CN106855156A - double-layer sleeve structure and nuclear reactor - Google Patents
double-layer sleeve structure and nuclear reactor Download PDFInfo
- Publication number
- CN106855156A CN106855156A CN201710045374.9A CN201710045374A CN106855156A CN 106855156 A CN106855156 A CN 106855156A CN 201710045374 A CN201710045374 A CN 201710045374A CN 106855156 A CN106855156 A CN 106855156A
- Authority
- CN
- China
- Prior art keywords
- pipeline section
- sealing
- plug
- face
- nuclear reactor
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
- F16L9/19—Multi-channel pipes or pipe assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
- F16L25/10—Sleeveless joints between two pipes, one being introduced into the other
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The present invention relates to nuclear reactor and its sealing structure of double-layer sleeve structure and return, pipeline includes the first pipeline section, the second pipeline section.Sealing structure is included in the running-on that the first pipeline section one end relative with the second pipeline section is set, set in the second pipeline section one end relative with the first pipeline section, pluggable be inserted into the intraoral plug of set, and, the sealing mechanism set between the plug end face relative with the first pipeline section two, sealing mechanism forms end face seal between the plug end face relative with the first pipeline section two.The sealing structure that the pipeline of nuclear reactor is used can be after the plug of the second pipeline section insertion running-on, and the end face seal that sealing mechanism can be respectively with plug, the first pipeline section coordinates, and realizes the sealing between the first pipeline section, the second pipeline section.Direct out extraction and be capable of achieving the first pipeline section, the separation of the second pipeline section, it is ensured that the dismounting between the first pipeline section, the second pipeline section is convenient, is easy to the work such as inspection and maintenance.
Description
Technical field
The present invention relates to nuclear power field, more specifically to a kind of nuclear reactor and its double-layer sleeve structure and loop
The sealing structure of pipeline.
Background technology
Nuclear power is applied as clean energy resource by extensive construction.In traditional nuclear power station, such as compressed water reactor nuclear power
Stand, generally include the main equipments such as pressure vessel, steam generator, main pump, voltage-stablizer.Conventionally, as nuclear power station
Build place sufficient, larger, be generally attached by long pipeline between pressure vessel, steam generator, main pump,
Equipment import and export is both needed to set connection ozzle.The spacing of whole equipment arrangement is larger, and pipeline is more long, so equipment occupation space
It is larger.
However, the increase of the dissipation requirements with electricity consumption, the construction of large nuclear power station is gradually limited, slowly the need for
More miniaturization nuclear power stations.In nuclear power station is minimized, due to the limitation for minimizing, if still using master between each main equipment
Pipeline, the structure of connection ozzle are attached, and certainly will cause oversized, it is impossible to applicable requirements.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of improved nuclear reactor and its double-layer sleeve structure and return
The sealing structure of road pipeline.
The technical solution adopted for the present invention to solve the technical problems is：Construction is a kind of for nuclear reactor return
Sealing structure, the pipeline includes the first pipeline section, the second pipeline section；
The sealing structure is included in the running-on that first pipeline section one end relative with second pipeline section is set, in institute
State the second pipeline section one end relative with first pipeline section set, it is pluggable be inserted into the intraoral plug of the set, and,
Between the plug end face relative with first pipeline section two set sealing mechanism, the sealing mechanism the plug with
End face seal is formed between the relative end face of first pipeline section two.
Preferably, the sealing mechanism be included in the plug end face relative with first pipeline section set, with and institute
State the first sealing ring sealed between the first pipeline section；And/or, set in first pipeline section end face relative with the plug,
With the second sealing ring sealed and the end face of the plug between.
Preferably, the end face of the plug is provided with the mounting groove installed for first sealing ring.
Preferably, the section profile of first sealing ring is O shapes or C-shaped or W shapes, and material is corrosion resistant metal material.
Preferably, first sealing ring, the second sealing ring it is of different sizes, wherein big one is set in small one
Periphery.
Preferably, between first sealing ring and first pipeline section it is face sealing or linear sealing, second sealing
It is face sealing and/or linear sealing between circle and the plug.
Preferably, gap is left between the end face of the plug and first pipeline section.
Preferably, the end of the end of the plug and/or the running-on is provided with for guiding the plug to be inserted into institute
State the intraoral guide portion of set；
The guide portion includes guide surface, and the guide surface is obliquely installed or in cambered surface.
Preferably, the sealing structure is additionally included in the outside wall surface of the plug the first groove set along border；With/
Or, the sealing structure is additionally included on the internal face of the running-on the second groove set along border.
Preferably, the outside wall surface of the plug is provided with some first grooves, and each first groove is axially spaced
Arrangement.
Preferably, first groove, the second groove stagger in the axial direction.
The present invention also constructs a kind of double-layer sleeve structure for nuclear reactor, the double-layer sleeve structure include inner tube and
It is set in the outer tube outside said inner tube, said inner tube includes the first pipeline section, the second pipeline section that plug, first pipeline section, the
Using described sealing structure between two pipeline sections.
The present invention also construct a kind of nuclear reactor, including at least two chambers, also including be connected to described two chambers it
Between described double-layer sleeve structure, first passage, said inner tube outside wall surface and the outer tube wall face are formed in said inner tube
Between form second channel；The first passage mutually completely cuts off with the second channel.
Implement the sealing structure of nuclear reactor of the invention and its double-layer sleeve structure and return, with following beneficial
Effect：The sealing structure that the pipeline of nuclear reactor is used can be after the plug of the second pipeline section insertion running-on, sealing mechanism
End face seal with plug, the first pipeline section respectively coordinates, and realizes the sealing between the first pipeline section, the second pipeline section.Direct out and pull out
Go out and be capable of achieving the first pipeline section, the separation of the second pipeline section, it is ensured that the dismounting between the first pipeline section, the second pipeline section is convenient, be easy to inspection
The work such as look into and repair.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the cross-sectional view of the double-layer sleeve structure in the embodiment of the present invention；
Fig. 2 is the enlarged diagram of the partial view C in Fig. 1；
Fig. 3 is schematic diagram when sealing mechanism in Fig. 1 includes the second sealing ring for setting on the first segment；
Fig. 4 be the nuclear reactor in the embodiment of the present invention main pump, between steam generator, pressure vessel be connected with it is double
Structural representation during layer sleeve structure.
Specific embodiment
In order to be more clearly understood to technical characteristic of the invention, purpose and effect, now compare accompanying drawing and describe in detail
Specific embodiment of the invention.
As shown in Figure 1 and Figure 2, the sealing structure for nuclear reactor return in a preferred embodiment of the invention
Pipeline include the first pipeline section 411, the second pipeline section 412, it is relative with the second pipeline section 412 that sealing structure is included in the first pipeline section 411
The running-on 413 that sets of one end, in one end setting relative with the first pipeline section 411 of the second pipeline section 412, pluggable be inserted into set
Plug 414 in mouth 413, and, the sealing mechanism set between 411 liang of relative end faces of plug 414 and the first pipeline section
415, sealing mechanism 415 forms end face seal between 411 liang of relative end faces of plug 414 and the first pipeline section.
The sealing structure that first pipeline section 411, the position of the docking of the second pipeline section 412 use can inserting in the second pipeline section 412
After first 414 insertion running-on 413, the end face seal that sealing mechanism 415 can be respectively with plug 414, the first pipeline section 411 coordinates, real
Existing sealing between first pipeline section 411, the second pipeline section 412.Direct out extraction and be capable of achieving the first pipeline section 411, the second pipeline section
412 separation, it is ensured that the dismounting between the first pipeline section 411, the second pipeline section 412 is convenient, is easy to the work such as inspection and maintenance.
In certain embodiments, sealing mechanism 415 be included in the end face relative with the first pipeline section 411 of plug 414 set, with
And first the first sealing ring 4151 sealed between pipeline section 411, after the insertion running-on 413 of plug 414, the first sealing ring 4151 and the
Coordinate between the end face of one pipeline section 411, compress and realize sealing.
Further, the end face of plug 414 is provided with the mounting groove 4141 installed for the first sealing ring 4151, can allow the
The position of one sealing ring 4151 is fixed, while also can guarantee that the sealing effectiveness kept between plug 414.
In certain embodiments, between the first sealing ring 4151 and the first pipeline section 411 can be face sealing, or line
Sealing, also can simultaneously include face sealing or linear sealing.
The section profile of the first sealing ring 4151 is O shapes or C-shaped or W shapes, and material is corrosion resistant metal material, such as stainless steel
Or nickel-base alloy, this kind of material, using there is more mature experience, there is a preferable anti-corrosion capability in heap, therefore this is first close
Seal 4151 can be with long-term use, according to service condition using just needing to carry out more after the several years in the primary Ioops medium of reactor
Change, the material of selection is high temperature proprietary material, and the situation that stress relaxation occurs under working temperature is less.
When the section of the first sealing ring 4151 is O shapes, after plug 414 is inserted, the first sealing ring 4151 and first is managed
The end face of section 411 coordinates realizes sealing.When the section of the first sealing ring 4151 is C-shaped or W shapes, can may not be used with spring yet
Band spring, after plug 414 is inserted, the first sealing ring 4151 is allowed by prepressing deformation by the screen resilience of itself or the power of spring
Axial two ends coordinate with the end face of the pipeline section 411 of plug 414 and first respectively realizes sealing.
As shown in figure 3, in other embodiments, sealing mechanism 415 also is included in the first pipeline section 411 with the phase of plug 414
To end face set, with and the end face of plug 414 between seal the second sealing ring 4152, plug 414 insertion running-on 413 after,
Coordinate between second sealing ring 4152 and the end face of plug 414, compress and realize sealing.Certainly, can also be set on plug 414 simultaneously
Put the first sealing ring 4151 and the second sealing ring 4152 is set on the first pipeline section 411.
Further, the first sealing ring 4151, the second sealing ring 4152 it is of different sizes, wherein big one be set in it is small
A periphery, inside and outside two circles sealing is formed on end face.Certainly, the first sealing ring 4151, the size of the second sealing ring 4152
Also can be identical, sealing is realized after abutting.Can be between second sealing ring 4152 and plug 414 face sealing, or
Linear sealing, also can simultaneously include face sealing or linear sealing.
Preferably, the end of running-on 413 is provided with the guide portion 4131 for guiding plug 414 to be inserted into running-on 413；Draw
Leading portion 4131 includes guide surface, and guide surface is obliquely installed or in cambered surface.Guide portion 4131 may also be arranged on the end of plug 414,
Or set simultaneously in the end of the end of running-on 413 and plug 414.
In certain embodiments, sealing structure is additionally included in the outside wall surface of plug 414 the first groove set along border
416.Can there is certain minim gap between the outside wall surface of plug 414 and the internal face of running-on 413, due to inside and outside pipeline it
Between pressure difference cause fluid to be flowed through in this minim gap, and there is energy dissipation in the first groove 416 in fluid, pressure by
Gradually reduce, be finally reached balance, realize sealing.This kind of sealing device is axial direction relative to sealing ring due to sealing force, is
Traditional end face seal, while sealing is ensured, moreover it is possible to allow sealing that certain axial slip occurs, so as to ensure whole
Independence inside and outside service phase interior conduit.
The outside wall surface of plug 414 is provided with some first grooves 416, and the axially spaced arrangement of each first groove 416, makes
Fluid engenders energy dissipation in the presence of each first groove 416, makes the effect of sealing more preferable.
In other embodiments, sealing structure is additionally included on the internal face of running-on 413 the second groove set along border,
Also the energy to fluid dissipates, and the second groove can be the multiple of or axially spaced arrangement.Preferably, the first groove
416th, the second groove staggers in the axial direction, and the pressure for allowing fluid independently is reduced.
Preferably, gap is left between the end face of plug 414 and the first pipeline section 411, can be met under pipeline uniform temperature
Extra axial expansion is produced, assembling will not be influenceed, remain to keep sealing effectiveness.The sealing structure of pipeline can apply to list
The sealing of only pipeline, can also be applied to double-layer sleeve structure.
With reference to shown in Fig. 2, Fig. 4, the double-layer sleeve structure 4 in a preferred embodiment of the invention includes inner tube 41 and is arranged
First passage A is formed in outer tube 42 outside inner tube 41, inner tube 41, second is formed between the outside wall surface of inner tube 41 and the internal face of outer tube 42
Passage B, first passage A mutually completely cuts off with second channel B, so that cooling agent is to the circulation of different directions.
In conjunction with shown in Fig. 1, Fig. 2, the first pipeline section 411 of pipeline, the second pipeline section 412 constitute inner tube 41 in the present invention, the
One pipeline section 411, the general material of the second pipeline section 412 are corrosion resistant metal material, such as stainless steel or nickel-base alloy, respectively from outer tube
The corresponding chamber in 42 two ends is installed and is inserted into outer tube 42, and connection forms first passage A after docking, is placed among outer tube 42.The
Primary Ioops high radioactivity medium is filled with one passage A, second channel B, is existed before first passage A, second channel B certain
Pressure difference, due to the sealing that the sealing structures such as the first sealing ring 4151, the first groove 416 are realized, first passage A, second channel B
Two runners are separate will not mutually to be revealed, with certain bearing capacity.
In certain embodiments, gap is left between the end face of plug 414 and the first pipeline section 411.When the material of outer tube 42
Thermal linear expansion rate than the first pipeline section 411, the hour of the second pipeline section 412, the first pipeline section 411, the second pipeline section 412 after installing
Joint exist one installation gap, inner tube 41 produces extra axle relative to outer tube 42 under can meeting pipeline uniform temperature
To expansion, the big I in gap is arbitrarily adjusted according to application scenario.
Similarly, when the material of outer tube 42 thermal linear expansion rate than the first pipeline section 411, the second pipeline section 412 it is big when, installing
The first pipeline section 411, the joint of the second pipeline section 412 installation gap are zero after finishing, and joint can produce gap at a certain temperature, full
Sufficient inner tube 41 produces extra axial shrinkage relative to outer tube 42.Between being left between the end face of plug 414 and the first pipeline section 411
Gap can eliminate piping thermal prestressed, it is ensured that sealing structure feature.Applicable temperature pressure limit of the present invention is wider, and with preferable
Flouride-resistani acid phesphatase and corrosion resistance, can be widely used in being similar to double braid covering in one loop of nuclear power station, secondary circuit and accessory system
In tubular construction 4.
When the first pipeline section 411, the second pipeline section 412 are extracted from outer tube 42, direct out extraction and be capable of achieving the first pipe
Section the 411, second pipeline section 412 separation, it is ensured that the dismounting between the first pipeline section 411, the second pipeline section 412 is convenient, be easy to check and
The work such as maintenance.
As shown in figure 4, the nuclear reactor in a preferred embodiment of the invention includes main pump 1, steam generator 2, pressure
Double-layer sleeve structure 4 is connected between the chamber of container 3, steam generator 2 and pressure vessel 3, main pump 1 can be by double braid covering
Tubular construction 4 is connected with steam generator 2, it is also possible to be connected with pressure vessel 3 by double-layer sleeve structure 4, provides cold in main pump 1
But during agent circulation power, corresponding circulating reflux, double braid covering are formed between each cavity in pressure vessel 3, steam generator 2
Tubular construction 4 can shorten the connecting length between main pump 1, steam generator 2, pressure vessel 3.
It is to be appreciated that above-mentioned each technical characteristic can be used in any combination and unrestricted.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of sealing structure for nuclear reactor return, the pipeline includes the first pipeline section（411）, the second pipeline section
（412）, it is characterised in that；
The sealing structure is included in first pipeline section（411）With second pipeline section（412）The set that relative one end is set
Mouthful（413）, in second pipeline section（412）With first pipeline section（411）Relative one end sets, pluggable be inserted into institute
State running-on（413）Interior plug（414）, and, in the plug（414）With first pipeline section（411）Two relative end faces
Between set sealing mechanism（415）, the sealing mechanism（415）In the plug（414）With first pipeline section（411）Two
End face seal is formed between relative end face.
2. the sealing structure for nuclear reactor return according to claim 1, it is characterised in that the sealer
Structure（415）It is included in the plug（414）With first pipeline section（411）Relative end face sets, with first pipeline section
（411）Between seal the first sealing ring（4151）；And/or, in first pipeline section（411）With the plug（414）Relatively
End face set, with the plug（414）End face between seal the second sealing ring（4152）.
3. the sealing structure for nuclear reactor return according to claim 2, it is characterised in that the plug
（414）End face be provided with for first sealing ring（4151）The mounting groove of installation（4141）；
First sealing ring（4151）Section profile be O shapes or C-shaped or W shapes, material be corrosion resistant metal material.
4. the sealing structure for nuclear reactor return according to claim 2, it is characterised in that described first is close
Seal（4151）, the second sealing ring（4152）It is of different sizes, wherein big one is set in a small periphery.
5. the sealing structure for nuclear reactor return according to claim 2, it is characterised in that described first is close
Seal（4151）With first pipeline section（411）Between be face sealing or linear sealing, second sealing ring（4152）With it is described
Plug（414）Between be face sealing and/or linear sealing.
6. the sealing structure for nuclear reactor return according to claim 1, it is characterised in that the plug
（414）End face and first pipeline section（411）Between leave gap.
7. the sealing structure for nuclear reactor return according to any one of claim 1 to 6, it is characterised in that
The sealing structure is additionally included in the plug（414）Outside wall surface on along border set the first groove（416）；And/or,
The sealing structure is additionally included in the running-on（413）Internal face on along border set the second groove, first groove
（416）, the second groove staggers in the axial direction.
8. the sealing structure for nuclear reactor return according to claim 7, it is characterised in that the plug
（414）Outside wall surface be provided with some first grooves（416）, and each first groove（416）Axially spaced arrangement.
9. a kind of double-layer sleeve structure for nuclear reactor（4）, it is characterised in that the double-layer sleeve structure（4）Including interior
Pipe（41）Be set in said inner tube（41）Outer outer tube（42）, said inner tube（41）Including the first pipeline section for plugging（411）、
Second pipeline section（412）, first pipeline section（411）, the second pipeline section（412）Between using described in any one of claim 1 to 8
Sealing structure.
10. a kind of nuclear reactor, including at least two chambers, it is characterised in that also including being connected between described two chambers
Claim 9 described in double-layer sleeve structure（4）, said inner tube（41）Interior formation first passage（A）, said inner tube（41）Outward
Wall and the outer tube（42）Second channel is formed between internal face（B）；The first passage（A）With the second channel（B）Phase
Mutually isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045374.9A CN106855156A (en) | 2017-01-20 | 2017-01-20 | double-layer sleeve structure and nuclear reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045374.9A CN106855156A (en) | 2017-01-20 | 2017-01-20 | double-layer sleeve structure and nuclear reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106855156A true CN106855156A (en) | 2017-06-16 |
Family
ID=59125240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710045374.9A Pending CN106855156A (en) | 2017-01-20 | 2017-01-20 | double-layer sleeve structure and nuclear reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106855156A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135728A (en) * | 2021-11-19 | 2022-03-04 | 中国北方发动机研究所(天津) | Sealing structure supported by flexible multiple points |
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|---|---|---|---|---|
| US4039377A (en) * | 1974-03-20 | 1977-08-02 | Commissariat A L'energie Atomique | Nuclear boiler |
| US4094737A (en) * | 1976-04-30 | 1978-06-13 | Siemens Aktiengesellschaft | Pressurized-water reactor installation |
| US4285770A (en) * | 1979-07-12 | 1981-08-25 | General Electric Company | Jet pump with labyrinth seal |
| US4400345A (en) * | 1979-10-30 | 1983-08-23 | Commissariat A L'energie Atomique | Nuclear boiler with concentric tubes and removable safety sleeve |
| US4734250A (en) * | 1984-03-28 | 1988-03-29 | Westinghouse Electric Corp. | Concentric pipe loop arrangement for pressurized water nuclear reactors |
| US6345084B1 (en) * | 1999-11-19 | 2002-02-05 | General Electric Company | Apparatus and methods for replacing a core spray T-box/thermal sleeve in a nuclear reactor |
| US20040183262A1 (en) * | 2003-01-15 | 2004-09-23 | Nichias Corporation | Combination metal gasket and seal structure |
| CN206555585U (en) * | 2017-01-20 | 2017-10-13 | 中广核研究院有限公司 | The sealing structure of nuclear reactor and its double-layer sleeve structure and return |
-
2017
- 2017-01-20 CN CN201710045374.9A patent/CN106855156A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039377A (en) * | 1974-03-20 | 1977-08-02 | Commissariat A L'energie Atomique | Nuclear boiler |
| US4094737A (en) * | 1976-04-30 | 1978-06-13 | Siemens Aktiengesellschaft | Pressurized-water reactor installation |
| US4285770A (en) * | 1979-07-12 | 1981-08-25 | General Electric Company | Jet pump with labyrinth seal |
| US4400345A (en) * | 1979-10-30 | 1983-08-23 | Commissariat A L'energie Atomique | Nuclear boiler with concentric tubes and removable safety sleeve |
| US4734250A (en) * | 1984-03-28 | 1988-03-29 | Westinghouse Electric Corp. | Concentric pipe loop arrangement for pressurized water nuclear reactors |
| US6345084B1 (en) * | 1999-11-19 | 2002-02-05 | General Electric Company | Apparatus and methods for replacing a core spray T-box/thermal sleeve in a nuclear reactor |
| US20040183262A1 (en) * | 2003-01-15 | 2004-09-23 | Nichias Corporation | Combination metal gasket and seal structure |
| CN206555585U (en) * | 2017-01-20 | 2017-10-13 | 中广核研究院有限公司 | The sealing structure of nuclear reactor and its double-layer sleeve structure and return |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135728A (en) * | 2021-11-19 | 2022-03-04 | 中国北方发动机研究所(天津) | Sealing structure supported by flexible multiple points |
| CN114135728B (en) * | 2021-11-19 | 2023-11-21 | 中国北方发动机研究所(天津) | Sealing structure of flexible multi-point support |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170616 |
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| RJ01 | Rejection of invention patent application after publication |