CN112038793B

CN112038793B - Grounding fitting, grounding device and transformer

Info

Publication number: CN112038793B
Application number: CN202010794971.3A
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: CN112038793A

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 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 accessory, 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 type 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 insulating gloves to enter the power equipment needing to be detected, and an existing grounding head is installed in the power equipment so as to realize the 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 that a cable head is connected with a ground connection head, the ground connection accessory includes:

the conductive supporting plate is connected with the cable head, a through hole is formed in the conductive supporting plate, and the cable head penetrates through the through hole;

the U-shaped conductive plate is connected with the conductive support plate and surrounds the conductive support plate to form a jack, and the grounding head is inserted into the jack.

In one embodiment, the through hole is opened at one side of the conductive support plate far 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 material of the conductive support plate and the U-shaped conductive plate is copper.

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 arranged in the through hole in a penetrating manner.

In one embodiment, the cable head includes:

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 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 is surrounded with the conductive support plate to form 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 U-shaped conductive plate, and when maintenance and repair are performed, the grounding head is inserted into the jack formed by the U-shaped conductive plate and the conductive support plate, so that grounding of the cable head is realized, grounding of the power equipment can be realized, and electric power safety working rules are met. Need not the access of maintenance and repair personnel like this the inside setting of power equipment makes power equipment ground connection can avoid the potential safety hazard that exists when the maintenance and repair. In addition, the grounding accessory provided by the embodiment can be directly arranged on the cable head in a penetrating manner through the through hole formed in the conductive supporting plate, and the operation is simple and convenient. Meanwhile, the grounding accessory 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 following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these 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

Description of 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 U-shaped conductive plate;

210. and (7) 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 numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). 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 are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean 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 power transformers, first step-down GG-1AF type high-voltage switch cabinets and other power equipment. The grounding accessory 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 regulations are met.

The following describes the technical solution of the present application and how to solve the above technical problems in detail by using specific embodiments. 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 and 2, one embodiment of the present application provides a grounding assembly 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 with the cable head 10, the conductive support plate 100 is provided with a through hole 110, and the cable head 10 is arranged in the through hole 110 in a penetrating manner. 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 shape of the through hole 110 may be circular, or may be oval or other irregular shapes. 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. Electrically conductive backup pad 100 with pass through between the cable head 10 the through-hole 110 is connected, can be convenient electrically conductive backup pad 100 is followed 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 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 a cube or other irregular-shaped 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 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 surround to form an insertion hole 210, and the ground connector 30 is inserted into the insertion hole 210. The U-shaped conductive plate 200 is formed by bending a conductive plate into a U-shaped structure, and the insertion 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. The two ends of the opening and the conductive support rod 100 may be directly welded together, or may be movably connected together by screws or other means. The both ends of the opening part of the U-shaped conductive plate 200 and the movable connection between the conductive support plates 100 can facilitate the disassembly of the U-shaped conductive plate 200 and the replacement of the U-shaped conductive plate 200, and the flexibility of the U-shaped conductive plate 200 can be improved. The size of the receptacle 210 may be set according to the size of the ground connector 30. The U-shaped conductive plate 200 may be sized according to the size of the insertion hole 210. The U-shaped conductive plate 200 is made of a conductive material, such as: the U-shaped conductive plate 200 is made of steel, or the U-shaped conductive plate 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 U type current conducting plate 200 with the material of electrically conductive bracing piece 100 can be the same also can be different, if electrically conductive backup pad 100 with the material of U type current conducting plate 200 is galvanized steel, electrically conductive backup pad 100 with the material of U type current conducting plate 200 all can prevent to rust, thereby can improve electrically conductive backup pad 100 with the live time of U type current conducting plate 200, and then can improve the practicality of ground connection accessory 20. In this embodiment, the connection manner between the U-shaped conductive plate 200 and the conductive support plate 100 is not limited at all, and the size, material, etc. of the U-shaped conductive plate 200 are not limited at all, 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.

In the grounding fitting, the grounding device and the transformer provided by the present embodiment, the grounding fitting 20 includes a conductive support plate 100 and a U-shaped conductive plate 200. The conductive support plate 100 is connected with the cable head 10, the conductive support plate 100 is provided with a through hole 110, and the cable head 20 is arranged in the through hole 110 in a penetrating manner. The U-shaped conductive plate 200 is connected to the conductive support plate 100, and surrounds the conductive support plate 100 to form a plug hole 210, and the ground plug 30 is inserted into the plug hole 210. In the grounding fitting 20 provided by this embodiment, the conductive support plate 100 and the U-shaped conductive plate 200 are used, and when maintenance and repair are performed, the grounding head 30 is inserted into the insertion hole 210 formed by the U-shaped conductive plate 200 and the conductive support plate 100, so that grounding of the cable head 10 is achieved, and grounding of the power equipment can be achieved, and the power safety work rules are met. 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 this embodiment can be directly inserted into the cable head 10 through the through hole 110 formed in the conductive support plate 100, and is simple and convenient to operate. Meanwhile, the grounding accessory 20 has a simple structure, is convenient to install, is made of easily available materials, and has high practicability.

In one embodiment, the through hole 110 is opened at a side of the conductive support plate 100 away from the U-shaped conductive plate 200. The through hole 110 and the U-shaped conductive plate 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 U-shaped conductive plate 200 form an L-shaped structure, that is, the U-shaped conductive plate 200 is disposed at one side of the conductive support plate 100, and the conductive support plate 100 and the U-shaped conductive plate 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.

In one embodiment, the material of the conductive support plate 100 and the U-shaped conductive plate 200 is copper. The copper has good conductivity, wide application and low cost, and the surface of the copper can be plated with tin, so that the copper has an anti-oxidation effect. Therefore, the conductive support plate 100 and the U-shaped conductive plate 200 are made of copper, so that the conductivity of the grounding fitting can be improved, and the grounding fitting is low in cost and high in 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 includes therein 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 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 accessory 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, kind, 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 formed by the U-shaped conductive plate 200 and the conductive support plate 100 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, and will not be described in detail herein.

In a specific embodiment, a membrane of the grounding fitting 20 may 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 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 formed by the U-shaped conductive plate 200 and the conductive support plate 100 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 operating 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, etc. The operating rod 40 is composed of three parts, namely a working head, an operating rod and a handle. The outside of operating rod 40 can be wrapped up with the insulating layer, can guarantee maintenance repair personnel's safety. The 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 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 equipment. The grounding device external to the power device may be a ground 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 earth electrode is a metal conductor or group of conductors in direct contact with the 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 to the earth, and thus can safely dissipate lightning energy into 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 conductor 50 is an insulated conductor wrapped with an insulating layer, so that a maintenance and repair person can be prevented from accidentally touching the grounding conductor 50 during working and causing safety accidents. The present embodiment does not limit the length, type, material, etc. of the ground wire 50, and the user can select the length, type, material, etc. according to the actual application scenario.

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

In one 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 is inserted into the through hole 110. The transformer 70 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 there may be transmission of high voltage electricity and low voltage electricity 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. The cable head 10 is provided with the bolt 11 and the nut 12 to fix the conductive support plate 100 on the cable head 10, so that the conductive support plate 100 can be fixed by using the resources of the cable head 10, and the connection between the cable head 10 and the conductive support plate 100 is more convenient.

The working principle of the transformer 70 when grounding is needed is as follows:

the grounding fitting 20 is arranged on the cable head 10 of the transformer 70 needing maintenance and repair in a penetrating manner, and the grounding head 30 is connected with the grounding fitting 20 to realize grounding of the cable head 10, so that grounding of the transformer 70 can be realized.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification 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 accessory for enabling connection of a cable head (10) to a grounding head (30), the grounding accessory (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 cable head (10) comprises: a bolt (11) connected with the conductive support plate (100); a nut (12) connected to the bolt (11) for fixing the conductive support plate (100) to the bolt (11);

the U-shaped conductive plate (200), the U-shaped conductive plate (200) is formed by bending a conductive plate into a U-shaped structure, the opening of the U-shaped conductive plate (200) is opposite to the conductive support plate (100), the two ends of the opening of the U-shaped conductive plate (200) are connected with the conductive support plate (100), the conductive support plate (100) is surrounded 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 a grounding head (30) 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) as claimed in any of claims 1 to 4;

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

9. The transformer according to claim 8, characterized in that the cable head (10) 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.