Buried moisture-proof cable

Abstract

The invention discloses a buried moisture-proof cable, and relates to the technical field of cables, the buried moisture-proof cable comprises an outer protection layer, the inner wall of the outer protection layer is wound with an outer filling belt, the inner wall of the outer filling belt is sleeved with an outer insulating layer, the inner wall of the outer insulating layer is sleeved with an inner protection layer, the inner wall of the inner protection layer is sleeved with an inner insulating layer, and the inner wall of the inner insulation layer is sleeved with an outer filling belt. The inner wall of the inner insulating layer is sleeved with an inner filling strip, and the inner wall of the inner filling strip is sleeved with a plurality of wires. The device further comprises a leak repairing assembly and a water blocking assembly. Through the arrangement of the leak repairing assembly, when the leak repairing assembly cracks and leaks water in a plugging material of a cable well, the multiple stirring drill rods can pierce the side wall of the material chamber for drilling, clear water in the clear water chamber and a plugging agent in the material chamber are stirred and mixed, and a foaming material with good toughness and elasticity is formed; gaps generated in the plugging material around the leak repairing assembly are filled, and the plugging effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to an underground moisture-proof cable. Background Art

[0002] 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 internal power supply and external insulation, which can ensure the stable transmission of electric energy or information. The structure of the cable usually includes the following parts: conductor, the part that transmits current, usually made of conductive materials such as copper or aluminum; insulation layer, wrapped around the outside of the conductor, used to prevent current leakage and short circuit, common insulation materials include polyethylene, polyvinyl chloride, etc.; inner sheath, sometimes added to the outside of the insulation layer, used to prevent moisture and other impurities from invading the inside of the cable; outer sheath, added to the outside of the inner sheath or insulation layer, used to protect the cable from mechanical damage and environmental influences, common outer sheath materials include polyethylene, polyvinyl chloride, rubber, etc. When the 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 performance of the cable and creates a safety hazard.

[0003] For example, a Chinese patent with application number CN201410404076.0 discloses a cable, including a plurality of insulating cores, which are twisted into a cable, each insulating core including a conductor and an insulating layer, an aluminum sheath is extruded on the outer surface of the cable, and the twisting pitch of the insulating core is the same as the pitch of the aluminum sheath. By directly extruding an aluminum sheath on the outside of the cable, on the one hand, the consumption of filling materials is reduced, and on the other hand, the outer diameter of the aluminum sheath itself is reduced, and the consumables are less. The length of the aluminum sheath is the length of the cable, the linear resistance is small, and the contact between the aluminum sheath and the cable core changes from a linear shape to an arc surface, which is no longer isolated by air, and 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 up when burying cables. When the cable well is set in an area prone to water seepage, it is necessary to seal the connection between the cable and the cable well. However, as the use time increases, the sealed position may crack and seep water, causing groundwater to seep into the cable well along the connection position, making the cable interface in the cable well easily susceptible to moisture and inconvenient for subsequent maintenance.

[0005] Therefore, the present invention proposes an underground moisture-proof cable to solve the above-mentioned problem. Summary of the invention

[0006] The object of the present invention is to provide an underground moisture-proof cable, which solves the technical problems raised in the above-mentioned background technology by cooperating with a leak-proof component and a water-blocking component.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: an underground moisture-proof cable, comprising an outer protective layer, an outer filling tape is wound around 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 insulating layer is sleeved on the inner wall of the inner insulating layer, an inner filling strip is sleeved on the inner wall of the inner filling strip, and a plurality of conductors are sleeved on the inner wall of the inner filling strip; It also includes a leak repair component, which includes a material chamber, two clean water chambers and two expansion chambers. Clean water is provided in the clean water chamber, and a leak-proof agent is provided in the material chamber, which is used to repair the water seepage at the cable well connection port by mixing the clean water and the leak-proof agent and then squeezing them out; The water-blocking assembly comprises a water-blocking ring connected to the outer wall of the outer insulating layer, and water-blocking powder is arranged inside the water-blocking ring for blocking the water path inside the outer protective layer by utilizing the principle that the water-blocking powder expands when it encounters water.

[0008] Preferably, the material chamber, the two clean water chambers and the two expansion chambers are all hollow annular arrangements, and the material chamber, the two clean water chambers and the two expansion chambers are all sleeved on the outer wall of the outer protective layer, the two clean water chambers are respectively connected to the two ends of the material chamber, and the two expansion chambers are respectively connected to the ends of the two clean water chambers away from the material chamber.

[0009] Preferably, an expansion ring is provided inside the expansion chamber, the expansion ring is made of a material that expands when in contact with water, and a push ring is abutted against a side of the expansion ring close to the clean water chamber.

[0010] Preferably, a plurality of square grooves are provided at one end of the expansion chamber away from the clean water chamber, a check plate is rotatably installed in the square groove, a gap is provided between the check plate and the square groove, and the check plate abuts against a side of the expansion ring away from the clean water chamber.

[0011] Preferably, a plurality of stirring drill rods are arranged in the clean water chamber, a cone head is arranged at the right end of the stirring drill rod, a plurality of stirring blades are arranged on the outer wall of the right half of the stirring drill rod, a threaded groove is arranged on the outer wall of the left half of the stirring drill rod, a plurality of threaded holes are opened on the side wall of the clean water chamber, and the threaded grooves of the plurality of stirring drill rods are respectively threadedly connected with the plurality of threaded holes of the clean water chamber.

[0012] Preferably, a smooth bump is provided at the left end of the stirring drill rod, and the side of the push ring close to the clean water chamber abuts against the bumps of the plurality of stirring drill rods.

[0013] Preferably, the side walls on the left and right sides of the material chamber are set to fragile materials, the stirring drill rod contacts the side walls of the material chamber during movement, and the outer wall of the material chamber is provided with multiple films.

[0014] 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 insulating layer, the outer wall of the outer ring is in contact with the inner wall of the outer protective layer, the two side ring walls are connected between the inner ring and the outer ring, the outer ring is provided with a plurality of fractures, and the side ring walls are provided with a plurality of water holes.

[0015] Preferably, the outer ring is provided with a plurality of mounting grooves, and heat sinks are rotatably connected in the plurality of mounting grooves of the outer ring respectively. The end of the heat sink away from the outer ring is rotatably connected to the inner ring, and the plurality of heat sinks are arranged in a circular array with the center of the inner ring as the center.

[0016] Preferably, a plurality of water-blocking components are provided, and the plurality of water-blocking components are evenly distributed in the outer protective layer, and a plurality of groups of heat-conducting plates are connected through the inner protective layer, and the plurality of groups of heat-conducting plates are respectively located at the positions where the plurality of water-blocking components are located.

[0017] The beneficial effects of the present invention are: 1. The present invention provides multi-layer protection for multiple conductors through an outer filling tape, an outer insulating layer, an inner protective layer, an inner insulating layer and an inner filling strip, which plays a certain moisture-proof role. In particular, the inner filling strip provides tight support for the multiple conductors, which can prevent the conductors from deforming while also playing a certain water-blocking role, thereby improving the moisture-proof performance. At the same time, through the arrangement of the leak-proof component, when the sealing material of the cable well cracks and leaks, the leak-proof component can pierce the side wall of the material chamber and drill and break it, and stir and mix the clean water in the clean water chamber and the leak-proof agent in the material chamber to form a foam material with good toughness and elasticity. After the foam material expands, it will squeeze through multiple films and seep out from the outer wall of the material chamber to fill the gaps in the sealing material around the leak-proof component, fill the seepage gaps from the inside, and play a plugging role.

[0018] 2. The present invention evenly arranges multiple water-blocking components so that two of the water-blocking components can intercept water that penetrates into the outer protective layer in the middle, reducing the water seepage area, and the outer protective layer will bulge to a certain extent after the water-blocking ring expands, making it easier for maintenance personnel to find the damaged section and replace the outer protective layer.

[0019] 3. The present invention cooperates with the heat conducting sheet and the heat sink, so that in the outer protective layer provided with the water-blocking component, when the water-blocking material in the water-blocking ring expands, the heat conducting sheet in this area can improve the efficiency of transferring heat to the outer insulating layer, and the multiple heat sinks can keep one end in contact with the inner ring and the other end in contact with the outer ring before and after expansion, so that the multiple heat sinks absorb the heat transferred from the outer insulating layer to the inner ring and transfer it to the outer ring, and finally transfer it to the outer protective layer through the outer ring for dissipation, thereby achieving a good heat dissipation effect and avoiding the expansion of the water-blocking material affecting the heat dissipation effect of this area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of the appearance of an underground moisture-proof cable of the present invention.

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 3 It is a schematic cross-sectional view of the outer protective layer of the present invention.

[0023] Figure 4 It is a schematic cross-sectional view of the inner insulating layer of the present invention.

[0024] Figure 5 The figure is a schematic diagram of the appearance of the leak repairing assembly of the present invention.

[0025] Figure 6 It is a schematic cross-sectional view of the leak repairing assembly of the present invention.

[0026] Figure 7 It is a partial cutaway schematic diagram of the material chamber of the present invention.

[0027] Figure 8 It is a partial cutaway schematic diagram of the clean water chamber of the present invention.

[0028] Fig. 9 It is a partial cutaway schematic diagram of the expansion chamber of the present invention.

[0029] Fig.10 It is a schematic diagram of the water blocking component of the present invention.

[0030] Fig.11 It is a partial cutaway schematic diagram of the inner protective layer of the present invention.

[0031] Fig.12 It is a partial cutaway schematic diagram of the water blocking ring of the present invention.

[0032] The accompanying drawings are marked as follows: 1. Outer protective layer; 4. Outer filling strip; 5. Outer insulation layer; 6. Inner protective layer; 7. Inner insulation layer; 8. Inner filling strip; 9. Wire; 10. Thermal conductive sheet; 2. Leakage repair assembly; 21. Material chamber; 22. Film; 23. Clean water chamber; 24. Stirring drill rod; 25. Thread groove; 26. Expansion chamber; 27. Push ring; 28. Expansion ring; 29. ​​Square groove; 210. Check plate; 3. Water blocking assembly; 31. Water blocking ring; 311. Inner ring; 312. Side ring wall; 313. Outer ring; 314. Water hole; 32. Heat sink. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. Example 1

[0034] During use, it was 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 will be sealed, as the use time increases, the sealed position will crack and seep water, causing groundwater to seep into the cable well along the connection position, causing the cable interface in the cable well to be easily affected by moisture and inconvenient for subsequent maintenance. This embodiment is specially invented to solve the above problems.

[0035] See also Figure 1 - Figure 4 An underground moisture-proof cable according to an embodiment of the present invention comprises 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 insulating layer 5, an inner protective layer 6 is sleeved on the inner wall of the inner protective layer 6, an inner insulating layer 7 is sleeved on the inner wall of the inner insulating layer 7, an inner filling strip 8 is sleeved on the inner wall of the inner insulating layer 7, and a plurality of conductors 9 are sleeved on the inner wall of the inner filling strip 8; further comprising a leak-proof component 2 and a water-blocking component 3, the inner filling strip 8 is in close contact with the plurality of conductors 9, so that the inner filling strip 8 plays a certain supporting role and a certain water-blocking role for the plurality of conductors 9, and when water seeps into the inner insulating layer 7, the inner filling strip 8 can block the forward route of the water seepage and reduce the scope of the water seepage.

[0036] See also Figure 5 - Figure 6 The leak-proof component 2 includes a material chamber 21, two clean water chambers 23 and two expansion chambers 26. Clean water is provided in the clean water chamber 23, and a leak-proof agent is provided in the material chamber 21, which is used to repair the water seepage of the cable well connection port by mixing the clean water and the leak-proof agent and then squeezing them out; the material chamber 21, the two clean water chambers 23 and the two expansion chambers 26 are all hollow annular arrangements, and the material chamber 21, the two clean water chambers 23 and the two expansion chambers 26 are all sleeved on the outer wall of the outer protective layer 1, the two clean water chambers 23 are respectively connected to the two ends of the material chamber 21, and the two expansion chambers 26 are respectively connected to one end of the two clean water chambers 23 away from the material chamber 21, and the material chamber 21, the two clean water chambers 23 and the two expansion chambers 26 form a whole, and its appearance is similar to a hollow column. The leak-proof component 2 is arranged in the wall panel of the cable well. After the cable connection construction is completed, when the interface of the cable well wall panel is blocked, the leak-proof component 2 is wrapped in the interface of the wall panel using the blocking material.

[0037] See also Figure 7 - Fig. 9 An expansion ring 28 is provided inside the expansion chamber 26. The expansion ring 28 is made of a material that expands when in contact with water. A push ring 27 is abutted on the side of the expansion ring 28 close to the clean water chamber 23. A plurality of square grooves 29 are provided at one end of the expansion chamber 26 away from the clean water chamber 23. A check plate 210 is rotatably installed in the square groove 29. There is a gap between the check plate 210 and the square groove 29. When water seeps from the interface of the cable well, water seeps into the expansion chamber 26 through the gap between the plurality of square grooves 29 and the check plate 210. The check plate 210 abuts on the side of the expansion ring 28 away from the clean water chamber 23. The expansion ring 28 expands after absorbing the seepage water. After the expansion ring 28 expands, it extends to the left and right sides. After the expansion ring 28 is fully expanded, the plurality of check plates 210 are abutted 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 toward the clean water chamber 23.

[0038] See also Figure 6 - Figure 8 A plurality of stirring drill rods 24 are arranged in the clean water chamber 23, a cone 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 of the stirring drill rod 24, a threaded groove 25 is arranged on the outer wall of the left half of the stirring drill rod 24, a plurality of threaded holes are opened on the side wall of the clean water chamber 23, and the threaded grooves 25 of the plurality of stirring drill rods 24 are respectively threadedly connected with the plurality of threaded holes of the clean water chamber 23, and the stirring drill rod 24 can rotate when it moves through the cooperation of the threaded grooves 25 and the threaded holes of the clean water chamber 23, a smooth convex block is arranged at the left end of the stirring drill rod 24, and a push ring 27 is close to the side of the clean water chamber 23 and abuts against the convex blocks of the plurality of stirring drill rods 24, and the smooth convex block can rotate on the push ring 27, and when the push ring 27 moves, the plurality of stirring drill rods 24 are pushed toward the clean water chamber 23 through the plurality of push rings 27 The stirring drill rod 24 contacts the side walls of the material chamber 21 during movement, and the stirring drill rod 24 uses the cone head to drill and break the side walls of the material chamber 21 during movement and rotation, 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. The outer wall of the material chamber 21 is provided with multiple films 22. After the foaming material expands, it will squeeze through the multiple films 22 and seep out from the outer wall of the material chamber 21 to fill the gaps in the sealing material around the leak-proof component, and fill the water seepage gaps from the inside to play a sealing role.

[0039] See also Fig.10 - Fig.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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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

[0045] 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 of the wire 9 in this area, and local overheating may occur. Further improvements are made on the basis of the above embodiment.

[0046] Based on the above examples, please refer to Fig.10 - Fig.12 The outer ring 313 is provided with a plurality of mounting grooves, and heat sinks 32 are rotatably connected in the plurality of mounting grooves of the outer ring 313, and one end of the heat sink 32 away from the outer ring 313 is rotatably connected to the inner ring 311, and the plurality of heat sinks 32 are arranged in a circular array with the center of the inner ring 311 as the center, and 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 arranged obliquely. Since the inner ring 311 is in contact with the outer insulating layer, the heat generated by the wire 9 is sequentially transferred 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, and the inner protective layer 6 is penetrated and connected with a plurality of groups of heat conductive sheets 10, and the plurality of groups of heat conductive sheets 10 are respectively located at the positions where the plurality of water blocking components 3 are located, and a group of heat conductive sheets 10 is arranged on the inner side of each water blocking ring 31, and the heat conductive sheets 10 are respectively located at the positions where the plurality of water blocking components 3 are located. The heat sheet 10 is embedded and installed on the inner protective layer 6. A group of heat conducting sheets 10 is provided with multiple and arranged in a circumferential array. The heat conducting efficiency of the heat conducting sheets 10 is higher than that of the inner protective layer 6. Where the heat conducting sheets 10 are provided, the heat of the inner insulating layer 5 is transferred to the outer insulating layer 5 through the heat conducting sheets 10. The outer insulating layer 5 transfers the heat to the inner ring 311. The inner ring 311 transfers the heat to the outer ring 313 through multiple heat sinks 32. The outer ring 313 transfers the heat to the outer protective layer 1 to dissipate the heat. After the water-blocking powder in the water-blocking ring 31 expands when it encounters water, the outer ring 313 is lifted up. Since one end of the heat sink 32 is connected to the outer ring 313, the outer ring 313 is lifted up together with one end of the heat sink 32, 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.

[0047] In summary, through the cooperation of the thermal conductive sheet 10 and the heat sink 32, when the water-blocking material in the water-blocking ring 31 expands, the thermal conductive sheet 10 in this area can improve the efficiency of transferring heat to the outer insulating layer 5, and the multiple 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 multiple 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 for dissipation, thereby achieving a good heat dissipation effect and avoiding the expansion of the water-blocking material affecting the heat dissipation effect of this area.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An underground moisture-proof cable, comprising an outer protective layer (1), characterized in that: The inner wall of the outer protective layer (1) is wrapped 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), and the inner wall of the inner filling strip (8) is sleeved with a plurality of conductors (9); It also comprises a leak repair component (2), the leak repair component (2) comprising a material chamber (21), two clean water chambers (23) and two expansion chambers (26), the clean water chamber (23) being provided with clean water, the material chamber (21) being provided with a leak repair agent, and being used to repair the water seepage at the cable well connection port by mixing the clean water and the leak repair agent and then squeezing them out; A water-blocking assembly (3), the water-blocking assembly (3) comprising a water-blocking ring (31), the water-blocking ring (31) being connected to the outer wall of the outer insulating layer (5), the water-blocking ring (31) being provided with water-blocking powder inside the water-blocking ring (31) for blocking the water path inside the outer protective layer (1) by utilizing the principle that the water-blocking powder expands when in contact with water.

2. The underground moisture-proof cable according to claim 1, characterized in that: The material chamber (21), the two clean water chambers (23) and the two expansion chambers (26) are all hollow annular arrangements. The material chamber (21), the two clean water chambers (23) and the two expansion chambers (26) are all sleeved on the outer wall of the outer protective layer (1). The two clean water chambers (23) are respectively connected to the two ends of the material chamber (21), and the two expansion chambers (26) are respectively connected to one end of the two clean water chambers (23) away from the material chamber (21).

3. The underground moisture-proof cable according to claim 1, characterized in that: An expansion ring (28) is arranged inside the expansion chamber (26). The expansion ring (28) is made of a material that expands when in contact with water. A push ring (27) is abutted against a side of the expansion ring (28) close to the clean water chamber (23).

4. The underground moisture-proof cable according to claim 3, characterized in that: A plurality of square grooves (29) are formed at one end of the expansion chamber (26) away from the clean water chamber (23), and a non-return plate (210) is rotatably mounted in the square groove (29). A gap is provided between the non-return plate (210) and the square groove (29), and the non-return plate (210) abuts against a side of the expansion ring (28) away from the clean water chamber (23).

5. The underground moisture-proof cable according to claim 4, characterized in that: A plurality of stirring drill rods (24) are arranged in the clean water chamber (23); a cone 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 of the stirring drill rod (24); a thread groove (25) is arranged on the outer wall of the left half of the stirring drill rod (24); a plurality of threaded holes are opened on the side wall of the clean water chamber (23); and the thread grooves (25) of the plurality of stirring drill rods (24) are respectively threadedly connected to the plurality of threaded holes of the clean water chamber (23).

6. The underground moisture-proof cable according to claim 5, characterized in that: A smooth bump is provided at the left end of the stirring drill rod (24), and the push ring (27) is in contact with the bumps of the plurality of stirring drill rods (24) on one side close to the clean water chamber (23).

7. The underground moisture-proof cable according to claim 6, characterized in that: The side walls on the left and right sides of the material chamber (21) are provided with fragile materials, the stirring drill rod (24) contacts the side walls of the material chamber (21) during movement, and the outer wall of the material chamber (21) is provided with a plurality of films (22).

8. The underground 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 insulating 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 fractures are provided on the outer ring (313); and a plurality of water holes (314) are provided on the side ring walls (312).

9. The underground moisture-proof cable according to claim 8, characterized in that: The outer ring (313) is provided with a plurality of mounting grooves, and heat sinks (32) are rotatably connected in the plurality of mounting grooves of the outer ring (313), and one end of the heat sink (32) away from the outer ring (313) is rotatably connected to the inner ring (311), and the plurality of heat sinks (32) are arranged in a circular array with the center of the inner ring (311) as the center.

10. The underground moisture-proof cable according to claim 9, characterized in that: A plurality of the water-blocking components (3) are provided, and the plurality of the water-blocking components (3) are evenly distributed in the outer protective layer (1). A plurality of groups of heat-conducting sheets (10) are connected through the inner protective layer (6), and the plurality of groups of heat-conducting sheets (10) are respectively located at the positions where the plurality of water-blocking components (3) are located.

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