A corrosion-resistant and oil-resistant cable

Abstract

The present invention discloses a corrosion-resistant and oil-resistant cable, which specifically relates to the field of cable technology, and comprises a cable body, wherein the cable body comprises a core conductor, an insulating layer is wrapped around the core conductor, a filling layer is wrapped around the insulating layer, a protective layer is wrapped around the filling layer, an armor layer is provided on the outer side of the protective layer, an outer sheath is wrapped around the armor layer, and a plurality of isolation layers and buffer layers are provided between the armor layer and the protective layer, which are equidistantly distributed along the length direction of the cable. The present invention provides an isolation layer, and when cracks appear in the outer sheath of the cable due to corrosion of oil, the oil will be absorbed by the oil-absorbing cotton in the receiving cavity. However, the cable generates heat, which causes the inert gas in the airbag to expand when heated, and squeezes the oil-absorbing cotton, so that the oil in the oil-absorbing cotton is discharged along the gap, and the gap is blocked to prevent the oil from re-entering the receiving cavity, thereby isolating the oil from corroding the insulating layer and preventing the risk of leakage or short circuit, thereby improving the service life of the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a corrosion-resistant and oil-resistant cable. Background Art

[0002] With the rapid development of industrial technology, cables, as key carriers of power transmission and signal control, are experiencing increasingly complex applications. In fields such as petrochemicals, marine engineering, automotive manufacturing, mining machinery, and specialized equipment, cables are exposed to harsh environments such as corrosive media, oil, organic solvents, and high humidity for extended periods of time. Traditional cable sheathing materials lack corrosion resistance, oil resistance, and mechanical strength, making them susceptible to aging, swelling, cracking, and even insulation failure, leading to equipment failure and potential safety hazards.

[0003] A Chinese patent application numbered CN202011302587.3 discloses an oil-resistant and corrosion-resistant optical cable for a 5G substation, comprising a conductor and an insulating layer, wherein the outer side of the conductor is fixedly connected to a reinforcing rib having one end fixedly connected to the insulating layer, a space filler is filled between the conductor and the insulating layer, an anti-seismic protection belt is fixedly connected to the outer side of the insulating layer, an oil-resistant layer is fixedly connected to the outer side of the anti-seismic protection belt, an anti-seismic filler is filled between the oil-resistant layer and the insulating layer and located on the outer side of the anti-seismic protection belt, and a plurality of oil-resistant plasticizers are fixedly connected to the outer peripheral wall of the oil-resistant layer. The oil-resistant and corrosion-resistant optical cable for a 5G substation improves the oil resistance and abrasion resistance of the optical cable by the coordinated use of the oil-resistant layer and the oil-resistant plasticizer. The overall coordinated use improves the corrosion resistance and fire resistance of the optical cable, further increases the service life of the optical cable, improves the safety of the 5G substation, and facilitates use.

[0004] Although the above invention can improve the oil resistance of the cable through the oil-resistant plasticizer, the existing oil-resistant and corrosion-resistant cables are often used in highly polluted places. Due to long-term immersion in oil, cracks will appear on the outer layer of the cable due to long-term corrosion by the oil. If the oil enters the interior of the cable through the gap and contacts the insulation layer, it will corrode and age the insulation material of the cable over a long period of time, resulting in a decrease in insulation performance, and may cause the risk of leakage or short circuit. If the oil enters the interior of the cable and contacts the conductor, it will cause oxidation or corrosion on the surface of the conductor, which will increase the resistance of the conductor, causing the risk of local overheating or even fire, which will affect the service life of the cable. Summary of the Invention

[0005] The purpose of the present invention is to provide a corrosion-resistant and oil-resistant cable, which aims to solve the problem that the existing oil-resistant and corrosion-resistant cables are often used in highly polluted places. Due to long-term immersion in oil, cracks will appear on the outer layer of the cable due to long-term corrosion of the oil. If the oil enters the interior of the cable through the gap and contacts the insulation layer, it will corrode and age the insulation material of the cable for a long time, resulting in a decrease in insulation performance, and may cause the risk of leakage or short circuit. If the oil enters the interior of the cable and contacts the conductor, it will cause oxidation or corrosion on the surface of the conductor, which will increase the resistance of the conductor, causing local overheating and even the risk of fire. In summary, the oil entering the interior of the cable will affect the service life of the cable.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a corrosion-resistant and oil-resistant cable, comprising a cable body, the cable body comprising a core conductor, the core conductors being provided with a plurality of core conductors, the plurality of core conductors being wrapped with an insulating layer, the plurality of insulating layers being wrapped with a filling layer, the filling layer being wrapped with a protective layer, the protective layer being sheathed with an armor layer, the armor layer being sheathed with an outer sheath, and a plurality of isolation layers and buffer layers being sheathed between the armor layer and the protective layer and being equidistantly distributed along the length of the cable;

[0007] The isolation layer includes a plurality of isolation blocks, which are equidistantly distributed around the circumference. A accommodating cavity is provided in each isolation block, an airbag is fixedly connected to each accommodating cavity, and oil-absorbing cotton is provided above each airbag, and each oil-absorbing cotton is slidably connected to the accommodating cavity.

[0008] Preferably, each of the accommodating cavities and the airbag is filled with an inert gas, and the inert gas in the accommodating cavity and the inert gas in the airbag are in a pressure equilibrium state.

[0009] Preferably, the buffer layer includes a plurality of intermittently arranged protrusions and depressions.

[0010] Preferably, the buffer layer is made of elastic material, and when the buffer layer is squeezed, both ends of the buffer layer will extend along the length direction of the cable.

[0011] Preferably, when the oil on the outside of the cable body enters the accommodating cavity, it will be absorbed by the oil-absorbing cotton in the accommodating cavity.

[0012] Preferably, when the accommodating cavity is communicated with the outside, the inert gas in the accommodating cavity will be discharged, and the pressure balance between the inert gas in the accommodating cavity and the airbag will be broken.

[0013] Preferably, the inert gas in the airbag will expand due to the continuous heat generated by the operation of the core conductor. When the airbag expands, it will push the oil-absorbing cotton to move away from the buffer layer, so that the top of the oil-absorbing cotton is attached to the inner wall of the accommodating cavity and squeezes the oil-absorbing cotton to discharge the oil inside the oil-absorbing cotton and block the gap to prevent the oil from entering the accommodating cavity again.

[0014] Preferably, when the core conductor continues to generate heat during operation, the inert gas in the airbag will continue to expand due to the temperature of the core conductor.

[0015] Preferably, the expansion of the inert gas in the airbag is constrained by the armor layer and squeezes the buffer layer inward, and the buffer layer is squeezed by the airbag, and both ends of the buffer layer extend along the length of the cable, thereby forming a new layer of protection for the cable.

[0016] Preferably, the materials used for the insulating layer, the protective layer and the outer sheath are all environmentally friendly, oleophobic and wear-resistant materials.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention provides an isolation layer. When cracks appear in the outer sheath of the cable due to corrosion of oil, the oil will enter the accommodating cavity through the gaps and be absorbed by the oil-absorbing cotton in the accommodating cavity. The inert gas in the accommodating cavity will be discharged outward through the gaps. However, the core conductor of the cable will generate heat when it continues to work, causing the inert gas in the airbag to expand when heated and squeeze the oil-absorbing cotton. The oil in the oil-absorbing cotton will be discharged through the gaps, and the gaps will be blocked to prevent the oil from entering the accommodating cavity again. This isolates the insulation layer from corrosion by the oil, prevents the risk of leakage or short circuit, and thus increases the service life of the cable.

[0019] 2. The present invention provides a buffer layer. When the core conductor continues to work, it generates heat, causing the inert gas in the airbag to absorb the heat and continue to expand. Because the armor layer is bound outside the isolation layer, the airbag expands toward the buffer layer and squeezes the buffer layer. The buffer layer is squeezed by the airbag, and both ends of the buffer layer extend along the length of the cable, thereby forming a new layer of protection for the cable, preventing the expansion of the gap due to the expansion of the airbag, isolating oil and dirt from entering through the gap again, corroding the insulation layer, and reducing the risk of insulation performance degradation. It also prevents the risk of leakage or short circuit, thereby improving the performance and service life of the cable.

[0020] 3. The present invention provides a buffer layer. When the outer sheath of the cable is not broken, the core conductor will expand due to heat when it runs for a long time, thereby expanding the protective layer and squeezing the buffer layer. When the buffer layer is squeezed, both ends of the buffer layer will extend along the length of the cable to form a new layer of protection, preventing the cable core from thermally expanding due to heat, which will excessively squeeze the outer sheath and cause the risk of the outer sheath breaking, thereby improving the safety and life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 Schematic diagram of the distribution of the protective layer and outer protective layer structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the isolation layer structure distribution of the present invention;

[0024] Figure 4 Schematic diagram of the overall structure of the isolation layer of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the isolation block of the present invention;

[0026] Figure 6 This is a schematic diagram of the structural distribution of the isolation blocks of the present invention;

[0027] Figure 7 Schematic diagram of the airbag structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the airbag expansion structure of the present invention;

[0029] Figure 9 This is a cross-sectional view of the cable body structure of the present invention;

[0030] Figure 10 Schematic diagram of the overall structure of the buffer layer of the present invention;

[0031] Figure 11 This is a cross-sectional view of the buffer layer structure of the present invention.

[0032] The figures are marked as follows: 1. Cable body; 11. Core conductor; 12. Insulation layer; 13. Filling layer; 14. Protective layer; 15. Armor layer; 16. Outer sheath; 2. Isolation layer; 21. Isolation block; 22. Accommodation cavity; 23. Air bag; 24. Oil-absorbing cotton; 3. Buffer layer; 31. Protrusion; 32. Recessed portion. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] Existing oil-resistant and corrosion-resistant cables are often used in highly polluted places. Due to long-term immersion in oil, cracks will appear on the outer layer of the cable due to long-term corrosion by the oil. If the oil enters the interior of the cable through the gap and contacts the insulation layer, it will corrode and age the insulation material of the cable over a long period of time, resulting in a decrease in insulation performance, which may cause the risk of leakage or short circuit. If the oil enters the interior of the cable and contacts the conductor, it will cause oxidation or corrosion on the surface of the conductor, which will increase the resistance of the conductor, causing local overheating and even the risk of fire. In summary, oil entering the interior of the cable will affect the service life of the cable. This embodiment is specially invented to solve the above problems.

[0036] like Figures 1 to 11 As shown, a corrosion-resistant and oil-resistant cable includes a cable body 1, and the cable body 1 includes a core conductor 11. There are several core conductors 11, and the core conductors 11 are each wrapped with an insulating layer 12. The insulating layers 12 are each wrapped with a filling layer 13. The filling layer 13 is wrapped with a protective layer 14. The protective layer 14 is covered with an armor layer 15. The armor layer 15 is covered with an outer sheath 16. Between the armor layer 15 and the protective layer 14 are multiple groups of isolation layers 2 and buffer layers 3 that are equidistantly distributed along the length of the cable.

[0037] like Figures 1 to 9 As shown, the isolation layer 2 includes a plurality of isolation blocks 21, and the isolation blocks 21 are equidistantly distributed around the circumference. A accommodating cavity 22 is provided in each isolation block 21, and an airbag 23 is fixedly connected to each accommodating cavity 22. Oil-absorbing cotton 24 is provided above each airbag 23, and each oil-absorbing cotton 24 is slidably connected to the accommodating cavity 22. Each accommodating cavity 22 and the airbag 23 are filled with inert gas, and the inert gas in the accommodating cavity 22 and the inert gas in the airbag 23 are in a pressure balance state.

[0038] like Figures 1 to 9As shown, when the outer sheath 16 and the armor layer 15 are corroded by oil and gaps appear, the oil on the outside of the cable body 1 will enter the accommodating cavity 22 through the gap, and will be absorbed by the oil-absorbing cotton 24 in the accommodating cavity 22. The inert gas in the accommodating cavity 22 will be discharged through the gap, and will break the pressure balance of the inert gas in the accommodating cavity 22 and the airbag 23. The inert gas in the airbag 23 will expand due to the continuous heat generated by the operation of the core conductor 11. When the airbag 23 expands, it will push the oil-absorbing cotton 24 away from the buffer layer 3, so that the top of the oil-absorbing cotton 24 is attached to the inner wall of the accommodating cavity 22 and squeezes the oil-absorbing cotton 24, so that the oil in the oil-absorbing cotton 24 is discharged through the gap, and the gap is blocked to prevent the oil from entering the accommodating cavity 22 again. The materials used for the insulating layer 12, the protective layer 14 and the outer sheath 16 are all environmentally friendly, oil-repellent and wear-resistant materials.

[0039] During specific use, when the outer sheath 16 of the cable is corroded and cracks appear on the surface due to long-term contact with oil, when the oil enters the accommodating cavity 22 through the gap, the oil will be absorbed by the oil-absorbing cotton 24 in the accommodating cavity 22, and the inert gas in the accommodating cavity 22 will be discharged outward along the gap, which will break the gas pressure balance between the airbag 23 and the accommodating cavity 22. However, the core conductor 11 of the cable will generate heat when it continues to work, and the heat will be transferred to the inert gas, causing the inert gas in the airbag 23 to expand when it encounters heat. When the airbag 23 expands, it will move against the oil-absorbing cotton 24 and squeeze the oil-absorbing cotton 24, so that the oil in the oil-absorbing cotton 24 is discharged along the gap, and the gap is blocked to prevent the oil from entering the accommodating cavity 22 again.

[0040] To sum up, through the setting of the isolation layer 2, when the outer sheath 16 of the cable is corroded by oil and cracks appear, the oil will enter the accommodating cavity 22 through the gap, and the oil will be absorbed by the oil-absorbing cotton 24 in the accommodating cavity 22, and the inert gas in the accommodating cavity 22 will be discharged outward along the gap. However, the core conductor 11 of the cable will generate heat when it continues to work, causing the inert gas in the airbag 23 to expand when heated, and squeeze the oil-absorbing cotton 24, so that the oil in the oil-absorbing cotton 24 is discharged along the gap, and the gap is blocked to prevent the oil from entering the accommodating cavity 22 again, isolating the insulation layer 12 from corrosion by oil, preventing the risk of leakage or short circuit, and thus improving the service life of the cable.

[0041] Example 2

[0042] Based on the above embodiment, it was found that during use, the cable would continue to generate heat, causing the inert gas in the airbag to continue to expand, further widening the gap. This would allow oil to enter the gap again and corrode the insulation layer, resulting in a decrease in insulation performance, which would cause the risk of leakage or short circuit. This embodiment was specially invented to solve the above problem.

[0043] like Figures 9 to 11As shown, the buffer layer 3 includes a plurality of intermittently arranged protrusions 31 and recesses 32. The buffer layer 3 is made of elastic material. When the buffer layer 3 is squeezed, both ends of the buffer layer 3 will extend along the length direction of the cable.

[0044] like Figures 9 to 11 As shown, when the core conductor 11 continues to generate heat during operation, the inert gas in the airbag 23 will continue to expand due to the temperature of the core conductor 11. Since the outer side of the isolation layer 2 is wrapped with the armor layer 15, the expansion of the inert gas in the airbag 23 will be restrained by the armor layer 15 and will squeeze the buffer layer 3 inward. The buffer layer 3 is squeezed by the airbag 23, and both ends of the buffer layer 3 will extend along the length direction of the cable, thereby forming a new layer of protection for the cable.

[0045] During specific use, when the core conductor 11 continues to work, it will generate heat, and the inert gas in the airbag 23 will absorb the heat generated by the core conductor 11 and continue to expand. Because the armor layer 15 is bound outside the isolation layer 2, the airbag 23 will expand toward the buffer layer 3 and squeeze the buffer layer 3. The buffer layer 3 is squeezed by the airbag 23, and the two ends of the buffer layer 3 will extend along the length direction of the cable, thereby forming a new layer of protection for the cable.

[0046] To sum up, through the setting of the buffer layer 3, when the core conductor 11 continues to work, heat will be generated, causing the inert gas in the airbag 23 to absorb heat and continue to expand. Because the armor layer 15 is bound outside the isolation layer 2, the airbag 23 will expand toward the buffer layer 3 and squeeze the buffer layer 3. The buffer layer 3 is squeezed by the airbag 23, and the two ends of the buffer layer 3 will extend along the length direction of the cable, thereby forming a new layer of protection for the cable, preventing the gap from expanding due to the expansion of the airbag, isolating oil and dirt from entering the gap again, corroding the insulating layer 12, and reducing the risk of insulation performance degradation, preventing the risk of leakage or short circuit, thereby improving the performance and service life of the cable.

[0047] Example 3

[0048] Based on the above embodiment, it was found that when the outer layer of the cable is not broken, the cable will run for a long time and the cable core will be heated and expand thermally, which will over-squeeze the outer sheath and cause the risk of the outer sheath breaking, affecting the safety and life of the cable. In order to solve the above problem, this embodiment is specially invented.

[0049] like Figures 9 to 11 As shown, the buffer layer 3 includes a plurality of intermittently arranged protrusions 31 and recesses 32. The buffer layer 3 is made of elastic material. When the buffer layer 3 is squeezed, both ends of the buffer layer 3 will extend along the length direction of the cable.

[0050] During specific use, when the outer sheath 16 of the cable is not broken, the core conductor 11 will expand due to heat after long-term operation, thereby causing the protective layer 14 to expand and squeeze the buffer layer 3. When the buffer layer 3 is squeezed, the two ends of the buffer layer 3 will extend along the length of the cable to form a new layer of protection.

[0051] To sum up, through the setting of the buffer layer 3, when the outer sheath 16 of the cable is not broken, the core conductor 11 will expand due to the heat when it runs for a long time, thereby causing the protective layer 14 to expand and squeeze the buffer layer 3. When the buffer layer 3 is squeezed, the two ends of the buffer layer 3 will extend along the length of the cable to form a new layer of protection, preventing the cable core wire from thermally expanding due to heat, which will excessively squeeze the outer sheath and cause the risk of the outer sheath breaking, thereby improving the safety and life of the cable.

[0052] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A corrosion-resistant and oil-resistant cable, comprising a cable body, characterized in that: The cable body includes a core conductor, wherein a plurality of core conductors are provided, each of the core conductors is wrapped with an insulating layer, a plurality of the insulating layers are wrapped with a filling layer, a protective layer is wrapped with an armor layer on the outside of the protective layer, an outer sheath is wrapped with an armor layer on the outside of the armor layer, and a plurality of isolation layers and buffer layers are arranged between the armor layer and the protective layer and are equidistantly distributed along the length of the cable; The isolation layer includes a plurality of isolation blocks, which are equidistantly distributed around the circumference. A accommodating cavity is provided in each isolation block, an airbag is fixedly connected to each accommodating cavity, and oil-absorbing cotton is provided above each airbag, and each oil-absorbing cotton is slidably connected to the accommodating cavity.

2. A corrosion-resistant and oil-resistant cable according to claim 1, characterized in that: Each of the accommodating cavities and the airbag is filled with inert gas, and the inert gas in the accommodating cavity and the inert gas in the airbag are in a pressure equilibrium state.

3. A corrosion-resistant and oil-resistant cable according to claim 2, characterized in that: The buffer layer includes a plurality of intermittently arranged protrusions and depressions.

4. The corrosion-resistant and oil-resistant cable according to claim 3, characterized in that: The buffer layer is made of elastic material. When the buffer layer is squeezed, both ends of the buffer layer will extend along the length direction of the cable.

5. The corrosion-resistant and oil-resistant cable according to claim 4, characterized in that: When the oil on the outside of the cable body enters the accommodating cavity, it will be absorbed by the oil-absorbing cotton in the accommodating cavity.

6. The corrosion-resistant and oil-resistant cable according to claim 5, characterized in that: When the accommodating cavity is communicated with the outside, the inert gas in the accommodating cavity will be discharged, and the pressure balance between the inert gas in the accommodating cavity and the airbag will be broken.

7. The corrosion-resistant and oil-resistant cable according to claim 6, characterized in that: The inert gas in the airbag will expand due to the continuous heat generated by the operation of the core conductor. When the airbag expands, it will push the oil-absorbing cotton to move away from the buffer layer, so that the top of the oil-absorbing cotton is attached to the inner wall of the accommodating cavity and squeezes the oil-absorbing cotton to discharge the oil inside the oil-absorbing cotton and block the gap to prevent the oil from entering the accommodating cavity again.

8. The corrosion-resistant and oil-resistant cable according to claim 7, characterized in that: When the core conductor continues to generate heat during operation, the inert gas in the airbag will continue to expand due to the temperature of the core conductor.

9. The corrosion-resistant and oil-resistant cable according to claim 8, characterized in that: The expansion of the inert gas in the airbag is constrained by the armor layer and will squeeze the buffer layer inward. The buffer layer is squeezed by the airbag, and both ends of the buffer layer will extend along the length of the cable, thereby forming a new layer of protection for the cable.

10. The corrosion-resistant and oil-resistant cable according to claim 9, characterized in that: The materials used for the insulating layer, the protective layer and the outer protective layer are all environmentally friendly, oleophobic and wear-resistant materials.

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