competitive advanced nuclear power technology. The technical specification requirements have greatly improved the technical quality level of key parts of the nuclear island. At the same time, with the increase in the size of parts and a series of structural improvements such as integrated design, it is more difficult to control quality stability. [0003] The reactor pressure vessel is the core equipment of the reactor, such as figu...

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Problems solved by technology

[0003] The reactor pressure vessel is the core equipment of the reactor, such as Figure 1 shows the schematic diagram of the upper head core measurement tube. The core measurement tube is made of nickel-based material with an outer diameter of 144mm and a wall thickness of 16mm. The core measurement The side of the tube extending into the upper head is set as an inclined groove, and the end surface of the core measuring tube on the side of the groove forms an angle of 45° with the inner surface of the upper head, and the length of the core measuring tube extending into the head is about 40 mm. The weld seam is asymmetrical with respect to the axis of the core measuring tube, and the size of the weld seam is too small to allow two welders to weld at the same time. The current welding method generally uses robots to perform one-sided climbing welding, and the left and right sides of the weld bead are alternately applied. However, during the welding process, due to the different heat of the welds on both sides, the core measuring tube is prone to large deformation due to heat, and due to the structural characteristics of the product, the shape of the core measuring tube cannot be processed after welding , resulting in low welding dimensional accuracy of the core measuring tube, unable to meet product design requirements

[0004]Therefore, there is an urgent need for a technical solution to solve the direct welding between the existing core measuring tube and the head, and the core measuring tube is easy to be heated to produce a large Deformation, technical problems that cannot meet product design requirements

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