Flexible, anti-aging, bend-resistant power cable

Abstract

The application discloses a kind of flexible anti-aging bending-resistant power cables, it is related to cable field, including cable body, cable body includes main cable, the outside of main cable is provided with two layers of armored layer: inner armored layer and peripheral armored layer;Inner armored layer includes first rubber armored pad and second rubber armored pad, the outside of main cable is provided with first layer lining by wrapping, and first rubber armored pad and second rubber armored pad are extruded in the outer circle of first layer lining with the mode of extrusion package.It is protected by two layers of armored layer in the application, increase the ability of cable body to bear mechanical force, and two layers of armored layer replace the mode of setting metal protection in the prior art, not only reduce the weight, and can make the bending-resistant ability of cable body not excessively high, so that cable body gives consideration to certain flexibility, it is convenient to lay and transport.

Description

Technical Field

[0001] This invention relates to the field of cables, and in particular to a flexible, anti-aging, and bend-resistant power cable. Background Technology

[0002] The armor layer of a cable generally enables it to withstand significant mechanical forces. It typically consists of an outermost layer of metal protection to prevent damage to the inner functional layer during transportation and installation. Beneath the forged armor layer should be an extruded or wrapped inner liner of specified thickness. When lead-sheathed cables require armoring, a padding tape should be used. If an insulating sleeve is used under the armor layer, it can replace the inner liner or be added to it.

[0003] However, cables with armor layers are typically large in diameter, and large-diameter cables are inherently difficult to bend. Adding metal protection makes the cable even less flexible. While this provides anti-aging and bend resistance, the high degree of bend resistance makes it impractical for laying and transporting cables. Therefore, it is necessary to propose a flexible, anti-aging, and bend-resistant power cable to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a flexible, anti-aging, and bend-resistant power cable to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, 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: 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 main cable is provided with a first inner liner layer by wrapping. The first rubber armor pad and the second rubber armor pad are pressed together at the outer ring of the first inner liner layer by extrusion.

[0007] The outer armor layer includes a third rubber armor pad, and a second inner liner is provided around the outer ring of the first and second rubber armor pads by wrapping. The third rubber armor pad is pressed into the outer ring of the second inner liner by extrusion.

[0008] The third rubber armor pad has an outer liner layer wrapped around its exterior.

[0009] The first rubber armored pad is filled with fire extinguishing dry powder, and the second rubber armored pad is filled with fire-retardant 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 ring structure and are laid on the outer ring of the first inner liner layer. Multiple first rubber armor pads and second rubber armor pads are arranged along the length direction of the main cable.

[0012] Preferably, multiple third rubber armor pads are provided, and the multiple third rubber armor pads are arranged at equal intervals along the length direction of the main cable, and four third rubber armor pads are provided on the outer periphery of the second inner liner.

[0013] Preferably, along the length 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, which are respectively fixed at both 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, the third rubber armor pad has a first weak area at both ends, the second rubber armor pad has a second weak area at both ends, and the inner wall of the first rubber armor pad has atomizing spray holes.

[0017] Preferably, the first rubber armored pad, the second rubber armored pad, and the third rubber armored pad are all extruded and pressed together using specialized equipment;

[0018] The special equipment includes a wrapping processing device, an unwinding drum, an adjusting wheel, and an extrusion pressing wheel. The cable body is wrapped by the wrapping processing device. Side base plates are provided on both sides of the outlet of the wrapping processing device. The middle parts of the adjusting wheel and the extrusion pressing wheel are respectively rotatably connected to a first rotating shaft and a second rotating shaft. The extruded layer on the unwinding drum passes through the gap between the adjusting wheel and the extrusion pressing wheel and is extruded and pressed onto the outside of the cable body by the extrusion pressing wheel.

[0019] Preferably, the extrusion pressing wheel is provided with an electric heating coil inside, a second support plate is fixedly provided on the side base plate, a second electric push rod is mounted on the second support plate, a second adjusting 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 on 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 base plate, 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 adjusting plate, and the first rotating shaft is rotatably connected to the first adjusting plate.

[0020] The technical effects and advantages of this invention are as follows:

[0021] 1. In this invention, the cable body is protected by two layers of armor, which increases the cable body's ability to withstand mechanical forces. Moreover, the two layers of armor replace the metal protection method used in the prior art, which not only reduces the weight but also prevents the cable body's bending resistance from being excessively high, thus allowing the cable body to have a certain degree of flexibility, making it convenient for laying and transportation.

[0022] 2. When a fire occurs in the cable body, the internal temperature and air pressure of the first and second rubber armor pads increase, making the second weak point and the atomizing nozzle easily ruptured. When the atomizing nozzle is ruptured, dispersed fire extinguishing dry powder is sprayed out through the atomizing nozzle. The fire extinguishing dry powder is discharged through the ruptured gaps in the second inner and outer lining layers, dispersing around the cable body, thereby blocking the fire source. When the second weak point is ruptured, flame-retardant liquid is squeezed out and soaks around the cable body, which not only has flame-retardant and insulation effects, but also absorbs the fire extinguishing dry powder, allowing the fire extinguishing dry powder to evenly cover the outer surface of the cable body, thereby further blocking the fire source. It is highly practical.

[0023] 3. Both ends of the third rubber armor pad are provided with a first weak zone. When the carbon dioxide gas inside the third rubber armor pad is heated, it expands. The continuous expansion force will break the first weak zone, thereby allowing the carbon dioxide gas to be discharged to the area around the cable body. This will reduce the impact of fire by increasing the carbon dioxide content around the cable body.

[0024] 4. Since multiple first, second, and third rubber armor pads are provided, it is convenient to replace a section of the cable after it is damaged, without having to replace the entire cable, resulting in low operating costs.

[0025] 5. Due to the setting of the first gap and the second gap, there is enough clearance between the adjacent third rubber armor pad, the first rubber armor pad and the second rubber armor pad, so that excessive wear will not occur, and the practicality is strong.

[0026] 6. The first and second rubber armor pads are bonded to the surface of the adhesive layer, and the third rubber armor pad is also bonded to the surface of another adhesive layer to form an extruded layer. The extruded layer is wound around the outside of the unwinding drum. When the unwinding drum rotates, the extruded layer is unwound. As the cable body moves on the wrapping processing equipment, the extruded layer adheres to the outer ring of the cable body. The extrusion pressing wheel and adjusting wheel rotate to assist in pressing the extruded layer. When the electric heating coil is activated, it can perform hot pressing on the extruded layer, so that the adhesive layer adheres better to the surface of the corresponding first or second inner lining layer.

[0027] 7. When the extruded layer passes the outer ring of the adjusting wheel, the pressure sensor can detect the corresponding pressure value due to the pressure of the extruded layer. If the pressure value is low, it means that the extruded layer is relatively loose, which is not conducive to the extruded layer being evenly attached to the cable body. Therefore, at this time, the first adjusting plate can be moved by the first electric push rod to make the adjusting wheel tighten the extruded layer to a certain extent, so as to adjust the adhesion force of the extruded layer. Attached Figure Description

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

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

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

[0031] Figure 4 This is a schematic diagram of the inner armor layer structure of the present invention.

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

[0033] Figure 6 This is a schematic diagram of the special equipment for manufacturing flexible, anti-aging, and bend-resistant power cables according to the present invention.

[0034] Figure 7 This is a schematic diagram of the adjusting wheel and the extrusion clamping wheel of the present invention.

[0035] In the diagram: 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. Extrusion layer; 19. Adjusting wheel; 20. Extrusion pressing wheel; 21. Side base plate; 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 Implementation

[0036] This invention provides, for example Figures 1-7 The invention discloses a flexible, anti-aging, and bend-resistant power cable, comprising a cable body 1, which includes a main cable 2. The main cable 2 is provided with two armor layers: an inner armor layer and an outer armor layer. In this invention, the cable body 1 is protected by two armor layers, which increases the cable body 1's ability to withstand mechanical forces. Moreover, the two armor layers replace the metal protection method used in the prior art, which not only reduces the weight but also prevents the bending resistance of the cable body 1 from being excessively high, thus allowing the cable body 1 to maintain a certain degree of flexibility, facilitating 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 fire-retardant liquid. The main cable 2 is surrounded by a first inner lining layer 3. The first rubber armor pad 4 and the second rubber armor pad 5 are pressed together at the outer ring of the first inner lining layer 3 by extrusion. Second weak points 13 are provided at both ends of the second rubber armor pad 5. Atomizing nozzles 12 are provided on the inner wall of the first rubber armor pad 4. During operation, when a fire occurs in the cable body 1, the internal temperature of the first rubber armor pad 4 and the second rubber armor pad 5... As the temperature increases, the air pressure also increases, making the second weak zone 13 and the atomizing nozzle 12 more susceptible to rupture. When the atomizing nozzle 12 is ruptured, dispersed fire extinguishing dry powder is sprayed out through it. The fire extinguishing dry powder is discharged through the ruptured gaps in the second inner lining layer 6 and the outer lining layer 8, dispersing around the cable body 1, thereby blocking the fire source. When the second weak zone 13 is ruptured, flame-retardant liquid is squeezed out and soaks around the cable body 1, which not only provides flame retardancy and insulation but also absorbs the fire extinguishing dry powder, allowing it to evenly cover the outer surface of the cable body 1, further blocking the fire source. This method is highly practical.

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

[0039] Among them, the outer liner 8 is provided on the outside of the third rubber armor pad 7 by wrapping, and the outer liner 8 serves as an outer protection layer.

[0040] The first rubber armor pad 4 and the second rubber armor pad 5 are arranged adjacent to each other, forming a circular structure on the outer ring of the first inner liner 3. Multiple first rubber armor pads 4 and 5 are arranged along the length of the main cable 2. Multiple third rubber armor pads 7 are arranged at equal intervals along the length of the main cable 2, and four third rubber armor pads 7 are arranged on the outer periphery of the second inner liner 6. Along the length of the main cable 2, the... The adjacent third rubber armor pad 7, the adjacent first rubber armor pad 4, and the adjacent second rubber armor pad 5 are connected 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 set at both ends of the corresponding third rubber armor pad 7, first rubber armor pad 4, and second rubber armor pad 5. Since there are multiple first rubber armor pads 4, second rubber armor pads 5, and third rubber armor pads 7, it is convenient to replace a section of the cable body 1 after it is damaged, without having to replace the entire cable, thus reducing the cost of use.

[0041] The first rubber armor pad 4, the second rubber armor pad 5, and the third rubber armor pad 7 are distributed alternately, 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 bends, due to the provision of the first gap 9 and the second gap 10, there is sufficient clearance between adjacent third rubber armor pads 7, first rubber armor pads 4 and second rubber armor pads 5, and excessive wear will not occur, making it highly practical.

[0043] The present invention also discloses a special equipment, in which 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 the special equipment; the special equipment includes a wrapping processing device 16, an unwinding drum 17, an adjusting wheel 19, and an extrusion pressing wheel 20, and the cable body 1 is wrapped by the wrapping processing device 16; side plates 21 are provided on both sides of the outlet of the wrapping processing device 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 unwinding drum 17 passes through the gap between the adjusting wheel 19 and the extrusion pressing wheel 20 and is extruded and pressed onto the outside of the cable body 1 by the extrusion pressing wheel 20.

[0044] An electric heating coil 31 is provided inside the extrusion clamping roller 20. A second support plate 27 is fixedly provided on the side base plate 21. A second electric push rod 28 is installed on the second support plate 27. A second adjusting 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 on the outer ring of the adjusting roller 19. A pressure sensor 26 is embedded in the groove. A first support plate 23 is also fixedly provided on the side base plate 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 adjusting plate 25. A 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 adhesive layer, and the third rubber armor pad 7 is also bonded to the surface of another adhesive 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 wrapping processing equipment 16, the extruded layer 18 adheres to the outer ring of the cable body 1. The extrusion pressing wheel 20 and the adjusting wheel 19 rotate to assist in pressing the extruded layer 18. When the electric heating coil 31 is activated, it can perform hot pressing on the extruded layer 18, so that the adhesive layer adheres better to the surface of the corresponding first inner lining layer 3 or second inner lining layer 6.

[0046] The distance between the extrusion clamping roller 20 and the cable body 1 can be changed by controlling the second electric push rod 28 to start and drive the second adjusting plate 29 to move. This makes it easier to process cable bodies 1 of different diameters on the same equipment as well as for processing the second armor layer.

[0047] It should be noted that when the extruded layer 18 passes the outer ring of the adjusting wheel 19, the pressure of the extruded layer 18 enables the pressure sensor 26 to detect the corresponding pressure value. If the pressure value is low, it indicates that the extruded layer 18 is relatively loose, which is not conducive to the extruded layer 18 being evenly attached to the cable body 1. Therefore, at this time, the first adjusting plate 25 can be moved by the first electric push rod 24, so that the adjusting wheel 19 can tighten the extruded layer 18 to a certain extent, which is convenient for adjusting the adhesion of the extruded layer 18.

Claims

1. A flexible, anti-aging, and bend-resistant power cable, comprising a cable body (1), characterized in that: The cable body (1) includes a main cable (2), and the main cable (2) is provided with two armor layers: an inner armor layer and an outer armor layer. The inner armor layer includes a first rubber armor pad (4) and a second rubber armor pad (5). The main cable (2) is provided with a first inner lining layer (3) by wrapping. The first rubber armor pad (4) and the second rubber armor pad (5) are pressed together at the outer ring of the first inner lining layer (3) by extrusion. The outer armor layer includes a third rubber armor pad (7), and a second inner liner (6) is provided at the outer ring of the first rubber armor pad (4) and the second rubber armor pad (5) by wrapping. The third rubber armor pad (7) is pressed into the outer ring of the second inner liner (6) by extrusion. The third rubber armor pad (7) is provided with an outer liner (8) by wrapping around it. The first rubber armored pad (4) is filled with fire extinguishing dry powder, and the second rubber armored pad (5) is filled with fire-retardant liquid. The third rubber armor pad (7) is filled with carbon dioxide gas; The first rubber armor pad (4) and the second rubber armor pad (5) are arranged adjacent to each other. The adjacent first rubber armor pad (4) and the second rubber armor pad (5) form a ring structure and are laid on the outer ring of the first inner lining layer (3). Multiple first rubber armor pads (4) and second rubber armor pads (5) are arranged along the length direction of the main cable (2). The third rubber armor pad (7) is provided in multiple ways. The multiple 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 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 connected by a first limiting edge (14) and a second limiting edge (15). The first limiting edge (14) and the second limiting edge (15) are respectively fixed at both ends of the corresponding third rubber armor pads (7), first rubber armor pads (4) and second rubber armor pads (5). The first rubber armor pad (4), the second rubber armor pad (5), and the third rubber armor pad (7) are distributed alternately; Along the radial plane of the main cable (2), the third rubber armor pad (7) has a first weak area (11) at both ends, the second rubber armor pad (5) has a second weak area (13) at both ends, and the inner wall of the first rubber armor pad (4) has an atomizing nozzle (12).

2. The flexible, anti-aging, and bend-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); a first gap (9) is provided between adjacent first rubber armor pads (4) and second rubber armor pads (5).

3. The flexible, anti-aging, and bend-resistant power cable according to claim 1, characterized in that: The first rubber armored pad (4), the second rubber armored pad (5) and the third rubber armored pad (7) are all extruded and pressed together using special equipment; The special equipment includes a wrapping processing device (16), an unwinding drum (17), an adjusting wheel (19), and an extrusion pressing wheel (20). The cable body (1) is wrapped by the wrapping processing device (16). Side plates (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 respectively rotatably connected to a first rotating shaft (22) and a second rotating shaft (30). The extrusion layer (18) on the unwinding drum (17) passes through the gap between the adjusting wheel (19) and the extrusion pressing wheel (20) and is extruded and pressed onto the outside of the cable body (1) by the extrusion pressing wheel (20).

4. The flexible, anti-aging, and bend-resistant power cable according to claim 3, characterized in that: An electric heating coil (31) is provided inside the extrusion pressing wheel (20). A second support plate (27) is fixedly provided on the side base plate (21). A second electric push rod (28) is installed on the second support plate (27). A second adjusting plate (29) is fixedly provided on the second electric push rod (28). The second rotating shaft (30) is rotatably provided on the second adjusting plate (29). A groove is provided on 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 base plate (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 adjusting plate (25). The first rotating shaft (22) is rotatably connected to the first adjusting plate (25).

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