CN104184015A - Installation construction process for grounding device - Google Patents
Installation construction process for grounding device Download PDFInfo
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- CN104184015A CN104184015A CN201410321968.4A CN201410321968A CN104184015A CN 104184015 A CN104184015 A CN 104184015A CN 201410321968 A CN201410321968 A CN 201410321968A CN 104184015 A CN104184015 A CN 104184015A
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- grounding
- earthing device
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Abstract
The invention discloses an installation construction process for a grounding device. Intervals of vertical grounding bodies should not be less than twice of the lengths; intervals of horizontal grounding bodies are 5-10 meters. Intervals of the grounding bodies and a building are 1.5-4 meters. Top-face burial depths of the grounding bodies are not smaller than 0.6 meters. Top ends of vertical grounding electrodes are distanced from the ground for 0.6-2 meters. Lap-joint lengths of zinc-coated flat steels should be not smaller than twice of widths of the flat steels and welding should be carried out on 3-5 edges. During lap joint of round steels and the flat steels, the lap-joint lengths should be not smaller than 6 times of diameters of the round steels. Before welding, dirt on surfaces of welding places of to-be-welded objects should be cleared until the surfaces emit metallic luster. An independent lightning arrester should be provided with an independent centralized grounding device. The lightning arrester grounding device can be connected with a grounding network. The grounding protection process is significantly complete, and capable of effectively preventing damages on household electrical appliances so that manpower resources are saved and restoration time is saved.
Description
Technical field
The present invention relates to a kind of device mounting process, particularly a kind of earthing device construction technique, belongs to ground connection mounting technique field.
Background technology
Earthing device also claims ground connection integrated apparatus: forming the equipment of electrical connection between electric equipment or other objects and ground, earthing device forms earthing device by earth electrode, earth bus, down conductor, framework ground connection, and it is used to realize the object that electrical system is connected with the earth.The metal object that directly contacts realization electrical connection with the earth is earth electrode; it can be artificial earthing's utmost point; also can be the natural grounding utmost point; to this earth electrode, can compose with certain electric function; for example, in order to make system earth, protective earthing or signal ground; ground connection busbar is the reference point of potential of electrical installations in buildings, by it, the part of electric device domestic demand ground connection is connected with earth electrode.It also plays another effect, by it, all bonding conductors in electric device is interconnected, thereby realizes the total equipotential bonding between large part current-carrying part in a building.Connecting line between earth electrode and ground connection busbar is called earth electrode lead-in wire.
Earth resistance refers to the resistance that electric current runs into when entering the earth and spreading towards periphery through earth electrode.The earth has certain resistivity, if while having electric current to flow through, just has different current potentials everywhere largely.Electric current is after earth electrode injects the earth, it with the form of current field to diffusion everywhere, from earth point more away from, hemispheric diffusing area is larger, current density in ground is just little, therefore can think at a distance, the resistance of unit diffusion length and earth current density have approached zero, this place's current potential has been zero potential, the current potential Um at earth point place and the ratio of earth current I are defined as the earth resistance R of this point, R=Um/I, when earth current is definite value, earth resistance is less, current potential Um is lower, otherwise higher, earth resistance depends primarily on the structure of earthing device, size, buried degree of depth and local soil resistivity, because the resistivity of metal earth electrode is much smaller than soil resistivity, therefore the resistance of earth electrode itself is negligible in earth resistance.
Summary of the invention
Goal of the invention: to have the unconspicuous problem of earthing effect in order overcoming in prior art, to the invention provides a kind of earthing device construction technique.
Technical scheme: for achieving the above object, the invention provides a kind of earthing device construction technique, comprise the following steps:
A, earth electrode are arranged: the spacing of described Grounding Grids should not be less than the twice of length, 5～10 meters of the spacing of described horizontal grounding objects, and 1.5～4 meters of the spacing of described earth electrode and described building, the end face depth of burying of described earth electrode is not less than 0.6 meter;
B, vertical grounding electrode construction: 0.6～2 meter far from ground, the top of described vertical grounding electrode, vertical grounding electrode lower end can install the rough turn tip pipe close forming of round steel additional, pipe cap should be enclosed within pipe end to protect the mouth of pipe and execute hammer before earth electrode is squeezed into earth, can extract pipe cap and use separately after earth electrode is squeezed into earth;
The connection of C, grounding flat steel: the described zinc-coated flat steel sheet lap of splice should be not less than 2 times of band steel width, has 3～5 seamed edge welding, is not less than 6 times of round steel diameter when described round steel and band steel overlap joint;
D, welding: before described welding, the dirt on the weld surface of welding thing should be eliminated, until metallic luster is exposed on surface, connecing must be firmly without rosin joint, all weld seams are answered smooth free of discontinuities, molten metal is through welding firmly, and welding finishes welding slag to be removed, and is coated with pitch prill paint;
E, the construction of independent lightning rod centralized earthing device: described independent lightning rod should arrange independently centralized earthing device, described independent lightning rod earthing device can be connected with described ground network, 15～22 meters of the length of the underground tie point of described lightning rod and described main grounding grid to the underground tie point of 35kV and following equipment and main grounding grid along earth electrode, the complete earth resistance of described construction should not be greater than 10 ohm;
The lightning protection of F, chimney: described lightning-arrest downlead should reliably be connected with centralized earthing device, and the down conductor system of chimney should be embedded in building by Civil Specialities, and leave ground connection termination;
G, backfill soil: described backfill soil thickness 300～450mm.
Ground protection technique of the present invention is very perfect, effectively prevents the damage of thunder and lightning to household electrical appliances, has saved human resources, has saved repair time.
The lightning protection of described chimney is electrically connected itself and centralized earthing device while constructing reliably, can more effectively protect electric equipment like this.
3～7 meters of the ground middle distances of described independent lightning rod earthing device and ground network are that distance reduces the frequency that thunder and lightning damages ground network by lightning rod and ground network.
Beneficial effect: prior art of the present invention is compared tool and had the following advantages:
1, ground protection technique of the present invention is very perfect, effectively prevents the damage of thunder and lightning to household electrical appliances, has saved human resources, has saved repair time;
When 2, lightning protection is constructed, itself and centralized earthing device are electrically connected reliably, can more effectively protect electric equipment like this;
3, by lightning rod and ground network, be that distance reduces the frequency that thunder and lightning damages ground network.
Embodiment
By specific embodiment, the present invention is done into-step and set forth, be noted that for those skilled in the art, under the premise without departing from the principles of the invention, the modification of the various equivalent form of values of the present invention is all fallen within to the application's claims limited range.
Embodiment 1:
An earthing device construction technique, comprises the following steps:
A, earth electrode are arranged: the spacing of described Grounding Grids should not be less than the twice of length, 6 meters of the spacing of described horizontal grounding objects, and 1.5 meters of the spacing of described earth electrode and described building, the end face depth of burying of described earth electrode is not less than 0.6 meter;
B, vertical grounding electrode construction: 0.6 meter far from ground, the top of described vertical grounding electrode, vertical grounding electrode lower end can install the rough turn tip pipe close forming of round steel additional, pipe cap should be enclosed within pipe end to protect the mouth of pipe and execute hammer before earth electrode is squeezed into earth, can extract pipe cap and use separately after earth electrode is squeezed into earth;
The connection of C, grounding flat steel: the described zinc-coated flat steel sheet lap of splice should be not less than 2 times of band steel width, has 3 seamed edge welding, is not less than 6 times of round steel diameter when described round steel and band steel overlap joint;
D, welding: before described welding, the dirt on the weld surface of welding thing should be eliminated, until metallic luster is exposed on surface, connecing must be firmly without rosin joint, all weld seams are answered smooth free of discontinuities, molten metal is through welding firmly, and welding finishes welding slag to be removed, and is coated with pitch prill paint;
E, the construction of independent lightning rod centralized earthing device: described independent lightning rod should arrange independently centralized earthing device, described independent lightning rod earthing device can be connected with described ground network, 15 meters of the length of the underground tie point of described lightning rod and described main grounding grid to the underground tie point of 35kV and following equipment and main grounding grid along earth electrode, the complete earth resistance of described construction should not be greater than 10 ohm, 3 meters of the ground middle distances of described independent lightning rod earthing device and ground network are that distance reduces the frequency that thunder and lightning damages ground network by lightning rod and ground network;
The lightning protection of F, chimney: described lightning-arrest downlead should reliably be connected with centralized earthing device, the down conductor system of chimney should be embedded in building by Civil Specialities, and leave ground connection termination, the lightning protection of described chimney is electrically connected itself and centralized earthing device while constructing reliably, can more effectively protect electric equipment like this;
G, backfill soil: described backfill soil thickness 30mm.
Ground protection technique of the present invention is very perfect, effectively prevents the damage of thunder and lightning to household electrical appliances, has saved human resources, has saved repair time.
Embodiment 2:
An earthing device construction technique, comprises the following steps:
A, earth electrode are arranged: the spacing of described Grounding Grids should not be less than the twice of length, 7 meters of the spacing of described horizontal grounding objects, and 3 meters of the spacing of described earth electrode and described building, the end face depth of burying of described earth electrode is not less than 0.6 meter;
B, vertical grounding electrode construction: 1.5 meters far from ground, the top of described vertical grounding electrode, vertical grounding electrode lower end can install the rough turn tip pipe close forming of round steel additional, pipe cap should be enclosed within pipe end to protect the mouth of pipe and execute hammer before earth electrode is squeezed into earth, can extract pipe cap and use separately after earth electrode is squeezed into earth;
The connection of C, grounding flat steel: the described zinc-coated flat steel sheet lap of splice should be not less than 2 times of band steel width, has 4 seamed edge welding, is not less than 6 times of round steel diameter when described round steel and band steel overlap joint;
D, welding: before described welding, the dirt on the weld surface of welding thing should be eliminated, until metallic luster is exposed on surface, connecing must be firmly without rosin joint, all weld seams are answered smooth free of discontinuities, molten metal is through welding firmly, and welding finishes welding slag to be removed, and is coated with pitch prill paint;
E, the construction of independent lightning rod centralized earthing device: described independent lightning rod should arrange independently centralized earthing device, described independent lightning rod earthing device can be connected with described ground network, 19 meters of the length of the underground tie point of described lightning rod and described main grounding grid to the underground tie point of 35kV and following equipment and main grounding grid along earth electrode, the complete earth resistance of described construction should not be greater than 10 ohm, 5 meters of the ground middle distances of described independent lightning rod earthing device and ground network are that distance reduces the frequency that thunder and lightning damages ground network by lightning rod and ground network;
The lightning protection of F, chimney: described lightning-arrest downlead should reliably be connected with centralized earthing device, the down conductor system of chimney should be embedded in building by Civil Specialities, and leave ground connection termination, the lightning protection of described chimney is electrically connected itself and centralized earthing device while constructing reliably, can more effectively protect electric equipment like this;
G, backfill soil: described backfill soil thickness 370mm.
Ground protection technique of the present invention is very perfect, effectively prevents the damage of thunder and lightning to household electrical appliances, has saved human resources, has saved repair time.
Embodiment 3:
An earthing device construction technique, comprises the following steps:
A, earth electrode are arranged: the spacing of described Grounding Grids should not be less than the twice of length, 10 meters of the spacing of described horizontal grounding objects, and spacing～4 meter of described earth electrode and described building, the end face depth of burying of described earth electrode is not less than 0.6 meter;
B, vertical grounding electrode construction: 2 meters far from ground, the top of described vertical grounding electrode, vertical grounding electrode lower end can install the rough turn tip pipe close forming of round steel additional, pipe cap should be enclosed within pipe end to protect the mouth of pipe and execute hammer before earth electrode is squeezed into earth, can extract pipe cap and use separately after earth electrode is squeezed into earth;
The connection of C, grounding flat steel: the described zinc-coated flat steel sheet lap of splice should be not less than 2 times of band steel width, has 5 seamed edge welding, is not less than 6 times of round steel diameter when described round steel and band steel overlap joint;
D, welding: before described welding, the dirt on the weld surface of welding thing should be eliminated, until metallic luster is exposed on surface, connecing must be firmly without rosin joint, all weld seams are answered smooth free of discontinuities, molten metal is through welding firmly, and welding finishes welding slag to be removed, and is coated with pitch prill paint;
E, the construction of independent lightning rod centralized earthing device: described independent lightning rod should arrange independently centralized earthing device, described independent lightning rod earthing device can be connected with described ground network, 22 meters of the length of the underground tie point of described lightning rod and described main grounding grid to the underground tie point of 35kV and following equipment and main grounding grid along earth electrode, the complete earth resistance of described construction should not be greater than 10 ohm, 7 meters of the ground middle distances of described independent lightning rod earthing device and ground network are that distance reduces the frequency that thunder and lightning damages ground network by lightning rod and ground network;
The lightning protection of F, chimney: described lightning-arrest downlead should reliably be connected with centralized earthing device, the down conductor system of chimney should be embedded in building by Civil Specialities, and leave ground connection termination, the lightning protection of described chimney is electrically connected itself and centralized earthing device while constructing reliably, can more effectively protect electric equipment like this;
G, backfill soil: described backfill soil thickness 450mm.
Ground protection technique of the present invention is very perfect, effectively prevents the damage of thunder and lightning to household electrical appliances, has saved human resources, has saved repair time
?.
Claims (3)
1. an earthing device construction technique, is characterized in that: comprise the following steps:
A, earth electrode are arranged: the spacing of described Grounding Grids should not be less than the twice of length, 5～10 meters of the spacing of described horizontal grounding objects, and 1.5～4 meters of the spacing of described earth electrode and described building, the end face depth of burying of described earth electrode is not less than 0.6 meter;
B, vertical grounding electrode construction: 0.6～2 meter far from ground, the top of described vertical grounding electrode;
The connection of C, grounding flat steel: the described zinc-coated flat steel sheet lap of splice should be not less than 2 times of band steel width, has 3～5 seamed edge welding, is not less than 6 times of round steel diameter when described round steel and band steel overlap joint;
D, welding: before described welding, the dirt on the weld surface of welding thing should be eliminated, until metallic luster is exposed on surface;
E, the construction of independent lightning rod centralized earthing device: described independent lightning rod should arrange independently centralized earthing device, described independent lightning rod earthing device can be connected with described ground network, 15～22 meters of the length of the underground tie point of described lightning rod and described main grounding grid to the underground tie point of 35kV and following equipment and main grounding grid along earth electrode, the complete earth resistance of described construction should not be greater than 10 ohm;
The lightning protection of F, chimney: described lightning-arrest downlead should reliably be connected with centralized earthing device;
G, backfill soil: described backfill soil thickness 300～450mm.
2. according to a kind of earthing device construction technique described in claims 1, it is characterized in that: the lightning protection of described chimney is electrically connected itself and centralized earthing device while constructing reliably.
3. according to a kind of earthing device construction technique described in claims 1, it is characterized in that: 3～7 meters of the ground middle distances of described independent lightning rod earthing device and ground network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410321968.4A CN104184015A (en) | 2014-07-08 | 2014-07-08 | Installation construction process for grounding device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410321968.4A CN104184015A (en) | 2014-07-08 | 2014-07-08 | Installation construction process for grounding device |
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| CN104184015A true CN104184015A (en) | 2014-12-03 |
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| CN201410321968.4A Pending CN104184015A (en) | 2014-07-08 | 2014-07-08 | Installation construction process for grounding device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577364A (en) * | 2015-01-21 | 2015-04-29 | 中铁二十一局集团第二工程有限公司 | Small-resistance-value grounding grid of large device and design construction method |
| CN104878848A (en) * | 2015-05-27 | 2015-09-02 | 南京长江都市建筑设计股份有限公司 | Lightning protection device for prefabricated frame columns and construction method of lightning protection device |
| CN112563770A (en) * | 2020-12-03 | 2021-03-26 | 国网陕西省电力公司电力科学研究院 | Grounding device for independent lightning rod of transformer substation and optimization method |
-
2014
- 2014-07-08 CN CN201410321968.4A patent/CN104184015A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577364A (en) * | 2015-01-21 | 2015-04-29 | 中铁二十一局集团第二工程有限公司 | Small-resistance-value grounding grid of large device and design construction method |
| CN104878848A (en) * | 2015-05-27 | 2015-09-02 | 南京长江都市建筑设计股份有限公司 | Lightning protection device for prefabricated frame columns and construction method of lightning protection device |
| CN112563770A (en) * | 2020-12-03 | 2021-03-26 | 国网陕西省电力公司电力科学研究院 | Grounding device for independent lightning rod of transformer substation and optimization method |
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Application publication date: 20141203 |