Grounding protection device for power distribution network

Abstract

The utility model belongs to the technical field of power distribution network grounding protection, and discloses a grounding protection device for a power distribution network, which comprises a grounding electrode, a protective shell and a soil humidity adjusting mechanism, the grounding electrode is detachably arranged in the protective shell, the protective shell is provided with a plurality of through holes, and the soil humidity adjusting mechanism is arranged in the protective shell. The soil humidity adjusting mechanism comprises a water storage tank, the lower end of the water storage tank is communicated with a water outlet pipe, a water valve is installed on the water outlet pipe, and a water outlet of the water valve is communicated with the interior of the protective shell through a connecting hose. Therefore, the reliability of the grounding effect is improved, and the problem of grounding failure caused by too low soil humidity is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to power distribution network grounding protection technical field, especially relates to a grounding protection device for power distribution network. BACKGROUND

[0002] The distribution network is an important part of the power system, and its main function is to accept electric energy from the power transmission network or regional power plant and distribute it to various users through distribution facilities. The distribution network is composed of overhead lines, cables, towers, distribution transformers, disconnectors, etc., and plays a key role in distributing electric energy in the power grid. The grounding protection device plays a crucial role in the distribution network, and its main function is to ensure that the current can safely flow to the ground in the event of a fault, thereby protecting the safety of equipment and personnel.

[0003] The existing grounding protection device adopts the traditional grounding wire connection method, which is easily disturbed by changes in soil humidity. When the soil humidity is too low, the soil's conductivity will decrease, resulting in unstable grounding effect and affecting the reliability of the system. Therefore, we propose a grounding protection device for power distribution network. SUMMARY

[0004] The purpose of the utility model is to provide a grounding protection device for power distribution network, thereby solving or at least alleviating one or more of the above problems and other aspects in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the main technical scheme including:

[0006] A grounding protection device for power distribution network, comprising a grounding electrode, a protective shell and a soil humidity adjusting mechanism, the grounding electrode is detachably installed inside the protective shell, the protective shell, a plurality of through holes are formed on the protective shell;

[0007] The soil humidity adjusting mechanism comprises a water storage tank, the lower end of the water storage tank is communicated with a water outlet pipe, a water valve is installed on the water outlet pipe, and the water outlet of the water valve is communicated with the inside of the protective shell through a connecting hose.

[0008] In the grounding protection device for power distribution network according to the utility model, the grounding electrode comprises a conductive metal rod, the conductive metal rod is provided with a plurality of roots, the conductive metal rods are fixedly connected through a conductive connecting piece, a plurality of insertion holes are formed on the conductive connecting piece, and the conductive metal rod is fixedly inserted into the insertion hole.

[0009] In the grounding protection device for power distribution network according to the utility model, the conductive connecting piece is fixedly connected with a wiring module for connecting the grounding end of the power distribution network, the wiring module comprises an inverted U-shaped conductive connector and a handle bolt, the inverted U-shaped conductive connector is fixedly welded on the conductive connecting piece, one end of the handle bolt is screwed through the inverted U-shaped conductive connector, extends into the inside of the inverted U-shaped conductive connector and is rotationally connected with a pressing plate, the pressing plate is slidingly arranged on the inside of the inverted U-shaped conductive connector, and a through slot for the inverted U-shaped conductive connector to extend out is formed in the top of the protective shell.

[0010] In the grounding protection device for power distribution network according to the utility model, anti-skid lines are formed on one side of the pressing plate and the inner side wall of the inverted U-shaped conductive connector.

[0011] In the grounding protection device for power distribution network according to the utility model, the top of the protective shell is provided with an opening, an upper cover is fixedly installed on the top of the protective shell through screwing, a partition plate is fixedly connected to the inside of the upper cover, a cavity is formed between the partition plate and the inner top of the upper cover, a connecting nozzle is formed on the top of the upper cover, the connecting nozzle is in communication with the cavity, a plurality of flow guide notches are formed in the partition plate, the plurality of flow guide notches are arranged in a ring-shaped equidistant array at the edge of the partition plate, and one end of the connecting hose away from the water storage tank is in communication with the connecting nozzle.

[0012] In the grounding protection device for power distribution network according to the utility model, a humidity sensor is fixedly installed in the protective shell, a control box is fixedly installed on one side of the outer wall of the water storage tank, a controller is fixedly installed in the control box, the humidity sensor is electrically connected to the controller, and the water valve is an electromagnetic valve.

[0013] In the grounding protection device for power distribution network according to the utility model, the protective shell is an insulating shell.

[0014] In the grounding protection device for power distribution network according to the utility model, the conductive metal rod is a copper-clad steel metal rod.

[0015] In the grounding protection device for power distribution network according to the utility model, a conductive anticorrosive coating is sprayed on the surface of the conductive metal rod, and the conductive anticorrosive coating is a zinc-aluminum alloy anticorrosive coating.

[0016] In the grounding protection device for power distribution network according to the utility model, a limiting block is fixedly connected to the conductive connecting piece, a limiting slot is formed on the inner wall of the protective shell, and the limiting block is inserted into the limiting slot.

[0017] The utility model at least has following beneficial effects:

[0018] The utility model discloses soil humidity adjusting mechanism can be automatically adjusted soil humidity according to soil humidity variation, ensures that soil conductivity is stable, thereby promotes the reliability of grounding effect, avoids the grounding failure problem caused by soil humidity being too low;

[0019] By being equipped with humidity sensor and controller, can real -time monitoring soil humidity and automatic control water valve's switch, realizes intelligent management, reduces manual intervention, improves operating efficiency;

[0020] Grounding electrode adopts detachable installation mode, and is connected with wiring module through conductive connecting piece, and it is convenient to install, maintain and replace, reduces operation and maintenance cost;

[0021] Conductive metal bar surface has zinc-aluminum alloy anticorrosive coating and is sprayed, effectively prolongs the service life of device, adapts complex environment under long -term operation;

[0022] Through the upper cover and the protective shell set, cooperate with the through -hole and the flow guide gap, can protect the internal structure from the influence of external environment, can also ensure that the moisture is evenly distributed, further improve the grounding effect. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the illustrative embodiments of the present application and its description are used to explain the present application, and do not constitute undue limitation on the present application. In the drawings:

[0024] Figure 1 It is the structure schematic diagram of partial explosion of the grounding protection device for power distribution network of the utility model;

[0025] Figure 2 It is the structure schematic diagram of partial explosion of the grounding protection device for power distribution network of the utility model;

[0026] Figure 3 It is the structure schematic diagram of partial explosion of the grounding protection device for power distribution network of the utility model; Figure 2

[0027] Figure 4 It is the sectional structure schematic diagram of the protective shell of the utility model;

[0028] Figure 5 It is the structure schematic diagram of the upper cover of the utility model.

[0029] Explanation of the drawings:

[0030] ​1, protective shell; 101, limiting slot; 102, through slot; 103, through hole; 2, water storage tank; 201, water outlet pipe; 202, water valve; 203, connecting hose; 3, upper cover; 301, connecting nozzle; 302, partition; 3021, flow guide notch; 303, cavity; 4, conductive metal rod; 5, conductive connecting piece; 501, inverted U-shaped conductive connector; 502, limiting block; 503, handle bolt; 504, pressing plate; 6, control box; 7, soil moisture sensor. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described in detail below with the accompanying drawings and examples, so that the realization process of how to apply technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

[0032] Please refer to Figures 1 to 5 The embodiment of the present application provides a grounding protection device for power distribution network, which comprises a grounding electrode, a protective shell 1 and a soil humidity adjusting mechanism. The grounding electrode is detachably installed in the interior of the protective shell 1. A plurality of through holes 103 are formed on the protective shell 1, which are used to realize the electrical connection between the grounding electrode and the surrounding soil.

[0033] The soil humidity adjusting mechanism comprises a water storage tank 2. The lower end of the water storage tank 2 is communicated with a water outlet pipe 201. A water valve 202 is installed on the water outlet pipe 201. The water outlet of the water valve 202 is communicated with the interior of the protective shell 1 through a connecting hose 203. By controlling the opening and closing of the water valve 202, the soil humidity in the interior of the protective shell 1 can be adjusted, so as to ensure that the grounding electrode is always in a suitable working environment.

[0034] Embodiment 2: Grounding electrode structure

[0035] The grounding electrode is composed of a plurality of conductive metal rods 4. The plurality of conductive metal rods 4 are fixedly connected through a conductive connecting piece 5. A plurality of insertion holes are formed on the conductive connecting piece 5. The conductive metal rods 4 are fixedly inserted into the insertion holes. This structure not only improves the overall stability of the grounding electrode, but also facilitates the installation and replacement of the grounding electrode.

[0036] Embodiment 3: Wiring module

[0037] The conductive connecting piece 5 is fixedly connected with a wiring module for connecting with the grounding end of the power distribution network, the wiring module comprises a reverse U-shaped conductive connector 501 and a handle bolt 503, the reverse U-shaped conductive connector 501 is fixedly welded on the conductive connecting piece 5, one end of the handle bolt 503 is screwed through the reverse U-shaped conductive connector 501 and extends into the inner side of the reverse U-shaped conductive connector 501, and the handle bolt 503 is rotationally connected with a pressing plate 504, the pressing plate 504 is slidingly arranged on the inner side of the reverse U-shaped conductive connector 501, and the grounding wire can be clamped between the pressing plate 504 and the reverse U-shaped conductive connector 501 by screwing the handle bolt 503, in order to facilitate installation, a through groove 102 is formed in the top of the protective shell 1 and used for the reverse U-shaped conductive connector 501 to extend out, in order to enhance the reliability of the wiring, anti-skid lines are formed on one side of the pressing plate 504 and the inner side wall of the reverse U-shaped conductive connector 501, so that the grounding wire is prevented from loosening during operation.

[0038] Embodiment 4: protective shell and upper cover structure

[0039] The top of the protective shell 1 is open, the top of the protective shell 1 is fixedly installed with an upper cover 3 through screwing, the inner side of the upper cover 3 is fixedly connected with a partition plate 302, a cavity 303 is formed between the partition plate 302 and the inner top of the upper cover 3, a connecting nozzle 301 is formed on the top of the upper cover 3 and communicates with the cavity 303, a plurality of flow guide notches 3021 are formed in the partition plate 302 and are arranged in a ring-shaped equidistant array at the edge of the partition plate 302, and one end of the connecting hose 203 away from the water storage tank 2 communicates with the connecting nozzle 301,

[0040] By adopting the above technical scheme, the water flowing out of the water storage tank 2 can enter the cavity 303 through the connecting hose 203 and flow into the protective shell 1 uniformly through the flow guide notches 3021, so that the moisture content of the soil is maintained.

[0041] Embodiment 5: humidity sensor and automatic control

[0042] The humidity sensor 7 is fixedly installed in the protective shell 1, the control box 6 is fixedly installed on one side of the outer wall of the water storage tank 2, the controller is fixedly installed in the control box 6, the humidity sensor 7 is electrically connected with the controller, and the water valve 202 is arranged as an electromagnetic valve and is controlled by the controller.

[0043] When the humidity sensor 7 detects that the soil humidity in the protective shell 1 is lower than the set value, the controller automatically opens the water valve 202, so that the water in the water storage tank 2 flows into the protective shell 1 through the water outlet pipe 201 and the connecting hose 203, and the soil humidity is increased, when the humidity reaches the set value, the controller automatically closes the water valve 202 to stop water supply, and this automatic control mode not only improves the intelligent level of the grounding protection device, but also reduces the workload of manual maintenance.

[0044] In the embodiment, the controller is a DSP controller with model TMS320F2812, and the humidity sensor 7 is a soil humidity sensor with model MP-508C.

[0045] Embodiment 6: Insulation and corrosion prevention design

[0046] In the embodiment, the protective shell 1 is made of insulating material, ensuring the safety of the operator, the conductive metal rod 4 is made of copper-clad steel material, having good electrical conductivity and mechanical strength, in addition, the surface of the conductive metal rod 4 is sprayed with a zinc-aluminum alloy corrosion-resistant coating, further improving the corrosion resistance of the grounding electrode,

[0047] Embodiment 7: Limiting structure

[0048] The conductive connecting piece 5 is fixedly connected with a limiting block 502, and the inner wall of the protective shell 1 is formed with a limiting slot 101, the limiting block 502 is inserted into the limiting slot 101, and the limiting structure ensures the stable installation of the grounding electrode in the protective shell 1, preventing displacement of the grounding electrode during operation.

[0049] Working principle: when working, the humidity sensor 7 monitors the soil humidity in real time and transmits data to the controller. When the soil humidity is too low, the controller opens the water valve 202, and the water in the water storage tank 2 flows into the protective shell 1 through the water outlet pipe 201 and the connecting hose 203 via the flow guide gap 3021, adjusting the soil humidity, when the humidity reaches the set value, the controller closes the water valve 202, stopping water supply.

[0050] The above description shows and describes several preferred embodiments of the utility model, but as described above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein by the above teaching or related technical or knowledge. The modification and change made by the person skilled in the art without departing from the spirit and scope of the utility model should be within the protection scope of the claims attached to the utility model.

Claims

1. A ground protection device for electric power distribution network, characterized by, Including ground electrode, protective shell (1) and soil humidity adjusting mechanism, the ground electrode is detachably installed in the interior of the protective shell (1), the protective shell (1), the protective shell (1) is provided with a plurality of through holes (103); The soil humidity adjusting mechanism includes a water storage tank (2), the lower end of the water storage tank (2) is communicated with a water outlet pipe (201), the water outlet pipe (201) is provided with a water valve (202), and the water outlet of the water valve (202) is communicated with the interior of the protective shell (1) through a connecting hose (203).

2. The grounding protection device for power distribution network according to claim 1, characterized in that: The ground electrode includes a plurality of conductive metal rods (4), the conductive metal rods (4) are fixedly connected by a plurality of conductive connecting pieces (5), the conductive connecting pieces (5) are provided with a plurality of insertion holes, and the conductive metal rods (4) are fixedly inserted into the insertion holes.

3. The grounding protection device for power distribution network according to claim 2, characterized in that: The conductive connecting piece (5) is fixedly connected with a wiring module for connecting the ground end of the power distribution network, the wiring module includes a reverse U-shaped conductive connector (501) and a handle bolt (503), the reverse U-shaped conductive connector (501) is fixedly welded on the conductive connecting piece (5), one end of the handle bolt (503) is screwed and rotated to penetrate the reverse U-shaped conductive connector (501), extends into the inner side of the reverse U-shaped conductive connector (501), and is rotationally connected with a pressing plate (504), the pressing plate (504) is slidably arranged in the inner side of the reverse U-shaped conductive connector (501), and the top of the protective shell (1) is provided with a through slot (102) for the reverse U-shaped conductive connector (501) to extend out.

4. The grounding protection device for power distribution network according to claim 3, characterized in that: Anti-skid lines are formed on one side of the pressing plate (504) and the inner side wall of the reverse U-shaped conductive connector (501).

5. The grounding protection device for power distribution network according to claim 4, characterized in that: The top of the protective shell (1) is provided with an opening, the top of the protective shell (1) is fixedly installed with an upper cover (3) through screw threads, the inner side of the upper cover (3) is fixedly connected with a partition plate (302), a cavity (303) is formed between the partition plate (302) and the inner top of the upper cover (3), a connecting nozzle (301) is formed on the top of the upper cover (3) and is communicated with the cavity (303), a plurality of flow guide notches (3021) are formed in the partition plate (302), and the connecting nozzle (301) is communicated with the connecting hose (203) away from the water storage tank (2).

6. The grounding protection device for power distribution network according to claim 5, characterized in that: A humidity sensor (7) is fixedly installed in the interior of the protective shell (1), a control box (6) is fixedly installed on one side of the water storage tank (2), a controller is fixedly installed in the control box (6), the humidity sensor (7) is electrically connected with the controller, and the water valve (202) is an electromagnetic valve.

7. The grounding protection device for power distribution network according to claim 6, characterized in that: The protective shell (1) is an insulating shell.

8. The grounding protection device for power distribution network according to claim 7, characterized in that: The conductive metal rod (4) is a copper-coated steel metal rod.

9. The grounding protection device for power distribution network according to claim 8, characterized in that: The surface of the conductive metal rod (4) is sprayed with a conductive anticorrosive coating, which is a zinc-aluminum alloy anticorrosive coating.

10. The grounding protection device for power distribution network according to claim 5, characterized in that: A limiting block (502) is fixedly connected to the conductive connecting piece (5), and the inner wall of the protective shell (1) is formed with a limiting slot (101), and the limiting block (502) is inserted into the limiting slot (101).

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