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Hole plugging welding gun for upper end plug of nuclear fuel rod

A technology for nuclear fuel rods and plugging holes, which is applied in the field of welding torches and can solve problems such as affecting welding containers, product quality, and continuous maintenance of equipment.

Pending Publication Date: 2020-06-26
CNNC JIANZHONG NUCLEAR FUEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is loose, it will affect the drop of vacuum and helium pressure in the welding container
Consequences: direct impact on product quality, continuous maintenance of equipment, final production

Method used

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  • Hole plugging welding gun for upper end plug of nuclear fuel rod

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Embodiment Construction

[0023] The present invention will be further described below by means of the accompanying drawings and specific embodiments.

[0024] The insulating bakelite cover 8 is a cylindrical structure, and its inside is tightly installed with a tungsten pole positioning seat 13 by screwing, and the left end of the tungsten pole positioning seat 13 (such as figure 1 Shown) stretches out insulating Bakelite cover 8, and is processed with screw thread on the part outer wall that stretches out. The right end of the tungsten pole positioning seat 13 is located inside the insulating bakelite sleeve 8, and a section of the right end of the tungsten pole positioning seat 13 is processed with a boss structure, and the boss is in sealing contact with the insulating bakelite sleeve 8.

[0025] The inside of the tungsten pole positioning seat 13 is threadedly installed with the tungsten pole 7 , and the left end of the tungsten pole 7 is installed with the adjusting screw 1 , and the right end pr...

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Abstract

The invention belongs to a nuclear fuel manufacturing technology, and particularly relates to a hole plugging welding gun for an upper end plug of a nuclear fuel rod. The welding gun comprises an insulating bakelite sleeve, a tungsten electrode positioning seat coaxially arranged in the insulating bakelite sleeve, and a tungsten electrode rod coaxially arranged in the tungsten electrode positioning seat, wherein an adjusting screw rod is arranged at the end part of the tungsten electrode rod; a compression screw, a flange cover and a gun body positioning block are coaxially arranged outside the insulating bakelite sleeve; the gun body positioning block is connected with the insulating bakelite sleeve in a sealed mode; the gun body positioning block is located in the flange cover; the compression screw outside the insulating bakelite sleeve penetrates through the bottom of the flange cover; and the end of the compression screw makes contact with the bottom of the gun body positioning block. The welding gun can be freely adjusted up and down and left and right, so that a fuel rod end plug hole can be quickly centered, the tungsten electrode can be randomly replaced and adjusted, andthe helium pressure and the vacuum degree in a welding container cannot be influenced during production.

Description

technical field [0001] The invention belongs to nuclear fuel manufacturing technology, in particular to a welding torch. Background technique [0002] In PWR fuel assemblies, fuel rods are the core components of the entire fuel assembly. The hole plugging welding station is a key process in the welding and manufacturing of the entire fuel rod, and has important practical significance for the manufacturing accuracy of the entire fuel assembly. [0003] In order to solve the problem of plugging the hole welding torch at the upper end of the fuel rod of the pressurized water reactor fuel assembly. The structure of the gun body currently used is as follows: sintered ceramics rotates an electrode rod, and the sintered ceramics and the electrode rod each have one to two sealing rubber rings. Fix the sintered ceramic on the welding chamber, and then screw the electrode rod into the inner hole of the ceramic. [0004] Since the inner hole and outer circle of the sintered ceramic ...

Claims

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Application Information

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IPC IPC(8): G21C21/02
CPCG21C21/02Y02E30/30
Inventor 钟毅尤勇易小波骆宾齐雨辰
Owner CNNC JIANZHONG NUCLEAR FUEL
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