CN210489302U - Tensile waterproofing type power cable - Google Patents
Tensile waterproofing type power cable Download PDFInfo
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- CN210489302U CN210489302U CN201921559024.5U CN201921559024U CN210489302U CN 210489302 U CN210489302 U CN 210489302U CN 201921559024 U CN201921559024 U CN 201921559024U CN 210489302 U CN210489302 U CN 210489302U
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Abstract
The utility model discloses a tensile water-blocking power cable, which comprises a tinned copper conductor, wherein a semi-conductive conductor shielding layer and a plastic insulating layer are sequentially extruded outside the tinned copper conductor to form a wire core; the manufacturing method comprises the following steps of winding a PTFE (polytetrafluoroethylene) winding tape outside a wire core, winding a flame-retardant water-blocking tape outside the PTFE winding tape, winding an anti-corrosion semi-conductive buffering water-blocking tape after weaving an aramid fiber tensile element outside the flame-retardant water-blocking tape, coating an acrylic waterproof coating layer outside a metal tensile pipe after sleeving the anti-corrosion semi-conductive buffering water-blocking tape with the metal tensile pipe, and coating a polyfluorinated ethylene propylene outer sheath outside the acrylic waterproof coating layer. The utility model discloses have tensile strength, elongation at break, dampproofing and leakproofness characteristic such as good for the life of cable improves greatly.
Description
Technical Field
The utility model relates to a power cable field especially relates to a tensile waterproofing type power cable.
Background
When the power cable runs, the current of the cable core can generate a strong electric field, impurities and air holes in the insulating layer and the protruding pricks and damaged parts of the inner and outer shielding layers can generate a water tree phenomenon due to the penetration of water, so that the discharging and even the cable breakdown are generated in the insulating layer, and the electric field is buffered by a semi-conductive material with a water blocking function. And because the cable core load changes and can produce the difference in temperature and make metal sheath produce expend with heat and contract with cold the phenomenon, consequently, must leave the clearance in the metal sheath inboard, but this clearance if not fill just can have water infiltration to take place the breakdown accident. There is a need for an elastic water-blocking material that not only has a water-blocking function, but also can be changed in a telescopic manner along with expansion and contraction of a metal sheath, thereby playing a mechanical buffering role. In order to solve the problems, a semi-conductive buffer water-blocking tape is generally adopted at present. However, the existing semiconductive buffering water-blocking tape can play a role in semiconductive shielding and electric field buffering, but does not have an anti-corrosion function, cannot play an effective protection role on a metal sheath, and often causes certain damage in the use process of a cable, so that the normal use and the service life of the cable are influenced.
The existing non-woven fabric used as the cable water-blocking tape is formed by coating water-absorbent resin on one side or two sides of a base band, although the water-blocking tape structure can meet the waterproof requirement, the water-blocking tape is easy to damage because the function of the water-blocking tape is limited to play a role in water blocking, and a protected cable inside the water-blocking tape still contacts water when the water-blocking tape is damaged and water enters, so that the insulation aging of an inner conductor or the oxidation of a metal shielding layer are caused; moreover, the water-blocking tape has no flame-retardant function, which undoubtedly increases the potential safety hazard of the cable.
And the existing single-core cable has poor tensile property, is easy to be crushed and deformed, and is easy to break after being bent, thereby influencing the service life of the cable.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tensile waterproofing type power cable that has tensile strength, elongation at break, dampproofing and the leakproofness is good just for solving above-mentioned problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a tensile water-blocking power cable comprises a tinned copper conductor, wherein a semi-conductive conductor shielding layer and a plastic insulating layer are sequentially extruded outside the tinned copper conductor to form a wire core; the manufacturing method comprises the following steps of winding a PTFE (polytetrafluoroethylene) winding tape outside a wire core, winding a flame-retardant water-blocking tape outside the PTFE winding tape, winding an anti-corrosion semi-conductive buffering water-blocking tape after weaving an aramid fiber tensile element outside the flame-retardant water-blocking tape, coating an acrylic waterproof coating layer outside a metal tensile pipe after sleeving the anti-corrosion semi-conductive buffering water-blocking tape with the metal tensile pipe, and coating a polyfluorinated ethylene propylene outer sheath outside the acrylic waterproof coating layer.
The PTFE tape comprises a PTFE microporous fiber layer which is not completely sintered in the middle, and polytetrafluoroethylene thin film layers which are completely sintered on the upper side and the lower side of the PTFE microporous fiber layer.
The flame-retardant water-blocking tape comprises a non-woven fabric base material layer, wherein the upper surface of the non-woven fabric base material layer is adhered with water-absorbent resin through an adhesive, and the lower surface of the non-woven fabric base material layer is adhered with a flame-retardant glass fiber tape through the adhesive.
The anticorrosion semiconductive buffering water-blocking tape comprises a fiberglass tape base material layer, wherein the upper surface of the fiberglass tape base material layer is sequentially adhered with a water-based semiconductive adhesive layer containing superconducting carbon black, a water-absorbing resin layer, a rubber buffer layer and a corrosion-resistant adhesive layer from bottom to top through adhesives, and the lower surface of the fiberglass tape base material layer is sequentially adhered with the water-based semiconductive adhesive layer containing superconducting carbon black, the water-absorbing resin layer, the rubber buffer layer and the corrosion-resistant adhesive layer from top to bottom through adhesives.
The further improvement is that the metal tensile pipe is a corrugated copper pipe formed by longitudinally wrapping, welding, rolling and twisting a thin copper strip.
Compared with the prior art, beneficial effect lies in:
1. the semi-conductive shielding layer is arranged on the outer surface of the conductor and is made of a semi-conductive material with low resistivity and thin thickness, and the semi-conductive shielding layer is used for homogenizing an electric field on the outer surface of the conductor and avoiding partial discharge of the conductor and insulation caused by unsmooth surface of the conductor and air gaps generated by twisting of wire cores;
2. the compound PTFE lapped tape has better tensile strength, elongation at break and compressive property than common low-density microporous polytetrafluoroethylene under the condition of keeping lower dielectric constant and dielectric loss than polytetrafluoroethylene tapes, so that the tensile strength, elongation at break and compressive property of the cable are improved; the wrapping flame-retardant water-blocking tape is added, so that the flame-retardant performance and the water-blocking performance of the cable core are improved;
3. the aramid fiber tensile element is adopted to replace a steel wire armored tensile element, so that the tensile strength of the cable is greatly improved, the flexibility is good, the cable has good oxidation resistance and flame retardant property, the elongation at break is small, and the cable is not easy to deform; in addition, the density of the aramid fiber material is greatly reduced, and the weight of the cable can be greatly reduced under the same tensile strength requirement;
4. the anti-corrosion semi-conductive buffering water-blocking tape is wrapped, wherein the semi-conductive layer adopts water-based semi-conductive glue containing the superconducting carbon black, and the semi-conductive property of the water-based semi-conductive buffering water-blocking tape is utilized, so that the cable core can play a role in buffering and homogenizing the electric field intensity, and the cable is effectively prevented from being punctured; the water absorbing material layer is made of a high-molecular water-absorbent resin material, and when water permeates, the high-molecular water-absorbent resin in the water absorbing material layer absorbs water to expand to form barrier, so that the water can be effectively prevented from further permeating; the buffer layer plays a role of mechanical buffering; the cable is also provided with the corrosion-resistant layer, and the corrosion-resistant layer can be a water-based corrosion-resistant adhesive layer and has excellent corrosion resistance and acid and alkali resistance, so that the cable can be protected against corrosion, and the service life of the cable can be prolonged;
5. the metal tensile pipe is arranged, so that the cable is good in compression resistance, moisture resistance and sealing performance, and the bending performance of the cable can be improved by embossing;
6. the cable adopts fluorinated ethylene propylene as an outer sheath, has good high and low temperature resistance, can be used for a long time in an environment of-250-200 ℃, has good wear resistance, excellent self-lubricating property and excellent electrical insulation property, is not influenced by working environment, humidity, temperature and frequency, has good arc resistance, has higher flame retardance and corrosion resistance, does not react with other chemicals except fluorine elements, molten alkali metal, chlorine trifluoride and the like at high temperature, has stable property, and is not easy to be corroded by the chemicals. And has the advantages of good air tightness, radiation resistance, good low-temperature flexibility, strong bonding force with metal and glass, and the like.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of a PTFE tape;
FIG. 3 is a schematic structural view of a flame-retardant water-blocking tape;
fig. 4 is a schematic structural view of the anti-corrosion semiconductive buffering water-blocking tape.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1, a tensile waterproof power cable comprises a tinned copper conductor 1, so that the tensile strength of the cable is better; a semi-conductor shielding layer 2 and a plastic insulating layer 3 are sequentially extruded outside the tin-plated copper conductor 1 to form a wire core; the anti-aging and anti-corrosion waterproof coating is characterized in that a PTFE (Polytetrafluoroethylene) wrapping tape 4 is wrapped outside a wire core, a flame-retardant water-blocking tape 5 is wrapped outside the PTFE wrapping tape, an anti-corrosion semiconductive buffering water-blocking tape 7 is wrapped after an aramid fiber tensile element 6 is woven outside the flame-retardant water-blocking tape, an acrylic waterproof coating layer 9 is coated outside a metal tensile tube 8 after the metal tensile tube is sleeved outside the anti-corrosion semiconductive buffering water-blocking tape, and a single-component water emulsion type waterproof coating is prepared by taking pure acrylic polymer emulsion as a base material and adding other additives and plays a role in improving the aging resistance, the extensibility and the corrosion resistance of the metal; the outer sheath 10 of the fluorinated ethylene propylene is coated outside the acrylic waterproof coating layer, the high-low temperature resistance performance is good, the acrylic waterproof coating can be used for a long time in an environment of-250-200 ℃, the wear resistance is good, the self-lubricating performance is excellent, the electric insulating performance is excellent, the acrylic waterproof coating is not influenced by the working environment, the humidity, the temperature and the frequency, the arc resistance is good, the flame retardance and the corrosion resistance are high, the acrylic waterproof coating does not react with other chemicals except fluorine elements, molten alkali metal, chlorine trifluoride and the like at high temperature, the properties are stable, and the acrylic waterproof coating is not easily corroded by the chemicals. And has the advantages of good air tightness, radiation resistance, good low-temperature flexibility, strong bonding force with metal and glass, and the like.
As shown in fig. 2, the PTFE lapped tape 4 includes a PTFE microporous fiber layer 41 which is not completely sintered in the middle, and polytetrafluoroethylene film layers 42 which are completely sintered on the upper and lower sides of the PTFE microporous fiber layer, so that the tensile strength, the elongation at break and the compressive strength of the cable are improved; and the wrapping flame-retardant water-blocking tape is added, so that the flame-retardant performance and the water-blocking performance of the cable core are improved.
As shown in fig. 3, the flame-retardant water-blocking tape 5 comprises a non-woven fabric substrate layer 51, wherein the upper surface of the non-woven fabric substrate layer is adhered with a water-absorbent resin 52 through an adhesive, and the lower surface of the non-woven fabric substrate layer is adhered with a flame-retardant glass fiber tape 53 through an adhesive;
as shown in fig. 4, the anti-corrosion semiconductive buffering water-blocking tape 7 comprises a glass fiber tape base material layer 71, wherein an aqueous semiconductive adhesive layer 72 containing superconducting carbon black, a water-absorbing resin layer 73, a rubber buffer layer 74 and a corrosion-resistant adhesive layer 75 are sequentially adhered to the upper surface of the glass fiber tape base material layer from bottom to top through adhesives, and an aqueous semiconductive adhesive layer containing superconducting carbon black, a water-absorbing resin layer, a rubber buffer layer and a corrosion-resistant adhesive layer are sequentially adhered to the lower surface of the glass fiber tape base material layer from top to bottom through adhesives; the semi-conductive layer adopts water-based semi-conductive adhesive containing superconducting carbon black, and the semi-conductive property of the semi-conductive layer is utilized, so that the cable core can play a role in buffering and homogenizing the electric field intensity, and the cable is effectively prevented from being punctured; the water absorbing material layer is made of a high-molecular water-absorbent resin material, and when water permeates, the high-molecular water-absorbent resin in the water absorbing material layer absorbs water to expand to form barrier, so that the water can be effectively prevented from further permeating; the buffer layer plays a role of mechanical buffering; still be provided with corrosion-resistant layer, corrosion-resistant layer can be waterborne corrosion-resistant glue film, and it has excellent corrosion-resistant, acid and alkali resistance, consequently can play corrosion-resistant guard action to the cable to can prolong the life of cable.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a tensile waterproofing type power cable which characterized in that: the cable core is formed by sequentially extruding a semiconductive conductor shielding layer and a plastic insulating layer outside a tinned copper conductor; the manufacturing method comprises the following steps of winding a PTFE (polytetrafluoroethylene) winding tape outside a wire core, winding a flame-retardant water-blocking tape outside the PTFE winding tape, winding an anti-corrosion semi-conductive buffering water-blocking tape after weaving an aramid fiber tensile element outside the flame-retardant water-blocking tape, coating an acrylic waterproof coating layer outside a metal tensile pipe after sleeving the anti-corrosion semi-conductive buffering water-blocking tape with the metal tensile pipe, and coating a polyfluorinated ethylene propylene outer sheath outside the acrylic waterproof coating layer.
2. The tension-resistant water-blocking power cable according to claim 1, wherein: the PTFE tape comprises a PTFE microporous fiber layer which is not completely sintered in the middle, and polytetrafluoroethylene thin film layers which are completely sintered on the upper side and the lower side of the PTFE microporous fiber layer.
3. The tension-resistant water-blocking power cable according to claim 1, wherein: the flame-retardant water-blocking tape comprises a non-woven fabric substrate layer, wherein the upper surface of the non-woven fabric substrate layer is adhered with water-absorbent resin through an adhesive, and the lower surface of the non-woven fabric substrate layer is adhered with a flame-retardant glass fiber tape through the adhesive.
4. The tension-resistant water-blocking power cable according to claim 1, wherein: the anti-corrosion semiconductive buffering water-blocking tape comprises a glass fiber tape base material layer, wherein the upper surface of the glass fiber tape base material layer is sequentially adhered with a water-based semiconductive adhesive layer containing superconducting carbon black, a water-absorbing resin layer, a rubber buffer layer and a corrosion-resistant adhesive layer from bottom to top through adhesives, and the lower surface of the glass fiber tape base material layer is sequentially adhered with a water-based semiconductive adhesive layer containing superconducting carbon black, a water-absorbing resin layer, a rubber buffer layer and a corrosion-resistant adhesive layer from top to bottom through adhesives.
5. The tension-resistant water-blocking power cable according to claim 1, wherein: the metal tensile pipe is a corrugated copper pipe formed by longitudinally wrapping, welding, rolling and twisting a thin copper strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921559024.5U CN210489302U (en) | 2019-09-19 | 2019-09-19 | Tensile waterproofing type power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921559024.5U CN210489302U (en) | 2019-09-19 | 2019-09-19 | Tensile waterproofing type power cable |
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| CN210489302U true CN210489302U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921559024.5U Active CN210489302U (en) | 2019-09-19 | 2019-09-19 | Tensile waterproofing type power cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899938A (en) * | 2020-08-03 | 2020-11-06 | 远程电缆股份有限公司 | Flame-retardant water-blocking tape for high-voltage cable and preparation method thereof |
-
2019
- 2019-09-19 CN CN201921559024.5U patent/CN210489302U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899938A (en) * | 2020-08-03 | 2020-11-06 | 远程电缆股份有限公司 | Flame-retardant water-blocking tape for high-voltage cable and preparation method thereof |
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