A compression resistant, age resistant cable

Abstract

A pressure-resistant and anti-aging cable is provided to address the technical problem mentioned in the background art: existing cables lack a pressure-resistant structure, making them susceptible to compression and bending during construction or use, leading to insulation cracking or even conductor breakage, causing short circuits or leakage faults. The cable core includes an insulation layer covering its outer wall, a first protective layer covering the outer wall of the insulation layer, a second protective layer on the outer wall of the first protective layer, and several ring-shaped, equidistantly distributed air pockets for buffering between the first and second protective layers. A pressure-resistant inner tube is located on the outer wall of the second protective layer, and a pressure-resistant outer tube is located on the outer wall of the pressure-resistant inner tube. Several ring-shaped, equidistantly distributed support rods are fixed between the pressure-resistant inner tube and the pressure-resistant outer tube, and a pressure-resistant component is provided between adjacent support rods to improve the pressure resistance of the pressure-resistant outer tube.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a pressure-resistant and anti-aging cable. Background Technology

[0002] A cable is a material used for power, electrical, and related transmission applications. It is made by twisting multiple conductors together, which are insulated from each other and from the outside. Cables can be classified into many types, including but not limited to power cables, control cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, and aluminum alloy cables. Their common characteristics are internal conductivity and external insulation, and they can be designed into different shapes and sizes to suit specific applications.

[0003] A prior art cable, such as the utility model patent document with authorization announcement number "CN218159727U" and patent name "An Anti-aging Wire and Cable", discloses a cable including a cable core, a base layer fixedly connected to the outer surface of the cable core, an insulating shielding layer fixedly connected to the outer surface of the base layer, a flame-retardant layer fixedly connected to the outer surface of the insulating shielding layer, an anti-aging layer fixedly connected to the outer surface of the flame-retardant layer, the flame-retardant layer including a first fireproof layer, and a second fireproof layer fixedly connected to the outer surface of the first fireproof layer.

[0004] The cables described in the aforementioned patent documents are not designed with a pressure-resistant structure. During construction or use, the cables are easily squeezed and bent, which can lead to cracking of the insulation layer or even breakage of the conductor, causing short circuits or leakage faults. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by proposing a pressure-resistant and anti-aging cable. This addresses the technical problem mentioned in the background art: the existing cables are not designed with a pressure-resistant structure, and the cables are easily squeezed and bent during construction or use, leading to insulation layer cracking or even conductor breakage, causing short circuits or leakage faults.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A pressure-resistant and anti-aging cable includes a cable core, the outer wall of which is covered with an insulation layer, the outer wall of which is covered with a first protective layer, the outer wall of which is provided with a second protective layer, and a plurality of ring-shaped, equidistantly distributed air bladders for buffering are provided between the first and second protective layers, the outer wall of which is provided with a pressure-resistant inner tube, the outer wall of which is provided with a pressure-resistant outer tube, and a plurality of ring-shaped, equidistantly distributed support rods are fixed between the pressure-resistant inner tube and the pressure-resistant outer tube, and a pressure-resistant component for improving the pressure resistance of the pressure-resistant outer tube is provided between two adjacent support rods.

[0008] Working principle:

[0009] When the cable is subjected to external pressure, the pressure-resistant outer tube transmits the pressure to the pressure-resistant component. The pressure-resistant component can distribute the pressure to the support rod, reducing the impact of external pressure on the inside of the cable. The elastic deformation of the air bladder can absorb some of the impact energy, further reducing the impact of external pressure on the cable core inside the cable.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] First, it is equipped with a pressure-resistant component, which can withstand a portion of the external pressure and distribute the external pressure to the support rod, thereby improving the pressure resistance of the outer tube.

[0012] Secondly, it is equipped with an air bladder, which can absorb a certain amount of impact energy through elastic deformation. Combined with the pressure-resistant components, it can reduce the external pressure transmitted to the cable core inside the cable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the compression-resistant component.

[0015] Explanation of reference numerals in the attached drawings: 1. Cable core; 2. Insulation layer; 3. First protective layer; 4. Second protective layer; 5. Airbag; 6. Pressure-resistant inner tube; 7. Pressure-resistant outer tube; 8. Support rod; 9. Support block; 10. Pressure-resistant rope; 11. Arc groove; 12. Diagonal brace block; 13. Buffer hole; 14. Fixing block; 15. Connecting block; 16. Anti-torsion strip; 17. Anti-torsion groove. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0017] Example:

[0018] like Figure 1 As shown, a pressure-resistant and anti-aging cable includes a cable core 1, which uses tin-plated copper conductors to ensure conductivity while improving oxidation resistance. The outer wall of the cable core 1 is covered with an insulation layer 2, which is made of cross-linked polyethylene (XLPE) and has both high insulation and anti-aging properties.

[0019] like Figure 1 As shown, the outer wall of the insulation layer 2 is covered with a first protective layer 3, and the outer wall of the first protective layer 3 is provided with a second protective layer 4, which is made of polyvinyl chloride (PVC) co-extruded and has ultraviolet absorbers and flame retardants added to its surface to form a double-layer anti-corrosion barrier.

[0020] like Figure 1As shown, a number of airbags 5 arranged in a ring and equidistantly between the first protective layer 3 and the second protective layer 4 are provided for buffering. They are made of butyl rubber and filled with inert gas (such as nitrogen). When compressed, they absorb impact energy through elastic deformation.

[0021] like Figure 1 and Figure 2 As shown, the outer wall of the second protective layer 4 is provided with a pressure-resistant inner tube 6, which is made of nylon-reinforced composite material. The outer wall of the pressure-resistant inner tube 6 is provided with a pressure-resistant outer tube 7, which is made of polycarbonate and glass fiber composite injection molding. The pressure-resistant inner tube 6 and the pressure-resistant outer tube 7 cooperate to form a rigid pressure-resistant shell. Several support rods 8 are fixed between the pressure-resistant inner tube 6 and the pressure-resistant outer tube 7 in a ring shape and evenly distributed. Between two adjacent support rods 8, there is a pressure-resistant component for improving the pressure resistance of the pressure-resistant outer tube 7. The pressure-resistant component includes an M-shaped support block 9 and a pressure-resistant rope 10. The support block 9 is fixed on the inner wall of the pressure-resistant outer tube 7, and an arc-shaped groove 11 is opened at the end of the support block 9 away from the pressure-resistant outer tube 7. The two ends of the pressure-resistant rope 10 are fixed to the two support rods 8 respectively, and the pressure-resistant rope 10 abuts against the inner wall of the arc groove 11. When the pressure-resistant outer tube 7 is compressed, it undergoes a slight elastic deformation, converting the vertical pressure into annular tangential stress. The external pressure is transmitted to the M-shaped support block 9 through the pressure-resistant outer tube 7. The support block 9 undergoes elastic compression, further dissipating energy. The support block 9 is made of TPEE material, and its arc groove 11 guides the pressure-resistant rope 10 to generate pre-tightening force. The pressure-resistant rope 10 made of aramid fiber resists deformation through stretching. The support rods 8 made of nylon (PA66) are distributed in annular equidistant pattern. When compressed, they form a triangular stable structure, transmitting the external force to the connection interface between the pressure-resistant inner tube 6 and the outer tube.

[0022] like Figure 1 As shown, each support rod 8 has a diagonal brace 12 fixed at both ends of its bottom, and the diagonal brace 12 is fixed to the outer wall of the pressure-resistant inner tube 6. The diagonal brace 12 is made of nylon (PA66) and has carbon fiber reinforcing ribs embedded inside to improve the axial compressive strength of the support rod 8.

[0023] like Figure 1 As shown, the inner tube 6 is provided with several buffer holes 13 arranged in a ring at equal intervals to provide deformation space. The buffer holes 13 are arranged in a spiral on the inner tube 6 and can deform when the inner tube 6 is under pressure.

[0024] like Figure 1 As shown, a number of fixed blocks 14 are fixedly arranged in a ring shape and equidistantly between the first protective layer 3 and the second protective layer 4. An arc-shaped connecting block 15 is fixedly arranged between two adjacent fixed blocks 14. The airbag 5 is located between two fixed blocks 14. The fixed blocks 14 are made of hard rubber, and the connecting blocks 15 are made of thermoplastic vulcanizate (TPV). They are bonded to the first protective layer 3 and the second protective layer 4 through a vulcanization process to restrict the displacement of the airbag 5.

[0025] like Figure 1 As shown, the outer wall of the second protective layer 4 is fixed with several anti-torsion strips 16 arranged in a ring at equal intervals, and the inner wall of the pressure-resistant inner tube 6 is provided with several anti-torsion grooves 17 for contacting the anti-torsion strips 16. When pressure is accompanied by torsional force, the anti-torsion strips 16 covered with PTFE stainless steel wire slide in the anti-torsion grooves 17 of the pressure-resistant inner tube 6, thereby reducing the transmission of torsional stress to the cable core 1 through the low friction coefficient.

[0026] Working principle:

[0027] External pressure first acts on the outer pressure-resistant tube 7 and causes radial elastic compression. At this time, the outer pressure-resistant tube 7 converts the vertical pressure into annular tangential stress and transmits the pressure to the support rod 8. After being compressed, the support block 9 undergoes elastic deformation, and its arc groove 11 guides the pressure-resistant rope 10 to a pre-stretched state, forcing the pressure-resistant rope 10 to participate in the force. The annular buffer hole 13 inside the inner pressure-resistant tube 6 undergoes directional deformation and contraction under pressure, releasing the internal stress. Afterward, the external pressure continues to be transmitted inward through the inner pressure-resistant tube 6, causing the airbag 5 between the first protective layer 3 and the second protective layer 4 to be compressed. The impact energy is absorbed by the compression work of the gas inside the airbag 5. The first protective layer 3 and the second protective layer 4 form a composite barrier. Combined with the limiting structure of the fixing block 14 and the connecting block 15, the influence of external pressure on the cable core 1 is reduced. The anti-torsion strip 16 and the anti-torsion groove 17 can convert the torsional stress into heat energy and dissipate it when pressure is accompanied by torsional force.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pressure-resistant and anti-aging cable, characterized in that, The cable core (1) is covered with an insulation layer (2) on its outer wall. The insulation layer (2) is covered with a first protective layer (3) on its outer wall. The first protective layer (3) is provided with a second protective layer (4) on its outer wall. A plurality of airbags (5) are provided between the first protective layer (3) and the second protective layer (4) in a ring-shaped and equidistant arrangement for buffering. The second protective layer (4) is provided with a pressure-resistant inner tube (6) on its outer wall. The pressure-resistant inner tube (6) is provided with a pressure-resistant outer tube (7) on its outer wall. A plurality of support rods (8) are fixed between the pressure-resistant inner tube (6) and the pressure-resistant outer tube (7). A pressure-resistant component is provided between two adjacent support rods (8) to improve the pressure resistance of the pressure-resistant outer tube (7).

2. The anti-pressure and anti-aging cable according to claim 1, characterized in that: The pressure-resistant component includes an M-shaped support block (9) and a pressure-resistant rope (10). The support block (9) is fixed on the inner wall of the pressure-resistant outer tube (7). An arc-shaped groove (11) is opened at the end of the support block (9) away from the pressure-resistant outer tube (7). The two ends of the pressure-resistant rope (10) are fixed to two support rods (8) respectively, and the pressure-resistant rope (10) abuts against the inner wall of the arc-shaped groove (11).

3. The anti-pressure and anti-aging cable according to claim 2, characterized in that: Each of the support rods (8) has a diagonal brace (12) fixed at both ends of its bottom, and the diagonal brace (12) is fixed to the outer wall of the pressure-resistant inner tube (6).

4. The anti-pressure and anti-aging cable according to claim 1, characterized in that: The pressure-resistant inner tube (6) has several buffer holes (13) arranged in a ring at equal intervals to provide deformation space.

5. The anti-pressure and anti-aging cable according to claim 1, characterized in that: A plurality of fixed blocks (14) are fixed between the first protective layer (3) and the second protective layer (4) in a ring-shaped equidistant arrangement, and an arc-shaped connecting block (15) is fixed between two adjacent fixed blocks (14). The airbag (5) is located between two fixed blocks (14).

6. The anti-pressure and anti-aging cable according to claim 1, characterized in that: The outer wall of the second protective layer (4) is fixed with a number of anti-torsion strips (16) that are distributed in a ring at equal intervals, and the inner wall of the pressure-resistant inner tube (6) is provided with a number of anti-torsion grooves (17) for abutting against the anti-torsion strips (16).

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