CN204537706U - A kind of nuclear power plant voltage stabilizer thermal shock structure - Google Patents
A kind of nuclear power plant voltage stabilizer thermal shock structure Download PDFInfo
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- CN204537706U CN204537706U CN201520042426.3U CN201520042426U CN204537706U CN 204537706 U CN204537706 U CN 204537706U CN 201520042426 U CN201520042426 U CN 201520042426U CN 204537706 U CN204537706 U CN 204537706U
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- thermal shock
- surge line
- voltage stabilizer
- line nozzle
- sleeve 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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Abstract
The utility model discloses a kind of nuclear power plant voltage stabilizer thermal shock structure, comprise the Surge line nozzle be arranged on the low head of voltage stabilizer, be fastened on the Surge line nozzle safe end of described Surge line nozzle end, be set in the thermal shock sleeve pipe in described Surge line nozzle and Surge line nozzle safe end, be arranged on described Surge line nozzle be positioned at mouth of pipe place, voltage stabilizer side and be connected the sustained ring that realizes described thermal shock sleeve pipe to suspend with described thermal shock sleeve pipe, described thermal shock sleeve pipe is provided with annular opening away between voltage stabilizer one end and described Surge line nozzle safe end inner tubal wall, described thermal shock sleeve pipe is positioned at described voltage stabilizer one end and offers some through flow holes, make described thermal shock sleeve pipe, form a upper end between Surge line nozzle and Surge line nozzle safe end to be communicated with described voltage stabilizer by described through flow hole and the semitight annular space that communicates completely with described Surge line nozzle safe end of lower end.
Description
Technical field
The utility model relates to technical field of nuclear power, is specifically related to the thermal shock structure that a kind of nuclear power plant voltage stabilizer uses.
Background technology
Voltage stabilizer is one of key equipment of PWR nuclear power plant, to primary Ioops main system carry out pressure and volume regulation and control, have very important effect to guarantee primary Ioops main system pressure boundary integrity.Reactor coolant loop is a loop being full of high temperature, high pressure boron water.When voltage stabilizer normally runs, its underpart is full of water, and top is full of steam, and water and steam is in the state of a relative equilibrium.In reactor operation process, when primary Ioops coolant temperature raise, volumetric expansion and flow to voltage stabilizer; When primary Ioops coolant temperature reduce, volumetric contraction and flow out voltage stabilizer.Primary Ioops cooling medium, due to the change of temperature, makes the volume of water in loop and reactor change, and the fluid of temperature variation enters through the Surge line nozzle of voltage stabilizer bottom continually or flows out voltage stabilizer.There is larger thermograde in Surge line nozzle body, Surge line nozzle body and Surge line nozzle safe end weld seam, the fluid temperature (F.T.) of frequent variations and flow cause the stress of Surge line piping body, Surge line nozzle safe end and weld seam connected between them constantly to change, the alterante stress of this complexity can cause causing the heat fatigue of component or thermal shock to lose efficacy, and impacts the safety of reactor.Thermal sleeve is set in Surge line nozzle, prevents primary Ioops cooling medium from producing excessive thermal stress when fluctuating inflow and outflow to tube wall, avoiding bearing thermal shock and the Under Thermal Fatigue Damage that causes.
If the flow velocity in the Surge line nozzle of voltage stabilizer is higher, thermal shock sleeve upper end only relies on four boss to support; Because upper end is non-tight structure, under high flow condition, non-tight structure thermal shock sleeve pipe thermal shock effect is more weak.And the radioactive particle produced in reactor operation process is easily gathered in annular space, and form closed annular space because thermal shock its lower end and Surge line nozzle safe end exist to be welded to connect, the radioactive particle produced in reactor operation process is not easy to discharge from thermal shock its lower end, these radioactive particles easily cause high radioactivity dosage rate in the delay of voltage stabilizer bottom deposit, make to need when in-service period carries out inspection and maintenance bottom voltage stabilizer to use special equipment and a large amount of time and manpower, maintenance is difficult and the cycle is long, and cost is high.
Utility model content
The purpose of this utility model is that propose one for above-mentioned technical matters also can play good thermal shock effect under high-temperature high-flow rate environment, can not cause isotopic ion in the nuclear power plant voltage stabilizer thermal shock structure of voltage stabilizer bottom deposit simultaneously.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of nuclear power plant voltage stabilizer thermal shock structure, comprise the Surge line nozzle be arranged on the low head of voltage stabilizer, be fastened on the Surge line nozzle safe end of described Surge line nozzle end, the thermal shock sleeve pipe be set in described Surge line nozzle and Surge line nozzle safe end, be arranged on described Surge line nozzle and be positioned at mouth of pipe place, voltage stabilizer side and be connected the sustained ring that realizes described thermal shock sleeve pipe to suspend with described thermal shock sleeve pipe
Described thermal shock sleeve pipe is provided with annular opening away between voltage stabilizer one end and described Surge line nozzle safe end inner tubal wall,
Described thermal shock sleeve pipe is positioned at described voltage stabilizer one end and offers some through flow holes,
Make to be formed between described thermal shock sleeve pipe, Surge line nozzle and Surge line nozzle safe end upper end to be communicated with described voltage stabilizer by described through flow hole and the semitight annular space that communicates completely with described Surge line nozzle safe end of lower end.
In the utility model, be provided with the overlay cladding that built-up welding corrosion-resistant stainless steel is formed inside described Surge line nozzle, described sustained ring is weldingly fixed on described overlay cladding.
In the utility model, on described sustained ring, circumference offers some openings, accelerates the circulating rate of cooling medium in described annular space.
In the utility model, described sustained ring is provided with joint flange, described thermal shock sleeve upper end is connected with the casing flange matched with described joint flange, and described thermal shock sleeve pipe is hung by described joint flange and casing flange and is arranged on described sustained ring.
In the utility model, described Surge line nozzle is positioned at the voltage stabilizer side mouth of pipe and is provided with the filter mantle that the described Surge line nozzle of covering is positioned at the voltage stabilizer side mouth of pipe, described filter mantle is provided with the filter mantle flange matched with described joint flange, and described filter mantle is fixed on described sustained ring by described joint flange and filter mantle flange.
In the utility model, be positioned at described voltage stabilizer side in described annular space near the junction of described Surge line nozzle and Surge line nozzle safe end and be provided with boss for supporting described thermal shock sleeve pipe, described boss to be arranged on described thermal shock sleeve pipe and and to have the radial play of 0.5mm ~ 0.7mm between described Surge line nozzle inner tubal wall.
In the utility model, the annular opening place that described Surge line nozzle safe end is positioned at described annular space is provided with the arc transition portion to tilting away from voltage stabilizer one end.
The utility model is by adopting the thermal shock sleeve structure of semiclosed suspension, greatly reduce the gathering of radioactive particle at annular space, simultaneously by arranging annular opening at thermal shock its lower end, the particle being gathered in annular space is discharged smoothly, avoid radioactive particle at voltage stabilizer bottom deposit, reduce the difficulty of the inspection and maintenance of in-service period bottom voltage stabilizer, reduce the irradiation to maintainer, reduce the cost of overhaul.
Thermal shock sleeve upper end adopts Semi-seal structure, under high temperature, high flow rate environment, effectively reduce the fluid temperature (F.T.) that Surge line piping body and weld seam bear frequent variations impact the alterante stress brought, prevent Surge line piping body and weld seam from producing Under Thermal Fatigue Damage, effectively reduce thermal shock.
Accompanying drawing explanation
Fig. 1 is the overall schematic of the thermal shock device of prior art in the utility model one embodiment;
Fig. 2 is the structural representation of the nuclear power plant voltage stabilizer thermal shock structure in the utility model one embodiment;
Fig. 3 is the structure for amplifying schematic diagram at I place in Fig. 2;
Fig. 4 is A-A sectional structure schematic diagram in Fig. 2;
Fig. 5 is the structure for amplifying schematic diagram at II place in Fig. 2.
Embodiment
In order to be illustrated more clearly in the technical solution of the utility model, below in conjunction with drawings and Examples, the technical solution of the utility model is further elaborated, apparently, the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other embodiment can also be obtained according to these embodiments.
With reference to Fig. 1, the thermal shock sleeve pipe 7 of the voltage stabilizer Surge line nozzle 2 that PWR nuclear power plant common at present uses generally adopts thermal shock set upper side to arrange the non-tight structure of four supporting boss.The top of the thermal shock sleeve pipe 7 of open architecture is directly communicated with voltage stabilizer inside.When flow velocity is lower, be generally less than 3m/s, the interior coolant temperature rate of change of annular space 9 is less, and thermal resistance is comparatively large, and thermal shock sleeve pipe 7 can play good protective effect.At that time when flow velocity is higher, be generally greater than 3m/s, can produce strong cold fluid and hot fluid mixing in annular space 9, annular space 9 inner fluid temperature variation is violent, and now, thermal shock sleeve pipe 7 loses thermal insulation protection effect substantially.Thermal shock sleeve pipe 7 lower end and Surge line nozzle safe end 4 are welded to connect the annular space 9 fixed and formed and close in addition, the radioactive particle produced in reactor operation process is not easy discharge from thermal shock sleeve pipe 7 lower end and at annular space 9 bottom deposit, bring inconvenience greatly and higher cost to the inspection and maintenance bottom voltage stabilizer in-service period.
For solving the problems of the technologies described above, the utility model proposes a kind of nuclear power plant voltage stabilizer thermal shock structure, with reference to Fig. 2, comprise be arranged on the low head 1 of voltage stabilizer for Surge line piping body being connected to the Surge line nozzle 2 on voltage stabilizer, the Surge line nozzle safe end 4 being weldingly fixed on Surge line nozzle 2 end by weld seam 33, the thermal shock sleeve pipe 7 be set in Surge line nozzle 2 and Surge line nozzle safe end 4, be arranged on Surge line nozzle 2 and be positioned at mouth of pipe place, voltage stabilizer side and be connected the sustained ring 6 that realizes thermal shock sleeve pipe 7 to suspend with thermal shock sleeve pipe 7.With reference to Fig. 3, be provided with the overlay cladding 5 that built-up welding corrosion-resistant stainless steel is formed inside Surge line nozzle 2, sustained ring 6 is weldingly fixed on overlay cladding 5, avoids damaging the inner structure of Surge line nozzle 2.
With reference to Fig. 5, thermal shock sleeve pipe 7 extends in Surge line nozzle safe end 4 to away from voltage stabilizer one end, annular opening 17 is provided with between thermal shock sleeve pipe 7 lower end and Surge line nozzle safe end 4 inner tubal wall, thermal shock sleeve pipe 7 is made to form open architecture away from voltage stabilizer one end, with reference to Fig. 3, thermal shock sleeve pipe 7 is positioned at voltage stabilizer one end circumference and offers some through flow holes 14 be connected with voltage stabilizer, make thermal shock sleeve pipe 7, form a upper end between Surge line nozzle 2 and Surge line nozzle safe end 4 to be communicated with voltage stabilizer by through flow hole 14 and the semitight annular space 9 that communicates completely of lower end and Surge line nozzle safe end 4.Thermal shock sleeve pipe 7 top Semi-seal structure, substantially completely cut off annular space 9 inner fluid to be directly communicated with voltage stabilizer internal flow, make the temperature variation of the cooling medium in annular space 9 substantially not by the impact of coolant flow speed in Surge line nozzle 2 pipeline, and due to the cooling medium in Semi-seal structure annular space 9 be carry out heat trnasfer with heat transfer free convection, there is larger thermal resistance, good heat insulation protecting against shock effect can be played, make Surge line nozzle 2 exempt from heat fatigue to destroy or thermal shock, also the nuclear power plant voltage stabilizer thermal shock structure described in the utility model can be made under high-temperature high-flow rate environment also to play good thermal shock effect simultaneously.The semi-closed structure that thermal shock sleeve pipe 7 is positioned at voltage stabilizer one end simultaneously can reduce the gathering of radioactive particle at annular space 9 greatly.
When in voltage stabilizer during cooling medium high flow, because sustained ring 6 is projecting, fluid is formed sustained ring 6 and impacts.Therefore, with reference to Fig. 4, on sustained ring 6, circumference offers the opening 13 of some semicircular structures, the circulating rate of cooling medium in annular space 9 can be accelerated while reducing fluid and sustained ring 6 is impacted, ensure the stability of sustained ring 6 mechanism and fast radioactive particle gone out in annular space 9.
In one embodiment, with reference to Fig. 3, sustained ring 6 upper end size thickeies and evenly offers 20 threaded holes 11 along upper surface circumference and forms joint flange 61, thermal shock sleeve pipe 7 upper end is connected with the casing flange 8 of the band flanging matched with joint flange 61, casing flange 8 is provided with 20 threaded holes 11 corresponding with joint flange 61, and thermal shock sleeve pipe 7 uses screw 12 to hang by joint flange 61 and casing flange 8 and is fixed on sustained ring 6.
In one embodiment, with reference to Fig. 2, Surge line nozzle 2 is positioned at the voltage stabilizer side mouth of pipe and is provided with the filter mantle 10 that covering Surge line nozzle 2 is positioned at the voltage stabilizer side mouth of pipe, filter mantle 10 is provided with the filter mantle flange 101 matched with joint flange 61, and filter mantle 10 is fixed on sustained ring 6 by joint flange 61 and filter mantle flange 101.
In one embodiment, when ductwork pressure fluctuation is larger, flow into or flow out the higher and change of the coolant flow speed of voltage stabilizer sharply, the amplitude of the thermal shock sleeve pipe 7 being arranged on voltage stabilizer gateway can be caused, because thermal shock sleeve pipe 7 hangs to install, easy and Surge line nozzle 2 and/or Surge line nozzle safe end 4 inner side tube wall touches and damages or damage.The Damage and Fracture of thermal shock sleeve pipe 7 is caused in inflow or the vibration of flowing out in voltage stabilizer process for preventing cooling medium, with reference to Fig. 2 and Fig. 4, be positioned at voltage stabilizer side near the weld seam 3 between Surge line nozzle 2 and Surge line nozzle safe end 4 in annular space 9 and be provided with boss 15 for supporting spacing thermal shock sleeve pipe 7, boss 15 to be arranged on thermal shock sleeve pipe 7 and and there is between Surge line nozzle 2 inner tubal wall the radial play of 0.5mm ~ 0.7mm, avoid thermal shock sleeve pipe 7 because semi-girder mounting structure causes destroying because of flowing vibration when cooling medium flows into or flow out voltage stabilizer.
If thermal shock sleeve pipe 7 lower end of voltage stabilizer Surge line nozzle 2 and Surge line nozzle safe end 4 are designed to enclosed construction, only lean against on thermal shock sleeve pipe 7 and offer the circulation of through hole for cooling medium, the radioactive particle produced in then reactor operation process is not easy to discharge in annular space 9, brings inconvenience greatly and higher cost to the inspection and maintenance bottom voltage stabilizer in-service period.For addressing this problem, with reference to Fig. 5, the utility model arranges annular opening 17 between thermal shock sleeve pipe 7 lower end and Surge line nozzle safe end 4 inner tubal wall, thermal shock sleeve pipe 7 is made to form open architecture away from voltage stabilizer one end, the annular space 9 of thermal shock sleeve pipe 7 is communicated with pipe interior space by this annular opening 17, and radioactive particle is easy to annular opening 17 thus and discharges.Preferably, annular opening 17 place that Surge line nozzle safe end 4 is positioned at annular space 9 is provided with the arc transition portion 16 to tilting away from voltage stabilizer one end.The transition arc in this arc transition portion 16 not only can make the radioactive particle of gathering be easier to annularly opening 17 to discharge, the simultaneously also bootable transverse direction stream entering annular space 9, reduce in annular space 9 and occur cooling medium turbulent flow or turbulent flow, reduce the fluid oscillation of thermal shock sleeve pipe 7, improve the structural stability of thermal shock sleeve pipe 7.
In the utility model, thermal shock sleeve pipe 7 upper end has suspension Semi-seal structure, greatly can reduce the gathering of radioactive particle at annular space 9, lower end has annular opening 17 simultaneously, can be easier to discharge the particle being gathered in annular space 9, reduce the difficulty of the inspection and maintenance of in-service period bottom voltage stabilizer, reduce the irradiation to maintainer, reduce the cost of overhaul; Thermal shock sleeve pipe 7 upper end adopts Semi-seal structure simultaneously, under high temperature, high flow rate environment, effectively can reduce the fluid temperature (F.T.) that Surge line piping body and weld seam 3 bear frequent variations impact, the alterante stress that minimizing Surge line piping body and weld seam 3 bear, reduce thermal shock, prevent Surge line piping body and weld seam 3 from producing Under Thermal Fatigue Damage.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (7)
1. a nuclear power plant voltage stabilizer thermal shock structure, it is characterized in that, comprise be arranged on voltage stabilizer low head (1) on Surge line nozzle (2), be fastened on the Surge line nozzle safe end (4) of described Surge line nozzle (2) end, be set in the thermal shock sleeve pipe (7) in described Surge line nozzle (2) and Surge line nozzle safe end (4), be arranged on described Surge line nozzle (2) be positioned at mouth of pipe place, voltage stabilizer side and be connected the sustained ring (6) that realizes described thermal shock sleeve pipe (7) to suspend with described thermal shock sleeve pipe (7),
Described thermal shock sleeve pipe (7) is provided with annular opening (17) away between voltage stabilizer one end and described Surge line nozzle safe end (4) inner tubal wall;
Described thermal shock sleeve pipe (7) is positioned at described voltage stabilizer one end and offers some through flow holes (14);
Form upper end between described thermal shock sleeve pipe (7), Surge line nozzle (2) and Surge line nozzle safe end (4) to be communicated with voltage stabilizer by described through flow hole (14) and the semitight annular space (9) that communicates completely with described Surge line nozzle safe end (4) of lower end.
2. a kind of nuclear power plant voltage stabilizer thermal shock structure as claimed in claim 1, it is characterized in that, described Surge line nozzle (2) inner side is provided with the overlay cladding (5) that built-up welding corrosion-resistant stainless steel is formed, and described sustained ring (6) is weldingly fixed on described overlay cladding (5).
3. a kind of nuclear power plant voltage stabilizer thermal shock structure as claimed in claim 1, is characterized in that, the upper circumference of described sustained ring (6) offers some openings (13).
4. a kind of nuclear power plant voltage stabilizer thermal shock structure as claimed in claim 1, it is characterized in that, described sustained ring (6) is provided with joint flange (61), described thermal shock sleeve pipe (7) upper end be connected with match with described joint flange (61) for described thermal shock sleeve pipe (7) being hung the casing flange (8) be arranged on described sustained ring (6).
5. a kind of nuclear power plant voltage stabilizer thermal shock structure as claimed in claim 4, it is characterized in that, described Surge line nozzle (2) is positioned at the voltage stabilizer side mouth of pipe and is provided with and hides described Surge line nozzle (2) and be positioned at the filter mantle (10) of the voltage stabilizer side mouth of pipe, described filter mantle (10) be provided with match with described joint flange (61) for described filter mantle (10) being fixed on the filter mantle flange (101) on described sustained ring (6).
6. a kind of nuclear power plant voltage stabilizer thermal shock structure as claimed in claim 1, it is characterized in that, be positioned at described voltage stabilizer side in described annular space (9) near described Surge line nozzle (2) and the junction of Surge line nozzle safe end (4) and be provided with boss (15) for supporting described thermal shock sleeve pipe (7), it is upper and and have the radial play of 0.5mm ~ 0.7mm between described Surge line nozzle (2) inner tubal wall that described boss (15) is arranged on described thermal shock sleeve pipe (7).
7. a kind of nuclear power plant voltage stabilizer thermal shock structure as claimed in claim 1, it is characterized in that, annular opening (17) place that described Surge line nozzle safe end (4) is positioned at described annular space (9) is provided with the arc transition portion (16) to tilting away from voltage stabilizer one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520042426.3U CN204537706U (en) | 2015-01-21 | 2015-01-21 | A kind of nuclear power plant voltage stabilizer thermal shock structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520042426.3U CN204537706U (en) | 2015-01-21 | 2015-01-21 | A kind of nuclear power plant voltage stabilizer thermal shock structure |
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| CN204537706U true CN204537706U (en) | 2015-08-05 |
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| CN201520042426.3U Active CN204537706U (en) | 2015-01-21 | 2015-01-21 | A kind of nuclear power plant voltage stabilizer thermal shock structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256220A (en) * | 2018-09-20 | 2019-01-22 | 中广核研究院有限公司 | The connection structure of voltage-stablizer and its assignment of traffic cover and solar heat protection casing |
| CN110828005A (en) * | 2019-11-08 | 2020-02-21 | 中广核工程有限公司 | Thermal shock prevention sleeve assembly for voltage stabilizer of nuclear power station |
-
2015
- 2015-01-21 CN CN201520042426.3U patent/CN204537706U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256220A (en) * | 2018-09-20 | 2019-01-22 | 中广核研究院有限公司 | The connection structure of voltage-stablizer and its assignment of traffic cover and solar heat protection casing |
| CN110828005A (en) * | 2019-11-08 | 2020-02-21 | 中广核工程有限公司 | Thermal shock prevention sleeve assembly for voltage stabilizer of nuclear power station |
| CN110828005B (en) * | 2019-11-08 | 2023-09-08 | 中广核工程有限公司 | Nuclear power station voltage stabilizer thermal shock prevention sleeve assembly |
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