CN204144512U - Earthing device - Google Patents
Earthing device Download PDFInfo
- Publication number
- CN204144512U CN204144512U CN201420551145.6U CN201420551145U CN204144512U CN 204144512 U CN204144512 U CN 204144512U CN 201420551145 U CN201420551145 U CN 201420551145U CN 204144512 U CN204144512 U CN 204144512U
- Authority
- CN
- China
- Prior art keywords
- face
- earth rod
- grafting ring
- nut
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007689 inspection Methods 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 230000004323 axial length Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
Abstract
The utility model relates to earthing device, comprise ground connection box (2), earth rod (4), grafting ring (3) and nut (1), described grafting ring (3) is connected on ground connection box (2) corresponding wall, earth rod (4) is plugged in grafting ring (3), and nut (1) is set in earth rod (4) and spiral connects grafting ring (3); Earth rod (1) is provided with a step end face (1), and step end face (1) is corresponding with the end face outside (31) on grafting ring (3), tightening nut (1), and step end face (1) is against the end face outside (31) on grafting ring (3), and both ends of the surface connect.The utility model by the step end face that arranges on earth rod and grafting ring end face against, and coordinate by the inner ring surface of earth rod the contact face of cylinder and grafting ring (3) contact area increasing both, reduce contact resistance, reliably can discharge when equipment ground, ensure that operating personnel carry out equipment Inspection under foolproof environment.
Description
Technical field
The utility model relates to T & D Technology field, particularly relates to earthing device.
Background technology
Electric substation or power plant detect or maintenance of equipment time, for ensureing that the security needs of operating personnel are by described equipment ground, will use a copper earth rod during ground connection, earth rod makes equipment ground by grafting one ground connection box.
Be provided with the grafting ring made with copper material in ground connection box, earth rod is plugged in the grafting ring be connected on ground connection box, like this formed a grounded circuit, make equipment form with high potential the electric current discharged over the ground.
As Fig. 1, existing earth rod 5 is provided with the conical surface 51, circumferencial direction in this conical surface side at least arranges 2 pins 53, nut 1 is set in earth rod 5 by the hole 11 on end face and spiral connects grafting ring 3, diameter corresponding to pin 53 radial outer end is greater than the aperture in hole 11, tightening nut 1, makes the inner side end of nut 1 promote earth rod 5 by pin 53 and moves axially inside ground connection box, the conical surface 51 on it is resisted against on grafting ring 3, forms the linear contact lay 52 of annular.Because the contact area of linear contact lay is little, the electric current passed through is little, contact resistance is large, easy especially at loose contact place formation electric arc sintering, and destroy the flat smooth of contact-making surface, can cause more serious loose contact thus, such ground connection box and earth rod often do not use just to be scrapped several times and can not re-use, and causes very large waste.
Summary of the invention
The purpose of this utility model is to provide a kind of when needing ground connection, the large a kind of earthing device of earth rod and grafting loop contacts face.
For realizing described object, the utility model devises so a kind of earthing device:
This earthing device comprises ground connection box (2), earth rod (4), grafting ring (3) and nut (1), described grafting ring (3) is connected on the corresponding wall shell of described ground connection box (2), earth rod (4) is plugged in grafting ring (3), and nut (1) is set in earth rod (4) and spiral connects grafting ring (3); Wherein: described earth rod (1) is provided with a step end face (11), described step end face (11) is corresponding with the end face outside (31) on grafting ring (3), tightening nut (1), step end face (11) is against the end face outside (31) on grafting ring (3), and both ends of the surface are electrically connected.
In order to increase the contact area of earth rod (4) and grafting ring (3) further, described earth rod (4) is provided with the contact face of cylinder (41) suitable with grafting ring (3) inner ring surface (33), described inner ring surface (33) with contact the face of cylinder (41) and be electrically connected.
Further, described nut (1) is provided with hole (11), and nut (1) is set in earth rod (4) by described hole (11).
Move axially in ground connection box to promote earth rod (4) when tightening nut (1) and increase contact-making surface, described step end face (1) is the anchor ring (43) with earth rod (4) coaxial line, and. the outside diameter of described anchor ring (43) is greater than the aperture in the described hole (11) on nut (1).
Further, the cylindrical side of described grafting ring is provided with the external screw thread for being connected with nut (1) spiral; In order to ensure the reliable contacts of the step end face on earth rod (4) and grafting ring (3) corresponding end face, the externally threaded axial length on grafting ring is greater than the axial length of the internal thread of nut (1).
The utility model by arranging step on earth rod, when tightening nut, one side end face of nut promotes this step, earth rod is moved axially, the step end face of step side and the end face of grafting ring against, the good electrical realizing both ends of the surface connects, the face of cylinder simultaneously on earth rod and the inner ring surface of grafting ring suitable, realize the face of cylinder to be connected with the good electrical of inner ring surface, like this by increasing the contact area of earth rod and grafting ring, reduce contact resistance, can reliably discharge when equipment ground, ensure that operating personnel carry out overhauling or detecting operation under foolproof environment.
Accompanying drawing explanation
Fig. 1 schematic diagram that to be existing earth rod carry out with the mutual grafting of grafting ring is electrically connected.
Fig. 2 is the structural representation of the utility model ground connection box.
Fig. 3 is the view that nut is not tightened on grafting ring.
Fig. 4 is the view of nut on grafting ring.
Embodiment
As Fig. 2, the utility model earthing device has a ground connection box 2, and this ground connection box 2 one sidewall connects grafting ring 3 by close-fitting mode.This grafting ring 3 is made with copper material, and the periphery that it stretches out ground connection box 2 lateral wall is provided with external screw thread, and earth rod 4 is plugged in this grafting ring 3 inner ring surface 33.
As Fig. 3, be provided with this step side of step 42 with the earth rod 1 be combined to form by the different cylinder of multiple diameter that copper material is made and form step end face 421, this step end face 421 is the anchor ring with earth rod 4 coaxial line, be provided with the face of cylinder 41 suitable with the inner ring surface of grafting ring 3 in step end face 421 side, make it to be in excessive mated condition with the inner ring surface of grafting ring 3.When earth rod 1 is with 3 grafting of grafting ring, both kept good contact, and can slide axially in inner ring surface 33 more like a cork again.
One end face of nut 1 is provided with hole 11, and nut 1 is set on earth rod 4 by this hole 11, and the aperture in this hole is less than the outside diameter of annular step end face 11, and the axial length of the internal thread of nut 1 is less than externally threaded axial length on grafting ring 3 simultaneously.Like this, the described external screw thread of grafting ring 3 is connected to by the internal thread spiral on it at nut 1, and to when screwing direction rotation, inner side end 12 by nut 1 promotes the step 42 of earth rod 1, earth rod 4 is moved in ground connection box 2, when nut 1 is tightened in the external screw thread on grafting ring 3 completely, step end face 421 on earth rod 4 is resisted against in the end face outside 31 on grafting ring 3, and earth rod 4 contacting the face of cylinder 41 is plugged in the inner ring surface 33 of grafting ring 3, see Fig. 4 more.When earth rod 4 has electric current to pass through, because earth rod 4 of the present utility model has more contact-making surface with grafting ring 3, the junction that is electrically connected is large, be conducive to transmitting larger electric current, not easily produce the phenomenon of loose contact, discharge effect is more reliable, and make electric substation or power plant when equipment Inspection, residing operating environment is safer.
Claims (5)
1. earthing device, comprise ground connection box (2), earth rod (4), grafting ring (3) and nut (1), described grafting ring (3) is connected on the corresponding wall of described ground connection box (2), earth rod (4) is plugged in grafting ring (3), and nut (1) is set in earth rod (4) and spiral connects grafting ring (3); It is characterized in that: described earth rod (1) is provided with a step end face (1), described step end face (1) is corresponding with the end face outside (31) on grafting ring (3), tightening nut (1), step end face (1) is against the end face outside (31) on grafting ring (3), and both ends of the surface are electrically connected.
2. earthing device according to claim 1, is characterized in that: described earth rod (4) is provided with the face of cylinder suitable with grafting ring (3) inner ring surface, and described inner ring surface is electrically connected with the face of cylinder.
3. earthing device according to claim 1, is characterized in that: nut (1) is provided with hole (11), and nut (1) is set in earth rod (4) by described hole (11).
4. earthing device according to claim 3, is characterized in that: described step end face (1) is the disk (43) with earth rod (4) coaxial line.
Earthing device according to claim 4, is characterized in that: the diameter of described disk (43) is greater than the aperture in the described hole (11) on nut (1).
5. earthing device according to claim 1, is characterized in that: the cylindrical side of described grafting ring is provided with the external screw thread for being connected with nut (1) spiral, and the externally threaded length on grafting ring is greater than the internal thread length of nut (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420551145.6U CN204144512U (en) | 2014-09-24 | 2014-09-24 | Earthing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420551145.6U CN204144512U (en) | 2014-09-24 | 2014-09-24 | Earthing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204144512U true CN204144512U (en) | 2015-02-04 |
Family
ID=52421177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420551145.6U Expired - Fee Related CN204144512U (en) | 2014-09-24 | 2014-09-24 | Earthing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204144512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241907A (en) * | 2014-09-24 | 2014-12-24 | 江苏省电力公司南京供电公司 | Grounding device |
-
2014
- 2014-09-24 CN CN201420551145.6U patent/CN204144512U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241907A (en) * | 2014-09-24 | 2014-12-24 | 江苏省电力公司南京供电公司 | Grounding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20200924 |