Cable capable of avoiding skin effect

Abstract

The invention discloses a cable capable of avoiding a skin effect, and relates to the technical field of cables, the cable comprises a fixed rod, the outer side of the fixed rod is provided with partition plates, the outer side of the fixed rod is provided with a wire core, one side between the partition plates is provided with an insulation mechanism for reducing the skin effect, the insulation mechanism comprises a silver plating layer, and the silver plating layer is arranged between the partition plates. The silver plating layer is arranged on the outer side of the wire core, an inner insulating layer is arranged on one side between the partition plates, and the inner insulating layer is arranged on the outer side of the wire core in a sleeving mode. According to the cable capable of avoiding the skin effect, the silver-plated layer is arranged on the outer side of the wire core, the surface of the silver-plated wire core can reduce resistance and improve the current transmission efficiency, a plurality of strands of mutually insulated wire cores are woven into a bundle to replace a thick wire with the same sectional area, and the sectional area of a conductor can be more effectively utilized through the method; each strand of wire core can transmit current independently, so that the influence of skin effect is reduced to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a cable for avoiding skin effect. Background Art

[0002] Cable is a wire product used to transmit electrical energy information and realize electromagnetic energy conversion. It has the characteristics of internal power supply and external insulation. Cable is usually composed of conductor, insulation layer, inner sheath, outer sheath and other parts. The conductor is the core part of the cable and is responsible for transmitting current.

[0003] When in use, the current density distribution of the cable is uneven when transmitting current, which causes the current transmission capacity of the core to decrease as the cross-sectional area of ​​the core increases, thereby reducing the efficiency of current transmission.

[0004] In order to overcome the above defects, the prior art (a Chinese patent with announcement number CN104485168B and publication date 2017-01-18) is a low skin effect large-diameter cable, which is composed of a cable core and an insulating layer. The insulating layer is coated on the outer surface of the cable core, and an elastic buffer layer is arranged in between. The outer surface of the cable core is evenly distributed with "T"-shaped heat dissipation grooves, and a reinforcement hole with a circular cross-section is arranged at the center of the inner part, and at least two layers of load reduction holes are distributed in a ring shape with the center of the reinforcement hole as the center. Insulating ceramic powder is also arranged in the load reduction hole, and an elastic tensile strip is arranged in the reinforcement hole. The thickness between the reinforcement hole and the load reduction hole, between the load reduction hole and the load reduction hole, between the load reduction hole and the cable core surface and the "T"-shaped heat dissipation groove wall are all consistent, and at least two load reduction holes are evenly distributed in the insulating layer. It has the characteristics of light weight, good heat resistance and heat dissipation performance, strong tensile resistance, low sag, low thermal expansion coefficient, significantly reduced skin effect, and strong overcurrent carrying capacity, which effectively reduces the skin effect that is prone to occur in large-section power cable cores and improves the carrying capacity and operating efficiency of power cables;

[0005] In order to overcome the above defects, the prior art (a Chinese patent with announcement number CN204991189U and publication date 2016-01-20) is a low skin effect power cable with an adhered conductor oxide film, which belongs to the field of cables and includes a plurality of copper wire strands, the strands of copper wires are divided into fan-shaped strands by corrugated insulating paper, an oxide film is provided on the surface of the copper wires, the strands of copper wires are covered with a semi-conductive tape, and the semi-conductive tape is provided with a semi-conductive inner shield, an insulating layer, a semi-conductive outer shield, a semi-conductive buffer water-blocking tape, an aluminum sheath, an asphalt anti-corrosion layer, and an outer sheath from the inside to the outside. The oxide film on the surface of the copper wires can insulate the copper wires from each other, thereby effectively reducing the skin effect and reducing energy loss.

[0006] In order to overcome the above defects, the prior art (the announcement number is CN202495281U, and the publication date is 2012-10-17 Chinese patent) is a low skin effect ultra-high voltage cross-linked cable, which includes a tubular conductor, wherein the tubular conductor is formed by drawing a copper tube to form a conductor structure with a required cross-sectional specification; an insulating layer made of cross-linked polyethylene material is extruded on the tubular conductor, a metal sheath is arranged outside the insulating layer, and an outer sheath is arranged outside the metal sheath, and an insulating material made of magnesium oxide is filled in the middle of the tubular conductor. The conductor structure can meet the mechanical strength requirements, meet the temperature resistance level of the cable, and reduce the skin effect of the cable.

[0007] The above mechanism reduces the skin effect of the cable by improving the overcurrent carrying capacity and insulation performance of the wire core. However, in actual use, the outer surface of the cable will be worn due to long-term contact with the outside world, thereby shortening the service life of the cable. Summary of the invention

[0008] The object of the present invention is to provide a cable that avoids the skin effect, so as to solve the problem proposed in the above background technology that the current density distribution of the cable is uneven during the current transmission process, which leads to the decrease of the current transmission efficiency of the core as the cross-sectional area of ​​the core increases.

[0009] To achieve the above object, the present invention provides the following technical solution: a cable for avoiding skin effect, comprising a fixing rod, wherein a partition plate is arranged on the outer side of the fixing rod;

[0010] A wire core is arranged on the outside of the fixing rod, an insulating mechanism for reducing the skin effect is arranged on one side between the partition plates, the insulating mechanism includes a silver-plated layer, and the silver-plated layer is arranged on the outside of the wire core, an inner insulating layer is arranged on one side between the partition plates, and the inner insulating layer is sleeved on the outside of the wire core, and the current can be transmitted by utilizing the wire core inside the cable. In order to ensure that the current can be distributed more evenly during transmission and reduce the skin effect, a silver-plated layer is arranged on the outside of the wire core, and the surface of the wire core after silver plating can reduce resistance and improve the current transmission efficiency, thereby alleviating the influence of the skin effect to a certain extent, and using multiple strands of mutually insulated wire cores to weave into bundles to replace thick wires of the same cross-sectional area. This method can more effectively utilize the conductor cross-sectional area and reduce the influence of the skin effect, because each wire core can transmit current relatively independently, making the current distribution more uniform, and the wire cores can be separated by the mutual cooperation between the partition plate and the inner insulating layer, avoiding the temperature from being unable to dissipate due to the distance between the wire cores being too close, thereby enabling the cable as a whole to stably dissipate heat when in use and avoiding heat accumulation;

[0011] The outer side of the partition plate is sleeved with an inner protective layer, and the outer side of the inner protective layer is provided with a protective mechanism for reducing the wear of the outer surface of the cable.

[0012] Furthermore, a grounding layer is wrapped around the outside of the inner protective layer, and an outer insulating layer is provided on the outside of the grounding layer. The grounding layer is wrapped around the outside of the inner protective layer to guide the leakage current to the ground, thereby avoiding threats to personal safety and reducing the radiation power of the cable and the electromagnetic radiation hazard to humans.

[0013] Furthermore, the distance between the inner sides of the grounding layer is greater than the outer diameter of the inner protective layer, and the outer side of the grounding layer is in contact with the inner side of the outer insulating layer.

[0014] Furthermore, the protective mechanism includes a tensile layer, and the tensile layer is sleeved on the outside of the outer insulating layer, a limiting protrusion is arranged on the outside of the tensile layer, and a support block is sleeved on the outside of the limiting protrusion, and a limiting groove matching the limiting protrusion is opened on the inside of the support block. The wear-resistant layer and the support block can be disassembled and replaced through the mutual cooperation between the limiting protrusion and the limiting groove. Similarly, a support block of appropriate length and the wear-resistant layer on its outside are selected, and the outer surface of the cable is replaced again by using the snap-fit ​​connection between the limiting groove and the limiting protrusion, thereby avoiding replacement of the entire cable and reducing waste of resources.

[0015] Furthermore, the cross-section of the limiting protrusion is "T"-shaped, and the length of the limiting protrusion is equal to the length of the tensile layer. The outer surface of the cable is replaced by utilizing the snap connection between the limiting groove and the limiting protrusion, thereby avoiding replacement of the entire cable and reducing waste of resources.

[0016] Furthermore, a buffer mechanism is provided on the outer side of the support block, and the buffer mechanism includes a fixing groove, and the fixing groove is opened on the outer surface of the support block, and a wear-resistant layer is provided inside the fixing groove through a buffer spring. The support block can support the inner side of the wear-resistant layer to prevent the wear-resistant layer from deforming and being unable to quickly reset after being subjected to force. At the same time, the support of the support block can also prevent the wear-resistant layer from exerting a large pressure on the buffer spring, so that the elasticity of the buffer spring can always be maintained and the impact force can be buffered.

[0017] Furthermore, the outer side of the support block fits with the inner side of the wear-resistant layer, and fixing grooves are arranged at equal intervals on the outer side of the support block. The support block can support the inside of the wear-resistant layer to avoid the wear-resistant layer being unable to reset after being deformed due to impact.

[0018] Furthermore, wear-resistant bumps are arranged on the outside of the wear-resistant layer, and the wear-resistant bumps are distributed at equal angles on the outside of the wear-resistant layer. The wear-resistant bumps are arranged on the outside of the wear-resistant layer to reduce the surface wear of the wear-resistant layer, thereby extending the service life of the wear-resistant layer.

[0019] Furthermore, the top end of the buffer spring is connected to the inner side of the wear-resistant layer, and an elastic structure is formed between the fixed groove and the wear-resistant layer through the buffer spring. When the cable is impacted, the wear-resistant layer and the buffer spring arranged inside the fixed groove can play a role of buffering protection. The buffering force of the buffer spring on the impact force and the elasticity of the wear-resistant layer itself can reduce the impact of the impact force on the internal wire core. The elastic force of the buffer spring itself can support the gap between the wear-resistant layer and the fixed groove to prevent the wear-resistant layer from being concave due to wear after long-term use. At the same time, the fixed groove can prevent the impact force from being directly transmitted to the wire core when the cable is subjected to impact force, so that the cable has a certain gap for force buffering when it is subjected to impact force, thereby making the overall buffering and impact resistance performance more stable.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting a silver-plated layer on the outside of the wire core, the surface of the silver-plated wire core can reduce resistance and improve current transmission efficiency. Using multiple strands of mutually insulated wire cores to weave into bundles to replace thick wires of the same cross-sectional area can more effectively utilize the conductor cross-sectional area, because each strand of wire core can transmit current relatively independently, thereby reducing the impact of the skin effect to a certain extent;

[0022] Furthermore, the separation plate and the inner insulating layer can separate the wire cores through cooperation with each other, so as to avoid the wire cores being too close to each other and causing the temperature to be unable to dissipate, thereby enabling the cable as a whole to dissipate heat stably during use and avoid heat accumulation;

[0023] Furthermore, by wrapping the grounding layer around the outside of the inner protective layer, the leakage current is directed to the ground, avoiding threats to personal safety and reducing the radiation power of the cable and the electromagnetic radiation hazards to people;

[0024] 2. The worn wear-resistant layer is cut off and separated from the cable, and the wear-resistant layer and the support block are disassembled and replaced by the cooperation between the limiting protrusion and the limiting groove, and the outer surface of the cable is replaced by the engagement connection between the limiting groove and the limiting protrusion, thereby avoiding the replacement of the entire cable and reducing the waste of resources;

[0025] Furthermore, when the cable is impacted, the wear-resistant layer and the buffer spring arranged inside the fixed groove can play a role of buffering protection. The buffering force of the buffer spring on the impact force and the elasticity of the wear-resistant layer itself can reduce the impact of the impact force on the internal wire core. The elastic force of the buffer spring itself can support the gap between the wear-resistant layer and the fixed groove to prevent the wear-resistant layer from being concave due to wear after long-term use. At the same time, the fixed groove can prevent the impact force from being directly transmitted to the wire core when the cable is subjected to impact force, so that the cable has a certain gap for force buffering when it is subjected to impact force, thereby making the overall buffering and impact resistance performance more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view structural schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the side cross-sectional structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the explosion structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the side cross-sectional structure of the protection mechanism of the present invention;

[0030] Figure 5 It is a partial structural schematic diagram of the protection mechanism of the present invention;

[0031] Figure 6 It is a schematic diagram of the connection structure of the limiting protrusion and the limiting groove of the present invention;

[0032] Figure 7 It is a schematic diagram of the connection structure between the ground layer and the inner protective layer of the present invention;

[0033] Figure 8 It is a structural schematic diagram of the insulation mechanism of the present invention.

[0034] In the figure: 1. fixing rod; 2. partition plate; 3. inner insulation layer; 4. wire core; 5. silver-plated layer; 6. inner protective layer; 7. grounding layer; 8. outer insulation layer; 9. tensile layer; 10. limiting protrusion; 11. limiting groove; 12. support block; 13. buffer spring; 14. fixing groove; 15. wear-resistant layer; 16. wear-resistant protrusion. DETAILED DESCRIPTION

[0035] The following will be combined with the 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 described embodiments 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 The technical solution shown is to solve the problem that the current density distribution is uneven during the current transmission process of the cable, which leads to the decrease of the conductor's current transmission capacity as the conductor cross-sectional area increases, thereby leading to the decrease of the current transmission efficiency: the cable for avoiding the skin effect discloses an insulating mechanism, including a fixed rod 1, a partition plate 2 is arranged on the outer side of the fixed rod 1, a wire core 4 is arranged on the outer side of the fixed rod 1, an insulating mechanism for reducing the skin effect is arranged on one side between the partition plates 2, the insulating mechanism includes a silver-plated layer 5, and the silver-plated layer 5 is arranged on the outer side of the wire core 4, an inner insulating layer 3 is arranged on the one side between the partition plates 2, and the inner insulating layer 3 is sleeved on the outer side of the wire core 4, a grounding layer 7 is wound around the outer side of the inner protective layer 6, and an outer insulating layer 8 is arranged on the outer side of the grounding layer 7, the distance between the inner sides of the grounding layer 7 is greater than the outer diameter of the inner protective layer 6, and the outer side of the grounding layer 7 is in contact with the inner side of the outer insulating layer 8.

[0038] In this example, the current can be transmitted by utilizing the wire core 4 inside the cable. In order to ensure that the current can be distributed more evenly during transmission and reduce the skin effect, a silver-plated layer 5 is provided on the outer side of the wire core 4. The surface of the wire core 4 after silver plating can reduce resistance and improve current transmission efficiency, thereby alleviating the influence of the skin effect to a certain extent.

[0039] At the same time, multiple mutually insulated wire cores 4 are braided into bundles to replace thick wires of the same cross-sectional area. This method can more effectively utilize the conductor cross-sectional area and reduce the influence of the skin effect, because each wire core 4 can transmit current relatively independently, making the current distribution more uniform;

[0040] The separation plate 2 and the inner insulating layer 3 cooperate with each other to separate the wire cores 4, so as to avoid the wire cores 4 being too close to each other and causing the temperature to be unable to dissipate, thereby enabling the cable as a whole to dissipate heat stably during use and avoid heat accumulation;

[0041] The grounding layer 7 is wound around the outer side of the inner protective layer 6 to guide the leakage current to the ground, thereby preventing the threat to personal safety and reducing the radiation power of the cable and the electromagnetic radiation hazard to humans.

[0042] Embodiment 2:

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6The technical solution shown is to solve the problem that the cable is prone to wear during use, resulting in a shortened service life: the cable that avoids the skin effect discloses a protective mechanism, the outer side of the partition plate 2 is provided with an inner protective layer 6, and the outer side of the inner protective layer 6 is provided with a protective mechanism for reducing the wear of the outer surface of the cable, the protective mechanism includes a tensile layer 9, and the tensile layer 9 is provided on the outer side of the outer insulating layer 8, a limiting protrusion 10 is provided on the outer side of the tensile layer 9, and the outer side of the limiting protrusion 10 is provided with a supporting block 12, and the inner side of the supporting block 12 is provided with a limiting groove 11 matching the limiting protrusion 10, the cross-section of the limiting protrusion 10 is "T" shaped, and the length of the limiting protrusion 10 is equal to the length of the tensile layer 9, the outer side of the wear-resistant layer 15 is provided with a wear-resistant protrusion 16, and the wear-resistant protrusions 16 are distributed at equal angles on the outer side of the wear-resistant layer 15.

[0044] In this example, the outer surface wear-resistant layer 15 of the cable is in contact with the outside for a long time, which causes the surface of the wear-resistant layer 15 to be worn. By providing the wear-resistant protrusion 16 on the outer side of the wear-resistant layer 15, the wear on the surface of the wear-resistant layer 15 can be reduced, thereby extending the service life of the wear-resistant layer 15.

[0045] When the wear-resistant layer 15 is worn to the point where it can no longer protect the internal cable, the worn wear-resistant layer 15 is cut off and separated from the cable, and the wear-resistant layer 15 and the support block 12 are disassembled and replaced through the cooperation between the limiting protrusion 10 and the limiting groove 11. Similarly, a support block 12 of appropriate length and the wear-resistant layer 15 on its outside are selected, and the outer surface of the cable is replaced again by utilizing the snap connection between the limiting groove 11 and the limiting protrusion 10, thereby avoiding the replacement of the entire cable and reducing waste of resources.

[0046] Embodiment three:

[0047] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The technical solution shown is to solve the problem that the internal core 4 of the cable is broken and damaged due to impact when the cable is in use: the cable that avoids the skin effect discloses a buffer mechanism, and a buffer mechanism is arranged on the outside of the support block 12, and the buffer mechanism includes a fixing groove 14, and the fixing groove 14 is opened on the outer surface of the support block 12, and the inside of the fixing groove 14 is provided with a wear-resistant layer 15 through a buffer spring 13, the outer side of the support block 12 is in contact with the inner side of the wear-resistant layer 15, and the fixing grooves 14 are opened on the outer side of the support block 12 at equal intervals, the top of the buffer spring 13 is connected to the inner side of the wear-resistant layer 15, and an elastic structure is formed between the fixing groove 14 and the wear-resistant layer 15 through the buffer spring 13.

[0048] In this example, when the cable is impacted, the wear-resistant layer 15 and the buffer spring 13 provided inside the fixing groove 14 can play a role of buffering protection. The buffering force of the buffer spring 13 on the impact force and the elasticity of the wear-resistant layer 15 itself can reduce the impact of the impact force on the internal wire core 4.

[0049] The support block 12 can support the inner side of the wear-resistant layer 15 to prevent the wear-resistant layer 15 from deforming and being unable to quickly return to its original position after being subjected to force. At the same time, the support of the support block 12 can also prevent the wear-resistant layer 15 from exerting a large pressure on the buffer spring 13, so that the elasticity of the buffer spring 13 can always be maintained and the impact force can be buffered;

[0050] The elastic force of the buffer spring 13 itself can support the gap between the wear-resistant layer 15 and the fixed groove 14, thereby preventing the wear-resistant layer 15 from being dented due to wear after long-term use. At the same time, the fixed groove 14 can prevent the impact force from being directly transmitted to the core 4 when the cable is subjected to impact force, so that the cable has a certain gap for force buffering when subjected to impact force, thereby making the overall buffering and impact resistance performance more stable.

[0051] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A cable for avoiding skin effect, comprising a fixing rod (1), wherein a partition plate (2) is arranged on the outer side of the fixing rod (1); Features: A wire core (4) is arranged on the outer side of the fixing rod (1); an insulating mechanism for reducing skin effect is arranged on one side between the partition plates (2); the insulating mechanism comprises a silver-plated layer (5), and the silver-plated layer (5) is arranged on the outer side of the wire core (4); an inner insulating layer (3) is arranged on one side between the partition plates (2), and the inner insulating layer (3) is sleeved on the outer side of the wire core (4); The outer side of the partition plate (2) is provided with an inner protective layer (6), and the outer side of the inner protective layer (6) is provided with a protective mechanism for reducing the wear of the outer surface of the cable.

2. A cable for avoiding skin effect according to claim 1, characterized in that: A grounding layer (7) is wound around the outer side of the inner protective layer (6), and an outer insulating layer (8) is arranged on the outer side of the grounding layer (7).

3. A cable for avoiding skin effect according to claim 2, characterized in that: The distance between the inner sides of the grounding layer (7) is greater than the outer diameter of the inner protective layer (6), and the outer side of the grounding layer (7) is in contact with the inner side of the outer insulating layer (8).

4. A cable for avoiding skin effect according to claim 2, characterized in that: The protective mechanism comprises a tensile layer (9), and the tensile layer (9) is sleeved on the outside of the outer insulating layer (8), a limiting protrusion (10) is arranged on the outside of the tensile layer (9), and a supporting block (12) is sleeved on the outside of the limiting protrusion (10), and a limiting groove (11) matching the limiting protrusion (10) is opened on the inside of the supporting block (12).

5. A cable for avoiding skin effect according to claim 4, characterized in that: The cross section of the limiting protrusion (10) is in a "T" shape, and the length of the limiting protrusion (10) is equal to the length of the tensile layer (9).

6. A cable for avoiding skin effect according to claim 4, characterized in that: A buffer mechanism is arranged on the outside of the support block (12), the buffer mechanism comprising a fixing groove (14), the fixing groove (14) being opened on the outer surface of the support block (12), and a wear-resistant layer (15) is arranged inside the fixing groove (14) via a buffer spring (13).

7. A cable for avoiding skin effect according to claim 6, characterized in that: The outer side of the support block (12) is in contact with the inner side of the wear-resistant layer (15), and the fixing grooves (14) are arranged at equal intervals on the outer side of the support block (12).

8. A cable for avoiding skin effect according to claim 7, characterized in that: Wear-resistant bumps (16) are arranged on the outer side of the wear-resistant layer (15), and the wear-resistant bumps (16) are distributed at equal angles on the outer side of the wear-resistant layer (15).

9. A cable for avoiding skin effect according to claim 8, characterized in that: The top end of the buffer spring (13) is connected to the inner side of the wear-resistant layer (15), and an elastic structure is formed between the fixing groove (14) and the wear-resistant layer (15) via the buffer spring (13).

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