CN104036881B - The manufacture method of crosslinked polyethylene insulated aerial cable - Google Patents
The manufacture method of crosslinked polyethylene insulated aerial cable Download PDFInfo
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- CN104036881B CN104036881B CN201410277577.7A CN201410277577A CN104036881B CN 104036881 B CN104036881 B CN 104036881B CN 201410277577 A CN201410277577 A CN 201410277577A CN 104036881 B CN104036881 B CN 104036881B
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Abstract
The present invention relates to a kind of manufacture method of crosslinked polyethylene insulated aerial cable, three-layer co-extruded device fabrication line without the need to changing catenary suspension type continuous vulcanization dry cross-linking unit can be produced, step is as follows: (1) arranges extruder temperature (2) startup feeding (3) and carries out discharge to insulation semiconductive shielding layer extruder, when material is discharged to the half that extruder head insulation shielding extruder divides the bed of material, stop discharge, body temperature to 60 ~ 70 DEG C (4) of the semiconductive shielding layer of reduction insulation simultaneously extruder are carried out discharge (5) to crosslinked polyetylene insulated layer extruder and are carried out discharge (6) adjustment core shift to conductor shield extruder, produce.Conductor semiconductive shielding layer and the crosslinked polyetylene insulated layer of manufacture method of the present invention are once extruded, prevent conductor semiconductive shielding layer and crosslinked polyetylene insulated interlayer contact not tight and produce air gap, improve cable incipient discharge voltage, overcome head when adopting original production line to produce and shield the defect that backflow easily appears in Insulation Material in point bed of material outward.
Description
Technical field
The present invention relates to a kind of manufacture method of crosslinked polyethylene insulated aerial cable, be specifically related to adopt catenary suspension type continuous vulcanization dry cross-linking unit to manufacture the manufacture method of crosslinked polyethylene insulated aerial cable, belong to technical field of cable.
Background technology
Insulating frame ceases to be busy substitutes plain conductor in 10KV distribution network transform application two during the last ten years, and its advantage is significant, and along with the raising of distribution overhead line insulation rate, the power supply reliability of distribution line improves constantly, and the failure rate of circuit declines; Efficiently solve the tree line contradiction in urban afforestation, beautify urban look; Improve the utilance of line channel; Prevent the filthy direct impact on wire of environment; And there is good Social benefit and economic benefit.
Current domestic catenary suspension type continuous vulcanization dry cross-linking unit major part is the three-layer co-extruded equipment of conductor shield+insulating barrier+insulation screen, and crosslinked polyethylene insulated aerial cable is conductor shield and insulating barrier, therefore in the discharging runner of head, insulation shielding layered material has just been lacked, make between insulating barrier and insulation screen, to have occurred space, when production frame ceases to be busy, due to the reason of extrusion molding pressure and nitrogen pressure, the head being easy to cause Insulation Material to reflux enter insulation screen shields in point bed of material outward, produce buildup, not flowing for a long time, it is hardening to plastify, form burnt material, when extruding, can go out along with insulating barrier material strip, cause stiff block at cable surface and affect product quality.As added Insulation Material and insulation extrusion machine is together extruded in insulation screen extruder, although can avoid this problem, insulation thickness is difficult to control, simultaneously can because of two-layer insulating exruded temperature, pressure difference, cause lamination, affect product quality equally.
Summary of the invention
The problem that the crosslinked polyethylene insulated aerial cable that the object of the invention is the three-layer co-extruded device fabrication line manufacture bilayer in order to solve above-mentioned employing existing catenary suspension type continuous vulcanization dry cross-linking unit easily causes, provides the simple preparation method of a kind of method of operation.
The following technical scheme that the present invention adopts: a kind of manufacture method of crosslinked polyethylene insulated aerial cable, adopt the three-layer co-extruded device fabrication line of catenary suspension type continuous vulcanization dry cross-linking unit to produce, step is as follows:
(1) stop after conductor semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and insulation semiconductive shielding layer extruder being warming up to design temperature, insulation 110min ~ 130min;
Conductor semiconductive shielding layer extruder fuselage design temperature: 1st district: 70 DEG C ~ 90 DEG C, 2nd district: 80 DEG C ~ 90 DEG C, 3rd district: 85 DEG C ~ 95 DEG C, 4th district: 90 DEG C ~ 100 DEG C;
Crosslinked polyetylene insulated floor extruder fuselage design temperature: 1st district: 80 DEG C ~ 100 DEG C, 2nd district: 110 DEG C ~ 120 DEG C, 3rd district: 110 DEG C ~ 120 DEG C, 4th district: 110 DEG C ~ 120 DEG C;
The fuselage design temperature of insulation semiconductive shielding layer extruder: 1st district: 60 DEG C ~ 80 DEG C, 2nd district: 80 DEG C ~ 90 DEG C, 3rd district: 85 DEG C ~ 95 DEG C, 4th district: 90 DEG C ~ 100 DEG C;
Conductor semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and insulation semiconductive shielding layer extruder share an extruder head, extruder head design temperature is: 1st district: 90 DEG C ~ 100 DEG C, 2nd district: 105 DEG C ~ 115 DEG C, 3rd district: 105 DEG C ~ 115 DEG C, 4th district: 105 DEG C ~ 115 DEG C, 5th district: 105 DEG C ~ 115 DEG C;
(2) insulation semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and conductor semiconductive shielding layer extruder is started respectively with the speed of a motor vehicle of 4.0 ~ 8.0m/min, insulation semiconductive shielding layer extruder screw speed setting is 20 ~ 25r/min, often turns gel quantity 8.5 ~ 8.8kg/rmp; Crosslinked polyetylene insulated layer extruder screw speed setting is 25 ~ 30r/min, often turns gel quantity 8.8 ~ 9.0kg/rmp; Conductor semiconductive shielding layer extruder screw speed setting is 25 ~ 30r/min, often turns gel quantity 8.8 ~ 9.0kg/rmp and starts to carry out feeding;
(3) carry out discharge to insulation semiconductive shielding layer extruder, the discharge time is 5 ~ 10min, when material is discharged to the half that head shields point bed of material outward, stops discharge, reduces body temperature to 60 ~ 70 DEG C of the semiconductive shielding layer extruder that insulate simultaneously;
(4) carry out discharge to crosslinked polyetylene insulated layer extruder, the discharge time is 3 ~ 5min;
(5) carry out discharge to conductor semiconductive shielding layer extruder, the discharge time is 3 ~ 5min.
(6) when conductor semiconductive shielding layer and cross-linked polyethylene insulating material simultaneously discharge to adjustment core shift during the die sleeve mouth of extruder head, by Eccentricity control 5% ~ 8%.
Advantage of the present invention is: 1, adopt the crosslinked polyethylene insulated aerial cable that the method manufactures, core surface adopts conductor semiconductive shielding layer can the effect of uniform line wicking surface electric field, conductor semiconductive shielding layer and crosslinked polyetylene insulated layer are once extruded, prevent conductor semiconductive shielding layer and crosslinked polyetylene insulated interlayer contact not tight and produce air gap, prevent cross-linked polyethylene insulating material from shielding a point bed of material outward at head and occur backflow situation, improve cable incipient discharge voltage.2, the three-layer co-extruded device fabrication line of Appropriate application original catenary suspension type continuous vulcanization dry cross-linking unit, improves the utilance of unit, saves cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the three-layer co-extruded device fabrication line of catenary suspension type continuous vulcanization dry cross-linking unit in the present invention.
Reference numeral: conductor 1, conductor semiconductive shielding layer extruder 2, crosslinked polyetylene insulated layer extruder 3, insulation semiconductive shielding layer extruder 4, extruder head 5.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
As shown in Figure 1, adopt the three-layer co-extruded device fabrication crosslinked polyethylene insulated aerial cable of catenary suspension type continuous vulcanization dry cross-linking unit, this cable is by conductor, conductor semiconductive shielding layer, crosslinked polyetylene insulated layer is formed, three-layer co-extruded equipment comprises the extruder 2 for extruding conductor semiconductive shielding layer, for extruding the extruder 3 of crosslinked polyetylene insulated layer and the extruder 4 for extruding insulation semiconductive shielding layer, three extruders share an extruder head 5, be coated on the semiconductive shielding layer outside conductor 1 and the shared runner of crosslinked polyetylene insulated layer different material, in flow process, extruding force increases gradually, semiconductive shielding layer and two layers, crosslinked polyetylene insulated layer are extruded jointly, air gap can not be produced between each layer.
embodiment one:
A manufacture method for crosslinked polyethylene insulated aerial cable, its step is as follows:
(1) stop after conductor semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and insulation semiconductive shielding layer extruder being warming up to design temperature, insulation 110min;
Conductor semiconductive shielding layer extruder fuselage design temperature: 1st district: 70 DEG C, 2nd district: 80 DEG C, 3rd district: 85 DEG C, 4th district: 90 DEG C;
Crosslinked polyetylene insulated floor extruder fuselage design temperature: 1st district: 80 DEG C, 2nd district: 110 DEG C, 3rd district: 110 DEG C, 4th district: 110 DEG C;
The fuselage design temperature of insulation semiconductive shielding layer extruder: 1st district: 60 DEG C, 2nd district: 80 DEG C, 3rd district: 85 DEG C, 4th district: 90 DEG C;
Three public extruder heads of extruder, head design temperature is: 1st district: 90 DEG C, 2nd district: 105 DEG C, 3rd district: 105 DEG C, 4th district: 105 DEG C, 5th district: 105 DEG C
(2) insulation semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder 3 and conductor semiconductive shielding layer extruder is started respectively with the speed of a motor vehicle of 5.0m/min, insulation semiconductive shielding layer extruder screw speed setting is 20r/min, often turns gel quantity 8.5kg/rmp; Crosslinked polyetylene insulated layer extruder screw speed setting is 25r/min, often turns gel quantity 8.8kg/rmp; Conductor semiconductive shielding layer extruder screw speed setting is 25r/min, starts to carry out feeding after often turning gel quantity 8.8kg/rmp.
(3) discharge 5min is carried out to insulation semiconductive shielding layer extruder, when material is discharged to the half that head shields point bed of material outward, stops discharge, reduce the body temperature to 60 DEG C of the semiconductive shielding layer extruder that insulate simultaneously;
(4) discharge 3min is carried out to crosslinked polyetylene insulated layer extruder;
(5) discharge 3min. is carried out to conductor semiconductive shielding layer extruder
(6) adjust core shift when conductor insulation semi-conductive screen layered material and crosslinked polyetylene insulated layered material go out when three extruders share the die sleeve mouth of a head simultaneously, Eccentricity control is produced after 6%.
Due to insulation semiconductive shielding layer and and crosslinked polyetylene insulated layer between create one section of vacuum range, create certain air pressure, due to the effect of inner and outer air pressure, making the material of crosslinked polyetylene insulated layer can not be back to head again shields in point bed of material outward, adopt this kind of method that conductor insulation semiconductive shielding layer and crosslinked polyetylene insulated layer both can have been made once to extrude, and between layer, tight produce.
embodiment two
A manufacture method for crosslinked polyethylene insulated aerial cable, adopt the three-layer co-extruded device fabrication line of catenary suspension type continuous vulcanization dry cross-linking unit to produce, step is as follows:
(1) stop after conductor semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and insulation semiconductive shielding layer extruder being warming up to design temperature, insulation 120min;
Conductor semiconductive shielding layer extruder fuselage design temperature: 1st district: 80 DEG C, 2nd district: 85 DEG C, 3rd district: 90 DEG C, 4th district: 95 DEG C;
Crosslinked polyetylene insulated floor extruder fuselage design temperature: 1st district: 90 DEG C, 2nd district: 115 DEG C, 3rd district: 115 DEG C, 4th district: 115 DEG C;
The fuselage design temperature of insulation semiconductive shielding layer extruder: 1st district: 70 DEG C, 2nd district: 85 DEG C, 3rd district: 90 DEG C, 4th district: 95 DEG C;
Conductor semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and insulation semiconductive shielding layer extruder share an extruder head, and head design temperature is: 1st district: 95 DEG C, 2nd district: 110 DEG C, 3rd district: 110 DEG C, 4th district: 110 DEG C, 5th district: 110 DEG C;
(2) insulation semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and conductor semiconductive shielding layer extruder is started respectively with the speed of a motor vehicle of 7.5m/min, insulation semiconductive shielding layer extruder screw speed setting is 22r/min, often turns gel quantity 8.6kg/rmp; Crosslinked polyetylene insulated layer extruder screw speed setting is 28r/min, often turns gel quantity 8.9kg/rmp; Conductor semiconductive shielding layer extruder screw speed setting is 28r/min, often turns gel quantity 8.9kg/rmp and starts to carry out feeding;
(3) carry out discharge to insulation semiconductive shielding layer extruder, the discharge time is 8min, when material is discharged to the half that head shields point bed of material outward, stops discharge, reduces the body temperature to 65 DEG C of the semiconductive shielding layer extruder that insulate simultaneously;
(4) carry out discharge to crosslinked polyetylene insulated layer extruder, the discharge time is 4min;
(5) carry out discharge to conductor semiconductive shielding layer extruder, the discharge time is 4min.
(6) when conductor semiconductive shielding layer and cross-linked polyethylene insulating material simultaneously discharge to adjustment core shift during the die sleeve mouth of head, Eccentricity control is produced after 6%.
Due to insulation semiconductive shielding layer and and crosslinked polyetylene insulated layer between create one section of vacuum range, create certain air pressure, due to the effect of inner and outer air pressure, make the material of crosslinked polyetylene insulated layer can not be back to head again and shield a point bed of material outward, adopt this kind of method that conductor insulation semiconductive shielding layer and crosslinked polyetylene insulated layer both can have been made once to extrude, between each layer, tight produces.
embodiment three:
(1) stop after conductor semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and insulation semiconductive shielding layer extruder being warming up to design temperature, insulation 130min;
Conductor semiconductive shielding layer extruder fuselage design temperature: 1st district: 90 DEG C, 2nd district: 90 DEG C, 3rd district: 95 DEG C, 4th district: 100 DEG C;
Crosslinked polyetylene insulated floor extruder fuselage design temperature: 1st district: 100 DEG C, 2nd district: 120 DEG C, 3rd district: 120 DEG C, 4th district: 120 DEG C;
The fuselage design temperature of insulation semiconductive shielding layer extruder: 1st district: 80 DEG C, 2nd district: 90 DEG C, 3rd district: 95 DEG C, 4th district: 100 DEG C;
Three public extruder heads of extruder, head design temperature is: 1st district: 100 DEG C, 2nd district: 115 DEG C, 3rd district: 115 DEG C, 4th district: 115 DEG C, 5th district: 115 DEG C
(2) insulation semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and conductor semiconductive shielding layer extruder is started respectively with the speed of a motor vehicle of 8m/min, insulation semiconductive shielding layer extruder screw speed setting is 25r/min, often turns gel quantity 8.8kg/rmp; Crosslinked polyetylene insulated layer extruder screw speed setting is 30r/min, often turns gel quantity 9.0kg/rmp; Conductor semiconductive shielding layer extruder screw speed setting is 30r/min, often turns gel quantity 9.0kg/rmp; Start to carry out feeding.
(3) discharge 10min is carried out to insulation semiconductive shielding layer extruder, when material is discharged to the half that head shields point bed of material outward, stops discharge, reduce the body temperature to 70 DEG C of the semiconductive shielding layer extruder that insulate simultaneously;
(4) discharge 5min is carried out to crosslinked polyetylene insulated layer extruder;
(5) discharge 5min. is carried out to conductor semiconductive shielding layer extruder
(6) adjust core shift when conductor insulation semi-conductive screen layered material and crosslinked polyetylene insulated layered material go out when three extruders share the die sleeve mouth of a head simultaneously, Eccentricity control is produced after 8%.
Due to insulation semiconductive shielding layer and and crosslinked polyetylene insulated layer between create one section of vacuum range, create certain air pressure, due to the effect of inner and outer air pressure, make the material of crosslinked polyetylene insulated layer can not be back to head again and shield a point bed of material outward, adopt this kind of method that conductor insulation semiconductive shielding layer and crosslinked polyetylene insulated layer both can have been made once to extrude, between each layer, tight produces.
Claims (1)
1. a manufacture method for crosslinked polyethylene insulated aerial cable, is characterized in that: adopt the three-layer co-extruded device fabrication line of catenary suspension type continuous vulcanization dry cross-linking unit to produce, step is as follows:
(1) stop after conductor semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and insulation semiconductive shielding layer extruder being warming up to design temperature, insulation 110min ~ 130min;
Conductor semiconductive shielding layer extruder fuselage design temperature: 1st district: 70 DEG C ~ 90 DEG C, 2nd district: 80 DEG C ~ 90 DEG C, 3rd district: 85 DEG C ~ 95 DEG C, 4th district: 90 DEG C ~ 100 DEG C;
Crosslinked polyetylene insulated floor extruder fuselage design temperature: 1st district: 80 DEG C ~ 100 DEG C, 2nd district: 110 DEG C ~ 120 DEG C, 3rd district: 110 DEG C ~ 120 DEG C, 4th district: 110 DEG C ~ 120 DEG C;
The fuselage design temperature of insulation semiconductive shielding layer extruder: 1st district: 60 DEG C ~ 80 DEG C, 2nd district: 80 DEG C ~ 90 DEG C, 3rd district: 85 DEG C ~ 95 DEG C, 4th district: 90 DEG C ~ 100 DEG C;
Conductor semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and insulation semiconductive shielding layer extruder share an extruder head, extruder head design temperature is: 1st district: 90 DEG C ~ 100 DEG C, 2nd district: 105 DEG C ~ 115 DEG C, 3rd district: 105 DEG C ~ 115 DEG C, 4th district: 105 DEG C ~ 115 DEG C, 5th district: 105 DEG C ~ 115 DEG C;
(2) insulation semiconductive shielding layer extruder, crosslinked polyetylene insulated layer extruder and conductor semiconductive shielding layer extruder is started with the speed of a motor vehicle of 4.0 ~ 8.0m/min, insulation semiconductive shielding layer extruder screw speed setting is 20 ~ 25r/min, often turns gel quantity 8.5 ~ 8.8kg/rmp; Crosslinked polyetylene insulated layer extruder screw speed setting is 25 ~ 30r/min, often turns gel quantity 8.8 ~ 9.0kg/rmp; Conductor semiconductive shielding layer extruder screw speed setting is 25 ~ 30r/min, often turns gel quantity 8.8 ~ 9.0kg/rmp and starts to carry out feeding;
(3) carry out discharge to insulation semiconductive shielding layer extruder, the discharge time is 5 ~ 10min, when material is discharged to the half that head shields point bed of material outward, stops discharge, reduces temperature all to 60 ~ 70 DEG C, 4 districts of the fuselage of the semiconductive shielding layer extruder that insulate simultaneously;
(4) carry out discharge to crosslinked polyetylene insulated layer extruder, the discharge time is 3 ~ 5min;
(5) carry out discharge to conductor semiconductive shielding layer extruder, the discharge time is 3 ~ 5min;
(6) when the material of conductor semiconductive shielding layer and crosslinked polyetylene insulated layer material simultaneously discharge to adjustment core shift during the die sleeve mouth of extruder head, by Eccentricity control 5% ~ 8%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277577.7A CN104036881B (en) | 2014-06-19 | 2014-06-19 | The manufacture method of crosslinked polyethylene insulated aerial cable |
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| CN201410277577.7A CN104036881B (en) | 2014-06-19 | 2014-06-19 | The manufacture method of crosslinked polyethylene insulated aerial cable |
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| CN104036881B true CN104036881B (en) | 2016-03-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105551691B (en) * | 2015-12-17 | 2017-05-03 | 浙江五丰电缆有限公司 | Cable extrusion technology |
| CN114613532A (en) * | 2022-04-25 | 2022-06-10 | 远东电缆有限公司 | Oil-resistant cold-resistant flexible cable and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976290Y (en) * | 2006-09-22 | 2007-11-14 | 上海亚龙工业（集团）有限公司 | Cable for magnetic levitation |
| CN202736596U (en) * | 2012-08-23 | 2013-02-13 | 安徽普瑞斯塑料机械制造有限公司 | Three-layer co-extrusion warm water crosslinking production line |
| CN202895651U (en) * | 2012-08-29 | 2013-04-24 | 通辽市津蒙线缆制造有限公司 | Three-layer coextruding horizontal cable producing equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06349361A (en) * | 1993-06-14 | 1994-12-22 | Fujikura Ltd | Manufacture of cv cable |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976290Y (en) * | 2006-09-22 | 2007-11-14 | 上海亚龙工业（集团）有限公司 | Cable for magnetic levitation |
| CN202736596U (en) * | 2012-08-23 | 2013-02-13 | 安徽普瑞斯塑料机械制造有限公司 | Three-layer co-extrusion warm water crosslinking production line |
| CN202895651U (en) * | 2012-08-29 | 2013-04-24 | 通辽市津蒙线缆制造有限公司 | Three-layer coextruding horizontal cable producing equipment |
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