CN108091433B - Processing method of high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable - Google Patents
Processing method of high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable Download PDFInfo
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- CN108091433B CN108091433B CN201711318190.1A CN201711318190A CN108091433B CN 108091433 B CN108091433 B CN 108091433B CN 201711318190 A CN201711318190 A CN 201711318190A CN 108091433 B CN108091433 B CN 108091433B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/221—Longitudinally placed metal wires or tapes
- H01B7/225—Longitudinally placed metal wires or tapes forming part of an outer sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/26—Reduction of losses in sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention discloses a processing method of a high-pressure corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, which comprises the steps of selecting a polyethylene outer sheath material with low melting index, narrower molecular weight distribution and uniform granulation, and obtaining an ideal product by means of drying, designing a pressure balancing device at a pressed part of a high-pressure corrugated metal sleeve, uniformly applying heat to the corrugated metal sleeve by a tubular soaking device, coating asphalt, adjusting the outlet temperature of an extruder, arranging a flow distribution channel of a double-layer co-extruder head, cooling in sections and the like. The weather resistance is good, and the internal stress of the sheathing material is small; the appearance is excellent and more round, and the outer conducting layer is uniform and is not easy to scratch; the production cost is reduced: the surface hardness is high, mechanical damage in the production and laying processes is reduced to a certain degree, rat bite and termite bite can be effectively prevented, and the coating has the advantages of safety, sanitation, no toxicity, environmental protection and the like.
Description
Technical Field
The invention relates to a cable manufacturing technology, in particular to a processing method of a power cable with a high-voltage corrugated metal sleeve and a low-eccentricity polyethylene outer sheath.
Background
The power cable has rich composite structures and different designs according to different characteristic requirements, for example, a high-voltage power transmission cable designed with the patent publication number of CN104299716B comprises 3 conductors, a conductor shielding layer, an insulating layer and a protective layer; the conductor shielding layer is arranged outside the conductor, the insulating layer is arranged outside the conductor shielding layer, and 3 conductors are arranged in the protective layer; the device also comprises a cylindrical fixing device, and the cylindrical fixing device is positioned in the protective layer; 3 circular arc grooves are arranged on the side surface of the cylindrical fixing device at equal intervals; the 3 conductors are respectively positioned in the arc-shaped grooves; insulating filler is filled in a cavity formed among the conductor, the cylindrical fixing device and the protective layer; the system also comprises a far-end breakpoint detection unit and N terminal breakpoint detection units; the N terminal breakpoint detection units are arranged on the high-voltage transmission power cable line at equal intervals; n is more than or equal to 2. This construction avoids the problem of short circuits caused by friction of the power cables. However, the basic process of the general cable production method is the same as the basic process, and for example, a low-voltage power cable production method designed in patent publication No. CN106205865A includes a conductor process: forming a conductor of the insulated wire core and a conductor of the control wire core; an insulation process: wrapping a polyethylene insulating layer on the surface of a conductor of the insulated wire core, combining a plurality of insulated wire cores, wrapping a polyester film wrapping tape layer and a tinned copper wire shielding layer on the outer side of the combined insulated wire core to form an insulated wire core group, and wrapping a polyethylene insulating layer on the surface of a conductor of the control wire core; cabling process; an inner sheath procedure; an armoring process; an outer sheath process and the like.
The high-voltage power cable is characterized by large transmission capacity, long service life and the like as a main road of power transmission. The outer sheath is used as an important component of the high-voltage power cable, and has the functions of isolating the induced voltage in the operation of the high-voltage power cable and the impulse voltage during system failure and ensuring the safety of various objects around. Polyethylene, as one of the main raw materials of the outer sheath of the high-voltage power cable, has already occupied a major share of the cable sheath market by virtue of its excellent electrical, mechanical and processing properties. How to reasonably utilize the polyethylene sheath material and make high-voltage power cable products is a major topic in the whole cable manufacturing industry. The low eccentricity of the high-pressure corrugated metal sleeve polyethylene outer sheath is an important assessment item for the appearance quality of the product.
Disclosure of Invention
The invention aims to solve the problem that a common high-pressure corrugated metal sleeve polyethylene outer sheath is seriously eccentric, and provides a processing method of a high-pressure corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable.
The technical problem of the invention is mainly solved by the following technical scheme: a processing method of a high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable is characterized in that a cable body structure comprises the following parts: the low-resistance conductor is positioned in the core, a wrapped semi-conductive nylon belt is arranged outside the low-resistance conductor, a super-clean XLPE insulating layer (4) is arranged outside the wrapped semi-conductive nylon belt, and a high-voltage corrugated metal sleeve is arranged outside the super-clean XLPE insulating layer after passing through an insulating buffer layer; the outer part of the high-pressure corrugated metal sleeve is provided with a low-eccentricity polyethylene outer sheath after passing through a cable asphalt layer; the outermost surface layer is provided with a conductive layer.
The cable processing method comprises the following steps:
on the basis of ensuring that the electrical property is unchanged, the polyethylene outer sheath material is designed to have low melting index, narrower molecular weight distribution and uniform granulation.
(II) drying the raw materials: before and during production, the polyethylene outer sheath material is dried.
And thirdly, designing a pressure equalizing device at the pressed part of the high-pressure corrugated metal sleeve.
And (IV) uniformly heating the high-pressure corrugated metal sleeve by using a tubular soaking device, and uniformly coating asphalt.
And (V) adjusting the outlet temperature of the extruder.
Sixthly, a double-layer co-extrusion machine head is adopted, and a sub-runner is arranged; and a semi-extrusion die is arranged.
(VII) cooling in sections: the temperature of the first-stage cooling water is 59-61 ℃; the cooling water in the water tank at the rest section is 20 ℃.
In the processing method of the high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, preferably, the insulation buffer layer comprises a super-smooth insulation shielding layer tightly attached to a super-clean XLPE insulation layer, and a semi-conductive buffer water-blocking tape located outside the super-smooth insulation shielding layer.
In the processing method of the high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, preferably, the polyethylene outer sheath is wrapped on the surface of the corrugated metal sleeve uniformly coated with the cable asphalt layer, and the corrugated metal sleeve, the polyethylene outer sheath and the low-resistance conductor are concentrically arranged.
In the processing method of the high-pressure corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, preferably, the raw material drying is to spread the raw material on a grid conveyor belt and continuously blow the raw material from the lower part of the conveyor belt by cool breeze at 20-30 ℃.
In the processing method of the high-pressure corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, preferably, the pressure equalizing device is provided with a mechanism for continuously correcting the high-pressure corrugated metal sleeve in a whole circle, and the mechanism for continuously correcting the whole circle is provided with an air pressure deviation correcting push mold with a plurality of point positions along the whole circle on the same cross section. Before the pneumatic deviation rectifying and die pushing work, the roundness of the high-pressure corrugated metal sleeve is automatically detected, and then a detected data signal is transmitted to a pneumatic control system. The pneumatic deviation rectifying push mold is a rolling type push mold. The rolling type push mold can correct the deviation under the condition that the high-pressure corrugated metal sleeve moves.
In the processing method of the high-pressure corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, preferably, the rounding continuous correction mechanism is continuously provided with a plurality of throttle pressure deviation correction pushing modules along the traveling direction of the high-pressure corrugated metal sleeve. The roundness of the high-pressure corrugated metal sleeve is completely ensured through continuous correction of a certain length.
In the processing method of the high-pressure corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, preferably, the tubular soaking device comprises a shell, a soaking pipe is arranged in the shell, heated small holes are distributed on the pipe wall of the soaking pipe, and a spiral annular air injection heat source channel is arranged outside the soaking pipe.
In the processing method of the high-pressure corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, preferably, the screw of the sheath material extruder is an equal-depth unequal-distance screw with a diversion trench. The production efficiency is improved on the premise of ensuring complete plasticization.
In the processing method of the high-pressure corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable, preferably, the outlet temperature of the extruder is less than the melting temperature of polyethylene and is 2-3 ℃. And the control of high roundness is facilitated.
The high-voltage corrugated metal sleeve bears the effects of short-circuit current of the cable, radial water resistance and lateral pressure resistance. The technical scheme starts from the guarantee of the concentricity of the high-pressure corrugated metal sleeve, the polyethylene outer sheath is wrapped on the surface of the corrugated metal sleeve uniformly coated with the asphalt layer, and the concentricity of the corrugated metal sleeve greatly affects the eccentricity of the polyethylene sheath, so that the elongation and the tensile strength of the metal sleeve are optimized. The polyethylene outer sheath material is required to have lower melt index, narrower molecular weight distribution and uniform granulation on the basis of ensuring that the electrical property is unchanged. In the process of matching the product, the polyethylene sheath material is a hydrophobic material and is not easy to be damped, but the material is mixed with an additive and a modifier which are easy to be damped, so that the sheath material is dried before and during production; furthermore, a specially designed full-circle continuous correction mechanism is introduced to the place where the high-pressure corrugated metal sleeve is easy to be flattened for pressure correction, a multi-point air pressure correction pushing die is arranged on the same cross section along the whole circumference, and a plurality of sections of air pressure correction pushing die sets are continuously arranged along the traveling direction of the high-pressure corrugated metal sleeve, so that the high-pressure corrugated metal sleeve is ensured to obtain a correction circle in the whole moving process. The scheme designs the sectional cooling, reduces the self stress to the greatest extent, ensures that the cable is completely cooled when being dragged by winding, and cannot influence the eccentricity of the polyethylene outer sheath due to the winding traction and the disc loading amount. The scheme has 10 functional layers from the low-resistance conductor of the core part to the outermost conductive layer, and the functional layers are tightly matched one by one, so that an ideal product is realized.
The invention has the beneficial effects that: the weather resistance is good, and the internal stress of the sheathing material is small; the appearance is excellent and more round, the outer conducting layer is uniform and is not easy to scratch, and the safety is guaranteed; raw materials are saved, and the production cost is reduced: the surface hardness is high, the polyethylene sheath material can cause the sheath hardness to be high due to the low melt index, mechanical damage in the production and laying processes is reduced to a certain degree, rat bite and termite bite can be effectively prevented, and the polyethylene sheath material has the advantages of safety, sanitation, no toxicity, environmental protection and the like.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
In the figure: 1. a low resistance conductor; 2. wrapping a semi-conductive nylon belt; 3. an ultra-smooth semi-conductive layer; 4. an ultra-clean XLPE insulating layer; 5. ultra-smooth insulation shielding; 6. a semiconductive buffer water-blocking tape; 7. a corrugated metal sleeve; 8. cable asphalt; 9. a low eccentricity polyethylene outer sheath; 10. and a conductive layer.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
In the embodiment of the present invention, as shown in fig. 1, a method for processing a power cable with a high-voltage corrugated metal sheath and a low-eccentricity polyethylene outer sheath includes: the low-resistance conductor 1 is positioned in the core, a wrapped semi-conductive nylon belt 2 is arranged outside the low-resistance conductor, a super-clean XLPE insulating layer 4 is arranged outside the wrapped semi-conductive nylon belt, and a high-voltage corrugated metal sleeve 7 is arranged outside the super-clean XLPE insulating layer after passing through an insulating buffer layer; a low-eccentricity polyethylene outer sheath 9 is arranged outside the high-pressure corrugated metal sleeve after passing through the cable asphalt layer 8; the outermost surface layer is provided with a conductive layer 10; the insulation buffer layer comprises a super-smooth insulation shielding layer 5 tightly attached to the super-clean XLPE insulation layer 4 and a semi-conductive buffer water-blocking tape 6 positioned outside the super-smooth insulation shielding layer; the polyethylene outer sheath 9 is wrapped on the surface of the corrugated metal sleeve 7 which is evenly coated with the cable asphalt layer 8, and the corrugated metal sleeve, the polyethylene outer sheath and the low-resistance conductor 1 are concentrically arranged.
The processing method comprises the following steps:
(1) on the basis of ensuring that the electrical property is unchanged, the polyethylene outer sheath 9 is made of a material with a low melt index and a narrow molecular weight distribution, and is uniformly granulated.
(2) Drying the raw materials: the polyethylene outer sheath 9 material is dried before and during production. Spreading the raw materials on a grid conveyer belt, and continuously blowing the raw materials from the lower part of the conveyer belt by cold breeze at 25 ℃. The mesh on the mesh belt is a long hole with the diameter of 2mm multiplied by 10mm, the width of the small hole is smaller than the minimum size of the material particles, and the length of the small hole is larger than the maximum size of the material particles. The design of the long hole enables the wind-receiving surface of the material to be enlarged and uniform, and the blowing at lower wind speed enables moisture to be rapidly dispersed to ensure that the material is quick-drying.
(3) A pressure equalizing device is designed at the pressed part of the high-pressure corrugated metal sleeve 7. The pressure equalizing device is provided with a whole circle continuous correcting mechanism for the high-pressure corrugated metal sleeve 7, the whole circle continuous correcting mechanism is provided with a rolling type air pressure deviation rectifying push mold with 8 point positions along the whole circumference on the same cross section, namely the air pressure deviation rectifying push mold is provided with a push roller, and the high-pressure corrugated metal sleeve 7 is pinched, pushed, kneaded, rolled and the like in the moving process. The rounding continuous correction mechanism is continuously provided with 5 air-saving pressure deviation-rectifying push modules along the traveling direction of the high-pressure corrugated metal sleeve 7. The high roundness of the high-pressure corrugated metal sleeve 7 is completely ensured under the combined action of the 5-section die set.
(4) The high-pressure corrugated metal sleeve 7 is uniformly heated by the tubular soaking device, and asphalt is uniformly coated. The tubular soaking device comprises a shell, wherein a round soaking pipe is arranged in the shell, soaking small holes with the diameter of 2.5mm are fully distributed on the pipe wall of the round soaking pipe, a spiral annular air injection heat source channel is arranged outside the soaking pipe, and a heat source is input from the whole circumferential direction outside the soaking pipe and blows along with the reverse direction of the running direction of the cable with the high-pressure corrugated metal sleeve 7.
(5) Adjusting the temperature of an outlet of the extruder; the temperature of the outlet of the extruder is less than the melting temperature of the polyethylene by 2 ℃, and is slightly lower than the temperature of the common polyethylene sheath material. The screw of each sheath material extruder is an equal-depth non-equidistant screw with a diversion trench.
(6) A double-layer co-extrusion machine head is adopted, and a shunting channel is arranged; and a semi-extrusion die is arranged. Ensure the tightness of each layer of jacket and prevent eccentricity.
(7) And (3) carrying out sectional cooling: the temperature of the first section cooling water is 60 ℃ so as to reduce the stress of the first section cooling water to the maximum extent; the cooling water in the water tank at the rest section is 20 ℃. The cable is ensured to be completely cooled when being pulled by winding, and the eccentricity of the polyethylene outer sheath is not negatively influenced due to the winding pulling and the coiling amount.
In the manufacturing process, the coating of the cable asphalt layer 8 must be even, and the corrugated metal sleeve 7 is heated evenly, so that the polyethylene outer sheath 9 can be prevented from being heated unevenly, and the purposes of corrosion prevention and adhesion can be achieved by a perfect protective layer.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modified structures, processes, methods, and the like of the present invention are within the scope of the present invention.
Claims (8)
1. A processing method of a high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable is characterized in that a cable body structure comprises the following parts: the cable comprises a low-resistance conductor (1) positioned in a core part, a wrapped semi-conductive nylon tape (2) is arranged outside the low-resistance conductor, a super-clean XLPE insulating layer (4) is arranged outside the wrapped semi-conductive nylon tape, and a high-voltage corrugated metal sleeve (7) is arranged outside the super-clean XLPE insulating layer after passing through an insulating buffer layer; a low-eccentricity polyethylene outer sheath (9) is arranged outside the high-pressure corrugated metal sleeve after passing through a cable asphalt layer (8); the outermost surface layer is provided with a conductive layer (10);
the cable processing method comprises the following steps:
on the basis of ensuring that the electrical property is not changed, the material design of the polyethylene outer sheath (9) is low
The melt index, the narrower molecular weight distribution and the uniform granulation are realized;
(II) drying the raw materials: before and during production, the polyethylene outer sheath (9) material is dried;
thirdly, designing a pressure balancing device at the pressed part of the high-pressure corrugated metal sleeve (7); the pressure equalizing device is provided with a full circle continuous correction mechanism for the high-pressure corrugated metal sleeve (7), and the full circle continuous correction mechanism is provided with an air pressure deviation rectifying push mold with a plurality of point positions on the same cross section along the whole circumference;
fourthly, the high-pressure corrugated metal sleeve (7) is uniformly heated through the tubular soaking device, and asphalt is uniformly coated;
(V) adjusting the outlet temperature of the extruder;
sixthly, a double-layer co-extrusion machine head is adopted, and a sub-runner is arranged; and arranging a semi-extrusion type die;
(VII) cooling in sections: the temperature of the first-stage cooling water is 59-61 ℃; cooling in the water tank
The water content was 20 ℃.
2. The method for processing the power cable with the high-voltage corrugated metal sleeve and the low-eccentricity polyethylene outer sheath as claimed in claim 1, wherein the method comprises the following steps: the insulation buffer layer comprises a super-smooth insulation shielding layer (5) tightly attached to the super-clean XLPE insulation layer (4) and a semi-conductive buffer water-blocking tape (6) located outside the super-smooth insulation shielding layer.
3. The method for processing the power cable with the high-voltage corrugated metal sleeve and the low-eccentricity polyethylene outer sheath as claimed in claim 1 or 2, wherein the method comprises the following steps: the polyethylene outer sheath (9) is wrapped on the surface of the corrugated metal sleeve (7) which is uniformly coated with the cable asphalt layer (8), and the corrugated metal sleeve, the polyethylene outer sheath and the low-resistance conductor (1) are concentrically arranged.
4. The method for processing the high-pressure corrugated metal-sheathed low-eccentricity polyethylene outer sheath power cable according to claim 1 or 2, wherein the raw material is dried by spreading the raw material on a mesh conveyor belt and continuously blowing the raw material from the lower part of the conveyor belt by cool breeze at 20-30 ℃.
5. The processing method of the high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable according to claim 1, wherein the rounding continuous correction mechanism is continuously provided with a plurality of throttle deviation correction pushing modules along the traveling direction of the high-voltage corrugated metal sleeve (7).
6. The processing method of the high-pressure corrugated metal-sheathed low-eccentricity polyethylene outer sheath power cable according to claim 1 or 2, characterized in that the tubular heat soaking device comprises a shell, a heat soaking pipe is arranged in the shell, heat soaking small holes are distributed on the pipe wall of the heat soaking pipe, and a spiral annular air injection heat source channel is arranged outside the heat soaking pipe.
7. The method for processing the high-pressure corrugated metal-sheathed low-eccentricity polyethylene outer sheath power cable according to claim 1 or 2, wherein the sheath material extruder screw is an equal-depth non-equidistant screw with a diversion trench.
8. The method for processing the power cable with the high-pressure corrugated metal sleeve and the low-eccentricity polyethylene outer sheath as claimed in claim 1 or 2, wherein the outlet temperature of the extruder is less than the melting temperature of polyethylene, and the melting temperature of polyethylene is 2-3 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711318190.1A CN108091433B (en) | 2017-12-12 | 2017-12-12 | Processing method of high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711318190.1A CN108091433B (en) | 2017-12-12 | 2017-12-12 | Processing method of high-voltage corrugated metal sleeve low-eccentricity polyethylene outer sheath power cable |
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| CN108091433A CN108091433A (en) | 2018-05-29 |
| CN108091433B true CN108091433B (en) | 2021-05-25 |
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| CN114334232A (en) * | 2021-12-20 | 2022-04-12 | 杭州电缆股份有限公司 | Novel semi-conductive non-water-blocking buffer layer high-voltage power cable |
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|---|---|---|---|---|
| US4145387A (en) * | 1976-08-24 | 1979-03-20 | Wilhelm Hegler | Method of manufacturing double-wall plastic tubing in which the outer wall has transverse corrugations and the inner wall is smooth |
| CN104575837A (en) * | 2014-12-12 | 2015-04-29 | 浙江晨光电缆股份有限公司 | High-voltage power cable extruded with flat aluminum sheath and manufacturing method |
| CN204503892U (en) * | 2015-01-30 | 2015-07-29 | 杭州华新电力线缆有限公司 | A kind of high accuracy corrugating machine produced for corrugated metallic sheath |
| CN105336412A (en) * | 2014-08-15 | 2016-02-17 | 上海市高桥电缆厂有限公司 | Cable |
| CN106057371A (en) * | 2016-07-07 | 2016-10-26 | 远东电缆有限公司 | Smart energy HCCV ultrahigh-voltage crosslinking polyethylene-insulated power cable and manufacturing method thereof |
-
2017
- 2017-12-12 CN CN201711318190.1A patent/CN108091433B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145387A (en) * | 1976-08-24 | 1979-03-20 | Wilhelm Hegler | Method of manufacturing double-wall plastic tubing in which the outer wall has transverse corrugations and the inner wall is smooth |
| CN105336412A (en) * | 2014-08-15 | 2016-02-17 | 上海市高桥电缆厂有限公司 | Cable |
| CN104575837A (en) * | 2014-12-12 | 2015-04-29 | 浙江晨光电缆股份有限公司 | High-voltage power cable extruded with flat aluminum sheath and manufacturing method |
| CN204503892U (en) * | 2015-01-30 | 2015-07-29 | 杭州华新电力线缆有限公司 | A kind of high accuracy corrugating machine produced for corrugated metallic sheath |
| CN106057371A (en) * | 2016-07-07 | 2016-10-26 | 远东电缆有限公司 | Smart energy HCCV ultrahigh-voltage crosslinking polyethylene-insulated power cable and manufacturing method thereof |
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| CN108091433A (en) | 2018-05-29 |
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