Aluminum core flame-retardant power cable

Abstract

The utility model belongs to the technical field of flame-retardant power cables, and particularly relates to an aluminum core flame-retardant power cable, which comprises a plurality of aluminum cores and an inner support positioned in the center of the cable, the plurality of aluminum cores are uniformly distributed outside the inner support, an outer cover plate is arranged outside the aluminum cores and positioned outside the inner support, and the outer cover plate is provided with a plurality of aluminum cores. The outer cover plates are tightly attached to the aluminum core and the inner support at the same time, the multiple outer cover plates are circumferentially distributed, the outer cover plates are continuously arranged in the axial direction of the cable, and the outer cover plates are in butt joint with or disengaged from the inner support and the aluminum core in the radial direction; firstly, the inner support and the outer cover plate are arranged to wrap the aluminum core, stripping is easier compared with a filling layer, the split outer cover plate is arranged to be matched with the marking groove, rapid stripping of the outer cover plate is facilitated, and wire stripping work during wiring is facilitated while the structural stability is guaranteed; buffering and deformation spaces can be provided for the aluminum core, so that the bending resistance of the cable is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of flame-retardant power cables, in particular to an aluminum core flame-retardant power cable. Background Art

[0002] Flame-retardant power cables refer to power cables that have the ability to prevent or delay the occurrence or spread of flames. They are commonly used in urban underground power grids, lead-out lines of power stations, internal power supplies for industrial and mining enterprises, and underwater transmission lines.

[0003] The aluminum core flame retardant cable includes an aluminum core, a filling layer, a flame retardant layer, a coating layer, etc. from the inside to the outside. During wiring work, all materials except the aluminum core need to be peeled off. The outermost flame retardant layer and the coating layer can be peeled off by ring cutting, but the filling layer covers multiple aluminum cores, and the filling layer needs to be trimmed and peeled off little by little, which is prone to incomplete trimming, and the operation is complicated and inefficient. Aluminum core power cables are generally larger in diameter, and the inside of the cable is a solid structure, resulting in a smaller bending angle, which reduces the wiring flexibility of aluminum core cables;

[0004] In order to solve the above problems, this application proposes an aluminum core flame retardant power cable. Utility Model Content

[0005] The utility model aims to provide an aluminum core flame-retardant power cable, which solves the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses an aluminum core flame-retardant power cable, comprising a plurality of aluminum cores, an inner bracket located at the center of the cable, the plurality of aluminum cores uniformly distributed outside the inner bracket, an outer cover plate arranged outside the aluminum core, the outer cover plate also located outside the inner bracket, the outer cover plate tightly fits with the aluminum core and the inner bracket at the same time, the outer cover plates are a plurality of circumferentially distributed, the outer cover plates are also continuously arranged along the axial direction of the cable, the outer cover plates are connected with or separated from the inner bracket and the aluminum core from the radial direction, a flame-retardant layer is formed outside the outer cover plate, a coating layer is formed outside the flame-retardant layer, and a marking groove for obtaining the position of the connection points of a plurality of outer cover plates inside the inner bracket is opened outside the coating layer.

[0008] Furthermore, the inner bracket is provided with inner arc grooves having the same number as the aluminum core, and the inner bracket is also provided with buffer grooves interconnected with the inner arc grooves. The aluminum core is fitted in the inner arc grooves, and the inner side of the outer cover plate is formed with outer arc grooves, and the aluminum core is also fitted in the positioning strip.

[0009] Furthermore, a plane in contact with each other is provided between the inner bracket and the outer cover plate, a positioning groove is provided on the plane of the inner bracket, and a positioning strip is formed on the plane of the outer arc-shaped groove.

[0010] Furthermore, the positioning grooves are connected to or separated from the positioning strips in the radial direction of the inner bracket, and the positioning grooves are evenly distributed in the radial direction and matched with a plurality of outer cover plates in sequence.

[0011] Furthermore, the cross sections of two axially adjacent outer cover plates fit each other, and the marking groove is arranged on the outer side of the contact surface between the two axially adjacent outer cover plates.

[0012] Furthermore, the inner bracket and the outer cover plate wrap the aluminum core through the inner arc groove and the outer arc groove.

[0013] Furthermore, the inner bracket and the outer parts of the plurality of circumferentially distributed outer cover plates form a complete circle.

[0014] The utility model has the following beneficial effects:

[0015] The utility model replaces the traditional filling layer with the inner bracket and the outer cover plate. Compared with the traditional filling layer, the distribution of multiple aluminum cores will be more uniform and the supporting effect can be guaranteed. The inner bracket and the outer cover plate are split structures, and the outer cover plate is also an independent split structure. After the local flame retardant layer and the coating layer are peeled off, the outer cover plate can be quickly taken out from the inside of the cable. Only the inner bracket needs to be cut to make the aluminum core connected. Compared with the traditional aluminum core cable, the wiring is more convenient;

[0016] The utility model provides a certain deformation space for the aluminum core through the buffer groove, so that the bending angle of the cable is larger and the wiring flexibility is improved. The marking groove is located between two axially adjacent outer cover plates, and the connection between the two outer cover plates can be directly obtained outside the cable, so that the outer cover plate on the side where the connection line needs to be made can be quickly peeled off, which is conducive to the rapid progress of the wiring work.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure from a side view;

[0022] Figure 4 It is a structural schematic diagram of the cross section of the cable of the utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] In the figure: 1. inner bracket; 11. inner arc groove; 12. buffer groove; 13. positioning groove; 2. aluminum core; 3. outer cover plate; 31. outer arc groove; 32. positioning strip; 4. flame retardant layer; 5. coating layer; 51. marking groove. DETAILED DESCRIPTION

[0025] 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.

[0026] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] See also Figure 1-4 As shown, the utility model is an aluminum core flame retardant power cable, comprising a plurality of aluminum cores 2, including an inner bracket 1 located at the center of the cable, a plurality of aluminum cores 2 are evenly distributed outside the inner bracket 1, an outer cover plate 3 is provided outside the aluminum core 2, the outer cover plate 3 is also located outside the inner bracket 1, the outer cover plate 3 is tightly fitted with the aluminum core 2 and the inner bracket 1 at the same time, there are a plurality of outer cover plates 3 distributed circumferentially, the outer cover plates 3 are also continuously arranged along the axial direction of the cable, the outer cover plate 3 is connected or separated from the inner bracket 1 and the aluminum core 2 from the radial direction, a flame retardant layer 4 is formed on the outside of the outer cover plate 3, a coating layer 5 is formed on the outside of the flame retardant layer 4, and a marking groove 51 for knowing the position of the connection of the plurality of outer cover plates 3 inside the inner bracket 1 is provided on the outside of the coating layer 5. In this embodiment, the inner bracket 1 and the outer cover plate 3 can be formed of high-elastic rubber materials, composite materials, etc., and can be adjusted according to the actual use environment.

[0028] Among them, the outer side of the inner bracket 1 is provided with inner arc grooves 11 with the same number as the aluminum core 2, and the inner bracket 1 is also provided with buffer grooves 12 interconnected with the inner arc grooves 11, the aluminum core 2 fits in the inner arc grooves 11, and the inner side of the outer cover plate 3 is formed with outer arc grooves 31, and the aluminum core 2 is also fitted in the positioning strip 32. In this embodiment, the aluminum core 2 is wrapped and supported by the inner bracket 1 and the outer cover plate 3, which can not only stabilize multiple aluminum cores 2 in the cable, but also ensure the structural strength and convenience of wiring.

[0029] Among them, there are contacting planes between the inner bracket 1 and the outer cover plate 3, a positioning groove 13 is opened on the plane of the inner bracket 1, and a positioning strip 32 is formed on the plane of the outer arc groove 31. In this embodiment, the contacting planes are to ensure the supporting effect after the two are in contact, and to ensure the structural strength when multiple outer cover plates 3 are wrapped around the inner bracket 1 and the outside of the aluminum core 2 to avoid the hollowness affecting the cable strength. The outer arc groove 31 and the positioning strip 32 can be rectangular, arc-shaped, wavy, etc., as long as the two are connected and separated from the non-axial direction.

[0030] Among them, the positioning groove 13 and the positioning strip 32 are connected or separated in the radial direction of the inner bracket 1, and the positioning grooves 13 are evenly distributed in the radial direction and cooperate with several outer cover plates 3 in sequence. In this embodiment, by setting radial connection and separation, the outer cover plate 3 can be quickly removed from the inner bracket 1 after the flame retardant layer 4 and the coating layer 5 are peeled off, and at the same time, it can ensure that the outer cover plate 3 at the position where the flame retardant layer 4 and the coating layer 5 are not peeled off is reliably formed in the cable, and the outer cover plate 3 will not be separated from the axial direction, thereby ensuring the reliability of the cable structure.

[0031] Among them, the cross-sections between two axially adjacent outer cover plates 3 fit each other, and the marking groove 51 is opened on the outside of the contact surface between the two axial outer cover plates 3. In this embodiment, the fit between the axial outer cover plates 3 ensures the structural reliability of the cable and avoids local bending of the cable due to excessive gaps between the outer cover plates 3. The marking groove 51 accurately determines the position between the two axial outer cover plates 3, guiding the staff to strip the wire from this position, thereby facilitating the wiring work.

[0032] Among them, the inner bracket 1 and the outer cover plate 3 wrap the aluminum core 2 through the inner arc groove 11 and the outer arc groove 31. In this embodiment, the aluminum core 2 is reliably and evenly supported between the inner bracket 1 and the outer cover plate 3 by wrapping the inner and outer arc grooves to ensure the quality of the cable.

[0033] Among them, the inner bracket 1 and the outer parts of multiple outer cover plates 3 distributed circumferentially form a complete circle. In this embodiment, the circle formed by the inner bracket 1 and the outer ring of the outer cover plate 3 is to facilitate the molding of the flame retardant layer 4. The molded flame retardant layer 4 also connects the combined inner bracket 1 and the outer cover plate 3 as a whole.

[0034] It can be understood that first, the inner bracket 1 and the outer cover plate 3 are wrapped around the outside of the aluminum core 2, which is easier to peel off than the filling layer, and the split outer cover plate 3 is cooperated with the marking groove 51 to facilitate the rapid peeling of the outer cover plate 3, while ensuring the stability of the structure and facilitating the wire stripping work during wiring. Secondly, the buffer groove 12 formed on the inner bracket 1 is interconnected with the inner arc groove 11, which can provide buffering and deformation space for the aluminum core 2, so that the cable has better bending resistance.

[0035] A specific application of this embodiment is: the inner bracket 1, the inner arc groove 11, and the buffer groove 12 are formed by extrusion, and then a positioning groove 13 is opened on the inner bracket 1, the aluminum core 2 is placed in the inner arc groove 11, the outer cover plate 3 is sequentially attached to the outside of the aluminum core 2 and connected to the outer cover plate 3, a flame retardant layer 4 is formed on the outside of the outer cover plate 3, a molded coating layer 5 is formed on the outside of the flame retardant layer 4, and a marking groove 51 is opened on the coating layer 5, and the marking groove 51 is located between two axially adjacent outer cover plates 3;

[0036] When stripping the wire: the flame retardant layer 4 and the coating layer 5 are circumferentially cut and peeled off through the marking groove 51. After peeling, the outer cover plate 3 inside the flame retardant layer 4 and the coating layer 5 is exposed, the outer cover plate 3 is radially detached from the outside of the aluminum core 2, the positioning strip 32 is detached from the inside of the positioning groove 13, and then the inner bracket 1 is trimmed to a suitable length. At this time, multiple aluminum cores 2 are independently exposed at the end of the cable, and then wiring work is carried out through the aluminum core 2.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An aluminum core flame-retardant power cable, comprising a plurality of aluminum cores (2), characterized in that: The invention comprises an inner support (1) located at the center of the cable, a plurality of aluminum cores (2) uniformly distributed outside the inner support (1), an outer cover plate (3) provided outside the aluminum core (2), the outer cover plate (3) also located outside the inner support (1), the outer cover plate (3) tightly fits the aluminum core (2) and the inner support (1), the outer cover plates (3) are multiple and distributed circumferentially, the outer cover plates (3) are continuously arranged along the axial direction of the cable, the outer cover plates (3) are connected to or separated from the inner support (1) and the aluminum core (2) in the radial direction, the outer cover plate (3) is formed with a flame retardant layer (4), the outer cover layer (4) is formed with a coating layer (5), and the coating layer (5) is provided with a marking groove (51) outside for knowing the position of the connection point of the plurality of outer cover plates (3) inside the inner support (1).

2. The aluminum core flame-retardant power cable according to claim 1, characterized in that: The inner bracket (1) is provided with inner arc grooves (11) of the same number as the aluminum core (2) on the outside, and the inner bracket (1) is also provided with buffer grooves (12) communicating with the inner arc grooves (11). The aluminum core (2) fits in the inner arc grooves (11). The inner side of the outer cover plate (3) is formed with outer arc grooves (31), and the aluminum core (2) also fits in the positioning strip (32).

3. The aluminum core flame-retardant power cable according to claim 2, characterized in that: A plane in contact with each other is provided between the inner bracket (1) and the outer cover plate (3), a positioning groove (13) is provided on the plane of the inner bracket (1), and a positioning strip (32) is formed on the plane of the outer arc-shaped groove (31).

4. The aluminum core flame-retardant power cable according to claim 3, characterized in that: The positioning grooves (13) and the positioning strips (32) are connected or disconnected in the radial direction of the inner bracket (1); the positioning grooves (13) are evenly distributed in the radial direction and are matched with a plurality of outer cover plates (3) in sequence.

5. The aluminum core flame-retardant power cable according to claim 1, characterized in that: The cross sections of two axially adjacent outer cover plates (3) fit each other, and the marking groove (51) is provided on the outside of the contact surface between the two axially adjacent outer cover plates (3).

6. The aluminum core flame-retardant power cable according to claim 1, characterized in that: The inner bracket (1) and the outer cover plate (3) wrap the aluminum core (2) via the inner arc-shaped groove (11) and the outer arc-shaped groove (31).

7. The aluminum core flame-retardant power cable according to claim 1, characterized in that: The inner bracket (1) and the outer parts of the plurality of outer cover plates (3) distributed circumferentially form a complete circle.

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