CN104110431B - PWR nuclear power plant steam generator spacing screw rod anti-loose structure - Google Patents
PWR nuclear power plant steam generator spacing screw rod anti-loose structure Download PDFInfo
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- CN104110431B CN104110431B CN201310139235.4A CN201310139235A CN104110431B CN 104110431 B CN104110431 B CN 104110431B CN 201310139235 A CN201310139235 A CN 201310139235A CN 104110431 B CN104110431 B CN 104110431B
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- screw rod
- spacing screw
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- slotted chip
- chip breaker
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Abstract
The invention belongs to steam generator designing technique, specifically disclose a kind of PWR nuclear power plant steam generator spacing screw rod anti-loose structure. It comprises pipe location-plate and more piece spacing screw rod, on spacing screw rod, is processed with deep-slotted chip breaker, is processed with rectangle counterbore on pipe location-plate, in rectangle counterbore, is provided with lock washer, and lower spacing screw rod is fixedly connected with upper spacing screw rod by screw thread. Owing to being processed with deep-slotted chip breaker on spacing screw rod, when spacing screw rod and pipe support plate are installed, the lock washer of employing can be pressed in deep-slotted chip breaker, thereby spacing screw rod can not become flexible in pipe support plate, prevents from getting loose. On the spacing screw rod of the top, its outside of mounting end nut is provided with deep-slotted chip breaker and serrate slot, not only can prevent that the spacing screw rod of the top from getting loose, and simultaneously owing to being processed with serrate slot, is also convenient to tightening of end nut.
Description
Technical field
The invention belongs to steam generator designing technique, be specifically related to a kind of anti-untwisting about steam generatorStructure.
Background technology
The typical vertical natural recirculating type steam generator of pressurized-water reactor nuclear power plant is being furnished with along restraining on straight lengthSome blocks of pipe support plates.
Common, 1 of two blocks of pipe support plate, spacing screw rod 2 is set and provides supporting to pipe support plate 1Fixing, bottom 1 of a pipe support plate is connected to (as Fig. 1) on tube sheet by spacing screw rod 2. PhaseBetween adjacent spacing screw rod, between spacing screw rod and tube sheet, be and be threaded. It is locking that spacing screw flight connectsProblem, just becomes the critical problem of spacing screw design.
In addition, the kilowatt pressurized water reactor nuclear power station steam generator that certain is in-service, the spacing screw rod of its use is adoptedInterconnect with screw thread. As shown in Figure 2, at a pipe support plate place, the top, adopt double nut to add pinForm is locking. The locking designing requirement of this form is carried out scene and is joined brill in the time that pipe support plate is installed, and needsCarry out Site Welding.
There is following shortcoming in above-mentioned two kinds of spacing screw rods: due to the requirement of steam generator secondary side to cleannesHigh, on-the-spot processing (as boring, welding etc.) may cause the pollution to steam generator; OnlyA pipe support plate is provided with anti-loose structure everywhere above, in a row spacing screw rod, and any spacing spiral shellThe thread failure of bar, can cause the global failure of permutation spacing screw rod. And due to the spy of bundle of steam generatorDifferent structure, cannot tighten after spacing screw failure again.
Summary of the invention
The object of the present invention is to provide a kind of PWR nuclear power plant steam generator spacing screw rod anti-loose structure.
Technical scheme of the present invention is as follows:
A kind of PWR nuclear power plant steam generator spacing screw rod anti-loose structure, it comprises pipe location-plate and installationMore piece spacing screw rod on pipe location-plate, is processed with deep-slotted chip breaker on described spacing screw rod, described pipeOn sub-location-plate, be processed with rectangle counterbore, it is fixed that two connected joint spacing screw rods are arranged on pipe by rectangle counterboreOn the plate of position, in described rectangle counterbore, be provided with lock washer, this lock washer is sleeved on outside spacing screw rod,And covering deep-slotted chip breaker, lower spacing screw rod is fixedly connected with upper spacing screw rod by screw thread, described lock washerComprise thin cylinder and the rectangular base of energy crimp.
In above-mentioned a kind of PWR nuclear power plant steam generator spacing screw rod anti-loose structure, described goes up mostOutside the upper end of the spacing screw rod of end, be provided with end nut, described end nut is cylindrical, and its outside is provided with arcShape groove and serrate slot.
Remarkable result of the present invention is: owing to being processed with deep-slotted chip breaker on spacing screw rod, make spacing screw rod withWhen pipe support plate is installed, the lock washer of employing can be pressed in deep-slotted chip breaker, thereby makes spacing screw rodCan in pipe support plate, not become flexible, prevent from getting loose. On the spacing screw rod of the top mounting end nut itsOutside is provided with deep-slotted chip breaker and serrate slot, not only can prevent that the spacing screw rod of the top from getting loose, simultaneously owing to addingWork has serrate slot, is also convenient to tightening of end nut.
Brief description of the drawings
Fig. 1 is the position of spacing screw rod in steam generator;
Fig. 2 .1 is certain in-service kilowatt pressurized water reactor nuclear power station steam generator spacing screw-rod structure;
Fig. 2 .2 is Fig. 2 .1 enlarged drawing;
Fig. 3 .1 is spacing screw rod schematic diagram;
Fig. 3 .2 is the A-A cutaway view of Fig. 3 .1;
Fig. 4 .1 is spacing screw rod anti-loose structure schematic diagram of the present invention;
The E-E direction cutaway view of Fig. 4 .2 Fig. 4 .1;
Fig. 5 is lock washer schematic diagram;
Fig. 6 .1 is end nut schematic diagram;
Fig. 6 .2 is the B-B direction cutaway view of Fig. 6 .1;
Fig. 6 .3 is the C-C direction cutaway view of Fig. 6 .1;
In figure: 1. pipe support plate; 2. spacing screw rod; 2.1. go up spacing screw rod; 2.2. descend spacing screw rod; 3. squareShape counterbore; 4. lock washer; 4.1. thin cylinder; 4.2. rectangular base; 5. deep-slotted chip breaker; 6. end nut; 7. toothShape groove.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Fig. 3 .1 and Fig. 3 .2, the upper end of spacing screw rod 2 is processed with external screw thread, and lower end is processed with interior spiral shellLine, and the upper end external diameter of spacing screw rod 2 is identical with bottom diameter, therefore makes multiple spacing screw rods 2 logicalCross and be threaded. On the outside of the centre of spacing screw rod 2, be symmetrily processed with deep-slotted chip breaker 5.
As shown in Fig. 4 .1 and Fig. 4 .2, on pipe support plate 1, process rectangle counterbore 3, what connect is upper fixedBe positioned at rectangle counterbore 3 apart from screw rod 2.1 and lower spacing screw rod 2.2. Lock pad is put in the upper end of rectangle counterbore 3Sheet 4, the upper end of lower spacing screw rod 2.2 is put in the lower end of rectangle counterbore 3.
As shown in Fig. 4 .2 and Fig. 5, lock washer 4 comprises thin cylinder 4.1 and rectangular base 4.2, rectangular baseSeat 4.2 is positioned at the bottom of thin cylinder 4.1. Because the thin cylinder 4.1 of lock washer 4 can push, therefore itsBe pressed in the deep-slotted chip breaker 5 of spacing screw rod 2, can prevent that spacing screw rod from getting loose at pipe support plate 1 internal thread.
At the upper end mounting end nut 6 of spacing screw rod 2 topmost, as Fig. 6 .1, Fig. 6 .2 and Fig. 6 .3 instituteShow, end nut 6 is cylindrical, in evenly processing deep-slotted chip breaker 5 of end nut 6 outsides, lower end, outside, upper endEvenly processing serrate slot 7. When assembling, the thin cylinder of lock washer 4 is pressed in deep-slotted chip breaker 5. Serrate slot 7Be convenient to tightening of end nut.
The spacing screw rod 2 that anti-loose structure of the present invention adopts more piece to be threaded couples together, pipe support plate 1The rectangle counterbore 3 of upper processing, for spacing screw rod 2 is installed, is adopted 3 interior, the outer installations of spacing screw rod 2 of rectangle counterboreLock washer 4, and the position of lock washer 4 correspondences is the deep-slotted chip breakers 5 in spacing screw rod 2 outsides, therefore works asLock washer 4 is pressed in deep-slotted chip breaker 5 owing to compressing to produce to be out of shape, and makes lock washer 5 clamp spacing spiral shellBar 2, prevents that spacing screw rod 2 from getting loose in pipe support plate 1.
Same principle, at spacing screw rod 2 topmost, because upper end does not have deep-slotted chip breaker, therefore must takeMeasure prevents getting loose of spacing screw rod 2 upper ends, thereby saves in the top one outside the upper end of spacing screw rod 2 and pass throughScrew thread mounting end nut 6, these end nut 6 outsides are also processed with deep-slotted chip breaker 5, are also processed with profile of tooth simultaneouslyGroove 7, not only can prevent that the spacing screw rod 2 of the top from getting loose by end nut 6, simultaneously owing to being processed withSerrate slot 7, is also convenient to tightening of end nut 6.
Claims (2)
1. a PWR nuclear power plant steam generator spacing screw rod anti-loose structure, it comprises pipe location-plate (1)More piece spacing screw rod (2) with being arranged on pipe location-plate (1), is characterized in that: described spacing spiral shellOn bar (2), be processed with deep-slotted chip breaker (5), on described pipe location-plate (1), be processed with rectangle counterbore (3),It is upper that the two joint spacing screw rods (2) that are connected are arranged on pipe location-plate (1) by rectangle counterbore (3), described inRectangle counterbore (3) in be provided with lock washer (4), this lock washer (4) is sleeved on spacing screw rod (2.1), and cover deep-slotted chip breaker (5) outward, lower spacing screw rod (2.2) is fixing by screw thread and upper spacing screw rod (2.1)Connect, described lock washer (4) comprises thin cylinder (4.1) and the rectangular base (4.2) of energy crimp.
2. a kind of PWR nuclear power plant steam generator spacing screw rod anti-loose structure as claimed in claim 1, itsBe characterised in that: outside the upper end that the top one of described more piece spacing screw rod (2) is saved, be provided with end nut (6),Described end nut (6) is cylindrical, and its outside is provided with deep-slotted chip breaker (5) and serrate slot (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310139235.4A CN104110431B (en) | 2013-04-22 | 2013-04-22 | PWR nuclear power plant steam generator spacing screw rod anti-loose structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310139235.4A CN104110431B (en) | 2013-04-22 | 2013-04-22 | PWR nuclear power plant steam generator spacing screw rod anti-loose structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104110431A CN104110431A (en) | 2014-10-22 |
| CN104110431B true CN104110431B (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310139235.4A Active CN104110431B (en) | 2013-04-22 | 2013-04-22 | PWR nuclear power plant steam generator spacing screw rod anti-loose structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632839B (en) * | 2015-02-03 | 2016-11-09 | 北京金风科创风电设备有限公司 | Intermediate flange and multi-flange connecting structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2335695Y (en) * | 1998-03-26 | 1999-09-01 | 中国船舶工业总公司第七研究院第七一八研究所 | Drawer type fixed-bed reactor |
| JP2009150492A (en) * | 2007-12-21 | 2009-07-09 | Kenwood Corp | Structure for preventing loosening of screw |
| WO2009140785A1 (en) * | 2008-05-21 | 2009-11-26 | Stmz Schweizerische Tiermeldezentrale Ag | Locking mechanism for a safety collar for a domestic animal |
| CN101832324A (en) * | 2009-03-13 | 2010-09-15 | 西门子公司 | Locking mechanism for nut on screw stem |
| CN201908933U (en) * | 2011-01-20 | 2011-07-27 | 宁波信泰机械有限公司 | Bolt connection structure, stop washer thereof and baggage rack |
| CN203272395U (en) * | 2013-04-22 | 2013-11-06 | 中国核动力研究设计院 | Fixed-pitch threaded rod looseness preventing structure of pressurized water reactor nuclear power plant vapor generator |
-
2013
- 2013-04-22 CN CN201310139235.4A patent/CN104110431B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2335695Y (en) * | 1998-03-26 | 1999-09-01 | 中国船舶工业总公司第七研究院第七一八研究所 | Drawer type fixed-bed reactor |
| JP2009150492A (en) * | 2007-12-21 | 2009-07-09 | Kenwood Corp | Structure for preventing loosening of screw |
| WO2009140785A1 (en) * | 2008-05-21 | 2009-11-26 | Stmz Schweizerische Tiermeldezentrale Ag | Locking mechanism for a safety collar for a domestic animal |
| CN101832324A (en) * | 2009-03-13 | 2010-09-15 | 西门子公司 | Locking mechanism for nut on screw stem |
| CN201908933U (en) * | 2011-01-20 | 2011-07-27 | 宁波信泰机械有限公司 | Bolt connection structure, stop washer thereof and baggage rack |
| CN203272395U (en) * | 2013-04-22 | 2013-11-06 | 中国核动力研究设计院 | Fixed-pitch threaded rod looseness preventing structure of pressurized water reactor nuclear power plant vapor generator |
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| Publication number | Publication date |
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| CN104110431A (en) | 2014-10-22 |
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