CN109616262A - The high speed production process of 64/110kV power-frequency electromagnetic fields - Google Patents
The high speed production process of 64/110kV power-frequency electromagnetic fields Download PDFInfo
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- CN109616262A CN109616262A CN201811619899.XA CN201811619899A CN109616262A CN 109616262 A CN109616262 A CN 109616262A CN 201811619899 A CN201811619899 A CN 201811619899A CN 109616262 A CN109616262 A CN 109616262A
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- conductor
- nitrogen
- cooling
- cable
- leading portion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/145—Pretreatment or after-treatment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
- H01B13/002—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment for heat extraction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
Abstract
The invention discloses a kind of high speed production process of 64/110kV power-frequency electromagnetic fields, it is wrapped up including the heating of conductor leading portion, conductor insulation, leading portion nitrogen is cooling, vulcanization, the heating of conductor back segment, back segment nitrogen is cooling, cable reverses and take-up step, conductor leading portion is heated to increasing conductor temperature by 50-60 DEG C, conductor back segment is heated to increasing conductor temperature by 50-60 DEG C, the degree of cross linking of crosslinked polyethylene is set as 98.7%, and the linear velocity of cable production is 1.46-2.00m/min.The present invention can improve the speed of production of the crosslinked polyetylene insulated core of high voltage power cable to greatest extent in the case where guaranteeing product quality, shorten the delivery cycle.
Description
Technical field
The present invention relates to dust catcher production technical field, in particular to a kind of 64/110kV high-voltage cross-linking polythene insulated electro
The high speed production process of power cable.
Background technique
Global power is issued in the recent period according to the third-largest research institution's platform Persistence Market Research in the whole world
Cable market research report claims, and 2018-2026 global power cable market year compound gaining rate is estimated to reach 7.2%.In report
Think, developing country's industrialization, Development of China's Urbanization are accelerated, and the industrialization maturation of developed country upgrades to power cable and needs
Increase is asked, renewable energy continuous development is the main reason for pushing the steady growth of global power cable market in addition.
High voltage power cable is big with its current-carrying capacity, the advantages that being not take up aboveground space, long service life, in power cable city
Leading position is occupied on.Especially for China this in the world for maximum developing country, high voltage power cable needs
The amount of asking is huge.
Crosslinked polyethylene (XLPE) is by itself excellent electrical property, processing performance and higher running temperature by high pressure
The favor of power cable.According to statistics, XLPE is the most commonly used insulating materials of high voltage power cable in the world.The poly- second of high-voltage crosslinking
The insulating process of alkene insulated power cable is all familiar with regard to two kinds of production technology insiders common in global range at present,
That is (vertical) the crosslinking production technology of VCV and CCV (catenary suspension type continuous vulcanization) are crosslinked production technology.
Early in last century the eighties, the scientific and technical personnel of external cables manufacturing industry utilize CCV crosslinking cable production line to produce
High-voltage crosslinking wire and cable, at that time problem is encountered that being caused since XLPE insulating materials generates " tenesmus " in the molten state
Insulation eccentricity is exceeded, so that it is thought that using vertical method (vertical extrudes XLPE Insulation Material from the top down) to keep away
The bias for exempting from insulation, then produces VCV vertical cross-linked production technology.However, the section of external cable industry and equipment manufacture
Skill personnel do not abandon the technical study with CCV crosslinking cable production line production high-tension cable, and scientific and technical personnel pass through to high pressure
The research of cable insulating materials rheological property, improves electrical cable-making apparatus, flow channel improves, especially right
The insulating exruded production line of XLPE disengaging the change of mode of traction, the raising of extruder temperature controller precision, crosslinking process temperature it is excellent
Change, the raising of automatic control in the production line degree, so that CCV crosslinking cable production line production high voltage cross-linking power cable early has become
Reality, insulation concentricity can compare favourably completely with VCV cross-linking production line technique.
Although CCV crosslinking cable production line production high voltage cross-linking power cable has overcome insulation concentricity issues,
It is how to promote the speed of production of production line to greatest extent in the case where guaranteeing product quality, the shortening delivery cycle becomes
Urgent problem.
Summary of the invention
The purpose of the present invention is to provide a kind of high speeds of 64/110kV power-frequency electromagnetic fields
Production technology can improve the crosslinked polyetylene insulated line of high voltage power cable to greatest extent in the case where guaranteeing product quality
The speed of production of core shortens the delivery cycle.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of high speed production process of 64/110kV power-frequency electromagnetic fields, including conductor leading portion are heated, are led
Body insulation is wrapped up, leading portion nitrogen is cooling, vulcanization, the heating of conductor back segment, back segment nitrogen is cooling, cable reverses and take-up step, is led
Body leading portion is heated to increasing conductor temperature by 50-60 DEG C, and conductor back segment is heated to increasing conductor temperature by 50-60 DEG C, and crosslinking is poly-
The degree of cross linking of ethylene is set as 98.7%, and the linear velocity of cable production is 1.46-2.00m/min.
The main improvement that the present invention improves speed of production is the following aspects:
1, control specific conductor leading portion, back segment heating: conductor leading portion, back segment heating are to make conductor by induction heating conductor
Heat can be provided in inside, accelerate crosslinking rate.Due to the limitation of VCV itself, conventional way can only increase conductor as far as possible
The temperature that leading portion, back segment heat, the speed of production of Lai Tigao high voltage power cable.Insulated wire cores be will lead in this way in tube-cooled
When conductor also heated to core, this influences the core shift of cable and service life very big.By improving, we will be led
Body leading portion, back segment heating temperature are set as 50-60 DEG C, are adjusted with the heating temperature significantly lower than VCV, and discovery can guarantee to be crosslinked
While spending, accelerate the cooling of insulated wire cores, improves the quality of product and the speed of production of cable.
2, reduce degree of cross linking requirement: national regulations heat extends≤175%, and the requirement of our factory is≤100%.Previous is to guarantee
The degree of cross linking artificially can be set as 99.5% when NCC is calculated by the qualification that heat extends, and the heat that detected in this way extends in 60~
75%.But the excessively high degree of cross linking requires to will limit speed of production, passes through recent test and research, it has been found that NCC is set as
Heat when 98.7%, which extends, equally to be met the requirements, and can improve speed of production.
3, reduce curing temperature: curing tube comes together to protect by external heating insulated wire cores and conductor leading portion, back segment heating
Demonstrate,prove the degree of cross linking.Conventional VCV technique is 4 sections of heating, and heating temperature is high, affects speed of production.By recent test and
Research, we have developed new sulfuration process, and while reducing curing temperature, using eight sections of heating methods, setting is specific
Heating temperature can make insulated wire cores and reach the requirement of the conductor degree of cross linking by lower temperature, the heating of long period, while compared with
Low temperature can reduce the influence to external shield (insulation shielding), reduce the stress of insulating inner, extend insulated wire cores
Service life.
4, lower leading portion nitrogen cools down (EHT, proximal segment heat treatment technics) temperature setting: the use of EHT equipment, can incite somebody to action
The melting of insulation and crosslinking all under its control, can the study found that leading portion nitrogen is cooling to use specific 30-40 DEG C of temperature
So that insulation shielding material at solid-state, to support built-in electrical insulation, prevents sagging.It begins to cool, guarantees from outer layer insulation shielding
Insulation it is concentric.After the cooling of leading portion nitrogen, start Quick cross-linking, primary insulation is shielded by solid outer layer insulation at this time
Support, is then supported again by being crosslinked the primary insulation of completion, ensure that the degree of cross linking.Lower leading portion nitrogen cooling temperature is set
It is fixed, guarantee the quality of cable while can be improved speed of production.
The conductor insulation package is wrapped up the conductor after leading portion heating, by conductor shielding material extruder, insulation
The common low temperature of shielding material extruder, Insulation Material extruder squeezes out, to conductor formation be followed successively by from the inside to the outside conductor shielding, insulation,
The package of insulation shielding.
The temperature that low temperature squeezes out is at 128-132 DEG C.
The leading portion nitrogen is cooling in such a way that injection nitrogen is cooling, and nitrogen temperature used is 30-40 DEG C, leading portion nitrogen
The total length of air cooling is in 4-4.5m.
The vulcanization is using eight sections of vulcanizations, specifications and models 400mm2Cable eight sections of curing temperatures are as follows: 245 DEG C, 305
DEG C, 275 DEG C, 265 DEG C, 255 DEG C, 255 DEG C, 245 DEG C, 220 DEG C；Specifications and models 630mm2Cable eight sections of curing temperatures are as follows:
245 DEG C, 295 DEG C, 285 DEG C, 280 DEG C, 275 DEG C, 255 DEG C, 250 DEG C, 220 DEG C；Specifications and models 1200mm2Cable eight sections of sulphur
Change temperature are as follows: 245 DEG C, 300 DEG C, 285 DEG C, 275 DEG C, 265 DEG C, 255 DEG C, 240 DEG C, 220 DEG C.
The length of every section of vulcanization of eight sections of vulcanizations is 4m.
The back segment nitrogen is cooling in such a way that injection nitrogen is cooling, and nitrogen temperature used is 25-35 DEG C, back segment nitrogen
The length of air cooling is 58-62 meters.
It is nitrogen protection atmosphere in vulcanization, conductor back segment heating process.
The beneficial effects of the present invention are: high-tension electricity electricity can be improved to greatest extent in the case where guaranteeing product quality
The speed of production of the crosslinked polyetylene insulated core of cable shortens the delivery cycle.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be further explained in detail.
In the present invention, if not refering in particular to, used raw material and equipment etc. are commercially available or commonly used in the art.
Method in following embodiments is unless otherwise instructed the conventional method of this field.
Embodiment:
It is produced using CCV technique, conductor shielding material, insulation shielding material and Insulation Material are all made of commercially available import material.Conductor buying is high
Rounding conductor solves influence of the conductor to core shift from source, lays the foundation for high-speed production.
A kind of high speed production process of 64/110kV power-frequency electromagnetic fields, including conductor leading portion add
Heat, conductor insulation package, the cooling of leading portion nitrogen, vulcanization, conductor back segment heats, back segment nitrogen is cooling, cable torsion and take-up walk
Suddenly, the degree of cross linking that NCC is crosslinked software for calculation is set as 98.7%.Cable torsion and take-up are routine operation.
The conductor insulation package is wrapped up the conductor after leading portion heating, by conductor shielding material extruder, insulation
Shielding material extruder, the common low temperature of Insulation Material extruder squeeze out, and for the temperature that low temperature squeezes out at 128-132 DEG C, the present embodiment is preferred
130 DEG C, the package for being followed successively by conductor shielding, insulation, insulation shielding from the inside to the outside is formed to conductor.
The leading portion nitrogen is cooling in such a way that injection nitrogen is cooling, and nitrogen temperature used is 30-40 DEG C, this implementation
Preferably 35 DEG C of example, the cooling total length of leading portion nitrogen is in 4-4.5m, and preferably 4 meters of the present embodiment.
The back segment nitrogen is cooling in such a way that injection nitrogen is cooling, and nitrogen temperature used is 25-35 DEG C, this implementation
Preferably 30 DEG C of example, the cooling length of back segment nitrogen are 58-62 meters, preferably 60 meters of the present embodiment.
It is nitrogen protection atmosphere in vulcanization, conductor back segment heating process, vulcanization vulcanizes every section using eight sections of vulcanizations, eight sections
The length of vulcanization is 4m.
Conductor leading portion, back segment heating temperature, curing temperature, the specific of speed of production are arranged referring to table 1.
Table 1
The performance detection of cable such as table 2:
Table 2
Using identical raw material, technique of the invention has relative to existing technique speed of production to be obviously improved, simultaneously
In turn ensure the quality of cable, core shift, permanent relaxation shrinkage and insulation, which are heat-shrinked, is all substantially better than VCV production line, insulating inner
Stress also greatly reduces, and the service life of high voltage power cable is guaranteed.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (8)
1. a kind of high speed production process of 64/110kV power-frequency electromagnetic fields, it is characterised in that: including leading
The heating of body leading portion, conductor insulation package, leading portion nitrogen is cooling, vulcanization, conductor back segment heats, back segment nitrogen is cooling, cable torsion
And take-up step, conductor leading portion are heated to increasing conductor temperature by 50-60 DEG C, conductor back segment is heated to increasing conductor temperature
50-60 DEG C, the degree of cross linking of crosslinked polyethylene is set as 98.7%, and the linear velocity of cable production is 1.46-2.00m/min.
2. the high speed production process of 64/110kV power-frequency electromagnetic fields according to claim 1,
Be characterized in that: the conductor insulation package is wrapped up the conductor after leading portion heating, by conductor shielding material extruder, insulation
The common low temperature of shielding material extruder, Insulation Material extruder squeezes out, to conductor formation be followed successively by from the inside to the outside conductor shielding, insulation,
The package of insulation shielding.
3. the high speed production process of 64/110kV power-frequency electromagnetic fields according to claim 2,
Be characterized in that: the temperature that low temperature squeezes out is at 128-132 DEG C.
4. the high speed production process of 64/110kV power-frequency electromagnetic fields according to claim 1,
Be characterized in that: the leading portion nitrogen is cooling in such a way that injection nitrogen is cooling, and nitrogen temperature used is 30-40 DEG C, leading portion
The cooling total length of nitrogen is in 4-4.5m.
5. the high speed production process of 64/110kV power-frequency electromagnetic fields according to claim 1,
Be characterized in that: the vulcanization is using eight sections of vulcanizations, specifications and models 400mm2Cable eight sections of curing temperatures are as follows: 245 DEG C, 305
DEG C, 275 DEG C, 265 DEG C, 255 DEG C, 255 DEG C, 245 DEG C, 220 DEG C；Specifications and models 630mm2Cable eight sections of curing temperatures are as follows:
245 DEG C, 295 DEG C, 285 DEG C, 280 DEG C, 275 DEG C, 255 DEG C, 250 DEG C, 220 DEG C；Specifications and models 1200mm2Cable eight sections of sulphur
Change temperature are as follows: 245 DEG C, 300 DEG C, 285 DEG C, 275 DEG C, 265 DEG C, 255 DEG C, 240 DEG C, 220 DEG C.
6. the high speed production process of 64/110kV power-frequency electromagnetic fields according to claim 1,
Be characterized in that: the length of every section of vulcanization of eight sections of vulcanizations is 4m.
7. the high speed production process of 64/110kV power-frequency electromagnetic fields according to claim 1,
Be characterized in that: the back segment nitrogen is cooling in such a way that injection nitrogen is cooling, and nitrogen temperature used is 25-35 DEG C, back segment
The cooling length of nitrogen is 58-62 meters.
8. the high speed production process of 64/110kV power-frequency electromagnetic fields according to claim 1,
It is characterized in that: being nitrogen protection atmosphere in vulcanization, conductor back segment heating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811619899.XA CN109616262B (en) | 2018-12-28 | 2018-12-28 | High-speed production process of 64/110kV high-voltage cross-linked polyethylene insulated power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811619899.XA CN109616262B (en) | 2018-12-28 | 2018-12-28 | High-speed production process of 64/110kV high-voltage cross-linked polyethylene insulated power cable |
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| Publication Number | Publication Date |
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| CN109616262A true CN109616262A (en) | 2019-04-12 |
| CN109616262B CN109616262B (en) | 2019-12-13 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11195336A (en) * | 1998-01-05 | 1999-07-21 | Furukawa Electric Co Ltd:The | Vertical continuously cross-linking device of cross-linked insulated cable |
| CN103903815A (en) * | 2012-12-28 | 2014-07-02 | 青岛汉缆股份有限公司 | Apparatus and manufacturing method for manufacturing crosslinking PE cable insulation core |
| CN104979051A (en) * | 2015-06-03 | 2015-10-14 | 浙江万马股份有限公司 | 66-500kV crosslinked cable short-degassing online treatment process |
| CN106448838A (en) * | 2016-08-27 | 2017-02-22 | 昆明电立电缆有限公司 | Long-life and high-insulation cable and manufacturing method thereof |
-
2018
- 2018-12-28 CN CN201811619899.XA patent/CN109616262B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11195336A (en) * | 1998-01-05 | 1999-07-21 | Furukawa Electric Co Ltd:The | Vertical continuously cross-linking device of cross-linked insulated cable |
| CN103903815A (en) * | 2012-12-28 | 2014-07-02 | 青岛汉缆股份有限公司 | Apparatus and manufacturing method for manufacturing crosslinking PE cable insulation core |
| CN104979051A (en) * | 2015-06-03 | 2015-10-14 | 浙江万马股份有限公司 | 66-500kV crosslinked cable short-degassing online treatment process |
| CN106448838A (en) * | 2016-08-27 | 2017-02-22 | 昆明电立电缆有限公司 | Long-life and high-insulation cable and manufacturing method thereof |
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| CN109616262B (en) | 2019-12-13 |
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