CN118117516B - Submarine cable protection tube connecting device - Google Patents
Submarine cable protection tube connecting device Download PDFInfo
- Publication number
- CN118117516B CN118117516B CN202410523811.3A CN202410523811A CN118117516B CN 118117516 B CN118117516 B CN 118117516B CN 202410523811 A CN202410523811 A CN 202410523811A CN 118117516 B CN118117516 B CN 118117516B
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- piece
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- 230000008859 change Effects 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 description 12
- 238000001125 extrusion Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 6
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
- H02G3/0616—Joints for connecting tubing to casing
- H02G3/0691—Fixing tubing to casing by auxiliary means co-operating with indentations of the tubing, e.g. with tubing-convolutions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention relates to the technical field of submarine cable installation, in particular to a submarine cable protection tube connecting device, which comprises: a first pipe and a second pipe; the first pipe fitting end is provided with a first spherical pipe piece, the second pipe fitting end is provided with a second spherical pipe piece, the second spherical pipe piece is sleeved in the first spherical pipe piece to form spherical hinge connection, and the inner wall of the first spherical pipe piece far away from the second spherical pipe piece is provided with a strain gauge; the outer wall of the first pipe fitting is provided with a driving rod, the end part of the driving rod is provided with a gear, the outer wall of the second pipe fitting is provided with a driven rod, and the driven rod is provided with a rack part meshed with the gear; when the pressure of the strain gauge exceeds a preset value, the gear rotates to change the first pipe fitting and the second pipe fitting from a collinear state to a bending state. The invention solves the problem that the submarine cable protection tube is affected by temperature difference to cause the damage of the connecting structure.
Description
Technical Field
The invention relates to the technical field of submarine cable installation, in particular to a submarine cable protection tube connecting device.
Background
The submarine cable is a cable for submarine telecommunication or power transmission, and is widely applied to the fields of intercontinental communication, island interconnection, offshore oil and gas platforms, offshore wind power and the like. In order to protect the cable, a cable protection tube is usually sleeved outside the cable, and the cable protection tube is made of steel tubes, hard plastic tubes, ductile cast iron tubes and the like, wherein the ductile cast iron tubes have the characteristics of high strength, wear resistance, corrosion resistance, long protection period and the like and are widely used. In order to facilitate transportation and loading of the construction ship, the length of the ductile cast iron cable protection pipe is generally about 500 meters, and a plurality of cable protection pipes are sequentially connected through a connecting structure and are paved on the seabed to protect cables.
The traditional cable protection pipe is connected through a flange, but sundries such as gravel, barren rock, sediment and the like are often needed to be avoided in the laying process of the submarine cable, the trend of the cable is also needed to be changed according to the topography of the seabed, and the use requirement of the submarine cable protection pipe cannot be met by the traditional cable protection pipe. In order to solve the problems, a novel submarine cable protection tube is proposed, namely, two sections of cable protection tubes are connected through a half type spherical hinge structure and can rotate in all directions, so that the submarine cable has certain bending flexibility. When the submarine earthquake or seabed transition occurs, the protective pipe spherical hinge can rotate, so that vibration or impact energy is absorbed, and the cable can be effectively protected from vibration or impact damage.
In addition, due to the fact that the protection pipes are connected through the spherical hinges and are not in the same straight line but have a certain angle after being laid, the angle between the two protection pipes can be automatically changed under the action of the spherical hinges to compensate for thermal expansion and cold contraction even when thermal expansion and cold contraction are carried out.
However, it has been found during long-term use that some specific relatively flat seafloors may sporadically exhibit damage to the ball joints, which has not been solved. Long-term studies have found that the reason is: when the temperature decreases, the length of the protective tube contracts, causing the plurality of protective tubes to be straightened, i.e., the plurality of protective tubes lie in a straight line. However, when the temperature rises, since no relative angle exists between the adjacent protective tubes at this time, especially when a plurality of continuous protective tubes are all positioned on the same straight line, the angle between the two protective tubes cannot be automatically changed when the protective tubes are thermally expanded, so that the length can be compensated. For example: when the angle between the protection pipes is 2 degrees, the angle can be gradually changed into 3 degrees and 4 degrees under the action of thermal expansion, but when the angle between the protection pipes is close to 0 degree, the angle can not be automatically changed under the action of thermal expansion. Therefore, the temperature change causes the cable protection tube to expand with heat and contract with cold, thereby causing the damage of the connection structure of the protection tube.
Disclosure of Invention
Aiming at the defects existing in the prior art, the embodiment of the invention aims to provide a submarine cable protection tube connecting device so as to solve the problem that a submarine cable protection tube is affected by temperature difference to cause damage to a connecting structure.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a submarine cable sheath connection device comprising: a first pipe and a second pipe; the first pipe fitting end is provided with a first spherical pipe piece, the second pipe fitting end is provided with a second spherical pipe piece, the second spherical pipe piece is sleeved in the first spherical pipe piece to form spherical hinge connection, and the inner wall of the first spherical pipe piece far away from the second spherical pipe piece is provided with a strain gauge; the outer wall of the first pipe fitting is provided with a driving rod, the end part of the driving rod is provided with a gear, the outer wall of the second pipe fitting is provided with a driven rod, and the driven rod is provided with a rack part meshed with the gear; when the pressure of the strain gauge exceeds a preset value, the gear rotates to change the first pipe fitting and the second pipe fitting from a collinear state to a bending state.
Preferably, the driving rod is of an arc-shaped structure, the driven rod is of an arc-shaped structure, the circle centers of the driving rod and the driven rod are coincident with the rotation center of the spherical hinge, and the driven rod is arranged on one side, far away from the first spherical segment, of the driving rod.
Preferably, the rack part is located at one side of the driven rod, which faces the second spherical duct piece, free parts are arranged at two sides of the rack part, and the distance from the inner side surface of the free part to the second spherical duct piece is greater than the distance from the inner side surface of the rack part to the second spherical duct piece.
Preferably, the angle formed by the end surfaces at two sides of the rack part is 6-10 degrees.
Preferably, the driving rod is provided with a first stop rod and a second stop rod, and the first stop rod and the second stop rod are positioned at two sides of the gear; the driven rod is provided with a first limiting rod and a second limiting rod, and the first limiting rod and the second limiting rod are respectively positioned on two sides of the free portion.
Preferably, the outer wall of the first pipe fitting is rotationally connected with a first swivel, and the end part of the driving rod is fixedly connected with the first swivel; the outer wall of the second pipe fitting is rotationally connected with a second swivel, and the end part of the driven rod is fixedly connected with the second swivel.
Preferably, a sliding frame is arranged at one end of the driven rod, which is far away from the second pipe fitting, the sliding frame is provided with a hollow slot hole, and the driving rod is inserted into the hollow slot hole of the sliding frame.
Preferably, a sealing groove is arranged in the first spherical segment, the sealing groove is arranged on the inner wall of one side of the first spherical segment, which is close to the second spherical segment, and a sealing ring is arranged in the sealing groove.
Preferably, the outer side of the end of the second spherical segment is provided with a bullnose, and the inner side of the end of the second spherical segment is provided with a fillet.
Preferably, the connection means is arranged between two cable guards of the flat sea floor.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:
when the temperature of a plurality of cable protection pipes pulled into a straight line rises, the cable protection pipes expand, at the moment, because an initial angle does not exist between adjacent protection pipes, the second spherical pipe piece can extrude the left side (namely the position of the strain gauge) of the first spherical pipe piece, when the extrusion exceeds a preset value, the extrusion degree between the first spherical pipe piece and the second spherical pipe piece is lighter, the driving rod and the driven rod relatively move through gear rotation, and then the two adjacent pipe pieces are driven to form an initial angle, and then under the action of thermal expansion, the angle between the adjacent pipe pieces is gradually increased so as to compensate the thermal expansion elongation, and damage to the protection pipes or the connecting structure is avoided.
Concave tables of free parts are arranged on two sides of the rack part, and when the two segments are separated from a collinear state, the two segments are separated from the matching of the driving rod and the driven rod. Through the arrangement of the middle rack part and the free parts on the two sides, two adjacent duct pieces can be separated from a collinear state, and the free adjustment of the follow-up spherical hinge cannot be hindered.
The gear can be protected through the arrangement of the two stop rods, and the wear caused by the fact that the end of the spherical segment is propped against the outer wall of the opposite-side pipe fitting can be avoided through the cooperation of the two stop plates and the two stop rods, so that the service life is prolonged.
Additional aspects of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is an external view of a connecting device according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a connection device according to an embodiment of the present invention;
FIG. 3 is a schematic view of a first tubular member according to an embodiment of the present invention;
FIG. 4 is a schematic view of a second tubular member according to an embodiment of the present invention;
FIG. 5 is a schematic view of the second tubular member rotated downward to an extreme position in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of the second tubular member rotated upward to an extreme position in accordance with an embodiment of the present invention;
In the figure: 1. a first pipe fitting; 11. a driving rod; 12. a first stop lever; 13. a gear; 14. a driving unit; 15. a second stop lever; 16. a seal ring; 17. a strain gage; 18. a first swivel; 2. a second pipe fitting; 21. a fillet; 22. a bullnose; 23. a second swivel; 24. a driven rod; 25. a second limit rod; 26. a free portion; 27. a rack portion; 28. a first stop lever; 29. and a sliding frame.
The mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Detailed Description
In order to solve the problem that the connecting structure is damaged due to the fact that the temperature of the submarine cable protective tube rises after cold shrinkage is pulled into a straight line, the invention provides the submarine cable protective tube connecting device, an initial angle is formed between two adjacent cable protective tubes through the connecting device, and damage to the protective tubes or the connecting structure is avoided.
As shown in fig. 1 to 6, in one embodiment of the present invention, there is provided a submarine cable protection tube connection device, including: a first tube 1 and a second tube 2; the end part of the first pipe fitting 1 is provided with a first spherical pipe piece, the end part of the second pipe fitting 2 is provided with a second spherical pipe piece, the second spherical pipe piece is sleeved in the first spherical pipe piece to form spherical hinge connection, and the inner wall of the first spherical pipe piece far away from the second spherical pipe piece is provided with a strain gauge 17; the outer wall of the first pipe fitting 1 is provided with a driving rod 11, the end part of the driving rod 11 is provided with a gear 13, the outer wall of the second pipe fitting 2 is provided with a driven rod 24, and the driven rod 24 is provided with a rack part 27 meshed with the gear 13; when the pressure of the strain gauge 17 exceeds a predetermined value, the gear 13 rotates, changing the first tube member 1 and the second tube member 2 from the collinear state to the bent state.
When the cable protection tube is used, the first tube piece and the second tube piece are respectively and hermetically connected to two adjacent cable protection tubes to realize the connection of the cable protection tubes. The first spherical segment inner wall of the first pipe fitting 1 is matched with the second spherical segment outer wall of the second pipe fitting 2 to form spherical hinge connection, as shown in fig. 1 and 2. The strain gauge 17 is arranged on the left inner wall of the first spherical duct piece, the right inner wall of the first spherical duct piece is provided with a sealing groove, and a sealing ring 16 is arranged in the sealing groove to realize the sealing of spherical hinge connection. It can be understood that two seals can be arranged as required, so that the sealing requirement is ensured, and seawater is prevented from entering the cable protection tube.
The strain gage 17 undergoes a slight mechanical change under the action of an external force, and the resistance of the wire changes proportionally with the stretching condition based on a physical effect, i.e., stretching or compressing. The spherical strain gauge 17 is arranged on the inner wall of the first spherical segment far away from the second spherical segment and is used for measuring the extrusion degree of the outer wall of the first spherical segment on the inner wall of the second spherical segment.
As shown in fig. 3, the driving rod 11 is provided with a driving unit 14 (for example, a motor) for driving the gear 13 to rotate, and a control unit (not shown in the figure) for sending a signal to the control unit when the pressure value collected by the strain gauge 17 is greater than a predetermined value, and the control unit controls the driving unit 14 to rotate.
The connection means are arranged between specific adjacent cable guards of the flat sea floor. Because a certain angle is naturally formed between adjacent protection pipes when the cable protection pipes are laid on the non-flat sea floor, the connection device is not required for interference adjustment.
When the temperature of a plurality of cable protection pipes pulled into a straight line rises, the cable protection pipes expand, at this time, because no initial angle exists between adjacent protection pipes, the second spherical pipe piece can form extrusion on the left side (namely the position of the strain gauge 17) of the first spherical pipe piece, when the extrusion exceeds a preset value, the extrusion degree between the first spherical pipe piece and the second spherical pipe piece is lighter, the driving rod 11 and the driven rod 24 are enabled to relatively move through the rotation of the gear 13, and then two adjacent pipe pieces are driven to form an initial angle, and then under the action of thermal expansion, the angle between the adjacent pipe pieces is gradually increased so as to compensate the thermal expansion elongation, and the damage of the protection pipes or the connecting structure is avoided.
As shown in fig. 3 and fig. 4, the driving rod 11 is in an arc structure, the driven rod 24 is also in an arc structure, the centers of circles of the driving rod 11 and the driven rod 24 are coincident with the rotation center of the spherical hinge, and when the gear 13 drives the driven rod 24 to rotate relative to the driving rod 11, the first pipe fitting 1 and the second pipe fitting 2 form an initial angle. The driven rod 24 is disposed on a side of the driving rod 11 away from the first spherical segment, i.e., the driving rod 11 is located on the inner side, and the driven rod 24 is located on the outer side. It will be understood, of course, that the driving lever 11 may be disposed outside the driven lever 24, with the gear 13 engaging the rack portion 27 outside the driven lever 24.
As shown in fig. 3, the rack portion 27 is located at a side of the driven rod 24 facing the second spherical segment, two sides of the rack portion 27 are provided with free portions 26, and a distance from an inner side surface of the free portions 26 to the second spherical segment is greater than a distance from an inner side surface of the rack portion 27 to the second spherical segment.
Since the object of the present invention is to form an initial angle for two adjacent tubes only at the beginning of extrusion, the initial angle need not be too large, as long as the two adjacent tubes can be brought out of alignment. Therefore, the concave portions of the free portions 26 are provided on both sides of the rack portion 27, and the engagement of the driving lever 11 and the driven lever 24 is released when the two segments are out of alignment. Through the arrangement of the middle rack part 27 and the two side free parts 26, two adjacent duct pieces can be separated from a collinear state, and the free adjustment of the subsequent spherical hinge is not hindered. Specifically, the angles formed by the end surfaces at the two sides of the rack part 27 are 6 ° to 10 °, and the angle can be adjusted to the left by 3 ° to 5 °, or to the right by 3 ° to 5 °.
As shown in fig. 3, the driving lever 11 is provided with a first blocking lever 12 and a second blocking lever 15, the first blocking lever 12 and the second blocking lever 15 are located at the left side and the right side of the gear 13, and the first blocking lever 12 and the second blocking lever 15 are both cylinders. As shown in fig. 4, the driven rod 24 is provided with a first stop lever 28 and a second stop lever 25, the first stop lever 28 and the second stop lever 25 are respectively located at the left side and the right side of the two free portions 26, the right side of the first stop lever 28 is an arc surface for being abutted against the first stop lever 12, the left side of the second stop lever 25 is an arc surface for being abutted against the second stop lever 15, as shown in fig. 5 and 6, the rotation angles of the first spherical segment and the second spherical segment are limited by the cooperation of the two baffles and the two stop levers, and the spherical segment end is propped against the opposite side pipe fitting when the rotation angle of the spherical segment is prevented from being too large, so that the submarine cable protection tube is more reliable to use.
As shown in fig. 3 and 4, the outer wall of the first pipe fitting 1 is rotatably connected with a first swivel 18, and the end part of the driving rod 11 is fixedly connected with the first swivel 18; the outer wall of the second pipe fitting 2 is rotatably connected with a second swivel 23, and the end part of the driven rod 24 is fixedly connected with the second swivel 23. Through the setting of first swivel 18 and second swivel 23, the angle of convenient regulation driving rod 11 and driven lever 24 relative first pipe fitting 1 and second pipe fitting 2, the protection tube of conveniently laying also prevents the problem that driving rod 11 and driven lever 24 were blocked.
Further, a sliding frame 29 is disposed at one end of the driven rod 24 away from the second pipe fitting 2, the sliding frame 29 has a hollow slot, the driving rod 11 is inserted into the hollow slot of the sliding frame 29, and the driven rod 24 is guaranteed to slide relatively to the driving rod 11 by sleeving the sliding frame 29 on the outer side of the driving rod 11, so that the problem that the gear 13 and the rack portion 27 are separated is avoided.
As shown in fig. 4, the outer side of the second segment end is provided with a bullnose 22, and the inner side of the second segment end is provided with a fillet 21. By providing the bullnose 22, the second segment is prevented from scoring the strain gage 17 as the two segments are rotated relative to one another. By arranging the fillets 21, the second spherical duct piece is prevented from scratching the cable in the protection pipe, so that the submarine cable protection pipe is safer and more reliable to use.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (5)
1. A submarine cable protection tube connection device, comprising: a first pipe and a second pipe;
the first pipe fitting end is provided with a first spherical pipe piece, the second pipe fitting end is provided with a second spherical pipe piece, the second spherical pipe piece is sleeved in the first spherical pipe piece to form spherical hinge connection, and the inner wall of the first spherical pipe piece far away from the second spherical pipe piece is provided with a strain gauge;
The outer wall of the first pipe fitting is provided with a driving rod, the end part of the driving rod is provided with a gear, the outer wall of the second pipe fitting is provided with a driven rod, and the driven rod is provided with a rack part meshed with the gear;
When the pressure of the strain gauge exceeds a preset value, the gear rotates to change the first pipe fitting and the second pipe fitting from a collinear state to a bending state;
The rack part is positioned at one side of the driven rod, which faces the second spherical duct piece, free parts are arranged at two sides of the rack part, and the distance from the inner side surface of the free part to the second spherical duct piece is larger than that from the inner side surface of the rack part to the second spherical duct piece;
The angle formed by the end surfaces at the two sides of the rack part is 6-10 degrees;
The driving rod is provided with a first stop lever and a second stop lever, and the first stop lever and the second stop lever are positioned on two sides of the gear; the driven rod is provided with a first limiting rod and a second limiting rod, and the first limiting rod and the second limiting rod are respectively positioned at two sides of the free part;
The outer wall of the first pipe fitting is rotationally connected with a first swivel, and the end part of the driving rod is fixedly connected with the first swivel; the outer wall of the second pipe fitting is rotationally connected with a second swivel, and the end part of the driven rod is fixedly connected with the second swivel;
The driven rod is provided with a sliding frame at one end far away from the second pipe fitting, the sliding frame is provided with a hollow slot hole, and the driving rod is inserted into the hollow slot hole of the sliding frame.
2. The submarine cable protection tube connecting device according to claim 1, wherein the driving rod is of an arc-shaped structure, the driven rod is of an arc-shaped structure, the circle centers of the driving rod and the driven rod are coincident with the rotation center of the spherical hinge, and the driven rod is arranged on one side, far away from the first spherical segment, of the driving rod.
3. The submarine cable protection tube connecting device according to claim 1, wherein a sealing groove is arranged in the first spherical segment, the sealing groove is arranged on the inner wall of one side of the first spherical segment, which is close to the second spherical segment, and a sealing ring is arranged in the sealing groove.
4. The submarine cable protection tube connection device according to claim 1, wherein the outer side of the second spherical segment end is provided with a bullnose and the inner side of the second spherical segment end is provided with a fillet.
5. Submarine cable sheath connection according to claim 1, wherein the connection is arranged between two cable sheaths on a flat seabed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410523811.3A CN118117516B (en) | 2024-04-29 | 2024-04-29 | Submarine cable protection tube connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410523811.3A CN118117516B (en) | 2024-04-29 | 2024-04-29 | Submarine cable protection tube connecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118117516A CN118117516A (en) | 2024-05-31 |
| CN118117516B true CN118117516B (en) | 2024-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410523811.3A Active CN118117516B (en) | 2024-04-29 | 2024-04-29 | Submarine cable protection tube connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118117516B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100009288U (en) * | 2009-03-13 | 2010-09-27 | 이의근 | protective cover for submarine cable |
| CN216598850U (en) * | 2021-10-29 | 2022-05-24 | 扬州特莱斯管业科技有限公司 | Antistatic connecting device for protection tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG11202101716VA (en) * | 2018-08-21 | 2021-03-30 | Pmi Industries Inc | Wind hang off |
-
2024
- 2024-04-29 CN CN202410523811.3A patent/CN118117516B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100009288U (en) * | 2009-03-13 | 2010-09-27 | 이의근 | protective cover for submarine cable |
| CN216598850U (en) * | 2021-10-29 | 2022-05-24 | 扬州特莱斯管业科技有限公司 | Antistatic connecting device for protection tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118117516A (en) | 2024-05-31 |
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