A waterproof cable

Abstract

The utility model discloses a waterproof cable, including electric wire and shielding layer, the shielding layer is wrapped in electric wire outside, at least one side of the outside and the inside of shielding layer is laid with water -resistant layer, and water -resistant layer is formed by inside water -resistant band, water -absorbing layer and outside water -resistant band from inside to outside in proper order, water -absorbing layer contains fibrous reinforcing filler and inorganic water -absorbing material that can swell and form water -resistant gel when meeting water, the fibrous reinforcing filler forms support framework, and the inorganic water -absorbing material expands and fills the skeleton gap and forms water -resistant gel after meeting water, and the waterproof cable, the double water -resistant layer of inside and outside of shielding layer is provided, and the porous support framework formed by combining fibrous reinforcing filler and the water -resistant gel formed by inorganic water -absorbing material swelling when meeting water, greatly promote waterproof performance, and the gel's tear resistance and the anti -scouring ability of fibre skeleton are also enhanced, can adapt to the dynamic water environment such as seabed, effectively prevents water penetration and influences power transmission.

Description

Technical Field

[0001] This utility model relates to the field of electrical components technology, and in particular to a waterproof cable. Background Technology

[0002] Cables are insulated conductors consisting of one or more mutually insulated conductive cores enclosed in a sealed sheath. They are mainly used for transmitting electrical energy, signals, or converting electromagnetic energy and are widely used in fields such as power, communication, and electronic equipment.

[0003] In the field of power transmission, especially in special environments such as the seabed and damp underground, the waterproof performance and structural stability of cables directly affect their service life and transmission reliability. Current technologies often employ a single water-blocking layer or simple absorbent material filling for water-blocking designs, which have the following shortcomings: Firstly, traditional water-blocking layers lack effective support structures. When exposed to water, the absorbent material expands and is easily damaged by water flow or cable deformation, leading to a decrease in water-blocking effectiveness. This is especially problematic in dynamic water environments such as the seabed, where the continuous impact of high-pressure water flow can easily destroy the integrity of the water-blocking layer, causing moisture to penetrate into the wire and affecting power transmission safety. Secondly, the bonding stability between the absorbent material and surrounding components in ordinary water-blocking structures is insufficient. During long-term use or frequent deformation, gaps or delamination can easily occur, further weakening the waterproofing capability.

[0004] Therefore, there is an urgent need for a cable that can maintain stable waterproof performance in dynamic water environments and whose structural strength is adapted to complex working conditions. Thus, a waterproof cable is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to propose a waterproof cable to solve the problem of weak resistance to damage caused by the lack of supporting structure in the water-blocking layer.

[0006] To achieve this objective, the present invention adopts the following technical solution: A waterproof cable includes an electric wire and a shielding layer; the shielding layer is wrapped around the outside of the electric wire; a water-blocking layer is provided on at least one of the outer and inner sides of the shielding layer, the water-blocking layer being formed by an inner water-blocking strip, a water-absorbing layer, and an outer water-blocking strip wrapped sequentially from the inside to the outside; the water-absorbing layer comprises fibrous reinforcing filler and an inorganic water-absorbing material that expands upon contact with water to form a water-blocking gel, the fibrous reinforcing filler forming a supporting skeleton, and the inorganic water-absorbing material expanding upon contact with water to fill the gaps in the skeleton and form a water-blocking gel.

[0007] Optionally, a water-blocking layer is provided on both the outer and inner sides of the shielding layer.

[0008] Optionally, an outer sheath layer is laid on the outside of the outer water-blocking strip of the outermost water-blocking layer.

[0009] Optionally, an isolation layer is provided between the outer water-blocking strip of the water-blocking layer outside the shielding layer and the outer sheath layer.

[0010] Optionally, the fibrous reinforcing filler is one or more of polyester staple fibers, polypropylene fibers, or nylon fibers.

[0011] Optionally, the inorganic water-absorbing material is one or more of sodium-based bentonite, sodium-modified calcium-based bentonite, or lithium montmorillonite.

[0012] Optionally, the wire includes a core wire and an insulation layer, the insulation layer covering the core wire, and the insulation layer is made of fluoroplastic.

[0013] Optionally, there are multiple wires, one of which is located at the center of the cavity formed by the shielding layer and is referred to as the central wire. The remaining wires are side wires. The side wires are arranged around the central wire and are mutually abutting each other. The outer side of the side wire abuts the inner side of the inner water-blocking strip. The gap formed between the inner water-blocking strip and any two adjacent side wires is filled with a gap-filling line.

[0014] Optionally, the gap-filling line is cotton thread.

[0015] Optionally, the shielding layer is composed of at least two layers of woven mesh, the woven mesh being made of aluminum and having a weaving density of at least 95%.

[0016] Compared to existing technologies, the advantages of this invention are as follows: A double-layered water-blocking layer is set on both the inner and outer sides of the shielding layer. Combined with a porous support skeleton formed by fibrous reinforcing fillers and a water-blocking gel formed by the expansion of inorganic water-absorbing materials upon contact with water, the waterproof performance is significantly improved. The fibrous skeleton also enhances the tear resistance and erosion resistance of the gel, enabling it to adapt to dynamic water environments such as the seabed and effectively preventing water penetration from affecting power transmission. Multiple wires are distributed around the central wire, with cotton thread filling the gaps, enhancing the structural stability of the multi-core cable, reducing component friction, improving deformation adaptability, and assisting in water blocking. Furthermore, cotton thread is low-cost, easy to process, and suitable for most conventional multi-core scenarios. A non-woven fabric isolation layer between the outermost water-blocking strip and the outer sheath layer reduces interlayer friction, blocks water and oxygen penetration, buffers the molding pressure of the outer sheath layer, extends the lifespan of the water-blocking layer, and improves structural stability and interlayer compatibility. Moreover, the non-woven fabric is flexible, low-cost, and easy to process, making it suitable for most general-purpose scenarios. Attached Figure Description

[0017] The accompanying drawings further illustrate the present invention, but the content of the drawings does not constitute any limitation on the present invention.

[0018] Figure 1This is a cross-sectional view of the present invention; Figure 2 This is a utility model Figure 1 Enlarged view of point A in the middle.

[0019] In the attached diagram: 1. Wire; 11. Middle wire; 12. Edge wire; 110. Core wire; 120. Insulation layer; 2. Shielding layer; 3. Water-blocking layer; 31. Inner water-blocking tape; 32. Water-absorbing layer; 33. Outer water-blocking tape; 4. Outer sheath layer; 5. Insulation layer; 6. Cotton thread. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0024] In this embodiment, by Figure 1-2 A waterproof cable is provided, comprising a wire 1 and a shielding layer 2. The wire 1 transmits electricity, while the shielding layer 2, which wraps around the wire 1, primarily functions to block external electromagnetic interference and prevent electromagnetic radiation generated inside the cable from leaking out. This ensures that the power transmission process is unaffected by external factors and will not interfere with surrounding electronic equipment.

[0025] In addition, to achieve a good waterproof effect, a water-blocking layer 3 is applied to at least one of the outer and inner sides of the shielding layer 2. This water-blocking layer 3 is formed by wrapping an inner water-blocking tape 31, a water-absorbing layer 32, and an outer water-blocking tape 33 sequentially from the inside out. Its purpose is to prevent moisture from penetrating between the wire 1 and the water-blocking layer 3, and to prevent moisture from contacting the wire 1 and affecting power transmission.

[0026] Specifically, the absorbent layer 32 comprises fibrous reinforcing filler and an inorganic absorbent material that expands upon contact with water to form a water-blocking gel. The fibrous reinforcing filler forms a supporting skeleton, while the inorganic absorbent material expands upon contact with water, filling the gaps in the skeleton and forming a water-blocking gel. The fibrous reinforcing filler can be one of polyester short fibers, polypropylene fibers, or nylon fibers, or a combination of these. These fibrous reinforcing fillers interweave to form a porous supporting skeleton, much like building a stable framework. The inorganic absorbent material can be one of sodium-based bentonite, sodium-modified calcium-based bentonite, or lithium montmorillonite, or a mixture of these. When this inorganic absorbent material encounters moisture, it expands, filling the gaps between the fibrous skeleton to form a water-blocking gel that firmly blocks water. The three-dimensional skeleton formed by the fibers enhances the gel's tear resistance and erosion resistance, preventing high-pressure water flow from damaging the gel structure, making it suitable for dynamic aquatic environments (such as submarine cables subjected to ocean currents).

[0027] It should be noted that the core principle of inorganic water-absorbing materials lies in the fact that these layered silicate mineral lattices contain exchangeable cations (such as Na+). When they encounter water molecules, the water molecules will enter the interlayer through osmosis, causing the interlayer spacing to increase sharply, i.e., "swelling upon contact with water". The volume can expand several to ten times. After absorbing water, it quickly transforms into a viscous gel-like substance, i.e., forming a "water-blocking gel". During the water absorption and swelling process, the gel will strongly fill and block all the pores and gaps in the skeleton composed of fibrous fillers, thereby forming a dense and continuous physical water-blocking barrier inside the water-absorbing layer 32, which greatly improves the water-blocking effect.

[0028] In summary, power is transmitted via wire 1, with shielding layer 2 wrapping around the outside of wire 1 to block external electromagnetic interference and prevent internal electromagnetic radiation leakage, ensuring uninterrupted power transmission without affecting surrounding equipment. Simultaneously, a water-blocking layer 3 is formed on at least one side of the shielding layer 2, consisting of an inner water-blocking tape 31, a water-absorbing layer 32, and an outer water-blocking tape 33, wrapped sequentially from the inside out. The water-absorbing layer 32 contains interwoven fibrous reinforcing fillers such as polyester short fibers to form a porous support skeleton. Inorganic water-absorbing materials such as sodium-based bentonite expand upon contact with water and fill the gaps in the skeleton to form a water-blocking gel. The fiber skeleton enhances the tear resistance and erosion resistance of the gel to adapt to dynamic water environments. The water-blocking layer 3 prevents water from penetrating between wire 1 and the water-blocking layer 3, avoiding interference with power transmission. The beneficial effect of this waterproof cable is that the double water-blocking layer 3 design combined with the fiber-reinforced expanding gel structure significantly improves waterproof performance, especially in dynamic water environments, effectively resisting high-pressure water flow and ensuring waterproof reliability. Meanwhile, the shielding layer 2 ensures the stability of power transmission.

[0029] To further enhance the waterproof performance of the cable, a water-blocking layer 3 is laid on both the outer and inner sides of the shielding layer 2. Compared to laying the water-blocking layer 3 on either the outer or inner side of the shielding layer 2, the double-layer water-blocking layer 3 provides better waterproofing. It is more suitable for complex underwater current environments, such as those with strong currents, while a single-layer water-blocking layer 3 is more suitable for environments with gentle currents and lower waterproofing requirements, such as calm rivers or seabeds with relatively small currents.

[0030] Furthermore, to protect the internal structure of the waterproof cable and further resist the influence of the external environment, in this embodiment, an outer sheath layer 4 is laid outside the outermost water-blocking strip 33 of the outermost water-blocking layer 3. The function of this outer sheath layer 4 is to protect all the internal structures of the waterproof cable, while resisting various influences of the external environment, such as preventing mechanical collisions, resisting wind, sun, rain, seawater corrosion, and erosion. Moreover, the outer sheath layer 4 enhances the environmental adaptability of the waterproof cable, enabling it to work stably in various complex environments, extending its service life and reducing maintenance costs.

[0031] In this design, the inner water-blocking tape 31, the outer water-blocking tape 33, and the outer sheath layer 4 are all preferably made of polyester fiber. Polyester fiber has high mechanical strength and wear resistance, can support the water-blocking layer 3 and prevent the water-absorbing layer 32 from deforming, and is also resistant to chemical corrosion and has good weather resistance, which can extend the cable life. In other embodiments, nylon fiber can also be used to suit frequent bending scenarios; or polypropylene fiber can be used to suit cost-sensitive scenarios. In comparison, the advantage of choosing polyester fiber is that its comprehensive performance is balanced, it is suitable for most conventional scenarios, and the uniform material is easy to process, which is conducive to large-scale application.

[0032] Based on the foregoing, the inner water-blocking tape 31, the outer water-blocking tape 33, and the outer sheath layer 4 are preferably made of polyester fiber. Regardless of the material, if the waterproof cable is used for too long or is frequently subjected to impact, it will naturally age. The continuous impact of water on the waterproof cable will cause it to sway. The inner water-blocking tape 31, the outer water-blocking tape 33, and the outer sheath layer 4 will all show signs of aging, cracking, and fissures. This is the situation mentioned earlier where moisture penetrates between the wire 1 and the water-blocking layer 3.

[0033] Furthermore, considering that when the outermost water-blocking strip 33 of the outermost water-blocking layer 3 is in direct contact with the outer sheath layer 4, it is prone to excessive adhesion or friction damage due to material differences, and that the outer sheath layer 4 may develop micro-cracks due to environmental factors during long-term use, causing moisture and oxygen to penetrate into the water-blocking layer 3, and that the surface condition of the outer water-blocking strip 33 may affect the molding quality of the outer sheath layer 4, therefore, in this embodiment, an isolation layer 5 is provided between the outer water-blocking strip 33 of the water-blocking layer 3 outside the shielding layer 2 and the outer sheath layer 4. The material of the isolation layer 5 is preferably... Non-woven fabric; The non-woven fabric isolation layer 5 has good flexibility and can adapt to the structural shape changes when the cable is bent and stretched, avoiding interlayer tearing. At the same time, it separates the outer water-blocking strip 33 from the outer sheath layer 4 to reduce friction damage, blocks water and oxygen from penetrating through the micro-cracks of the outer sheath layer 4, and the porous structure can buffer the molding pressure of the outer sheath layer 4 to ensure the integrity of the outer water-blocking strip 33. This improves the stability of the cable structure and interlayer compatibility, extends the service life of the water-blocking layer 3, enhances the damage resistance in complex environments, and broadens the applicable scenarios.

[0034] In other embodiments, the insulating layer 5 can also be made of fiberglass cloth or polyester film. Fiberglass cloth is suitable for high-temperature environments, such as metallurgical plants and boiler rooms where temperatures often exceed 80°C, because its high-temperature resistance is superior to that of non-woven fabric, thus preventing the insulating layer 5 from failing at high temperatures. Polyester film is suitable for scenarios requiring high flatness, such as internal wiring in precision instruments, reducing the impact of interlayer protrusions on the overall cable dimensions. In comparison, the insulating layer 5 using non-woven fabric has superior overall performance. On the one hand, the flexibility and cushioning of non-woven fabric are better suited to the dynamic deformation of cables during daily bending and stretching, making it suitable for most general scenarios, such as building wiring and outdoor pipes. On the other hand, its cost is lower than that of fiberglass cloth, and it does not require high-precision bonding equipment during processing, making it easier to process than polyester film. It can reduce production and application costs while ensuring protective effects, making it more conducive to large-scale promotion and use.

[0035] The wire 1 includes a core wire 110 and an insulation layer 120. The core wire 110 is formed by stranding multiple high-purity copper wires. This stranding structure utilizes the excellent conductivity of high-purity copper to ensure efficient power transmission, while also enhancing the overall mechanical strength of the core wire 110, making it less prone to breakage under bending and tensile conditions. The insulation layer 120 wraps around the core wire 110 and is made of fluoroplastic. Fluoroplastic possesses excellent high and low temperature resistance (withstanding a temperature range of -200℃ to 260℃ for extended periods), chemical corrosion resistance (resisting seawater, acid and alkali solutions, etc.), and electrical insulation properties. It is particularly suitable for extreme environments such as the deep sea, effectively isolating the core wire 110 from the external structure. This ensures stable and reliable electrical insulation performance of the core wire 110 under high-voltage, high-humidity, and highly corrosive deep-sea conditions, preventing the risk of short circuits or leakage due to insulation failure.

[0036] Furthermore, considering that a single wire 1 cannot meet the requirements for waterproof cable use, multiple wires 1 are required. With multiple wires 1, gaps will exist between the wires 1 and between the wires 1 and the inner water-blocking strip 31. These gaps will not only cause the internal structure of the cable to become loose, making it easy for the wires 1 to become entangled and displaced during bending, stretching, and other deformation processes, but may also become channels for water penetration, affecting the water-blocking effect. At the same time, the loose structure will reduce the overall mechanical stability of the cable. In order to solve the above problems, in this embodiment, there are multiple wires 1, one of which is located at the center of the cavity formed by the shielding layer 2 and is referred to as the central wire 11. The remaining wires 1 are the side wires 12. The side wires 12 are arranged around the central wire 11, and adjacent wires 1 abut against each other. The outer side of the side wires 12 abuts against the inner side of the inner water-blocking strip 31. The gaps formed between the inner water-blocking strip 31 and any two adjacent side wires 12 are filled with gap filling lines.

[0037] Specifically, gap-filling lines are used to fill the gaps formed between the inner water-blocking strip 31 and any two adjacent side wires 12. After the gap-filling lines fill the gaps, the multiple wires 1 and the inner water-blocking strip 31 form a tight whole. When the cable is bent or stretched, it adjusts synchronously with the structural deformation, avoiding entanglement or displacement of the parts and maintaining a neat and orderly internal structure. The beneficial effects of this structure are that the filling of the gaps enhances the structural stability of the cable with multiple wires 1, reduces frictional damage between the wires 1, improves the cable's adaptability to deformation, and helps to block the water penetration path. Combined with the water-blocking layer 3, it further optimizes the waterproof performance and is suitable for compact layout scenarios with multiple wires 1 inside the cable. Furthermore, considering that waterproof cables are not limited to a specific environment, it is necessary to consider their applicability to various environments, that is, their suitability for comprehensive environmental conditions. Therefore, cotton thread 6 is the preferred choice for filling the gaps. Cotton thread 6 has the best flexibility and adaptability to cable deformation, and can be used in most environments, resulting in relatively good overall performance.

[0038] In other embodiments, nylon fiber can be used as the gap-filling material to suit scenarios requiring high abrasion resistance, such as cables for frequently moving equipment; glass fiber can also be used to fill the gaps, suitable for wiring in high-temperature environments, such as connection wires for metallurgical equipment. The advantage of using cotton thread 6 to fill the gaps is that the flexibility of cotton thread 6 is optimally adapted to cable deformation, and it is low-cost and easy to process. It can maintain structural stability and neatness without increasing the cable's hardness and weight, making it suitable for most conventional multi-wire cable applications, facilitating large-scale production and promotion.

[0039] To achieve the aforementioned goal of blocking external electromagnetic interference and preventing leakage of its own electromagnetic radiation, the shielding layer 2 is composed of at least two layers of aluminum braided mesh, with each layer having a braiding density of at least 95%. The braiding density refers to the percentage of the area covered by the braided wires in the shielding layer relative to the total area of ​​the shielding layer. Simply put, it's the degree to which the braided mesh "covers" the surface of the shielding layer. Furthermore, aluminum is preferably used as the material for the braided mesh. This utilizes aluminum's excellent conductivity to achieve efficient electromagnetic shielding, while its lower density reduces the overall weight of the cable. The at least two-layer structure combined with a high braiding density of at least 95% significantly reduces the mesh gaps, enhancing the ability to block electromagnetic interference through the synergistic effect of multi-layer reflection and absorption. Simultaneously, it effectively suppresses the leakage of internal electromagnetic radiation, ensuring stable power transmission in complex electromagnetic environments and preventing external interference or its own radiation from affecting surrounding equipment.

[0040] In summary, the waterproof cable transmits power through the core wire 110 of the wire 1, the insulation layer 120 ensures electrical insulation, and the shielding layer 2 uses at least two layers of high-density aluminum braided mesh to achieve efficient electromagnetic shielding, blocking internal and external electromagnetic interference and ensuring stable transmission. The water-blocking layers 3 on the inner and outer sides of the shielding layer 2 consist of an inner water-blocking tape 31, a water-absorbing layer 32, and an outer water-blocking tape 33. The fibrous reinforcing filler in the water-absorbing layer 32 forms a skeleton, and the inorganic water-absorbing material swells upon contact with water to form a water-blocking gel. The fiber skeleton enhances the gel's tear resistance and erosion resistance. The double water-blocking layers 3 significantly improve waterproof performance, especially suitable for dynamic water environments. Multiple wires 1 are connected with the middle wire 11 as the core wire. The structure is surrounded by cotton threads 6, which fill the gaps to enhance structural stability, reduce friction, and assist in water blocking. The non-woven fabric isolation layer 5 between the outermost water-blocking layer 3 and the outer sheath layer 4 reduces interlayer friction, blocks water penetration, and extends the life of the water-blocking layer 3. The inner water-blocking strip 31, the outer water-blocking strip 33, and the outer sheath layer 4 are made of polyester fiber, which improves the overall mechanical strength and weather resistance. The outer sheath layer 4 protects the internal structure from external influences. The whole structure achieves stable power transmission in complex electromagnetic environments and dynamic water environments, greatly improves waterproof reliability and structural stability, enhances environmental adaptability, extends service life, and reduces maintenance costs, making it suitable for a variety of complex scenarios.

[0041] In the description of this specification, the references to terms such as "embodiment," "one implementation," "some implementations," "illustrative implementation," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the described implementation or example is included in at least one implementation or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same implementation or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more implementations or examples.

[0042] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A waterproof cable, characterized in that: It includes an electric wire (1) and a shielding layer (2); the shielding layer (2) is wrapped around the outside of the electric wire (1); at least one of the outer and inner sides of the shielding layer (2) is provided with a water-blocking layer (3), the water-blocking layer (3) is formed by an inner water-blocking strip (31), a water-absorbing layer (32) and an outer water-blocking strip (33) wrapped from the inside to the outside; the water-absorbing layer (32) includes fibrous reinforcing filler and an inorganic water-absorbing material that can expand to form a water-blocking gel when it comes into contact with water, the fibrous reinforcing filler forms a supporting skeleton, and the inorganic water-absorbing material expands to fill the gaps in the skeleton and forms a water-blocking gel when it comes into contact with water.

2. The waterproof cable according to claim 1, characterized in that, Water-blocking layers (3) are laid on both the outer and inner sides of the shielding layer (2).

3. A waterproof cable according to claim 2, characterized in that, An outer sheath layer (4) is laid on the outside of the outer water-blocking strip (33) of the outermost water-blocking layer (3).

4. A waterproof cable according to claim 3, characterized in that, An isolation layer (5) is provided between the outer water-blocking strip (33) of the water-blocking layer (3) outside the shielding layer (2) and the outer sheath layer (4).

5. A waterproof cable according to claim 1, characterized in that, The fibrous reinforcing filler is one or more of polyester staple fibers, polypropylene fibers, or nylon fibers.

6. A waterproof cable according to claim 1, characterized in that, The inorganic water-absorbing material is one or more of sodium-based bentonite, sodium-modified calcium-based bentonite, or lithium montmorillonite.

7. A waterproof cable according to claim 1, characterized in that, The wire (1) includes a core wire (110) and an insulation layer (120), the insulation layer (120) wrapping the core wire (110), and the material of the insulation layer (120) is fluoroplastic.

8. A waterproof cable according to claim 1, characterized in that, The number of wires (1) is multiple. One of the wires (1) is located in the center of the cavity formed by the shielding layer (2) and is called the middle wire (11). The remaining wires (1) are side wires (12). The side wires (12) are arranged around the middle wire (11) and adjacent wires (1) abut against each other. The outer side of the side wires (12) abuts against the inner side of the inner water-blocking strip (31). The gap formed between the inner water-blocking strip (31) and any two adjacent side wires (12) is filled with a gap-filling line.

9. A waterproof cable according to claim 8, characterized in that, The gap-filling line is cotton thread (6).

10. A waterproof cable according to claim 1, characterized in that, The shielding layer (2) is composed of at least two layers of woven mesh, the material of which is aluminum, and the weaving density of which is at least 95%.

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