CN107449943A - A kind of earth clamp for lightning arrester live-line test - Google Patents
A kind of earth clamp for lightning arrester live-line test Download PDFInfo
- Publication number
- CN107449943A CN107449943A CN201710621722.2A CN201710621722A CN107449943A CN 107449943 A CN107449943 A CN 107449943A CN 201710621722 A CN201710621722 A CN 201710621722A CN 107449943 A CN107449943 A CN 107449943A
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- CN
- China
- Prior art keywords
- clamp
- earth
- upper clamp
- collet segment
- permanent magnet
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Clamps And Clips (AREA)
Abstract
The invention discloses a kind of earth clamp for lightning arrester live-line test, earth clamp includes upper clamp, lower clamp, spring, the first permanent magnet and the second permanent magnet；Upper clamp and lower clamp are hinged, and spring is located at pin joint, and the collet segment of upper clamp and the collet segment of lower clamp are used to clamp arrester ground pole；The collet segment of upper clamp is provided with the first permanent magnet, and the collet segment of lower clamp is provided with the second permanent magnet, and two permanent magnets are used to provide electromagnetic force, earth clamp is connected with arrester surface-stable with chucking power collective effect in electromagnetic force.There are the contact chip being sequentially connected, neon tube and resistance in upper clamp enclosed inside, a working contact part is packaged in inside upper clamp, and another part is located at outside upper clamp, and working contact one end is connected with resistance；It can judge the powered situation of arrester.
Description
Technical field
The invention belongs to power system testing tool field, more particularly, to a kind of for lightning arrester live-line test
Novel grounded clip.
Background technology
Zinc-Oxide Arrester (MOA) is the protection equipment for protecting electrical equipment against the infringement of various overvoltage, its
Occur that built-in electrical insulation makes moist and the defects of valve block aging during longtime running, cause the increase of leakage current of an arrester, when serious
Thermal runaway can also be caused, influence electric power safety production, it is therefore desirable to periodically carry out preventive trial, whether determine its working condition
Well, and the requirement of power supply reliability causes zinc oxide arrester test by switching to live testing based on original power failure prerun
Based on, live testing work is strengthened.Zinc oxide lightning arrester live-line test can be in the case of without having a power failure, by keeping away
The measurement of resistive component judges the aging of valve block and situation of making moist in the leakage current of thunder device valve block.Taken shelter from the thunder carrying out zinc oxide
During device live testing, it is necessary first to connect three in order respectively by the p-wire effective grounding of tester, then by three-phase p-wire
The arrester side of phase counter of lightning arrester.It is several that ground connection can be generally divided into working earthing, lightning protection and protective grounding, main
It is steady to personal safety and equipment if the neutral point or exposed current-carrying part of system or device are connected through wire with the earth
Surely play a protective role.The lower end grounded part of engineering Zinc-Oxide Arrester in practice is a smooth earthing rod, only in its table
There is a small amount of exposed nut in face, and traditional earth clamp is difficult to find an effective stress point, or to be connected on nut reluctantly naked
Reveal part but be not sufficiently stable, it is difficult to meet the requirement of test, potential safety hazard be present.Meanwhile it is actually detected in inevitably
That earth point or ground connection facility mark are not clear be present, testing crew may occur to be mistakenly considered to be grounded by actual powered point
Point, at this moment once carrying out the operation such as grounding connection, test failure is not only resulted in, personnel and equipment peace can be also endangered when serious
Entirely.Therefore, for the specific requirement of Zinc oxide lightning arrester live-line test, it would be desirable to which finding a kind of earth point that can both distinguish is
No effective grounding, the enough novel grounded clips that stable gripping is realized in the case of without effective stress point of and can.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of for lightning arrester live-line test
Earth clamp, it can not realize in the case of without effective stress point its object is to solving existing earth clamp and stably be connected to
Technical problem on arrester.
To achieve the above object, the invention provides a kind of earth clamp for lightning arrester live-line test, including：
Upper clamp, lower clamp, spring, the first permanent magnet and the second permanent magnet；Upper clamp and lower clamp are hinged, spring position
In pin joint, the collet segment of upper clamp and the collet segment of lower clamp are used to clamp arrester ground pole；
The collet segment of upper clamp is provided with the first permanent magnet, and the collet segment of lower clamp is provided with the second permanent magnet, and two
Individual permanent magnet is used to provide electromagnetic force, earth clamp is connected with arrester surface-stable under electromagnetic force and chucking power collective effect
Connect.
Preferably, there are the contact chip being sequentially connected, luminous tube and resistance, working contact one in upper clamp enclosed inside
Enfeoffment is loaded on inside upper clamp, and another part is located at outside upper clamp, and working contact one end is connected with resistance.
Preferably, working contact is cased with contact sleeve, for accommodating working contact.
Preferably, upper clamp collet segment and lower clamp collet segment are equipped with the opening of circular shape, form holding holes；
Can to effective stress point be present in the case of clamp.
Preferably, earth clamp also includes connection sheet, and connection sheet is fixed on lower clamp end, for connecting with tester
Connect.
Preferably, protection sleeve pipe is cased with upper clamp and lower clamp, prevents from leaking electricity.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
1st, the insertion of permanent magnet causes to be that smooth cylinder and only a small amount of nut etc. are available for clamping in face of earth point
During position, the effect of chuck front end electromagnetic force can be relied on, is bonded with smooth cylinder, or increase the work to being not easy retaining part
Firmly so that earth clamp can be with earth point reliable contacts.
2nd, the design of live detection link causes before ground connection operation is started, and can prejudge the band point of measuring point to be checked
Situation, in the case where confirming that earth point ground connection is true, probability of failure can be reduced, improves test reliability and security.
3rd, clip outer surface is all covered by insulating sheath, is avoided contacting with the direct of operating personnel, is reduced Danger Electric shock risk；
It is simple in construction, it is easy to use.
Brief description of the drawings
Fig. 1 is the structural representation provided by the present invention for the earth clamp of lightning arrester live-line test.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
Fig. 1 is the structural representation provided by the present invention for the earth clamp of lightning arrester live-line test.Earth clip attached bag
Upper clamp and lower clamp are included, upper clamp is made up of upper grip 1 and upper clamp holder 3, and lower clamp is made up of lower chuck 2 and lower clamp holder 4, on
Chuck 1 and the end of lower chuck 2 are hinged by jump ring 9, and hinged place jump ring 9 is fixed on upper clamp holder 3 with by fixing bolt 7
The junction of clamp holder 4, and impetus during as clip folding.The first permanent magnet is provided with the head end of upper grip 1, it is first in lower chuck 2
End is provided with the second permanent magnet, and permanent magnet volume accounts for front port volume 80%, and two permanent magnets are used to make earth clip by electromagnetic force
Son is connected with arrester surface-stable.It is the face of joining of upper clamp holder 3 and lower clamp holder 4 at the chuck side of bolt front end, then toward chuck
Respectively there is the opening of one section of circular shape on front end upper grip 1 and lower chuck 2, form holding holes 5, the lower end of clamp holder 4 is by connecting spiral shell
Bolt 8 is crosslinked with the phase of connection sheet 10, and connection sheet 10 is connected with tester.Earth clamp also includes the metal contact chip being connected with each other
12nd, contact spring 13, neon tube 14, big resistance 15, contact sleeve 16 and working contact 17, the outer layer of working contact 17 suit contact set
Pipe 16, contact spring 13, neon tube 14, big resistance 15 are encapsulated in upper clamp, and the part of working contact 17 is encapsulated in upper clamp,
Another part is located at outside upper clamp.By metal contact chip 12, contact spring 13, neon tube 14, big resistance 15 and working contact 17
The detection circuit of composition, whether powered for detecting earth point, the big resistance value of resistance 15 used at 2 megaohms or so, touch by work
First 17 material is common metal electrode material, using scalable mode, can be completely retracted into contact sleeve, exposed electricity during pull-out
Pole length is about 2 centimetres.Earth clamp provided by the invention, pass through chucking power and the collective effect of electromagnetic adsorption power in clamping
Effective bonding to more difficult retaining part is realized, reaches reliable ground.
Chuck and clamp holder of the present invention is characterized in that to be stainless steel material, and surface covers one layer of electro-insulating rubber
Set is played a protective role, and permanent magnet is not contacted directly using inline mode sealing insertion with outside air in chuck.Institute of the present invention
It highly is about 10mm to state for holding holes, the connection sheet of clamp holder end for test needed for wire be connected.
The present invention is described further with reference to specific embodiment.In actual use, carry out first
It is whether powered test link.Tester is needed to pull out working contact 17 from contact sleeve, and finger is gently against into gold
Belong on contact chip 12, contacted with test point, powered situation is judged by whether lighting for neon lamp, if neon lamp is lighted, proved
Test point is powered, is improper ground connection, if neon lamp does not work, proves that test point is not charged, is normal ground, uses completion
Afterwards, working contact 17 is pushed back in contact sleeve 16.
After test point is defined as normal ground, for different types of earth point, it is respectively described below.
Application scenarios 1：
There is position such as earth lead for being capable of reliable retention etc. near earth point, directly put it into holding holes 5, profit
Chucking power realizes reliable ground so that earth clip is tightly clamped caused by being tightened up with jump ring 8.
Application scenarios 2：
Without reliable retaining part near earth point, by taking the nut that exposed height only has about 5mm as an example, clamping
When, nut exposed part is put into holding holes 5, about reaches the half of the height of holding holes 5, and permanent magnet 10 exists with nut and attachment surface
Electromagnetic adsorption power acts on, and under the collective effect of chucking power and electromagnetic adsorption power, ensures that earth clip tightly bonds, is grounded folder
Reliable ground.
Application scenarios 3：
When earth point be smooth cylinder without can retaining part, be directly fitted in post after earth clip side is cleaned out
On face, earth clip is tightly bonded with earth point using electromagnetic adsorption power caused by the permanent magnet 10 of chuck port insertion, realize
Reliable ground.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (6)
- A kind of 1. earth clamp for lightning arrester live-line test, it is characterised in that including：Upper clamp, lower clamp, spring, the first permanent magnet and the second permanent magnet；The upper clamp and the lower clamp are hinged, institute State spring and be located at pin joint, the collet segment of the collet segment of the upper clamp and the lower clamp is used to clamp arrester ground Pole；The collet segment of the upper clamp is provided with first permanent magnet, and the collet segment of the lower clamp is provided with described Two permanent magnets, two permanent magnets are used to provide electromagnetic force, and earth clamp is made under electromagnetic force and chucking power collective effect with taking shelter from the thunder Device surface-stable connects.
- 2. earth clamp as claimed in claim 1, it is characterised in that have the contact being sequentially connected in upper clamp enclosed inside Piece, luminous tube and resistance, a working contact part are packaged in inside upper clamp, and another part is located at outside upper clamp, and work Make contact one end to be connected with resistance.
- 3. earth clamp as claimed in claim 2, it is characterised in that the working contact is cased with contact sleeve, for accommodating The working contact.
- 4. the earth clamp as described in any one of claims 1 to 3, it is characterised in that the upper clamp collet segment and described Lower clamp collet segment is equipped with the opening of circular shape, forms holding holes；Can to effective stress point be present in the case of clamp.
- 5. the earth clamp as described in any one of claims 1 to 3, it is characterised in that the earth clamp also includes connection sheet, Connection sheet is fixed on the lower clamp end, for being connected with tester.
- 6. the earth clamp as described in any one of claims 1 to 3, it is characterised in that on the upper clamp and the lower clamp Protection sleeve pipe is cased with, prevents from leaking electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710621722.2A CN107449943A (en) | 2017-07-27 | 2017-07-27 | A kind of earth clamp for lightning arrester live-line test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710621722.2A CN107449943A (en) | 2017-07-27 | 2017-07-27 | A kind of earth clamp for lightning arrester live-line test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107449943A true CN107449943A (en) | 2017-12-08 |
Family
ID=60489743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710621722.2A Pending CN107449943A (en) | 2017-07-27 | 2017-07-27 | A kind of earth clamp for lightning arrester live-line test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107449943A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2032120A (en) * | 1978-10-17 | 1980-04-30 | Haslam J D | Voltage tester |
| EP1864757A1 (en) * | 2006-06-08 | 2007-12-12 | Research In Motion Limited | Use of magnets to provide resilience |
| CN203164274U (en) * | 2013-04-08 | 2013-08-28 | 李涛 | Test pencil |
| CN203191410U (en) * | 2013-01-29 | 2013-09-11 | 福建省电力有限公司 | Zinc oxide arrester live testing junction device |
| CN203705482U (en) * | 2013-12-16 | 2014-07-09 | 国家电网公司 | Dedicated wiring clamping tool for testing insulating property of lightning arrester |
| CN203967280U (en) * | 2014-06-04 | 2014-11-26 | 国家电网公司 | A kind of extra high voltage line grounding wire clip |
| CN104407180A (en) * | 2014-11-28 | 2015-03-11 | 国家电网公司 | Special wire clamp for performing charged test on lightning arrester |
| CN205176073U (en) * | 2015-12-10 | 2016-04-20 | 国网四川省电力公司眉山供电公司 | Arrester live test drainage pincers |
| CN106654607A (en) * | 2017-03-16 | 2017-05-10 | 陈爱军 | Magnetic grounding clamp and portable low-voltage protective grounding wire |
-
2017
- 2017-07-27 CN CN201710621722.2A patent/CN107449943A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2032120A (en) * | 1978-10-17 | 1980-04-30 | Haslam J D | Voltage tester |
| EP1864757A1 (en) * | 2006-06-08 | 2007-12-12 | Research In Motion Limited | Use of magnets to provide resilience |
| CN203191410U (en) * | 2013-01-29 | 2013-09-11 | 福建省电力有限公司 | Zinc oxide arrester live testing junction device |
| CN203164274U (en) * | 2013-04-08 | 2013-08-28 | 李涛 | Test pencil |
| CN203705482U (en) * | 2013-12-16 | 2014-07-09 | 国家电网公司 | Dedicated wiring clamping tool for testing insulating property of lightning arrester |
| CN203967280U (en) * | 2014-06-04 | 2014-11-26 | 国家电网公司 | A kind of extra high voltage line grounding wire clip |
| CN104407180A (en) * | 2014-11-28 | 2015-03-11 | 国家电网公司 | Special wire clamp for performing charged test on lightning arrester |
| CN205176073U (en) * | 2015-12-10 | 2016-04-20 | 国网四川省电力公司眉山供电公司 | Arrester live test drainage pincers |
| CN106654607A (en) * | 2017-03-16 | 2017-05-10 | 陈爱军 | Magnetic grounding clamp and portable low-voltage protective grounding wire |
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Legal Events
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171208 |