CN216625096U - Novel 10kV cubical switchboard generating line ground connection device - Google Patents

Abstract

The utility model provides a novel 10kV switch cabinet bus grounding device, which comprises: the movable contact is fixed on the chassis through a connecting piece and is connected with a ground copper bar of the chassis through a connecting line, and the movable contact at least comprises three different radiuses; according to the utility model, the plum blossom-shaped contact is utilized to be in good contact with the bus static contact, so that the problem of poor grounding stability and safety of the traditional grounding wire is solved; the movable contacts with at least three different sizes are configured and replaced according to the sizes of the fixed contacts, so that the movable contact device can be suitable for the fixed contacts with different sizes, and the problem that the movable contacts with different sizes cannot be used universally is solved.

Description

Novel 10kV cubical switchboard generating line ground connection device

Technical Field

The utility model relates to the technical field of grounding devices, in particular to a novel 10kV switch cabinet bus grounding device.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The 10kV switch cabinet is a common switch device with a voltage class of 10kV, and is mainly used for opening, closing, controlling and protecting electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of a power system. At present, a common 10kV switch cabinet is mainly a middle-placed switch cabinet and is divided into a control room, a switch room and a cable room, wherein a handcart switch/isolation handcart is placed in the switch room, and the state of the handcart switch/isolation handcart comprises a working position, a test position and an overhaul position. Switching the 10kV line to maintenance operation, and switching on the 10kV line grounding knife switch; the 10kV switch is turned to maintenance operation, and a handcart switch needs to be pulled to a maintenance position; and (3) overhauling the 10kV bus, namely overhauling all 10kV lines, capacitors and voltage transformers on the bus, and then grounding the bus.

At present, an indoor bus bar type grounding device used by a 10kV switch cabinet mainly has two grounding modes, namely a grounding wire is arranged on a bus bar and is grounded through a bus grounding handcart. The mode of grounding through the bus grounding handcart means that the grounding handcart is pushed to a working position through the PT cabinet. The bus grounding handcart is completely configured in the newly built station, but different grounding handcarts cannot be used universally for bus static contacts with different sizes and different switch cabinet sizes.

The transformer substation which is long in operation time is provided with the grounding wire, the grounding wire can be grounded in a compression joint mode by opening the top cover of the bus, and the grounding wire can also be directly compressed and connected on the static contact of the PT cabinet. The bus top cover needs to be matched by maintainers when opened, the working process is complicated, and the operation time is prolonged by at least 20 minutes. With the increase of bus operation in the station, the existing grounding mode cannot meet the requirement of faster operation.

The grounding wire is hung on the static contact of the bus, so that the top cover can be prevented from being opened, although the time is short, the contact between the static contact of the bus and the moving contact of the grounding wire cannot be guaranteed to be good, the stability is poor, and the safety problem exists. Meanwhile, due to the fact that the bus fixed contacts are different in size, the existing grounding wire cannot guarantee that reliable grounding can be achieved on all the fixed contacts when in use.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a novel 10kV switch cabinet bus grounding device which utilizes a plum blossom-shaped contact to be in good contact with a bus static contact, so that the problems of poor grounding stability and poor safety of the traditional grounding wire are solved; the movable contacts with at least three different sizes are configured and replaced according to the size of the fixed contact, so that the movable contact can be suitable for the fixed contacts with different sizes, and the problem that the movable contacts with different sizes cannot be used universally is solved.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a novel 10kV cubical switchboard generating line ground connection device, includes: the movable contact is fixed on the chassis through a connecting piece and connected with a grounding copper bar of the chassis through a connecting line, and the movable contact at least comprises three different radiuses.

Furthermore, the contact fingers of the moving contact are fixed on the positioning ring by adopting a circular distribution structure and are compressed and fixed by adopting a spring.

Furthermore, the radius of each movable contact is 25mm, 35mm and 45mm in sequence.

Furthermore, the connecting piece is a contact supporting rod, and the contact supporting rod is fixedly connected with a vertical baffle on the chassis through a hoop.

Furthermore, the head of the contact supporting rod is provided with an annular clamping groove used for being fixed with the moving contact, and the bottom of the contact supporting rod is provided with a plurality of threaded holes used for being connected with the connecting wire.

Furthermore, a plurality of contact supporting rods are arranged in parallel.

Further, the connecting wire is a soft copper wire.

Further, the annealed copper wire is a 4 mm × 25mm sized annealed copper wire.

Furthermore, a plurality of wheels for moving the chassis are arranged at the bottom of the chassis.

Furthermore, the chassis is of an up-down telescopic structure.

Compared with the prior art, the utility model has the beneficial effects that:

1. the grounding handcart and the grounding wire are structurally improved by utilizing the advantages of the traditional grounding handcart and the grounding wire, and can be well contacted with a bus static contact by utilizing the plum blossom-shaped contact through changing the structure of a moving contact of the traditional grounding wire, so that the problems of poor grounding stability and poor safety of the traditional grounding wire are solved.

2. The utility model is provided with three moving contacts with different sizes, and the moving contacts are replaced according to the sizes of the static contacts, so that the moving contact device can be suitable for the static contacts with different sizes, and the problem that the moving contacts with different sizes cannot be used universally is solved.

3. The chassis of the grounding handcart is used for starting the insulating baffle, the telescopic chassis is adopted, the grounding handcart is suitable for different switch cabinet sizes, and meanwhile, the problem that the process of starting the bus top cover is complicated is solved by adopting grounding.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.

Fig. 1 is a schematic structural diagram of a novel 10kV switchgear bus grounding device provided by an embodiment of the present invention.

1-moving contact; 2-contact support bar; 3-vertical baffle; 4-a wheel body; 5-annealed copper wire; 6-a chassis unit; 7-anchor ear.

Detailed Description

The utility model is further described with reference to the following figures and examples.

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

Example 1:

as shown in fig. 1, embodiment 1 of the present invention provides a novel 10kV switchgear bus grounding apparatus, including: the contact unit, the chassis unit and the ground connection unit.

The contact unit has the main function of conducting a moving contact of the grounding device and a fixed contact of the bus bar; the chassis unit mainly has the function of opening a static contact insulating baffle of the busbar; the function of the grounding connection unit is to realize the connection of the contact and the chassis.

The contact unit adopts the structure of the movable contact 1 in the shape of a quincuncial pile, the whole contact adopts a silver-plated copper material, the contact fingers adopt a circular distribution structure and are fixed on the positioning ring, and the contact fingers are compressed and fixed by adopting a spring.

The circular structure contact can well contact with the bus fixed contact, and the grounding resistance meets the requirement through testing, so that the problem of poor grounding stability and reliability does not exist.

In view of the fact that the sizes of the conventional bus static contacts are different and mainly have three sizes of radius of 25mm, 35mm and 45mm, the device is respectively provided with the contacts with the three sizes and is replaced according to the bus contacts.

Meanwhile, the quincuncial pile contact finger is fixed by the spring, the extension of +/-0.5 mm radius can be realized, and the requirement on design error is basically met.

The chassis unit 6 is based on the traditional grounding handcart, removes the fixed contact structure, only keeps the chassis part, unlocks the switch cabinet insulation baffle lifting structure by using the mechanical structure of the chassis, and lifts the switch cabinet insulation baffle by the pressure of wheels in the traveling process; adopt extending structure, can satisfy different cubical switchboard size intervals, can make the chassis advance in different cubical switchboard.

And meanwhile, a grounding copper bar connected with a grounding device of the switch cabinet is arranged at the bottom of the chassis unit to realize grounding, the chassis unit is operated by a crank and is driven by a lead screw to push the chassis to advance.

The grounding connection unit is used for connecting the contact unit with the chassis unit, is connected with the quincuncial pile moving contact on one side and is connected with the chassis unit on the other side in a grounding soft copper wire mode, and integrates the whole device to realize grounding from the bus fixed contact to a grounding grid.

The grounding soft copper wire is flexibly connected and is not influenced by the distance between the fixed contacts of the buses after being connected with the moving contact, so that the problem that the fixed distance between the fixed contacts of the traditional grounding handcart cannot be used universally is solved. Meanwhile, the portable electric torch is convenient to carry and replace the contact.

After the novel 10kV switch cabinet bus grounding device is used, compared with a grounding mode of opening a bus top cover, the time consumed by bus grounding is reduced from 22 minutes to 3 minutes, and the time consumed by operation is greatly reduced.

Compared with the traditional grounding wire in a mode of being hung on a bus fixed contact for grounding, the replaceable quincuncial pile contact meets the requirements of different bus fixed contact sizes, realizes good grounding, solves the problems of unreliable and unsafe grounding, and ensures the safety of workers. For the ground connection handcart, the unable general problem of different cubical switchboard sizes and generating line static contact interval has been solved to the connected mode of annealed copper line.

The moving contact 1 described in this embodiment is fixed by using the clamping groove at the head of the contact supporting rod 2, and at the same time, the threaded hole at the bottom of the supporting rod is used for the connection of the annealed copper wire 5, and the contact unit is configured with three sizes of 25mm, 35mm and 45mm, and is fixed on the vertical baffle 3 on the chassis through the hoop 7.

In the embodiment, the back of the chassis unit is in contact with the switch cabinet by using the copper bar for grounding; connecting the contact unit and the chassis unit by adopting a soft copper wire of 4 mm multiplied by 25 mm;

the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a novel 10kV cubical switchboard generating line earthing device which characterized in that:

the method comprises the following steps: the movable contact is fixed on the chassis through a connecting piece and connected with a grounding copper bar of the chassis through a connecting line, and the movable contact at least comprises three different radiuses.

2. The novel 10kV switchgear bus grounding device of claim 1, characterized in that:

the contact fingers of the moving contact are fixed on the positioning ring by adopting a circular distribution structure and are compressed and fixed by adopting a spring.

3. The novel 10kV switchgear bus grounding device of claim 2, characterized in that:

the radius of each movable contact is 25mm, 35mm and 45mm in sequence.

4. The novel 10kV switchgear bus grounding device of claim 1, characterized in that:

the connecting piece is a contact supporting rod, and the contact supporting rod is fixedly connected with the vertical baffle on the chassis through a hoop.

5. The novel 10kV switchgear bus grounding device of claim 4, wherein:

the head of the contact supporting rod is provided with an annular clamping groove used for being fixed with the moving contact, and the bottom of the contact supporting rod is provided with a plurality of threaded holes used for being connected with a connecting wire.

6. The novel 10kV switchgear bus grounding device of claim 4, wherein:

a plurality of contact supporting rods are arranged in parallel.

7. The novel 10kV switchgear bus grounding device of claim 1, characterized in that:

the connecting wire is a soft copper wire.

8. The novel 10kV switchgear bus grounding device of claim 7, wherein:

the annealed copper wire is a 4 mm × 25mm annealed copper wire.

9. The novel 10kV switchgear bus grounding device of claim 1, characterized in that:

the bottom of the chassis is provided with a plurality of wheel bodies for the chassis to move.

10. The novel 10kV switchgear bus grounding device of claim 1, characterized in that:

the chassis is of an up-down telescopic structure.

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