Device for thermal treatment after welding of partition board of steam turbine
A post-weld heat treatment and steam turbine technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve problems such as deformation, and achieve the effect of reducing production costs, simple operation, and avoiding repairs.
Active Publication Date: 2011-06-08
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Problems solved by technology
[0003] In order to overcome the deficiencies in the prior art above, the present invention aims to provide a post-weld heat treatment device for the diaphragm of a steam turbine, which not only ensures uniform stress release but also has the function of correcting the size of the diaphragm during the post-weld heat treatment process of the diaphragm , to solve the deformation problem of the ultra-supercritical large steam turbine low-pressure diaphragm after welding, and to ensure the quality of the welded diaphragm
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Embodiment Construction
[0014] like figure 1 As shown, the present invention is a post-weld heat treatment device for a steam turbine diaphragm, which includes a backing plate 1, a filler block, a pressure plate and a pressure plate screw 6, and the diaphragm 10 includes an inner ring 101, a vane 102 and an outer Ring 103, where:
[0015] The backing plate 1 is placed under the partition plate 10, and the backing plate 1 is respectively provided with n screw holes 11 along the circumferential direction at the inner side of the inner ring 101 of the partition plate 10 and the outer side of the outer ring 103 of the partition plate 10, wherein n is Natural number;
[0016] The filler block is placed on the backing plate 1, which includes the outer ring filler block 2 and the inner ring filler block 3, and the outer ring filler block 2 and the inner ring filler block 3 are respectively located under the outer ring 103 and the inner ring 101 of the separator 10 ;
[0017] The pressure plate includes a...
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The invention relates to a device for thermal treatment after welding of a partition board of a steam turbine, the partition board comprises an inner ring, a static blade and an outer ring, special devices comprise a bolster, filler blocks, a pressure plate and screws of the pressure plate, wherein the bolster is arranged below the partition board, n screw holes are formed in the positions of theinner side of the inner ring of the partition board and the outer side of the outer ring along the circumferential direction, wherein n is a natural number; the filler blocks are arranged on the bolster and comprise the outer ring filler block and the inner ring filler block, and the outer ring filler block and the inner ring filler block are respectively positioned below the outer ring and belowthe inner ring of the partition board. The device can achieve the purposes of eliminating the welding stress of the partition board while fully ensuring the size of the partition board, avoid ultra-poor products, lead the primary qualified rate to be 100% and bring great economic benefits for enterprises.
Description
technical field [0001] The invention relates to a metal material heat treatment process, in particular to a post-weld heat treatment device for a steam turbine clapboard. Background technique [0002] The low-pressure diaphragm of ultra-supercritical large-scale steam turbine is different in structure from the diaphragm type of the previous subcritical steam turbine. This type of diaphragm is mainly composed of inner ring, stationary vane, outer ring, etc., with large size and the largest outer diameter Up to φ4684mm, the appearance is thin after welding, the partition plate is naturally placed in an inverted basin shape, and the inner ring and stationary leaves are cantilevered. Due to the inevitable existence of welding stress and deformation of the separator, if the existing process method is used, the welded separator is placed on the iron plate and put into the furnace together for post-weld heat treatment, and the result is that the separator will appear in production....
Claims
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IPC IPC(8): C21D9/00C22F1/00
Inventor 宋帆方顺发丁丽锋袁达
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD