A welding method for an arc-shaped weldment with an L-shaped cross section

A welding method and technology of welded parts, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems of lack of solutions and inability to complete high-precision matching of arc structures at the same time, and achieve convenient flip welding, rigidity and Reliable strength and uniform pressure distribution
CN107052608BActive Publication Date: 2019-10-22SHANDONG NUCLEAR POWER EQUIP MFG
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG NUCLEAR POWER EQUIP MFG
Publication Date
2019-10-22

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Abstract

The invention provides a welding device and a method of arc welding parts with L-shaped sections, solves the problems of capability of only performing rigid welding fixation for more regular plates and incapability of synchronously finishing high-precision assembly of arc structures in the prior art, and achieves the effect of high welding precision. The welding device comprises a box body, and a rotating bracket at the lower part of the box body; the box body is welded with a long arc positioning surface with an L-shaped section; multiple arc pressing plates are arranged on one side of the long arc positioning surface; the arc welding parts are arranged between the long arc positioning surface and the multiple arc pressing plates; the segmented pressing of the arc welding parts is realized through a pressing mechanism welded on the box body; the box body and the rotating bracket are connected through a rotating shaft; and the box body can rotate around the rotating shaft by 360 degrees to realize multi-directional welding.
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Description

technical field

[0001] The invention relates to a welding device for a permanent cavity sealing ring of a pressurized water reactor nuclear power plant, in particular to a welding method for an arc-shaped welded part with an L-shaped cross section. Background technique

[0002] The permanent reactor cavity sealing ring is arranged between the sealing edge of the reactor pressure vessel and the backing plate of the fuel pool plate, and is a circular water sealing device. When the fuel pool is flooded, the permanent cavity seal prevents water from entering the reactor cavity.

[0003] The permanent reactor cavity sealing ring is designed as an L-shaped curved sealing section, which can absorb the radial and vertical expansion of the reactor pressure vessel during the heat increase of the power station. The permanent cavity sealing ring is assembled and welded by 6 sections of the same arc-shaped structure and connecting plate in the power station. The arc-shaped structure is ...

Claims

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