CN111609232A - Sealing structure of flange - Google Patents
Sealing structure of flange Download PDFInfo
- Publication number
- CN111609232A CN111609232A CN202010454790.6A CN202010454790A CN111609232A CN 111609232 A CN111609232 A CN 111609232A CN 202010454790 A CN202010454790 A CN 202010454790A CN 111609232 A CN111609232 A CN 111609232A
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- Prior art keywords
- flange
- sealing
- groove
- seal ring
- ring
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Classifications
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention 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 connecting 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. The invention has the advantages of strong sealing performance, strong seepage-proofing performance, strong corrosion resistance and long service life.
Description
Technical Field
The invention relates to the technical field of sealing structures, in particular to a sealing structure of a 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.
Disclosure of Invention
The invention aims to solve the problem of providing a sealing structure of a flange, which has strong sealing performance, seepage-proofing performance, corrosion resistance and long service life.
In order to solve the technical problem, the invention provides 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 connecting 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 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 a preferable aspect of the present invention, a fourth sealing ring is annularly disposed on an inner side of the body, and the fourth sealing ring abuts against a joint of the first flange and the second flange.
As a preferable aspect of the present invention, after the first flange is connected to the second flange, the upper and lower end surfaces of the outer side of the body abut against the first groove and the second groove, respectively, and the upper and lower end surfaces of the inner side of the body abut against the first groove and the second groove, respectively.
As a preferable scheme of the invention, the sealing cavity 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 are both inclined planes matched with the sealing cavity.
As a preferable aspect of the present invention, a first gap is formed between the upper side of the body and the first groove, and the first seal 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 a preferable aspect of the present invention, 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.
In a preferred aspect of the present invention, the first seal ring is located on an upper outer periphery of the body, and the second seal ring is located on a lower outer periphery of the body.
In a preferred embodiment of the present invention, the third seal ring is fixed to a center of an outer side of the body, and the fourth seal ring is fixed to a center of an inner side of the body.
In a preferred embodiment of the present invention, the height of the first seal ring is greater than 10% to 20% of the height of the first gap, and the height of the second seal ring is greater than 10% to 20% of the height of the second gap.
In a preferred embodiment of the present invention, the body is made of metal, and the first seal ring, the second seal ring, the third seal ring and the fourth seal ring are made of elastic materials.
Compared with the prior art, the sealing structure of the flange has the following beneficial effects:
according to the invention, the body and the three sealing rings are organically combined to jointly seal the first flange and the second flange, and the first flange and the second flange form pressure on the body and compress the body after being connected, so that the body is in interference fit with the inner wall of the sealed cavity, and the medium is effectively prevented from performing permeability leakage through the inner capillary hole of the body or leakage through the gap between the body and the groove; 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. Therefore, the invention has the advantages of strong sealing performance, strong seepage-proofing performance, strong corrosion resistance and long service life.
Drawings
In order to more clearly illustrate the technical solutions 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 provided by 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 clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., used herein are used in the orientation or positional relationship indicated in the drawings, which are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, 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 element, and is characterized in that the first flange 1 is connected with the second flange 2, a first groove 4 and a second groove 5 corresponding to the first groove 4 are respectively arranged on the connecting end surfaces of the first flange 1 and the second flange 2, the first groove 4 and the second groove 5 are mutually matched and form a sealing cavity 6 for placing the sealing element; 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 body 7 and the three sealing rings are organically combined to jointly seal the first flange 1 and the second flange 2, the first flange 1 and the second flange 2 are connected to form pressure on the body 7 and press the body 7 tightly, so that the body 7 is in interference fit with the inner wall of the sealed cavity 6, and the medium is effectively prevented from performing permeability leakage through the inner capillary holes of the body 7 or performing leakage through the gap between the body 7 and the groove; 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. Therefore, the invention has the advantages of strong sealing performance, strong seepage-proofing performance, strong corrosion resistance and 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 the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, either fixedly connected, detachably connected, or integrally connected, unless otherwise explicitly stated or limited; 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 meanings 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 it is therefore to be understood that the invention is not limited by the scope of the appended claims.
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 |
|---|---|---|---|
| CN202010454790.6A CN111609232A (en) | 2020-05-26 | 2020-05-26 | Sealing structure of flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010454790.6A CN111609232A (en) | 2020-05-26 | 2020-05-26 | Sealing structure of flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111609232A true CN111609232A (en) | 2020-09-01 |
Family
ID=72198277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010454790.6A Pending CN111609232A (en) | 2020-05-26 | 2020-05-26 | Sealing structure of flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111609232A (en) |
-
2020
- 2020-05-26 CN CN202010454790.6A patent/CN111609232A/en active Pending
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Address after: No. 1 Xinyu North Road, Ningxi Street, Zengcheng District, Guangzhou City, Guangdong Province, 510000 Applicant 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 Applicant before: GUANGZHOU JST SEALS TECHNOLOGY Co.,Ltd. |