CN112038794B

CN112038794B - Grounding fitting, grounding device and transformer

Info

Publication number: CN112038794B
Application number: CN202010795469.4A
Authority: CN
Inventors: 杨翔翼; 邵心元; 徐娟; 郑庆梦; 王宏; 戴昊; 杨振宝; 薛志成; 崔志文; 巫伟南; 陈学有; 黄云杰; 彭文架
Original assignee: Shenzhen Power Supply Bureau Co Ltd
Current assignee: Shenzhen Power Supply Bureau Co Ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2022-07-22
Anticipated expiration: 2040-08-10
Also published as: CN112038794A

Abstract

The application relates to a grounding accessory, a grounding device and a transformer. The grounding accessory is used for realizing the connection of the cable head and the grounding head. The grounding fitting includes a conductive support plate and a conductive connection block. The conductive support plate is connected with the cable head. The conductive connecting block is connected with the conductive supporting plate, the conductive connecting block is provided with an insertion hole, and the grounding head is inserted into the insertion hole. 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 jack of the conductive connecting block, so that the grounding of the cable head is realized, the electric power safety working procedures are met, and the potential safety hazard existing in the maintenance and overhaul process can be avoided.

Description

Grounding fitting, grounding device and transformer

Technical Field

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

Background

According to the electric safety work regulations, when high-voltage electrical equipment is overhauled, grounding wires must be arranged on two sides of the possible incoming electricity of the overhauling equipment. However, for electric power equipment with a narrow space and a compact equipment structure, for example: a compact box station power transformer. When the power equipment needs to be overhauled, the internal space is limited because no special grounding point exists in the power equipment, and the existing grounding rod cannot be used for grounding operation.

In the conventional technology, a maintenance and repair person usually needs to wear an insulating glove to enter the power equipment needing to be detected, and an existing grounding head is installed in the power equipment so as to realize grounding of the power equipment. However, such operation presents a safety hazard.

Disclosure of Invention

In view of the above, it is necessary to provide a grounding fitting, a grounding device and a transformer for solving the above technical problems.

In one aspect, an embodiment of the present application provides a ground connection accessory for realizing connection of a cable head and a ground connection head, the ground connection accessory includes:

the conductive supporting plate is connected with the cable head;

the conductive connecting block is connected with the conductive supporting plate, the conductive connecting block is provided with a jack, and the grounding head is inserted into the jack.

In one embodiment, the conductive support plate is provided with a through hole, and the cable head is arranged through the through hole.

In one embodiment, the through hole is formed in one side, far away from the conductive connecting block, of the conductive supporting plate.

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

In another aspect, an embodiment of the present application provides a grounding device, including:

the grounding fitting as described above;

and the grounding head is inserted into the jack.

In one embodiment, the method further comprises the following steps:

and the operating rod is connected with the grounding head.

In one embodiment, the method further comprises the following steps:

and the grounding lead is connected with the grounding head.

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

the grounding fitting as described above;

and the cable head is connected with the conductive support plate.

In one embodiment, the cable head comprises:

the bolt is connected with the conductive support plate;

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

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

The grounding fitting comprises a conductive support plate and a conductive connecting block. The conductive support plate is connected with the cable head. The conductive connecting block is connected with the conductive supporting plate. The conductive connecting block is provided with a jack, and the grounding head is inserted into the jack. The grounding accessory provided by the embodiment uses the conductive support plate and the conductive connecting block, and when the grounding accessory is maintained and repaired, the grounding of the cable head is realized by inserting the grounding head into the jack of the conductive connecting block, so that the grounding of the power equipment can be realized, and the power safety working regulations are met. Need not like this to maintain the maintainer and get into the inside setting of power equipment makes power equipment ground connection can avoid the potential safety hazard that exists when maintaining and overhaul. Moreover, the grounding accessory provided by the embodiment is simple in structure, convenient to install, easy to obtain materials and high in practicability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a side view of a grounding assembly according to an embodiment of the present disclosure;

fig. 2 is a schematic front view of a grounding assembly according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a grounding device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a grounding device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a transformer according to an embodiment of the present application.

For example, in

Description of the reference numerals:

10. a cable head;

11. a bolt;

12. a nut;

20. a ground fitting;

30. a grounding head;

40. an operating rod;

50. a ground lead;

60. a grounding device;

70. a transformer;

100. a conductive support plate;

110. a through hole;

200. a conductive connecting block;

210. and (4) inserting the jack.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are 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. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.

The ordinal numbers used herein for the components, such as "first," "second," etc., are used merely to distinguish between the objects described, and do not have any sequential or technical meaning. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The grounding accessory provided by the embodiment of the application can be applied to power equipment with narrow space and compact equipment, for example: the compact box type station is provided with a power transformer, a first step-down GG-1AF type high-voltage switch cabinet and other power equipment. The grounding fitting is connected with a cable head in the power equipment, so that the grounding of the power equipment can be realized, and the power safety working rules are met.

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

Referring to fig. 1, one embodiment of the present application provides a grounding assembly 20. The grounding fitting 20 is used for connecting the cable head 10 with the grounding head 30. The ground fitting 20 includes a conductive support plate 100 and a conductive connection block 200.

The conductive support plate 100 is connected to the cable head 10. The conductive support plate 100 may be welded to the cable head 10, or the conductive support plate 100 may be movably connected to the cable head 10 by using screws or other methods. Electrically conductive backup pad 100 with swing joint between the cable head 10 can be convenient electrically conductive backup pad 100 follows dismantle on the cable head 10, and the replacement of electrically conductive backup pad 100 can improve electrically conductive backup pad 100's flexibility. The material of the conductive support plate 100 is a material capable of conducting electricity, such as: the conductive support plate 100 may be made of copper, or the conductive support plate 100 may be made of steel, or the conductive support plate 100 may be made of galvanized steel. The outside of the steel is galvanized, so that the steel can be prevented from rusting. The structure of the conductive support plate 100 may be a rectangular parallelepiped structure, or may be a cube or other irregular structure. The length of the conductive support plate 100 may be set according to the internal structure of the power equipment, and if the internal structure of the power equipment is relatively large, the length of the conductive support plate 100 may be set to be longer; if the internal structure of the power device is relatively small, the conductive support plate 100 may have a short length. The present embodiment does not set any limit to the structure, kind, length, material, etc. of the conductive support plate 100 as long as the function of the conductive support plate 100 can be achieved.

The conductive connecting block 200 is connected to the conductive supporting plate 100, the conductive connecting block 200 is provided with a jack 210, and the ground connector 30 is inserted into the jack 210. The conductive connecting block 200 and the conductive supporting rod 100 may be directly welded together, or may be movably connected together by screws or other methods. The conductive connection block 200 is movably connected with the conductive support plate 100, so that the conductive connection block 200 can be conveniently detached, and the conductive connection block 200 can be replaced, thereby improving the flexibility of the conductive connection block 200. The insertion hole 210 may be penetrated through the conductive connection block 200, or may not be penetrated through the conductive connection block 200, as long as the ground connector 30 can be inserted into the insertion hole 210. The size of the receptacle 210 may be set according to the size of the ground connector 30. The shape of the receptacle 210 may be circular, square, or other irregular shape. The conductive connection block 200 may be sized according to a desired size of the jack 210. The material of the conductive connecting block 200 is a material capable of conducting electricity, such as: the conductive connection block 200 is made of copper, the conductive connection block 200 is made of steel, or the conductive connection block 200 is made of galvanized steel. The outside of the steel is galvanized, so that the steel can be prevented from rusting. The material of the conductive connecting block 200 and the material of the conductive supporting rod 100 may both be copper or steel. The material of the conductive connection block 200 and the material of the conductive support bar 100 may be different, for example: the material of the conductive connecting block 200 is copper, the material of the conductive supporting rod 100 is steel, or the material of the conductive connecting block 200 is steel, and the material of the conductive supporting rod 200 is copper. If the material of electrically conductive backup pad 100 with electrically conductive connecting block 200 is the steel of zinc-plating, electrically conductive backup pad 100 with the material of electrically conductive connecting block 200 all can prevent to rust to can improve electrically conductive backup pad 100 with the live time of electrically conductive connecting block 200, and then can improve the practicality of ground connection accessory 20. In this embodiment, the connection manner between the conductive connection block 200 and the conductive support plate 100 is not limited, and the structure, size, type, material, etc. of the conductive connection block 200 are not limited, so that a user can select the connection manner according to actual requirements.

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

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

The grounding fitting 20 includes a conductive support plate 100 and a conductive connection block 200. The conductive support plate 100 is connected to the cable head 10. The conductive connection block 200 is connected to the conductive support plate 100. The conductive connection block 200 is provided with a jack 210, and the ground connector 30 is inserted into the jack 210. The grounding fitting 20 provided by this embodiment uses the conductive support plate 100 and the conductive connection block 200, and when performing maintenance and repair, the grounding head 30 is inserted into the insertion hole 210 of the conductive connection block 200, so that the grounding of the cable head 10 is realized, and the grounding of the electrical equipment can be realized, which conforms to the electrical safety work regulations. Therefore, maintenance and overhaul personnel are not needed to enter the power equipment, the grounding head 30 is installed inside the power equipment, the power equipment is grounded, and potential safety hazards existing in the process of maintenance and overhaul can be avoided. Moreover, the grounding accessory 20 provided by the embodiment has a simple structure, is convenient to install, is made of easily available materials, and has high practicability.

Referring to fig. 2, in one embodiment, the conductive supporting plate 100 is formed with a through hole 110, and the cable head 10 is inserted into the through hole 110. The size of the through hole 110 may be set according to the size of the cable head 10. Since high voltage and low voltage exist in the power equipment, the sizes of the cable heads 10 installed at high voltage and low voltage may be different, and thus, the sizes of the through holes 110 required for different cable heads 10 are also different. The through hole 110 may be circular, elliptical, or other irregular shape. In this embodiment, the size, shape, and the like of the through hole 110 are not limited, as long as the cable head 10 can be inserted into the through hole 110.

In one embodiment, the through hole 110 is opened at a side of the conductive support plate 100 away from the conductive connection block 200. The through hole 110 and the conductive connection block 200 are respectively located at both sides of the conductive support plate 100. Such an arrangement makes the ground fitting 20 more stable during maintenance and inspection, and improves the practicability of the ground fitting 20.

In one embodiment, the conductive support plate 100 and the conductive connection block 200 constitute an L-shaped structure, that is, the conductive connection block 200 is disposed at one side of the conductive support plate 100, and the conductive support plate 100 and the conductive connection block 200 are disposed perpendicular to each other. The ground fitting 20 is of an L-shaped configuration. The grounding fitting 20 of the L-shaped structure is simple to set, is more stable when used, and has higher practicability.

Referring to fig. 3, one 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 ground connector 30 is inserted into the insertion hole 210. The grounding fitting 20 comprises the conductive support plate 100 and the conductive connection block 200, and the insertion hole 210 is opened on the conductive connection block 200. One end of the ground connector 30 is inserted into the insertion hole 210, and the other end of the ground connector 30 is connected to an external ground device, so as to ground the ground fitting 20. The end of the ground plug 30 inserted into the insertion hole 210 may have a duckbill structure, an arc structure or other irregular structures. The present embodiment does not limit the structure, type, etc. of the ground connector 30, and a user can select the corresponding ground connector 30 according to the size and structure of the insertion hole 210 of the conductive connection block 200 in the ground fitting 20. Since the grounding device 60 includes the grounding assembly 20, the grounding device 60 has all the structures and advantages of the grounding assembly 20, which will not be described herein again.

In a specific embodiment, a membrane of the grounding fitting 20 may be produced. The membrane includes the conductive support rod 100 and the conductive connection block 200 in the ground fitting 20. When the grounding fitting 20 is required to be used, the membrane may be directly used to produce the grounding fitting 20. The portion of the conductive support rod 100 of the grounding accessory 20 is connected to the cable head 10, and then the grounding head 30 is inserted into the insertion hole 210 of the portion of the conductive connection block 200 of the grounding accessory 20, so as to achieve grounding of the cable head 10, thereby achieving grounding of the power equipment.

Referring to fig. 4, in one embodiment, the grounding device 60 further includes an operating rod 40. The operation rod 40 is connected to the ground connection 30. The operating rod 40 is called an insulating rod, also called a link rod, an insulating pull rod, an operating rod and the like. The operating rod 40 is composed of three parts, namely a working head, an operating rod and a handle. The outside of the operating rod 40 can be wrapped with an insulating layer, so that the safety of maintenance and repair personnel can be ensured. The maintenance and inspection personnel use the operating rod 40 to insert the grounding head 30 into the insertion hole 210 of the grounding accessory 20, so that the grounding head 30 can be more conveniently inserted into the insertion hole 210, and the practicability of the grounding device 60 can be improved.

With continued reference to fig. 4, in one embodiment, the grounding device 60 further includes a grounding wire 50. The ground lead 50 is connected to the ground terminal 30. A first end of the ground wire 50 is connected to the ground connector 30, and a second end of the ground wire 50 is connected to a ground device outside the power apparatus. 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 so as to be connected to the ground. The grounding electrode is a metal conductor or a conductor group which is in direct contact with soil. The grounding electrode can be divided into an artificial grounding electrode and a natural grounding electrode. The earth electrode 34 serves as a conductor which is in close contact with the earth and provides an electrical connection with the earth, and can safely dissipate the energy of the lightning to the earth. The length of the grounding conductor 50 may be set according to the distance between the grounding device and the grounding fitting 20 outside the practical application environment. If the distance between the grounding device and the grounding fitting 20 is long, the grounding wire 50 is required to be long; if the grounding device is placed closer to the grounding fitting 20, a shorter grounding conductor 50 is needed. The grounding wire 50 is an insulated wire wrapped with an insulating layer, so that a maintenance and repair worker can be prevented from carelessly touching the grounding wire 50 to cause safety accidents. The length, type, material, etc. of the grounding conductor 50 are not limited in this embodiment, and a user can select the grounding conductor according to an actual application scenario.

During maintenance and repair, the first end of the ground wire 50 is connected to the ground head 30, and then the ground head 30 is inserted into the insertion hole 210, so that the ground head 30 and the ground wire 50 are simultaneously connected to the ground fitting 20. A second end of the grounding wire 50 is connected to the grounding electrode, so that the grounding of the grounding fitting 20 can be achieved, and the cable head 10 can be grounded.

In a specific embodiment, the grounding device 60 operates as follows:

firstly, the grounding fitting 20 is installed on the cable head 10 of the electric power equipment which needs to be grounded in maintenance and repair; then, a first end of the ground wire 50 is wound on the ground tab 30; and then the operating rod 40 is used for inserting the grounding head 30 wound with the grounding wire 50 into the jack 210, and finally the second end of the grounding wire 50 is connected with the grounding electrode, so that the grounding of the cable head 10 can be realized, the grounding of the power equipment to which the cable head 10 belongs can be realized, the electric power safety working regulations are met, and the potential safety hazard of maintenance and repair personnel during working is avoided.

Referring to fig. 5, one embodiment of the present application provides a transformer 70, wherein the transformer 70 includes the grounding fitting 20 and the cable head 10 as described above. The cable head 10 and the conductive support plate 100 are connected to the transformer 70, which is a power transformer, for example: a transformer for a compact box-type power station. Since the transformer 70 includes the grounding assembly 20, the transformer 70 has all the structures and the advantages of the grounding assembly 20, and thus, the detailed description thereof is omitted. The transformer 70 provided by the embodiment can realize grounding of the transformer 70 through the grounding accessory 20, and conforms to the electric power 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 transmission of high voltage electricity and low voltage electricity in the power equipment, and both high voltage electricity and low voltage electricity may exist at the same time, the cable head 10 connected to the grounding fitting 20 may be the low-voltage side cable head or the high-voltage side cable head. And more than one cable head 10 in the electrical device. If there are a plurality of high-voltage side cable heads and a plurality of low-voltage side cable heads in the power equipment, the grounding accessory 20 may be installed on each of the high-voltage side cable heads and the low-voltage side cable heads, so as to realize grounding of each of the high-voltage side cable heads and each of the low-voltage side cable heads, thereby realizing grounding of the transformer 70.

With continued reference to fig. 5, in one embodiment, the cable head 10 includes a bolt 11 and a nut 12. The bolt 11 is connected to the conductive support plate 100. The nut 12 is connected to the bolt 11, and is used for fixing the conductive support plate 100 to the bolt 11. If the through hole 110 is formed in the conductive support plate 100, the bolt 11 may be inserted into the through hole 110, and the conductive support plate 100 may be fixed to the bolt 11 by inserting the bolt 11 into the nut 12 and tightening the nut 12. Since the cable heads 10 may have different sizes, the diameter of the bolt 11 may be different, and the diameter of the nut 12 connected to the bolt 11 may be different. In this embodiment, the sizes of the bolt 11 and the nut 12 are not limited at all, and a user may select the size of the bolt 11 according to actual conditions, and the nut 12 is selected according to the size of the bolt 11. Use the cable head 10 itself have the bolt 11 with the nut 12 will electrically conductive backup pad 100 is fixed on the cable head 10, can be better utilize the resource of cable head 10 itself is right electrically conductive backup pad 100 is fixed, makes the cable head 10 with it is more convenient to electrically conductive connection between the backup pad 100.

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

the grounding fitting 20 is installed on the cable head 10 of the transformer 70 requiring maintenance and repair, and the grounding head 30 is connected to the grounding fitting 20 to realize grounding of the cable head 10, so that grounding of the transformer 70 can be realized.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims

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 movably connected with the cable head (10); the conductive support plate (100) is provided with a through hole (110), and the cable head (10) penetrates through the through hole (110); the cable head (10) comprises a bolt (11) and a nut (12), the bolt (11) is arranged in the through hole (110) in a penetrating manner, the bolt (11) is arranged in the nut (12) in a penetrating manner, and the nut (12) is screwed tightly, so that the conductive support plate (100) can be fixed on the bolt (11);

the conductive connecting block (200) is movably connected with the conductive supporting plate (100), a jack (210) is formed in the conductive connecting block (200), and the grounding head (30) is inserted into the jack (210).

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

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

4. The grounding fitting according to claim 1, characterized in that the material of the conductive support plate (100) is a material capable of conducting electricity.

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;

and the cable head (10) is connected with the conductive support plate (100).

9. The transformer according to claim 8, characterized in that the cable head comprises a bolt (11) and a nut (12); the size of the nut (12) is determined according to the size of 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.