An efficiently heat-dissipating cross-linked polyethylene insulated cable

Abstract

The present invention discloses a highly efficient heat-dissipating cross-linked polyethylene insulated cable, which includes a cable core, an inner protective layer, a metal shielding layer, an outer protective layer, a heat-conducting filling layer, and a heat-dissipating mechanism. The adjacent two heat-dissipating mechanisms are connected by a hose; the heat-dissipating mechanism includes a main duct, a partition plate, an air inlet pipe, an air outlet pipe, and a radiator; the main duct is arranged inside the inner protective layer; the partition plate divides the interior of the main duct into a front cavity and a rear cavity; the air inlet pipe is sleeved in the front cavity of the main duct; the air outlet pipe is sleeved in the rear cavity of the main duct; the number of radiators is multiple and they are arranged among the cable cores on the periphery of the main duct; the radiator includes a main heat dissipation plate, a front flow guide plate, and a rear flow guide plate, all of which are of a hollow structure. By arranging the heat-dissipating mechanism in the cross-linked polyethylene insulated cable, the present invention can efficiently and quickly conduct heat from the middle of the cable to the outer edge of the cable with the cooperation of wind, and utilize the heat dissipation surface of the main heat dissipation plate, which is much larger than the middle of the cable, to conduct rapid heat dissipation, with a fast heat dissipation speed and a high heat dissipation efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field, and particularly relates to a highly efficient heat dissipation type cross-linked polyethylene insulated cable. Background Art

[0002] Cross-linked polyethylene insulated cables are mainly used in distribution networks or industrial installations with a rated power frequency voltage of 0.6 / 1 kV and below, and are a relatively common type of cable in power transmission. During power transmission, the cable generates a large amount of heat. For cross-linked polyethylene insulated cables, especially multi-core cross-linked polyethylene insulated cables, the heat generated during power transmission continuously accumulates in the center of the cable and is difficult to quickly dissipate outward, resulting in a continuous increase in the temperature at the center of the cable, softening the cable insulation layer and protective layer, reducing the service life of the cable. When the temperature at the center of the cable exceeds the ignition point of the insulation layer and protective layer, it will also cause the cable to burn, resulting in serious fire accidents. Summary of the Invention

[0003] To solve the above problems, the purpose of the present invention is to provide a highly efficient heat dissipation type cross-linked polyethylene insulated cable with a heat dissipation mechanism, fast heat dissipation speed, and high heat dissipation efficiency.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] The beneficial effects of the present invention are as follows:

[0006] An efficient heat-dissipating cross-linked polyethylene insulated cable includes multiple cable cores and an inner protective layer that wraps all the cable cores. An outer metal shielding layer and an outer protective layer are successively wrapped outside the inner protective layer. A heat-conducting filling layer is also filled between the cable cores and the inner protective layer. It further includes multiple heat-dissipating mechanisms arranged inside the inner protective layer and wrapped in the heat-conducting filling layer, and adjacent two heat-dissipating mechanisms are connected by a hose; the heat-dissipating mechanism includes a main conduit, a partition plate, an air inlet pipe, an air outlet pipe, and a radiator; the main conduit is arranged in the center inside the inner protective layer along the length direction of the cable cores, and all the cable cores are arranged outside the main conduit; the partition plate is fixed inside the main conduit and divides the inside of the main conduit into a front cavity and a rear cavity; the air inlet pipe is sleeved in the front cavity of the main conduit, one end is close to the partition plate, and the other end extends outside the main conduit; the air outlet pipe is sleeved in the rear cavity of the main conduit, one end is close to the partition plate, and the other end extends outside the main conduit; the number of radiators is multiple and they are arranged between the cable cores outside the main conduit; the radiator includes a main heat dissipation plate, a front diversion plate, and a rear diversion plate that are all of a hollow structure; the main heat dissipation plate is attached to the inner wall of the inner protective layer along the length direction of the cable cores; the two ends of the front diversion plate are respectively fixed on the main conduit and the main heat dissipation plate and connect the front cavity of the main conduit with one end inside the main heat dissipation plate; the two ends of the rear diversion plate are respectively fixed on the main conduit and the main heat dissipation plate and connect the rear cavity of the main conduit with the other end inside the main heat dissipation plate; one end of the hose is connected to the air inlet pipe of one adjacent heat-dissipating mechanism, and the other end is connected to the air inlet pipe of another adjacent heat-dissipating mechanism.

[0007] By arranging a heat-dissipating mechanism in the cross-linked polyethylene insulated cable, the present invention efficiently and quickly conducts heat from the middle of the cable to the outer edge of the cable with the cooperation of wind, and uses the heat dissipation surface of the main heat dissipation plate that is much larger than the middle of the cable to quickly dissipate heat, improving the heat dissipation speed of the cable and increasing the heat dissipation efficiency. Description of the Drawings

[0008] The following further details the structure of the present invention with reference to the drawings.

[0009] Figure 1 It is a sectional view of the efficient heat-dissipating cross-linked polyethylene insulated cable of the present invention along the axial direction.

[0010] Figure 2 It is for the efficient heat-dissipating cross-linked polyethylene insulated cable of the present invention along Figure 1 the sectional view in the A-A direction.

[0011] Figure 3 It is a schematic structural diagram of the heat-dissipating mechanism in the efficient heat-dissipating cross-linked polyethylene insulated cable of the present invention.

[0012] As shown in the figure: 1 - cable core, 2 - heat-conducting filling layer, 3 - inner protective layer, 4 - metal shielding layer, 5 - outer protective layer, 6 - heat dissipation mechanism, 601 - main duct, 6011 - front cavity, 6012 - rear cavity, 602 - intake pipe, 603 - radiator, 6031 - front deflector, 60311 - cross plate, 6032 - heat-conducting rod, 6033 - main heat dissipation plate, 60331 - baffle, 6034 - rear deflector, 604 - partition board, 605 - auxiliary heat dissipation fins, 606 - exhaust pipe, 7 - hose, 8 - heat dissipation fins. Detailed implementation manners

[0013] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0014] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" used in this specification are only for the convenience of description and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0015] 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 those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. It should be noted that the terms "including", "comprising" or any other variant are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not clearly listed, or further includes elements inherent to this process, method, article or device. Embodiment 1

[0016] AsFigure 1 With Figure 2 As shown, this embodiment provides a highly efficient heat dissipation type cross-linked polyethylene insulated cable, including a cable core 1, a heat-conducting filling layer 2, an inner protective layer 3, a metal shielding layer 4, an outer protective layer 5, a heat dissipation mechanism 6, and a hose 7.

[0017] Among them, the cable core 1, the heat-conducting filling layer 2, the inner protective layer 3, the metal shielding layer 4, and the outer protective layer 5 are all structures of conventional cables, and their materials are all conventional materials. The cable core is four and evenly arranged. Each cable core 1 includes a conductor 101, a semi-conductive shielding layer 102, and an insulating layer 103; the conductor 101 is composed of multiple metal wires stranded together, and the metal wires are copper wires or aluminum alloy wires; the semi-conductive shielding layer 102 is arranged between the conductor 101 and the insulating layer 103; the insulating layer 103 is located on the outermost layer and is made of cross-linked polyethylene. The inner protective layer 3 wraps all the cable cores 1 therein, and at the same time, a copper shielding layer 4 and an outer protective layer 5 are successively wrapped outside the inner protective layer 3. A heat-conducting filling layer 2 is also filled between the cable core 1 and the inner protective layer 3, and the heat-conducting filling layer 2 is made of a non-metallic heat-conducting material (such as polystyrene, polypropylene, etc.).

[0018] The number of the heat dissipation mechanisms 6 is multiple and they are arranged along the length direction of the cable core 1. The heat dissipation mechanisms 6 are arranged inside the inner protective layer 3 and are wrapped in the heat-conducting filling layer 2. Adjacent two heat dissipation mechanisms 6 are connected by a hose 7.

[0019] As Figures 1-3 shown, each heat dissipation mechanism 6 includes a main duct 601, a partition 604, an intake pipe 602, an exhaust pipe 606, and a radiator 603.

[0020] The main duct 601 is a cylindrical hollow tube with both ends closed. The main duct 601 is arranged along the length direction of the cable core 1 at the center inside the inner protective layer 3, and the four cable cores 1 are evenly arranged around the main duct 601.

[0021] The partition 604 is fixed in the middle inside the main duct 601 and divides the inside of the main duct 601 into a front cavity 6011 and a rear cavity 6012.

[0022] The intake pipe 602 is sleeved inside the front cavity 6011 of the main duct 601, and both ends thereof are open. One end of the intake pipe 602 is close to the partition 604 (not in contact with the partition 604 and having a gap), and the other end extends outside the main duct 601 (its outer wall is fixedly connected to the end of the main duct 601).

[0023] The exhaust pipe 606 is sleeved inside the rear cavity 6012 of the main duct 601, and both ends thereof are open. One end of the exhaust pipe 606 is close to the partition 604 (not in contact with the partition 604 and having a gap), and the other end extends outside the main duct 601 (its outer wall is fixedly connected to the end of the main duct 601).

[0024] The number of the radiators 603 is four, and they are arranged between the cable cores 1 on the periphery of the main duct 601; one radiator 603 is provided between every two adjacent cable cores 1. Each radiator 603 includes a main heat dissipation plate 6033, a front deflector 6031 and a rear deflector 6034.

[0025] The main heat dissipation plate 6033 is an arc-shaped plate bent along the circumferential direction of the inner protective layer 3, with a hollow interior. The main heat dissipation plate 6033 is attached to the inner wall of the inner protective layer 3 along the length direction of the cable core 1. The width of the main heat dissipation plate 6033 is much larger than the widths of the front deflector 6031 and the rear deflector 6034, and its arc length along the circumferential direction of the inner protective layer 3 is about one-eighth of the circumferential arc length of the inner wall of the inner protective layer 3, having a relatively wide heat dissipation surface and being close to the outer side of the cable, and the heat dissipation speed is fast.

[0026] The front deflector 6031 is a rectangular hollow plate body vertically arranged between the main duct 601 and the main heat dissipation plate 6033 and close to the front cavity 6011 side of the main duct 601. As a heat conduction and diversion channel, one end of the front deflector 6031 is fixed on the main duct 601 and is connected to the front cavity 6011 inside the main duct 601 away from the partition 604 side through a preset hole on the main duct 601, and the other end of the front deflector 6031 is fixed on one end of the main heat dissipation plate 6033 and is connected to the inside of the main heat dissipation plate 6033 through a preset hole on the main heat dissipation plate 6033.

[0027] The rear deflector 6034 is a rectangular hollow plate body vertically arranged between the main duct 601 and the main heat dissipation plate 6033 and close to the rear cavity 6012 side of the main duct 601. As a heat conduction and diversion channel, one end of the rear deflector 6034 is fixed on the main duct 601 and is connected to the rear cavity 6012 inside the main duct 601 away from the partition side through a preset hole on the main duct 601, and the other end of the rear deflector 6034 is fixed on the other end of the main heat dissipation plate 6033 and is connected to the inside of the main heat dissipation plate 6033 through a preset hole on the main heat dissipation plate 6033.

[0028] Both ends of the hose 7 are respectively connected to the heat dissipation mechanism 6. One end of the hose 7 is connected to the intake pipe 602 of one adjacent heat dissipation mechanism 6, and the other end is connected to the exhaust pipe 606 of another adjacent heat dissipation mechanism 6. The existence of the hose 7 can ensure that the cable has a certain degree of bend.

[0029] Under the action of a fan or an air pump, the air flow is blown into the air flow channel formed by the hose 7 and the heat dissipation mechanism 6 from the hose 7 or the intake pipe 602 at the end of the cable, and finally flows out from the hose 7 or the intake pipe 602 at the other end of the cable, taking away a large amount of heat inside the cable at the same time.

[0030] Working principle:

[0031] There are three heat dissipation paths for the heat dissipation mechanism 6:

[0032] Heat dissipation path one: The main duct 601 absorbs the heat in the center of the cable. The heat is transmitted radially outward from the main duct 601. In addition to being slowly transmitted along the heat-conducting filling layer 2, the main transmission path is to be transmitted to the main heat dissipation plate 6033 at a relatively fast speed along the front deflector 6031 and the rear deflector 6034, and the large heat dissipation surface of the main heat dissipation plate 6033 is used for rapid heat dissipation.

[0033] Heat dissipation path two: The cold air flow that has absorbed the heat of the hose 7 and the inner wall of the heat dissipation mechanism 6 is blown into the main duct 601 from the intake pipe 602 and flows along the annular channel formed between the main duct 601 and the intake pipe 602 to further absorb the heat inside the main duct 601 (perform heat exchange with the inner wall of the main duct 601, and the main duct 601 absorbs the heat in the center of the cable). Then it enters the front deflector 6031 to perform heat exchange with the inner wall of the front deflector 6031 and absorb the heat of the front deflector 6031, and the temperature of the air flow further rises. Then it flows outward into the main heat dissipation plate 6033 and flows from one end of the main heat dissipation plate 6033 to the other end. The main heat dissipation plate 6033 is located on the outer edge of the cable, and its temperature is much lower than the temperature of the air flow entering it and has a large heat dissipation surface. It performs heat exchange with the air flow entering it, the temperature of the main heat dissipation plate 6033 rises (while further conducting heat outward to cool down), and the temperature of the air flow decreases. The air flow that has completed the heat exchange enters the rear deflector 6034 to perform heat exchange with the inner wall of the rear deflector 6034, and the temperature rises. Then it enters the main duct 601 and flows along the annular channel formed between the main duct 601 and the outlet pipe 606 to further absorb the heat inside the main duct 601 (perform heat exchange with the inner wall of the main duct 601, and the main duct 601 absorbs the heat in the center of the cable). Then it enters the hose 7 to absorb the heat of the hose 7, and then enters the next heat dissipation mechanism 9 to repeat the above heat exchange route to achieve heat exchange and heat dissipation.

[0034] Heat dissipation path three: The heat in and near the cable center is transferred to the inner wall of the front deflector 6031 through the outer wall of the front deflector 6031 and then to the air flow. At the same time, the heat in and near the cable center is also transferred to the inner wall of the rear deflector 6034 through the inner and outer walls of the rear deflector 6034, and then to the air flow. Finally, the air flow becomes a hot air flow and dissipates the heat outside the cable (when the air flow flows inside the front deflector 6031 and the rear deflector 6034, it will take away the heat of the inner walls of the front deflector 6031 and the rear deflector 6034, forming a temperature difference between their inner and outer sides. After that, the heat on the outer walls of the front deflector 6031 and the rear deflector 6034 will automatically flow towards the inside of the front deflector 6031 and the rear deflector 6034, forming a temperature difference between their outer walls and the cable center and its vicinity, so that the heat in and near the cable center is automatically transferred to the outer walls of the front deflector 6031 and the rear deflector 6034).

[0035] Through the above three main heat dissipation paths, the heat dissipation of the cable center and its vicinity is efficiently achieved, protecting the cable and ensuring the service life of the cable. Embodiment 2

[0036] In order to further improve the heat exchange efficiency, the following structure is added to this embodiment on the basis of Embodiment 1: A plurality of baffles 60331 are provided at the position between the front deflector 6031 and the rear deflector 6034 inside the main heat dissipation plate 6033 to expand the heat exchange area. The baffles 60331 divide the inside of the main heat dissipation plate 6033 into multiple cavities. Each baffle 60331 is perpendicular to the length direction of the cable core 1. A plurality of ventilation holes (holes with a diameter of 2 - 5 mm) are provided on each baffle 60331. After the air flow is blocked by the baffle 60331 and blown into another cavity through the ventilation holes, due to heat exchange with the previous baffle 60331, the temperature decreases. After the air flow passes through all the baffles 60331 in sequence, the temperature drops significantly to complete the heat exchange. A plurality of transverse plates 60311 are fixedly arranged horizontally and alternately inside the front deflector 6031, thereby forming a serpentine channel inside the front deflector 6031 to increase the heat exchange surface. A plurality of channels connecting the main heat dissipation plate and the rear cavity of the main conduit are provided inside the rear deflector. The channels are straight channels or serpentine channels, so that the air flow that has completed heat exchange and temperature reduction in the main heat dissipation plate 6033 exchanges heat with the rear deflector 6034 and its surroundings again to reduce the temperature of the cable center and its vicinity. At the same time, a plurality of heat conducting rods 6032 are provided on the outer sides of the front deflector and the rear deflector to increase the heat exchange area. A plurality of heat dissipation fins are evenly distributed on the outer wall of the hose 7 to facilitate heat exchange between the hose 7 and the cable and efficiently absorb the heat at the cable center. Embodiment 3

[0037] To further achieve heat exchange and efficiently transfer the heat of the cable center and the main duct 601 to the main heat dissipation plate 6033 for heat dissipation, the following structure is added in this embodiment based on Embodiment 1 or Embodiment 2.

[0038] Each heat dissipation mechanism 6 further includes at least one auxiliary heat dissipation fin 605; both ends of the auxiliary heat dissipation fin 605 are respectively fixed on the main heat dissipation plate 6033 and the main duct 601.

[0039] Other details not elaborated in the present invention are conventional technologies well known to those skilled in the art.

[0040] It should be noted that the term "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0041] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments. Any modification, equivalent replacement, improvement, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-efficiency heat dissipation cross-linked polyethylene insulated cable, comprising a plurality of cable cores and an inner protective layer wrapping all the cable cores, a metal shielding layer and an outer protective layer being wrapped outside the inner protective layer in sequence, and a heat-conducting filling layer being filled between the cable core and the inner protective layer, characterized in that: It also includes a plurality of heat dissipation mechanisms arranged inside the inner protective layer and wrapped in the heat conductive filling layer, and two adjacent heat dissipation mechanisms are connected by a hose; the heat dissipation mechanism includes a main pipe, a partition, an air inlet pipe, an air outlet pipe and a radiator; The main conduit is arranged in the center of the inner protective layer along the length direction of the cable core, and all the cable cores are arranged on the periphery of the main conduit; The partition is fixed inside the main duct and divides the inside of the main duct into a front cavity and a rear cavity; The air inlet pipe is sleeved in the front cavity of the main pipe, one end of which is arranged close to the partition plate and the other end extends outside the main pipe; The air outlet pipe is sleeved in the rear cavity of the main pipe, one end of which is arranged close to the partition plate and the other end extends outside the main pipe; There are multiple radiators, which are arranged between the cable cores outside the main conduit; The radiator comprises a main heat sink, a front guide plate and a rear guide plate, all of which are hollow structures; the main heat sink is attached to the inner wall of the inner protective layer along the length direction of the cable core; the two ends of the front guide plate are respectively fixed to the main duct and the main heat sink, and the front cavity of the main duct is connected to one end inside the main heat sink; the two ends of the rear guide plate are respectively fixed to the main duct and the main heat sink, and the rear cavity of the main duct is connected to the other end inside the main heat sink; One end of the hose is connected to the air inlet pipe of one of the adjacent heat dissipation mechanisms, and the other end is connected to the air outlet pipe of another adjacent heat dissipation mechanism.

2. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 1, characterized in that: A radiator is arranged between two adjacent cable cores.

3. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 1, characterized in that: A plurality of baffles are arranged inside the main heat sink between the front guide plate and the rear guide plate. The baffles divide the interior of the main heat sink into a plurality of cavities. Each baffle is perpendicular to the length direction of the cable core and is provided with a plurality of ventilation holes.

4. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 3, characterized in that: The main heat dissipation plate is an arc-shaped plate bent along the circumferential direction of the inner protective layer.

5. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 1, characterized in that: One end of the front guide plate is fixed on the main duct and connected to the side of the front cavity in the main duct away from the partition, and the other end is fixed on one end of the main heat sink and connected to the inside of the main heat sink; one end of the rear guide plate is fixed on the main duct and connected to the side of the rear cavity in the main duct away from the partition, and the other end is fixed on the other end of the main heat sink and connected to the inside of the main heat sink.

6. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 5, characterized in that: A plurality of transverse plates are fixed in a transversely staggered manner in the front guide plate.

7. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 5, characterized in that: The rear guide plate is internally provided with a plurality of channels connecting the main heat sink and the rear cavity of the main duct.

8. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 7, characterized in that: The hole is a straight channel or a serpentine channel.

9. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 1, characterized in that: Each heat dissipation mechanism also includes at least one auxiliary heat dissipation fin; two ends of the auxiliary heat dissipation fin are respectively fixed on the main heat dissipation plate and the main conduit.

10. The high-efficiency heat dissipation cross-linked polyethylene insulated cable according to claim 1, characterized in that: A plurality of heat dissipation fins are evenly distributed on the outer wall of the hose.

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