1kv and below aluminum alloy core polypropylene insulation anti-extrusion type flexible cable

Abstract

The utility model discloses a 1kV and below aluminum alloy core polypropylene insulation anti -extrusion type flexible cable, including functional type optical cable, a plurality of solid filling parts of setting in the functional type optical cable outside, the wrapping of setting in the functional type optical cable, solid filling part outside, the buffer layer of setting in the wrapping outer wall, the outer sheath layer of setting in the buffer layer outer wall, the utility model has the beneficial effects that: through adopting the aluminum alloy conductor that meets the requirement of the 5th soft conductor in GB / T3956-2008, its single wire diameter is small, and the conductor softness is improved significantly, and it is beneficial to cable bending, and it is adapted to the repeated bending scene, simultaneously, the solid filling part adopts polyurethane material, and the outer sheath layer adopts polyurethane elastomer material, and both have excellent anti -extrusion, distortion resistance, can protect the internal structure under the action of external force and not be damaged, solve the problem that traditional cable anti -extrusion and softness are difficult to give consideration to.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, specifically relating to a 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable. Background Technology

[0002] In the field of low-voltage power distribution and intelligent monitoring transmission and distribution at 1kV and below, cables need to be able to adapt to complex operating environments for a long time. Existing cables have many performance defects and cannot meet the actual application requirements. Imbalance between compression resistance and flexibility: Some cables use rigid sheaths or filler materials to improve compression resistance, which reduces cable flexibility and increases bending radius, making them unsuitable for wiring in narrow spaces or scenarios requiring frequent bending; while cables that emphasize flexibility often use soft fillers and sheaths, which are prone to structural deformation under external compression, and may even cause damage to internal conductors or monitoring components, affecting power supply stability and the reliability of monitoring data transmission.

[0003] The contradiction between manufacturing cost and weight: Traditional cables often use cross-linked polyethylene as insulation material. Although it has good insulation performance, it requires a cross-linking process, which prolongs the production cycle and increases energy consumption and manufacturing costs. At the same time, some cables use high-density metals or polymer materials to ensure structural strength, resulting in a large overall weight of the cable, which increases the difficulty of construction and handling and installation costs. Limited functionality and lack of comprehensive protection: Most existing cables used for intelligent monitoring transmission and distribution lines only possess basic conductivity and insulation functions, without specialized protective structures designed for key risks in actual scenarios. On the one hand, they lack fire-resistant and flame-retardant layers, making them prone to rapid combustion and the release of toxic gases in fire or high-temperature environments, which not only interrupts power supply but also exacerbates safety hazards. On the other hand, they lack electromagnetic shielding layers, allowing external electromagnetic signals to easily penetrate the cable in environments with dense industrial equipment or strong electromagnetic interference, interfering with the stability of conductor power supply and the accuracy of monitoring data transmission in functional optical cables. Simultaneously, the electromagnetic radiation generated by the cable itself may also interfere with surrounding sensitive equipment. Furthermore, the lack of buffer structures means that in environments with frequent vibration or impact, the cable is prone to problems such as sheath cracking and insulation aging due to long-term fatigue stress accumulation, shortening its service life.

[0004] Insufficient protection of monitoring components: Intelligent monitoring transmission and distribution lines often integrate monitoring components such as optical cables. The protection of optical cables in existing cables only relies on the basic filling material. This type of filling is mostly ordinary elastic material with limited resistance to torsion and compression. When the cable is subjected to external force, the optical cable is prone to breakage or signal attenuation, resulting in the failure of monitoring function and the inability to achieve real-time and effective monitoring of the line operation status. Utility Model Content

[0005] The purpose of this utility model is to provide a 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable, which achieves compression resistance and flexibility through optimized structural design.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable, comprising... Functional optical cable; Multiple solid fillers are located on the outside of the functional optical cable; The wrapping tape is placed on the outside of the solid filler part of the functional optical cable; A buffer layer is installed on the outer wall of the strap; The outer sheath layer is installed on the outer wall of the buffer layer.

[0007] Preferably, the functional optical cable includes a conductor and an insulating layer disposed on the outside of the conductor.

[0008] Preferably, the functional optical cable further includes a fire-resistant and flame-retardant layer disposed on the outer wall of the conductor, and a shielding layer disposed between the fire-resistant and flame-retardant layer and the insulation layer.

[0009] Preferably, the thickness of the shielding layer is greater than the thickness of the fire-resistant and flame-retardant layer, and the thickness of the shielding layer is less than the thickness of the insulating layer.

[0010] Preferably, the buffer layer is nitrile rubber, and the thickness of the buffer layer is 0.8-1.2 mm.

[0011] Preferably, the outer sheath layer is a polyurethane elastomer, and the thickness of the outer sheath layer is greater than the thickness of the buffer layer.

[0012] Preferably, the thickness of the buffer layer is greater than the thickness of the wrapping tape, and the thickness of the functional optical cable is the same as the thickness of the solid filler portion.

[0013] Compared with the prior art, the beneficial effects of this utility model are: By using aluminum alloy conductors that meet the requirements of the fifth type of soft conductor in GB / T3956-2008, the small diameter of the single wire significantly improves the conductor's flexibility, making the cable easier to bend and suitable for repeated bending scenarios. At the same time, the solid filling part is made of polyurethane material and the outer sheath is made of polyurethane elastomer material. Both of them have excellent resistance to compression and torsion, which can protect the internal structure from damage under external force, thus solving the problem that traditional cables cannot achieve both compression resistance and flexibility. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model; In the diagram: 1. Conductor; 2. Insulation layer; 3. Solid filler; 4. Wrapping tape; 5. Outer sheath layer; 6. Buffer layer; 7. Fire-resistant and flame-retardant layer; 8. Shielding layer. Detailed Implementation

[0015] Please see Figure 1 and Figure 2 This utility model provides a 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable, including... Functional optical cable; Multiple solid filling portions 3 are disposed on the outside of the functional optical cable; The wrapping tape 4 is placed on the outside of the functional optical cable and the solid filling part 3; The buffer layer 6 is provided on the outer wall of the strap 4; The outer sheath layer 5 is installed on the outer wall of the buffer layer 6. This multi-layered nested structure constructs a comprehensive protection system from the inside out. Multiple solid filler parts 3 can form a surrounding support for the functional optical cable, preventing the optical cable from being directly subjected to external force compression. The wrapping tape 4 can integrate the functional optical cable and the solid filler parts 3 into a stable internal unit, preventing misalignment and loosening of the various structures during use. The buffer layer 6 can absorb external impact and vibration energy, reducing fatigue damage to the internal structure caused by long-term stress. The outer sheath layer 5 is made of polyurethane elastomer, which serves as the outermost protective structure of the cable and can resist damage such as external compression, friction, and environmental corrosion. The high toughness and flexibility of the polyurethane elastomer can ensure the normal operation of the cable under external force environment, while not affecting the cable bending performance, making it suitable for use scenarios with external force.

[0016] In this embodiment, preferably, the functional optical cable includes a conductor 1, which is the core conductive component of the cable, providing a stable current transmission channel for the line and ensuring the power supply requirements of 1kV and below transmission and distribution lines. An insulation layer 2 is set on the outside of the conductor 1, which tightly wraps the conductor 1 and can effectively block the electrical connection between the conductor 1 and the external structure, avoiding electrical faults such as leakage and short circuit, ensuring the safety and stability of the cable's conduction process, and allowing the functional optical cable to have both conductivity and basic insulation protection capabilities.

[0017] In this embodiment, preferably, the functional optical cable further includes a fire-resistant and flame-retardant layer 7 disposed on the outer wall of the conductor 1, and a shielding layer 8 disposed between the fire-resistant and flame-retardant layer 7 and the insulation layer 2. The fire-resistant and flame-retardant layer 7 is directly attached to the outer wall of the conductor 1, and can prevent flames from attacking the conductor 1 in the early stage of local high temperature or fire, so as to prevent the conductor 1 from losing its conductivity due to high temperature damage. The shielding layer 8 is located between the fire-resistant and flame-retardant layer 7 and the insulation layer 2, and can block the influence of external electromagnetic interference signals on the current transmitted by the conductor 1, while preventing the electromagnetic radiation generated by the conductor 1 itself from interfering with the surrounding equipment, thereby improving the signal stability and anti-interference ability of the cable in complex electromagnetic environment.

[0018] In this embodiment, preferably, the thickness of the shielding layer 8 is greater than the thickness of the fire-resistant and flame-retardant layer 7, and the thickness of the shielding layer 8 is less than the thickness of the insulation layer 2. The greater thickness of the shielding layer 8 than the fire-resistant and flame-retardant layer 7 ensures that it has sufficient shielding area and shielding strength, more effectively blocking electromagnetic interference and ensuring signal transmission quality. The smaller thickness of the shielding layer 8 than the insulation layer 2 avoids the overall diameter of the functional optical cable from increasing and reducing its flexibility due to an excessively thick shielding layer. At the same time, it ensures that the insulation layer 2 has sufficient thickness to undertake the main insulation protection function, preventing electrical safety hazards caused by an excessively thin insulation layer, and balancing anti-interference performance, insulation performance and optical cable structure compactness.

[0019] In this embodiment, preferably, the buffer layer 6 is made of nitrile rubber, and the thickness of the buffer layer 6 is 0.8-1.2mm. Nitrile rubber itself has excellent elasticity, oil resistance and wear resistance. As a buffer layer 6, it can efficiently absorb external impact and vibration energy, reduce fatigue damage caused by long-term vibration of the wrapping tape 4 and internal functional optical cable and solid filling part 3, and extend the service life of the cable. The thickness setting of 0.8-1.2mm can ensure that the buffer layer 6 has sufficient deformation space to achieve a good buffering effect, and can also avoid the overall outer diameter of the cable from increasing due to excessive thickness, without affecting the wiring flexibility in narrow spaces, and adapting to various installation scenarios.

[0020] In this embodiment, preferably, the thickness of the outer sheath layer 5 is greater than the thickness of the buffer layer 6, which can ensure that it has sufficient structural strength and protective thickness to cope with wear and compression under long-term outdoor or complex working conditions. At the same time, the flexibility of the polyurethane elastomer will not affect the overall bending performance of the cable, meeting the usage requirements of repeated bending scenarios.

[0021] In this embodiment, preferably, the thickness of the buffer layer 6 is greater than the thickness of the wrapping tape 4, and the thickness of the functional optical cable is the same as the thickness of the solid filler 3, thereby improving the overall structural stability and installation convenience of the cable.

[0022] Conductor 1 is made of aluminum alloy that meets the requirements of the fifth type of soft conductor in GB / T3956-2008. As the core conductive component of the cable, it provides a stable current transmission channel for 1kV and below transmission and distribution lines, ensuring the power supply needs of the lines. In addition, the small diameter of the single wire of the aluminum alloy conductor can improve the conductor's softness, which is conducive to cable bending and suitable for the application environment that requires repeated bending. The insulation layer 2 is made of polypropylene insulation material, which tightly wraps the conductor 1 and can block the electrical connection between the conductor 1 and the external structure, preventing electrical faults such as leakage and short circuit. At the same time, polypropylene has a low density, which can reduce the overall weight of the cable. Moreover, it does not need to undergo a cross-linking process after extrusion, which can reduce manufacturing costs and improve production efficiency.

[0023] The solid filling part 3 is made of polyurethane material and is distributed around the functional optical cable to form a surrounding support and compression protection for the functional optical cable. Utilizing the excellent compression resistance and torsion resistance of polyurethane, the functional optical cable can be prevented from being damaged by external forces, while maintaining the stability of the internal structure of the cable and preventing the internal components from shifting. The wrapping tape 4 uses conventional cable wrapping materials such as polyester tape or non-woven tape to tightly wrap and integrate the functional optical cable and multiple solid filling parts 3 into a unified internal unit, preventing misalignment and loosening of the various structures during use, improving the overall integrity of the internal structure of the cable, and providing a flat attachment base for the outer buffer layer 6 to ensure that the buffer layer 6 can fit tightly. The fire-resistant and flame-retardant layer 7 uses conventional fire-resistant and flame-retardant materials such as mica tape or flame-retardant wrapping tape, which can block flames and high-temperature attacks, prevent the spread of flames in fire or high-temperature environments, protect the conductivity of conductor 1 and the overall structure of the cable, avoid cable failure due to high temperature, and improve the safety performance of the cable in dangerous environments. The shielding layer 8 uses conventional electromagnetic shielding materials such as copper wire braided layer or aluminum-plastic composite tape, and is located between the fire-resistant and flame-retardant layer 7 and the insulation layer 2. It can block the influence of external electromagnetic interference signals on the current transmitted by conductor 1, and at the same time prevent the electromagnetic radiation generated by conductor 1 itself from interfering with surrounding equipment, ensuring the signal stability and power supply reliability of the cable in complex electromagnetic environment, and ensuring accurate monitoring data transmission and continuous and stable power supply.

[0024] The working principle and usage process of this utility model are as follows: Based on the usage requirements, the application scenario is confirmed to be a 1kV and below transmission and distribution line, and there are risks of external extrusion, repeated bending or complex electromagnetic / high temperature, to ensure that the cable performance matches the scenario requirements. According to the planned route, the cable is laid out. Taking advantage of the high softness and good flexibility of aluminum alloy conductors, it can flexibly adapt to narrow spaces or installation environments that require repeated bending, and avoid excessive pulling during the laying process, which may cause damage to the cable structure. Connect cable conductor 1 to the corresponding power transmission and distribution equipment terminal to ensure a firm connection. During this process, rely on the insulation protection of insulation layer 2 to avoid the risk of leakage or short circuit during wiring. After completion, check whether the connection is stable. Connect the power supply to the line and verify whether the current transmission of conductor 1 is stable; at the same time, check the monitoring data transmission of the functional optical cable to confirm whether the shielding layer 8 effectively blocks electromagnetic interference and ensures accurate data transmission.

Claims

1. A 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable, characterized in that: include Functional optical cable; Multiple solid filling portions (3) are set on the outside of the functional optical cable; The wrapping tape (4) is placed on the outside of the functional optical cable and the solid filling part (3); A buffer layer (6) is provided on the outer wall of the strap (4); The outer sheath (5) is set on the outer wall of the buffer layer (6).

2. The 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable according to claim 1, characterized in that: The functional optical cable includes a conductor (1) and an insulation layer (2) disposed on the outside of the conductor (1).

3. The 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable according to claim 2, characterized in that: The functional optical cable also includes a fire-resistant and flame-retardant layer (7) disposed on the outer wall of the conductor (1), and a shielding layer (8) disposed between the fire-resistant and flame-retardant layer (7) and the insulation layer (2).

4. The 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable according to claim 3, characterized in that: The thickness of the shielding layer (8) is greater than the thickness of the fire-resistant and flame-retardant layer (7), and the thickness of the shielding layer (8) is less than the thickness of the insulating layer (2).

5. A 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable according to claim 1, characterized in that: The buffer layer (6) is made of nitrile rubber, and the thickness of the buffer layer (6) is 0.8-1.2 mm.

6. The 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable according to claim 1, characterized in that: The outer sheath layer (5) is a polyurethane elastomer, and the thickness of the outer sheath layer (5) is greater than the thickness of the buffer layer (6).

7. A 1kV and below aluminum alloy core polypropylene insulated compression-resistant flexible cable according to claim 1, characterized in that: The thickness of the buffer layer (6) is greater than the thickness of the wrapping tape (4), and the thickness of the functional optical cable is the same as the thickness of the solid filler (3).

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