CN210957757U - Welding type cross-linked cable recovery straight joint - Google Patents
Welding type cross-linked cable recovery straight joint Download PDFInfo
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- CN210957757U CN210957757U CN201922362211.0U CN201922362211U CN210957757U CN 210957757 U CN210957757 U CN 210957757U CN 201922362211 U CN201922362211 U CN 201922362211U CN 210957757 U CN210957757 U CN 210957757U
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- 238000005493 welding type Methods 0.000 title description 6
- 238000011084 recovery Methods 0.000 title description 5
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 238000003466 welding Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000498 cooling water Substances 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- 230000004927 fusion Effects 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract 8
- 239000007770 graphite material Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 9
- 238000004804 winding Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000005498 polishing Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
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- 238000011900 installation process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model relates to a butt fusion formula resumes crosslinked cable straight-through joint, have pin-connected panel die body and die cover, die body upper portion is equipped with powder reaction chamber, and the reaction chamber below is equipped with the welding molding chamber, communicates through the guiding gutter between powder reaction chamber and the welding molding chamber, and the both ends symmetry of welding molding chamber are equipped with wire core slot, be equipped with the cushion chamber on the guiding gutter, this cushion chamber with the welding molding chamber next-door neighbour communicates; the outer parts of two sides of the die body are respectively provided with a cooling copper block, the cooling copper block is formed by combining an upper cooling block and a lower cooling block, a wire core through hole is formed at the splicing position of the upper cooling block and the lower cooling block, the upper cooling block and the lower cooling block are respectively provided with a cooling water channel, one end ports of the two cooling water channels are connected in series through a water pipe, and the other end ports of the two cooling water channels are respectively a water inlet of a water pump and a water outlet of the cooling water; the improved die greatly reduces the dosage of the powder of exothermic reaction, and has good welding forming quality and high processing efficiency.
Description
Technical Field
The utility model belongs to the technical field of the power cable mold processing technique and specifically relates to a butt fusion formula resumes straight joint of crosslinked cable.
Background
At present, the connection extension of the crosslinked polyethylene insulated power cable is generally realized by connecting the metal wire cores of two power cables in a crimping or screw fastening manner of an intermediate connecting pipe. However, the intermediate connecting pipe is structurally connected in a compression joint or screw fastening mode, is not firm, is easy to break, has special shape and deformation, cannot form a concentric circle, discharges at the sharp corner of the connecting part, has large air gap, small physical and mechanical properties, large radial electric field loss and large heat productivity, seriously influences the current-carrying capacity of the power cable, and is complicated in connection construction; the installation method is suitable for the installation method of a cold-shrinkage type intermediate connection structure mode and a hot-shrinkage type intermediate connection structure mode, and an air gap exists inside the structure, so that partial discharge is generated, the expansion and the deterioration are propagated, and the insulation breakdown is caused; moisture absorption or water inflow phenomenon, the breathing effect and the electrophoresis effect of moisture or humidity permeate into the middle joint, the interface resistance is rapidly reduced, and creeping discharge is generated; the insulation strength is reduced or aged, the cable is carbonized in a tree-shaped discharge manner, and accidents such as creepage breakdown are triggered, so a novel technology, namely a cable fusion type straight-through joint technology is often adopted at present, the technology has a plurality of advantages compared with a common cable middle joint manufacturing mode, and the cable is restored to a new cable state step by step through regeneration of a cable structure; the ratio of the breaking force of the copper core welding position to the body of the cable intermediate joint manufactured by the technology is 92.5%, the tensile strength of conductor welding reaches more than 85% of the strength of the body, and the line fault frequency caused by the cable intermediate joint can be greatly reduced.
The cable welding type straight-through joint technology can restore the cable to the original shape through multiple processes of core welding, core polishing, equal-diameter restoration of the melting of the inner semiconductor layer of the cable, melting restoration of the main insulating layer, polishing of the main insulating layer, equal-diameter restoration of the outer semiconductor layer, restoration of the outer sheath of the cable and the like. The technology has the greatest advantages that the melting technology is utilized to melt and connect the copper wire core, the inner shield, the main insulator and the outer shield into a whole, so that the waterproof and insulating properties of the cable are enhanced, and the service life of the intermediate joint of the cable is prolonged. According to the requirements of cable raw materials, main body structures and specifications, an extrusion die insulation cross-linking process is adopted to fuse and combine cable shielding, insulation and outer shielding to form a cable electric field shielding body which has consistent body characteristics, does not need stress treatment and has no air gap interface, the electric field distribution of a cable welding type straight-through joint is completely equal to the electric field distribution characteristics of a cable body, and the joint full recovery concept of no additional stress cone, stress tube structures and no interface air gap is adopted. At present, power supply departments adopt S300mm or S240mm pure copper cables in cable ditches, if the pure copper cables are not well treated, great potential safety hazards can be caused, the cable welding type straight-through joint technology recovers the cable body connecting technology, the conductivity, tensile strength and the like of the treated joints are greatly improved compared with those of the copper cables, but the straight-through joints processed by a mold which is subjected to fusion welding at present often need to be polished up and down to remove burrs, more medicinal powder is consumed during welding, and meanwhile, a large amount of heat is generated to damage cable insulation.
Disclosure of Invention
The utility model aims at providing a butt fusion formula resumes crosslinked cable through-connection to above-mentioned condition, this novel joint improves greatly reduced exothermic reaction's powder quantity, and the weld forming is of high quality, and machining efficiency is high.
The utility model has the following concrete scheme: a butt fusion type recovery crosslinked cable straight-through joint comprises an assembled die body and a die cover, wherein a powder reaction cavity is arranged at the upper part of the die body, a welding forming cavity is arranged below the reaction cavity, the powder reaction cavity is communicated with the welding forming cavity through a diversion trench, two ends of the welding forming cavity are symmetrically provided with wire core slots, the diversion trench is provided with a buffer cavity, and the buffer cavity is closely communicated with the welding forming cavity; and cooling copper blocks are respectively arranged outside the two sides of the die body, the cooling copper blocks are formed by combining an upper cooling block and a lower cooling block, wire core through holes are formed at the splicing positions of the upper cooling block and the lower cooling block, a cooling water channel is respectively arranged in the upper cooling block and the lower cooling block, one end ports of the two cooling water channels are connected in series through a water pipe, and the other end ports of the two cooling water channels are respectively a water inlet of a water pump and a water outlet of the cooling water.
Further, in the present invention, the diameter of the welding forming cavity is larger than the diameter of the wire core groove.
Furthermore, in the present invention, the mold body and the mold cover are made of graphite.
The novel joint welded cavity of the utility model is in a inverted T structure, and the arrangement of the buffer cavity greatly reduces the usage amount of the powder of the exothermic reaction, reduces the heat generated by heat release, reduces the time consumed by later polishing of the product and improves the working efficiency on the premise of not influencing welding; set up the cooling water passageway with the cooling copper billet, utilize the water pump to draw water the cooling and give the copper core cooling, reuse hair-dryer is cooled down simultaneously, reduces slight bubble, the gas pocket that the naked eye can't see, makes interior shielding structure be in the best effect.
Drawings
FIG. 1 is a schematic view of the main cross-section direction structure of the middle mold body of the present invention;
FIG. 2 is a schematic view of the structure of the middle mold cover of the present invention;
FIG. 3 is a schematic view of the overall usage state structure of the present invention;
fig. 4 is a schematic view of the flow direction of the cooling water path in the middle cooling copper block of the present invention.
In the figure: 1-powder reaction chamber, 2-die body, 3-guiding gutter, 4-buffer chamber, 5-welding die cavity, 6-wire core groove, 7-upper cooling block, 8-copper core wire, 9-lower cooling block and 10-cooling water channel.
Detailed Description
Referring to fig. 1-4, the utility model relates to a welding type recovery crosslinked cable straight-through joint, which comprises an assembled die body 2 and a die cover, wherein the upper part of the die body is provided with a powder reaction chamber 1, a welding forming chamber 5 is arranged below the reaction chamber, the powder reaction chamber is communicated with the welding forming chamber through a diversion trench 3, two ends of the welding forming chamber are symmetrically provided with wire core slots 6, the diversion trench is provided with a buffer chamber 4, and the buffer chamber is communicated with the close proximity of the welding forming chamber; and cooling copper blocks are respectively arranged outside the two sides of the die body, the cooling copper blocks are formed by combining an upper cooling block 7 and a lower cooling block 9, a wire core through hole is formed at the splicing position of the upper cooling block and the lower cooling block, a cooling water channel 10 is respectively arranged in the upper cooling block and the lower cooling block, one end ports of the two cooling water channels are connected in series through a water pipe, and the other end ports of the two cooling water channels are respectively a water inlet of a water pump and a water outlet of cooling water.
Further, the diameter of the welding forming cavity is larger than that of the wire core groove in the embodiment.
Further, in this embodiment, the mold body and the mold cover are made of graphite.
The novel joint welded cavity of the utility model is in a inverted T structure, and the arrangement of the buffer cavity greatly reduces the usage amount of the powder of the exothermic reaction, reduces the heat generated by heat release, reduces the time consumed by later polishing of the product and improves the working efficiency on the premise of not influencing welding; set up the cooling water passageway with the cooling copper billet, utilize the water pump to draw water the cooling and give the copper core cooling, reuse hair-dryer is cooled down simultaneously, reduces slight bubble, the gas pocket that the naked eye can't see, makes interior shielding structure be in the best effect.
The process flow of the 0kV fusion-type intermediate connection installation process comprises the following steps:
1. the outer sheath is stripped, the steel armor is retained, the inner sheath is retained, the rest is removed, the filler is removed, and the wire core is separated.
2. And aligning the wire cores according to the phase sequence, adopting exothermic welding to weld the wire cores, enabling the two sections of copper core wires to penetrate through the cooling copper block of the die and enter the wire core groove, and controlling the distance between the two wire cores to be 3-5 mm.
3. And (3) performing heat release welding by using a mould, simultaneously pumping water and cooling by using a water pump through a cooling water channel, and additionally performing air cooling, taking out a welding head after welding forming, and polishing welding nodules to enable the welding position of the wire core to be smooth.
4. Cleaning the wire core and the insulating layer, then lapping the inner semi-conductive winding semi-conductive cloth layer and the semi-conductive vulcanized belt layer to ensure that the semi-conductive vulcanized belt layer is firmly vulcanized, and waiting for cooling after heating and crosslinking, wherein the water cannot be used for cooling.
5. Winding insulating vulcanized polyethylene belt, heating the insulating vulcanized polyethylene belt by using equipment to make the insulating vulcanized polyethylene belt cross-linked, polishing the vulcanized insulating layer to make the insulating vulcanized polyethylene belt smooth and flawless, spraying a semi-conducting layer, then winding the semi-conducting belt 2 layers, recovering a copper shielding layer by using a copper woven mesh, winding the insulating self-adhesive bag 2 layers by using a J-20 self-adhesive bag to recover an inner sheath layer, fixing the woven ground wire on two sections of steel armors respectively by using a constant force spring, and overlapping the outer sheath layer at two ends of the steel armors respectively to form a waterproof adhesive tape 2 layer with the winding length.
6. And respectively overlapping the heat-shrinkable sheaths with the outer sheaths at two ends by 100mm, and overlapping the heat-shrinkable sheaths in the middle. Heating, baking and shrinking, winding an armor tape and winding a PVC adhesive tape.
The powder reaction chamber in this embodiment is added with a powder package welded package which can be purchased directly in the market, when welding, a common match is used to ignite a high-temperature match inserted in the package, the powder is ignited to emit heat, slag is formed, and a joint is welded and formed.
Claims (3)
1. The utility model provides a butt fusion formula resumes crosslinked cable straight-through joint has pin-connected panel die body and die cover, and die body upper portion is equipped with powder reaction chamber, and the reaction chamber below is equipped with the welding molding chamber, through the guiding gutter intercommunication between powder reaction chamber and the welding molding chamber, and the both ends symmetry in welding molding chamber is equipped with wire core groove, its characterized in that: the guide groove is provided with a buffer cavity, and the buffer cavity is closely communicated with the welding molding cavity; and cooling copper blocks are respectively arranged outside the two sides of the die body, the cooling copper blocks are formed by combining an upper cooling block and a lower cooling block, wire core through holes are formed at the splicing positions of the upper cooling block and the lower cooling block, a cooling water channel is respectively arranged in the upper cooling block and the lower cooling block, one end ports of the two cooling water channels are connected in series through a water pipe, and the other end ports of the two cooling water channels are respectively a water inlet of a water pump and a water outlet of the cooling water.
2. A fusion spliced restoration cross-linked cable through-connection as defined in claim 1, wherein: the diameter of the welding forming cavity is larger than that of the wire core groove.
3. A fusion spliced restoration cross-linked cable through-connection as defined in claim 1, wherein: the die body and the die cover are made of graphite materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922362211.0U CN210957757U (en) | 2019-12-25 | 2019-12-25 | Welding type cross-linked cable recovery straight joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922362211.0U CN210957757U (en) | 2019-12-25 | 2019-12-25 | Welding type cross-linked cable recovery straight joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210957757U true CN210957757U (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922362211.0U Active CN210957757U (en) | 2019-12-25 | 2019-12-25 | Welding type cross-linked cable recovery straight joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210957757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149469A (en) * | 2022-06-29 | 2022-10-04 | 宁波东方电缆股份有限公司 | Manufacturing process of ultrahigh-voltage direct-current 525kV wrapping fusion type soft joint |
-
2019
- 2019-12-25 CN CN201922362211.0U patent/CN210957757U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149469A (en) * | 2022-06-29 | 2022-10-04 | 宁波东方电缆股份有限公司 | Manufacturing process of ultrahigh-voltage direct-current 525kV wrapping fusion type soft joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A fusion type recovery cross-linked cable through joint Effective date of registration: 20231121 Granted publication date: 20200707 Pledgee: Bank of China Limited Huanggang branch Pledgor: HUANGSHI SHENBO ELECTRIC Co.,Ltd. Registration number: Y2023980066414 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |