CN112490811B - Method for connecting railway through ground wire - Google Patents
Method for connecting railway through ground wire Download PDFInfo
- Publication number
- CN112490811B CN112490811B CN202011294755.9A CN202011294755A CN112490811B CN 112490811 B CN112490811 B CN 112490811B CN 202011294755 A CN202011294755 A CN 202011294755A CN 112490811 B CN112490811 B CN 112490811B
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- Prior art keywords
- welding
- cable core
- sleeve
- brass sleeve
- sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Processing Of Terminals (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
The invention discloses a method for connecting a railway through ground wire, which comprises the steps of sleeving a porcelain sleeve on a cable core with a removed sheath, and welding the cable core by using a butt welding machine; after welding, smashing the porcelain sleeve; polishing the welding joint part of the cable core; cutting a brass sleeve with a proper length, and sleeving the brass sleeve; clamping the brass sleeve by using bench clamp, and tightly sleeving the brass sleeve on the cable core; welding the straight joint of the brass sleeve and the joint of the circumferences of the two ends and the sheath; and polishing the welding scars of the welding parts of the brass sleeves. The invention has the beneficial effects that: the welding recovery is respectively carried out on the cable core and the sheath in different welding modes, and the method can ensure the use reliability of the continuous cable, keep good grounding conductivity and corrosion resistance, and digest short-section cables.
Description
Technical Field
The invention relates to the field of railway electrical equipment, in particular to a method for connecting a railway through ground wire by using welding equipment and a specific process method.
Background
The railway through ground wire is a main grounding component and a cable product of a high-speed railway comprehensive grounding system. Railway through ground wire main structure (as shown in figure 1): the cable core 1 is formed by twisting a plurality of pure copper conductors 2 together in a layer twisting mode or a concentric twisting mode, a layer of sheath 3 is arranged outside the cable core 1, and the sheath 3 is made of brass alloy.
After the railway through ground wire is buried underground, the brass alloy sheath 3 can ensure that the through ground wire has good conductive grounding performance, can prevent the soil environment from corroding the pure copper conductor 2, and plays a role in protection. The main characteristics of the production of the railway through ground wire are concentrated on the production of the sheath 3, and at present, the production mode of the sheath 3 is as follows: the cable core 1 is inserted into a long seamless brass tube, and the brass tube is subjected to drawing reducing or rolling reducing so as to be coated on the cable core 1 to form the sheath 3.
In the initial factory production process, short cables with insufficient delivery length are generated for various inevitable reasons, and the overstocked short cables directly increase the production cost of a manufacturing enterprise and cause waste over time. Therefore, a splicing method is needed to connect two short cables. Because the cable core 1 is made of pure copper, the melting point is 1083.4 ℃, the sheath 3 is made of brass, and the melting point is 934 ℃. The two materials have different melting points, and the two materials cannot be welded simultaneously by adopting a single welding mode.
Disclosure of Invention
The invention aims to connect railway through ground wires with different lengths to form a product with a large length, and provides a method for connecting the railway through ground wires.
The technical scheme of the invention is as follows: a method for connecting a railway through ground wire comprises the following steps: preparation work
1) Removing 20mm of sheaths of end parts of two through ground wires to be connected;
2) preparing a ceramic sleeve for welding and connecting a pure copper conductor;
3) preparing a brass sleeve with an opening on the pipe wall, wherein the opening size is larger than the diameter of the cable core, and the maximum expanded width of the brass sleeve is smaller than the outer diameter of the sheath;
4) preparing a magnetic tube butt welder electrode clamping mold;
5) preparing the hand-held argon arc welding machine.
Step two: welding connection of cable core
1) Sleeving a porcelain sleeve on the cable core with the sheath removed, clamping the cable core of the continuous part between two electrodes of a butt welding machine, adjusting the position of the porcelain sleeve, and welding the cable core;
2) after welding, smashing the porcelain sleeve, observing the butt welding effect of the cable core, if the welding effect is not good, sawing off the cable core, repeating the steps, and re-welding until the welding is firm;
3) if the welding effect is good, the welding joint part of the cable core is polished, so that the outer diameter of the welding joint part is basically consistent with that of the cable core.
Step three: welded connection of sheathing
1) After the second step, measuring the exposed length of the cable core by using a caliper, determining the length of the brass sleeve according to the length, and cutting out the brass sleeve with a proper length;
2) aligning the opening part of the brass sleeve to the welded cable core, and sleeving the brass sleeve;
3) clamping the brass sleeve by using bench clamp, and tightly sleeving the brass sleeve on the cable core to reduce the opening part of the brass sleeve to form a gap enough for welding;
4) welding the straight joint of the brass sleeve and the joint of the circumferences of the two ends and the sheath by using a handheld argon arc welding machine;
5) and polishing the craters of the welding part of the brass sleeve to ensure that the appearance of the welding part is smooth, and the outer diameter of the welding part is basically consistent with the outer diameter of the ground wire sheath with two ends penetrating through.
The invention has the beneficial effects that: the method can weld the cable cores of two railway through ground wires and then weld the sheath. The welding recovery is respectively carried out on the cable core and the sheath in different welding modes, and the whole tensile strength of the welded cable core reaches the whole tensile strength of the original cable core through butt welding of a butt welding machine and the welding protection of the porcelain sleeve. The brass sleeve is used, so that the consistency of the material and the sheath is ensured, and the outer diameter and the appearance of the original sheath are maintained by the brass sleeve after welding, grinding and polishing. The method can ensure the use reliability of the continuous cable, keep good grounding conductivity and corrosion resistance, digest short-section cables and effectively save the manufacturing cost of the cables.
Drawings
FIG. 1 is a cross-sectional view through a ground wire;
FIG. 2 is a schematic view of a weld material preparation;
FIG. 3 is a schematic diagram of welding connection of the cable core 1;
FIG. 4 is a schematic view of the welding connection of the sheath 3;
in the drawings: 1. the cable comprises a cable core, 2 copper conductors, 3 sheaths, 4 ceramic sleeves, 5 brass sleeves, 6 butt welding machine electrodes and 7 argon arc welding machine handles.
Detailed Description
A method for connecting a railway through ground wire comprises the following steps: preparatory work (as shown in figure 2)
1) Removing the sheath 3 of the end parts of the two through ground wires to be connected by about 20 mm;
2) preparing a ceramic sleeve 4 (a magnetic tube butt welder) for welding the continuous pure copper conductor 2;
3) preparing an opening brass sleeve 5, wherein the size of the opening is slightly larger than the diameter of the cable core 1, the maximum width of the brass sleeve 5 when the brass sleeve is unfolded is slightly smaller than the outer diameter of the sheath, and enough welding allowance is reserved;
4) preparing a magnetic tube butt welding machine electrode clamping mould 6;
5) a hand-held argon arc welder 7 is prepared.
Step two: welding connection of cable core (as shown in figure 3)
1) Sleeving the porcelain sleeve 4 on the cable core 1 with the sheath 3 removed, clamping the continuous part of the cable core 1 between two electrodes 7 of a butt welding machine 6, adjusting the position of the porcelain sleeve 4, and performing cable core welding;
2) after welding, the porcelain sleeve 4 is broken, and the butt welding effect of the cable core 1 is observed. If the welding effect is not good, the cable core 1 can be sawn off, the steps are repeated, and welding is carried out again until the welding is firm;
3) if the welding effect is good, the welding joint part of the cable core 1 can be polished, so that the outer diameter of the welding joint part is basically consistent with that of the cable core 1.
Step three: welded connection of sheath 3 (as shown in figure 4)
1) Measuring the exposed length of the cable core 1 after the second step by using a caliper, determining the length of the brass sleeve 5 according to the length, and cutting out the brass sleeve 5 with a proper length;
2) aligning the opening part of the brass sleeve 5 with the welded cable core 1, and sleeving the brass sleeve 5;
3) clamping the brass sleeve 5 part by using bench clamp to form a narrow gap capable of being welded at the opening part, and tightly sleeving the cable core 1;
4) welding the straight joint of the brass sleeve 5 and the joint of the circumferences of the two ends and the sheath 3 by using a handheld argon arc welding machine;
5) and polishing the welding scars of the welding part of the brass sleeve 5 to ensure that the appearance of the welding part is smooth, and the outer diameter of the welding part is basically consistent with the outer diameter of the ground wire sheath 3 with two ends penetrating through.
The invention respectively carries out welding recovery on the cable core 1 and the sheath 3 by using different welding modes, so that the railway through ground wires with different lengths are connected, and the railway through ground wires become products with large lengths. And the whole tensile strength of the welded cable core 1 reaches the whole tensile strength of the original cable core 1 through butt welding of a butt welding machine and welding protection of the porcelain sleeve 4. Meanwhile, the brass sleeve 5 is consistent with the sheath 3 in material quality, and the brass sleeve 5 after welding, grinding and polishing keeps the outer diameter and the appearance of the original sheath 3.
Claims (1)
1. A method for connecting a railway through ground wire is characterized by comprising the following steps: preparation work
1) Removing 20mm of a sheath (3) of the end parts of two through ground wires to be connected;
2) preparing a porcelain bushing (4) for welding and connecting the pure copper conductor (2);
3) preparing a brass sleeve (5) with an opening on the pipe wall, wherein the opening is larger than the diameter of the cable core (1), and the maximum unfolded width of the brass sleeve (5) is smaller than the outer diameter of the sheath (3);
4) preparing a magnetic tube butt welder electrode clamping mould (6);
5) preparing a hand-held argon arc welding machine (7);
step two: welding connection of cable core
1) Sleeving a porcelain sleeve (4) on the cable core (1) with the sheath (3) removed, clamping the continuous cable core (1) between two electrodes of a butt welding machine, adjusting the position of the porcelain sleeve (4), and welding the cable core;
2) after welding, smashing the porcelain sleeve (4), observing the butt welding effect of the cable core (1), if the welding effect is not good, sawing off the cable core (1), repeating the steps, and re-welding until the welding is firm;
3) if the welding effect is good, polishing the welding joint part of the cable core (1) to ensure that the outer diameter of the welding joint part is basically consistent with that of the cable core (1);
step three: welded connection of sheathing
1) After the second step of connection, measuring the exposed length of the cable core (1) by using a caliper, determining the length of the brass sleeve (5) according to the length, and cutting out the brass sleeve (5) with a proper length;
2) aligning the opening part of the brass sleeve (5) to the welded cable core (1), and sleeving the brass sleeve (5);
3) clamping the brass sleeve (5) by using bench clamp, and tightly sleeving the brass sleeve on the cable core (1) to reduce the opening part of the brass sleeve to form a gap enough for welding;
4) welding the straight joint of the brass sleeve (5) and the joint of the circumferences of the two ends and the sheath (3) by using a handheld argon arc welding machine;
5) and polishing the welding scars of the welding part of the brass sleeve (5) to ensure that the appearance of the welding part is smooth, and the outer diameter of the welding part is basically consistent with the outer diameter of the ground wire sheath (3) with two ends penetrating through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294755.9A CN112490811B (en) | 2020-11-18 | 2020-11-18 | Method for connecting railway through ground wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294755.9A CN112490811B (en) | 2020-11-18 | 2020-11-18 | Method for connecting railway through ground wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112490811A CN112490811A (en) | 2021-03-12 |
| CN112490811B true CN112490811B (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011294755.9A Active CN112490811B (en) | 2020-11-18 | 2020-11-18 | Method for connecting railway through ground wire |
Country Status (1)
| Country | Link |
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| CN (1) | CN112490811B (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DK139859B (en) * | 1976-07-09 | 1979-04-30 | Nordiske Kabel Traad | Method for restoring the inner semiconductor layer by assembling cables, in particular high voltage cables and tool for use in the method. |
| CN201018252Y (en) * | 2006-11-11 | 2008-02-06 | 牟建 | Cold-shrinking connection sleeve for communication cable |
| CN100555784C (en) * | 2007-05-22 | 2009-10-28 | 宁波东方电缆股份有限公司 | A kind of preparation method of twisted polyethylene cable connecting hose |
| CN101453109A (en) * | 2007-12-07 | 2009-06-10 | 青岛汉缆股份有限公司 | High voltage and ultra high voltage crosslinking subsea cable soft joint and method for manufacturing the same |
| CN102055163A (en) * | 2009-11-06 | 2011-05-11 | 哈尔滨第二电业局 | 10KV power cable butting method |
| CN201773952U (en) * | 2010-03-12 | 2011-03-23 | 博侃电气(上海)有限公司 | Intermediate connector of single core cable |
| CN101854017B (en) * | 2010-05-10 | 2013-07-24 | 宁玉达 | Secondary wiring method in power engineering |
| CN104662738B (en) * | 2012-08-09 | 2017-03-01 | 线缆***集团总公司 | The mechanically and electrically method of interfacing electrical conductors |
| CN102904140B (en) * | 2012-09-28 | 2015-05-06 | 北京星航机电装备有限公司 | Cable shielding layer splicing method |
| CN203356885U (en) * | 2013-08-01 | 2013-12-25 | 湖北汽车工业学院 | Welding core shielding case for spot welding machine |
| CN204117710U (en) * | 2014-10-11 | 2015-01-21 | 天水铁路电缆有限责任公司 | A kind of mould of Through ground wire alloyed copper oversheath |
| CN105140755A (en) * | 2015-08-27 | 2015-12-09 | 江苏通鼎光电科技有限公司 | Great length railway through earth line copper strip continuous process |
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| CN112490811A (en) | 2021-03-12 |
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