CN203571075U - Sealing pair structure of triple eccentric metal sealing butterfly valve - Google Patents
Sealing pair structure of triple eccentric metal sealing butterfly valve Download PDFInfo
- Publication number
- CN203571075U CN203571075U CN201320725096.9U CN201320725096U CN203571075U CN 203571075 U CN203571075 U CN 203571075U CN 201320725096 U CN201320725096 U CN 201320725096U CN 203571075 U CN203571075 U CN 203571075U
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- Prior art keywords
- valve
- sealing
- butterfly
- valve seat
- pair structure
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- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 title claims abstract description 52
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 238000003825 pressing Methods 0.000 claims description 12
- 239000003381 stabilizer Substances 0.000 claims description 7
- 210000002421 cell wall Anatomy 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000003208 petroleum Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009428 plumbing Methods 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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Abstract
The utility model discloses a sealing pair structure of a triple eccentric metal sealing butterfly valve. The sealing pair structure of the triple eccentric metal sealing butterfly valve is widely applied to conducting medium flow cutting and throttling on industrial pipelines for metallurgy, electric power, petroleum chemical industry, water supply and drainage, municipal construction and the like with the medium temperature smaller than or equal to 425 degrees. The sealing pair structure is mainly composed of a valve body, a valve base, a butterfly plate, a sealing ring and a valve rod. An elastic supporting ring is additionally arranged between the valve base and an installation groove where the valve base is installed, the sealing ring on the butterfly plate and the valve base cannot produce leakage whether the sealing ring and the valve base are in the medium down-flow state or the reverse-flow state due to the fact that the elastic supporting ring elastically abuts against the valve base, the two-way sealing function is achieved, the valve base and the butterfly plate almost have no abrasion, and the more reliable sealing performance is achieved. In addition, the improved structure is simple in design, is not limited by the medium flow direction or influenced by the space position when installed, can be installed in any direction, and is convenient to install.
Description
Technical field
The utility model relates to butterfly valve technical field, particularly a kind of sealing pair structure of three eccentric metal seal butterfly valve.
Background technique
Metallic sealing butterfly valve is generally arranged in water supply and sewerage pipeline system, be mainly used in convection cell carry out cut-out and throttling action and be widely used in metallurgy, electric power, petrochemical industry and the plumbing of medium temperature≤425 ℃ and the industrial pipeline such as urban construction on.Normal two bias and the three eccentric sealed structural designs of adopting of sealing pair of known metallic sealing butterfly valve form, adopt the sealing pair of two eccentric structure butterfly valves to consist of butterfly plate metallic sealing section and U-shaped metal o-ring, this structure often causes valve leak when U-shaped metal o-ring resiliently deformable lost efficacy or butterfly plate bears back pressure; Adopt " sealing surface adjustable type three eccentric hard sealed flygates " that three eccentric structure butterfly valves are 201320112543.3 as disclosed China Patent No., its sealing pair consists of composite sheet seal ring and valve body metallic sealing section, when medium is following current state, more high sealing extruding is tighter for pressure medium, when medium is adverse current state, along with the increase of pressure medium, when the unit positive pressure between butterfly plate and valve seat is less than medium pressure, sealing starts to leak.Therefore,, in order to overcome above-mentioned defect, it is very necessary that the sealing pair of metallic sealing butterfly valve is carried out to structural improvement.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the defect of prior art and a kind of sealing pair structure of simple in structure, the reliable three eccentric metal seal butterfly valve of sealability is provided.
Technical problem of the present utility model is achieved through the following technical solutions:
A sealing pair structure for three eccentric metal seal butterfly valve, comprises valve body and is arranged on the medium runner in valve body, and the outlet end of this medium runner is provided with valve seat and opens and closes the butterfly plate of valve seat, between butterfly plate and valve seat, is provided with and makes the seal ring that sealing contacts; In described valve body, be also provided with the valve rod that connects butterfly plate, the valve body of described medium runner outlet end is provided with mounting groove, and the cell wall of this mounting groove is provided with groove; Described valve seat is arranged in this mounting groove, between this valve seat and mounting groove, is provided with elastic support ring; Described elastic support ring the inner is provided with extended stabilizer, and this extended stabilizer inserts in described groove, and elastic support ring outer end and valve seat push against mutually.
The valve body of described medium runner outlet end is provided with pressing plate outward, and this pressing plate is enclosed in described elastic support ring and valve seat in mounting groove.
Described butterfly plate is provided with described seal ring is fixed on to the butterfly plate pressing plate on butterfly plate.
The sealing cross section of described seal ring and valve seat is the oblique cone face that contacts with each other sealing, and the sealing cross section tapering a of described valve seat is 17 ° ~ 19 °.
Described valve body structure is two eccentric structures, is provided with in the axis hole center of valve rod and medium runner and is formed centrally throw of eccentric A on this valve body, is provided with in the axis hole center of valve rod and valve seat and is formed centrally throw of eccentric B on this valve body.
Described seal ring is to consist of corrosion resistant plate and graphite composite plate.
Described butterfly plate and the linkage structure of valve rod be butterfly plate with valve rod between be provided with the straight pin being connected.
Compared with prior art, the utility model is mainly to have additional elastic support ring between valve seat and the mounting groove of installation valve seat, and by elastic support ring, the elasticity of valve seat is pushed against to the seal ring and the valve seat that make on butterfly plate and no matter at medium following current state or adverse current state, all can not produce leakage, there is two way sealed function, and valve seat and butterfly plate are almost without wearing and tearing, there is more reliable sealability.Meanwhile, the structural design after improvement is simple, during installation, be not subject to MEDIA FLOW to restriction, be not subject to the impact of spatial position yet, can install in any direction, installation process is convenient.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model.
Fig. 2 is the C-C structure sectional view (broken section) of Fig. 1.
Embodiment
To the utility model embodiment, elaborate again by above-mentioned accompanying drawing below.
As shown in Figure 1 and Figure 2,1. valve body, 2. valve rod, 3. pressing plate, 4. elastic support ring, 41. extended stabilizers, 5. valve seat, 6. seal ring, 7. butterfly plate pressing plate, 8. butterfly plate, 9. mounting groove, 10. medium runner, 11. straight pins.
The sealing pair structure of three eccentric metal seal butterfly valve, is widely used in carrying out on the industrial pipelines such as metallurgy, electric power, petrochemical industry, plumbing and urban construction of medium temperature≤425 ℃ cut-out and the throttling of medium fluid.Its structure is mainly to consist of valve body 1, valve seat 5, butterfly plate 8, seal ring 6 and valve rod 2 etc.
In described valve body 1, be provided with the medium runner 10 of level circulation, and axis hole perpendicular media runner design, that install for valve rod 2, outlet end at medium runner 10 is provided with valve seat 5 and butterfly plate 8, between butterfly plate and valve seat, be provided with and make the seal ring 6 that sealing contact, valve rod 2 fix by two straight pins 11 and butterfly plate 8 and is driven butterfly plate rotation to realize valve seat 5 keyings.
The main pair eccentric structures that adopt of described valve body 1, be to be formed centrally throw of eccentric A in axis hole center in valve body 1 and medium runner 10, in axis hole center in valve body 1 and valve seat 5, be formed centrally another throw of eccentric B, the numerical value value of throw of eccentric A and throw of eccentric B is mainly adjusted according to valve design parameter, such as valve body 1 size, medium runner 10 outlet end sizes etc.
Described is provided with mounting groove 9 on the valve body 1 of medium runner 10 outlet end, this mounting groove be one without single cell wall mounting groove of outer side slot wall construction, on the inner side cell wall of this mounting groove 9, offer groove; Described valve seat 5 is arranged in this mounting groove 9, between valve seat and mounting groove, be also provided with elastic support ring 4, this elastic support ring the inner is provided with extended stabilizer 41, and extended stabilizer directly inserts in groove and forms fixing, elastic support ring 4 outer end elasticity are pushed against on valve seat 5, the resiliently deformable of valve seat by elastic support ring 4 automatically regulate and seal ring 6 between seal compression; The sealing cross-sectional structure of described valve seat 5 is oblique cone structure, and its tapering a is 17 ° ~ 19 °, generally suitable with 18 °; The outer pressing plate 3 that is also provided with of valve body 1 of described medium runner 10 outlet end, namely this pressing plate be arranged on mounting groove 9 without outside cell wall one side, by pressing plate 3, be about to elastic support ring 4 and valve seat 5 is all enclosed in mounting groove 9.
Described seal ring 6 is connected to one with butterfly plate by the butterfly plate pressing plate 7 of butterfly plate 8 end faces, and sealing circle 6 is consisted of corrosion resistant plate and graphite composite plate, and the cross section of seal ring 6 is also oblique cone face and is mutually sealed and matched with valve seat 5 sealing surfaces.
Working method of the present utility model is: when butterfly plate 8 drives from being closed to and opens gradually while doing spinning movement through valve rod 2,6 moments of seal ring on butterfly plate 8 and valve seat 5 sealing surfaces disengagings, can avoid the phase mutual friction between sealing pair; When butterfly plate 8 is during in buttoned-up status, medium fluid in medium runner 10 is entered by the entrance point of valve body 1, butterfly plate 8 be subject to pressure medium and move forward, be to move right shown in Fig. 1, now elastic support ring 4 produces outside radial elastic distortion, and the decrement between automatic regulating valve seat 5 and seal ring 6, avoid overcompression situation, reduce the friction between sealing pair; Medium fluid in medium runner 10 is entered by the outlet end of valve body 1, butterfly plate 8 be subject to pressure medium and move backward, be to be moved to the left shown in Fig. 1, between seal ring 6 and valve seat 5, produce gap, now elastic support ring 4 produces inside radial elastic distortion, gap width in supplementary valve seat 5 and seal ring 6, and make to be sealed and matched together between sealing pair, sealability is very reliable.
Claims (7)
1. the sealing pair structure of a three eccentric metal seal butterfly valve, comprise valve body (1) and be arranged on the medium runner (10) in valve body, the outlet end of this medium runner is provided with valve seat (5) and opens and closes the butterfly plate (8) of valve seat, between butterfly plate and valve seat, is provided with and makes the seal ring (6) that sealing contacts; In described valve body (1), be also provided with the valve rod (2) that connects butterfly plate (8), it is characterized in that the valve body (1) of described medium runner (10) outlet end is provided with mounting groove (9), the cell wall of this mounting groove is provided with groove; Described valve seat (5) is arranged in this mounting groove (9), is provided with elastic support ring (4) between this valve seat and mounting groove; Described elastic support ring the inner is provided with extended stabilizer (41), and this extended stabilizer inserts in described groove, and elastic support ring (4) outer end and valve seat (5) push against mutually.
2. the sealing pair structure of three eccentric metal seal butterfly valve according to claim 1, outside the valve body (1) of medium runner (10) outlet end described in it is characterized in that, be provided with pressing plate (3), this pressing plate is enclosed in described elastic support ring (4) and valve seat (5) in mounting groove (9).
3. the sealing pair structure of three eccentric metal seal butterfly valve according to claim 1 and 2, is characterized in that described butterfly plate (8) is provided with described seal ring (6) is fixed on to the butterfly plate pressing plate (7) on butterfly plate.
4. the sealing pair structure of three eccentric metal seal butterfly valve according to claim 1 and 2, it is characterized in that described seal ring (6) and the sealing cross section of valve seat (5) are the oblique cone face that contacts with each other sealing, the sealing cross section tapering a of described valve seat (5) is 17 ° ~ 19 °.
5. the sealing pair structure of three eccentric metal seal butterfly valve according to claim 1 and 2, it is characterized in that described valve body (1) structure is for two eccentric structures, on this valve body, be provided with in the axis hole center of valve rod (2) and medium runner (10) and be formed centrally throw of eccentric A, on this valve body (1), be provided with in the axis hole center of valve rod (2) and valve seat (5) and be formed centrally throw of eccentric B.
6. the sealing pair structure of three eccentric metal seal butterfly valve according to claim 1 and 2, is characterized in that described seal ring (6) is to consist of corrosion resistant plate and graphite composite plate.
7. the sealing pair structure of three eccentric metal seal butterfly valve according to claim 1 and 2, it is characterized in that described butterfly plate (8) and the linkage structure of valve rod (2) be butterfly plate with valve rod between be provided with the straight pin (11) being connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725096.9U CN203571075U (en) | 2013-11-18 | 2013-11-18 | Sealing pair structure of triple eccentric metal sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725096.9U CN203571075U (en) | 2013-11-18 | 2013-11-18 | Sealing pair structure of triple eccentric metal sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203571075U true CN203571075U (en) | 2014-04-30 |
Family
ID=50538807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320725096.9U Expired - Lifetime CN203571075U (en) | 2013-11-18 | 2013-11-18 | Sealing pair structure of triple eccentric metal sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203571075U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329475A (en) * | 2014-11-04 | 2015-02-04 | 无锡市亚迪流体控制技术有限公司 | Three-eccentric and bidirectional metal sealing butterfly valve |
| CN105156699A (en) * | 2015-09-21 | 2015-12-16 | 中船重工特种设备有限责任公司 | Seal-ring-bearing three-eccentric seal butterfly valve |
| CN105465384A (en) * | 2016-02-01 | 2016-04-06 | 无锡智能自控工程股份有限公司 | All-metal interlayer sealing ring and valve plate device applying same |
-
2013
- 2013-11-18 CN CN201320725096.9U patent/CN203571075U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329475A (en) * | 2014-11-04 | 2015-02-04 | 无锡市亚迪流体控制技术有限公司 | Three-eccentric and bidirectional metal sealing butterfly valve |
| CN105156699A (en) * | 2015-09-21 | 2015-12-16 | 中船重工特种设备有限责任公司 | Seal-ring-bearing three-eccentric seal butterfly valve |
| CN105465384A (en) * | 2016-02-01 | 2016-04-06 | 无锡智能自控工程股份有限公司 | All-metal interlayer sealing ring and valve plate device applying same |
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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: 20140430 |
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| CX01 | Expiry of patent term |