CN202176712U - C-shaped cladding sealing ring with built-in spring - Google Patents
C-shaped cladding sealing ring with built-in spring Download PDFInfo
- Publication number
- CN202176712U CN202176712U CN2011200343323U CN201120034332U CN202176712U CN 202176712 U CN202176712 U CN 202176712U CN 2011200343323 U CN2011200343323 U CN 2011200343323U CN 201120034332 U CN201120034332 U CN 201120034332U CN 202176712 U CN202176712 U CN 202176712U
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- ring
- inconel
- spring
- sealing ring
- sealing
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Abstract
The utility model discloses a C-shaped cladding sealing ring with a built-in spring. The C-shaped cladding sealing ring is composed of three parts including a first ring composed of high-purity silver, a second ring composed of inconel 600, and a helical spring formed by inconel 750 in a manner of winding, wherein the inconel 750 is covered by the inconel 600, the external side of the sealing ring formed by such connections is peripherally provided with an opening. The cross section of the sealing ring is C-shaped, and the sealing ring comprises a radial external sealing face and a radio internal sealing face. While compressing the sealing ring, each circle of the helical spring exerts additional resilience force to the inconel 600 ring, and deforms the high-purity silver ring plastically, thus, micro gaps on the surface of a flange are filled. With such cooperation of elasticity and plasticity, the metallic sealing ring has better sealing performance and capability of compensating the flange deformation and the sealing ring relaxation caused by temperature and pressure fluctuation.
Description
Technical field
The present invention relates to the Sealing in the pressurized container under a kind of important events, the cladding sealing ring that especially uses in high temperature, high pressure vessel and the voltage stabilizer.
Background technique
Sealing under high temperature, high pressure working condition such as nuclear power station, must consider following technical order: leak-down rate is all the time≤10 under the situation of temperature and pressure alternation 1, will to guarantee run duration
-9Pam3/s, 3, in accident as in the quick cooling, leak-down rate≤10
-6Pam3/s.Be the vitals that uses in the cogeneration power plant equipment in pressurized container and the voltage stabilizer, various types of static seals must be arranged when these parts link to each other with the external world to prevent the leakage of thermal cycle transformation working medium.Sealing has various cross-sectional structure with the various parts of special sealing, for example adopts usually: pure nickel solid torus pad, spirotallic gasket, grooved metal gasket, turbine pad etc.But these pads all be difficult to avoid the situation lower levelling plate at temperature and pressure alternation can produce stress relaxation so that cause leak-down rate do not reach≤10
-9The requirement of Pam3/s.
So the Sealing that a kind of better effects if need be provided guarantees the sealing of junction between the pressurized container flange.
Summary of the invention
The purpose of this invention is to provide the C type seal ring of realizing plasticity and elasticity good fit; It can utilize the interaction between two kinds of different metal materials and the spring three to realize plasticity and flexible good fit, thereby makes this cladding sealing ring have excellent sealing performance.
Another object of the present invention provides a kind of C type seal ring, and it is lax that it can compensate the flange distortion and the seal ring that cause because of the temperature and pressure fluctuation.
This C type cladding sealing ring comprises: first ring, and said first ring is positioned at the outermost of seal ring, and its cross section is c-shaped, and has the first external sealed face and first inner sealing surface; Second ring, the said second ring outside is closely coated by said first ring, and its cross section is c-shaped, and has the second external sealed face and second inner sealing surface; Also comprise metal spring, said metal spring is located on the inboard of said second ring and is compressed by said second ring.
The combination of these three kinds of materials has formed stable sealing configuration, and exerting pressure each other with spring between first ring encircles with second helps compensating and tamping the tiny flaw of sealing surfaces.The circumferential openings position of this ring first ring is corresponding fully with the circumferential openings position of second ring, and whole one-tenth C shape we can say that also the cross section becomes C shape, has radially external sealed face and inner sealing surface.When compression sealing circle, each circle diameter of spiral spring produces additional rebounding force to the internal layer metal shell, and makes outer layer metal material generation plastic deformation, has tamped the tiny flaw on flange seal surface.The cooperation of this elasticity and plasticity makes this metal o-ring have good sealability and causes flange distortion and the lax ability of seal ring because of temperature and pressure fluctuates with compensation.
This seal ring, said first ring is inconel (inconel) 600, and said second ring is silver, and the material that said metal spring adopts is the inconel (inconel) 750 that is different from first ring.In inconel (inconel) 750, must contain chromium, the chemical property that adds the later spring material of chromium is highly stable under the nuclear plant pressure vessels operating mode, and formed spring has strong anti-corrosion capacity.Cooperatively interacting and mutual effect of the elasticity of above-mentioned three kinds of materials and plasticity makes this metallic packing ring have good sealability and causes flange distortion and the lax ability of seal ring because of temperature and pressure fluctuates with compensation
Said metal spring is a Monolithic spring, and the centre has only a solder joint, and/or said first ring has only a solder joint, and/or said second ring has only a solder joint; To guarantee the homogeneity of overall structure rigidity.
Seal ring provided by the invention because chromium has and can be dissolved in hydrochloric acid, sulfuric acid and perchloric acid, is met the nitric acid post-passivation owing to contain chromium, no longer with the character of acid reaction, has splendid homogenieity when forming a solder joint, is beneficial to radial seal and circumferentially compensates.
By the seal ring that above content is formed, make leak-down rate≤10
-9Pam3/s.
Description of drawings
According to the description and the accompanying drawing of hereinafter, can understand the present invention well, these accompanying drawings have shown non-restrictive example of the present invention.More particularly, in the accompanying drawings:
Further explain below in conjunction with instance:
Fig. 1 is the axial section of pressurized container, contains the sealing of embodiments of the invention junction point between pressure container cylinder flange and top cover flange.
Fig. 2 is the sectional view of the annular sealing ring of the embodiment of the invention shown in Fig. 1.
1 first ring, 2 second rings, 3 metal springs,
4 flanges, 5 ozzles, 6 top covers, 7 pressurized container supporting surfaces, 8 ring segments, 9 guiding devices, 10 shells
Embodiment
Shown in Figure 1 is the pressurized container of high temperature, pressure coolant; Cylindrical shell 10 is welded with freezing mixture by 4 one of the flanges of a strap bolt tapped hole and imports and exports 8 one changeover portions of ring segment and a semicircle lower seal head of ozzle 5 and be welded; Wherein top cover 6 is hot pressed into semicircle by steel plate; Be drilled with bolt hole at upper flange 4 upper peripheries, have on its supporting surface and place groove of the present invention.When high temperature, pressure coolant flow in pressurized container; Wherein some inwall along pressurized container directly flows to the pressure vessel outlet adapter; And follow the variation of temperature and pressure; Because pressure vessels top cover and shell flange are two independent parts of making, in pressurized container, must be assembled together and will guarantee high leak tightness, internal pressure will be far longer than the external pressure that pressurized container belongs to during the pressurized container operation; For preventing that freezing mixture from leaking, a seal ring is installed between pressure container cylinder and top cover.
Junction point will bear in the course of the work between pressure container cylinder and the top cover; Expansion that hot coolant produces and contraction and the radial and axial STRESS VARIATION that causes; The present invention adapts to the higher radial and axial STRESS VARIATION in this position with a kind of simply and effectively design, to obtain maximum sealing effect.
Through sectional view shown in Fig. 2, the present invention is able to clearer and more definite description.This ring is made up of three parts, comprises first ring, 1 and second ring of axially being made up of different materials relatively 2, and in the inboard metal spring 3 is set simultaneously, and a circumferential openings along the ring outside is arranged in the seal ring that links into an integrated entity; The described first ring cross section is c-shaped, has sealing surface radially; The described second ring cross section is c-shaped, has sealing surface radially; In described spiral spring is coated on by double layer of metal.First layer and second layer loop resistance have ended the circumferential stretching, extension of seal ring, thereby prevent to produce bad peripheral stress.
It is thus clear that the present invention more specifically is provided with the internal and external layer of unlike material respectively and is provided with spring 3 in the inboard in the traditional C V-shaped ring.
Preferably; Select two rings to be the metal of unlike material; As first ring for purity more than or equal to 99% silver; Second ring is inconel (inconel) 600, and the material that metal spring adopts is the inconel (inconel) 750 that is different from first ring, must contain chromium in the Inco nickel 750 and contain a spot of cobalt.
In preferred embodiment, first ring and second annulate shaft be to separating, and is two parts independently separately, two used metal materials differences of ring.The first layer metal ring is littler than second layer metal ring hardness, mainly is used for playing the good effect of making up, and is used for tamping the tiny flaw on flange seal surface.
First ring and second ring be made up of metallic material all have only a solder joint.Spiral spring in it is wrapped in by metal ring is a Monolithic spring, and the centre has only a solder joint, and preferable is beneficial to radial seal and circumferentially compensates.
Work medi-spring and first layer, second layer metal ring are used for sealing the various leakage radially that the freezing mixture of HTHP produces betwixt, make leak-down rate all the time under normal circumstances≤10
-9Pam3/s., the cooperation of this elasticity and plasticity makes this metal o-ring have good sealability and causes flange distortion and the lax ability of seal ring because of temperature and pressure fluctuates with compensation.
Claims (6)
1. the C shape cladding sealing ring of a built-in spring, it comprises:
First ring, said first ring is positioned at the outermost of seal ring, and its cross section is c-shaped, and has the first external sealed face and first inner sealing surface;
Second ring, the said second ring outside is closely coated by said first ring, and its cross section is c-shaped, and has the second external sealed face and second inner sealing surface;
Above-mentioned two rings link into an integrated entity and week one circumferential openings are arranged laterally along ring;
Also comprise metal spring, said metal spring is located on the inboard of said second ring and is compressed by said second ring.
2. seal ring according to claim 1 is characterized in that: said first ring is silver, and said second ring is inconel 600, and the material that said metal spring adopts is the inconel 750 that is different from second ring.
3. seal ring according to claim 2 is characterized in that: the combination of these three kinds of materials has formed stable sealing configuration, and exerting pressure each other with spring between first ring encircles with second helps compensating and tamping the tiny flaw of sealing surfaces.
4. seal ring according to claim 2 is characterized in that: must contain chromium and contain a spot of cobalt in inconel 750 materials that the metal spring that coats in second ring adopts.
5. according to any the described seal ring in the claim 1 to 3, it is characterized in that:
Said metal spring is a Monolithic spring, and the centre has only a solder joint, and/or,
Said first ring has only a solder joint, and/or,
Said second ring has only a solder joint.
6. according to any the described seal ring in the claim 1 to 3, it is characterized in that: the circumferential openings position of said first ring is corresponding fully with the circumferential openings position of second ring, and is whole c-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200343323U CN202176712U (en) | 2011-02-01 | 2011-02-01 | C-shaped cladding sealing ring with built-in spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200343323U CN202176712U (en) | 2011-02-01 | 2011-02-01 | C-shaped cladding sealing ring with built-in spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176712U true CN202176712U (en) | 2012-03-28 |
Family
ID=45866590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200343323U Expired - Lifetime CN202176712U (en) | 2011-02-01 | 2011-02-01 | C-shaped cladding sealing ring with built-in spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176712U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168757A (en) * | 2011-02-01 | 2011-08-31 | 宁波天生密封件有限公司 | C-shaped cladding sealing ring of built-in spring and manufacturing method thereof |
| CN103174836A (en) * | 2013-03-14 | 2013-06-26 | 自贡鑫剑密封科技有限公司 | Graphite packing loop and seal assembly thereof |
| CN103594125A (en) * | 2013-11-27 | 2014-02-19 | 中科华核电技术研究院有限公司 | Sealing ring used for reactor pressure vessel |
| CN103745756A (en) * | 2013-12-23 | 2014-04-23 | 宁波天生密封件有限公司 | Production process of O-shaped seal ring of nuclear reactor pressure vessel and products thereof |
| CN104675999A (en) * | 2015-03-13 | 2015-06-03 | 宁波天生密封件有限公司 | Sealing member for explosion valve and sealing structure thereof |
| CN106522872A (en) * | 2016-12-26 | 2017-03-22 | 隆学武 | Rubber barrel with metal sealing rings, packer and bridge plug |
| CN117145962A (en) * | 2023-10-30 | 2023-12-01 | 沈阳精航科技有限公司 | Method for improving deformation elasticity of fluid seal C-shaped sealing ring |
-
2011
- 2011-02-01 CN CN2011200343323U patent/CN202176712U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168757A (en) * | 2011-02-01 | 2011-08-31 | 宁波天生密封件有限公司 | C-shaped cladding sealing ring of built-in spring and manufacturing method thereof |
| CN103174836A (en) * | 2013-03-14 | 2013-06-26 | 自贡鑫剑密封科技有限公司 | Graphite packing loop and seal assembly thereof |
| CN103594125A (en) * | 2013-11-27 | 2014-02-19 | 中科华核电技术研究院有限公司 | Sealing ring used for reactor pressure vessel |
| CN103745756A (en) * | 2013-12-23 | 2014-04-23 | 宁波天生密封件有限公司 | Production process of O-shaped seal ring of nuclear reactor pressure vessel and products thereof |
| CN104675999A (en) * | 2015-03-13 | 2015-06-03 | 宁波天生密封件有限公司 | Sealing member for explosion valve and sealing structure thereof |
| CN104675999B (en) * | 2015-03-13 | 2018-02-09 | 宁波天生密封件有限公司 | Explosive valve seal and its sealing structure |
| CN106522872A (en) * | 2016-12-26 | 2017-03-22 | 隆学武 | Rubber barrel with metal sealing rings, packer and bridge plug |
| CN117145962A (en) * | 2023-10-30 | 2023-12-01 | 沈阳精航科技有限公司 | Method for improving deformation elasticity of fluid seal C-shaped sealing ring |
| CN117145962B (en) * | 2023-10-30 | 2024-01-09 | 沈阳精航科技有限公司 | Method for improving deformation elasticity of fluid seal C-shaped sealing ring |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |
|
| CX01 | Expiry of patent term |