CN106297913B - Sealing structure capable of being automatically opened - Google Patents
Sealing structure capable of being automatically opened Download PDFInfo
- Publication number
- CN106297913B CN106297913B CN201610915311.XA CN201610915311A CN106297913B CN 106297913 B CN106297913 B CN 106297913B CN 201610915311 A CN201610915311 A CN 201610915311A CN 106297913 B CN106297913 B CN 106297913B
- Authority
- CN
- China
- Prior art keywords
- sealing
- sealing plate
- elastic element
- sealing structure
- hydrogen
- 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.)
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- 238000007789 sealing Methods 0.000 title claims abstract description 67
- 239000001257 hydrogen Substances 0.000 claims abstract description 38
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 38
- -1 hydrogen compound Chemical class 0.000 claims abstract description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000003054 catalyst Substances 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000443 aerosol Substances 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/028—Seals, e.g. for pressure vessels or containment vessels
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
- G21C9/04—Means for suppressing fires ; Earthquake protection
- G21C9/06—Means for preventing accumulation of explosives gases, e.g. recombiners
-
- 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
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention provides an automatically openable sealing structure, which comprises a sealing plate and an elastic element; wherein the sealing plate is provided with a through hole, and a filter element is arranged on the through hole; the elastic element deforms when the temperature is higher than a preset value, and applies a force to the sealing plate so as to open the sealing plate. Compared with the prior art, the sealing structure can keep the sealing state during the storage standby period of the hydrogen compound device in the containment vessel; in the accident state, the sealing structure is opened, so that the hydrogen compound device can be automatically put into operation.
Description
Technical Field
The invention relates to a sealing structure capable of being opened automatically.
Background
When the design standard and the over-design standard of the nuclear power station are in accidents (extremely low probability events), a large amount of hydrogen is generated in the containment, the hydrogen reaches a certain concentration, the explosion lower limit is exceeded, explosion accidents can be caused, and the safety of the containment is threatened.
The existing nuclear power station generally adopts a passive hydrogen combiner to solve the problem of hydrogen elimination in the containment enclosure environment. However, in a non-accident state, the passive hydrogen recombiner is in a standby state for a long time, and the catalyst is exposed to the environment and is easily influenced by poisoning substances generated during the maintenance equipment and the operation of the equipment in the containment, so that the performance of the catalyst is reduced. In particular, since the probability of occurrence of design reference accidents and serious reference accidents is extremely low, the passive hydrogen recombiner is in a standby state for a long time during the normal operation of the nuclear power plant, and the catalytic unit is exposed to the environment in the containment for a long time, so that the catalytic unit is disabled. In addition, during the running process or maintenance of the equipment in the containment, aerosol which can poison the catalyst is generated, in order to prevent the catalyst surface active center from being accidentally covered to lead to the deactivation of the catalyst, in general, in the maintenance requirement of the passive hydrogen compounder, the isolation protection of the hydrogen compounder is clearly required during the overhaul, but the operation is not easy to realize in the actual implementation; even if isolation protection is performed during overhaul, routine equipment repair and maintenance situations still occur. In the existing hydrogen compounder, the function of the catalytic unit is difficult to be well protected, the catalytic unit is prevented from being influenced by external adverse environment, and the aim of well ensuring the performance in the standby period is effectively fulfilled.
Therefore, how to provide a sealing structure, which can enable the hydrogen compound device to maintain a sealing state during the storage standby period in the containment vessel; in an accident state, the sealing structure is opened, so that the automatic operation of the hydrogen recombiner becomes a problem to be solved.
Disclosure of Invention
The invention provides an automatic opening sealing structure, which aims at the defects of the prior art and comprises a sealing plate and an elastic element; wherein the sealing plate is provided with a through hole, and a filter element is arranged on the through hole; the elastic element deforms when the temperature is higher than a preset value, and applies a force to the sealing plate so as to open the sealing plate.
Preferably, the filter element is a high efficiency filter paper or a semi-permeable membrane.
Preferably, the elastic element is made of a memory alloy or a bimetallic material, either unidirectional or bidirectional.
Preferably, the preset value is 60-80 ℃.
Preferably, the automatically openable sealing structure is applied to a hydrogen recombiner.
Preferably, the sealing structure is pre-tensioned at an interface of the hydrogen recombination device in communication with air.
Preferably, the pretension is provided by fastening with a fastener.
Preferably, the resilient element applies an outward pulling force to the fastener to break the fastener and open the seal plate.
Preferably, the resilient element applies a transverse shear force to the fastener to break the fastener and open the seal plate.
Preferably, the hydrogen recombiner is disposed within a containment vessel.
Compared with the prior art, the sealing structure can keep the sealing state during the storage standby period of the hydrogen compound device in the containment vessel; in the accident state, the sealing structure is opened, so that the hydrogen compound device can be automatically put into operation.
Drawings
Fig. 1 is a schematic view of a seal structure according to a preferred embodiment of the present invention.
FIG. 2 is a second schematic view of a seal structure according to a preferred embodiment of the present invention.
1-sealing a fastener bolt;
2-sealing plate;
3-elastic elements, 31-first elastic elements; 32-a second elastic element;
4-a support;
5-through holes;
a 6-hydrogen recombiner;
7-sealing the fastener nut;
8-shearing piece.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 and 2, the present invention provides an automatically openable sealing structure including a sealing plate 2 and an elastic member 3; wherein, the sealing plate 2 is provided with a through hole 5, and a filter element is arranged on the through hole 5; the elastic element 3 is deformed when the temperature is greater than a preset value, and applies a force to the sealing plate 2 to open the sealing plate 2. The elastic element 3 generates deformation acting force according to temperature change so as to be opened, so that the sealing structure is kept in a sealing state under the normal condition, and can be automatically opened only when the temperature reaches a preset value, thereby realizing the automation of the sealing structure.
Preferably, the filter element is a high efficiency filter paper or a semi-permeable membrane. The sealing plate is provided with high-efficiency filter paper or a semipermeable membrane or HEPA or other materials as a filtering piece, and the filtering piece can permeate gases such as hydrogen and the like and can prevent aerosol particles from passing through. The balance of the internal and external gases is maintained, and no pressure difference exists. Meanwhile, part of hydrogen can enter the hydrogen compound device to react with the catalytic element in advance in the initial stage of the accident, so that the temperature of the catalytic element is increased.
Preferably, the elastic element 3 is made of a memory alloy or a bimetallic material, either unidirectional or bidirectional. Due to the adoption of the material, under certain temperature conditions, such as the ambient temperature being higher than 60 ℃, the sealing plate is opened according to the natural restoring force of the elastic element 3, so that the air channel of the hydrogen compound device 6 is opened, a large amount of hydrogen enters, and the normal hydrogen elimination function is realized.
Preferably, the preset value is 60-80 ℃. Other temperature values may be set according to actual needs.
Preferably, the automatically openable sealing structure is applied to the hydrogen recombiner 6. The hydrogen compounder 6 has an automatically openable sealing structure, so that the possibility of performance degradation caused by exposure of the catalyst to the environment and the poisoning substances generated during the maintenance of equipment and the operation of the equipment in the containment can be avoided.
Preferably, the sealing structure is preloaded at the interface of the hydrogen recombiner 6 with air. The sealing plate 2 is arranged at all the interfaces of the hydrogen compounder 6 with air circulation, and the sealing plate 2 is tightly pressed at the air circulation ports of the hydrogen compounder by a pre-tightening mode, so that the inside of the hydrogen compounder 6 is sealed.
Preferably, as shown in fig. 1 and 2, the pretension is provided in such a way that it is fixed using a fastener. A bolt fixture is used comprising a sealing fastener bolt 1 and a sealing fastener nut 7. A support 4 is provided between the sealing fastener bolt 1 and the sealing fastener nut 7. The sealing structure is prevented from being forced to be opened when the floating platform shakes, so that a good sealing effect can be achieved.
Preferably, as shown in fig. 1 and 2, the elastic member 3 includes a first elastic member 31 and a second elastic member 32, and the first elastic member 31 applies an outward tension to the fastening member to break the fastening member so that the sealing plate 2 is opened. Preferably, the second elastic element 32 applies a transverse shearing force to the fastener by the shearing member 8 to break the fastener and open the sealing plate 2.
Preferably, the hydrogen recombiner 6 is disposed within a containment vessel. Therefore, the problems that a large amount of hydrogen is generated in the containment when the design standard and the over-design standard accidents (extremely low probability events) of the nuclear power station occur, the hydrogen reaches a certain concentration, explosion accidents can be caused when the concentration exceeds the explosion lower limit, and the safety of the containment is threatened are solved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, the description is relatively simple because of corresponding to the method disclosed in the embodiment, and the relevant points refer to the description of the method section.
Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not intended to be limiting.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (5)
1. The sealing structure capable of being opened automatically is characterized in that the sealing structure capable of being opened automatically is applied to a hydrogen compound device, the sealing structure is preloaded and arranged at an interface of the hydrogen compound device, which is communicated with air, and comprises a sealing plate and an elastic element; wherein,,
compressing a sealing plate on an air circulation port of the hydrogen combiner in a pre-compression mode, wherein the sealing plate is provided with a through hole, and a filter element is arranged on the through hole; the pretension is fixed by using a fastener, and comprises a sealing fastener bolt and a sealing fastener nut, wherein a supporting piece is arranged between the sealing fastener bolt and the sealing fastener nut;
the elastic element deforms when the temperature is higher than a preset value, and applies acting force to the sealing plate so as to open the sealing plate; the elastic element comprises a first elastic element and a second elastic element, wherein the first elastic element exerts outward pulling force on the fastening piece so as to break the fastening piece to open the sealing plate, and the second elastic element exerts transverse shearing force on the fastening piece through the shearing piece so as to break the fastening piece to open the sealing plate.
2. The automatically openable sealing structure of claim 1 wherein said filter element is a high efficiency filter paper or a semipermeable membrane.
3. The automatically openable sealing structure of claim 1 wherein said elastic member is made of a one-way or two-way memory alloy or a bimetallic material.
4. The automatically openable sealing structure of claim 1 wherein said preset value is 60 ℃ to 80 ℃.
5. The automatically openable seal structure of claim 1 wherein said hydrogen recombiner is disposed within a containment vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915311.XA CN106297913B (en) | 2016-10-20 | 2016-10-20 | Sealing structure capable of being automatically opened |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915311.XA CN106297913B (en) | 2016-10-20 | 2016-10-20 | Sealing structure capable of being automatically opened |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106297913A CN106297913A (en) | 2017-01-04 |
| CN106297913B true CN106297913B (en) | 2023-09-15 |
Family
ID=57720095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610915311.XA Active CN106297913B (en) | 2016-10-20 | 2016-10-20 | Sealing structure capable of being automatically opened |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106297913B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2346332A1 (en) * | 1973-09-14 | 1975-03-27 | Babcock & Wilcox Ag | SEAL FOR THE CLOSURE OF A PRESSURE VESSEL |
| CA1189570A (en) * | 1983-10-17 | 1985-06-25 | Hans Arup | Method and device for determining hydrogen flux |
| US5120488A (en) * | 1990-01-31 | 1992-06-09 | Abb Atom Ab | Sealing sleeve of memory metal |
| GB9219197D0 (en) * | 1991-09-20 | 1992-10-28 | Westinghouse Electric Corp | An apparatus for sealing a conduit having an open end |
| JP2001242121A (en) * | 2000-02-29 | 2001-09-07 | Ngk Spark Plug Co Ltd | Gas sensor and sealing structure |
| JP2003185031A (en) * | 2001-12-18 | 2003-07-03 | Ngk Insulators Ltd | Holder for sealing, sealing device and holding device |
| CN101459247A (en) * | 2007-12-13 | 2009-06-17 | 法国原子能委员会 | Superplastic sealing system, preferentially for electrochemical cell system |
| CN101994885A (en) * | 2009-08-11 | 2011-03-30 | 维克托里克公司 | Seal with rigid stop ring |
| KR20120001474U (en) * | 2011-05-04 | 2012-03-05 | 한국원자력기술 주식회사 | Passive Auto-catalytic Recombiner |
| CA2865508A1 (en) * | 2012-03-27 | 2013-10-03 | Baker Hughes Incorporated | Shape memory seal assembly |
| CN104240777A (en) * | 2014-09-17 | 2014-12-24 | 四川材料与工艺研究所 | Online regular check and regeneration device and method based on hydrogen-oxygen composite catalytic plate in nuclear power plant containment |
| CN105903354A (en) * | 2016-06-03 | 2016-08-31 | 成都美富特膜科技有限公司 | Membrane core pre-tightening structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2342461A (en) * | 1998-09-23 | 2000-04-12 | Tronic Ltd | Submersible connector |
| EP1826421A1 (en) * | 2006-02-23 | 2007-08-29 | The European Community, represented by the European Commission | Sealing device and method for sealing |
| US8687759B2 (en) * | 2007-11-15 | 2014-04-01 | The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Internal dry containment vessel for a nuclear reactor |
| US8588360B2 (en) * | 2007-11-15 | 2013-11-19 | The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Evacuated containment vessel for a nuclear reactor |
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| CA1189570A (en) * | 1983-10-17 | 1985-06-25 | Hans Arup | Method and device for determining hydrogen flux |
| US5120488A (en) * | 1990-01-31 | 1992-06-09 | Abb Atom Ab | Sealing sleeve of memory metal |
| GB9219197D0 (en) * | 1991-09-20 | 1992-10-28 | Westinghouse Electric Corp | An apparatus for sealing a conduit having an open end |
| JP2001242121A (en) * | 2000-02-29 | 2001-09-07 | Ngk Spark Plug Co Ltd | Gas sensor and sealing structure |
| JP2003185031A (en) * | 2001-12-18 | 2003-07-03 | Ngk Insulators Ltd | Holder for sealing, sealing device and holding device |
| CN101459247A (en) * | 2007-12-13 | 2009-06-17 | 法国原子能委员会 | Superplastic sealing system, preferentially for electrochemical cell system |
| CN101994885A (en) * | 2009-08-11 | 2011-03-30 | 维克托里克公司 | Seal with rigid stop ring |
| KR20120001474U (en) * | 2011-05-04 | 2012-03-05 | 한국원자력기술 주식회사 | Passive Auto-catalytic Recombiner |
| CA2865508A1 (en) * | 2012-03-27 | 2013-10-03 | Baker Hughes Incorporated | Shape memory seal assembly |
| CN104240777A (en) * | 2014-09-17 | 2014-12-24 | 四川材料与工艺研究所 | Online regular check and regeneration device and method based on hydrogen-oxygen composite catalytic plate in nuclear power plant containment |
| CN105903354A (en) * | 2016-06-03 | 2016-08-31 | 成都美富特膜科技有限公司 | Membrane core pre-tightening structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106297913A (en) | 2017-01-04 |
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 056027 No. 17, Exhibition Road, Handan, Hebei Applicant after: 718th Research Institute of China Shipbuilding Corp. Applicant after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 056027 No. 17, Exhibition Road, Handan, Hebei Applicant before: Handan Purifying Equipment Research Institute Applicant before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE |
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