CN111681815B - High-carrying-capacity modified polypropylene insulating multi-core cable - Google Patents
High-carrying-capacity modified polypropylene insulating multi-core cable Download PDFInfo
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- CN111681815B CN111681815B CN202010455626.7A CN202010455626A CN111681815B CN 111681815 B CN111681815 B CN 111681815B CN 202010455626 A CN202010455626 A CN 202010455626A CN 111681815 B CN111681815 B CN 111681815B
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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
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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
- H01B7/02—Disposition of insulation
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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
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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
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/428—Heat conduction
Abstract
The invention belongs to the field of cables, and particularly relates to a high-current-carrying-capacity modified polypropylene insulating multi-core cable. It includes: the core wire group consists of at least two core wires and is used for realizing power transmission; the outer sheath is coated outside the armor layer to protect the core wire group and the armor layer; wherein: the core wire comprises a conductor and a modified insulating layer coated outside the conductor; the modified insulating layer is a modified polypropylene insulating layer, and the modified polypropylene insulating layer is prepared from a modified polypropylene insulating material. The invention replaces the cross-linked polyethylene with the modified polypropylene, thereby reducing the cost and improving the quality of the insulating layer; the current-carrying capacity and the actual bearable working temperature of the cable are obviously improved; the modified polypropylene can be recycled, so that the environment is protected; the whole cable has higher structural stability and stronger anti-distortion capability; after the Si-C-Al doped cable has good heat conduction and heat dissipation performance.
Description
Technical Field
The invention belongs to the field of cables, and particularly relates to a high-current-carrying-capacity modified polypropylene insulating multi-core cable.
Background
Most of medium-voltage cables at the present stage adopt crosslinked polyethylene as an insulating material, and the material takes the polyethylene as a base material and is crosslinked through a chemical reaction process to form the crosslinked polyethylene, so that toxic substances are generated in the crosslinking processing process of the insulating layer, and the difficulty is brought to later recovery and environmental protection; meanwhile, the crosslinked polyethylene cable still has the generation of insulation hidden troubles such as 'water tree branches' in operation, and brings certain influence to the urban power supply reliability with abundant underground water and high cable coverage rate. The cable industry is constantly looking for new materials and processes to replace crosslinked polyethylene.
For example, chinese patent office authorizes, authorizes the utility model patent of a crosslinked polyethylene insulated power cable that discloses in 2012 12 months 26 days, and the publication number of authorizing is CN202632858U, and it includes conductor, insulating layer, filling layer, band layer and oversheath, and its packing through crosslinked polyethylene has improved the power transmission performance of cable, nevertheless its current-carrying capacity still has certain promotion space to this technical scheme's whole fire behaviour is comparatively limited, and operating temperature is lower, is difficult to bear higher operating temperature.
Disclosure of Invention
The invention provides a high-current-carrying-capacity modified polypropylene insulating multi-core cable, which aims to solve the problems that a large amount of cross-linked polyethylene with higher cost and limited performance is adopted in the existing cable, so that environmental pollution is caused, certain potential safety hazards exist in the actual use process, and the like.
The invention aims to:
1) the material cost of the insulating layer is reduced;
2) the quality of the insulating layer is improved, and potential safety hazards in the actual operation process of the cable are reduced;
3) the current-carrying capacity of the cable is improved;
4) the working temperature of the cable is improved;
5) the structural stability of the cable is improved;
6) the high-voltage power transmission capability of the cable is improved.
A high ampacity modified polypropylene insulated multi-core cable comprising:
the core wire group consists of at least two core wires and is used for realizing power transmission;
the outer sheath is coated outside the armor layer to protect the core wire group and the armor layer;
wherein:
the core wire comprises a conductor and a modified insulating layer coated outside the conductor;
the modified insulating layer is a modified polypropylene insulating layer, and the modified polypropylene insulating layer is prepared from a modified polypropylene insulating material. .
As a preference, the first and second liquid crystal compositions are,
the core wire group is composed of three core wires which are uniformly distributed along the circumferential direction of the axis of the cable.
As a preference, the first and second liquid crystal compositions are,
and fillers are arranged in gaps of the core wires in the core wire group.
As a preference, the first and second liquid crystal compositions are,
an inner shielding layer is arranged between the conductor and the modified insulating layer;
and an insulating shielding layer is arranged between the modified insulating layer and the inner sheath.
As a preference, the first and second liquid crystal compositions are,
and a metal shielding layer is coated outside the insulating shielding layer.
As a preference, the first and second liquid crystal compositions are,
the steel wire rope further comprises a belting layer and an armor layer;
the belting layer is formed by winding and coating a belting outside the core wire group;
the armor layer is coated outside the belting layer to protect the core wire group.
As a preference, the first and second liquid crystal compositions are,
an inner sheath is arranged outside the wrapping tape layer;
the inner sheath closely wraps the outer surface of the belting layer, and the armor closely wraps the outer surface of the inner sheath.
As a preference, the first and second liquid crystal compositions are,
the outer sheath is of a double-layer structure and is divided into an inner layer and an outer layer, and the inner layer and the outer layer are meshed through the arch grains;
an alkali lime layer is arranged between the outer layer and the inner layer of the outer sheath.
As a preference, the first and second liquid crystal compositions are,
the modified insulating layer is also doped with Si-C-Al composite filler;
the doping amount of the Si-C-Al composite filler is 12-15 wt% of the modified polypropylene insulating material.
As a preference, the first and second liquid crystal compositions are,
the Si-C-Al composite filler is prepared by the following process:
mixing carbon source powder, aluminum powder and silicon powder into mixed powder, wherein the mass ratio of the carbon source powder to the aluminum powder to the elemental silicon powder is controlled to be 1: (1.9-2.1): (6.9-7.1), uniformly mixing the mixed materials to obtain mixed powder, pressing and forming to obtain an anode, placing a graphite electrode as a cathode, placing the anode and the cathode in an argon atmosphere protection environment, applying direct current between the cathode and the anode, wherein the direct current is 175-185A until the anode is worn and the reaction is blocked, cooling, and collecting the powder on the inner wall of a reaction container to obtain the Si-C-Al composite filler powder.
The invention has the beneficial effects that:
1) the modified polypropylene is used for replacing the crosslinked polyethylene, so that the cost is reduced, and the quality of the insulating layer is improved;
2) the current-carrying capacity and the actual bearable working temperature of the cable are obviously improved;
3) the modified polypropylene can be recycled, so that the environment is protected;
4) the whole cable has higher structural stability and stronger anti-distortion capability;
5) after the Si-C-Al doped cable has good heat conduction and heat dissipation performance.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of the outer sheath;
in the figure: 1 core wire, 101 conductors, 102 inner shield layers, 103 modified insulating layers, 104 insulating shield layers, 105 metal shield layers, 2 belting layers, 3 inner sheaths, 4 fillers, 5 armor layers, 6 outer sheaths, 601 outer layers, 602 inner layers and 603 alkali lime layers.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and the attached drawing figures. Those skilled in the art will be able to implement the invention based on these teachings. Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless otherwise specified, the raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the examples of the present invention are all those known to those skilled in the art.
Example 1
A high ampacity modified polypropylene insulated multi-core cable as shown in fig. 1, comprising:
the core wire 1 group, the belting layer 2, the inner sheath 3, the armor layer 5 and the outer sheath 6 are arranged from inside to outside in sequence;
the core wire 1 group consists of a plurality of core wires 1, in the embodiment, the core wire 1 group consists of three core wires 1, the three core wires 1 are uniformly distributed in a triangular manner along the circumferential direction of the axis of the cable as shown in fig. 1, fillers 4 are arranged in gaps of the core wire 1 group, and the fillers 4 are filling ropes;
the core wire 1 comprises a conductor 101, an inner shielding layer 102, a modified insulating layer 103, an insulating shielding layer 104 and a metal shielding layer 105 from inside to outside in sequence;
the conductor 101 is a common cable conductor 101 and can be stranded copper, single copper, copper plated after stranded, copper clad aluminum and the like;
the inner shielding layer 102 is tightly coated on the outer surface of the conductor 101 and is prepared by common shielding materials, preferably polypropylene shielding materials are adopted, the polypropylene shielding materials are thermoplastic polypropylene semiconductor 101 electric shielding materials, the arrangement of the inner shielding layer 102 homogenizes an electric field on the outer surface of the conductor 101, and the problem that the conductor 101 and an insulating part generate partial discharge due to the fact that the outer surface of the conductor 101 is not smooth and the defects of the conductor 101 are avoided;
modified insulating layer 103 closely wraps the external surface of inner shield layer 102, closely laminates with inner shield layer 102, and it is prepared by modified polypropylene, modified polypropylene is prepared by polypropylene and ethylene monomer, and ethylene monomer quantity is 2 ~ 3 wt% of polypropylene, and this embodiment ethylene monomer quantity is 3 wt% of polypropylene, and the preparation flow is in proper order: mixing, block copolymerization, extrusion cooling, granulation and drying are carried out according to the proportion;
ethylene-propylene rubber copolymer can be prepared by block copolymerization of 2-3% of ethylene monomer on a polypropylene main chain, and high-purity modified polypropylene insulating material is obtained by granulation, and has excellent electrical property, ageing resistance and mechanical and physical properties;
in addition, the prepared modified polypropylene belongs to a thermoplastic elastomer, has the advantages of both polyethylene and polypropylene, can resist low-temperature impact at minus 30 ℃, and has good insulating property, high and low temperature performance, high strength and low cost; not only the material is safe, but also the toxicity is low and the material can be recycled; the thermoplastic process can also make the insulation layer and the shielding layer contact more tightly, effectively avoid the generation of defects such as air gaps and the like, and bring higher temperature-resistant grade to the cable;
through measurement and calculation, the current-carrying capacity of the high-current-carrying-capacity modified polypropylene insulated multi-core cable insulated by the modified polypropylene can be further improved by about 6.74%;
the insulation shielding layer 104 is tightly coated on the outer surface of the modified insulation layer 103 and is prepared by common shielding materials, preferably by polypropylene shielding materials, the polypropylene shielding materials are thermoplastic polypropylene semiconductor 101 electric shielding materials, the insulation shielding layer 104 is mainly arranged by matching with the inner shielding layer 102, and the combination of the insulation shielding layer 104 and the inner shielding layer 102 is arranged, so that the problem that the optical cable is damaged due to partial discharge generated between the insulation layer and the metal shielding layer 105 can be avoided, and the partial discharge generated by the rest of the metal shielding layers 105 due to the defects of surface cracks and the like of the insulation shielding layer 104 can be effectively avoided;
the metal shielding layer 105 is formed by tightly wrapping a metal material with good conductivity, such as a copper wire or a copper strip, on the outer surface of the insulating shielding layer 104 in a wrapping mode and the like, and further tightly wrapping the metal shielding layer 105 with a non-woven fabric wrapping tape to form a wrapping tape layer 2;
the metal shielding layer 105 mainly plays a role in shielding an electric field, and the wrapping tape can further stabilize the metal shielding layer 105 and protect the metal shielding layer 105 to a certain extent;
the belting layer 2 is formed by non-woven belting, the non-woven belting is tightly wound around the core wires 1 to form the belting layer 2 to bind and constrain a plurality of core wires 1 in the core wire 1 group, so that the core wires 1 form the core wire 1 group in a bundle;
the inner sheath 3 and the outer sheath 6 are both flame-retardant sheaths and are made of flame-retardant materials, the inner sheath 3 is tightly coated on the outer surface of the belting layer 2 and is tightly coated by the armor layer 5, and the outer sheath 6 is tightly coated outside the armor layer 5;
the material of the outer sheath 6 is preferably a flame-retardant soft polyvinyl chloride sheath material, or a flame-retardant polyethylene sheath material, or a thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath material, and the like, wherein the flame-retardant soft polyvinyl chloride sheath material is a 90 ℃ flame-retardant soft polyvinyl chloride sheath material, and the thermoplastic low-smoke halogen-free flame-retardant polyolefin sheath material is a thermoplastic 90 ℃ low-smoke halogen-free flame-retardant polyolefin sheath material;
the armor layer 5 is a metal armor layer 5, and the metal armor layer 5 is formed by winding and cladding a stainless steel band or a stainless steel wire;
the outer sheath 6 is a double-layer structure as shown in fig. 3, and is divided into an outer layer 601 and an inner layer 602, the outer layer 601 and the inner layer 602 of the outer sheath 6 are engaged and fixed through the arch threads, and the design of the arch threads enables the inner layer 602 and the outer layer 601 of the outer sheath 6 to have certain anti-twisting capability, and the inner layer 602 and the outer layer 601 can be combined more stably on the basis;
meanwhile, the arch grain has the characteristic of being directly extruded, prepared and formed, and the preparation is simple and convenient;
an extremely thin soda lime layer is paved and filled between the inner layer 602 and the outer layer 601 of the outer sheath 6 to form a soda lime layer 602;
the common flame-retardant outer sheath 6 can generate a large amount of hydrogen chloride gas under the action of high heat so as to realize the flame-retardant effect, but excessive hydrogen chloride generated during flame retardance can also cause corrosion and aging of the cable, so that the overall mechanical performance of the cable after flame retardance is rapidly reduced, the cable is easy to break and the like before maintenance and replacement, and the components in the soda lime can effectively absorb the hydrogen chloride gas and absorb heat to remove water, so that the cable also has the effects of further flame retardance and temperature reduction;
the paving of the soda lime can also improve the friction force between the outer layer 601 and the inner layer 602 of the outer sheath 6, and further improve the structural stability of the outer sheath and the inner layer.
The cable of the invention is tested and compared with the cable of a comparison group, the cable of the embodiment and the cable of the comparison group are respectively provided with 20 test groups, and the cable of the comparison group is only different from the cable of the embodiment in that the modified insulating layer 103 is replaced by a conventional insulating layer, namely, the modified polypropylene is replaced by crosslinked polyethylene, and the rest parts are the same:
and (3) testing the working temperature:
the cable can stably run at 105 ℃, and 2-week tests show that the cable can maintain good working stability in 105 ℃ environment, and the current-carrying capacity fluctuation is less than 0.5%;
the current carrying capacity of the control cable decreased by about 6.70% after running at 105 ℃ for 2 weeks;
and (3) carrying capacity measurement:
the current carrying capacity of the cable of the present embodiment is 106.63-107.20% of the control group, based on 100% of the current carrying capacity measured by the control group, and the average value is about 106.74%, resulting in about 6.74% of current carrying capacity boost.
Example 2
The ethylene propylene rubber copolymer is further doped with a Si-C-Al composite filler, the addition amount of the Si-C-Al composite filler is 12-15 wt% of the ethylene propylene rubber copolymer, and the heat conduction and heat dissipation performance of the modified insulating layer can be further improved through the doping of the Si-C-Al composite filler, and the insulativity and the electric breakdown resistance of the modified insulating layer are improved to a certain extent;
the Si-C-Al composite filler is prepared by the following process:
mixing the coke powder, the aluminum powder and the elemental silicon powder into mixed powder, wherein the mass ratio of the coke powder to the aluminum powder to the elemental silicon powder is controlled to be 1: (1.9-2.1): (6.9-7.1), the mass ratio of the coke powder, the aluminum powder and the elemental silicon powder adopted in the embodiment is 1: 2: 7, uniformly mixing the mixed materials into mixed powder, pressing and forming to form a block material, placing the formed block material as an anode and a graphite electrode as a cathode in the protection of argon atmosphere, applying direct current between the cathode and the anode, wherein the direct current is 175-185A, 180A in the embodiment, until the anode is worn and blocked to react, cooling for 24 hours, and collecting powder on the inner wall of a reaction container to obtain Si-C-Al composite filler powder;
the Si-C-Al composite filler powder is doped by adopting the following process:
mixing 3 parts by weight of ethylene monomer and 100 parts by weight of polypropylene according to a ratio, adding 13.5 parts by weight of Si-C-Al composite filler in the mixing process, carrying out block copolymerization on ethylene and polypropylene by adopting a conventional process, then extruding and cooling to obtain an ethylene propylene rubber copolymer doped with the Si-C-Al composite filler, and then granulating and drying to obtain a modified polypropylene insulating material doped with the Si-C-Al composite filler;
the Si-C-Al composite filler is added in the mixing process, so that good and uniform doping can be realized, the doping of the Si-C-Al composite filler can be used as a polymerization center of subsequent block copolymerization, and the block copolymer can well coat the Si-C-Al composite filler due to the good affinity of silicon.
The same test as example 1 was conducted by replacing the modified polypropylene insulator of example 1 with a modified polypropylene insulator doped with a Si-C-Al composite filler, and comparing with the cables of example 1 and the control group.
And (3) testing the working temperature:
the cable can stably run at 105 ℃, and 2-week tests show that the cable can maintain good working stability in 105 ℃ environment, and the current-carrying capacity fluctuation is less than 0.2%;
example 1 the cable had a ampacity variation of < 0.5% after 2 weeks of operation at 105 ℃;
the current carrying capacity of the control cable decreased by about 6.70% after running at 105 ℃ for 2 weeks;
and (3) carrying capacity measurement:
based on 100% of the current-carrying capacity measured by the control group, the current-carrying capacity of the cable in example 1 is 106.63-107.20% of the control group, the average value is 106.74%, and the current-carrying capacity of the cable in this example is 108.68-109.22% of the control group, the average value is 108.91%, and the current-carrying capacity is about 8.91%, and the improvement is more significant compared with that in example 1;
measuring the temperature of the high-voltage power transmission cable:
the method is characterized in that 120kV high-voltage power transmission is adopted to remotely monitor the surface temperature of a service cable, the monitored surface temperature of a comparison group cable can reach 72.4-72.5 ℃, the surface temperature of the cable in example 1 can reach 71.3-71.5 ℃, the surface temperature of the cable in this example is only 43.9-44.0 ℃, and the actual service temperature is reduced by 39.2-39.5 percent compared with the comparison group cable Medium loss, base temperature and other factors determine, and generally is a key factor limiting the actual transmission performance of the cable, compared with the existing crosslinked polyethylene insulated cable, the allowable maximum temperature increase in the actual service process of the embodiment 1 shows that the cable can carry out higher-voltage power transmission, and the embodiment 2 scheme enables the surface temperature of the cable in the actual service process to be significantly lower than the embodiment 1 scheme, so that the cable has a good heat conduction and dissipation effect, the cable performance can be further effectively improved, and the high-voltage power transmission capability can be further improved.
Claims (9)
1. The utility model provides a high ampacity modified polypropylene insulation multicore cable which characterized in that includes:
the core wire group consists of at least two core wires and is used for realizing power transmission;
the outer sheath is coated outside the armor layer to protect the core wire group and the armor layer;
wherein:
the core wire comprises a conductor and a modified insulating layer coated outside the conductor;
the modified insulating layer is a modified polypropylene insulating layer, and is prepared from a modified polypropylene insulating material;
the modified insulating layer is also doped with Si-C-Al composite filler;
the doping amount of the Si-C-Al composite filler is 12-15 wt% of the modified polypropylene insulating material;
in the Si-C-Al composite filler, the mass ratio of carbon source powder, aluminum powder and elemental silicon powder is 1: (1.9-2.1): (6.9-7.1).
2. The insulated multi-core cable with high ampacity and modified polypropylene according to claim 1,
the core wire group is composed of three core wires which are uniformly distributed along the circumferential direction of the axis of the cable.
3. The insulated multi-core cable with high ampacity and modified polypropylene according to claim 1,
and fillers are arranged in gaps of the core wires in the core wire group.
4. A high ampacity modified polypropylene insulated multi-core cable according to claim 1, 2 or 3,
an inner shielding layer is arranged between the conductor and the modified insulating layer;
and an insulating shielding layer is arranged between the modified insulating layer and the inner sheath.
5. The insulated multi-core cable with high ampacity and modified polypropylene according to claim 4,
and a metal shielding layer is coated outside the insulating shielding layer.
6. A high ampacity modified polypropylene insulated multi-core cable according to claim 1, 2 or 3,
the steel wire rope further comprises a belting layer and an armor layer;
the belting layer is formed by winding and coating a belting outside the core wire group;
the armor layer is coated outside the belting layer to protect the core wire group.
7. The insulated multi-core cable with high ampacity and modified polypropylene according to claim 6,
an inner sheath is arranged outside the wrapping tape layer;
the inner sheath closely wraps the outer surface of the belting layer, and the armor closely wraps the outer surface of the inner sheath.
8. A high ampacity modified polypropylene insulated multi-core cable according to claim 1, 2 or 3,
the outer sheath is of a double-layer structure and is divided into an inner layer and an outer layer, and the inner layer and the outer layer are meshed through the arch grains;
an alkali lime layer is arranged between the outer layer and the inner layer of the outer sheath.
9. The insulated multi-core cable with high ampacity and modified polypropylene according to claim 1,
the Si-C-Al composite filler is prepared by the following process:
mixing carbon source powder, aluminum powder and silicon powder into mixed powder, wherein the mass ratio of the carbon source powder to the aluminum powder to the elemental silicon powder is controlled to be 1: (1.9-2.1): (6.9-7.1), uniformly mixing the raw materials into mixed powder, pressing and forming to be used as an anode, placing a graphite electrode as a cathode in the protection of argon atmosphere, applying direct current between the cathode and the anode, wherein the direct current is 175-185A until the anode is worn and blocked to react, cooling, and collecting the powder on the inner wall of a reaction container to obtain the Si-C-Al composite filler powder.
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| CN106747447A (en) * | 2016-06-25 | 2017-05-31 | 河南工业大学 | One kind synthesis Al4SiC4The new method of powder body material |
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| CN209625869U (en) * | 2019-05-07 | 2019-11-12 | 天津正标津达线缆集团有限公司 | A kind of resistance to compression water proof type cross-linking polytene insulation control cable |
| CN211980230U (en) * | 2020-04-23 | 2020-11-20 | 浙江万马股份有限公司 | Multi-core armored flame-retardant cable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09213137A (en) * | 1996-01-30 | 1997-08-15 | Showa Electric Wire & Cable Co Ltd | Ant proofing electric wire and cable |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856115A (en) * | 2015-12-08 | 2017-06-16 | 湖北龙腾红旗电缆(集团)有限公司 | Cold-resistant power cable used for wind power generation |
| CN106747447A (en) * | 2016-06-25 | 2017-05-31 | 河南工业大学 | One kind synthesis Al4SiC4The new method of powder body material |
| CN209625869U (en) * | 2019-05-07 | 2019-11-12 | 天津正标津达线缆集团有限公司 | A kind of resistance to compression water proof type cross-linking polytene insulation control cable |
| CN211980230U (en) * | 2020-04-23 | 2020-11-20 | 浙江万马股份有限公司 | Multi-core armored flame-retardant cable |
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