CN106450824B

CN106450824B - Grounded screen

Info

Publication number: CN106450824B
Application number: CN201610912758.1A
Authority: CN
Inventors: 丁仃; 郑亚锋; 王春雨; 屠学伟; 卢海彬; 朱孟强; 刘华; 柳华
Original assignee: China Nuclear (beijing) Nuclear Power Island And Power Engineering Research Center Co Ltd; State Nuclear Electric Power Planning Design and Research Institute Co Ltd
Current assignee: China Nuclear (beijing) Nuclear Power Island And Power Engineering Research Center Co Ltd; State Nuclear Electric Power Planning Design and Research Institute Co Ltd
Priority date: 2016-10-19
Filing date: 2016-10-19
Publication date: 2018-12-18
Anticipated expiration: 2036-10-19
Also published as: CN106450824A

Abstract

The invention discloses a kind of grounded screens, belong to electric field.The grounded screen includes: backbone network and at least one set of earthing pole, every group of earthing pole includes at least one earthing pole, at least one set of earthing pole is connected on the different location of backbone network, and it is respectively positioned on the lower section of backbone network, backbone network is arranged below building, and the soil of backbone network and surrounding insulate, grounded screen is discharged by earthing pole, at least one tie point is provided on backbone network, for connecting with electrical equipment, each earthing pole at least one set of earthing pole is set in ground connection well.By the way that at least one set of earthing pole is arranged below backbone network, each earthing pole at least one set of earthing pole is arranged in ground connection well, and backbone network and the soil of surrounding is made to insulate, so that grounded screen can only be discharged in ground connection well by earthing pole, it that is to say and discharge in deep under ground, it avoids and forms step voltage on ground, danger will not be caused to the pedestrian on ground, improve the safety of grounded screen.

Description

Grounded screen

Technical field

The present invention relates to electric field, in particular to a kind of grounded screen.

Background technique

In daily life, either electrical equipment or superstructure require to be drained to ground for electric current by grounded screen Under, to complete to discharge, thereby protect equipment safety and personal safety.

In the prior art, usually it is arranged the metal grill of double-edged fine-toothed comb type as grounded screen in 0.8 meter of underground of building, and Tie point is arranged on metal grill to connect with the equipment in building, and Grounding Grids are set on metal grill, thus will The electric current of equipment is drained to Grounding Grids by metal grill in building, and is released electric current by metal grill and Grounding Grids It puts to ground and deep under ground, while forming step voltage on ground and (entering pedestrian's bipod around place positioned at earth current Between voltage), to complete to discharge.

In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:

During discharging by metal grill and Grounding Grids, step voltage can be formed on ground, on ground Pedestrian cause the danger of electric shock, safety is lower.

Summary of the invention

In order to solve problems in the prior art, the embodiment of the invention provides a kind of grounded screens.The technical solution is as follows:

On the one hand, a kind of grounded screen is provided, the grounded screen includes backbone network and at least one set of earthing pole, every group of ground connection Pole includes at least one earthing pole, and at least one set earthing pole is connected on the different location of the backbone network, described At least one set of earthing pole is respectively positioned on the lower section of the backbone network；

The backbone network is arranged below building, and the soil of the backbone network and surrounding insulate, and the grounded screen passes through institute State at least one set of earthing pole electric discharge；

At least one tie point is provided on the backbone network, for connecting with electrical equipment；

Each earthing pole in at least one set earthing pole is set in ground connection well.

Optionally, the backbone network is matrix pattern backbone network, and at least one set earthing pole includes five groups of earthing poles, respectively The center and four corners of the backbone network are set.

Optionally, include seven earthing poles in every group of earthing pole, seven earthing poles include center pole and Six satellite poles；

Six satellites are extremely equidistantly circumferentially arranged around the center pole.

Optionally, distance is 3-5 meters between the center pole and any satellite pole.

Optionally, each earthing pole is embedded in ground connection well of the depth greater than 3 meters.

Optionally, the backbone network is arranged in the trench below building by the way of bracket.

Optionally, the outer surface of the backbone network is provided with insulating layer.

Optionally, the backbone network is zinc-coated flat steel sheet or red copper cable.

Technical solution provided in an embodiment of the present invention has the benefit that

By the way that at least one set of earthing pole is arranged below backbone network, each earthing pole at least one set of earthing pole is respectively provided with In ground connection well, and backbone network and the soil of surrounding is made to insulate so that grounded screen can only by earthing pole in ground connection well into Row electric discharge, that is to say and discharge in deep under ground, avoids and forms step voltage on ground, will not make to the pedestrian on ground At danger, the safety of grounded screen is improved.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.

Fig. 1 is a kind of structural schematic diagram of grounded screen provided in an embodiment of the present invention；

Fig. 2 is a kind of structural schematic diagram of grounded screen provided in an embodiment of the present invention；

Fig. 3 is the structural schematic diagram of one group of earthing pole in a kind of grounded screen provided in an embodiment of the present invention.

Specific embodiment

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention Formula is described in further detail.

Fig. 1 is a kind of structural schematic diagram of grounded screen provided in an embodiment of the present invention, and referring to Fig. 1, which includes: bone Dry net 10 and at least one set of earthing pole 20, every group of earthing pole 20 include at least one earthing pole 20.

Wherein, material used by backbone network 10 can be zinc-coated flat steel sheet, red copper cable, copper strips or copper bar, the present invention Embodiment does not limit this.

Moreover, at least one set earthing pole 20 is connected on the different location of backbone network 10, each earthing pole 20 can Think drainage type earthing pole, or other earthing poles, it is not limited in the embodiment of the present invention.

Specifically, the setting of backbone network 10 is provided at least one tie point below building, and on the backbone network 10, should Backbone network 10 is also connect at least one set of earthing pole 20, and every group of earthing pole 20 is arranged in the lower section of backbone network 10.

Wherein, the electrical equipment in building can be connected to the connection of backbone network 10 by the down conductor of electrical equipment Point, to be connect with the backbone network 10.Moreover, being separated by several meters between two neighboring tie point, between two neighboring tie point Distance can be configured according to the size of backbone network 10, and it is not limited in the embodiment of the present invention.

Moreover, the section of backbone network 10 needs to meet certain requirements, prevent the electric current for flowing through backbone network 10 excessive, thus right Backbone network 10 damages.For example, the maximum current of backbone network 10 allowed to flow through has to be larger than all electrical equipments in building The summation of earth current.

It, can will be every at least one set of earthing pole 20 in addition, after at least one set of earthing pole 20 is connected to backbone network 10 A earthing pole 20 is arranged in pre-set ground connection well.Preferably, earthing pole 20 can be embedded in ground connection well, and every The depth of the embedding ground connection well of a earthing pole 20 is typically larger than 3 meters.

Wherein it is possible to Inspection and maintenance opening and cover board be arranged, on each ground connection well so as in the follow-up process to ground connection Net is safeguarded.

Further, the bottom of the ground connection well is water, middle section is soil, top is air, then each earthing pole 20 Top contacted with air, middle section is contacted with soil, end is contacted with water, thus by least one earthing pole 20 and soil Earth and water contact are completed to discharge in deep under ground.

Moreover, when grounded screen is for a long time after underground buried, it, may be by since earthing pole 20 is contacted with soil and water Corrosion can then replace earthing pole 20 in ground connection well, to ensure that the discharge effect of grounded screen.

It should be noted that the soil of backbone network 10 and surrounding insulate when backbone network 10 is arranged below building, so that Grounded screen can not be discharged when being discharged by backbone network 10, can only be grounded by at least one set connecting with backbone network 10 Pole 20 is discharged, and is discharged the problem of forming step voltage so as to avoid grounded screen in earth's surface.Moreover, because backbone network 10 and soil Insulation, the case where will not contacting with soil or water, then be not in galvano-cautery or chemical attack, increases making for backbone network 10 Use the service life.

Wherein it is possible to backbone network 10 is arranged in the trench below building by the way of bracket, it can also be in backbone Insulating layer is arranged in the outer surface of net 10, to guarantee that the soil of backbone network 10 and surrounding insulate, can also use its other party certainly Formula guarantees that the soil of backbone network 10 and surrounding insulate, and it is not limited in the embodiment of the present invention.

In conclusion grounded screen provided in an embodiment of the present invention, by the way that at least one set of earthing pole is arranged below backbone network, Each earthing pole at least one set of earthing pole is arranged in ground connection well, and backbone network and the soil of surrounding is made to insulate, and is made Obtaining grounded screen can only be discharged in ground connection well by earthing pole, be that is to say and discharged in deep under ground, avoid on ground Face forms step voltage, will not cause danger to the pedestrian on ground, improve the safety of grounded screen.

In another embodiment, as shown in Fig. 2, the backbone network 10 can be matrix pattern backbone network 10, and at least one set Earthing pole 20 may include five groups of earthing poles 20, be separately positioned on the center and four corners of the backbone network 10.

Specifically, backbone network 10 can be set to rectangle, circle or other shapes, and superstructure is generally rectangular, Therefore rectangle usually is set by backbone network 10, and the area of backbone network 10 is consistent with the occupied area of superstructure.Into one Step ground, connect with backbone network 10 for the ease of the electrical equipment in building, can set matrix pattern backbone network for backbone network 10 10。

In addition, when being discharged due to grounded screen, the electric current in backbone network 10 is high-frequency current, and high-frequency current can be There is the phenomenon that current reflux in the junction of backbone network 10 and corner, can also generate collection skin phenomenon.Therefore, it is necessary in field word One group of earthing pole 20 is respectively set in the center of shape backbone network 10 and four corner settings, to pass through 20 pairs of electricity of each group earthing pole Stream carries out drainage electric discharge.

Certainly, there is also junctions, the i.e. central cross of matrix pattern backbone 10 on the quadrilateral frame of matrix pattern backbone network 10 The junction of shape backbone and the frame on four side of surrounding, therefore can also be in each connection of the quadrilateral frame of matrix pattern backbone network 10 Place is also provided with one group of earthing pole 20, and it is not limited in the embodiment of the present invention.

In another embodiment, as shown in figure 3, may include seven earthing poles 20 in every group of earthing pole 20, this seven It may include a center pole 201 and six satellite poles 202 in earthing pole 20, the top of six satellite pole 202 is and center pole 201 top connection.

Wherein, six satellite poles 202 are equidistantly circumferentially arranged around center pole 201, that is to say a center pole 201 It arranges with six satellite poles 202 in honeycomb, and a center pole 201 and six satellite poles 202 are located at the same water In plane.

It should be noted that distance can determine according to the conductivity of soil between the center pole 201 and any satellite pole 202 Fixed, the conductivity of soil is higher, and the distance between center pole 201 and satellite pole 202 are then smaller, usual center pole 201 and satellite The distance between pole 202 range is 3-5 meters, naturally it is also possible to be other length, it is not limited in the embodiment of the present invention.

All the above alternatives can form alternative embodiment of the invention using any combination, herein no longer It repeats one by one.

The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims

1. A grounding network, characterized in that, the grounding network comprises a backbone network and at least one group of grounding electrodes, each group of grounding electrodes comprises at least one grounding electrode, and the at least one group of grounding electrodes is respectively connected to the backbone network At different positions, the at least one set of ground electrodes are located below the backbone network;

The backbone network is arranged under the building, the backbone network is insulated from the surrounding soil, and the grounding network is discharged through the at least one group of grounding electrodes;

At least one connection point is set on the backbone network for connecting with electrical equipment;

Each ground electrode of the at least one set of ground electrodes is disposed in a ground well;

The backbone network is a square-shaped backbone network, and the at least one set of ground electrodes includes five sets of ground electrodes, which are respectively arranged in the center and four corners of the backbone network;

Each group of ground electrodes includes seven ground electrodes, and the seven ground electrodes include a center pole and six satellite poles;

The six satellite poles are equidistantly arranged around the center pole in the circumferential direction, and the six satellite poles are connected in sequence.

2. The grounding grid according to claim 1, wherein the distance between the central pole and any satellite pole is 3-5 meters.

3. The ground grid according to claim 1, wherein each ground electrode is buried in a ground well with a depth greater than 3 meters.

4. The grounding grid according to claim 1, characterized in that, the backbone grid is set in the ditch under the building in the form of a bracket.

5. The ground grid according to claim 1, characterized in that an insulating layer is provided on the outer surface of the backbone grid.

6. The grounding network according to claim 1, wherein the backbone network is a galvanized flat steel or a copper cable.