CN213520351U - Composite ground rod - Google Patents
Composite ground rod Download PDFInfo
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- CN213520351U CN213520351U CN202021421117.4U CN202021421117U CN213520351U CN 213520351 U CN213520351 U CN 213520351U CN 202021421117 U CN202021421117 U CN 202021421117U CN 213520351 U CN213520351 U CN 213520351U
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Abstract
The utility model discloses a compound earth bar for bury underground in order to prevent to electrocute after being connected with the earth connection, compound earth bar is including burying underground in compound stick underground, the lid fits being used for on compound stick top and is connected the earth connection and carry out the terminal cap that protects and involution in the bottom of compound stick that is used for guiding compound stick screw in underground and protect the utmost point of bottom of compound stick, compound stick includes core and cladding on the outer peripheral face of core and with the metallurgical stainless steel skin that combines of core, the core adopts low carbon steel core or pure iron core. The utility model discloses a compound earth bar utilizes the stainless steel skin that corrosion resistance is strong to protect the core, improves compound excellent corrosion resistance to because the outer faying face of the core that makes with carbon steel or pure iron of stainless steel combines for the metallurgy, and the combining ability is strong, therefore the outer not fragile of stainless steel, avoids accelerating the speed of corruption because the breach of impaired production.
Description
Technical Field
The utility model relates to a ground rod field, in particular to a compound ground rod.
Background
In order to prevent electric shock and other electric power accidents, power transmission equipment, building lightning protection systems and the like need to use a grounding rod to ground a grounding wire, the grounding rod is buried underground and is easily corroded by acid environments such as acid rain and acidic substances in soil, and the corrosion resistance of the grounding rod is paid attention to in order to ensure the service life of the grounding rod. The traditional earth bar in China mainly adopts galvanized steel, but the galvanized steel can corrode seriously or even break after being used for a period of time, and has to be replaced by a copper earthing device again. In recent years, many copper-clad steel ground rods are adopted, but the copper-clad steel ground rods are high in price, low in copper strength and incapable of being metallurgically combined with steel rods, and copper layers are easy to damage when buried; the corrosion resistance of copper in an acid environment is poor, and particularly, after a slight copper layer is corroded to form a notch, the exposed steel cast inner core can be corroded to be used up at an extremely fast speed, namely once the copper layer is corroded to form the notch, the whole copper-coated steel grounding rod loses the use value.
SUMMERY OF THE UTILITY MODEL
The utility model provides a composite grounding rod to solve the technical problem that the corrosion resistance of the existing grounding rod is poor.
According to an aspect of the utility model, a compound earth bar is provided, bury underground in order to prevent to electrocute after being connected for with the earth connection, compound earth bar is including burying underground in compound stick underground, the lid fits being used for on compound stick top and is connected the earth connection and carry out the terminal cap and the involution that protect to the top of compound stick in compound stick bottom and be used for guiding compound stick screw in underground and carry out the utmost point of protecting to the bottom of compound stick, compound stick includes core and cladding on the outer peripheral face of core and with the metallurgical stainless steel skin that combines of core, the core adopts low carbon steel core or pure iron core.
Further, the stainless steel outer layer has a thickness of 0.18mm to 2.0mm and the core has a diameter of 9.64mm to 49 mm.
Furthermore, the wiring cap is a stainless steel cap body or a copper cap body, and the thickness of the wiring cap is not less than 2.0 mm.
Furthermore, the wiring cap is provided with a wiring hole for connecting a grounding wire, and the lower surface of the wiring cap is provided with a first mounting groove matched with the top of the composite rod.
Further, the top of the composite rod is embedded in the first mounting groove and is connected with the wiring cap in a welding mode.
Further, the top of the composite rod is embedded to a depth of not less than 4 mm.
Further, the pole tip is made of stainless steel.
Furthermore, the top end of the pole tip is provided with a second mounting groove matched with the bottom of the composite rod.
Furthermore, the bottom of the composite rod is embedded in the second mounting groove and is connected with the pole tip in a welding mode.
Further, the bottom of the composite rod is embedded to a depth of not less than 8 mm.
The utility model discloses following beneficial effect has:
the utility model discloses a composite ground rod, the outer peripheral face cladding of core is passed through the stainless steel skin to the composite stick, the core adopts low carbon steel core or pure iron core, make the electric conductivity of composite stick meet the requirements, utilize the stainless steel skin that the resistance to corrosion is strong to protect the core, improve the corrosion resistance of composite stick, and because the bonding surface of stainless steel skin and the core that carbon steel or pure iron made is metallurgical combination, bonding capability is strong, therefore the stainless steel skin is not fragile, avoid accelerating the speed of corruption because of impaired breach that produces, in addition, close the top of composite stick and seal the bottom of composite stick through the terminal cap, the earth connection is connected with the terminal rod, guide composite stick screw in underground through the terminal tip, thereby protect the top and the bottom of composite stick respectively through terminal cap and terminal tip, avoid the core of composite stick top and bottom to be corroded with the direct contact of underground air and water, long service life, the later stage of also being convenient for simultaneously takes out compound earth bar and overhauls and maintains.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic structural diagram of a composite ground rod according to a preferred embodiment of the present invention.
Illustration of the drawings:
1. a composite rod; 11. a core; 12. an outer layer of stainless steel; 2. a wiring cap; 3. the pole tip.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.
Fig. 1 is a schematic structural diagram of a composite ground rod according to a preferred embodiment of the present invention.
As shown in fig. 1, the composite ground rod of the present embodiment is used for being buried underground after being connected with an electric power transmission device to prevent electric shock, and includes a composite rod 1 buried underground, a terminal cap 2 covering the top end of the composite rod 1 for connecting with the electric power transmission device and protecting the top end of the composite rod 1, and a pole tip 3 sealing the bottom end of the composite rod 1 for guiding the composite rod 1 to be screwed into the ground and protecting the bottom end of the composite rod 1, the composite rod 1 includes a core portion 11 and a stainless steel outer layer 12 covering the outer circumferential surface of the core portion 11 and metallurgically bonded to the core portion 11, and the core portion 11 is a low-carbon steel core or a pure iron core. The utility model discloses a composite ground rod, composite rod 1 is through stainless steel outer 12 cladding core 11, core 11 is low carbon steel core or pure iron core, make composite rod 1 electric conductivity meet the requirements, utilize stainless steel outer 12 that the resistance to corrosion is strong to protect core 11, improve composite rod 1's corrosion resistance, and because the combination surface of stainless steel outer 12 and core 11 that carbon steel or pure iron made is metallurgical combination, the combination ability is strong, therefore stainless steel outer 12 is not fragile, avoid accelerating the speed of corruption because of impaired breach that produces, in addition, cover the top of composite rod 1 and seal composite rod 1's bottom through pole point 3 through terminal cap 2, the earth connection is connected with the terminal rod, guide composite rod 1 screw in underground through pole point 3, thereby protect composite rod 1's top and bottom respectively through terminal cap 2 and pole point 3, avoid the core 11 of 1 top of compound stick and bottom and underground air and water direct contact and corroded, long service life, also be convenient for the later stage simultaneously takes out compound earth bar and overhauls and maintain. In the present example, the clad rod 1 is hot rolled from a clad billet of stainless steel and low carbon steel. Scanning electron microscope analysis is carried out on the joint of the stainless steel outer layer 12 of the composite rod 1 and the carbon steel of the core part 11, and the metal elements of carbon, chromium and nickel of the stainless steel outer layer 12 and the core part 11 are diffused mutually, so that metallurgical bonding is realized. Alternatively, the composite rod 1 is hot-rolled from a composite billet of stainless steel and pure iron. Optionally, the stainless steel outer layer 12 is 304 austenitic stainless steel material or 316 austenitic stainless steel material.
The thickness of the stainless steel outer layer 12 is 0.18mm-2.0mm, and the diameter of the core 11 is 9.64mm-49 mm. The larger the diameter of the core 11, the thicker the clad stainless steel outer layer 12, and the smaller the diameter of the core 11, the thinner the clad stainless steel outer layer 12, and the higher the electrical conductivity of the composite rod. In order to ensure the corrosion resistance of the composite rod 1, the thickness of the stainless steel of the outer layer is not less than 0.18 mm; meanwhile, in order to save cost, the thickness of the stainless steel outer layer 12 is controlled within 2mm, and the metallurgical bonding strength of the stainless steel outer layer 12 and the core part 11 is also favorably ensured.
The wiring cap 2 adopts a stainless steel cap body or a copper cap body. The thickness of the wiring cap 2 is not less than 2.0 mm. The lower surface of the wiring cap 2 is provided with a first mounting groove matched with the top of the composite rod 1. The top of the composite rod 1 is embedded in the first mounting groove and is connected with the wiring cap 2 in a welding mode. The top of the composite rod 1 is embedded in the first mounting groove, and the depth of the composite rod is not less than 4 mm. The pole tip 3 is made of stainless steel matrix. The top end of the pole tip 3 is provided with a second mounting groove matched with the bottom of the composite rod 1. The bottom of the composite rod 1 is embedded in the second mounting groove and is connected with the pole tip in a welding mode. The bottom of the composite rod 1 is embedded to a depth of not less than 8 mm. The bottom end of the composite rod 1 is embedded in the ground to a deeper depth, and the surrounding humidity is higher, so that the depth of the second mounting groove embedded into the pole tip 3 is deeper, and the protection area of the pole tip 3 to the bottom end of the composite rod 1 is larger. And respectively welding and fixing the wiring cap 2 and the pole tip 3 at the top and the bottom of the composite rod 1 under the protection of vacuum or inert gas so as to ensure the high quality of the welding surfaces of the wiring cap 2 and the top of the composite rod 1 and the pole tip 3 and the bottom of the composite rod 1. The welding of the top of the composite rod 1 and the wiring cap 2 and the welding of the bottom of the composite rod 1 and the pole tip 3 are all circumferential full-sealing welding, so that the core 11 is prevented from being corroded due to the fact that water penetrates from the welding position to be in contact with the end face of the composite rod 1. Optionally, the top of the composite rod 1 is interference fit or threaded with the first mounting groove. Optionally, the bottom of the composite rod 1 is interference fit or screw thread fit with the second mounting groove. Optionally, the surface of the pole tip 3 is threaded to facilitate drilling of the composite ground rod into the ground and secure attachment.
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. A composite ground rod is used for being buried underground after being connected with a ground wire to prevent electric shock,
the composite ground rod comprises a composite rod (1) buried underground, a wiring cap (2) covering the top end of the composite rod (1) and used for connecting a ground wire and protecting the top end of the composite rod (1), and a pole tip (3) sealed at the bottom end of the composite rod (1) and used for guiding the composite rod (1) to be screwed into the ground and protecting the bottom end of the composite rod (1), wherein the composite rod (1) comprises a core part (11) and a stainless steel outer layer (12) coated on the outer peripheral surface of the core part (11) and metallurgically combined with the core part (11), and the core part (11) adopts a low-carbon steel core body or a pure iron core body.
2. The composite ground rod of claim 1,
the thickness of the stainless steel outer layer (12) of the composite rod (1) is 0.18mm-2.0mm, and the diameter of the core part (11) is 9.64mm-49 mm.
3. The composite ground rod of claim 1,
the wiring cap (2) is a stainless steel cap body or a copper cap body, and the thickness of the wiring cap (2) is not less than 2.0 mm.
4. The composite ground rod of claim 1,
the wiring cap (2) is provided with a wiring hole for connecting a grounding wire,
the lower surface of the wiring cap (2) is provided with a first mounting groove matched with the top of the composite rod (1).
5. The composite ground rod of claim 4,
the top of the composite rod (1) is embedded in the first mounting groove and is connected with the wiring cap (2) in a welding mode.
6. The composite ground rod of claim 4,
the top of the composite rod (1) is embedded to a depth of not less than 4 mm.
7. The composite ground rod of claim 1,
the pole tip (3) adopts a stainless steel matrix.
8. The composite ground rod of claim 1,
the top end of the pole tip (3) is provided with a second mounting groove matched with the bottom of the composite rod (1).
9. The composite ground rod of claim 7,
the bottom of the composite rod (1) is embedded in the second mounting groove and is connected with the pole tip (3) in a welding mode.
10. The composite ground rod of claim 7,
the bottom of the composite rod (1) is embedded to a depth of not less than 8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021421117.4U CN213520351U (en) | 2020-07-17 | 2020-07-17 | Composite ground rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021421117.4U CN213520351U (en) | 2020-07-17 | 2020-07-17 | Composite ground rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213520351U true CN213520351U (en) | 2021-06-22 |
Family
ID=76434556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021421117.4U Active CN213520351U (en) | 2020-07-17 | 2020-07-17 | Composite ground rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213520351U (en) |
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2020
- 2020-07-17 CN CN202021421117.4U patent/CN213520351U/en active Active
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