CN203658280U - Secondary side tube plate video inspection tool for steam generator - Google Patents
Secondary side tube plate video inspection tool for steam generator Download PDFInfo
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- CN203658280U CN203658280U CN201320889956.2U CN201320889956U CN203658280U CN 203658280 U CN203658280 U CN 203658280U CN 201320889956 U CN201320889956 U CN 201320889956U CN 203658280 U CN203658280 U CN 203658280U
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- guide pipe
- secondary side
- rear end
- steam generator
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Abstract
The utility model belongs to the technical field of tools special for video inspection of nuclear power equipment and in particular relates to a secondary side tube plate video inspection tool for a steam generator. The secondary side tube plate video inspection tool comprises a bracket (1), a rotating sleeve (3) and a guide pipe (5), wherein the bracket (1) comprises a supporting plate (1-1) and a cylinder (1-2); the rotating sleeve (3) comprises a front end cover (3-1), an inner barrel (3-2), a rear end cover (3-3), a roller shaft (3-5) and a roller (3-6); a main body of the guide pipe (5) is a section of rectangular tube, the guide pipe penetrates through the through holes formed in the front end cover (3-1) and the rear end cover (3-3) of the rotating sleeve (3), and two ends of the guide pipe are respectively exposed out of the front end cover (3-1) and the rear end cover (3-3) of the rotating sleeve (3); the tube body on a part, which is exposed out of the rear end cover (3-3), of the guide pipe (5) is an elbow, and the bending angle and direction of the elbow are determined according to actual needs. The video inspection tool has the beneficial effects that a guide channel of the tool adopts a structure comprising an upper layer and a lower layer, a video probe and a foreign matter grabbing tool can be cooperatively operated in the same hand hole, and the working efficiency is improved.
Description
Technical field
The utility model belongs to nuclear power generating equipment video check specific purpose tool technical field, is 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.Start to the operation phase from the Installation and Debugging stage, some metals and non-metal foreign body residual in pipeline are washed in steam generator secondary side.In steam generator secondary side operational process, the foreign matter that enters secondary side will clash into heat-transfer pipe under the drive of high-velocity flow, when serious, can cause heat-transfer pipe breakage, causes the leakage of primary side fluid.Therefore, both at home and abroad steam generator secondary side tube sheet video check is paid much attention to.Meanwhile, can understand the deposition situation of steam generator secondary side body refuse and corrosion by the work of tube sheet video check, the effect to steam generator hydrodynamic cleaning and nuclear power station secondary side water chemistry control situation all have certain reference significance.Domestic existing tube sheet video check instrument uses nylon lath and plastic tube to realize support and the guiding to video probe, because steam generator board size is larger, in tube sheet video check process, needs probe to take out and change checking tool completely.The tool operation of domestic existing tube sheet video check, use difficulty larger, operator is had relatively high expectations.Simultaneously, in the time 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.
Utility model content
The purpose of this utility model is for technical matterss such as existing checking tool operation easier are large, and a kind of steam generator secondary side tube sheet video check instrument is provided.
The technical scheme that realizes the utility model object 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; Have pilot hole four jiaos of rectangles, for connect the secondary side hand hole flange of steam generator by hex bolts; 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 external diameter matches with the internal diameter of cylindrical shell; 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 that is provided with cylindrical boss, and the external diameter of cylindrical boss matches with the internal diameter of inner core, 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 that stretches 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 matches with the internal diameter of inner core, is arranged on inside, inner core one end, and annular end cap is fixedly mounted on inner tank theca; In the middle of the round pie inner cap of rear end cap, have a through hole, shape of through holes adapts with the guide pipe profile that stretches 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, turnbarrel front end face and rear end face are exposed respectively in two ends; Guide pipe inside is provided with a dividing plate, and 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 with the secondary side hand hole flange bottom laminating 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, the friction force when reducing guide pipe and moving; Through hole bottom at rear end cap is provided with rolling structure equally, and sliding friction is converted to rolling friction, the friction force when reducing guide pipe and moving;
Described rolling structure comprises roller bearing and be arranged on the cylinder outside roller bearing, and roller bearing is in front end end cover and rear end cap inside, 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 piece that is symmetricly set on through hole edge, has through hole in the middle of ear piece, and annular knurl microcephaly screw is fixed guide pipe through through hole.
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 respectively at two ends, can axially move forward and backward along turnbarrel.
Described body of rod top is provided with a dividing plate, and 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 matches with leading portion part internal diameter, makes can peg graft between multistage extension rod; Body of rod top is the cover plate that can overturn, and can circumferentially overturn along the body of rod, while being convenient to increase and decrease extension rod, video probe is picked and placeed.
The beneficial effects of the utility model are:
The utility model adopts segmentation structure, has checked behind one section of region by increasing or tearing the video check that subtracts an elongated segment bar and can carry out next region open.Meanwhile, extension rod top adopts open type structure, and a turnover cover plate is set on top, can guarantee to increase or tear open under the prerequisite of not adjusting video probe position to subtract extension rod.Guide channel of the present utility model adopts upper and lower double-layer structure, can realize video probe and foreign body grabbing instrument in same hand hole co-operating, increases work efficiency.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model;
Fig. 2 is that the utility model 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 utility model 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, secondary side hand hole flange bottom laminating with steam generator, center section forms recess, avoids coming in contact and causing cut with the secondary side hand hole sealing surface of steam generator; Have strip pilot hole four jiaos of rectangles, for connect the secondary side hand hole flange of steam generator by hex bolts 2, make flange and projection laminating.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 external diameter matches with the internal diameter of cylindrical shell 1-2; 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 that is provided with cylindrical boss, the external diameter of cylindrical boss matches with the internal diameter of inner core 3-2, 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 profiles that stretch 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 matches with the internal diameter of inner core 3-2, is arranged on inside, inner core 3-2 one end, and annular end cap 3-4 is fixedly mounted on inner core 3-2 outer wall; In the middle of the round pie inner cap of rear end cap 3-3, have rectangular through holes, shape of through holes adapts with guide pipe 5 profiles that stretch into inner core 3-2.
Through hole bottom at front end end cover 3-1 is provided with rolling structure, and sliding friction is converted to rolling friction, the friction force when reducing guide pipe 5 and moving; Described rolling structure comprises roller bearing 3-5 and be arranged on the cylinder 3-6 outside roller bearing 3-5, and roller bearing 3-5 is in front end end cover 3-1 inside, perpendicular to guide pipe 5 moving directions; Through hole bottom at rear end cap 3-3 is provided with rolling structure equally, and sliding friction is converted to rolling friction, the friction force when reducing guide pipe 5 and moving; Described rolling structure comprises roller bearing 3-5 and be arranged on the cylinder 3-6 outside roller bearing 3-5, and roller bearing 3-5 is in rear end cap 3-3 inside, perpendicular to guide pipe 5 moving directions.
Be provided with gripping mechanism 3-7 at front end end cover 3-1 through hole edge, for the position of fixed guide pipe 5, avoid mobile.Described gripping mechanism 3-7 is the two or four ear piece that is symmetricly set on through hole edge, has through hole in the middle of ear piece, and annular knurl microcephaly screw 6 is fixed guide pipe 5 through through hole.
When installation, first cylindrical shell 1-2 is passed in the rear end of inner core 3-2, then the annular end cap 3-4 of rear end cap 3-3 is welded on to barrel outside, inner core 3-2 rear end, inner core 3-2 can freely rotate in cylindrical shell 3-1.
In the time of assembling, before rear end cap 3-3 and turnbarrel 3 welding, first turnbarrel 3 inner core 3-2 are nested in to cylindrical shell 1-2 inner side, after completing, again the inner core 3-2 of rear end cap 3-3 and turnbarrel 3 is welded.Now, turnbarrel 3 can rotate freely and can not seesaw in cylindrical shell 1-2.
In use, first guide pipe 5 straight length one sides are sent into from the rear end of turnbarrel 3, then by fastening by the hand hole flange face of the pilot hole in back up pad 1-1 and steam generator by hex bolts 2 support 1, turnbarrel 3, guide pipe 5 entirety.For preventing that in video check process, inspection bar moves forward and backward, can use annular knurl microcephaly screw 6 by the screw in turnbarrel 3, inspection bar to be fixed.
Embodiment 2
At inspection area and hand hole flange face, when distant, guide pipe 5 length limited, cause arriving the region that needs check, therefore the present embodiment, on the basis of embodiment 1, arranges one or more snippets extension rod 4 in guide pipe 5 front end increases.
Above embodiment of the present utility model is explained in detail, above-mentioned embodiment is only optimum embodiment of the present utility model, but the utility model is not limited to above-described embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make various variations.
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 four jiaos of rectangles, 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 external diameter matches with the internal diameter of cylindrical shell (1-2); 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 external diameter of cylindrical boss matches with the internal diameter of inner core (3-2), the external diameter of front end end cover (3-1) is greater than the external diameter of inner core (3-2), in the middle of front end end cover (3-1), have through hole, shape of through holes adapts with guide pipe (5) profile that stretches 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 external diameter of circular inner cap matches with the internal diameter of inner core (3-2), be arranged on inner core (3-2) inside, one end, annular end cap (3-4) is fixedly mounted on inner core (3-2) outer wall; In the middle of the round pie inner cap of rear end cap (3-3), have a through hole, shape of through holes adapts with guide pipe (5) profile that stretches 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), turnbarrel (3) front end face (3-1) and rear end face (3-3) are exposed respectively in two ends; Guide pipe (5) inside is provided with a 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, with the secondary side hand hole flange bottom laminating 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) is provided with and strengthens structure (1-3) with back up pad (1-1) junction.
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, the friction force while reducing guide pipe (5) movement; Through hole bottom at rear end cap (3-3) is provided with rolling structure equally, and sliding friction is converted to rolling friction, the friction force while reducing guide pipe (5) movement.
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 the outer cylinder (3-6) of roller bearing (3-5), roller bearing (3-5) is separately positioned on front end end cover (3-1) and rear end cap (3-3) inside, 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 piece that is symmetricly set on through hole edge, in the middle of ear piece, have through hole, screw (6) is fixing by guide pipe (5) through through hole.
8. a kind of steam generator secondary side tube sheet video check instrument as claimed in claim 1, it is characterized in that: described guide pipe (5) front end increase arranges one or more snippets extension rod connecting 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 respectively at two ends; The body of rod (4-1) fore-end internal diameter increases, and rear end part external diameter matches with leading portion part internal diameter, makes can peg graft 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 a 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, and can circumferentially overturn along the body of rod (4-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889956.2U CN203658280U (en) | 2013-12-30 | 2013-12-30 | Secondary side tube plate video inspection tool for steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889956.2U CN203658280U (en) | 2013-12-30 | 2013-12-30 | Secondary side tube plate video inspection tool for steam generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658280U true CN203658280U (en) | 2014-06-18 |
Family
ID=50924657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320889956.2U Withdrawn - After Issue CN203658280U (en) | 2013-12-30 | 2013-12-30 | Secondary side tube plate video inspection tool for steam generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203658280U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749183A (en) * | 2013-12-30 | 2015-07-01 | 中核武汉核电运行技术股份有限公司 | Video inspection tool for secondary side tube plate of steam generator |
-
2013
- 2013-12-30 CN CN201320889956.2U patent/CN203658280U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749183A (en) * | 2013-12-30 | 2015-07-01 | 中核武汉核电运行技术股份有限公司 | Video inspection tool for secondary side tube plate of steam generator |
| CN104749183B (en) * | 2013-12-30 | 2017-07-14 | 中核武汉核电运行技术股份有限公司 | A kind of steam generator secondary side tube sheet video check instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140618 Effective date of abandoning: 20170714 |
|
| AV01 | Patent right actively abandoned |