CN204596999U - Grounding electrode insulation screen structure - Google Patents
Grounding electrode insulation screen structure Download PDFInfo
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- CN204596999U CN204596999U CN201520181640.7U CN201520181640U CN204596999U CN 204596999 U CN204596999 U CN 204596999U CN 201520181640 U CN201520181640 U CN 201520181640U CN 204596999 U CN204596999 U CN 204596999U
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Abstract
The utility model discloses grounding electrode insulation screen structure, comprise the shell body of grounding electrode and cement casting, cavity is provided with in shell body, electrode is provided with in cavity in shell body, grounding electrode is wrapped with one deck spongy layer, outer activated carbon layer and interior activated carbon layer are set outside spongy layer, quick lime layer is provided with between outer activated carbon layer and interior activated carbon layer, the bottom of quick lime layer is provided with water-filtering part, between water-filtering part and quick lime layer, filter course is set, water-filtering part is connected with aqueduct, aqueduct end is provided with overhead gage and lower baffle plate, Unidirectional water permeable film is provided with between overhead gage and lower baffle plate, the permeable direction of Unidirectional water permeable film is the direction from overhead gage to lower baffle plate, grounding electrode is connected with lower baffle plate by wire.Compared with prior art, the utility model, can under the prerequisite not increasing electrode size, floor space, under saving again the condition of construction cost to the full extent, and the maximized maximum stride voltage reducing grounding electrode and produce.
Description
Technical field
The utility model belongs to electrical equipment, particularly relates to grounding electrode insulation screen structure.
Background technology
When HVDC (High Voltage Direct Current) transmission system adopts monopolar ground circuit operation mode to run, powerful direct current flows into the earth, may produce harmful effect to the environment of periphery.Under the situation that China's high pressure, extra-high voltage direct-current transmission develop rapidly, the impact how optimizing earth electrode design and minimizing electrode pair surrounding enviroment needs further investigation.D. C. Electric transmission earthed pole is different from AC earth net, and it is often operated in active.When DC transmission system is run with one pole ground return circuit, when powerful direct current injects the earth by earth electrode constantly, will along with occurring that earth electrode temperature and ground potential raise, step voltage appears in ground.
When a live wire of overhead transmission line is disconnected fall to the ground time, pick-up point is identical with the electromotive force of live wire, electric current will be wandering to the earth from the pick-up point of wire, so on ground centered by wire pick-up point, define a Potential Distributing region, from pick-up point more away from, electric current is overstepping the bounds of propriety loose, and ground potential is also lower.If within people or livestock stand in distance 8 ~ 10 meters, electric wire pick-up point.Electric shock step voltage accident just may occur, and this electric shock is called step voltage and gets an electric shock.When people is subject to step voltage, although electric current is the lower part of the body along people, form path to pin and the earth from pin again through leg, crotch, not through the vitals of human body, as safer.But it is actual really not so! When being subject to higher step voltage effect because behaving, both feet can knot, and health is fallen on the ground.This electric current not only making to act on health increases, and makes electric current through the path changing of human body, may flow through human body vitals completely, as from the beginning in one's hands or pin.Empirical evidence, people falls down to the ground after-current continuous action 2 second in vivo, and this electric shock will be fatal.
Once be strayed into step voltage district, should step small step, both feet do not land simultaneously, and a best pin jumps, and the area contrary towards earth point is walked, and progressively leaves step voltage district.People stands on ground short circuit loop, and two foot distance is from being 0.8 meter, and the voltage that the person bears, is called step voltage.
The power industry development of current China, DC transmission system constantly increases, and the electrode of ground connection is just more and more.Find box-like address, be used for placing grounding electrode more and more difficult.Current more existing designs, its maximum stride voltage all exceeds standard, and this is breakneck, and particularly present address is all selected in farmland place.Current this mode, certainly will need to change.
Under technology system known at present, the method solving grounding electrode step voltage has three kinds: one to be lay resistive formation on earth's surface; Two is the size of grounding electrode increased; Three is bury more deepen by grounding electrode.
The position of current grounding electrode is selected in farmland place mostly, after burying electrode, also needs the soil on upper strata to give back that peasant continues to till the land.If employing method one, this will increase land expropriation cost, very uneconomical.And if increase the size of grounding electrode, single needs does not take larger soil, increases land expropriation cost, but also adds the fee of material of electrode.In addition, under the geological environment that some is special, available area is very limited, and method two is not general.And by grounding electrode buried depth, maximum stride voltage can be reduced to a certain extent, but effect is not clearly, obtain comparatively significantly effect, need the earth weight increasing excavation too huge, in addition, this method also means that needs dig darker hole and cause construction cost straight line to increase, and therefore this method is wise not.
Under existing technology, reduce maximum stride voltage, all need significantly increase construction cost or increase land expropriation cost, therefore, we are badly in need of the scheme of a kind of economy, green reduction step voltage.
Utility model content
The utility model is for deficiency of the prior art, provide grounding electrode insulation screen structure, adopt this structure can under the prerequisite not increasing electrode size, floor space, under saving again the condition of construction cost to the full extent, the maximized maximum stride voltage reducing grounding electrode and produce.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals: grounding electrode insulation screen structure, comprise the shell body of grounding electrode and cement casting, cavity is provided with in described shell body, described electrode is provided with in cavity in described shell body, described grounding electrode is wrapped with one deck spongy layer, described spongy layer is outside equipped with two-layer activated carbon layer and is respectively outer activated carbon layer and interior activated carbon layer, quick lime layer is provided with between described outer activated carbon layer and described interior activated carbon layer, the bottom of described quick lime layer is provided with water-filtering part, the filter course with tiny permeable hole is set between described water-filtering part and described quick lime layer, described water-filtering part is connected with aqueduct, described aqueduct end is provided with the overhead gage with permeable hole and lower baffle plate be made up of metal material, Unidirectional water permeable film is provided with between described overhead gage and described lower baffle plate, the permeable direction of described Unidirectional water permeable film is the direction from described overhead gage to described lower baffle plate, described grounding electrode is connected with described lower baffle plate by wire.
In technique scheme, preferably, the bottom of described shell body is provided with breach, the shell body near described breach is provided with leg-of-mutton outstanding tip.
In technique scheme, preferably, be provided with layer of metal layer between described outer activated carbon layer and the inwall of described shell body, described metal level is connected with Metallic rod, and described metal rod ends shrinks the formation contraction flow region that diminishes gradually.
In technique scheme, preferably, described aqueduct tail end shrinks gradually to diminish and forms sharp-pointed contraction termination.
In technique scheme, preferably, described contraction flow region and described contraction termination are stretched out outside described shell body from the described indentation, there of the bottom of described shell body.
In technique scheme, preferably, pressure-bearing platform is provided with above described shell body.
The Unidirectional water permeable film adopted in the utility model, its manufacture method comes from patent " a kind of have composite cellulosic membrane of Unidirectional water permeable performance and preparation method thereof " (Authorization Notice No.: CN 102691175 B).Grounding electrode access can be conducted electricity in ground, and reason is to also have moisture in soil exactly, and has a lot of impurity, and such soil just can conduct electricity.If the environment of drying, then soil would not conduct electricity.If the soil near grounding electrode can be become dry, just current direction thin solum can be stoped, then by the earth of the conduct current deep layer of grounding electrode, thus just can realize the object of the step voltage reducing earth's surface.By conduct current the earth in this programme, wire is only needed to realize, do not need too much structure, thus achieve do not increase grounding electrode size, do not roll up condition that floor space and construction funds comparatively save under, adopt both economical structure to reduce the function of maximum stride voltage.
The utility model structure is simply convenient to promote the use of on a large scale, adopt the technical program, can under the prerequisite not increasing electrode size, floor space, under saving again the condition of construction cost to the full extent, the maximized maximum stride voltage reducing grounding electrode and produce.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model overhead gage and lower baffle plate structural representation.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail: as shown in Figure 1 to Figure 2, grounding electrode insulation screen structure, comprise the shell body 1 of grounding electrode 2 and cement casting, cavity is provided with in described shell body 1, described electrode 2 is provided with in cavity in described shell body 1, described grounding electrode 2 is wrapped with one deck spongy layer 21, described spongy layer 21 is outside equipped with two-layer activated carbon layer and is respectively outer activated carbon layer 4 and interior activated carbon layer 41, quick lime layer 42 is provided with between described outer activated carbon layer 4 and described interior activated carbon layer 41, the bottom of described quick lime layer 42 is provided with water-filtering part 61, the filter course with tiny permeable hole is set between described water-filtering part 61 and described quick lime layer 42, described water-filtering part 61 is connected with aqueduct 6, described aqueduct 6 end is provided with the overhead gage 51 with permeable hole and lower baffle plate 52 be made up of metal material, Unidirectional water permeable film 7 is provided with between described overhead gage 51 and described lower baffle plate 52, the permeable direction of described Unidirectional water permeable film 7 is the direction from described overhead gage 51 to described lower baffle plate 52, described grounding electrode 2 is connected with described lower baffle plate 52 by wire 5.This device is provided with spongy layer 21, is to prevent quick lime and grounding electrode 2 from contacting.And be provided with outer activated carbon layer 4 at quick lime layer 42 side, being to prevent some magazines in soil from entering into quick lime layer 42, affecting its work.
The bottom of described shell body 1 is provided with breach, and the shell body 1 near described breach is provided with leg-of-mutton outstanding tip 11.
Be provided with layer of metal layer 3 between described outer activated carbon layer 4 and the inwall of described shell body 1, described metal level 3 is connected with Metallic rod 31, and described Metallic rod 31 end is shunk gradually to diminish and formed contraction flow region 32.
Described aqueduct 6 tail end shrinks gradually to diminish and forms sharp-pointed contraction termination 62.
Described contraction flow region 32 and described contraction termination 62 are stretched out outside described shell body 1 from the described indentation, there of the bottom of described shell body 1.
Pressure-bearing platform 12 is provided with above described shell body 1.
Metal level 3 in this device, is provided with several through holes above it, these through holes are symmetrical in the center of metal level 3.Arranging outstanding tip 11 is conveniently this device is installed to underground.And be provided with breach, not only can provide the space of stretching out shell body 1 for contraction flow region 32 and contraction termination 62, can also match with the through hole on metal level 3, convenient outer activated carbon layer 4 and quick lime layer 42 absorb water from soil.Then these water can import among water-filtering part 61, then flow into aqueduct 6, discharge from contraction termination 62 opening.Such setting, can make to be positioned at inner grounding electrode 2 and keep dry.And the wire 5 be connected with grounding electrode 2, be in moist state in aqueduct 6 inside, this can the electric conductivity of lifting lead wire 5.Therefore, enough lower baffle plate 52 places being transferred to below by the wire 5 that diameter is less of electric energy of grounding electrode 2, then be transferred to the earth of depths, below.Such setting, the actual position contacted with the earth of grounding electrode 2, be positioned at below darker the earth, this just can greatly reduce the step voltage on earth's surface.
Time this device uses, need to apply pressure on pressure-bearing platform 12, thus this device can be pressed into large underground.The effect of pressure-bearing platform is exactly convenient this device of installation.Be provided with outstanding tip 11 below this device, shrink termination 62 and contraction flow region 32, this device can be facilitated to insert underground.And then pressure is applied on pressure-bearing platform 12, just can very easily this device be installed under coordinating like this.In order to desirable position can be installed to, needs first to dig a hole, then this device is positioned on hole, this device is being pounded into underground.Such setting, just has part soil from the opening part shrinking termination 62, enters into and shrink among termination 62, and contact with lower baffle plate 52.Like this, grounding electrode 2 is just connected with soil herein, which achieves the mode of grounding electrode 2 buried depth, and the mode that this programme adopts, need not dig a large amount of earth, just can realize.Further, in this device, the position that grounding electrode 2 reality contacts with soil, top is also provided with this very thick insulation screen of shell body 1, therefore, adopt the technical program, the step voltage on its earth's surface is well below existing grounding electrode insulation screen structure in the market.
The voltage of grounding electrode 2 is higher, can produce comparatively high-intensity magnetic field when current flowing wherein.This magnetic field can have an impact to the soil outside shell body 1, is specially, and magnetic field can to charged particle generation effect among soil.If time electric current is interchange, these charging particle movements will be made.When this type of charging particle movement numerous time, from the angle of macroscopic view, define electric current exactly.This will define voltage outside shell body 1, so still makes the step voltage of the earth increase.Therefore, need to eliminate this impact.So, be provided with metal level 3 in this device, utilize the principle of electrostatic screen, this impact is dropped to minimum.
Electrostatic screen: in order to avoid external electrical field is on the impact of instrument and equipment, or in order to avoid the electric field impact to external world of electric equipment, with a cavity conductor, external electric field is covered, make its inside unaffected, also do not make electric equipment have an impact to external world, this is just called electrostatic screen.Cavity conductor is earth-free is shielding for external shield, cavity conductor ground connection be shielding for inner shield.Electrostatic screen has the meaning of two aspects, first practical significance: shielding makes the instrument in metallic conductor shell or operational environment not be subject to external electric fields, does not also have an impact to external electrical field.Metal level 3 in this device is exactly cavity conductor, and metal level 3 is also connected to Metallic rod 31, and Metallic rod 31 is stretched out outside shell body 1, directly contacts, so this device can be considered as inner shield with the earth.The charged particle that such metal level 3 produces because of the high-tension impact of grounding electrode 2, the tip of Metallic rod 31 will be gathered in, also be on contraction flow region 32, and outside contraction flow region 32 shell body 1, very far away with ground level, therefore its impact formed the step voltage on earth's surface is very little, and electricity is ignored substantially.
The Unidirectional water permeable film adopted in the utility model, its manufacture method comes from patent " a kind of have composite cellulosic membrane of Unidirectional water permeable performance and preparation method thereof " (Authorization Notice No.: CN 102691175 B).Adopt Unidirectional water permeable film in the technical program, the water in aqueduct 6 is discharged this device and is arrived by its effect exactly, and it is inner to forbid that extraneous moisture enters this device by aqueduct 6.
Grounding electrode access can be conducted electricity in ground, and reason is to also have moisture in soil exactly, and has a lot of impurity, and such soil just can conduct electricity.If the environment of drying, then soil would not conduct electricity.If the soil near grounding electrode can be become dry, just current direction thin solum can be stoped, then by the earth of the conduct current deep layer of grounding electrode, thus just can realize the object of the step voltage reducing earth's surface.By conduct current the earth in this programme, wire is only needed to realize, do not need too much structure, thus achieve do not increase grounding electrode size, do not roll up condition that floor space and construction funds comparatively save under, adopt both economical structure to reduce the function of maximum stride voltage.
Protection range of the present utility model includes but not limited to above execution mode; protection range of the present utility model is as the criterion with claims, and any replacement that those skilled in the art will find apparent that, distortion, improvement made this technology all falls into protection range of the present utility model.
The utility model structure is simply convenient to promote the use of on a large scale, adopt the technical program, can under the prerequisite not increasing electrode size, floor space, under saving again the condition of construction cost to the full extent, the maximized maximum stride voltage reducing grounding electrode and produce.
Claims (6)
1. grounding electrode insulation screen structure, comprise the shell body (1) of grounding electrode (2) and cement casting, described shell body is provided with cavity in (1), described electrode (2) is provided with in cavity in described shell body (1), it is characterized in that: described grounding electrode (2) is wrapped with one deck spongy layer (21), described spongy layer (21) is outside equipped with two-layer activated carbon layer and is respectively outer activated carbon layer (4) and interior activated carbon layer (41), quick lime layer (42) is provided with between described outer activated carbon layer (4) and described interior activated carbon layer (41), the bottom of described quick lime layer (42) is provided with water-filtering part (61), the filter course with tiny permeable hole is set between described water-filtering part (61) and described quick lime layer (42), described water-filtering part (61) is connected with aqueduct (6), described aqueduct (6) end is provided with the overhead gage (51) with permeable hole and lower baffle plate (52) be made up of metal material, Unidirectional water permeable film (7) is provided with between described overhead gage (51) and described lower baffle plate (52), the permeable direction of described Unidirectional water permeable film (7) is the direction from described overhead gage (51) to described lower baffle plate (52), described grounding electrode (2) is connected with described lower baffle plate (52) by wire (5).
2. grounding electrode insulation screen structure according to claim 1, is characterized in that: the bottom of described shell body (1) is provided with breach, and the shell body (1) near described breach is provided with leg-of-mutton outstanding tip (11).
3. grounding electrode insulation screen structure according to claim 2, it is characterized in that: between the inwall of described outer activated carbon layer (4) and described shell body (1), be provided with layer of metal layer (3), described metal level (3) is connected with Metallic rod (31), and described Metallic rod (31) end is shunk gradually to diminish and formed contraction flow region (32).
4. grounding electrode insulation screen structure according to claim 3, is characterized in that: described aqueduct (6) tail end shrinks gradually to diminish and forms sharp-pointed contraction termination (62).
5. grounding electrode insulation screen structure according to claim 4, is characterized in that: described contraction flow region (32) and described contraction termination (62) are stretched out outside described shell body (1) from the described indentation, there of the bottom of described shell body (1).
6. grounding electrode insulation screen structure according to claim 5, is characterized in that: described shell body (1) top is provided with pressure-bearing platform (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520181640.7U CN204596999U (en) | 2015-03-30 | 2015-03-30 | Grounding electrode insulation screen structure |
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| CN201520181640.7U CN204596999U (en) | 2015-03-30 | 2015-03-30 | Grounding electrode insulation screen structure |
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| CN204596999U true CN204596999U (en) | 2015-08-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716445A (en) * | 2015-03-30 | 2015-06-17 | 余姚市电力设备修造厂 | Grounding electrode insulation shielding structure |
| CN111163625A (en) * | 2020-01-08 | 2020-05-15 | 李志宏 | Semi-anechoic chamber and floor structure thereof |
-
2015
- 2015-03-30 CN CN201520181640.7U patent/CN204596999U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716445A (en) * | 2015-03-30 | 2015-06-17 | 余姚市电力设备修造厂 | Grounding electrode insulation shielding structure |
| CN104716445B (en) * | 2015-03-30 | 2016-12-07 | 余姚市电力设备修造厂 | Grounding electrode insulation screen structure |
| CN111163625A (en) * | 2020-01-08 | 2020-05-15 | 李志宏 | Semi-anechoic chamber and floor structure thereof |
| CN111163625B (en) * | 2020-01-08 | 2022-05-13 | 李志宏 | Semi-anechoic chamber and floor structure thereof |
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