CN215601015U - High-voltage cable protection grounding box - Google Patents
High-voltage cable protection grounding box Download PDFInfo
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- CN215601015U CN215601015U CN202120549774.5U CN202120549774U CN215601015U CN 215601015 U CN215601015 U CN 215601015U CN 202120549774 U CN202120549774 U CN 202120549774U CN 215601015 U CN215601015 U CN 215601015U
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Abstract
The utility model discloses a high-voltage cable protection grounding box, and relates to the technical field of power transmission of power systems. The box comprises a box body, an insulating plate, a first grounding copper bar and a second grounding copper bar; a plurality of protective layer protectors are arranged on the first grounding copper bar and the second grounding copper bar at intervals, and the first grounding copper bar and the second grounding copper bar are connected through a connecting copper bar. The utility model can safely and reliably realize that the two sides of the metal sheath of the cable are simultaneously grounded through the sheath protector at the joint.
Description
Technical Field
The utility model relates to the technical field of power transmission of a power system, in particular to a high-voltage cable protection grounding box.
Background
With the continuous improvement of the economic level of China, the social electricity consumption and the power grid scale are both increased rapidly, but the available power transmission line corridors are fewer and fewer, and the land resources are extremely precious. Especially in large cities with dense population, the power transmission mode adopting overhead lines is facing more and more difficulties, and high-voltage cable lines are more and more widely applied to urban power grids and gradually replace overhead lines to become the main power transmission mode of the urban power grids.
In order to reduce the induced current on the metal sheath of the high voltage ac single core cable, the metal sheath of the high voltage ac cable line is usually grounded by a single point or cross-connected. The single-point grounding is suitable for short-distance cable lines, and the long-distance cable lines are generally grounded by adopting cross interconnection. One end of the cable line of the single-point grounding is provided with a protective grounding box, and the other end is provided with a direct grounding box. In the cable line that the distance is shorter, the condition that single-phase cable is divided into two sections by insulating joint can appear, and each section is an solitary single-point ground system, because the restriction of engineering condition, if the protection grounding box of two sections cables all need set up the insulating joint department in the middle of this section, insulating joint department then need install two solitary protection grounding boxes, has not only increased the engineering volume, has occupied on-the-spot installation space, has also increased construction cycle.
This phenomenon is more common in cable modification and emergency work. For example, in an original overhead line and cable hybrid system, when a new section of overhead line is connected with an original cable by adopting a cable-in ground, the possibility that two adjacent single-point grounding systems appear is very high. In addition, when the cable in a finished cross interconnection system is damaged by external force and joints need to be added, three sections of cables forming the original cross interconnection system are changed into four sections, and at the moment, in order to avoid circulating current and voltage imbalance in the metal sheath, the four sections of cables need to be changed into single-point grounding, so that two adjacent single-point grounding systems can also appear.
Therefore, it is necessary to develop a high voltage cable protection grounding box.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the background technology and provide a high-voltage cable protection grounding box.
In order to achieve the purpose, the technical scheme of the utility model is as follows: high tension cable protects earthing box, its characterized in that: the box body is arranged on the box body, and the first grounding copper bars and the second grounding copper bars are arranged on the insulating plate at intervals in parallel; a plurality of protective layer protectors are arranged on the first grounding copper bar and the second grounding copper bar at intervals, and the first grounding copper bar and the second grounding copper bar are connected through a connecting copper bar;
an inner core connector is arranged at the upper end of the sheath protector on the first grounding copper bar; and an outer core connector is arranged at the upper end of the sheath protector on the second grounding copper bar.
In the technical scheme, the coaxial cable penetrates through the box body and is sequentially connected with the outer core connector and the inner core connector.
In the technical scheme, the grounding cable penetrates through the box body to be connected with the second grounding copper bar and is connected with the first grounding copper bar through the connecting copper bar.
In the above technical scheme, three sheath protectors are arranged on the first ground copper bar and the second ground copper bar at intervals.
Compared with the prior art, the utility model has the following advantages:
1) the utility model can safely and reliably realize that the two sides of the metal sheath of the cable are simultaneously grounded through the sheath protector at the joint.
2) The utility model has the advantages of convenient installation, space saving, satisfying of the requirement of attractive engineering and reduction of the engineering investment.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the coaxial cable, the outer core connector and the inner core connector of the present invention.
Fig. 3 is a schematic structural view of the ground cable, the second ground copper bar, the connecting copper bar and the first ground copper bar in the present invention.
Fig. 4 is a schematic structural view of the connecting copper bar and the outer core connector in the utility model.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the utility model will be apparent and readily appreciated by the description.
With reference to the accompanying drawings: high tension cable protects earthing box, its characterized in that: the box body comprises a box body 1, an insulating plate 2 positioned inside the box body 1, and a first grounding copper bar 21 and a second grounding copper bar 22 which are positioned on the insulating plate 2 and are arranged in parallel at intervals; a plurality of sheath protectors 3 are arranged on the first grounding copper bar 21 and the second grounding copper bar 22 at intervals, and the first grounding copper bar 21 and the second grounding copper bar 22 are connected through a connecting copper bar 4;
an inner core connector 5 is arranged at the upper end of the sheath protector 3 on the first grounding copper bar 21; and an outer core connector 6 is arranged at the upper end of the sheath protector 3 on the second grounding copper bar 22.
A coaxial cable 7 penetrates through the box body 1 and is sequentially connected with the outer core connector 6 and the inner core connector 5; the outer core of the coaxial cable 7 is connected with the outer core connector 6, and the inner core of the coaxial cable 7 is connected with the inner core connector 5
The grounding cable 8 penetrates through the box body 1 to be connected with the second grounding copper bar 22 and is connected with the first grounding copper bar 21 through the connecting copper bar 4.
Three sheath protectors 3 are arranged on the first grounding copper bar 21 and the second grounding copper bar 22 at intervals.
In practical use, when the conductivity of the inner core and the outer core of the coaxial cable 7 needs to be measured, the first ground copper bar 21 and the second ground copper bar 22 can be disconnected from the connecting copper bar 4 and the ground cable 8.
The utility model only needs one box body 1 to realize the function that the metal sheath of the cable is grounded through the sheath protector 3 at both sides of the joint, meanwhile, the box body 1 has the characteristics of intensification and compactification, and the grounding ends of the sheath protector 3 are all connected to the grounding cable 8 through the grounding copper bar to realize common grounding points.
Other parts not described belong to the prior art.
Claims (4)
1. High tension cable protects earthing box, its characterized in that: the grounding device comprises a box body (1), an insulating plate (2) positioned in the box body (1), and a first grounding copper bar (21) and a second grounding copper bar (22) which are positioned on the insulating plate (2) and are arranged in parallel at intervals; a plurality of sheath protectors (3) are arranged on the first grounding copper bar (21) and the second grounding copper bar (22) at intervals, and the first grounding copper bar (21) and the second grounding copper bar (22) are connected through a connecting copper bar (4);
an inner core connector (5) is arranged at the upper end of the sheath protector (3) on the first grounding copper bar (21); and an outer core connector (6) is arranged at the upper end of the sheath protector (3) on the second grounding copper bar (22).
2. The high voltage cable protection grounding box of claim 1, characterized in that: a coaxial cable (7) penetrates through the box body (1) and is sequentially connected with the outer core connector (6) and the inner core connector (5).
3. The high voltage cable protection grounding box of claim 2, characterized in that: a grounding cable (8) penetrates through the box body (1) to be connected with a second grounding copper bar (22) and is connected with a first grounding copper bar (21) through a connecting copper bar (4).
4. The high voltage cable protection grounding box of claim 3, characterized in that: three sheath protectors (3) are arranged on the first grounding copper bar (21) and the second grounding copper bar (22) at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120549774.5U CN215601015U (en) | 2021-03-17 | 2021-03-17 | High-voltage cable protection grounding box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120549774.5U CN215601015U (en) | 2021-03-17 | 2021-03-17 | High-voltage cable protection grounding box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215601015U true CN215601015U (en) | 2022-01-21 |
Family
ID=79869772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120549774.5U Active CN215601015U (en) | 2021-03-17 | 2021-03-17 | High-voltage cable protection grounding box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215601015U (en) |
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2021
- 2021-03-17 CN CN202120549774.5U patent/CN215601015U/en active Active
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