CN113236868B - Sealing structure - Google Patents
Sealing structure Download PDFInfo
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- CN113236868B CN113236868B CN202110374913.XA CN202110374913A CN113236868B CN 113236868 B CN113236868 B CN 113236868B CN 202110374913 A CN202110374913 A CN 202110374913A CN 113236868 B CN113236868 B CN 113236868B
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- outer ring
- wall
- inner ring
- flange
- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 63
- 230000000149 penetrating effect Effects 0.000 claims abstract description 20
- 230000035515 penetration Effects 0.000 claims abstract description 19
- 239000000945 filler Substances 0.000 claims abstract description 17
- 238000012856 packing Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013028 medium composition Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The application provides a seal structure includes: the wall plate is provided with a penetration hole for penetrating the connecting pipe; the outer ring fixing part is fixedly connected to the outer wall of the wallboard, and the axis of the outer ring fixing part is coaxial with the penetrating hole; the inner ring fixing part is fixedly connected to the outer wall of the wallboard, has the axis coaxial with the penetration hole and is arranged inside the outer ring fixing part, and the minimum inner diameter position of the inner ring fixing part is equal to the inner diameter of the penetration hole; and the sealing filler is filled in a vertical annular cavity between the inner wall of the inner ring fixing part and the outer wall of the connecting pipe. Due to the fact that the inner ring fixing component is added, the inner ring fixing component can determine the machining size according to a new calculation result, the adaptation size of the sealing filler and the connecting pipe is better determined, the design and application of the filler are optimized, and the purpose that a further sealing structure is made under the condition that the original sealing structure is minimally changed is achieved.
Description
Technical Field
The application relates to the technical field of high-temperature equipment connecting pipe sealing, in particular to a sealing structure.
Background
The high temperature equipment in the coal chemical industry and the petrochemical industry often has business turn over takeover and column internals to run through in different cavities, because of different medium composition and temperature in different cavities, in order to avoid appearing the phenomenon of cross-gas each other in different cavities, need set up sealing device on business turn over takeover and internals, simultaneously, the difference of cavity both sides temperature must arouse the expansion difference of takeover and internals, at this moment, except guaranteeing higher sealed effect, still need to ensure takeover and internals can freely expand when high temperature operating mode moves, prevent that high temperature internal stress from arousing equipment damage, thereby influence the normal operating of equipment.
Usually, the connecting pipe and the internal part in the high-temperature equipment adopt a packing function type dynamic sealing structure to solve the problems, but the sealing effect of the dynamic sealing is difficult to calculate by using an accurate calculation formula, and the sealing effect is influenced when the operation working condition fluctuates. Therefore, when the sealing effect of the equipment is poor, the sealing structure of the equipment needs to be redesigned. Because the outer ring of the sealing structure exists, in order to avoid the waste of material and labor cost caused by the large-scale removal of the sealing device, a modification method is urgently needed to optimize the original structure, the cost increase is controlled to be minimum, and the sealing effect is better than before.
Therefore, how to make a further sealing structure under the condition of minimum modification to the original sealing structure is a problem to be solved urgently by the technical personnel in the field at present.
Disclosure of Invention
In view of this, the present application provides a sealing structure to realize that a further sealing structure is formulated under the condition of minimum modification to the original sealing structure.
In order to achieve the above purpose, the present application provides the following technical solutions: a sealing structure, comprising: the wall plate is provided with a penetration hole for penetrating the connecting pipe; the outer ring fixing part is fixedly connected to the outer wall of the wallboard, and the axis of the outer ring fixing part is coaxial with the penetrating hole; the inner ring fixing part is fixedly connected to the outer wall of the wallboard, has the axis coaxial with the penetration hole and is arranged inside the outer ring fixing part, and the minimum inner diameter position of the inner ring fixing part is equal to the inner diameter of the penetration hole; and the sealing filler is filled in a vertical annular cavity between the inner wall of the inner ring fixing part and the outer wall of the connecting pipe.
Optionally, the outer ring fixing member comprises: an outer ring cylinder fixedly connected to the wall plate; an outer ring lower flange fixedly connected to the top surface of the outer ring cylinder; the bolt is connected with the outer ring upper flange above the outer ring lower flange.
Optionally, the outer ring fixing component further includes a plurality of outer ring rib plates fixedly connected between the wall plate and the outer wall of the outer ring cylinder and uniformly distributed in the circumferential direction.
Optionally, the inner ring fixing member includes: the inner ring cylinder is fixedly connected to the wall plate and arranged in the outer ring cylinder, and the inner diameter of the inner ring cylinder is larger than that of the penetration hole; the inner ring flange is provided with a wire planting hole above the outer ring upper flange, the inner ring flange is connected with the wire planting hole above the outer ring upper flange through a bolt, and the inner diameter of the inner ring flange is equal to the inner diameter of the penetrating hole.
Optionally, the inner ring fixing component further comprises a plurality of inner ring rib plates fixedly connected between the inner wall of the outer ring cylinder and the outer wall of the inner ring cylinder and uniformly distributed in the circumferential direction.
Optionally, the bottom surface of the inner ring flange is provided with an annular inclined surface which is inclined upwards from the outer diameter to the inner diameter, and the inclination angle of the annular inclined surface ranges from 5 degrees to 15 degrees.
Optionally, a wide gasket is arranged between the outer ring upper flange and the outer ring lower flange, and a through hole matched with the bolt for connection is formed in the wide gasket.
Optionally, the inner diameter of the flange on the outer ring is equal to the inner diameter of the cylinder of the inner ring.
Optionally, a clearance of 2mm to 5mm is matched between the outer diameter of the connecting pipe penetrating into the penetrating hole and the inner diameter of the penetrating hole.
Optionally, the seal pack comprises at least three layers of seal packs in the vertical direction.
The application provides a seal structure includes: the wall plate is provided with a penetration hole for penetrating the connecting pipe; the outer ring fixing part is fixedly connected to the outer wall of the wallboard, and the axis of the outer ring fixing part is coaxial with the penetrating hole; the inner ring fixing part is fixedly connected to the outer wall of the wallboard, has the axis coaxial with the penetration hole and is arranged inside the outer ring fixing part, and the minimum inner diameter position of the inner ring fixing part is equal to the inner diameter of the penetration hole; and the sealing filler is filled in a vertical annular cavity between the inner wall of the inner ring fixing part and the outer wall of the connecting pipe. The outer ring fixing part is a retention part of an original sealing structure generally, is not convenient to remove completely, still plays a positive role in supporting and fixing the sealing structure, and due to the fact that the inner ring fixing part is added, the inner ring fixing part can determine the machining size according to a new calculation result, better determines the matching size of the packing and the connecting pipe, optimizes the design and application of the sealing packing, and the double-layer fixing part structure of the inner ring and the outer ring enables the sealing structure to have better supporting strength and sealing and fastening characteristics. The further sealing structure is formulated under the condition of minimum modification to the original sealing structure.
Drawings
The novel features believed characteristic of the application are set forth with particularity in the appended claims. A better understanding of the features and advantages of the present application will be obtained by reference to the following detailed description that sets forth illustrative embodiments, in which the principles of the application are utilized, and the accompanying drawings. The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the application. Also, in the drawings, wherein like reference numerals refer to like elements throughout:
FIG. 1 is a schematic cross-sectional structural view of a seal structure provided herein;
FIG. 2 is a top view of a seal provided herein;
in the upper diagram: the structure comprises an outer ring rib plate 1, an outer ring lower flange 2, a wide gasket 3, an outer ring upper flange 4, an inner ring flange 5, a bolt 6, a sealing filler 7, an inner ring cylinder 8, an inner ring rib plate 9 and an outer ring cylinder 10.
Detailed Description
The application provides a seal structure, has realized formulating further seal structure under the minimum condition to former seal structure change.
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
FIG. 1 is a schematic cross-sectional view of a seal provided herein; fig. 2 is a top view of a seal structure provided herein.
The application provides a seal structure includes: the wall plate is provided with a penetration hole for penetrating the connecting pipe; the outer ring fixing part is fixedly connected to the outer wall of the wallboard, and the axis of the outer ring fixing part is coaxial with the penetrating hole; the inner ring fixing part is fixedly connected to the outer wall of the wallboard, has the axis coaxial with the penetration hole and is arranged inside the outer ring fixing part, and the minimum inner diameter position of the inner ring fixing part is equal to the inner diameter of the penetration hole; and the sealing filler 7 is filled in a vertical annular cavity between the inner wall of the inner ring fixing part and the outer wall of the connecting pipe. The outer ring fixing part is a retention part of an original sealing structure generally, is not convenient to remove completely, still plays a positive role in supporting and fixing the sealing structure, and due to the fact that the inner ring fixing part is added, the inner ring fixing part can determine the machining size according to a new calculation result, the matching size of the sealing filler 7 and the connecting pipe is better determined, the design and application of the sealing filler 7 are optimized, and the double-layer fixing part structure of the inner ring and the outer ring enables the sealing structure to have better supporting strength and sealing fastening characteristics. The further sealing structure is formulated under the condition of minimum modification to the original sealing structure. The application provides a simple structure, high efficiency, practical high temperature equipment is taken over and internals packing box formula moves seal structure, and this structure carries out configuration optimization to it under the prerequisite of not demolising former seal structure, has both guaranteed the free inflation of taking over and internals when high temperature equipment moves, has prevented the problem of seal structure both sides string gas again.
In a specific embodiment of the present application, the outer ring fixing member includes: an outer ring cylinder 10 fixedly connected to the wall plate; an outer ring lower flange 2 fixedly connected to the top surface of the outer ring cylinder 10; the bolt is connected with the outer ring upper flange 4 above the outer ring lower flange 2. The outer ring cylinder 10 is a core outer ring fixing component, the outer ring upper flange 4 and the outer ring lower flange 2 are mutually fixed, the inner diameter of the outer ring upper flange 4 is smaller than that of the outer ring cylinder 10, and the inner part of the outer ring upper flange 4 is positioned right above an inner cavity surrounded by the outer ring cylinder 10.
In an embodiment of the present application, the outer ring fixing component further includes a plurality of outer ring rib plates 1 fixedly connected between the wall plate and the outer wall of the outer ring cylinder 10 and uniformly distributed in the circumferential direction. The number of the outer ring rib plates 1 can be 6-12, so that the structural strength can be enhanced.
In a specific embodiment of the present application, the inner ring fixing member includes: the inner ring cylinder 8 is fixedly connected to the wall plate and arranged in the outer ring cylinder 10, and the inner diameter of the inner ring cylinder 8 is larger than that of the penetration hole; the inner ring flange 5 is provided with a wire planting hole above the outer ring upper flange 4, the inner ring flange 5 is connected with the wire planting hole above the outer ring upper flange 4 through a bolt 6, and the inner diameter of the inner ring flange 5 is equal to the inner diameter of the penetrating hole. Because the inner diameter of the inner ring cylinder 8 is larger than the inner diameter of the penetration hole, the wall plate penetrating into the periphery of the penetration hole in the inner ring cylinder 8 forms a supporting ring table for supporting the sealing filler 7; all the sizes of the inner ring cylinder and the inner ring flange 5 can be processed in a zero-motion mode, the filling amount is calculated according to the estimated filling amount of the sealing filler 7 for processing, and the purpose of flexibly adjusting the sealing filler 7 is achieved.
In a specific embodiment of the present application, the inner ring fixing component further includes a plurality of inner ring rib plates 9 fixedly connected between the inner wall of the outer ring cylinder 10 and the outer wall of the inner ring cylinder 8 and uniformly distributed in the circumferential direction. The number of the inner ring rib plates 9 can be 6-12.
In a specific embodiment of the present application, the bottom surface of the inner ring flange 5 is provided with an annular inclined surface inclined upward from the outer diameter to the inner diameter, and the inclination angle of the annular inclined surface ranges from 5 degrees to 15 degrees. The bolts on the inner ring flange 5 play a role of fasteners, and when the fasteners apply pressure to the sealing filler 7, the sealing filler 7 extrudes towards the direction of the connecting pipe, so that better sealing effect is generated.
In a specific embodiment of the present application, a wide gasket 3 is disposed between the outer ring upper flange 4 and the outer ring lower flange 2, and a through hole for connecting a bolt is disposed on the wide gasket 3. The wide washer 3 improves the tightness of the bolted connection.
In a specific embodiment of the present application, the inner diameter of the outer ring upper flange 4 is equal to the inner diameter of the inner ring cylinder 8. By the design, the inner wall of the outer ring upper flange 4 and the inner wall of the inner ring cylinder 8 form a smooth coplanar inner wall.
In a specific embodiment of the application, a clearance of 2 mm-5 mm is matched between the outer diameter of the connecting pipe penetrating into the penetrating hole and the inner diameter of the penetrating hole. The sealing filler 7 can fill the gap, and a sufficient expansion with heat and contraction with cold elastic space is realized.
In a specific embodiment of the present application, the sealing packing 7 comprises at least three layers of sealing packing 7 in the vertical direction. The multilayer sealing filler 7 is beneficial to improving the mechanical property and the thermal property of the sealing structure.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order, and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present application is not limited in this respect.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure may be practiced without these specific details. In some embodiments, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
While exemplary embodiments of the present application have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will now occur to those skilled in the art without departing from the application. It should be understood that various alternatives to the embodiments of the application described herein may be employed in practicing the application. It is intended that the following claims define the scope of the application and that methods and structures within the scope of these claims and their equivalents be covered thereby.
Claims (8)
1. A sealing structure, comprising:
the wall plate is provided with a penetration hole for penetrating the connecting pipe;
outer lane fixed part, its rigid coupling in the wallboard outer wall, and the axis with it is coaxial to wear the hole, outer lane fixed part includes:
an outer ring cylinder (10) fixedly connected to the wall plate;
the outer ring lower flange (2) is fixedly connected to the top surface of the outer ring cylinder (10);
the outer ring upper flange (4) is connected to the upper part of the outer ring lower flange (2) through bolts;
inner circle fixed part, its rigid coupling in the wallboard outer wall, and the axis with it is coaxial to wear the hole, set up in outer lane fixed part's inside, inner circle fixed part's the minimum position of internal diameter with it equals to wear the hole internal diameter, inner circle fixed part includes:
the inner ring cylinder (8) is fixedly connected to the wall plate and arranged in the outer ring cylinder (10), and the inner diameter of the inner ring cylinder (8) is larger than that of the penetrating hole;
the inner ring flange (5) is provided with a wire planting hole above the outer ring upper flange (4), the inner ring flange (5) is connected with the wire planting hole above the outer ring upper flange (4) through a bolt, and the inner diameter of the inner ring flange (5) is equal to the inner diameter of the wire planting hole;
and the sealing filler (7) is filled in a vertical annular cavity between the inner wall of the inner ring fixing part and the outer wall of the connecting pipe.
2. The sealing structure according to claim 1, wherein the outer ring fixing member further comprises a plurality of outer ring rib plates (1) fixedly connected between the wall plate and the outer wall of the outer ring cylinder (10) and uniformly arranged in the circumferential direction.
3. The sealing structure according to claim 1, wherein the inner ring fixing component further comprises a plurality of inner ring rib plates (9) which are fixedly connected between the inner wall of the outer ring cylinder (10) and the outer wall of the inner ring cylinder (8) and are uniformly distributed in the circumferential direction.
4. The seal structure according to claim 3, wherein the bottom surface of the inner ring flange (5) is provided with a circular ring slope inclined upward from the outer diameter to the inner diameter, and the inclination angle of the circular ring slope ranges from 5 degrees to 15 degrees.
5. The sealing structure according to claim 4, characterized in that a wide gasket (3) is arranged between the outer ring upper flange (4) and the outer ring lower flange (2), and the wide gasket (3) is provided with through holes for matching bolt connection.
6. The sealing arrangement according to claim 5, characterised in that the inner diameter of the outer collar flange (4) is equal to the inner diameter of the inner ring cylinder (8).
7. The seal structure according to claim 6, wherein a clearance of 2mm to 5mm is fitted between an outer diameter of the adapter penetrating into the penetration hole and an inner diameter of the penetration hole.
8. The sealing structure according to claim 7, characterized in that the sealing packing (7) comprises at least three layers of sealing packing (7) in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110374913.XA CN113236868B (en) | 2021-04-07 | 2021-04-07 | Sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110374913.XA CN113236868B (en) | 2021-04-07 | 2021-04-07 | Sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113236868A CN113236868A (en) | 2021-08-10 |
| CN113236868B true CN113236868B (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110374913.XA Active CN113236868B (en) | 2021-04-07 | 2021-04-07 | Sealing structure |
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| Country | Link |
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| CN (1) | CN113236868B (en) |
Citations (10)
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| JP2002048489A (en) * | 2000-08-02 | 2002-02-15 | Inax Corp | Seal structure of pipe and tube plate |
| CN202580323U (en) * | 2012-05-03 | 2012-12-05 | 北京天麟汇通设备安装工程有限公司 | Two-side flexible waterproof sleeve pipe |
| CN203797165U (en) * | 2014-04-14 | 2014-08-27 | 中国人民解放军91872部队青岛研究室 | Underwater vehicle cable running through pressure hull sealing leaking resealing device |
| CN203963270U (en) * | 2014-05-26 | 2014-11-26 | 天津市天鹏建筑器材有限公司 | Wall-passing pipe waterproof framework |
| JP2015158236A (en) * | 2014-02-24 | 2015-09-03 | 三菱重工業株式会社 | Pipe seal structure and building |
| CN205534739U (en) * | 2016-04-25 | 2016-08-31 | 山西阳煤化工机械（集团）有限公司 | Seal structure of two -way flange and packing box |
| CN110469722A (en) * | 2019-08-30 | 2019-11-19 | 广船国际有限公司 | Plastics pass through cabin part |
| CN110953406A (en) * | 2019-12-31 | 2020-04-03 | 北京凯盛建材工程有限公司 | Maintenance and transformation method for existing waterproof sealing structure of wall bushing |
| CN210461973U (en) * | 2019-08-07 | 2020-05-05 | 北京中环国投环保技术研究院有限公司 | Novel direct-buried heating power pipeline waterproof sleeve |
| CN212691075U (en) * | 2020-08-03 | 2021-03-12 | 黑龙江省嘉信石化机械有限公司 | Double-flange sealing device for aeration pipeline |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD274888A1 (en) * | 1988-08-15 | 1990-01-03 | Energiewerke Nord Gmbh | DEVICE FOR SEALING THE MAIN HEADLINE OF A REACTOR PRESSURE FAILURE |
| CN104976434A (en) * | 2014-04-14 | 2015-10-14 | 中国人民解放军91872部队青岛研究室 | Underwater vehicle cable penetrating pressure-proof shell leakage sealing and resealing device |
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2021
- 2021-04-07 CN CN202110374913.XA patent/CN113236868B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002048489A (en) * | 2000-08-02 | 2002-02-15 | Inax Corp | Seal structure of pipe and tube plate |
| CN202580323U (en) * | 2012-05-03 | 2012-12-05 | 北京天麟汇通设备安装工程有限公司 | Two-side flexible waterproof sleeve pipe |
| JP2015158236A (en) * | 2014-02-24 | 2015-09-03 | 三菱重工業株式会社 | Pipe seal structure and building |
| CN203797165U (en) * | 2014-04-14 | 2014-08-27 | 中国人民解放军91872部队青岛研究室 | Underwater vehicle cable running through pressure hull sealing leaking resealing device |
| CN203963270U (en) * | 2014-05-26 | 2014-11-26 | 天津市天鹏建筑器材有限公司 | Wall-passing pipe waterproof framework |
| CN205534739U (en) * | 2016-04-25 | 2016-08-31 | 山西阳煤化工机械（集团）有限公司 | Seal structure of two -way flange and packing box |
| CN210461973U (en) * | 2019-08-07 | 2020-05-05 | 北京中环国投环保技术研究院有限公司 | Novel direct-buried heating power pipeline waterproof sleeve |
| CN110469722A (en) * | 2019-08-30 | 2019-11-19 | 广船国际有限公司 | Plastics pass through cabin part |
| CN110953406A (en) * | 2019-12-31 | 2020-04-03 | 北京凯盛建材工程有限公司 | Maintenance and transformation method for existing waterproof sealing structure of wall bushing |
| CN212691075U (en) * | 2020-08-03 | 2021-03-12 | 黑龙江省嘉信石化机械有限公司 | Double-flange sealing device for aeration pipeline |
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| CN113236868A (en) | 2021-08-10 |
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Denomination of invention: Sealing structure Effective date of registration: 20231101 Granted publication date: 20220705 Pledgee: Industrial Bank Co.,Ltd. Taiyuan Branch Pledgor: SHANXI YANGMEI CHEMICAL MACHINERY (GROUP) Co.,Ltd. Registration number: Y2023980063774 |