CN104008781A - Side-stream-prevention direct safely injecting flow guide element as well as direct safely injecting device - Google Patents
Side-stream-prevention direct safely injecting flow guide element as well as direct safely injecting device Download PDFInfo
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- CN104008781A CN104008781A CN201410215636.8A CN201410215636A CN104008781A CN 104008781 A CN104008781 A CN 104008781A CN 201410215636 A CN201410215636 A CN 201410215636A CN 104008781 A CN104008781 A CN 104008781A
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- safety injection
- stream
- direct safety
- direct
- conducting element
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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 side-stream-prevention direct safely injecting stream guide element which is suitable for butt joint with a direct safely injecting pipe nozzle outlet and then is used for guiding safely injected water. The side-stream-prevention direct safely injecting stream guide element is characterized by comprising a stream guide pipe body which is hollow and bends downward and is provided with a stream inlet and a stream outlet downward, wherein the stream inlet is in butt joint and communicated with the direct safely injecting pipe nozzle outlet; the stream outlet is of a flat structure, and the caliber from the stream inlet to the stream outlet increases gradually. The side-stream-prevention direct safely injecting stream guide element has a favorable stream guide property, guiding property and side stream prevention property by virtue of the stream guide pipe body bending downwards and the stream outlet with the flat structure. Additionally, the invention also discloses a direct safely injecting device with the side-stream-prevention direct safely injecting stream guide element.
Description
Technical field
The present invention relates to a kind of nuclear reactor safety equipment, relate in particular to a kind of anti-side stream type direct safety injection conducting element and direct safety injection device of nuclear reactor pressure container.
Background technology
Along with the maturation of nuclear energy uses technology, the security of nuclear power station is also improved constantly, the construction of the nuclear power station important energy source guarantee that becomes national development gradually.
In current nuclear power station, the structure of nuclear reactor is: in containment, form reactor cavity, in heap chamber, pressure vessel is set.Pressure vessel is connected with cold leg and heat pipe section, injects cooling medium by cold leg, pressure vessel is carried out cooling, then discharges by heat pipe section.
In the time of nuclear reactor generation cold leg fracture accident or major accident, the cooling medium that is injected into the cold leg that fracture occurs will flow directly into containment, thereby can not carry out effective cooling to reactor core; Can not carry out cooling technical matters to reactor core for what solve that above-mentioned accident causes, therefore need to arrange safety injection system.
Safety injection system is again " emergence core stacking cool system ", its major function is: cause loss of-coolant accident (LOCA) (English: Lost of coolant accident when nuclear power generating equipment one circuit system breaks or ruptures, Chinese: loss of-coolant accident (LOCA), be called for short LOCA) time, safety injection system is to reactor core water filling, guarantee is flooded and cooling reactor core, prevents core meltdown, keeps the integrality of reactor core; In the time that generation main steam line breaks, reactor coolant shrinks owing to being subject to sub-cooled, and voltage stabilizer water level declines, and safety injection system injects high concentration boron water to a loop, re-establish voltage stabilizer water level, rapidly shutdown prevent that reactor is owing to crossing cold and recovery of critical.For realizing above-mentioned functions, when safety injection system must can be according to accident, the situation of one circuit system pressure drop is injected under different stress levels.
In safety injection system, whether the design of an important parts peace dispensing device is reasonable, the effect that enters reactor core for safety injection water is very important, and current existing peace dispensing device Shortcomings in the water conservancy diversion to safety injection water, guided bone and anti-by-pass flow, thereby affect its effect.Below respectively existing peace dispensing device is carried out to necessary explanation:
In pressurized water reactor design in one's early years, peace note is taken over and is mounted on a primary loop piping, as the CPR1000 reactor of Daya Bay nuclear power plant of China and follow-up a large amount of construction.In order to improve peace note validity, some reactors have adopted peace note to take over the design being arranged on reactor pressure vessel, as AP1000 reactor.Adopt main pipeline peace note, in the time of main pipeline fracture or cut, may occur pacifying water filling and can not effectively pacify the situation of note.Direct safety injection is owing to directly entering reactor decline ring cavity, so improved peace note validity.
Although direct safety injection has improved the validity of peace note, in the time of main pipeline fracture or cut, in piling under the effect of gas, still may there is the situation of peace note by-pass flow, in order to improve peace note validity, some design by specific structural design, have realized peace beam body and have turned and flow downwards.As shown in Figure 1, U.S. Patent Publication No. is that US5377242 discloses a kind of peace dispensing device, this peace dispensing device is that a rectangular chamber 30` is set between pressure vessel 10` and hanging basket 20`, the outlet 41` of the direct safety injection ozzle 40` therewith import of rectangular chamber 30` is relative, the diversion component that plays transitional function is not set between the two, thereby directly make safety injection water along rectangular chamber 30` to pressure vessel 10` flows, accelerate safety injection water flowing to reactor core; This peace dispensing device is because centre does not arrange guiding device, causes the thermal shock power that in peace note process, pipeline and pressure vessel 10` bear larger, and safety injection water flows downward inhomogeneous along rectangular chamber 30`, thereby produces concussion, and anti-by-pass flow is poor.
As shown in Fig. 2, Fig. 3 a and Fig. 3 b, U.S. Patent Publication No. is that US7889830B2 discloses a kind of peace dispensing device, this peace dispensing device has guiding device 50`, this guiding device 50` is the shallow slot structure with groove 51`, in the position to direct safety injection ozzle 40` just, be processed with guiding safety injection water and change nyctitropic cambered structure 52`, in the time that safety injection water level is at a high speed injected in this guiding device 50`, under the guide functions of cambered structure 52`, the flow direction of safety injection water changes, and flows downward; This guiding device is owing to being installed on hanging basket 20`, be subject to hanging basket 20` thickness limits, its radius of the radian is very little, thereby it is too violent that safety injection water is turned, can not flow downward by fine Ordering safety injection water, when safety injection water is flowed downward, produce concuss, anti-by-pass flow is poor; Because its guiding device is welded on hanging basket 20`, give follow-up hanging basket 20` installation process and bring certain technical barrier with the mating operation of direct safety injection ozzle 10` simultaneously.
As shown in Figure 4, U.S. Patent Publication No. is that US7983377B2 discloses a kind of peace dispensing device, the guiding device of the disclosed peace dispensing device of this patent for installing water conservancy diversion conduit 21` on hanging basket 20`, the just opening to water conservancy diversion conduit 21` of direct safety injection ozzle 40`, on the one hand, in the time that peace note process occurs, initial flow and the impulsive force of safety injection water are larger, and the radius of turn of safety injection water in water conservancy diversion conduit 21` is less, make the safety injection water can not be completely along orderly the flowing downward of water conservancy diversion conduit 21`, when being flowed downward, safety injection water produces concuss, anti-by-pass flow is poor, on the other hand, owing to not establishing transition structure between peace note ozzle 40` and pressure vessel 10`, in peace note process, make the weld thermal stress between direct safety injection ozzle 40` and pressure vessel 10` larger, reduced greatly the serviceable life of peace note ozzle.
Therefore, need a kind of anti-side stream type direct safety injection conducting element with good water conservancy diversion, guided bone and anti-by-pass flow badly.
Summary of the invention
The object of the present invention is to provide a kind of anti-side stream type direct safety injection conducting element with good water conservancy diversion, guided bone and anti-by-pass flow.
Another object of the present invention is to provide a kind of direct safety injection device with anti-side stream type direct safety injection conducting element, described anti-side stream type direct safety injection conducting element has good water conservancy diversion, guided bone and anti-by-pass flow.
For achieving the above object, the invention provides a kind of anti-side stream type direct safety injection conducting element, described anti-side stream type direct safety injection conducting element is suitable for docking with the outlet of direct safety injection ozzle and then safety injection water being carried out to water conservancy diversion, wherein, described anti-side stream type direct safety injection conducting element comprises the diversion tube that is hollow and bends down, described diversion tube have influent stream mouth and down go out head piece, described influent stream mouth docks and is communicated with the outlet of described direct safety injection ozzle, described go out head piece be flat-shaped structure, and described influent stream mouth to described in go out head piece bore progressively increase.
Preferably, described diversion tube is flat-shaped structure.
Preferably, described anti-side stream type direct safety injection conducting element also comprises thermal sleeve, and described thermal sleeve inserts in described direct safety injection ozzle and with the influent stream mouth docking of described diversion tube and is fixedly communicated with.Can alleviate greatly the thermal shock effect bringing due to the huge temperature difference between safety injection water and Core cooling water by described thermal sleeve, thereby reduce the risk of metallic conduit and pressure vessel surrender and fracture.
A kind of direct safety injection device provided by the invention, comprise direct safety injection ozzle and anti-side stream type direct safety injection conducting element, described anti-side stream type direct safety injection conducting element docks with the outlet of described direct safety injection ozzle and then safety injection water is carried out to water conservancy diversion, wherein, described anti-side stream type direct safety injection conducting element comprises the diversion tube that is hollow and bends down, described diversion tube have influent stream mouth and down go out head piece, described influent stream mouth docks and is communicated with the outlet of described direct safety injection ozzle, described go out head piece be flat-shaped structure, and described influent stream mouth to described in go out head piece bore progressively increase.
Compared with prior art, because the influent stream mouth of the diversion tube of the anti-side stream type direct safety injection of the present invention conducting element docks and is communicated with the outlet of direct safety injection ozzle, thereby make mozzle physical efficiency utilization peace note ozzle of the present invention and the pressure vessel inner side support as welded and installed, thereby do not need specialized designs soldering mounting structure, do not need to change exterior tubing yet, therefore without increasing any extra mounting structure that is used for carrying out the anti-side stream type direct safety injection of firm the present invention conducting element, be that the present invention can carry out stable being fixedly connected with by the structure of himself with pressure vessel, also be convenient to hanging basket to the assembling in pressure vessel simultaneously, due to diversion tube of the present invention be hollow and down bending structural design, the structural design of bending has increased the radius of turn of diversion tube greatly, thereby more orderly and steady when safety injection water is flowed out downwards, solve while flowing downward because of safety injection water in prior art and produced the poor technical matters of anti-by-pass flow that concuss brings, improved greatly anti-by-pass flow of the present invention, separately, be flat-shaped structure owing to going out head piece described in diversion tube of the present invention, and described influent stream mouth to described in go out head piece bore progressively increase, when safety injection water is flowed in diversion tube, mozzle physical efficiency is carried out good water conservancy diversion and guiding function to the flow direction of safety injection water, anti-side stream type direct safety injection conducting element water conservancy diversion of the present invention and guided bone are improved, safety injection water is being carried out under the effect of water conservancy diversion simultaneously, the width of current broadens gradually, and safety injection water from be flat-shaped structure go out head piece flow out time, also form the safety injection water that the downward height of sheet (that is: flat-shaped) hastens mobile, this sheet safety injection water paste at a relatively high speed hanging basket and flow downward, thereby minimizing contacts with pressure vessel, form better the flowing downward of decline ring cavity shape that adapt to, and further reduce by-pass flow.
Brief description of the drawings
Fig. 1 is existing a kind of peace dispensing device structural representation.
Fig. 2 is existing another kind of peace dispensing device structural representation.
Fig. 3 a is the structural representation of guiding device in Fig. 2.
Fig. 3 b is the structural representation at another visual angle of guiding device in Fig. 2.
Fig. 4 is the structural representation of existing another guiding device.
Fig. 5 is the structural representation that the present invention's anti-side stream type direct safety injection conducting element and direct safety injection device are installed.
Fig. 6 is that direct safety injection device of the present invention is connected in the easy structure schematic diagram on pressure vessel.
Fig. 7 a is the cross-sectional schematic of Fig. 6.
Fig. 7 b is another angle cross-sectional schematic of Fig. 6.
Fig. 8 is the direct safety injection device shown in Fig. 6 and hanging basket and pressure vessel assembly structure schematic diagram.
Fig. 9 a is the cross-sectional schematic of the anti-side stream type direct safety injection of the present invention conducting element.
Fig. 9 b is another angle cross-sectional schematic of the anti-side stream type direct safety injection of the present invention conducting element.
Figure 10 is the thermal sleeve structural representation of direct safety injection device of the present invention.
Figure 11 a is that the direct safety injection device with thermal sleeve is connected in the easy structure schematic diagram on pressure vessel.
Figure 11 b is another angle cross-sectional schematic of Figure 11 a.
Figure 12 is the direct safety injection device shown in Figure 10 and hanging basket and pressure vessel assembly structure schematic diagram.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, in accompanying drawing, similarly element numbers represents similar element.
As Fig. 5-Fig. 9 b shows, direct safety injection device 100 of the present invention comprises direct safety injection ozzle 40 and anti-side stream type direct safety injection conducting element 50, described anti-side stream type direct safety injection conducting element 50 docks and then safety injection water is carried out to water conservancy diversion with the outlet 41 of described direct safety injection ozzle 40, wherein, described anti-side stream type direct safety injection conducting element 50 comprises the diversion tube 51 that is hollow and bends down, described diversion tube have influent stream mouth 52 and down go out head piece 53, described influent stream mouth 52 docks and is communicated with the outlet 41 of described direct safety injection ozzle 40, described go out head piece 53 be flat-shaped structure, and described influent stream mouth 52 to described go out the bore of head piece 53 progressively increase.Particularly, diversion tube 51 of the present invention can utilize the support of direct safety injection ozzle 40 and pressure vessel inner side as welded and installed, thereby directly the influent stream mouth of diversion tube 51 52 and outlet 41 jam welding of direct safety injection ozzle 40 are led in succession and are fixed on the madial wall of pressure vessel 10, simultaneously owing to being formed with the ring cavity 30 of ring-type between pressure vessel 10 and hanging basket 20, going out the safety injection water that head piece 53 flows out and can flow into stably in the ring cavity 30 of decline by direct safety injection device 100 of the present invention and anti-side stream type direct safety injection conducting element 50.
Continue in conjunction with shown in Fig. 6-Fig. 9 b, diversion tube 51 of the present invention can utilize the support of direct safety injection ozzle 40 and pressure vessel inner side as welded and installed, thereby do not need specialized designs soldering mounting structure, do not need to change exterior tubing yet, therefore without increasing any extra mounting structure that is used for carrying out the anti-side stream type direct safety injection of firm the present invention conducting element 50, be also convenient to hanging basket 20 simultaneously to the assembling in pressure vessel 10, the structural design that diversion tube 51 of the present invention is hollow and bends down, the structural design of bending has increased the radius of turn of diversion tube 51 greatly, thereby when being flowed out, safety injection water more in order with steady, improves greatly anti-by-pass flow of the present invention downwards, described in diversion tube 51 of the present invention, go out head piece 53 and be flat-shaped structure, and described influent stream mouth 52 to described go out the bore of head piece 53 progressively increase, when safety injection water is flowed in diversion tube 51, diversion tube 51 can carry out good water conservancy diversion and guiding function to the flow direction of safety injection water, water conservancy diversion and the guided bone of anti-side stream type direct safety injection conducting element 50 of the present invention are improved, simultaneously safety injection water is when being the going out head piece 53 and flow out of flat-shaped structure, also form the safety injection water that the downward height of sheet (that is: flat-shaped) hastens mobile, this sheet safety injection water paste at a relatively high speed hanging basket 20 and flow downward, thereby minimizing contacts with pressure vessel 10, formation better adapts to flowing downward to the ring cavity 30 of ring-type, and further reduce by-pass flow.
Continue as shown in Figure 10-Figure 12, direct safety injection device 100 of the present invention comprises direct safety injection ozzle 40 and anti-side stream type direct safety injection conducting element 50, described anti-side stream type direct safety injection conducting element 50 docks and then safety injection water is carried out to water conservancy diversion with the outlet 41 of described direct safety injection ozzle 40, wherein, described anti-side stream type direct safety injection conducting element 50 comprises the diversion tube 51 and the thermal sleeve 60 that are hollow and bending down, described diversion tube have influent stream mouth 52 and down go out head piece 53, described influent stream mouth 52 docks and is communicated with the outlet 41 of described direct safety injection ozzle 40, described go out head piece 53 be flat-shaped structure, and described influent stream mouth 52 to described go out the bore of head piece 53 progressively increase.Described thermal sleeve 60 inserts in described direct safety injection ozzle 40 and with influent stream mouth 52 docking of described diversion tube 51 and is fixedly communicated with; Particularly, diversion tube 51 of the present invention can utilize the support of direct safety injection ozzle 40 and pressure vessel inner side as welded and installed, thereby directly the influent stream mouth of diversion tube 51 52 and outlet 41 jam welding of direct safety injection ozzle 40 are led in succession and are fixed on the madial wall of pressure vessel 10, simultaneously owing to being formed with the ring cavity 30 of ring-type between pressure vessel 10 and hanging basket 20, going out the safety injection water that head piece 53 flows out and can flow into stably in the ring cavity 30 of decline by direct safety injection device 100 of the present invention and anti-side stream type direct safety injection conducting element 50.Simultaneously, direct safety injection device 100 of the present invention and anti-side stream type direct safety injection conducting element 50 can be alleviated the thermal shock effect bringing due to the huge temperature difference between safety injection water and Core cooling water greatly by described thermal sleeve 60, thereby reduce the risk of metallic conduit and pressure vessel surrender and fracture.
Shown in Fig. 9 a and Fig. 9 b, preferably, described diversion tube 51 is flat-shaped structure, make the inside of diversion tube 51 form flat-shaped hollow structure, flow into the safety injection water shape in the form of sheets in diversion tube 51, when thereby safety injection water flows out from going out head piece 53, also form the steady and stable safety injection water that the downward height of sheet (that is: flat-shaped) hastens to flow, when being flowed out, safety injection water more in order with steady, further improves anti-by-pass flow effect of the present invention downwards.
Shown in Fig. 6-Figure 12, the influent stream mouth 52 of diversion tube 51 and the outlet 41 of direct safety injection ozzle 40 of the anti-side stream type direct safety injection of the present invention conducting element 50 and direct safety injection device 100 are docked and are communicated with, thereby make diversion tube 51 of the present invention can utilize the support of direct safety injection ozzle 40 and pressure vessel inner side as welded and installed, thereby do not need specialized designs soldering mounting structure, do not need to change exterior tubing yet, therefore without increasing any extra mounting structure that is used for carrying out the anti-side stream type direct safety injection of firm the present invention conducting element 50, be that the present invention can carry out stable being fixedly connected with by the structure of himself with pressure vessel 10, also be convenient to hanging basket 20 to the assembling in pressure vessel 10 simultaneously, due to diversion tube 51 of the present invention be hollow and down bending structural design, the structural design of bending has increased the radius of turn of diversion tube 51 greatly, thereby more orderly and steady when safety injection water is flowed out downwards, solve while flowing downward because of safety injection water in prior art and produced the poor technical matters of anti-by-pass flow that concuss brings, improved greatly anti-by-pass flow of the present invention, separately, be flat-shaped structure owing to going out head piece 53 described in diversion tube 51 of the present invention, and described influent stream mouth 52 to described go out the bore of head piece 53 progressively increase, when safety injection water is flowed in diversion tube 51, diversion tube 51 can carry out good water conservancy diversion and guiding function to the flow direction of safety injection water, water conservancy diversion and the guided bone of anti-side stream type direct safety injection conducting element 50 of the present invention are improved, safety injection water is being carried out under the effect of water conservancy diversion simultaneously, the width of current broadens gradually, and safety injection water is when being the going out head piece 53 and flow out of flat-shaped structure, also form the safety injection water that the downward height of sheet (that is: flat-shaped) hastens mobile, this sheet safety injection water paste at a relatively high speed hanging basket 20 and flow downward, thereby minimizing contacts with pressure vessel 10, formation better adapts to flowing downward to the ring cavity 30 of ring-type, and further reduce by-pass flow.
Separately, concrete structure and the principle of work of pressure vessel 10, hanging basket 20 and direct safety injection ozzle 40 involved in the present invention, be well known to those of ordinary skill in the art, is no longer described in detail at this.
Above disclosed is only the preferred embodiments of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the present patent application the scope of the claims, still belongs to the scope that the present invention is contained.
Claims (4)
1. an anti-side stream type direct safety injection conducting element, be suitable for docking with the outlet of direct safety injection ozzle and then safety injection water being carried out to water conservancy diversion, it is characterized in that: described anti-side stream type direct safety injection conducting element comprises the diversion tube that is hollow and bends down, described diversion tube have influent stream mouth and down go out head piece, described influent stream mouth docks and is communicated with the outlet of described direct safety injection ozzle, described go out head piece be flat-shaped structure, and described influent stream mouth to described in go out head piece bore progressively increase.
2. anti-side stream type direct safety injection conducting element as claimed in claim 1, is characterized in that: described diversion tube is flat-shaped structure.
3. anti-side stream type direct safety injection conducting element as claimed in claim 1, is characterized in that: also comprise thermal sleeve, described thermal sleeve inserts in described direct safety injection ozzle and with the influent stream mouth docking of described diversion tube and is fixedly communicated with.
4. a direct safety injection device, comprise direct safety injection ozzle and anti-side stream type direct safety injection conducting element, described anti-side stream type direct safety injection conducting element docks with the outlet of described direct safety injection ozzle and then safety injection water is carried out to water conservancy diversion, it is characterized in that: described anti-side stream type direct safety injection conducting element is as described in claim 1-3 any one.
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| CN201410215636.8A CN104008781B (en) | 2014-05-21 | 2014-05-21 | Anti-side stream type direct safety injection conducting element and direct safety injection device |
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| CN201410215636.8A CN104008781B (en) | 2014-05-21 | 2014-05-21 | Anti-side stream type direct safety injection conducting element and direct safety injection device |
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| CN104008781A true CN104008781A (en) | 2014-08-27 |
| CN104008781B CN104008781B (en) | 2017-01-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109887622A (en) * | 2019-03-06 | 2019-06-14 | 中广核研究院有限公司 | A kind of reactor and the flow passage structure for reactor |
| CN110544543A (en) * | 2019-09-12 | 2019-12-06 | 国家电投集团科学技术研究院有限公司 | safety water protection device and reactor with same |
| CN114664464A (en) * | 2022-02-28 | 2022-06-24 | 深圳中广核工程设计有限公司 | Guiding device for reactor and reactor |
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| CN109887622A (en) * | 2019-03-06 | 2019-06-14 | 中广核研究院有限公司 | A kind of reactor and the flow passage structure for reactor |
| CN110544543A (en) * | 2019-09-12 | 2019-12-06 | 国家电投集团科学技术研究院有限公司 | safety water protection device and reactor with same |
| CN114664464A (en) * | 2022-02-28 | 2022-06-24 | 深圳中广核工程设计有限公司 | Guiding device for reactor and reactor |
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| CN104008781B (en) | 2017-01-04 |
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Address after: 518000 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Applicant after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Applicant after: China General Nuclear Power Corporation Address before: 518000 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Applicant before: Zhongkehua Nuclear Power Technology Institute Co., Ltd. Applicant before: China General Nuclear Power Corporation |
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