CN203617000U - Eddy current testing device for fuel rod - Google Patents
Eddy current testing device for fuel rod Download PDFInfo
- Publication number
- CN203617000U CN203617000U CN201320704188.9U CN201320704188U CN203617000U CN 203617000 U CN203617000 U CN 203617000U CN 201320704188 U CN201320704188 U CN 201320704188U CN 203617000 U CN203617000 U CN 203617000U
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- CN
- China
- Prior art keywords
- eddy current
- fuel rod
- guide cylinder
- installing plate
- telescoping mechanism
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Monitoring And Testing Of Nuclear Reactors (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model provides an eddy current testing device for a fuel rod. The device comprises a guide cylinder, an installation plate, a driving device, a telescoping mechanism and an eddy current probe, wherein a through hole is formed in the installation plate, the guide cylinder is installed at the upper end of the installation plate and coaxial with the through hole, the driving device is installed at the lower end of the installation plate and connected with the telescoping mechanism, the motion direction of the telescoping mechanism is perpendicular to the axis of the guide cylinder and in a radial extension line of the guide cylinder, and one end of the telescoping mechanism is connected with the eddy current probe; the eddy current probe moves horizontally between a working position and a non-working position under the drive of the telescoping mechanism, and the eddy current probe is coaxial with the guide cylinder when being located in the working position. The device is connected with a fuel rod replacing device through the guide cylinder, on-line testing on the fuel rod is realized on the fuel rod replacing device, and the fuel rod can be directly repaired or replaced in case of a failure after being tested, so that the operating time is saved, and the operating difficulty is reduced; and the device is reliable in motion and high in accuracy.
Description
Technical field
The utility model relates to a kind of nuclear power station detection field, relates in particular to a kind of fuel rod eddy current testing device.
Background technology
Fuel assembly in nuclear power station comprises that many are arranged and be fixed on the fuel rod in reactor according to certain intervals.Described fuel rod during reactor operation for a long time in high temperature, high pressure, highly radioactive state, add the impact of reactor core foreign matter, vibration, water impact, fuel rod easily produces damaged and leaks, judge so need regularly fuel rod to be carried out to breakage, damaged fuel rod needs to repair in time or change.
A damaged key link of judging is need to carry out breakage to fuel rod by a set of eddy current testing device to detect, but fuel rod testing environment is in high radioactivity region, like this location of eddy current probe and installation has been proposed to very high requirement.The eddy current testing device complex structure, manipulation inconvenience, the efficiency that now use are not high, and testing staff need to detect fuel rod near reactor, can cause Health cost like this to testing staff, simultaneously, because fuel rod belongs to thin long round parts and have a lot of roots in reactor, need refuelling rod so just eddy current testing device need to be pulled down again and with fuel rod replacing device, problematic fuel rod be changed if found in the time detecting, detecting and change need of work separately carries out, can increase so undoubtedly testing staff's workload, increase the working time, and input also can further improve, so in order to guarantee the economy of fuel rod reparation and replacing and the reliability of detection, testing staff imagination when fuel rod promotes and declines, carry out detection of dynamic and can with the pick-up unit that more changes jobs and combine, but also do not have at present a kind ofly can reach the pick-up unit of taking into account accuracy of detection and detection time.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of fuel rod eddy current testing device reliable, easy to operate, that save the working time that moves, to overcome the above-mentioned defect of prior art.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of fuel rod eddy current testing device, comprise guide cylinder, installing plate, drive unit, telescoping mechanism and eddy current probe, installing plate is provided with a through hole, described guide cylinder is arranged on installing plate upper end coaxial with through hole, described drive unit is arranged on the lower end of installing plate, drive unit is connected with telescoping mechanism, the direction of motion of telescoping mechanism is vertical with the axis of guide cylinder and on guide cylinder extended line radially, and the end of telescoping mechanism is connected with eddy current probe; Under the drive of telescoping mechanism, eddy current probe translation between a working position and an off-position, eddy current probe is coaxial with guide cylinder in the time of working position.
Preferably, described drive unit is cylinder, described telescoping mechanism comprises the guide rail and the slide bar that match, the direction of motion of described cylinder piston rod is consistent with the direction of motion of slide bar, described guide rail is connected with installing plate by a base, and guide rail is parallel with installing plate, one end of described slide bar is connected with the piston rod of cylinder by connecting link, the other end is connected with eddy current probe, one end of described connecting link has the first elongated slot vertically, the middle part of connecting link has the second elongated slot vertically, the piston rod of described cylinder matches with the first elongated slot of connecting link by the first sliding pin, described slide bar matches with the second elongated slot by the second sliding pin, the other end and the guide rail of connecting link are hinged.
Further, described connecting link is provided with two.
Preferably, described eddy current probe is circular.
Preferably, the upper end of described installing plate is provided with multiple support bars perpendicular to installing plate, and the two ends of described support bar are equipped with external thread, and the lower end of support bar is threaded with installing plate, and the upper end of support bar is furnished with set nut.
Further, the length of described support bar is greater than the length of guide cylinder.
Preferably, the upper end of described guide cylinder is provided with internal thread.
As mentioned above, a kind of fuel rod eddy current testing device of the utility model, has following beneficial effect:
This device is connected with fuel rod replacing device by guide cylinder, realizes the online detection to fuel rod on fuel rod replacing device, and the fuel rod after detection has problem directly place under repair or change, and saves running time and operation easier; And the motion of this device eddy current probe is to complete by the cooperation between cylinder, connecting link and slide bar, motion is reliable, and precision is high, and the stroke of slide bar is adjustable, debugging and easy to maintenance.This device adopts air cylinder driven, and operated from a distance is convenient, noise is little, and pneumatic medium can not pollute reactor circuit cooling medium simultaneously.
Accompanying drawing explanation
Fig. 1 is the utility model the first embodiment schematic diagram.
Fig. 2 is A-A place sectional view in Fig. 1.
Fig. 3 is the working state schematic representation of Fig. 1.
Fig. 4 is the utility model the second embodiment simplified schematic diagram.
Fig. 5 is the third embodiment simplified schematic diagram of the utility model.
In figure: 1 guide cylinder 2 installing plates
3 drive unit 4 bases
5 eddy current probe 7 connecting links
8 support bar 9 fuel rods
21 through hole 31 piston rods
61 guide rail 62 slide bars
63 drive tooth bar 64 gears
65 driving rack 66 leading screws
67 feed rod 68 sliding nuts
71 first elongated slot 72 second elongated slots
81 set nut 711 first sliding pins
721 second sliding pins
Embodiment
Structure that Figure of description illustrates, ratio, size etc., all contents in order to coordinate instructions to disclose only, understand and read for person skilled in the art scholar, not in order to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, all should still drop in the scope that technology contents that the utility model discloses can contain.Simultaneously, in this instructions, quote as " on ", the term such as D score, 'fornt', 'back', " centre ", also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, changing under technology contents, when being also considered as the enforceable category of the utility model without essence.
If Fig. 1 and Fig. 3 are the first embodiment schematic diagram and the working state schematic representation of a kind of fuel rod eddy current testing device of the utility model, this device comprises guide cylinder 1, installing plate 2, drive unit 3, telescoping mechanism and eddy current probe 5, installing plate 2 is provided with a through hole 21, described guide cylinder 1 hollow to be arranged on installing plate 2 upper ends coaxial with through hole 21, described drive unit 3 is arranged on the lower end of installing plate 2, described drive unit 3 is connected with telescoping mechanism, the axis of the direction of motion of telescoping mechanism and guide cylinder 1 is vertical and on guide cylinder 1 extended line radially, the end of telescoping mechanism is connected with eddy current probe 5.Under the drive of telescoping mechanism, eddy current probe 5 translation between a working position and an off-position, eddy current probe 5 is coaxial with guide cylinder 1 in the time of working position.Eddy current probe 5 in the utility model is circular, in the time detecting fuel rod 9, is inserted in from one end of fuel rod 9, and the outer wall of fuel rod 9 is carried out to omnibearing detection.
The connected mode of described telescoping mechanism and eddy current probe 5 has multiple, for example: bolt connection, pin connection etc.On the eddy current probe 5 described in this enforcement, be provided with soldering opening, eddy current probe 5 welds together by soldering opening and telescoping mechanism.
In the present embodiment, described drive unit 3 is cylinders, select cylinder to be because gas cylinder working condition is stable, and while using cylinder, its discharge and suction is all gas, can not impact equipment around, also be convenient to realize safety interlocking with fuel rod replacing device, increase the security of operation simultaneously.In conjunction with Fig. 1 and Fig. 2, telescoping mechanism described in the present embodiment comprises the guide rail 61 and the slide bar 62 that match, the direction of motion of the piston rod 31 of described cylinder is consistent with the direction of motion of slide bar 62, described guide rail 61 is connected with installing plate 2 by a base 4, and guide rail 61 is parallel with installing plate 2, one end of described slide bar 62 is connected with the piston rod 31 of cylinder by connecting link 7, and the other end is connected with eddy current probe 5.One end of wherein said connecting link 7 has the first elongated slot 71 vertically, the middle part of connecting link 7 has the second elongated slot 72 vertically, the piston rod 31 of described cylinder matches with the first elongated slot 71 of connecting link 7 by the first sliding pin 711, described slide bar 62 matches with the second elongated slot 72 by the second sliding pin 721, and the other end of connecting link 7 and guide rail 61 are hinged.Further, in order to guarantee the steady of motion, described connecting link 7 is provided with two, and two connecting links 7 match with the two ends of the first sliding pin 711, the second sliding pin 721 respectively, the first sliding pin 711 is located in the end of piston rod 31, and the second sliding pin 721 is located in the end of slide bar 62.In the present embodiment; described installing plate 2 is strip; guide cylinder 1 is in a side upper end of installing plate 2; cylinder is arranged on installing plate 2 opposite side lower ends; and the piston rod 31 of cylinder is not towards guide cylinder 1 one sides; can increase like this move distance of slide bar 62, what can make that eddy current probe 5 bounces back is more, is more conducive to the protection of eddy current probe 5.When piston rod 31 does while stretching out with retracting motion, connecting link 7 can move by band moving slide-bars 62 together.
In described guide rail 61, be also provided with limited block (not marking in figure), limited block prevents slide out the controlled range of guide rail 61 of slide bar 62, avoids the impact because motion amplitude is excessive to detect.
In the utility model, described drive unit 3 and the matching relationship of telescoping mechanism are not limited only to above-mentioned the first embodiment, for example: the second embodiment simplified schematic diagram as shown in Figure 4, described drive unit 3 is cylinders, telescoping mechanism is gear & rack structure, the piston rod 31 of cylinder is fixedly connected with driving tooth bar 63, the gear 64 that drives tooth bar 63 and to be arranged on base 4 engages, on base 4, be also provided with a slide bar 62 slidably, one end of slide bar 62 is fixedly connected with transmission gear 65, the other end is connected with eddy current probe 5, gear 64 and driving rack 65 engage, in the time driving tooth bar 63 to move along with piston rod 31, driving rack 65 drives eddy current probe 5 to move by slide bar 62.Described drive unit 3 and telescoping mechanism can also be the cooperations of sliding nut and ball-screw 66, the third embodiment simplified schematic diagram as shown in Figure 5, drive unit 3 is motors, motor is arranged on installing plate 2 lower ends by base 4, and motor is connected with leading screw 66, and leading screw 66 is provided with sliding nut 68, sliding nut 68 is connected with eddy current probe 5 by a slide bar 62, in the time that driven by motor leading screw 66 rotates, sliding nut 68 moves along feed rod 67, and then drives eddy current probe 5 to move.
The embodiment of above drive unit 3 and telescoping mechanism is all to carry out routing motion by multiple mechanisms, this is mainly the stability that guarantees motion, and then the mobile accuracy of raising eddy current probe 5, guarantee the centering of eddy current probe 5 and guide cylinder 1 and through hole 21, make eddy current probe 5 more accurate in the time measuring, avoid because mobile unstable and impact detects.
This device is directly installed on fuel rod replacing device in use, unifies to control this device and fuel rod replacing device by remote computer.The lower end of described fuel rod replacing device is provided with web joint, web joint is provided with one with externally threaded connecting pipe and multiple connecting hole, this device is arranged on web joint, so described installing plate 2 upper ends of this device are provided with multiple support bars 8 perpendicular to installing plate 2, the two ends of described support bar 8 are equipped with external thread, the lower end of support bar 8 is threaded with installing plate 2, and the upper end of support bar 8 is furnished with set nut 81.And the upper end of described guide cylinder 1 is provided with internal thread.When mounted, first the each parts except support bar 8 are assembled into together, guide cylinder 1 and connecting pipe are threaded, then from the upper end of web joint, support bar 8 is penetrated into connecting hole and is finally threaded with installing plate 2, the set nut 81 of support bar 8 upper ends plays limited support effect on the one hand, plays on the other hand the effect that regulates whole device balance, for the ease of regulating and supporting, described support bar 8 is provided with four, and four support bars 8 are square setting in installing plate 2 upper ends.Meanwhile, the length of support bar 8 is greater than the length of guide cylinder 1
When use, first this device is arranged on the connecting pipe of fuel rod replacing device lower end by guide cylinder 1 Primary Location; Then support bar 8 is connected together through web joint and the installing plate 2 of fuel rod replacing device lower end, make whole device stable by set nut 81; After installing, fuel rod replacing device is moved to fuel rod 9 upper ends, guide cylinder 1 is enclosed within on fuel rod 9, fuel rod replacing device is provided with removal handle, by removal handle, fuel rod 9 is pulled down and mentioned, in this course of action, eddy current probe 5 is in retracted state, reason is the external diameter that the internal diameter of eddy current probe 5 is just slightly larger than fuel rod 9, can interfere the dismounting of fuel rod 9 if be directly inserted in eddy current probe 5; In the time that fuel rod 9 rises to eddy current probe 5 top, the piston rod 31 of control cylinder drives eddy current probe 5 to move to and guide cylinder 1 coaxial position, after eddy current probe 5 and the coaxial centering of guide cylinder 1, removal handle drives fuel rod 9 decline and pass eddy current probe 5, and now eddy current probe 5 can detect fuel rod 9; Having detected a rear removal handle of fuel rod 9 again mentions fuel rod 9 fuel rod 9 is exited from eddy current probe 5; fuel rod 9 exits exhaust hood control piston bar 31 and bounces back and then drive eddy current probe 5 to bounce back; retraction is not only other actions in order to prevent from interfering fuel rod, also eddy current probe 5 has been played to protective effect.If the fuel rod after detection has directly maintenance or replacing of problem, if no problem, be reinstalled onto original position, according to the method, other fuel rods are detected.
The utility model is not limited only to fuel rod EDDY CURRENT, and also, applicable to the detection of similarly thin long round parts, versatility is good.
In sum, a kind of fuel rod eddy current testing device of the utility model, moves reliable, easy to operate, has effectively solved in prior art existing problem in fuel rod EDDY CURRENT.So, have very high value and use meaning thereby the utility model has effectively overcome practical problemss more of the prior art.
Above-mentioned embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.The utility model also has many aspects under the prerequisite without prejudice to overall thought, to improve, and all can, under spirit of the present utility model and category, can above-described embodiment be modified or be changed for person skilled in the art scholar.Therefore, have in technical field under such as and conventionally know that the knowledgeable modifies or changes not departing from all equivalences that complete under spirit that the utility model discloses and technological thought, must be contained by claim of the present utility model.
Claims (7)
1. a fuel rod eddy current testing device, it is characterized in that: comprise guide cylinder (1), installing plate (2), drive unit (3), telescoping mechanism and eddy current probe (5), installing plate (2) is provided with a through hole (21), described guide cylinder (1) is arranged on installing plate (2) upper end coaxial with through hole (21), described drive unit (3) is arranged on the lower end of installing plate (2), drive unit (3) is connected with telescoping mechanism, the axis of the direction of motion of telescoping mechanism and guide cylinder (1) is vertical and on guide cylinder (1) extended line radially, the end of telescoping mechanism is connected with eddy current probe (5), under the drive of telescoping mechanism, eddy current probe (5) translation between a working position and an off-position, eddy current probe (5) is coaxial with guide cylinder (1) in the time of working position.
2. a kind of fuel rod eddy current testing device according to claim 1, it is characterized in that: described drive unit (3) is cylinder, described telescoping mechanism comprises the guide rail (61) and the slide bar (62) that match, the direction of motion of described cylinder piston rod (31) is consistent with the direction of motion of slide bar (62), described guide rail (61) is connected with installing plate (2) by a base (4), and guide rail (61) is parallel with installing plate (2), (31 are connected the piston rod of one end of described slide bar (62) by connecting link (7) and cylinder, the other end is connected with eddy current probe (5), one end of described connecting link (7) has the first elongated slot (71) vertically, the middle part of connecting link (7) has the second elongated slot (72) vertically, the piston rod (31) of described cylinder matches with first elongated slot (71) of connecting link (7) by the first sliding pin (711), described slide bar (62) matches with the second elongated slot (72) by the second sliding pin (721), the other end of connecting link (7) and guide rail (61) are hinged.
3. a kind of fuel rod eddy current testing device according to claim 2, is characterized in that: described connecting link (7) is provided with two.
4. a kind of fuel rod eddy current testing device according to claim 1, is characterized in that: described eddy current probe (5) is circular.
5. a kind of fuel rod eddy current testing device according to claim 1, it is characterized in that: the upper end of described installing plate (2) is provided with multiple support bars perpendicular to installing plate (2) (8), the two ends of described support bar (8) are equipped with external thread, the lower end of support bar (8) is threaded with installing plate (2), and the upper end of support bar (8) is furnished with set nut (81).
6. a kind of fuel rod eddy current testing device according to claim 5, is characterized in that: the length of described support bar (8) is greater than the length of guide cylinder (1).
7. a kind of fuel rod eddy current testing device according to claim 1, is characterized in that: the upper end of described guide cylinder (1) is provided with internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320704188.9U CN203617000U (en) | 2013-11-07 | 2013-11-07 | Eddy current testing device for fuel rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320704188.9U CN203617000U (en) | 2013-11-07 | 2013-11-07 | Eddy current testing device for fuel rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617000U true CN203617000U (en) | 2014-05-28 |
Family
ID=50769629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320704188.9U Withdrawn - After Issue CN203617000U (en) | 2013-11-07 | 2013-11-07 | Eddy current testing device for fuel rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617000U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559922A (en) * | 2013-11-07 | 2014-02-05 | 国核电站运行服务技术有限公司 | Eddy current detection device for fuel rod |
-
2013
- 2013-11-07 CN CN201320704188.9U patent/CN203617000U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559922A (en) * | 2013-11-07 | 2014-02-05 | 国核电站运行服务技术有限公司 | Eddy current detection device for fuel rod |
| CN103559922B (en) * | 2013-11-07 | 2016-02-17 | 国核电站运行服务技术有限公司 | A kind of eddy current detection device for fuel rod |
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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: 20140528 Effective date of abandoning: 20160217 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |