CN203417802U - Sludge cleaning nozzle device used for steam generator in EPR type nuclear power plant - Google Patents
Sludge cleaning nozzle device used for steam generator in EPR type nuclear power plant Download PDFInfo
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- CN203417802U CN203417802U CN201320480397.XU CN201320480397U CN203417802U CN 203417802 U CN203417802 U CN 203417802U CN 201320480397 U CN201320480397 U CN 201320480397U CN 203417802 U CN203417802 U CN 203417802U
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- shower nozzle
- steam generator
- connecting rod
- rotating shaft
- gun connecting
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Abstract
The utility model relates to a sludge cleaning nozzle device used for a steam generator in an EPR type nuclear power plant. The sludge cleaning nozzle device used for the steam generator in the EPR type nuclear power plant comprises a spraying gun connecting rod and three nozzles, wherein the spraying gun connecting rod is coaxially provided with a rotatable transmission shaft. The nozzles are detachably installed on the end portion of the spraying gun connecting rod alternately, the front end of each nozzle can make circumferential rotation in the A-A cross section of the nozzle under the driving of the transmission shaft, and the included angles between the axial leads of the front ends of the nozzles and the axial lead of a rotary shaft are 60 degrees, 0 degree and -60 degrees respectively. Because the sludge cleaning nozzle device used for the steam generator is provided with the three nozzles with different angles, water can be sprayed at different angles to clean the steam generator, and therefore the cleaning effect on the steam generator is improved; besides, because the front ends of the nozzles can rotate within 180 degrees under the driving of the transmission shaft, heat transfer pipes of the whole steam generator can be cleaned, and working efficiency is improved.
Description
Technical field
The utility model relates to a kind of cleaning device, is specifically related to a kind of for EPR heap type Steam Generators in NPP body refuse cleaning ejecting device.
Background technology
Steam generator is one of visual plant of nuclear power plant, plays one, heat exchange and the buffer action of secondary circuit.Steam generator secondary side under long-term Power operation easily produces subsidence settling at cold and hot boundary end, through great many of experiments, shows that the body refuse of deposition can reduce the heat transfer efficiency of steam generator internal heat transfer pipe and increase the damaged probability of heat-transfer pipe.Therefore in order to remove this type of dislodged sludge, during nuclear power plant's overhaul, all can carry out the body refuse cleaning for steam generator secondary side.
At present both at home and abroad all exploitation has the body refuse cleaning equipment that is applied to different IPs power plant heap type, if the body refuse cleaning equipment of France's development is in Daya Bay nuclear power plant's successful Application more than ten years.All there are corresponding special equipment in the U.S., Japan, Korea S for the exploitation of own national nuclear power plant simultaneously.These equipment major parts possess identical principle: the target area of high-pressure water shot being removed contamination to needs by the spray gun propulsive mechanism of changing manually or automatically, utilize retracting device that the body refuse water that remains in steam generator tube sheet secondary side is recycled and re-used simultaneously, realize the cleaning to steam generator secondary side on the basis of water circulation.
What domestic application was the widest now is rigid sludge cleaning means, and its shower nozzle is only applicable to the steam generator that heat-transfer pipe is rectanglar arrangement, and the direction of water jet and the direction of shower nozzle can not change.And the heat-transfer pipe 6 that develops into the steam generator of the third generation of today Europe advanced pressurized water reactor (EPR) heap type is to adopt equilateral triangle to arrange, as shown in Figure 1, this setup is conducive to the sufficient heat exchange of heat-transfer pipe, has saved floor space, has but increased the difficulty that its body refuse cleans.In order to solve this difficult problem, design a kind of ejecting device that is applicable to the steam generator heat-transfer pipe that equilateral triangle arranges and just seem that tool has very important significance.
Summary of the invention
The utility model object is that a kind of ejecting device that steam generator heat-transfer pipe that equilateral triangle arranges and water jet direction can change that is applicable to is provided in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the utility model is: a kind of for EPR heap type Steam Generators in NPP body refuse cleaning ejecting device, it comprises:
Spray gun connecting rod, is coaxially arranged with rotating power transmission shaft in described spray gun connecting rod;
Three shower nozzles, described three shower nozzles are alternately removably mounted on described spray gun connecting rod end, it comprises nozzle housing, be located at the central and described rotating shaft that power transmission shaft is coaxial and bond connected connects of nozzle housing, the shower nozzle front end that seals mutually and be connected with described rotating shaft with described nozzle housing, described shower nozzle front end comprises the punching chamber of offering at Yan Qi center, perpendicular with described punching chamber and be communicated with the spray orifice of offering, between described spray gun connecting rod and power transmission shaft, between nozzle housing and rotating shaft, be formed with the water stream channel being connected with described punching chamber, in three described shower nozzles, the axial line angle of the shower nozzle front end axial line of one of them shower nozzle and described rotating shaft is 0 °, the angle of the axial line of the shower nozzle front end axial line of two other shower nozzle and described rotating shaft is respectively ± and 60 °.
Optimally, described power transmission shaft is connected with rotating shaft by spline, and described rotating shaft is connected with shower nozzle front end by gear pair.
Further, described gear pair adopts bevel gear.
Optimally, described spray gun connecting rod is fixed with shower nozzle phase bolt.
Optimally, between described spray gun connecting rod and shower nozzle, use seal with elastometic washer.
Optimally, between described nozzle housing and shower nozzle front end, use packing seal.
Because technique scheme is used, the utility model compared with prior art has following advantages: the ejecting device that the utility model steam generator body refuse cleans is joined the shower nozzle of three different angles, can spray water steam generator is cleaned from different perspectives, improve the cleaning effect of steam generator; Shower nozzle front end can be done 180 ° of rotations under the drive of power transmission shaft in addition, thereby whole steam generator heat-transfer pipe is cleaned, and has improved operating efficiency.
Accompanying drawing explanation
The steam generator heat-transfer pipe that accompanying drawing 1 is existing EPR heap type is arranged the structural representation that is equilateral triangle;
Accompanying drawing 2 is that the utility model steam generator body refuse cleans ejecting device use view;
Accompanying drawing 3 is that accompanying drawing 2 steam generator body refuses clean shower nozzle front cross-sectional view in ejecting device;
Accompanying drawing 4 is that the utility model steam generator body refuse cleans ejecting device use view;
Accompanying drawing 5 is that the utility model steam generator body refuse cleans ejecting device use view;
Wherein: 1, spray gun connecting rod; 2, shower nozzle; 21, nozzle housing; 22, rotating shaft; 23, shower nozzle front end; 231, punching chamber; 232, spray orifice; 2 ', shower nozzle; 21 ', nozzle housing; 22 ', rotating shaft; 23 ', shower nozzle front end; 231 ', punching chamber; 232 ', spray orifice; 2 ' ', shower nozzle; 21 ' ', nozzle housing; 22 ' ', rotating shaft; 23 ' ', shower nozzle front end; 231 ' ', punching chamber; 232 ' ', spray orifice; 3, water stream channel; 4, spline; 5, bevel gear; 6, steam generator heat-transfer pipe; 7, steam generator heat-transfer pipe corridor dividing plate.
The specific embodiment
Below in conjunction with embodiment shown in the drawings, the utility model is further described.
The heat-transfer pipe 6 of Europe third generation EPR heap type Steam Generators in NPP is equilateral triangle arranges, and as shown in Figure 1, has both been conducive to the sufficient heat exchange of heat-transfer pipe, has increased again the stacking degree of heat-transfer pipe, has saved floor space.Yet such set-up mode has increased the difficulty that its body refuse cleans, a that need to mark from Fig. 1, b, tri-directions of c to heat-transfer pipe 6 water sprays, can clean up body refuse respectively.Heat-transfer pipe 6 belows are provided with heat transfer piping lane dividing plate 7 simultaneously, and body refuse cleaning device can only be installed in the gap between heat-transfer pipe 6 and heat transfer piping lane dividing plate 7 in use, the limited space that can use.
The ejecting device that the utility model body refuse cleans is applicable to heat-transfer pipe, and to be that equilateral triangle is arranged and institute takes up space less, it mainly comprises spray gun connecting rod 1 and three shower nozzles, wherein in spray gun connecting rod 1, be provided with 11, three shower nozzles of power transmission shaft and be alternately removably mounted on spray gun connecting rod 1 end.
As shown in Figure 2 and Figure 3, shower nozzle 2 mainly comprises nozzle housing 21, rotating shaft 22, shower nozzle front end 23.Rotating shaft 22 is coaxially arranged at nozzle housing 21 central authorities, and its one end and power transmission shaft 11 bond connecteds connect, and while rotating under the driving of power transmission shaft 11 at servomotor, can drive its synchronous rotary; Its other end is connected with shower nozzle front end 23, thereby drives shower nozzle front end 23 to make circumferential movement in its A-A cross section.Shower nozzle front end 23 comprises punching chamber 231 and spray orifice 232, spray orifice 232 connections are offered and are perpendicular with punching chamber 231, space between space, nozzle housing 21 and rotating shaft 22 between they and spray gun connecting rod 1 and power transmission shaft 11 is interconnected and forms water stream channel 3, for delivery of water under high pressure.Shower nozzle front end 23 axial lines and rotating shaft 22 axial line angles are 60 °, so the c direction in the water outlet direction corresponding diagram 1 of shower nozzle 2.
In the present embodiment, rotating shaft 22 one end are connected with power transmission shaft 11 use splines 4, thereby make rotating shaft 22 under the drive of power transmission shaft 11, in its cross section, rotate in a circumferential direction; Rotating shaft 22 other ends are connected with shower nozzle front end 23 with bevel gear 5, thereby are the circumferential movement of shower nozzle front end 23 in its A-A cross section by the conversion of motion of rotating shaft 22.By controlling the anglec of rotation of power transmission shaft 11, the anglec of rotation of shower nozzle front end 23 in its A-A cross section be can control, thereby reach, the incident angle of water jet between heat-transfer pipe tube gap and the object of distance controlled.In order to keep the pressure of water under high pressure, the sealing between shower nozzle front end 23 and nozzle housing 21 adopts gland sealed form, and the sealing means between spray gun connecting rod 1 and shower nozzle 2 adopts O type rubber ring.
As shown in Figure 4, Figure 5, shower nozzle 2 ', shower nozzle 2 ' ' overall structure and shower nozzle 2 roughly the same, different, the axial line angle of their shower nozzle front end axial line and rotating shaft is respectively 0 ° ,-60 °, thereby water outlet direction is different, the corresponding b of difference, a both direction.In the present embodiment, spray gun connecting rod 1 and three shower nozzles are alternately fixed by four bolts, after using 2 pairs of c directions of shower nozzle to clean, fast bolt is outwarded winding, change respectively shower nozzle 2 ', shower nozzle 2 ' ', again b, a both direction are cleaned, can complete the cleaning to heat-transfer pipe, greatly improved the clean-up performance of heat-transfer pipe 6 and workman's operating efficiency.
Above-mentionedly the utility model cleaned to ejecting device structure for EPR heap type Steam Generators in NPP body refuse be illustrated, below its operation principle is briefly explained:
In use, select shower nozzle 2 to be installed on spray gun connecting rod 1 end, together with step device, be fixed on the flange at steam generator hand hole place subsequently; The power transmission shaft of spray gun connecting rod 1 11 is connected with the servomotor in flange outside, switch on power, utilize servomotor to drive power transmission shaft 11 to do circumferential movement, and then drive driving rotating shaft 22 to rotate together, the conversion of motion of rotating shaft 22 is the circumferential movement of shower nozzle front end 23 in its A-A cross section the most at last, so just the anglec of rotation of power transmission shaft 11 be can pass through to control, thereby water jet incident angle and distance on heat-transfer pipe controlled; Water under high pressure sprays clean body refuse from spray orifice 232 to c direction through water stream channel 3 simultaneously, starts the length that step device regulates spray gun connecting rod 1 to enter steam generator, can clean the body refuse on heat-transfer pipe 6 in the Different Plane parallel with c direction; After the body refuse in c direction cleans up, cleaning device is taken out and changes respectively shower nozzle 2 ' and shower nozzle 2 ' ', similarly the body refuse in b, a direction is cleaned up.
From above-mentioned principle, be not difficult to find, when heat-transfer pipe is arranged according to rectangle or Else Rule shape, still can adopt with the similar body refuse cleaning of the utility model ejecting device heat-transfer pipe is cleaned, only need change simply the angle of the axial line angle of shower nozzle front end axial line and rotating shaft.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (6)
1. for EPR heap type Steam Generators in NPP body refuse, clean an ejecting device, it is characterized in that: it comprises:
Spray gun connecting rod, is coaxially arranged with rotating power transmission shaft in described spray gun connecting rod;
Three shower nozzles, described three shower nozzles are alternately removably mounted on described spray gun connecting rod end, it comprises nozzle housing, be located at the central and described rotating shaft that power transmission shaft is coaxial and bond connected connects of nozzle housing, the shower nozzle front end that seals mutually and be connected with described rotating shaft with described nozzle housing, described shower nozzle front end comprises the punching chamber of offering at Yan Qi center, perpendicular with described punching chamber and be communicated with the spray orifice of offering, between described spray gun connecting rod and power transmission shaft, between nozzle housing and rotating shaft, be formed with the water stream channel being connected with described punching chamber, in three described shower nozzles, the axial line angle of the shower nozzle front end axial line of one of them shower nozzle and described rotating shaft is 0 °, the angle of the axial line of the shower nozzle front end axial line of two other shower nozzle and described rotating shaft is respectively ± and 60 °.
2. according to claim 1ly for EPR heap type Steam Generators in NPP body refuse, clean ejecting device, it is characterized in that: described power transmission shaft is connected with rotating shaft by spline, described rotating shaft is connected with shower nozzle front end by gear pair.
3. according to claim 2 for EPR heap type Steam Generators in NPP body refuse cleaning ejecting device, it is characterized in that: described gear pair adopts bevel gear.
4. according to claim 1 and 2 for EPR heap type Steam Generators in NPP body refuse cleaning ejecting device, it is characterized in that: described spray gun connecting rod is fixed with shower nozzle phase bolt.
5. according to claim 1 and 2 for EPR heap type Steam Generators in NPP body refuse cleaning ejecting device, it is characterized in that: between described spray gun connecting rod and shower nozzle, use seal with elastometic washer.
6. according to claim 1 and 2 for EPR heap type Steam Generators in NPP body refuse cleaning ejecting device, it is characterized in that: between described nozzle housing and shower nozzle front end, use packing seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320480397.XU CN203417802U (en) | 2013-08-07 | 2013-08-07 | Sludge cleaning nozzle device used for steam generator in EPR type nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320480397.XU CN203417802U (en) | 2013-08-07 | 2013-08-07 | Sludge cleaning nozzle device used for steam generator in EPR type nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203417802U true CN203417802U (en) | 2014-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320480397.XU Withdrawn - After Issue CN203417802U (en) | 2013-08-07 | 2013-08-07 | Sludge cleaning nozzle device used for steam generator in EPR type nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203417802U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406226A (en) * | 2013-08-07 | 2013-11-27 | 中广核检测技术有限公司 | Vapor generator sludge washing nozzle device for EPR (European pressurized reactor) type nuclear power plant |
| WO2020034099A1 (en) * | 2018-04-27 | 2020-02-20 | 诚城有限公司 | Spray head structure |
| US11931760B2 (en) | 2018-08-14 | 2024-03-19 | Ecp Incorporated | Spray head structure |
-
2013
- 2013-08-07 CN CN201320480397.XU patent/CN203417802U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406226A (en) * | 2013-08-07 | 2013-11-27 | 中广核检测技术有限公司 | Vapor generator sludge washing nozzle device for EPR (European pressurized reactor) type nuclear power plant |
| CN103406226B (en) * | 2013-08-07 | 2015-06-17 | 中广核检测技术有限公司 | Vapor generator sludge washing nozzle device for EPR (European pressurized reactor) type nuclear power plant |
| WO2020034099A1 (en) * | 2018-04-27 | 2020-02-20 | 诚城有限公司 | Spray head structure |
| US11931760B2 (en) | 2018-08-14 | 2024-03-19 | Ecp Incorporated | Spray head structure |
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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: 20140205 Effective date of abandoning: 20150617 |
|
| RGAV | Abandon patent right to avoid regrant |