Submarine cable with heat dissipation function

Abstract

The invention provides a submarine cable with a heat dissipation function. The submarine cable comprises an inner protection layer, a center piece, a plurality of electric unit assemblies, a heat dissipation assembly and a supporting piece. An accommodating cavity and a circulating flow channel are arranged in the inner protective layer; the center piece is located in the containing cavity and provided with a first flow channel, and the first flow channel is used for containing cooling liquid. The multiple electric unit assemblies are located in the containing cavity, each electric unit assembly comprises an electric unit and a wrapping part, the wrapping parts are arranged around the peripheries of the electric units and are provided with second flow channels, and the second flow channels are used for containing cooling liquid and communicate with the first flow channels and the circulating flow channels; the circulating flow channel is used for enabling circulating gas formed by heating cooling liquid in the first flow channel and the second flow channel to enter the circulating flow channel; the heat dissipation assembly is arranged around the periphery of the inner protective layer, is configured to cool the inner protective layer and is used for liquefying circulating gas in the circulating flow channel; the supporting piece is located in the containing cavity and provided with a third flow channel, and the third flow channel communicates with the circulating flow channel and the first flow channel and is used for conveying cooling liquid formed by liquefying the circulating gas to the first flow channel.

Description

Technical Field

[0001] The present application relates to the field of submarine cable technology, and in particular to a submarine cable with heat dissipation function. Background Art

[0002] Traditional three-core submarine cables have poor heat dissipation effects, and heat is easily accumulated in the internal core structure of the submarine cable, affecting the normal operation of the submarine cable. Summary of the Invention

[0003] The present application provides a submarine cable with heat dissipation function to solve the problem of poor heat dissipation effect of submarine cables in the prior art.

[0004] The present application provides a submarine cable with a heat dissipation function, comprising an inner sheath, a center piece, a plurality of electrical unit assemblies, a heat dissipation assembly, and a support member; a receiving cavity is provided in the inner sheath, and a circulation flow channel is provided in the inner sheath; the center piece is located in the receiving cavity, and a first flow channel is defined in the center piece, and the first flow channel is used to receive a coolant; a plurality of electrical unit assemblies are located in the receiving cavity, and the electrical unit assemblies include electrical units and a covering member, the covering member is arranged around the outer periphery of the electrical units, and the covering member is provided with a second flow channel, and the second flow channel is used to receive a coolant, and the second flow channel connects the first flow channel and the circulation flow channel, and is used to allow a circulating gas formed by the heating of the coolant in the first flow channel and the second flow channel to enter the circulation flow channel; the heat dissipation assembly is arranged around the outer periphery of the inner sheath, and the heat dissipation assembly is configured to cool the inner sheath, and is used to liquefy the circulating gas in the circulation flow channel; the support member is located in the receiving cavity, and a third flow channel is defined in the support member, and the third flow channel connects the circulation flow channel and the first flow channel, and is used to transport the coolant formed by the liquefaction of the circulating gas to the first flow channel.

[0005] In one possible embodiment, a plurality of the covering members are arranged around the central member, one side of the covering member is connected to the inner protective layer, and the other side of the covering member is provided with a connecting portion, the connecting portion is connected to the central member, and the connecting portion is provided with an intermediate flow channel, and the intermediate flow channel connects the first flow channel and the second flow channel.

[0006] In a possible embodiment, a first opening is provided at the connection between the covering member and the inner protective layer, the second flow channel is connected to the circulation flow channel through the first opening, and a breathable and water-blocking membrane is provided at the first opening.

[0007] In one possible embodiment, the circulation flow channel includes multiple first flow segments and multiple second flow segments, the second flow segment is provided between any two adjacent first flow segments, the first flow segment is connected to the second flow channel, and a blocking member is provided between the two ends of the first flow segment and the two adjacent second flow segments, and the blocking member is configured to prevent the first flow segment from being connected to the second flow segment.

[0008] In a possible implementation, one end of the third flow channel is connected to the first flow section, and the other end of the third flow channel is connected to the first flow channel.

[0009] In a possible embodiment, the support member is located between two adjacent covering members, one end of the support member is connected to the center member, and the other end of the support member is connected to the inner protective layer. A second opening is provided at the connection between the support member and the inner protective layer, and the third flow channel is connected to the first flow section through the second opening.

[0010] In a possible implementation, a first one-way water-blocking film is provided at the second opening, and the first one-way water-blocking film is configured to only allow the coolant to enter the third flow channel from the first flow section.

[0011] In one possible embodiment, a third opening is provided at the connection between the support member and the center member, the third flow channel is connected to the first flow channel through the third opening, and the third opening is provided with a second one-way water-blocking membrane, and the second one-way water-blocking membrane is configured to only allow the coolant to enter the first flow channel from the third flow channel.

[0012] In a possible embodiment, the submarine cable with heat dissipation function further includes an optical unit, the support member is made of a heat-conductive material and is provided with a wire threading groove, and the wire threading groove is used to accommodate the optical unit; The support member is provided with two third flow channels, the two third flow channels are arranged on both sides of the light unit, and the two third flow channels are respectively connected to the two first flow sections.

[0013] In a possible implementation, the submarine cable with heat dissipation function further includes a filler, and the filler is filled in the second flow section.

[0014] The submarine cable with heat dissipation function of the present application is provided with a first flow channel and a second flow channel to accommodate the coolant. When the submarine cable is working and the internal temperature rises, the coolant will be heated and vaporized to form a circulating gas. When the coolant vaporizes, it will take away the heat, thereby cooling the electrical unit. In addition, after the circulating gas enters the circulating flow channel, the heat dissipation component works to cool the circulating gas, and the circulating gas condenses to form a coolant. After the coolant is cooled by the heat dissipation component, the temperature of the coolant is lower. The coolant then flows through the third flow channel to the first flow channel and the second flow channel, so that the coolant with a lower temperature surrounds the electrical unit and the center piece and dissipates heat efficiently and comprehensively for both, thereby reducing the temperature inside the submarine cable and ensuring the normal operation of the submarine cable. In addition, when the heat dissipation component cools the inner sheath, it can also act on the electrical unit through the inner sheath, thereby also cooling the electrical unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic structural diagram of a submarine cable with heat dissipation function according to an embodiment of the present invention.

[0016] Figure 2 Schematic diagram of the structure of the connection portion of a submarine cable with heat dissipation function in one embodiment of the present application.

[0017] Figure 3 FIG. 1 is a schematic structural diagram of a heat dissipation assembly of a submarine cable with heat dissipation function in one embodiment of the present application.

[0018] Explanation of the main component symbols: 100, submarine cable with heat dissipation function; 1, first opening; 2, second opening; 3, third opening; 10, inner sheath; 11, circulation channel; 111, first flow section; 112, second flow section; 12, receiving chamber; 13, blocking member; 14, filling member; 20, center member; 21, center hole; 22, first flow channel; 30, electrical unit assembly; 31, covering member; 310, second flow channel; 32, electrical unit; 321, conductor; 322, insulation layer; 33, connecting part; 330, intermediate flow channel; 40, supporting member; 41, threading groove; 42, buffer hole; 43, third flow channel; 50, optical unit; 60, heat dissipation assembly; 61, cold end layer; 62, electric cooling main layer; 63, hot end layer; 70, outer sheath.

[0019] The following specific implementation methods will further illustrate this application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0020] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Illustrated in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make this application thorough and complete and to fully convey the scope of this application to those skilled in the art. The same reference numerals represent the same or similar components.

[0021] The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. In addition, when used herein, "includes" and / or "comprising" and / or "having" integers, steps, operations, components and / or components do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0022] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the context of this application, and will not be interpreted as idealized or overly formal meanings.

[0023] The specific implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, this embodiment provides a submarine cable 100 with heat dissipation function, including an inner sheath 10 , a center piece 20 , a plurality of electrical unit assemblies 30 , a heat dissipation assembly 60 , and a support member 40 .

[0025] The inner protective layer 10 is made of an insulating and thermally conductive material. For example, a plastic material with a highly thermally conductive filler (such as boron nitride, aluminum oxide, or graphene) can be added. The inner protective layer 10 is generally a hollow cylindrical structure, and a receiving cavity 12 is defined therein. Furthermore, the inner protective layer 10 is provided with an annular circulation channel 11, which is disposed at intervals around the periphery of the wall of the receiving cavity 12.

[0026] The center piece 20 is located in the receiving cavity 12. The center piece 20 is provided with a first flow channel 22. The first flow channel 22 is used to receive the coolant. The coolant can be a liquid such as water with a boiling point in the range of 70°C to 110°C, so that when the submarine cable is working and the internal temperature is higher than the boiling point of the coolant, the coolant will vaporize. It should be noted that when the three-core submarine cable is working, its internal temperature can reach 120°C or even higher. A plurality of electrical unit assemblies 30 are located in the receiving cavity 12. The electrical unit assembly 30 includes an electrical unit 32 and a covering 31. The covering 31 is arranged around the periphery of the electrical unit 32. The covering 31 is provided with a second flow channel 310. The second flow channel 310 is used to receive the coolant. The second flow channel 310 connects the first flow channel 22 and the circulation flow channel 11, and is used to allow the circulating gas formed by the heating of the coolant in the first flow channel 22 and the second flow channel 310 to enter the circulation flow channel 11. The heat dissipation assembly 60 surrounds the outer periphery of the inner sheath 10 and is configured to cool the inner sheath 10, thereby liquefying the circulating gas within the circulation channel 11. The support member 40 is located within the receiving chamber 12 and defines a third flow channel 43 , which connects the circulation channel 11 and the first flow channel 22 and is used to transport the coolant formed by the liquefied circulating gas to the first flow channel 22 .

[0027] Thus, the submarine cable 100 with heat dissipation function of the present application is provided with a first flow channel 22 and a second flow channel 310 to accommodate coolant. When the internal temperature of the submarine cable rises during operation, the coolant is heated and vaporized to form circulating gas. The vaporized coolant removes heat, thereby cooling the electrical unit 32. Furthermore, after the circulating gas enters the circulating flow channel 11, the heat dissipation component 60 operates to cool the circulating gas, causing the circulating gas to condense and form coolant. After being cooled by the heat dissipation component 60, the coolant is cooled to a lower temperature. The coolant then flows through the third flow channel 43 to the first flow channel 22 and the second flow channel 310, thereby allowing the coolant to surround the electrical unit 32 and the centerpiece 20, effectively and comprehensively dissipating heat from both, thereby reducing the temperature inside the submarine cable and ensuring normal operation of the submarine cable. Furthermore, when the heat dissipation component 60 cools the inner sheath 10, it can also act on the electrical unit 32 through the inner sheath 10, thereby also cooling the electrical unit 32.

[0028] Please combine again Figure 1 and Figure 2 In one embodiment, a plurality of covering members 31 are arranged around the central member 20, one side of the covering member 31 is connected to the inner protective layer 10, and the other side of the covering member 31 is provided with a connecting portion 33, the connecting portion 33 is connected to the central member 20, and the connecting portion 33 is provided with an intermediate flow channel 330, which connects the first flow channel 22 and the second flow channel 310.

[0029] The center piece 20 is made of an insulating and thermally conductive material, which can be the same material as the inner sheath 10. The center piece 20 is generally cylindrical and located at the center of the inner sheath 10, coaxially arranged with the inner sheath 10. A central hole 21 is defined within the center piece 20, extending parallel to the direction of extension of the center piece 20. This design improves the bending performance of the center piece 20. Furthermore, a filling rope can be placed within the center hole 21 to enhance the strength of the center piece 20 while maintaining its bending performance, thereby increasing the stability of the center piece 20 in supporting the inner sheath 10 and the electrical unit 32.

[0030] There are three electrical unit assemblies 30, with the three electrical units 32 arranged at equal intervals around the center piece 20, i.e., the arc center angle between any two adjacent electrical units 32 is 120°. The electrical unit 32 includes a conductor 321 and an insulating layer 322 surrounding the conductor 321. The conductor 321 is made of a conductive material such as copper. In addition, the electrical unit 32 includes other layers necessary to implement the functions of the electrical unit 32, such as a shielding layer and a waterproof layer. The specific structure of the electrical unit 32 can be selected based on actual needs and is not specifically limited in this application.

[0031] The cover 31 is a circular ring structure and is disposed around the outer periphery of the electrical unit 32. The cover 31 is made of an insulating and thermally conductive material, which can be the same material as the inner sheath 10. This protects the electrical unit 32 from pressure while also absorbing and dissipating heat generated by the electrical unit 32 during operation.

[0032] Along the radial direction of the electrical unit 32, the side of the covering 31 away from the connecting portion 33 is connected to the inner wall of the inner protective layer 10. The extension direction of the connecting portion 33 is parallel to the radial direction of the electrical unit 32 to which it corresponds. The connecting portion 33 is made of an insulating and heat-conductive material. One end of the connecting portion 33 is connected to the outer peripheral surface of the covering 31, and the other end of the connecting portion 33 is connected to the outer peripheral surface of the center piece 20, thereby achieving the position fixation of the electrical unit 32 in the accommodating cavity 12. The extension direction of the intermediate flow channel 330 is arranged parallel to the extension direction of the connecting portion 33, and one end of the intermediate flow channel 330 is connected to the first flow channel 22, and the other end of the intermediate flow channel 330 is connected to the second flow channel 310, so that the circulating gas and the coolant can flow from the first flow channel 22 into the intermediate flow channel 330, and then flow from the intermediate flow channel 330 into the second flow channel 310.

[0033] It is worth noting that when the submarine cable is working, the temperature of the electrical unit 32 rises. The heat generated by the electrical unit 32 is transferred to the coolant in the second flow channel 310 through the covering 31, and the heat generated by the electrical unit 32 is also transferred to the center piece 20 through the covering 31. The center piece 20 transfers the received heat to the coolant in the first flow channel 22, so that the coolant is heated and vaporized, and the first flow channel 22, the middle flow channel 330, and the second flow channel 310 are filled with circulating gas, which increases the internal pressure and then the circulating gas is sent to the circulating flow channel 11.

[0034] In some embodiments, the connection portion 33 has a certain degree of elasticity and is configured as an accordion structure, allowing the connection portion 33 to elastically deform along its extension direction. For example, the connection portion 33 may have multiple sections along its extension direction, each of which has a roughly hexagonal cross-sectional shape. When the electrical unit 32 is squeezed by external forces, the connection portion 33 can buffer the pressure exerted on the electrical unit 32, preventing damage to the electrical unit 32 from being subjected to high seawater pressure. Furthermore, the intermediate flow channel 330 provided within the connection portion 33 contains coolant. When the electrical unit 32 is compressed, the deformation of the connection portion 33 itself prevents the connection portion 33 from bending and breaking under pressure.

[0035] Please combine again Figure 1 In one embodiment, the circulation channel 11 includes a plurality of first flow segments 111 and a plurality of second flow segments 112. Along the circumference of the inner protective layer 10, the plurality of first flow segments 111 and the plurality of second flow segments 112 are alternately arranged. That is, any two adjacent first flow segments 111 are spaced apart, and a second flow segment 112 is provided between them.

[0036] The number of first flow segments 111 and second flow segments 112 is the same as the number of electrical units 32, that is, the number of first flow segments 111 and second flow segments 112 is three. The three first flow segments 111 are respectively arranged corresponding to the three electrical units 32, and the three first flow segments 111 are respectively connected to the three second flow channels 310. In addition, a blocking member 13 is provided between the two ends of the first flow segment 111 and the two adjacent second flow segments 112. The blocking member 13 is configured to prevent the first flow segment 111 from connecting to the second flow segment 112, thereby preventing the coolant in the first flow segment 111 from entering the second flow segment 112 and then being unable to flow back to the first flow channel 22 through the third flow channel 43. Along the radial direction of the inner protective layer 10, the two ends of the blocking member 13 are respectively connected to the inner wall of the circulation channel 11 on the side close to the center piece 20 and the inner wall on the side away from the center piece 20. It is understandable that the blocking members 13 may be integrally formed with the inner protective layer 10 , so that the circulation channel 11 is divided into three first flow sections 111 and three second flow sections 112 by the six blocking members 13 .

[0037] In this embodiment, a first opening 1 is provided at the connection between the covering member 31 and the inner protective layer 10 , the second flow channel 310 is connected to the circulation flow channel 11 through the first opening 1 , and a breathable and water-blocking film is provided at the first opening 1 .

[0038] The breathable and water-blocking membrane allows the circulating gas in the second flow channel 310 to enter the circulation channel 11, but blocks the coolant in the second flow channel 310 from entering the circulation channel 11, and vice versa. The breathable and water-blocking membrane can be an expanded polytetrafluoroethylene (ePTFE) membrane, which is expanded and stretched to form a microporous structure. ePTFE membranes are highly hydrophobic, blocking coolant, but highly permeable, reducing the flow resistance of the circulating gas. Furthermore, ePTFE membranes are resistant to high temperatures.

[0039] It is understood that in other embodiments, the breathable and water-blocking membrane may also be a microporous polyurethane (PU) breathable membrane. While achieving breathability and water-blocking properties, it also has good flexibility, making it suitable for applications requiring bending. The choice of breathable and water-blocking membrane can be determined based on actual design requirements and is not inherently limited.

[0040] In this embodiment, the submarine cable 100 with heat dissipation function further includes a filling member 14 , which is filled in the second flow section 112 .

[0041] The filler 14 is made of elastic material and is substantially cylindrical in structure. A plurality of fillers 14 are disposed in each second flow section 112 . The plurality of fillers 14 are closely connected to each other and fill the entire second flow section 112 .

[0042] In this way, when the submarine cable is operating normally and does not require heat dissipation, the first flow section 111 contains gas. When the submarine cable is subjected to seawater pressure, the inner sheath 10 is compressed and bends toward the electrical unit 32. The hollow first flow section 111 buffers the pressure, thereby preventing the electrical unit 32 from being subjected to excessive pressure. Furthermore, the composite structure formed by the filler 14 and the blocking member 13 supports the structure of the inner sheath 10 away from the center member 20, maintaining the roundness of the inner sheath 10. It also prevents cracks or damage in the first flow section 111 caused by the large bending amplitude when the inner sheath 10 bends under pressure.

[0043] Please combine again Figure 1 In one embodiment, the support member 40 is located between two adjacent covering members 31 , one end of the support member 40 is connected to the outer circumference of the center member 20 , and the other end of the support member 40 is connected to the inner circumference of the inner protective layer 10 .

[0044] The support member 40 is made of the same material as the center member 20 and has thermal conductivity. Furthermore, the support member 40 has a generally fan-shaped structure and is spaced apart from two adjacent sheathing members 31. A filler, such as a filler rope or other elastic material, can be placed between the support member 40 and the adjacent sheathing members 31. This improves the cable's overall compressive strength and protects structures such as the electrical unit 32. Furthermore, when low-temperature coolant flows within the third flow channel 43, it cools the filler, ensuring a uniform temperature reduction throughout the interior of the inner sheath 10 and maintaining a suitable operating environment for the electrical unit 32.

[0045] In this embodiment, the submarine cable 100 with heat dissipation function further includes an optical unit 50. The optical unit 50 includes an optical fiber and a loose tube wrapped around the outer periphery of the optical fiber. It is understood that the optical unit 50 may also include other necessary layer structures such as a water-blocking layer and a buffer layer. The specific structure of the optical unit 50 is not limited in this application and can be selected based on actual needs.

[0046] The support member 40 defines a wire groove 41 for accommodating the optical unit 50. This groove allows the optical unit 50 to be positioned by the support member 40, ensuring its stability. Furthermore, the support member 40 wraps around the outer periphery of the optical unit 50, providing pressure protection. The number of optical units 50 can be the same as the number of support members 40, i.e., three optical units 50 are disposed within the wire grooves 41 provided on the three support members 40. The optical unit 50 can serve as a fiber optic structure with various functions, such as a communication fiber or a temperature measurement fiber.

[0047] It is understandable that in other embodiments, the number of the light unit 50 may also be one or two.

[0048] In this embodiment, the support member 40 defines two third flow channels 43, located on either side of the optical unit 50. Each third flow channel 43 connects to the two first flow segments 111. The two third flow channels 43 are located approximately in the region of the support member 40 proximal to the adjacent electrical unit 32, enhancing the cooling effect of the coolant within the third flow channel 43 on the filler. Furthermore, the two third flow channels 43, located on opposite sides of the optical unit 50, simultaneously dissipate heat from both sides of the optical unit 50 through the coolant within the two third flow channels 43, thereby improving the heat dissipation efficiency of the optical unit 50.

[0049] The ends of the two third flow channels 43 close to the center piece 20 are connected to the first flow channel 22, and the ends of the two third flow channels 43 away from the center piece 20 are respectively connected to the two first flow sections 111, so that any first flow section 111 can be connected to the first flow channel 22 through the two third flow channels 43, ensuring that when the submarine cable is in different postures, the coolant condensed in the first flow section 111 can flow from one third flow channel 43 to the first flow channel 22, avoiding excessive coolant accumulation in the first flow section 111.

[0050] It is worth noting that the third flow channel 43 can be designed based on the principle of capillary action, so that the coolant in the third flow channel 43 can more easily overcome its own gravity and enter the first flow channel 22. When the third flow channel 43 is designed based on the principle of capillary action, the cross-sectional size of the third flow channel 43 can be reduced or a gradient cross-sectional size can be constructed.

[0051] In this embodiment, a second opening 2 is provided at the connection between the support member 40 and the inner protective layer 10. The third flow channel 43 communicates with the first flow segment 111 through the second opening 2. A first one-way water-blocking membrane is provided at the second opening 2. The first one-way water-blocking membrane is configured to only allow coolant to enter the third flow channel 43 from the first flow segment 111. Therefore, coolant can only flow from the first flow segment 111 into the third flow channel 43. Coolant that has flowed into the third flow channel 43 cannot flow back into the first flow segment 111 through the second opening 2.

[0052] The first unidirectional water-blocking membrane can be a microporous one-way valve membrane. Its asymmetric microporous structure (such as tapered pores or gradient pore sizes) allows the coolant to pass only in one direction. Specifically, it can be made of a material such as polyurethane (PU). It is understood that the first unidirectional water-blocking membrane can also be a gradient wettability unidirectional moisture-conducting membrane or other membrane structures with unidirectional water-blocking properties.

[0053] In this embodiment, a third opening 3 is provided at the junction of the support member 40 and the center member 20. The third flow channel 43 communicates with the first flow channel 22 through the third opening 3. A second one-way water-blocking membrane is provided at the third opening 3. This membrane is configured to only allow coolant to enter the first flow channel 22 from the third flow channel 43. Coolant flowing into the first flow channel 22 can therefore only flow from the third flow channel 43 into the first flow channel 22. Coolant flowing into the first flow channel 22 cannot flow back into the third flow channel 43 through the third opening 3. The structure and principle of the second one-way water-blocking membrane are identical to those of the first one-way water-blocking membrane and will not be further described here.

[0054] In this embodiment, the support member 40 is provided with a plurality of buffer holes 42. These buffer holes 42 are distributed radially along the inner sheath 10, on the side of the optical unit 50 closest to the inner sheath 10, to enhance the bending performance of the support member 40. Furthermore, since the support member 40 is positioned in correspondence with the second flow section 112, the filler 14 disposed within the second flow section 112 can compensate for the impact of the buffer holes 42 on the compressive strength of the optical unit 50, thereby ensuring that the optical unit 50 has adequate pressure protection.

[0055] Please combine again Figure 1 and Figure 3 In one embodiment, the heat dissipation assembly 60 includes a cold end layer 61, an electric cooling body layer 62, and a hot end layer 63, which are sequentially disposed around the outer periphery of the inner protective layer 10. The electric cooling body layer 62 is made of a silicon-based material or a III-V semiconductor 321 material, and can achieve heat transfer based on the Peltier effect. When the electric cooling body layer 62 is energized, it transfers heat from the cold end layer 61 to the hot end layer 63, thereby cooling the inner protective layer 10, to which it is thermally coupled, through the cold end layer 61. The electric cooling body layer 62 can be connected to a power supply assembly via a conductive wire, so that the power supply assembly can supply power to the electric cooling body layer 62.

[0056] The hot end layer 63 and the cold end layer 61 are both made of heat-conducting materials such as metal to form an electromagnetic shielding structure, thereby improving the electromagnetic shielding capability of the submarine cable.

[0057] It will be appreciated that in other embodiments, the main electric cooling layer 62 may also utilize semiconductor 321 cooling chips. The semiconductor 321 cooling chips are embedded between the hot end layer 63 and the cold end layer 61, with the hot end of the semiconductor 321 cooling chip thermally coupled to the hot end layer 63, and the cold end of the semiconductor 321 cooling chip thermally coupled to the cold end layer 61. The number of semiconductor 321 cooling chips is set to multiple, and the multiple semiconductor 321 cooling chips are sequentially spaced along the extension direction of the cable to improve heat dissipation uniformity.

[0058] In this embodiment, the submarine cable 100 with heat dissipation function further includes an outer sheath 70 , which is wrapped around the outer periphery of the hot end layer 63 and can transfer the heat generated by the hot end layer 63 to the seawater outside the submarine cable through the outer sheath 70 .

[0059] The outer sheath 70 includes a shielding layer, a shielding insulation layer, a copper sheath, an armor layer, an outer sheath, and other layered structures. It is understood that the outer sheath 70 also includes other necessary components such as a fireproof layer and a waterproof layer. The specific structure of the outer sheath 70 is not limited in this application and can be selected based on actual needs.

[0060] In summary, when the temperature inside the inner protective layer 10 is higher than the boiling point of the coolant, the coolant vaporizes to form circulating gas, which then enters the circulating flow channel 11. At this time, the heat dissipation component 60 begins to work, causing the circulating gas to condense to form coolant and lowering the temperature of the coolant. Since the coolant in the first flow channel 22 and the second flow channel 310 becomes circulating gas, the air pressure in both increases, causing the coolant in the first flow section 111 to enter the third flow channel 43, which can dissipate heat to the support member 40 and the optical unit 50 and filler in contact with the support member 40. The cooled coolant then enters the first flow channel 22 through the third flow channel 43, and then enters the second flow channel 310 from the first flow channel 22, thereby dissipating heat to the center member 20 and the electrical unit 32, thereby achieving heat dissipation of the various structures in the inner protective layer 10.

[0061] After heat dissipation is completed, the heat dissipation assembly 60 stops working. Even if some coolant remains in the circulation channel 11 and the third flow channel 43 due to unexpected factors, if the inner sheath temperature of the submarine cable subsequently exceeds the boiling point of the coolant or the electrical unit 32 generates a large amount of heat, causing the coolant in the circulation channel 11 and the third flow channel 43 to vaporize, the circulating gas formed by the vaporization can continue to participate in the heat dissipation cycle.

[0062] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are within the scope of the present application.

Claims

1. A submarine cable with heat dissipation function, characterized in that: include: An inner protective layer, wherein a receiving cavity is provided therein, and the inner protective layer is provided with a circulation flow channel; a center piece located in the receiving cavity, the center piece being provided with a first flow channel for receiving a coolant; a plurality of electrical unit assemblies located within the receiving cavity, the electrical unit assemblies comprising electrical units and a covering member disposed around the periphery of the electrical units, the covering member defining a second flow channel for receiving a coolant, the second flow channel communicating with the first flow channel and the circulating flow channel for allowing circulating gas generated by heating the coolant within the first and second flow channels to enter the circulating flow channel; a heat dissipation assembly disposed around the outer periphery of the inner protective layer, the heat dissipation assembly being configured to cool the inner protective layer so as to liquefy the circulating gas in the circulating flow channel; A support member is located in the receiving cavity, and a third flow channel is opened in the support member. The third flow channel connects the circulation flow channel and the first flow channel, and is used to transport the cooling liquid formed by liquefying the circulating gas into the first flow channel.

2. The submarine cable with heat dissipation function according to claim 1, characterized in that: A plurality of the covering parts are arranged around the central part, one side of the covering part is connected to the inner protective layer, and the other side of the covering part is provided with a connecting portion, the connecting portion is connected to the central part, and the connecting portion is provided with an intermediate flow channel, and the intermediate flow channel connects the first flow channel and the second flow channel.

3. The submarine cable with heat dissipation function according to claim 2, characterized in that: A first opening is provided at the connection between the covering member and the inner protective layer, the second flow channel is communicated with the circulation flow channel through the first opening, and a breathable and water-blocking membrane is provided at the first opening.

4. The submarine cable with heat dissipation function according to claim 2, characterized in that: The circulation flow channel includes multiple first flow segments and multiple second flow segments, and the second flow segment is provided between any two adjacent first flow segments. The first flow segment is connected to the second flow channel, and a blocking member is provided between the two ends of the first flow segment and the two adjacent second flow segments. The blocking member is configured to prevent the first flow segment from connecting to the second flow segment.

5. The submarine cable with heat dissipation function according to claim 4, characterized in that: One end of the third flow channel is connected to the first flow section, and the other end of the third flow channel is connected to the first flow channel.

6. The submarine cable with heat dissipation function according to claim 5, characterized in that: The support member is located between two adjacent covering members, one end of the support member is connected to the center member, and the other end of the support member is connected to the inner protective layer. A second opening is provided at the connection between the support member and the inner protective layer, and the third flow channel is connected to the first flow section through the second opening.

7. The submarine cable with heat dissipation function according to claim 6, characterized in that: A first one-way water-blocking film is provided at the second opening, and the first one-way water-blocking film is configured to only allow the coolant to enter the third flow channel from the first flow section.

8. The submarine cable with heat dissipation function according to claim 6, characterized in that: A third opening is provided at the connection between the support member and the center member, the third flow channel is connected to the first flow channel through the third opening, and the third opening is provided with a second one-way water-blocking membrane, which is configured to only allow the coolant to enter the first flow channel from the third flow channel.

9. The submarine cable with heat dissipation function according to claim 6, characterized in that: The submarine cable with heat dissipation function further includes an optical unit. The support member is made of a heat-conducting material and is provided with a wire threading groove for accommodating the optical unit. The support member is provided with two third flow channels, the two third flow channels are arranged on both sides of the light unit, and the two third flow channels are respectively connected to the two first flow sections.

10. The submarine cable with heat dissipation function according to claim 4, characterized in that: The submarine cable with heat dissipation function further includes a filling piece, and the filling piece is filled in the second flow section.

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