CN202301937U - Thin-walled flange flat groove radial dual sealing structure for complex working condition - Google Patents
Thin-walled flange flat groove radial dual sealing structure for complex working condition Download PDFInfo
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- CN202301937U CN202301937U CN 201120358131 CN201120358131U CN202301937U CN 202301937 U CN202301937 U CN 202301937U CN 201120358131 CN201120358131 CN 201120358131 CN 201120358131 U CN201120358131 U CN 201120358131U CN 202301937 U CN202301937 U CN 202301937U
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Abstract
The utility model provides a thin-walled flange flat trough radial dual sealing structure for a complex working condition. A circular groove is reserved on an outer lateral surface at the top end of a lower flange which contacts an upper flange, and is a sealing groove for assembling a rubber sealing element. Another circular groove is also reserved on the end face of the lower flange which contacts the upper flange, and is a flat groove for assembling a gasket. The rubber sealing element is arranged in the sealing groove for assembling the rubber sealing element, and has the compression amount of 25 to 40 percent. The gasket is arranged in the flat groove for assembling a polytetrafluoroethylene gasket, and has a shape which is matched with that of the flat groove, a height which is 0.5 to 1.0mm more than the depth of the flat groove and a volume filling rate of 75 to 100 percent in the flat groove. The end face of the upper or lower flange is 8 to 18mm thick. According to the structure, the flanges are deformed in the using process of the rubber sealing element within a wide temperature range of low temperature to the high temperature limit of the rubber sealing element, and the production of redundant substances is avoided when the rubber sealing element is used for sealing at the high temperature limit of the rubber sealing element after contacting a highly-corrosive medium.
Description
Technical field
The utility model relates to the sealing configuration under a kind of complex working condition condition, is specifically related to a kind of thin-walled type flange that is used for the complex working condition condition radially double sealing structure of rising as high as the banks.
Background technique
Rubber seal is simple with its sealing configuration form, sealing reliability is high and receive application widely.Under the prerequisite that requires to allow in sealing technique, rubber seal always is first-selected scheme for sealing.Usually, according to requirements such as serviceability temperature, Environmental Conditions, sealing loads, select corresponding rubber seal for use, flange facing reaches tight seamless link about requiring simultaneously, thereby guarantees the reliable sealing requirement.Yet, under some particular case, owing to receive the restriction of assembly space constraint and loss of weight requirement; Can't design large-scale thick and heavy sealing configuration, require the flange design of sealing configuration must be in light weight, thin thickness, assembling be flexible, this kind sealing configuration can produce distortion in assembly process; And in the high temperature using process, also can produce distortion; These distortion all cause flange facing increases of cracking, therefore, and the conventional seals structural design of use rubber seal; Can't satisfy the sealing usage requirement, need carry out and satisfy sealing is used about rubber seal lightweight, assembling flexibly and the sealing configuration research that produces distortion in the using process.On the other hand, the General Purpose Rubber material influences the normal use of exquisite systems such as valve contacting the back with strong corrosive medium at elevated-temperature seal using process meeting generation fifth wheel.
Summary of the invention
The purpose of the utility model provides a kind of thin-walled type flange that is used for the complex working condition condition radially double sealing structure of rising as high as the banks, and its rubber seal produces flange distortion and rubber seal and contacts the back with strong corrosive media and after its limit high temperature lower seal uses, do not produce fifth wheel in the wide temperature territory using process of low temperature to its limit high temperature.Described flange distortion comes from the distortion that produces in distortion that normal temperature assembling produces and the elevated-temperature seal using process, and the distortion that the normal temperature assembling produces makes up and down the flanged surface outside maximum of cracking reach 0.2mm; The distortion that produces in the elevated-temperature seal using process makes the flange inside maximum of cracking reach 2.5mm, and the sealing surface of placing the rubber seal place maximum of cracking reaches 1.5mm.
The described a kind of thin-walled type flange that is used for the complex working condition condition of the utility model radially double sealing structure of rising as high as the banks; Wherein lower flange embeds in the upper flange; Block lower flange through the kink ring again, several parts that apply the flange pretightening force through circumferential setting pass being fastenedly connected of kink ring and the upper flange last lower flange of realization simultaneously; It is offering annular groove on the lower flange top outer side surface of upper flange contact, be the seal groove of assembling rubber seal; On the lower flange end face of upper flange contact, also offer annular groove, be rising as high as the banks of assembling pad; In the seal groove of assembling rubber seal, place rubber seal, the decrement of this rubber seal is 25%～40%; The pad that placement matches with its shape in assembling the rising as high as the banks of teflon gasket, the height of this pad is greater than the depth value 0.5～1.0mm that rises as high as the banks, and the volume fill factor of teflon gasket in rising as high as the banks is 75～100%; The end surface thickness of described upper flange or lower flange is at 8mm～18mm.
Aforesaid a kind of thin-walled type flange that is used for the complex working condition condition radially double sealing structure of rising as high as the banks, it is described to be placed on rubber seal material selection fluorine rubber or fluoroether rubber or the ethylene propylene rubber in the seal groove of assembling rubber seal.
Aforesaid a kind of thin-walled type flange that is used for the complex working condition condition radially double sealing structure of rising as high as the banks, its described upper flange or lower flange are selected steel or aluminium material for use.
Aforesaid a kind of thin-walled type flange that is used for the complex working condition condition radially double sealing structure of rising as high as the banks, its described parts that apply the flange pretightening force are screw bolt and nut.
The effect of the utility model is:
The described flange that is used under the complex working condition condition of the utility model radially double sealing structure of rising as high as the banks; Adopt flange double sealing structural type; Inner seal adopts teflon gasket; Rubber seal is adopted in outer side sealing; Solved the sealing problem of strong corrosive medium environment lower seal structure under texturizing condition, said distortion comes from the distortion that produces in distortion that normal temperature assembling produces and the elevated-temperature seal using process, and wherein the distortion that produces of normal temperature assembling makes up and down the flanged surface outside maximum of cracking reach 0.2mm; The distortion that produces in the elevated-temperature seal using process makes the flange inside maximum of cracking reach 2.5mm, and the sealing surface of placing the rubber seal place maximum of cracking reaches 1.5mm.
The utility model has carried out above-mentioned sealing configuration flange in the wide temperature territory using process of-60 ℃～rubber seal limit high temperature respectively and has produced under the texturizing condition and rubber seal contact the back and simulates certification test in the sealing of its limit high temperature use with strong corrosive media; Test result shows that sealing configuration does not leak, and does not produce fifth wheel.Wherein, the maximum of cracking outside the flanged surface about the distortion of normal temperature assembling generation makes reaches 0.2mm; The distortion that produces in the elevated-temperature seal using process makes the flange inside maximum of cracking reach 2.5mm, and the sealing surface of placing the rubber seal place maximum of cracking reaches 1.5mm.
Description of drawings
Fig. 1 is the described a kind of flange that is used under the complex working condition condition of the utility model radially double sealing structural representation of rising as high as the banks;
Among the figure: the 1-upper flange; The 2-lower flange; Rising as high as the banks of 3-assembling teflon gasket; The seal groove of 4-assembling rubber seal; 5-applies the parts of flange pretightening force; 6-kink ring.
Embodiment
Rising as high as the banks radially below in conjunction with accompanying drawing and specific embodiment to the described a kind of flange that is used under the complex working condition condition of the utility model, the double sealing structure further describes.
Embodiment 1
As shown in Figure 1; A kind of flange that is used under the complex working condition condition radially double sealing structure of rising as high as the banks; Wherein lower flange 2 embeds in the upper flange 1; Block lower flange 2 through kink ring 6 again, several parts 5 (screw bolt and nut) that apply the flange pretightening force through circumferential setting pass being fastenedly connected of kink ring 6 and the upper flange 1 last lower flange of realization simultaneously.The material of upper flange is 2A12, and the upper flange end surface thickness is 18mm; The material of lower flange is 1Cr18Ni9Ti, and the lower flange end surface thickness is 8mm.
On the lower flange 2 top outer side surfaces of upper flange 1 contact, offering annular groove, be the seal groove 4 of assembling rubber seal, the width of seal groove 4 is 2.25mm, and groove depth is 4mm.In the seal groove 4 of assembling rubber seal, place the fluororubber O shape Sealing of Φ 3, this rubber seal decrement is 25%;
On lower flange 2 end faces of upper flange 1 contact, also offering annular groove, for the assembling pad rise as high as the banks 3, groove width is 2mm, groove depth is 1mm.At the pad that placement matches with its shape in 3 of rising as high as the banks of assembling teflon gasket, the height 1.5mm of this pad, width are 1mm.The volume fill factor of teflon gasket in rising as high as the banks is 75%.
The above-mentioned flange that is used under the complex working condition condition is risen as high as the banks, and radially double sealing structure assembly process is following: teflon gasket is installed on rises as high as the banks 3; Fluorine rubber seal element is installed in the seal groove 4, places the kink ring at the lower flange place, adopt torque spanner then; Each bolt is tightened symmetrically; Divide 4～5 times the Bolt Tightening Force square to be added to 20N.m, then, along the circumferential direction calibrate moment twice.Adopt feeler gauge, recording maximal clearance, the lower flange outside is 0.2mm.
The radially double sealing structure of rising as high as the banks to above-mentioned assembling; Carried out-60 ℃ of leakage tests respectively, the leakage test under (contact pressure the is 0.5MPa) condition that contacts 150 hours at 40 ℃ with the uns-dimethylhydrazine gas phase media, with normal temperature after the uns-dimethylhydrazine gas phase media contacts, low temperature-20 ℃ and high temperature 355 ℃ of (test periods 10 minutes; Test pressure 0.85MPa) leakage test, test result shows: in above-mentioned process of the test, all do not leak.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 1.83mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 0.92mm, does not have fifth wheel in the cavity of test frock.
As a comparison; To the single track sealing configuration (other condition is with the above) that does not comprise that the assembling teflon gasket is risen as high as the banks; Carried out corresponding leakage test respectively, test result shows :-60 ℃ of leakage test processes are leaked, normal temperature, low temperature seal process of the test after medium contact process and the medium contact are not leaked, 355 ℃ of leakage test processes of high temperature are leaked.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 1.82mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 0.91mm, in the test frock cavity black paint shape thing is arranged.
In addition as a comparison; Fluorine rubber seal element in the above-mentioned single track sealing configuration is replaced with hollow metal O shape ring; The width of seal groove is designed to 4.2mm; Groove depth is designed to 2.25mm, and placing cross-section size in this groove is the hollow metal O-ring packing of Φ 3, and other condition is with the above; Carried out corresponding leakage test respectively, test result shows: normal temperature, the low temperature seal process of the test after-60 ℃ of leakage tests, medium contact process and media contact do not leaked, 355 ℃ of leakage test processes of high temperature are leaked.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 1.82mm in test flange inside, and the sealing surface of placing the Sealing place cracks and reaches 0.9mm, no fifth wheel in the test frock cavity.
Embodiment 2
As shown in Figure 1; A kind of flange that is used under the complex working condition condition radially double sealing structure of rising as high as the banks; Wherein lower flange 2 embeds in the upper flange 1; Block lower flange 2 through kink ring 6 again, several parts 5 (screw bolt and nut) that apply the flange pretightening force through circumferential setting pass being fastenedly connected of kink ring 6 and the upper flange 1 last lower flange of realization simultaneously.The material of upper flange is 5A06, and the upper flange end surface thickness is 16mm; The material of lower flange is 1Cr18Ni9Ti, and the lower flange end surface thickness is 8mm.
On the lower flange 2 top outer side surfaces of upper flange 1 contact, offering annular groove, be the seal groove 4 of assembling rubber seal, the width of seal groove 4 is 1.8mm, and groove depth is 4mm.In the seal groove 4 of assembling rubber seal, place the fluoroether rubber O-ring seals of Φ 3, the decrement of this rubber seal is 40%.
On lower flange 2 end faces of upper flange 1 contact, also offering annular groove, for the assembling pad rise as high as the banks 3, groove width is 2mm, groove depth is 1mm.At the pad that placement matches with its shape in 3 of rising as high as the banks of assembling teflon gasket, the height 2.0mm of this pad, width are 1mm.The volume fill factor of teflon gasket in rising as high as the banks is 100%.
The above-mentioned flange that is used under the complex working condition condition is risen as high as the banks, and radially double sealing structure assembly process is following: teflon gasket is installed on rises as high as the banks 3; The fluoroether rubber O-ring seals is installed in the seal groove 4, places the kink ring at the lower flange place, adopt torque spanner then; Each bolt is tightened symmetrically; Divide 4～5 times the Bolt Tightening Force square to be added to 20N.m, then, along the circumferential direction calibrate moment twice.Adopt feeler gauge, recording maximal clearance, the lower flange outside is 0.2mm.
The radially double sealing structure of rising as high as the banks to above-mentioned assembling; Carried out-60 ℃ of leakage tests respectively, the leakage test under (contact pressure the is 0.4MPa) condition that contacts 150 hours at 40 ℃ with the dinitrogen tetroxide gas phase media, with normal temperature after the dinitrogen tetroxide gas phase media contacts, low temperature-20 ℃ and high temperature 360 ℃ of (test periods 10 minutes; Test pressure 0.9MPa) leakage test, test result shows: in above-mentioned process of the test, all do not leak.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.55mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.52mm, does not have fifth wheel in the cavity of test frock.
Embodiment 3
As shown in Figure 1; A kind of flange that is used under the complex working condition condition radially double sealing structure of rising as high as the banks; Wherein lower flange 2 embeds in the upper flange 1; Block lower flange 2 through kink ring 6 again, several parts 5 (screw bolt and nut) that apply the flange pretightening force through circumferential setting pass being fastenedly connected of kink ring 6 and the upper flange 1 last lower flange of realization simultaneously.The material of upper flange is 2A14, and the upper flange end surface thickness is 16.5mm; The material of lower flange is 1Cr18Ni9Ti, and the lower flange end surface thickness is 8mm.
On the lower flange 2 top outer side surfaces of upper flange 1 contact, offering annular groove, be the seal groove 4 of assembling rubber seal, the width of seal groove 4 is 2mm, and groove depth is 4mm.In the seal groove 4 of assembling rubber seal, place the ethylene propylene rubber O-ring seals of Φ 3, the decrement of this rubber seal is 33.3%.
On lower flange 2 end faces of upper flange 1 contact, also offering annular groove, for the assembling pad rise as high as the banks 3, groove width is 2mm, groove depth is 1mm.At the pad that placement matches with its shape in 3 of rising as high as the banks of assembling teflon gasket, the height 1.8mm of this pad, width are 1mm, and the volume fill factor of teflon gasket in rising as high as the banks is 90%.
The above-mentioned flange that is used under the complex working condition condition is risen as high as the banks, and radially double sealing structure assembly process is following: teflon gasket is installed on rises as high as the banks 3; The ethylene propylene rubber O-ring seals is installed in the seal groove 4, places the kink ring at the lower flange place, adopt torque spanner then; Each bolt is tightened symmetrically; Divide 4～5 times the Bolt Tightening Force square to be added to 20N.m, then, along the circumferential direction calibrate moment twice.Adopt feeler gauge, recording maximal clearance, the lower flange outside is 0.2mm.
The radially double sealing structure of rising as high as the banks to above-mentioned assembling; Carried out-60 ℃ of leakage tests respectively, the leakage test under (contact pressure the is 0.5MPa) condition that contacts 150 hours at 40 ℃ with the uns-dimethylhydrazine gas phase media, with normal temperature after the uns-dimethylhydrazine gas phase media contacts, low temperature-20 ℃ and high temperature 345 ℃ of (test periods 10 minutes; Test pressure 0.85MPa) leakage test, test result shows: in above-mentioned process of the test, all do not leak.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.2mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.25mm, does not have fifth wheel in the cavity of test frock.
Claims (4)
1. a thin-walled type flange that is used for the complex working condition condition radially double sealing structure of rising as high as the banks; Wherein lower flange (2) embeds in the upper flange (1); Block lower flange (2) through kink ring (6) again; Several parts (5) that apply the flange pretightening force through circumferential setting pass being fastenedly connected of lower flange in kink ring (6) and upper flange (1) realization simultaneously; It is characterized in that: on lower flange (2) the top outer side surface of upper flange (1) contact, offering annular groove, be the seal groove (4) of assembling rubber seal; On lower flange (2) end face of upper flange (1) contact, also offer annular groove, be rise as high as the banks (3) of assembling pad; The assembling rubber seal seal groove (4) in the placement rubber seal, this rubber seal decrement 25%～40%; In rise as high as the banks (3) of assembling teflon gasket, place the pad that matches with its shape, the height of this pad is greater than the depth value 0.5～1.0mm that rises as high as the banks, and the volume fill factor of teflon gasket in rising as high as the banks is 75～100%; The end surface thickness of described upper flange (1) or lower flange (2) is at 8mm～18mm.
2. a kind of thin-walled type flange that is used for the complex working condition condition according to claim 1 radially double sealing structure of rising as high as the banks is characterized in that: rubber seal material selection fluorine rubber or fluoroether rubber or ethylene propylene rubber in the described seal groove (4) that is placed on the assembling rubber seal.
3. a kind of thin-walled type flange that is used for the complex working condition condition according to claim 1 radially double sealing structure of rising as high as the banks, it is characterized in that: described upper flange (1) or lower flange (2) are selected steel or aluminium material for use.
4. a kind of thin-walled type flange that is used for the complex working condition condition according to claim 1 radially double sealing structure of rising as high as the banks, it is characterized in that: the described parts (5) that apply the flange pretightening force are screw bolt and nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120358131 CN202301937U (en) | 2011-09-22 | 2011-09-22 | Thin-walled flange flat groove radial dual sealing structure for complex working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120358131 CN202301937U (en) | 2011-09-22 | 2011-09-22 | Thin-walled flange flat groove radial dual sealing structure for complex working condition |
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| Publication Number | Publication Date |
|---|---|
| CN202301937U true CN202301937U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120358131 Expired - Lifetime CN202301937U (en) | 2011-09-22 | 2011-09-22 | Thin-walled flange flat groove radial dual sealing structure for complex working condition |
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| CN (1) | CN202301937U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367898A (en) * | 2011-09-22 | 2012-03-07 | 航天材料及工艺研究所 | Thin-wall flange flat-groove dual seal structure used under complex working condition and application thereof |
| CN109650674A (en) * | 2019-01-30 | 2019-04-19 | 沈阳工业大学 | A kind of circulation type methane matrix membrane biofilm reactor and sewage water treatment method |
-
2011
- 2011-09-22 CN CN 201120358131 patent/CN202301937U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367898A (en) * | 2011-09-22 | 2012-03-07 | 航天材料及工艺研究所 | Thin-wall flange flat-groove dual seal structure used under complex working condition and application thereof |
| CN102367898B (en) * | 2011-09-22 | 2013-03-20 | 航天材料及工艺研究所 | Thin-wall flange flat-groove dual seal structure used under complex working condition and application thereof |
| CN109650674A (en) * | 2019-01-30 | 2019-04-19 | 沈阳工业大学 | A kind of circulation type methane matrix membrane biofilm reactor and sewage water treatment method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Bai Xiangyun Inventor after: Wang Lifeng Inventor after: Wang Bangwu Inventor after: Wu Fudi Inventor after: Mu Han Inventor after: Niu Baolin Inventor before: Bai Xiangyun Inventor before: Wang Lifeng Inventor before: Wang Bangwu Inventor before: Wu Fudi |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: BAI XIANGYUN WANG LIFENG WANG BANGWU WU FUDI TO: BAI XIANGYUN WANG LIFENG WANG BANGWU WU FUDI MU HAN NIU BAOLIN |
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| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
|
| CX01 | Expiry of patent term |