Heat-dissipating and humidity-controlling overhead cable

Abstract

The present application relates to overhead cable technical field, especially it relates to a heat dissipation and humidity control overhead cable, in order to solve the existing cable only adopts the passive resistance way of simple heat insulation layer, ultimately leading to reduce the effect of cable heat dissipation, the present application introduces the outside air into the cooling cavity through the rectangular groove on the surface of the armor layer, cooperates with the inclined baffle, blocks the rainwater at the same time, utilizes the coolant in the low temperature auxiliary coolant cavity, when the cable core generates heat and transmits the heat to the insulation layer, the spiral pipe and the spiral fin closely attached to the outer surface of the insulation layer will absorb the heat, and the coolant in the aluminum spiral pipe will cool the spiral fin and the insulation layer, since the coolant in the liquid cavity always keeps low temperature, and the coolant in the liquid cavity and the coolant in the spiral pipe are connected through the L tube, at this time, the coolant in the spiral pipe can also keep low temperature, ultimately improves the effect of cable core heat dissipation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of overhead cables, in particular to a heat-dissipating and humidity-controlling overhead cable. BACKGROUND

[0002] An overhead cable is a cable erected on a support structure such as a pole or a tower, used for power transmission or signal transmission, without being buried underground. It usually has a core made of copper or aluminum with good electrical conductivity, and is covered with multiple layers of insulation and armor. Compared with underground cables, overhead cables have the advantages of low construction cost, simple construction, convenient maintenance and repair, and are widely used in urban and rural power grids, mountainous power transmission and temporary power supply scenarios.

[0003] In the Chinese patent with application number CN221573521U, an overhead cable with heat dissipation performance is disclosed. The inside of the insulation layer is provided with a partition frame, the inside of the insulation layer is provided with a core, the surface of the insulation layer is fixedly sleeved with a corrosion-resistant layer, the surface of the corrosion-resistant layer is sleeved with a heat insulation layer, the inside of the heat insulation layer and the corrosion-resistant layer are provided with an armor sleeve, the surface of the heat insulation layer is fixedly sleeved with a protective sleeve, the surface of the protective sleeve is provided with a groove, the inside of the groove is provided with a fixed sleeve plate, the top of the fixed sleeve plate is provided with an annular hanging plate, and the bottom of the fixed sleeve plate is symmetrically provided with an installation groove. The hidden suspension function can be realized, the cable surface will not be higher than the cable surface without external force pulling, the use mode is simple and convenient, the practicality is high, the compression resistance of the cable can be improved, the internal core is prevented from being damaged due to external extrusion, and the service life of the cable is prolonged.

[0004] In the above-mentioned patent, the cable only relies on the heat insulation layer for passive heat dissipation, lacks an active heat dissipation structure, and as the use time increases, the heat insulation layer gradually ages, the heat insulation performance decreases, the external environmental heat continuously invades, and the closed space between the armor sleeve and the corrosion-resistant layer causes the heat to be difficult to dissipate. When the core is in long-time high-load operation and generates a large amount of heat, the heat cannot be discharged in time, and the heat continuously accumulates, which ultimately reduces the heat dissipation effect of the cable.

[0005] Therefore, we propose a heat-dissipating and humidity-controlling overhead cable. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the defects in the prior art. The present application provides a heat-dissipating and humidity-controlling overhead cable, which solves the problem that the cable only uses a simple passive heat dissipation method of heat insulation layer, which ultimately reduces the heat dissipation effect of the cable.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is: an air-cooled and humidity-controlled overhead cable, comprising an armored layer, a shielding layer fixedly installed on the inner wall of the armored layer, a rectangular groove formed on the outer surface of the armored layer, a cooling cavity and a liquid cavity formed in the armored layer; a composite tube fixedly installed on the inner wall of the shielding layer, a fixed disc fixedly installed on the inner wall of the composite tube, a plurality of insulation layers fixedly installed in the fixed disc, a cable core fixedly installed in the insulation layer, a spiral tube and a spiral cooling fin arranged in the fixed disc, an L-shaped tube fixedly installed at one end of the spiral tube, a plurality of cooling openings formed on the outer surface of the insulation layer, a water-blocking layer and a drying layer fixedly installed in the composite tube, the spiral tube, the spiral cooling fin and the outer surface of the insulation layer being in abutment, and one end of the L-shaped tube being in communication with the liquid cavity.

[0008] Further, a support layer is fixedly installed on one side of the fixed disc, a cooling groove is formed on the outer surface of the support layer, the spiral tube and the spiral cooling fin are located in the support layer, a communication groove is formed on the inner wall of the composite tube, the communication groove is in communication with the cooling groove, a spacing groove B is formed in the composite tube, and a drying layer is fixedly installed in the spacing groove B.

[0009] Further, a spacing groove A is also formed in the composite tube, a water-blocking layer is arranged in the spacing groove A, and the water-blocking layer is located outside the drying layer, a tube opening is formed in the inner wall of the composite tube, the water-blocking layer and the drying layer, and the tube opening is adapted to the L-shaped tube.

[0010] Further, a baffle is fixedly installed on the inner wall of the cooling cavity, a drainage opening is formed on the outer surface of the armored layer, a filter screen is fixedly installed on the inner wall of the rectangular groove, a tube opening is also formed on the inner wall of the armored layer, the tube opening is in communication with the liquid cavity, and the baffle and the drainage opening are both arranged in an inclined manner.

[0011] Further, a liquid discharge opening is formed in the composite tube, one end of the liquid discharge opening is in communication with the spacing groove B, and the other end of the liquid discharge opening is in communication with the drainage opening.

[0012] Further, the spiral tube and the spiral cooling fin are fixedly installed on the outer surface of the cooling opening in a spiral manner, the cooling openings are formed in the gap between the spiral tube and the spiral cooling fin, and one end of the spiral cooling fin is fixedly installed on the outer surface of the spiral tube.

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

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

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

[0016] Further, the drying layer is a component made of a superabsorbent resin.

[0017] Compared with the prior art, the beneficial effects of the application are that the heat-dissipating and humidity-controlling overhead cable provided by the application introduces external air into the cooling cavity through the rectangular grooves on the outer surface of the armored layer, and cooperates with the inclined baffle to cool down, and then the cooling liquid in the liquid cavity is cooled down through the cooled baffle, at the same time, the spiral pipe in the fixing disc is closely attached to the outer surface of the insulation layer with the spiral heat sink, when the cable core generates heat, the heat is transferred to the insulation layer, the spiral heat sink absorbs the heat on the surface of the insulation layer, since the spiral pipe is made of aluminum, it has high thermal conductivity, can quickly conduct the heat absorbed by the spiral heat sink to the cooling liquid in the pipe, so that the cooling liquid is heated, the heated cooling liquid is connected to the liquid cavity through the L pipe, at this time, the cooling liquid in the cooling cavity is cooled down by the air-cooled cooling liquid, the cooling liquid in the spiral pipe is cooled down, and the insulation layer is cooled down by the cooled cooling liquid, and the auxiliary heat dissipation structure of the heat dissipation port and the heat dissipation groove cooperates, finally, the heat dissipation effect of the cable core is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The disclosure of the application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for the purpose of illustration, and are not intended to limit the scope of protection of the application. In the drawings, the same reference signs are used to refer to the same parts. Among them: Figure 1 The overall schematic diagram according to one embodiment of the application is shown schematically; Figure 2 The overall internal schematic diagram according to one embodiment of the application is shown schematically; Figure 3 The overall split structure schematic diagram according to one embodiment of the application is shown schematically; Figure 4 The cable core, spiral pipe and spiral heat sink schematic diagram according to one embodiment of the application is shown schematically; Figure 5 The fixing disc schematic diagram according to one embodiment of the application is shown schematically; Figure 6 The composite pipe local split schematic diagram according to one embodiment of the application is shown schematically; Figure 7 The armored layer local split schematic diagram according to one embodiment of the application is shown schematically; Figure 8 The composite pipe internal schematic diagram according to one embodiment of the application is shown schematically; Figure 9 The spiral pipe and L pipe schematic diagram according to one embodiment of the application is shown schematically.

[0019] Label in the figure: 1, armor layer; 11, cooling cavity; 12, positioning block; 13, rectangular groove; 14, filter screen; 15, liquid cavity; 16, grid baffle; 17, drainage port; 2, shielding layer; 3, composite tube; 31, spacing groove A; 32, spacing groove B; 33, communication groove; 34, water-blocking layer; 35, drying layer; 36, liquid discharge port; 4, fixed disc; 41, support layer; 42, heat dissipation groove; 43, spiral pipe; 44, spiral fin; 45, L-shaped pipe; 5, cable core; 6, insulation layer; 61, heat dissipation port; 7, pipe opening. DETAILED DESCRIPTION

[0020] It is easy to understand that according to the technical solution of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary description of the technical solution of the present application, and should not be regarded as the whole or regarded as the limitation or restriction of the technical solution of the present application. Example one

[0021] In order to solve the technical problem of how to improve the heat dissipation effect of the cable, such as Figures 1-9As shown, the following preferred technical scheme is provided: an air-cooled and humidity-controlled overhead cable, comprising an armored layer 1, a shielding layer 2 fixedly installed on the inner wall of the armored layer 1, a rectangular slot 13 formed on the outer surface of the armored layer 1, and a cooling cavity 11 and a liquid cavity 15 formed in the armored layer 1; a composite pipe 3 fixedly installed on the inner wall of the shielding layer 2, a fixed disc 4 fixedly installed on the inner wall of the composite pipe 3, a plurality of groups of insulation layers 6 fixedly installed in the fixed disc 4, a cable core 5 fixedly installed in the insulation layer 6, a spiral pipe 43 and a spiral cooling fin 44 arranged in the fixed disc 4, an L-shaped pipe 45 fixedly installed at one end of the spiral pipe 43, a plurality of groups of heat dissipation openings 61 formed on the outer surface of the insulation layer 6, a water blocking layer 34 and a drying layer 35 fixedly installed in the composite pipe 3, the spiral pipe 43, the spiral cooling fin 44, and the outer surface of the insulation layer 6 being in abutment, one end of the L-shaped pipe 45 being in communication with the liquid cavity 15, the heat on the surface of the insulation layer 6 being absorbed by the spiral cooling fin 44, then the cooling liquid in the spiral pipe 43 being cooled due to the fact that the spiral pipe 43 is in abutment with the insulation layer 6, the heat emitted by the cable core 5 being absorbed by the spiral pipe 43, the cooling liquid in the spiral pipe 43 being cooled, the air blown from outside being introduced into the cooling cavity 11 through the rectangular slot 13, and the cooling liquid in the liquid cavity 15 being cooled, the temperature of the cooling liquid in the spiral pipe 43 being reduced due to the fact that the cooling liquid in the spiral pipe 43 is in communication with the liquid cavity 15 through the L-shaped pipe 45, the heat dissipation effect of the cable core 5 being improved, the water vapor being blocked outside the composite pipe 3 by the water blocking effect of the water blocking layer 34, the water vapor being absorbed by the drying layer 35 when the humidity of the air outside is high, the drying layer 35 being dried by the heat emitted by the cable core 5 when the humidity of the air outside is normal, and the humidity control effect being achieved through the two synergistic mechanisms.

[0022] A support layer 41 is fixedly installed on one side of the fixed disc 4, a heat dissipation slot 42 is formed on the outer surface of the support layer 41, the spiral pipe 43 and the spiral cooling fin 44 are arranged in the support layer 41, a communication slot 33 is formed on the inner wall of the composite pipe 3, the communication slot 33 is in communication with the heat dissipation slot 42, a spacing slot B32 is formed in the composite pipe 3, the drying layer 35 is fixedly installed in the spacing slot B32, the drying layer 35 is kept in a dry state through the heat dissipation slot 42 and the communication slot 33, and the drying layer 35 is dried by the heat emitted by the cable core 5 after absorbing the water vapor, thereby ensuring the drying effect of the cable.

[0023] The inner wall of the cooling cavity 11 is fixedly provided with a baffle 16, the outer surface of the armored layer 1 is provided with a drain port 17, the inner wall of the rectangular groove 13 is fixedly provided with a filter screen 14, the inner wall of the armored layer 1 is also provided with a pipe opening 7, the pipe opening 7 is in communication with the liquid cavity 15, the baffle 16 and the drain port 17 are both arranged to be inclined, the filter screen 14 can prevent impurities from entering the inside of the cooling cavity 11, and then the baffle 16 and the drain port 17 can drain the rainwater scraped from the outside into the inside of the cooling cavity 11, and the baffle 16 can also receive the low temperature and the temperature of the rainwater from the outside, so as to reduce the temperature in the inside of the liquid cavity 15 and improve the heat dissipation effect of the cable core 5.

[0024] Specifically, when the cable core 5 generates heat during operation, the spiral heat dissipation fin 44 closely attached to the outer surface of the insulation layer 6 quickly absorbs the heat on the surface of the insulation layer 6 by virtue of the large-area contact advantage, then the spiral pipe 43 rapidly conducts the heat transferred by the spiral heat dissipation fin 44 to the cooling liquid in the pipe by utilizing the high heat conduction characteristic of aluminum, at this time, the spiral pipe 43 transfers the heat to the cooling liquid to make it warm up, the warmed-up cooling liquid flows into the liquid cavity 15 through the L pipe 45 to be cooled, thereby indirectly cooling the spiral pipe 43 and the spiral heat dissipation fin 44, since the cooling liquid in the inside of the spiral pipe 43 is in communication with the cooling liquid in the inside of the liquid cavity 15 through the L pipe 45, at this time, the flowing air from the outside is introduced into the cooling cavity 11 through the rectangular groove 13, at this time, the baffle 16 in the inside of the cooling cavity 11 absorbs the flowing air from the outside to let itself be cooled, at this time, the cooled baffle 16 reduces the cooling liquid transferred to the inside of the liquid cavity 15, so as to further cool the cooling liquid in the inside of the liquid cavity 15, and meanwhile, the inclined baffle 16 can drain the rainwater entering the inside of the cooling cavity 11 through the drain port 17, since the cooling liquid always keeps a low temperature, the spiral pipe 43 can continuously and efficiently absorb the heat generated by the cable core 5, thereby realizing uninterrupted heat dissipation of the cable core 5, in addition, the communication structure of the heat dissipation groove 42 on the outer surface of the support layer 41 and the inner wall of the composite pipe 3 can accelerate the diffusion of heat to the outside, thereby improving the overall heat dissipation efficiency. Embodiment two

[0025] In order to solve the technical problem of how to keep the inside of the cable dry, as shown in Figures 1-9 the following preferred technical solutions are provided: the inside of the composite pipe 3 is also provided with a spacing groove A31, the spacing groove A31 is provided with a water-blocking layer 34, the water-blocking layer 34 is located outside the dry layer 35, the inner wall of the composite pipe 3, the water-blocking layer 34 and the dry layer 35 is provided with a pipe opening 7, the pipe opening 7 is matched with the L pipe 45, the water-blocking layer 34 can isolate the water vapor from the outside, when the water content of the air from the outside is high, the dry layer 35 can absorb the water vapor, thereby ensuring the stability of the insulation performance of the cable, the dryness of the internal structure and the long-term operation reliability.

[0026] The composite pipe 3 is internally provided with a drainage port 36, one end of the drainage port 36 is communicated with the spacing groove B32, the other end of the drainage port 36 is communicated with the water outlet 17, and the heat generated by the cable core 5 can be transported to the inside of the spacing groove B32 and the drying layer 35 is dried through the heat dissipation groove 42 and the communication groove 33, then the drying water vapor is transported to the surface of the baffle 16 through the drainage port 36, and finally discharged from the water outlet 17, completing the drying of the drying layer 35.

[0027] The spiral pipe 43 and the spiral heat dissipation fin 44 are spirally fixedly installed on the outer surface of the heat dissipation port 61, the heat dissipation port 61 is provided in the gap between the spiral pipe 43 and the spiral heat dissipation fin 44, one end of the spiral heat dissipation fin 44 is fixedly installed on the outer surface of the spiral pipe 43, the heat generated by the cable core 5 is absorbed through the spiral heat dissipation fin 44, then the heat moves to one end along the spiral heat dissipation fin 44, at this time the low temperature of the spiral pipe 43 can cool the spiral heat dissipation fin 44, thereby improving the heat dissipation of the cable core 5.

[0028] The positioning block 12 is fixedly installed on the outer surface of the armored layer 1, and the positioning block 12 is located below the liquid cavity 15. 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 sunlight irradiation of the liquid cavity 15 can be greatly reduced, thereby reducing the transmission of sunlight heat.

[0029] The spiral pipe 43 and the baffle 16 are both made of aluminum. The spiral pipe 43 can quickly transmit the low temperature of the cooling liquid to the surface of the insulation layer 6 by virtue of high thermal conductivity, accelerate the cooling of the cable core 5, and then the cooling liquid can be cooled by the outside wind through the cooperation of the liquid cavity 15 and the cooling cavity 11, so that the cooling liquid is always in a low temperature state, thereby continuously dissipating heat from the cable core 5. The baffle 16 can be cooled by absorbing the flowing wind outside, at this time, the cooled baffle 16 can reduce the cooling liquid in the liquid cavity 15, so that the cooling liquid in the liquid cavity 15 is further cooled.

[0030] The water blocking layer 34 is made of a film sheet, and the film sheet is a PET polymer film. The water blocking effect of the PET polymer film in the cable is mainly realized by molecular structure design, barrier layer compounding, surface modification and special structure construction, so as to ensure that the inside of the cable always maintains a dry environment.

[0031] The drying layer 35 is made of a high water absorption resin. The high water absorption resin can absorb the water passing through the PET polymer film, and then the heat generated by the cable core 5 can dry the high water absorption resin, thereby further improving the drying state of the cable.

[0032] Specifically, during long-term operation, if the external environment humidity increases, the water-blocking layer 34 of the outer ring of the composite tube 3 interval groove A31 will play a role first, at this time the water-blocking layer 34 will effectively block most of the water vapor penetration through the PET polymer film molecular structure density, barrier layer composite design and surface modification technology, if a small amount of water vapor penetrates the water-blocking layer 34, the inside dry 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 insulation layer 6 or the cable core 5, thereby maintaining the internal insulation environment stable. As the cable core 5 generates heat during operation, the spiral tube 43 and the spiral fin 44 will conduct the heat to the dry layer 35 in the interval groove B32 through the heat dissipation groove 42 of the support layer 41 and the inner wall communication groove 33 of the composite tube 3. At this time, the accumulated heat will dry the high water-absorbing resin that has absorbed moisture, the water vapor will be formed by the vaporization of the water, and the water vapor will be transmitted to the outside through the liquid outlet 36 in the composite tube 3. Since one end of the liquid outlet 36 is connected to the interval groove B32 and the other end is connected to the water outlet 17 of the armored layer 1, the vaporized water vapor will reach the inclined baffle 16 along this path, and finally be discharged outside the cable from the water outlet 17, thereby completing the continuous drying effect of the cable. In addition, the positioning block 12 on the outer surface of the armored layer 1 is installed in a guided manner, so that the liquid cavity 15 is below the cable, thereby reducing the accumulation of additional heat caused by direct sunlight.

[0033] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A heat-dissipating and moisture-controlled overhead cable, characterized in that, The system includes an armor layer, an inner wall of which a shielding layer is fixedly installed. A rectangular groove is formed on the outer surface of the armor layer. A cooling chamber and a liquid chamber are formed inside the armor layer. A composite tube is fixedly installed on the inner wall of the shielding layer. A fixing plate is fixedly installed on the inner wall of the composite tube. Multiple sets of insulation layers are fixedly installed inside the fixing plate. A cable core is fixedly installed inside the insulation layers. A spiral tube and spiral heat sink are arranged inside the fixing plate. An L-tube is fixedly installed at one end of the spiral tube. Multiple heat dissipation vents are formed on the outer surface of the insulation layer. A water-blocking layer and a drying layer are fixedly installed inside the composite tube. The spiral tube and spiral heat sink are in contact with the outer surface of the insulation layer. One end of the L-tube is connected to the liquid chamber. A support layer is fixedly installed on one side of the fixing plate. A heat dissipation groove is formed on the outer surface of the support layer. The spiral tube and spiral heat sink are located inside the support layer. A connecting groove is formed on the inner wall of the composite tube, connecting to the heat dissipation groove. A spacer groove B is formed inside the composite tube, and a drying layer is fixedly installed inside the spacer groove B.

2. The heat-dissipating and moisture-controlled overhead cable as described in claim 1, characterized in that: A baffle plate 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, and a pipe opening is also opened on the inner wall of the armor layer. The pipe opening is connected to the liquid chamber, and both the baffle plate and the drain outlet are inclined.

3. The heat-dissipating and moisture-controlled overhead cable as described in claim 2, characterized in that: The composite pipe also has a spacer groove A inside, and a water-blocking layer is provided inside the spacer groove A. The water-blocking layer is located on the outer ring of the drying layer. The composite pipe, the water-blocking layer, and the inner wall of the drying layer are all provided with pipe openings, and the pipe openings are adapted to L pipe.

4. The heat-dissipating and moisture-controlled overhead cable as described in claim 3, characterized in that: The composite pipe has a drain port inside. One end of the drain port is connected to the partition groove B, and the other end of the drain port is connected to the drain outlet.

5. The heat-dissipating and moisture-controlled overhead cable as described in claim 4, characterized in that: The spiral tube and the spiral heat sink 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 heat sink. One end of the spiral heat sink is fixedly installed to the outer surface of the spiral tube.

6. The heat-dissipating and moisture-controlled overhead cable as described in claim 2, 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.

7. The heat-dissipating and moisture-controlled overhead cable as described in claim 5, characterized in that: Both the spiral tube and the baffle plate are components made of aluminum.

8. The heat-dissipating and moisture-controlled overhead cable as described in claim 3, characterized in that: The water-blocking layer is a component made of a thin film, which is a PET polymer film.

9. The heat-dissipating and moisture-controlled overhead cable as described in claim 3, characterized in that: The drying layer is a component made of superabsorbent resin.

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