Low-voltage cable with flame-retardant structure

Abstract

The utility model discloses a low -voltage cable with flame -retardant structure relates to cable field, including cable body, the cable body outside is equipped with fixed component, the fixed component includes ring, a plurality of fixed insertion stem is fixed with outside ring, the fixed insertion stem is hollow, and the fixed insertion stem end part is equipped with the pass opening, when the cable body is buried into the ground, a plurality of fixed insertion stem can insert the inside of soil, ensure that the cable body does not move or rotate in the operation process because of external force, improve the stability of cable body, and the fixed component is provided with a plurality of, and a plurality of fixed components are equidistance distribution along the length direction of cable body, and the distribution mode can ensure that cable can be supported and fixed evenly in the full length range.

Description

Technical Field

[0001] This utility model relates to the field of cables, and in particular to a low-voltage cable with a flame-retardant structure. Background Technology

[0002] With the continuous development of power systems and the acceleration of urbanization, cables are being used more and more widely in power transmission and distribution. Especially in underground environments, cables need to withstand complex external conditions, such as soil pressure, groundwater erosion, mechanical vibration, and potential external impacts.

[0003] Traditional cable laying methods typically rely on simple fixing devices, such as cable clamps or binding straps. These devices can secure cables to a certain extent, but their stability and reliability are often insufficient in complex underground environments.

[0004] Therefore, it is necessary to propose a low-voltage cable with a flame-retardant structure to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a low-voltage cable with a flame-retardant structure to solve the problem that traditional cable laying methods usually rely on simple fixing devices, such as cable clamps or binding straps. These devices can fix the cable to a certain extent, but their stability and reliability are often insufficient in complex underground environments.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-voltage cable with a flame-retardant structure, comprising a cable body, wherein a fixing component is sleeved on the outer side of the cable body; The fixing component includes a ring sleeve, and a plurality of fixing rods are fixed on the outside of the ring sleeve. The fixing rods are hollow and have openings at their ends. The cable body includes: A triangular block, wherein three sides of the triangular block are concave inward, and each of the three concave areas is provided with a battery cell, and the battery cell is wrapped with an insulating layer. A flame-retardant layer, which wraps around the outside of the triangular block and the insulating layer; A metal shielding layer is disposed on the outside of the flame-retardant layer.

[0007] Preferably, the triangular blocks are elastic and distributed along the length of the cable body.

[0008] Preferably, a sheath layer is extruded on the outside of the metal shielding layer, and an intumescent flame retardant is added inside the sheath layer.

[0009] Preferably, a fixing screw is provided on the outer side of the ring sleeve, and one end of the fixing screw is pressed against the outer side of the ring sleeve.

[0010] Preferably, the end of the fixing rod away from the cable body is tapered, and the tip of the tapered rod is oriented towards the end away from the cable body;

[0011] Multiple fixing components are provided, and the multiple fixing components are distributed at equal distances along the length of the cable body.

[0012] Preferably, the outer side of the insulating layer is wrapped with a nano-aerogel insulating layer.

[0013] The technical effects and advantages of this utility model are as follows: 1. The triangular blocks are elastic and can be evenly distributed along the length of the cable body. This elastic design helps to buffer stress through its own deformation when the cable is subjected to external force, protecting the internal battery core from damage. At the same time, it can prevent the battery core from tangling together, playing a role in blocking and isolating.

[0014] 2. When the cable body is buried underground, multiple fixed plugs can be inserted into the soil to ensure that the cable body will not move or rotate due to external forces during operation, thereby improving the stability of the cable body.

[0015] Multiple fixing components are provided, and these components are evenly distributed along the length of the cable body. This distribution method ensures that the cable is uniformly supported and fixed throughout its entire length, avoiding problems such as bending, twisting, or displacement of the cable during operation due to insufficient local fixing.

[0016] 3. The main function of the sheath layer is to protect the cable from external mechanical damage, chemical corrosion and environmental influences. The intumescent flame retardant can form a dense carbonized layer at high temperatures, which plays a role in heat insulation and flame retardancy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the low-voltage cable with flame-retardant structure according to this utility model.

[0018] Figure 2 This is an enlarged schematic diagram of point A in section 1 of the present invention.

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

[0020] In the diagram: 1. Cable body; 2. Fixing assembly; 3. Ring; 4. Fixing screw; 5. Fixing plug; 6. Through port; 7. Battery core; 8. Insulation layer; 9. Triangular block; 10. Flame retardant layer; 11. Metal shielding layer; 12. Sheath layer; 13. Intumescent flame retardant. Detailed Implementation

[0021] This utility model provides, for example Figures 1-3The low-voltage cable with a flame-retardant structure shown includes a cable body 1, which comprises: Triangular block 9 has three inwardly recessed sides, and each of the three recesses houses a battery core 7, which is wrapped with an insulating layer 8. The three recesses of triangular block 9 can each accommodate a battery core 7. Triangular block 9 itself is elastic and can be evenly distributed along the length of the cable body 1. This elastic design helps to buffer stress through its own deformation when the cable is subjected to external force, protecting the internal battery cores 7 from damage. It also prevents the battery cores 7 from tangling together, thus serving as a barrier and isolation mechanism.

[0022] Flame retardant layer 10 is wrapped around the outside of triangular block 9 and insulation layer 8. Flame retardant layer 10 is made of ceramicized silicone rubber composite material. Its components include, by weight, 60-80 parts of silicone rubber matrix, 20-40 parts of ceramicized filler, and 5-15 parts of flame retardant synergist. When the cable body 1 is exposed to high temperature or fire, flame retardant layer 10 can effectively prevent the spread of fire and protect the internal structure of the cable from damage.

[0023] This is the conductive part of the cable, used to transmit current. Each cell 7 is wrapped in an insulation layer 8 to ensure electrical insulation performance. Cells 7 are typically made of highly conductive metallic materials (such as copper or aluminum) to ensure efficient current transmission.

[0024] A metal shielding layer 11 is disposed outside the flame-retardant layer 10. The metal shielding layer 11 is a combination structure of a copper wire braided layer and an aluminum-plastic composite tape. The metal shielding layer is used to shield electromagnetic interference and ensure the electrical performance of the cable. The insulation layer 8 is wrapped with a nano-aerogel insulating tape with a corrugated uneven structure on its surface. Specifically, the insulation layer 8 is coated with a pyrolysis heat-absorbing material and then wrapped with a nano-aerogel insulating tape.

[0025] The material of insulation layer 8 typically possesses excellent insulation and heat resistance properties, preventing current leakage and electric shock accidents. Additionally, insulation layer 8 is wrapped with a layer of nano-aerogel insulating tape, which has extremely low thermal conductivity, effectively insulating against heat and preventing cable damage due to overheating during operation.

[0026] The surface of the nano-aerogel insulation tape has a corrugated, uneven structure. This design increases the surface area of ​​the insulation tape, further improving its heat insulation effect. In addition, the outer side of the insulation layer 8 is coated with a pyrolysis heat-absorbing material. This material can absorb heat and release gas at high temperatures, thus playing a cooling role and further enhancing the heat resistance of the cable.

[0027] Triangular blocks 9 are elastic and are distributed along the length of the cable body 1.

[0028] A sheath layer 12 is extruded on the outside of the metal shielding layer 11. An intumescent flame retardant 13 is added inside the sheath layer 12, which forms a dense carbonized layer at high temperature. The intumescent flame retardant 13 is a ternary system of ammonium polyphosphate-pentaerythritol-melamine. The main function of the sheath layer 12 is to protect the cable from external mechanical damage, chemical corrosion and environmental influences. The intumescent flame retardant 13 can form a dense carbonized layer at high temperature, which plays a role in heat insulation and flame retardancy.

[0029] A fixing component 2 is fitted on the outer side of the cable body 1; The fixing component 2 includes a ring 3, and a plurality of fixing rods 5 are fixed on the outside of the ring 3. The fixing rods 5 are hollow and have an opening 6 at their ends. When the cable body 1 is buried underground, multiple fixing rods 5 can be inserted into the soil to ensure that the cable body 1 will not move or rotate due to external forces during operation, thereby improving the stability of the cable body 1.

[0030] Multiple fixing components 2 are provided, and the multiple fixing components 2 are distributed at equal distances along the length of the cable body 1. The distribution method can ensure that the cable can be uniformly supported and fixed throughout its entire length, avoiding problems such as bending, twisting or displacement of the cable during operation due to insufficient local fixation.

[0031] A fixing screw 4 is provided on the outside of the ring sleeve 3. One end of the fixing screw 4 is pressed against the outside of the ring sleeve 3. The end of the fixing rod 5 away from the cable body 1 is set as a cone, and the tip of the cone is set towards the end away from the cable body 1. The cone design makes it easier for the fixing rod 5 to penetrate the soil when it is inserted into the soil, reducing the resistance during the insertion process.

Claims

1. A low-voltage cable with a flame-retardant structure, comprising a cable body (1), characterized in that: The cable body (1) is fitted with a fixing component (2) on its outer side; The fixing component (2) includes a ring (3), and a plurality of fixing rods (5) are fixed on the outside of the ring (3). The fixing rods (5) are hollow and have an opening (6) at the end. The cable body (1) includes: Triangular block (9), the three sides of the triangular block (9) are concave inward, and each of the three concave parts is provided with a battery cell (7), and the battery cell (7) is wrapped with an insulating layer (8). A flame-retardant layer (10) is wrapped around the outside of the triangular block (9) and the insulating layer (8); A metal shielding layer (11) is disposed on the outside of the flame retardant layer (10).

2. A low-voltage cable with a flame-retardant structure according to claim 1, characterized in that: The triangular block (9) is elastic and is distributed along the length of the cable body (1).

3. A low-voltage cable with a flame-retardant structure according to claim 1, characterized in that: A fixing screw (4) is provided on the outside of the ring (3), and one end of the fixing screw (4) is pressed against the outside of the ring (3).

4. A low-voltage cable with a flame-retardant structure according to claim 1, characterized in that: The fixed plug (5) is tapered at the end away from the cable body (1), and the tip of the tapered plug is set towards the end away from the cable body (1); The fixing components (2) are provided in multiple ways, and the multiple fixing components (2) are distributed at equal distances along the length direction of the cable body (1).

5. A low-voltage cable with a flame-retardant structure according to claim 1, characterized in that: The outer side of the insulating layer (8) is wrapped with a nano-aerogel insulating layer.

Images