CN104455412B - Variable-section self-locking leakage prevention device for large opening of internal-pressure vessel - Google Patents
Variable-section self-locking leakage prevention device for large opening of internal-pressure vessel Download PDFInfo
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- CN104455412B CN104455412B CN201410661268.XA CN201410661268A CN104455412B CN 104455412 B CN104455412 B CN 104455412B CN 201410661268 A CN201410661268 A CN 201410661268A CN 104455412 B CN104455412 B CN 104455412B
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- sealing ring
- section
- variable cross
- groove
- variable
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- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J13/00—Covers or similar closure members for pressure vessels in general
- F16J13/02—Detachable closure members; Means for tightening closures
- F16J13/12—Detachable closure members; Means for tightening closures attached by wedging action by means of screw-thread, interrupted screw-thread, bayonet closure, or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
A variable-section self-locking leakage prevention device for a large opening of an internal-pressure vessel includes a flange flat cover. The bottom of the flange flat cover extends to form a variable-section seal ring which is of an axisymmetric short cylinder structure. The radial wall thickness of the variable-section seal ring decreases progressively from the root to the end of the variable-section seal ring. One end of the variable-section seal ring forms an internal-pressure acting surface of the vessel, and the other end of the variable-section seal ring forms an outer-side longitudinal sealing surface. The outer-side longitudinal sealing surface located at the root of the variable-section seal ring is provided with an outer-side reinforcing surface. A first groove and a second groove are formed in the position close to the lower end of the outer-side longitudinal sealing surface in a spaced mode. An outer-side chamfer angle is arranged at the bottom of the outer-side longitudinal sealing surface and located at the bottom surface of the variable-section seal ring. An open trunk bulkhead is formed in the inner wall face of an opening flange, and the outer-side longitudinal sealing surface of the variable-section seal ring abuts against the inner surface of the open trunk bulkhead. Because the radial thickness of the seal ring decreases progressively from the root to the end, the radial deformation of the end structure can be increased; in addition, the higher the internal pressure of the vessel is, the tighter the outer-side longitudinal sealing surface is attached, and therefore leakage is prevented.
Description
Technical field
The present invention relates to the leakage preventing technology field of internal pressure vessel big opening, especially a kind of change of internal pressure vessel big opening
Section self-locking device for preventing leakage.
Background technology
There is more technical difficulty always in the sealing problem of internal pressure vessel big opening end face.In prior art, generally adopt
Flange seal mode be forced seal, pretightning force is applied by bolt, make flange face and sealing ring before bearing internal pressure in advance
First produce compression, pretightning force is gradually reduced in pressure process, but compression surplus is also had on sealing surface, thus ensureing container
Interior medium does not leak.The disadvantage of this mode is：Sealing efficiency gradually can drop with the increase of container internal pressure
Low, easily leak under high pressure；And the laminating degree of sealing surface is very crucial, tools for bolts ' pretension degree is uneven to affect sealing effectiveness, because
This pressure is also required to pretension whole bolt when relatively low, even if installing whole bolts to cannot guarantee that flange periphery decrement
Circumferential uniformity, thus tend not to avoid local leakage.
Content of the invention
The applicant is directed to the shortcoming in above-mentioned existing production technology, provides a kind of internal pressure vessel big opening rational in infrastructure
Variable cross-section self-locking device for preventing leakage, thus self-tightening sealing can be realized using container internal pressure and malformation principle, pressure
Power is higher, and the longitudinal sealing face of device for preventing leakage is better with container inner wall laminating degree, and sealing is also better.
The technical solution adopted in the present invention is as follows：
A kind of variable cross-section self-locking device for preventing leakage of internal pressure vessel big opening, including flange flat cover, described flange flat cover
Bottom be extended with variable cross-section sealing ring, described variable cross-section sealing ring be axial symmetry short cylindrical structure, described variable cross-section sealing ring
Radial thickness successively decreased from root to end linear；One end of described variable cross-section sealing ring forms container internal pressure acting surface, another
End forms outside longitudinal sealing face, is provided with outside and strengthens face on the outside longitudinal sealing face of variable cross-section sealing ring root,
Described outside longitudinal sealing face has the first groove and the second groove near lower end interval, installs first close in described first groove
Seal, installs the second sealing ring in described second groove, described first groove and the second groove is respectively arranged with groove top
Corner chamfering and bottom portion of groove corner chamfering, the bottom in described outside longitudinal sealing face is provided with outside chamfering, and is located at change section
At the bottom surface of face sealing ring；Described flange flat cover edge has the first bolt hole, also includes and opening that the cooperation of flange flat cover is installed
Mouth flange, described opening flange periphery has the second bolt hole, and described first bolt hole and the second bolt in the hole connect double end spiral shell
Post, and locked by nut at the two ends of studs；The internal face of described opening flange is formed with opening leg, and described change cuts
The outside longitudinal sealing face of face sealing ring is abutted with opening wall interior surface.
Improvement further as technique scheme：
Described first sealing ring and the second sealing ring are all using O-ring seal；
Described outside reinforcement face is 45 ° of hypotenuses, passes through arc chord angle between described outside reinforcement face and outside longitudinal sealing face
Transition；
Described groove top corner chamfering is less than bottom portion of groove corner chamfering；
Longitudinal buffer is left between described first sealing ring, the second sealing ring and the interface of flange flat cover and opening flange
Distance.
Beneficial effects of the present invention are as follows：
Present configuration is compact, reasonable, make with easy for installation, by flange flat cover end setting variable cross-section sealing ring
Design, can effectively ensure the sealing reliability between flange flat cover and container inner wall it is ensured that use during will not send out
The phenomenon of raw leakage.
The radial thickness of variable cross-section sealing ring of the present invention is successively decreased from root to end linear, structure longitudinal rigidity
Reduce therewith, thus energy enlarged ends deflection, make the deformation that is radially expanded in longitudinal sealing face be more than container inner wall, with internal pressure
Increase, the two laminating degree more preferably, realizes self-energized seal.
First sealing ring of the present invention and the second sealing ring all using O-ring seal, due to O-ring and self-tightening sealing
Face and flange interface leave more fore-and-aft distance, even if flange face slightly opens or edge deformation is uneven nor affects on sealing
Do not need during effect, therefore installation bolt to apply very big pretightning force, and the installation number of bolt can reduce as one sees fit in low pressure operating mode,
Circumferential uniform intervals are taken to install, time saving and energy saving, in hgher efficiency.
Flange interface of the present invention does not seal, thus the processing that can reduce end face of flange roughness will
Ask, and desirable disappear flange face fluting and sealing ring or pad, thus Simplified flowsheet reduces cost.
The present invention effectively can be strengthened to structure Root Stress concentration zones it is particularly possible to notable drop using variable cross-section design
Tension peak value inside low root, extends fatigue life, strengthens durability, and the straight flange form of linear variable cross-section is also easier
It is machined out.
Brief description
Fig. 1 is the partial structural diagram of the present invention（Full sectional view）.
Fig. 2 is the structural representation of variable cross-section sealing ring of the present invention.
Fig. 3 is the front view of flange flat cover of the present invention.
Fig. 4 is the front view of opening flange of the present invention.
Fig. 5 is the structural representation after flange flat cover of the present invention is assembled with opening flange.
Wherein：1st, flange flat cover；2nd, variable cross-section sealing ring；3rd, the first sealing ring；4th, the second sealing ring；5th, the first bolt
Hole；6th, outside reinforcement face；7th, the first groove；8th, container internal pressure acting surface；9th, outside longitudinal sealing face；10th, the second groove；11、
Groove top corner chamfering；12nd, outside chamfering；13rd, bottom surface；14th, bottom portion of groove corner chamfering；15th, the second bolt hole；16th, open
Mouth flange；17th, opening leg；18th, studs；19th, nut.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, the variable cross-section self-locking of the internal pressure vessel big opening of the present embodiment is prevented letting out
Leakage device, including flange flat cover 1, the bottom of flange flat cover 1 is extended with variable cross-section sealing ring 2, and variable cross-section sealing ring 2 is axial symmetry
Short cylindrical structure, the radial thickness of variable cross-section sealing ring 2 is successively decreased from root to end linear；One end shape of variable cross-section sealing ring 2
Become container internal pressure acting surface 8, the other end forms outside longitudinal sealing face 9, longitudinally close positioned at the outside of variable cross-section sealing ring 2 root
Outside is provided with front cover 9 and strengthens face 6, outside longitudinal sealing face 9 has the first groove 7 and the second groove near lower end interval
10, the first sealing ring 3 is installed in first groove 7, in the second groove 10, second sealing ring 4, the first groove 7 and the second groove is installed
It is respectively arranged with groove top corner chamfering 11 and bottom portion of groove corner chamfering 14, the bottom in outside longitudinal sealing face 9 sets on 10
It is equipped with outside chamfering 12, and at the bottom surface 13 of variable cross-section sealing ring 2；Flange flat cover 1 edge has the first bolt hole 5, also
Including the opening flange 16 installed with flange flat cover 1 cooperation, opening flange 16 edge has the second bolt hole 15, the first bolt hole
5 and second connect studs 18 in bolt hole 15, and are locked by nut 19 at the two ends of studs 18；Opening flange 16
Internal face be formed with opening leg 17, the outside longitudinal sealing face 9 of variable cross-section sealing ring 2 and opening leg 17 inner surface support
Connect.
First sealing ring 3 and the second sealing ring 4 are all using O-ring seal.
It is 45 ° of hypotenuses that face 6 is strengthened in outside, passes through arc chord angle transition between outside reinforcement face 6 and outside longitudinal sealing face 9.
Groove top corner chamfering 11 is less than bottom portion of groove corner chamfering 14.
Leave longitudinally slow between first sealing ring 3, the second sealing ring 4 and the interface of flange flat cover 1 and opening flange 16
Rush distance.
Container internal pressure acting surface 8 of the present invention directly bears the hydraulic load within container.
Variable cross-section sealing ring 2 of the present invention is integral structure with flange flat cover 1, and the two is joined directly together in root
During actually used, as depicted in figs. 1 and 2, container internal pressure acts on opening leg 17, flange flat cover 1
On lower surface, the container internal pressure acting surface 8 and bottom surface 13 of variable cross-section sealing ring 2, internal pressure makes the outside longitudinal sealing of sealing structure
Face 9 comes in contact, extrudes with opening leg 17.The radial thickness of the variable cross-section sealing ring 2 of axially symmetric structure is from root to end
Linear decrease, the rigidity of structure also reduces therewith, make outside longitudinal sealing face 9 be radially expanded deformation be more than opening leg 17, two
Person's laminating degree is more preferable, thus prevent leakage.
First sealing ring 3 and the second sealing ring 4 are arranged in variable cross-section sealing ring 2 lower end radial-deformation larger part, a side
Face is conducive to strengthening the effect of self-tightening sealing, on the other hand, can make self-tightening sealing face（Outside longitudinal sealing face 9）With flange flat cover
Interface between 1 and opening flange 16 keeps certain longitudinal buffer distance, and this distance is subject to hydraulic pressure much larger than flange flat cover 1 edge
The small length travel producing, even if flange periphery deformation is uneven or flange face slightly opens and nor affects on sealing effectiveness, because
Do not need to apply very big pretightning force during this installation locking part, and the installation number of studs 18 and nut 19 is in low pressure operating mode
Can reduce as one sees fit, take circumferential uniform intervals to install, additionally, flange flat cover 1 and opening flange 16 surface roughness also can be reduced
Processing request, and cancel flange face fluting and sealing ring or pad.
The container internal pressure acting surface 8 of variable cross-section sealing ring 2 of the present invention can have to Root Stress concentrated area
Effect is strengthened it is particularly possible to significantly reduce the tension peak value inside root, thus extending fatigue life, strengthens durability.Become and cut
Adopt 45 ° of hypotenuses and circular arc chamfering transition outside face sealing ring 2 root, the compression peak value of this corner can be significantly attenuated, reduce
Requirement to strength of materials grade.Container internal pressure acting surface 8 is also easy to process using the straight design of linear variable cross-section and reduces
Cost.
O-ring groove bottom corner chamfering 14 all takes big chamfered transition, can significantly reduce stress raisers, groove
Top corner chamfering 11 takes little chamfered transition, to prevent O-ring seal to be subject to crushing in deformation or to deviate from.Outside chamfering 12
Design, imports at opening when can be convenient for assembly.
Above description is explanation of the invention, is not the restriction to invention, limited range of the present invention is referring to right
Require, within protection scope of the present invention, any type of modification can be made.
Claims (5)
1. a kind of internal pressure vessel big opening variable cross-section self-locking device for preventing leakage it is characterised in that：Including flange flat cover（1）,
Described flange flat cover（1）Bottom be extended with variable cross-section sealing ring（2）, described variable cross-section sealing ring（2）For axial symmetry short cylindrical
Structure, described variable cross-section sealing ring（2）Radial thickness successively decreased from root to end linear；Described variable cross-section sealing ring（2）'s
One end forms container internal pressure acting surface（8）, other end formation outside longitudinal sealing face（9）, positioned at variable cross-section sealing ring（2）Root
Outside longitudinal sealing face（9）On be provided with outside strengthen face（6）, described outside longitudinal sealing face（9）It is spaced apart near lower end
There is the first groove（7）With the second groove（10）, described first groove（7）Interior installation the first sealing ring（3）, described second groove
（10）Interior installation the second sealing ring（4）, described first groove（7）With the second groove（10）On be respectively arranged with groove top corner
Chamfering（11）With bottom portion of groove corner chamfering（14）, described outside longitudinal sealing face（9）Bottom be provided with outside chamfering（12）,
And it is located at variable cross-section sealing ring（2）Bottom surface（13）Place；Described flange flat cover（1）Edge has the first bolt hole（5）, also include
With flange flat cover（1）The opening flange that cooperation is installed（16）, described opening flange（16）Edge has the second bolt hole（15）, institute
State the first bolt hole（5）With the second bolt hole（15）Interior connection studs（18）, and in studs（18）Two ends pass through
Nut（19）Locking；Described opening flange（16）Internal face be formed with opening leg（17）, described variable cross-section sealing ring（2）'s
Outside longitudinal sealing face（9）With opening leg（17）Inner surface abuts.
2. internal pressure vessel big opening as claimed in claim 1 variable cross-section self-locking device for preventing leakage it is characterised in that：Described
First sealing ring（3）With the second sealing ring（4）All using O-ring seal.
3. internal pressure vessel big opening as claimed in claim 1 variable cross-section self-locking device for preventing leakage it is characterised in that：Described
Face is strengthened in outside（6）For 45 ° of hypotenuses, described outside reinforcement face（6）With outside longitudinal sealing face（9）Between pass through arc chord angle mistake
Cross.
4. internal pressure vessel big opening as claimed in claim 1 variable cross-section self-locking device for preventing leakage it is characterised in that：Described
Groove top corner chamfering（11）Than bottom portion of groove corner chamfering（14）Little.
5. internal pressure vessel big opening as claimed in claim 1 variable cross-section self-locking device for preventing leakage it is characterised in that：Described
First sealing ring（3）, the second sealing ring（4）With flange flat cover（1）With opening flange（16）Interface between leave longitudinally slow
Rush distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661268.XA CN104455412B (en) | 2014-11-19 | 2014-11-19 | Variable-section self-locking leakage prevention device for large opening of internal-pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661268.XA CN104455412B (en) | 2014-11-19 | 2014-11-19 | Variable-section self-locking leakage prevention device for large opening of internal-pressure vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104455412A CN104455412A (en) | 2015-03-25 |
| CN104455412B true CN104455412B (en) | 2017-02-08 |
Family
ID=52901938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410661268.XA Active CN104455412B (en) | 2014-11-19 | 2014-11-19 | Variable-section self-locking leakage prevention device for large opening of internal-pressure vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104455412B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB634658A (en) * | 1947-02-14 | 1950-03-22 | English Electric Co Ltd | Improvements relating to the sealing of joints |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076170A (en) * | 1977-04-18 | 1978-02-28 | Beckman Instruments, Inc. | Tube cap assembly for preparative centrifuge rotors |
| DE4013817C1 (en) * | 1990-04-30 | 1991-04-11 | Samaro Engineering Und Handels Ag, Rueti, Ch | |
| DE19638657C2 (en) * | 1996-09-20 | 2000-03-23 | Siemens Ag | Covering device for power plants with a chamber element and an overlying multi-secured cover element |
| CN101884884A (en) * | 2010-06-28 | 2010-11-17 | 濮阳泓天威药业有限公司 | Sealing structure for vessel port of double-cone mixer |
| CN201851647U (en) * | 2010-11-18 | 2011-06-01 | 美药星（南京）制药有限公司 | Improved stainless steel liquid storage pot |
-
2014
- 2014-11-19 CN CN201410661268.XA patent/CN104455412B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB634658A (en) * | 1947-02-14 | 1950-03-22 | English Electric Co Ltd | Improvements relating to the sealing of joints |
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| Publication number | Publication date |
|---|---|
| CN104455412A (en) | 2015-03-25 |
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