Waterproof cable structure

Abstract

The utility model relates to the technical field of power cables, and discloses a waterproof cable structure which solves the technical problem of how to enable a cable to have good waterproof performance at present, the waterproof cable structure is composed of a cable main body and a cable connecting body, the cable main body comprises a cable core, a first inner protective sleeve, a first waterproof layer and a first outer protective sleeve, the first waterproof layer structurally comprises a shell, oil injection holes are formed in the two ends of the shell, a waterproof oil film is arranged in the shell through the oil injection holes, the two ends of the cable core extend out of the first inner protective sleeve to form connecting parts, and connecting cavities are formed between the first outer protective sleeve and the first inner protective sleeve and located at the two ends. According to the above technical scheme, the cable is provided with the waterproof layer for waterproofing, and the waterproof layer is not convenient to cut off, and the cable is provided with the cable main body and the cable connecting body, so that the cable can be conveniently dismounted and maintained on the basis of the waterproof performance, and a proper cable length can be selected more flexibly.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, and more specifically, to a waterproof cable structure. Background Art

[0002] Power cables are cables used to transmit and distribute electric energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of power systems, including 1-500kV and above various voltage levels, and various insulation power cables.

[0003] Power cables will inevitably come into contact with water in many usage scenarios. For example, cables exposed to the air will come into contact with water sources in rainy weather, cables buried underground will come into contact with groundwater, and cables directly installed for underwater power transmission in rivers, lakes and seas will come into direct contact with water sources. Therefore, the waterproof performance or water-blocking performance of the cable is particularly important. Utility Model Content

[0004] In response to the technical problem of how to make the cable have good waterproof performance raised in the background technology, the utility model arranges a water-blocking layer for waterproofing. At the same time, since the water-blocking layer is not convenient to cut, the cable is arranged into two parts: a cable main body and a cable connector, which can allow the cable to be conveniently disassembled and repaired while achieving waterproof performance.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A waterproof cable structure is composed of a cable body and a cable connector, wherein the cable body comprises a cable core, a first inner protective sleeve, a first water-blocking layer and a first outer protective sleeve, the structure of the first water-blocking layer comprises an outer shell, oil injection holes are provided at both ends of the outer shell, a water-blocking oil film is provided inside the outer shell through the oil injection holes, both ends of the cable core extend out of the first inner protective sleeve to form a connecting portion, the first water-blocking layer is arranged on the outer periphery of the first inner protective sleeve, the first outer protective sleeve is arranged on the outer periphery of the first water-blocking layer, and a connecting cavity is provided between the first outer protective sleeve and the first inner protective sleeve and at both ends; the cable connector comprises a second inner protective sleeve, a second water-blocking layer and a second outer protective sleeve, the second inner protective sleeve is arranged on the outer periphery of the connecting portion, the second water-blocking layer is arranged on the outer periphery of the second inner protective sleeve and both ends of the second water-blocking layer are installed in the connecting cavity, and the second outer protective sleeve is arranged on the outer periphery of the second water-blocking layer; the second water-blocking layer has the same structure as the first water-blocking layer.

[0007] Through the above technical solution, the utility model sets a water-blocking layer for waterproofing. At the same time, since the water-blocking layer is not easy to cut, the cable is set up as a cable body and a cable connector, which can make the cable easy to disassemble and repair on the basis of waterproof performance. Therefore, when it is necessary to select a suitable length, the cable connector can be used to connect the two sections of the cable body, and the suitable laying length can be selected more flexibly according to the application scenario.

[0008] The utility model further provides that: the connecting portion is used to connect adjacent cable bodies.

[0009] The utility model further provides that: the cable core comprises a core wire and a cable core filling layer, and the cable core filling layer is filled inside the first inner protective sleeve.

[0010] The utility model further provides that: the first inner protective sleeve and the second inner protective sleeve have the same structure and play an insulating role.

[0011] The utility model further provides that: the first outer protective cover and the second outer protective cover have the same structure.

[0012] The utility model further has the following advantages: the outer surface of the first water-blocking layer is provided with a protrusion, the inner surface of the first outer protective sleeve is provided with a groove, and when the first water-blocking layer and the first outer protective sleeve are bonded, the protrusion and the groove are matched and connected.

[0013] The utility model further has the advantage that: the interior of the first outer protective sheath is provided with a shielding layer made of the same material as the cable core conductor.

[0014] Through the above technical solution, a shielding layer made of the same material as the conductor is arranged on the outside of the insulator, so that the influence of the electromagnetic force is absorbed by the shielding layer. Among them, shielding is a commonly used structure to resist external interference. It is an effective anti-interference technology suitable for a wide frequency band. The anti-interference strength depends on the coating rate of the shielding layer. A large number of copper wires (such as yarn for clothes) are used, and the more the number, the stronger the anti-interference ability. However, in order to improve the anti-interference effect, it makes the cable stiff. Therefore, the coverage of the shielding is usually about 70-90%.

[0015] The utility model further has the following advantages: the thickness of the water-blocking oil film is 1 mm-10 mm.

[0016] In summary, the utility model has the following beneficial effects:

[0017] The utility model arranges a water-blocking layer for waterproofing. At the same time, since the water-blocking layer is not convenient to cut, the cable is arranged into two parts, a cable main body and a cable connector, so that the cable can be conveniently disassembled and repaired on the basis of achieving waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the waterproof cable structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection of the waterproof cable structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the end surface structure of the cable body of the utility model.

[0021] Figure numerals: 1, cable core; 1-1, connecting part; 1-2, core wire; 1-3, cable core filling layer; 2, first inner protective cover; 3, first water-blocking layer; 3-1, outer shell; 3-2, oil injection hole; 3-3, water-blocking oil film; 4, first outer protective cover; 5, connecting cavity; 6, second inner protective cover; 7, second water-blocking layer; 8, second outer protective cover. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0023] A waterproof cable structure, combined with Figure 1-Figure 3 As shown, it is composed of a cable body and a cable connector. The cable connector is used to connect two sections of the cable body, so that the appropriate cable body length can be selected according to the application scenario of the power cable, and each section of the cable body can be connected through the cable connector.

[0024] In the technical solution of the utility model, the cable body includes a cable core 1, a first inner protective sleeve 2, a first water-blocking layer 3 and a first outer protective sleeve 4. The structure of the first water-blocking layer 3 includes an outer shell 3-1, and oil injection holes 3-2 are provided at both ends of the outer shell 3-1. A water-blocking oil film 3-3 is provided inside the outer shell 3-1 through the oil injection holes 3-2; the first inner protective sleeve 2 extends out from both ends of the cable core 1 to form a connecting portion 1-1, and the connecting portion 1-1 is actually a part of the cable core 1. The two are integrally formed, the first water-blocking layer 3 is provided on the outer periphery of the first inner protective sleeve 2, the first outer protective sleeve 4 is provided on the outer periphery of the first water-blocking layer 3, and a connecting cavity 5 is provided between the first outer protective sleeve 4 and the first inner protective sleeve 2 and at both ends.

[0025] In the technical solution of the utility model, the cable connector includes a second inner protective sleeve 6, a second water blocking layer 7 and a second outer protective sleeve 8. The second inner protective sleeve 6 is arranged on the outer periphery of the connecting portion 1-1, the second water blocking layer 7 is arranged on the outer periphery of the second inner protective sleeve 6 and both ends of the second water blocking layer 7 are installed in the connecting cavity 5, and the second outer protective sleeve 8 is arranged on the outer periphery of the second water blocking layer 7.

[0026] The second water-blocking layer 7 has the same structure as the first water-blocking layer 3, both of which are provided with a shell 3-1 and an oil injection hole 3-2, and are filled with a layer of water-blocking oil film 3-3, the thickness of which is 1mm-10mm.

[0027] When connecting adjacent cable bodies, the connecting portion 1-1 is used to connect adjacent cable bodies. In addition, the cable core 1 includes a core wire 1-2 and a cable core filling layer 1-3, the cable core filling layer 1-3 is filled inside the first inner protective sheath 2, and the connecting portion 1-1 is the end portion of the core wire 1-2.

[0028] In the embodiment of the utility model, the first inner protective cover 2 and the second inner protective cover 6 have the same structure and play an insulating role. The first outer protective cover 4 and the second outer protective cover 8 have the same structure and play an insulating role and play a preliminary waterproof role.

[0029] In order to achieve a firm connection between the first water-blocking layer 3 and the first outer protective sheath 4, a protrusion is provided on the outer surface of the first water-blocking layer 3, and a groove is provided on the inner surface of the first outer protective sheath 4. When the first water-blocking layer 3 and the first outer protective sheath 4 are bonded, the protrusion and the groove are matched and connected. In addition, a shielding layer made of the same material as the conductor of the cable core 1 is provided inside the first outer protective sheath 4 to increase the overall anti-external interference performance of the power cable, mainly the common mode interference between the line and the ground.

[0030] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A waterproof cable structure, characterized in that: The invention is composed of a cable body and a cable connector, wherein the cable body comprises a cable core (1), a first inner protective sleeve (2), a first water-blocking layer (3) and a first outer protective sleeve (4); the structure of the first water-blocking layer (3) comprises an outer shell (3-1); oil injection holes (3-2) are provided at both ends of the outer shell (3-1); a water-blocking oil film (3-3) is provided inside the outer shell (3-1) through the oil injection holes (3-2); both ends of the cable core (1) extend out of the first inner protective sleeve (2) to form a connecting portion (1-1); the first water-blocking layer (3) is provided on the outer periphery of the first inner protective sleeve (2); the first outer protective sleeve (4) is provided on the outer periphery of the first water-blocking layer (3); The invention relates to a cable connector, wherein the first outer protective sleeve (4) and the first inner protective sleeve (2) are provided with a connecting cavity (5) between the first outer protective sleeve (4) and the first inner protective sleeve (2) and at both ends thereof; the cable connector comprises a second inner protective sleeve (6), a second water-blocking layer (7) and a second outer protective sleeve (8); the second inner protective sleeve (6) is provided at the outer periphery of the connecting portion (1-1); the second water-blocking layer (7) is provided at the outer periphery of the second inner protective sleeve (6) and both ends of the second water-blocking layer (7) are installed in the connecting cavity (5); the second outer protective sleeve (8) is provided at the outer periphery of the second water-blocking layer (7); and the second water-blocking layer (7) has the same structure as the first water-blocking layer (3).

2. A waterproof cable structure according to claim 1, characterized in that: The connecting portion (1-1) is used to connect adjacent cable bodies.

3. A waterproof cable structure according to claim 1, characterized in that: The cable core (1) comprises a core wire (1-2) and a cable core filling layer (1-3), and the cable core filling layer (1-3) is filled inside the first inner protective sheath (2).

4. A waterproof cable structure according to claim 1, characterized in that: The first inner protective sleeve (2) and the second inner protective sleeve (6) have the same structure and play an insulating role.

5. A waterproof cable structure according to claim 1, characterized in that: The first outer protective cover (4) and the second outer protective cover (8) have the same structure.

6. A waterproof cable structure according to claim 5, characterized in that: The first water-blocking layer (3) has a protrusion on its outer surface and the first outer protective sleeve (4) has a groove on its inner surface. When the first water-blocking layer (3) and the first outer protective sleeve (4) are bonded together, the protrusion and the groove are matched and connected.

7. A waterproof cable structure according to claim 5, characterized in that: The first outer protective sheath (4) is provided with a shielding layer made of the same material as the conductor of the cable core (1).

8. A waterproof cable structure according to claim 1, characterized in that: The thickness of the water-blocking oil film (3-3) is 1 mm to 10 mm.

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