CN103117138A - Production method of nonmetal sheath, products and application thereof - Google Patents
Production method of nonmetal sheath, products and application thereof Download PDFInfo
- Publication number
- CN103117138A CN103117138A CN2013100341213A CN201310034121A CN103117138A CN 103117138 A CN103117138 A CN 103117138A CN 2013100341213 A CN2013100341213 A CN 2013100341213A CN 201310034121 A CN201310034121 A CN 201310034121A CN 103117138 A CN103117138 A CN 103117138A
- Authority
- CN
- China
- Prior art keywords
- metallic sheath
- sheath
- non metallic
- nonmetal
- thickness
- 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
Links
Abstract
The invention discloses a production method of a nonmetal sheath. The method includes: coating asphalt to a metal sheath to obtain a cable core, additionally winding a nonwoven layer to the cable core, and winding a nonmetal sheath to the outer surface of the nonwoven layer in a manner of extrusion. The invention further discloses the nonmetal sheath produced by the method, and application of the nonmetal sheath in high-voltage and ultrahigh-voltage cables. The minimum thickness of the nonmetal sheath is increased, so that material consumption and manufacturing cost are decreased while the minimum sheath thickness is guaranteed. Eccentricity of the nonmetal sheath for cables is reduced, so that the nonmetal sheath has the eccentricity better than that of the nonmetal sheath for cables produced by traditional methods, and cable quality is improved. Blockage of a vacuum pump caused by asphalt balls is avoided, bulging of the asphalt balls on the outer sheath is avoided, environmental sanitation of a production field can be improved, and requirements of related national standards are met.
Description
Technical field
The present invention relates to field of cables, preparation method who is specifically related to 110kV high pressure, extra-high-tension cable non metallic sheath and products thereof reaches and uses.
Background technology
according to 10.6.3 clause in " GB/T11017.1-2002 rated voltage 110kV (Um=126kV) power cable with cross-linked polyethylene insulation and annex thereof ", the minimum measured value of non metallic sheath thickness should be not less than the 85%-0.1mm of nominal thickness, 10.6.3 clause in " GB/Z18890.1-2002 rated voltage 220kV (Um=252kV) power cable with cross-linked polyethylene insulation and annex thereof ", the minimum detect thickness of cable jacket should be not less than the 85%-0.1mm of nominal thickness, , and 10.6.3 clause in " GB/Z22078.1-2008 rated voltage 500kV (Um=500kV) power cable with cross-linked polyethylene insulation and annex thereof ", the minimum detect thickness of cable jacket should be not less than the 85%-0.1mm of nominal thickness, , " IEC60840:2004, IDT ", " IEC62067:2006, MOD " in to the related request of the minimum detect thickness of oversheath.
Most producer directly enters extruder head after employing metallic sheath pitching and carries out extruding of non metallic sheath in manufacture course of products.The defective of the method is that the rough cable core of out-of-flatness enters extruder head, under the effect of pull of vacuum, the sheath material of molten state partly is filled in the ripple of metallic aluminium (or copper) sheath, make the non metallic sheath became uneven of extruding, manufacturing enterprise adopts in order to satisfy the minimum thickness requirement of GB regulation the method that increases material usage usually.Simultaneously, in manufacturing process, pitch group very easily is brought in the pipeline of vacuum pump or assembles agglomeratingly on the metallic sheath top layer, forms " the drum blister " of oversheath, sometimes also can burn vacuum pump, and the production scene is messy.Such cable will apply one deck cable pitch and be used for anticorrosion after metallic sheath, before non metallic sheath, because wrinkle aluminium (or copper) metallic sheath is corrugated, that out-of-flatness is rough, coat still out-of-flatness after pitch, extrude non metallic sheath on the out-of-flatness cable core, will certainly cause the thickness became uneven of sheath, maximum, the minimum value of jacket thickness have a long way to go, in serious situation, maximum is 2-3 times of minimum value, thereby reduced minimum thickness and the effective thickness of sheath, both wasted material, can not guarantee again the mechanical electric performance of product.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of high pressure, extra-high-tension cable non metallic sheath preparation method and products thereof and use.
Technical scheme: for achieving the above object, the preparation method of a kind of non metallic sheath provided by the invention, described method obtains cable core after being included in the metallic sheath asphalt-coating, adds around layer of non-woven fabric on cable core, then carries out extruding of non metallic sheath.
Preferably, described nonwoven fabrics belongs to fiber substance, the thermal resistivity of described nonwoven fabrics≤3.5 ρ T/ (K.m.w
-1).
Preferably, described nonwoven thickness is 0.2mm and following, and the nonwoven fabrics width is more than or equal to the cable core diameter, and the wrapped rate of putting up of nonwoven fabrics is 0～5%.
Preferably, the minimum thickness of described non metallic sheath is more than 90% of nominal thickness reaches.
Preferably, the degree of eccentricity of described non metallic sheath be reduced to 12% and below.
Wherein, the invention also discloses the non metallic sheath made from said method, described non metallic sheath also comprises the layer of non-woven fabric layer.
Wherein, the invention also discloses the application of non metallic sheath in high pressure, extra-high-tension cable made from said method.
Beneficial effect: the present invention adds around layer of non-woven fabric after the metallic sheath asphalt-coating, make cable core become smooth smooth before extruding non metallic sheath, improved the minimum thickness of non metallic sheath, in the situation that guarantee minimum oversheath thickness, reduce material usage, saved manufacturing cost; Lower the degree of eccentricity of cable non metallic sheath, made the degree of eccentricity of the non metallic sheath of its cable that is better than the conventional method manufacturing, improved the cable quality; Can not exist pitch to roll into a ball the phenomenon of stopping up vacuum pump, can not produce pitch group " drum blister " phenomenon yet on oversheath, be conducive to improve the environmental sanitation of production scene, thereby satisfy the requirement of concerned countries standard.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
High pressure of the present invention, extra-high-tension cable are commonly referred to as the cable of 48/66kV, 64/110kV, 127/220kV, 290/500kV.
Embodiment 1
A kind of high pressure, extra-high-tension cable non metallic sheath preparation method, described method obtains cable core after being included in the metallic sheath asphalt-coating, adds around layer of non-woven fabric on cable core, then carries out extruding of non metallic sheath.Described nonwoven fabrics belongs to fiber substance, and the thermal resistivity of described nonwoven fabrics is 3.5 ρ T/ (K.m.w
-1).Described nonwoven thickness is 0.2mm, and the nonwoven fabrics width equals the cable core diameter, and the wrapped rate of putting up of nonwoven fabrics is 1%.Described non metallic sheath minimum thickness is 91% of nominal thickness.The degree of eccentricity of described non metallic sheath is reduced to 9%.
Table 1
Data show from table 1, add around nonwoven fabrics after use the present invention and carry out directly extruding after non metallic sheath extrudes than pitch again, its sheath minimum thickness is significantly increased, and the degree of eccentricity declines to a great extent, average thickness and maximum ga(u)ge also descend to some extent, thereby have also saved material usage.
Embodiment 2
A kind of high pressure, extra-high-tension cable non metallic sheath preparation method, described method obtains cable core after being included in the metallic sheath asphalt-coating, adds around layer of non-woven fabric on cable core, then carries out extruding of non metallic sheath.Described nonwoven fabrics belongs to fiber substance, and the thermal resistivity of described nonwoven fabrics is 2.5 ρ T/ (K.m.w
-1).Described nonwoven thickness is 0.1mm, and the nonwoven fabrics width equals the cable core diameter, and the wrapped rate of putting up of nonwoven fabrics is 2%.Described non metallic sheath minimum thickness is 90% of nominal thickness.The degree of eccentricity of described non metallic sheath is reduced to 12%.
Table 2
Data show from table 2,1) use to add around nonwoven fabrics after the present invention and carry out directly extruding after non metallic sheath extrudes than pitch, its sheath minimum thickness is significantly increased, and the degree of eccentricity declines to a great extent, average thickness and maximum ga(u)ge also descend to some extent, thereby have also saved material usage; 2) do not adopt the present invention, directly extrude oversheath and the defective phenomenon of sheath minimum thickness even can occur.
Embodiment 3
A kind of high pressure, extra-high-tension cable non metallic sheath preparation method, described method obtains cable core after being included in the metallic sheath asphalt-coating, adds around layer of non-woven fabric on cable core, then carries out extruding of non metallic sheath.Described nonwoven fabrics belongs to fiber substance, and the thermal resistivity of described nonwoven fabrics is 1.5 ρ T/ (K.m.w
-1).Described nonwoven thickness is 0.15mm, and the nonwoven fabrics width equals the cable core diameter, and the wrapped rate of putting up of nonwoven fabrics is 5%.Described non metallic sheath minimum thickness is 92% of nominal thickness.The degree of eccentricity of described non metallic sheath is reduced to 11%.
Table 3
Data show from table 3,1) use to add around nonwoven fabrics after the present invention and carry out directly extruding after non metallic sheath extrudes than pitch, its sheath minimum thickness is significantly increased, and the degree of eccentricity declines to a great extent, average thickness and maximum ga(u)ge also descend to some extent, thereby have also saved material usage; 2) do not adopt the present invention, directly extrude oversheath and the defective phenomenon of sheath minimum thickness even can occur.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. the preparation method of a non metallic sheath, it is characterized in that: described method obtains cable core after being included in the metallic sheath asphalt-coating, adds around layer of non-woven fabric on cable core, then carries out extruding of non metallic sheath.
2. the preparation method of a kind of non metallic sheath claimed in claim 1, it is characterized in that: described nonwoven fabrics belongs to fiber substance, the thermal resistivity of described nonwoven fabrics≤3.5 ρ T/ (K.m.w
-1).
3. the preparation method of a kind of non metallic sheath claimed in claim 1, it is characterized in that: described nonwoven thickness is 0.2mm and following, and the nonwoven fabrics width is more than or equal to the cable core diameter, and the wrapped rate of putting up of nonwoven fabrics is 0～5%.
4. the preparation method of a kind of non metallic sheath claimed in claim 1 is characterized in that: described non metallic sheath minimum thickness be nominal thickness 90% and more than.
5. the preparation method of a kind of non metallic sheath claimed in claim 1 is characterized in that: the degree of eccentricity of described non metallic sheath be reduced to 12% and below.
6. the non metallic sheath made of according to claim 1～5 described methods of any one, it is characterized in that: described non metallic sheath also comprises the layer of non-woven fabric layer.
7. the application of non metallic sheath claimed in claim 6 in high pressure, extra-high-tension cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100341213A CN103117138A (en) | 2013-01-29 | 2013-01-29 | Production method of nonmetal sheath, products and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100341213A CN103117138A (en) | 2013-01-29 | 2013-01-29 | Production method of nonmetal sheath, products and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103117138A true CN103117138A (en) | 2013-05-22 |
Family
ID=48415486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100341213A Pending CN103117138A (en) | 2013-01-29 | 2013-01-29 | Production method of nonmetal sheath, products and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103117138A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2674608Y (en) * | 2003-10-31 | 2005-01-26 | 江苏上上电缆集团有限公司 | Medium-and high-voltage wire armoured power cable capable of preventing white ant |
| CN2888608Y (en) * | 2005-12-23 | 2007-04-11 | 江苏上上电缆集团有限公司 | Anti termite and anti corrosion power cable of 0.6/1KV and below |
| US20110174519A1 (en) * | 2010-01-15 | 2011-07-21 | Applied Nanostructured Solutions, Llc | Cnt-infused fiber as a self shielding wire for enhanced power transmission line |
-
2013
- 2013-01-29 CN CN2013100341213A patent/CN103117138A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2674608Y (en) * | 2003-10-31 | 2005-01-26 | 江苏上上电缆集团有限公司 | Medium-and high-voltage wire armoured power cable capable of preventing white ant |
| CN2888608Y (en) * | 2005-12-23 | 2007-04-11 | 江苏上上电缆集团有限公司 | Anti termite and anti corrosion power cable of 0.6/1KV and below |
| US20110174519A1 (en) * | 2010-01-15 | 2011-07-21 | Applied Nanostructured Solutions, Llc | Cnt-infused fiber as a self shielding wire for enhanced power transmission line |
Non-Patent Citations (1)
| Title |
|---|
| 梁国华: ""110kV交联电缆外护层制造新工艺"", 《电线电缆》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101977452B (en) | Self-temperature limiting heat tracing belt and manufacturing method thereof | |
| CN101339824A (en) | Composite insulating tube type bus and method for preparing the same | |
| CN105575460A (en) | Insulating aerial aluminum alloy cable and preparation method thereof | |
| CN104575824A (en) | Fission isolation capacity-increasing high voltage power cable with high bonding insulation and manufacturing method | |
| CN103117138A (en) | Production method of nonmetal sheath, products and application thereof | |
| CN204680434U (en) | Integral type dry type insulating tube type busbar | |
| CN207781221U (en) | 500kV and following submarine cable are blocked water copper conductor with big section | |
| CN103366897A (en) | VCV vertical type L-shaped chemical crosslinking cable production process and bearing vertical tower | |
| CN203787147U (en) | Shielded heat-shrinkable sleeve | |
| CN203535994U (en) | Local self-adhesive paint layer low self-adhesive layer transposed conductor for transformer | |
| CN204332508U (en) | A kind of light-duty photoelectricity composite power cable | |
| CN201698821U (en) | Water-blocking power cable | |
| CN204130198U (en) | A kind of two core cross linked insulation fireproof power cables | |
| CN103137266A (en) | Method for manufacturing power cables | |
| CN204423982U (en) | A kind of three-phase twisted cable | |
| CN203056527U (en) | Cable traction head | |
| CN202601273U (en) | Moisture-proof wire | |
| CN205522388U (en) | Wire and cable pipe extruder | |
| CN205177434U (en) | Resist back crosslinked polyethylene insulated cable that contracts | |
| CN204303435U (en) | A kind of split isolation volume enlarging high pressure power cable of the insulation that bonds | |
| CN201838381U (en) | Overhead insulated cable | |
| CN203552747U (en) | Transformer paper-insulated enamelled combination wire with partial self-adhesive enamelled coatings | |
| CN202996422U (en) | Aluminum conductor pressing device for insulated cable manufacturing | |
| CN204303449U (en) | One extrudes flat aluminium sheath high voltage power cable | |
| CN202584951U (en) | Device for producing protective covering of 110kV cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130522 |