CN203189722U - Metal ring gasket - Google Patents
Metal ring gasket Download PDFInfo
- Publication number
- CN203189722U CN203189722U CN 201320199914 CN201320199914U CN203189722U CN 203189722 U CN203189722 U CN 203189722U CN 201320199914 CN201320199914 CN 201320199914 CN 201320199914 U CN201320199914 U CN 201320199914U CN 203189722 U CN203189722 U CN 203189722U
- Authority
- CN
- China
- Prior art keywords
- metal ring
- trapezoid
- shaped
- rounding
- fillets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a metal ring gasket, and belongs to the technical field of sealing elements. The metal ring gasket comprises a metal ring. The cross section of the metal ring is a rectangle, wherein the four corners of the rectangle are all fillets. An O-shaped ring is arranged on each fillet of the metal ring. When the metal ring gasket is used, the metal ring is arranged between two flanges, trapezoid-shaped grooves are formed in corresponding positions of each flange, and the upper end and the lower end of the metal ring extend into the trapezoid-shaped grooves. The O-shaped rings at the fillets of the metal ring make contact with two inner side faces of each trapezoid-shaped groove firstly, elastic deformation happens to the O-shaped rings along with the increase of the pressing force between the flanges, and the elastic deformation makes the O-shaped rings and an uneven contact surface be closely attached to each other to realize good sealing. Meanwhile, the fillets of the metal ring make contact with the inner side faces of the trapezoid-shaped grooves to realize sealing again. If the outer side faces of a part of the fillets and the inner side faces of the trapezoid-shaped grooves are not closely attached to each other, the O-shaped rings still can make up. Therefore, requirements for manufacturing accuracy and surface roughness of the metal ring gasket and the trapezoid-shaped grooves of the flanges are low.
Description
Technical field
The utility model relates to the pad that seals usefulness, relates in particular to a kind of for the metal ring pad that seals between the flanged surface.
Background technique
The metal ring pad is that to become sectional shape with metal material processing be octagon or oval-shaped entity metallic shim, has the radial seal energized by internal pressure effect.The metal ring pad is that the back cushion sheet contacts with the interior outer side surface (mainly being outer side surface) of flange dovetail groove, and forms sealing by compressing.
The metal ring pad derives from the U.S. the earliest, use field of boilers first in the twenties in 20th century, be used for the sealing of manhole cover, autoclave and other containers, in Petroleum Production and petroleum refining industry, especially come into one's own later on, along with the temperature and pressure increase of steam power plant, the purposes of metal ring pad just more and more widely.The nominal pressure that the metal ring pad is suitable for is 2.0 ~ 42.0MPa..
The cross section is that oval-shaped metal ring pad is that line contacts with flange slot, and sealing is better, but the requirement on machining accuracy height, thereby increased manufacture cost.Octagonal metal ring pad requirement on machining accuracy is higher, requires the face contact.This pad is also very high to the required precision of flange slot with matching, and not so the sidewall of annular gasket just can not form with the madial wall of flange slot and be close to the influence sealing.
Summary of the invention
The utility model provides the metal ring pad at deficiency of the prior art, and is lower to the accuracy of manufacturing requirement, reduces production costs greatly.
For solving the problems of the technologies described above, the utility model is solved by following technical proposals: the metal ring pad, comprise metal ring, the cross section of described metal ring is to be the rectangle of rounding or chamfering around one, and each rounding of described metal ring or chamfering place are provided with O type circle.During use, metal ring is arranged between two flanges, is provided with dovetail groove on the relevant position of each flange, and the two ends up and down of metal ring are stretched in the described dovetail groove.The O type circle of the rounding of metal ring or chamfering contacts with two inner side surfaces of dovetail groove earlier, lifting along with impacting force between the flange plate, O type circle generation elastic strain, this elastic strain makes O type circle to be close to the out-of-flatness of Compensating flange face upper trapezoid groove inwall with rough surface of contact formation.Rounding or the chamfering place of metal ring also contact with the inner side surface of dovetail groove simultaneously, form sealing again.If there is the outer side surface of part rounding or chamfering not to be close to the inner side surface formation of dovetail groove, O type circle also can remedy, so the utility model is less demanding to accuracy of manufacturing and the surface roughness of metal ring pad and flange dovetail groove, and low cost of manufacture.Difference according to selecting rubber heatproof degree can realize-Environmental Conditions of 100/+300 degree.
In the technique scheme, preferred, described rounding or chamfering place are provided with draw-in groove, and described O type circle snaps in the described draw-in groove, and has at least the described O type of part circle to be exposed at outside the described draw-in groove.Draw-in groove makes things convenient for location and the installation of O type circle, and O type circle partly is exposed at outside the draw-in groove, and when guaranteeing that the utility model is installed, O type circle contacts with dovetail groove at first.
In the technique scheme, preferred, each described rounding or chamfering place are provided with two circle O type circles.
In the technique scheme, preferred, described O type circle is divided into isometric three parts with described rounding or described chamfering.Guaranteeing when mounted can uniform-compression.
In the technique scheme, preferred, the line of described O type circle directly is that 1.5mm is to 3.0mm.
The beneficial effects of the utility model are: during installation, O type circle closely contacts with the dovetail groove inwall by elastically-deformable mode, the out-of-flatness of Compensating flange dovetail groove.Even the madial wall of dovetail groove has certain foozle or roughness, elastic strain also can remedy, so the utility model is low to the accuracy of manufacturing requirement of product, and cost of production also just reduces greatly.
Description of drawings
Fig. 1 is first embodiment's of the utility model schematic representation.
Fig. 2 is the schematic representation in first cross section of embodiment of the utility model.
Schematic representation when Fig. 3 applies to the flanged surface sealing for first embodiment's of the utility model schematic representation.
Fig. 4 is second embodiment's of the utility model schematic representation.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail: embodiment 1, referring to Fig. 1 to Fig. 2, the metal ring pad, comprise metal ring 1, the cross section of metal ring 1 is to be the rectangle of rounding 11 around one, each rounding 11 place of metal ring 1 form two circle draw-in grooves 12, are provided with an O type circle in each draw-in groove 12, and have at least part of O type circle 2 to be exposed at outside the draw-in groove 12.
One of them O type circle 2 is positioned at 1/3 place of rounding arc length, and another O type circle 2 is positioned at 2/3 place of rounding arc length, and two O type circles are divided into isometric three parts with described rounding.
The line of O type circle 2 directly is 1.5 mm.
Referring to Fig. 3, during use, the utility model is installed between the dovetail groove 31 of two flange plate 3, the O type circle 2 at rounding 11 places of metal ring 1 contacts with two inner side surfaces of dovetail groove 31 earlier, lifting along with impacting force between the flange plate 3, elastic strain takes place in O type circle 2, and this elastic strain makes O type circle to be close to rough surface of contact formation, forms excellent sealing.The rounding place of metal ring also contacts with the inner side surface of dovetail groove simultaneously, forms sealing again.If there is the outer side surface of part rounding not to be close to the inner side surface formation of dovetail groove, O type circle also can remedy, so the utility model is less demanding to accuracy of manufacturing and the surface roughness of metal ring pad and flange dovetail groove, and low cost of manufacture.
Claims (5)
1. metal ring pad, comprise metal ring (1), the cross section of described metal ring (1) is to be the rectangle of rounding (11) or chamfering (11 ') around one, and it is characterized in that: each rounding (11) or the chamfering (11 ') of described metal ring (1) locate to be provided with O type circle (2).
2. metal ring pad according to claim 1, it is characterized in that: described rounding (11) or chamfering (11 ') locate to be provided with draw-in groove (12,12 '), described O type circle (2) snaps in the described draw-in groove (12,12 '), and has at least the described O type of part circle (2) to be exposed at outside the described draw-in groove (12,12 ').
3. metal ring pad according to claim 2 is characterized in that: each described rounding (11) or chamfering (11 ') locate to be provided with two circle O type circles (2).
4. metal ring pad according to claim 3, it is characterized in that: described O type circle (2) is divided into isometric three parts with described rounding (11) or chamfering (11 ').
5. want 3 or 4 described metal ring pads according to right, it is characterized in that: the line of described O type circle (2) directly is that 1.5mm is to 3.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320199914 CN203189722U (en) | 2013-04-19 | 2013-04-19 | Metal ring gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320199914 CN203189722U (en) | 2013-04-19 | 2013-04-19 | Metal ring gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203189722U true CN203189722U (en) | 2013-09-11 |
Family
ID=49106583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320199914 Expired - Fee Related CN203189722U (en) | 2013-04-19 | 2013-04-19 | Metal ring gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203189722U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206539A (en) * | 2013-04-19 | 2013-07-17 | 宁波易天地信远密封技术有限公司 | Metal gasket |
-
2013
- 2013-04-19 CN CN 201320199914 patent/CN203189722U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206539A (en) * | 2013-04-19 | 2013-07-17 | 宁波易天地信远密封技术有限公司 | Metal gasket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20180419 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |