CN114029357A - Stretching repair process for submarine cable metal pipe defects - Google Patents
Stretching repair process for submarine cable metal pipe defects Download PDFInfo
- Publication number
- CN114029357A CN114029357A CN202111304118.XA CN202111304118A CN114029357A CN 114029357 A CN114029357 A CN 114029357A CN 202111304118 A CN202111304118 A CN 202111304118A CN 114029357 A CN114029357 A CN 114029357A
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- pipe
- tube
- length
- drawn
- defects
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- 230000007547 defect Effects 0.000 title claims abstract description 60
- 239000002184 metal Substances 0.000 title claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 42
- 230000008439 repair process Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000003466 welding Methods 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a stretching repair process for defects of a submarine cable metal pipe, which comprises the following steps: arranging a first tube drawing device in front of a metal tube forming device, and drawing a formed tube to obtain a first drawn tube which does linear motion; after the defects are identified, the rolling and the drawing are stopped, the defects are prevented from passing through the first pipe drawing device, and the defect removal length L is determined on the first drawn pipe and the forming pipe according to the positions and the lengths of the defects1Go on L1Removing the length pipe body; determining the compensated drawing length L2Measuring L backwards from the end of the subsequent forming tube2Length, exerting a forward thrust on the second tube drawing device, is substituted for L1A second drawn tube of length tube body; and welding the first drawing pipe and the second drawing pipe. Through the mode, the submarine cable metal pipe defect stretching repair process has the advantages of wide repair application range, no limitation on defect types and sizes, and operationThe method is simple and convenient, and the structural strength and reliability after repair are ensured.
Description
Technical Field
The invention relates to the technical field of submarine cable production and repair, in particular to a submarine cable metal pipe defect stretching repair process.
Background
The conventional submarine cable usually comprises a metal layer, such as a steel pipe or a copper pipe, which can perform the functions of current conduction, signal interference resistance, electric field distribution improvement, structure fastening and the like, and the integrity of the metal layer has a significant influence on the subsequent processing and the overall performance of the submarine cable.
In the production process, the metal layer of the submarine cable is difficult to avoid defects, for the defects of a single metal pipe with a short length, the repaired metal pipe can not generate adverse effects on the performance of the submarine cable on the premise of ensuring the repair quality by adopting a conventional defect repairing mode (such as repair welding), and for the defects with large length and complexity, the conventional repairing mode cannot meet the performance requirements after repair or can not effectively repair the defects.
The traditional method for repairing the metal layer of the submarine cable is to repair the defect, so that the repairing method, materials and the like are limited by the type, size and other factors of the defect.
The traditional repair process has the following disadvantages:
the repair process is only suitable for the defects of the specified type, the defects outside the specified type range cannot be repaired, and the repair type is limited;
in order to ensure the repair quality and meet the product performance, the repair length cannot be overlong generally, and is limited;
different materials and process parameters are generally required to be corresponding to different defects for repairing, and even the materials and the process parameters are required to be determined through multiple tests, so that the uncertainty of results and the investment of manpower and material resources are increased.
Disclosure of Invention
The invention mainly solves the technical problem of providing a stretching repair process for defects of a submarine cable metal pipe, which realizes effective repair of various defects of the metal pipe, particularly the defects with large length, controls the repair cost and simultaneously does not influence the product quality.
In order to solve the technical problems, the invention adopts a technical scheme that: the process for stretching and repairing the defects of the submarine cable metal pipe comprises the following steps:
rolling and molding the metal belt through a metal pipe molding device to obtain a molding pipe;
arranging a first tube drawing device in front of a metal tube forming device, and drawing the formed tube under the action of traction force to obtain a first drawn tube which does linear motion;
a pipe defect detection device is arranged between the metal pipe forming device and the first pipe drawing device, and the surface of the formed pipe is detected and identified by the pipe defect detection device;
after the defects are identified, the rolling and the drawing are stopped, the defects are prevented from passing through the first pipe drawing device, and the defect removal length L is determined on the first drawn pipe and the forming pipe according to the positions and the lengths of the defects1Go on L1Removal of length pipe body and ensuring that the defect is located at the removed L1A length pipe body;
determining the compensated drawing length L2Measuring L backwards from the end of the subsequent forming tube2Length at which a second tube drawing device opposite to the first tube drawing device is clamped, a forward thrust being exerted on the second tube drawing device, such that L2The forming tube of the length is drawn towards the direction of the first drawing tube to obtain a substitute L1A second drawn tube of length tube body;
and welding the first drawing pipe and the second drawing pipe.
In a preferred embodiment of the present invention, the drawing length L is compensated2The calculation process of (2) is as follows:
L2=K* L1/(A-1)
in the formula: l is2-the draw length;
L1-defect removal length;
a, drawing elongation of the metal tube;
k is the correction coefficient.
In a preferred embodiment of the present invention, K is 0.9 to 1.
In a preferred embodiment of the present invention, the value of K is less than 1, and a drawing gap is left between the end surfaces of the first drawn pipe and the second drawn pipe, so as to facilitate girth welding of the first drawn pipe and the second drawn pipe.
In a preferred embodiment of the present invention, the inner cavities of the first tube drawing device are the same size and are reversed to ensure the uniformity of the outer diameters of the first drawn tube and the second drawn tube.
In a preferred embodiment of the invention, L1The front end of the length pipe body is positioned on the first drawing pipe.
In a preferred embodiment of the present invention, L is removed1Before the length body, the first pipe drawing device is moved forwards to make the cutting position of the front end of the L1 length body.
In a preferred embodiment of the present invention, the first drawn pipe and the second drawn pipe are welded and then the outer circle is polished.
The invention has the beneficial effects that: according to the stretching repair process for the defects of the metal pipe of the submarine cable, the defects after the metal pipe of the submarine cable is rolled are detected through the pipe defect detection device, the defects are found in time and early-warning is carried out, the raw materials are repaired through the idea of removing the defective module units and then stretching and connecting, the narrow range of repairing different defects is broken through, the defect body is bypassed, front and rear good products are welded to achieve the purpose of repairing, the repair application range is wide, the types and the sizes of the defects are not limited, the operation is simple and convenient, and the structural strength and the reliability after repairing are ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic structural diagram of a preferred embodiment of the process for repairing a defect in a submarine cable metal pipe according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention includes:
the process for repairing the defect of the submarine cable metal pipe shown in figure 1 by stretching comprises the following steps:
as shown in a part of fig. 1, a metal belt 1 is rolled and formed by a metal pipe forming device 2 to obtain a forming pipe 3, and the metal belt 1 can adopt a copper belt to improve the conductivity;
the first tube drawing device 6 is arranged in front of the metal tube forming device 2 at a traction force F1Under the action of the pressure sensor, the forming tube 3 is drawn to obtain a first drawing tube 7 which does linear motion;
a pipe defect detecting device 4 is arranged between the metal pipe forming device 2 and the first pipe drawing device 6, and the detection and the identification of the defect 5 are carried out on the surface of the forming pipe 3 which moves linearly through the pipe defect detecting device 4;
after the defects are identified, the rolling and the drawing are stopped, the defects 5 are prevented from passing through the first pipe drawing device 6, the defects of the forming pipe 3 can be detected, the parking position is controllable, and according to the positions and the lengths of the defects 5, as shown in a part b in figure 1, the defect removal length L is determined on the first drawing pipe 7 and the forming pipe 31Go on L1Removal of the length of pipe and ensuring that the defect 5 is located at the removed L1On the length of the tube, in this embodiment, L1The front end of the length pipe body is positioned at the first pullOn the tube 7, L1The tail end of the length tube body is positioned on the forming tube 3, L1The position of the front end of the length of pipe on the first drawn pipe 7 can be as short as possible, but also, therefore, when L is removed1Before the length of the pipe body, the first pipe drawing device 6 is moved forwards to make L out1The cutting position at the front end of the length pipe body is convenient for L1Cutting the length of pipe body, and then removing L1A length tube body;
determining the compensated drawing length L2Compensating the drawing length L2With support from theoretical calculations, in this example, the draw length L is compensated2The calculation process of (2) is as follows:
L2=K* L1/(A-1)
in the formula: l is2-the draw length;
L1-defect removal length;
a, drawing elongation of the metal tube;
k-correction coefficient, the value is 0.9-1.
Measuring L backwards from the port of the subsequent forming tube2Length, at which the second pipe-drawing device 8 is clamped, opposite to the first pipe-drawing device 6, and a forward thrust F is exerted on the second pipe-drawing device 82The second tube drawing device 8 is precisely translated so that L2The length of the forming tube is drawn in the direction of the first drawing tube 7 to obtain a substitute L1The inner cavity size (conical cavity) of the first tube drawing device 6 is the same and reverse, so as to ensure the uniformity of the outer diameters of the first drawing tube 7 and the second drawing tube, and then the second tube drawing device 8 is removed;
and (3) welding the first drawn pipe 7 and the second drawn pipe, as shown in part c in fig. 1, in the embodiment, the value of K is less than 1, the length of the second drawn pipe is controlled, and a drawing gap delta is reserved between the end surfaces of the first drawn pipe 7 and the second drawn pipe, so that girth welding of the first drawn pipe 7 and the second drawn pipe is facilitated, a pipe girth welding seam 9 is obtained, and the strength of the connecting structure is ensured.
And after the first drawing pipe 7 and the second drawing pipe are welded, polishing the excircle of the pipe circumferential weld 9, recovering the coiling of the metal pipe forming device 2 and the drawing of the first pipe drawing device 6, and continuing the gap detection and the modification work after the defect is found.
In conclusion, the submarine cable metal pipe defect stretching repair process disclosed by the invention is wide in repair application range, the type and the size of defects on a submarine cable metal pipe are not limited, the repaired body is used for repairing, additional auxiliary materials are not needed in the repair process, the strength and the reliability of connection are ensured, the defect repair effect is good, the surface quality is high, no bad residues exist, the operation process is simple, and the working efficiency is high.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A stretching repair process for defects of a submarine cable metal pipe is characterized by comprising the following steps:
rolling and molding the metal belt through a metal pipe molding device to obtain a molding pipe;
arranging a first tube drawing device in front of a metal tube forming device, and drawing the formed tube under the action of traction force to obtain a first drawn tube which does linear motion;
a pipe defect detection device is arranged between the metal pipe forming device and the first pipe drawing device, and the surface of the formed pipe is detected and identified by the pipe defect detection device;
after the defects are identified, the rolling and the drawing are stopped, the defects are prevented from passing through the first pipe drawing device, and the defect removal length L is determined on the first drawn pipe and the forming pipe according to the positions and the lengths of the defects1Go on L1Removal of length pipe body and ensuring that the defect is located at the removed L1A length pipe body;
determining the compensated drawing length L2Measuring L backwards from the end of the subsequent forming tube2Length at which a second tube drawing device opposite to the first tube drawing device is clampedApplying a forward thrust on the second tube drawing device, such that L2The forming tube of the length is drawn towards the direction of the first drawing tube to obtain a substitute L1A second drawn tube of length tube body;
and welding the first drawing pipe and the second drawing pipe.
2. The process of claim 1, wherein the compensation drawing length L is a drawing length L2The calculation process of (2) is as follows:
L2=K* L1/(A-1)
in the formula: l is2-the draw length;
L1-defect removal length;
a, drawing elongation of the metal tube;
k is the correction coefficient.
3. The submarine cable metal pipe defect stretch-repair process according to claim 2, wherein K is 0.9-1.
4. The submarine cable metal pipe defect stretch-repair process according to claim 3, wherein the value of K is less than 1, and a draw gap is left between the end faces of the first drawn pipe and the second drawn pipe, so as to facilitate girth welding of the first drawn pipe and the second drawn pipe.
5. The process of claim 1, wherein the inner cavities of the first tube drawing device are the same size and are reversed to ensure uniformity of the outer diameters of the first drawn tube and the second drawn tube.
6. The process of claim 1, wherein L is L1The front end of the length pipe body is positioned on the first drawing pipe.
7. Submarine cable metal pipe section according to claim 1The process for repairing sink by stretching is characterized in that L is removed1Before the length pipe body, the first pipe drawing device is moved forwards to give way to L1The cutting position of length body front end.
8. The process of claim 1, wherein the first drawn pipe and the second drawn pipe are welded together and the outer circle of the first drawn pipe and the second drawn pipe are polished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111304118.XA CN114029357B (en) | 2021-11-05 | 2021-11-05 | Stretching repair process for submarine cable metal tube defects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111304118.XA CN114029357B (en) | 2021-11-05 | 2021-11-05 | Stretching repair process for submarine cable metal tube defects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114029357A true CN114029357A (en) | 2022-02-11 |
| CN114029357B CN114029357B (en) | 2023-12-12 |
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ID=80136271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111304118.XA Active CN114029357B (en) | 2021-11-05 | 2021-11-05 | Stretching repair process for submarine cable metal tube defects |
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| Country | Link |
|---|---|
| CN (1) | CN114029357B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB376864A (en) * | 1931-04-29 | 1932-07-21 | Alfred Smallwood | A new or improved process of making seamless metal pipes and tubes |
| US5811755A (en) * | 1996-01-11 | 1998-09-22 | Lockheed Martin Corp. | Weld repair method for aluminum lithium seam |
| CN1385258A (en) * | 2001-05-10 | 2002-12-18 | Sms米尔股份有限公司 | Drawing unit for drawbench and method for drawing workpiece using same |
| CN102527767A (en) * | 2011-11-22 | 2012-07-04 | 玛切嘉利（中国）有限责任公司 | Cold drawing welded tube manufacture process for high-accuracy hydraulic oil cylinder |
| CN102821887A (en) * | 2010-06-04 | 2012-12-12 | 住友金属工业株式会社 | Method for suppressing surface indentation flaw in element tube for seamless steel tube |
| CN107219597A (en) * | 2017-06-08 | 2017-09-29 | 江苏亨通海洋光网***有限公司 | One kind feed deep-sea cable |
| CN207096517U (en) * | 2017-06-08 | 2018-03-13 | 江苏亨通海洋光网***有限公司 | One kind feed deep-sea cable |
| KR20210035533A (en) * | 2019-09-24 | 2021-04-01 | (주)세창스틸 | Method for manufacturing seamless tube for hollow spring steel, seamless tube for spring steel produced by this and automobile suspension spring steel using same |
-
2021
- 2021-11-05 CN CN202111304118.XA patent/CN114029357B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB376864A (en) * | 1931-04-29 | 1932-07-21 | Alfred Smallwood | A new or improved process of making seamless metal pipes and tubes |
| US5811755A (en) * | 1996-01-11 | 1998-09-22 | Lockheed Martin Corp. | Weld repair method for aluminum lithium seam |
| CN1385258A (en) * | 2001-05-10 | 2002-12-18 | Sms米尔股份有限公司 | Drawing unit for drawbench and method for drawing workpiece using same |
| CN102821887A (en) * | 2010-06-04 | 2012-12-12 | 住友金属工业株式会社 | Method for suppressing surface indentation flaw in element tube for seamless steel tube |
| CN102527767A (en) * | 2011-11-22 | 2012-07-04 | 玛切嘉利（中国）有限责任公司 | Cold drawing welded tube manufacture process for high-accuracy hydraulic oil cylinder |
| CN107219597A (en) * | 2017-06-08 | 2017-09-29 | 江苏亨通海洋光网***有限公司 | One kind feed deep-sea cable |
| CN207096517U (en) * | 2017-06-08 | 2018-03-13 | 江苏亨通海洋光网***有限公司 | One kind feed deep-sea cable |
| KR20210035533A (en) * | 2019-09-24 | 2021-04-01 | (주)세창스틸 | Method for manufacturing seamless tube for hollow spring steel, seamless tube for spring steel produced by this and automobile suspension spring steel using same |
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| Publication number | Publication date |
|---|---|
| CN114029357B (en) | 2023-12-12 |
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Address after: Building 2, No.8, Tongda Road, Changshu Economic and Technological Development Zone, Suzhou City, Jiangsu Province, 215000 Patentee after: Jiangsu Hengtong Huahai Technology Co.,Ltd. Country or region after: China Address before: Building 2, No.8, Tongda Road, Changshu Economic and Technological Development Zone, Suzhou City, Jiangsu Province, 215000 Patentee before: JIANGSU HENGTONG MARINE CABLE SYSTEMS Co.,Ltd. Country or region before: China |