Environment-friendly aluminum alloy cable and laying method
By combining aluminum alloy conductors with vegetation planting, the problems of high cost of copper cables and soil damage were solved, achieving environmentally friendly cable laying, reducing material costs and protecting the soil.
Patent Information
- Application Number
- CN202511076765.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-01
- Publication Date
- 2025-12-30
AI Technical Summary
Existing copper cables are expensive and damage the soil, failing to meet the environmental protection requirements of a green ecological strategy.
Aluminum alloy conductors are used instead of copper conductors, and through-root tubes and root sleeves are installed on the outside of the cable. Combined with vegetation planting, the roots and stems of plants are used to stabilize the cable, reducing the amount of cable trench excavation. Halogen-free materials are used to reduce pollutant release.
It reduced material costs by more than 30%, reduced the amount of cable trench excavation, protected the soil, and achieved environmentally friendly cable laying.
Smart Images
Figure CN121237483A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cable technology, specifically to an environmentally friendly aluminum alloy cable and its laying method. Background Technology
[0002] For a considerable period of time to come, my country's urbanization will continue to advance steadily, leading to a surge in demand for urban power grid upgrades, new energy charging pile construction, and smart city underground utility tunnels, with the annual growth rate of direct-buried cables exceeding 15%.
[0003] In the existing technology, traditional copper cables are expensive (due to high copper prices and heavy weight), and the cable jacket is basically made of halogen-containing materials. When buried in the soil, they will cause some damage to the soil and do not meet the environmental protection requirements of the current green ecological strategy. Summary of the Invention
[0004] The purpose of this invention is to develop an environmentally friendly aluminum alloy cable and its laying method that uses aluminum alloy conductors instead of copper conductors to reduce costs and does not damage the soil.
[0005] This invention is achieved through the following technical solution:
[0006] An environmentally friendly aluminum alloy cable, comprising:
[0007] The battery cell layer, water-blocking layer, isolation layer, armor layer, and outer sheath are arranged sequentially from the inside out.
[0008] The root sleeve is fitted onto the outer sheath of the cable;
[0009] A root canal is placed in the soil above the root sleeve.
[0010] The battery cell layer includes multiple aluminum alloy conductors, the outer sheath is halogen-free TPU or halogen-free PUR, plant seeds are buried at the top opening of the root canal, the root canal is filled with nutrient soil, and the density of the nutrient soil in the root canal gradually decreases from top to bottom.
[0011] Optionally, the distance between the top opening of the root canal and the soil surface shall not exceed 5cm, and the distance between the bottom opening of the root canal and the cable shall not exceed 3cm.
[0012] Optionally, the root loops are arranged at equal intervals on the cable, the through-root tubes are arranged at an angle, and the through-root tubes are at an angle of 15° to the vertical.
[0013] Optionally, the layered structure of the permeable root canal includes, from the inside out, an inner lining layer, a support layer, and a water-conducting layer, all of which are made of biodegradable materials. The support layer is the skeleton structure of the permeable root canal, and the water-conducting layer guides water from the soil surface into the interior of the permeable root canal.
[0014] Optionally, the inner lining layer is made of ramie fiber, the support layer and the water-conducting layer are made of polylactic acid or polyhydroxyalkanoate, the support layer has a mesh structure, the inner lining layer is wound around the support layer, the water-conducting layer is a cylindrical structure connected to the outside of the support layer, the water-conducting layer is hollow inside, and the water-conducting layer has pores.
[0015] Optionally, the top of the water-conducting layer is covered with a number of permeable holes, and the outer and inner walls of the water-conducting layer are covered with a number of pores of gradually increasing size from top to bottom. The hollow part inside the water-conducting layer is filled with filler, the filler density gradually decreases from top to bottom, and the filler particle size gradually increases from top to bottom.
[0016] Optionally, the root winding sleeve includes an inner protective layer, a middle guiding layer, and an outer winding layer. The inner protective layer is fitted over the outer sheath of the cable and serves as the basic structure of the root winding sleeve. The middle guiding layer contains moisture, and the outer winding layer guides the root winding.
[0017] Optionally, the inner protective layer is made of polyetheretherketone, high-density polyethylene, or polytetrafluoroethylene; the middle induction layer is made of natural-based hydrogel; the outer winding layer includes a PLA mesh, the outer wall of which is provided with biodegradable geotextile, and the outer wall of which is wound with ramie rope arranged in a spiral pattern.
[0018] Optionally, the aluminum alloy conductor is covered with a cross-linked polyethylene insulation layer, the gap inside the water-blocking layer outside the cross-linked polyethylene insulation layer is filled with water-blocking yarn, the water-blocking layer is a water-blocking tape, the isolation layer is a polyethylene waterproof isolation sleeve, and the armor layer is a stainless steel tape.
[0019] A method for laying environmentally friendly aluminum alloy cables includes the following steps:
[0020] S1. Excavate trenches along the cable laying path;
[0021] S2. Place the root sleeves evenly spaced on the cable, and then lay the cable in the trench;
[0022] S3. Backfill the trench. During the backfilling process, place the root canal above the root loop sleeve.
[0023] S4. After backfilling the trench, plant seeds are buried at the top opening of the root canal;
[0024] S5. Water the top of the root canal according to the weather conditions;
[0025] In step S1, the excavation depth of the trench is 1 to 0.4 m.
[0026] In step S3, the root canal can be filled with nutrient soil at the laying site, or it can be filled in advance, sealed with a film, and the film can be removed when the root canal is buried. The root canal is kept at an angle during the burial process.
[0027] The beneficial effects of this invention are:
[0028] This invention combines cable laying with vegetation planting. The roots of the vegetation are guided by perforated tubes and root loops and eventually wrap around the outer wall of the cable. The vegetation stabilizes the cable and the soil at the cable burial site, preventing soil erosion at the cable burial site. This stabilizes the cable and the soil, allowing the cable burial depth to be reduced, which can significantly reduce the amount of cable trench excavation. Furthermore, the growth trajectory of the vegetation can also mark the cable laying trajectory.
[0029] Using aluminum alloy conductors instead of copper conductors in battery cells can reduce material costs by more than 30%. Direct-buried cables with aluminum alloy conductors comply with the new material application direction of "Made in China 2025" and the outer sheath does not release toxic gases or persistent pollutants. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a structural diagram of the present invention;
[0032] Figure 2 This is a diagram of the cable structure.
[0033] Figure 3 This is a diagram of the root-wrapped sleeve structure;
[0034] Figure 4 This is a diagram of the root canal structure;
[0035] Figure 5 This is a diagram of the aquifer structure.
[0036] Reference numerals: 100, cable; 101, aluminum alloy conductor; 102, cross-linked polyethylene insulation layer; 103, water-blocking yarn; 104, water-blocking layer; 105, isolation layer; 106, armor layer; 107, outer sheath; 200, root loop sleeve; 201, inner protective layer; 202, middle induction layer; 203, outer winding layer; 300, through-root canal; 301, inner lining layer; 302, support layer; 303, water-conducting layer; 304, filler. Detailed Implementation
[0037] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.
[0039] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0040] like Figures 1-5 As shown, the present invention discloses an environmentally friendly aluminum alloy cable, comprising, from the inside out, a core layer, a water-blocking layer 104, an isolation layer 105, an armor layer 106, and an outer sheath 107.
[0041] The battery cell layer includes multiple aluminum alloy conductors 101, which are covered with a cross-linked polyethylene insulation layer 102. The gaps inside the water-blocking layer 104 outside the cross-linked polyethylene insulation layer 102 are also filled with water-blocking yarn 103.
[0042] The water-blocking layer 104 is a water-blocking strip, the isolation layer 105 is a polyethylene waterproof isolation sleeve, the armor layer 106 is a stainless steel strip, and the outer protective layer 107 is halogen-free TPU or halogen-free PUR.
[0043] Above the outer protective layer 107, there are multiple root canals 300 buried in the soil. The root canals 300 are arranged vertically and are evenly spaced along the cable 100 laying track. The root canals 300 are arranged at an angle with the vertical, with an angle of 15° between the root canals 300 and the vertical.
[0044] The layered structure of the permeable root canal 300 includes, from the inside out, an inner lining layer 301, a support layer 302, and a water-conducting layer 303. All of these are biodegradable. The support layer 302 forms the skeleton structure of the permeable root canal 300, while the water-conducting layer 303 guides water from the soil surface into the interior of the permeable root canal 300.
[0045] The inner lining layer 301 is made of marisell fiber, while the support layer 302 and the water-conducting layer 303 are made of biodegradable materials such as polylactic acid (PLA) or polyhydroxyalkanoate (PHA). The support layer 302 has a mesh structure, and the inner lining layer 301 is wound around the support layer 302. The water-conducting layer 303 is a cylindrical structure connected to the outside of the support layer 302. The water-conducting layer 303 is hollow inside, and its outer and inner walls are covered with a number of pores. The top of the water-conducting layer 303 is covered with a number of permeable holes, and the pore size on the outer and inner walls of the water-conducting layer 303 gradually increases from top to bottom. The hollow part inside the water-conducting layer 303 is filled with filler 304. The density of the filler 304 gradually decreases from top to bottom, and the particle size of the filler 304 gradually increases from top to bottom, making it easier for water to flow downwards inside the filler 304 and guiding water into the lower part of the root canal 300. The filler 304 can be a biodegradable material.
[0046] A root wrapping sleeve 200 is provided outside the outer sheath 107 at the lower part of the root canal 300. The root wrapping sleeve 200 includes an inner protective layer 201, a middle guiding layer 202, and an outer wrapping layer 203. The inner protective layer 201 is fitted outside the outer sheath 107 of the cable 100 and serves as the basic structure of the root wrapping sleeve 200. It is also used to protect the outer sheath 107 of the cable 100 at the lower part of the root canal 300. The middle guiding layer 202 contains moisture and can guide the root to wrap around the outside of the cable 100. The outer wrapping layer 203 guides the root to wrap.
[0047] The inner protective layer 201 is made of polyetheretherketone, high-density polyethylene or polytetrafluoroethylene, the middle induction layer 202 is a natural-based hydrogel, which can be a microporous calcium alginate hydrogel, and the outer winding layer 203 includes a PLA mesh, the outer wall of which is provided with a biodegradable geotextile, and the outer wall of the geotextile is wound with ramie rope arranged in a spiral pattern.
[0048] Geotextiles prevent soil particles from entering and clogging the mesh. Biodegradable geotextiles are made from natural fibers (such as jute and coconut fiber) or bio-based polymers (such as PLA and PHA) and can be decomposed into water, carbon dioxide and organic matter through microbial action.
[0049] The root canal 300 is filled with nutrient soil, the density of which gradually decreases from top to bottom. The top opening of the root canal 300 is no more than 5 cm from the soil surface, and the bottom opening is no more than 3 cm from the cable 100. Plant seeds are buried above the top opening of the root canal 300, and these seeds are leguminous forage grasses or gramineous energy grasses, etc.
[0050] The permeable root canal 300 guides the plant roots to extend downwards into the cable 100. The permeable root canal 300 is filled with nutrient soil whose density gradually decreases from top to bottom, and the water-conducting layer 303 allows water from the soil surface to enter the depth of the permeable root canal 300. These are all measures to guide the plant roots to extend downwards. The hydrogel inside the root wrapping sleeve 200 can realize a dynamic cycle of water absorption, slow release, reabsorption, and re-slow release. The water induces the plant roots to wrap around the cable 100. The ramie rope arranged in a spiral trajectory outside the root wrapping sleeve 200 guides the plant roots to wrap around the cable 100 along the spiral trajectory. The permeable root canal 300 and the root wrapping sleeve 200 are basically biodegradable materials. They degrade after the plant roots are anchored to the cable 100, without causing any impact on the environment.
[0051] This invention also discloses a method for laying the aforementioned environmentally friendly aluminum alloy cable, comprising the following steps:
[0052] S1. Excavate trenches along the cable laying path;
[0053] S2. Place the root sleeves evenly spaced on the cable, and then lay the cable in the trench;
[0054] S3. Backfill the trench. During the backfilling process, place the root canal above the root loop sleeve.
[0055] S4. After backfilling the trench, plant seeds are buried at the top opening of the root canal;
[0056] S5. Water the top of the root canal according to the weather conditions;
[0057] In step S1, the excavation depth of the trench is 1~0.4m;
[0058] In step S3, the root canal can be filled with nutrient soil at the laying site, or it can be filled in advance, sealed with a film, and the film can be removed when the root canal is buried. The root canal is kept at an angle during the burial process.
[0059] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the technical solutions of the present invention. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of the patent of the present invention.
Claims
1. An environmentally friendly aluminum alloy cable, characterized by, The application relates to a cable with a root-growing pipe. The cable comprises an electric core layer, a water-blocking layer, an isolation layer, an armored layer and an outer protective layer arranged in sequence from inside to outside. A root sleeve is sleeved on the outer protective layer of the cable. The root-growing pipe is arranged in the soil at the upper part of the root sleeve. The electric core layer comprises a plurality of aluminum alloy conductors, the outer protective layer is made of halogen-free TPU or halogen-free PUR, the top of the root-growing pipe is embedded with plant seeds, the root-growing pipe is filled with nutrient soil, and the compactness of the nutrient soil in the root-growing pipe gradually decreases from top to bottom.
2. The environmentally friendly aluminum alloy cable according to claim 1, characterized in that, The top of the root-growing pipe is not more than 5cm away from the surface of the soil, and the bottom of the root-growing pipe is not more than 3cm away from the cable.
3. The environmentally friendly aluminum alloy cable of claim 1, wherein, The root sleeve is arranged on the cable at equal intervals, and the root-growing pipe is arranged in an inclined manner, and the vertical angle between the root-growing pipe and the vertical direction is 15 degrees.
4. The environmentally friendly aluminum alloy cable of claim 1, wherein, The layered structure of the root-growing pipe comprises an inner lining layer, a support layer and a water guide layer from inside to outside, and the three layers are all made of degradable materials.
5. The environmentally friendly aluminum alloy cable of claim 4, wherein, The support layer is the skeleton structure of the root-growing pipe, and the water guide layer guides the water on the surface of the soil into the interior of the root-growing pipe.
6. The environmentally friendly aluminum alloy cable of claim 5, wherein, The inner lining layer is made of jute fiber, the support layer and the water guide layer are made of polylactic acid or polyhydroxyalkanoate, the support layer is a net structure, the inner lining layer is wound on the support layer, the water guide layer is a cylindrical structure connected to the outside of the support layer, the interior of the water guide layer is hollow, and the water guide layer is provided with apertures.
7. The environmentally friendly aluminum alloy cable of claim 1, wherein, The top of the water guide layer is provided with a plurality of water-permeable holes, the outer and inner sidewalls of the water guide layer are provided with a plurality of apertures with gradually increasing sizes from top to bottom, the interior of the water guide layer is filled with fillers, the density of the fillers gradually decreases from top to bottom, and the particle size of the fillers gradually increases from top to bottom.
8. The environmentally friendly aluminum alloy cable of claim 7, wherein, The root sleeve comprises an inner protective layer, a middle induction layer and an outer winding layer, the inner protective layer is sleeved on the outer protective layer of the cable, the inner protective layer serves as the basic structure of the root sleeve, the middle induction layer contains moisture, and the outer winding layer guides the root stem to wind.
9. The environmentally friendly aluminum alloy cable according to any one of claims 1 to 8, characterized in that, The inner protective layer is made of polyether ether ketone, high-density polyethylene or polytetrafluoroethylene material, the middle induction layer is a natural-based hydrogel, and the outer winding layer comprises a net made of PLA material, the outer wall of the net is provided with degradable geotextile, and the outer wall of the geotextile is wound with ramie ropes arranged in a spiral track.
10. A method of laying an environmentally friendly aluminium alloy cable as claimed in any one of claims 1 to 9, characterised in that, The aluminum alloy conductor is coated with a cross-linked polyethylene insulation layer, the inner side gap of the water-blocking layer outside the cross-linked polyethylene insulation layer is filled with water-blocking yarn, the water-blocking layer is a water-blocking tape, the isolation layer is a polyethylene waterproof isolation sleeve, and the armored layer is a stainless steel tape. The application further discloses a root-growing pipe cable laying method. S1. A trench is excavated along the cable laying track. S2. The root sleeve is sleeved on the cable at equal intervals, and then the cable is laid in the trench. S3. The trench is backfilled, and in the backfilling process, the root-growing pipe is embedded above the root sleeve. S4. After the trench is backfilled, plant seeds are filled and embedded at the top of the root-growing pipe. S5. The top of the root-growing pipe is watered according to the weather condition. In the step S1, the trench is excavated to a depth of 1-0.4m. In the step S3, the nutrient soil in the root-growing pipe can be filled on site, or the root-growing pipe can be filled with the nutrient soil in advance, the nutrient soil is packaged by a film, and the film is removed when the root-growing pipe is embedded, and the root-growing pipe is kept inclined during the embedding process.