CN204257835U - Resistance module falls in a kind of special-shaped graphite ground connection - Google Patents

Resistance module falls in a kind of special-shaped graphite ground connection Download PDF

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Publication number
CN204257835U
CN204257835U CN201420825958.XU CN201420825958U CN204257835U CN 204257835 U CN204257835 U CN 204257835U CN 201420825958 U CN201420825958 U CN 201420825958U CN 204257835 U CN204257835 U CN 204257835U
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China
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graphite
graphite body
ground connection
special
resistance module
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CN201420825958.XU
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斯江峰
黄剑
俞晓松
蒋表
赵春林
寿浙淼
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STATE GRID ZHEJIANG ZHUJI POWER SUPPLY Co Ltd
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Shaoxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
STATE GRID ZHEJIANG ZHUJI POWER SUPPLY Co Ltd
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Shaoxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Abstract

The utility model discloses a kind of special-shaped graphite ground connection and falls resistance module, comprise graphite body, and the electrode be connected in graphite body, described graphite body is cylindrical, lateral surface is formed by connecting by the arc surface of 8-12 the swaged that concaves, and graphite body is axially arranged with multiple through hole, the setting of arc surface and through hole, ground connection can be increased on the one hand and fall resistance module and the contact area on ground, graphite body weight and cost can be alleviated on the other hand; Described arc surface is coated with high water suction protecting film, the bottom of described graphite body is provided with a stainless steel nose cone, the top of graphite body is inserted in electrode one end, and it is outer for connecting earth connection that graphite body is exposed in one end, and the top of described graphite body is provided with a corrosion resistant plate further.Resistance module falls in special-shaped graphite ground connection described in the utility model can more effective reduction earth resistance, and has higher corrosion resistance, widely applicable.

Description

Resistance module falls in a kind of special-shaped graphite ground connection
Technical field
The utility model relates to a kind of special-shaped graphite ground connection and falls resistance module, belongs to earthing device technical field.
Background technology
Ultra-high-tension power transmission line safe, stable, operate in whole electrical network and play a crucial role reliably, and transmission line occurs to trip and is mainly caused by operating voltage, switching overvoltage or atmospheric over-voltage in running.At present, in extra-high voltage transmission, switching overvoltage is controlled in reduced levels; Meanwhile, the raising of line insulation level, the reliability of transmission line under operating voltage effect also significantly improves.So thunderbolt becomes the main cause of line fault.And the earth resistance reducing electric power line pole tower improves one of the lightning protection level of circuit, the important measures reducing tripping rate with lightning strike.Grounding design is the key link of electrical design, is one of visual plant lightning current being leaked into fast the earth, needs to lay artificial earthing's device carry out falling resistance when natural grounding substance cannot make full use of.The principal element affecting earthing effect has the selection and operation technological process control etc. of the resistivity of ground connection soil, artificial earth electrode.
The good electrical connection of a part for electric equipment and the intercropping of the earth is called ground connection, and the device of electric power system or equipment should by specifying ground connection.The metal object directly contacted with the earth is called earth electrode or earth electrode, and the wire connecting earth electrode and equipment ground part is called earth connection, and earth electrode and earth connection form earthing device.In order to reach the object of ground connection, metalwork such as round steel, band steel, copper, the alloy etc. imbedded artificially in ground are called artificial earth electrode; What double as earth electrode is directly called natural grounding substance with the basis of the various hardwares greatly contacted, metal well casing, reinforced concrete building structures, metallic conduit and equipment etc.Earthing device can use natural grounding substance or artificial earth electrode.
The main function of the tower grounding device of power transmission sequence is exactly that catharsis thunder and lightning flows into ground, certain lightning withstand level is had to keep circuit, because the probability that the current strength of thunder and lightning has the little lightning current appearance of current amplitude is large, and the feature that the probability that the thunder and lightning of amplitude occurs is smaller, so the earth resistance reducing electric power line pole tower plays an important role to raising line lightning resisting level, reduction tripping rate with lightning strike.
Existing tower grounding device paving mode mainly contains level laying, vertical laying, cathodic protection etc.The Basic practice of the earth work that China is current is: horizontal grounding objects answers ditching to bury underground, and steel Grounding Grids can directly be squeezed in trench, and its spacing should not be less than 2 times of its length and be evenly arranged, and copper and graphite material earth electrode should be digged pit and be buried underground.Application practice proves, these regulations and require not only constructability but also can obtain good earial drainage effect.When earthing device is made up of many levels or Grounding Grids, in order to reduce the shielding action of adjacent terrain, the pedometer of earth electrode is decided to be 5m, and now, corresponding usage factor is higher, is about 0.75-0.85.When the laying place of earthing device is restricted, above-mentioned distance suitably can reduce according to actual conditions, but generally should not be less than the length of earth electrode.
In recent years, there are some insoluble problems the engineer applied medium-high voltage transmission lines line pole tower ground connection of reality: one is the requirement that the earth resistance of earthing device does not reach regulation; Two is the areas falling resistance stability problem, particularly high soil resistivity, although can be good at falling resistance when installing, uses resistance reducing effect after a period of time to reduce far away, is not suitable for using; Three is corrosion problems of earth electrode; Four is that earth electrode easily suffers outside destroy, such as, at the tower grounding of desert area, when blowing hard, is easy to blown away by sandy soil and make earth electrode outside exposed, and the steel tower in ploughing, due to the farming in farmland, sometimes also can earth electrode be injured.
In view of this, the present inventor studies this, and develop a kind of special-shaped graphite ground connection specially and fall resistance module, this case produces thus.
Utility model content
The purpose of this utility model is to provide one can more effective reduction earth resistance, and has higher corrosion resistance, and resistance module falls in widely applicable special-shaped graphite ground connection.
To achieve these goals, solution of the present utility model is:
Resistance module falls in a kind of special-shaped graphite ground connection, comprise graphite body, and the electrode be connected in graphite body, described graphite body is cylindrical, lateral surface is formed by connecting by the arc surface of 8-12 the swaged that concaves, and graphite body is axially arranged with multiple through hole, the setting of arc surface and through hole, ground connection can be increased on the one hand and fall resistance module and the contact area on ground, graphite body weight and cost can be alleviated on the other hand; Described arc surface is coated with high water suction protecting film, the bottom of described graphite body is provided with a stainless steel nose cone, the top of graphite body is inserted in electrode one end, and it is outer for connecting earth connection that graphite body is exposed in one end, and the top of described graphite body is provided with a corrosion resistant plate further.
As preferably, described height water suction protecting film is cellulose gum protecting film or polyvinyl alcohol glue protecting film, has stronger water absorption, conducts electricity after absorbing hydrone.
As preferably, described stainless steel nose cone is spirally connected or is glued to the bottom surface of graphite body.
As preferably, described corrosion resistant plate is spirally connected or is glued to the upper end face of graphite body, and corrosion resistant plate is provided with the through hole corresponding with graphite body.The setting of corrosion resistant plate, can not damage graphite body when knocking ground connection and falling resistance module.
As preferably, described corrosion resistant plate is set in the upper end face of graphite body, and special-shaped graphite ground connection is fallen after resistance module buries underground, and corrosion resistant plate can be taken away, and end face in graphite body is directly contacted with earth, increase contact area.
As preferably, described stainless steel nose cone is hollow structure, and wall thickness is 0.5-4cm, can bear resistance power, can alleviate again weight and cost that resistance module falls in whole ground connection.
As preferably, described electrode is arranged on the non-central region of graphite body, such setting, is convenient to the center acting directly on graphite body when knocking, and can not damages electrode.
As preferably, described graphite body is the compound graphite of crystalline flake graphite, cement and sandstone high temperature forging and stamping.
Above-mentioned special-shaped graphite ground connection falls resistance module when using, and gravity acts directly on the corrosion resistant plate at graphite body top, more whole ground connection is fallen resistance module by stainless steel nose cone and bury underground below earth's surface.Compared with traditional earthing device, graphite mould earthing module described in the utility model mainly has following several advantage:
1, due to the corrosion of graphite acid and alkali, alkali, salt and soil pollutant, long service life, and the resistance of conventional earthing device can As time goes on and corrosion quickening, earth resistance increase very soon and even lost efficacy, and graphite As time goes on, the surrounding of earth electrode can be diffused into, be equivalent to increase the contact area with the earth, earth resistance can constantly reduce;
2, there is good ion sporadic, after imbedding underground, ion can be made to be dissipated in the soil of underground, form stable sheath, soil property is improved on a large scale, thus reducing the spreading resistance of soil, earthing module forms irreversible carbonization passage after lightning discharge in soil simultaneously, effectively can reduce soil resistivity;
3, significantly can reduce excavation area, particularly in city, the area of industrial park and earth electrode length limited, significantly reducing of excavation area also helps protection of the environment, reduce vegetation deterioration, avoid strengthening soil erosion, decrease the quantities of excavation area, investment reduction;
4, form stable, the impact of not climate, can not change because of the passage of time, chemical property and stable physical property, can not be corroded substantially, because earth electrode is short, therefore also greatly reduces by the chance of outside destroy.
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is that resistance modular structure schematic diagram falls in the special-shaped graphite ground connection of the present embodiment;
Fig. 2 is the graphite body vertical view of the present embodiment.
Embodiment
As shown in Figure 1-2, resistance module falls in a kind of special-shaped graphite ground connection, comprise graphite body 1, and the electrode 2 be connected in graphite body 1, described graphite body 1 is cylindrical, and lateral surface is formed by connecting by the arc surface 11 of 8-12 the swaged that concaves, graphite body is axially arranged with multiple through hole 12, the setting of arc surface 11 and through hole 12, can increase ground connection on the one hand and fall resistance module and the contact area on ground, can alleviate graphite body 1 weight and cost on the other hand; Described arc surface 11 is coated with high water suction protecting film 3, in the present embodiment, described height water suction protecting film is cellulose gum protecting film, also can select polyvinyl alcohol glue protecting film, and high water suction protecting film 3 has stronger water absorption, conducts electricity after absorbing hydrone.The top of graphite body 1 is inserted in described electrode 2 one end, and it is outer for connecting earth connection that graphite body 1 is exposed in one end.
The bottom of described graphite body 1 is bolted with a stainless steel nose cone 4, and stainless steel nose cone 4 also can adopt other modes to be fixed on the bottom surface of graphite body 1, and as bonding with glue, or draw-in groove is fixed.The setting of stainless steel nose cone 4, can fall resistance module more easily and insert ground by special-shaped graphite ground connection.Described stainless steel nose cone 4 is hollow structure, and wall thickness is 0.5-4 cm, can bear resistance power, can alleviate again weight and cost that resistance module falls in whole ground connection.
The top of described graphite body is provided with a corrosion resistant plate 5 further.Corrosion resistant plate 5 can be fixedly mounted on end face in graphite body 1, and also can install by on-fixed, when fixedly mounting in graphite body 1, corrosion resistant plate 5 is provided with the through hole corresponding with graphite body 1.When on-fixed is installed in graphite body 1, fall after resistance module buries precalculated position underground until ground connection, corrosion resistant plate 5 can directly be taken away, and end face in graphite body 1 is directly contacted with earth, increase contact area.The setting of corrosion resistant plate 5, mainly for the protection of graphite body 1, can not damage graphite body 1 when knocking ground connection and falling resistance module.
Described electrode 2 is arranged on the non-central region of graphite body 1, such setting, is convenient to the center acting directly on graphite body when knocking, and can not damages electrode.
In the present embodiment, described graphite body 1 is the compound graphite of crystalline flake graphite, cement and sandstone high temperature forging and stamping.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present utility model.

Claims (8)

1. resistance module falls in a special-shaped graphite ground connection, it is characterized in that: comprise graphite body, and be connected to the electrode in graphite body, described graphite body is cylindrical, lateral surface is formed by connecting by the arc surface of 8-12 the swaged that concaves, and graphite body is axially arranged with multiple through hole; Described arc surface is coated with high water suction protecting film, the bottom of described graphite body is provided with a stainless steel nose cone, the top of graphite body is inserted in electrode one end, and it is outer for connecting earth connection that graphite body is exposed in one end, and the top of described graphite body is provided with a corrosion resistant plate further.
2. resistance module falls in a kind of special-shaped graphite ground connection as claimed in claim 1, it is characterized in that: described height water suction protecting film is cellulose gum protecting film or polyvinyl alcohol glue protecting film.
3. resistance module falls in a kind of special-shaped graphite ground connection as claimed in claim 1, it is characterized in that: described stainless steel nose cone is spirally connected or is glued to the bottom surface of graphite body.
4. resistance module falls in a kind of special-shaped graphite ground connection as claimed in claim 1, it is characterized in that: described corrosion resistant plate is spirally connected or is glued to the upper end face of graphite body, and corrosion resistant plate is provided with the through hole corresponding with graphite body.
5. resistance module falls in a kind of special-shaped graphite ground connection as claimed in claim 1, it is characterized in that: described corrosion resistant plate is set in the upper end face of graphite body.
6. resistance module falls in a kind of special-shaped graphite ground connection as claimed in claim 1, and it is characterized in that: described stainless steel nose cone is hollow structure, wall thickness is 0.5-4cm.
7. resistance module falls in a kind of special-shaped graphite ground connection as claimed in claim 1, it is characterized in that: described electrode is arranged on the non-central region of graphite body.
8. resistance module falls in a kind of special-shaped graphite ground connection as claimed in claim 1, it is characterized in that: described graphite body is the compound graphite of crystalline flake graphite, cement and sandstone high temperature forging and stamping.
CN201420825958.XU 2014-12-23 2014-12-23 Resistance module falls in a kind of special-shaped graphite ground connection Active CN204257835U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104538750A (en) * 2014-12-23 2015-04-22 国网浙江诸暨市供电公司 Graphite type grounded resistance reducing module
RU2725139C1 (en) * 2019-07-26 2020-06-30 Общество С Ограниченной Ответственностью "Газпром Трансгаз Краснодар" Portable surface electrolytic earthing electrode

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104538750A (en) * 2014-12-23 2015-04-22 国网浙江诸暨市供电公司 Graphite type grounded resistance reducing module
RU2725139C1 (en) * 2019-07-26 2020-06-30 Общество С Ограниченной Ответственностью "Газпром Трансгаз Краснодар" Portable surface electrolytic earthing electrode

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