CN104749183A - Video inspection tool for secondary side tube plate of steam generator - Google Patents
Video inspection tool for secondary side tube plate of steam generator Download PDFInfo
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- CN104749183A CN104749183A CN201310751063.6A CN201310751063A CN104749183A CN 104749183 A CN104749183 A CN 104749183A CN 201310751063 A CN201310751063 A CN 201310751063A CN 104749183 A CN104749183 A CN 104749183A
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- guide pipe
- rear end
- steam generator
- secondary side
- hole
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Abstract
The invention belongs to the technical field of special tools for video inspection for nuclear power equipment, and particularly relates to a video inspection tool for a secondary side tube plate of a steam generator. The video inspection tool comprises a support (1), a rotary sleeve (3) and a guide tube (5), wherein the support (1) comprises a support plate (1-1) and a barrel body (1-2); the rotary sleeve (3) comprises a front end cover (3-1), an inner barrel (3-2), a rear end cover (3-3), a rolling shaft (3-5) and a rolling barrel (3-6); the main body of the guide tube (5) is a section of a rectangular tube body and penetrates through the through holes of the front end surface (3-1) and the rear end surface (3-3) of the rotary sleeve (3), two ends are exposed out of the front end surface (3-1) and the rear end surface (3-3) of the rotary sleeve (3) respectively; a part of the tube body exposing out of the rear end surface (3-3), of the guide tube (5) is an elbow, and the bending angle and the bending direction of the elbow are determined according to actual needs. The video inspection tool has the following beneficial effect: a guide channel of the video inspection tool disclosed by the invention adopts a structure with an upper layer and a lower layer, and the co-operation of a video probe and a foreign matter grabbing tool in the same hand hole can be realized, so that the working efficiency can be improved.
Description
Technical field
The invention belongs to nuclear power generating equipment video check specific purpose tool technical field, be specifically related to a kind of steam generator secondary side tube sheet video check instrument.
Background technology
Steam generator, due to its structure, becomes " gatherer " of secondary circuit foreign matter and body refuse.To the operation phase from the Installation and Debugging stage, some metals residual in pipeline and non-metal foreign body are washed in steam generator secondary side.In steam generator secondary side operational process, the foreign matter entering secondary side will clash into heat-transfer pipe under the drive of high-velocity flow, heat-transfer pipe can be caused damaged, cause the leakage of primary side fluid time serious.Therefore, both at home and abroad steam generator secondary side tube sheet video check is paid much attention to.Meanwhile, the deposition conditions of steam generator secondary side body refuse and corrosion can be understood by the work of tube sheet video check, situation be controlled to the effect of steam generator hydrodynamic cleaning and nuclear power station secondary side water chemistry all there is certain reference significance.Domestic existing tube sheet video check instrument uses nylon lath and plastic tube realization to the support of video probe and guiding, because steam generator tubesheet dimension is comparatively large, needs taken out completely by probe and change checking tool in tube sheet video check process.The tool operation of domestic existing tube sheet video check, use difficulty comparatively greatly, require higher to operator.Simultaneously, when carrying out the work of tube sheet video check, operator need stand near steam generator secondary side hand hole for a long time, and this regional environment dose rate is higher, therefore design and develop a set of more effective, operate easy steam generator secondary side tube sheet video check instrument and seem very necessary.
Summary of the invention
The object of the invention is, for technical matterss such as existing checking tool operation easier are large, to provide a kind of steam generator secondary side tube sheet video check instrument.
The technical scheme realizing the object of the invention is:
A kind of steam generator secondary side tube sheet video check instrument, comprises support, turnbarrel and guide pipe;
Support comprises back up pad and cylindrical shell; Back up pad is rectangle aluminium sheet, and centre has manhole; Pilot hole is had, for being connected the secondary side hand hole flange of steam generator by hex bolts in rectangle corner; Cylindrical shell is the cylinder of hollow, and cylindrical shell is vertically welded in the through hole in the middle of back up pad;
Turnbarrel comprises front end end cover, inner core, rear end cap, roller bearing and cylinder; Inner core is cylindric, and the diameter compatible of external diameter and cylindrical shell closes; One end of inner core is welded with front end end cover, and the other end is welded with rear end cap; Front end end cover is the right cylinder being provided with cylindrical boss, and the external diameter of cylindrical boss and the diameter compatible of inner core close, and the external diameter of front end end cover is greater than the external diameter of inner core, has through hole in the middle of front end end cover, and shape of through holes adapts with the guide pipe profile stretching into inner core; The cylindrical boss of front end end cover is fixedly mounted in inner core one end;
Rear end cap has a round pie inner cap and an annular end cap, and the external diameter of circular inner cap and the diameter compatible of inner core close, and be arranged on inner core one end inner, annular end cap is fixedly mounted on inner tank theca; Have a through hole in the middle of the round pie inner cap of rear end cap, shape of through holes adapts with the guide pipe profile stretching into inner core.
Guide pipe main body is the square body of a segment length, and through the through hole of turnbarrel front end face and rear end face, two ends expose turnbarrel front end face and rear end face respectively; Guide pipe inside is provided with one piece of dividing plate, the interior bone of guide pipe is divided into two parts, and top is video probe passage, and bottom is foreign body grabbing passage; The part body that guide pipe exposes rear end face is elbow, and its angle of bend and direction are determined according to actual needs.
Described pilot hole is strip, can adapt to the hand hole flange of different size.
The rectangle both sides of the edge thickness of described back up pad is greater than center section and forms strip projected parts, and fit with the secondary side hand hole flange bottom of steam generator, center section forms recess.
Described cylindrical shell and back up pad junction are provided with reinforcement structure, strengthen structure and are preferably the annulus that cross section is equilateral triangle.
The through hole bottom of described front end end cover is provided with rolling structure, and sliding friction is converted to rolling friction, reduces friction force when guide pipe moves; Be provided with rolling structure equally in the through hole bottom of rear end cap, sliding friction is converted to rolling friction, reduce friction force when guide pipe moves;
Described rolling structure comprises roller bearing and is arranged on cylinder outside roller bearing, roller bearing front end end cover and rear end cap inner, perpendicular to guide pipe moving direction.
Described front end end cover through hole edge is provided with gripping mechanism, for the position of fixed guide pipe, avoids mobile.Described gripping mechanism is the two or four ear block being symmetricly set on through hole edge, has through hole in the middle of ear block, and guide pipe is fixed through through hole by annular knurl microcephaly screw.
The increase of described guide pipe front end arranges one or more snippets extension rod, and the structure of extension rod is identical with guide pipe, and the inside and outside wall size of extension rod is identical with guide pipe, and partition position is identical.
Described extension rod is the square body of rod of a segment length, and through the through hole of turnbarrel front end face and rear end face, the outside of turnbarrel front end face and rear end face is exposed at two ends respectively, can be axially movable along turnbarrel.
Described body of rod top is provided with one piece of dividing plate, body of rod interior bone is divided into two parts, and top is video probe passage, and bottom is foreign body grabbing passage; Lever front end part internal diameter increases, and rear end part external diameter and front section diameter compatible close, and making between multistage extension rod can grafting; Body of rod top is the cover plate that can overturn, and along the upset of body of rod circumference, when being convenient to increase and decrease extension rod, can be picked and placeed by video probe.
Beneficial effect of the present invention is:
The present invention adopts segmentation structure, subtracts the video check that an elongated segment bar can carry out next region after having checked one section of region by increasing or tearing open.Meanwhile, extension rod top adopts open type structure, arranges a turnover cover plate on top, can ensure to increase or tear open under the prerequisite not adjusting video probe position to subtract extension rod.Guide channel of the present invention adopts upper and lower double-layer structure, can realize video probe and foreign body grabbing instrument in same hand hole co-operating, increase work efficiency.
Accompanying drawing explanation
Fig. 1 is front view of the present invention;
Fig. 2 is that the present invention is along A to cut-open view;
Fig. 3 is the structural representation of Fig. 1 medium-height trestle;
Fig. 4 is the structural representation of turnbarrel in Fig. 1.
Fig. 5 is the side view of turnbarrel in Fig. 1.
Fig. 6 is the structural representation of extension rod in Fig. 1.
In figure: 1. support, 2. hex bolts, 3. turnbarrel, 4. extension rod, 5. guide pipe between pipe, 6. annular knurl microcephaly screw; 1-1. back up pad, 1-2. cylindrical shell, 1-3. strengthens structure; 3-1. front end end cover, 3-2. cylindrical shell, 3-3. rear end cap, 3-4. annular end cap, 3-5. roller bearing, 3-6. cylinder, 3-7 gripping mechanism; The 4-1. body of rod, 4-2. briquetting, 4-3. bearing pin, 4-4. cover plate; 5-1. guide pole, 5-2. bearing pin.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
A kind of steam generator secondary side tube sheet video check instrument, its structure as depicted in figs. 1 and 2, comprises support 1, turnbarrel 3 and guide pipe 5.
The structure of support 1 as shown in Figure 3, comprises back up pad 1-1 and cylindrical shell 1-2; Back up pad 1-1 is rectangle aluminium sheet, centre has manhole, rectangle both sides of the edge thickness is greater than center section and forms strip projected parts, fit with the secondary side hand hole flange bottom of steam generator, center section forms recess, avoids coming in contact with the secondary side hand hole sealing surface of steam generator causing cut; Have strip pilot hole in rectangle corner, for being connected the secondary side hand hole flange of steam generator by hex bolts 2, flange is fitted with protruding.Pilot hole is strip, can adapt to the hand hole flange of different size.
Cylindrical shell 1-2 is the cylinder of hollow, and cylindrical shell 1-2 is vertically welded in the through hole in the middle of back up pad 1-1, and cylindrical shell 1-2 and back up pad 1-1 junction are provided with strengthens structure 1-3, strengthens structure and is preferably the annulus that cross section is equilateral triangle.
The structure of turnbarrel 3, as Fig. 4 and Fig. 5, comprises front end end cover 3-1, inner core 3-2, rear end cap 3-3, roller bearing 3-5, cylinder 3-6; Inner core 3-2 is cylindric, and the diameter compatible of external diameter and cylindrical shell 1-2 closes; One end of inner core 3-2 is welded with front end end cover 3-1, and the other end is welded with rear end cap 3-3; Front end end cover 3-1 is the right cylinder being provided with cylindrical boss, the external diameter of cylindrical boss and the diameter compatible of inner core 3-2 close, the external diameter of front end end cover 3-1 is greater than the external diameter of inner core 3-2, has rectangular through holes in the middle of front end end cover 3-1, and shape of through holes adapts with guide pipe 5 profile stretching into inner core 3-2; Cylindrical boss is fixedly mounted in inner core 3-2 one end;
Rear end cap 3-3 has a round pie inner cap and an annular end cap 3-4, and the external diameter of circular inner cap and the diameter compatible of inner core 3-2 close, and be arranged on inner core 3-2 one end inner, annular end cap 3-4 is fixedly mounted on inner core 3-2 outer wall; Have rectangular through holes in the middle of the round pie inner cap of rear end cap 3-3, shape of through holes adapts with guide pipe 5 profile stretching into inner core 3-2.
Be provided with rolling structure in the through hole bottom of front end end cover 3-1, sliding friction is converted to rolling friction, reduce friction force when guide pipe 5 moves; Described rolling structure comprises roller bearing 3-5 and is arranged on the cylinder 3-6 outside roller bearing 3-5, and roller bearing 3-5 is inner at front end end cover 3-1, perpendicular to guide pipe 5 moving direction; Be provided with rolling structure equally in the through hole bottom of rear end cap 3-3, sliding friction is converted to rolling friction, reduce friction force when guide pipe 5 moves; Described rolling structure comprises roller bearing 3-5 and is arranged on the cylinder 3-6 outside roller bearing 3-5, and roller bearing 3-5 is inner at rear end cap 3-3, perpendicular to guide pipe 5 moving direction.
Front end end cover 3-1 through hole edge is provided with gripping mechanism 3-7, for the position of fixed guide pipe 5, avoids mobile.Described gripping mechanism 3-7 is the two or four ear block being symmetricly set on through hole edge, has through hole in the middle of ear block, and guide pipe 5 is fixed through through hole by annular knurl microcephaly screw 6.
During installation, first cylindrical shell 1-2 is passed in the rear end of inner core 3-2, be then welded on outside the barrel of inner core 3-2 rear end by the annular end cap 3-4 of rear end cap 3-3, inner core 3-2 freely can rotate in cylindrical shell 3-1.
Guide pipe 5 main body is the square body of a segment length, and through the through hole of turnbarrel 3 front end face 3-1 and rear end face 3-3, the outside of turnbarrel 3 front end face 3-1 and rear end face 3-3 is exposed at two ends respectively, can be axially movable along turnbarrel 3; Guide pipe 5 inside is provided with one piece of dividing plate, the interior bone of guide pipe 5 is divided into two parts, and top is video probe passage, and bottom is foreign body grabbing passage; The part body that guide pipe 5 exposes rear end face 3-3 is elbow, and its angle of bend and direction are determined according to actual needs.
When assembling, before rear end cap 3-3 welds with turnbarrel 3, first turnbarrel 3 inner core 3-2 being nested in inside cylindrical shell 1-2, again rear end cap 3-3 being welded with the inner core 3-2 of turnbarrel 3 after completing.Now, turnbarrel 3 can rotate freely and can not seesaw in cylindrical shell 1-2.
In use, first the rear end of guide pipe 5 straight length side from turnbarrel 3 is sent into, then by support 1, turnbarrel 3, guide pipe 5 entirety by hex bolts 2 fastening by the hand hole flange face of the pilot hole in back up pad 1-1 and steam generator.For preventing inspection bar in video check process from moving forward and backward, annular knurl microcephaly screw 6 can be used to be fixed by inspection bar by the screw in turnbarrel 3.
Embodiment 2
Inspection area and hand hole flange face distant time, guide pipe 5 length limited, cause arriving the region that needs check, therefore the present embodiment is on the basis of embodiment 1, increases arrange one or more snippets extension rod 4 in guide pipe 5 front end.
Extension rod 4 is the square body of rod 4-1 of a segment length, its structure as shown in Figure 6, through the through hole of turnbarrel 3 front end face 3-1 and rear end face 3-3, the outside of turnbarrel 3 front end face 3-1 and rear end face 3-3 is exposed at two ends respectively, can be axially movable along turnbarrel 3; Body of rod 4-1 inside is provided with one piece of dividing plate, and body of rod 4-1 interior bone is divided into two parts, and top is video probe passage, and bottom is foreign body grabbing passage; Body of rod 4-1 fore-end internal diameter increases, and rear end part external diameter and front section diameter compatible close, and making between multistage extension rod 4 can grafting; Body of rod 4-1 top is the cover plate 4-4 that can overturn, and along the upset of body of rod 4-1 circumference, when being convenient to increase and decrease extension rod 4, can be picked and placeed by video probe.Briquetting 4-2 and bearing pin 4-3 is arranged on cover plate 4-4, for realizing turning function.
Multistage extension rod 4 connects successively, and then with guide pipe 5 grafting, the inside and outside wall size of extension rod 4 is identical with guide pipe 5, and partition position is identical.After installation, the video probe passage of video probe from extension rod and guide pipe composition is sent into, starts the work of tube sheet video check.Suitably should increase and decrease extension rod according to the distance of video check region and hand hole flange in video check operation, while suitably to adjust the angle of turnbarrel according to the vertical range of inspection area and center piping lane.
Above embodiments of the invention are explained in detail, above-mentioned embodiment is only optimum embodiment of the present invention, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (10)
1. a steam generator secondary side tube sheet video check instrument, is characterized in that: comprise support (1), turnbarrel (3) and guide pipe (5);
Support (1) comprises back up pad (1-1) and cylindrical shell (1-2); Back up pad (1-1) is rectangle aluminium sheet, and centre has manhole; Have pilot hole in rectangle corner, hex bolts (2) connects the secondary side hand hole flange of steam generator through pilot hole; The cylinder that cylindrical shell (1-2) is hollow, cylindrical shell (1-2) is vertically welded in the through hole in the middle of back up pad (1-1);
Turnbarrel (3) comprises front end end cover (3-1), inner core (3-2), rear end cap (3-3), roller bearing (3-5) and cylinder (3-6); Inner core (3-2) is cylindric, and the diameter compatible of external diameter and cylindrical shell (1-2) closes; One end of inner core (3-2) is welded with front end end cover (3-1), and the other end is welded with rear end cap (3-3); Front end end cover (3-1) is for being provided with the right cylinder of cylindrical boss, the diameter compatible of the external diameter of cylindrical boss and inner core (3-2) closes, the external diameter of front end end cover (3-1) is greater than the external diameter of inner core (3-2), have through hole in the middle of front end end cover (3-1), shape of through holes adapts with guide pipe (5) profile stretching into inner core (3-2); The cylindrical boss of front end end cover (3-1) is fixedly mounted in inner core (3-2) one end;
Rear end cap (3-3) has a round pie inner cap and an annular end cap (3-4), the diameter compatible of the external diameter of circular inner cap and inner core (3-2) closes, be arranged on inner core (3-2) one end inner, annular end cap (3-4) is fixedly mounted on inner core (3-2) outer wall; Have a through hole in the middle of the round pie inner cap of rear end cap (3-3), shape of through holes adapts with guide pipe (5) profile stretching into inner core (3-2);
Guide pipe (5) main body is the square body of a segment length, and through the through hole of turnbarrel (3) front end face (3-1) and rear end face (3-3), two ends expose turnbarrel (3) front end face (3-1) and rear end face (3-3) respectively; Guide pipe (5) inside is provided with one piece of dividing plate, and the interior bone of guide pipe (5) is divided into two parts, and top is video probe passage, and bottom is foreign body grabbing passage; The part body that guide pipe (5) exposes rear end face (3-3) is elbow, and its angle of bend and direction are determined according to actual needs.
2. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 1, it is characterized in that: the rectangle both sides of the edge thickness of described back up pad (1-1) is greater than center section and forms strip projected parts, fits with the secondary side hand hole flange bottom of steam generator.
3. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 1, is characterized in that: described cylindrical shell (1-2) and back up pad (1-1) junction are provided with strengthens structure (1-3).
4. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 1, it is characterized in that: the through hole bottom of described front end end cover (3-1) is provided with rolling structure, sliding friction is converted to rolling friction, reduces friction force when guide pipe (5) moves; Be provided with rolling structure equally in the through hole bottom of rear end cap (3-3), sliding friction is converted to rolling friction, reduce friction force when guide pipe (5) moves.
5. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 4, it is characterized in that: described rolling structure comprises roller bearing (3-5) and is arranged on roller bearing (3-5) cylinder outward (3-6), roller bearing (3-5) is separately positioned on front end end cover (3-1) and rear end cap (3-3) is inner, perpendicular to guide pipe (5) moving direction.
6. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 1, is characterized in that: described front end end cover (3-1) through hole edge is provided with gripping mechanism (3-7), for the position of fixed guide pipe (5).
7. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 6, it is characterized in that: described gripping mechanism is the two or four ear block being symmetricly set on through hole edge, have through hole in the middle of ear block, guide pipe (5) is fixed through through hole by screw (6).
8. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 1, it is characterized in that: the increase of described guide pipe (5) front end arranges one or more snippets extension rod connected successively (4), the inside and outside wall size of extension rod (4) is identical with guide pipe (5), and partition position is identical.
9. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 8, it is characterized in that: described extension rod (4) is the square body of rod of a segment length (4-1), through the through hole of turnbarrel (3) front end face (3-1) and rear end face (3-3), the outside of turnbarrel (3) front end face (3-1) and rear end face (3-3) is exposed at two ends respectively; The body of rod (4-1) fore-end internal diameter increases, and rear end part external diameter and front section diameter compatible close, and making can grafting between multistage extension rod (4).
10. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 8, it is characterized in that: the described body of rod (4-1) top is provided with one piece of dividing plate, the body of rod (4-1) interior bone is divided into two parts, and top is video probe passage, and bottom is foreign body grabbing passage; The body of rod (4-1) top is the cover plate (4-4) that can overturn, can along the upset of the body of rod (4-1) circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751063.6A CN104749183B (en) | 2013-12-30 | 2013-12-30 | A kind of steam generator secondary side tube sheet video check instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751063.6A CN104749183B (en) | 2013-12-30 | 2013-12-30 | A kind of steam generator secondary side tube sheet video check instrument |
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| Publication Number | Publication Date |
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| CN104749183A true CN104749183A (en) | 2015-07-01 |
| CN104749183B CN104749183B (en) | 2017-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310751063.6A Active CN104749183B (en) | 2013-12-30 | 2013-12-30 | A kind of steam generator secondary side tube sheet video check instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540909A (en) * | 2018-12-21 | 2019-03-29 | 核动力运行研究所 | One kind being used for steam generator tube sheet outer ring corridor video check guiding device |
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| CN85106507A (en) * | 1985-08-29 | 1987-03-11 | 西屋电气公司 | Improved model steam generator |
| EP0635158A1 (en) * | 1992-04-08 | 1995-01-25 | R. Brooks Associates, Inc. | Support plate inspection device |
| CN101936679A (en) * | 2009-07-01 | 2011-01-05 | 韩电Kps株式会社 | Apparatus for visually inspecting and removing foreign object in gaps of bundle of heating tubes of upper portion of tube sheet of secondary side of steam generator |
| CN103003887A (en) * | 2009-05-27 | 2013-03-27 | R.布鲁克斯合伙人公司 | Steam generator upper bundle inspection tools |
| CN203658280U (en) * | 2013-12-30 | 2014-06-18 | 中核武汉核电运行技术股份有限公司 | Secondary side tube plate video inspection tool for steam generator |
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2013
- 2013-12-30 CN CN201310751063.6A patent/CN104749183B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106507A (en) * | 1985-08-29 | 1987-03-11 | 西屋电气公司 | Improved model steam generator |
| EP0635158A1 (en) * | 1992-04-08 | 1995-01-25 | R. Brooks Associates, Inc. | Support plate inspection device |
| CN103003887A (en) * | 2009-05-27 | 2013-03-27 | R.布鲁克斯合伙人公司 | Steam generator upper bundle inspection tools |
| CN101936679A (en) * | 2009-07-01 | 2011-01-05 | 韩电Kps株式会社 | Apparatus for visually inspecting and removing foreign object in gaps of bundle of heating tubes of upper portion of tube sheet of secondary side of steam generator |
| CN203658280U (en) * | 2013-12-30 | 2014-06-18 | 中核武汉核电运行技术股份有限公司 | Secondary side tube plate video inspection tool for steam generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109540909A (en) * | 2018-12-21 | 2019-03-29 | 核动力运行研究所 | One kind being used for steam generator tube sheet outer ring corridor video check guiding device |
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