CN103307320A - Passive one-way isolating valve, pipeline and pebble-bed high-temperature gas cooled reactor - Google Patents
Passive one-way isolating valve, pipeline and pebble-bed high-temperature gas cooled reactor Download PDFInfo
- Publication number
- CN103307320A CN103307320A CN2013102417753A CN201310241775A CN103307320A CN 103307320 A CN103307320 A CN 103307320A CN 2013102417753 A CN2013102417753 A CN 2013102417753A CN 201310241775 A CN201310241775 A CN 201310241775A CN 103307320 A CN103307320 A CN 103307320A
- Authority
- CN
- China
- Prior art keywords
- valve
- unidirectional separating
- separating valve
- valve body
- unidirectional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
Landscapes
- Taps Or Cocks (AREA)
Abstract
The invention discloses a passive one-way isolating valve which comprises a one-way isolating valve lower valve body, a one-way isolating valve upper valve body and a one-way isolating valve ball, wherein the one-way isolating valve ball is placed on a valve ball bearing seat; the valve ball bearing seat is fixedly connected with the one-way isolating valve lower valve body; the one-way isolating valve lower valve body and the one-way isolating valve upper valve body are in bolt connection or stud connection; and the one-way isolating valve lower valve body and the one-way isolating valve upper valve body are fixedly connected with a pipeline respectively. The invention further discloses the pipeline comprising the passive one-way isolating valve and a pebble-bed high-temperature gas cooled reactor comprising the pipeline. The passive one-way isolating valve can relieve positive reactivity accidents caused by pipeline fracture, so that time is provided for treating the accidents, the passive one-way isolating valve is simple and practicable, and the service life is relative longer.
Description
Technical field
The present invention relates to nuclear power plant reactor engineering and safety technique field, relate in particular to a kind of non-active unidirectional separating valve, pipeline and pebble bed high temperature reactor.
Background technique
Nuclear energy is as a kind of low-carbon energy, at environmental protection, CO
2Reduction of discharging and sustainable development aspect are significant.But after in March, 2011 Fukushima, Japan generation seismic sea wave caused nuclear power plant accident, the nuclear safety technology of higher standard was subject to examining industry engineer and expert's attention.
Pebble bed high temperature reactor is because the non-security feature such as actively set out of its inherent safety, decay heat causes nuclear specialty colleague researcher's concern.Institute of Nuclear and New Energy Technology, Tsing University is on the technical foundation of the high temperature gas-cooled experimental reactor of 10MW, and having designed and developed can the commercial ball bed modular high temperature air cooling demonstration reactor of using.Pebble bed high temperature reactor adopts control rod and KLAK system two cover reactor shut-off systems.
In pebble bed high temperature reactor, KLAK system is realized cold shut and power regulation functions by the neutron absorption ball that contains boron carbide.When the needs shutdown, the absorption ball that is positioned at pressurized container top ball-storing tank reaches the shutdown function by gravity fall to the reactor core of lateral reflection layer.When opening heap, by pneumatic conveying mode the absorption ball in the reactor core is returned in the ball-storing tank, realize power regulation functions.Strength is sent the absorption ball back to has malleation to blow and the vacuum pressure conveying dual mode.When the negative-pressure pneumatic suction send mode to return serve, inhale the 1 grade of pipeline fracture of safety that send if outside pressurized container, carry out helium, quick decompression in the single-phase helium conveyance conduit then, may cause the absorption ball in the lateral reflection layer reactor core falling sphere duct sucked back to heap top ball-storing tank interior (or accidents happened by the air-flow band to cause absorbing ball) rapidly, thereby will introduce the positive reactivity accident.
Summary of the invention
The technical problem that (one) will solve
Technical problem to be solved by this invention is: a kind of non-active unidirectional separating valve is provided, to overcome prior art owing to causing the technical problem of accident during the outer pipeline fracture of pressurized container.
(2) technological scheme
In order to solve above-mentioned technical problem, on the one hand, the invention provides a kind of non-active unidirectional separating valve, comprise valve body under the unidirectional separating valve, unidirectional separating valve upper valve body and unidirectional separating valve valve ball, described unidirectional separating valve valve ball is placed on the valve ball supporting base, and described valve ball supporting base is fixedly connected with valve body under the described unidirectional separating valve; Under the described unidirectional separating valve valve body be connected that unidirectional separating valve upper valve body bolt connects or stud connects.
Preferably, the contact surface of valve body and described unidirectional separating valve upper valve body is the concaveconvex structure that is complementary under the described unidirectional separating valve.
Preferably, the internal surface of described unidirectional separating valve upper valve body is sphere; The outer surface of described sphere and described unidirectional separating valve valve ball is complementary.
Preferably, between valve body and the described unidirectional separating valve upper valve body O type circle or gasket seal are installed under the described unidirectional separating valve.
Preferably, described valve ball supporting base is more than 3.
Preferably, described ducted gas flow rate depend on the material of described unidirectional separating valve valve ball and size, outer surface and the described unidirectional separating valve upper valve body internal surface matching degree of valve body and the inner aperture of described unidirectional separating valve upper valve body and unidirectional separating valve valve ball under the described unidirectional separating valve.
On the other hand, the present invention also provides a kind of pipeline, comprises non-active unidirectional separating valve described above, and valve body is fixedly connected with pipeline respectively with described unidirectional separating valve upper valve body under the described unidirectional separating valve.
Preferably, described being fixedly connected as is welded to connect.
Preferably, the described flange that is fixedly connected as connects; Valve body and described unidirectional separating valve upper valve body are sandwiched between stainless steel lower flange and the stainless steel upper flange under the described unidirectional separating valve; Between the valve body O type circle or gasket seal are installed under described stainless steel lower flange and the described unidirectional separating valve; Between described stainless steel upper flange and the described unidirectional separating valve upper valve body O type circle or gasket seal are installed.
On the other hand, the invention provides a kind of pebble bed high temperature reactor, comprise pipeline described above, described pipeline is the part that ball-storing tank exports to the pipeline between the pressurized container.
(3) beneficial effect
A kind of non-active unidirectional separating valve provided by the present invention has following advantage:
One, the pipeline that exports between the pressurized container at the ball-storing tank of pebble bed high temperature reactor adsorber reactor shut-off system is installed non-active unidirectional separating valve, play the through-flow function of gas under the low flow velocity and the gas stagnation effect under the high flow rate, can alleviate because the positive reactivity accident that disconnected pipe may be introduced, thereby provide the time for the processing accident; Two, can realize unidirectional isolation airflow function in the high temperature and high pressure gas flow process; Three, can play without pump and the non-active buffer action during without any mechanical moving element, because the machinery-free moving element, its working life is relatively long; Four, non-active unidirectional separating valve delicate structure can directly be installed on the gas transmission pipeline, does not need the structures such as bearing support, and is simple; Five, can design the unidirectional separating valve valve ball of different densities and different sizes, thus the different air-flow velocity requirement when reaching isolation.
Description of drawings
Fig. 1 is non-active unidirectional separating valve overall structure figure of the present invention;
Fig. 2 is non-active unidirectional separating valve plan view of the present invention;
Fig. 3 is the graphics of valve body under the unidirectional separating valve of the present invention;
Fig. 4 is the graphics of unidirectional separating valve upper valve body of the present invention;
Fig. 5 is the embodiment of the invention two pipeline configuration figure;
Fig. 6 is the embodiment of the invention three pipeline configuration figure.
Among the above figure: the 1-pipeline; Valve body under the unidirectional separating valve of 2-; The unidirectional separating valve upper valve body of 3-; The unidirectional separating valve valve ball of 4-; 5-stainless steel lower flange; 6-stainless steel upper flange; 7-valve ball supporting base.
Embodiment
Below in conjunction with Figure of description and embodiment, the specific embodiment of the present invention is described in further detail.Following examples only are used for explanation the present invention, but are not used for limiting the scope of the invention.
Embodiment one:
As illustrated in fig. 1 and 2, the present embodiment has been put down in writing a kind of non-active unidirectional separating valve, comprises valve body 2 under the unidirectional separating valve, unidirectional separating valve upper valve body 3 and unidirectional separating valve valve ball 4.
Unidirectional separating valve valve ball 4 is placed on the valve ball supporting base 7, and valve body 2 is welded to connect under valve ball supporting base 7 and the unidirectional separating valve; Under the unidirectional separating valve valve body 2 be connected that separating valve upper valve body 3 bolts connect or stud connects.
As shown in Figure 3 and Figure 4, valve body 2 adopts the concaveconvex structure mode to be connected contact with the contact surface of unidirectional separating valve upper valve body 3 under the unidirectional separating valve.The upper surface of valve body 2 is inlaid with sealing O type circle or gasket seal under the unidirectional separating valve, to prevent Leakage Gas.Valve ball supporting base 7 is connected with valve body 2 employing welding manners under the unidirectional separating valve, and the valve ball supporting base is more than 3.
Wherein, the internal surface of unidirectional separating valve upper valve body 3 is processed into the sphere form, and its sphere has good sphericity and smoothness, can be complementary with the outer surface of unidirectional separating valve valve ball 4.
Embodiment two:
As shown in Figure 5, the present embodiment has been put down in writing a kind of pipeline, comprises non-active unidirectional separating valve described above, and valve body 2 and unidirectional separating valve upper valve body 3 are welded to connect with pipeline 1 respectively under the unidirectional separating valve.
Wherein, gas flow rate in the pipeline 1 depends on the material of unidirectional separating valve valve ball and size, valve body 2 and unidirectional separating valve upper valve body 3 inner apertures under the unidirectional separating valve, and the outer surface of unidirectional separating valve valve ball 4 and described unidirectional separating valve upper valve body 3 internal surface matching degrees.
Embodiment three:
As shown in Figure 6, the present embodiment has been put down in writing a kind of pipeline, and its structure and embodiment's two structure is basic identical, and difference only is: under the unidirectional separating valve valve body 2 be connected separating valve upper valve body 3 and be connected with pipeline 1 flange respectively.
Wherein, valve body 2 and unidirectional separating valve upper valve body 3 can be sandwiched between stainless steel lower flange 5 and the stainless steel upper flange 6 under the unidirectional separating valve.Under this kind operating mode, between the valve body 2 pad can be arranged under stainless steel lower flange 5 and the unidirectional separating valve, or gasket seal, between same stainless steel upper flange 6 and the unidirectional separating valve upper valve body 3 pad can be arranged, or gasket seal, to prevent Leakage Gas.
Embodiment four:
The present embodiment has been put down in writing a kind of pebble bed high temperature reactor, comprises pipeline described above, and described pipeline is the part that ball-storing tank exports to the pipeline between the pressurized container.
The working procedure of non-active unidirectional separating valve provided by the present invention is as follows:
The gas flow rates different according to when isolation requires (relevant with gas density, external pressure), design the inside pore size (the inner pore size of valve inner pore size and unidirectional separating valve upper valve body under the unidirectional separating valve) in suitable unidirectional separating valve valve ball (comprising valve ball material and valve ball size) and duct, valve ball place, and the cooperate degree of the Excircle machining precision of unidirectional separating valve valve ball and unidirectional separating valve upper valve body bore area machining accuracy.
During gas flow rate when the gas access flow velocity is isolated less than needs, unidirectional separating valve valve ball is along with the suction port of gas before the valve flows into, this moment is because the Action of Gravity Field of unidirectional separating valve valve ball is larger, in the highest flight, do not move upward so unidirectional separating valve valve ball can not blown by air-flow, can not contact applying with unidirectional separating valve upper valve body bore area yet.Gas still can flow by unidirectional separating valve, but owing to gas flow area in the unidirectional separating valve structure reduces, so when gas flow was crossed unidirectional separating valve, in view of existing flow resistance, gas flow rate can correspondingly reduce to some extent.Subsequently, the gas that reduces of flowing velocity flows out from stainless steel exports pipeline.
During gas flow rate when the gas access flow velocity is isolated greater than needs, unidirectional separating valve valve ball meeting is owing to the frictional force of lift, inflow gas and the unidirectional separating valve valve ball of gas flow and the comprehensive function of unidirectional separating valve valve ball self gravitation, and unidirectional separating valve valve ball can at first blown under given gas flow rate condition and rotate; When air current flow speed further increased, unidirectional separating valve valve ball can be blown to state of suspension; When air current flow speed continues to increase to certain critical value, unidirectional separating valve valve ball will break away from the separating valve supporting base, continue up motion, and fluoran stream surface and the lee side pressure reduction of unidirectional separating valve valve ball increase gradually thereupon; The tight combination of bore area that the pressure reduction that increases impels unidirectional separating valve valve ball finally to move to unidirectional separating valve valve ball outer surface and unidirectional separating valve upper valve body is pressed close to, thereby stops up gas flow channel, plays the separation gas effect.
The exposure level size of the sphericity of the effect of non-active unidirectional separating valve separation gas and unidirectional separating valve valve ball, surface flatness and unidirectional separating valve valve ball and unidirectional separating valve upper valve body bore area has much relations.
Owing to only under accident conditions, just can cause the gas flow rates in the stainless steel inlet pipe constantly to increase; And after getting rid of accident cause when taking measures, pressure in stainless steel inlet pipe and the stainless steel outlet conduit almost reaches consistent, unidirectional separating valve valve ball will fall gradually owing to Action of Gravity Field, the flow area of unidirectional separating valve valve ball surrounding space increases gradually, and then be beneficial to reducing of unidirectional separating valve valve ball fluoran stream surface and lee side pressure reduction, last unidirectional separating valve valve ball falls after rise and rests on the separating valve supporting base, and stainless steel inlet pipe and the smooth and easy of the interior gas of stainless steel outlet conduit flow under the realization nominal situation.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (10)
1. non-active unidirectional separating valve, it is characterized in that, comprise valve body under the unidirectional separating valve, unidirectional separating valve upper valve body and unidirectional separating valve valve ball, described unidirectional separating valve valve ball is placed on the valve ball supporting base, described valve ball supporting base is fixedly connected with valve body under the described unidirectional separating valve, under the described unidirectional separating valve valve body be connected that unidirectional separating valve upper valve body bolt connects or stud connects.
2. non-active unidirectional separating valve according to claim 1 is characterized in that, the contact surface of valve body and described unidirectional separating valve upper valve body is the concaveconvex structure that is complementary under the described unidirectional separating valve.
3. non-active unidirectional separating valve according to claim 1 is characterized in that, the internal surface of described unidirectional separating valve upper valve body is sphere; The outer surface of described sphere and described unidirectional separating valve valve ball is complementary.
4. non-active unidirectional separating valve according to claim 1 is characterized in that, between valve body and the described unidirectional separating valve upper valve body O type circle or gasket seal is installed under the described unidirectional separating valve.
5. non-active unidirectional separating valve according to claim 1 is characterized in that, described valve ball supporting base is more than 3.
6. each described non-active unidirectional separating valve according to claim 1～5, it is characterized in that, described ducted gas flow rate depends on the material of described unidirectional separating valve valve ball and size, outer surface and the described unidirectional separating valve upper valve body internal surface matching degree of valve body and the inner aperture of described unidirectional separating valve upper valve body and unidirectional separating valve valve ball under the described unidirectional separating valve.
7. a pipeline is characterized in that, comprises each described non-active unidirectional separating valve of claim 1～6, and valve body is fixedly connected with pipeline respectively with described unidirectional separating valve upper valve body under the described unidirectional separating valve.
8. pipeline according to claim 7 is characterized in that, described being fixedly connected as is welded to connect.
9. pipeline according to claim 7 is characterized in that, the described flange that is fixedly connected as connects; Valve body and described unidirectional separating valve upper valve body are sandwiched between stainless steel lower flange and the stainless steel upper flange under the described unidirectional separating valve; Between the valve body O type circle or gasket seal are installed under described stainless steel lower flange and the described unidirectional separating valve; Between described stainless steel upper flange and the described unidirectional separating valve upper valve body O type circle or gasket seal are installed.
10. a pebble bed high temperature reactor is characterized in that, comprises each described pipeline of claim 7～9, and described pipeline is the part that ball-storing tank exports to the pipeline between the pressurized container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310241775.3A CN103307320B (en) | 2013-06-18 | 2013-06-18 | A kind of non-active unidirectional segregaion valve, pipeline and pebble bed high temperature reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310241775.3A CN103307320B (en) | 2013-06-18 | 2013-06-18 | A kind of non-active unidirectional segregaion valve, pipeline and pebble bed high temperature reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103307320A true CN103307320A (en) | 2013-09-18 |
| CN103307320B CN103307320B (en) | 2016-06-15 |
Family
ID=49132861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310241775.3A Active CN103307320B (en) | 2013-06-18 | 2013-06-18 | A kind of non-active unidirectional segregaion valve, pipeline and pebble bed high temperature reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103307320B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104992731A (en) * | 2015-07-13 | 2015-10-21 | 清华大学 | Baffle structure of high-temperature gas-cooled reactor primary-helium fan with active and passive characteristics |
| US10943704B2 (en) | 2015-07-13 | 2021-03-09 | Tsinghua University | Baffle structure for channel |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210248U (en) * | 1987-07-16 | 1988-07-27 | 李成喜 | Spherical shape back stop valve |
| US5232014A (en) * | 1991-03-18 | 1993-08-03 | Georg Fischer Ag | Check valve |
| CN2145297Y (en) * | 1992-08-10 | 1993-11-03 | 黄宗文 | Efficiente one-way valve cabable for arbitrary putting |
| CN2260930Y (en) * | 1996-04-19 | 1997-08-27 | 王有新 | Automatic non-return valve |
| CN2619114Y (en) * | 2003-01-07 | 2004-06-02 | 董子龙 | Anti-overflow water valve for house |
| JP2008223997A (en) * | 2007-03-15 | 2008-09-25 | Asahi Organic Chem Ind Co Ltd | Ball check valve |
| US20120048401A1 (en) * | 2009-03-31 | 2012-03-01 | Seiji Yamashita | Ball check valve |
| CN202852084U (en) * | 2012-09-29 | 2013-04-03 | 浙江佰通防腐设备有限公司 | Ball check valve |
-
2013
- 2013-06-18 CN CN201310241775.3A patent/CN103307320B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210248U (en) * | 1987-07-16 | 1988-07-27 | 李成喜 | Spherical shape back stop valve |
| US5232014A (en) * | 1991-03-18 | 1993-08-03 | Georg Fischer Ag | Check valve |
| CN2145297Y (en) * | 1992-08-10 | 1993-11-03 | 黄宗文 | Efficiente one-way valve cabable for arbitrary putting |
| CN2260930Y (en) * | 1996-04-19 | 1997-08-27 | 王有新 | Automatic non-return valve |
| CN2619114Y (en) * | 2003-01-07 | 2004-06-02 | 董子龙 | Anti-overflow water valve for house |
| JP2008223997A (en) * | 2007-03-15 | 2008-09-25 | Asahi Organic Chem Ind Co Ltd | Ball check valve |
| US20120048401A1 (en) * | 2009-03-31 | 2012-03-01 | Seiji Yamashita | Ball check valve |
| CN202852084U (en) * | 2012-09-29 | 2013-04-03 | 浙江佰通防腐设备有限公司 | Ball check valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104992731A (en) * | 2015-07-13 | 2015-10-21 | 清华大学 | Baffle structure of high-temperature gas-cooled reactor primary-helium fan with active and passive characteristics |
| US10943704B2 (en) | 2015-07-13 | 2021-03-09 | Tsinghua University | Baffle structure for channel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103307320B (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102750993B (en) | There is the passive containment accidental depressurization system of gas entrapments function of releasing | |
| WO2014048293A1 (en) | Combined active and passive containment vessel heat removal apparatus | |
| CN103065696A (en) | Spent fuel dry-type storage device | |
| CN101853708B (en) | Spherical material buffer conveyor device | |
| CN102208217B (en) | Sealing structure for maintenance of helium circulator of high temperature gas-cooled reactor | |
| CN104103325B (en) | Heat derivation system for long-term passive containment | |
| CN103137222B (en) | Self-starting gas discharging device with long-term water sealing function | |
| CN103307320A (en) | Passive one-way isolating valve, pipeline and pebble-bed high-temperature gas cooled reactor | |
| US10354770B2 (en) | Residual heat removal ventilation system for spent fuel dry storage facility of nuclear power plant | |
| CN1447342A (en) | Second shutdown system of absorption ball applicable to gas-cooled reactor | |
| CN102262907B (en) | High temperature gas cooled reactor absorption ball pneumatic conveying feeder and conveying system | |
| CN102435414A (en) | Method of decompression test of air entrainment and cavitation alleviation model | |
| CN101777397B (en) | Reactor core ball feeding device of high temperature gas cooled reactor | |
| CN102768866A (en) | Container negative pressure exhaust system | |
| CN105590659A (en) | Residual heat removal ventilation system for dry storage of spent fuel in nuclear power station | |
| CN104992731B (en) | Baffle structure of high-temperature gas-cooled reactor primary-helium fan with active and passive characteristics | |
| CN207624391U (en) | A kind of constrain system and the shared heat derivation device of residual heat removal system | |
| CN208503523U (en) | Heavy-caliber high-temperature liquid metal sodium valves | |
| CN112466484B (en) | Passive containment cooling system | |
| CN101893110A (en) | Top entry inclined pneumatic ball valve | |
| CN201407383Y (en) | Uploading oblique ball type pneumatic ball valve | |
| CN209875290U (en) | Novel expansion tank | |
| CN204677801U (en) | A kind of eccentric ball valve structure | |
| CN202350973U (en) | Pressure gauge seat capable of automatically preventing leakage | |
| US10943704B2 (en) | Baffle structure for channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |