Aerial cable capable of dissipating heat and controlling humidity

Abstract

The invention relates to the technical field of aerial cables, in particular to an aerial cable capable of dissipating heat and controlling humidity, and aims to solve the problem that the heat dissipation effect of the cable is finally reduced due to the fact that the cable only adopts a pure heat insulation layer passive blocking mode to dissipate heat in the prior art. According to the invention, external airflow is introduced into the cooling cavity through the rectangular grooves in the outer surface of the armor layer, and an inclined grid baffle plate is matched, so that rainwater is blocked, and external low temperature is utilized to assist cooling liquid in the cooling liquid cavity at the same time; the spiral pipe and the spiral cooling fins which are tightly attached to the outer surface of the insulating layer can absorb heat, the cooling liquid in the aluminum spiral pipe can cool the spiral cooling fins and the insulating layer, the cooling liquid in the liquid cavity always keeps low temperature, the cooling liquid in the liquid cavity is communicated with the cooling liquid in the spiral pipe through the L-shaped pipe, and therefore the cooling liquid in the liquid cavity can be cooled. And at the moment, the cooling liquid in the spiral pipe can be always kept at a low temperature, and the heat dissipation effect of the cable core is finally improved.

Description

Technical Field

[0001] The present invention relates to the technical field of overhead cables, in particular to an overhead cable capable of dissipating heat and controlling humidity. Background Art

[0002] Overhead cables are cables installed on supporting structures such as poles and towers for power or signal transmission. They do not need to be buried deep underground. They are usually made of copper or aluminum with good conductivity as the cable core, covered with multiple layers of insulation material and armor. Compared with underground cables, overhead cables have the advantages of low construction cost, simple construction, and convenient maintenance and repair. They are widely used in urban and rural power grids, power transmission in mountainous areas and temporary power supply scenarios.

[0003] In the Chinese patent application number CN221573521U, an overhead cable with heat dissipation performance is disclosed, wherein a partition frame is installed inside the insulating layer, a cable core is arranged inside the insulating layer, an anti-corrosion layer is fixedly sleeved on the surface of the insulating layer, a thermal insulation layer is sleeved on the surface of the anti-corrosion layer, an armor sleeve is installed between the inside of the thermal insulation layer and the anti-corrosion layer, a sheath is fixedly sleeved on the surface of the thermal insulation layer, a groove is provided on the surface of the sheath, a fixed sleeve plate is installed inside the groove, an annular suspension plate is provided on the top of the fixed sleeve plate, and installation grooves are symmetrically provided on the bottom of the fixed sleeve plate; it can realize a hidden suspension function, and will not be higher than the cable surface when there is no external force pulling. It is simple and convenient to use and has high practicality. At the same time, it can improve the compressive resistance of the cable, avoid damage to the internal cable core due to external pulling and extrusion, and extend the service life of the cable.

[0004] In the above patent, the cable only relies on the thermal insulation layer for passive heat dissipation during operation and lacks an active heat dissipation structure. As the use time increases, the thermal insulation layer gradually ages and its thermal insulation performance decreases, allowing heat from the external environment to continue to invade. At the same time, the enclosed space between the armor sleeve and the anti-corrosion layer makes it difficult for heat to dissipate. When the cable core generates a large amount of heat during long-term high-load operation, the heat cannot be discharged in time, and the heat continues to accumulate, ultimately reducing the heat dissipation effect of the cable.

[0005] To this end, we proposed an overhead cable that can dissipate heat and control humidity. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes an overhead cable that can dissipate heat and control humidity, which solves the problem in the background technology that the cable only uses a simple insulation layer passively to dissipate heat, which ultimately reduces the heat dissipation effect of the cable.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solution: a heat-dissipating and humidity-controlling overhead cable, comprising an armor layer, a shielding layer fixedly installed on the inner wall of the armor layer, a rectangular groove provided on the outer surface of the armor layer, and a cooling chamber and a liquid chamber provided inside the armor layer; a composite tube fixedly installed on the inner wall of the shielding layer, a fixed disk fixedly installed on the inner wall of the composite tube, multiple groups of insulating layers fixedly installed inside the fixed disk, a cable core fixedly installed inside the insulating layer, a spiral tube and a spiral heat sink provided inside the fixed disk, an L tube fixedly installed on one end of the spiral tube, multiple groups of heat dissipation ports provided on the outer surface of the insulating layer, a water-blocking layer and a drying layer fixedly installed inside the composite tube, the spiral tube and the spiral heat sink fit in contact with the outer surface of the insulating layer, and one end of the L tube is connected to the liquid chamber.

[0008] Furthermore, a support layer is fixedly installed on one side of the fixed disk, a heat dissipation groove is provided on the outer surface of the support layer, the spiral tube and the spiral heat sink are located inside the support layer, a connecting groove is provided on the inner wall of the composite tube, the connecting groove is connected to the heat dissipation groove, a spacing groove B is provided inside the composite tube, and a drying layer is fixedly installed inside the spacing groove B.

[0009] Furthermore, a spacing groove A is provided inside the composite tube, a water-blocking layer is provided inside the spacing groove A, and the water-blocking layer is located outside the drying layer. A pipe opening is provided through the inner wall of the composite tube, the water-blocking layer and the drying layer, and the pipe opening is adapted to the L tube.

[0010] Furthermore, a baffle is fixedly installed on the inner wall of the cooling chamber, a drain outlet is opened on the outer surface of the armor layer, a filter screen is fixedly installed on the inner wall of the rectangular groove, a pipe outlet is also opened on the inner wall of the armor layer, the pipe outlet is connected to the liquid chamber, and the baffle and the drain outlet are both inclined.

[0011] Furthermore, a drain port is provided inside the composite pipe, one end of the drain port is connected to the spacing groove B, and the other end of the drain port is connected to the water outlet.

[0012] Furthermore, the spiral tube and the spiral fin are spirally fixedly installed on the outer surface of the heat dissipation port, the heat dissipation port is opened in the gap between the spiral tube and the spiral fin, and one end of the spiral fin is fixedly installed on the outer surface of the spiral tube.

[0013] Furthermore, a positioning block is fixedly installed on the outer surface of the armor layer, and the positioning block is located below the liquid cavity.

[0014] Furthermore, the spiral tube and the baffle are both components made of aluminum.

[0015] Furthermore, the water-blocking layer is a component made of a film sheet, and the film sheet is a PET polymer film.

[0016] Furthermore, the drying layer is a member made of a highly water-absorbent resin.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a heat-dissipating and humidity-controlling overhead cable, which introduces external airflow into the cooling chamber through the rectangular grooves on the outer surface of the armor layer, and cools the air in cooperation with the inclined baffles. Subsequently, the coolant in the liquid chamber is cooled by the cooling baffles. At the same time, the spiral tube in the fixed disk and the spiral heat sink are tightly fitted on the outer surface of the insulation layer. When the cable core generates heat during operation, the heat is transferred to the insulation layer, and the spiral heat sink absorbs the heat on the surface of the insulation layer. Since the spiral tube is made of aluminum and has high thermal conductivity, the heat absorbed by the spiral heat sink can be quickly transferred to the coolant in the tube, causing the coolant to heat up. The heated coolant is connected to the liquid chamber through the L tube. At this time, the coolant in the cooling chamber that has been air-cooled will cool the coolant inside the spiral tube. The insulation layer is cooled by the cooled coolant, and the auxiliary heat dissipation structures of the heat dissipation port and the heat dissipation groove work together to ultimately improve the heat dissipation effect of the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them: Figure 1 The figure schematically shows an overall schematic diagram according to one embodiment of the present invention; Figure 2 The figure schematically shows an overall internal diagram according to one embodiment of the present invention; Figure 3 The figure schematically shows a schematic diagram of an overall split structure proposed according to one embodiment of the present invention; Figure 4 The figure schematically shows a cable core, a spiral tube and a spiral heat sink according to one embodiment of the present invention; Figure 5 A schematic diagram of a fixed disk according to an embodiment of the present invention is shown; Figure 6 Schematically shows a partial disassembly diagram of a composite tube according to one embodiment of the present invention; Figure 7 The figure schematically shows a partial splitting diagram of an armor layer according to one embodiment of the present invention; Figure 8 Schematically shows the interior of a composite tube according to one embodiment of the present invention; Figure 9 The figure schematically shows a schematic diagram of a spiral tube and an L-tube proposed according to one embodiment of the present invention.

[0019] Numbers in the figure: 1. Armor layer; 11. Cooling chamber; 12. Positioning block; 13. Rectangular groove; 14. Filter screen; 15. Liquid chamber; 16. Baffle plate; 17. Drain port; 2. Shielding layer; 3. Composite pipe; 31. Spacing groove A; 32. Spacing groove B; 33. Connecting groove; 34. Water-blocking layer; 35. Drying layer; 36. Drain port; 4. Fixing plate; 41. Support layer; 42. Heat dissipation groove; 43. Spiral pipe; 44. Spiral heat sink; 45. L-tube; 5. Cable core; 6. Insulation layer; 61. Heat dissipation port; 7. Pipe port. DETAILED DESCRIPTION

[0020] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention. Example 1

[0021] In order to solve the technical problem of how to improve the heat dissipation effect of cables, such as Figures 1-9As shown, the following preferred technical solutions are provided: an overhead cable with heat dissipation and humidity control, comprising an armor layer 1, a shielding layer 2 is fixedly installed on the inner wall of the armor layer 1, a rectangular groove 13 is provided on the outer surface of the armor layer 1, and a cooling chamber 11 and a liquid chamber 15 are provided inside the armor layer 1; a composite tube 3 is fixedly installed on the inner wall of the shielding layer 2, a fixed disk 4 is fixedly installed on the inner wall of the composite tube 3, multiple groups of insulating layers 6 are fixedly installed inside the fixed disk 4, a cable core 5 is fixedly installed inside the insulating layer 6, a spiral tube 43 and a spiral heat sink 44 are provided inside the fixed disk 4, an L tube 45 is fixedly installed on one end of the spiral tube 43, multiple groups of heat dissipation ports 61 are provided on the outer surface of the insulating layer 6, a water-blocking layer 34 and a drying layer 35 are fixedly installed inside the composite tube 3, the spiral tube 43 and the spiral heat sink 44 are in contact with the outer surface of the insulating layer 6, one end of the L tube 45 is connected to the liquid chamber 15, and the heat on the surface of the insulating layer 6 can be absorbed by the heat absorption of the spiral heat sink 44, and then due to the spiral tube Cooling liquid is provided inside 43, and the inner wall of the spiral tube 43 is in contact with the insulating layer 6. The spiral tube 43 will absorb the heat emitted by the cable core 5, allowing the cooling liquid inside the spiral tube 43 to cool down, and the rectangular groove 13 can introduce the wind blown from the outside into the cooling chamber 11, thereby cooling the cooling liquid inside the liquid chamber 15. Since the cooling liquid inside the spiral tube 43 is connected to the liquid chamber 15 through the L tube 45, when the cooling liquid inside the liquid chamber 15 is cooled, the temperature of the cooling liquid inside the spiral tube 43 will also decrease, thereby improving the heat dissipation effect of the cable core 5. Finally, the water-blocking layer 34 can isolate water vapor from the outside of the composite tube 3. When the humidity of the outside air is high, the drying layer 35 can also absorb water vapor. After the outside humidity returns to normal, the heat dissipated by the cable core 5 will also dry the drying layer 35, thereby achieving the effect of humidity control. At this point, the heat dissipation and humidity control effects are achieved through two synergistic mechanisms.

[0022] A supporting layer 41 is fixedly installed on one side of the fixed disk 4, and a heat dissipation groove 42 is provided on the outer surface of the supporting layer 41. The spiral tube 43 and the spiral heat sink 44 are located inside the supporting layer 41. A connecting groove 33 is provided on the inner wall of the composite tube 3, and the connecting groove 33 is connected to the heat dissipation groove 42. A spacing groove B32 is provided inside the composite tube 3, and a drying layer 35 is fixedly installed inside the spacing groove B32. The drying layer 35 can be kept in a dry state through the heat dissipation groove 42 and the connecting groove 33. After the drying layer 35 absorbs water vapor, the drying layer 35 can also be dried by the heat emitted by the cable core 5, thereby ensuring the cable drying effect.

[0023] A baffle plate 16 is fixedly installed on the inner wall of the cooling chamber 11, a drain port 17 is provided on the outer surface of the armor layer 1, a filter screen 14 is fixedly installed on the inner wall of the rectangular groove 13, and a pipe port 7 is also provided on the inner wall of the armor layer 1. The pipe port 7 is connected to the liquid chamber 15, and the baffle plate 16 and the drain port 17 are both inclined. The filter screen 14 can prevent impurities from entering the cooling chamber 11, and the baffle plate 16 and the drain port 17 can discharge rainwater scraped from the outside into the cooling chamber 11. The baffle plate 16 can also receive the low temperature of the outside and the temperature of the rainwater, thereby reducing the temperature inside the liquid chamber 15 and improving the heat dissipation effect of the cable core 5.

[0024] Specifically, first, when the cable core 5 generates heat during operation, the spiral heat sink 44 close to the outer surface of the insulating layer 6 quickly absorbs the heat from the surface of the insulating layer 6 by virtue of its large contact area. Subsequently, the spiral tube 43 uses the high thermal conductivity of aluminum to quickly transfer the heat transferred by the spiral heat sink 44 to the coolant in the tube. At this time, the spiral tube 43 transfers the heat to the coolant to heat it up. The heated coolant flows into the liquid cavity 15 through the L tube 45 for cooling, thereby achieving indirect cooling of the spiral tube 43 and the spiral heat sink 44. Since the coolant inside the spiral tube 43 is connected to the coolant inside the liquid cavity 15 through the L tube 45, at this time, the outside flowing air is introduced into the cooling liquid through the rectangular groove 13. Temperature chamber 11, at this time the baffle plate 16 inside the cooling chamber 11 will absorb the wind flowing from the outside to cool itself down, and at this time the cooling baffle plate 16 will reduce the coolant transmitted to the inside of the liquid chamber 15, so that the coolant inside the liquid chamber 15 can be further cooled. At the same time, the inclined baffle plate 16 can discharge the rainwater entering the cooling chamber 11 through the drain port 17. Since the coolant always maintains a low temperature state, the spiral tube 43 is able to continuously and efficiently absorb the heat emitted by the cable core 5, thereby realizing uninterrupted heat dissipation of the cable core 5. In addition, the connecting structure between the heat dissipation groove 42 on the outer surface of the supporting layer 41 and the inner wall of the composite tube 3 can accelerate the diffusion of heat to the outside and improve the overall heat dissipation efficiency. Example 2

[0025] In order to solve the technical problem of how to keep the inside of the cable dry, such as Figures 1-9 As shown, the following preferred technical solution is provided: a spacing groove A31 is further provided inside the composite tube 3, a water-blocking layer 34 is provided inside the spacing groove A31, and the water-blocking layer 34 is located on the outer circle of the drying layer 35. A pipe opening 7 is provided through the inner wall of the composite tube 3, the water-blocking layer 34, and the drying layer 35, and the pipe opening 7 is adapted to the L-tube 45. The water vapor from the outside can be isolated by the water-blocking layer 34. When the moisture content of the outside air is high, the drying layer 35 will absorb the water vapor, thereby ensuring the stable insulation performance of the cable, the dry internal structure and the long-term operation reliability.

[0026] A drain port 36 is provided inside the composite tube 3, one end of the drain port 36 is connected to the spacing groove B32, and the other end of the drain port 36 is connected to the drain port 17. The heat generated by the cable core 5 can be transported to the interior of the spacing groove B32 through the heat dissipation groove 42 and the connecting groove 33 to dry the drying layer 35. Then, the dried water vapor will be transported to the surface of the baffle plate 16 through the drain port 36, and finally discharged from the drain port 17 to complete the drying of the drying layer 35.

[0027] The spiral tube 43 and the spiral heat sink 44 are spirally fixed on the outer surface of the heat dissipation port 61. The heat dissipation port 61 is opened in the gap between the spiral tube 43 and the spiral heat sink 44. One end of the spiral heat sink 44 is fixed to the outer surface of the spiral tube 43. The heat emitted by the cable core 5 is absorbed by the spiral heat sink 44, and then the heat will move to one end along the spiral heat sink 44. At this time, the low temperature of the spiral tube 43 itself will cause the spiral heat sink 44 to cool down, thereby improving the heat dissipation of the cable core 5.

[0028] A positioning block 12 is fixedly installed on the outer surface of the armor layer 1. The positioning block 12 is located below the liquid cavity 15. Through the setting of the positioning block 12, when the cable is installed, the positioning block 12 is set downward, so that the liquid cavity 15 is placed below the cable. At this time, the liquid cavity 15 can greatly reduce sunlight exposure and thus reduce the transfer of sunlight heat.

[0029] The spiral tube 43 and the baffle plate 16 are both components made of aluminum. Due to the high thermal conductivity of the spiral tube 43, the low temperature of the coolant is quickly transferred to the surface of the insulating layer 6, accelerating the cooling of the cable core 5. The liquid cavity 15 cooperates with the cooling cavity 11 to allow the external wind to cool the coolant, so that the coolant can be kept in a low temperature state, thereby continuously dissipating heat to the cable core 5. The baffle plate 16 will absorb the external flowing wind to cool itself. At this time, the cooling baffle plate 16 will reduce the coolant transmitted to the inside of the liquid cavity 15, allowing the coolant inside the liquid cavity 15 to further cool down.

[0030] The water-blocking layer 34 is a component made of a film sheet, which is a PET polymer film. The water-blocking effect of the PET polymer film inside the cable is mainly achieved through molecular structure design, barrier layer composite, surface modification and special structure construction to ensure that the inside of the cable always maintains a dry environment.

[0031] The drying layer 35 is made of a highly absorbent resin, which can absorb moisture that passes through the PET polymer film. The heat generated by the cable core 5 then dries the highly absorbent resin, thereby further improving the dryness of the cable.

[0032] Specifically, during long-term operation, if the humidity of the external environment increases, the water-blocking layer 34 of the outer ring of the spacing groove A31 of the composite tube 3 will take the lead in playing a role. At this time, the water-blocking layer 34 will effectively block most of the water vapor from penetrating through the molecular structure density of the PET polymer film itself, the composite design of the barrier layer and the surface modification technology. If a small amount of water vapor penetrates the water-blocking layer 34, the inner drying layer 35 will use the porous network structure of the water-absorbing resin to quickly absorb the water vapor and avoid the water vapor from contacting the insulating layer 6 or the cable core 5, so as to maintain the stability of the internal insulation environment. As the cable core 5 generates heat during operation, the spiral tube 43 and the spiral heat sink 44 will transfer the heat through the support layer during the heat dissipation process. The heat dissipation groove 42 of 41 and the connecting groove 33 on the inner wall of the composite tube 3 are conducted to the drying layer 35 in the spacing groove B32. At this time, the accumulated heat dries the highly absorbent resin that has absorbed moisture, and the moisture is vaporized by the heat. The formed water vapor is transmitted to the outside through the drain port 36 inside the composite tube 3. Since one end of the drain port 36 is connected to the spacing groove B32 and the other end leads to the drain port 17 of the armor layer 1, the vaporized water vapor reaches the inclined baffle 16 along this path and is finally discharged from the drain port 17 to the outside of the cable, completing the continuous drying effect of the cable. In addition, the positioning block 12 on the outer surface of the armor layer 1 is installed and guided so that the liquid cavity 15 is located below the cable, reducing the accumulation of additional heat caused by direct sunlight.

[0033] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An overhead cable capable of dissipating heat and controlling humidity, characterized in that: It includes an armor layer, a shielding layer is fixedly installed on the inner wall of the armor layer, a rectangular groove is provided on the outer surface of the armor layer, and a cooling chamber and a liquid chamber are provided inside the armor layer; a composite tube is fixedly installed on the inner wall of the shielding layer, a fixed disk is fixedly installed on the inner wall of the composite tube, multiple groups of insulating layers are fixedly installed inside the fixed disk, a cable core is fixedly installed inside the insulating layer, a spiral tube and a spiral heat sink are arranged inside the fixed disk, an L tube is fixedly installed on one end of the spiral tube, multiple groups of heat dissipation ports are provided on the outer surface of the insulating layer, a water-blocking layer and a drying layer are fixedly installed inside the composite tube, the spiral tube and the spiral heat sink are in contact with the outer surface of the insulating layer, and one end of the L tube is connected to the liquid chamber.

2. The heat dissipation and humidity control overhead cable according to claim 1, characterized in that: A support layer is fixedly installed on one side of the fixed disk, a heat dissipation groove is provided on the outer surface of the support layer, the spiral tube and the spiral heat sink are located inside the support layer, a connecting groove is provided on the inner wall of the composite tube, the connecting groove is connected to the heat dissipation groove, a spacing groove B is provided inside the composite tube, and a drying layer is fixedly installed inside the spacing groove B.

3. The heat dissipation and humidity control overhead cable according to claim 2, characterized in that: A baffle is fixedly installed on the inner wall of the cooling chamber, a drain outlet is provided on the outer surface of the armor layer, a filter is fixedly installed on the inner wall of the rectangular groove, a pipe outlet is also provided on the inner wall of the armor layer, and the pipe outlet is connected to the liquid chamber. The baffle and the drain outlet are both inclined.

4. The heat dissipation and humidity control overhead cable according to claim 3, characterized in that: The composite tube is further provided with a spacing groove A, the spacing groove A is provided with a water blocking layer, the water blocking layer is located outside the drying layer, and a pipe opening is provided through the inner wall of the composite tube, the water blocking layer and the drying layer, and the pipe opening is adapted to the L tube.

5. The heat dissipation and humidity control overhead cable according to claim 4, characterized in that: A drainage port is provided inside the composite pipe, one end of the drainage port is connected to the spacing groove B, and the other end of the drainage port is connected to the water outlet.

6. The heat dissipation and humidity control overhead cable according to claim 5, characterized in that: The spiral tube and the spiral fin are spirally fixedly mounted on the outer surface of the heat dissipation port. The heat dissipation port is opened in the gap between the spiral tube and the spiral fin. One end of the spiral fin is fixedly mounted on the outer surface of the spiral tube.

7. The heat dissipation and humidity control overhead cable according to claim 6, characterized in that: A positioning block is fixedly installed on the outer surface of the armor layer, and the positioning block is located below the liquid cavity.

8. The heat dissipation and humidity control overhead cable according to claim 6, characterized in that: The spiral tube and the baffle plate are both components made of aluminum.

9. The heat dissipation and humidity control overhead cable according to claim 4, characterized in that: The water-blocking layer is a component made of a film sheet, and the film sheet is a PET polymer film.

10. The heat dissipation and humidity control overhead cable according to claim 4, characterized in that: The drying layer is made of a highly water-absorbent resin.

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