CN210838133U

CN210838133U - Grounding device free of excavation

Info

Publication number: CN210838133U
Application number: CN201921467836.7U
Authority: CN
Inventors: 郑昌锐; 崔小勃
Original assignee: Guangdong Aibo Electric Power Design Institute Group Co ltd
Current assignee: Guangdong Aibo Electric Power Design Institute Group Co ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-06-23
Anticipated expiration: 2029-09-03

Abstract

The utility model discloses an exempt from earthing device of excavation, it includes ground connection downlead and the grounding body, the upper end of ground connection downlead is passed through detachable connecting device and is fixed on live equipment, the lower extreme and the grounding body of ground connection downlead are connected, the grounding body includes two piece at least earth bars, connects the formation barred body through the connector between two adjacent earth bars. The utility model discloses a make the earth bar connect and form the claviform grounding body, directly squeeze into the grounding body underground, make the both ends of ground connection downlead be connected with grounding body and connecting device respectively again, install connecting device in order to realize ground connection to live equipment at last. The utility model discloses need not to excavate the ground connection basis, reduced construction area and engineering volume, can adapt to site conditions, adjust the length of grounding body in a flexible way, be convenient for simultaneously maintain, change the ground connection downlead.

Description

Grounding device free of excavation

Technical Field

The utility model relates to an earthing device, especially an excavation-free earthing device in the electrical equipment protection field.

Background

In the operation of the distribution network, the conventional grounding device has the following problems. Firstly, the construction area of excavation is big, therefore earthing device's construction mounted position is limited more, simultaneously because reasons such as occupation of land expense compensation have increased the engineering investment indirectly. And secondly, the quantity of the ground foundation excavation work is large, the deep depth below the ground needs to be excavated, and the backfilled earth and stones also need to consume a large amount of manpower and time, so that the construction efficiency is directly influenced, and the project progress is slowed down. And thirdly, the grounding downlead is usually welded on the live equipment directly, even welded at the bottom of the live equipment, so that the grounding device is not convenient to maintain.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an exempt from earthing device of excavation, its installation is simple reliable.

The utility model provides a solution of its technical problem is: the utility model provides an excavation-free earthing device, its includes ground connection downlead and grounding body, the upper end of ground connection downlead is fixed on live equipment through detachable connecting device, the lower extreme and the grounding body of ground connection downlead are connected, the grounding body includes two piece at least earth bars, connects the formation barred body through the connector between two adjacent earth bars.

As a further improvement of the above technical scheme, the connecting device includes a connecting plate and two bolts, at least two through holes are provided on the connecting plate, the two bolts respectively pass through the through holes to be fixed on the live equipment, the upper end of the ground down lead is provided with a cold press joint, and the cold press joint is fixedly connected with the connecting plate.

As a further improvement of the technical scheme, the cold pressing device further comprises an insulating tube, wherein the grounding down lead penetrates through the insulating tube, the top end of the insulating tube is connected with the cold pressing joint, and the lower part of the insulating tube is connected with the ground.

As a further improvement of the above technical scheme, the connector is tubular, the inner side of the connector is provided with internal threads, both ends of the ground rod are provided with external threads, and the ground rod is in threaded connection with the connector.

As a further improvement of the above technical solution, the lower end of the ground down lead is connected with the top of the ground body through a joint, and the joint is welded with the ground body in a heat release manner.

As a further improvement of the above technical solution, an upper portion of the ground rod located at the topmost end of the ground body is connected with the impact-resistant bolt through a connector, and the joint is connected with the ground body through the impact-resistant bolt.

As a further improvement of the technical scheme, two ends of the grounding rod are provided with conical bulges.

The utility model has the advantages that: the utility model discloses a make the earth bar connect and form the claviform grounding body, directly squeeze into the grounding body underground, make the both ends of ground connection downlead be connected with grounding body and connecting device respectively again, install connecting device in order to realize ground connection to live equipment at last. The utility model discloses need not to excavate the ground connection basis, reduced construction area and engineering volume, can adapt to site conditions, adjust the length of grounding body in a flexible way, be convenient for simultaneously maintain, change the ground connection downlead.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic view of the overall structure of the present invention (not mounted to a live device);

fig. 2 is an exploded view of the grounding body of the present invention;

fig. 3 is a front view of the connecting device of the present invention;

fig. 4 is a left side view of the connecting device of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions.

Referring to fig. 1 to 4, an excavation-free grounding device includes a grounding down conductor 1 and a grounding body, the upper end of the grounding down conductor 1 is fixed on an electrified device 5 through a detachable connecting device, the lower end of the grounding down conductor 1 is connected with the grounding body, the grounding body includes at least two grounding rods 21, and two adjacent grounding rods 21 are connected through a connector 22 to form a rod body. Preferably, the length of a single ground rod 21 is 1-1.5 m, the ground rod 21 is a copper plated steel rod, and the thickness of the copper layer is not less than 0.25 mm. The copper layer not only improves the corrosion resistance of the ground rod 21, but also improves the conductivity of the ground rod 21 and reduces the external soil resistivity thereof. According to the grounding requirement and the condition of the soil on the site, a proper amount of grounding rods 21 are selected and connected to form a rod body. And (3) drilling the rod body into the ground beside the live equipment 5 by using a special electric tool, respectively connecting two ends of the grounding down lead 1 with the grounding body and the connecting device, and finally fixing the connecting device on the live equipment 5 to finish installation.

Further as a preferred embodiment, the connecting device includes a connecting plate 3 and two connecting bolts 32, at least two through holes 31 are provided on the connecting plate 3, the two connecting bolts 32 respectively penetrate through the through holes 31 to be fixed on the live equipment 5, the upper end of the grounding down lead 1 is provided with a cold press joint 11, and the cold press joint 11 is fixedly connected with the connecting plate 3. Preferably, the web 3 is flat steel, and the web 3 is crimped with the cold press fitting 11. Two threaded blind holes are arranged on the live equipment 5, and the connecting plate 3 is fixed on the live equipment 5 by the two connecting bolts 32. Because the connecting device is arranged at the position above the ground of the live equipment 5, the connecting device is more convenient for workers to maintain and replace.

Further, as a preferred embodiment, since the connecting device is located above the ground, part of the ground downlead is correspondingly exposed from the bottom surface, and in order to ensure the safe operation of the grounding device, an insulating tube is provided, the ground downlead 1 penetrates through the insulating tube, the top end of the insulating tube is connected with the cold press connector 11, and the lower part of the insulating tube is connected with the ground. The insulating tube can be PVC or other insulating materials, and the part that ground connection downlead 1 exposes on ground is surrounded by the insulating tube, has both protected ground connection downlead 1 and has not easily destroyed, has also prevented to electrocute.

Further, in a preferred embodiment, the connector 22 is tubular, an internal thread is provided inside the connector 22, an external thread is provided on both ends of the ground rod 21, and the ground rod 21 is screwed to the connector 22.

Further, in a preferred embodiment, the lower end of the ground down conductor 1 is connected to the top of the ground body by a joint 4, and the joint 4 is heat-welded to the ground body. Compared with other connection modes, the heat release welding has the advantages that the grounding body or the joint cannot be damaged, and no contact surface exists between the grounding body and the joint, so that the overall effectiveness of an interface is not changed, the resistance of the joint is low, and the joint can bear large-current fault impact and cannot be fused.

Further, in a preferred embodiment, the upper portion of the ground rod 21 positioned at the topmost end of the ground body is connected to an impact bolt 23 by a connector 22, and the joint 4 is connected to the ground body by the impact bolt 23.

Further as a preferred embodiment, both ends of the ground rod 21 are provided with conical projections 24 to facilitate deep drilling of the ground body below the ground surface. The pyramidal protrusions 24 may be integrally formed with the ground rod 21.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. The utility model provides an excavation-free earthing device which characterized in that: including ground connection downlead (1) and grounding body, the upper end of ground connection downlead (1) is passed through detachable connecting device and is fixed on live equipment (5), the lower extreme and the grounding body of ground connection downlead (1) are connected, the grounding body includes two piece at least earth bars (21), connects through connector (22) between two adjacent earth bars (21) and forms the barred body.

2. The trenchless grounding assembly of claim 1 wherein: the connecting device comprises a connecting plate (3) and two connecting bolts (32), at least two through holes (31) are formed in the connecting plate (3), the two connecting bolts (32) penetrate through the through holes (31) respectively and are fixed on the electrified equipment (5), the upper end of the grounding down lead (1) is provided with a cold press connector (11), and the cold press connector (11) is fixedly connected with the connecting plate (3).

3. The trenchless grounding assembly of claim 2 wherein: still include the insulating tube, ground connection downlead (1) runs through the insulating tube, the top and cold pressing joint (11) of insulating tube meet, the lower part and the ground of insulating tube meet.

4. The trenchless grounding assembly of claim 1 wherein: the connector (22) is tubular, the inner side of the connector (22) is provided with internal threads, the two ends of the grounding rod (21) are provided with external threads, and the grounding rod (21) is in threaded connection with the connector (22).

5. The trenchless grounding assembly of claim 4 wherein: the lower end of the grounding down lead (1) is connected with the top of the grounding body through a joint (4), and the joint (4) is in heat release welding with the grounding body.

6. The trenchless grounding assembly of claim 5 wherein: the upper portion of the grounding rod (21) located at the topmost end in the grounding body is connected with an anti-impact bolt (23) through a connector (22), and the joint (4) is connected with the grounding body through the anti-impact bolt (23).

7. The trenchless grounding assembly of claim 1 wherein: two ends of the grounding rod (21) are provided with conical bulges (24).