CN107633906B - A kind of insulating water-proof railway cable resistant to bending - Google Patents
A kind of insulating water-proof railway cable resistant to bending Download PDFInfo
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- CN107633906B CN107633906B CN201710906761.7A CN201710906761A CN107633906B CN 107633906 B CN107633906 B CN 107633906B CN 201710906761 A CN201710906761 A CN 201710906761A CN 107633906 B CN107633906 B CN 107633906B
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Abstract
The invention discloses a kind of insulating water-proof railway cables resistant to bending, including core and the conductor screen, insulating layer, insulation screen, water blocking layer and wrapped aluminium strip, the oversheath being set on water blocking layer that are set in turn in outside core, water blocking layer includes at least three-layer insulated glue-line, the conductive charcoal powder particles in porous spherical, 1/2 of diameter no more than distance between adjacent two layers insulation glue-line of charcoal powder particles are filled between adjacent two layers insulation glue-line；One or two insulation glue layer positioned at water blocking layer middle position offers anti-aging cavity, cavity cross section is integrally fan-shaped and fan shape center point is arranged away from core, insulating layer age resister is filled in cavity, iron powder is added in charcoal powder particles, electric field strength can be concentrated near charcoal powder particles rather than in the impurity for the glue-line that insulate, insulating layer can be reduced or the breakdown probability of glue-line that insulate, while absorb steam and oxygen, extend cable uses the time.
Description
Technical field
The present invention relates to field of cable technology, more specifically, it relates to a kind of insulating water-proof railway cable resistant to bending.
Background technique
Railway cable is applied to the power cable in railway line, and the performance of above-mentioned cable directly affects the operation of railway
Therefore safety has higher life performance requirement to railway cable.The environment rather harsh as locating for railway cable.Mesh
The biggest factor in the preceding service life for influencing railway cable is the anti-aging property and block-water performance of cable, above-mentioned two big factor
In, aging (the mainly aging of cable insulation) speed of cable is mostly related with the temperature of environment, radiation intensity, after aging
Cable surface cracks, and the steam in external environment enters inside cable, directly affects the use of cable.In addition, in railway electricity
In the use process of cable, cable is often in moist environment, and external moisture can be penetrated into slowly inside cable, in electricity
" water tree " is formed in insulating layer under the action of cable internal electric field power, with the expansion of above-mentioned " water tree ", cable insulation
Dielectric strength is weakened severely, and it is breakdown to eventually lead to cable.In order to improve cable anti-moisture performance, manufactory generallys use water suction
The low crosslinked polyethylene sheath of rate, but cannot fundamentally solve cable and " water tree " punch-through occurs.
To sum up, in order to improve bending resistance, the water preventing ability of railway cable, extend railway cable service life also need from
Railway cable is improved in structure.
Summary of the invention
For this not good enough problem of railway cable water preventing ability in practice, the object of the invention one is to propose a kind of bending resistance
Heat-insulated railway cable is rolled over, can effectively promote the water preventing ability of railway cable, while promoting the bending resistance of railway cable
And heat-proof quality, concrete scheme are as follows:
A kind of insulating water-proof railway cable resistant to bending, including core and be set in turn in outside core conductor screen, absolutely
Edge layer, insulation screen, water blocking layer and wrapped aluminium strip, the oversheath being set on water blocking layer, the water blocking layer include at least
Three-layer insulated glue-line is filled with conductive charcoal powder particles in porous spherical, the powdered carbon between adjacent two layers insulation glue-line
1/2 of the diameter of particle no more than distance between insulation glue-line described in adjacent two layers；
One or two insulation glue layer positioned at the water blocking layer middle position offers anti-aging cavity, the sky
Chamber section is integrally fan-shaped and fan shape center point is arranged away from the core, and insulating layer age resister is filled in the cavity.
Through the above technical solutions, adding colloid water blocking layer outside traditional insulation screen, electricity can be further promoted
The water preventing ability of cable.In addition, by the way that water blocking layer is divided into multilayer insulation glue-line and is filled between adjacent insulation glue-line spherical porous
Conductive charcoal powder particles, make water blocking layer when being pullled by bending first, spherical carbon powder particles can reduce insulation glue-line it
Between frictional force, small relative motion can occur between two neighboring insulation glue-line, so that the mechanical stress for the layer surface that blocks water
It is eased, is not transferred in the insulating layer inside cable, so that insulating layer is not likely to produce machinery in cable folding
Fatigue.When electric cable heating, deformation occurs for insulating layer, and the gap between above-mentioned insulation glue-line can also mention for the deformation of insulating layer
For expansion space, reduce the mechanical stress inside insulating layer.And charcoal powder particles have good thermal conductivity and heat accumulation, can
Heat is effectively absorbed or transmits heat to adjacent insulation glue-line, the aggregation of heat in a insulating layer is reduced, slows down
The Fracture aging of insulating layer inner part sub-key.In order to reduce " water tree " phenomenon, above-mentioned water blocking layer is arranged in core shielding
Except layer, insulation screen, core electric field can be effectively shielded, reduces influence of the core electric field to water blocking layer.For part
The electric field overflowed by above-mentioned two-layer screen layer, conductive charcoal powder particles, can be in adjacent two layers insulation glue-lines under the action of electric field
Between move, so that assembling more powdered carbon particle in the strong place of electric field force forms electric field shielding layer, and then be directed to
Weaken to property the electric field of overflow.
Further, it fills out inside the aperture of the charcoal powder particles equipped with iron powder.
Through the above technical solutions, the presence of iron powder, can not only enhance the stress of charcoal powder particles in the electric field, and electricity
The field strength of field can be attracted near charcoal powder particles, and then the field strength inside insulating layer near impurity can be by opposite weakening, no
" water tree " phenomenon is generated conducive to insulation glue layer；Further, since the characteristic of iron powder itself, can efficiently adsorb adjacent
Steam and oxygen between two layers of insulation glue-line, to slow down the aging speed of insulation glue-line and insulating layer.
Further, the thickness of insulation glue-line where the cavity and the insulation bondline thickness ratio without cavity be 4~
2:1.
It due to the presence of cavity, can be enriched with, be formed higher on the table wall of cavity from the electric field overflowed in insulation screen
Potential, through the above technical solution in thickness ratio, the resistance with cavity insulation glue-line can be enhanced and wear and water-resisting ability.
Further, the wrapped aluminium strip outside weld is connected to flat aluminium sheath, thickness and the wrapped aluminium strip of the flat aluminium sheath
Thickness ratio is 8~4:1.
Through the above technical solutions, not influencing cable fibre core while heat emission capabilities are more preferable, meet client not
With short circuit current demand, reduce cost.
Further, the wrapped clearance rate of the wrapped aluminium strip is 45%~50%.
Further, between the flat aluminium sheath and oversheath be equipped with hot melt adhesive layer, hot melt adhesive layer make flat aluminium sheath and
Tight bond and opposite slide is avoided between oversheath.
Through the above technical solutions, the bonding between flat aluminium sheath and oversheath can be made more close, the two is not
Relative motion easily occurs.
Further, the outer application graphite of the oversheath or extrusion semi-conductive layer are used as electrode.
Through the above technical solutions, DC test can be carried out to the oversheath of cable after the completion of cable laying,
With the oversheath of test cable whether in laid processes it is damaged.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) by adding handicapping water layer outside traditional insulation shield layer, and above-mentioned water blocking layer is arranged in multilayer, phase
Spherical conductive charcoal powder particles are filled between adjacent two insulation glue-lines, not only reduce the friction between insulation glue-line, are conducive to alleviate
Mechanical deflection stress inside cable is entered by cable surface, cable fatigue is avoided to damage, additionally it is possible to be produced inside absorbing cable
Raw heat slows down the aging speed of cable inner insulating layer or the glue-line that insulate；
(2) it by the way that conductive charcoal powder particles are arranged, can be directed to using the characteristic of conductive carbon powder particle itself in the electric field
Property shield overflow go out electric field, reduce insulation glue-line in " water tree " phenomenon generation, avoid cable breakdown；
(3) by adding iron powder in charcoal powder particles, electric field strength can be concentrated on nonisulated near charcoal powder particles
In the impurity of glue-line, insulating layer can be reduced or the breakdown probability of glue-line that insulate, while absorbing steam and oxygen, extend cable
Use the time.
Detailed description of the invention
Fig. 1 is overall schematic of the invention；
Fig. 2 is the partial enlargement diagram in the portion A in Fig. 1.
Appended drawing reference: 1, core；2, conductor screen；3, insulating layer；4, insulation screen；5, water blocking layer；6, around alclad
Band；7, oversheath；8, insulate glue-line；9, charcoal powder particles；10, cavity；11, age resister；12, flat aluminium sheath；13, hot melt adhesive
Layer；14, semi-conductive layer is squeezed out.
Specific embodiment
Below with reference to embodiment and figure, the present invention is described in further detail, but embodiments of the present invention not only limit
In this.
As shown in Figure 1, a kind of insulating water-proof railway cable resistant to bending, including core 1 and the line being set in turn in outside core 1
Core shielded layer 2, insulating layer 3, insulation screen 4, water blocking layer 5 and the wrapped aluminium strip 6 being set on water blocking layer 5, oversheath 7.
As shown in connection with fig. 2, above-mentioned water blocking layer 5 includes at least three-layer insulated glue-line 8, has been filled between adjacent two layers insulation glue-line 8
In the conductive charcoal powder particles 9 of porous spherical, the diameter of charcoal powder particles 9 is no more than distance between adjacent two layers insulation glue-line 8
1/2.It fills out inside above-mentioned spherical porous conductive charcoal powder particles 9 equipped with iron powder.Utilize above-mentioned spherical conductive charcoal powder particles 9, phase
Adjacent two layers of insulation glue-line 8 can be with relative motion, when cable is bent, and the surface stress of cable will not all be transmitted to inside
It insulate in glue-line 8 and insulating layer 3.Meanwhile above-mentioned charcoal powder particles 9 can have certain space, it can be in electric field
It is moved under the action of power, is gathered in the powerful place of electric field, also 4 overflow of insulation screen is gone out to a certain extent
Electric field has carried out targeted shielding.In addition, can be absorbed adjacent two using the heat absorption oxygen uptake characteristic of charcoal powder particles 9 itself
Layer insulation glue-line 8 between heat and stored, while can to penetrate into insulation glue-line 8 inside oxygen be inhaled
It receives, to slow down the aging of built-in electrical insulation glue-line 8 and insulating layer 3.In order to enable said effect is more obvious, in spherical powdered carbon
It fills out in grain 9 equipped with iron powder.In the above-mentioned cable of actual production, spherical carbon powder particles 9 are ejected into oxygen-free environment in powdered
The surface of insulation glue-line 8, the glue-line 8 that insulate at this time are in condensation phase, and surface has certain viscosity, can adhere to above-mentioned powdered carbon
Particle 9.
Anti-aging sky is offered as shown in Fig. 2, being located inside one or two insulation glue-line 8 in 5 middle position of water blocking layer
Chamber 10,10 section of cavity is integrally fan-shaped and fan shape center point is arranged away from core 1, anti-ageing filled with insulating layer 3 in cavity 10
Agent 11.The electric field that overflow goes out from conductor screen 2 and insulation screen 4 passes through conductive charcoal powder particles 9, it will is enriched to
It insulate in 8 inside impurity of glue-line or bubble, is easy to cause insulation glue-line 8 breakdown, by the cavity 10 of active setting, not only
The tensile resistance that can be insulated inside glue-line 8, additionally it is possible to which electric field strength is gathered into 10 surface of cavity.It is arranged by sector,
Electric field, which can be focused into the fan-shaped center far from cable core 1, to be assembled.
Optimization, it is worn and water-resisting ability to enhance with the insulate resistance of glue-line 8 of cavity 10, insulate glue-line where cavity 10
8 thickness is 4~2:1 with 8 thickness ratio of insulation glue-line without cavity 10.
In order to enable not influencing cable fibre core while heat emission capabilities are more preferable, meet client's difference short circuit current need
It asks, reduce cost, wrapped 6 outside weld of aluminium strip is connected to flat aluminium sheath 12, the thickness ratio of the thickness of flat aluminium sheath 12 and wrapped aluminium strip 6
For 8~4:1.Meanwhile the wrapped clearance rate of above-mentioned wrapped aluminium strip 6 is 45%~50%.
Hot melt adhesive layer 13 is equipped between flat aluminium sheath 12 and oversheath 7, hot melt adhesive layer 13 makes flat aluminium sheath 12 and outer shield
It covers tight bond between 7 and avoids opposite slide.Above-mentioned technical proposal can make viscous between flat aluminium sheath 12 and oversheath 7
Knot is more close, and the two is not susceptible to relative motion.
The outer application graphite or extrusion semi-conductive layer 14 of oversheath 7 are used as electrode, can be right after the completion of cable laying
The oversheath 7 of cable carries out DC test, with the oversheath 7 of test cable whether in laid processes it is damaged.
Insulating layer 3 in the present invention uses crosslinked polyethylene, and oversheath 7 preferably uses halogen-free and low-smoke flame-retardant polyolefin, absolutely
Edge glue-line 8 is preferably made of thermoplastic vulcanizates.
The present invention adds colloid water blocking layer 5 outside traditional insulation screen 4, can further promote blocking water for cable
Property.In addition, by the way that water blocking layer 5 is divided into multilayer insulation glue-line 8 and fills spherical porous conduction between adjacent insulation glue-line 8
Charcoal powder particles 9 make water blocking layer 5 when being pullled by bending first, and spherical carbon powder particles 9 can reduce between insulation glue-line 8
Frictional force, small relative motion can occur between two neighboring insulation glue-line 8, so that the mechanical stress on 5 surface of water blocking layer
It is eased, is not transferred in the insulating layer 3 inside cable, so that insulating layer 3 is not likely to produce machine in cable folding
Tool fatigue.When electric cable heating, deformation occurs for insulating layer 3, and the gap between above-mentioned insulation glue-line 8 can also be insulating layer 3
Deformation provides expansion space, reduces the mechanical stress inside insulating layer 3.And charcoal powder particles 9 have good thermal conductivity and storage
It is hot, heat can be effectively absorbed or transmit heat to adjacent insulation glue-line 8, reduce heat in insulating layer 3
Aggregation, slow down the Fracture aging of 3 inner part sub-key of insulating layer.In order to reduce " water tree " phenomenon, above-mentioned water blocking layer 5 is arranged
Except conductor screen 2, insulation screen 4,1 electric field of core can be effectively shielded, reduces 1 electric field of core to water blocking layer
5 influence.For the electric field that part is overflowed by above-mentioned two-layer screen layer, conductive charcoal powder particles 9, can be in phase under the action of electric field
It is moved between adjacent two layers of insulation glue-line 8, so that assembling more charcoal powder particles 9 in the strong place of electric field force forms electric field screen
Layer is covered, and then targetedly weakens the electric field of overflow, generally enables to the bending resistance of cable more preferable, while being had good
Good water preventing ability and anti-breakdown performance.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of insulating water-proof railway cable resistant to bending including core (1) and is set in turn in the conductor screen of core (1) outside
(2), insulating layer (3), insulation screen (4), water blocking layer (5) and the wrapped aluminium strip (6) being set on water blocking layer (5), outer shield
It covers (7), which is characterized in that
The water blocking layer (5) includes at least three-layer insulated glue-line (8), has been filled between adjacent two layers insulation glue-line (8) and is in
The conductive charcoal powder particles (9) of porous spherical, the diameter of the charcoal powder particles (9) is no more than the glue-line that insulate described in adjacent two layers
(8) the 1/2 of distance between；
Anti-aging cavity (10) are offered inside one or two insulation glue-line (8) in the water blocking layer (5) middle position,
Cavity (10) section is integrally fan-shaped and fan shape center point is arranged away from the core (1), filling in the cavity (10)
There is insulating layer (3) age resister (11)；
It fills out inside the aperture of the charcoal powder particles (9) equipped with iron powder.
2. insulating water-proof railway cable resistant to bending according to claim 1, which is characterized in where the cavity (10) absolutely
The thickness of edge glue-line (8) is 4~2:1 with insulation glue-line (8) thickness ratio without cavity (10).
3. insulating water-proof railway cable resistant to bending according to claim 1, which is characterized in that the wrapped aluminium strip (6) is outside
It is welded with flat aluminium sheath (12), the thickness of the flat aluminium sheath (12) and the thickness ratio of wrapped aluminium strip (6) are 8~4:1.
4. insulating water-proof railway cable resistant to bending according to claim 1, which is characterized in that the wrapped aluminium strip (6)
Wrapped clearance rate is 45%~50%.
5. insulating water-proof railway cable resistant to bending according to claim 3, which is characterized in that the flat aluminium sheath (12) and
Hot melt adhesive layer (13) are equipped between oversheath (7), hot melt adhesive layer (13) makes close between flat aluminium sheath (12) and oversheath (7)
It bonds and avoids opposite slide.
6. insulating water-proof railway cable resistant to bending according to claim 1, which is characterized in that outside the oversheath (7)
Side, which coats graphite or squeezes out semi-conductive layer (14), is used as electrode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710906761.7A CN107633906B (en) | 2017-09-29 | 2017-09-29 | A kind of insulating water-proof railway cable resistant to bending |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906761.7A CN107633906B (en) | 2017-09-29 | 2017-09-29 | A kind of insulating water-proof railway cable resistant to bending |
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| CN107633906A CN107633906A (en) | 2018-01-26 |
| CN107633906B true CN107633906B (en) | 2019-04-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109390101A (en) * | 2018-12-06 | 2019-02-26 | 深圳宝兴电线电缆制造有限公司 | Electric automobile high-tension line |
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|---|---|---|---|---|
| EP0209899A2 (en) * | 1985-07-23 | 1987-01-28 | The Furukawa Electric Co., Ltd. | Water impervious rubber or plastic insulated power cable |
| CN203882684U (en) * | 2014-06-05 | 2014-10-15 | 四川金瑞电工有限责任公司 | A novel water tree resistant power cable |
| CN105575489A (en) * | 2015-12-24 | 2016-05-11 | 长乐致远技术开发有限公司 | Wear-resistant watertight cable |
| CN205789264U (en) * | 2016-07-04 | 2016-12-07 | 福建成田科技有限公司 | A kind of have bird dispelling fire prevention and the cable of dual water-proof function |
| CN205992441U (en) * | 2016-08-23 | 2017-03-01 | 陈平 | A kind of have fire-retardant and heat sinking function cable |
| CN206471130U (en) * | 2017-01-23 | 2017-09-05 | 金良赞 | A kind of high waterproof railway cable of smooth aluminium set |
-
2017
- 2017-09-29 CN CN201710906761.7A patent/CN107633906B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0209899A2 (en) * | 1985-07-23 | 1987-01-28 | The Furukawa Electric Co., Ltd. | Water impervious rubber or plastic insulated power cable |
| CN203882684U (en) * | 2014-06-05 | 2014-10-15 | 四川金瑞电工有限责任公司 | A novel water tree resistant power cable |
| CN105575489A (en) * | 2015-12-24 | 2016-05-11 | 长乐致远技术开发有限公司 | Wear-resistant watertight cable |
| CN205789264U (en) * | 2016-07-04 | 2016-12-07 | 福建成田科技有限公司 | A kind of have bird dispelling fire prevention and the cable of dual water-proof function |
| CN205992441U (en) * | 2016-08-23 | 2017-03-01 | 陈平 | A kind of have fire-retardant and heat sinking function cable |
| CN206471130U (en) * | 2017-01-23 | 2017-09-05 | 金良赞 | A kind of high waterproof railway cable of smooth aluminium set |
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Address after: 213025 No. 128 Dongfang East Road, Changzhou City, Jiangsu Province Applicant after: XINCHENGRUI TECHNOLOGY Co.,Ltd. Address before: 213025 No. 128 Dongfang East Road, Changzhou City, Jiangsu Province Applicant before: Changzhou Ankaite Cable Co.,Ltd. |
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Denomination of invention: A bending resistant, heat-insulating and waterproof railway cable Effective date of registration: 20221216 Granted publication date: 20190405 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd. Pledgor: XINCHENGRUI TECHNOLOGY Co.,Ltd. Registration number: Y2022980026431 |