CN219106532U - Secondary grounding wire of power voltage transformer - Google Patents

Abstract

The utility model relates to the field of electric power, in particular to a secondary grounding wire of an electric power voltage transformer, which aims to solve the problems that the connection of a secondary grounding wire pile and a secondary grounding wire of the current main current voltage transformer switch cabinet equipment is difficult, time-consuming and labor-consuming, and is extremely easy to loose, the connection is unreliable and easy to fall off, and the like, and the safe and reliable operation of a transformer substation is threatened; the earth connection operating head is a door style of calligraphy frame form, is connected with fixation nut on one lateral wall of earth connection operating head, is connected with the hob on another lateral wall of earth connection operating head, and this scheme uses secondary earth connection ground connection, convenient operation save time, connects safe and reliable, strengthens earth wire crimping department copper line intensity simultaneously, really avoids 10kv voltage transformer secondary to turn on the emergence of power, provides powerful guarantee for safety in production.

Description

Secondary grounding wire of power voltage transformer

Technical Field

The utility model relates to the field of power, in particular to a secondary grounding wire of a power voltage transformer.

Background

The protection grounding is a protection technical measure for preventing the metal shell of the electrical equipment and the electrical device from being electrified so as to endanger the personal safety and the equipment safety, and the metal shell of the electrical equipment is reliably connected with the grounding body by a wire under the possible failure or dangerous personal equipment safety state. After the electrical equipment (device) is reliably protected and grounded, under the strong shunt effect of the grounding body, the grounding short-circuit current flowing through the human body is greatly reduced, so that the risk of electric shock to the human body is avoided. However, if the connection of the secondary protection ground wire of the electrical equipment is unreliable, or the secondary ground wire is damaged in the use process, the protection effect is lost, and the maintenance personnel can be overhauled. Particularly, the secondary ground wire pile and the secondary ground wire of the voltage transformer switch cabinet equipment in the current stage commonly have the problems of unreliable connection, difficult connection, easy falling and the like. The situation that the secondary ground wire of the voltage transformer is loosened occurs in the use process, the equipment shell is electrified, the personal safety of operation and maintenance personnel is seriously threatened, so that how to reliably and safely install the secondary ground wire of the voltage transformer before equipment maintenance becomes one of important tasks of the operation and maintenance personnel, and meanwhile, the maintenance and management of the secondary ground wire are enhanced, the abrasion and even breakage in practical application are avoided, and the protection effect is reduced.

The ground wire is an indispensable way in electrical protection. When the electrical equipment is electrified in a leakage or induction way, strong current can flow into the ground through the grounding wire quickly, so that the metal shell of the equipment is not electrified any more, and the safety of personnel and equipment is ensured. The secondary ground wire pile and the secondary ground wire of the current mainstream voltage transformer switch cabinet equipment are difficult to connect, time-consuming and labor-consuming, and are extremely easy to loosen, so that the conditions of unreliable connection, easy falling and the like occur, and the safe and reliable operation of a transformer substation is threatened.

Disclosure of Invention

The utility model aims to: in order to solve the problems that the connection of a secondary ground wire pile and a secondary ground wire of the current mainstream voltage transformer switch cabinet equipment is difficult, time-consuming and labor-consuming, and meanwhile, the secondary ground wire pile and the secondary ground wire are very easy to loosen, the connection is unreliable, the connection is easy to fall off and the like, and the safe and reliable operation of a transformer substation is threatened, the secondary ground wire of the power voltage transformer is provided.

The utility model is implemented by the following scheme: the secondary grounding wire of the power voltage transformer comprises a grounding main wire, a grounding clamping piece, a plurality of grounding branch wires and a plurality of grounding wire operating heads;

one end of the grounding main line is connected with the grounding clamping piece, the other end of the grounding main line is connected with one end of a plurality of grounding branch lines, and the other end of each grounding branch line is connected with one grounding wire operation head; the grounding wire operation head is in a shape of a door frame, one side wall of the grounding wire operation head is connected with a fixing nut, and the other side wall of the grounding wire operation head is connected with a screw rod.

Further, the connection part of the grounding main line and the grounding clamping piece, the connection part of the grounding main line and each grounding branch line and the connection part of each grounding branch line and the grounding wire operation head connected with the grounding branch line are respectively connected through a heat shrinkage tube.

Still further, the outside of earth connection operation head is equipped with insulating protection layer.

Further, a polypropylene protective layer is arranged at the bottom of the ground wire operating head.

Still further, the tip of hob is equipped with insulating gasket, insulating gasket sets up in the outside of earth connection operation head.

Further, the outside of the grounding main line and the plurality of grounding branch lines is provided with an insulating material layer.

Still further, all be equipped with pvc material layer outside the earth main line and a plurality of earth branch line.

The beneficial effects are that:

this scheme uses this secondary earth connection ground connection, convenient operation save time, connects safe and reliable, strengthens earth wire crimping department copper line intensity simultaneously, really avoids 10kv voltage transformer secondary to turn over the emergence of power transmission, avoids unsafe factor in the operating personnel working process, provides powerful guarantee for safety in production. The scheme has the advantages of simplicity, convenience and rapidness in operation, high safety coefficient, low manufacturing cost, enhanced insulation and the like, ensures the reliability of long-term use of the ground wire, and improves the operation stability of the power system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of a secondary grounding wire of a power voltage transformer according to the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the purpose of facilitating an understanding of the embodiments of the utility model, reference will now be made to the drawings of several specific embodiments illustrated in the drawings and in no way should be taken to limit the embodiments of the utility model.

This embodiment will be described with reference to fig. 1.

The first embodiment is as follows: the secondary grounding wire of the power voltage transformer comprises a grounding main wire 1, a grounding clamping piece 2, a plurality of grounding branch wires 10 and a plurality of grounding wire operating heads 3;

one end of the grounding main line 1 is connected with the grounding clamping piece 2, the other end of the grounding main line 1 is connected with one end of a plurality of grounding branch lines 10, and the other end of each grounding branch line 10 is connected with one grounding wire operation head 3; the ground wire operation head 3 is in a shape of a door frame, one side wall of the ground wire operation head 3 is connected with a fixing nut 6, and the other side wall of the ground wire operation head 3 is connected with a screw rod 4.

The second embodiment is as follows: the secondary grounding wire of the power voltage transformer, the connection part of the grounding main wire 1 and the grounding clamping piece 2, the connection part of the grounding main wire 1 and each grounding branch wire 10 and the connection part of each grounding branch wire 10 and the grounding wire operation head 3 connected with the grounding branch wire 10 are respectively connected through a heat shrinkage tube 7.

The embodiment is the same as the first embodiment.

And a third specific embodiment: a secondary grounding wire of a power voltage transformer is characterized in that an insulating protective layer 9 is arranged outside a grounding wire operating head 3. .

The embodiment is the same as the first embodiment.

The specific embodiment IV is as follows: a secondary grounding wire of an electric voltage transformer is characterized in that a polypropylene protective layer is arranged at the bottom of an operation head 3 of the grounding wire.

The embodiment is the same as the first embodiment.

Fifth embodiment: the end part of the screw rod 4 is provided with an insulating gasket 5, and the insulating gasket 5 is arranged on the outer side of the grounding wire operating head 3.

The embodiment is the same as the first embodiment.

Specific embodiment six: the secondary grounding wire of the power voltage transformer is characterized in that an insulating material layer 8 is arranged outside the grounding main wire 1 and the plurality of grounding branch wires 10.

The embodiment is the same as the first embodiment.

Seventh embodiment: a pvc material layer is arranged outside the grounding main line 1 and the grounding branch lines 10.

The embodiment is the same as the first embodiment.

Working principle: the grounding main line and the ground wire branch line are stranded copper wire braids, the grounding clamping piece and the ground wire operation head are aluminum-made pressed conductors, the grounding main line is in welded connection with the grounding clamping piece, the ground wire branch line is in welded connection with the ground wire operation head, heat shrinkage tubes are sleeved outside all welding parts, insulation is enhanced, and attractiveness is improved. The outside of the heat shrinkage tube is further fixed by adopting a nut so as to ensure the long-term reliable use of the ground wire. For solving the problems of infirm installation and poor conductivity of the secondary ground wire in the past, the scheme is designed into a door-shaped structure at the ground wire operating head, namely, the ground wire operating head comprises an anti-falling groove, and meanwhile, a screw rod made of alloy steel and a colloid insulating gasket are additionally arranged, so that firm and reliable connection is ensured, the conductivity is good, and the working requirement is met. On the other hand, the operation and maintenance personnel need to wear the insulating glove when installing and removing the secondary grounding wire so as to improve the safety index.

The firmness analysis and the conductivity analysis are carried out on the secondary grounding wire of the power voltage transformer.

Fastness analysis: after the secondary grounding wire of the voltage transformer is installed and fixed, the voltage transformer is firm and reliable, and the phenomenon that the grounding wire falls off or loosens automatically due to the fact that the grounding wire is touched by mistake or dead weight in the working process is avoided. The tissue operation and maintenance personnel apply unequal tensile force with 5-30N to the ground wire operation head through the chest expander, and the separation and loosening phenomena occur through 40 times of experiments, so that the design scheme meets the requirement of the secondary ground wire firmness of the voltage transformer.

Conductivity analysis: after the secondary grounding wire of the voltage transformer is installed and fixed, the voltage transformer has good grounding conductivity. And 6 operation and maintenance personnel are organized to apply the newly developed secondary ground wire of the voltage transformer to 20 voltage class substations of 220 kilovolts and below respectively, and simultaneously, the secondary ground wire is measured by adopting a universal meter to check whether the secondary empty opening is conducted with the grounding end of the ground wire. The conductivity of the secondary ground wires of the 55 voltage transformer switch cabinets is measured, and the results are all provided with the conducting function.

The secondary grounding wire of the power voltage transformer designed by the utility model can completely meet the working requirement of a transformer substation, is firm and reliable in installation and has good grounding conductivity.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (7)

1. The utility model provides a power voltage transformer secondary earth connection which characterized in that: the device comprises a grounding main line (1), a grounding clamping piece (2), a plurality of grounding branch lines (10) and a plurality of grounding wire operating heads (3);

one end of the grounding main line (1) is connected with the grounding clamping piece (2), the other end of the grounding main line (1) is connected with one end of a plurality of grounding branch lines (10) in a grounding mode, and the other end of each grounding branch line (10) is connected with one grounding line operation head (3); the grounding wire operation head (3) is in a shape of a portal frame, one side wall of the grounding wire operation head (3) is connected with a fixing nut (6), and the other side wall of the grounding wire operation head (3) is connected with a screw rod (4).

2. The secondary ground wire of a power voltage transformer according to claim 1, wherein: the connection part of the grounding main line (1) and the grounding clamping piece (2), the connection part of the grounding main line (1) and each grounding branch line (10) and the connection part of the grounding wire operation head (3) connected with each grounding branch line (10) are respectively connected through a heat shrinkage tube (7).

3. The secondary ground wire of a power voltage transformer according to claim 1, wherein: an insulating protective layer (9) is arranged outside the ground wire operating head (3).

4. The secondary ground wire of a power voltage transformer according to claim 1, wherein: and a polypropylene protective layer is arranged at the bottom of the ground wire operating head (3).

5. The secondary ground wire of a power voltage transformer according to claim 1, wherein: the end of the screw rod (4) is provided with an insulating gasket (5), and the insulating gasket (5) is arranged on the outer side of the ground wire operating head (3).

6. The secondary ground wire of a power voltage transformer according to claim 1, wherein: the outside of the grounding main line (1) and the plurality of grounding branch lines (10) is provided with an insulating material layer (8).

7. The secondary ground wire of a power voltage transformer according to claim 1, wherein: the outside of the grounding main line (1) and the plurality of grounding branch lines (10) is provided with pvc material layers.

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