Efficient heat dissipation type cross-linked polyethylene insulated cable

Abstract

The invention discloses an efficient heat dissipation type crosslinked polyethylene insulated cable, which comprises a cable core, an inner protective layer, a metal shielding layer, an outer protective layer, a heat conduction filling layer and heat dissipation mechanisms, and is characterized in that two adjacent heat dissipation mechanisms are connected through a hose; the heat dissipation mechanism comprises a main guide pipe, a partition plate, an air inlet pipe, an air outlet pipe and a radiator. The main conduit is arranged in the inner protective layer; the partition plate divides the interior of the main guide pipe into a front cavity and a rear cavity. The air inlet pipe is sleeved with the front cavity of the main guide pipe. The air outlet pipe is sleeved with the rear cavity of the main guide pipe. The plurality of radiators are arranged between the cable cores at the periphery of the main conduit; the radiator comprises a main radiating plate, a front flow guide plate and a rear flow guide plate which are all of a hollow structure. According to the cross-linked polyethylene insulated cable, the heat dissipation mechanism is arranged in the cross-linked polyethylene insulated cable, heat is efficiently and rapidly conducted to the outer edge of the cable from the middle of the cable under the cooperation of wind, rapid heat dissipation is conducted through the heat dissipation face, far larger than the middle of the cable, of the main heat dissipation plate, the heat dissipation speed is high, and the heat dissipation efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field, and in particular relates to a high-efficiency heat dissipation type cross-linked polyethylene insulated cable. Background Art

[0002] Cross-linked polyethylene insulated cables are mainly used in power distribution networks or industrial devices with rated voltages of 0.6 / 1kV and below. They are a common type of cable in power transmission. During power transmission, cables will generate a lot of heat. For cross-linked polyethylene insulated cables, especially multi-core cross-linked polyethylene insulated cables, the heat generated by power transmission will continue to accumulate in the center of the cable and it is difficult to dissipate heat quickly, which will cause the temperature of the cable center to continue to rise, soften the cable insulation layer and protective layer, and reduce the service life of the cable. When the temperature of the cable center exceeds the ignition point of the insulation layer and protective layer, it will also cause the cable to burn, causing serious fire accidents. Summary of the invention

[0003] In order to solve the above problems, the object of the present invention is to provide a high-efficiency 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: The beneficial effects of the present invention are as follows: A high-efficiency heat-dissipating 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, a heat-conducting filling layer being filled between the cable core and the inner protective layer, and a plurality of heat-dissipating mechanisms being arranged inside the inner protective layer and wrapped inside the heat-conducting filling layer, wherein two adjacent heat-dissipating mechanisms are connected by a hose; the heat-dissipating mechanism comprises a main duct, a partition, an air inlet pipe, an air outlet pipe and a radiator; the main duct is arranged at the center inside the inner protective layer along the length direction of the cable core, and all the cable cores are arranged outside the main duct; 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 duct, with one end arranged close to the partition and the other end The radiator is a heat dissipation device which is configured to dissipate heat from one end of the radiator to the other end of the radiator. The radiator is configured to dissipate heat from one end of the radiator to the other end of the radiator. The radiator is configured to dissipate heat from one end of the radiator to the other end of the radiator.

[0005] The present invention arranges a heat dissipation mechanism in the cross-linked polyethylene insulated cable, and conducts heat efficiently and quickly from the middle of the cable to the outer edge of the cable with the cooperation of wind, and uses the main heat dissipation plate that is much larger than the heat dissipation surface of the middle of the cable to quickly dissipate heat, thereby improving the heat dissipation speed of the cable and increasing the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The structure of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0007] Figure 1 This is a cross-sectional structural diagram along the axial direction of the high-efficiency heat dissipation cross-linked polyethylene insulated cable of the present invention.

[0008] Figure 2 The invention provides a high-efficiency heat dissipation type cross-linked polyethylene insulated cable along the Figure 1 Cross-sectional view along the AA direction.

[0009] Figure 3 It is a structural schematic diagram of the heat dissipation mechanism in the high-efficiency heat dissipation cross-linked polyethylene insulated cable of the present invention.

[0010] As shown in the figure: 1-cable core, 2-thermal conductive 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-inlet pipe, 603-radiator, 6031-front guide plate, 60311-cross plate, 6032-thermal conductive rod, 6033-main heat dissipation plate, 60331-baffle, 6034-rear guide plate, 604-partition, 605-auxiliary heat sink, 606-outlet pipe, 7-hose, 8-heat dissipation fins. DETAILED DESCRIPTION

[0011] The following is an explanation of the implementation of the present invention by specific specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0013] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. It should be noted that the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. Example 1

[0014] like Figure 1 and Figure 2 As shown, this embodiment provides a high-efficiency heat dissipation cross-linked polyethylene insulated cable, including a cable core 1, a thermal conductive 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.

[0015] Among them, the cable core 1, the thermal conductive 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 cores are 1 and are 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 formed by twisting a plurality of metal wires, 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 in 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, the copper shielding layer 4 and the outer protective layer 5 are sequentially wrapped outside the inner protective layer 3. A thermal conductive filling layer 2 is also filled between the cable core 1 and the inner protective layer 3, and the thermal conductive filling layer 2 is made of non-metallic thermal conductive materials (such as polystyrene, polypropylene, etc.).

[0016] There are multiple heat dissipation mechanisms 6 arranged along the length direction of the cable core 1 . The heat dissipation mechanisms 6 are arranged inside the inner protective layer 3 and wrapped in the thermal conductive filling layer 2 . Two adjacent heat dissipation mechanisms 6 are connected via a hose 7 .

[0017] like Figure 1-3 As shown, each heat dissipation mechanism 6 includes a main duct 601 , a partition 604 , an air inlet pipe 602 , an air outlet pipe 606 and a radiator 603 .

[0018] The main conduit 601 is a cylindrical hollow tube with closed ends. The main conduit 601 is arranged in the center of the inner protective layer 3 along the length direction of the cable core 1, and the four cable cores 1 are evenly arranged on the periphery of the main conduit 601.

[0019] The partition 604 is fixed in the middle of the main duct 601 and divides the interior of the main duct 601 into a front cavity 6011 and a rear cavity 6012 .

[0020] The air inlet pipe 602 is sleeved in the front cavity 6011 of the main duct 601, and its two ends are open. One end of the air inlet pipe 602 is set close to the partition 604 (not in contact with the partition 604 and with a gap), and the other end extends to the outside of the main duct 601 (its outer wall is fixedly connected to the end of the main duct 601).

[0021] The air outlet pipe 606 is sleeved in the rear cavity 6012 of the main duct 601, with both ends open. One end is arranged close to the partition 604 (not in contact with the partition 604 and with 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).

[0022] There are four radiators 603 disposed between the cable cores 1 outside the main duct 601; one radiator 603 is disposed between two adjacent cable cores 1. Each radiator 603 includes a main heat dissipation plate 6033, a front guide plate 6031 and a rear guide plate 6034.

[0023] The main heat sink 6033 is an arc-shaped plate that is curved along the circumferential direction of the inner protective layer 3, and is hollow inside. The main heat sink 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 sink 6033 is much larger than the width of the front guide plate 6031 and the rear guide plate 6034, and its arc length along the circumferential direction of the inner protective layer 3 is about one eighth of the arc length of the inner wall of the inner protective layer 3. It has a wide heat dissipation surface and is close to the outside of the cable, and the heat dissipation speed is fast.

[0024] The front guide plate 6031 is a rectangular hollow plate body vertically arranged between the main duct 601 and the main heat sink 6033, close to the side of the front cavity 6011 of the main duct 601, and serves as a heat and flow conduction channel. One end of the front guide plate 6031 is fixed on the main duct 601 and connected with the side of the front cavity 6011 in the main duct 601 away from the partition 604 through a preset hole on the main duct 601, and the other end of the front guide plate 6031 is fixed on one end of the main heat sink 6033 and connected with the inside of the main heat sink 6033 through a preset hole on the main heat sink 6033.

[0025] The rear guide plate 6034 is a rectangular hollow plate body vertically arranged between the main duct 601 and the main heat sink 6033, close to the side of the rear cavity 6012 of the main duct 601, and serves as a heat and flow conduction channel. One end of the rear guide plate 6034 is fixed on the main duct 601 and connected with the side of the rear cavity 6012 in the main duct 601 away from the partition through a preset hole on the main duct 601, and the other end of the rear guide plate 6034 is fixed on the other end of the main heat sink 6033 and connected with the inside of the main heat sink 6033 through a preset hole on the main heat sink 6033.

[0026] The two ends of the hose 7 are connected to the heat dissipation mechanism 6 respectively, one end of the hose 7 is connected to the air inlet pipe 602 of one adjacent heat dissipation mechanism 6, and the other end is connected to the air outlet pipe 606 of another adjacent heat dissipation mechanism 6. The existence of the hose 7 can ensure that the cable has a certain curvature.

[0027] Under the action of the fan or air pump, the air flow is blown from the hose 7 or the air inlet pipe 602 at the end of the cable into the air flow channel formed by the hose 7 and the heat dissipation mechanism 6, and finally flows out from the hose 7 or the air inlet pipe 602 at the other end of the cable, while taking away a large amount of heat inside the cable.

[0028] Working principle: The heat dissipation mechanism 6 has three heat dissipation paths: Heat dissipation path one: the main duct 601 absorbs the heat from the center of the cable, and the heat is transferred radially outward from the main duct 601. In addition to being transferred outward at a low speed along the thermal conductive filling layer 2, the main transfer path is to be transferred to the main heat sink 6033 at a faster speed along the front guide plate 6031 and the rear guide plate 6034, and the large heat dissipation surface of the main heat sink 6033 is used to quickly dissipate heat.

[0029] Heat dissipation path two: the cold air flow that has absorbed the heat from the inner wall of the hose 7 and the heat dissipation mechanism 6 is blown into the main duct 601 from the air inlet duct 602, flows along the annular channel formed between the main duct 601 and the air inlet duct 602, further absorbs the internal heat of the main duct 601 (exchanges heat with the inner wall of the main duct 601, and the main duct 601 absorbs the heat from the center of the cable), and then enters the front guide plate 6031 to exchange heat with the inner wall of the front guide plate 6031, absorbs the heat from the front guide plate 6031, and the air flow temperature further rises, and then flows outward into the main heat dissipation plate 6033, flows from one end of the main heat dissipation plate 6033 to the other end of the main heat dissipation plate 6033, and the main heat dissipation plate 6033 is at the outer edge of the cable, and its temperature is much lower than that of the air entering it. The air flow temperature is high and has a large heat dissipation surface, which exchanges heat with the air flow entering it. The temperature of the main heat sink 6033 rises (and at the same time further conducts heat outward for cooling), while the air flow temperature decreases. The air flow that has completed the heat exchange enters the rear guide plate 6034, exchanges heat with the inner wall of the rear guide plate 6034, and its temperature rises. Then it enters the main duct 601, flows along the annular channel formed between the main duct 601 and the air outlet duct 606, further absorbs the internal heat of the main duct 601 (exchanges heat with the inner wall of the main duct 601, and the main duct 601 absorbs the heat from the center of the cable), then enters the hose 7, absorbs 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.

[0030] Heat dissipation path three: The heat in the center and vicinity of the cable is transferred to the inner wall of the front guide plate 6031 through the outer wall of the front guide plate 6031 and then to the airflow. At the same time, the heat in the center and vicinity of the cable is also transferred to the inner wall of the rear guide plate 6034 through the inner wall and outer wall of the rear guide plate 6034 and then to the airflow. Finally, the airflow becomes a hot airflow and dissipates the heat outside the cable (the airflow flowing inside the front guide plate 6031 and the rear guide plate 6034 will take away the heat of the inner walls of the front guide plate 6031 and the rear guide plate 6034, forming a temperature difference between their inside and outside. After that, the heat of the outer walls of the front guide plate 6031 and the rear guide plate 6034 will automatically flow toward the inside of the front guide plate 6031 and the rear guide plate 6034, forming a temperature difference between their outer walls and the center and vicinity of the cable, so that the heat in the center and vicinity of the cable is automatically transferred to the outer walls of the front guide plate 6031 and the outer walls of the rear guide plate 6034).

[0031] Through the above three main heat dissipation paths, the heat in the cable center and its vicinity is efficiently dissipated, protecting the cable and ensuring the life of the cable. Example 2

[0032] In order to further improve the heat exchange efficiency, this embodiment adds the following structure on the basis of the first embodiment: a plurality of baffles 60331 are provided inside the main heat sink 6033 between the front guide plate 6031 and the rear guide plate 6034 to expand the heat exchange area. The baffles 60331 divide the inside of the main heat sink 6033 into a plurality of cavities. Each baffle 60331 is perpendicular to the length direction of the cable core 1. A plurality of ventilation holes (with a diameter of 2-5 mm) are provided on each baffle 60331. After the airflow is blocked by the baffle 60331 and blown into another cavity through the ventilation holes, the temperature of the airflow decreases due to heat exchange with the previous baffle 60331. After passing through all the baffles 60331 in sequence, the temperature drops significantly, and the heat exchange is completed. A plurality of horizontal plates 60311 are fixed in a transversely staggered manner inside the front guide plate 6031, thereby forming a serpentine channel in the front guide plate 6031, thereby improving the heat exchange surface. The rear guide plate is provided with a plurality of channels connecting the main heat sink and the rear cavity of the main duct. The channels are straight or serpentine, so that the airflow that has completed heat exchange and cooling at the main heat sink 6033 can exchange heat with the rear guide plate 6034 and its surroundings again to reduce the temperature in the center of the cable and its vicinity. At the same time, a plurality of heat-conducting rods 6032 are provided on the outside of the front guide plate and the rear guide plate to increase the heat exchange area. A plurality of heat-dissipating 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 in the center of the cable. Example 3

[0033] In order to further achieve heat exchange and efficiently transfer the heat of the cable center and the main conduit 601 to the main heat sink 6033 for heat dissipation, this embodiment adds the following structure on the basis of embodiment 1 or embodiment 2.

[0034] Each heat dissipation mechanism 6 further includes at least one auxiliary heat sink 605 ; two ends of the auxiliary heat sink 605 are respectively fixed on the main heat sink plate 6033 and the main conduit 601 .

[0035] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.

[0036] It should be noted that the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0037] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, 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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