A high-strength flame-retardant power cable

Abstract

The utility model belongs to the field of cable technology, specifically a high-strength flame-retardant power cable, including: a cable core and a coating formed by extrusion on its outer side; an outer protective frame for resisting external forces is arranged on the inner side of the coating, and a heat dissipation part for accelerating the dissipation of internal heat is arranged on the outer side of the outer protective frame; a connecting plate for separating the heat generated by adjacent cable cores is arranged on the inner side of the outer protective frame, and a heat collecting pad for absorbing the heat for easy discharge is arranged on the outer side of the cable core, and an inner bracket for installing the connecting plate is arranged on one side of the cable core, and the inner bracket is located at the center of the adjacent cable cores. The utility model can effectively avoid the accumulation of heat between adjacent cable cores inside the cable, and reduce the influence of heat on the cable material by rapid discharge, so that the cable maintains stable flame retardant performance, and secondly, it can be decomposed by built-in components under the action of external forces to prevent direct action on the cable core, thereby ensuring its stable performance and prolonging its service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, in particular to a high-strength flame-retardant power cable. 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. Flame-retardant cables refer to cables that, under specified test conditions, the sample is burned. After the test fire source is removed, the spread of the flame is only within a limited range, and the residual flame or residual burning can be extinguished by itself within a limited time.

[0003] At present, it is found in the actual application of existing flame-retardant power cables that long-term operation of the cables will lead to a steady increase in the temperature of the internal cable core. Under the interaction of the temperatures of adjacent cable cores, the temperature concentration will be aggravated, causing damage to the outer coating material, which is not conducive to maintaining stable flame-retardant performance.

[0004] In order to solve the above problems, this application proposes a high-strength flame-retardant power cable. Utility Model Content

[0005] The purpose of the utility model is to provide a high-strength 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 a high-strength flame-retardant power cable, comprising: a cable core and a coating formed by extrusion on its outer side; an outer protective frame for resisting external forces is arranged on the inner side of the coating layer, and a heat dissipation part for accelerating the dissipation of internal heat is arranged on the outer side of the outer protective frame; a connecting frame plate for separating the heat generated by adjacent cable cores is arranged on the inner side of the outer protective frame, and a heat collecting pad for absorbing heat and facilitating the discharge is arranged on the outer side of the cable core.

[0008] Furthermore, an inner bracket for mounting a connecting plate is provided on one side of the cable core, and the inner bracket is located at a central position of adjacent cable cores.

[0009] Furthermore, protruding side plates are provided at both ends of the outer sides of the connecting frame plate, and the side plates squeeze the outer protective frame to form a limit groove for snap-fit ​​connection.

[0010] Furthermore, an arc-shaped sleeve for mounting a heat collecting pad is provided on the outer side of the cable core, and clamping blocks protruding inwards are provided at both ends of the arc-shaped sleeve.

[0011] Furthermore, the clamping block cooperates with the arc-shaped sleeve to form an arc-shaped side groove.

[0012] Furthermore, a positioning groove for filling by extrusion process is provided inside the heat dissipation part.

[0013] Furthermore, during installation, the heat collecting pad, arc-shaped sleeve and outer protective frame are sequentially laid out through an external winding mechanism to form an assembly with the cable core and the connecting frame plate.

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

[0015] The utility model absorbs heat and then isolates it, and then quickly discharges the heat to the outside under the action of the heat source. Compared with the existing cables, it can avoid the heat interaction between the adjacent cable cores inside, and prevent the situation where the temperature rises and damages the cable structure. At the same time, the stable heat dissipation effect is conducive to maintaining the long-term flame retardant properties of the cable and prolonging its service life.

[0016] The utility model can bear the external force in advance during use by cooperating with , and utilize buffering decomposition to prevent the external force from directly acting on , so as to maintain the stable use performance of the cable under the action of external force and reduce the cable failure rate.

[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 This is a schematic diagram of the cable cross-section structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the partial structure of the cable cross section of the utility model;

[0022] Figure 4 It is a partial enlarged structural schematic diagram of part A 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, cable core; 2, coating layer; 3, outer protective frame; 4, heat dissipation part; 5, inner bracket; 6, connecting plate; 7, side plate; 8, arc sleeve; 9, positioning groove; 10, heat collecting pad; 11, limiting groove; 12, clamping block; 13, side 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 a high-strength flame-retardant power cable, comprising: a cable core 1 and a coating layer 2 formed by extrusion on its outer side;

[0028] An outer protective frame 3 for resisting external forces is arranged on the inner side of the coating layer 2, and a heat dissipation part 4 for accelerating the dissipation of internal heat is arranged on the outer side of the outer protective frame 3;

[0029] The inner side of the outer protective frame 3 is provided with a connecting plate 6 for separating the heat generated by adjacent cable cores 1, and the outer side of the cable core 1 is provided with a heat collecting pad 10 for absorbing the heat and facilitating the discharge;

[0030] The present embodiment provides a flame-retardant cable with a stable structure and capable of preventing aggravation of internal heat interaction. The heat is isolated by the connecting plate 6 so that the heat generated by adjacent cable cores 1 cannot interact, thereby accelerating the discharge of heat through the outer protective frame 3 and the heat dissipation part 4 on its outer side to achieve the heat dissipation effect, which can effectively prevent the internal temperature from rising and damaging the cable material, thereby increasing its service life. Secondly, the outer protective frame 3 can cooperate with the connecting plate 6 to resist external forces, reduce their influence on the cable core 1, and enable the cable core 1 to maintain stable operation quality.

[0031] Among them, an inner bracket 5 for installing a connecting plate 6 is provided on one side of the cable core 1. The inner bracket 5 is located at the center of the adjacent cable core 1. The inner bracket 5 is also used to deform when the external force is transmitted inward to relieve the external force, so as to minimize the impact on the cable core 1, and the inner bracket 5 has elastic reset characteristics after deformation.

[0032] Among them, protruding side plates 7 are arranged at both ends of the outer side of the connecting plate 6, and the side plates 7 squeeze the outer protective frame 3 to form a limit groove 11 for snap-fit ​​connection, and the side plates 7 are used to enhance the resistance effect to external forces.

[0033] The outer side of the cable core 1 is also provided with an arc-shaped sleeve 8 for installing the heat collecting pad 10 , and both ends of the arc-shaped sleeve 8 are provided with clamping blocks 12 protruding inwards.

[0034] The clamping block 12 cooperates with the arc sleeve 8 to form an arc-shaped side groove 13, which is used to limit the heat collecting pad 10 to prevent misalignment and affect the heat collecting effect.

[0035] The heat dissipation part 4 has a positioning groove 9 inside for filling by extrusion process.

[0036] The heat collecting pad 10, the arc-shaped sleeve 8 and the outer protective frame 3 are sequentially laid out through an external winding mechanism during installation to form an assembly with the cable core 1 and the connecting frame plate 6.

[0037] It can be understood that the utility model can effectively avoid heat accumulation between adjacent cable cores 1 inside the cable, and reduce the impact of heat on the cable material by quickly discharging it, so that the cable maintains stable flame retardant properties. Secondly, it can also decompose it through built-in components under the action of external force to prevent direct action on the cable core 1, thereby ensuring its stable performance and increasing its service life.

[0038] A specific application of the operating process of this embodiment is: when in use, the heat collecting pad 10 and the arc sleeve 8 stored in the external winding mechanism are first sequentially sleeved on the outside of the cable core 1, and then when the cable core 1 is transported for the extrusion process, the outer protective frame 3 placed outside is clamped in the transport path in cooperation with the connecting plate 6, and then the inner bracket 5, the arc sleeve 8, the heat collecting pad 10 and the outer protective frame 3 can be fixed to the inside of the cable during the extrusion process to provide stable structural support, and at the same time, the heat collecting pad 10 is used to absorb the heat generated by the cable core 1 and transfer it to the outer protective frame 3, and finally dissipate it outward through the heat dissipation part 4, and at the same time, the connecting plate 6 is used to separate the heat generated by adjacent cable cores 1 so that they cannot interact, thereby greatly reducing the impact of the internal heat of the cable on the cable material and increasing its service life.

[0039] 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.

[0040] 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. A high-strength flame-retardant power cable, characterized in that: include: A cable core (1) and a coating layer (2) formed by extrusion of the outer side thereof; An outer protective frame (3) for resisting external forces is arranged on the inner side of the coating layer (2), and a heat dissipation portion (4) for accelerating the dissipation of internal heat is arranged on the outer side of the outer protective frame (3); A connecting plate (6) is provided on the inner side of the outer protective frame (3) for separating the heat generated by adjacent cable cores (1), and a heat collecting pad (10) is provided on the outer side of the cable core (1) for absorbing the heat and facilitating its discharge.

2. A high-strength flame-retardant power cable according to claim 1, characterized in that: An inner bracket (5) for mounting a connecting plate (6) is provided on one side of the cable core (1), and the inner bracket (5) is located at the center of an adjacent cable core (1).

3. A high-strength flame-retardant power cable according to claim 1, characterized in that: The two outer ends of the connecting frame plate (6) are provided with protruding side plates (7), and the side plates (7) squeeze the outer protective frame (3) to form a limit groove (11) for snap-fit ​​connection.

4. A high-strength flame-retardant power cable according to claim 1, characterized in that: The outer side of the cable core (1) is also provided with an arc-shaped sleeve (8) for mounting a heat collecting pad (10), and both ends of the arc-shaped sleeve (8) are provided with clamping blocks (12) protruding inwards.

5. A high-strength flame-retardant power cable according to claim 4, characterized in that: The clamping block (12) cooperates with the arc-shaped sleeve (8) to form an arc-shaped side groove (13).

6. A high-strength flame-retardant power cable according to claim 1, characterized in that: The heat dissipation portion (4) is provided with a positioning groove (9) used for filling by an extrusion process.

7. The high-strength flame-retardant power cable according to claim 1, characterized in that: During installation, the heat collecting pad (10), the arc-shaped sleeve (8) and the outer protective frame (3) are sequentially laid out through an external winding mechanism to form an assembly with the cable core (1) and the connecting frame plate (6).

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