Grounding protection structure for reducing electromagnetic influence of high-voltage cable on adjacent metal pipeline

Abstract

The utility model discloses a grounding protection structure for reducing electromagnetic influence of a high-voltage cable on an adjacent metal pipeline, and relates to the technical field of power transmission of an electric power system. The device comprises a metal pipeline and a plurality of concentrated grounding grids, the centralized grounding grid comprises a horizontal grounding grid grid, grounding downleads and a vertical grounding body, the two ends of the top of the horizontal grounding grid grid are connected with the metal pipeline through the grounding downleads, and the multiple grounding downleads are arranged at the bottom of the horizontal grounding grid grid at intervals. According to the utility model, the induced voltage caused by the electromagnetic influence of the adjacent high-voltage cable on the metal pipeline is effectively reduced, and the safety and reliability of the operation of the metal pipeline are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system transmission technology field, more specifically, it is a kind of grounding protection structure for reducing the electromagnetic influence of adjacent metal pipeline of high voltage cable. BACKGROUND

[0002] With the sustained growth of China's economy, urban power grid construction is continuously upgraded, and power cable gradually replaces overhead transmission line as the main means of new high-voltage power line in urban area due to its flexible laying method and small corridor space occupation advantage; However, due to the shortage of urban underground space resources and the requirement of intensive development, high-voltage cable line and other urban underground metal pipelines (such as natural gas pipeline, heat pipeline, water supply pipeline, etc.) will inevitably appear parallel, cross, and even common channel laying, and the electromagnetic influence of high-voltage cable line on adjacent underground pipeline and the influence of underground pipeline on high-voltage cable line operation safety are increasingly prominent.

[0003] When high-voltage cable line is adjacent to urban underground pipeline, long-term existing power frequency alternating voltage and current and instantaneous short-circuit current occurring during short-circuit fault will have electromagnetic influence on adjacent metal pipeline, threatening the personal safety of nearby operation and maintenance personnel and the safety of metal pipeline equipment body.

[0004] Therefore, it is necessary to develop a grounding protection structure for reducing the electromagnetic influence of high-voltage cable on adjacent metal pipeline. UTILITY MODEL CONTENT

[0005] The utility model aims to overcome the shortcomings of the above background technology, and provides a grounding protection structure for reducing the electromagnetic influence of high-voltage cable on adjacent metal pipeline.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a grounding protection structure for reducing the electromagnetic influence of high-voltage cable on adjacent metal pipeline, characterized by comprising a metal pipeline and a plurality of concentrated grounding grids arranged at intervals along the bottom of the metal pipeline, the metal pipeline is arranged underground and beside the high-voltage cable.

[0007] The concentrated grounding grid comprises a horizontal ground grid, a grounding downlead and a vertical grounding body, the top of the horizontal ground grid is connected with the metal pipeline through the grounding downlead at both ends, and a plurality of grounding downleads are arranged at intervals at the bottom of the horizontal ground grid.

[0008] In the above technical scheme, a potential test pile is further included, one end of the potential test pile is connected with the metal pipeline, and the other end extends out of the ground, and an insulating ground is arranged at the position where the potential test pile extends out of the ground.

[0009] In the technical scheme, the horizontal ground grid square is connected by a plurality of horizontal grounding bodies, and the grounding down lead is arranged at the connection of adjacent horizontal grounding bodies.

[0010] In the technical scheme, the horizontal ground grid square has a plane size of 5m*20m, and every four horizontal grounding bodies form a square with a plane size of 5m*5m.

[0011] In the technical scheme, the adjacent concentrated grounding grids are spaced apart by 500m.

[0012] In the technical scheme, the insulating ground is paved by gravel or asphalt concrete, has a thickness of 10cm, and has a grounding resistivity of no less than 5000 ohm-m under rainy weather.

[0013] In the technical scheme, the grounding down lead and the horizontal grounding body are both 50mm*5mm copper-plated flat steel, and the vertical grounding body is a 2.5m long Φ16mm copper-plated steel rod.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1) The utility model effectively reduces the induced voltage of metal pipelines caused by the electromagnetic influence of adjacent high-voltage cables, and improves the safety and reliability of the operation of the metal pipelines.

[0016] 2) The utility model forms a high-resistance insulating ground at the exposed metal part of the metal pipeline and the potential test pile, the insulating ground can share most of the voltage of the metal pipeline to the ground, and provides a safe electromagnetic environment for the operation and maintenance personnel of the metal pipeline, thereby facilitating pipeline installation and disassembly, pipeline operation state observation and other work, and providing convenience for the operation and maintenance personnel of the metal pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model.

[0018] Figure 2 It is a side view of the concentrated grounding grid.

[0019] Figure 3 It is a plan view of the concentrated grounding grid.

[0020] Figure 4 It is a structural schematic view of the insulating ground.

[0021] Among them, 100-metal pipeline, 200-concentrated grounding grid, 210-horizontal ground grid square, 211-horizontal grounding body, 220-grounding down lead, 230-vertical grounding body, 300-high-voltage cable, 400-potential test pile, 500-insulating ground. DETAILED DESCRIPTION

[0022] The embodiments of the present application will be described in detail below with reference to the drawings, but they do not constitute a limitation on the present application, and are only examples. Meanwhile, the advantages of the present application will become more apparent and easier to understand through the description.

[0023] As shown in the drawings, the grounding protection structure for reducing electromagnetic influence of high-voltage cable on adjacent metal pipeline comprises a metal pipeline 100 and a plurality of concentrated grounding grids 200 arranged at intervals along the bottom of the metal pipeline 100, the metal pipeline 100 is arranged underground and beside a high-voltage cable 300, and the metal pipeline 100 is arranged in parallel with the high-voltage cable 300.

[0024] As shown in the drawings, the concentrated grounding grid 200 comprises a horizontal grounding grid square 210, a grounding down lead 220 and a vertical grounding body 230, both ends of the top of the horizontal grounding grid square 210 are connected with the metal pipeline 100 through the grounding down lead 220, and a plurality of grounding down leads 220 are arranged at intervals at the bottom of the horizontal grounding grid square 210. Figure 2 As shown in the drawings, the concentrated grounding grid 200 comprises a horizontal grounding grid square 210, a grounding down lead 220 and a vertical grounding body 230, both ends of the top of the horizontal grounding grid square 210 are connected with the metal pipeline 100 through the grounding down lead 220, and a plurality of grounding down leads 220 are arranged at intervals at the bottom of the horizontal grounding grid square 210.

[0025] Figure 1 As shown in the drawings, the concentrated grounding grid 200 comprises a horizontal grounding grid square 210, a grounding down lead 220 and a vertical grounding body 230, both ends of the top of the horizontal grounding grid square 210 are connected with the metal pipeline 100 through the grounding down lead 220, and a plurality of grounding down leads 220 are arranged at intervals at the bottom of the horizontal grounding grid square 210.

[0026] As shown in the drawings, the concentrated grounding grid 200 comprises a horizontal grounding grid square 210, a grounding down lead 220 and a vertical grounding body 230, both ends of the top of the horizontal grounding grid square 210 are connected with the metal pipeline 100 through the grounding down lead 220, and a plurality of grounding down leads 220 are arranged at intervals at the bottom of the horizontal grounding grid square 210. Figure 3 As shown in the drawings, the concentrated grounding grid 200 comprises a horizontal grounding grid square 210, a grounding down lead 220 and a vertical grounding body 230, both ends of the top of the horizontal grounding grid square 210 are connected with the metal pipeline 100 through the grounding down lead 220, and a plurality of grounding down leads 220 are arranged at intervals at the bottom of the horizontal grounding grid square 210.

[0027] Figure 3 As shown in the drawings, the concentrated grounding grid 200 comprises a horizontal grounding grid square 210, a grounding down lead 220 and a vertical grounding body 230, both ends of the top of the horizontal grounding grid square 210 are connected with the metal pipeline 100 through the grounding down lead 220, and a plurality of grounding down leads 220 are arranged at intervals at the bottom of the horizontal grounding grid square 210.

[0028] The intervals between adjacent concentrated grounding grids 200 are 500 m.

[0029] As shown in the drawings, the concentrated grounding grid 200 comprises a horizontal grounding grid square 210, a grounding down lead 220 and a vertical grounding body 230, both ends of the top of the horizontal grounding grid square 210 are connected with the metal pipeline 100 through the grounding down lead 220, and a plurality of grounding down leads 220 are arranged at intervals at the bottom of the horizontal grounding grid square 210. Figure 4 As shown in the drawings, the concentrated grounding grid 200 comprises a horizontal grounding grid square 210, a grounding down lead 220 and a vertical grounding body 230, both ends of the top of the horizontal grounding grid square 210 are connected with the metal pipeline 100 through the grounding down lead 220, and a plurality of grounding down leads 220 are arranged at intervals at the bottom of the horizontal grounding grid square 210.

[0030] The grounding down lead 220 and the horizontal grounding body 211 are both 50 mm x 5 mm copper-plated flat steel, and the vertical grounding body 230 is a 2.5 m long Φ16 mm copper-plated steel rod.

[0031] ​​In actual use, the insulating ground 500 is arranged at the ground surface of the exposed metal part of the metal pipeline 100.

[0032] The concentrated grounding grid 200 can significantly reduce the induced voltage of the buried metal pipeline 100 along the line laid in parallel with the high-voltage cable 300, and the induced voltage is controlled within the maximum allowable voltage amplitude required by personal and equipment safety.

[0033] Other unexplained parts belong to the prior art.

Claims

1. A grounding protection structure for reducing the electromagnetic influence of high-voltage cables on adjacent metal pipes, characterized in that: It includes a metal pipe (100) and a plurality of centralized grounding grids (200) spaced apart along the bottom of the metal pipe (100), the metal pipe (100) being located underground and next to a high-voltage cable (300); The centralized grounding grid (200) includes a horizontal grounding grid (210), grounding down conductors (220), and a vertical grounding body (230). The top two ends of the horizontal grounding grid (210) are connected to the metal pipe (100) through the grounding down conductors (220), and multiple grounding down conductors (220) are spaced apart at the bottom of the horizontal grounding grid (210).

2. The grounding protection structure for reducing the electromagnetic influence of high-voltage cables on adjacent metal pipes according to claim 1, characterized in that: It also includes a potential test post (400), one end of which is connected to a metal pipe (100) and the other end extends out of the ground. An insulating ground (500) is provided at the point where the potential test post (400) extends out of the ground.

3. The grounding protection structure for reducing the electromagnetic influence of high-voltage cables on adjacent metal pipes according to claim 1, characterized in that: The horizontal ground grid (210) is formed by connecting multiple horizontal grounding bodies (211), and the grounding down conductor (220) is set at the connection of adjacent horizontal grounding bodies (211).

4. The grounding protection structure for reducing the electromagnetic influence of high-voltage cables on adjacent metal pipes according to claim 3, characterized in that: The horizontal ground grid (210) has a planar dimension of 5 meters wide × 20 meters long, and every four horizontal grounding bodies (211) form a grid with a planar dimension of 5 meters wide × 5 meters long.

5. The grounding protection structure for reducing the electromagnetic influence of high-voltage cables on adjacent metal pipes according to claim 4, characterized in that: The distance between adjacent centralized grounding grids (200) is 500m.

6. The grounding protection structure for reducing the electromagnetic influence of high-voltage cables on adjacent metal pipes according to claim 1, characterized in that: The insulating ground (500) is made of gravel or asphalt concrete, the insulating ground (500) is 10 cm thick, and the grounding resistivity of the insulating ground (500) is not less than 5000 ohm-meters in rainy weather.

7. The grounding protection structure for reducing the electromagnetic influence of high-voltage cables on adjacent metal pipes according to claim 3, characterized in that: The grounding down conductor (220) and the horizontal grounding electrode (211) are both 50 mm × 5 mm copper-plated flat steel, and the vertical grounding electrode (230) is a 2.5 m long Φ16 mm copper-plated steel rod.

Images