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Welding part inspection device and welding part inspection method of boiler water wall

A technology for inspection devices and water-cooled walls, which can be used in measuring devices, testing of fluid tightness, testing of machine/structural components, etc., and can solve problems such as cumbersome inspection, low detection accuracy, and time-consuming

Active Publication Date: 2016-08-24
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are flammable substances in the chemical liquid used for PT inspection, and there is a problem that care is required during the handling of the chemical liquid and the inspection is cumbersome.
In addition, in the PT inspection, there are problems that the inspection process takes time due to the large number of steps, and the detection accuracy of the through-through defect is not high.

Method used

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  • Welding part inspection device and welding part inspection method of boiler water wall
  • Welding part inspection device and welding part inspection method of boiler water wall
  • Welding part inspection device and welding part inspection method of boiler water wall

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach 〕

[0042] figure 2 It is a perspective view schematically showing the vacuum box 100 of the welded portion inspection apparatus according to the first embodiment together with a part of the bottom water cooling wall 2 . The bottom water cooling wall 2 is composed of a plurality of water cooling tubes 10 arranged in parallel with a predetermined interval, and fins 12 arranged so as to close the gaps between the water cooling tubes 10 . The fins 12 are welded to the water-cooled tubes 10 along the longitudinal direction of the water-cooled tubes 10 , and close the gaps between the water-cooled tubes 10 across the longitudinal direction. Therefore, the bottom water cooling wall 2 has irregularities corresponding to the curvature of the outer peripheral surface of the water cooling tube 10 .

[0043] In more detail, as image 3 As shown, each water-cooling tube 10 is constituted by a plurality of straight tubes 10 a connected in series via the welded portion 14 . The fins 12 are ...

no. 2 approach 〕

[0078] Hereinafter, the welding part inspection apparatus of the boiler water wall of 2nd Embodiment is demonstrated. It should be noted that, among the structures of the second embodiment, the parts similar to or the same as those of the first embodiment are given the same names or reference numerals, and the descriptions thereof are simplified or omitted.

[0079] The welding portion inspection apparatus of the second embodiment is used to inspect the arcuately curved portion of the water cooling tube 10 , for example, to inspect the corner portion formed by the front water cooling wall 4 and the bottom water cooling wall 2 . For this reason, the welding portion inspection apparatus of the second embodiment is different from the welded portion inspection apparatus of the first embodiment only in that it is used instead of the vacuum box 100 . Figure 7 The vacuum box 200 of the schematic structure is shown in FIG.

[0080] like Figure 7 As shown, the water-cooled tube 10 ...

no. 3 approach 〕

[0090] Hereinafter, the welding part inspection apparatus of the boiler water wall of 3rd Embodiment is demonstrated. It should be noted that, in the configuration of the third embodiment, the parts similar to or the same as the configurations of the first embodiment and the second embodiment are denoted by the same names or reference numerals to simplify or omit the description.

[0091] like Figure 9 As shown, the inspection apparatus for the welded portion of the boiler water wall of the third embodiment is used when inspecting the corners of the water wall 1 arranged so as to intersect the water cooling tubes 10 . Such inspection objects are, for example, the angle formed by the bottom water wall 2 of the boiler water wall 1 and the side water wall 5 , the water cooling tubes (parallel water cooling tubes) 10 and fins 12 of the side water wall 5 and the bottom water wall 2 . Between the water-cooled tubes (cross water-cooled tubes) 10 are blocked by fins 302 welded to th...

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PUM

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Abstract

The object of the present invention is to provide a welded portion inspection device and welded portion inspection method of boiler water-cooled walls, which can easily and reliably detect the water-cooled tubes and fins in the boiler water-cooled wall, and the mutual gap between fins in a short time. For defects penetrated by welded parts, the vacuum box (100) of the welded part inspection device for boiler water-cooled walls has: two side walls, which are respectively arranged along the parallel water-cooled pipes; at least one end wall (114), which is It is arranged in such a way as to cross the longitudinal direction of the parallel water-cooled pipes (10); the side edge sealing member is used to seal between the edge of the side wall and the parallel water-cooled pipes (10); the end edge sealing member (130) is It is used for sealing between the edge (138) of the end wall (114) and the parallel water cooling tubes (10) and fins (12). The edge (130) of the end wall (114) has a linear edge (140) along the fin (12) and an arc-shaped edge (142) along the parallel water-cooled tube (10), and the edge is sealed The member (130) has a linear seal portion (146) attached to the linear edge portion (140) and an arc-shaped seal portion (148) attached to the arc-shaped edge portion (142).

Description

technical field [0001] The invention relates to a welding part inspection device and a welding part inspection method of a boiler water wall. Background technique [0002] In JIS Z2329 2002, the vacuum method of the foaming leakage test method is specified. According to this vacuum method, the vacuum box is brought into airtight contact with the test surface, the inside of the vacuum box is depressurized, and the leakage of gas in the test surface and the presence or absence of foaming of the foaming liquid applied to the test surface are confirmed. Location. [0003] In Patent Document 1, a leakage inspection device of a tube sheet of a condenser capable of inspecting a leakage of a cooling pipe of a condenser based on the vacuum method is described. The two contact boxes of the leakage inspection device are in contact with the flat tube sheets, and the leakage of the cooling pipes extending between the tube sheets is inspected. [0004] On the other hand, as a leak insp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/04
CPCG01M3/142G01M3/145
Inventor 三井康正浦山久雄
Owner MITSUBISHI HEAVY IND LTD