Cable protection device

Abstract

A cable protection device comprises a cable main body. A conductor is arranged in the cable main body; an insulating layer is arranged outside the conductor; the upper end of the conductor is provided with a wiring terminal; the upper side of the cable body is provided with a sleeve outside the conductor and the insulating layer. Insulating agent filling liquid is filled between the interior of the sleeve and the insulating layer. A stress cone is arranged between the bottom of the sleeve and the insulating layer; a composite insulating winding tape is arranged between the stress cone and the insulating layer; a sealing flange is arranged between the upper end of the sleeve and the insulating layer; a shielding cover is arranged at the top of the sleeve; a fixed mounting plate is arranged on the lower side of the sleeve; an outer insulating sheath is arranged on the outer side of the sleeve; a plurality of umbrella skirts are arranged on the outer insulating sheath; a plurality of annular walls are arranged on the lower side of the umbrella skirt; the cable main body is provided with a grounding wire extending outwards from the lower side of the fixed mounting plate.

Description

Technical Field

[0001] This utility model belongs to the field of power cable devices, and in particular relates to a cable protection device. Background Technology

[0002] Cable terminations are joints that connect cables to electrical equipment such as transformers and distribution boxes. They are widely used in power transmission and transformation projects. In the construction of 110kV and above civil power transmission and transformation projects, to prevent accidents involving transmission equipment, composite conduit cable terminations should be used for newly built or renovated outdoor cable terminations in densely populated areas or locations with explosion-proof requirements (within 300m). These terminations have better waterproof, stress control, and insulation shielding functions, effectively protecting cable lines from the influence of the external environment, preventing electrical breakdown and leakage, extending cable service life, and ensuring long-term stable operation. Currently used cable terminations often increase creepage distance and reduce electrical breakdown by installing multiple insulating skirts on their outer side. However, in limited installation space, the creepage distance of commonly used skirts with a fixed installation distance is relatively short. In special circumstances such as rainy weather, there is still a risk of electrical breakdown. Furthermore, the insulating liquid filling the cable termination may flow under the influence of external forces, resulting in uneven thickness of the insulating liquid, poor insulation stability, and a tendency for electrical breakdown and leakage. Utility Model Content

[0003] The purpose of this utility model is to provide a cable protection device to solve the technical problems of current cable terminals, which mostly increase the creepage distance and reduce electrical breakdown by installing multiple insulating skirts on their outer side. However, in limited installation space, the creepage distance of commonly used skirts with a fixed installation distance is relatively short, and there is still a risk of electrical breakdown in special conditions such as rainy weather. In addition, the insulating liquid filled in the cable terminal may flow under the influence of external forces, resulting in uneven thickness of the insulating liquid, poor insulation stability, and easy occurrence of electrical breakdown and leakage.

[0004] To achieve the above objectives, the specific technical solution of this utility model for a cable protection device is as follows:

[0005] A cable protection device includes a cable body; a conductor is disposed inside the cable body; an insulation layer is disposed outside the conductor; a terminal is disposed at the upper end of the conductor; a sleeve is disposed on the upper side of the cable body outside the conductor and the insulation layer; an insulating filler liquid is filled between the sleeve and the insulation layer; a stress cone is disposed between the bottom of the sleeve and the insulation layer; a composite insulating wrapping tape is disposed between the stress cone and the insulation layer; a sealing flange is disposed between the upper end of the sleeve and the insulation layer; a shielding cover is disposed at the top of the sleeve; a fixed mounting plate is disposed on the lower side of the sleeve; an outer insulating sheath is disposed on the outer side of the sleeve; multiple sheds are disposed on the outer insulating sheath; multiple annular walls are disposed on the lower side of the sheds; and a grounding wire extends outward from the lower side of the fixed mounting plate of the cable body.

[0006] Furthermore, multiple partitions are provided between the inner wall of the sleeve and the insulating layer; multiple through holes are provided on the partitions.

[0007] Furthermore, an annular sealing strip is provided at the top of the sleeve relative to the position of the insulating cover; an annular sealing groove is provided at the position of the insulating cover relative to the position of the annular sealing strip.

[0008] This utility model of a cable protection device has the following advantages: By providing multiple annular walls on the underside of the sheds on the outer insulation sheath, the current path on the shed surface is further increased over the same distance in a limited installation space. This extends the current flow distance on the shed surface under leakage current conditions, improves the insulation performance of the shed, increases the shed's resistance to voltage breakdown, improves the overall insulation performance of the outer insulation sheath, and reduces the occurrence of electrical breakdown. Furthermore, the insulation performance of this device is enhanced by filling the bushing, conductor, and insulation layer with an insulating filler liquid. Multiple baffles with through holes are installed between the bushing and the insulation layer. During the filling of the bushing with insulating liquid, the insulating liquid is passed through the through holes to fill the space inside the bushing. When the device is subjected to vibration or shaking due to external factors during installation and use, the baffles can effectively prevent the insulating liquid from shaking in the space inside the bushing, effectively ensure the flow of the insulating liquid inside the bushing, ensure that the thickness of the insulating liquid inside the bushing is consistent, improve the stability of insulation performance, and prevent electrical breakdown and leakage. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0010] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0011] Figure 3 This utility model Figure 2 Enlarged view of region A in the middle;

[0012] Figure 4 This utility model Figure 2 Enlarged view of region B in the middle;

[0013] The markings in the diagram are as follows: 1. Cable body; 2. Conductor; 3. Insulation layer; 4. Terminal; 5. Sleeve; 6. Stress cone; 7. Composite insulation wrapping tape; 8. Sealing flange; 9. Shielding cover; 10. Fixing plate; 11. Outer insulation sheath; 12. Umbrella skirt; 13. Annular wall; 14. Grounding wire; 15. Partition; 16. Through hole; 17. Annular sealing strip; 18. Annular sealing groove. Detailed Implementation

[0014] To better understand the purpose, structure, and function of this utility model, a cable protection device of this utility model will be described in further detail below with reference to the accompanying drawings.

[0015] like Figure 1-4 As shown, this utility model discloses a cable protection device, including a cable body 1; a conductor 2 is disposed inside the cable body 1; an insulation layer 3 is disposed outside the conductor 2; a terminal block 4 is disposed at the upper end of the conductor 2; a sleeve 5 is disposed on the upper side of the cable body 1 outside the conductor 2 and the insulation layer 3; an insulating filler liquid is filled between the sleeve 5 and the insulation layer 3; a stress cone 6 is disposed between the bottom of the sleeve 5 and the insulation layer 3; a composite insulating wrapping tape 7 is disposed between the stress cone 6 and the insulation layer 3; a sealing flange 8 is disposed between the upper end of the sleeve 5 and the insulation layer 3; a shielding cover 9 is disposed at the top of the sleeve 5; a fixed mounting plate 10 is disposed on the lower side of the sleeve 5; an outer insulating sheath 11 is disposed on the outer side of the sleeve 5; multiple umbrella skirts 12 are disposed on the outer insulating sheath 11; multiple annular ring walls 13 are disposed on the lower side of the umbrella skirts 12; a grounding wire 14 is disposed extending outward from the lower side of the fixed mounting plate 10 of the cable body 1.

[0016] Combination Figure 1-4As shown, during use, the device is fixedly installed using the mounting plate 10. The cable body 1 is stripped down to the conductor 2 and the outer insulation layer 3, which enter from the bottom of the device and exit from the top, connecting to the terminal 4. A composite insulating wrapping tape 7 and a stress cone 6 are installed at the junction of the cable body 1 and the mounting plate 10. Then, insulating filler liquid is filled into the space inside the sleeve 5 and the insulation layer 3. The sealing flange 8 is then sealed, the shielding cover 9 is installed, and the grounding wire 14 is grounded. The insulating filler liquid, the outer insulation sheath 11 of the sleeve 5, and the shed 12 provide the cable with better waterproof, stress control, and insulation shielding functions. The shed 12 has multiple annular walls 13 on its lower side. In a limited installation space, the same distance further increases the current path on the surface of the shed 12, extending the current flow distance on the surface of the shed 12 in the case of leakage current, improving the insulation performance of the shed 12, increasing the shed 12's resistance to voltage breakdown, improving the overall insulation performance of the outer insulation protective sleeve, and reducing the occurrence of electrical breakdown.

[0017] Multiple baffles 15 are provided between the inner wall of the sleeve 5 and the insulation layer 3. Multiple through holes 16 are provided on the baffles 15. During the process of filling the sleeve 5 with insulating filler liquid, the insulating filler liquid is passed through the through holes 16 to fill the space inside the entire sleeve 5. During the installation and use of this device, when the device is affected by external factors and vibrates or shakes, the baffles 15 can effectively prevent the insulating filler liquid from shaking in the space inside the sleeve 5, effectively ensure the flow of the insulating filler liquid inside the sleeve 5, ensure that the thickness of the insulating filler liquid inside the sleeve 5 is consistent, improve the stability of the insulation performance, and prevent electrical breakdown and leakage.

[0018] An annular sealing strip 17 is provided at the top of the sleeve 5 relative to the position of the insulating cover; an annular sealing groove 18 is provided at the position of the insulating cover relative to the annular sealing strip 17. When the shielding cover 9 is installed on the upper end of the sleeve 5, the sealing effect between the shielding cover 9 and the sleeve 5 is further enhanced by the cooperation of the annular sealing strip 17 and the annular sealing groove 18, which enhances the electromagnetic shielding function of the shielding cover 9, and also enhances the dustproof, waterproof and corrosion-proof effect of the shielding cover 9, prevents loosening and increases the stability of the installation of the shielding cover 9.

[0019] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A cable protection device, characterized in that, The cable includes a cable body (1); a conductor (2) is installed inside the cable body (1); an insulation layer (3) is installed on the outside of the conductor (2); a terminal block (4) is installed at the upper end of the conductor (2); a sleeve (5) is installed on the upper side of the cable body (1) outside the conductor (2) and the insulation layer (3); an insulating filler liquid is filled between the sleeve (5) and the insulation layer (3); a stress cone (6) is installed between the bottom of the sleeve (5) and the insulation layer (3); and composite insulation is installed between the stress cone (6) and the insulation layer (3). The cable body (7) is wrapped with a sealing flange (8) between the upper end of the sleeve (5) and the insulation layer (3); a shielding cover (9) is provided at the top of the sleeve (5); a fixed mounting plate (10) is provided on the lower side of the sleeve (5); an outer insulating sheath (11) is provided on the outside of the sleeve (5); multiple umbrella skirts (12) are provided on the outer insulating sheath (11); multiple annular ring walls (13) are provided on the lower side of the umbrella skirts (12); a grounding wire (14) is provided on the cable body (1) extending outward from the lower side of the fixed mounting plate (10).

2. The cable protection device according to claim 1, characterized in that, Multiple partitions (15) are provided between the inner wall of the sleeve (5) and the insulating layer (3); multiple through holes (16) are provided on the partitions (15).

3. A cable protection device according to claim 1, characterized in that, The top of the sleeve (5) is provided with an annular sealing strip (17) relative to the position of the insulating cover; the insulating cover is provided with an annular sealing groove (18) relative to the position of the annular sealing strip (17).

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