CN212509946U - Sealing structure of flange - Google Patents
Sealing structure of flange Download PDFInfo
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- CN212509946U CN212509946U CN202020913023.2U CN202020913023U CN212509946U CN 212509946 U CN212509946 U CN 212509946U CN 202020913023 U CN202020913023 U CN 202020913023U CN 212509946 U CN212509946 U CN 212509946U
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- seal ring
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- 238000007789 sealing Methods 0.000 title claims abstract description 156
- 239000000463 material Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of sealing structures, and discloses a sealing structure of a flange, which comprises a first flange, a second flange and a sealing element, and is characterized in that the first flange is connected with the second flange, a first groove and a second groove corresponding to the first groove are respectively arranged on the connection end surfaces of the first flange and the second flange, and the first groove and the second groove are mutually matched and form a sealing cavity for placing the sealing element; the sealing element comprises a body, a first sealing ring, a second sealing ring and a third sealing ring, the first sealing ring is annularly arranged on the upper side of the body and is abutted to the groove wall of the first groove, the second sealing ring is annularly arranged on the lower side of the body and is abutted to the groove wall of the second groove, and the third sealing ring is annularly arranged on the outer side of the body and is abutted to the joint of the first flange and the second flange. Adopt the utility model has the advantages of sealing performance is strong, and the prevention of seepage performance is strong, and corrosion resisting property is strong, long service life.
Description
Technical Field
The utility model relates to a seal structure technical field especially relates to a seal structure of flange.
Background
In the petroleum, petrochemical and energy industries, valves, pipelines, storage tanks and the like are generally connected by flanges, trapezoidal grooves are respectively formed in two sides of the flanges, sealing elements are placed in the grooves, the sealing elements are generally made of carbon steel or stainless steel, the flanges are pre-tightened by bolts, so that pressure is formed by the flange sealing surfaces to the sealing elements, the sealing elements are compressed and compacted, uneven gaps on the flange sealing surfaces are filled, and the permeation leakage of media through capillary holes in the sealing elements and the interface leakage between the sealing surfaces are prevented, so that the pre-sealing is realized.
However, the elasticity of a general pure metal sealing element is poor, the metal sealing element can generate permanent deformation under the fastening pressure of a bolt, the flange and a connecting bolt can deform due to the rise of medium pressure, the deformation causes the relative separation between sealing surfaces, the fastening force is gradually reduced, after the metal sealing element is used for a period of time, the whole metal sealing system becomes loose, the metal sealing element is not tightly attached to the flange, the metal sealing element and a flange dual piece can both generate deformation, and meanwhile, the flange can leak and the sealing fails due to the corrosion of rainwater, dust and the like;
in addition, a mounting gap is reserved between the flange pair parts, one part of the sealing element is exposed in the air, the flange pair parts and the carbon steel sealing element are easily corroded by rainwater and dust in the air, and a sealing surface is damaged to cause sealing failure. Once the sealing element is damaged, the cost for stopping production and maintaining valves, pipelines and the like is very high, and the leakage of the pipelines is more likely to cause pollution to the environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that a seal structure of flange is provided, its sealing performance is strong, and the prevention of seepage performance is strong, and corrosion resisting property is strong, long service life.
In order to solve the technical problem, the utility model provides a sealing structure of flange, including first flange, second flange and sealing member, its characterized in that, first flange with the second flange is connected, be equipped with respectively on the connection terminal surface of first flange with the second flange and be the first slot of annular arrangement and with the second slot that the first slot corresponds, first slot with the second slot mutually support and form the sealed cavity that can supply the sealing member to place; the sealing element comprises a body, a first sealing ring, a second sealing ring and a third sealing ring, the first sealing ring is annularly arranged on the upper side of the body and abutted against the groove wall of the first groove, the second sealing ring is annularly arranged on the lower side of the body and abutted against the groove wall of the second groove, and the third sealing ring is annularly arranged on the outer side of the body and abutted against the joint of the first flange and the second flange.
As the utility model discloses preferred scheme, the inboard ring of body is equipped with the fourth sealing washer, just the fourth sealing washer with first flange with the junction of second flange offsets.
As the utility model discloses preferred scheme, first flange with the second flange joint back, terminal surface respectively with about the outside of body first slot with the second slot offsets, terminal surface respectively with about the inboard of body first slot with the second slot offsets.
As the utility model discloses preferred scheme, sealed cavity is trapezoidal cavity, terminal surface about the outside of body and inboard terminal surface are with sealed cavity matched with inclined plane.
As a preferred embodiment of the present invention, a first gap is formed between the upper side of the body and the first groove, and the first sealing ring is located in the first gap; and a second gap is formed between the lower side of the body and the second groove, and the second sealing ring is positioned in the second gap.
As the utility model discloses preferred scheme, first flange with behind the second flange joint, first sealing washer the second sealing washer the third sealing washer with the fourth sealing washer all is in by the extrusion state.
As a preferred aspect of the present invention, the first seal ring is located in the periphery of the upper side of the body, and the second seal ring is located in the periphery of the lower side of the body.
As the utility model discloses preferred scheme, the third sealing washer sets firmly the central authorities in the outside of body, the fourth sealing washer sets firmly the central authorities of the inboard of body.
As the preferred scheme of the utility model, the height of first sealing washer is greater than the height in first space 10% -20%, the height in second sealing washer is greater than the height in second space 10% -20%.
As the utility model discloses preferred scheme, the material of body is the metal, the material of first sealing washer the material of second sealing washer the third sealing washer with the material of fourth sealing washer is elastic material.
Implement the utility model discloses a seal structure of flange compares with prior art, has following beneficial effect:
the utility model discloses a body and three sealing washer organic combination, seal first flange and second flange jointly, form pressure and compress tightly the body to the body after first flange and the second flange are connected to make the inner wall interference fit of body and sealed cavity, effectively prevent the medium to carry out the permeability through the inside capillary hole of body and leak or leak through the space between body and the slot; meanwhile, the first sealing ring and the second sealing ring are respectively extruded between the body and the first flange and the second flange, so that the leakage of media through a gap between the body and the groove can be further organized, the sealing ring can still seal even under the condition that the sealing performance of the body is invalid, and the leakage can be prevented; the third sealing washer is extruded in the junction between first flange and the second flange, can prevent effectively that material such as outside rainwater or dust from entering into sealed cavity and even entering into to the flange inside, can prevent that flange and body from being polluted or corroding, when further having strengthened sealing performance, has prolonged life. It is visible, the utility model discloses a sealing performance is strong, and the prevention of seepage performance is strong, and corrosion resisting property is strong, long service life.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of a sealing member according to the present invention.
In the figure: 1. the sealing structure comprises a first flange, 2, a second flange, 3, a connecting gap, 4, a first groove, 5, a second groove, 6, a sealing cavity, 7, a body, 8, a first sealing ring, 9, a second sealing ring, 10, a third sealing ring, 11, a fourth sealing ring, 12, a first gap, 13 and a second gap.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate the orientation or positional relationship, are used in the present invention as being based on the orientation or positional relationship shown in the drawings, and are used only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, the present invention discloses a preferred embodiment of a sealing structure of a flange, including a first flange 1, a second flange 2 and a sealing member, and is characterized in that the first flange 1 is connected with the second flange 2, a first groove 4 arranged in a ring shape and a second groove 5 corresponding to the first groove 4 are respectively arranged on the connection end surfaces of the first flange 1 and the second flange 2, and the first groove 4 and the second groove 5 are mutually matched and form a sealing cavity 6 for placing the sealing member; the sealing member includes body 7, first sealing washer 8, second sealing washer 9 and third sealing washer 10, first sealing washer 8 encircles and is established the upside of body 7 and with the cell wall of first slot 4 offsets, second sealing washer 9 encircles and is established the downside of body 7 and with the cell wall of second slot 5 offsets, third sealing washer 10 encircles and is established the outside of body 7 and with first flange 1 offsets with the junction of second flange 2.
Specifically, the first groove 4 is coaxial with the first flange 1, and the second groove 5 is coaxial with the second flange 2; the body 7 is of an annular structure matched with the sealing cavity 6, and the first sealing ring 8, the second sealing ring 9 and the third sealing ring 10 are all of annular structures coaxial with the body 7.
In this embodiment, the main body 7 is made of metal, and the first seal ring 8, the second seal ring 9, the third seal ring 10 and the fourth seal ring 11 are made of elastic materials; the height of the body 7 is greater than that of the sealing cavity 6, and a connecting gap 3 is formed between the connecting end faces of the first flange 1 and the second flange 2.
Therefore, the utility model discloses a body 7 and the organic combination of three sealing washer, seal first flange 1 and second flange 2 jointly, form pressure and compress tightly body 7 to body 7 after first flange 1 and the connection of second flange 2 to make body 7 and the inner wall interference fit of sealed cavity 6, effectively prevent the medium to carry out the permeability through the inside capillary hole of body 7 and leak or leak through the space between body 7 and the slot; meanwhile, the first sealing ring 8 and the second sealing ring 9 are respectively extruded between the body 7 and the first flange 1 and the second flange 2, so that the leakage of media through a gap between the body 7 and the groove can be further organized, the sealing ring can still be sealed even if the sealing performance of the body 7 fails, and the leakage can be prevented; the third sealing ring 10 is extruded at the joint between the first flange 1 and the second flange 2, so that external rainwater, dust and other substances can be effectively prevented from entering the sealing cavity 6 and even entering the flange, the flange and the body 7 can be prevented from being polluted or corroded, the sealing performance is further enhanced, and the service life is prolonged. It is visible, the utility model discloses a sealing performance is strong, and the prevention of seepage performance is strong, and corrosion resisting property is strong, long service life.
Illustratively, a fourth sealing ring 11 is annularly arranged on the inner side of the body 7, and the fourth sealing ring 11 abuts against the joint of the first flange 1 and the second flange 2. Fourth sealing washer 11 is extruded in the junction between first flange 1 and the second flange 2, can effectively avoid the inside medium of flange to enter into to sealed cavity 6 through the joint gap 3 between first flange 1 and the second flange 2 in, prevents that the medium in the flange from corroding body 7 and making body 7 damage, further increase of service life.
For example, after the first flange 1 is connected with the second flange 2, the outer upper and lower end surfaces of the body 7 respectively abut against the first groove 4 and the second groove 5, and the inner upper and lower end surfaces of the body 7 respectively abut against the first groove 4 and the second groove 5; the sealing cavity 6 is a trapezoidal cavity, and the upper end face and the lower end face of the outer side and the upper end face and the lower end face of the inner side of the body 7 are inclined planes matched with the sealing cavity 6. In this embodiment, the sealed cavity 6 is a hexagonal groove. Of course, in other embodiments, the sealed cavity 6 is a circular groove or a polygonal groove. Due to the design, the structure of the body 7 can be matched with that of the sealed cavity 6, so that the body 7 and the sealed cavity 6 are matched with each other, and the sealing effect is enhanced.
Illustratively, a first gap 12 is formed between the upper side of the body 7 and the first groove 4, and the first sealing ring 8 is positioned in the first gap 12; a second gap 13 is formed between the lower side of the body 7 and the second groove 5, and the second sealing ring 9 is located in the second gap 13.
Exemplarily, after the first flange 1 is connected with the second flange 2, the first seal ring 8, the second seal ring 9, the third seal ring 10 and the fourth seal ring 11 are all in a squeezed state, so that the first seal ring 8, the second seal ring 9, the third seal ring 10 and the fourth seal ring 11 can be guaranteed to be in sealing fit with the seal cavity 6, the leakage of a medium from the periphery of the seal ring is effectively prevented, and the good sealing effect of the sealing element is guaranteed.
Illustratively, the first sealing ring 8 is located on the outer periphery of the upper side of the body 7, and the second sealing ring 9 is located on the outer periphery of the lower side of the body 7, specifically, the first sealing ring 8 and the second sealing ring 9 are symmetrically arranged. Such design can prevent effectively that outside medium from getting into in first space 12 and the second space 13, further avoids body 7 to be corroded to, first sealing washer 8 and the symmetrical setting of second sealing washer 9 can make a sealing washer and the stress of second sealing washer 9 even, have strengthened flange mounting's stability.
Illustratively, the third seal ring 10 is fixed to the center of the outer side of the body 7, and the fourth seal ring 11 is fixed to the center of the inner side of the body 7, that is, the distances between the first seal ring 8 and the second seal ring 9 and the third seal ring 10 are equal, and the distances between the first seal ring 8 and the second seal ring 9 and the fourth seal ring 11 are equal. Due to the design, the third sealing ring 10 and the fourth sealing ring 11 can be just opposite to the connecting gap 3, internal media and external media are further prevented from entering the sealing cavity 6 through the connecting gap 3, the body 7 is prevented from being corroded, and the service life is prolonged.
Illustratively, the height of the first sealing ring 8 is greater than 10% -20% of the height of the first gap 12, the height of the second sealing ring 9 is greater than 10% -20% of the height of the second gap 13, and the height of the third sealing ring 10 and the height of the fourth sealing ring 11 are both greater than 10% -20% of the height of the connecting gap 3. Due to the design, the sealing ring can be always in an extruded state after the first flange 1 is connected with the second flange 2, and good sealing performance of the sealing element is ensured.
In the description of the present invention, it is to be understood that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are used in a generic sense, e.g., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.
Claims (10)
1. A sealing structure of a flange comprises a first flange, a second flange and a sealing element, and is characterized in that the first flange is connected with the second flange, a first groove and a second groove are respectively arranged on the connecting end faces of the first flange and the second flange, the first groove and the second groove are annularly arranged, the second groove corresponds to the first groove, and the first groove and the second groove are mutually matched to form a sealing cavity for placing the sealing element; the sealing element comprises a body, a first sealing ring, a second sealing ring and a third sealing ring, the first sealing ring is annularly arranged on the upper side of the body and abutted against the groove wall of the first groove, the second sealing ring is annularly arranged on the lower side of the body and abutted against the groove wall of the second groove, and the third sealing ring is annularly arranged on the outer side of the body and abutted against the joint of the first flange and the second flange.
2. A sealing structure of a flange according to claim 1, wherein a fourth sealing ring is annularly arranged on the inner side of the body, and the fourth sealing ring abuts against the joint of the first flange and the second flange.
3. A sealing structure of a flange according to claim 1, wherein after the first flange is connected to the second flange, the outer upper and lower end surfaces of the body abut against the first groove and the second groove, respectively, and the inner upper and lower end surfaces of the body abut against the first groove and the second groove, respectively.
4. A sealing structure of a flange according to claim 3, wherein said sealing cavity is a trapezoidal cavity, and both of the outer upper and lower end faces and the inner upper and lower end faces of said body are slopes which are matched with said sealing cavity.
5. A sealing structure of a flange according to claim 2, wherein a first gap is formed between the upper side of the body and the first groove, and the first sealing ring is located in the first gap; and a second gap is formed between the lower side of the body and the second groove, and the second sealing ring is positioned in the second gap.
6. A seal structure of a flange according to claim 5, wherein after the first flange is connected to the second flange, the first seal ring, the second seal ring, the third seal ring and the fourth seal ring are all in a compressed state.
7. A sealing structure of a flange according to claim 5, wherein said first seal ring is located on an outer periphery of an upper side of said body, and said second seal ring is located on an outer periphery of a lower side of said body.
8. A sealing structure of a flange according to claim 7, wherein said third seal ring is fixed to the center of the outer side of said body, and said fourth seal ring is fixed to the center of the inner side of said body.
9. A flange seal according to claim 8, wherein the height of said first seal ring is greater than 10% to 20% of the height of said first gap, and the height of said second seal ring is greater than 10% to 20% of the height of said second gap.
10. A seal structure of a flange according to claim 2, wherein the material of the body is metal, and the material of the first seal ring, the material of the second seal ring, the material of the third seal ring and the material of the fourth seal ring are all elastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020913023.2U CN212509946U (en) | 2020-05-26 | 2020-05-26 | Sealing structure of flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020913023.2U CN212509946U (en) | 2020-05-26 | 2020-05-26 | Sealing structure of flange |
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| Publication Number | Publication Date |
|---|---|
| CN212509946U true CN212509946U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020913023.2U Active CN212509946U (en) | 2020-05-26 | 2020-05-26 | Sealing structure of flange |
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| Country | Link |
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| CN (1) | CN212509946U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609232A (en) * | 2020-05-26 | 2020-09-01 | 广州加士特密封技术有限公司 | Sealing structure of flange |
-
2020
- 2020-05-26 CN CN202020913023.2U patent/CN212509946U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609232A (en) * | 2020-05-26 | 2020-09-01 | 广州加士特密封技术有限公司 | Sealing structure of flange |
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Address after: No. 1 Xinyu North Road, Ningxi Street, Zengcheng District, Guangzhou City, Guangdong Province, 510000 Patentee after: GUANGZHOU JST SEALS TECHNOLOGY Co.,Ltd. Address before: 510530 block B, 718 Kaichuang Avenue, Guangzhou hi tech Industrial Development Zone, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU JST SEALS TECHNOLOGY Co.,Ltd. |