CN110529680B - Multiple seal corrosion-resistant flange - Google Patents
Multiple seal corrosion-resistant flange Download PDFInfo
- Publication number
- CN110529680B CN110529680B CN201910928212.9A CN201910928212A CN110529680B CN 110529680 B CN110529680 B CN 110529680B CN 201910928212 A CN201910928212 A CN 201910928212A CN 110529680 B CN110529680 B CN 110529680B
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- sealing
- flange
- flange piece
- piece
- groove
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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
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
Compared with the prior art, the invention has reasonable design and simple structure, greatly enhances the sealing performance of the flange sealing piece by arranging the first sealing flange piece, the second sealing flange piece and the flange piece fastening sleeve, reduces the possibility of leakage of corrosive fluid from a pipeline, further enhances the integral sealing performance of the flange sealing structure by arranging a plurality of sealing rings, and reduces the possibility of leakage of fluid from the pipeline to the minimum.
Description
[ Field of technology ]
The invention relates to the technical field of fasteners, in particular to a multi-seal corrosion-resistant flange.
[ Background Art ]
Flanges, also known as flange collars or lugs. The flange is a part for connecting the shafts and is used for connecting the pipe ends; there are also flanges for use on the equipment access ports for connection between two equipment, such as speed reducer flanges. The flange connection or the flange joint refers to detachable connection which is formed by connecting a flange, a gasket and a bolt with each other to form a group of combined sealing structures.
The existing flange is mainly formed by connecting a flange, a gasket and bolts, when corrosive high-pressure fluid is transported, fluid leakage is easy to occur at the joint of the flange, and the leak of the transportation pipeline system is reduced due to corrosion of the pipeline, so that unnecessary loss is caused, and therefore, a multiple-seal corrosion-resistant flange is necessary to be provided.
[ Invention ]
The invention aims to solve the problems in the prior art, and provides the multi-seal corrosion-resistant flange which is reasonable in design and simple in structure, the sealing performance of the flange sealing piece is greatly enhanced by arranging the first sealing flange piece, the second sealing flange piece and the flange piece fastening sleeve, the possibility of leakage of corrosive fluid from a pipeline is reduced, the integral sealing performance of the flange sealing structure is further enhanced by arranging a plurality of sealing rings, the possibility of leakage of the fluid from the pipeline is reduced to the minimum, and the multi-seal corrosion-resistant flange is worthy of popularization.
In order to achieve the above purpose, the invention provides a multi-seal corrosion-resistant flange, which comprises a first connecting column, a first flange surface, a second connecting column, a second flange surface, a first seal flange piece, a second seal flange piece and a flange piece fastening sleeve, wherein the right end of the first connecting column is provided with the first flange surface, the right side of the first flange surface is provided with the second connecting column, the left end of the second connecting column is provided with the second flange surface, a first seal flange piece and a second seal flange piece are arranged between the second flange surface and the opposite sides of the first flange surface, the first seal flange piece is positioned on the left side of the second seal flange piece, and the outer sides of the first seal flange piece and the second seal flange piece are sleeved with the flange piece fastening sleeve.
Preferably, a first through hole is formed in the first connecting column, a first check groove is formed in the inner wall of the first through hole, the cross section of the first check groove is isosceles trapezoid, and the first check groove is located at the right half part of the inner wall of the first through hole.
Preferably, the first flange face is provided with a plurality of first connecting holes, the number of the first connecting holes is 4, the first connecting holes are uniformly distributed in a circular ring shape along the circle center of the first flange face, and the first flange face is fixedly arranged on the right end face of the first connecting column in a welding mode.
Preferably, the inner wall of the second connecting column is provided with a second through hole, the inner wall of the second through hole is provided with a second check groove, the section of the second check groove is isosceles trapezoid, and the second check groove is positioned at the left half part of the inner wall of the second through hole.
Preferably, the second flange surface is provided with a plurality of second connecting holes, the number of the second connecting holes is 4, the second connecting holes are uniformly distributed in a circular ring shape along the circle center of the second flange surface, and the second flange surface is fixedly arranged on the left end surface of the second connecting column in a welding mode.
Preferably, the outer side wall of the first sealing flange piece is provided with first external threads, the first sealing flange piece is provided with a third connecting hole, the left end of the first sealing flange piece is provided with a first connecting bulge, the first connecting bulge is provided with a first sealing ring mounting groove, a first sealing ring is arranged in the first sealing ring mounting groove, the right end of the first sealing flange piece is provided with a sealing bulge loop, and the inner side of the sealing bulge loop is provided with a coordination groove.
Preferably, the outer side wall of the second sealing flange piece is provided with a second external thread, the second sealing flange piece is provided with a fourth connecting hole, the right end of the second sealing flange piece is provided with a second connecting protrusion, the second connecting protrusion is provided with a second sealing ring mounting groove, a second sealing ring is arranged in the second sealing ring mounting groove, the left end of the second sealing flange piece is provided with a sealing ring groove corresponding to the sealing protrusion ring, and the bottom of the sealing ring groove is provided with a third sealing ring.
Preferably, the inner wall of the flange plate fastening sleeve is provided with a first internal thread and a second internal thread, the first internal thread corresponds to the first external thread, the second internal thread corresponds to the second external thread, the threads of the first internal thread and the second internal thread are opposite in rotation direction, and the thread lengths of the first internal thread and the second internal thread are the same.
The invention has the beneficial effects that: the invention has reasonable design and simple structure, greatly enhances the sealing performance of the flange sealing piece and reduces the possibility of leakage of corrosive fluid from the pipeline by arranging the first sealing flange piece, the second sealing flange piece and the flange piece fastening sleeve; by arranging a plurality of sealing rings, the overall tightness of the flange sealing structure is further enhanced, and the possibility of leakage of fluid from the pipeline is reduced to the minimum; by arranging the sealing bulge loop, the sealing ring groove and the coordination groove, the corrosive fluid in the pipeline cannot contact the third sealing ring positioned in the sealing ring groove by utilizing the limitation of the left metal wall of the sealing ring groove, so that the service life of the third sealing ring is prolonged, and the overhaul frequency and frequency of the flange are reduced.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
[ Description of the drawings ]
FIG. 1 is a schematic structural view of a multi-seal corrosion resistant flange of the present invention.
In the figure: 1-first connecting column, 11-first through hole, 12-first check groove, 2-first flange surface, 21-first connecting hole, 3-second connecting column, 31-second through hole, 32-second check groove, 4-second flange surface, 41-second connecting hole, 5-first sealing flange piece, 51-first external thread, 52-third connecting hole, 53-first connecting protrusion, 54-first sealing ring mounting groove, 55-first sealing ring, 56-sealing protrusion ring, 57-coordination groove, 6-second sealing flange piece, 61-second external thread, 62-fourth connecting hole, 63-second connecting protrusion, 64-second sealing ring mounting groove, 65-second sealing ring, 66-sealing ring groove, 67-third sealing ring, 7-flange piece fastening sleeve, 71-first internal thread, 72-second internal thread.
[ Detailed description ] of the invention
Referring to the drawings, the multi-seal corrosion-resistant flange comprises a first connecting column 1, a first flange face 2, a second connecting column 3, a second flange face 4, a first sealing flange piece 5, a second sealing flange piece 6 and a flange piece fastening sleeve 7, wherein the first flange face 2 is arranged at the right end of the first connecting column 1, the second connecting column 3 is arranged at the right side of the first flange face 2, the second flange face 4 is arranged at the left end of the second connecting column 3, a first sealing flange piece 5 and a second sealing flange piece 6 are arranged between the second flange face 4 and the opposite sides of the first flange face 2, the first sealing flange piece 5 is positioned at the left side of the second sealing flange piece 6, and the flange piece fastening sleeve 7 is sleeved outside the first sealing flange piece 5 and the second sealing flange piece 6.
The first connecting column 1 is internally provided with a first through hole 11, the inner wall of the first through hole 11 is provided with a first check groove 12, the section of the first check groove 12 is isosceles trapezoid, and the first check groove 12 is positioned at the right half part of the inner wall of the first through hole 11.
The first flange surface 2 is provided with a plurality of first connecting holes 21, the number of the first connecting holes 21 is 4, the first connecting holes 21 are uniformly distributed in a circular ring shape along the center of the first flange surface 2, and the first flange surface 2 is fixedly mounted on the right end face of the first connecting column 1 in a welding mode.
The inner wall of the second connecting column 3 is provided with a second through hole 31, the inner wall of the second through hole 31 is provided with a second check groove 32, the section of the second check groove 32 is isosceles trapezoid, and the second check groove 32 is located at the left half part of the inner wall of the second through hole 31.
The second flange faces 4 are provided with a plurality of second connecting holes 41, the number of the second connecting holes 41 is 4, the second connecting holes 41 are uniformly distributed in a circular ring shape along the circle center of the second flange faces 4, and the second flange faces 4 are fixedly mounted on the left end face of the second connecting column 3 in a welding mode.
The outer side wall of the first sealing flange piece 5 is provided with a first external thread 51, the first sealing flange piece 5 is provided with a third connecting hole 52, the left end of the first sealing flange piece 5 is provided with a first connecting protrusion 53, the first connecting protrusion 53 is provided with a first sealing ring mounting groove 54, the first sealing ring mounting groove 54 is internally provided with a first sealing ring 55, the right end of the first sealing flange piece 5 is provided with a sealing protrusion ring 56, and the inner side of the sealing protrusion ring 56 is provided with a coordination groove 57.
The outer side wall of the second sealing flange piece 6 is provided with a second external thread 61, the second sealing flange piece 6 is provided with a fourth connecting hole 62, the right end of the second sealing flange piece 6 is provided with a second connecting protrusion 63, the second connecting protrusion 63 is provided with a second sealing ring mounting groove 64, the second sealing ring mounting groove 64 is internally provided with a second sealing ring 65, the left end of the second sealing flange piece 6 is provided with a sealing ring groove 66 corresponding to the sealing protrusion ring 56, and the bottom of the sealing ring groove 66 is provided with a third sealing ring 67.
The inner wall of the flange fastening sleeve 7 is provided with a first internal thread 71 and a second internal thread 72, the first internal thread 71 corresponds to the first external thread 51, the second internal thread 72 corresponds to the second external thread 61, the threads of the first internal thread 71 and the second internal thread 72 are opposite in rotation direction, and the thread lengths of the first internal thread 71 and the second internal thread 72 are the same.
The working process of the invention comprises the following steps:
The invention relates to a multi-seal corrosion-resistant flange, which is characterized in that in the working process:
First,: the first sealing ring 55, the second sealing ring 65 and the third sealing ring 67 are conveniently installed inside the first sealing ring installation groove 54, the second sealing ring installation groove 64 and the sealing ring groove 66, and then the first sealing flange piece 5 and the second sealing flange piece 6 are screwed into the flange piece fastening sleeve 7, so that the sealing bulge loop 56 is clamped inside the sealing ring groove 66, and the third connecting hole 52 is aligned with the fourth connecting hole 62;
Secondly: the first and second coupling protrusions 53 and 63 are inserted into the first and second through holes 11 and 31, respectively, and the first and second packing rings 55 and 65 are inserted into the first and second check grooves 12 and 32 while aligning the first and second coupling holes 21 and 41, and the third and fourth coupling holes 52 and 62;
Finally: the whole flange sealing assembly is connected with the first connecting column 1 and the second connecting column 3 through external connecting bolts, and the assembly is completed.
Compared with the prior art, the invention has reasonable design and simple structure, greatly enhances the sealing performance of the flange sealing piece and reduces the possibility of leakage of corrosive fluid from the pipeline by arranging the first sealing flange piece 5, the second sealing flange piece 6 and the flange piece fastening sleeve 7; by arranging a plurality of sealing rings, the overall tightness of the flange sealing structure is further enhanced, and the possibility of leakage of fluid from the pipeline is reduced to the minimum; by arranging the sealing bulge loop 65, the sealing ring groove 66 and the coordination groove 57, the corrosive fluid in the pipeline cannot contact the third sealing ring 67 positioned in the sealing ring groove 66 by utilizing the limitation of the left metal wall of the sealing ring groove 66, so that the service life of the third sealing ring 67 is prolonged, and the overhaul frequency of the flange are reduced.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (4)
1. A multiple seal corrosion resistant flange, characterized in that: including first spliced pole (1), first flange face (2), second spliced pole (3), second flange face (4), first sealing flange piece (5), second sealing flange piece (6) and flange piece adapter sleeve (7), the right-hand member of first spliced pole (1) is equipped with first flange face (2), the right side of first flange face (2) is equipped with second spliced pole (3), the left end of second spliced pole (3) is equipped with second flange face (4), be equipped with first sealing flange piece (5) and second sealing flange piece (6) between the opposite side of second flange face (4) and first flange face (2), first sealing flange piece (5) are located the left side of second sealing flange piece (6), the outside cover of first sealing flange piece (5) and second sealing flange piece (6) is equipped with flange piece adapter sleeve (7), be equipped with first external screw thread (51) on the lateral wall of first sealing flange piece (5), be equipped with first sealing washer (54) on first sealing flange piece (5) the opposite side, be equipped with first sealing washer (54) on the first sealing groove (54), the right end of the first sealing flange piece (5) is provided with a sealing bulge loop (56), the inner side of the sealing bulge loop (56) is provided with a coordination groove (57), the outer side wall of the second sealing flange piece (6) is provided with a second external thread (61), the second sealing flange piece (6) is provided with a fourth connecting hole (62), the right end of the second sealing flange piece (6) is provided with a second connecting bulge (63), the second connecting bulge (63) is provided with a second sealing ring mounting groove (64), the second sealing ring mounting groove (64) is internally provided with a second sealing ring (65), the left end of the second sealing flange piece (6) is provided with a sealing ring groove (66) corresponding to the sealing bulge loop (56), the bottom of the sealing ring groove (66) is provided with a third sealing ring (67), the inner wall of the flange piece fastening sleeve (7) is provided with a first internal thread (71) and a second internal thread (72), the first internal thread (71) corresponds to the first external thread (51), the second internal thread (72) corresponds to the second internal thread (71) and the second internal thread (72) is provided with the same length as the first internal thread (71), the inner wall of the first through hole (11) is provided with a first check groove (12), the section of the first check groove (12) is isosceles trapezoid, and the first check groove (12) is positioned at the right half part of the inner wall of the first through hole (11).
2. A multi-seal corrosion resistant flange according to claim 1, wherein: be equipped with a plurality of first connecting holes (21) on first flange face (2), the quantity of first connecting hole (21) is 4, first connecting hole (21) are ring form evenly distributed along the centre of a circle of first flange face (2), first flange face (2) are through welded mode fixed mounting on the right-hand member face of first spliced pole (1).
3. A multi-seal corrosion resistant flange according to claim 1, wherein: the inner wall of the second connecting column (3) is provided with a second through hole (31), the inner wall of the second through hole (31) is provided with a second check groove (32), the section of the second check groove (32) is isosceles trapezoid, and the second check groove (32) is positioned at the left half part of the inner wall of the second through hole (31).
4. A multi-seal corrosion resistant flange according to claim 1, wherein: be equipped with a plurality of second connecting holes (41) on second flange face (4), the quantity of second connecting hole (41) is 4, second connecting hole (41) are ring form evenly distributed along the centre of a circle of second flange face (4), second flange face (4) are through welded mode fixed mounting on the left end face of second spliced pole (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910928212.9A CN110529680B (en) | 2019-09-28 | 2019-09-28 | Multiple seal corrosion-resistant flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910928212.9A CN110529680B (en) | 2019-09-28 | 2019-09-28 | Multiple seal corrosion-resistant flange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110529680A CN110529680A (en) | 2019-12-03 |
| CN110529680B true CN110529680B (en) | 2024-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910928212.9A Active CN110529680B (en) | 2019-09-28 | 2019-09-28 | Multiple seal corrosion-resistant flange |
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| Country | Link |
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| CN (1) | CN110529680B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536338B (en) * | 2020-05-12 | 2022-05-06 | 山西腾达锻造股份有限公司 | Corrosion-resistant flat welding flange and processing method thereof |
| CN111828752B (en) * | 2020-07-14 | 2021-12-03 | 中航天建设工程集团有限公司 | Flexible connecting device for pipeline |
| CN112212112A (en) * | 2020-10-23 | 2021-01-12 | 杭州兔研工业设计有限公司 | Thermal insulation pipeline compensator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080002543U (en) * | 2007-01-08 | 2008-07-11 | 새한합성산업 주식회사 | Synthetic Resin Flange Tube |
| CN207648308U (en) * | 2017-12-12 | 2018-07-24 | 禹州市神运机械有限公司 | A kind of pipe flange |
| CN211289095U (en) * | 2019-09-28 | 2020-08-18 | 浙江亚泰连接盘制造有限公司 | Multi-sealing corrosion-resistant flange |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2166296Y (en) * | 1993-03-04 | 1994-05-25 | 吕铁超 | Fast connecting flange for valve pipeline |
| KR20000018693U (en) * | 1999-03-25 | 2000-10-25 | 정몽규 | Couple means of air conditioner pipe |
| JP3115875U (en) * | 2005-08-18 | 2005-11-17 | 上品綜合工業股▲ふん▼有限公司 | Pipe fitting |
| KR20120119653A (en) * | 2011-04-22 | 2012-10-31 | 주식회사 한국피이엠 | Pipe connecting device, piping having the same, repair method and construction method for piping using the same |
| CN204512721U (en) * | 2014-12-29 | 2015-07-29 | 常州市常武欣摄石化配件有限公司 | High-pressure anticorrosion flange |
| CN204986111U (en) * | 2015-09-24 | 2016-01-20 | 江苏广通管业制造有限公司 | Twist box -like novel flange |
| CN205978899U (en) * | 2016-08-16 | 2017-02-22 | 郑州科林车用空调有限公司 | Spacing seal structure of multiple direction of passenger train idle call pipeline |
| CN207539504U (en) * | 2017-12-01 | 2018-06-26 | 天津中瑞邦络克管道联接技术有限公司 | A kind of plastic clasp connector |
| CN208153909U (en) * | 2018-05-14 | 2018-11-27 | 湖北典辉科技实业有限公司 | A kind of flange cover attaching structure of band precoating sealant |
| CN208871205U (en) * | 2018-08-09 | 2019-05-17 | 杭州赛东科技有限公司 | A kind of flange seal mat structure |
| CN208804364U (en) * | 2018-08-29 | 2019-04-30 | 东莞市泰丰空调制冷设备有限公司 | A kind of attachment device of loop adapter tube |
| CN209084226U (en) * | 2018-11-01 | 2019-07-09 | 中交二公局电务工程有限公司 | A kind of New type water pipe connector of tamper-proof metal pipeline anticorrosive coating |
| CN110260070B (en) * | 2019-06-22 | 2021-03-16 | 山西昊坤法兰股份有限公司 | Liquid pipeline flange |
-
2019
- 2019-09-28 CN CN201910928212.9A patent/CN110529680B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080002543U (en) * | 2007-01-08 | 2008-07-11 | 새한합성산업 주식회사 | Synthetic Resin Flange Tube |
| CN207648308U (en) * | 2017-12-12 | 2018-07-24 | 禹州市神运机械有限公司 | A kind of pipe flange |
| CN211289095U (en) * | 2019-09-28 | 2020-08-18 | 浙江亚泰连接盘制造有限公司 | Multi-sealing corrosion-resistant flange |
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| CN110529680A (en) | 2019-12-03 |
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Effective date of registration: 20240816 Address after: No. 7 Yulong Road, Qujiang District, Quzhou City, Zhejiang Province, 324000 Applicant after: Quzhou Yatai Connecting Plate Co.,Ltd. Country or region after: China Address before: 314300 Xincheng community, Xitangqiao street, Haiyan County, Jiaxing City, Zhejiang Province Applicant before: ZHEJIANG YATAI CONNECTION PAD MANUFACTURING Co.,Ltd. Country or region before: China |
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