CN103943155A - Flaw detection device for inner hole of heat transfer pipe of nuclear-power evaporator - Google Patents
Flaw detection device for inner hole of heat transfer pipe of nuclear-power evaporator Download PDFInfo
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- CN103943155A CN103943155A CN201410196492.6A CN201410196492A CN103943155A CN 103943155 A CN103943155 A CN 103943155A CN 201410196492 A CN201410196492 A CN 201410196492A CN 103943155 A CN103943155 A CN 103943155A
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- holes
- concave station
- pedestal
- transfer pipe
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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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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to a flaw detection device for an inner hole of a heat transfer pipe of a nuclear-power evaporator. The device comprises a seat body and a probe mounted on the seat body, wherein a first concave table plane and a second concave table plane are formed on the side face of a cylinder of the seat body, four through holes are formed in the first concave table plane and the second concave table plane parallel to each other and include two through holes I and two through holes II, the two through holes I are used for mounting flaw-detection-point focusing probes, the two through holes II are used for mounting line focusing probes, and emitting ends of the probes are located at the second concave table plane; the axes of the two through holes II are intersected on one side of the first concave table plane and are intersected with the axis of the seat body, and the plane on which the axes of the two through holes I are located is vertical to the first concave table plane; the axes of the two through holes II are located on two sides of the axis of the seat body and are located in the same plane, and the plane on which the axes of the two through holes II are located is vertical to the first concave table plane. According to the device, the pipe wall can be simultaneously, axially and circumferentially detected, so that the problems that the detection is omitted, and cracks cannot be detected are avoided.
Description
Technical field
The present invention relates to a kind of nuclear power evaporator heat-transfer pipe endoporus failure detector.
Background technology
Nuclear power, as a kind of energy of efficient, clean and sustainable development, is subject to people's great attention and extensive concern again in recent years.According to Environmental Status and sustainable development needs, nuclear energy has become current China and has ensured the energy safety of supply, adjusts one of important substitute energy of the tool realistic meaning of electric structure, is the important component part that China's modern energy industry is built.
Steam generator is the hinge of pressurized-water reactor nuclear power plant one, secondary circuit, the key equipment of a circuit system, and Main Function is to produce high-quality dry steam by the heat exchange effect of tube bank, drives Turbo-generator Set generating by main steam line.Go agent to flow through reactor core with radioactivity because a loop is cold, therefore core vapour generator is also the part on a circuit pressure border, for preventing that radiomaterial from leaking.According to external report, in the unplanned shutdown number of times of PWR nuclear power plant, approximately have 1st/4th, cause because of relevant steam generator problem, therefore it is very important to the safe operation of nuclear power plant.Nuclear power evaporator is all selected U-shaped pipe with heat-transfer pipe, with inverted U-shaped formula dense arrangement, it plays dual parts isolation and conducts heat, what circulate at inside surface is a loop working-medium water higher with radioactive heat, in outside surface circulation is extraction must to be processedly be used for producing steam secondary circuit working-medium water from natural seawater or river warp, by it by the thermal energy conduction of a Loop Water to secondary circuit water and make it become steam, its reliability directly has influence on security and the economy of nuclear power plant.Therefore seem particularly important for heat-transfer pipe carrying out flaw detection, only have 12mm but heat-transfer pipe diameter of bore is less, therefore more difficult to its carrying out flaw detection, and if occur omitting, slight crack survey less than, in nuclear power evaporator use procedure, can produce major accident.
Summary of the invention
The technical problem to be solved in the present invention is: overcome heat-transfer pipe flaw detection in prior art and occur omission, the undetectable deficiency of slight crack, a kind of nuclear power evaporator heat-transfer pipe endoporus failure detector is provided.
The present invention is specific as follows for solving the problems of the technologies described above adopted technical scheme: a kind of nuclear power evaporator heat-transfer pipe endoporus failure detector, comprises pedestal and be arranged on the probe on pedestal; Described probe comprises two flaw detection point focusing probe and two line focus probes; Described pedestal is the right cylinder that a diameter is less than 12mm, wherein on right cylinder side, have the first concave station face and the second concave station face, the first described concave station face is parallel with the second concave station face, formation two ends are right cylinder, centre has the structure of two parallel concave station faces, on two described parallel concave station faces, offer four through holes, be respectively two for one and two through holes two of popping one's head in for described line focus is installed of through hole of described flaw detection point focusing probe are installed, described probe transmitting terminal is positioned on the second concave station face;
The axes intersect of two wherein said through holes one is in the first concave station face one side, and the axis of two through holes one all with pedestal axes intersect, the plane at two through hole one axis places is vertical with the first concave station face;
The axis of two described through holes two is positioned at the both sides of pedestal axis, and the axis of two through holes two is in same plane, and the axis place plane of two through holes two is vertical with the first concave station face.
When nuclear power evaporator heat-transfer pipe endoporus failure detector flaw detection of the present invention, be positioned at heat-transfer pipe inside, the flaw detection point focusing probe of utilizing two relative tilts to arrange, its wave beam focuses on and approaches pipe outer wall place, detect heat transfer tube wall circumferential defect, avoid like this due to the wave beam problem that can't detect parallel with slight crack, avoided flaw detection point focusing probe can not detect circumferential slight crack in heat-transfer pipe tube wall, and the line focus that two misalignment pedestal axis are set is popped one's head in, the wave beam that line focus is popped one's head in send and the axial slight crack of tube wall are at an angle, thereby detect heat-transfer pipe axial flaw, tube wall is axial like this, circumferentially can both detect simultaneously, stop to occur omitting, the undetectable problem of slight crack, accuracy rate and the work efficiency of flaw detection are improved, make flaw detection more reliable.
Further, for making pedestal rotate smoothly in heat-transfer pipe and to move ahead, described pedestal one end is connected with the tractor that traction pedestal rotates and moves ahead in heat-transfer pipe.
As preferably, described pedestal two terminal circle column diameter is 11.5mm, and wherein the first concave station face cup depth is 2mm, and the second concave station face cup depth is 4.5mm.Flaw detection point focusing probe and line focus probe and heat-transfer pipe non-direct contact, have certain thickness moisture film between probe and heat-transfer pipe inwall, can effectively control water film thickness through controlling table top cup depth, improves probe flaw detection stability, accuracy.
Further, the axis of two described through holes one and pedestal axis angle α are 70 °, and in make to detect a flaw point focusing probe and heat-transfer pipe tube wall, circumferential slight crack has a certain degree, and makes flaw detection more accurate.
The invention has the beneficial effects as follows, when nuclear power evaporator heat-transfer pipe endoporus failure detector flaw detection of the present invention, be positioned at heat-transfer pipe inside, utilize the flaw detection point focusing probe of two relative tilt settings to detect heat transfer tube wall circumferential defect, avoid like this due to the wave beam problem that can't detect parallel with slight crack, avoided flaw detection point focusing probe can not detect circumferential slight crack in heat-transfer pipe tube wall, and the line focus probe that two misalignment pedestal axis are set detects heat-transfer pipe axial flaw, tube wall is axial like this, circumferentially can both detect simultaneously, stop to occur omitting, the undetectable problem of slight crack, accuracy rate and the work efficiency of flaw detection are improved, make flaw detection more reliable.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is nuclear power evaporator heat-transfer pipe endoporus failure detector front view of the present invention;
Fig. 2 is nuclear power evaporator heat-transfer pipe endoporus failure detector vertical view of the present invention;
Fig. 3 is failure detector of the present invention schematic diagram in nuclear power evaporator heat-transfer pipe;
In figure: 1. pedestal, 2. through hole one, 3. through hole two, 4. the first concave station face, 5. the second concave station face, 6. flaw detection point focusing probe, 7. line focus probe, 8. heat-transfer pipe, 9. water.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Embodiment 1
As illustrated in fig. 1 and 2, a kind of nuclear power evaporator heat-transfer pipe endoporus failure detector, is characterized in that: comprise pedestal 1 and be arranged on the probe on pedestal 1; Described probe comprises two flaw detection point focusing probe 6 and two line focus probes 7; Described pedestal 1 is the right cylinder that a diameter is less than 12mm, wherein on right cylinder side, have the first concave station face 4 and the second concave station face 5, the first described concave station face 4 is parallel with the second concave station face 5, formation two ends are right cylinder, centre has the structure of two parallel concave station faces, on two described parallel concave station faces, offer four through holes, be respectively two for the through hole 1 of described flaw detection point focusing probe 6 and two being installed for the through hole 23 of described line focus probe 7 is installed, described probe transmitting terminal is positioned on the second concave station face 5;
The axes intersect of two wherein said through holes 1 is in the first concave station face 4 one sides, and the axis of two through holes 1 all with pedestal 1 axes intersect, the plane at two through hole one 2 axis places is vertical with the first concave station face 4;
The axis of two described through holes 23 is positioned at the both sides of pedestal 1 axis, and the axis of two through holes 23 is in same plane, and the axis place plane of two through holes 23 is vertical with the first concave station face 4.
As shown in Figure 3, when nuclear power evaporator heat-transfer pipe endoporus failure detector flaw detection of the present invention, be positioned at heat-transfer pipe 8 inside, the flaw detection point focusing probe 6 of utilizing two relative tilts to arrange, its wave beam focuses on and approaches pipe outer wall place, detect heat-transfer pipe 8 wall circumferential defects, avoid like this due to the wave beam problem that can't detect parallel with slight crack, avoided flaw detection point focusing probe 6 can not detect circumferential slight crack in heat-transfer pipe 8 tube walls, and the line focus that two misalignment pedestal axis are set pops one's head in 7, make line focus probe 7 wave beams that send and the axial slight crack of tube wall at an angle, thereby detect heat-transfer pipe 8 axial flaws, tube wall is axial like this, circumferentially can both detect simultaneously, stop to occur omitting, the undetectable problem of slight crack, accuracy rate and the work efficiency of flaw detection are improved, make flaw detection more reliable.
Further, for making pedestal rotate smoothly in heat-transfer pipe and to move ahead, described pedestal 1 one end is connected with traction pedestal 1 at the interior rotation of heat-transfer pipe 8 and the tractor that moves ahead.
Once enter, described pedestal 1 two terminal circle column diameter is 11.5mm, and wherein the first concave station face 4 cup depth d are 2mm, and the second concave station face 5 cup depth d1 are 4.5mm.Flaw detection point focusing probe 6 and line focus probe 7 and heat-transfer pipe 8 non-direct contacts, have certain thickness water 9 films between probe and heat-transfer pipe 8 inwalls, can effectively control water 9 film thicknesses through controlling table top cup depth, improves probe flaw detection stability, accuracy
Further, the axis of two described through holes 1 and pedestal 1 axis angle α are 70 °, and the point focusing probe 6 that makes to detect a flaw has a certain degree with the interior circumferential slight crack of heat-transfer pipe 8 tube walls, makes flaw detection more accurate.
Claims (4)
1. a nuclear power evaporator heat-transfer pipe endoporus failure detector, is characterized in that: comprise pedestal (1) and be arranged on the probe on pedestal (1), described probe comprises two flaw detection point focusing probe (6) and two line focus probes (7), described pedestal (1) is the right cylinder that a diameter is less than 12mm, wherein on right cylinder side, have the first concave station face (4) and the second concave station face (5), the first described concave station face (4) is parallel with the second concave station face (5), formation two ends are right cylinder, centre has the structure of two parallel concave station faces, on two described parallel concave station faces, offer four through holes, be respectively two for the through hole one (2) of described flaw detection point focusing probe (6) and two being installed for the through hole two (3) of described line focus probe (7) is installed, described probe transmitting terminal is positioned on the second concave station face (5),
The axes intersect of wherein said two through holes one (2) is in the first concave station face (4) one sides, and the axis of two through holes one (2) all with pedestal (1) axes intersect, the plane at two through hole one (2) axis places is vertical with the first concave station face (4);
The axis of described two through holes two (3) is positioned at the both sides of pedestal (1) axis, and the axis of two through holes two (3) is in same plane, and the axis place plane of two through holes two (3) is vertical with the first concave station face (4).
2. nuclear power evaporator heat-transfer pipe endoporus failure detector according to claim 1, is characterized in that: described pedestal (1) one end is connected with the tractor that traction pedestal (1) rotates and moves ahead in heat-transfer pipe (8).
3. nuclear power evaporator heat-transfer pipe endoporus failure detector according to claim 1, it is characterized in that: described pedestal (1) two terminal circle column diameter is 11.5mm, wherein the first concave station face (4) cup depth is 2mm, and the second concave station face (5) cup depth is 4.5mm.
4. nuclear power evaporator heat-transfer pipe endoporus failure detector according to claim 1, is characterized in that: the axis of described two through holes one (2) and pedestal (1) axis angle are all 70 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410196492.6A CN103943155B (en) | 2014-05-09 | 2014-05-09 | Flaw detection device for inner hole of heat transfer pipe of nuclear-power evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410196492.6A CN103943155B (en) | 2014-05-09 | 2014-05-09 | Flaw detection device for inner hole of heat transfer pipe of nuclear-power evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103943155A true CN103943155A (en) | 2014-07-23 |
| CN103943155B CN103943155B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410196492.6A Active CN103943155B (en) | 2014-05-09 | 2014-05-09 | Flaw detection device for inner hole of heat transfer pipe of nuclear-power evaporator |
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Citations (6)
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|---|---|---|---|---|
| JPH0763880A (en) * | 1993-08-25 | 1995-03-10 | Ishikawajima Harima Heavy Ind Co Ltd | Method for detecting defect in weld between lower mirror plate and stub tube of reactor pressure vessel and liquid medium filling device used in the method |
| FR2715472A1 (en) * | 1994-01-21 | 1995-07-28 | Westinghouse Electric Corp | Appts. to determine position of inspection probe rotating in tube |
| CN201936625U (en) * | 2010-12-14 | 2011-08-17 | 核动力运行研究所 | Ultrasonic examination probe composite structure inside pipe fitting |
| CN102422155A (en) * | 2009-05-14 | 2012-04-18 | 西屋电气有限责任公司 | wireless pipe inspection system |
| CN202487186U (en) * | 2011-12-28 | 2012-10-10 | 核动力运行研究所 | Ultrasonic testing tool for welding line of safety injection pipe of pressure vessel in nuclear power station |
| CN204045222U (en) * | 2014-05-09 | 2014-12-24 | 常州市常超电子研究所有限公司 | Nuclear power evaporator heat-transfer pipe endoporus failure detector |
-
2014
- 2014-05-09 CN CN201410196492.6A patent/CN103943155B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0763880A (en) * | 1993-08-25 | 1995-03-10 | Ishikawajima Harima Heavy Ind Co Ltd | Method for detecting defect in weld between lower mirror plate and stub tube of reactor pressure vessel and liquid medium filling device used in the method |
| FR2715472A1 (en) * | 1994-01-21 | 1995-07-28 | Westinghouse Electric Corp | Appts. to determine position of inspection probe rotating in tube |
| CN102422155A (en) * | 2009-05-14 | 2012-04-18 | 西屋电气有限责任公司 | wireless pipe inspection system |
| CN201936625U (en) * | 2010-12-14 | 2011-08-17 | 核动力运行研究所 | Ultrasonic examination probe composite structure inside pipe fitting |
| CN202487186U (en) * | 2011-12-28 | 2012-10-10 | 核动力运行研究所 | Ultrasonic testing tool for welding line of safety injection pipe of pressure vessel in nuclear power station |
| CN204045222U (en) * | 2014-05-09 | 2014-12-24 | 常州市常超电子研究所有限公司 | Nuclear power evaporator heat-transfer pipe endoporus failure detector |
Non-Patent Citations (2)
| Title |
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| 何方成: "两种薄壁管材超声波检测方法的对比研究", 《北京机械工程学会论文》 * |
| 高德彪: "核电水冷转子不锈钢管根部钎焊接头超声波探伤", 《无损检测》 * |
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| CN103943155B (en) | 2017-02-15 |
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Inventor after: Wang Zhengqing Inventor after: Zhou Nanqi Inventor before: Zhou Nanqi |
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