CN220016454U - Universal self-sealing flange - Google Patents
Universal self-sealing flange Download PDFInfo
- Publication number
- CN220016454U CN220016454U CN202320093654.8U CN202320093654U CN220016454U CN 220016454 U CN220016454 U CN 220016454U CN 202320093654 U CN202320093654 U CN 202320093654U CN 220016454 U CN220016454 U CN 220016454U
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- flange
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- 238000007789 sealing Methods 0.000 title claims abstract description 72
- 230000013011 mating Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model provides a universal self-sealing flange which comprises a main flange, a mating flange and a gasket, wherein the main flange is fixedly connected with the mating flange through a fastener; the self-sealing flange is characterized by further comprising a self-sealing assembly, wherein the self-sealing assembly is annular and is arranged on the end face of the main flange and is annularly arranged along the shaft hole of the main flange, and the outer diameter of the self-sealing assembly is matched with the shaft hole diameters of the gasket and the matched flange so as to be positioned in the shaft holes of the gasket and the matched flange; the main flange, the matched flange, the gasket and the self-sealing assembly are coaxial. The utility model solves the technical problem that the flange structure in the prior art is not suitable for medium and high temperature medium environments, and the self-sealing flange is convenient to manufacture and install.
Description
Technical Field
The utility model relates to the technical field of pipeline flange sealing, in particular to a universal self-sealing flange.
Background
In the fields of petroleum, chemical industry, pharmacy, power and electricity, metallurgy and the like, a flange is one of the most important and common forms for connecting pipelines, pipe fittings, valves, meters, equipment and the like, and the connection has the advantages of convenience in disassembly, safety, reliability, repeated utilization, no need of fire and the like. The conventional sealing flange assembly is used in low-temperature, medium-low-pressure environments, and leakage is caused when any element of the sealing flange assembly is problematic or the torsion of a pipeline is too large, so that the sealing flange assembly not only wastes the polluted environment, but also can cause safety accidents, even property loss and casualties. Over the years, as production technology has increased, the temperature and pressure of the media has also increased substantially, with more stringent requirements on the sealing flange. Besides the fact that the flange at the joint of the pipeline and the equipment cannot be canceled, the flange on the pipeline is replaced by a welding mode, and the application of the flange is reduced, but the working difficulty is increased for maintenance and overhaul. There is a great demand in the industry for sealing flange applications in the field of medium and high temperature media.
Disclosure of Invention
The utility model aims to provide a universal self-sealing flange which solves the technical problem that the sealing flange in the prior art is not suitable for medium and high temperature medium environments. For this purpose, the utility model adopts the following technical scheme:
the universal self-sealing flange comprises a main flange, a mating flange and a gasket, wherein the main flange is fixedly connected with the mating flange through a fastener; the self-sealing flange is characterized by further comprising a self-sealing assembly, wherein the self-sealing assembly is annular and is arranged on the end face of the main flange and is annularly arranged along the shaft hole of the main flange, and the outer diameter of the self-sealing assembly is matched with the shaft hole diameters of the gasket and the matched flange so as to be positioned in the shaft holes of the gasket and the matched flange; the main flange, the matched flange, the gasket and the self-sealing assembly are coaxial.
Further, the self-sealing assembly includes:
-an annular structural body, the outer wall of the shaft hole of which is fitted with the inner wall of the shaft hole of the mating flange, inside which an annular cavity is provided;
-a thermal expansion ring provided in the annular cavity of the annular structural body, the thermal expansion ring having a coefficient of thermal expansion greater than that of the annular structural body.
Further, the annular structure body is provided with two layers, and the two layers are stacked along the axis direction of the main flange.
Further, the material of the thermal expansion ring is 022Cr19Ni10.
Further, the cross section of the annular structure body is rectangular.
Further, sealing elements and/or sealing elements are arranged on the matching end surfaces of the main flange and the matched flange.
According to the universal self-sealing flange provided by the utility model, in a high-temperature medium environment, the sealing ring is heated and expanded to extrude the inner wall of the shaft hole of the matched flange, so that the self-sealing assembly on the main flange is tightly attached to the matched flange, medium leakage is avoided, the technical problem that the flange in the prior art is not suitable for medium and high-temperature medium environments is solved, the self-sealing flange is convenient to manufacture and install, and the self-sealing flange can also be matched with a sealing groove or a sealing piece on the end face of the flange.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a general self-sealing flange structure according to the present embodiment;
FIG. 2 is an exploded view of a universal self-sealing flange structure provided in this embodiment;
fig. 3 is a schematic structural diagram of a main flange of a universal self-sealing flange according to the present embodiment.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The universal self-sealing flange provided by the embodiment can be used for conveying medium which is at medium and high temperature, inflammable, explosive, toxic and corrosive, and effectively preventing medium leakage. The self-sealing flange structure comprises a main flange 1, a matched flange 2, a gasket 3, a fastener 4 and a self-sealing assembly 5. The self-sealing assembly 5 is arranged on the end face of the main flange 1 and is annularly arranged along the shaft hole of the main flange 1. The self-sealing assembly 5 is annular, the outer diameter of the self-sealing assembly is matched with the diameter of the shaft of the gasket 3 and the matched flange 2 so that the self-sealing assembly can be positioned in the shaft holes of the gasket 3 and the matched flange 2, the main flange 1, the matched flange 2, the gasket 3 and the self-sealing assembly 5 are coaxial, and the gasket 3 and the matched flange 2 are sequentially sleeved on the self-sealing assembly 5 during installation. The end surfaces of the mating flange 2 and the main flange 1 are provided with a plurality of corresponding connecting holes, which are suitable for the fasteners 4 to pass through, and the fasteners 4 can be bolts. The gasket 3 is arranged between the matching end surfaces of the main flange 1 and the matched flange 2. The mating flange 2 and the main flange 1 are cooperatively connected by a fastener 4.
The self-sealing assembly 5 comprises an annular structural body, wherein the annular structural body can be provided with two layers and is arranged in a stacked manner along the axial direction. The outer wall of the shaft hole of the two-layer annular structure body is attached to the inner wall of the shaft hole of the matched flange 2. The two-layer annular structure body is internally provided with hollow annular cavities, and thermal expansion rings 6 are respectively filled and arranged. The cross section of the annular structure body is rectangular. The thermal expansion coefficient of the thermal expansion ring 6 is larger than that of the annular structural body, the annular structural body is identical to that of the flange body, the thermal expansion ring 6 is made of 022Cr19Ni10, and the linear expansion coefficient of 022Cr19Ni10 at the same temperature is far higher than that of other metal materials and is more than 1.5 times that of the other metal materials. The self-sealing component 5 can be independently processed, and is simple to process and convenient to manufacture and install. The annular structural body is welded or screwed with the end face of the main flange 1, and the two layers of annular structural bodies can be welded and connected.
When the self-sealing flange is in a working state, a high-temperature medium flows through the flange in a medium-high temperature environment, and the thermal expansion ring 6 is uniformly heated and expanded. Because the thermal expansion coefficient of the thermal expansion ring 6 is larger than that of the annular structure body, the thermal expansion ring 6 is heated and expanded to extrude the annular structure body, so that the outer wall of the annular structure body is uniformly extruded to be tightly attached to the inner wall of the shaft hole of the matched flange 2, and the flange leakage channel is physically closed. On the one hand, the annular structure body uniformly extrudes the matched flange 2, so that the radial positioning stability of the thermal expansion ring 6 is ensured. On the other hand, the arrangement of the annular structure body avoids the direct contact between the thermal expansion ring 6 and the medium, and avoids the medium pollution caused by the non-uniform heating or expansion of the thermal expansion ring 6 or the corrosion of the medium. The high temperature medium may cause axial or radial deformation of the structure of the pipe and flange, and the arrangement of the self-sealing assembly 5 effectively prevents leakage of the medium. The higher the medium temperature, the more pronounced the compression effect of the thermally expansive ring 6, and the better the sealing effect of the self-sealing assembly 5.
When the self-sealing flange is in a maintenance state, the flange and the pipeline are cooled to the ambient temperature, the thermal expansion ring 6 is contracted, the bolts are loosened, and the matched flange 2 and the gasket 3 can be easily disassembled.
The main flange 1 and the matched end face of the matched flange 2 are provided with sealing elements or sealing grooves, and the sealing elements or sealing grooves can be matched with the self-sealing assembly 5 for use, so that medium leakage is further prevented.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (6)
1. The universal self-sealing flange comprises a main flange (1), a matched flange (2) and a gasket (3), wherein the main flange (1) is fixedly connected with the matched flange (2) through a fastener (4); the self-sealing flange is characterized by further comprising a self-sealing assembly (5), wherein the self-sealing assembly (5) is annular and is arranged on the end face of the main flange (1) and is annularly arranged along the shaft hole of the main flange (1), and the outer diameter of the self-sealing assembly (5) is matched with the shaft hole diameters of the gasket and the matched flange so as to be positioned in the shaft hole of the gasket and the matched flange; the main flange, the matched flange, the gasket and the self-sealing assembly are coaxial.
2. A universal self-sealing flange according to claim 1, characterized in that said self-sealing assembly (5) comprises:
-an annular structural body, the outer wall of the shaft hole of which is fitted with the inner wall of the shaft hole of the mating flange (2), inside which an annular cavity is provided;
-a thermal expansion ring (6) provided in the annular cavity of the annular structural body, the thermal expansion ring (6) having a coefficient of thermal expansion greater than that of the annular structural body.
3. A universal self-sealing flange according to claim 2, characterized in that the annular structural body is provided with two layers, stacked in the axial direction of the main flange (1).
4. A universal self-sealing flange according to claim 2, characterized in that the material of the thermal expansion ring (6) is 022Cr19Ni10.
5. A universal self-sealing flange according to claim 2, wherein said annular structural body is rectangular in cross-section.
6. A universal self-sealing flange according to claim 1, characterized in that the mating end surfaces of the main flange (1) and the mating flange (2) are provided with sealing grooves and sealing elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320093654.8U CN220016454U (en) | 2023-01-31 | 2023-01-31 | Universal self-sealing flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320093654.8U CN220016454U (en) | 2023-01-31 | 2023-01-31 | Universal self-sealing flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220016454U true CN220016454U (en) | 2023-11-14 |
Family
ID=88681005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320093654.8U Active CN220016454U (en) | 2023-01-31 | 2023-01-31 | Universal self-sealing flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220016454U (en) |
-
2023
- 2023-01-31 CN CN202320093654.8U patent/CN220016454U/en active Active
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