Waterproof cable

Abstract

The utility model discloses a waterproof cable, which comprises conductor units, water-blocking ropes, a waterproof layer and an outer sheath, the water-blocking ropes are filled among the conductor units, a plurality of conductor units are mutually twisted to form a cable core, the waterproof layer and the outer sheath are arranged on the outer layer of the cable core, and the outer sheath is arranged on the outer layer of the waterproof layer. The waterproof layer comprises an aluminum-plastic composite belt, a waterproof layer and an aluminum-plastic composite belt which are sequentially bonded from inside to outside. The waterproof layer adopts a three-layer sandwich structure, compared with a common waterproof layer, the waterproof layer has better ductility and waterproof performance and has good aging resistance, and when the outer layer of the cable is broken and the water pressure is large, the good ductility of the rubber waterproof layer can prevent the inner layer aluminum-plastic composite belt from being permeated, so that the service life of the cable is prolonged, and the service life of the cable is prolonged. And when the outer layer of the cable is broken and the water pressure is large, the high ductility of the waterproof layer can be quickly healed when the cable is greatly deformed, so that the waterproof layer is prevented from leaking.

Description

Technical Field

[0001] This utility model relates to a waterproof cable and belongs to the field of cable manufacturing technology. Background Technology

[0002] Moisture is a significant factor affecting the electrical characteristics of cables. When water enters a cable, it often leads to water treeing and aging under the influence of an electric field, eventually causing cable breakdown and power outages. Conventional cable structures use insulating sheaths and water-blocking yarns as waterproofing measures. This approach is generally only effective in preventing general moisture or short-term water blockage. When cables need to be buried underground for extended periods or laid in underground pipelines, prolonged immersion in water often leads to breakdown. Therefore, a radial water-blocking structure suitable for underwater and humid environments needs to be designed. Utility Model Content

[0003] To address the problems mentioned above in the background art, this utility model provides a waterproof cable.

[0004] The technical solution to achieve the purpose of this utility model is: a waterproof cable, including conductor units, water-blocking ropes, a waterproof layer and an outer sheath. Water-blocking ropes are filled between the conductor units, and multiple conductor units are twisted together to form a cable core. The outer layer of the cable core is provided with a waterproof layer and an outer sheath. The waterproof layer has a three-layer sandwich structure of aluminum-plastic composite tape, waterproof rubber and aluminum-plastic composite tape from the inside to the outside.

[0005] The waterproof layer of this utility model adopts a three-layer sandwich structure. The waterproof rubber has better extensibility and waterproof performance than ordinary waterproof layers and has good anti-aging properties. When the outer layer of the cable is cracked or the water pressure is high, the good extensibility of the rubber waterproof layer can prevent the inner aluminum-plastic composite tape from being penetrated. When the outer layer of the cable is cracked or the water pressure is high, the high extensibility of the waterproof rubber can quickly heal when it undergoes large deformation, thereby avoiding leakage of the waterproof layer.

[0006] As an optimized solution to the above scheme, the conductor unit is obtained by twisting a conductor with water-blocking yarn coated with water-blocking powder and then covering it with a water-blocking tape and an insulation layer. The insulation layer in the above structure is generally made of insulating rubber, which has a certain waterproof effect and can work together with the water-blocking tape to block water. When water passes through the insulation layer and the water-blocking tape, the water-blocking yarn expands rapidly upon contact with the water, which can prevent the water from spreading further along the longitudinal direction of the cable and causing further faults.

[0007] As an optimized solution to the above scheme, the waterproof rubber is a high-elastic rubber asphalt waterproof coating. This material can deform quickly when subjected to stress concentration and compression, with a deformation capacity of 12 times. It also has strong adhesion. When the cable sheath is cracked and the aluminum-plastic composite tape has cracks, it will automatically creep without leakage, which can effectively extend the cable life.

[0008] The adhesion between the waterproof rubber and the aluminum-plastic composite tape and the aluminum-plastic composite tape is ≥1.10Mpa. When the waterproof rubber is applied to the aluminum-plastic composite tape using a spraying process, it can form a tighter bond with the aluminum-plastic composite tape. The sandwich layer forms a stable overall structure, which has better impact resistance when subjected to compression or impact.

[0009] The material has a low-temperature flexibility of ≤-40℃ and a high-temperature resistance of ≥160℃. In the preparation process, there is no need to use expensive lead extrusion equipment. Waterproof rubber can be prepared using only simple spraying equipment. This type of equipment is small in size and can be placed after the aluminum-plastic composite tape is wrapped or longitudinally wrapped for direct spraying. Only room temperature equipment is needed during the spraying process.

[0010] As a preferred embodiment of the above scheme, in order to improve the conductivity of the conductor, the conductor is a Class 5 soft conductor.

[0011] As a preferred embodiment of the above solution, in order to ensure the stretching range of the waterproof rubber, the thickness of the waterproof rubber is 1.0~1.5mm.

[0012] As a preferred option of the above scheme, in order to improve the water resistance of the outer sheath, the outer sheath material is made of polyurethane.

[0013] As a preferred embodiment of the above solution, in order to improve the cable's torsional resistance and prevent deformation from causing damage to the inner layer, an armor layer is also provided outside the waterproof layer.

[0014] As a preferred embodiment of the above scheme, in order to improve the flexibility of the armor layer, the armor layer is a woven galvanized steel wire mesh.

[0015] As a preferred option of the above scheme, in order to make the cable more flexible and easier to lay out, the Class 5 soft conductor material is pure copper, and the structure is made of multiple monofilaments tightly twisted together.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects:

[0017] The waterproof layer of this utility model adopts a three-layer sandwich structure. The waterproof rubber has better extensibility and waterproof performance than ordinary waterproof layers and has good anti-aging properties. When the outer layer of the cable is cracked or the water pressure is high, the good extensibility of the rubber waterproof layer can prevent the inner aluminum-plastic composite tape from being penetrated. When the outer layer of the cable is cracked or the water pressure is high, the high extensibility of the waterproof rubber can quickly heal when it undergoes large deformation, thereby avoiding leakage of the waterproof layer. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] The labels in the attached diagram are:

[0021] Conductor unit 1, conductor 11, water-blocking yarn 12, water-blocking tape 13, insulation layer 14, water-blocking rope 2, waterproof layer 3, first aluminum-plastic composite tape 31, waterproof rubber 32, second aluminum-plastic composite tape 33, outer sheath 4. Detailed Implementation

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this utility model and should not be used to limit the scope of protection of this utility model.

[0028] (Example 1)

[0029] See Figure 1 A waterproof cable includes conductor units 1, water-blocking ropes 2, waterproof layers 3, and outer sheaths 4. The conductor units 1 are filled with water-blocking ropes 2, and multiple conductor units 1 are twisted together to form a cable core. The cable core is provided with a waterproof layer 3 and an outer sheath 4. The waterproof layer 3 has a three-layer sandwich structure from the inside out, consisting of a first aluminum-plastic composite tape 31, a waterproof rubber 32, and a second aluminum-plastic composite tape 33. The waterproof rubber 32 in the three-layer sandwich structure is made of high-elastic rubber asphalt waterproof coating.

[0030] The first aluminum-plastic composite tape 31 is wrapped around the outer layer of the cable core, and the waterproof rubber 32 is coated on the outer layer of the first aluminum-plastic composite tape 31. In terms of material selection, it is necessary to limit the adhesion between the waterproof rubber 32 and the first aluminum-plastic composite tape 31. It is best to select an adhesion strength ≥1.10Mpa. In the preparation, a spraying method is used, and the spray gun pressure is adjusted according to the coating thickness. It is best when the thickness is 1.0~1.5mm. At this time, the expected waterproof effect can be achieved and the raw material cost can be saved.

[0031] The second aluminum-plastic composite tape 33 is longitudinally wrapped or wrapped around the surface, and the second aluminum-plastic composite tape 33 is tightly bonded to the waterproof rubber 32. Specifically, the second aluminum-plastic composite tape 33 can be heated during preparation to improve the bonding effect.

[0032] To improve the waterproof performance of conductor unit 1, conductor unit 1 is obtained by twisting conductor 11 with water-blocking yarn 12 coated with water-blocking powder and then covering it with water-blocking tape 13 and insulation layer 14. Conductor 11 is a Class V conductor, and in a specific paper structure, it can be obtained by twisting multiple copper wires together. Multiple conductors 11 are twisted together with waterproof yarn coated with waterproof powder to obtain the conductor unit core. The outer layer of the conductor unit core is extruded with insulation layer 14.

[0033] The outer sheath material 4 is made of polyurethane. Since polyurethane itself is not strong enough, a galvanized steel wire armor layer can be set inside it. The specific armor thickness can be adjusted according to the hardness of the armor steel wire.

[0034] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waterproof cable, characterized in that: It includes conductor units (1), water-blocking ropes (2), waterproof layers (3) and outer sheaths (4). The conductor units (1) are filled with water-blocking ropes (2). Multiple conductor units (1) are twisted together to form a cable core. The cable core is provided with a waterproof layer (3) and an outer sheath (4). The waterproof layer (3) is a three-layer sandwich structure consisting of a first aluminum-plastic composite strip (31), waterproof rubber (32), and a second aluminum-plastic composite strip (33) from the inside out.

2. The waterproof cable according to claim 1, characterized in that: The conductor unit (1) is obtained by twisting a conductor (11) with a water-blocking yarn (12) coated with water-blocking powder and then covering it with a water-blocking tape (13) and an insulating layer (14).

3. A waterproof cable according to claim 1, characterized in that: The waterproof rubber (32) is a high-elastic rubber asphalt waterproof coating.

4. A waterproof cable according to claim 1, characterized in that: The adhesion between the waterproof rubber (32) and the first aluminum-plastic composite tape (31) and the second aluminum-plastic composite tape (33) is ≥1.10 MPa.

5. A waterproof cable according to claim 2, characterized in that: The conductor (11) is a type 5 soft conductor.

6. A waterproof cable according to claim 2, characterized in that: The thickness of the waterproof rubber (32) is 1.0~1.5mm.

7. A waterproof cable according to claim 2, characterized in that: The outer sheath (4) is made of polyurethane material.

8. A waterproof cable according to claim 1, characterized in that: An armor layer is also provided on the outside of the waterproof layer (3).

9. A waterproof cable according to claim 8, characterized in that: The armor layer is a woven galvanized steel wire mesh.

10. A waterproof cable according to claim 5, characterized in that: The five types of soft conductors are made of pure copper and are structurally composed of multiple monofilaments tightly twisted together.

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