阅读说明：本技术 一种纳米稀土铝合金电缆 (Nano rare earth aluminum alloy cable ) 是由 韩怡秋 霍桂新 韩长武 朱峰 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种纳米稀土铝合金电缆,所述纳米稀土铝合金电缆采用纳米稀土铝合金材料,经拉制、绞合、紧压的流程制备纳米稀土铝合金导体,再经退火后制成导体,再挤包抗老化XLPE绝缘材料,多芯成缆,挤包内护套,采用纳米铝合金带连锁铠装,最后包袱外护套。纳米稀土铝合金材料在纯铝材料的基础上添加了纳米稀土、铜、铁、银、硅等多种元素,显著提高电缆的柔韧性、抗蠕变性和耐腐蚀性,经过退火处理后电导率能达到62.5%以上。纳米稀土铝合金电力电缆是以纳米稀土改性铝合金材料为导体,采用特殊工艺和退火处理等先进技术发明创造的新型电力电缆,是铜缆的最佳替代品。(The invention discloses a nanometer rare earth aluminum alloy cable which is made of a nanometer rare earth aluminum alloy material, a nanometer rare earth aluminum alloy conductor is prepared through the processes of drawing, stranding and pressing, then the nanometer rare earth aluminum alloy conductor is prepared through annealing, an anti-aging XLPE insulating material is extruded, a plurality of cores are cabled, an inner sheath is extruded, a nanometer aluminum alloy belt is adopted for chain armoring, and finally an outer sheath is extruded. The nanometer rare earth aluminum alloy material is added with multiple elements such as nanometer rare earth, copper, iron, silver, silicon and the like on the basis of a pure aluminum material, so that the flexibility, the creep resistance and the corrosion resistance of the cable are obviously improved, and the electric conductivity can reach more than 62.5 percent after annealing treatment. The nano rare earth aluminum alloy power cable is a novel power cable invented and created by using a nano rare earth modified aluminum alloy material as a conductor and adopting advanced technologies such as a special process, annealing treatment and the like, and is an optimal substitute of a copper cable.)

1. A nanometer rare earth aluminum alloy cable is characterized by comprising the following steps:

step 1: the method adopts a nanometer rare earth aluminum alloy rod, special drawing equipment and a low-elongation drawing process, and special drawing lubricant oil, so that the minimum crystal defect is ensured when a single wire is recrystallized after drawing, and the stability of the mechanical property and the electrical property of the single wire is ensured;

step 2: the single wires obtained in the step 1, T-shaped single wires are stranded in multiple layers and opposite in adjacent layer direction to form a molded conductor; the round single wire is stranded in multiple layers, compressed in layers and in the opposite direction of the adjacent layers to form a stranded compressed conductor;

and step 3: putting the nano rare earth aluminum alloy conductor prepared in the step 2 into an annealing furnace, and annealing the nano rare earth aluminum alloy conductor at 340-460 ℃ for 13-15 hours;

and 4, step 4: and (3) coating the nano rare earth aluminum alloy conductor obtained in the step (3) on the nano rare earth aluminum alloy conductor by using a plastic extruder and an anti-aging special XLPE insulating material, and performing a spark test to prepare the nano rare earth aluminum alloy insulating conductor.

And 5: and (4) synthesizing the nano rare earth aluminum alloy insulated conductor obtained in the step (4) into a multi-core cable by using cabling equipment, adding proper fillers between the cores, and fastening the outside by using proper belts to prepare the multi-core cable core.

Step 6: and (5) coating the multi-core cable core obtained in the step (5) on the cable core of the multi-core cable by using a PVC sheath material by using a plastic extruder to prepare a semi-finished product of the inner sheath.

And 7: and (4) utilizing interlocking armor equipment and adopting a nano aluminum alloy belt to tie the nano aluminum alloy belt into an S shape by using a rolling mill, and spirally wrapping to enable the nano aluminum alloy belt to be self-locked to prepare the armor semi-finished product.

And 8: and (4) coating the armored semi-finished product obtained in the step (7) on the armored semi-finished product by using a PVC (polyvinyl chloride) sheath material by using a proper plastic extruder, and finally preparing the nano rare earth aluminum alloy cable after a spark test.

2. The nano rare earth aluminum alloy cable of claim 1, wherein: in the step 1, a specially-made nanometer rare earth aluminum alloy rod is adopted, and a wire drawing process with the elongation of 1.2 is adopted.

3. The nano rare earth aluminum alloy cable of claim 1, wherein: in the step 2, the filling coefficient of the special-shaped conductor is more than 98%, the outer diameter is reduced by 3-6%, and the filling coefficient of the round stranded compressed conductor is more than 90%.

4. The nano rare earth aluminum alloy cable of claim 1, wherein: in the step 3, the elongation of the annealed single line of the nano rare earth aluminum alloy conductor reaches more than 25%, and the electric conductivity is more than 62.5% IACS.

5. The nano rare earth aluminum alloy cable of claim 1, wherein: in the step 4, both the filler and the bundling belt of the cable core are made of materials which do not have any adverse effect on XLPE.

6. The nano rare earth aluminum alloy cable of claim 1, wherein: in the step 5, a 90-degree PVC sheath material is adopted.

7. The nano rare earth aluminum alloy cable of claim 1, wherein: in the step 6, the nano aluminum alloy belt self-locking technology is adopted, so that the strength of the armor layer is improved, and the cable is easy to bend.

8. The nano rare earth aluminum alloy cable of claim 1, wherein: in step 7, a 90-degree PVC sheathing material is adopted.

Technical Field

The invention relates to the technical field of nano materials, in particular to a nano rare earth aluminum alloy cable.

Background

China is a country lacking copper and rich in aluminum, nearly two thirds of copper needs to be imported every year, and in recent years, China puts forward a technical policy of replacing copper with aluminum and starts to popularize and apply aluminum materials in the wire and cable industry and other industries. Because the creep property of aluminum itself causes the frequent occurrence of failures of aluminum cable joints, later cable enterprises develop aluminum alloy cables in a dispute, and hope to make up for the defects of pure aluminum and promote the popularization and application of replacing copper with aluminum, but the conductivity of the conventional aluminum alloy conductor cannot be improved all the time, so that a novel aluminum alloy cable with good creep resistance, high elongation and better conductivity needs to be developed.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel power cable invented and created by taking a nano rare earth modified aluminum alloy material as a conductor and adopting advanced technologies such as a special process, annealing treatment and the like, aiming at the defects in the prior art, and the novel power cable has the advantages of good creep resistance and corrosion resistance, good conductivity, good elongation, light weight and convenience in construction, and is an optimal substitute for a copper cable.

In order to achieve the purpose, the invention provides the following technical scheme:

a nanometer rare earth aluminum alloy cable comprises the following steps:

step 1: the method adopts a nanometer rare earth aluminum alloy rod, special drawing equipment and a low-elongation drawing process, and special drawing lubricant oil, so that the minimum crystal defect is ensured when a single wire is recrystallized after drawing, and the stability of the mechanical property and the electrical property of the single wire is ensured;

step 2: the single wires obtained in the step 1, T-shaped single wires are stranded in multiple layers and opposite in adjacent layer direction to form a molded conductor; the round single wire is stranded in multiple layers, compressed in layers and in the opposite direction of the adjacent layers to form a stranded compressed conductor;

and step 3: putting the nano rare earth aluminum alloy conductor prepared in the step 2 into an annealing furnace, and annealing the nano rare earth aluminum alloy conductor at 340-460 ℃ for 13-15 hours;

and 4, step 4: and (3) coating the nano rare earth aluminum alloy conductor obtained in the step (3) on the nano rare earth aluminum alloy conductor by using a plastic extruder and an anti-aging special XLPE insulating material, and performing a spark test to prepare the nano rare earth aluminum alloy insulating conductor.

And 5: and (4) synthesizing the nano rare earth aluminum alloy insulated conductor obtained in the step (4) into a multi-core cable by using cabling equipment, adding proper fillers between the cores, and fastening the outside by using proper belts to prepare the multi-core cable core.

Step 6: and (5) coating the multi-core cable core obtained in the step (5) on the cable core of the multi-core cable by using a PVC sheath material by using a plastic extruder to prepare a semi-finished product of the inner sheath.

And 7: and (4) utilizing interlocking armor equipment and adopting a nano aluminum alloy belt to tie the nano aluminum alloy belt into an S shape by using a rolling mill, and spirally wrapping to enable the nano aluminum alloy belt to be self-locked to prepare the armor semi-finished product.

And 8: and (4) coating the armored semi-finished product obtained in the step (7) on the armored semi-finished product by using a PVC (polyvinyl chloride) sheath material by using a proper plastic extruder, and finally preparing the nano rare earth aluminum alloy cable after a spark test.

As a further scheme of the invention: in the step 1, a specially-made nanometer rare earth aluminum alloy rod is adopted, and a wire drawing process with the elongation of 1.2 is adopted.

As a further scheme of the invention: in the step 2, the filling coefficient of the special-shaped conductor is more than 98%, the outer diameter is reduced by 3-6%, and the filling coefficient of the round stranded compressed conductor is more than 90%.

As a further scheme of the invention: in the step 3, the elongation of the annealed single line of the nano rare earth aluminum alloy conductor reaches more than 25%, and the electric conductivity is more than 62.5% IACS.

As a further scheme of the invention: in the step 4, both the filler and the bundling belt of the cable core are made of materials which do not have any adverse effect on XLPE.

As a further scheme of the invention: in the step 5, a 90-degree PVC sheath material is adopted.

As a further scheme of the invention: in the step 6, the nano aluminum alloy belt self-locking technology is adopted, so that the strength of the armor layer is improved, and the cable is easy to bend.

As a further scheme of the invention: in step 7, a 90-degree PVC sheathing material is adopted.

Compared with the prior art, the invention has the beneficial effects that: according to the nano rare earth aluminum alloy material, multiple elements such as nano rare earth, copper, iron, silver, silicon and the like are added on the basis of a pure aluminum material, so that the flexibility, the creep resistance and the corrosion resistance of the cable are remarkably improved, and the conductivity can reach over 62.5% after annealing treatment. The nanometer rare earth aluminum alloy power cable is a best substitute of a copper cable, has excellent compressive creep resistance as the same as the copper conductor, ensures the thermal stability of a joint, is safe and reliable, has the weight of about 30 percent of the weight of the copper cable under the same load flow, can avoid bridge laying or reduce the using amount of a bridge and the bearing weight, is convenient to construct and has low labor intensity;

1. adopts a nanometer rare earth aluminum alloy rod, and adopts novel wire drawing equipment and production process to ensure the mechanical property and the electrical property of a single wire

2. And (3) designing a T-shaped single wire, and stranding a plurality of strands of single wires by adopting a nano stranding die to produce the nano rare earth aluminum alloy conductor.

3. And (3) putting the prepared nano rare earth aluminum alloy conductor into a special annealing furnace, and annealing the nano rare earth aluminum alloy conductor, wherein the elongation of the single wire of the processed nano rare earth aluminum alloy conductor reaches over 25 percent, and the electric conductivity of the single wire of the processed nano rare earth aluminum alloy conductor reaches over 62.5 percent IACS.

4. And coating the prepared nano rare earth aluminum alloy conductor on the nano rare earth aluminum alloy conductor by using an appropriate plastic extruder and an ageing-resistant special XLPE insulating material, and performing a spark test to prepare the nano rare earth aluminum alloy insulating conductor.

5. And (3) synthesizing the prepared nano rare earth aluminum alloy insulated conductor into a multi-core cable by using a proper cabling device, adding proper fillers between the cores, and fastening the outside by using a proper belt to prepare the multi-core cable core.

6. And coating the prepared multi-core cable core on the cable core of the multi-core cable by using a PVC sheath material by using a proper plastic extruder to prepare a semi-finished product of the inner sheath.

7. And (3) utilizing special interlocking armor equipment and a special interlocking armor process to manufacture the semi-finished inner sheath by adopting a nano aluminum alloy strip and an S-shaped self-locking armor structure. The nano aluminum alloy self-locking armor structure improves the bending property and the pressure resistance of the cable.

8. And coating the prepared armored semi-finished product on the armored semi-finished product by using a PVC (polyvinyl chloride) sheath material by using a proper plastic extruder, and finally preparing the nano rare earth aluminum alloy cable after a spark test.

Detailed Description

The present invention will be described in further detail below for the purpose of better understanding the technical solutions of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A nanometer rare earth aluminum alloy cable comprises the following steps:

step 1: the nanometer rare earth aluminum alloy rod is adopted as a conductor material, special drawing equipment with the speed ratio of 1.2 and a low-elongation drawing process are adopted, and special drawing lubricating oil is adopted, so that the minimum crystal defect is ensured when a single wire is recrystallized after drawing, and the stability of the mechanical property and the electrical property of the single wire is ensured.

Step 2: the single wires obtained in the step 1, namely T-shaped single wires, are stranded in multiple layers and are opposite in adjacent layer direction to form a formed conductor, the filling coefficient of the formed conductor reaches more than 98%, and the outer diameter is reduced by 3-6%; the round single wire is stranded by multiple layers, is compressed by layering, is prepared into a stranded compressed conductor with opposite layer facing directions, and has a filling coefficient of more than 90 percent.

And step 3: and (3) putting the nano rare earth aluminum alloy conductor prepared in the step (2) into a special annealing furnace, annealing the nano rare earth aluminum alloy conductor at the temperature of 340-460 ℃ for 13-15 hours, wherein the single wire elongation of the treated nano rare earth aluminum alloy conductor reaches over 25 percent, and the electric conductivity is over 62.5 percent IACS.

And 4, step 4: and (3) coating the nano rare earth aluminum alloy conductor obtained in the step (3) on the nano rare earth aluminum alloy conductor by using an appropriate plastic extruder and adopting an ageing-resistant special XLPE insulating material, and performing a spark test to prepare the nano rare earth aluminum alloy insulating conductor.

And 5: and (4) synthesizing the nano rare earth aluminum alloy insulated conductor obtained in the step (4) into a multi-core cable by using proper cabling equipment, adding proper fillers between the cable cores, and fastening the outside by using proper belts to prepare the multi-core cable core.

Step 6: and (5) coating the multi-core cable core obtained in the step (5) on the cable core of the multi-core cable by using a PVC sheath material by using a proper plastic extruder to prepare a semi-finished product of the inner sheath.

And 7: and (4) utilizing interlocking armor special equipment and adopting a nano aluminum alloy belt to tie the nano aluminum alloy belt into an S shape by using a rolling mill, and spirally wrapping to enable the nano aluminum alloy belt to be self-locked to prepare the armor semi-finished product.

And 8: and (4) coating the armored semi-finished product obtained in the step (7) on the armored semi-finished product by using a PVC (polyvinyl chloride) sheath material by using a proper plastic extruder, and finally preparing the nano rare earth aluminum alloy cable after a spark test.

Those not described in detail in this specification are within the skill of the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.