Method for making and installing embedded parts of shaft wellhead of high temperature gas-cooled reactor

Abstract

The invention belongs to the technical field of building of nuclear power plants. To solve the problems that in the process of manufacturing and mounting an embedded part of a wellhead of a high-temperature gas-cooled reactor vertical well, the embedded part deforms easily, machining precision is affected easily, and the job time of technicians is long, the auxiliary device for manufacturing and mounting the embedded part of the wellhead of the high-temperature gas-cooled reactor vertical well is provided. The auxiliary device comprises an external tool and at least three internal tools. Each internal tool comprises a center pipe. Multiple supporting columns are radially distributed on the outer wall of each center pipe. The ends, far away from the corresponding center pipe, of the supporting columns are provided with jackscrews. The jackscrews are connected with supporting plates. The supporting plates are each of an arc-shaped structure the same as the structure of a cylinder body of the embedded part. The external tool comprises a body. The body is of a cylindrical structure and is provided with multiple adjusting bolts. The ends, located on the inner side of the body, of the adjusting bolts are provided with spacers. By the adoption of the auxiliary device, assembly welding of cylinder bodies of embedded parts can be completed quickly, it is guaranteed that machining precision meets the requirement, and deformation in the mounting process is prevented.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant construction, and in particular relates to a method for manufacturing and installing a high-temperature gas-cooled reactor shaft wellhead embedded part. Background technique [0002] The high-temperature gas-cooled reactor is an advanced nuclear energy technology with the characteristics of the fourth generation technology. The embedded parts of the shaft wellhead of the spent fuel storage system of the high-temperature gas-cooled reactor are located at the shaft wellhead of the spent fuel building, such as figure 1 As shown, the high-temperature gas-cooled reactor shaft wellhead embedded part 15 includes the top ring plate assembly 10, the upper section of the barrel section 11, the middle section of the barrel section 12, the lower section of the barrel section 13 and the bell mouth 14. During the production of the embedded part 15, it is necessary The upper section 11, the middle se...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems of easy deformation of embedded parts, affected machining accuracy and long working time of technicians during the production and installation of high-temperature gas-cooled reactor vertical shaft wellhead, the present invention proposes a high-temperature gas-cooled reactor shaft wellhead pre-embedded Auxiliary device for making and installing parts, including external tooling and at least three internal tooling; the internal tooling includes a central tube, and several supporting columns are radially distributed on the outer wall of the central tube, and the supporting columns are far away from the central tube One end of one end is provided with a top wire, and the top wire is connected with a support plate, and the support plate is the same arc-shaped structure as the embedded part cylinder structure; the external tooling includes a body, which is a cylindrical structure, and the body The wall thickness is greater than the wall thickness of the embedded part cylinder, the inner diameter of the body is larger than the outer diameter of the embedded part cylinder, and several adjusting bolts are provided on the body, and the adjusting bolts pass through the outer wall and the inner wall of the body , and the end of the adjustment bolt located inside the body is provided with a gasket; when in use, the internal tooling is located inside the embedded part cylinder, and the external tooling is located outside the embedded part cylinder

Images