CN114877144A - Leak-proof sealing interface for gas pipeline - Google Patents
Leak-proof sealing interface for gas pipeline Download PDFInfo
- Publication number
- CN114877144A CN114877144A CN202210496883.4A CN202210496883A CN114877144A CN 114877144 A CN114877144 A CN 114877144A CN 202210496883 A CN202210496883 A CN 202210496883A CN 114877144 A CN114877144 A CN 114877144A
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- Prior art keywords
- gasket
- nested
- flange
- connecting piece
- protruding part
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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
- F16L23/006—Attachments
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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
- F16L23/22—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of a material other than metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The invention belongs to the technical field of gas pipelines, and particularly relates to a leak-proof sealing interface for a gas pipeline, which comprises a flange joint, wherein the flange joint comprises flanges, a reinforcing piece for clamping the gas pipeline, and a gasket arranged between the two flanges; according to the invention, the nested connecting piece is arranged between the flange plate and the gasket, meanwhile, the nested connecting piece is structurally designed, the upper end of the nested connecting piece penetrates through the protruding part, the lower end of the nested connecting piece is provided with the annular convex part, and the annular convex part is clamped with the concave part of the flange plate, so that the installation is convenient, the fastening effect of the gasket and the flange plate can be improved, the sealing performance can be obviously improved, the integral rigidity can be improved while the cost is reduced due to the integrated arrangement of the protruding part and the longitudinal reinforcing rib, and the practicability is high.
Description
Technical Field
The invention belongs to the technical field of gas pipelines, and particularly relates to a leakage-proof sealing interface for a gas pipeline.
Background
The gas pipe is a special pipeline for conveying combustible gas, is a metal gas pipe hose instead of a traditional buckle rubber hose, can overcome the defects that the rubber hose is easy to fall off, age and bite by insects, and has the characteristics of convenience in installation, reliability in connection, corrosion resistance, no gas blockage, good flexibility, long service life, capability of being bent at will without deformation, no gas blockage and the like.
The flange joint is a very common fastener used in a gas pipeline, the main function is connection and sealing, and the leakage of the flange in the prior art can expand rapidly under the flushing of a medium, so that the material loss is caused, the production environment is damaged, the production stop of an enterprise is caused, and the huge economic loss is caused. Poisoning, fire or explosion can also occur if a major accident is the leakage of a toxic, flammable or explosive medium. In modern industry, factors such as corrosive media, temperature, pressure, vibration and the like inevitably leak, and flange leakage is easy to generate due to dimension errors of a sealing surface, aging of a sealing element and improper installation and fastening; on the other hand, under the action of the combined moment of bolt load, gasket counter force and medium pressure, deformation is generated due to insufficient rigidity, so that the pressing force of the gasket is not uniform, and the flange joint is leaked, therefore, the control of the rigidity and the deformation of the flange is the key of the flange joint.
Disclosure of Invention
The present invention is directed to a leak-proof seal for a gas pipeline, which solves the problems of the prior art.
The invention realizes the purpose through the following technical scheme:
a leakproof seal interface for a gas pipeline comprises a flange joint, wherein the flange joint comprises flanges, a reinforcing piece for clamping the gas pipeline, and a gasket arranged between the two flanges;
a nested connecting piece is sleeved between the mounting hole and the gasket, the upper end surface of the nested connecting piece penetrates through the protruding part, and an annular convex part is arranged on the lower end surface of the nested connecting piece and presses the gasket;
the two flanges are connected through bolts, and the bolts penetrate through the nested connecting pieces on the two flanges so that the nested connecting pieces can limit and fix the flanges, the reinforcing pieces and the gaskets.
As a further optimized solution of the present invention, the reinforcement includes an annular reinforcing rib and a longitudinal reinforcing rib for clamping the gas pipe, and the longitudinal reinforcing rib and the protruding portion are integrally injection molded.
As a further optimization scheme of the invention, a plurality of annular convex parts, external threads and sealing rings are sequentially arranged on the end face of the gasket, which is close to the flange plate, and the flange plate is provided with internal threads matched with the external threads.
As a further preferable aspect of the present invention, the lower end surface of the flange is provided with a recessed portion adapted to the annular protrusion.
As a further preferable aspect of the present invention, the annular reinforcing ribs are arranged in two upper and lower rings, and the number of the longitudinal reinforcing ribs is 4.
As a further optimization scheme of the invention, the gasket, the annular convex part and the sealing ring are all formed by plastic rubber injection molding.
As a further optimization scheme of the invention, the side edge of the protruding part is provided with a plurality of limiting assemblies for carrying out limiting early warning on the nested connecting piece penetrating through the protruding part.
As a further optimization scheme of the invention, the limiting assembly comprises a limiting channel arranged on the side edge of the protruding part, a limiting sleeve, a connecting rod penetrating through the limiting sleeve, a pull rod with one end close to the outer side of the protruding part, and an abutting head with the other end located at the inner side of the protruding part are arranged in the limiting channel, wherein a connecting plate is further integrally arranged on the connecting rod, a spring is arranged between the connecting plate and the inner side wall of the limiting channel, a distance sensor is arranged on the end surface of the connecting plate close to the limiting sleeve, an early warning module electrically connected with the output end of the distance sensor is further arranged on the connecting rod, and the early warning module is used for sending out a warning signal when the connecting rod slides when in use.
As a further optimization scheme of the invention, the early warning module comprises a controller and an alarm, the output end of the distance sensor is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the control end of the alarm.
The invention has the beneficial effects that:
(1) according to the invention, the nested connecting piece is arranged between the flange plate and the gasket, meanwhile, the nested connecting piece is structurally designed, so that the upper end of the nested connecting piece penetrates through the protruding part, the lower end of the nested connecting piece is provided with the annular convex part, and the annular convex part is clamped with the concave part of the flange plate, so that the installation is convenient, the fastening effect of the gasket and the flange plate can be improved, the sealing performance can be obviously improved, the integral rigidity can be improved while the cost is reduced due to the integrated arrangement of the protruding part and the longitudinal reinforcing rib, and the practicability is high;
(2) according to the invention, the limiting component is arranged on the protruding part, when the nested connecting piece slides, the friction force between the abutting head and the side wall of the nested connecting piece is increased, and the restoring force of the spring is changed due to the action of long-time friction force, so that the distance sensor can detect the movement of the connecting rod.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a flange joint mounting arrangement of the present invention;
FIG. 3 is an enlarged schematic view of the invention at A in FIG. 2;
FIG. 4 is a schematic structural view of a nested connector of the present invention;
FIG. 5 is a bottom view of the flanged joint of the present invention;
FIG. 6 is a bottom view of the flange joint of the present invention;
FIG. 7 is a schematic view of the construction of the gasket of the present invention;
FIG. 8 is a schematic structural view of a stop assembly of the present invention;
fig. 9 is a cross-sectional enlarged structure diagram of the spacing assembly of the present invention.
In the figure: 1. a valve body; 2. an air intake duct; 3. an exhaust duct; 4. a flange joint; 5. a nested connector; 6. a limiting component; 41. a flange plate; 42. a reinforcement; 43. mounting holes; 44. a projection; 45. a recessed portion; 46. an internal thread; 47. a gasket; 48. the ring is convex; 49. a seal ring; 51. a ring protrusion; 61. a limiting channel; 62. a connecting rod; 63. a pull rod; 64. a limiting sleeve; 65. a butting head; 66. connecting plates; 67. a spring; 68. a distance sensor; 69. and an early warning module.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1-7, a leak-proof seal interface for a gas pipeline includes a flange joint 4, the flange joint 4 includes flanges 41, a reinforcement 42 for clamping the gas pipeline, and a gasket 47 disposed between the two flanges 41, in a gas transmission system, an inlet pipeline 2 and an exhaust pipeline 3 of a gas pressure regulator valve body 1 are both connected by flanges, in this embodiment, a mounting hole 43 is disposed on the flange 41, a protruding portion 44 is disposed on an outer ring portion of the mounting hole 43, and the protruding portion 44 and the reinforcement 42 are integrally disposed, so that the flange rigidity of the flange joint 4 can be improved, the bearing effect of the flange on the resultant moment of bolt load, gasket counterforce and medium pressure in the using process is improved, and the service durability is improved.
The nested connecting piece 5 is sleeved between the mounting hole 43 and the gasket 47, the upper end face of the nested connecting piece 5 penetrates through the protruding part 44, the lower end face of the nested connecting piece 5 is provided with a ring convex part 51, and the ring convex part 51 presses the gasket 47;
in the prior art, the arrangement of the flange joint often has the defect of insufficient gasket pressing force, so that the gasket is loosened, and the sealing performance is insufficient, on the basis, the nested connecting piece 5 is arranged between the flange plate 41 and the gasket 47, meanwhile, the nested connecting piece 5 is structurally designed, so that the upper end of the nested connecting piece penetrates through the protruding part 44, and the lower end of the nested connecting piece is provided with the annular protruding part 51, the installation is convenient, the fastening effect on the gasket 47 and the flange plate 41 can be improved, the sealing performance can be obviously improved, meanwhile, the cost is reduced, the integral rigidity is improved, and the practicability is high due to the integrated arrangement of the protruding part 44 and the reinforcing piece 42.
The two flanges 41 are connected through bolts which penetrate through the nested connecting pieces 5 on the two flanges 41 so that the nested connecting pieces 5 can limit and fix the flanges 41, the reinforcing pieces 42 and the gaskets 47.
In the invention, the components are combined with each other, so that efficient and accurate positioning and installation are facilitated, the stability is high, the sealing performance is good, the structure is simple, the cost is low, the butt joint and installation of the gas pipeline are convenient and rapid, and the application range is wider.
Specifically, the reinforcing member 42 includes an annular reinforcing rib and a longitudinal reinforcing rib for clamping the gas pipe, and the longitudinal reinforcing rib and the protruding portion 44 are integrally injection-molded.
In the invention, the arrangement of the reinforcing part 42 can not only increase the whole rigidity, but also protect the pipeline interface to the maximum extent due to the arrangement of the annular reinforcing ribs and the longitudinal reinforcing ribs, thereby prolonging the service life of the pipeline system.
Specifically, the end face of the gasket 47 close to the flange 41 is sequentially provided with a plurality of annular protrusions 48, external threads and a sealing ring 49, and the flange 41 is provided with internal threads 46 matched with the external threads.
The structure of the gasket 47 is improved in the invention, because the gasket in the prior art can be oxidized and rotted in the long-time use process, the ring rigidity of the mounting surface of the gasket 47 can be improved by arranging the annular convex 48, and meanwhile, when the external thread and the internal thread 46 are in threaded mounting, the annular convex 48 can cover a thread opening (the internal thread 46), so that air and media can be prevented from entering in the use process, and the use durability is improved.
Specifically, the lower end surface of the flange 41 is provided with a recessed portion 45 matched with the annular convex portion 51, and the arrangement of the recessed portion 45 improves the clamping effect when the flange 41 and the gasket 47 are installed, and improves the pressing force on the gasket 47.
Specifically, the annular reinforcing ribs are arranged in an upper circle and a lower circle, and the number of the longitudinal reinforcing ribs is 4.
Specifically, the gasket 47, the annular convex 48 and the sealing ring 49 are all formed by plastic rubber injection molding.
In the invention, the nested connecting piece 5 is arranged between the flange plate 41 and the gasket 47 in the connection of the gas pipeline, meanwhile, the nested connecting piece 5 is structurally designed, the upper end of the nested connecting piece is made to penetrate through the protruding part 44, the lower end of the nested connecting piece is provided with the annular convex part 51, and the annular convex part 51 is clamped with the concave part 45 of the flange plate 41, so that the installation is convenient, and the fastening effect on the gasket 47 and the flange plate 41 can be improved; in addition, the annular convex 48 is arranged, so that the ring rigidity of the mounting surface of the gasket 47 can be improved, and meanwhile, when the external thread and the internal thread 46 are in threaded mounting, the annular convex 48 can cover a thread opening (the internal thread 46), so that air and media can be prevented from entering in the use process, and the use durability is improved; based on the above, when the sealing performance is remarkably improved, the protruding portion 44 and the longitudinal reinforcing rib are integrally arranged, so that the overall rigidity can be improved while the cost is reduced, and the practicability is high.
Example 2
The structure is substantially the same as that in embodiment 1, with the only difference that: further protect protruding portion 44, specifically be the side at protruding portion 44 sets up spacing subassembly 6 for carry out the butt spacing to nested formula connecting piece 5 when using, prevent that the ring flange 41 of gas pipeline interface from producing not hard up in long-term use, when taking place not hard up, spacing subassembly 6 can send alarm signal, and the nested formula connecting piece 5 of the suggestion ring flange 41 junction has not hard up possibility, and the suggestion maintainer need overhaul.
Specifically, the side of the protruding portion 44 is provided with a plurality of limiting assemblies 6 for limiting and early warning the nested connector 5 passing through the protruding portion 44.
Spacing subassembly 6 is including offering the spacing passageway 61 in the protruding portion 44 side, be equipped with stop collar 64 in the spacing passageway 61, the connecting rod 62 that runs through stop collar 64, the pull rod 63 that connecting rod 62 one end is close to the protruding portion 44 outside, the connecting rod 62 other end is located the inboard butt head 65 of protruding portion 44, wherein, still an organic whole is provided with even board 66 on the connecting rod 62, and be equipped with spring 67 between even board 66 and the spacing passageway 61 inside wall, the terminal surface that even board 66 is close to stop collar 64 is equipped with distance sensor 68, still be equipped with the early warning module 69 of being connected with distance sensor 68 output electricity on the connecting rod 62, early warning module 69 is used for giving out alarm signal when taking place to slide connecting rod 62 when using.
The early warning module 69 comprises a controller and an alarm, the output end of the distance sensor 68 is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the control end of the alarm.
In this embodiment, the inner diameter of the protrusion 44 is slightly larger than the outer diameter of the tube wall of the nested connector 5.
In the present embodiment, when the nesting type joint 5 is mounted, the pull rod 63 is pulled to further compress the spring 67, and the spring is mounted so that the side wall of the nesting type joint 5 is abutted by the abutment head 65.
When the flange plate 41 is installed and fixed, the abutting head 65 abuts and is fixed with the outer wall of the nested connecting piece 5 due to the arrangement of the spring 67, so that the fixing effect of the nested connecting piece 5 can be effectively prevented, and the sliding in long-time use can be prevented; when nested formula connecting piece 5 takes place to slide, butt head 65 and the increase of nested formula connecting piece 5 lateral wall frictional force, the effect of long-time frictional force can lead to the restoring force of spring 67 to change, consequently, distance sensor 68 can detect connecting rod 62 and take place to remove, because the setting of early warning module 69, when the distance (being connecting rod 62 displacement) between even board 66 that distance sensor 68 detected and stop collar 64 surpassed the threshold value that sets up in advance, the alarm then can send alarm signal in the early warning module 69, then can remind maintainer this sealed kneck of pipeline to take place to become flexible, in time overhaul, effectively stop the emergence of gas pipeline potential safety hazard.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The utility model provides a leak-proof gas pipeline is with sealed interface, includes flange joint (4), its characterized in that: the flange joint (4) comprises flange plates (41), a reinforcing piece (42) for clamping the gas pipeline and a gasket (47) arranged between the two flange plates (41), wherein the flange plates (41) are provided with mounting holes (43), the outer ring part of each mounting hole (43) is provided with a protruding part (44), and the protruding parts (44) and the reinforcing piece (42) are integrally arranged;
a nested connecting piece (5) is sleeved between the mounting hole (43) and the gasket (47), the upper end face of the nested connecting piece (5) penetrates through the protruding part (44), the lower end face of the nested connecting piece is provided with an annular convex part (51), and the annular convex part (51) presses the gasket (47);
the two flanges (41) are connected through bolts, and the bolts penetrate through the nested connecting pieces (5) on the two flanges (41) so that the nested connecting pieces (5) can limit and fix the flanges (41), the reinforcing pieces (42) and the gaskets (47).
2. A leak-resistant gas conduit seal interface, as claimed in claim 1, wherein: the reinforcing piece (42) comprises an annular reinforcing rib and a longitudinal reinforcing rib which form clamping for the gas pipeline, and the longitudinal reinforcing rib and the protruding portion (44) are integrally formed in an injection molding mode.
3. A leak resistant gas conduit seal interface as recited in claim 1, wherein: the gasket (47) is close to the end face of the flange plate (41) is sequentially provided with a plurality of annular convex protrusions (48), external threads and a sealing ring (49), and the flange plate (41) is provided with internal threads (46) matched with the external threads.
4. A leak resistant gas conduit seal interface as recited in claim 1, wherein: and the lower end surface of the flange plate (41) is provided with a concave part (45) matched with the annular convex part (51).
5. A leak resistant gas conduit seal interface as recited in claim 2, wherein: the annular reinforcing ribs are arranged into an upper ring and a lower ring, and the number of the longitudinal reinforcing ribs is 4.
6. A leak resistant gas conduit seal interface as recited in claim 3, wherein: the gasket (47), the annular convex part (48) and the sealing ring (49) are all formed by plastic rubber injection molding.
7. A leak resistant gas conduit sealing interface as recited in any of claims 1-6, wherein: the side edge of the protruding part (44) is provided with a plurality of limiting assemblies (6) for limiting and early warning the nested connecting piece (5) penetrating through the protruding part (44).
8. A leak resistant gas conduit seal interface as recited in claim 7, wherein: the limiting component (6) comprises a limiting channel (61) arranged on the side edge of the protruding part (44), a limiting sleeve (64), a connecting rod (62) penetrating through the limiting sleeve (64), a pull rod (63) with one end of the connecting rod (62) close to the outer side of the protruding part (44) and an abutting head (65) with the other end of the connecting rod (62) positioned at the inner side of the protruding part (44) are arranged in the limiting channel (61), wherein the connecting rod (62) is also integrally provided with a connecting plate (66), a spring (67) is arranged between the connecting plate (66) and the inner side wall of the limit channel (61), a distance sensor (68) is arranged on the end surface of the connecting plate (66) close to the limiting sleeve (64), the connecting rod (62) is also provided with an early warning module (69) which is electrically connected with the output end of the distance sensor (68), the early warning module (69) is used for sending out a warning signal when the connecting rod (62) slides in use.
9. A leak resistant gas conduit seal interface as recited in claim 8, wherein: the early warning module (69) comprises a controller and an alarm, the output end of the distance sensor (68) is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the control end of the alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210496883.4A CN114877144B (en) | 2022-05-09 | 2022-05-09 | Leak-proof sealing joint for gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210496883.4A CN114877144B (en) | 2022-05-09 | 2022-05-09 | Leak-proof sealing joint for gas pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114877144A true CN114877144A (en) | 2022-08-09 |
| CN114877144B CN114877144B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210496883.4A Active CN114877144B (en) | 2022-05-09 | 2022-05-09 | Leak-proof sealing joint for gas pipeline |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204493946U (en) * | 2014-12-22 | 2015-07-22 | 杭州富阳新锐生物科技有限公司 | A kind of flange connection sealing structure of anti-vibration |
| CN205534733U (en) * | 2016-04-14 | 2016-08-31 | 常州市武进第二法兰锻造有限公司 | Cleaning type flange |
| CN209892907U (en) * | 2019-05-24 | 2020-01-03 | 江苏洲海管业科技有限公司 | Fire control pipe fitting is with preventing leaking leakproofness connector |
| CN110864172A (en) * | 2019-11-27 | 2020-03-06 | 安徽省含山县皖中减速机械有限公司 | Novel compression-resistant flange for pipeline connection |
| CN210739657U (en) * | 2019-09-29 | 2020-06-12 | 苏州阿特密特密封科技有限公司 | Sealing washer and sealing structure |
| CN215410684U (en) * | 2021-05-13 | 2022-01-04 | 江苏金烨钛业有限公司 | High-strength welding neck flange |
-
2022
- 2022-05-09 CN CN202210496883.4A patent/CN114877144B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204493946U (en) * | 2014-12-22 | 2015-07-22 | 杭州富阳新锐生物科技有限公司 | A kind of flange connection sealing structure of anti-vibration |
| CN205534733U (en) * | 2016-04-14 | 2016-08-31 | 常州市武进第二法兰锻造有限公司 | Cleaning type flange |
| CN209892907U (en) * | 2019-05-24 | 2020-01-03 | 江苏洲海管业科技有限公司 | Fire control pipe fitting is with preventing leaking leakproofness connector |
| CN210739657U (en) * | 2019-09-29 | 2020-06-12 | 苏州阿特密特密封科技有限公司 | Sealing washer and sealing structure |
| CN110864172A (en) * | 2019-11-27 | 2020-03-06 | 安徽省含山县皖中减速机械有限公司 | Novel compression-resistant flange for pipeline connection |
| CN215410684U (en) * | 2021-05-13 | 2022-01-04 | 江苏金烨钛业有限公司 | High-strength welding neck flange |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114877144B (en) | 2024-01-30 |
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