CN100424389C - Processing technology for interference connection between butterfly gate gasket and valve body - Google Patents
Processing technology for interference connection between butterfly gate gasket and valve body Download PDFInfo
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- CN100424389C CN100424389C CNB2006101526448A CN200610152644A CN100424389C CN 100424389 C CN100424389 C CN 100424389C CN B2006101526448 A CNB2006101526448 A CN B2006101526448A CN 200610152644 A CN200610152644 A CN 200610152644A CN 100424389 C CN100424389 C CN 100424389C
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- valve
- valve body
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- seals
- interference
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Abstract
The invention relates to a butterfly valve sealing ring and valve interference connection, wherein it comprises: a, transmitting the valve to the anneal furnace to be heated uniformly, the temperature is controlled at 240-270Deg. C, using casting linear factor to calculate the diameter D of valve body as D= d*10*10<SUP>-6</SUP>*(t-t<SUB>0</SUB>; the interference valve is one thousand of the aperture of valve, while the interference space between valve and valve sealing is that reduce interference valve from D, d is inner aperture of valve at 99% of outer aperture, t is heating temperature, t0 is indoor temperature; b, putting valve sealing ring into inner chamber, uniformly approaching the valve sealing ring to the bottom of valve; c, using clamper to uniformly compress down the valve sealing ring, to contact the valve ring; d, when the valve body reaches normal temperature, detaching the clamper from rotor to finish every part of valve sealing ring.
Description
Technical field
The present invention relates to a kind of interference fit joint processing technology, relate in particular to a kind of seal ring of large-diameter butterfly valve and butterfly valve seal circle and the valve body interference fit joint processing technology that valve body adopts interference fit joint.
Background technique
At present, the seal form manual, electronic, hydraulic butterfly valve that is widely used in water power plant, thermal power station, metallurgical system, town water supply and the pipe network improving system mostly is rubber ring to eyelet pairing use.General valve seal loop material mostly is stainless steel coil.Valve seals and valve body connecting mode are to bore more unthreaded hole on the valve body endless belt, bore, attack the tapped hole of respective numbers on valve seals, then with the sealing of screw attachment O ring.This conventional structure is no doubt fine, and the easy corrosion of screw is aging, not quick detachable, complex structure but in use exist, and makes life of valve shorten, and manufacture cost such as increases at shortcoming.As adopt welding manner connect to be about to valve seals to be welded in the valve body on the endless belt, but the weldability of stainless steel and cast iron is bad, even adopt special welding rod welding, be applied to that effect neither be very desirable on the big like this valve, and this welding rod is somewhat expensive to make again that undoubtedly the valve manufacture cost increases, and simultaneously also there are a lot of shortcomings in use this structure, as the easy corrosion of weld bond, come off, seepage, thereby the sealability of valve is reduced, shorten working life etc.As everyone knows, interference fit joint is widely used in mechanical industry, and is of common occurrence.But being applied to diameter does not also have on the big specification butterfly valve body more than 2 meters, valve seals.Because big like this valve, its valve seals and valve body adopt interference fit, magnitude of interference much suitable but be crucial.Magnitude of interference is big, and assembling difficulty, valve body have danger, the valve seals that splits that rise that the possibility of having been bound round drum is arranged.Magnitude of interference is little, though be easy to assembling, but it is not enough that power is held in the interference between valve body and the valve seals tightly, thereby when the fine finishing valve seals its interference hold tightly make every effort to overcome clothes not cutting force cause play, simultaneously butterfly plate in switching process because the stressed big generation that causes its loosening phenomenon of valve seals.
Summary of the invention
The invention provides a kind of butterfly valve seal circle and valve body interference fit joint processing technology for solving the problems of the technologies described above, purpose is the working life of improving large bore valves, reduces cost.
Butterfly valve seal circle and valve body interference fit joint processing technology in order to achieve the above object, comprise the steps: a, valve body is transported to annealing kiln heat, make its thermally equivalent, temperature is controlled at 240-270 ℃, calculates bore D=d * 10 * 10 that valve body expands and increases with the cast iron linear expansion coeffcient
-6* (t-t
0), magnitude of interference is a thousandth of valve aperture, and the matching gap of valve body and valve seals is that D deducts magnitude of interference during this temperature, and wherein d is that bore is 99% of the outer bore of valve body in the valve body, and t is a heating-up temperature, t
0Be room temperature; B, valve seals is kept flat into the valve body atrium,, make valve seals equably near valve body endless belt bottom along the circumferential symmetry of valve body; C, valve seals is evenly depressed, itself and valve body endless belt are fitted fully with clamp; D, when treating that valve body is reduced to normal temperature, clamp is unloaded favourable turn add each one of workshop fine finishing valve seals internal diameter.
Advantageous effect of the present invention: adopt processing technology large-diameter butterfly valve valve seals of the present invention both without screw attachment on valve body, also valve seals need not be welded on the valve body, but adopt the interference mode to connect.Reduce cost of production, increased the working life of large-diameter butterfly valve simultaneously.This interference mode connects has also saved the O RunddichtringO, and its sealing is to realize sealing by interference fit fully, and no matter the productivity effect height is leakage test, or Shell test has all reached the requirement of GB/T13927A level.
Embodiment
Embodiment 1
Butterfly valve seal circle and valve body interference fit joint processing technology, comprise the steps: a, be that the valve body of 2500mm is transported to annealing kiln and heated outer bore, make its thermally equivalent, temperature is controlled at 240 ℃, room temperature is 5 ℃, calculates bore D=2475 * 10 * 10 that valve body expands and increases with the cast iron linear expansion coeffcient
-6* (240-5), magnitude of interference is 2.5mm, the matching gap of valve body and valve seals is 3.32mm during this temperature; B, valve seals is kept flat into the valve body atrium,, make valve seals equably near valve body endless belt bottom along the circumferential symmetry of valve body; C, valve seals is evenly depressed, itself and valve body endless belt are fitted fully with clamp; D, when treating that valve body is reduced to normal temperature, clamp is unloaded favourable turn add each one of workshop fine finishing valve seals internal diameter.
Embodiment 2
Bore is 3000mm outside the valve body in embodiment 1, and temperature is controlled at 255 ℃, and room temperature is 20 ℃, calculates bore D=2970 * 10 * 10 that valve body expands and increases with the cast iron linear expansion coeffcient
-6* (255-20), magnitude of interference is 3mm, the matching gap of valve body and valve seals is 3.98mm during this temperature; Other is with embodiment 1.
Embodiment 3
Bore is 2000mm outside the valve body in embodiment 1, and temperature is controlled at 255 ℃, and room temperature is 5 ℃, calculates bore D=1980 * 10 * 10 that valve body expands and increases with the cast iron linear expansion coeffcient
-6* (255-5), magnitude of interference is 2mm, the matching gap of valve body and valve seals is 2.96mm during this temperature; Other is with embodiment 1.
Embodiment 4
Bore is 3500mm outside the valve body in embodiment 1, and temperature is controlled at 270 ℃, and room temperature is 10 ℃, calculates bore D=3465 * 10 * 10 that valve body expands and increases with the cast iron linear expansion coeffcient
-6* (270-10), magnitude of interference is 3.5mm, the matching gap of valve body and valve seals is 5.51mm during this temperature; Other is with embodiment 1.
Claims (1)
1. butterfly valve seal circle and valve body interference fit joint processing technology is characterized in that comprising the steps:
A, valve body is transported to annealing kiln heat, make the valve body thermally equivalent, temperature is controlled at 240-270 ℃, calculates bore D=d * 10 * 10 that valve body expands and increases with the cast iron linear expansion coeffcient
-6* (t-t
0), magnitude of interference is a thousandth of the outer bore of valve body, and the matching gap of valve body and valve seals is that D deducts magnitude of interference during this temperature, and wherein d is that bore is 99% of the outer bore of valve body in the valve body, and t is a heating-up temperature, t
0Be initial temperature;
B, valve seals is kept flat into the valve body atrium,, make valve seals equably near valve body endless belt bottom along the circumferential symmetry of valve body;
C, valve seals is evenly depressed, valve seals and valve body endless belt are fitted fully with clamp;
D, when treating that valve body is reduced to normal temperature, clamp is unloaded favourable turn add each one of workshop fine finishing valve seals internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101526448A CN100424389C (en) | 2006-09-26 | 2006-09-26 | Processing technology for interference connection between butterfly gate gasket and valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101526448A CN100424389C (en) | 2006-09-26 | 2006-09-26 | Processing technology for interference connection between butterfly gate gasket and valve body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1920356A CN1920356A (en) | 2007-02-28 |
| CN100424389C true CN100424389C (en) | 2008-10-08 |
Family
ID=37778144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101526448A Expired - Fee Related CN100424389C (en) | 2006-09-26 | 2006-09-26 | Processing technology for interference connection between butterfly gate gasket and valve body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100424389C (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB985164A (en) * | 1963-03-01 | 1965-03-03 | Normalair Ltd | Improvements in or relating to butterfly valves |
| US3834663A (en) * | 1971-12-09 | 1974-09-10 | Jamesbury Corp | Metal seat butterfly valve |
| CN85103174B (en) * | 1985-04-24 | 1987-07-01 | 黑龙江省机械工业研究所 | Super hard material used on sealing surface of valve |
| CN2104350U (en) * | 1991-05-09 | 1992-05-13 | 沈阳变压器厂 | valve for transformer |
| CN2190720Y (en) * | 1993-12-30 | 1995-03-01 | 郭欲平 | Transformer butterfly valve |
| CN2369218Y (en) * | 1999-04-21 | 2000-03-15 | 中国人民解放军第五七一九工厂阀门分厂 | Standard orifice assembly |
| CN2370231Y (en) * | 1999-05-19 | 2000-03-22 | 杨绍贵 | Self sealing eccentric butterfly valve |
| CN2531194Y (en) * | 2002-04-02 | 2003-01-15 | 苏州实得企业发展有限公司 | Diaphragm valve |
-
2006
- 2006-09-26 CN CNB2006101526448A patent/CN100424389C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB985164A (en) * | 1963-03-01 | 1965-03-03 | Normalair Ltd | Improvements in or relating to butterfly valves |
| US3834663A (en) * | 1971-12-09 | 1974-09-10 | Jamesbury Corp | Metal seat butterfly valve |
| CN85103174B (en) * | 1985-04-24 | 1987-07-01 | 黑龙江省机械工业研究所 | Super hard material used on sealing surface of valve |
| CN2104350U (en) * | 1991-05-09 | 1992-05-13 | 沈阳变压器厂 | valve for transformer |
| CN2190720Y (en) * | 1993-12-30 | 1995-03-01 | 郭欲平 | Transformer butterfly valve |
| CN2369218Y (en) * | 1999-04-21 | 2000-03-15 | 中国人民解放军第五七一九工厂阀门分厂 | Standard orifice assembly |
| CN2370231Y (en) * | 1999-05-19 | 2000-03-22 | 杨绍贵 | Self sealing eccentric butterfly valve |
| CN2531194Y (en) * | 2002-04-02 | 2003-01-15 | 苏州实得企业发展有限公司 | Diaphragm valve |
Non-Patent Citations (6)
| Title |
|---|
| 气动排渣蝶阀的研制. 张逸芳.流体机械，第24卷第5期. 1996 |
| 气动排渣蝶阀的研制. 张逸芳.流体机械，第24卷第5期. 1996 * |
| 热压合过盈量的简化计算. 刘逸民.设备管理与维修，第10期. 1999 |
| 热压合过盈量的简化计算. 刘逸民.设备管理与维修，第10期. 1999 * |
| 过盈联接的公差配合表改进探讨. 刘逸民.矿山机械，第1期. 2001 |
| 过盈联接的公差配合表改进探讨. 刘逸民.矿山机械，第1期. 2001 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1920356A (en) | 2007-02-28 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081008 Termination date: 20130926 |