CN209821082U - Video inspection guiding tool for first supporting plate of steam generator - Google Patents
Video inspection guiding tool for first supporting plate of steam generator Download PDFInfo
- Publication number
- CN209821082U CN209821082U CN201822182086.0U CN201822182086U CN209821082U CN 209821082 U CN209821082 U CN 209821082U CN 201822182086 U CN201822182086 U CN 201822182086U CN 209821082 U CN209821082 U CN 209821082U
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- Prior art keywords
- guide
- steam generator
- supporting
- support
- guide rail
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- Withdrawn - After Issue
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- 238000007689 inspection Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000011179 visual inspection Methods 0.000 claims 9
- 230000003749 cleanliness Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The utility model belongs to the technical field of nuclear power plant's steam generator overhauls, to the first backup pad video inspection demand of nuclear power plant's steam generator, provide a first backup pad video inspection direction instrument of steam generator of compact size, sound construction, the operation of being convenient for, aim at fills the blind area of current steam generator secondary side inspection, realizes the cleanliness video inspection of the first backup pad of steam generator. It comprises a supporting guide rail and a guide bracket; two ends of the supporting guide rail are respectively fixed on the hand hole of the steam generator and the first supporting plate and are used for providing a supporting and sliding track for the guide bracket; the guide support is arranged on the support guide rail and is in sliding connection with the support guide rail, and the upper end of the guide support extends out of the drain hole of the first support plate and is used for performing video inspection on the inter-tube area inside the steam generator.
Description
Technical Field
The utility model belongs to the technical field of nuclear power plant's steam generator overhauls, concretely relates to first backup pad video inspection guiding tool of steam generator and video inspection method.
Background
During the operation of pressurized water reactor nuclear power plant, the surface dirt and harmful impurity ions (such as Cl) in the gaps of the secondary side flow limited area of the steam generator－，SO42－，Ca2+，Mg2+，Al3+Etc.) local concentration occurs due to evaporation of water. Most of them participate in the formation of sludge deposits on the internal horizontal and vertical solid surfaces of the secondary side of the steam generator, such as the surfaces of the secondary side tube plate, the flow distribution plate, the support plate, and the external surface of the heat transfer tube. The risk of blocking the quincuncial holes is caused by the sediment of the supporting plate, and then the results of unstable reactor power of the nuclear power station, even the power reduction operation of the nuclear power station and the like are caused, so that the cleanliness condition of the nuclear power station needs to be regularly checked, and a targeted cleaning scheme is made conveniently.
At present, each domestic nuclear power unit carries out video inspection on the cleanliness condition of a secondary side tube plate of a steam generator during the period of refueling overhaul. However, due to the limitation of the secondary structure of the steam generator, the existing video inspection equipment is difficult to reach the area of the supporting plate.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the first backup pad video inspection demand of steam generator of nuclear power plant, provide a first backup pad video inspection direction instrument of steam generator of compact size, sound construction, the operation of being convenient for, aim at fills the blind area of current steam generator secondary side inspection, realizes the cleanliness video inspection of the first backup pad of steam generator.
The utility model discloses a realize like this:
a video inspection guiding tool for a first supporting plate of a steam generator comprises a supporting guide rail and a guiding bracket; two ends of the supporting guide rail are respectively fixed on the hand hole of the steam generator and the first supporting plate and are used for providing a supporting and sliding track for the guide bracket; the guide support is arranged on the support guide rail and is in sliding connection with the support guide rail, and the upper end of the guide support extends out of the drain hole of the first support plate and is used for performing video inspection on the inter-tube area inside the steam generator.
The whole supporting guide rail is L-shaped, the left part of the supporting guide rail is horizontal, the right part of the supporting guide rail extends upwards, and two ends of the supporting guide rail are respectively and fixedly connected with a positioning clamp, a fixing lug and the like; the positioning card is clamped on the first supporting plate after passing through the drain hole of the first supporting plate to form a far-end fixing point of the guiding tool; the fixing lug is fixed on a flange bolt hole of a hand hole of the steam generator through a bolt to form a near-end fixing point of the guiding tool; the support rail is used for fixing and supporting the guide tool.
The upper end face of the supporting guide rail is provided with a slide rail along the length direction, and the slide rail is matched with the guide support to realize the sliding of the guide support relative to the supporting guide rail.
The whole supporting guide rail is made of stainless steel materials.
And a plurality of round or other-shaped hollows are arranged on the supporting guide rail and used for reducing the weight of the guiding tool.
The whole guide bracket is of a hollow L-shaped structure, and the shape of the guide bracket is matched with that of the support guide rail; the front end of the guide bracket is a guide elbow, the upper end of the guide elbow extends out of the drain hole of the first supporting plate, and the lower end of the guide elbow is connected with the main body of the guide bracket through a rotary joint; the guide support is used for realizing the guide function of the video probe.
Two groups of sliding blocks are arranged at the lower side of the guide bracket, and the sliding blocks are coupled with the sliding rails on the upper end surfaces of the supporting guide rails, so that the guide bracket can freely slide relative to the supporting guide rails.
A manual operation box is arranged on the outer side of the steam generator and connected with the rotary joint through two steel wire ropes, and steering of the guide elbow is controlled through operation of the manual operation box.
The guide bracket 7 as described above is integrally made of a stainless material.
The supporting guide rail and the guide bracket are all multi-section structures, and the multi-section structures are coupled through bolts or pins.
The utility model has the advantages that:
1. the structure is compact, the operation is convenient, and the video inspection of the first supporting plate of the steam generator can be realized;
2. video inspection of the pipe-to-pipe regions of the cold side and the hot side of the first supporting plate can be respectively realized by controlling the rotation angle of the guide elbow;
3. the video inspection of different inter-pipe areas can be realized through the relative sliding of the guide bracket and the support guide rail;
4. the structure is firm and is not easy to wear.
Drawings
Fig. 1 is a schematic structural view of a video inspection guiding tool for a first support plate of a steam generator according to the present invention;
wherein: 1. the device comprises a positioning clamp, 2. a rotary joint, 3. a guide elbow, 4. a video probe, 5. a sliding block, 6. a support guide rail, 7. a guide support, 8. a fixing lug, 10. a steam generator, 11. a steam generator hand hole, 12. an inner sleeve, 13. a first support plate, 14. a first support plate water flowing hole, 15. a center pull rod and 16. a flow distribution plate.
Fig. 2 to 5 are schematic diagrams illustrating the operation of the first support plate video inspection guiding tool of the steam generator according to the present invention;
wherein: FIG. 2 is a view of the guiding tool extending into the steam generator; FIG. 3 is a view showing the guide tool fixed to the support plate; FIG. 4 is a view showing the operation of the movable guide bracket for the inspection between pipes; fig. 5 is an operational state diagram of the steering tool to another inspection of the flow holes.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in figure 1, the video inspection guide tool for the first support plate of the steam generator comprises a support guide rail 6 and a guide bracket 7. The two ends of the support rail 6 are respectively fixed on the steam generator hand hole 11 and the first support plate 13 for providing a support and a sliding track for the guide bracket 7. The guide support 7 is installed on the support guide rail 6 and is connected with the support guide rail 6 in a sliding mode, and the upper end of the guide support 7 extends out of the first support plate water flowing hole 14 and is used for conducting video inspection on the inter-pipe area inside the steam generator 10.
The whole supporting guide rail 6 is L-shaped, the left part is horizontal, the right part extends upwards, and two ends of the supporting guide rail are respectively fixedly connected with a positioning card 1, a fixing lug 8 and the like. The locator card 1 passes through the drain hole 14 of the first support plate and then is clamped on the first support plate 13, forming a far-end fixing point of the guiding tool. The fixing lug 8 is fixed by bolts to the flange bolt hole of the steam generator hand hole 11, forming the proximal fixing point of the guiding tool. The support rail 6 is used for fixing and supporting the guide tool.
The upper end surface of the support guide rail 6 is provided with a slide rail along the length direction, and the slide rail is used for being matched with the guide bracket 7 to realize the sliding of the guide bracket 7 relative to the support guide rail 6.
The whole supporting guide rail 6 is made of stainless steel materials.
A plurality of round or other-shaped hollows are arranged on the supporting guide rail 6 and used for reducing the weight of the guiding tool.
The whole guide bracket 7 is of a hollow L-shaped structure, and the shape of the guide bracket is matched with that of the support guide rail 6. The front end of the guide support 7 is a guide elbow 3, the upper end of the guide elbow 3 extends out of the water flowing hole 14 of the first support plate, and the lower end of the guide elbow 3 is connected with the main body of the guide support 7 through the rotary joint 2. The guide bracket 7 is used for realizing the guide function of the video probe.
Two groups of sliding blocks 5 are arranged on the lower side of the guide bracket 7, and the sliding blocks 5 are coupled with the sliding rails on the upper end surfaces of the support guide rails 6, so that the guide bracket 7 can freely slide relative to the support guide rails 6.
A hand-operated box is arranged on the outer side of the steam generator 10, the hand-operated box is connected with the rotary joint 2 through two steel wire ropes, and the steering of the guide elbow 3 is controlled through the operation of the hand-operated box.
The whole guide bracket 7 is made of stainless steel material.
Because the space near the steam generator hand hole 11 is limited, the supporting guide rail 6 and the guide bracket 7 are both in a multi-section structure, and the sections are coupled through bolts or pins.
The utility model discloses a use method as follows:
the method comprises the following steps: the support rail 6 together with the front part of the guide bracket 7 is fed obliquely downward into the hand hole above the flow distribution plate 16 while being fed and lifted upward until the front end enters the water flow hole 14 of the first support plate, as shown in fig. 2.
Step two: the support rail positioning card 1 is clamped on the first support plate 13, and the fixing lug 8 is fixed on the flange of the steam generator hand hole 11, as shown in fig. 3, at this time, the position of the support rail 6 is fixed.
Step three: the operating hand box controls the guide elbow 3 to rotate 90 degrees, the front end of the guide elbow 3 points to the direction between the heat transfer pipes on one side to be inspected, and the video probe 4 is sent along the guide support 7 until the detection position is reached. And horizontally pulling the guide bracket 7 outwards along the support guide rail 6 to finish the video inspection of the pipe-to-pipe area at one side of the water flowing hole one by one.
Step four: the operator operates the box to control the guide elbow 3 to rotate 180 degrees, the front end of the guide elbow 3 points to the direction between the heat transfer pipes on the other side to be inspected, the guide bracket 7 is pushed forwards along the support guide rail 6, and the video inspection of the area between the pipes on the other side is completed, as shown in figure 4.
Step five: the fixing lug 8 is released, and the whole guiding tool is pulled outwards. At this time, the locator card 1 is detached from the first support plate 13. The front end of the guiding tool is controlled to slowly droop and is separated from the water flowing hole 14 of the first supporting plate.
Step six: the whole guiding tool is horizontally moved to the position below the water flowing hole 14 of the other first supporting plate, the front end of the guiding tool is lifted to enter the water flowing hole 14 of the first supporting plate, and the supporting guide rail 6 is fixed.
Step seven: and repeating the third step and the fourth step to finish the inspection, as shown in the attached figure 5.
Step eight: and after the video inspection of the water flowing holes 14 of the three first supporting plates on one side of the steam generator 10 is finished, the whole guiding tool is transferred to the opposite side steam generator hand holes 11, and the steps from the first step to the seventh step are repeated to finish the video inspection of the opposite side first supporting plates 13.
The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the spirit and scope of the present invention by those skilled in the art. The prior art can be adopted for the content which is not described in detail in the specification of the present invention.
Claims (10)
1. The utility model provides a first backup pad video inspection guiding tool of steam generator which characterized in that: it comprises a supporting guide rail (6) and a guide bracket (7); two ends of the supporting guide rail (6) are respectively fixed on a hand hole (11) of the steam generator and a first supporting plate (13) and are used for providing a supporting and sliding track for the guide bracket (7); the guide support (7) is arranged on the support guide rail (6) and is in sliding connection with the support guide rail (6), and the upper end of the guide support (7) extends out of the water flowing holes (14) of the first support plate and is used for carrying out video inspection on the inter-tube area inside the steam generator (10).
2. The steam generator first support plate visual inspection guide tool of claim 1, wherein: the supporting guide rail (6) is L-shaped as a whole, the left part of the supporting guide rail is horizontal, the right part of the supporting guide rail extends upwards, and two ends of the supporting guide rail are fixedly connected with a positioning clamp (1) and a fixing lug (8) respectively; the positioning clamp (1) is clamped on the first supporting plate (13) after passing through the drain hole (14) of the first supporting plate to form a far-end fixing point of the guiding tool; the fixing lug (8) is fixed on a flange bolt hole of a steam generator hand hole (11) through a bolt to form a near-end fixing point of the guiding tool; the supporting guide rail (6) is used for fixing and supporting the guiding tool.
3. The steam generator first support plate visual inspection guide tool of claim 2, wherein: the upper end face of the supporting guide rail (6) is provided with a sliding rail along the length direction, and the sliding rail is matched with the guide bracket (7) to realize the sliding of the guide bracket (7) relative to the supporting guide rail (6).
4. The steam generator first support plate visual inspection guide tool of claim 1, wherein: the supporting guide rail (6) is integrally made of stainless steel materials.
5. The steam generator first support plate visual inspection guide tool of claim 1, wherein: a plurality of round hollows are arranged on the supporting guide rail (6) and used for reducing the weight of the guiding tool.
6. The steam generator first support plate visual inspection guide tool of claim 3, wherein: the whole guide bracket (7) is of a hollow L-shaped structure, and the shape of the guide bracket is matched with that of the support guide rail (6); the front end of the guide support (7) is a guide elbow (3), the upper end of the guide elbow (3) extends out of a drain hole (14) of the first support plate, and the lower end of the guide elbow (3) is connected with the main body of the guide support (7) through a rotary joint (2); the guide support (7) is used for realizing the guide function of the video probe.
7. The steam generator first support plate visual inspection guide tool of claim 6, wherein: two groups of sliding blocks (5) are arranged on the lower side of the guide support (7), and the sliding blocks (5) are coupled with the sliding rails on the upper end surfaces of the supporting guide rails (6) so that the guide support (7) can freely slide relative to the supporting guide rails (6).
8. The steam generator first support plate visual inspection guide tool of claim 6, wherein: a hand-operated box is arranged on the outer side of the steam generator (10), the hand-operated box is connected with the rotary joint (2) through two steel wire ropes, and steering control of the guide elbow (3) is achieved through operation of the hand-operated box.
9. The steam generator first support plate visual inspection guide tool of claim 1, wherein: the whole guide bracket (7) is made of stainless steel materials.
10. The steam generator first support plate visual inspection guide tool of claim 1, wherein: the supporting guide rail (6) and the guide bracket (7) are both of multi-section structures, and the multi-section structures are coupled through bolts or pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822182086.0U CN209821082U (en) | 2018-12-21 | 2018-12-21 | Video inspection guiding tool for first supporting plate of steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822182086.0U CN209821082U (en) | 2018-12-21 | 2018-12-21 | Video inspection guiding tool for first supporting plate of steam generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209821082U true CN209821082U (en) | 2019-12-20 |
Family
ID=68869773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822182086.0U Withdrawn - After Issue CN209821082U (en) | 2018-12-21 | 2018-12-21 | Video inspection guiding tool for first supporting plate of steam generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209821082U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540908A (en) * | 2018-12-21 | 2019-03-29 | 核动力运行研究所 | Steam generator the first support plate video check steering tool and video check method |
-
2018
- 2018-12-21 CN CN201822182086.0U patent/CN209821082U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540908A (en) * | 2018-12-21 | 2019-03-29 | 核动力运行研究所 | Steam generator the first support plate video check steering tool and video check method |
| CN109540908B (en) * | 2018-12-21 | 2024-03-19 | 核动力运行研究所 | Video inspection guiding tool and video inspection method for first supporting plate of steam generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191220 Effective date of abandoning: 20240319 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20191220 Effective date of abandoning: 20240319 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |