A safe and environmentally friendly power cable with rapid heat dissipation
By using the thermal layer group and heat sink group in environmentally friendly cables combined with the wire mesh design, the problem of insufficient heat dissipation of the cable is solved, and the rapid heat dissipation and safety performance of the cable core are improved.
Patent Information
- Application Number
- CN202010699752.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-07-20
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2040-07-20
AI Technical Summary
Due to the poor heat dissipation effect of existing environmentally friendly cables due to laminated seals, the heat accumulation of cable core may lead to aging of the insulation layer and fire of the cable breakdown.
Using a heat dissipation layer group including a first thermal conductive layer and a second thermal conductive layer arranged at intervals, the heat dissipation area and channels are increased through the first heat dissipation fin and the second heat dissipation fin, the heat conduction and dissipation path are increased, and the heat is accelerated by using the wire mesh. Conduct and optimize thermal conductivity through slots and through holes.
It effectively reduces the possibility of excessive temperature of the cable core, improves the safety performance and heat dissipation efficiency of the cable, and reduces the risk of cable fire.
Smart Images
Figure CN111933346B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of cables, and in particular to a safe and environmentally friendly electric power cable with fast heat dissipation. Background Art
[0002] With the development of the world economy and technology, the demand for wires and cables is growing, and the requirements for their performance are increasing. Under the new economic situation and technical conditions, the development of the global wire and cable industry presents a new trend, and environmentally friendly cables have gradually become the focus of global cable development. Environmentally friendly cables refer to cables that do not contain heavy metals such as lead, cadmium, hexavalent chromium, mercury, and bromine-based flame retardants. They are tested for environmental performance by SGS, a recognized testing agency, and meet the EU Environmental Directive (RoSH) and exceed its index requirements. Wires and cables that do not produce harmful halogen gases, do not produce corrosive gases, generate less heat when burned, and do not pollute the soil.
[0003] A Chinese patent with announcement number CN209657870U discloses a safe and environmentally friendly electric power cable with fast heat dissipation, including a cable core, a cable clamp is sleeved on the outer surface of the cable core, a waterproof PE sheath is sleeved on the outer surface of the cable clamp, an armored steel wire is sleeved on the outer surface of the waterproof PE sheath, an anti-corrosion asphalt layer is sleeved on the outer surface of the armored steel wire, a high-temperature resistant glass fiber braided layer is sleeved on the outer surface of the anti-corrosion asphalt layer, a silicone jacket is sleeved on the outer surface of the high-temperature resistant glass fiber braided layer, and a wire threading hole is provided through one end of the cable clamp.
[0004] The above existing environmentally friendly cables have the following technical defects: when the cable is in operation, the cable core will heat up. Since multiple sealing layers are stacked and wrapped on the outside of the cable core, the heat dissipation effect of these sealing layers is poor, which will prevent the heat of the cable core from being dissipated to the outside of the cable in time, causing the heat of the cable core to accumulate in the cable. When the cable is overloaded for a long time, more and more heat accumulates in the cable core inside the cable, and the temperature of the cable core will become higher and higher. If the temperature of the cable core exceeds the maximum allowable temperature of normal heating, the insulation layer of the cable will age and dry out, and the aging and drying of the insulation layer will reduce the insulation performance of the insulation layer, and the cable is prone to breakdown and fire, which will make the cable harmful to people nearby. Summary of the invention
[0005] Purpose of the invention: In view of the problems existing in the prior art, the present invention provides a safe and environmentally friendly electric power cable with rapid heat dissipation, which can dissipate heat from the cable core in a timely manner, reduce the possibility of fire in the cable core due to excessive temperature of the cable core, and improve the safety performance of the cable core.
[0006] Technical solution: The present invention provides a safe and environmentally friendly power cable with rapid heat dissipation, comprising a plurality of cable cores and a shielding layer wrapped together on the outside of the plurality of cable cores, a heat dissipation layer group is arranged on the side of the shielding layer away from the cable core, and an insulating layer and a protective cover are sequentially stacked and wrapped from the inside to the outside on the side of the heat dissipation layer group away from the shielding layer;
[0007] The heat dissipation layer group includes a first heat-conducting layer and a second heat-conducting layer which are arranged at intervals, the first heat-conducting layer is wrapped on the side of the shielding layer away from the cable core, the second heat-conducting layer is in contact with the side of the insulating layer away from the protective cover, a plurality of first heat-dissipating fins are arranged between the first heat-conducting layer and the second heat-conducting layer, the first heat-dissipating fins are distributed radially along the cable core, and the two ends of the first heat-dissipating fins are fixedly connected to the first heat-conducting layer and the second heat-conducting layer respectively.
[0008] Through the above technical solution, the first heat sink separates the first heat conducting layer from the second heat conducting layer, increasing the space for heat dissipation of the cable core in the cable, and reducing the possibility of excessive temperature of the cable core caused by heat accumulation in the cable core. The heat of the cable core is transferred to the first heat conducting layer through the shielding layer, and the first heat conducting layer transfers the heat to the first heat sink, which then transfers the heat to the second heat conducting layer; finally, the second heat conducting layer dissipates the heat into the air, allowing the cable core to dissipate heat in time, reducing the possibility of fire in the cable core caused by excessive temperature of the cable core, and improving the safety of the cable.
[0009] Furthermore, the shielding layer is formed by a plurality of metal wires circumferentially arranged along the outer side of the cable core, and the metal wires are staggered in the horizontal direction and the vertical direction.
[0010] Through the above technical solution, the shielding layer allows the heat of the cable core to be directly transferred to the first heat-conducting layer along the grid gaps between the metal wires, thereby accelerating the heat dissipation efficiency of the cable core.
[0011] Furthermore, a plurality of first card slots are provided on a side of the first heat-conducting layer away from the cable core, and a plurality of second card slots are provided on a side of the second heat-conducting layer away from the insulating layer. The positions of the first card slots correspond one to one with the positions of the second card slots, and the two ends of the first heat sink are respectively connected to the first card slots and the second card slots.
[0012] Through the above technical solution, the provision of the first card slot and the second card slot increases the contact area between the first heat conducting layer, the second heat conducting layer and the first heat sink, making the connection between the first heat sink and the first heat conducting layer and the second heat conducting layer more stable.
[0013] Furthermore, a plurality of the first heat sinks are evenly distributed along the periphery of the first heat conducting layer, and a gap is preset between two adjacent first heat sinks.
[0014] Through the above technical solution, the heat of the cable core can be evenly dissipated into the air in the gap, further improving the heat dissipation efficiency of the cable core.
[0015] Furthermore, the first heat-conducting layer is provided with a plurality of first through holes, and the second heat-conducting layer is provided with a plurality of second through holes.
[0016] Through the above technical scheme, the heat of the cable core is directly conducted to the insulating layer along the gaps in the shielding layer, the first through hole and the second through hole in turn, and then dissipated to the outside of the cable through the insulating layer, thereby reducing the possibility of the heat of the cable core being blocked inside the cable, shortening the time for the heat of the cable core to dissipate to the outside of the cable, and further improving the heat dissipation efficiency of the cable core.
[0017] Furthermore, a second heat sink is provided on the side of the cable core facing away from the shielding layer, the second heat sink is in contact with the cable core, the second heat sink is fixedly connected to the shielding layer on both sides facing the shielding layer, a heat dissipation channel is preset between two adjacent second heat sinks, and the heat dissipation channel is connected to the first through hole.
[0018] Through the above technical solution, the second heat sink is provided to separate adjacent cable cores, reducing the possibility of heat accumulation between the cable cores causing the cable core temperature to be too high; at the same time, the heat on the cable core is conducted to the second heat sink, and the second heat sink dissipates the heat into the heat dissipation channel. The heat is dissipated to the outside of the cable through the heat dissipation channel, the first through hole, and the second through hole in turn, so that the cable core can dissipate heat in time, thereby accelerating the heat dissipation efficiency of the cable core.
[0019] Furthermore, the second heat sink is configured to be arc-shaped, and a side of the second heat sink facing the cable core is configured to be an inner concave surface, and the inner concave surface of the second heat sink is in contact with the cable core.
[0020] Through the above technical solution, the contact area between the second heat sink and the cable core is increased, the heat conducted from the cable core to the second heat sink is increased, and the efficiency of the second heat sink in dissipating heat to the cable core is accelerated.
[0021] Furthermore, the insulating layer is an insulating layer made of mica tape, and the protective cover is a protective cover made of silicone.
[0022] Through the above technical scheme, mica tape is an insulating material with excellent high temperature resistance and high voltage resistance, which makes the cable resistant to high temperature and high pressure; silicone is soft and elastic, which reduces the possibility of fatigue fracture of the cable when bending, pulling, squeezing and rubbing, thereby playing a role in protecting the cable.
[0023] Beneficial effects:
[0024] 1. The present invention increases the heat dissipation area in the cable through the first heat dissipation layer group, and performs multiple heat conduction and heat dissipation on the cable core, so that the cable core dissipates heat in time, reduces the possibility of the cable core catching fire due to excessive cable core temperature, and improves the safety performance of the cable core.
[0025] 2. The second heat sink is provided to separate adjacent cable cores, reduce the possibility of heat accumulation between the cable cores, and dissipate heat from the cable cores in a timely manner, thereby accelerating the heat dissipation efficiency of the cable cores. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is an overall cross-sectional view of this embodiment.
[0027] Figure 2 It is a schematic diagram of the overall structure of this embodiment.
[0028] Figure 3 It is a schematic structural diagram for reflecting the first through hole and the second through hole of this embodiment.
[0029] Figure 4 yes Figure 2 Enlarged view of point A in the middle.
[0030] Among them: 1. cable core; 2. shielding layer; 21. metal wire; 3. heat dissipation layer group; 31. first heat conducting layer; 32. second heat conducting layer; 33. first heat sink; 34. first slot; 35. second slot; 36. gap; 37. first through hole; 38. second through hole; 4. insulation layer; 5. protective cover; 6. second heat sink; 61. heat dissipation channel. DETAILED DESCRIPTION
[0031] The present invention is further described in detail below in conjunction with the accompanying drawings.
[0032] Reference Figure 1 and Figure 2 The present invention discloses a safe and environmentally friendly power cable with rapid heat dissipation, comprising a plurality of cable cores 1. In the present embodiment, there are three cable cores 1 in total, and a shielding layer 2 wrapped around the outside of all the cable cores 1. The shielding layer 2 is formed by a plurality of metal wires 21 arranged circumferentially along the outside of all the cable cores 1, and the metal wires 21 are woven and connected in a staggered manner in the horizontal and vertical directions. When the cable core 1 heats up, the heat on the cable core 1 can pass through the grid gap formed by the metal wires 21 and directly conduct the heat outward, thereby reducing the possibility of the shielding layer 2 blocking the heat dissipation of the cable core 1 and accelerating the heat dissipation efficiency of the cable core 1.
[0033] Reference Figure 1, a second heat sink 6 is provided on the side of the cable core 1 away from the shielding layer 2, and the second heat sink 6 is fixedly connected to the shielding layer 2 on both sides facing the shielding layer 2, the second heat sink 6 is set to an arc shape, and the side of the second heat sink 6 facing the cable core 1 is set to an inner concave surface, and the inner concave surface of the second heat sink 6 fits the cable core 1. A heat dissipation channel 61 is preset between two adjacent second heat sinks 6. When the cable core 1 heats up, the heat on the cable core 1 is transferred to the second heat sink 6, and the second heat sink 6 dissipates the heat of the cable core 1 into the heat dissipation channel 61; finally, the heat of the cable core 1 is dissipated to the outside of the cable core 1 through the heat dissipation channel 61, so that the heat between the cable cores 1 is dissipated in time, the heat dissipation efficiency of the cable core 1 is accelerated, and the possibility of heat accumulation between the cable cores 1 causing the cable to catch fire is reduced. At the same time, the second heat sink 6 separates the heated cable cores 1 from each other, further reducing the possibility of heat accumulation between the cable cores 1 causing the cable to catch fire.
[0034] Reference Figure 2 and Figure 3 A heat dissipation layer group 3 is arranged on the side of the shielding layer 2 facing away from the cable core 1. The heat dissipation layer group 3 includes a first heat-conducting layer 31 and a second heat-conducting layer 32 arranged at intervals. The first heat-conducting layer 31 is wrapped on the side of the shielding layer 2 facing away from the cable core 1, and the second heat-conducting layer 32 is arranged on the side of the first heat-conducting layer 31 facing away from the shielding layer 2. A plurality of first through holes 37 are provided on the first heat-conducting layer 31, and a plurality of second through holes 38 are provided on the second heat-conducting layer 32. The positions of the first through holes 37 correspond to the positions of the second through holes 38 one by one, and the first through holes 37 are connected to the heat dissipation channel 61. When the cable core 1 dissipates heat, the heat of the cable core 1 is dissipated to the outside of the cable along the heat dissipation channel 61, the first through holes 37 and the second through holes 38, further accelerating the heat dissipation efficiency of the cable core 1 and reducing the possibility of heat accumulation between the cable cores 1 causing the cable to catch fire.
[0035] Reference Figure 3 A plurality of first heat sinks 33 are arranged between the first heat conducting layer 31 and the second heat conducting layer 32, and the two ends of the first heat sink 33 are respectively connected to the first heat conducting layer 31 and the second heat conducting layer 32. The first heat sink 33 is distributed radially along the cable core 1, and the plurality of first heat sinks 33 are evenly distributed along the periphery of the first heat conducting layer 31. A gap 36 is preset between two adjacent first heat sinks 33. The arrangement of the first heat sink 33 increases the amount of heat conducted from the cable core 1 to the first heat sink 33, and at the same time, the heat of the cable core 1 is evenly dissipated at the first heat sink 33, thereby accelerating the heat dissipation efficiency of the cable core 1.
[0036] Reference Figure 2 and Figure 4The first heat-conducting layer 31 and the second heat-conducting layer 32 are provided with a plurality of first slots 34 and a plurality of second slots 35 on the side opposite to each other, and the positions of the first slots 34 and the second slots 35 correspond to each other. The two ends of the first heat sink 33 are respectively connected to the first slots 34 and the second slots 35, and the first slots 34 and the second slots 35 increase the contact area between the first heat-conducting layer 31, the second heat-conducting layer 32 and the first heat sink 33, thereby enhancing the stability of the connection between the first heat-conducting layer 31, the second heat-conducting layer 32 and the first heat sink 33.
[0037] Reference Figure 3 The heat of the cable core 1 is evenly conducted to each first heat sink 33 via the first heat conducting layer 31. Each first heat sink 33 dissipates the heat of the cable core 1 to the surrounding gaps 36. The heat in the gaps 36 is dissipated to the outside of the cable through the second through holes 38, thereby accelerating the heat dissipation efficiency of the cable core 1, reducing the possibility of the cable catching fire due to excessive temperature of the cable core 1, and improving the safety performance of the cable.
[0038] Reference Figure 3 The second heat-conducting layer 32 is laminated with an insulating layer 4 and a protective sleeve 5 from the inside to the outside on the side facing away from the first heat-conducting layer 31. The second heat-conducting layer 32 is in contact with the side of the insulating layer 4 facing away from the protective sleeve 5. The insulating layer 4 is made of mica tape, and the protective sleeve 5 is made of silicone. Mica tape is an insulating material with excellent high temperature resistance and high pressure resistance, which makes the insulating layer 4 of the cable resistant to high temperature and high pressure. The protective sleeve 5 is a silicone sheath made of silicone, which has the advantages of being waterproof and resistant to high pressure, making the protective sleeve 5 of the cable resistant to high pressure. At the same time, the protective sleeve 5 uses the softness and elasticity of silicone to reduce the possibility of fatigue fracture of the cable when bending, pulling, squeezing, and rubbing.
[0039] The implementation principle of this embodiment is as follows: when the cable core 1 generates heat during operation, the heat of the cable core 1 is directly conducted to the first heat-conducting layer 31 along the grid gap formed by the metal wire 21. The heat of the cable core 1 is evenly conducted to each first heat sink 33 via the first heat-conducting layer 31, and each first heat sink 33 evenly dissipates the heat of the cable core 1 into the gap 36. The heat is dissipated to the outside of the cable through the second through hole 38 facing the gap 36, thereby accelerating the heat dissipation efficiency of the cable core 1. At the same time, adjacent cable cores 1 are separated by the second heat sink 6; the heat of the cable core 1 is directly conducted to the second heat sink 6 and dissipated into the heat dissipation channel 61, and the heat is dissipated to the outside of the cable along the heat dissipation channel 61, the first through hole 37, and the second through hole 38, thereby reducing the possibility of heat accumulation between the cable cores 1 causing the cable to catch fire, thereby improving the heat dissipation efficiency of the cable core 1.
[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A safe and environmentally friendly power cable with rapid heat dissipation. It is characterized in that The invention comprises a plurality of cable cores (1) and a shielding layer (2) wrapped around the outer sides of the plurality of cable cores (1); a heat dissipation layer group (3) is provided on the side of the shielding layer (2) facing away from the cable core (1); and an insulating layer (4) and a protective cover (5) are sequentially stacked and wrapped from the inside to the outside on the side of the heat dissipation layer group (3) facing away from the shielding layer (2); The heat dissipation layer group (3) comprises a first heat-conducting layer (31) and a second heat-conducting layer (32) which are arranged at intervals, the first heat-conducting layer (31) being wrapped around a side of the shielding layer (2) away from the cable core (1), the second heat-conducting layer (32) being in contact with a side of the insulating layer (4) away from the protective cover (5), a plurality of first heat-dissipating fins (33) being arranged between the first heat-conducting layer (31) and the second heat-conducting layer (32), the first heat-dissipating fins (33) being distributed radially along the cable core (1), and two ends of the first heat-dissipating fins (33) being fixedly connected to the first heat-conducting layer (31) and the second heat-conducting layer (32) respectively; The shielding layer (2) is formed by a plurality of metal wires (21) arranged circumferentially along the outer side of the cable core (1), and the metal wires (21) are arranged alternately in the horizontal direction and the vertical direction; A plurality of the first heat sinks (33) are evenly distributed along the periphery of the first heat conducting layer (31), and a gap (36) is preset between two adjacent first heat sinks (33); The first heat-conducting layer (31) is provided with a plurality of first through holes (37), and the second heat-conducting layer (32) is provided with a plurality of second through holes (38); A second heat sink (6) is provided on the side of the cable core (1) facing away from the shielding layer (2), the second heat sink (6) is in contact with the cable core (1), the second heat sink (6) is fixedly connected to the shielding layer (2) on both sides facing the shielding layer (2), a heat dissipation channel (61) is preset between two adjacent second heat sinks (6), and the heat dissipation channel (61) is connected to the first through hole (37).
2. The safe and environmentally friendly power cable with rapid heat dissipation according to claim 1, It is characterized in that A plurality of first slots (34) are provided on a side of the first heat-conducting layer (31) facing away from the cable core (1), and a plurality of second slots (35) are provided on a side of the second heat-conducting layer (32) facing away from the insulating layer (4), wherein the positions of the first slots (34) and the second slots (35) correspond one to one, and the two ends of the first heat sink (33) are respectively snapped into the first slots (34) and the second slots (35).
3. The safe and environmentally friendly power cable with rapid heat dissipation according to claim 1, It is characterized in that The second heat sink (6) is arranged in an arc shape, and the side of the second heat sink (6) facing the cable core (1) is arranged as an inner concave surface, and the inner concave surface of the second heat sink (6) is in contact with the cable core (1).
4. The safe and environmentally friendly power cable with rapid heat dissipation according to claim 1, It is characterized in that The insulating layer (4) is an insulating layer made of mica tape, and the protective cover (5) is made of silicone.