Flexible anti-aging bending-resistant power cable

Abstract

The invention discloses a flexible anti-aging bending-resistant power cable, which relates to the field of cables and comprises a cable body, the cable body comprises a main cable, and two armor layers, namely an inner armor layer and an outer armor layer, are arranged outside the main cable; the inner armor layer comprises a first rubber armor pad and a second rubber armor pad, a first lining layer is arranged outside the main cable in a wrapping mode, and the first rubber armor pad and the second rubber armor pad are pressed on the outer ring of the first lining layer in an extrusion mode. The cable body is protected by the two armor layers, the mechanical force bearing capacity of the cable body is improved, and the two armor layers replace a metal protection mode in the prior art, so that the weight is reduced, the bending resistance of the cable body cannot be excessively high, the cable body has certain flexibility, and the service life of the cable body is prolonged. And laying and transportation are convenient.

Description

Technical Field

[0001] The present invention relates to the field of cables, in particular to a flexible, anti-aging and bending-resistant power cable. Background Art

[0002] The cable's armor layer generally allows the cable to withstand significant mechanical forces. It's typically a protective metal layer applied to the outermost layer of the product to prevent damage to the internal active layer during transportation and installation. Beneath the armor layer, there should be an extruded or wrapped inner liner of specified thickness. When lead-sheathed cables require armoring, a tape underlayment should be used. If an isolation sleeve is used beneath the armor layer, it can replace the inner liner or be added to it.

[0003] However, cables with armored layers usually have larger diameters, and cables with larger diameters are inherently less flexible. Adding metal protection makes the cables even less flexible. While this provides resistance to aging and bending, the high degree of resistance makes it impractical for laying and transporting cables. Therefore, it is necessary to propose a flexible, aging-resistant, and bend-resistant power cable to address this issue. Summary of the Invention

[0004] The object of the present invention is to provide a flexible, aging-resistant and bending-resistant power cable to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a flexible, anti-aging and bend-resistant power cable, comprising a cable body, wherein the cable body comprises a main cable, and the main cable is provided with two armor layers on the outside: an inner armor layer and an outer armor layer;

[0006] The inner armor layer includes a first rubber armor pad and a second rubber armor pad. The outside of the main cable is provided with a first inner lining layer by wrapping. The first rubber armor pad and the second rubber armor pad are pressed together on the outer circle of the first inner lining layer by extrusion.

[0007] The outer armor layer includes a third rubber armor pad, the outer rings of the first and second rubber armor pads are provided with a second inner lining layer by wrapping, and the third rubber armor pad is pressed on the outer ring of the second inner lining layer by extrusion;

[0008] The outer portion of the third rubber armor pad is provided with an outer lining layer by wrapping;

[0009] The first rubber armor pad is filled with fire extinguishing dry powder, and the second rubber armor pad is filled with fire extinguishing liquid.

[0010] Preferably, the third rubber armor pad is filled with carbon dioxide gas.

[0011] Preferably, the first rubber armor pad and the second rubber armor pad are arranged adjacent to each other, and the adjacent first rubber armor pad and the second rubber armor pad form a circular structure and are laid on the outer circle of the first inner lining layer, and multiple first rubber armor pads and second rubber armor pads are arranged along the length direction of the main cable.

[0012] Preferably, a plurality of the third rubber armor pads are provided, and the plurality of third rubber armor pads are arranged at equal distances along the length direction of the main cable, and four third rubber armor pads are provided on the outer periphery of the second inner lining layer.

[0013] Preferably, along the length direction of the main cable, adjacent third rubber armor pads, adjacent first rubber armor pads and adjacent second rubber armor pads are overlapped by a first limiting edge and a second limiting edge, and the first limiting edge and the second limiting edge are respectively fixedly arranged at the two ends of the corresponding third rubber armor pad, first rubber armor pad and second rubber armor pad.

[0014] Preferably, the first rubber armor pad, the second rubber armor pad and the third rubber armor pad are distributed alternately.

[0015] Preferably, along the radial plane of the main cable, a second gap is provided between adjacent third rubber armor pads; and a first gap is provided between adjacent first rubber armor pads and second rubber armor pads.

[0016] Preferably, both ends of the third rubber armor pad are provided with a first weak area, both ends of the second rubber armor pad are provided with a second weak area, and the inner wall of the first rubber armor pad is provided with atomizing spray holes.

[0017] Preferably, the first rubber armor pad, the second rubber armor pad and the third rubber armor pad are all extruded and pressed by special equipment;

[0018] The special equipment includes a winding processing equipment, a reel, an adjusting wheel and an extrusion pressing wheel. The cable body is wound by the winding processing equipment; side substrates are provided on both sides of the outlet of the winding processing equipment, and the middle parts of the adjusting wheel and the extrusion pressing wheel are rotatably connected to the first rotating shaft and the second rotating shaft respectively. The extruded layer on the reel passes through the gap between the adjusting wheel and the extrusion pressing wheel and is squeezed and pressed onto the outside of the cable body by the extrusion pressing wheel.

[0019] Preferably, an electric heating ring is provided inside the extrusion pressing wheel, a second support plate is fixedly provided on the side substrate, a second electric push rod is installed on the second support plate, a second adjustment plate is fixedly provided on the second electric push rod, the second rotating shaft is rotatably provided on the second adjusting plate, a groove is provided at the outer ring of the adjusting wheel, a pressure sensor is embedded in the groove, a first support plate is also fixedly provided on the side substrate, a first electric push rod is fixedly provided on the first support plate, the end of the first electric push rod is connected to the first adjustment plate, and the first rotating shaft is rotatably connected to the first adjusting plate.

[0020] Technical effects and advantages of the present invention:

[0021] 1. The cable body of the present invention is protected by two layers of armor, which increases the cable body's ability to withstand mechanical forces. The two layers of armor replace the metal protection method in the prior art, which not only reduces the weight but also ensures that the bending resistance of the cable body is not excessively high, making the cable body flexible and convenient for laying and transportation.

[0022] 2. When a fire occurs in the cable body, the internal temperature of the first rubber armor pad and the second rubber armor pad increases, and the air pressure also increases, making the second weak area and the atomizing nozzle hole easily broken; when the atomizing nozzle hole is broken, the dispersed fire extinguishing dry powder is sprayed out through the atomizing nozzle hole, and the fire extinguishing dry powder is discharged through the broken gaps on the second inner lining layer and the outer lining layer, and dispersed around the cable body, thereby blocking the fire source; and when the second weak area is broken, the fire-resistant liquid is squeezed out and infiltrated around the cable body, which not only has a flame retardant and insulating effect, but also can absorb the fire extinguishing dry powder, so that the fire extinguishing dry powder can be evenly covered on the outer surface of the cable body, thereby further blocking the fire source, and has strong practicality;

[0023] 3. A first weak zone is set at both ends of the third rubber armor pad. When the carbon dioxide gas inside the third rubber armor pad is heated, it expands. The continuous expansion force breaks the first weak zone, allowing the carbon dioxide gas to be discharged to the surrounding area of the cable body. By increasing the carbon dioxide content around the cable body, the impact of fire is reduced;

[0024] 4. Since multiple first rubber armor pads, second rubber armor pads, and third rubber armor pads are provided, when a section of the cable body is damaged, it is convenient to replace it later without replacing the entire cable, which reduces the cost of use.

[0025] 5. Due to the setting of the first gap and the second gap, there is enough avoidance space between the adjacent third rubber armor pad, the first rubber armor pad and the second rubber armor pad, and excessive wear will not occur, which is highly practical;

[0026] 6. Bond the first rubber armor pad and the second rubber armor pad to the surface of the adhesive layer, and bond the third rubber armor pad to the surface of another adhesive layer to form an extruded layer. Wrap the extruded layer around the outside of the unwinding drum. Unwind the extruded layer as the unwinding drum rotates. As the cable body moves on the winding processing equipment, the extruded layer adheres to the outer ring of the cable body. The extruded pressing wheel and the adjusting wheel rotate to assist in pressing the extruded layer. When the electric heating ring is started, it can heat-press the extruded layer, so that the adhesive layer is better adhered to the surface of the corresponding first inner liner layer or second inner liner layer.

[0027] 7. When the extruded layer passes through the outer ring of the adjusting wheel, the pressure of the extruded layer can enable the pressure sensor to monitor the corresponding pressure value. If the pressure value is low, it proves that the extruded layer is relatively loose, which is not conducive to the uniform fitting of the extruded layer on the cable body. Therefore, at this time, the first electric push rod can be used to drive the first adjusting plate to move, so that the adjusting wheel can tighten the extruded layer to a certain extent, thereby facilitating the adjustment of the fitting strength of the extruded layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of the flexible, anti-aging, and bending-resistant power cable of the present invention.

[0029] Figure 2 This is a cross-sectional view of the flexible, aging-resistant, and bending-resistant power cable of the present invention.

[0030] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure in the middle.

[0031] Figure 4 Schematic diagram of the inner armor layer structure of the present invention.

[0032] Figure 5 This is a schematic structural diagram of the first inner lining layer and the first rubber armor pad of the present invention.

[0033] Figure 6 This is a schematic structural diagram of the special equipment for producing the flexible, anti-aging and bending-resistant power cable of the present invention.

[0034] Figure 7 It is a schematic structural diagram of the regulating wheel and the extrusion pressing wheel of the present invention.

[0035] In the figure: 1. Cable body; 2. Main cable; 3. First inner lining layer; 4. First rubber armor pad; 5. Second rubber armor pad; 6. Second inner lining layer; 7. Third rubber armor pad; 8. Outer lining layer; 9. First gap; 10. Second gap; 11. First weak area; 12. Atomizing nozzle; 13. Second weak area; 14. First limiting edge; 15. Second limiting edge; 16. Wrapping processing equipment; 17. Unwinding drum; 18. Extruded layer; 19. Adjusting wheel; 20. Extruded pressing wheel; 21. Side substrate; 22. First rotating shaft; 23. First support plate; 24. First electric push rod; 25. First adjusting plate; 26. Pressure sensor; 27. Second support plate; 28. Second electric push rod; 29. Second adjusting plate; 30. Second rotating shaft; 31. Electric heating coil. DETAILED DESCRIPTION

[0036] The present invention provides Figure 1-Figure 7 A flexible, aging-resistant and bending-resistant power cable is shown, comprising a cable body 1, the cable body 1 comprising a main cable 2, and the outside of the main cable 2 is provided with two layers of armor: an inner armor layer and an outer armor layer; in the present invention, the cable body 1 is protected by two layers of armor layers, thereby increasing the ability of the cable body 1 to withstand mechanical forces, and the two layers of armor layers replace the method of providing metal protection in the prior art, which not only reduces the weight, but also enables the bending resistance of the cable body 1 not to be excessively high, so that the cable body 1 has a certain degree of flexibility and is convenient for laying and transportation.

[0037] Specifically: the inner armor layer includes a first rubber armor pad 4 and a second rubber armor pad 5, the first rubber armor pad 4 is filled with fire extinguishing dry powder, and the second rubber armor pad 5 is filled with flame retardant liquid. The outside of the main cable 2 is provided with a first inner lining layer 3 by wrapping, and the first rubber armor pad 4 and the second rubber armor pad 5 are pressed together at the outer circle of the first inner lining layer 3 by extrusion; both ends of the second rubber armor pad 5 are provided with a second weak area 13, and the inner wall of the first rubber armor pad 4 is provided with an atomizing spray hole 12; during operation, when a fire occurs in the cable body 1, due to the internal temperature of the first rubber armor pad 4 and the second rubber armor pad 5, As the temperature increases, the air pressure will also increase, making it easy for the second weak area 13 and the atomizing nozzle hole 12 to be broken; when the atomizing nozzle hole 12 is broken, the dispersed fire extinguishing dry powder is sprayed out through the atomizing nozzle hole 12, and the fire extinguishing dry powder is discharged through the broken gaps on the second inner lining layer 6 and the outer lining layer 8, and is dispersed around the cable body 1, thereby achieving the purpose of blocking the fire source; and when the second weak area 13 is broken, the fire-resistant liquid is squeezed out and infiltrated around the cable body 1, which not only has a flame retardant and insulating effect, but also can absorb the fire extinguishing dry powder, so that the fire extinguishing dry powder can be evenly covered on the outer surface of the cable body 1, thereby further blocking the fire source, and has strong practicality.

[0038] The outer armor layer includes a third rubber armor pad 7, which is filled with carbon dioxide gas. The outer circles of the first rubber armor pad 4 and the second rubber armor pad 5 are provided with a second inner lining layer 6 by wrapping, and the third rubber armor pad 7 is pressed on the outer circle of the second inner lining layer 6 by extrusion. Both ends of the third rubber armor pad 7 are provided with a first weak area 11. When the carbon dioxide gas inside the third rubber armor pad 7 is heated, it expands. The continuous expansion force breaks the first weak area 11, thereby allowing the carbon dioxide gas to be discharged to the surrounding area of the cable body 1, thereby reducing the impact of the fire by increasing the carbon dioxide content around the cable body 1.

[0039] The outer portion of the third rubber armor pad 7 is provided with an outer lining layer 8 by wrapping, and the outer lining layer 8 plays a role of peripheral protection.

[0040] The first rubber armor pad 4 and the second rubber armor pad 5 are arranged adjacent to each other, and the adjacent first rubber armor pad 4 and the second rubber armor pad 5 form a ring structure and are laid on the outer circle of the first inner lining layer 3, and the first rubber armor pad 4 and the second rubber armor pad 5 are arranged in plurality along the length direction of the main cable 2; the third rubber armor pad 7 is provided in plurality, and the plurality of third rubber armor pads 7 are arranged at equal distances along the length direction of the main cable 2, and four third rubber armor pads 7 are provided on the outer periphery of the second inner lining layer 6; along the length direction of the main cable 2, the corresponding The adjacent third rubber armor pad 7, the adjacent first rubber armor pad 4 and the adjacent second rubber armor pad 5 are overlapped by the first limiting edge 14 and the second limiting edge 15. The first limiting edge 14 and the second limiting edge 15 are respectively fixedly arranged at the two ends of the corresponding third rubber armor pad 7, the first rubber armor pad 4 and the second rubber armor pad 5. Since multiple first rubber armor pads 4, second rubber armor pads 5 and third rubber armor pads 7 are provided, when a section of the cable body 1 is damaged, it is convenient to replace it later without replacing the entire cable, and the use cost is low.

[0041] The first rubber armor pad 4 , the second rubber armor pad 5 and the third rubber armor pad 7 are staggeredly distributed, which effectively increases the overall strength of the cable body 1 .

[0042] Along the radial plane of the main cable 2, a second gap 10 is provided between adjacent third rubber armor pads 7; a first gap 9 is provided between adjacent first rubber armor pads 4 and second rubber armor pads 5. When the cable body 1 is bent, due to the setting of the first gap 9 and the second gap 10, there is sufficient avoidance space between the adjacent third rubber armor pads 7, first rubber armor pads 4 and second rubber armor pads 5, and excessive wear will not occur, which is highly practical.

[0043] The present invention also discloses a special equipment, wherein the first rubber armor pad 4, the second rubber armor pad 5 and the third rubber armor pad 7 are all extruded and pressed by the special equipment; the special equipment includes a wrapping processing equipment 16, a reel 17, an adjusting wheel 19 and an extrusion pressing wheel 20, and the cable body 1 is wrapped by the wrapping processing equipment 16; side substrates 21 are provided on both sides of the outlet of the wrapping processing equipment 16, and the middle parts of the adjusting wheel 19 and the extrusion pressing wheel 20 are respectively rotatably connected to the first rotating shaft 22 and the second rotating shaft 30, and the extruded layer 18 on the reel 17 passes through the gap between the adjusting wheel 19 and the extrusion pressing wheel 20 and is extruded and pressed on the outside of the cable body 1 by the extrusion pressing wheel 20.

[0044] An electric heating ring 31 is provided inside the extrusion pressing wheel 20, a second support plate 27 is fixedly provided on the side substrate 21, a second electric push rod 28 is installed on the second support plate 27, a second adjustment plate 29 is fixedly provided on the second electric push rod 28, a second rotating shaft 30 is rotatably provided on the second adjusting plate 29, a groove is provided at the outer ring of the adjusting wheel 19, a pressure sensor 26 is embedded in the groove, a first support plate 23 is also fixedly provided on the side substrate 21, a first electric push rod 24 is fixedly provided on the first support plate 23, the end of the first electric push rod 24 is connected to the first adjustment plate 25, and the first rotating shaft 22 is rotatably connected to the first adjusting plate 25.

[0045] During operation, the first rubber armor pad 4 and the second rubber armor pad 5 are bonded to the surface of the rubber layer, and the third rubber armor pad 7 is bonded to the surface of another rubber layer to form an extruded layer 18. The extruded layer 18 is wound around the outside of the unwinding drum 17. When the unwinding drum 17 rotates, the extruded layer 18 is unwound. As the cable body 1 moves on the winding processing equipment 16, the extruded layer 18 is attached to the outer ring of the cable body 1. The extruded pressure wheel 20 and the adjusting wheel 19 rotate to assist in pressing the extruded layer 18. Among them, the electric heating ring 31 can hot-press the extruded layer 18 when it is started, so that the rubber layer can better adhere to the surface of the corresponding first inner lining layer 3 or the second inner lining layer 6.

[0046] Among them, by controlling the second electric push rod 28 to start and drive the second adjustment plate 29 to move, the distance between the extrusion pressing wheel 20 and the cable body 1 can be changed, which is convenient for processing cable bodies 1 of different diameters on the same equipment and for processing the second layer of armor.

[0047] It should be noted that when the extruded layer 18 passes through the outer circle of the adjusting wheel 19, the pressure of the extruded layer 18 can enable the pressure sensor 26 to monitor the corresponding pressure value. If the pressure value is low, it proves that the extruded layer 18 is relatively loose, which is not conducive to the uniform fitting of the extruded layer 18 on the cable body 1. Therefore, at this time, the first electric push rod 24 can be used to drive the first adjusting plate 25 to move, so that the adjusting wheel 19 can tighten the extruded layer 18 to a certain extent, thereby facilitating the adjustment of the fitting strength of the extruded layer 18.

Claims

1. A flexible, anti-aging and anti-bending power cable, comprising a cable body (1), characterized in that: The cable body (1) comprises a main cable (2), and the outside of the main cable (2) is provided with two armor layers: an inner armor layer and an outer armor layer; The inner armor layer comprises a first rubber armor pad (4) and a second rubber armor pad (5); a first inner lining layer (3) is provided on the outside of the main cable (2) by wrapping; the first rubber armor pad (4) and the second rubber armor pad (5) are pressed together at the outer circle of the first inner lining layer (3) by extrusion; The outer armor layer includes a third rubber armor pad (7), the outer rings of the first rubber armor pad (4) and the second rubber armor pad (5) are provided with a second inner lining layer (6) by wrapping, and the third rubber armor pad (7) is pressed onto the outer ring of the second inner lining layer (6) by extrusion. The outside of the third rubber armor pad (7) is provided with an outer lining layer (8) by wrapping; The first rubber armor pad (4) is filled with fire extinguishing dry powder, and the second rubber armor pad (5) is filled with fire-resistant liquid.

2. The flexible, aging-resistant and bending-resistant power cable according to claim 1, characterized in that: The third rubber armor pad (7) is filled with carbon dioxide gas.

3. The flexible, aging-resistant and bending-resistant power cable according to claim 1, characterized in that: The first rubber armor pad (4) and the second rubber armor pad (5) are arranged adjacent to each other, and the adjacent first rubber armor pads (4) and second rubber armor pads (5) form a circular ring structure and are laid on the outer ring of the first inner lining layer (3), and a plurality of the first rubber armor pads (4) and the second rubber armor pads (5) are arranged along the length direction of the main cable (2).

4. The flexible, anti-aging and bending-resistant power cable according to claim 3, characterized in that: A plurality of the third rubber armor pads (7) are provided, and the plurality of third rubber armor pads (7) are arranged at equal distances along the length direction of the main cable (2), and four third rubber armor pads (7) are provided on the outer periphery of the second inner lining layer (6).

5. The flexible, aging-resistant and bending-resistant power cable according to claim 4, characterized in that: Along the length direction of the main cable (2), adjacent third rubber armor pads (7), adjacent first rubber armor pads (4), and adjacent second rubber armor pads (5) are overlapped by a first limiting edge (14) and a second limiting edge (15), and the first limiting edge (14) and the second limiting edge (15) are respectively fixedly arranged at the two ends of the corresponding third rubber armor pad (7), first rubber armor pad (4), and second rubber armor pad (5).

6. The flexible, aging-resistant and bending-resistant power cable according to claim 1, characterized in that: The first rubber armor pad (4), the second rubber armor pad (5) and the third rubber armor pad (7) are distributed in an alternating manner.

7. The flexible, aging-resistant and bending-resistant power cable according to claim 1, characterized in that: Along the radial plane of the main cable (2), a second gap (10) is provided between adjacent third rubber armor pads (7); and a first gap (9) is provided between adjacent first rubber armor pads (4) and second rubber armor pads (5).

8. The flexible, aging-resistant and bending-resistant power cable according to claim 1, characterized in that: Both ends of the third rubber armor pad (7) are provided with a first weak area (11), both ends of the second rubber armor pad (5) are provided with a second weak area (13), and an atomizing spray hole (12) is provided on the inner wall of the first rubber armor pad (4).

9. The flexible, aging-resistant and bending-resistant power cable according to claim 1, characterized in that: The first rubber armor pad (4), the second rubber armor pad (5) and the third rubber armor pad (7) are all extruded and pressed together by special equipment; The special equipment comprises a wrapping processing device (16), a reel (17), an adjusting wheel (19) and an extrusion pressing wheel (20); the cable body (1) is wrapped by the wrapping processing device (16); side substrates (21) are provided on both sides of the outlet of the wrapping processing device (16); the middle parts of the adjusting wheel (19) and the extrusion pressing wheel (20) are rotatably connected to a first rotating shaft (22) and a second rotating shaft (30), respectively; the extruded layer (18) on the reel (17) passes through the gap between the adjusting wheel (19) and the extrusion pressing wheel (20) and is squeezed and pressed onto the outside of the cable body (1) by the extrusion pressing wheel (20).

10. The flexible, anti-aging and bending-resistant power cable according to claim 9, characterized in that: An electric heating ring (31) is provided inside the extrusion pressing wheel (20), a second support plate (27) is fixedly provided on the side substrate (21), a second electric push rod (28) is installed on the second support plate (27), a second adjustment plate (29) is fixedly provided on the second electric push rod (28), the second rotating shaft (30) is rotatably provided on the second adjustment plate (29), a groove is provided at the outer ring of the adjustment wheel (19), a pressure sensor (26) is embedded in the groove, a first support plate (23) is also fixedly provided on the side substrate (21), a first electric push rod (24) is fixedly provided on the first support plate (23), an end of the first electric push rod (24) is connected to the first adjustment plate (25), and the first rotating shaft (22) is rotatably connected to the first adjustment plate (25).

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