525KV submarine cable with high voltage resistance

Abstract

The invention discloses a 525KV submarine cable with strong pressure resistance, which comprises a plurality of inner wires, the inner wires are provided with a protective support assembly, the protective support assembly comprises a filling layer, the plurality of inner wires are wrapped in the filling layer, a plurality of functional grooves are annularly distributed on the outer side of the filling layer, and a carbon fiber cloth layer is adhered to the outer side of the filling layer. A heat-conducting silica gel layer is adhered to the outer side of the carbon fiber cloth layer, a heat-conducting copper bar wraps the outer side of the heat-conducting silica gel layer, spiral steel bars evenly wrap the outer side of the heat-conducting silica gel layer, spiral aluminum bars wrap the positions, between the spiral steel bars, of the outer side of the heat-conducting silica gel layer, and an outer insulating layer wraps the outer sides of the spiral steel bars and the spiral aluminum bars. The spiral steel bars in the protection supporting assembly provide the interior and are matched with the protection ring on the outer side of the outer protection assembly, the compression resistance and impact resistance of the submarine cable are higher, and when the protection supporting assembly transmits heat to the outer insulation layer, the protection ring increases the heat exchange area through the water permeable holes and the arc-shaped spring pieces, so that heat dissipation is accelerated.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cables, in particular to a 525KV submarine cable with strong pressure resistance. BACKGROUND

[0002] The submarine cable has the advantages of large-capacity information transmission capacity, long-distance transmission, strong anti-interference, good confidentiality and low cost, and has become the core facility of global communication. According to statistical data, more than 95% of global intercontinental communication relies on submarine cables for data transmission. Today, most of the global email, financial transactions, video conferences and video calls are completed through submarine cable networks. However, the submarine cables on the market currently face the challenges of complex and high-pressure submarine environments when laid on the seabed. There are strong currents, seabed topography and various natural forces in the submarine environment, which makes the cable prone to severe impact or friction during laying and use, thereby causing damage to the external structure of the cable and even possibly leading to functional failure of the cable. In addition, the protective layer of the submarine cable is often thick, which provides physical protection, but at the same time, the heat inside the cable is difficult to dissipate effectively. Due to the lack of sufficient heat dissipation channels, the heat will continue to accumulate during long-term use of the cable, causing the temperature of the cable to rise. Overheating can damage the conductive layer and protective layer inside the cable, thereby affecting the transmission performance of the cable, and even possibly causing the aging, cracking or burning of the internal materials of the cable. Therefore, how to reduce the impact damage of the cable in the submarine environment, improve the heat dissipation efficiency and enhance the long-term stability of the cable has become a technical problem in the design and use of the submarine cable. SUMMARY

[0003] The application provides a 525KV submarine cable with strong pressure resistance, which can effectively solve the problems of the cable being easily damaged by impact and the internal heat of the cable being difficult to dissipate due to the over-thickness of the protective layer of the cable, and the protective layer being easily damaged by overheating due to heat accumulation.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme: The utility model provides a kind of 525KV submarine cable of strong pressure performance, including several inner wires, the inner wire is equipped with protective support component, the protective support component includes filling layer, several the inner wire is wrapped in filling layer inside, several functional grooves are arranged around the outside of filling layer, the functional groove is staggered with inner wire, carbon fiber cloth layer is bonded on the outside of filling layer, the carbon fiber cloth layer covers the groove wall of functional groove, heat-conducting silica gel layer is bonded on the outside of carbon fiber cloth layer, heat-conducting copper strip is wrapped on the outside of heat-conducting silica gel layer, spiral steel strip is evenly wrapped on the outside of heat-conducting silica gel layer, spiral aluminum strip is wrapped between spiral steel strip and the outside of spiral aluminum strip, the outside of spiral steel strip and spiral aluminum strip is wrapped with outer insulation layer.

[0005] Further, the functional groove is inlaid with a data line and an expansion rubber strip inside, the expansion rubber strip is located outside the data line, and a steel wire strip is installed through the middle of the expansion rubber strip.

[0006] Further, the spiral steel strip and the spiral aluminum strip are both spiral, and the spiral steel strip and the spiral aluminum strip are closely attached, and the diameters of the spiral steel strip and the spiral aluminum strip are equal.

[0007] Further, the heat-conducting silica gel layer and the expansion rubber strip are provided with an embedded groove corresponding to the heat-conducting copper strip outside the heat-conducting copper strip, the embedded groove is used to be buckled with the heat-conducting copper strip, and the heat-conducting silica gel layer, the expansion rubber strip and the heat-conducting copper strip are all located on the same curved surface.

[0008] Further, a plurality of heat-conducting strips are installed through the filling layer, the heat-conducting strips are located outside the inner wires, one side of the heat-conducting strips contacts the outside of the inner wires, and the other side is close to the outside of the filling layer.

[0009] Further, the width of the functional groove close to one end of the center of the filling layer is smaller than the width of the functional groove close to the other end of the outside of the filling layer, and the other end of the functional groove close to the outside of the filling layer is chamfered.

[0010] Further, an outer protective component is installed outside the outer insulation layer, the outer protective component includes a protective ring, a plurality of protective rings are spaced apart and sleeved on the outer insulation layer in the axial direction, a protective sleeve is sleeved on the outer insulation layer between adjacent protective rings, and butt pipes are uniformly welded on opposite sides of the protective ring, and one end of the two butt pipes on the same side is respectively slidably sleeved on the two ends of a middle connecting plate.

[0011] Further, a plurality of support blocks and arc-shaped spring sheets are arranged around the outside of the protective ring, the support blocks and the arc-shaped spring sheets are staggered, and water-permeable holes are formed in the support blocks in the axial direction.

[0012] Further, an expansion groove is formed in the inside of the protective sleeve, and an expansion rubber ring is bonded in the expansion groove.

[0013] Furthermore, the end of the support block away from the protective ring is an arc-shaped curved surface, and the convex side of the arc-shaped spring sheet is away from the protective ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Equipped with protective support components, if the inner conductor heats up during cable use, the heat will gradually diffuse into the filling layer, where it will be transferred by the heat-conducting strip to the heat-conducting silicone layer and the heat-conducting copper strip, and then to the metal tubular structure composed of spiral steel and spiral aluminum strips. The heat will then be dissipated to the outer insulation layer, where heat exchange with seawater will cool the cable. Since the heat-conducting strip, the heat-conducting silicone layer, the heat-conducting copper strip, and the spiral aluminum strip are all good conductors of heat, the heat conduction effect is good, and heat is not easy to accumulate. This avoids local overheating while ensuring the speed of heat dissipation, thus preventing the cable from overheating and accelerating aging and damage.

[0015] 2. It is equipped with external protective components, including protective rings, protective sleeves, and connecting pipes for submarine cables to protect the outer side of the cable and prevent the outer insulation layer from directly contacting the seabed. The deformation of the arc-shaped spring sheet can also absorb the buffer force. When the cable is impacted and bent, the connecting plate slides and bends inside the connecting pipe. The connecting plate is made of stainless steel spring steel, which absorbs the impact force during bending and protects the cable to prevent the cable from being damaged due to excessive bending, thus providing better protection.

[0016] In summary, the spiral steel bars inside the protective support assembly, together with the protective ring on the outside of the outer protective assembly, provide stronger resistance to pressure and impact for the submarine cable. When the protective support assembly transfers heat to the outer insulation layer, the protective ring increases the heat exchange area through water-permeable holes and arc-shaped spring plates, thereby accelerating heat dissipation. The two components work together to provide better support and cooling effect, and better protect the cable. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the protective support component of the present invention; Figure 3 This is a schematic diagram of the installation structure of the heat-conducting copper strip of the present invention; Figure 4 This is the present invention. Figure 3 A schematic diagram of the structure of region A; Figure 5 This is a schematic diagram of the structure of the external protective component of the present invention; Figure 6This is a schematic diagram of the installation structure of the expansion rubber ring of the present invention; Numbering on the map: 1. Internal conductor; 2. Protective support components; 201. Filling layer; 202. Functional groove; 203. Carbon fiber cloth layer; 204. Thermally conductive silicone layer; 205. Thermally conductive copper strip; 206. Spiral steel strip; 207. Spiral aluminum strip; 208. Outer insulation layer; 209. Data cable; 210. Expansion rubber strip; 211. Steel wire strip; 212. Thermally conductive strip; 3. External protective components; 301. Protective ring; 302. Support block; 303. Water permeable hole; 304. Arc-shaped spring sheet; 305. Protective sleeve; 306. Connecting pipe; 307. Intermediate plate; 308. Expansion groove; 309. Expansion rubber ring. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: Figures 1-6 As shown, the present invention provides a technical solution for a 525KV submarine cable with strong pressure resistance, including three inner conductors 1. The inner conductors 1 are equipped with a protective support assembly 2. The protective support assembly 2 includes a filling layer 201, a functional groove 202, a carbon fiber cloth layer 203, a thermally conductive silicone layer 204, a thermally conductive copper strip 205, a spiral steel strip 206, a spiral aluminum strip 207, an outer insulation layer 208, a data cable 209, an expansion rubber strip 210, a steel wire strip 211, and a thermally conductive strip 212.

[0021] Three inner conductors 1 are all wrapped inside the filling layer 201. Functional slots 202 are evenly formed on the outer side of the filling layer 201 at the positions between the inner conductors 1. The functional slots 202 are staggered with the inner conductors 1. Carbon fiber cloth layers 203 are bonded to the outer side of the filling layer 201 and the functional slots 202, covering the slot walls of the functional slots 202. Thermally conductive silicone layer 204 is bonded to the outer side of the carbon fiber cloth layer 203. Thermally conductive copper strips 205 are wrapped around the outer side of the thermally conductive silicone layer 204. Spiral steel strips 206 are evenly wrapped around the outer side of the thermally conductive silicone layer 204. The spiral steel strips 206 are all on the outside of the thermally conductive silicone layer 204, the thermally conductive copper strip 205 is in the middle of the spiral steel strips 206, and the spiral aluminum strip 207 is wrapped around the outside of the thermally conductive silicone layer 204 at the position between the spiral steel strips 206 (that is, the gap formed by the bolt structure of the spiral steel strips 206). Both the spiral steel strips 206 and the spiral aluminum strip 207 are spiral-shaped and are tightly attached to each other. The diameters of the spiral steel strips 206 and the spiral aluminum strip 207 are equal, and the outside of the spiral steel strips 206 and the spiral aluminum strip 207 is wrapped with an outer insulating layer 208.

[0022] The functional slot 202 is inlaid with a data cable 209 and an expansion rubber strip 210. The expansion rubber strip 210 is located outside the data cable 209. The width of the functional slot 202 near the center of the filling layer 201 is smaller than the width of the functional slot 202 near the outer side of the filling layer 201. The outer side of the functional slot 202 near the filling layer 201 is chamfered to facilitate the filling of the data cable 209 and the expansion rubber strip 210 within the functional slot 202. The outer side of the thermally conductive silicone layer 204 and the expansion rubber strip 210 corresponds to the thermally conductive copper strip 205. An embedded groove is provided for engaging with the thermally conductive copper strip 205. The thermally conductive silicone layer 204, the expansion rubber strip 210, and the outer side of the thermally conductive copper strip 205 are all on the same curved surface, ensuring the tightness of the inside of the newspaper cable and preventing gaps from appearing inside. A steel wire strip 211 is installed through the middle of the expansion rubber strip 210. Several thermally conductive strips 212 are evenly distributed and installed around the outer side of the inner conductor 1 in the filling layer 201. One side of the thermally conductive strip 212 contacts the outer side of the inner conductor 1, and the other side is close to the outer side of the filling layer 201, improving the heat conduction effect.

[0023] An outer protective component 3 is installed on the outside of the outer insulation layer 208. The outer protective component 3 includes a protective ring 301, a support block 302, a water-permeable hole 303, an arc-shaped spring sheet 304, a protective sleeve 305, a connecting pipe 306, a middle connecting plate 307, an expansion groove 308, and an expansion rubber ring 309.

[0024] A number of protective rings 301 are axially spaced around the outer side of the outer insulation layer 208. Support blocks 302 and arc-shaped spring plates 304 are evenly welded around the outer side of the protective rings 301. The support blocks 302 and arc-shaped spring plates 304 are staggered. A water-permeable hole 303 is opened in the middle of the support block 302 along the axial direction. The end of the support block 302 away from the protective ring 301 is an arc-shaped curved surface. The convex side of the arc-shaped spring plate 304 is away from the protective ring 301 to facilitate support of the outer side of the protective cable. A protective sleeve 305 is sleeved on the outer side of the outer insulation layer 208 between adjacent protective rings 301. A connecting pipe 306 is evenly welded on the opposite side of the protective rings 301. One end of the two connecting pipes 306 on the same side is slidably sleeved on both ends of the middle connecting plate 307. An expansion groove 308 is opened on the inner side of the protective sleeve 305. An expansion rubber ring 309 is bonded inside the expansion groove 308 to improve the sealing of the connection.

[0025] The working principle and usage process of this invention are as follows: Heat-conducting strips 212, which are aluminum sheets, are placed on the outside of the three inner conductors 1. Then, a filling layer 201 is wrapped around the outside of the inner conductors 1, and a functional groove 202 is reserved. A carbon fiber cloth layer 203 is bonded to the outside of the filling layer 201 and the functional groove 202. Next, a heat-conducting silicone layer 204 is wrapped around the outside of the carbon fiber cloth layer 203. The required data cable 209 is placed in the functional groove 202. Then, an expansion rubber strip 210 is snapped into the functional groove 202. The heat-conducting silicone layer 204 and a heat-conducting copper strip 205 are wrapped around the outside. Then, a spiral steel strip 206 and a spiral aluminum strip 207 are wrapped around the outside. The spiral steel strip 206 and the spiral aluminum strip 207 are arranged alternately and tightly. Then, an outer insulation layer 208 is wrapped around the outside of the outer insulation layer 208. A protective ring 301 and a protective sleeve 305 are alternately sleeved on the outside of the outer insulation layer 208. The two ends of the connecting plate 307 are sleeved on the opposite ends of the connecting pipe 306, thus completing the cable assembly and production operation.

[0026] The spiral steel bar 206 serves as an armor layer, supporting the cable and improving its compressive strength. During use, if the inner conductor 1 heats up, the heat will gradually diffuse into the filler layer 201, where it is transferred by the heat-conducting strip 212 to the heat-conducting silicone layer 204 and the heat-conducting copper strip 205. The heat is then transferred to the metal tubular structure composed of the spiral steel bar 206 and the spiral aluminum strip 207, and finally dissipated to the outer insulation layer 208. The outer insulation layer 208 exchanges heat with seawater to cool the cable. Since the heat-conducting strip 212, the heat-conducting silicone layer 204, the heat-conducting copper strip 205, and the spiral aluminum strip 207 are all good conductors of heat, they have excellent thermal conductivity, preventing heat accumulation and ensuring rapid heat dissipation to prevent overheating and accelerated aging and damage to the cable.

[0027] Even if the outer side of the cable is damaged and leaks water due to various factors, the expansion rubber strip 210 will absorb water and impact, and squeeze the functional groove 202, in conjunction with the carbon fiber cloth layer 203, to prevent water from seeping into the inner conductor 1, thereby improving safety.

[0028] During the laying of submarine cables, the protective ring 301, protective sleeve 305, and connecting pipe 306 protect the outer side of the cable, preventing the outer insulation layer 208 from directly contacting the seabed. The protective ring 301 is equipped with a support block 302 and an arc-shaped spring plate 304 on its outer side, which not only provides higher strength but also allows the arc-shaped spring plate 304 to absorb and buffer the force when deformed. When the cable is impacted and bent, the connecting plate 307 slides and bends within the connecting pipe 306. The expansion rubber rings 309 in the expansion grooves 308 at both ends of the protective sleeve 305 will leak water due to the widening gap between the protective ring 301 and the protective sleeve 305. The expansion rubber rings 309 absorb water and expand, preventing the waterproof performance of the protective ring 301 and the protective sleeve 305 from being reduced due to the widening gap, thus reducing the probability of leakage. The connecting plate 307 is made of stainless steel spring steel, which absorbs the impact force during bending and protects the cable, preventing the cable from being damaged due to excessive bending, thus providing better protection.

[0029] The spiral steel bar 206 inside the protective support component 2 provides internal support, which, together with the protective ring 301 on the outside of the outer protective component 3, makes the submarine cable more resistant to pressure and impact. When the protective support component 2 transfers heat to the outer insulation layer 208, the protective ring 301 increases the heat exchange area through the water-permeable hole 303 and the arc-shaped spring plate 304, thereby accelerating heat dissipation. The two components work together to provide better support and cooling effect, and better protect the cable.

[0030] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A 525KV submarine cable with high voltage resistance, characterized in that, The system includes several inner conductors (1), each inner conductor (1) is fitted with a protective support assembly (2), the protective support assembly (2) includes a filling layer (201), the inner conductors (1) are all wrapped inside the filling layer (201), the outer side of the filling layer (201) is surrounded by several functional grooves (202), the functional grooves (202) are staggered with the inner conductors (1), and a carbon fiber cloth layer (203) is bonded to the outer side of the filling layer (201), the carbon fiber cloth layer (203) covering the functional grooves (202, 203, 202). The wall of the groove of 202) has a thermally conductive silicone layer (204) bonded to the outside of the carbon fiber cloth layer (203), a thermally conductive copper strip (205) wrapped around the outside of the thermally conductive silicone layer (204), a spiral steel strip (206) uniformly wrapped around the outside of the thermally conductive silicone layer (204), a spiral aluminum strip (207) wrapped around the outside of the thermally conductive silicone layer (204) between the spiral steel strips (206), and an outer insulation layer (208) wrapped around the outside of the spiral steel strips (206) and the spiral aluminum strips (207).

2. The 525KV submarine cable with high withstand voltage as described in claim 1, characterized in that, The functional slot (202) is inlaid with a data cable (209) and an expansion rubber strip (210). The expansion rubber strip (210) is located outside the data cable (209), and a steel wire strip (211) is installed through the middle of the expansion rubber strip (210).

3. A 525KV submarine cable with high withstand voltage as described in claim 1, characterized in that, Both the spiral steel strip (206) and the spiral aluminum strip (207) are spiral-shaped and are closely fitted together. The spiral steel strip (206) and the spiral aluminum strip (207) have the same diameter.

4. A 525KV submarine cable with high withstand voltage as described in claim 2, characterized in that, The outer sides of the thermally conductive silicone layer (204) and the expansion rubber strip (210) are provided with embedded grooves for engaging with the thermally conductive copper strip (205). The outer sides of the thermally conductive silicone layer (204), the expansion rubber strip (210) and the thermally conductive copper strip (205) are all on the same curved surface.

5. A 525KV submarine cable with high withstand voltage as described in claim 1, characterized in that, A plurality of heat-conducting strips (212) are installed through the ring cloth on the filling layer (201). The heat-conducting strips (212) are located outside the inner conductor (1). One side of the heat-conducting strip (212) contacts the outside of the inner conductor (1), and the other side is close to the outside of the filling layer (201).

6. A 525KV submarine cable with high withstand voltage as described in claim 1, characterized in that, The width of the functional groove (202) near the center of the filling layer (201) is smaller than the width of the functional groove (202) near the outer side of the filling layer (201), and the outer side of the functional groove (202) near the filling layer (201) is chamfered.

7. A 525KV submarine cable with high withstand voltage as described in claim 1, characterized in that, An outer protective assembly (3) is installed on the outside of the outer insulation layer (208). The outer protective assembly (3) includes a protective ring (301). Several protective rings (301) are axially spaced on the outside of the outer insulation layer (208). A protective sleeve (305) is sleeved on the outside of the outer insulation layer (208) between adjacent protective rings (301). A connecting pipe (306) is uniformly welded on the opposite side of the protective ring (301). One end of the two connecting pipes (306) on the same side is slidably sleeved on both ends of the middle connecting plate (307).

8. A 525KV submarine cable with high withstand voltage as described in claim 7, characterized in that, The outer side of the protective ring (301) is provided with several support blocks (302) and arc-shaped spring plates (304), the support blocks (302) and arc-shaped spring plates (304) are arranged alternately, and the support blocks (302) are provided with water-permeable holes (303) along the axial direction.

9. A 525KV submarine cable with high withstand voltage as described in claim 7, characterized in that, An expansion groove (308) is provided on the inner side of the protective sleeve (305), and an expansion rubber ring (309) is bonded inside the expansion groove (308).

10. A 525KV submarine cable with high withstand voltage as described in claim 8, characterized in that, The support block (302) has an arc-shaped curved surface at the end away from the protective ring (301), and the arc-shaped spring sheet (304) has an outward convex side away from the protective ring (301).

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