Anti-electromagnetic interference power cable with insulating filler

Abstract

The utility model discloses an anti-electromagnetic interference power cable with insulating filler, which belongs to the technical field of power cables and comprises a plurality of conductors, a shielding layer is arranged on the outer side of each conductor and sequentially provided with an inner shielding layer, an insulating layer and an outer shielding layer from inside to outside, and a filling layer is arranged on the outer side of each shielding layer. The outer side of the filling layer is provided with an armor layer, the outer side of the armor layer is provided with a heat insulation layer, the outer side of the heat insulation layer is provided with a flame-retardant layer, the outer side of the flame-retardant layer is provided with an inner sheath, and the outer side of the inner sheath is provided with an outer sheath. Through the shielding layer formed by weaving steel strips or steel wires, the anti-electromagnetic interference effect of the power cable is further improved, the influence of electromagnetic interference and crosstalk on power transmission is reduced, and the power transmission quality and stability are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to an anti-electromagnetic interference power cable with insulating fillers. Background Art

[0002] Power cables are cables used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supplies for industrial and mining enterprises, and underwater transmission lines across rivers and seas. After searching, a patent document with publication number CN220138002U discloses a cross-linked polyethylene sheathed fire-resistant power cable. The utility model is provided with multiple protections. The corrosion-resistant layer can provide it with corrosion resistance. The heat-cured ceramic mud serves as a ceramic oxygen barrier layer, which has a good crusting effect and provides high temperature resistance. The fire-resistant flame-retardant layer uses halogen-free flame-retardant silicone rubber, which has good self-extinguishing properties when encountering flames and has good fire resistance. At the same time, in the announcement number: CN215988200U, a new type of low-smoke halogen-free flame-retardant and fire-resistant power cable is disclosed, in which the following technical features are specifically disclosed: "The outer wall of the flame retardant layer 9 is bonded with a fire-resistant insulation layer 10, and the fire-resistant insulation layer 10 includes a fire-resistant mica tape sheathing layer and a ceramic fiber insulation layer from the inside to the outside. The fire-resistant mica tape sheathing improves the fire resistance of the power cable, so that the power cable is not prone to spontaneous combustion. The ceramic fiber insulation layer improves the high-temperature insulation ability of the power cable, which can effectively prevent or slow down heat transfer, provide good heat resistance and thermal insulation in a limited space, solve the problem of poor fire resistance and heat insulation of existing power cables, and extend the service life of the power cable. However, when the above-mentioned utility model is used, a single copper wire shielding layer is used to play the role of electromagnetic shielding, resulting in a weak anti-electromagnetic interference effect, so that external electromagnetic interference or crosstalk will still have a certain impact on power transmission, thereby reducing the quality and stability of power transmission. For this reason, it is necessary to propose an anti-electromagnetic interference power cable with insulating fillers. Utility Model Content

[0003] The purpose of the utility model is to provide an electromagnetic interference resistant power cable with an insulating filler to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-electromagnetic interference power cable with insulating fillers, comprising a plurality of conductors, a shielding layer is arranged on the outside of the conductors, the shielding layer is sequentially provided with an inner shielding layer, an insulating layer and an outer shielding layer from the inside to the outside, a filling layer is arranged on the outside of the shielding layer, an armor layer is arranged on the outside of the filling layer, a heat insulation layer is arranged on the outside of the armor layer, a flame retardant layer is arranged on the outside of the heat insulation layer, an inner sheath is arranged on the outside of the flame retardant layer, an outer sheath is arranged on the outside of the inner sheath, and a plurality of equidistantly distributed reinforcing ribs are arranged between the inner sheath and the outer sheath.

[0005] Preferably, the inner shielding layer is configured as a semiconductor shielding layer, the insulating layer is configured as a cross-linked polyethylene insulating layer, and the outer shielding layer is configured as a metal shielding layer.

[0006] Preferably, the filling layer is made of polystyrene foam.

[0007] Preferably, the armor layer is woven from steel strips or steel wires.

[0008] Preferably, the thermal insulation layer is made of ceramic fiber material.

[0009] Preferably, the flame retardant layer is a halogen-free, low-smoke, flame retardant polyolefin material layer.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model is provided with a shielding layer and an armoring layer. The semiconductor shielding layer and the metal shielding layer are used in combination to achieve a double shielding effect, thereby improving the anti-electromagnetic interference effect of the power cable. The armoring layer woven from steel strips or steel wires further improves the anti-electromagnetic interference effect of the power cable, reduces the influence of electromagnetic interference and crosstalk on power transmission, and thereby improves the quality and stability of power transmission.

[0012] 2. In the utility model, the insulating layer is configured as a cross-linked polyethylene insulating layer, which has good electrical insulation properties. The filling layer is made of polystyrene foam, which is a widely used insulating material with good insulation properties. At the same time, it can effectively fill the gaps around the conductor and form a protective film around the conductor, thereby further reducing the risk of fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0015] Figure 3 for Figure 1 Enlarged structural diagram at B in the middle.

[0016] In the figure: 1. conductor; 2. shielding layer; 21. inner shielding layer; 22. insulation layer; 23. outer shielding layer; 3. filling layer; 4. armor layer; 5. insulation layer; 6. flame retardant layer; 7. inner sheath; 8. outer sheath; 9. reinforcement ribs. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Embodiment 1:

[0019] See also Figure 1 and Figure 2 The power cable is a cable used for transmitting and distributing electric energy. It is commonly used in urban underground power grids, power station lead-out lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. The utility model provides a technical solution: an anti-electromagnetic interference power cable with insulating fillers, comprising a plurality of conductors 1, a shielding layer 2 is arranged on the outer side of the conductor 1, and the shielding layer 2 is sequentially provided with an inner shielding layer 21, an insulating layer 22 and an outer shielding layer 23 from the inside to the outside. The inner shielding layer 21 is arranged as a semiconductor shielding layer, which is composed of a semi-conductive material with very low resistivity and thin thickness, and has the function of uniformly forming the electric field on the outer surface of the conductor 1. The insulating layer 22 is arranged as a cross-linked polyethylene insulating layer, which has good electrical insulation performance. The outer shielding layer 23 is arranged as a metal shielding layer. Through the coordinated use of the semiconductor shielding layer and the metal shielding layer, a double shielding effect is achieved, thereby improving the anti-electromagnetic interference effect of the power cable.

[0020] In this embodiment, please refer to Figure 1 A filling layer 3 is arranged on the outside of the shielding layer 2. The filling layer 3 is made of polystyrene foam. Polystyrene foam is a widely used insulating material with good insulating properties. It can effectively fill the gaps around the conductor and form a protective film around the conductor, thereby further reducing the risk of fire.

[0021] In this embodiment, please refer to Figure 1 An armor layer 4 is arranged on the outside of the filling layer 3. The armor layer 4 is woven from steel strips or steel wires, which further improves the anti-electromagnetic interference effect of the power cable, reduces the impact of electromagnetic interference and crosstalk on power transmission, and thus improves the quality and stability of power transmission.

[0022] In this embodiment, please refer to Figure 1 A heat insulation layer 5 is arranged on the outside of the armor layer 4. The heat insulation layer 5 is made of ceramic fiber material, which can effectively prevent or slow down heat transfer.

[0023] In this embodiment, please refer to Figure 1A flame retardant layer 6 is arranged on the outside of the heat insulation layer 5. The flame retardant layer 6 is arranged as a halogen-free low-smoke flame retardant polyolefin material layer, which plays a role in delaying the fire and is not easy to generate toxic smoke and high-concentration smoke.

[0024] Embodiment 2:

[0025] See also Figure 3 This embodiment is different from the first embodiment in that an inner sheath 7 is provided on the outer side of the flame retardant layer 6, an outer sheath 8 is provided on the outer side of the inner sheath 7, and a plurality of equally spaced reinforcing ribs 9 are provided between the inner sheath 7 and the outer sheath 8. The inner sheath 7 and the outer sheath 8 are used in coordination to protect the power cable. The use of the reinforcing ribs 9 can improve the structural strength and tensile strength of the power cable.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic interference resistant power cable with insulating filler, comprising a plurality of conductors (1), characterized in that: A shielding layer (2) is arranged on the outside of the conductor (1), and the shielding layer (2) is provided with an inner shielding layer (21), an insulating layer (22) and an outer shielding layer (23) in sequence from the inside to the outside; a filling layer (3) is arranged on the outside of the shielding layer (2), an armor layer (4) is arranged on the outside of the filling layer (3), a heat insulation layer (5) is arranged on the outside of the armor layer (4), a flame retardant layer (6) is arranged on the outside of the heat insulation layer (5), an inner sheath (7) is arranged on the outside of the flame retardant layer (6), an outer sheath (8) is arranged on the outside of the inner sheath (7), and a plurality of equidistantly distributed reinforcing ribs (9) are arranged between the inner sheath (7) and the outer sheath (8).

2. The electromagnetic interference resistant power cable with insulating filler according to claim 1, characterized in that: The inner shielding layer (21) is configured as a semiconductor shielding layer, the insulating layer (22) is configured as a cross-linked polyethylene insulating layer, and the outer shielding layer (23) is configured as a metal shielding layer.

3. The electromagnetic interference resistant power cable with insulating filler according to claim 1, characterized in that: The filling layer (3) is made of polystyrene foam.

4. The electromagnetic interference resistant power cable with insulating filler according to claim 1, characterized in that: The armor layer (4) is woven from steel strips or steel wires.

5. The electromagnetic interference resistant power cable with insulating filler according to claim 1, characterized in that: The heat insulation layer (5) is made of ceramic fiber material.

6. The electromagnetic interference resistant power cable with insulating filler according to claim 1, characterized in that: The flame retardant layer (6) is configured as a halogen-free, low-smoke, flame retardant polyolefin material layer.

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