Aluminum alloy conductor steel tape armored cable

Abstract

The utility model relates to an aluminum alloy conductor steel tape armored cable, which sequentially comprises an outer sheath, a steel tape armored layer, an inner cushion layer and at least three single-core cables arranged in a circumferential array mode from outside to inside, and filling bodies are arranged in fan-shaped areas formed between the single-core cables and the inner cushion layer. The filling body comprises a filling pad and a framework combined with the filling pad, the framework comprises a framework main body and a supporting part formed on the framework main body, the supporting part is arranged between the two single-core cables and abuts against the outer parts of the single-core cables, the framework main body is combined with the filling pad, and the framework enables a plurality of channel holes to be formed between the filling body and the single-core cables. The aluminum alloy conductor steel tape armored cable provided by the utility model can effectively resist deformation caused by external pressure and internal thermal expansion, improve roundness and anti-extrusion performance of the cable, and ensure long-term structural stability of the cable core.

Description

Technical Field

[0001] This utility model relates to mining cables, and more particularly to an aluminum alloy conductor steel tape armored cable. Background Technology

[0002] Armored cables consist of conductors of different materials encased in an insulating metal sheath, forming a flexible yet robust assembly. Common types include steel tape armored cables, fine steel wire armored cables, and coarse steel wire armored cables. Among these, aluminum alloy conductor steel tape armored cables exhibit outstanding performance across multiple dimensions. For example, aluminum alloy conductors offer superior conductivity compared to pure aluminum, and they demonstrate excellent tensile strength, elongation, and bending performance. The steel tape armor layer enhances the cable's mechanical strength, enabling it to withstand greater pressure and external mechanical forces.

[0003] Currently, aluminum alloy conductor steel tape armored cables have certain shortcomings in the design of the steel tape wrapping structure and the filler structure, resulting in insufficient pressure resistance, impact resistance and stability of the cables. During use, their roundness is easily damaged, and even the service life and reliability of the cables are affected. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an aluminum alloy conductor steel tape armored cable with good pressure resistance, impact resistance and stability.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A key technology of an aluminum alloy conductor steel tape armored cable is that it comprises, from the outside to the inside, an outer sheath, a steel tape armor layer, an inner padding layer, and at least three single-core cables arranged in a circumferential array, wherein a filler is provided in the fan-shaped area formed between the single-core cables and the inner padding layer.

[0007] The filler includes a filling pad and a skeleton attached thereto. The skeleton includes a skeleton body and a support member formed on the skeleton body. The support member is placed between two single-core cables and abuts against the outside of the single-core cables. The skeleton body is attached to the filling pad, and the skeleton forms multiple channel holes between the filler and the single-core cables.

[0008] In one embodiment of this utility model, the skeleton has a cross-shaped structure, which includes a central column and four peripheral columns distributed around the central column. The four peripheral columns are fixedly connected to the central column through connecting plates, and the column closest to the single-core cable is the supporting component.

[0009] In one embodiment of this utility model, the central column and / or the peripheral column are hollow tubular structures.

[0010] In one embodiment of this utility model, the four outer pillars have the same diameter and are arranged in a circular array around the central pillar.

[0011] In one embodiment of this utility model, the steel strip armor layer is made by wrapping corrugated steel strip with gaps, and the width of the wrapping gap is less than 1 / 3 of the width of the corrugated steel strip.

[0012] In one embodiment of this utility model, the steel strip armor layer further includes a straight steel strip that is wrapped around the corrugated steel strip with gaps. The straight steel strip is located outside the corrugated steel strip and covers the wrapping gaps of the corrugated steel strip.

[0013] In one embodiment of this utility model, the single-core cable comprises, from the outside to the inside, a metal shielding layer, an insulating shielding layer, an insulating layer, a conductor shielding layer, and an aluminum alloy conductor.

[0014] In one embodiment of this utility model, the filling pad is made of water-resistant and expanding material or thermally conductive silicone elastomer, and the skeleton is made of high-strength, high-modulus polymer extrusion molding.

[0015] The beneficial effects of adopting the above technical solution are as follows:

[0016] The aluminum alloy conductor steel tape armored cable provided by this utility model has a filler body structure that combines a skeleton and a filler pad. The skeleton serves as the core support component, while the filler pad covers the skeleton and provides auxiliary support. The rigid skeleton provides strong support, effectively resisting deformation caused by external pressure and internal thermal expansion, improving the cable's roundness and compression resistance, and ensuring long-term structural stability of the cable core. The support components of the skeleton abut against the outside of two adjacent single-core cables, facilitating positioning. Multiple channels are formed between the filler body and the single-core cables, saving material and reducing cable weight. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the filler of this utility model.

[0020] Figure 4 This is a structural schematic diagram of the steel strip armor layer of this utility model.

[0021] Wherein: 1 outer sheath, 2 steel tape armor layer, 2-1 corrugated steel tape, 2-2 flat steel tape, 3 inner cushion layer, 4 filling pad, 5 skeleton, 5-1 first cylinder, 5-2 central cylinder, 5-3 connecting plate, 5-4 second cylinder, 5-5 third cylinder, 6 metal shielding layer, 7 insulation shielding layer, 8 insulation layer, 9 conductor shielding layer, 10 aluminum alloy conductor, 11 channel hole. Detailed implementation manners

[0022] To make the purpose, technical solutions and advantages of the present utility model clearer, the following describes the utility model clearly and completely in conjunction with specific embodiments.

[0023] As Figure 1 and 2 shown in an aluminum alloy conductor steel tape armored cable, which sequentially includes an outer sheath 1, a steel tape armor layer 2, an inner cushion layer 3 and at least three single-core cables arranged in a circumferential array from outside to inside. A filling body is arranged in the fan-shaped area formed between the single-core cables and the inner cushion layer 3; the embodiment shown in the figure is three single-core cables arranged in a circumferential array. The single-core cable sequentially includes a metal shielding layer 6, an insulation shielding layer 7, an insulation layer 8, a conductor shielding layer 9 and an aluminum alloy conductor 10 from outside to inside.

[0024] The filling body includes a filling pad 4 and a skeleton 5 combined with it. The skeleton 5 includes a skeleton main body and a supporting component formed on the skeleton main body. The supporting component is placed between two single-core cables and abuts against the outside of the single-core cable. The skeleton main body is combined with the filling pad 4. The skeleton 5 forms a plurality of channel holes 11 between the filling body and the single-core cable. Among them, the skeleton 5 is the core supporting component, and the filling pad 4 is wrapped around the periphery of the skeleton to play an auxiliary supporting role. The rigid skeleton 5 provides strong support force, effectively resisting deformation caused by external pressure of the cable and internal thermal expansion. The channel holes 11 can save materials and reduce the weight of the cable. The skeleton 5 can adopt a "rice" shape, an "I" shape or a "cross" shape structure.

[0025] As Figures 1 to 3As shown, in this embodiment, the skeleton 5 has a cross-shaped structure, including a central column 5-2 and four peripheral columns distributed around the central column 5-2. The four peripheral columns are fixedly connected to the central column 5-2 through connecting plates 5-3. The column closest to the single-core cable serves as the support component. The four peripheral columns include a first column 5-1 serving as the support component, a second column 5-4 symmetrically arranged with respect to the first column, and third columns 5-5 symmetrically arranged on the left and right sides of the central column 5-2. The first column 5-1 abuts against the two internal single-core cables, the second column 5-4 and the filling pad 4 support the steel strip armor layer 2, and the two third columns 5-5 abut against adjacent single-core cables respectively, forming multi-point support between the skeleton 5 and the internal single-core cables, creating a strong supporting force. Simultaneously, the channel hole 11 is formed under the action of the third columns 5-5 and the connecting plates 5-3.

[0026] As a further improvement, the central column 5-2 and / or the outer columns are hollow tubular structures, which can further save materials and reduce weight while ensuring the structural strength of the skeleton 5.

[0027] Preferably, the four outer columns have the same diameter and are arranged in a circular array around the central column 5-2, which makes production and processing more convenient, and any one of the outer columns can serve as a supporting component of the skeleton.

[0028] The filling pad 4 is made of water-resistant and expandable material or thermally conductive silicone elastomer, such as sodium acrylate copolymer, neutral (meth)acrylate copolymer, etc., and the skeleton 5 is made of high-strength, high-modulus polymer extrusion molding, such as PBT or modified nylon. The filling pad 4 covers the outside of the skeleton 5.

[0029] like Figure 1 and Figure 4 As shown, the steel tape armor layer 2 is formed by intermittently wrapping corrugated steel tape 2-1, with the wrapping gap width L2 being less than 1 / 3 of the width L1 of the corrugated steel tape 2-1. The corrugated steel tape 2-1 enhances the impact resistance of the steel tape armor layer 2 and improves the bending performance of the cable. In this embodiment, the steel tape armor layer 2 also includes a straight steel tape 2-2 with intermittent wrapping. The straight steel tape 2-2 is located outside the corrugated steel tape 2-1 and covers the wrapping gap of the corrugated steel tape 2-1. This further enhances the impact resistance of the steel tape armor layer 2, effectively resists deformation caused by external pressure and internal thermal expansion, improves the roundness and compression resistance of the cable, and ensures the long-term structural stability of the cable core. As another embodiment, the steel tape armor layer 2 can also be formed by intermittently wrapping two layers of straight steel tape.

[0030] In this embodiment, the outer sheath 1 is the outermost protective structure of the cable and can be made of polymer materials such as polyvinyl chloride (PVC), polyethylene (PE), and cross-linked polyethylene (XLPE). The corrugated steel strip 2-1 and the straight steel strip 2-2 can be made of low-carbon steel strip, which has good plasticity and toughness, is easy to process into the required shape, and has a relatively low cost. The inner padding layer 3 is located between the steel strip armor layer 2 and the filler, mainly serving as an isolation and buffer. It can be made of polyvinyl chloride (PVC) strip, polyethylene (PE) strip, or non-woven fabric, which have good flexibility and insulation properties. The metal shielding layer 6 mainly serves as electromagnetic shielding, confining the electric field inside the cable within a certain range and preventing the electromagnetic energy inside the cable from radiating outwards and interfering with the normal operation of other surrounding electrical equipment. It can be made of materials such as copper strip or copper wire braided mesh. The insulating shielding layer 7 is located between the insulating layer 8 and the metal shielding layer 6. Its main function is to make the electric field distribution between the insulating layer 8 and the metal shielding layer 6 more uniform, preventing the insulation layer from being broken down due to electric field concentration. Semi-conductive polyvinyl chloride (PVC) or semi-conductive polyethylene (PE) can be used. The insulating layer 8 is a crucial structure in a single-core cable, used to isolate the conductor from surrounding structures, preventing short-circuit faults between conductors or between the conductor and the shielding layer, ensuring safe and reliable transmission of power or signals. Cross-linked polyethylene (XLPE) or similar materials can be used. The conductor shielding layer 9 wraps around the aluminum alloy conductor, mainly to eliminate electric field concentration caused by burrs, protrusions, and other defects on the conductor surface, making the electric field distribution between the conductor and the insulating layer more uniform, thereby improving the cable's insulation performance and operational reliability. Semi-conductive paper, semi-conductive rubber, or semi-conductive plastics can be used.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aluminum alloy conductor steel tape armored cable, characterized in that, It consists of an outer sheath (1), a steel strip armor layer (2), an inner padding layer (3), and at least three single-core cables arranged in a circumferential array from the outside to the inside. A filler is provided in the fan-shaped area formed between the single-core cable and the inner padding layer (3). The filler includes a filling pad (4) and a skeleton (5) attached thereto. The skeleton (5) includes a skeleton body and a support member formed on the skeleton body. The support member is placed between two single-core cables and abuts against the outside of the single-core cables. The skeleton body is attached to the filling pad (4). The skeleton (5) forms multiple channel holes (11) between the filler and the single-core cables.

2. The aluminum alloy conductor steel tape armored cable according to claim 1, characterized in that, The frame (5) has a cross-shaped structure, including a central column (5-2) and four peripheral columns distributed around the central column (5-2). The four peripheral columns are fixedly connected to the central column (5-2) through a connecting plate (5-3). The column closest to the single-core cable is the supporting component.

3. The aluminum alloy conductor steel tape armored cable according to claim 2, characterized in that, The central column (5-2) and / or the outer columns are hollow tubular structures.

4. The aluminum alloy conductor steel tape armored cable according to claim 2, characterized in that, The four outer pillars have the same diameter and are arranged in a circular array around the central pillar (5-2).

5. An aluminum alloy conductor steel tape armored cable according to any one of claims 1-4, characterized in that, The steel strip armor layer (2) is wrapped with corrugated steel strip (2-1) with gaps, and the width of the wrapping gap is less than 1 / 3 of the width of the corrugated steel strip (2-1).

6. The aluminum alloy conductor steel tape armored cable according to claim 5, characterized in that, The steel strip armor layer (2) also includes a straight steel strip (2-2) with gap wrapping. The straight steel strip (2-2) is located outside the corrugated steel strip (2-1) and covers the wrapping gap of the corrugated steel strip (2-1).

7. The aluminum alloy conductor steel tape armored cable according to claim 1, characterized in that, The single-core cable comprises, from the outside to the inside, a metal shielding layer (6), an insulating shielding layer (7), an insulating layer (8), a conductor shielding layer (9), and an aluminum alloy conductor (10).

8. The aluminum alloy conductor steel tape armored cable according to claim 1, characterized in that, The filling pad (4) is made of water-resistant and expanding material or thermally conductive silicone elastomer, and the skeleton (5) is made of high-strength, high-modulus polymer extrusion molding.

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