CN112038793A - Grounding fitting, grounding device and transformer - Google Patents

Abstract

The application relates to a grounding accessory, a grounding device and a transformer. The grounding accessory is used for realizing the connection between the cable head and the grounding head. The grounding fitting includes a conductive support plate and a U-shaped conductive plate. The conductive support plate is connected with the cable head, a through hole is formed in the conductive support plate, and the cable head is arranged in the through hole in a penetrating mode. The U-shaped conductive plate is connected with the conductive support plate and surrounded with the conductive support plate to form a jack, and the grounding head is inserted in the jack. The grounding device comprises the grounding fitting and the grounding head. The transformer includes the ground fitting and the cable head. The grounding accessory provided by the embodiment of the application is characterized in that the grounding accessory is inserted into the conductive support plate and the jack formed by the U-shaped conductive plate, so that the grounding of the cable head is realized, the electric power safety working rules are met, and the potential safety hazard existing in the maintenance and overhaul process can be avoided.

Description

Grounding accessories, grounding devices and transformers

technical field

The present application relates to the technical field of electrical equipment, and in particular, to a grounding accessory, a grounding device and a transformer.

Background technique

According to the electrical safety work regulations, when high-voltage electrical equipment is being repaired, grounding wires must be installed on both sides of the repaired equipment that may receive electricity. However, for power equipment with narrow space and compact equipment structure, such as: compact box-type station power transformers. When the power equipment needs to be repaired, the existing ground rod cannot be used for grounding operations due to the lack of dedicated grounding points in the power equipment and the limitation of internal space.

In the traditional technology, maintenance personnel are usually required to wear insulating gloves to enter the power equipment to be tested, and install the existing grounding head in the power equipment to realize the grounding of the power equipment. However, such an operation has security risks.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a grounding accessory, a grounding device and a transformer for the above technical problems.

On the one hand, an embodiment of the present application provides a grounding accessory for connecting a cable head to a grounding head, and the grounding accessory includes:

a conductive support plate connected to the cable head, the conductive support plate is provided with a through hole, and the cable head is passed through the through hole;

The U-shaped conductive plate is connected to the conductive support plate, and surrounds the conductive support plate to form an insertion hole, and the ground head is inserted into the insertion hole.

In one embodiment, the through hole is opened on a side of the conductive support plate away from the U-shaped conductive plate.

In one embodiment, the conductive support plate and the U-shaped conductive plate form an L-shaped structure.

In one embodiment, the conductive support plate and the U-shaped conductive plate are made of copper.

On the other hand, an embodiment of the present application provides a grounding device, including:

Grounding accessories as described above;

The grounding head is inserted into the jack.

In one embodiment, it also includes:

The operation rod is connected with the grounding head.

In one embodiment, it also includes:

A grounding wire is connected to the grounding head.

In yet another aspect, an embodiment of the present application provides a transformer, including:

Grounding accessories as described above;

The cable head is passed through the through hole.

In one embodiment, the cable head includes:

bolts, connected with the conductive support plate;

A nut is connected with the bolt and is used for fixing the conductive support plate to the bolt.

In one of the embodiments, the cable head is a low-voltage side cable head or a high-voltage side cable head.

In the grounding accessory, the grounding device, and the transformer provided in this embodiment, the grounding accessory includes a conductive support plate and a U-shaped conductive plate. The conductive support plate is connected to the cable head, the conductive support plate is provided with a through hole, and the cable head passes through the through hole. The U-shaped conductive plate is connected to the conductive support plate, and surrounds the conductive support plate to form an insertion hole, and the ground head is inserted into the insertion hole. The grounding accessory provided in this embodiment uses the conductive support plate and the U-shaped conductive plate. During maintenance and repair, the grounding head is inserted into the U-shaped conductive plate and the conductive support plate to form the The jack can realize the grounding of the cable head, so as to realize the grounding of the power equipment, and comply with the power safety work regulations. In this way, there is no need for maintenance personnel to enter the interior of the electrical equipment to make the electrical equipment grounded, which can avoid potential safety hazards during maintenance and repair. In addition, the grounding fitting provided in this embodiment can be directly penetrated on the cable head through the through hole opened by the conductive support plate, and the operation is simple and convenient. At the same time, the grounding fitting has a simple structure, convenient installation, easy acquisition of materials, and high practicability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the traditional technology, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the traditional technology. Obviously, the drawings in the following description are only the For some embodiments of the application, for those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic side view structure diagram of a grounding accessory provided by an embodiment of the present application;

FIG. 2 is a schematic front view structure of a grounding accessory provided by an embodiment of the present application;

3 is a schematic structural diagram of a grounding device provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a grounding device provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a transformer provided by an embodiment of the present application.

E.g

Description of reference numbers:

10. Cable head;

11. Bolts;

12. Nut;

20. Grounding accessories;

30. Grounding head;

40. Operation stick;

50. Ground wire;

60. Grounding device;

70. Transformer;

100. Conductive support plate;

110. Through hole;

200, U-shaped conductive plate;

210. Jack.

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

The serial numbers themselves, such as "first", "second", etc., for the components herein are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "connection" mentioned in this application, unless otherwise specified, include both direct and indirect connections (connections). In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description , rather than indicating or implying that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation on the present application.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The grounding accessories provided in the embodiments of the present application can be applied to power equipment with narrow space and compact equipment, such as power transformers for compact box-type stations and power equipment such as one-step-down and two-step-down GG-1AF high-voltage switch cabinets. By connecting the grounding accessory to the cable head in the power equipment, the grounding of the power equipment can be realized, thereby meeting the electrical safety work regulations.

The technical solutions of the present application and how the technical solutions of the present application solve the above-mentioned technical problems will be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

Referring to FIG. 1 and FIG. 2 , an embodiment of the present application provides a grounding accessory 20 . The ground fitting 20 is used to connect the cable head 10 with the ground head 30 . The ground fitting 20 includes a conductive support plate 100 and a U-shaped conductive plate 200 .

The conductive support plate 100 is connected to the cable head 10 , the conductive support plate 100 is provided with a through hole 110 , and the cable head 10 is passed through the through hole 110 . The size of the through hole 110 can be set according to the size of the cable head 10 . Due to the presence of high voltage and low voltage in the power equipment, the size of the cable head 10 installed at high voltage and low voltage will be different. Therefore, the size of the through hole 110 required by different cable heads 10 is also different. The shape of the through hole 110 may be circular, oval or other irregular shapes. This embodiment does not impose any restrictions on the size and shape of the through hole 110 , as long as the cable head 10 can pass through the through hole 110 . The conductive support plate 100 and the cable head 10 are connected through the through hole 110, which can facilitate the removal of the conductive support plate 100 from the cable head 10 and the replacement of the conductive support plate 100. The flexibility of the conductive support plate 100 is improved. The material of the conductive support plate 100 is a material capable of conducting electricity, for example, the material of the conductive support plate 100 may be steel, or the material of the conductive support plate 100 is galvanized steel. Zinc plating on the outside of the steel can prevent the steel from rusting. The structure of the conductive support plate 100 may be a rectangular parallelepiped structure, or may be a cube or other irregular-shaped structure. The length of the conductive support plate 100 can be set according to the internal structure of the power device. If the internal structure of the power device is relatively large, the conductive support plate 100 can be set to a longer length; if the power device If the internal structure is relatively small, the length of the conductive support plate 100 can be set shorter. This embodiment does not impose any restrictions on the structure, type, length and material of the conductive support plate 100 , as long as the functions of the conductive support plate 100 can be realized.

The U-shaped conductive plate 200 is connected to the conductive support plate 100 , and the U-shaped conductive plate 200 and the conductive support plate 100 are surrounded to form a socket 210 , and the grounding head 30 is inserted into the socket. hole 210. The U-shaped conductive plate 200 is formed by bending a conductive plate into a U-shaped structure, and the plug 210 is penetrated. The opening of the U-shaped conductive plate 200 is opposite to the conductive support plate 100 . Both ends of the opening are connected to the conductive support plate 100 . Both ends of the opening and the conductive support rod 100 can be directly welded together, or can be movably connected together by other means such as screws. The active connection between the two ends of the opening of the U-shaped conductive plate 200 and the conductive support plate 100 can facilitate the disassembly of the U-shaped conductive plate 200 and the replacement of the U-shaped conductive plate 200. The flexibility of the U-shaped conductive plate 200 is improved. The size of the jack 210 can be set according to the size of the grounding head 30 . The size of the U-shaped conductive plate 200 can be set according to the size of the socket 210 . The material of the U-shaped conductive plate 200 is a material that can conduct electricity, for example, the material of the U-shaped conductive plate 200 is steel, or the material of the U-shaped conductive plate 200 is galvanized steel. Zinc plating on the outside of the steel can prevent the steel from rusting. The material of the U-shaped conductive plate 200 and the material of the conductive support rod 100 may be the same or different. If the materials of the conductive support plate 100 and the U-shaped conductive plate 200 are galvanized steel, the conductive The materials of the support plate 100 and the U-shaped conductive plate 200 can prevent rust, so that the use time of the conductive support plate 100 and the U-shaped conductive plate 200 can be improved, and the practicality of the grounding fitting 20 can be improved. sex. This embodiment does not impose any restrictions on the connection between the U-shaped conductive plate 200 and the conductive support plate 100 , and does not impose any restrictions on the size and material of the U-shaped conductive plate 200 . needs to choose.

The working principle of the ground fitting 20 is as follows:

The grounding fitting 20 is installed on the electrical equipment requiring maintenance. The conductive support plate 100 is connected to the cable head 10 of the power equipment. During maintenance, the grounding head 30 is inserted into the jack 210, so that the cable head 10 is grounded, thereby realizing the grounding of the electrical equipment.

In the grounding accessory, the grounding device, and the transformer provided in this embodiment, the grounding accessory 20 includes a conductive support plate 100 and a U-shaped conductive plate 200 . The conductive support plate 100 is connected to the cable head 10 , the conductive support plate 100 is provided with a through hole 110 , and the cable head 20 passes through the through hole 110 . The U-shaped conductive plate 200 is connected to the conductive support plate 100 , and surrounds the conductive support plate 100 to form an insertion hole 210 , and the grounding head 30 is inserted into the insertion hole 210 . The grounding accessory 20 provided in this embodiment uses the conductive support plate 100 and the U-shaped conductive plate 200. During maintenance and repair, the grounding head 30 is inserted into the U-shaped conductive plate 200 and the U-shaped conductive plate 200. The inside of the jack 210 formed by the conductive support plate 100 realizes the grounding of the cable head 10 , so as to realize the grounding of the power equipment and comply with the power safety work regulations. In this way, there is no need for maintenance personnel to enter the interior of the electrical equipment to install the grounding head 30, so that the electrical equipment is grounded, thereby avoiding potential safety hazards during maintenance. In addition, the grounding fitting 20 provided in this embodiment can be directly inserted on the cable head 10 through the through hole 110 opened in the conductive support plate 100 , and the operation is simple and convenient. At the same time, the grounding fitting 20 has a simple structure, convenient installation, easy acquisition of materials, and high practicability.

In one embodiment, the through hole 110 is opened on a side of the conductive support plate 100 away from the U-shaped conductive plate 200 . The through holes 110 and the U-shaped conductive plate 200 are located on two sides of the conductive support plate 100 respectively. During maintenance and inspection, such an arrangement can make the grounding fitting 20 more stable, and can improve the practicability of the grounding fitting 20 .

In one embodiment, the conductive support plate 100 and the U-shaped conductive plate 200 form an L-shaped structure, that is, the U-shaped conductive plate 200 is disposed on one side of the conductive support plate 100, and the conductive support The board 100 and the U-shaped conductive board 200 are arranged perpendicular to each other. The structure of the ground fitting 20 is an L-shaped structure. The grounding fitting 20 of the L-shaped structure is simple to set, more stable in use, and has higher practicability.

In one embodiment, the conductive support plate 100 and the U-shaped conductive plate 200 are made of copper. Copper has good conductivity, wide applicability and low cost, and tin can be plated on the surface of copper, which has the effect of anti-oxidation. Therefore, copper is used for the materials of the conductive support plate 100 and the U-shaped conductive plate 200 , which can improve the conductive performance of the grounding fittings, and has low cost and strong practicability.

Referring to FIG. 3 , an embodiment of the present application provides a grounding device 60 . The grounding device 60 includes the grounding fitting 20 and the grounding head 30 as described above. The grounding head 30 is inserted into the jack 210 . The ground fitting 20 includes the conductive support plate 100 and the U-shaped conductive plate 200 , and the U-shaped conductive plate 200 and the conductive support plate 100 form the insertion hole 210 . One end of the grounding head 30 is inserted inside the jack 210 , and the other end of the grounding head 30 is connected to an external grounding device, so as to realize the grounding of the grounding fitting 20 . The end of the grounding head 30 inserted into the jack 210 may be a duckbill structure, an arc structure or other irregular structures. This embodiment does not impose any restrictions on the structure and type of the grounding head 30 , and the user can determine the size of the socket 210 formed by the U-shaped conductive plate 200 and the conductive support plate 100 in the grounding accessory 20 according to the For size and structure, select the corresponding grounding head 30 . Since the grounding device 60 includes the grounding accessory 20 , the grounding device 60 has all the structures and beneficial effects of the grounding accessory 20 , and details are not described herein again.

In a specific embodiment, a membrane of the ground fitting 20 can be produced. The membrane includes the conductive support rod 100 and the U-shaped conductive plate 200 in the ground fitting 20 . When the grounding fitting 20 needs to be used, the grounding fitting 20 can be directly produced by using the film. Connect the part of the conductive support rod 100 of the grounding fitting 20 to the cable head 10 , and then insert the grounding head 30 into the U-shaped conductive plate 200 of the grounding fitting 20 and the conductive The socket 210 formed in the support plate 100 is used for grounding the cable head 10, thereby realizing the grounding of the power equipment.

Referring to FIG. 4 , in one embodiment, the grounding device 60 further includes an operation rod 40 . The operating rod 40 is connected to the grounding head 30 . The operating rod 40 is called an insulating rod, also known as a gram rod, an insulating pull rod, an operating rod, and the like. The operating rod 40 is composed of three parts: a working head, an operating rod and a handle. The outside of the operating rod 40 can be wrapped with an insulating layer, which can ensure the safety of maintenance personnel. Maintenance and inspection personnel use the operating rod 40 to insert the grounding head 30 into the insertion hole 210 formed by the conductive support plate 100 and the U-shaped conductive plate 200 , so that the grounding head 30 is more convenient to connect. Being inserted into the jack 210 can improve the practicability of the grounding device 60 .

Please continue to refer to FIG. 4 , in one embodiment, the grounding device 60 further includes a grounding wire 50 . The ground wire 50 is connected to the ground head 30 . The first end of the grounding wire 50 is connected to the grounding head 30 , and the second end of the grounding wire 50 is connected to a grounding device outside the power equipment. The grounding device external to the power device may be a grounding electrode. The ground electrode refers to a conductor or a combination of several conductors buried in the ground for connection with the ground. The ground electrode is a metal conductor or conductor group in direct contact with the soil. The ground electrodes can be divided into artificial ground electrodes and natural ground electrodes. The grounding electrode 34 acts as a conductor that is in close contact with the earth and provides electrical connection with the earth, and can safely dissipate the lightning energy so that it leaks into the earth. The length of the grounding wire 50 may be set according to the distance between the external grounding device and the grounding accessory 20 in an actual application environment. If the distance between the grounding device and the grounding fitting 20 is long, the grounding wire 50 needs to be longer; if the distance between the grounding device and the grounding fitting 20 is short, only A shorter ground wire 50 is required. The grounding wire 50 is an insulated wire wrapped with an insulating layer, so that safety accidents may occur when maintenance personnel accidentally touch the grounding wire 50 during work. This embodiment does not impose any restrictions on the length, type and material of the grounding wire 50, and the user can choose according to the actual application scenario.

During maintenance, connect the first end of the grounding wire 50 to the grounding head 30, and then insert the grounding head 30 into the jack 210, so that the grounding head 30 and the grounding head 30 are connected to the grounding head 30. The wire 50 is connected to the ground fitting 20 at the same time. The second end of the grounding wire 50 is connected to the grounding electrode, so that the grounding of the grounding fitting 20 can be realized, so that the cable head 10 is grounded.

In a specific embodiment, the working principle of the grounding device 60 is as follows:

First, install the grounding fitting 20 on the cable head 10 of the power equipment that needs to be grounded during maintenance; then, wrap the first end of the grounding wire 50 on the grounding head 30; Then use the operating rod 40 to insert the grounding head 30 wound with the grounding wire 50 into the jack 210, and finally connect the second end of the grounding wire 50 to the grounding electrode, so that The grounding of the cable head 10 can be realized, so that the electrical equipment to which the cable head 10 belongs can be grounded, which complies with electric safety work regulations, thereby avoiding potential safety hazards for maintenance personnel during work.

Referring to FIG. 5 , an embodiment of the present application provides a transformer 70 . The transformer 70 includes the grounding fitting 20 and the cable head 10 as described above. The cable head 10 passes through the through hole 110 . The transformer 70 is a power transformer, such as a compact box-type power station transformer. Since the transformer 70 includes the grounding fitting 20 , the transformer 70 has all the structures and the beneficial effects of the grounding fitting 20 , which will not be repeated here. The transformer 70 provided in this embodiment can realize the grounding of the transformer 70 through the grounding accessory 20, which conforms to the electrical safety work regulations.

In one embodiment, the cable head 10 is a low-voltage side cable head or a high-voltage side cable head. Since there may be high-voltage power transmission and low-voltage power transmission in the power equipment, and high-voltage power and low-voltage power may exist at the same time, the cable head 10 connected to the grounding fitting 20 may be the The low-voltage side cable head may also be the high-voltage side cable head. And there is more than one cable head 10 in the power equipment. If there are a plurality of the high-voltage side cable heads and a plurality of the low-voltage side cable heads in the power equipment, then each of the high-voltage side cable heads and each of the low-voltage side cable heads may be installed separately. By installing one of the grounding accessories 20 on it, the grounding of each of the high-voltage side cable heads and the grounding of each of the low-voltage side cable heads can be realized, so that the grounding of the transformer 70 can be realized.

Please continue to refer to FIG. 5 , in one embodiment, the cable head 10 includes a bolt 11 and a nut 12 . The bolts 11 are connected to the conductive support plate 100 . The nuts 12 are connected to the bolts 11 for fixing the conductive support plate 100 to the bolts 11 . If the conductive support plate 100 is provided with the through hole 110 , the bolt 11 can be passed through the through hole 110 , and the bolt 11 can be passed through the nut 12 , and the bolt 11 can be passed through the through hole 110 . When the nut 12 is tightened, the conductive support plate 100 can be fixed on the bolt 11 . Since the size of the cable head 10 may be different, the diameter of the bolt 11 may also be different, and the diameter of the nut 12 connected with the bolt 11 may also be different. This embodiment does not limit the size of the bolt 11 and the nut 12 . The user can select the size of the bolt 11 according to the actual situation, and the nut 12 is selected according to the size of the bolt 11 . Using the bolts 11 and the nuts 12 of the cable head 10 to fix the conductive support plate 100 on the cable head 10 can better utilize the resources of the cable head 10 itself to The conductive support plate 100 is fixed, so that the connection between the cable head 10 and the conductive support plate 100 is more convenient.

The working principle of the transformer 70 when it needs to be grounded is as follows:

Wear the grounding fitting 20 on the cable head 10 of the transformer 70 that needs maintenance and repair, and connect the grounding head 30 with the grounding fitting 20 to realize the grounding of the cable head 10, Therefore, the grounding of the transformer 70 can be realized.

The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, all It is considered to be the range described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent of the present application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (10)

1. A grounding fitting for enabling connection of a cable head (10) to a grounding head (30), the grounding fitting (20) comprising:

the conductive support plate (100) is connected with the cable head (10), a through hole (110) is formed in the conductive support plate (100), and the cable head (10) penetrates through the through hole (110);

the U-shaped conductive plate (200) is connected with the conductive support plate (100) and surrounds the conductive support plate (100) to form a jack (210), and the grounding head (30) is inserted into the jack (210).

2. The grounding fitting of claim 1, characterized in that the through hole (110) opens at a side of the conductive support plate (100) remote from the U-shaped conductive plate (200).

3. The grounding fitting of claim 1, characterized in that the conductive support plate (100) and the U-shaped conductive plate (200) constitute an L-shaped structure.

4. The grounding fitting of claim 1, characterized in that the material of the conductive support plate (100) and the U-shaped conductive plate (200) is copper.

5. An earthing device, characterized by comprising:

the grounding fitting (20) of any of claims 1 to 4;

and the grounding head (30) is inserted into the jack (210).

6. The grounding device of claim 5, further comprising:

and an operating rod (40) connected to the grounding head (30).

7. The grounding device of claim 5, further comprising:

and a ground lead (50) connected to the ground terminal (30).

8. A transformer, comprising:

the grounding fitting (20) of any of claims 1 to 4;

the cable head (10) penetrates through the through hole (110).

9. Transformer according to claim 8, wherein the cable head (10) comprises:

a bolt (11) connected with the conductive support plate (100);

and the nut (12) is connected with the bolt (11) and is used for fixing the conductive support plate (100) on the bolt (11).

10. Transformer according to claim 8, wherein the cable head (10) is a low-side cable head or a high-side cable head.

Images