Compact medium-voltage cable

Abstract

A compact medium-voltage cable comprises a conductive core wire, an expanded waterproof layer, a metal shielding wrapping layer, a corrosion-resistant layer and a protective sleeve, the conductive core wire comprises a plurality of conductors twisted together, an inner shielding layer and a rubber insulating layer, the inner shielding layer is arranged outside the conductors twisted together, and the rubber insulating layer is arranged outside the expanded waterproof layer. Conductive filling layers are arranged in gaps formed by twisting the conductors and gaps between the conductors and the inner shielding layer, a rubber insulating layer is arranged outside the inner shielding layer, an expanded water-blocking layer is arranged outside the plurality of conductive wire cores, an outer shielding layer is arranged between the conductive wire cores and the expanded water-blocking layer, and fillers are filled in gaps between the conductive wire cores and the outer shielding layer. And a metal shielding wrapping layer is wrapped outside the expanded waterproof layer. According to the utility model, the conductive filling layer is arranged in the gap of the stranded conductor, and the fireproof mud is filled in the gap between the conductive wire core and the outer shielding layer, so that the structural compactness and the waterproof and fireproof performance of the cable are improved, and the expanded waterproof layer is arranged outside the conductive wire core, so that the waterproof effect and the safety performance are improved, and the cable can better adapt to a humid or high-temperature environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable production technical field especially relates to a compact medium voltage cable. BACKGROUND

[0002] Medium voltage cable refers to the crosslinked polyethylene insulation power cable of rated voltage 3.6 / 6kV~26 / 35kV, and the conductor assembly of the insulation wire core is twisted by several copper wires or aluminum wire conductors, and is usually used for power, communication and related transmission, and the working performance must be ensured stable during work, but the total area of the adjacent conductor twisting gap in the conductor assembly of the commonly used medium voltage cable is large, which is not conducive to the formation of compact structure, and the cable has no water blocking layer, which affects the water blocking performance of the conductor of the medium voltage cable, and the current is easily broken down in the humid environment, and there are safety hazards. SUMMARY

[0003] The utility model aims at solving the insufficient prior art and provides a compact medium voltage cable.

[0004] The utility model discloses a compact medium voltage cable, which comprises a conductive core wire, an expanded water blocking layer, a metal shielding wrapping layer, a corrosion-resistant layer and a protective sleeve.

[0005] A compact medium voltage cable comprises a conductive core wire, an expanded water blocking layer, a metal shielding wrapping layer, a corrosion-resistant layer and a protective sleeve.

[0006] The protective sleeve is a nylon sheath.

[0007] The rubber insulation layer is an irradiation crosslinked polyolefin elastic insulation layer.

[0008] The corrosion-resistant layer is a silicon carbide layer.

[0009] The filler is fireproof mortar.

[0010] The components of the filler are hydrated metal oxides, magnesium hydroxide and aluminum hydroxide.

[0011] The utility model discloses a beneficial effect is: the utility model is provided with conductive filling layer in the gap of stranded conductor, fills the fire clay in the gap between conductive wire core and outer shielding layer, improves the structure compactness and waterproof and fireproof performance of cable, sets up the swelling type water -resisting layer on the outside of conductive wire core, improves waterproof effect and safety performance, can more adapt to humid or high temperature environment. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural schematic diagram of the utility model;

[0013] In the drawing: 1 - conductor;2 - conductive filling layer;3 - inner shielding layer;4 - rubber insulation layer;5 - outer shielding layer;6 - swelling type water -resisting layer;7 - metal shielding wrap layer;8 - corrosion -resistant layer;9 - protective sleeve;10 - filling quality;

[0014] Below will combine the embodiment of the utility model with reference to the drawings and carry out detailed description. SPECIFIC EMBODIMENT

[0015] The utility model will be further explained below in combination with the drawings and examples:

[0016] A compact medium voltage cable, including conductive core wire, swelling type water -resisting layer 6, metal shielding wrap layer 7, corrosion -resistant layer 8 and protective sleeve 9, and the conductive core wire includes a plurality of stranded conductors 1, inner shielding layer 3 and rubber insulation layer 4, and the stranded conductor 1 is provided with inner shielding layer 3 outside, and the conductive filling layer 2 is arranged in the gap of stranded conductor 1 and the gap between conductor 1 and inner shielding layer 3, and the rubber insulation layer 4 is arranged outside inner shielding layer 3, and the swelling type water -resisting layer 6 is arranged outside a plurality of conductive wire cores, and the outer shielding layer 5 is arranged between the conductive wire core and the swelling type water -resisting layer 6, and the gap between the conductive wire core and the outer shielding layer 5 is filled with filling quality 10, and the swelling type water -resisting layer 6 is wrapped with metal shielding wrap layer 7, and the corrosion -resistant layer 8 is extruded on the outer side of metal shielding wrap layer 7, and the protective sleeve 9 is extruded on the outer side of corrosion -resistant layer 8.

[0017] The protective sleeve 9 is a nylon sheath, and the nylon material has good wear resistance.

[0018] The rubber insulation layer 4 is an irradiation crosslinking polyolefin elastic insulation layer.

[0019] The corrosion -resistant layer 8 is a silicon carbide layer, which improves the corrosion resistance of the cable and can better adapt to humid environments.

[0020] The filling quality 10 is fire clay, and the components of the filling quality 10 are hydrated metal oxide, magnesium hydroxide and aluminum hydroxide. The filling quality 10 decomposes into non-combustible metal oxide at high temperature, so that the cable has flame retardance.

[0021] The conductor 1 of the cable is filled with a conductive filling layer of a water-blocking semiconductive compound between the twisted gaps, then an inner shielding layer 3 is arranged outside the twisted conductor 1, then a rubber insulation layer 4 is arranged, the internal structure of the conductive wire core is compact, an outer shielding layer 5 is arranged outside all the conductive wire cores, and a metal shielding wrapping layer 7 is wrapped outside the expanded water-blocking layer 6, the multiple shielding layers improve the shielding effect, prevent breakdown, and improve the safety performance.

[0022] In the description of the utility model, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0023] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0024] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] The utility model has been described above in conjunction with the drawings, and obviously the specific implementation of the utility model is not limited by the above method. Any improvement or direct application to other occasions using the method concept and technical solution of the utility model is within the protection scope of the utility model.

Claims

1. A compact medium voltage cable, characterized in that, It includes conductive core wire, puffed water-blocking layer (6), metal shielding wrapping layer (7), corrosion-resistant layer (8) and protective sleeve (9), the conductive core wire includes several twisted conductors (1), inner shielding layer (3) and rubber insulation layer (4), the inner shielding layer (3) is arranged outside the twisted conductors (1), the gap between the twisted conductors (1) and the gap between the conductors (1) and the inner shielding layer (3) are provided with conductive filler layer (2), the rubber insulation layer (4) is arranged outside the inner shielding layer (3), the puffed water-blocking layer (6) is arranged outside the plurality of conductive wire cores, the outer shielding layer (5) is arranged between the conductive wire core and the puffed water-blocking layer (6), the gap between the conductive wire core and the outer shielding layer (5) is filled with filler (10), the puffed water-blocking layer (6) is wrapped with the metal shielding wrapping layer (7), the corrosion-resistant layer (8) is extruded and packed outside the metal shielding wrapping layer (7), and the protective sleeve (9) is extruded and packed outside the corrosion-resistant layer (8).

2. A compact medium voltage cable according to claim 1, characterized in that The protective sleeve (9) is a nylon sheath.

3. A compact medium voltage cable according to claim 1, characterized in that, The rubber insulation layer (4) is an irradiation crosslinking polyolefin elastic insulation layer.

4. A compact medium voltage cable according to claim 1, characterized in that, The corrosion-resistant layer (8) is a silicon carbide layer.

5. A compact medium voltage cable according to claim 1, characterized in that, The filler (10) is fireproof mortar.

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