CN104241907B - Grounding device - Google Patents

Grounding device Download PDF

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Publication number
CN104241907B
CN104241907B CN201410492775.5A CN201410492775A CN104241907B CN 104241907 B CN104241907 B CN 104241907B CN 201410492775 A CN201410492775 A CN 201410492775A CN 104241907 B CN104241907 B CN 104241907B
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CN
China
Prior art keywords
face
nut
ring
earth rod
grafting 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.)
Active
Application number
CN201410492775.5A
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Chinese (zh)
Other versions
CN104241907A (en
Inventor
王赫
张峰
王玉景
郑思源
梅珞
刘欢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANJING WENTAIYUAN ELECTRIC POWER SCIENCE & TECHNOLOGY Co Ltd
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nanjing Power Supply Co of Jiangsu Electric Power Co
Original Assignee
NANJING WENTAIYUAN ELECTRIC POWER SCIENCE & TECHNOLOGY Co Ltd
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nanjing Power Supply Co of Jiangsu Electric Power Co
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Publication date
Application filed by NANJING WENTAIYUAN ELECTRIC POWER SCIENCE & TECHNOLOGY Co Ltd, State Grid Corp of China SGCC, State Grid Jiangsu Electric Power Co Ltd, Nanjing Power Supply Co of Jiangsu Electric Power Co filed Critical NANJING WENTAIYUAN ELECTRIC POWER SCIENCE & TECHNOLOGY Co Ltd
Priority to CN201410492775.5A priority Critical patent/CN104241907B/en
Publication of CN104241907A publication Critical patent/CN104241907A/en
Application granted granted Critical
Publication of CN104241907B publication Critical patent/CN104241907B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention relates to a grounding device which comprises a grounding box (2), a grounding rod (4), a connector ring (3) and a nut (1). The connector ring (3) is connected to a corresponding wall of the grounding box (2); the grounding rod (4) is inserted in the connector ring (3); the nut sleeves the grounding rod (4) and is screwed with the connector ring (3). Besides, the grounding rod (1) is of a stepped end face (1) which corresponds to an outer end face (31) of the connector ring (3); after the nut (1) is screwed, the stepped end face (1) is abutted against the outer end face (31) on the connector ring (3) and the stepped end face is connected with the outer end face. Since the stepped end face of the grounding rod and the end face of the connector ring are in abutting joint, a contact cylindrical surface of the grounding rod is matched with an inner ring surface of the connector ring (3) to expand contact area of the grounding rod and the connector ring, contact resistance is reduced, reliable discharge is achieved during grounding of equipment, and operators can detect the equipment in a safe environment.

Description

Grounding device
Technical field
The present invention relates to T & D Technology field, more particularly to grounding device.
Background technology
Electric substation or power plant, in detection or maintenance of equipment, are that the safety need for ensureing operator connect the equipment Ground, will use a copper earth rod during ground connection, earth rod is to be grounded box by grafting one to make equipment ground.
It is provided with grafting ring made by copper material in ground connection box, earth rod is plugged in the grafting being connected on ground connection box Ring, so forms an earth-return circuit, makes equipment institute with the high potential electric current that discharges over the ground of formation.
Such as Fig. 1, existing earth rod 5 is provided with the conical surface 51, the conical surface side circumferencial direction at least provided with 2 pins 53, nut 1 is set in earth rod 5 by the hole 11 on end face and spiral connects grafting ring 3, corresponding to the radial outer end of pin 53 With diameter greater than the aperture in hole 11, tightening nut 1, the inner side end of nut 1 is set to promote earth rod 5 into ground connection box by pin 53 Side moves axially, and the conical surface 51 thereon is resisted against on grafting ring 3, forms the linear contact lay 52 of annular.Due to the contact of linear contact lay Area is little, and the electric current for passing through is little, and contact resistance is big, is particularly easy to form electric arc sintering at loose contact, and destroys contact surface Flat smooth, thus can cause more serious loose contact, be so grounded box and earth rod often not using just not scrapping several times Can not reuse, cause very big waste.
The content of the invention
It is an object of the invention to provide one kind is when being grounded, a kind of earth rod ground connection dress big with grafting loop interface Put.
To realize the purpose, the present invention devises such a grounding device:
The grounding device includes ground connection box (2), earth rod (4), grafting ring (3) and nut (1), and the grafting ring (3) is even It is connected on ground connection box (2) the correspondence wall shell, earth rod (4) is plugged in grafting ring (3), and nut (1) is set in earth rod (4) And spiral connection grafting ring (3);Wherein:The earth rod (4) is provided with a step end face (421), the step end face (421) It is corresponding with the end face outside (31) on grafting ring (3), tightening nut (1), step end face (11) is against outside on grafting ring (3) Side end face (31), both ends of the surface electrical connection.
In order to further increase the contact area of earth rod (4) and grafting ring (3), the earth rod (4) is provided with and inserts The contact face of cylinder (41) that ring (3) inner ring surface (33) is adapted is connect, the inner ring surface (33) electrically connects with the face of cylinder (41) is contacted.
Further, the nut (1) is provided with hole (11), and nut (1) is set in earth rod by the hole (11) (4)。
In order to promote earth rod (4) to move axially and increase contact surface into ground connection box at tightening nut (1), described Rank end face (421) is the anchor ring (43) with earth rod (4) coaxial line, and. the outside diameter of the anchor ring (43) is more than spiral shell The aperture in the hole (11) on female (1).
Further, the cylindrical side of the 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 end face corresponding with grafting ring (3) on earth rod (4), the externally threaded axial direction on grafting ring Axial length of the length more than the female thread of nut (1).
By arranging step on earth rod, in tightening nut, one side end face of nut promotes the step to the present invention, makes Earth rod is moved axially, and the step end face of step side and the end face of grafting ring are against realizing the good electrical connection of both ends of the surface, together When earth rod on the face of cylinder be adapted with the inner ring surface of grafting ring, realize that the face of cylinder electrically connects with the good of inner ring surface, so By increasing the contact area of both earth rod and grafting ring, reducing contact resistance, can reliably discharge in equipment ground, protect Card operator are overhauled or detection operation under fool proof environment.
Description of the drawings
Fig. 1 is that existing earth rod is mutually inserted the schematic diagram being electrically connected with grafting ring.
Fig. 2 is the structural representation of present invention ground connection box.
Fig. 3 is the view that nut is not tightened on grafting ring.
Fig. 4 is view of the nut on grafting ring.
Specific embodiment
Such as Fig. 2, grounding device of the present invention has a ground connection box 2, is connected by close-fitting mode on the side wall of ground connection box 2 Grafting ring 3.The grafting ring 3 is made with copper material, and on the periphery that it stretches out ground connection box 2 lateral wall external screw thread is provided with, and connects Ground rod 4 is plugged in the inner ring surface 33 of grafting ring 3.
Such as Fig. 3, with the earth rod 1 that formed is combined by multiple diameters difference cylinder made by copper material step 42 is provided with The step side forms step end face 421, and the step end face 421 is the anchor ring with the coaxial line of earth rod 4, in step end face 421 sides are provided with the face of cylinder 41 being adapted with the inner ring surface of grafting ring 3, are allowed to be in the inner ring surface of grafting ring 3 and excessively match somebody with somebody Conjunction state.In earth rod 1 and grafting 3 grafting of ring, good contact was both kept, again can be easily more axial in inner ring surface 33 Slide.
The end face of nut 1 is provided with hole 11, and nut 1 is set on earth rod 4 by the hole 11, and the aperture in the hole is less than The outside diameter of annular step end face 11, while the axial length of the female thread of nut 1 is less than externally threaded axle on grafting ring 3 To length.So, it is connected to the external screw thread of grafting ring 3 by female thread spiral thereon in nut 1, and to screwing direction During rotation, the step 42 of earth rod 1 can be promoted by the inner side end 12 of nut 1, earth rod 4 is moved into ground connection box 2, when When nut 1 is tightened in completely the external screw thread on grafting ring 3, the step end face 421 on earth rod 4 is resisted against outer on grafting ring 3 On side end face 31, and the contact face of cylinder 41 is more plugged in the inner ring surface 33 of grafting ring 3, referring to Fig. 4 on earth rod 4. When earth rod 4 has electric current to pass through, because earth rod 4 and the grafting ring 3 of the present invention have more contact surfaces, the junction that is electrically connected is big, Be conducive to transmitting bigger electric current, be not likely to produce the phenomenon of loose contact, discharge effect is more reliable, setting electric substation or power plant During standby detection, residing operating environment is safer.

Claims (5)

1. grounding device, including ground connection box(2), earth rod(4), grafting ring(3)And nut(1), the grafting ring(3)It is connected to The ground connection box(2)On the wall of side, earth rod(4)It is plugged on grafting ring(3)In, nut(1)It is set in earth rod(4)And spiral Connection grafting ring(3);It is characterized in that:The earth rod(4)It is provided with a step end face(421), the step end face(421) With grafting ring(3)On end face outside(31)It is corresponding, and step end face(421)Side is provided with and grafting ring(3)Inner ring surface The face of cylinder being adapted(41), the face of cylinder(41)With grafting ring(3)Inner ring surface excessively coordinate, on the cylindrical side of grafting ring Be provided with for nut(1)The external screw thread of spiral connection, the externally threaded length on grafting ring is more than nut(1)Female thread it is long Degree, tightening nut(1), step end face(421)Against grafting ring(3)On end face outside(31), both ends of the surface electrical connection.
2. grounding device according to claim 1, it is characterised in that:The grafting ring(3)Inner ring surface and earth rod(4) The face of cylinder(41)Electrical connection.
3. grounding device according to claim 1, it is characterised in that:Nut(1)It is provided with hole(11), nut(1)Pass through The hole(11)It is set in earth rod(4).
4. grounding device according to claim 3, it is characterised in that:The step end face(421)It is and earth rod(4)Together The disk of axis(43).
5. grounding device according to claim 4, it is characterised in that:The disk(43)With diameter greater than nut(1)On The hole(11)Aperture.
CN201410492775.5A 2014-09-24 2014-09-24 Grounding device Active CN104241907B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410492775.5A CN104241907B (en) 2014-09-24 2014-09-24 Grounding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410492775.5A CN104241907B (en) 2014-09-24 2014-09-24 Grounding device

Publications (2)

Publication Number Publication Date
CN104241907A CN104241907A (en) 2014-12-24
CN104241907B true CN104241907B (en) 2017-04-19

Family

ID=52229541

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410492775.5A Active CN104241907B (en) 2014-09-24 2014-09-24 Grounding device

Country Status (1)

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CN (1) CN104241907B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107834224A (en) * 2017-11-29 2018-03-23 马文骏 A kind of electric power grounding device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207588A (en) * 1980-02-02 1993-05-04 Multifastener Corporation Electrical grounding stud
FR2701603B1 (en) * 1993-02-16 1995-04-14 Alcatel Telspace Electrical ground connection system between a coaxial base and a soleplate of a microwave circuit and electrical connection device used in such a system.
DE20217501U1 (en) * 2002-11-13 2003-02-06 Hummel Anton Verwaltung cable connection
CN201038609Y (en) * 2007-05-24 2008-03-19 镇江市科捷电器有限公司 Electromagnetic earthing lock
CN204144512U (en) * 2014-09-24 2015-02-04 江苏省电力公司南京供电公司 Earthing device

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