CN103021484A - Secure pipe automatic centering mechanism for nuclear power station - Google Patents
Secure pipe automatic centering mechanism for nuclear power station Download PDFInfo
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- CN103021484A CN103021484A CN2012103813495A CN201210381349A CN103021484A CN 103021484 A CN103021484 A CN 103021484A CN 2012103813495 A CN2012103813495 A CN 2012103813495A CN 201210381349 A CN201210381349 A CN 201210381349A CN 103021484 A CN103021484 A CN 103021484A
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- 238000001514 detection method Methods 0.000 claims abstract description 28
- 244000273618 Sphenoclea zeylanica Species 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 230000000712 assembly Effects 0.000 abstract 3
- 238000000429 assembly Methods 0.000 abstract 3
- 230000005855 radiation Effects 0.000 abstract 1
- 238000009659 non-destructive testing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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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Abstract
The invention discloses a secure pipe automatic centering mechanism for a nuclear power station. The automatic centering mechanism comprises a plurality of groups of support assemblies distributed around a center rod at an interval, a traction member fixed on a sliding base at one end, and a pull-traction member, wherein the plurality of groups of support assemblies can be opened synchronously, rollers on the tail end of the plurality of groups of support assemblies butt against the inner wall of a pipe to be detected at the same time, so that the automatic centering mechanism can be fixed in the pipe reliably; and detection instrument carried on the center rod can carry out detection operation. After completing the operation, the centering mechanism is in a tension state, that is to say, the rollers butt against the inner wall of the pipe tightly, if a detection apparatus using the centering mechanism breaks down, such as traction mechanism failure of the traction member, resulting in that the centering mechanism cannot be withdrawn from the detected pipe or from a manhole. To solve the above problem, the traction member can be cut off to release the traction member, the support assembles can be folded rapidly by means of the elastic restoring force of an elastic member, and the rollers are separated from the inner wall of the pipe, so that the centering mechanism or the detection apparatus can be withdrawn rapidly and securely, thereby obviating unnecessary personnel radiation.
Description
Technical field
The present invention relates to a kind of nuclear power station safety holotype pipeline self-centering unit.
Background technology
The PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION system mainly comprises the equipment such as reactor pressure vessel, steam generator, voltage stabilizer, main pump, mainly links to each other by pipeline welding between them.Primary heat transport system is as the core of whole nuclear power station, for guaranteeing its safe operation, each important weld seam and other position have been proposed the Compulsory Feature of Non-Destructive Testing, and specified and before putting into operation and after moving the certain hour interval, to implement the front and regular inservice inspection of labour to it respectively.
For the girth joint between these pipelines is carried out Non-Destructive Testing internally, on the nuclear power station major equipment, on steam generator, voltage stabilizer, all be designed with in advance manhole, but relative these pipelines of people's bore dia are all less.Non-destructive detecting device must enter from manhole, accurately locates on tested pipeline, and can carry detection instrument and carry out operation, can withdraw from safely from manhole after operation is finished.In addition, inner the reaching on every side of main equipment has higher radioactivity in the certain limit during owing to inservice inspection, in case equipment failure must be able to fast and safely be withdrawn from from manhole, avoids unnecessary personnel's irradiation.
Summary of the invention
The purpose of this invention is to provide a kind of nuclear power station safety holotype pipeline self-centering unit, this centering machine can accurately be located in tested pipeline center, and can carry detection instrument and detect operation, after finishing, operation can withdraw from safely, avoid unnecessary personnel's irradiation.
For achieving the above object, the present invention has adopted following technical scheme: a kind of nuclear power station safety holotype pipeline self-centering unit comprises
Can carry the center-pole of detection instrument;
Be distributed in described center-pole many groups supporting component all around, every group of described supporting component includes the first support bar and the second support bar that rotates and connect;
Be fixedly installed on the holder on the described center-pole;
Can be slidingly arranged in along the longitudinal direction of described center-pole the sliding seat on this center-pole, the first support bar of described every group of supporting component be connected an end of support bar and rotate and be connected with described holder, described sliding seat respectively, have at least in the first support bar of described every group of supporting component and the second support bar on the other end of a support bar and be provided with the roller that can be pushed against on the tested inner-walls of duct, all described rotational axis lines that are rotationally connected all parallel in described every group of supporting component, and extend along the horizontal direction of described center-pole;
One end is fixedly installed on the described center-pole and the other end is fixedly installed on the elastic component that is used for providing this sliding seat elastic-restoring force on the described sliding seat;
One end is fixed on the traction piece on the described sliding seat, when the described traction piece of tractive, described sliding seat overcomes the elastic-restoring force of described elastic component to be drawn close to described holder, the first support bar and second support bar of the described supporting component of many groups open synchronously, and the roller of these many group supporting components all is pushed against on the inwall of tested pipeline simultaneously; When unclamping described traction piece, described sliding seat is away from described holder under the elastic-restoring force effect of described elastic component, the first support bar of the described supporting component of many groups and the second support bar draw in synchronously around described center-pole, and the roller of these many group supporting components all breaks away from the inwall of tested pipeline simultaneously.
During implementation, described holder is more terminal than the detection of the more close described center-pole of described sliding seat, on the described holder angle sheave is housed, the wheel axial line of this angle sheave extends along the horizontal direction of described center-pole, described traction piece is from an end that is fixed on described sliding seat, longitudinal direction along described center-pole detects terminal the extension towards it, after walking around the angle sheave of described holder, along vertically extending towards detecting terminal direction away from it of described center-pole.
Further, described holder comprises the first fixed block and the second fixed block that all is fixedly installed on the described center-pole, described the first fixed block rotates with an end of the first support bar of described every group of supporting component and is connected, and described angle sheave is contained on described the second fixed block.
A kind of concrete embodiment, described supporting component have three groups, three groups of described supporting components evenly be distributed in described center-pole around, described traction piece be also to should there being three, three described traction pieces also evenly be distributed in described center-pole around.
A kind of concrete embodiment, the first support bar of described every group of supporting component and the second support bar all intersect and are rotationally connected, and are provided with the roller that can be pushed against on the tested inner-walls of duct on the first support bar of described every group of supporting component and the end of the second support bar.
A kind of concrete embodiment, an end of described elastic component is fixedly installed on the described center-pole by the elastic component support.
A kind of concrete embodiment is fixed with guiding trestle on the described center-pole, offers the guiding perforation on this guiding trestle, and described traction piece is passed in the described guiding perforation.
During implementation, described detection instrument is fixed on the outside of the detection end of described center-pole, and perhaps described center-pole adopts hollow stem, and described detection instrument can reach by the inner chamber of described hollow stem the detection end of this hollow stem.
Because the utilization of technique scheme, the present invention compared with prior art has following advantages: in this self-centering unit, when many group supporting components draw in mutually, because radial dimension diminishes, can enter tested pipeline from manhole smoothly, in arriving pipeline behind the precalculated position, the tractive traction piece, many groups supporting component in the centering machine opens synchronously, the roller of many group supporting component ends pushes against inner-walls of duct simultaneously, whole self-centering unit reliably was fixed on pipeline and suffered this moment, center-pole is in pipeline center's (self-centering), then can detect operation by the detection instrument that carries on the center-pole, after the detection operation is finished, unclamp traction piece, many groups supporting component of centering machine draws in together, the roller of many group supporting component ends is away from inner-walls of duct, and radial dimension diminishes, and then self-centering unit can be smoothly from the manhole safe escape.In particular, break down at the checkout equipment that uses this centering machine, haulage gear such as traction piece lost efficacy, and centering machine is in tensioning state, be that roller is pushed against inner-walls of duct, this moment is in the time of can't withdrawing from centering machine from tested pipeline or manhole, can cut off traction piece, be equivalent to loosen traction piece this moment, under the elastic-restoring force effect of elastic component, organize supporting component more and can draw in rapidly, realized fast and safely withdrawing from of centering machine or checkout equipment, avoid the situation that roller can't be withdrawn even at the cost of one's life occurring on inner-walls of duct, avoided unnecessary personnel's irradiation.
Description of drawings
Accompanying drawing 1 is schematic diagram one of the present invention, and wherein three groups of supporting components open synchronously;
Accompanying drawing 2 is schematic diagram two of the present invention, and wherein three groups of supporting components draw in synchronously;
Accompanying drawing 3 is positioned at the schematic diagram of tested pipeline center for self-centering unit of the present invention.
Embodiment
Further set forth the present invention below in conjunction with accompanying drawing.
Referring to Fig. 1-3, a kind of nuclear power station safety holotype pipeline self-centering unit, comprise center-pole 1, three groups of supporting components 21, holder 22, sliding seat 7, elastic component 5, traction piece 2, three groups of supporting components 21 evenly be distributed in center-pole 1 around, center-pole 1 is hollow, like this after center-pole 1 accurately is positioned at the center of tested pipeline 20, detection instrument can stretch out the detection end 23 of this center-pole 1 from the outside by the inner chamber of center-pole 1, enter tested pipeline 20 and carry out the Non-Destructive Testing operation.In other embodiment, center-pole also can be solid, and detection instrument need to be fixed on the outside of the detection end of center-pole in advance like this, and after then center-pole accurately was positioned at the center of tested pipeline, detection instrument can carry out Non-Destructive Testing to pipeline equally.
Every group of supporting component 21 includes the first support bar 13 and the second support bar 15 that intersects and be rotationally connected by rotation axis 14 in three groups of supporting components 21, and namely every group of supporting component 21 all consists of the cross that can open or draw in.Holder 22 fixed covers are located on the center-pole 1, sliding seat 7 can be set in along the longitudinal direction of center-pole 1 on the center-pole 1 slidably, the first support bar 13 of every group of supporting component 21 and an end of the second support bar 15 respectively with holder 22, sliding seat 7 connection that rotates, in Fig. 1, rotation axis is labeled as respectively 19,8, be provided with the roller 16 that can be pushed against on tested pipeline 20 inwalls on the first support bar 13 of every group of supporting component 21 and the other end of the second support bar 15, corresponding rotation axis 19 in every group of supporting component 21,8,14 axial line all parallels, and the horizontal direction along center-pole 1 extends, like this when sliding seat 7 when center-pole 1 slides, the first support bar 13 and second support bar 15 of three groups of supporting components 21 can be opened or draw in synchronously, when opening, the roller 16 of the first support bar 13 and the second support bar 15 ends can be pushed against on the inwall of pipeline 20 simultaneously, as shown in Figure 3, realize the self-centering installation of center-pole 1, namely this moment, center-pole 1 was stably fixed at the center of tested pipeline 20, then can detect operation by detection instrument.In other embodiment, also can be arranged in the first support bar of every group of supporting component or the end dress roller of the second support bar (support bar), the self-centering location that also can realize like this center-pole by the slip of sliding seat.
In Fig. 1-2, an end of elastic component 5 is fixedly installed on the center-pole 1 by elastic component support 4, and the other end of elastic component 5 is fixedly installed on the sliding seat 7 by fixed block 6, and elastic component 5 is used for providing sliding seat 7 elastic-restoring forces.One end of traction piece 2 is fixed on the sliding seat 7 by fixed block 9, traction piece 2 can adopt flexible strand, when tractive traction piece 2, sliding seat 7 overcomes the elastic-restoring force of elastic component 5 to be drawn close to holder 22, the first support bar 13 and second support bar 15 of three groups of supporting components 21 open synchronously, the roller 16 of three groups of supporting components 21 all is pushed against on the inwall of pipeline 20 simultaneously, as shown in Figure 3, whole self-centering unit reliably was fixed on pipeline 20 and suffered this moment, center-pole 1 is in pipeline center, and this self-centering unit can self-centering in the pipeline of different-diameter; When unclamping traction piece 2, at the elastic-restoring force effect lower slider seat 7 of elastic component 5 away from holder 22, the first support bar 13 of three groups of supporting components 21 and the second support bar 15 draw in around center-pole 1 synchronously, the roller 16 of three groups of supporting components 21 all breaks away from the inwall of pipeline 20 simultaneously, and can withdraw from whole self-centering unit this moment.Break down at the checkout equipment that uses this centering machine, haulage gear such as traction piece lost efficacy, and centering machine is in tensioning state, be that roller is pushed against inner-walls of duct, this moment is in the time of can't withdrawing from centering machine from tested pipeline or manhole, can cut off traction piece, be equivalent to loosen traction piece 2 this moment, under the elastic-restoring force effect of elastic component 5, supporting component 21 can draw in rapidly, roller 16 breaks away from pipeline 20 inwalls, has realized fast and safely withdrawing from of centering machine or checkout equipment, has avoided unnecessary personnel's irradiation.
In Fig. 1-2, to three groups of supporting components 21 should be arranged, traction piece 2 be also to should there being three, three traction pieces 2 also evenly be distributed in center-pole 1 around, be used for driving synchronously opening of three groups of supporting components 21 or drawing in by sliding seat 7.In Fig. 1-2, holder 22 is than the detection end 23 of sliding seat 7 more close center-poles 1, so need to angle sheave 12 be housed at holder 22, the center line of the wheel shaft 11 of this angle sheave 12 extends along the horizontal direction of center-pole 1, angle sheave 12 corresponding traction pieces 2 also have three, every traction piece 2 is from an end that is fixed on sliding seat 7, longitudinal direction along center-pole 1 detects terminal 23 extensions towards it, behind the angle sheave 12 of walking around a holder 22, along vertically extending towards detecting terminal direction away from it of center-pole 1, behind three traction pieces 2 of tractive, realize opening synchronously of three groups of supporting components 21 like this.
In order to guide the movement of traction piece 2, fixed cover is provided with guiding trestle 3 on the center-pole 1, offers three guiding perforation on this guiding trestle 3, and a traction piece 2 is passed in the guiding perforation.Elastic component 5 adopts spring, is placed with successively holder 22, sliding seat 7, elastic component 5, guiding trestle 3 on the longitudinal direction of center-pole 1.
In Fig. 1-2, centering machine is when normal operation, from the B direction to traction piece 2 application of forces by guiding trestle 3, because traction piece 2 is walked around angle sheave 12 and is linked to each other with sliding seat 7 by fixed block 9, therefore sliding seat 7 will move to the A direction, and the elastic component 5 that drives on the elastic component support 4 extends, energy accumulation, and the second support bar 15 passes through rotation axis 8 to the B direction rotation, the first support bar 13 passes through rotation axis 19 to the A direction rotation, equally distributed three groups of supporting components 21 open synchronously around center-pole 1 thereby make, and the most whole centering machine reliably is fixed on the center of pipeline to be checked.Centering machine is finished the work, in the time of need to withdrawing from tested pipeline 20, loosen traction piece 2 by guiding trestle 3 to the A direction, then sliding seat 7 will move to the B direction under the pulling of the elastic component 5 that extends, to the A direction rotation, the first support bar 13 passes through rotation axis 19 to the B direction rotation to the second support bar 15, thereby makes equally distributed three groups of supporting component 21 synchronous around center-pole 1 by rotation axis 8, finally draw at the center of pipeline 20 to be checked, be convenient to withdraw.
In the present embodiment, holder 22 comprises the first fixed block 18 and the second fixed block 10 that all is fixedly installed on the center-pole 1, the first fixed block 18 rotates with an end of the first support bar 13 of every group of supporting component 21 and is connected, and angle sheave 12 is contained on the second fixed block 10.In other embodiment, holder does not adopt two minutes body components, is feasible and adopt the parts that are wholely set yet.
Sum up, when supporting component 21 is in rounding state in the centering machine, because radial dimension diminishes, can enter tested pipeline 20 from manhole smoothly; After arriving the precalculated position, to traction piece 2 application of forces, the supporting component 21 of centering machine begins to open from the B direction, and the roller 16 of supporting component 21 ends is close to inner-walls of duct, finishes the self-centering to checkout equipment; After Detection task is finished, loosen traction piece 2 to the A direction, the supporting component 21 of centering machine begins to shrink, and the roller 16 of supporting component 21 ends is away from inner-walls of duct, and radial dimension diminishes, can be smoothly from the manhole safe escape.Break down at the checkout equipment that uses this centering machine, haulage gear such as traction piece lost efficacy, and centering machine is in tensioning state, be that roller is pushed against inner-walls of duct, this moment is in the time of can't withdrawing from centering machine from tested pipeline or manhole, can cut off traction piece, be equivalent to loosen traction piece this moment, under the elastic-restoring force effect of elastic component, supporting component can draw in rapidly, roller breaks away from inner-walls of duct, has realized fast and safely withdrawing from of centering machine or checkout equipment, has avoided unnecessary personnel's irradiation.The self-centering unit of this patent is pure mechanical mechanism, need not external electric power source, can realize accurate self-centering, promptly or under the malfunction can withdraw safely and fast, has avoided unnecessary personnel's irradiation, and simple in structure, reliability is high, is easy to safeguard.
Claims (8)
1. a nuclear power station safety holotype pipeline self-centering unit is characterized in that: comprise
Can carry the center-pole of detection instrument;
Be distributed in described center-pole many groups supporting component all around, every group of described supporting component includes the first support bar and the second support bar that rotates and connect;
Be fixedly installed on the holder on the described center-pole;
Can be slidingly arranged in along the longitudinal direction of described center-pole the sliding seat on this center-pole, the first support bar of described every group of supporting component be connected an end of support bar and rotate and be connected with described holder, described sliding seat respectively, have at least in the first support bar of described every group of supporting component and the second support bar on the other end of a support bar and be provided with the roller that can be pushed against on the tested inner-walls of duct, all described rotational axis lines that are rotationally connected all parallel in described every group of supporting component, and extend along the horizontal direction of described center-pole;
One end is fixedly installed on the described center-pole and the other end is fixedly installed on the elastic component that is used for providing this sliding seat elastic-restoring force on the described sliding seat;
One end is fixed on the traction piece on the described sliding seat, when the described traction piece of tractive, described sliding seat overcomes the elastic-restoring force of described elastic component to be drawn close to described holder, the first support bar and second support bar of the described supporting component of many groups open synchronously, and the roller of these many group supporting components all is pushed against on the inwall of tested pipeline simultaneously; When unclamping described traction piece, described sliding seat is away from described holder under the elastic-restoring force effect of described elastic component, the first support bar of the described supporting component of many groups and the second support bars draw in synchronously around described center-pole, and the roller of these many group supporting components is all simultaneously away from the inwall of tested pipeline.
2. a kind of nuclear power station safety holotype pipeline self-centering unit according to claim 1, it is characterized in that: described holder is more terminal than the detection of the more close described center-pole of described sliding seat, on the described holder angle sheave is housed, the wheel axial line of this angle sheave extends along the horizontal direction of described center-pole, described traction piece is from an end that is fixed on described sliding seat, longitudinal direction along described center-pole detects terminal the extension towards it, after walking around the angle sheave of described holder, along vertically extending towards detecting terminal direction away from it of described center-pole.
3. a kind of nuclear power station safety holotype pipeline self-centering unit according to claim 2, it is characterized in that: described holder comprises the first fixed block and the second fixed block that all is fixedly installed on the described center-pole, described the first fixed block rotates with an end of the first support bar of described every group of supporting component and is connected, and described angle sheave is contained on described the second fixed block.
4. a kind of nuclear power station safety holotype pipeline self-centering unit according to claim 1, it is characterized in that: described supporting component has three groups, three groups of described supporting components evenly be distributed in described center-pole around, described traction piece be also to should there being three, three described traction pieces also evenly be distributed in described center-pole around.
5. a kind of nuclear power station safety holotype pipeline self-centering unit according to claim 1, it is characterized in that: the first support bar of described every group of supporting component and the second support bar all intersect and are rotationally connected, and are provided with the roller that can be pushed against on the tested inner-walls of duct on the first support bar of described every group of supporting component and the end of the second support bar.
6. a kind of nuclear power station safety holotype pipeline self-centering unit according to claim 1, it is characterized in that: an end of described elastic component is fixedly installed on the described center-pole by the elastic component support.
7. a kind of nuclear power station safety holotype pipeline self-centering unit according to claim 1 is characterized in that: be fixed with guiding trestle on the described center-pole, offer the guiding perforation on this guiding trestle, described traction piece is passed in the described guiding perforation.
8. a kind of nuclear power station safety holotype pipeline self-centering unit according to claim 1, it is characterized in that: described detection instrument is fixed on the outside of the detection end of described center-pole, perhaps described center-pole adopts hollow stem, and described detection instrument can reach by the inner chamber of described hollow stem the detection end of this hollow stem.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210381349.5A CN103021484B (en) | 2012-10-10 | 2012-10-10 | A kind of nuclear power station safety holotype pipeline self-centering unit |
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| CN201210381349.5A CN103021484B (en) | 2012-10-10 | 2012-10-10 | A kind of nuclear power station safety holotype pipeline self-centering unit |
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| CN103021484B CN103021484B (en) | 2016-04-20 |
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Cited By (5)
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| CN103578587A (en) * | 2013-10-30 | 2014-02-12 | 核动力运行研究所 | Ultrasonic testing device for circumferential weld of cylinder of nuclear reactor pressure vessel |
| CN104183289A (en) * | 2013-05-24 | 2014-12-03 | 核动力运行研究所 | Testing device for welded joints of steam generator adapter tube |
| CN113210652A (en) * | 2021-05-17 | 2021-08-06 | 常州机电职业技术学院 | Handheld fine boring device |
| CN113732615A (en) * | 2021-09-16 | 2021-12-03 | 国家石油天然气管网集团有限公司 | Oil and gas pipeline welding slag protection device and method |
| CN116460942A (en) * | 2023-04-28 | 2023-07-21 | 蓝山县鑫旺竹业有限公司 | Centering mechanism for bamboo breaking device |
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Address after: Futian District, Shenzhen City Road 518000 Guangdong Province Science & Technology Building 1001, 1506 Applicant after: CGNPC Inspection Technology Co., Ltd. Applicant after: China General Nuclear Power Corporation Address before: Futian District, Shenzhen City Road 518000 Guangdong Province Science & Technology Building 1001, 1506 Applicant before: CGNPC Inspection Technology Co., Ltd. Applicant before: China Guangdong Nuclear Power Group Co., Ltd. |
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