An underground moisture-proof cable

Abstract

The present invention discloses a buried moisture-proof cable, which relates to the technical field of cables and includes an outer protective layer. An outer filling tape is wound on the inner wall of the outer protective layer. An outer insulating layer is sleeved on the inner wall of the outer filling tape. An inner protective layer is sleeved on the inner wall of the outer insulating layer. An inner insulating layer is sleeved on the inner wall of the inner protective layer. An inner filling strip is sleeved on the inner wall of the inner insulating layer. A plurality of wires are sleeved on the inner wall of the inner filling strip. It also includes a leak repair component and a water blocking component. Through the setting of the leak repair component, when the sealing material in the cable well cracks and leaks, a plurality of stirring drill rods can pierce and crush the side wall of the material chamber, and stir and mix the clear water in the clear water chamber and the leak stopper in the material chamber to form a foaming material with good toughness and elasticity, filling the gaps generated in the sealing material around the leak repair component and playing a sealing role.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly to a buried moisture-proof cable. Background Art

[0002] A cable is a wire composed of one or more mutually insulated conductors and an outer insulating layer, used to transmit electricity or information from one place to another. It has the characteristics of conducting electricity inside and being insulated outside, and can ensure the stable transmission of electrical energy or information. The structure of a cable usually includes the following parts: a conductor, which is the part that transmits current and is usually made of conductive materials such as copper or aluminum; an insulating layer, which is wrapped outside the conductor to prevent current leakage and short circuits. Common insulating materials include polyethylene, polyvinyl chloride, etc.; an inner protective layer, sometimes added outside the insulating layer to prevent moisture and other impurities from entering the cable interior; an outer protective layer, added outside the inner protective layer or the insulating layer to protect the cable from mechanical damage and environmental impacts. Common outer protective layer materials include polyethylene, polyvinyl chloride, rubber, etc. When a cable is buried in a relatively humid or water-seeping place, there is a risk of water ingress after the outer protective layer is damaged, which affects the cable performance and poses a safety hazard.

[0003] For example, the Chinese patent with the application number CN201410404076.0 discloses a cable, which includes a plurality of insulated cores. These insulated cores are stranded into a cable. Each insulated core includes a conductor and an insulating layer. An aluminum sleeve is extruded on the outer surface of the cable. The stranding pitch of the insulated cores is the same as the pitch of the aluminum sleeve. By directly extruding an aluminum sleeve outside the cable, on the one hand, the consumption of filling materials is reduced. On the other hand, the outer diameter of the aluminum sleeve itself is reduced, and less material is consumed. The length of the aluminum sleeve is the same as the length of the cable, and the linear resistance is small. The contact between the aluminum sleeve and the cable core changes from a linear shape to an arc surface and is no longer isolated by air, so the heat dissipation effect is greatly improved, and its current-carrying capacity is also enhanced.

[0004] In the prior art, a cable well is usually set when burying a cable. When the cable well is set in an area prone to water seepage, it is necessary to seal the connection position between the cable and the cable well. However, as the service time increases, there is a situation of cracking and water seepage at the sealed position, resulting in groundwater seeping into the cable well along the connection position, making the cable interface in the cable well easily get damp and being inconvenient for subsequent personnel to repair.

[0005] Therefore, the present invention proposes a buried moisture-proof cable to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a buried moisture-proof cable, which solves the technical problems proposed in the above background art through the mutual cooperation of a leak repair component and a water blocking component.

[0007] To achieve the above object, the present invention provides the following technical solution: A buried moisture-proof cable, including an outer protective layer, an outer filling tape is wound on the inner wall of the outer protective layer, an outer insulating layer is sleeved on the inner wall of the outer filling tape, an inner protective layer is sleeved on the inner wall of the outer insulating layer, an inner insulating layer is sleeved on the inner wall of the inner protective layer, an inner filling strip is sleeved on the inner wall of the inner insulating layer, and a plurality of wires are sleeved on the inner wall of the inner filling strip;

[0008] It further includes a leak repair component, the leak repair component includes a material chamber, two clear water chambers and two expansion chambers, clear water is provided in the clear water chambers, a leak stoppage agent is provided in the material chamber, and the leak stoppage agent is used to repair the water seepage at the cable well connection port by mixing the clear water and the leak stoppage agent and then extruding;

[0009] A water blocking component, the water blocking component includes a water blocking ring, the water blocking ring is connected to the outer wall of the outer insulating layer, and water blocking powder is provided inside the water blocking ring, and the water blocking powder is used to block the water path inside the outer protective layer by using the principle of water expansion of the water blocking powder.

[0010] Preferably, the material chamber, the two clear water chambers and the two expansion chambers are all hollow annularly arranged, the material chamber, the two clear water chambers and the two expansion chambers are all sleeved on the outer wall of the outer protective layer, the two clear water chambers are respectively connected to both ends of the material chamber, and the two expansion chambers are respectively connected to the ends of the two clear water chambers far away from the material chamber.

[0011] Preferably, an expansion ring is provided inside the expansion chamber, the expansion ring is made of a water-swelling material, and a push ring abuts against one side of the expansion ring close to the clear water chamber.

[0012] Preferably, a plurality of square grooves are opened at one end of the expansion chamber far away from the clear water chamber, a check valve plate is rotatably installed in the square groove, there is a gap between the check valve plate and the square groove, and the check valve plate abuts against the side of the expansion ring far away from the clear water chamber.

[0013] Preferably, a plurality of stirring drill rods are provided in the clear water chamber, a conical head is provided at the right end of the stirring drill rod, a plurality of stirring blades are provided on the outer wall of the right half section of the stirring drill rod, a thread groove is provided on the outer wall of the left half section of the stirring drill rod, and a plurality of threaded holes are opened on the side wall of the clear water chamber, and the thread grooves of the plurality of stirring drill rods are respectively threadedly connected to the plurality of threaded holes of the clear water chamber.

[0014] Preferably, a smooth convex block is provided at the left end of the stirring drill rod, and the side of the push ring close to the clear water chamber abuts against the convex blocks of the plurality of stirring drill rods.

[0015] Preferably, the side walls on the left and right sides of the material chamber are made of brittle materials, the stirring drill rod contacts the side wall of the material chamber during movement, and a plurality of thin films are provided on the outer wall of the material chamber.

[0016] Preferably, the water-blocking ring is divided into an inner ring, two side ring walls and an outer ring. The inner wall of the inner ring is connected to the outer wall of the outer insulation layer. The outer wall of the outer ring contacts the inner wall of the outer protection layer. The two side ring walls are connected between the inner ring and the outer ring. A plurality of breaks are provided on the outer ring, and a plurality of water holes are provided on the side ring walls.

[0017] Preferably, a plurality of mounting grooves are formed on the outer ring, and heat dissipation fins are rotatably connected in the plurality of mounting grooves of the outer ring respectively. One end of the heat dissipation fin away from the outer ring is rotatably connected to the inner ring, and the plurality of heat dissipation fins are arranged in a circumferential array with the center of the inner ring as the center.

[0018] Preferably, a plurality of water-blocking components are provided, and the plurality of water-blocking components are evenly distributed in the outer protection layer. A plurality of heat conduction fins are connected through the inner protection layer, and the plurality of heat conduction fins are respectively located at the positions where the plurality of water-blocking components are located.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. Through the multi-layer protection of the outer filling strip, the outer insulation layer, the inner protection layer, the inner insulation layer and the inner filling strip for a plurality of wires, the present invention plays a certain moisture-proof role. In particular, the inner filling strip provides a tight support for the plurality of wires, which can play a certain water-blocking role while avoiding wire deformation and improving the moisture-proof performance. At the same time, through the setting of the leak repair component, when the sealing material in the cable well cracks and leaks, the plurality of stirring drill rods can pierce and crush the side wall of the material chamber, and stir and mix the clear water in the clear water chamber and the leak repair agent in the material chamber to form a foaming material with good toughness and elasticity. After the foaming material expands, it will break through a plurality of films and seep out from the outer wall of the material chamber to fill the gaps generated in the sealing material around the leak repair component, filling the water leakage gaps from the inside and playing a sealing role.

[0021] 2. By evenly arranging a plurality of water-blocking components, the present invention enables two of the water-blocking components to intercept the water seeping into the outer protection layer in the middle, reducing the seepage area. And after the water-blocking ring expands, it will cause the outer protection layer to bulge to a certain extent, which is convenient for maintenance personnel to find the damaged section and replace the outer protection layer.

[0022] 3. Through the cooperation of the heat conduction fins and the heat dissipation fins, in the outer protection layer provided with the water-blocking component, when the water-blocking material in the water-blocking ring expands, the heat conduction fins in this area can improve the efficiency of transferring heat to the outer insulation layer. One end of each of the plurality of heat dissipation fins can remain in contact with the inner ring and the other end in contact with the outer ring before and after expansion, so that the plurality of heat dissipation fins absorb the heat transferred from the outer insulation layer to the inner ring and transfer it to the outer ring, and finally dissipate it through the outer ring to the outer protection layer, achieving a good heat dissipation effect and avoiding the influence of the expansion of the water-blocking material on the heat dissipation effect in this area. Description of the Drawings

[0023] Figure 1 This is the external view schematic diagram of a buried moisture-proof cable of the present invention.

[0024] Figure 2 This is the overall structure schematic diagram of the present invention.

[0025] Figure 3 This is the sectional view schematic diagram of the outer protective layer of the present invention.

[0026] Figure 4 This is the sectional view schematic diagram of the inner insulating layer of the present invention.

[0027] Figure 5 This is the external view schematic diagram of the leak repair component of the present invention.

[0028] Figure 6 This is the sectional view schematic diagram of the leak repair component of the present invention.

[0029] Figure 7 This is the partial sectional view schematic diagram of the material chamber of the present invention.

[0030] Figure 8 This is the partial sectional view schematic diagram of the clear water chamber of the present invention.

[0031] Figure 9 This is the partial sectional view schematic diagram of the expansion chamber of the present invention.

[0032] Figure 10 This is the schematic diagram of the water-blocking component of the present invention.

[0033] Figure 11 This is the partial sectional view schematic diagram of the inner protective layer of the present invention.

[0034] Figure 12 This is the partial sectional view schematic diagram of the water-blocking ring of the present invention.

[0035] The reference signs are:

[0036] 1. Outer protective layer; 4. Outer filling tape; 5. Outer insulating layer; 6. Inner protective layer; 7. Inner insulating layer; 8. Inner filling strip; 9. Conducting wire; 10. Heat-conducting sheet;

[0037] 2. Leak repair component; 21. Material chamber; 22. Film; 23. Clear water chamber; 24. Stirring drill rod; 25. Thread groove; 26. Expansion chamber; 27. Pushing ring; 28. Expansion ring; 29. Square groove; 210. Check valve plate;

[0038] 3. Water-blocking component; 31. Water-blocking ring; 311. Inner ring; 312. Side ring wall; 313. Outer ring; 314. Water hole; 32. Heat sink. Detailed implementation manners

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0040] During the use process, it is found that when the cable well is set in an area prone to water seepage, although the connection position between the cable and the cable well is sealed, however, as the use time increases, there is a situation of cracking and water seepage at the sealed position, resulting in groundwater seeping into the cable well along the connection position, causing the cable interfaces in the cable well to be easily affected by moisture, and it is not convenient for subsequent personnel to overhaul. In order to solve the above problems, this embodiment is specifically invented.

[0041] Please refer to Figure 1 - Figure 4 As shown in, a buried moisture-proof cable according to an embodiment of the present invention includes an outer protective layer 1. An outer filling tape 4 is wound around the inner wall of the outer protective layer 1. An outer insulating layer 5 is sleeved on the inner wall of the outer filling tape 4. An inner protective layer 6 is sleeved on the inner wall of the outer insulating layer 5. An inner insulating layer 7 is sleeved on the inner wall of the inner protective layer 6. An inner filling strip 8 is sleeved on the inner wall of the inner insulating layer 7. A plurality of conducting wires 9 are sleeved on the inner wall of the inner filling strip 8. It further includes a leak repair component 2 and a water blocking component 3. The inner filling strip 8 is in close contact with the plurality of conducting wires 9, so that the inner filling strip 8 plays a certain supporting role and a certain water blocking role for the plurality of conducting wires 9. When water seeps into the inner insulating layer 7, the inner filling strip 8 can block the advancing route of the seepage water and narrow the seepage range.

[0042] Please refer to Figure 5 - Figure 6 As shown in, the leak repair component 2 includes a material chamber 21, two clear water chambers 23 and two expansion chambers 26. Clear water is provided in the clear water chamber 23. A leak stoppage agent is provided in the material chamber 21, and is used to repair the water seepage at the cable well connection port by mixing the clear water and the leak stoppage agent and then extruding. The material chamber 21, the two clear water chambers 23 and the two expansion chambers 26 are all hollow annularly arranged. The material chamber 21, the two clear water chambers 23 and the two expansion chambers 26 are all sleeved on the outer wall of the outer protective layer 1. The two clear water chambers 23 are respectively connected to both ends of the material chamber 21. The two expansion chambers 26 are respectively connected to the ends of the two clear water chambers 23 far from the material chamber 21. The material chamber 21, the two clear water chambers 23 and the two expansion chambers 26 form a whole, and its shape is similar to a hollow column. The leak repair component 2 is arranged in the wall panel of the cable well. After the cable connection construction is completed, when sealing the interface of the cable well wall panel, the leak repair component 2 is wrapped in the interface of the wall panel by using a sealing material.

[0043] Please refer to Figure 7 -Figure 9 , an expansion ring 28 is arranged inside the expansion chamber 26. The expansion ring 28 is made of a water-swellable material. A push ring 27 abuts against one side of the expansion ring 28 close to the fresh water chamber 23. A plurality of square grooves 29 are formed at one end of the expansion chamber 26 away from the fresh water chamber 23. A check valve plate 210 is rotatably installed in the square groove 29. There is a gap between the check valve plate 210 and the square groove 29. When the interface of the cable well leaks water, the water seeps into the expansion chamber 26 through the gaps between the plurality of square grooves 29 and the check valve plate 210. The check valve plate 210 abuts against one side of the expansion ring 28 away from the fresh water chamber 23. After absorbing the seepage water, the expansion ring 28 expands. After the expansion ring 28 expands, it extends to the left and right sides. After the expansion ring 28 is fully expanded, it presses the plurality of check valve plates 210 against the plurality of square grooves 29 to close the plurality of square grooves 29. At the same time, the expansion ring 28 pushes the push ring 27 towards the direction close to the fresh water chamber 23.

[0044] Please refer to Figure 6 - Figure 8 , a plurality of stirring drill rods 24 are arranged in the fresh water chamber 23. A conical head is arranged at the right end of the stirring drill rod 24. A plurality of stirring blades are arranged on the outer wall of the right half section of the stirring drill rod 24. A threaded groove 25 is arranged on the outer wall of the left half section of the stirring drill rod 24. A plurality of threaded holes are formed in the side wall of the fresh water chamber 23. The threaded grooves 25 of the plurality of stirring drill rods 24 are respectively threadedly connected with the plurality of threaded holes of the fresh water chamber 23. When the stirring drill rod 24 moves, it can rotate through the cooperation of the threaded groove 25 and the threaded hole of the fresh water chamber 23. A smooth convex block is arranged at the left end of the stirring drill rod 24. One side of the push ring 27 close to the fresh water chamber 23 abuts against the convex blocks of the plurality of stirring drill rods 24. The smooth convex block can rotate on the push ring 27. When the push ring 27 moves, it pushes the plurality of stirring drill rods 24 towards the direction close to the material chamber 21 through the plurality of push rings 27. The side walls on the left and right sides of the material chamber 21 are made of a fragile material. The stirring drill rod 24 contacts the side wall of the material chamber 21 during the movement process. During the movement and rotation process, the stirring drill rod 24 drills the side wall of the material chamber 21 with the conical head, so that the fresh water in the fresh water chamber 23 contacts the plugging agent in the material chamber 21, and through the agitation of the plurality of stirring blades, the fresh water and the plugging agent are stirred and mixed. After the fresh water and the plugging agent are mixed, they will expand to form a foaming material with good toughness and elasticity. A plurality of thin films 22 are arranged on the outer wall of the material chamber 21. After the foaming material expands, it will break through the plurality of thin films 22 and seep out from the outer wall of the material chamber 21 to fill the gaps generated in the sealing material around the leak repair component, filling the water leakage gap from the inside and playing a sealing role.

[0045] Please refer to Figure 10 - Figure 12The water-blocking component 3 includes a water-blocking ring 31, which is connected to the outer wall of the outer insulating layer 5. Water-blocking powder is arranged inside the water-blocking ring 31, which is used to block the water path inside the outer protective layer 1 by utilizing the principle that the water-blocking powder expands when it encounters water. The water-blocking ring 31 is divided into an inner ring 311, two side ring walls 312 and an outer ring 313. The inner wall of the inner ring 311 is connected to the outer wall of the outer insulating layer 5, the outer wall of the outer ring 313 is in contact with the inner wall of the outer protective layer 1, and the two side ring walls 312 are connected between the inner ring 311 and the outer ring 313. A plurality of fractures are arranged on the outer ring 313, and a plurality of water holes 314 are arranged on the side ring wall 312. The water-blocking component 3 is provided with a plurality of water-blocking components 3, which are evenly distributed in the outer protective layer 1. When one of the outer protective layer 1 is damaged, water will enter through the damaged position. Into the outer protective layer 1, since there are multiple water-blocking components 3 in the outer protective layer 1, the damaged position is located between two of the water-blocking components 3. During the infiltration process, water penetrates into the water-blocking ring 31 through multiple water holes 314. The water-blocking powder in the water-blocking ring 31 absorbs water and expands to form a water-blocking material. The water-blocking material opens the fracture of the outer ring 313, so that the outer ring 313 is separated from the two side ring walls 312. After the water-blocking material expands, the outer ring 313 is tightly pressed against the inner wall of the outer protective layer 1, and it also expands horizontally, so that the surrounding of the water-blocking ring 31 is wrapped by the water-blocking material. The water-blocking material can prevent water from continuing to penetrate into the remaining outer protective layers 1, and lock the seepage between the two water-blocking rings 31. After the water-blocking material expands, the outer protective layer 1 will bulge, which is convenient for the staff to find the damaged position during maintenance.

[0046] When in use, first after the cable wiring construction is completed, the leak-sealing component 2 can be adjusted to the interface of the cable well wall panel. When the interface of the cable well wall panel is sealed with sealing materials, the leak-sealing component 2 is wrapped in the interface of the wall panel with the sealing materials.

[0047] When water seeps from the interface of the cable well, water seeps into the expansion chamber 26 through the gaps between the multiple square grooves 29 and the check plates 210, and the expansion ring 28 absorbs the seeped water and expands. After the expansion ring 28 expands, it extends to the left and right sides. After the expansion ring 28 is fully expanded, it presses the multiple check plates 210 against the multiple square grooves 29 to close the multiple square grooves 29. At the same time, the expansion ring 28 pushes the push ring 27 toward the clean water chamber 23. When the push ring 27 moves, the multiple stirring drill rods 24 are pushed toward the material chamber 21 through the multiple push rings 27. When the stirring drill rods 24 move, they can rotate through the cooperation of the threaded grooves 25 and the threaded holes of the clean water chamber 23.

[0048] When the multiple stirring drill rods 24 on one of the clean water chambers 23 start to rotate and move, the stirring drill rod 24 uses the cone head to drill and break the side wall of the material chamber 21 during the movement and rotation process, so that the clean water in the clean water chamber 23 contacts the plugging agent in the material chamber 21, and the clean water and the plugging agent are stirred and mixed by stirring with multiple stirring blades. After the clean water and the plugging agent are mixed, they will expand to form a foaming material with good toughness and elasticity. After the foaming material expands, it will squeeze out multiple films 22 and seep out from the outer wall of the material chamber 21 to fill the gaps generated in the sealing materials around the leak-proof component 2, and fill the seepage gaps from the inside to play a blocking role. The two expansion chambers 26 and the two clean water chambers 23 can play the same mixing role from both sides of the material chamber 21 through cooperation. No matter from which direction the water seeps, the leak-proof component 2 can play a role.

[0049] When one of the outer protective layer 1 is damaged, water will enter the outer protective layer 1 through the damaged position. Since multiple water-blocking components 3 are provided in the outer protective layer 1, and the damaged position is located between two of the water-blocking components 3, water infiltrates into the water-blocking ring 31 through multiple water holes 314 during the infiltration process. The water-blocking powder in the water-blocking ring 31 absorbs water and expands to form a water-blocking material. The water-blocking material opens the fracture of the outer ring 313, so that the outer ring 313 is separated from the two side ring walls 312. After the water-blocking material expands, the outer ring 313 is tightly pressed against the inner wall of the outer protective layer 1, and it also expands horizontally, so that the surrounding of the water-blocking ring 31 is wrapped by the water-blocking material. The water-blocking material can prevent water from continuing to infiltrate the remaining outer protective layers 1, and lock the seepage water between the two water-blocking rings 31. After the water-blocking material expands, the outer protective layer 1 will bulge, which is convenient for the staff to find the damaged position during maintenance.

[0050] In summary, the multi-layer protection of the multiple conductors 9 by the outer filling tape 4, the outer insulating layer 5, the inner protective layer 6, the inner insulating layer 7 and the inner filling strip 8 has a certain moisture-proof effect, especially the inner filling strip 8 provides tight support for the multiple conductors 9, which can prevent the conductors 9 from deforming and also play a certain water-blocking role, thereby improving the moisture-proof performance; at the same time, through the setting of the leak repair component 2, when the plugging material of the cable well cracks and leaks, the multiple stirring drill rods 24 can pierce the side wall of the material chamber 21, and drill and break the clean water in the clean water chamber 23 and the material chamber 21 The plugging agent in the leak-proof component 2 is stirred and mixed to form a foam material with good toughness and elasticity. After the foam material expands, it will squeeze out multiple films 22, seep out from the outer wall of the material chamber 21, fill the gaps in the sealing material around the leak-proof component 2, and fill the water seepage gaps from the inside to play a plugging role; by evenly arranging multiple water-blocking components 3, two of the water-blocking components 3 can intercept the water that penetrates into the outer protective layer 1 in the middle, reducing the water seepage area, and the water-blocking ring 31 will swell the outer protective layer 1 to a certain extent after expansion, so that maintenance personnel can find the damaged section and replace the outer protective layer 1. Example 2

[0051] In actual use, it is found that when the water-blocking material in the water-blocking ring 31 expands, the thickness of the outer structural layer of the wire 9 in this area increases, resulting in poor heat dissipation effect of the wire 9 in this area, and local overheating may occur. Further improvements are made on the basis of the above embodiments.

[0052] On the basis of the above embodiments, please refer to Figure 10 - Figure 12 , a plurality of mounting grooves are formed in the outer ring 313, and heat sinks 32 are respectively rotatably connected in the plurality of mounting grooves of the outer ring 313. One end of the heat sink 32 away from the outer ring 313 is rotatably connected to the inner ring 311. The plurality of heat sinks 32 are arranged in a circumferential array with the center of the inner ring 311 as the center. One end of the heat sink 32 abuts against the inner ring 311, and the other end abuts against the outer ring 313, and the heat sink 32 is inclined. Since the inner ring 311 is in contact with the outer insulating layer, the heat generated by the wire 9 is sequentially transmitted to the inner filling strip 8, the inner insulating layer 7, the inner protective layer 6, and the outer insulating layer 5, so that the inner ring 311 can absorb the heat of the outer insulating layer 5. A plurality of groups of heat conducting sheets 10 are connected through the inner protective layer 6. The plurality of groups of heat conducting sheets 10 are respectively located at the positions where the plurality of water-blocking assemblies 3 are located. A group of heat conducting sheets 10 is provided on the inner side of each water-blocking ring 31. The heat conducting sheets 10 are embedded in the inner protective layer 6. A group of heat conducting sheets 10 has a plurality of them and is arranged in a circumferential array. The heat conduction efficiency of the heat conducting sheets 10 is higher than that of the inner protective layer 6. Where there are heat conducting sheets 10, the heat of the inner insulating layer 5 is transmitted to the outer insulating layer 5 through the heat conducting sheets 10. The outer insulating layer 5 transmits the heat to the inner ring 311. The inner ring 311 transmits the heat to the outer ring 313 through the plurality of heat sinks 32. The outer ring 313 transmits the heat to the outer protective layer 1 to dissipate the heat. After the water-blocking powder in the water-blocking ring 31 swells, the outer ring 313 is lifted. Since one end of the heat sink 32 is connected to the outer ring 313, the outer ring 313 drives one end of the heat sink 32 to be lifted together, so that the heat sink 32 can always keep one end in contact with the inner ring 311 and the other end in contact with the outer ring 313, thereby maintaining the effect of heat transfer.

[0053] In summary, through the cooperation of the heat conducting sheets 10 and the heat sinks 32, in the outer protective layer 1 provided with the water-blocking assembly 3, when the water-blocking material in the water-blocking ring 31 expands, the heat conducting sheets 10 in this area can improve the efficiency of transferring heat to the outer insulating layer 5. The plurality of heat sinks 32 can keep one end in contact with the inner ring 311 and the other end in contact with the outer ring 313 before and after expansion, so that the plurality of heat sinks 32 absorb the heat transferred from the outer insulating layer 5 to the inner ring 311 and transfer it to the outer ring 313, and finally transfer it to the outer protective layer 1 through the outer ring 313 to dissipate, achieving a good heat dissipation effect and avoiding the influence of the expansion of the water-blocking material on the heat dissipation effect of this area.

[0054] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A buried moisture-proof cable, comprising an outer protective layer (1), characterized in that, The inner wall of the outer protective layer (1) is wound with an outer filling tape (4). The inner wall of the outer filling tape (4) is sleeved with an outer insulating layer (5). The inner wall of the outer insulating layer (5) is sleeved with an inner protective layer (6). The inner wall of the inner protective layer (6) is sleeved with an inner insulating layer (7). The inner wall of the inner insulating layer (7) is sleeved with an inner filling strip (8). The inner wall of the inner filling strip (8) is sleeved with a plurality of wires (9). It further includes a leak repair component (2). The leak repair component (2) includes a material chamber (21), two water chambers (23), and two expansion chambers (26). There is clear water in the water chamber (23). There is a leak stopper in the material chamber (21), which is used to repair the water seepage at the cable well connection port by mixing the clear water and the leak stopper and then extruding them. A water blocking component (3). The water blocking component (3) includes a water blocking ring (31). The water blocking ring (31) is connected to the outer wall of the outer insulating layer (5). There is water blocking powder inside the water blocking ring (31), which is used to block the water path inside the outer protective layer (1) based on the principle that the water blocking powder expands when encountering water. The material chamber (21), the two water chambers (23), and the two expansion chambers (26) are all hollow and annularly arranged. The material chamber (21), the two water chambers (23), and the two expansion chambers (26) are all sleeved on the outer wall of the outer protective layer (1). The two water chambers (23) are respectively connected to both ends of the material chamber (21). The two expansion chambers (26) are respectively connected to one end of the two water chambers (23) away from the material chamber (21). An expansion ring (28) is arranged inside the expansion chamber (26). The expansion ring (28) is made of a material that expands when encountering water. A push ring (27) abuts against one side of the expansion ring (28) close to the water chamber (23). A plurality of square grooves (29) are opened at one end of the expansion chamber (26) away from the water chamber (23). A check valve plate (210) is rotatably installed in the square groove (29). There is a gap between the check valve plate (210) and the square groove (29). The check valve plate (210) abuts against one side of the expansion ring (28) away from the water chamber (23). A plurality of stirring drill rods (24) are arranged inside the water chamber (23). A conical head is arranged at the right end of the stirring drill rod (24). A plurality of stirring blades are arranged on the outer wall of the right half section of the stirring drill rod (24). A threaded groove (25) is arranged on the outer wall of the left half section of the stirring drill rod (24). A plurality of threaded holes are opened on the side wall of the water chamber (23). The threaded grooves (25) of the plurality of stirring drill rods (24) are respectively threadedly connected to the plurality of threaded holes of the water chamber (23).

2. The buried moisture-proof cable according to claim 1, wherein: A smooth convex block is arranged at the left end of the stirring drill rod (24). The side of the push ring (27) close to the water chamber (23) abuts against the convex blocks of the plurality of stirring drill rods (24).

3. The buried moisture-proof cable according to claim 2, wherein: The side walls on the left and right sides of the material chamber (21) are made of fragile materials. The stirring drill rod (24) contacts the side wall of the material chamber (21) during movement. A plurality of thin films (22) are arranged on the outer wall of the material chamber (21).

4. The buried moisture-proof cable according to claim 1, characterized in that: The water-blocking ring (31) is divided into an inner ring (311), two side ring walls (312) and an outer ring (313). The inner wall of the inner ring (311) is connected to the outer wall of the outer insulation layer (5). The outer wall of the outer ring (313) is in contact with the inner wall of the outer protective layer (1). The two side ring walls (312) are connected between the inner ring (311) and the outer ring (313). A plurality of breaks are provided on the outer ring (313), and a plurality of water holes (314) are provided on the side ring walls (312).

5. The buried moisture-proof cable according to claim 4, characterized in that: A plurality of mounting grooves are formed in the outer ring (313), and heat dissipation fins (32) are respectively rotatably connected in the plurality of mounting grooves of the outer ring (313). One end of the heat dissipation fin (32) away from the outer ring (313) is rotatably connected to the inner ring (311). The plurality of heat dissipation fins (32) are arranged in a circumferential array with the center of the inner ring (311) as the center.

6. The buried moisture-proof cable according to claim 5, wherein: A plurality of the water-blocking assemblies (3) are provided, and the plurality of water-blocking assemblies (3) are evenly distributed in the outer protective layer (1). A plurality of groups of heat conducting fins (10) are connected through the inner protective layer (6), and the plurality of groups of heat conducting fins (10) are respectively located at the positions where the plurality of water-blocking assemblies (3) are located.

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