A high-temperature resistant and heat-aging resistant cable

Abstract

This invention relates to the field of cable technology, and in particular to a high-temperature resistant and heat-aging-resistant cable. This high-temperature resistant and heat-aging-resistant cable solves the shortcomings of existing technologies where the cable sheath cracks or breaks in low-temperature environments, resulting in insufficient anti-aging performance under low-temperature conditions and ultimately affecting the overall stable operation of the cable. This invention, by setting a spring rod containing a shape memory alloy spring in the switching box, in conjunction with an airbag cover, vertical plate, and partition, allows for switching of airflow channels at low temperatures. This directs heat from the cable core into the hollow layer to form a heat circulation, which, combined with the rapid heat transfer of the copper plate on the inner wall of the sheath, maintains the sheath at the optimal operating temperature. Furthermore, the invention incorporates heat dissipation components, a ceramic heat insulation coating, and a moisture-proof and drainage structure, taking into account both high and low temperature conditions and high humidity conditions, comprehensively improving the cable's anti-aging performance and ensuring long-term stable operation of the cable in complex environments.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a high-temperature resistant and heat-aging resistant cable. Background Technology

[0002] A cable is an electrical circuit assembly consisting of one or more mutually insulated conductive cores, covered by multiple protective layers such as insulation, shielding, sheathing, and even armor. Its core function is to undertake the long-distance transmission and distribution of electrical energy in power systems, and to be responsible for the stable transmission of various electrical signals in communication and control systems. It is widely used in many fields such as industrial production, building construction, transportation, and aerospace communication. It can effectively overcome spatial distance limitations and ensure the safe, efficient, and stable transmission of electrical energy and signals. It is a key basic carrier for building modern power and communication networks, supporting the normal operation of various electrical equipment and the smooth realization of information exchange in social production and life.

[0003] Chinese patent CN106067342A discloses a high-temperature resistant and anti-aging cable. Its advantages and positive effects are that by changing the traditional cable sheath design from an integrated design to a layered design, each layer has a different function according to its location, thereby improving the overall anti-aging, temperature and climate resistance of the cable. At the same time, the invention has a simple structure and widely available raw materials, making it suitable for large-scale promotion and use.

[0004] The aforementioned and existing related technologies have the following drawbacks: Existing cables all improve the cable's anti-aging and temperature and climate resistance by changing the traditional cable sheath design from an integrated design to a layered design, allowing each layer to have different functions according to its location. However, this solution can only rely on the inherent material properties of each layer of the sheath to achieve passive cold resistance. It cannot specifically address key issues that cable sheaths are prone to in low-temperature environments, such as glass transition, internal stress caused by thermal expansion and contraction, and freezing of molecular chain segments. As a result, the cable's anti-aging performance is insufficient under low-temperature conditions, and long-term use can easily lead to sheath cracking and damage, which in turn affects the overall stable operation of the cable. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology has the disadvantage that the cable sheath will crack and break in the low temperature environment, which makes the cable's anti-aging performance insufficient under low temperature conditions, and ultimately affects the overall stable operation of the cable. To this end, we propose a high temperature resistant and heat aging resistant cable.

[0006] To achieve the above objectives, this application adopts the following technical solution: a high-temperature resistant and heat-aging resistant cable, comprising a cable core: an insulation layer is fixedly installed on the outer surface of the cable core, a support ring is fixedly installed on the outer surface of the insulation layer, a cooling pipe A is fixedly installed on the outer surface of the insulation layer, a sheath is provided on the outer surface of the support ring, and a hollow layer is formed between the cooling pipe A and the sheath; an exhaust pipe is fixedly installed at one end of the cooling pipe A, a cooling pipe B is provided on one side of the cooling pipe A, the cooling pipe A and the cooling pipe B are spirally arranged on the outer surface of the insulation layer, an exhaust pipe is fixedly installed at one end of the cooling pipe B and the cooling pipe A, a switching box is fixedly installed at one end of the exhaust pipe, an exhaust channel is provided inside the switching box, a switching port is opened on the outer surface of the switching box, the switching port is connected to the exhaust channel, an airbag is fixedly installed inside the switching box, a spring rod is fixedly installed inside the airbag, a shape memory alloy spring is provided inside the spring rod, a vertical plate is fixedly installed on one side of the airbag, the vertical plate is slidably connected to the exhaust channel, a partition and a push plate are fixedly installed on one side of the vertical plate, the partition is adapted to the exhaust channel.

[0007] Preferably, the switching box has an inner groove, a plate groove, and a vertical groove inside. The partition is slidably connected to the plate groove, the vertical plate is slidably connected to the vertical groove, the push plate is slidably connected to the inner groove, and one side of the vertical plate is in contact with the switching port.

[0008] Preferably, a left air inlet pipe is fixedly installed at the other end of cooling pipe A, and a right air inlet pipe is fixedly installed at the other end of cooling pipe B. Both the right air inlet pipe and the left air inlet pipe are located on the outer surface of the sheath.

[0009] Preferably, the inner wall of the insulation layer is provided with multiple copper rings, the inner walls of the multiple copper rings are all in contact with the outer surface of the cable core, and multiple sets of heat dissipation fins are fixedly installed on the outer surface of the multiple copper rings, and the heat dissipation fins are all connected to the interior of cooling pipe A and cooling pipe B.

[0010] Preferably, both the right and left air intake pipes are horn-shaped.

[0011] Preferably, a support tube is fixedly installed on the inner wall of the support ring, and the support tube is located inside the hollow layer.

[0012] Preferably, the multiple copper rings are arranged in two groups on the inner wall of the insulating layer, with the spacing between the copper rings in one group being smaller than that in the other group, and the copper rings in one group being closer to the right intake pipe and the left intake pipe.

[0013] Preferably, both cooling tube A and cooling tube B are provided with drain pipes, which are vertically arranged below cooling tube B and cooling tube A.

[0014] Preferably, the outer surface of the sheath has a rectangular groove and a pipe opening, the rectangular groove is adapted to the switching box, the pipe opening is adapted to the left air intake pipe and the right air intake pipe, a copper plate is fixedly installed on the inner wall of the sheath, and a heat insulation coating is provided on the outer surface of the sheath.

[0015] Preferably, the heat-insulating coating is a component made of ceramic heat-insulating reflective coating.

[0016] The technical effects and advantages of this invention are as follows: When the cable operates in a low-temperature environment, the shape memory alloy spring inside the spring rod contracts, and then the airbag covers drive the vertical plate to move to the right. Subsequently, the switching port is revealed and connected to the exhaust channel. At the same time, the partition seals the bottom of the exhaust channel. Then, the heat from the cable core absorbed by cooling pipes A and B enters the hollow layer through the exhaust pipe and the switching port. Then, the copper plate accelerates the transfer of heat to the sheath, maintaining it in the optimal working range. When the cable operates in a normal temperature environment, the spring rod resets, causing the vertical plate to close the switching port. Then, the exhaust channel opens, and then the ambient air enters cooling pipes A and B through the horn-shaped left and right air inlets. Then, the copper ring and heat dissipation fins transfer the heat from the cable core. Subsequently, the airflow carries away the heat and is discharged through the exhaust channel. When the cable operates in a high-temperature environment, the heat insulation coating can reflect solar radiation heat. At the same time, the airflow inside cooling pipes A and B continuously carries away the heat from the cable core, ultimately ensuring the stable operation of the cable. Attached Figure Description

[0017] The disclosure of this 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 this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0018] Figure 1 This is a schematic diagram of the overall cable structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the cable of the present invention; Figure 3 This is a schematic diagram of the cable splitting structure of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of cooling tube A and cooling tube B of the present invention; Figure 5 This is a schematic diagram of the internal structure of the switching box of the present invention; Figure 6 This is a schematic diagram of the split structure of the switching box of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the cable core and insulation layer of the present invention; Figure 8 This is a partial internal structure diagram of cooling tube A and cooling tube B of the present invention; Figure 9 This is a schematic diagram of the sheath material structure of the present invention.

[0019] Legend: 1. Cable core; 2. Insulation layer; 21. Copper ring; 22. Heat dissipation fins; 3. Support ring; 31. Support tube; 4. Sheath; 41. Rectangular groove; 42. Pipe opening; 43. Copper plate; 44. Heat insulation coating; 5. Cooling pipe A; 51. Left air inlet pipe; 52. Drain pipe; 53. Exhaust pipe; 54. Switching box; 541. Inner groove; 542. Exhaust channel; 543. Plate groove; 544. Vertical groove; 545. Switching port; 546. Vertical plate; 5461. Push plate; 5462. Partition plate; 547. Airbag cover; 5471. Spring rod; 55. Cooling pipe B; 56. Right air inlet pipe. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0021] Reference Figure 1As shown, the present invention provides a technical solution: a high-temperature resistant and heat-aging resistant cable, comprising a cable core 1; an insulation layer 2 is fixedly installed on the outer surface of the cable core 1, a support ring 3 is fixedly installed on the outer surface of the insulation layer 2, a cooling pipe A5 is fixedly installed on the outer surface of the insulation layer 2, a sheath 4 is provided on the outer surface of the support ring 3, and a hollow layer is formed between the cooling pipe A5 and the sheath 4; an exhaust pipe 53 is fixedly installed at one end of the cooling pipe A5, and a cooling pipe B55 is provided on one side of the cooling pipe A5; the cooling pipe A5 and the cooling pipe B55 are spirally arranged on the outer surface of the insulation layer 2, and the cooling pipe B55 and the cooling pipe A5... An exhaust pipe 53 is fixedly installed at one end, and a switching box 54 is fixedly installed at the other end of the exhaust pipe 53. An exhaust channel 542 is provided inside the switching box 54, and a switching port 545 is opened on the outer surface of the switching box 54, connecting the switching port 545 to the exhaust channel 542. An airbag cover 547 is fixedly installed inside the switching box 54, and a spring rod 5471 is fixedly installed inside the airbag cover 547. A shape memory alloy spring is provided inside the spring rod 5471. A vertical plate 546 is fixedly installed on one side of the airbag cover 547, and the vertical plate 546 is slidably connected to the exhaust channel 542. A partition plate 5462 and a push plate 5461 are fixedly installed on the side. The partition plate 5462 is adapted to the exhaust channel 542. When the ambient temperature around the cable decreases, the shape memory alloy spring inside the spring rod 5471 will contract, causing the airbag cover 547 to move to the right along with the vertical plate 546. As the vertical plate 546 moves, the switching port 545 will be exposed, connecting the switching port 545 to the exhaust channel 542. At this time, the partition plate 5462 will seal the bottom of the exhaust channel 542. When the exhaust channel 542 is sealed, the cooling pipe A5 and the cooling pipe B55... The heat absorbed by the internal core 1 enters the hollow layer formed between the cooling pipe A5 and the sheath 4 through the exhaust pipe 53 and the switching port 545. This heat forms a stable thermal cycle inside the hollow layer, continuously and evenly heating the sheath 4. This heating can keep the temperature of the sheath 4 within the optimal working range of the material, effectively preventing the sheath 4 from becoming brittle due to glass transition, generating internal stress due to thermal expansion and contraction, and accelerating aging due to freezing of molecular chain segments under low temperature conditions. This significantly improves the anti-aging performance of the cable and ultimately ensures the overall stable operation of the cable.

[0022] Reference Figure 1-9As shown in this embodiment: the switching box 54 has an inner groove 541, a plate groove 543, and a vertical groove 544. The partition plate 5462 is slidably connected to the plate groove 543, the vertical plate 546 is slidably connected to the vertical groove 544, and the push plate 5461 is slidably connected to the inner groove 541. One side of the vertical plate 546 is in contact with the switching port 545. When the weather temperature drops, in order to prevent the low temperature from damaging the sheath 4 and thus accelerating aging, the partition plate 5462 will close the exhaust channel 542 under the contraction of the airbag cover 547, so that the switching port 545 is connected to the exhaust channel 542, and the heat emitted by the cable itself will heat the sheath 4. When the temperature is normal, the vertical plate 546 will close the switching port 545 again, and the exhaust channel 542 will open. When the temperature is high, the airbag cover 547 will stretch to its limit, and the vertical plate 546 will still close the switching port 545, and the exhaust channel 542 will remain open, continuously dissipating heat from the cable core 1.

[0023] A left air inlet pipe 51 is fixedly installed at the other end of the cooling pipe A5, and a right air inlet pipe 56 is fixedly installed at the other end of the cooling pipe B55. Both the right air inlet pipe 56 and the left air inlet pipe 51 are located on the outer surface of the sheath 4. Ambient air can be introduced into the cooling pipes A5 and B55 through the left air inlet pipe 51 and the right air inlet pipe 56 to dissipate heat from the cable core 1, thereby allowing the cable core 1 to be in the optimal working range and thus improving the high temperature resistance of the cable.

[0024] Multiple copper rings 21 are provided on the inner wall of the insulation layer 2. The inner walls of the multiple copper rings 21 are all in contact with the outer surface of the cable core 1. Multiple sets of heat dissipation fins 22 are fixedly installed on the outer surface of the multiple copper rings 21. The heat dissipation fins 22 are all connected to the inside of the cooling pipe A5 and the cooling pipe B55. The heat inside the cable core 1 can be transferred to the surface of the heat dissipation fins 22 through the copper rings 21. Since one end of the heat dissipation fin 22 is located inside the cooling pipe A5 and the cooling pipe B55, the air inside the cooling pipe A5 and the cooling pipe B55 will carry away the heat on the surface of the heat dissipation fins 22. This heat will be completely discharged through the switching box 54.

[0025] Both the right air intake pipe 56 and the left air intake pipe 51 are horn-shaped. The horn shape allows the airflow from the environment to enter the cooling pipe A5, thus accelerating the airflow and improving the heat dissipation efficiency.

[0026] A support tube 31 is fixedly installed on the inner wall of the support ring 3. The support tube 31 is set inside the hollow layer. The setting of the support tube 31 can ensure the overall toughness of the cable and also form a hollow layer between the cooling tube A5 and the sheath 4, so that the heat can enter and flow out in the future.

[0027] Multiple copper rings 21 are arranged in two groups on the inner wall of the insulation layer 2. The spacing between the copper rings 21 in one group is smaller than that in the other group. One group of copper rings 21 is located near the right air inlet pipe 56 and the left air inlet pipe 51. Since one group of copper rings 21 has four rings and the other group has twenty rings, when the ambient air humidity is high, the moisture absorbed by the right air inlet pipe 56 and the left air inlet pipe 51 will reach the four copper rings 21 through the cooling pipes A5 and B55. Because the spacing between the copper rings 21 at this location is smaller than that in the other group, the heat transfer speed of the copper rings 21 near the right air inlet pipe 56 and the left air inlet pipe 51 is faster than that of the copper rings 21 with larger spacing. When the moisture passes through this location, it will be evaporated by the heat, preventing the moisture from damaging the cable.

[0028] Both cooling tube A5 and cooling tube B55 are equipped with a drain pipe 52. The drain pipe 52 is vertically installed below cooling tube B55 and cooling tube A5. When the moisture is evaporated by heat, water droplets will be generated at this point. Due to gravity, the water droplets will be located below the tube wall of cooling tube A5 and cooling tube B55. At this time, the water droplets will be discharged into the cable through the drain pipe 52, thereby further improving the effect of preventing moisture from damaging the cable.

[0029] The outer surface of the sheath 4 has a rectangular groove 41 and a pipe opening 42. The rectangular groove 41 is adapted to the switching box 54, and the pipe opening 42 is adapted to the left air inlet pipe 51 and the right air inlet pipe 56. A copper plate 43 is fixedly installed on the inner wall of the sheath 4, and a heat insulation coating 44 is provided on the outer surface of the sheath 4. The copper plate 43 can accelerate the transfer of heat inside the hollow layer to the sheath 4, so that the sheath 4 can always maintain the optimal working range in the low temperature environment. The heat insulation coating 44 is provided so that when the ambient temperature of the sheath 4 is high, the heat insulation coating 44 can reduce the temperature transfer to the sheath 4 through its own characteristics, thereby improving the overall high temperature resistance of the cable.

[0030] The heat insulation coating 44 is a component made of ceramic heat-insulating reflective coating. The ceramic heat-insulating reflective coating can reflect solar radiation heat, effectively reduce the working temperature of the cable surface, and prevent the sheath 4 from softening and deforming due to overheating. In addition, the ceramic heat-insulating reflective coating can also block the degradation effect of ultraviolet rays on the sheath 4, prevent molecular chain breakage and surface powdering, thereby improving the service life of the cable.

[0031] Working principle: When the cable is operating in a low-temperature environment, the shape memory alloy spring inside the spring rod 5471 first contracts. Then, the airbag cover 547 drives the vertical plate 546 to slide to the right along the vertical groove 544. Subsequently, the vertical plate 546 no longer blocks the switching port 545, connecting it with the exhaust channel 542. At the same time, the partition plate 5462 on one side of the vertical plate 546 moves along the plate groove 543 and seals the bottom of the exhaust channel 542. Then, the heat absorbed by the cable core 1 inside the cooling pipes A5 and B55 enters the switching box 54 through the exhaust pipe 53, and then flows into the hollow layer between the cooling pipe A5 and the sheath 4 through the switching port 545. Then, a stable thermal cycle is formed in the hollow layer. The copper plate 43 on the inner wall of the sheath 4 accelerates the transfer of heat to the sheath 4, keeping the sheath 4 in the optimal operating temperature range. When the cable is operating in a normal temperature environment, the shape memory alloy spring resets, driving the vertical plate 546 to move to the left. The vertical plate 546 re-closes the switching port 545 and opens the exhaust channel 542. Then, the ambient air enters the cooling pipe A5 and cooling pipe B55 through the horn-shaped left air inlet pipe 51 and right air inlet pipe 56. At the same time, the copper ring 21 on the inner wall of the insulation layer 2 transfers the heat of the cable core 1 to the heat dissipation fins 22. The airflow carries away the heat on the surface of the heat dissipation fins 22 and is discharged through the exhaust channel 542. When the cable is working in a high-temperature environment, the heat insulation coating 44 made of ceramic heat-insulating and reflective coating on the outer surface of the sheath 4 reflects the heat of solar radiation. At the same time, the airflow continues to dissipate heat for the cable core 1. When the ambient air humidity is high, the moisture enters the cooling pipe A5 and cooling pipe B55 with the airflow and flows to the four closely spaced copper rings 21. The copper rings 21 at this location have a fast heat transfer speed and evaporate the moisture. The water droplets generated are collected at the bottom of the cooling pipe due to gravity and discharged through the drain pipe 52, ultimately ensuring the stable operation of the cable.

[0032] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A high-temperature resistant and heat-aging resistant cable, characterized in that, The cable core includes an insulation layer fixedly installed on its outer surface, a support ring fixedly installed on the outer surface of the insulation layer, a cooling tube A fixedly installed on the outer surface of the insulation layer, a sheath provided on the outer surface of the support ring, and a perforated layer formed between the cooling tube A and the sheath. An exhaust pipe is fixedly installed at one end of the cooling tube A, and a cooling tube B is provided on one side of the cooling tube A. The cooling tubes A and B are spirally arranged on the outer surface of the insulation layer. An exhaust pipe is fixedly installed at one end of the cooling tube B and the cooling tube A. A switching box is fixedly installed at one end of the exhaust pipe, and an exhaust channel is provided inside the switching box. The outer surface has a switching port that is connected to the exhaust channel. An airbag cover is fixedly installed inside the switching box. A spring rod is fixedly installed inside the airbag cover. A shape memory alloy spring is installed inside the spring rod. A vertical plate is fixedly installed on one side of the airbag cover. The vertical plate is slidably connected to the exhaust channel. A partition and a push plate are fixedly installed on one side of the vertical plate. The partition is adapted to the exhaust channel. The switching box has an inner groove, a plate groove, and a vertical groove. The partition is slidably connected to the plate groove, the vertical plate is slidably connected to the vertical groove, and the push plate is slidably connected to the inner groove. One side of the vertical plate is in contact with the switching port.

2. The high-temperature resistant and heat-aging resistant cable according to claim 1, characterized in that: The cooling tube A is fixedly installed with a left air inlet pipe at the other end, and the cooling tube B is fixedly installed with a right air inlet pipe at the other end. Both the right air inlet pipe and the left air inlet pipe are located on the outer surface of the sheath.

3. The high-temperature resistant and heat-aging resistant cable according to claim 2, characterized in that: The inner wall of the insulation layer is provided with multiple copper rings, the inner walls of the multiple copper rings are all in contact with the outer surface of the cable core, and multiple sets of heat dissipation fins are fixedly installed on the outer surface of the multiple copper rings. The heat dissipation fins are all connected to the interior of cooling pipe A and cooling pipe B.

4. The high-temperature resistant and heat-aging resistant cable according to claim 3, characterized in that: Both the right and left air intake pipes are horn-shaped.

5. The high-temperature resistant and heat-aging resistant cable according to claim 1, characterized in that: A support tube is fixedly installed on the inner wall of the support ring, and the support tube is located inside the hollow layer.

6. The high-temperature resistant and heat-aging resistant cable according to claim 4, characterized in that: The copper rings are arranged in two groups on the inner wall of the insulating layer. The spacing between the copper rings in one group is smaller than that in the other group, and one group of copper rings is closer to the right intake pipe and the left intake pipe.

7. The high-temperature resistant and heat-aging resistant cable according to claim 6, characterized in that: Both cooling tube A and cooling tube B are equipped with drain pipes, which are vertically positioned below cooling tube B and cooling tube A.

8. The high-temperature resistant and heat-aging resistant cable according to claim 5, characterized in that: The outer surface of the sheath has a rectangular groove and a pipe opening. The rectangular groove is adapted to the switching box, and the pipe opening is adapted to the left air intake pipe and the right air intake pipe. A copper plate is fixedly installed on the inner wall of the sheath, and a heat insulation coating is provided on the outer surface of the sheath.

9. The high-temperature resistant and heat-aging resistant cable according to claim 8, characterized in that: The heat-insulating coating is a component made of ceramic heat-insulating reflective coating.

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