CN209524201U - A kind of interference-fit type flange - Google Patents
A kind of interference-fit type flange Download PDFInfo
- Publication number
- CN209524201U CN209524201U CN201920088233.XU CN201920088233U CN209524201U CN 209524201 U CN209524201 U CN 209524201U CN 201920088233 U CN201920088233 U CN 201920088233U CN 209524201 U CN209524201 U CN 209524201U
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- China
- Prior art keywords
- annular
- interference
- flange disk
- flange
- gasket
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- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The utility model discloses a kind of interference-fit type flange, including the first flange disk and second flange disk being bolted, it is equipped with flanged joint column above first flange disk, flanged joint top end inner wall is stepped shape, forms multi-stage annular link slot；Be equipped with self-regulation gasket between first flange disk and second flange disk, self-regulation gasket mainly by annular plain cushion, be attached to the separation layer on annular plain cushion surface and be attached to the protective layer of insulation surface and form；The equally spaced outwardly convex of separation layer upper and lower surfaces forms a plurality of concentric ring-shaped seals band for being pierced by protective layer；Oil pocket is equipped in annular plain cushion, oil pocket extends in each annular sealing strip, and oil pocket is provided with appropriate hydraulic oil；First flange disk and second flange disk, which correspond at annular sealing strip, is equipped with annular seal groove, and annular sealing strip is matched with annular seal groove interference.The setting of self-regulation gasket had not only realized interference fit, but also was easily installed.
Description
Technical field
The utility model relates to petroleum pipeline technical field of sealing technology, and in particular to a kind of modified interference-fit type flange.
Background technique
Since the 21th century, the same energy supply of economic development, environmental protection contradiction become increasingly conspicuous, countries in the world are numerous and confused
Using " safe and efficient, environmentally friendly, economical " as the theme of industrial development.This trend is mainly reflected in that high temperature is set in petrochemical industry
The compactness of standby safe operation and connection system.
Flanged joint is widely used in the connection of petrochemical industry pressure pipeline with its easy-disassembling-assembling advantage.Common convex surface method
Blue end face of flange is convex surface platform, and high temperature and high pressure condition lower flange can generate moment of flexure, lead to gasket unbalance stress, ring flange
It deflects, and then is easy to produce leakage problem；In addition, end face of flange, gasket and bolt can under high temperature and pressure mode of operation
By very big stress, each component in flanged joint is caused to generate creep, and then lead to Flanged Connection System relaxation, finally led
Cause the leakage failure of flange connections.
Interference-fit type flange solves the above problem, and the definition of interference fit is the size in hole and the axis that is matched therewith
The difference of size be negative, that is, refer to that this sealing structure is by many producers with the cooperation of interference (being equal to zero including minimum interference)
Using.But since the volume of the volume ratio seal groove of seal boss is big, the form of interference fit leads to flange assembling process ten
Divide difficulty, while the environment such as received heat influence in different environments for flange and pipeline, size may generate little deviation, cause
Flange and pipe diameter mismatch in welding process, influence construction quality.
Utility model content
In view of the above technical problems, the utility model proposes a kind of modified interference-fit type flanges.
A kind of interference-fit type flange, including the first flange disk and second flange disk being bolted, described first
It is equipped with flanged joint column above ring flange, flanged joint top end inner wall is stepped shape, forms multi-stage annular link slot；
Between the first flange disk and the second flange disk be equipped with self-regulation gasket, the self-regulation gasket mainly by
Annular plain cushion, the separation layer for being attached to the annular plain cushion surface and the protective layer composition for being attached to the insulation surface；Institute
The equally spaced outwardly convex of separation layer upper and lower surfaces is stated, a plurality of concentric ring-shaped seals band for being pierced by the protective layer is formed；It is described
Oil pocket is equipped in annular plain cushion, the oil pocket extends in annular sealing strip described in each, and the oil pocket is provided with appropriate liquid
Pressure oil；
The first flange disk and the second flange disk, which correspond at the annular sealing strip, is equipped with annular seal groove,
The annular sealing strip is matched with the annular seal groove interference.
Further, the first flange disk and the second flange disk opposite face are equipped with auxiliary seal ring, and described second
Ring flange place opposite with the auxiliary seal ring is equipped with auxiliary seal groove；The auxiliary seal ring is set to the annular seal groove
Outside；Further, the auxiliary seal ring bottom be equipped with delta seal slot, the auxiliary seal trench bottom be equipped with it is described
The delta seal ring that delta seal slot matches；Further, auxiliary seal pad is equipped in the auxiliary seal groove.
Further, the diameter of the flanged joint column is from top to bottom gradually increased；Further, the flanged joint
Column is made of inner tube, outer tube, and the diameter of the inner tube is isometric from top to bottom, the diameter of the outer tube from top to bottom by
It is cumulative big；The outer tube is from top to bottom equipped with several reinforcing rings at the inner tube；Further, the outer tube
Surface is equipped with erosion resistant coating.
Further, the first gasket and the second gasket, first gasket and second pad are socketed on the bolt
Piece is respectively equipped with tooth engaged and occlusal crib on opposite sides.
1. flanged joint column top multi-stage annular link slots provide different pore size to having the beneficial effect that in the utility model
Welding surface can effectively reduce the gap between petroleum pipeline and flanged joint column, so that connection between the two is more secured；
2. the setting of self-regulation gasket had not only realized interference fit, but also was easily installed；3. auxiliary seal ring and auxiliary seal groove,
It is self-regulated on the basis of the interference seal that gasket provides, is further added by a seal structures, further increases to the close of petroleum pipeline
Feng Xing.
Detailed description of the invention
Fig. 1 is the internal structure cross-sectional view of interference-fit type flange；
Fig. 2 is the partial structure diagram of self-regulation gasket；
Fig. 3 is the schematic diagram of internal structure of the middle section Fig. 2 A.
Specific embodiment
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.The utility model
Embodiment is given for the purpose of illustration and description, and be not be limited to exhaustively or by the utility model it is disclosed
Form.Many modifications and variations are obvious for the ordinary skill in the art.Selection and description are implemented
Example be in order to more preferably illustrate the principles of the present invention and practical application, and make those skilled in the art it will be appreciated that
The utility model is to design various embodiments suitable for specific applications with various modifications.
A kind of interference-fit type flange, as shown in Figure 1, including by the fixed first flange disk 1 of bolt 4 and second flange
Disk 2 is equipped with self-regulation gasket 3 between the first flange disk 1 and the second flange disk 2.
The self-regulation gasket 3, as shown in Figure 2 and Figure 3, mainly by annular plain cushion 301, be attached to the annular plain cushion 301
The separation layer 302 on surface and the protective layer 303 for being attached to the insulation surface form；302 upper and lower surfaces of separation layer are equal
Outwardly convex at equal intervals forms a plurality of concentric ring-shaped seals band 304 for being pierced by the protective layer；It is set in the annular plain cushion 301
There is oil pocket 305, the oil pocket 305 extends in annular sealing strip 304 described in each, and the oil pocket 305 is provided with appropriate liquid
Pressure oil.The first flange disk 1 and the second flange disk 2, which correspond at the annular sealing strip, is respectively equipped with annular seal groove
101/201, the annular sealing strip is matched with the annular seal groove interference.
Oil pocket is provided with appropriate hydraulic oil, and hydraulic oil has mobility, when annular sealing strip starts to be embedded in annular seal groove,
After annular sealing strip is by external compression, inside extruding force is formed to the oil pocket of its inside, so that hydraulic oil is to annular
Oil pocket flowing inside plain cushion, the space being inwardly compressed is left to annular sealing strip, consequently facilitating in insertion annular seal groove；
During first flange disk and second flange disk are bolted, the annular plain cushion for the gasket that is self-regulated is by from first
The pressure of ring flange and second flange disk, oil pocket flowing of the hydraulic oil of internal oil pocket into annular sealing strip, so that annular
It is full inside band, it is matched with annular seal groove interference.Here suitable hydraulic oil refers to that hydraulic oil still has inside oil pocket
Certain flowing space, and can guarantee after flange is installed, annular sealing strip is in interference with annular seal groove and matches shape
State.
The material of annular gasket can use but be not limited to red copper, and red copper plasticity is fabulous, be easy to hot pressing and cold pressure processing,
Certain deformation quantity can be generated under the extruding of two side flanges；The material of separation layer can use but be not limited to polytetrafluoroethyl-ne
Alkene, polytetrafluoroethylene (PTFE) have the characteristics that antiacid alkali resistant, resist various organic solvents, are practically insoluble in all solvents, while having resistance to
The characteristics of high temperature, coefficient of friction are extremely low；Protective layer can use but be not limited to the silk screen of monel alloy production, monel metal
Also known as nickel alloy is one kind using metallic nickel as matrix, and alloy made of other elements such as addition copper, iron, manganese has fairly good
Corrosion resistance；During annular sealing strip is embedded in annular seal groove, ring packing belt surface can also be coated with lubricant layer
306, such as expanded graphite, expanded graphite has extremely strong resistance to pressure, flexibility, plasticity and a self-lubrication, it is extremely strong resist it is high and low
Warm, anticorrosive, anti-radiation characteristic, extremely strong anti-aging, anti-twist characteristic, the fusing and infiltration that various metals can be resisted.
The first flange disk 1 is equipped with auxiliary seal ring 102, the second flange with 2 opposite face of second flange disk
Disk 2 and the opposite place of the auxiliary seal ring 102 are equipped with auxiliary seal groove 202；The auxiliary seal ring 102 is set to the annular
101 outside of seal groove.The setting of auxiliary seal ring and auxiliary seal groove, on the basis for the interference seal that self-regulation gasket provides
On, a seal structures are further added by, the leakproofness to petroleum pipeline is further increased.
In order to further increase auxiliary seal effect, 102 bottom of auxiliary seal ring is equipped with delta seal slot 103, institute
It states 202 bottom of auxiliary seal groove and is equipped with the delta seal ring 203 to match with the delta seal slot 103, the auxiliary seal
Auxiliary seal pad 204 is equipped in slot 202.
Flanged joint column 104 is equipped with above the first flange disk 1, the 104 top inner wall of flanged joint column is in ladder
Shape forms multi-stage annular link slot 105.Multi-stage annular link slot provides the welding surface of different pore size, when flanged joint column
When link slot and/or petroleum pipeline are influenced to occur slight change by environment, choose suitable welding surface welding petroleum pipeline and
Flanged joint column can effectively reduce the gap between petroleum pipeline and flanged joint column in this way, so that between the two
It connects more secured.Certainly, the margin here between the adjacent steps of multi-stage annular link slot is very little, with its own and stone
Oil-piping is influenced to occur slight change in same magnitude by environment.
The flanged joint column 104 is made of inner tube 1041, outer tube 1042, and the diameter of the inner tube 1041 is by upper
Isometric under, the diameter of the outer tube 1042 is from top to bottom gradually increased.Structure as flanged joint column increases and the
The contact area of one ring flange keeps it more secured with the connection of first flange disk.
The outer tube 1042 is from top to bottom equipped with several reinforcing rings 1043 at the inner tube 1041, reinforcing ring
The intensity that flanged joint column can be increased is set, inner tube is helped to resist the pressure from petroleum pipeline internal flow.It is described outer
Layer 1042 surface of pipe is equipped with erosion resistant coating 1044, and the material of erosion resistant coating can use but be not limited to atactic copolymerized polypropene, has good
Good anti-corrosion effects.
The first gasket 5 and the second gasket 6 are socketed on the bolt 4, first gasket 5 and second gasket 6 exist
Tooth engaged and occlusal crib are respectively equipped on opposite face, tooth engaged and occlusal crib are mutually twisted, and are prevented bolt, nut from loosening, are improved
The fixed compactness of bolt.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (8)
1. a kind of interference-fit type flange, including the first flange disk and second flange disk being bolted, it is characterised in that:
It is equipped with flanged joint column above the first flange disk, flanged joint top end inner wall is stepped shape, forms multistage ring
Shape link slot；
Self-regulation gasket is equipped between the first flange disk and the second flange disk, the self-regulation gasket is mainly by annular
Plain cushion, the separation layer for being attached to the annular plain cushion surface and the protective layer composition for being attached to the insulation surface；It is described every
The equally spaced outwardly convex of absciss layer upper and lower surfaces forms a plurality of concentric ring-shaped seals band for being pierced by the protective layer；The annular
Oil pocket is equipped in plain cushion, the oil pocket extends in annular sealing strip described in each, and the oil pocket is provided with appropriate hydraulic oil；
The first flange disk and the second flange disk, which correspond at the annular sealing strip, is equipped with annular seal groove, described
Annular sealing strip is matched with the annular seal groove interference.
2. interference-fit type flange according to claim 1, it is characterised in that: the first flange disk and second method
Blue disk opposite face is equipped with auxiliary seal ring, and the second flange disk is opposite with the auxiliary seal ring to be located to be equipped with auxiliary seal groove；
The auxiliary seal ring is set on the outside of the annular seal groove.
3. interference-fit type flange according to claim 2, it is characterised in that: the auxiliary seal ring bottom is equipped with triangle
Seal groove, the auxiliary seal trench bottom are equipped with the delta seal ring to match with the delta seal slot.
4. interference-fit type flange according to claim 3, it is characterised in that: it is close to be equipped with auxiliary in the auxiliary seal groove
Packing.
5. interference-fit type flange according to claim 1, it is characterised in that: the diameter of the flanged joint column by up to
Under be gradually increased.
6. interference-fit type flange according to claim 5, it is characterised in that: the flanged joint column is by inner tube, outer
Layer pipe composition, the diameter of the inner tube is isometric from top to bottom, and the diameter of the outer tube is from top to bottom gradually increased；It is described outer
Layer, which is managed, is from top to bottom equipped with several reinforcing rings at the inner tube.
7. interference-fit type flange according to claim 6, it is characterised in that: the outer layer pipe surface is equipped with erosion resistant coating.
8. interference-fit type flange according to claim 1, it is characterised in that: be socketed on the bolt the first gasket and
Second gasket, first gasket and second gasket are respectively equipped with tooth engaged and occlusal crib on opposite sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920088233.XU CN209524201U (en) | 2019-01-21 | 2019-01-21 | A kind of interference-fit type flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920088233.XU CN209524201U (en) | 2019-01-21 | 2019-01-21 | A kind of interference-fit type flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209524201U true CN209524201U (en) | 2019-10-22 |
Family
ID=68229702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920088233.XU Expired - Fee Related CN209524201U (en) | 2019-01-21 | 2019-01-21 | A kind of interference-fit type flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209524201U (en) |
-
2019
- 2019-01-21 CN CN201920088233.XU patent/CN209524201U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191022 Termination date: 20220121 |