A longitudinal water-blocking 35kV and below flame-retardant B1 grade aluminum alloy shielded power cable

Abstract

The utility model discloses a longitudinal water-blocking 35kV and below flame-retardant B1 grade aluminum alloy shielded power cable, comprising a plurality of twisted wire parts, the wire parts comprising a plurality of twisted T-shaped single wires, water-blocking yarns respectively arranged between adjacent T-shaped single wires, shielding layers respectively arranged on the outer sides of each wire part, the shielding layer comprising a water-blocking tape wrapped around the outer surface of the wire part, a flame-retardant fire-insulating layer arranged on the outer side of the shielding layer, the flame-retardant fire-insulating layer comprising at least two fire-insulating layers and oxygen-insulating layers respectively arranged between the fire-insulating layers, which not only increases the water-blocking and waterproof performance of the utility model in a humid environment, but also by arranging at least two fire-insulating layers on the outer side of the shielding layer and arranging oxygen-insulating layers respectively between adjacent fire-insulating layers, thereby forming a flame-retardant fire-insulating layer, which can further improve the fireproof and flame-retardant effect of the utility model, and the utility model belongs to the field of power cables.

Description

Technical Field

[0001] The utility model belongs to the field of power cables, and more specifically relates to a longitudinal water-blocking 35kV and below flame-retardant B1 grade aluminum alloy shielded power cable. Background Art

[0002] A cable is made of one or more mutually insulated conductors and an outer insulating protective layer. It is a wire that transmits electricity or information from one place to another. Each group of conductors is insulated from each other and twisted around a center. The entire outside is covered with a highly insulating covering layer, which has the characteristics of internal power conduction and external insulation.

[0003] At present, due to the relatively harsh environment in the areas where new energy power generation projects such as wind farms and photovoltaic power stations are located, the water-blocking, waterproof and flame-retardant effects of the cables are poor. Moreover, when the wind farm cables are placed on the towers, when the current passing through the conductors is too large, the aluminum conductors heat up and creep, and the cable joints are prone to loosening and deformation, which ultimately leads to poor line contact and causes line and equipment failure accidents. Utility Model Content

[0004] The main purpose of the utility model is to provide a longitudinal water-blocking 35kV and below flame-retardant B1 grade aluminum alloy shielded power cable, which is used to improve water-blocking, waterproof performance and flame-retardant effect.

[0005] In order to achieve the above object, the technical solution of the utility model is:

[0006] A longitudinal water-blocking 35kV and below flame-retardant B1 grade aluminum alloy shielded power cable, comprising a plurality of twisted wire portions, the wire portions comprising a plurality of twisted T-shaped single wires, water-blocking yarns being respectively arranged between adjacent T-shaped single wires, a shielding layer being respectively arranged on the outer side of each of the wire portions, the shielding layer comprising a water-blocking tape wrapped around the outer surface of the wire portion, a flame-retardant fire-insulating layer being arranged on the outer side of the shielding layer, the flame-retardant fire-insulating layer comprising at least two fire-insulating layers and oxygen-insulating layers being respectively arranged between the fire-insulating layers.

[0007] In a specific embodiment of the present invention, the flame retardant fire insulation layer further includes a fire resistant layer, and the fire resistant layer is arranged on the outer side of the fire insulation layer.

[0008] In a specific embodiment of the present invention, the fire-resistant layer is a fire-resistant mica tape material component, and the fire-insulating layer is a low-smoke halogen-free flame-retardant B1 grade fire-insulating material component.

[0009] In a specific embodiment of the present invention, the oxygen-isolating layer is a ceramic polyolefin oxygen-isolating material component.

[0010] In a specific embodiment of the present invention, the shielding layer further comprises a composite layer arranged outside the water blocking tape.

[0011] In a specific embodiment of the present invention, the composite layer is a nano-film composite aluminum alloy strip material component.

[0012] In a specific embodiment of the present invention, the T-shaped single-wire cross-section is fan-shaped.

[0013] In a specific embodiment of the present invention, a protective shell is further provided on the outer side of the flame retardant and fireproof layer.

[0014] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0015] The utility model twists a plurality of T-shaped single wires and arranges water-blocking yarns between adjacent T-shaped single wires to form an electric wire portion, and wraps a water-blocking tape around the outer surface of the electric wire portion, thereby increasing the water-blocking and waterproof performance of the utility model in a humid environment; further, at least two fire-insulating layers are arranged on the outer side of the shielding layer, and oxygen-insulating layers are arranged between adjacent fire-insulating layers, thereby forming a flame-retardant fire-insulating layer, thereby greatly improving the fire-proof and flame-retardant effect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0017] Attached Figure 1 It is an overall cross-sectional view of an embodiment of the utility model;

[0018] Attached Figure 2 A cross-sectional view of the wire portion of an embodiment of the utility model;

[0019] Attached Figure 3 This is a cross-sectional view of a T-shaped single-wire twisted connection according to an embodiment of the utility model;

[0020] Attached Figure 4 For an embodiment of the utility model Figure 3 A magnified image of point A;

[0021] Attached Figure 5 This is a cross-sectional view of a flame retardant and fireproof layer according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0027] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0028] See attached Figure 1 To Attachment Figure 5 As shown, a longitudinal water-blocking 35kV and below flame-retardant B1 grade aluminum alloy shielded power cable comprises three twisted wire parts 1, shielding layers 4 respectively arranged on the outside of each wire part 1, and a flame-retardant fire-insulating layer 2 arranged on the outside of the shielding layer 4, and a scratch-resistant and wear-resistant protective shell 5 is also provided on the outside of the flame-retardant fire-insulating layer 2.

[0029] In one embodiment of the utility model, the wire portion 1 includes a plurality of twisted T-shaped single wires 11 and water-blocking yarns 3 respectively arranged between adjacent T-shaped single wires 11. The cross-section of the T-shaped single wire 11 is fan-shaped. The T-shaped single wire 11 and the water-blocking yarn 3 constitute a longitudinal water-blocking structure of the wire portion 1. The longitudinal water-blocking structure, the twisting of the T-shaped single wire 11 and the water-blocking yarn 3 that swells when exposed to water increase the water-blocking and waterproof performance of the longitudinal water-blocking 35kV and below flame-retardant B1 grade aluminum alloy shielded power cable in a humid environment, which can eliminate the safety hazard of water ingress in a complex cable use environment and increase the service life of the cable.

[0030] In one embodiment of the utility model, the shielding layer 4 includes a water-blocking tape 41 wrapped around the outer surface of the wire portion 1 and a composite layer 42 arranged on the outside of the water-blocking tape 41, wherein the composite layer 42 is a nano-film composite aluminum alloy tape material component, thereby replacing the copper tape used in previous cables and further improving the shielding effect.

[0031] In one embodiment of the utility model, the flame retardant fire insulation layer 2 includes two fire insulation layers 21, an oxygen insulation layer 22 and a fire resistant layer 23 respectively arranged between the fire insulation layers 21, wherein the fire resistant layer 23 is arranged on the outside of the fire insulation layer 21, and the fire insulation layer 21 is a low-smoke halogen-free flame retardant B1 grade fire insulation material component, the oxygen insulation layer 22 is a ceramic polyolefin oxygen insulation material component, and the fire resistant layer 23 is a fire resistant mica tape material component, and thus the above arrangement can further improve the fire retardant effect of the longitudinal water-blocking 35kV and below flame retardant B1 grade aluminum alloy belt shielded power cable.

[0032] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate 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 claims and their equivalents.

Claims

1. A longitudinal water-blocking 35kV and below flame-retardant B1 grade aluminum alloy shielded power cable, characterized in that: The invention comprises a plurality of twisted wire parts (1), wherein the wire parts (1) comprise a plurality of twisted T-shaped single wires (11), water-blocking yarns (3) are respectively arranged between adjacent T-shaped single wires (11), a shielding layer (4) is respectively arranged on the outside of each wire part (1), the shielding layer (4) comprises a water-blocking tape (41) wrapped around the outer surface of the wire part (1), a flame-retardant fire-insulating layer (2) is arranged on the outside of the shielding layer (4), and the flame-retardant fire-insulating layer (2) comprises at least two fire-insulating layers (21) and oxygen-insulating layers (22) respectively arranged between the fire-insulating layers (21).

2. The longitudinal water-blocking 35 kV and below flame-retardant B1 grade aluminum alloy shielded power cable according to claim 1, characterized in that: The flame retardant fire insulation layer (2) further comprises a fire resistant layer (23), wherein the fire resistant layer (23) is arranged on the outer side of the fire insulation layer (21).

3. The longitudinal water-blocking 35 kV and below flame-retardant B1 grade aluminum alloy shielded power cable according to claim 2 is characterized in that: The fire-resistant layer (23) is a fire-resistant mica tape material component, and the fire-insulating layer (21) is a low-smoke, halogen-free, flame-retardant B1-level fire-insulating material component.

4. The longitudinal water-blocking 35 kV and below flame-retardant B1 grade aluminum alloy shielded power cable according to claim 2, characterized in that: The oxygen-isolating layer (22) is a ceramic polyolefin oxygen-isolating material component.

5. The longitudinal water-blocking 35 kV and below flame-retardant B1 grade aluminum alloy shielded power cable according to claim 1, characterized in that: The shielding layer (4) further comprises a composite layer (42) arranged outside the water blocking tape (41).

6. The longitudinal water-blocking 35 kV and below flame-retardant B1 grade aluminum alloy shielded power cable according to claim 5, characterized in that: The composite layer (42) is a nano-film composite aluminum alloy strip material component.

7. The longitudinal water-blocking 35 kV and below flame-retardant B1 grade aluminum alloy shielded power cable according to claim 1, characterized in that: The cross section of the T-shaped single wire (11) is fan-shaped.

8. The longitudinal water-blocking 35 kV and below flame-retardant B1 grade aluminum alloy shielded power cable according to claim 1, characterized in that: A protective shell (5) is also provided on the outer side of the flame retardant and fireproof layer (2).

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