Deep-sea high-voltage anticorrosion cable

Abstract

The application relates to the technical field of deep-sea cables, and discloses a deep-sea high-voltage anticorrosive cable which comprises, from outside to inside, a rubber layer, a supporting and protecting layer and a cable core structure; the supporting and protecting layer comprises, from outside to inside, a supporting rib, a water-swelling expansion belt and a splicing sleeve; the splicing sleeve comprises a base and a first supporting block; the first supporting block is a hollow structure and is filled with an adhesive; the base is provided with a first clamping groove for accommodating the first supporting block; the first clamping groove is provided with a first adhesive groove; and the first adhesive groove is provided with a first pressing needle. When the expansion belt swells, the first supporting block is extruded to move into the first adhesive groove. After the supporting rib is corroded and fails, the splicing sleeve can still support and protect the cable core structure, ensures the normal transmission of the power signal of the cable, and effectively prolongs the service life of the cable in the deep sea.

Description

Technical Field

[0001] This invention relates to the field of deep-sea cable technology, and in particular to a deep-sea high-voltage corrosion-resistant cable. Background Technology

[0002] Power cables are cables used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power plant lead-out lines, internal power supply for industrial and mining enterprises, and underwater power transmission lines across rivers and seas. Deep-sea cables are laid on the seabed and are in constant contact with seawater, thus being subject to seawater corrosion.

[0003] Existing cables are basically composed of three parts: a rubber sheath, a supporting protective layer, and an inner core. The rubber sheath is generally made of rubber, which is corrosion-resistant and flexible. The supporting protective layer is generally made of metal wire, which is wear-resistant and not easily broken, and is used to ensure the overall physical properties of the cable, such as compressive, tensile, and shear resistance. The inner core is the cable core used to transmit power signals. This type of cable can generally meet the needs of use on land. However, because this type of cable has a near-solid structure, when it is impacted on the seabed, the impact force is first absorbed by the outermost rubber sheath. The cable does not have a corresponding shock-absorbing and buffering design, resulting in poor elastic deformation ability. The rubber sheath is easily damaged. In the high-pressure and highly corrosive environment of the deep sea or islands, once the rubber sheath is torn by marine organisms or sharp sand and rocks, seawater can easily corrode the inner supporting protective layer. Over time, this can easily cause it to fail in its protective function, eventually exposing the cable core directly to seawater, causing power signal transmission failure. The service life of existing cables in the sea is relatively short.

[0004] Therefore, it is necessary to propose a deep-sea high-voltage corrosion-resistant cable to improve the service life of the cable in the deep sea. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of the short service life of existing cables in deep sea, and to provide a deep-sea high-voltage corrosion-resistant cable.

[0006] The technical solution of this invention is: A deep-sea high-voltage corrosion-resistant cable includes, from the outside to the inside, a rubber layer, a support and protection layer and a cable core structure. The support and protection layer includes, from the outside to the inside, a support rib, a water-swellable expansion band and a splicing sleeve. The splicing sleeve includes a base and a first support block. The first support block has a hollow structure and is filled with adhesive. The base has a first slot to accommodate the first support block. The first slot has a first adhesive groove and a first pressure pin. When the expansion band expands, it squeezes the first support block to move into the first adhesive groove. The first pressure pin punctures the first support block to allow the adhesive inside to flow out, thereby bonding and fixing the base and the first support block together.

[0007] Furthermore, the splicing sleeve also includes a second support block, which is a hollow structure and is filled with contents that react with the adhesive. The base is provided with a second slot, and the second slot is provided with a second adhesive groove to accommodate the second support block. A pressure plate is provided at the opening of the second slot. One end of the pressure plate is movable, and the other end of the pressure plate is fixedly connected to the base. A second pressure pin is provided on the side of the pressure plate opposite to the second slot. When the expansion band expands, it squeezes the pressure plate to deform, thereby causing the second pressure pin to pierce the second support block and release its contents, so as to accelerate the bonding of the adhesive.

[0008] Furthermore, a second isolation membrane is provided between the expansion band and the splicing sleeve. The second isolation membrane is sleeved on the outside of the splicing sleeve to isolate and seal the expansion band from the splicing sleeve. The expansion band is wrapped around the outside of the second isolation membrane.

[0009] Furthermore, an adhesive channel is provided between the first adhesive groove and the second adhesive groove. The adhesive enters the second adhesive groove through the adhesive channel, thereby bonding and fixing the second support block to the second adhesive groove.

[0010] Furthermore, the contents are gas or liquid.

[0011] Furthermore, both the first and second pressure needles are conical, and the surface of the conical shape has several dissipation channels.

[0012] Furthermore, the cable core structure includes a support tube and an inner core, with the inner core placed inside the support tube.

[0013] Furthermore, the rubber layer comprises, from the outside to the inside, a rubber layer and a first release membrane.

[0014] Furthermore, the expansion band includes water-swellable rubber and a shaping band, with the water-swellable rubber placed inside the shaping band, which allows water to pass through.

[0015] The deep-sea high-voltage corrosion-resistant cable of the present invention has the following beneficial effects: 1. The splicing sleeve in this cable is composed of a base and a first support block. The first support block can move in the first slot and the first adhesive groove. When the cable is squeezed, the first support block can be squeezed into the first adhesive groove, realizing a change in volume and playing a shock absorption role. This reduces the impact on the rubber layer to a certain extent, reduces the probability of damage to the rubber layer, and thus improves the service life of the cable.

[0016] 2. When the rubber layer is severely damaged due to impact, seawater seeps through the gaps in the support ribs and comes into contact with the expansion band. The expansion band expands upon contact with water. Since the rubber layer has only recently been damaged, the support ribs are not yet corroded. At this time, the support ribs still have the effect of fixing, limiting, and shaping the expansion band, so that the expansion band can only expand inward, squeezing the splicing sleeve and causing the first support block to enter the first adhesive groove. The first pressure pin punctures the first support block, causing the adhesive inside to flow out, thus achieving the bonding and fixation between the base and the first support block. After the base and the first support block are bonded and fixed, the splicing sleeve is equivalent to becoming a whole, which can replace the support ribs to a certain extent, providing support and protection for the cable. Therefore, even after the rubber layer is damaged and the support ribs are corroded and fail, the splicing sleeve can still provide support and protection for the cable core structure, ensuring the normal transmission of power signals in the cable and effectively improving the service life of the cable in deep sea. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the state used in this invention; Figure 3 For the present invention Figure 1 Enlarged view of a portion of point A in the middle; Figure 4 This is a cross-sectional view of the expansion zone of the present invention.

[0018] Reference numerals: 1. Supporting rib; 2. Expansion band; 3. Splicing sleeve; 4. Base; 5. First support block; 6. First adhesive groove; 7. First pressure pin; 8. Second support block; 9. Second slot; 10. Second adhesive groove; 11. Pressure plate; 12. Second pressure pin; 13. Second release membrane; 14. Adhesion channel; 15. Dispersion channel; 16. Support tube; 17. Inner core; 18. Rubber layer; 19. First release membrane; 20. Water-swellable rubber; 21. Shaping band; 22. First slot. Detailed Implementation

[0019] To make the technical means, technical features, inventive purpose and technical effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0020] Example 1: like Figure 1 and Figure 2As shown, this embodiment provides a deep-sea high-voltage corrosion-resistant cable, which includes, from the outside to the inside, a rubber layer, a support and protective layer, and a cable core structure. The support and protective layer includes, from the outside to the inside, a support rib 1, a water-swellable expansion band 2, and a splicing sleeve 3. The splicing sleeve 3 includes a base 4 and a first support block 5. The base 4 and the first support block 5 are made of plastic or other non-metallic materials that can be punctured by the first pressure needle 7 and the second pressure needle 12. When selecting materials for the splicing sleeve 3, care should be taken to ensure that the material does not react with one or more of water, adhesives, and oxygen. The first support block 5 has a hollow structure and its The base 4 is filled with adhesive and has a first slot 22 for accommodating the first support block 5. The first slot 22 has a first adhesive groove 6 and a first pressure needle 7. When the expansion band 2 expands, it squeezes the first support block 5 and moves it into the first adhesive groove 6. The first pressure needle 7 punctures the first support block 5, causing the adhesive inside to flow out, thereby bonding and fixing the base 4 and the first support block 5. Preferably, the support rib 1 is one of iron wire, steel wire, aluminum wire or alloy wire. It can also be wrapped around the outside of the expansion band 2 by a weaving process. It is commercially available.

[0021] The splicing sleeve 3 is composed of a base 4 and a first support block 5. The first support block 5 can move within the first slot 22 and the first adhesive groove 6. When the cable is compressed, the first support block 5 can be squeezed into the first adhesive groove 6, achieving a change in volume and providing a shock absorption effect. This reduces the impact on the rubber layer to a certain extent, lowers the probability of damage to the rubber layer, and thus improves the service life of the cable. When the rubber layer is severely damaged due to impact, seawater seeps through the gaps in the support rib 1 and comes into contact with the expansion band 2. The expansion band 2 expands upon contact with water. Since the rubber layer has only recently been damaged, the support rib 1 is not corroded. At this time, the support rib 1 still provides support to the expansion band 2. The expansion band 2 expands inwards only, compressing the splicing sleeve 3 and causing the first support block 5 to enter the first adhesive groove 6. The first pressure needle 7 punctures the first support block 5, causing the adhesive inside to flow out, thus achieving the bonding and fixation between the base 4 and the first support block 5. After the base 4 and the first support block 5 are bonded and fixed, the splicing sleeve 3 becomes a whole, which can replace the support rib 1 to a certain extent, providing support and protection for the cable. Therefore, even if the rubber layer is damaged and the support rib 1 is corroded and fails, the splicing sleeve 3 can still provide support and protection for the cable core structure, ensuring the normal transmission of the cable's power signals and effectively improving the cable's service life in the deep sea.

[0022] Preferred, such as Figure 1 and Figure 2As shown, the splicing sleeve 3 also includes a second support block 8. The second support block 8 has a hollow structure and is filled with contents that react with the adhesive. The base 4 is provided with a second slot 9. The second slot 9 is provided with a second adhesive groove 10 to accommodate the second support block 8. A pressure plate 11 is provided at the opening of the second slot 9. One end of the pressure plate 11 is movable, and the other end of the pressure plate 11 is fixedly connected to the base 4. A second pressure needle 12 is provided on the side of the pressure plate 11 opposite to the second slot 9. When the expansion band 2 expands, it squeezes the pressure plate 11 to deform, thereby causing the second pressure needle 12 to pierce the second support block 8 and release its contents, so as to accelerate the bonding of the adhesive. After the second support block 8 and the base 4 are bonded and fixed, the effect is the same as that of the base 4 and the first support block 5 being bonded and fixed, which improves the structural strength and stability of the splicing sleeve 3 and replaces the support rib 1 to continue to provide support for the cable. Preferably, the second support block 8 and the pressure plate 11 are made of the same material as the base 4. The main component of the adhesive is ethyl α-cyanoacrylate or moisture-curing polyurethane adhesive (PUR adhesive), which can react with moisture in the air and harden quickly to achieve the bonding effect.

[0023] Specifically, the splicing sleeve 3 is designed as a combination of a base 4, a first support block 5, and a second support block 8. This design facilitates production because both the first support block 5 and the second support block 8 are hollow structures, making independent production more efficient and easier to fill with the corresponding adhesive and contents. The base 4 can be directly injection molded, which is also convenient for production. On the other hand, only a combined structure can enable the splicing sleeve 3 to have the function of changing volume under pressure, thus achieving a buffering and decompression effect.

[0024] Preferred, such as Figure 1 and Figure 2 As shown, a second isolation membrane 13 is provided between the expansion band 2 and the splicing sleeve 3. The second isolation membrane 13 is sleeved on the outside of the splicing sleeve 3 to isolate and seal the expansion band 2 and the splicing sleeve 3. The expansion band 2 is wrapped around the outside of the second isolation membrane 13. The specific wrapping method can be single-band bolt wrapping or double-band braided wrapping. The end of the expansion band 2 is fixed. The second isolation membrane 13 can prevent seawater from entering the splicing sleeve 3, avoid the adhesive from being diluted and dispersed by seawater, and ensure the bonding effect. Moreover, the second isolation membrane 13 can disperse the extrusion pressure of the expansion band 2, making the extrusion more uniform, and ensuring that the splicing sleeve 3 near the seawater intrusion area can enter the bonding state. The second isolation membrane 13 is made of rubber.

[0025] Preferred, such as Figure 1 and Figure 2As shown, an adhesive channel 14 is provided between the first adhesive groove 6 and the second adhesive groove 10. The adhesive enters the second adhesive groove 10 through the adhesive channel 14, thereby bonding and fixing the second support block 8 to the second adhesive groove 10. Specifically, the position of the first support block 5 is more protruding than that of the second support block 8, so that when the expansion band 2 expands, it preferentially squeezes the first support block 5 to contact the first pressure needle 7, causing the first support block 5 to break first than the second support block 8. When the first support block 5 reaches the first adhesive groove 6 and the deformation exceeds half, under the dual action of gravity and deformation compression, the first support block... The adhesive in section 5 has almost completely flowed out and into the second adhesive groove 10 through the adhesive channel 14. At this time, the first support block 5 is flush with the pressure plate 11, and the expansion band 2 continues to expand, simultaneously squeezing the first support block 5 and the pressure plate 11. The second pressure needle 12 on the pressure plate 11 punctures the second support block 8, releasing humid air and accelerating the hardening of the adhesive, thus fixing the base 4, the first support block 5, and the second support block 8 into a whole. As time goes on, the expansion band 2 continues to expand, gradually filling the gaps in the support rib 1, preventing seawater from entering and providing a sealing and protective function. Preferably, the first support block 5 is fixed in the first slot 22 by a snap-fit ​​or by compression, and the second support block 8 is fixed in the second adhesive groove 10 by a snap-fit ​​or by compression. Both snap-fit ​​and compression fixing methods use conventional techniques, and the specific fixing methods and structures will not be described in detail here.

[0026] Preferably, the contents are gas or liquid, and more preferably, the contents are gas, and the gas is air with a humidity of 70% or more.

[0027] Preferred, such as Figure 3 Both the first pressure needle 7 and the second pressure needle 12 are conical, and the surface of the conical shape is provided with a plurality of flow channels 15. When the first pressure needle 7 pierces the first support block 5 and the second pressure needle 12 pierces the second support block 8, the flow channels 15 can allow the adhesive and air inside to flow out, avoiding the phenomenon of the pressure needle blocking the piercing opening. Preferably, there are three flow channels 15, which are evenly distributed in a ring on the surface of the conical shape.

[0028] Preferably, the cable core structure includes a support tube 16 and an inner core 17, with the inner core 17 placed inside the support tube 16. The support tube 16 and the inner core 17 are obtained through commercial purchase.

[0029] Preferably, the rubber layer includes a rubber layer 18 and a first isolation membrane 19 from the outside to the inside. The first isolation membrane 19 is made of plastic or rubber and is used to buffer the friction and extrusion between the rubber layer 18 and the support rib 1.

[0030] It should be noted that, in order to possess certain basic properties of traditional cables such as fire resistance, insulation, and interference resistance, corresponding structural layers can be added between the rubber layer and the supporting protective layer, and between the supporting protective layer and the cable core structure, to ensure the basic performance of this cable. Since the structural layers corresponding to these properties are all materials commonly used in the current cable industry, those skilled in the art can automatically select them according to actual needs, and will not elaborate further here.

[0031] Preferred, such as Figure 4 The expansion band 2 includes water-swellable rubber 20 and shaping band 21. The water-swellable rubber 20 is placed inside the shaping band 21. The shaping band 21 is made of a material that allows water to pass through, such as cotton, artificial cotton and other woven bands with specific shaping functions.

[0032] Working principle: such as Figures 1-4 When in use, the cable is installed on the seabed. When the cable is impacted, if the impact is small, the deformation of the rubber layer and the splicing sleeve 3 can share the impact, preventing the rubber layer from breaking directly. When the impact is large, the rubber layer breaks, and seawater enters the support and protection layer and comes into contact with the expansion band 2. The expansion band 2 expands when it comes into contact with water, squeezing the first support block 5 and moving it into the first adhesive groove 6, thereby releasing the adhesive. When the expansion band 2 continues to expand, the second support block 8 is punctured by the second pressure pin 12 on the pressure plate 11, releasing air and hardening the bonding area, so that both the first support block 5 and the second support block 8 are bonded to the base 4, replacing the support rib 1 to protect the cable.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the claims of this invention should fall within the technical scope of this invention.

Claims

1. A deep-sea high-voltage corrosion-resistant cable, comprising, from the outside to the inside, a rubber layer, a supporting protective layer, and a cable core structure, characterized in that: The support protective layer consists of, from the outside to the inside, a support rib (1), an expansion band that expands when exposed to water (2), and a splicing sleeve (3). The splicing sleeve (3) includes a base (4) and a first support block (5). The first support block (5) is a hollow structure and is filled with adhesive. The base (4) has a first slot (22) for accommodating the first support block (5). The first slot (22) has a first adhesive groove (6). The first adhesive groove (6) has a first pressure pin (7). When the expansion band (2) expands, it squeezes the first support block (5) and moves it into the first adhesive groove (6). The first pressure pin (7) punctures the first support block (5) to make the adhesive inside flow out, thereby bonding and fixing the base (4) and the first support block (5).

2. The deep-sea high-voltage corrosion-resistant cable according to claim 1, characterized in that: The splicing sleeve (3) also includes a second support block (8). The second support block (8) is a hollow structure and is filled with contents that react with the adhesive. The base (4) is provided with a second slot (9). The second slot (9) is provided with a second adhesive groove (10) that accommodates the second support block (8). The opening of the second slot (9) is provided with a pressure plate (11). One end of the pressure plate (11) is in a movable state, and the other end of the pressure plate (11) is fixedly connected to the base (4). The side of the pressure plate (11) opposite to the second slot (9) is provided with a second pressure needle (12). When the expansion band (2) expands, it squeezes the pressure plate (11) to deform, thereby causing the second pressure needle (12) to pierce the second support block (8) and cause its contents to spill out, so as to accelerate the bonding of the adhesive.

3. The deep-sea high-voltage corrosion-resistant cable according to claim 1 or 2, characterized in that: A second isolation membrane (13) is provided between the expansion band (2) and the splicing sleeve (3). The second isolation membrane (13) is sleeved on the outside of the splicing sleeve (3) to isolate and seal the expansion band (2) and the splicing sleeve (3). The expansion band (2) is wrapped around the outside of the second isolation membrane (13).

4. The deep-sea high-voltage corrosion-resistant cable according to claim 2, characterized in that: An adhesive channel (14) is provided between the first adhesive groove (6) and the second adhesive groove (10). The adhesive enters the second adhesive groove (10) through the adhesive channel (14) and then bonds and fixes the second support block (8) to the second adhesive groove (10).

5. The deep-sea high-voltage corrosion-resistant cable according to claim 2 or 4, characterized in that: The contents are gas or liquid.

6. The deep-sea high-voltage corrosion-resistant cable according to claim 2, characterized in that: Both the first pressure needle (7) and the second pressure needle (12) are conical, and the surface of the conical shape is provided with several diffusion channels (15).

7. The deep-sea high-voltage corrosion-resistant cable according to claim 1, characterized in that: The cable core structure includes a support tube (16) and an inner core (17), with the inner core (17) placed inside the support tube (16).

8. The deep-sea high-voltage corrosion-resistant cable according to claim 1, characterized in that: The rubber layer consists of a rubber layer (18) and a first release membrane (19) from the outside to the inside.

9. The deep-sea high-voltage corrosion-resistant cable according to claim 1, characterized in that: The expansion band (2) includes water-swellable rubber (20) and a shaping band (21). The water-swellable rubber (20) is placed inside the shaping band (21), which allows water to pass through.

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