Tensile-resistant, flexible-resistant power cable

Abstract

The application provides a tensile type bending-resistant power cable, and relates to the technical field of power cables, which comprises a core, a wrapping structure and an auxiliary assembly; the wrapping structure is arranged on the surface of the core, and the auxiliary assembly is arranged on the surface of the wrapping structure; the wrapping structure comprises a connecting ring, a buffer bag and a mounting ring; the connecting ring is fixedly connected to the surface of the core, and the mounting ring is coaxially arranged on the outer side of the connecting ring. Through the cooperation of the wrapping structure and the auxiliary assembly, the buffer bag filled with carbon dioxide, the spring and the slip ring structure are utilized to realize graded buffering and distributed tensile resistance, the bending resistance and tensile strength are greatly improved, carbon dioxide is filled in the buffer bag, so that the buffer bag can release gas to inhibit the fire when overheating, built-in fire safety is provided, and the efficient heat dissipation path from the inside of the core to the surface of the core is formed by the heat-conducting silicon rubber constituting the heat-conducting plate, the pull plate and the heat dissipation fins, so that the heat accumulation is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, and in particular to a tensile-resistant and flexural-resistant power cable. Background Technology

[0002] Power cables, as a key carrier of electrical energy transmission, are widely used in power systems, industrial production, and urban infrastructure. In many application scenarios, cables need to move frequently, bend, or withstand certain tensile stresses, such as in dynamic operating environments like robot joints, power supply for mobile devices, port cranes, and mining machinery. These conditions place extremely high demands on the tensile strength, flexural strength, and long-term safety and reliability of the cables.

[0003] Currently, conventional power cables typically consist of a conductor, an insulation layer, and a cross-linked polyethylene insulation sheath. The cross-linked polyethylene insulation sheath is mainly used to increase the cable's abrasion resistance. In order to improve mechanical performance, existing cables may use an additional armor layer or high-strength aramid fiber braid as reinforcement.

[0004] However, existing tensile or flexural cables still have some shortcomings: First, under frequent or severe bending, excessive stress concentration can easily occur in the cable core, leading to metal fatigue, insulation wear, or even breakage, posing risks of short circuits and overheating. Second, traditional reinforced structures often focus on single tensile or bending performance, making it difficult to provide balanced and effective protection under the combined effects of dynamic bending and tension, and the structure is relatively rigid, which may affect the cable's flexibility. Furthermore, if the heat generated by the cable during overload or abnormal operation cannot be dissipated in time, it will accelerate insulation aging and even cause safety accidents such as spontaneous combustion. Conventional cables have limited heat dissipation paths, especially under multi-layered protective structures, where internal heat is difficult to dissipate quickly.

[0005] Therefore, those skilled in the art have proposed a tensile-resistant and flexural-resistant power cable to solve the problems mentioned above. Summary of the Invention

[0006] To address the technical problems of existing power cables having poor tensile or flexural strength, and the fact that existing power cables using armor layers or high-strength aramid fiber braids as reinforcements are prone to heat generation during overload or abnormal operation, which can accelerate insulation aging and even cause safety accidents such as spontaneous combustion, this invention provides a tensile-resistant and flexural-resistant power cable.

[0007] The technical solutions provided by the embodiments of the present invention are as follows: This invention provides a tensile-resistant and flexural-resistant power cable, comprising: a conductor, a sheathing structure, and auxiliary components; The wrapping structure is disposed on the surface of the wire core, and the auxiliary component is disposed on the surface of the wrapping structure; The encapsulation structure includes a connecting ring, a buffer bladder, and a mounting ring; The connecting ring is fixedly connected to the surface of the wire core, the mounting ring is coaxially disposed on the outside of the connecting ring, and the buffer bladder is evenly disposed between the mounting ring and the connecting ring.

[0008] The auxiliary components include several support plates and elastic strips; Several support plates are arranged in a ring on the inner side of the outer shell. One end of each support plate is fixedly connected to the inner wall of the outer shell, and the other end of each support plate is fixedly connected to the surface of the mounting ring. The elastic strips are fixedly connected to the inside of the support plates and are evenly distributed. The auxiliary components also include a retaining ring, a housing, a slip ring, and a spring; The outer shell is coaxially disposed on the outside of the wire core, the wrapping structure is coaxially disposed on the inside of the outer shell, and the two fixing rings are respectively fixedly connected to both ends of the outer shell; The two outer shells are joined together by adjacent fixed rings. A slip ring is fixedly connected to one end of one of the fixed rings and extends through the inner wall of the adjacent fixed ring, slidingly connected to the inner wall of the fixed ring. One end of the spring is fixedly connected to the surface of the slip ring, and the other end of the spring is fixedly connected to the inner wall of the fixed ring without a slip ring. This arrangement of fixed rings, slip rings, and springs allows the two adjacent fixed rings to separate during a pulling motion. During this process, the slip ring can block the gap between them, while simultaneously compressing the spring. Furthermore, the surface of the buffer bladder is fixedly connected with evenly distributed support blocks, and the buffer bladder is fixedly connected to the connecting ring and the mounting ring through the support blocks.

[0009] Furthermore, the interior of the buffer bladder is filled with carbon dioxide gas.

[0010] Furthermore, the support plate has staggered grooves on both sides.

[0011] Furthermore, the auxiliary components also include several heat-conducting plates and pull plates; Several heat-conducting plates are disposed inside the outer shell and are staggered with the support plate. One end of each heat-conducting plate passes through the mounting ring, the connecting ring, the wire core mounting ring, and the connecting ring in sequence and is inserted into the inside of the wire core. The pull plate is fixedly connected to the heat-conducting plate located inside the wire core and is arranged in an arc shape.

[0012] Furthermore, the surface of the outer shell is provided with annularly distributed connecting grooves, and the end of the heat-conducting plate away from the pull plate extends into the interior of the connecting groove. The surface of the end of the heat-conducting plate away from the pull plate is fixedly connected with uniformly distributed heat dissipation fins located inside the connecting groove.

[0013] Furthermore, the heat-conducting plate, the pull plate, and the heat dissipation fins are all made of thermally conductive silicone rubber material.

[0014] Furthermore, the elastic strip is made of shape memory alloy material, and the support plate is made of aramid fiber material.

[0015] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: In this invention, through the cooperation of the encapsulation structure and auxiliary components, the use of a buffer bladder filled with carbon dioxide, a spring and a slip ring structure to achieve graded buffering and distributed tensile strength greatly improves flexural strength and tensile strength. Furthermore, by filling the buffer bladder with carbon dioxide, it can release gas to suppress fire when overheated, providing built-in fire safety. At the same time, the use of thermally conductive silicone rubber to form a heat-conducting plate, a pull plate and heat dissipation fins creates an efficient heat dissipation path from the inside of the wire core to the outer surface, effectively preventing heat accumulation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a tensile-resistant and flexural-resistant power cable provided in an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional schematic diagram of a tensile-resistant and flexural-resistant power cable provided in an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram showing the distribution of a tensile-resistant and flexural-resistant power cable slip ring, fixing ring, and spring, provided for an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram showing the distribution of the buffer bladder in a tensile-resistant and flexural-resistant power cable, as provided in an embodiment of the present invention.

[0021] Figure 5 For the present invention Figure 4 A magnified view of A in the middle.

[0022] Figure 6 This is a connection structure diagram of a heat-conducting plate and a pull plate for a tensile-resistant and flexible power cable, provided in an embodiment of the present invention.

[0023] Figure 7 For the present invention Figure 6 A magnified view of B in the middle.

[0024] Figure 8 This is a structural diagram showing the distribution of a tensile-resistant and flexural-resistant power cable support plate, elastic strip, and groove, provided for an embodiment of the present invention.

[0025] Reference numerals: 1. Core wire; 2. Wrapping structure; 201. Connecting ring; 202. Buffer bag; 203. Support block; 204. Mounting ring; 3. Auxiliary component; 301. Fixing ring; 302. Slip ring; 303. Spring; 304. Outer shell; 305. Heat-conducting plate; 306. Pull plate; 307. Heat dissipation fins; 308. Connecting groove; 309. Support plate; 310. Groove; 311. Elastic strip.

[0026] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0027] The technical solutions of the present invention will now be described with reference to the accompanying drawings. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0028] like Figures 1 to 8 As shown, an embodiment of the present invention provides a tensile-resistant and flexural-resistant power cable, comprising: a conductor 1, a sheathing structure 2, and auxiliary components 3; The wrapping structure 2 is disposed on the surface of the wire core 1, and the auxiliary component 3 is disposed on the surface of the wrapping structure 2; The package structure 2 includes a connecting ring 201, a buffer bladder 202, and a mounting ring 204; The connecting ring 201 is fixedly connected to the surface of the core 1, the mounting ring 204 is coaxially disposed on the outside of the connecting ring 201, and the buffer bladder 202 is evenly disposed between the mounting ring 204 and the connecting ring 201.

[0029] It should be noted that the tensile-resistant and flexural-resistant power cable of the present invention can provide a small displacement for the conductor 1 when bending through the wrapping structure 2, so as to avoid the bending from affecting the conductor 1 and to avoid the short circuit and overheating of the conductor 1 during use. The auxiliary component 3 provides good support for it and further improves its tensile and flexural performance.

[0030] In one possible implementation, the surface of the buffer bladder 202 is fixedly connected with uniformly distributed support blocks 203, and the buffer bladder 202 is fixedly connected to the connecting ring 201 and the mounting ring 204 through the support blocks 203.

[0031] Specifically, when bending occurs, the buffer bladder 202 can compress the buffer bladder 202 through the connecting ring 201, causing it to deform and provide displacement space for the wire core 1, thereby preventing the wire core 1 from bending directly and affecting its use.

[0032] In one possible implementation, the interior of the buffer bladder 202 is filled with carbon dioxide gas.

[0033] Specifically, if the core 1 overheats and spontaneously combusts, it can burn the buffer bladder 202, causing the buffer bladder 202 to rupture. This allows carbon dioxide gas to fill between the mounting ring 204 and the connecting ring 201, reducing the contact between oxygen and the combustion site, thus reducing the oxygen content and delaying the spread of the fire.

[0034] Regarding the use of carbon dioxide gas, under normal conditions, the main purpose of using carbon dioxide for fire extinguishing is to reduce the oxygen concentration to extinguish the fire. Carbon dioxide is usually stored in a high-pressure liquid state. The reason for using it in this cable in gaseous form within the buffer bladder 202 is to ensure the flexible buffering of the buffer bladder 202, providing space for the conductor 1 to make slight displacement. In the sealed space formed by the mounting ring 204 and the connecting ring 201, when the conductor 1 overheats and burns through the bladder wall, the gas can be released and diffused directly without phase change. The fire extinguishing response is faster and more direct, which is crucial for suppressing the initial fire. Its fire extinguishing method is sufficient to deal with the initial fire hazard caused by the overheating of the conductor 1.

[0035] In one possible implementation, the auxiliary component 3 includes a retaining ring 301, a housing 304, a slip ring 302, and a spring 303; The wrapping structure 2 is coaxially disposed on the inner side of the outer shell 304, and the two fixing rings 301 are respectively fixedly connected to both ends of the outer shell 304; The two housings 304 are connected by adjacent fixing rings 301. The slip ring 302 is fixedly connected to one end of one of the fixing rings 301, and the slip ring 302 extends through the inner wall of the adjacent fixing ring 301 and is slidably connected to the inner wall of the fixing ring 301. One end of the spring 303 is fixedly connected to the surface of the slip ring 302, and the other end of the spring 303 is fixedly connected to the inner wall of the fixing ring 301 that is not fixedly connected to the slip ring 302.

[0036] Specifically, the outer shell 304 is used to protect the inner enclosure structure 2, preventing direct collision with the enclosure structure 2 in the event of impact or other situations, thus affecting its performance. At the same time, the arrangement of the fixing ring 301, the slip ring 302 and the spring 303 allows two adjacent fixing rings 301 to separate from each other during the pulling process. During this process, the slip ring 302 can block the gap between them, while compressing the spring 303. This arrangement can divide the tensile force into multiple segments to reduce its impact and improve the tensile performance. The outer shell 304 is made of cross-linked polyethylene insulation material. In one possible implementation, the auxiliary component 3 further includes a plurality of support plates 309 and elastic strips 311; Several support plates 309 are arranged in a ring on the inner side of the outer shell 304. One end of the support plate 309 is fixedly connected to the inner wall of the outer shell 304, and the other end of the support plate 309 is fixedly connected to the surface of the mounting ring 204. The elastic strips 311 are fixedly connected to the inside of the support plate 309 and are evenly distributed.

[0037] Specifically, the support plate 309 is provided to enhance the structural support strength, while the elastic strip 311 is provided to improve its tensile and flexural strength.

[0038] In one possible implementation, the support plate 309 has staggered grooves 310 on both sides.

[0039] The auxiliary component 3 also includes several heat-conducting plates 305 and pull plates 306; Several heat-conducting plates 305 are disposed inside the housing 304 and are staggered with the support plate 309. One end of each heat-conducting plate 305 passes through the mounting ring 204 and the connecting ring 201 in sequence and is inserted into the inside of the wire core 1. The pull plate 306 is fixedly connected to the heat-conducting plate 305 located inside the wire core 1 and is arranged in an arc shape.

[0040] Specifically, the arc-shaped design of the pull plate 306 can strengthen the connection with the wire core 1 and prevent the heat-conducting plate 305 from separating from the wire core 1. Furthermore, the pull plate 306 is connected to the filler of the wire core 1. The wire core 1 is composed of a conductor, an insulation layer, a filler layer, etc., forming a battery cell. This structure is a relatively mature component in existing technology applications, and will not be elaborated on further here.

[0041] In one possible implementation, the surface of the outer shell 304 is provided with annularly distributed connecting grooves 308, and one end of the heat-conducting plate 305 away from the pull plate 306 extends into the interior of the connecting grooves 308. The surface of the heat-conducting plate 305 away from the pull plate 306 is fixedly connected with uniformly distributed heat dissipation fins 307 located inside the connecting grooves 308.

[0042] The heat-conducting plate 305, the pull plate 306, and the heat dissipation fins 307 are all made of thermally conductive silicone rubber material.

[0043] Specifically, the arrangement of the heat-conducting plate 306, heat dissipation fins 307, and heat-conducting plate 305 made of thermally conductive silicone rubber material can absorb heat during the use of the cable and dissipate it to the outside through the heat dissipation fins 307, thus preventing spontaneous combustion caused by heat accumulation in the wire core 1. Furthermore, the thermally conductive silicone rubber material has good deformation and support effects, ensuring good heat dissipation without affecting the tensile and flexural properties of the auxiliary component 3 and the wrapping structure 2.

[0044] In one possible implementation, the elastic strip 311 is made of shape memory alloy material, and the support plate 309 is made of aramid fiber material.

[0045] Specifically, the support plate 309 made of aramid fiber material can provide good support, while the groove 310 can provide good deformation space during bending, and the elastic strip 311 made of shape memory alloy material can restore it after deformation.

[0046] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: In this invention, through the cooperation of the wrapping structure 2 and the auxiliary components 3, the structure of the buffer bladder 202 filled with carbon dioxide, the spring 303 and the slip ring 302 are used to achieve graded buffering and distributed tensile strength, which greatly improves the flexural strength and tensile strength. Furthermore, by filling the buffer bladder 202 with carbon dioxide, it can release gas to suppress the fire when overheated, providing built-in fire safety. At the same time, the use of thermally conductive silicone rubber to form a heat-conducting plate 305, a pull plate 306 and heat dissipation fins 307 creates an efficient heat dissipation path from the inside of the wire core 1 to the outer surface, effectively preventing heat accumulation.

[0047] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0048] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tensile-resistant and flexural-resistant power cable, characterized in that, include: Core wire, wrapping structure, and auxiliary components; The wrapping structure is disposed on the surface of the wire core, and the auxiliary component is disposed on the surface of the wrapping structure; The encapsulation structure includes a connecting ring, a buffer bladder, and a mounting ring; The connecting ring is fixedly connected to the surface of the wire core, the mounting ring is coaxially disposed on the outside of the connecting ring, and the buffer bladder is evenly disposed between the mounting ring and the connecting ring. The auxiliary components include several support plates and elastic strips; Several support plates are arranged in a ring on the inner side of the outer shell. One end of each support plate is fixedly connected to the inner wall of the outer shell, and the other end of each support plate is fixedly connected to the surface of the mounting ring. The elastic strips are fixedly connected to the inside of the support plates and are evenly distributed. The auxiliary components also include a retaining ring, a housing, a slip ring, and a spring; The outer shell is coaxially disposed on the outside of the wire core, the wrapping structure is coaxially disposed on the inside of the outer shell, and the two fixing rings are respectively fixedly connected to both ends of the outer shell; The two outer shells are joined together by adjacent fixed rings. A slip ring is fixedly connected to one end of one of the fixed rings and extends through the inner wall of the adjacent fixed ring, slidingly connected to the inner wall of the fixed ring. One end of the spring is fixedly connected to the surface of the slip ring, and the other end of the spring is fixedly connected to the inner wall of the fixed ring that is not fixedly connected to the slip ring. The arrangement of the fixed rings, slip ring, and spring allows the two adjacent fixed rings to separate during the pulling process. During this process, the slip ring can block the gap between them and compress the spring.

2. The tensile-resistant and flexural-resistant power cable according to claim 1, characterized in that, The surface of the buffer bladder is fixedly connected with evenly distributed support blocks, and the buffer bladder is fixedly connected to the connecting ring and the mounting ring through the support blocks.

3. The tensile-resistant and flexural-resistant power cable according to claim 2, characterized in that, The buffer bladder is filled with carbon dioxide gas.

4. The tensile-resistant and flexural-resistant power cable according to claim 1, characterized in that, The support plate has staggered grooves on both sides.

5. The tensile-resistant and flexural-resistant power cable according to claim 4, characterized in that, The auxiliary components also include several heat-conducting plates and pull plates; Several heat-conducting plates are disposed inside the outer shell and are staggered with the support plate. One end of each heat-conducting plate passes through the mounting ring and the connecting ring in sequence and is inserted into the inside of the wire core. The pull plate is fixedly connected to the heat-conducting plate located inside the wire core and is arranged in an arc shape.

6. The tensile-resistant and flexural-resistant power cable according to claim 5, characterized in that, The surface of the outer shell is provided with annularly distributed connecting grooves. The end of the heat-conducting plate away from the pull plate extends into the interior of the connecting groove. The surface of the end of the heat-conducting plate away from the pull plate is fixedly connected with uniformly distributed heat dissipation fins located inside the connecting groove.

7. The tensile-resistant and flexural-resistant power cable according to claim 6, characterized in that, The heat-conducting plate, pull plate, and heat dissipation fins are all made of thermally conductive silicone rubber material.

8. The tensile-resistant and flexural-resistant power cable according to claim 1, characterized in that, The elastic strip is made of shape memory alloy, and the support plate is made of aramid fiber.

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