CN107342558A - A kind of connection method of mineral insulated cable - Google Patents
A kind of connection method of mineral insulated cable Download PDFInfo
- Publication number
- CN107342558A CN107342558A CN201710528916.8A CN201710528916A CN107342558A CN 107342558 A CN107342558 A CN 107342558A CN 201710528916 A CN201710528916 A CN 201710528916A CN 107342558 A CN107342558 A CN 107342558A
- Authority
- CN
- China
- Prior art keywords
- mineral insulated
- insulated cable
- welding
- mica tape
- connection method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
Abstract
The invention discloses a kind of connection method of mineral insulated cable, the exposed conductor of two mineral insulated cables is welded together using soldering processes, then exposed conductor is wrapped up with mica tape and insulated, and finally the cable of welding section is connected and sealed using the solder connector of tubulose.The present invention is wrapped in outside conductor with high-temperature calcination type mica tape, forms insulating barrier, ensure that the insulating properties of mineral insulated cable after connection, and bonding strength is big, the sealing property and unfailing performance of connecting portion are good, are easy to cable in-site installation to construct, and connected mode is time saving and energy saving, cost is low.
Description
Technical field
The present invention relates to the construction method field of cable connection, specifically a kind of connection method of mineral insulated cable.
Background technology
Mineral insulated cable be it is a kind of by the use of inorganic oxide as insulating barrier, the fine copper high by the use of conductance as conductor and
The cable of sheath is used as by the use of seamless copper pipe.It can be in hundreds of normal and continuous operations even at a temperature of thousands of degrees Celsius, can
Significantly ensure the safety of the public and building.The mineral insulated cable of this copper core copper sheath is not only prevented with excellent
Fiery performance, and there is corrosion-resistant, not aging, waterproof anti-explosion, the characteristic of smokeless nontoxic and anti-electromagnetic interference, it disclosure satisfy that the country
The world is to the increasingly strict safety requirements of architectural design.
But at this stage due to the limitation of the factors such as production technology, equipment and initial raw materials, this mineral insulated cable
Production length be limited, requiring the different of supply of material length for client can not be met.At present in the industry generally using in mechanical
Between connector mode by two cable buttings together, with the length requirement of full scale difference engineering.This intermediate connector
Mode concrete operations are that special connector links together the connection end for two mineral insulated cables for needing to dock, this technology
For technique because being that site operation technical matters difficulty first is big, field condition also limit the reliability of Joining Technology implementation.Its
It is secondary because this external connector is connected using mechanical means, the seal of linkage section cannot be guaranteed that moisture-proof dosing technology technique will
Ask, hidden danger of quality all the time be present.Again because cable can not carry out whole correlated performance detections after field fabrication, can only carry out often
The Insulation monitoring of rule, it is impossible to ensure the insulating properties inside mineral insulated cable.
Each conductor is completely exposed after also allowing for welding in the prior art, need to carry out insulating protection.But in existing skill
Taken time and effort with the mode of tank magnesia powder or silicon dioxide powder in art, and sealed using fire-proof mud, and because mud glues
Property it is too big, cause operation inconvenience, and the moisture content carried in fire-proof mud, into the insulating barrier of incision in can influence the exhausted of cable
Edge performance.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of connection method of mineral insulated cable, using high-temperature calcination type
Mica tape is wrapped in outside conductor, forms insulating barrier, ensure that the insulating properties of mineral insulated cable after connection, and bonding strength is big,
The sealing property and unfailing performance of connecting portion are good, are easy to cable in-site installation to construct, and connected mode is time saving and energy saving, cost
It is low.
The technical scheme is that：
A kind of connection method of mineral insulated cable, has specifically included following steps：
（1）, first the oversheath of two mineral insulated cables an end portion to be docked is peeled off, then using the side of soldering
The exposed multiple conductors of two mineral insulated cables are corresponded to and welded by formula respectively；
（2）, it is using the mica tape of calcinated type that the exposed conductor after welding is fully wrapped around, and be enclosed with outside every conductor
Corresponding mica tape；
（3）, the mineral insulated cable after welding is passed through to the solder connector of tubulose, and the part for being enclosed with mica tape is put completely
In the endoporus of solder connector, finally by the oversheath of the both ends of solder connector and mineral insulated cable using soldering
Mode is welded respectively.
Described step（1）The weld seam of every conductor of mineral insulated cable staggers, and the gap of weld seam is identical, gap
Width is 0.4-0.6mm.
Described step（1）In soldering be gas brazing, selection of electrodes silver solder or copper arc welding electrode, after the completion of welding, adopt
The scaling powder of weld and oxide layer are polished totally with sand paper strip.
Mineral insulated cable after described welding is before mica tape is wrapped up, by two mineral insulated cable welding ends
Oversheath prescinds 10-15mm again, then exposed conductor is wrapped up using mica tape.
Described step（2）Before wrapping up mica tape, the cutting position of two mineral insulated cables, Ran Houyong are toasted with fire
Megameter measures the insulaion resistance of mineral insulated cable, determines to wrap up mica tape after insulaion resistance is qualified.
The mode of described mica tape parcel is that every conductor of the mineral insulated cable after welding is carried out respectively first
Parcel, then overall 2-3 layers of winding again, finally fixes mica tape in centre position.
Described step（3）The brazing mode of middle solder connector uses gas brazing or high-frequency induction brazing, use
Welding rod is silver solder, after the completion of welding, with abrasive paper for metallograph by the scaling powder and oxide layer of solder connector and cable welding position
Polishing is clean.
The endoporus of described solder connector is stepped hole, and the aperture at its both ends is identical, and the aperture in the middle part of it is more than two
The aperture of end.
Advantages of the present invention：
（1）, mineral insulated cable of the present invention conductor by the way of soldering, constructing operation is convenient, and improves bonding strength；
（2）, present invention mineral insulated cable after welding exposed conductor on wrap up high-temperature calcination type mica tape, form insulation
Layer, ensure that the insulating properties between mineral insulated cable conductor；
（3）, the present invention cable of welding section is connected and sealed using the solder connector of tubulose, ensure that connecting portion
Sealing property and unfailing performance；
（4）, present invention purpose that the oversheath of two mineral insulated cable welding ends is prescinded into 10-15mm again be because welding
During connecing, the magnesium oxide insulated layer of two mineral insulated cable welding end inner powder shape compactings leaks, in order to ensure end
The integrality of magnesium oxide insulated layer is, it is necessary to remove the magnesium oxide insulated layer of this section and carry out parcel insulation with mica tape；
（5）, the present invention before mica tape wrap up, with fire baking two mineral insulated cables cutting position, so as to eliminate
Moisture in oversheath internal oxidition magnesium insulating barrier, and with megameter measure mineral insulated cable insulaion resistance, and it is determined that absolutely
Mica tape is wrapped up again after edge resistance is qualified, so as to further increase the insulating properties between mineral insulated cable conductor；
（6）, solder connector of the present invention endoporus be stepped hole, be easy to mineral insulated cable to penetrate the endoporus of solder connector
In, stepped hole reduces the frictional force between mineral insulated cable and solder connector inwall.
Brief description of the drawings
Fig. 1 is the structural representation of the mineral insulated cable welded before present invention parcel mica tape.
Fig. 2 is the structural representation after the completion of mineral insulated cable connection of the present invention.
Fig. 3 is the sectional view of solder connector of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
See Fig. 1 and Fig. 2, a kind of connection method of mineral insulated cable, specifically include following steps：
（1）, first the oversheath 5 of two mineral insulated cables an end portion to be docked is peeled off, then using soldering
The exposed multiple conductors 3 of two mineral insulated cables are corresponded to and welded by mode respectively, every conductor of mineral insulated cable 3
Weld seam 33 staggers, and the gap of weld seam is identical, and the width in gap is 0.4-0.6mm；Soldering is gas brazing, selection of electrodes
Silver solder or copper arc welding electrode, after the completion of welding, the scaling powder of weld and oxide layer are polished totally using sand paper strip；
（2）, first the oversheath 5 of two mineral insulated cable welding ends is prescinded into 15mm again, it is ensured that magnesium oxide insulated layer 4 it is complete
Whole property, the cutting position of two mineral insulated cables is then toasted with fire, and the insulation of mineral insulated cable is measured with megameter
Resistance, determine that insulaion resistance is fully wrapped around by the exposed conductor 3 after welding using the mica tape 2 of calcinated type after qualified, i.e.,
Exposed every conductor 3 is wrapped up respectively first, then overall 2-3 layers of winding again, finally in the centre of exposed conductor 3
Position fixes mica tape；
（3）, the mineral insulated cable after welding is passed through to the solder connector 1 of tubulose, and the part for being enclosed with mica tape 2 is complete
It is placed in the endoporus of solder connector 1, finally uses the oversheath 5 of the both ends of solder connector 1 and mineral insulated cable
The mode of soldering is welded respectively, and brazing mode uses gas brazing or high-frequency induction brazing, and the welding rod used is silver
Welding rod, after the completion of welding, solder connector 1 and the scaling powder of cable welding position are polished with oxide layer with abrasive paper for metallograph and done
Only.
See Fig. 3, the wherein endoporus of solder connector 1 is stepped hole, and the aperture at its both ends 12 is identical, the hole at its middle part 11
Footpath is more than the aperture at both ends 12.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
- A kind of 1. connection method of mineral insulated cable, it is characterised in that：Following steps are specifically included：（1）, first the oversheath of two mineral insulated cables an end portion to be docked is peeled off, then using the side of soldering The exposed multiple conductors of two mineral insulated cables are corresponded to and welded by formula respectively；（2）, it is using the mica tape of calcinated type that the exposed conductor after welding is fully wrapped around, and be enclosed with outside every conductor Corresponding mica tape；（3）, the mineral insulated cable after welding is passed through to the solder connector of tubulose, and the part for being enclosed with mica tape is put completely In the endoporus of solder connector, finally by the oversheath of the both ends of solder connector and mineral insulated cable using soldering Mode is welded respectively.
- A kind of 2. connection method of mineral insulated cable according to claim 1, it is characterised in that：Described step（1） The weld seam of every conductor of mineral insulated cable staggers, and the gap of weld seam is identical, and the width in gap is 0.4-0.6mm.
- A kind of 3. connection method of mineral insulated cable according to claim 1, it is characterised in that：Described step（1） In soldering be gas brazing, selection of electrodes silver solder or copper arc welding electrode, after the completion of welding, weld is helped by weldering using sand paper strip Agent and oxide layer polishing are clean.
- A kind of 4. connection method of mineral insulated cable according to claim 1, it is characterised in that：After described welding Mineral insulated cable before mica tape is wrapped up, the oversheath of two mineral insulated cable welding ends is prescinded 10 again- 15mm, then exposed conductor is wrapped up using mica tape.
- A kind of 5. connection method of mineral insulated cable according to claim 4, it is characterised in that：Described step（2） Before wrapping up mica tape, the cutting position of two mineral insulated cables is toasted with fire, then measures mineral insulation electricity with megameter The insulaion resistance of cable, determine to wrap up mica tape after insulaion resistance is qualified.
- A kind of 6. connection method of mineral insulated cable according to claim 1, it is characterised in that：Described mica tape The mode of parcel is that every conductor of the mineral insulated cable after welding is wrapped up respectively first, then overall winding again 2-3 layers, finally mica tape is fixed in centre position.
- A kind of 7. connection method of mineral insulated cable according to claim 1, it is characterised in that：Described step（3） The brazing mode of middle solder connector uses gas brazing or high-frequency induction brazing, and the welding rod used for silver solder, complete by welding Afterwards, solder connector and the scaling powder of cable welding position are polished with oxide layer with abrasive paper for metallograph clean.
- A kind of 8. connection method of mineral insulated cable according to claim 1, it is characterised in that：Described welding connects The endoporus for connecing device is stepped hole, and the aperture at its both ends is identical, and the aperture in the middle part of it is more than the aperture at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528916.8A CN107342558A (en) | 2017-07-01 | 2017-07-01 | A kind of connection method of mineral insulated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528916.8A CN107342558A (en) | 2017-07-01 | 2017-07-01 | A kind of connection method of mineral insulated cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107342558A true CN107342558A (en) | 2017-11-10 |
Family
ID=60218331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710528916.8A Pending CN107342558A (en) | 2017-07-01 | 2017-07-01 | A kind of connection method of mineral insulated cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107342558A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899665A (en) * | 2018-06-05 | 2018-11-27 | 博侃电气（合肥）有限公司 | A kind of solder type connector of mineral insulated cable |
| CN114336438A (en) * | 2022-01-11 | 2022-04-12 | 四川新蓉电缆有限责任公司 | Method for repairing mineral insulated cable copper sheath |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0450806A (en) * | 1990-06-14 | 1992-02-19 | Nec Corp | Terminal processing method for welding/connecting high strength optical fiber |
| CN103000278A (en) * | 2012-12-17 | 2013-03-27 | 无锡江南电缆有限公司 | Flexible fireproof multiple-core cable |
| CN204696268U (en) * | 2015-07-01 | 2015-10-07 | 飞洲集团有限公司 | One connects cable soon |
| CN106025648A (en) * | 2016-04-29 | 2016-10-12 | 中航光电科技股份有限公司 | Mineral insulation cable wiring structure and wiring method thereof |
| CN106099602A (en) * | 2016-07-08 | 2016-11-09 | 上海安捷防火智能电缆有限公司 | A kind of welding procedure of mineral insulated cable |
| CN205846251U (en) * | 2016-07-09 | 2016-12-28 | 上海安捷防火智能电缆有限公司 | A kind of attachment structure for mineral insulated cable |
-
2017
- 2017-07-01 CN CN201710528916.8A patent/CN107342558A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0450806A (en) * | 1990-06-14 | 1992-02-19 | Nec Corp | Terminal processing method for welding/connecting high strength optical fiber |
| CN103000278A (en) * | 2012-12-17 | 2013-03-27 | 无锡江南电缆有限公司 | Flexible fireproof multiple-core cable |
| CN204696268U (en) * | 2015-07-01 | 2015-10-07 | 飞洲集团有限公司 | One connects cable soon |
| CN106025648A (en) * | 2016-04-29 | 2016-10-12 | 中航光电科技股份有限公司 | Mineral insulation cable wiring structure and wiring method thereof |
| CN106099602A (en) * | 2016-07-08 | 2016-11-09 | 上海安捷防火智能电缆有限公司 | A kind of welding procedure of mineral insulated cable |
| CN205846251U (en) * | 2016-07-09 | 2016-12-28 | 上海安捷防火智能电缆有限公司 | A kind of attachment structure for mineral insulated cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899665A (en) * | 2018-06-05 | 2018-11-27 | 博侃电气（合肥）有限公司 | A kind of solder type connector of mineral insulated cable |
| CN114336438A (en) * | 2022-01-11 | 2022-04-12 | 四川新蓉电缆有限责任公司 | Method for repairing mineral insulated cable copper sheath |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171110 |
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| RJ01 | Rejection of invention patent application after publication |