A waterproof rubber-sheathed cable

Abstract

The utility model relates to cable technical field, concretely relates to a waterproof rubber cable, including setting in the cable core and the first waterproof grease, encapsulation layer, inner sheath, armoring layer and outer sheath that cover in the conductor outside in cable center, the cable core is twisted and is made of a plurality of conductors, and the interstice of a plurality of the conductor insides is filled with second waterproof grease, the first waterproof grease coats in the cable core outside, the encapsulation layer adopts the mode of around package or longitudinal package and is wound in the first waterproof grease outside, the inner sheath is extruded and is packed outside the encapsulation layer, the armoring layer adopts the mode of around package or longitudinal package and is wound in the inner sheath outside, the outer sheath is extruded and is packed outside the inner sheath. The waterproof rubber cable through " layering waterproof and structure reinforcement " combination, has realized high waterproof, high mechanical strength, high environmental adaptability comprehensive technical effect, has given consideration to electrical performance stability and use reliability, is suitable for the industry and outdoor scene of strict waterproof, protection requirement.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a waterproof rubber-sheathed cable. Background Technology

[0002] A cable is a combination of conductors used to transmit electrical energy, signals, or data. It typically consists of one or more conductors, shielding insulation layers, stranded layers, and sheathing layers to protect the conductors and provide necessary electrical and mechanical properties. Cables are widely used in power systems, communication networks, data transmission, electronic equipment, and industrial and construction sectors.

[0003] Traditional cables typically use a single sheath for protection. This design is relatively simple and suitable for general applications, but it can have limitations and drawbacks when facing special environments and conditions. In underwater environments, cables face extremely complex challenges. Fluctuations in sea level and rapid changes in currents cause rapid and significant changes in water pressure. Taking submarine cables as an example, according to Chinese patent CN202322552759, a waterproof rubber-sheathed cable experiences an increase in water pressure of approximately one atmosphere for every 10 meters of depth. Under such frequent pressure fluctuations, the limited space between the outer and inner sheaths of traditional cables is easily compressed instantaneously. This compression can cause internal structural deformation, conductor displacement, and even insulation rupture, ultimately leading to cable damage, power transmission interruption, or signal distortion. Furthermore, prolonged immersion in water exposes the airtightness issues of ordinary cables, allowing moisture to slowly seep into the cable, corroding the conductors, reducing insulation performance, and significantly shortening the cable's lifespan. Therefore, there is an urgent need for a waterproof rubber-sheathed cable. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a waterproof rubber-sheathed cable. Through the combination of "layered waterproofing and structural reinforcement", it achieves a comprehensive technical effect of high waterproofing, high mechanical strength and high environmental adaptability, while taking into account the stability of electrical performance and reliability of use. It is suitable for industrial and outdoor scenarios with strict requirements for waterproofing and protection.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A waterproof rubber-sheathed cable includes a cable core disposed at the center of the cable and a first waterproof grease, an encapsulation layer, an inner sheath, an armor layer, and an outer sheath sequentially wrapped around the conductor. The cable core is composed of multiple conductors twisted together, and the gaps inside the multiple conductors are filled with a second waterproof grease. The first waterproof grease is coated on the outside of the cable core. The encapsulation layer is wrapped around the first waterproof grease by wrapping or longitudinal wrapping. The inner sheath is extruded outside the encapsulation layer. The armor layer is wrapped around the inner sheath by wrapping or longitudinal wrapping. The outer sheath is extruded outside the armor layer.

[0007] Furthermore, the penetration of the first waterproof sealant is 300-350 (0.1 mm).

[0008] Furthermore, the penetration of the second waterproofing grease is 260-300 (0.1 mm).

[0009] Furthermore, the encapsulation layer is a double-layer water-blocking tape or a metal foil.

[0010] Furthermore, both the inner and outer sheaths are made of irradiated cross-linked chloroprene rubber.

[0011] Furthermore, the armor layer is a steel strip.

[0012] Furthermore, the conductor comprises multiple strands and an insulating layer extruded over the multiple strands, wherein the strands are at least one of finely stranded bare copper wire or plated copper wire.

[0013] Furthermore, the coated copper wire is a nickel-plated copper wire or a gold-plated copper wire.

[0014] Furthermore, the insulating layer is an EPDM rubber insulating layer.

[0015] The beneficial effects of this utility model are as follows: The waterproof rubber-sheathed cable of this utility model achieves a comprehensive technical effect of high waterproof performance, high mechanical strength, and high environmental adaptability through the combination of "layered waterproofing and structural reinforcement". The second waterproof grease can block moisture from seeping into the cable interior through the conductor gaps, preventing the conductor from oxidizing or short-circuiting due to moisture, thus achieving waterproofing of the internal gaps; the first waterproof grease forms a continuous sealing layer, further blocking moisture intrusion, and at the same time, it works with the internal grease to form a "filling inside and sealing outside" double waterproof structure. The encapsulation layer tightly wraps the first waterproof grease, which not only fixes the grease to prevent loss, but also strengthens the waterproof barrier through physical barriers, making it particularly suitable for harsh environments such as dampness and immersion, enhancing sealing performance. The inner sheath can fix the internal structure, preventing the cable core from shifting due to bending and stretching, while also buffering external mechanical stress. The armor layer can significantly improve the cable's impact resistance, crush resistance, and tear resistance, protecting the internal structure from external force damage such as construction collisions and heavy object compression, extending its service life. As the outermost protective sleeve, it not only has excellent wear resistance, aging resistance, and chemical corrosion resistance, but also directly resists external moisture, dust, ultraviolet rays, and other erosion. At the same time, it works with the armor layer to form a composite protection system of "hard protection and soft sealing". Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a waterproof rubber-sheathed cable.

[0017] The reference numerals in the figures include:

[0018] 1. Conductor; 11. Stranded wire; 12. Insulation layer; 2. Second waterproof sealant; 3. First waterproof sealant; 4. Encapsulation layer; 5. Inner sheath; 6. Armor layer; 7. Outer sheath. Detailed Implementation

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0020] like Figure 1 As shown, a waterproof rubber-sheathed cable includes a cable core disposed at the center of the cable and a first waterproof grease 3, an encapsulation layer 4, an inner sheath 5, an armor layer 6, and an outer sheath 7 sequentially wrapped around the conductor 1. The cable core is formed by twisting multiple conductors 1 together. The gaps inside the multiple conductors 1 are filled with a second waterproof grease 2. The first waterproof grease 3 is coated on the outside of the cable core. The encapsulation layer 4 is wrapped around the first waterproof grease 3 by wrapping or longitudinal wrapping. The inner sheath 5 is formed by extruding the first waterproof grease 3 around the encapsulation layer 4. The armor layer 6 is wrapped around the inner sheath 5 by wrapping or longitudinal wrapping. The outer sheath 7 is formed by extruding the armor layer 6 around the inner sheath 5.

[0021] This utility model of a waterproof rubber-sheathed cable achieves a comprehensive technical effect of high waterproofness, high mechanical strength, and high environmental adaptability through a combination of "layered waterproofing and structural reinforcement," while also considering electrical performance stability and reliability. It is suitable for industrial and outdoor scenarios with stringent waterproofing and protection requirements. Specifically, the gaps formed by the twisting of multiple conductors 1 in the cable core are filled with a second waterproof grease 2, which prevents moisture from seeping into the cable interior through the gaps in the conductors 1, avoiding oxidation or short circuits due to moisture, thus achieving internal gap waterproofing. Furthermore, the first waterproof grease 3 coated on the outside of the cable core forms a continuous sealing layer, further blocking moisture intrusion. This, combined with the internal grease, forms a double waterproof structure of "internal filling and external sealing." Simultaneously, the encapsulation layer 4, using a wrapping or longitudinal wrapping method, tightly wraps the first waterproof grease 3, both fixing the grease to prevent loss and strengthening the waterproof barrier through physical barriers, making it particularly suitable for harsh environments such as humid and immersion environments, enhancing sealing performance. The inner sheath 5, extruded outside the encapsulation layer 4, has a certain elasticity and strength, fixing the internal structure and preventing displacement of the cable core due to bending and stretching, while also buffering external mechanical stress. The wrapping or longitudinally wrapped armor layer 6 significantly improves the cable's impact resistance, crush resistance, and tear resistance, protecting the internal structure from damage caused by construction collisions, heavy object compression, and other external forces, thus extending its service life. The outermost sheath 7 not only possesses excellent wear resistance, aging resistance, and chemical corrosion resistance, but also directly resists external moisture, dust, and ultraviolet radiation. Furthermore, it works in conjunction with the armor layer 6 to form a composite protection system of "hard protection and soft sealing."

[0022] Furthermore, the penetration of the first waterproof sealant 3 at 25°C is 300-350 (0.1 mm), and the penetration of the second waterproof sealant 2 at 25°C is 260-300 (0.1 mm). Compared to the first waterproof sealant 3, the second waterproof sealant 2 has a lower penetration and higher hardness, meaning it is thicker and more resistant to flow. It is used to fill the gaps formed by the stranding of the conductors 1 within the cable core, tightly filling the irregular gaps between the conductors 1 to form a stable "solid seal." This prevents the sealant from leaking out of the gaps when the cable bends or vibrates, ensuring long-term sealing of the moisture intrusion path. Simultaneously, its higher hardness reduces friction at the stranding points of the conductors 1 and provides some support when the cable core is under stress, preventing the internal structure from becoming loose. The first waterproof grease 3 has a higher penetration and is more flexible, while the second waterproof grease 2 has better flexibility. When applied to the outside of the cable core, it can closely fit the irregular contours of the outer surface of the cable core formed by the twisting of conductor 1, forming a continuous and gapless sealing layer. This fills the microscopic gaps in the outer layer of the cable core. When the cable is bent or stretched, the soft grease can stretch with the deformation of the cable core, avoiding cracking of the sealing layer due to excessive rigidity and maintaining long-term waterproof integrity.

[0023] Furthermore, both the first waterproof grease 3 and the second waterproof grease 2 are nano waterproof greases, using existing nano waterproof greases. Preferably, the first waterproof grease 3 and the second waterproof grease 2 are Ecco Grease GR300.

[0024] Furthermore, the second waterproof sealant 2 is injected into the gaps inside multiple conductors 1 using a high-pressure sealant filling machine. The pressure forces the sealant to fully penetrate into the tiny gaps between the conductors 1, achieving a seamless filling.

[0025] Furthermore, the encapsulation layer 4, with its double-layer water-blocking tape or metal foil, can both fix the grease to prevent leakage and strengthen the waterproof barrier through physical isolation, making it particularly suitable for harsh environments such as dampness and immersion, thus enhancing sealing performance.

[0026] Furthermore, both the inner sheath 5 and the outer sheath 7 are made of radiation-crosslinked chloroprene rubber with an irradiation dose of 8-20 MRad. Chloroprene rubber itself has good water resistance and impermeability, while the radiation crosslinking process uses high-energy rays to form a three-dimensional network structure of rubber molecules, further reducing the gaps between molecules and the possibility of water penetration, while also providing high strength and tear resistance. The inner sheath 5 is located on the outside of the encapsulation layer 4, which can prevent water from penetrating into the inner layer after breaking through the encapsulation layer 4; the outer sheath 7 is in direct contact with the external environment (such as soil, water, humid air, etc.), and its high-density crosslinked structure can resist the erosion of moisture and humidity for a long time, while also being resistant to corrosive media such as acids, alkalis, and salt spray, making it suitable for outdoor, underground, humid, or chemically polluted environments, thus improving the mechanical strength and weather resistance of the cable.

[0027] Furthermore, the armor layer 6 is a steel strip, which is used to enhance the cable's resistance to pressure and impact, protect the internal structure from external damage such as construction collisions and heavy object compression, and extend its service life.

[0028] Furthermore, the conductor 1 includes multiple strands 11 and an insulating layer 12 extruded over the multiple strands 11. The strands 11 are at least one of finely stranded bare copper wire or copper wire with a plating layer, which improves conductivity and transmission efficiency.

[0029] Furthermore, the coated copper wire is either nickel-plated copper wire or gold-plated copper wire. Nickel-plated copper wire can improve the cable's temperature resistance, general corrosion resistance, and mechanical strength, while gold-plated copper wire can improve the cable's resistance to corrosion in extreme environments, signal transmission accuracy, and lifespan.

[0030] Furthermore, the insulating layer 12 is an EPDM rubber insulating layer 12, which can improve the insulation performance of the conductor 1.

[0031] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A waterproof rubber-sheathed cable, characterized in that: The cable includes a cable core located at the center of the cable and a first waterproof grease (3), an encapsulation layer (4), an inner sheath (5), an armor layer (6), and an outer sheath (7) sequentially covering the cable core. The cable core is made of multiple conductors (1) twisted together. The gaps inside the multiple conductors (1) are filled with a second waterproof grease (2). The first waterproof grease (3) is coated on the outside of the cable core. The encapsulation layer (4) is wrapped around the first waterproof grease (3) by wrapping or longitudinal wrapping. The inner sheath (5) is extruded outside the encapsulation layer (4). The armor layer (6) is wrapped around the inner sheath (5) by wrapping or longitudinal wrapping. The outer sheath (7) is extruded outside the armor layer (6).

2. The waterproof rubber-sheathed cable according to claim 1, characterized in that: The penetration of the first waterproof sealant (3) is 300-350 (0.1 mm).

3. The waterproof rubber-sheathed cable according to claim 1, characterized in that: The penetration of the second waterproof sealant (2) is 260-300 (0.1 mm).

4. The waterproof rubber-sheathed cable according to claim 1, characterized in that: The encapsulation layer (4) is a double-layer water-blocking tape or metal foil.

5. The waterproof rubber-sheathed cable according to claim 1, characterized in that: Both the inner sheath (5) and the outer sheath (7) are irradiated cross-linked chloroprene rubber.

6. The waterproof rubber-sheathed cable according to claim 1, characterized in that: The armor layer (6) is a steel strip.

7. The waterproof rubber-sheathed cable according to claim 1, characterized in that: The conductor (1) includes multiple strands (11) and an insulating layer (12) extruded over the multiple strands (11), wherein the strands (11) are at least one of finely stranded bare copper wire or plated copper wire.

8. The waterproof rubber-sheathed cable according to claim 7, characterized in that: The copper wire with the coating is either nickel-plated copper wire or gold-plated copper wire.

9. The waterproof rubber-sheathed cable according to claim 7, characterized in that: The insulating layer (12) is an EPDM rubber insulating layer (12).

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