CN106653411A - Method for preventing poor contact of high-voltage switch - Google Patents
Method for preventing poor contact of high-voltage switch Download PDFInfo
- Publication number
- CN106653411A CN106653411A CN201611122227.9A CN201611122227A CN106653411A CN 106653411 A CN106653411 A CN 106653411A CN 201611122227 A CN201611122227 A CN 201611122227A CN 106653411 A CN106653411 A CN 106653411A
- Authority
- CN
- China
- Prior art keywords
- spring
- band
- protection band
- protection
- switch
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
Landscapes
- Switch Cases, Indication, And Locking (AREA)
Abstract
The invention relates to a method for preventing poor contact of a high-voltage switch. The method comprises the steps as follows: (I) a stainless steel protective band with a self-lock device at one end is adopted; (II) the width and the outer side perimeter of a switch spring are measured, the width of the protective band is equal to that of the spring and the length of the protective band is greater than that of the spring; and (III) the protective band coats the outer side of the spring, the spring hoops the periphery of a switch contact and at least three fixing holes are evenly punched on the protective band; one fixing clip is riveted on the protective band by using one riveting gun; the fixing clip is clamped between two contact fingers of the switch and the spring is clamped by using clamping strips; the protective band is locked and fixed by using a wire tightener; and the protective band is fastened to the outer side of the spring by using the fixing clip, the clamping strips are clamped at two sides of the protective band and the spring, rivets are inserted into a through hole of the fixing clip and the fixing holes of the protective band, and the rivets, the fixing clip and the protective band are fastened together by using double riveting guns. The method for preventing the poor contact of the high-voltage switch, discharge caused by the poor contact of the high-voltage switch of a power system can be avoided.
Description
Technical field
The present invention relates to a kind of method for preventing high-voltage switch contact loose contact.
Background technology
In recent years, applicant's generation more than ten plays the short trouble that 10KV switch cubicle Mume flower contact scaling loss is caused：Seven step-downs
Stand, six let-down stations, frequency is more, well damage, and do not imitate the precautionary measures, this kind of accident is in the same frequency of power system industry
Numerous generation.The existing prevention method taken is a kind of to shorten the time between overhauls(TBO), and one kind is to adopt infrared thermometry；But for the former
The live operation equipment of speech cannot the normal interruption maintenances of Jing, so be not suitable for most of equipment, and overhauled rear switching on/off handcart and pushed
Contact condition afterwards times cannot so be detected and cause possible hidden danger to eliminate；And the latter is because the position of switch contact is in cabin
It is interior, infrared thermometry cannot effective detection arrive.In the accident case of the step-down 10KV switch cubicles of applicant 2015 seven, ten minutes it
Front infrared thermometry is still normal value, and the accident of the serious scaling loss of switch contact just occurs afterwards.Therefore visible infrared ray thermometric is used
Cannot meet in the detection of the loose contact of switch contact.Switchgear is the most key equipment of power system, its fortune
Capable security is most important to stablizing for system, and it is first class of protection thereon that the scaling loss short trouble of switch contact causes
Action, that is, directly result in large area dead electricity, and its scaling loss degree is serious, and recovery time is long, has a strong impact on impact power system fortune
Row safety, belongs to major hidden danger, and does not imitate the precautionary measures, becomes the difficult problems for perplexing power industry in recent years.Switch cubicle is touched
Head simply compresses fingertip with two coil springs, there is the possibility of fingertip loose contact, causes contact resistance overheated, and spring pressure becomes
It is little, cause spring to follow the string, contact resistance becomes larger, fingertip fusing, causes phase fault to cause failure.
The content of the invention
In order to overcome the existing method for preventing high-voltage switch contact loose contact not enough, the present invention provides one kind and avoids power system
High-voltage switch gear because contact it is bad caused by electric discharge, arcing, cause switch blast, busbar short-circuit serious accident to prevent high pressure
The method of switch contact loose contact.
The major hidden danger of Operation of Electric Systems safety is directly affected for this, the present invention is to use stainless silicon steel material
Peripheral protection band；Protection band is wrapped in spring outwards, the uniform perforating at protection band correspondence spring gapping interval, installs fixing card
Son；It is accurately positioned after size and is locked.
Originally prevent high-voltage switch contact loose contact method include it is following successively the step of：
The I peripheral protection band for using stainless steel, usually 304 stainless steels.Magnetism-free stainless steel have remove magnetic property,
And do not deform because of heating, denaturation, stable performance disclosure satisfy that the use environment in switch cubicle.
The one of protection band is auspicious with self-locking device, and self-locking device has a ball tongue, and the one of ball tongue auspicious has stopper gear master
Steel ball, steel ball is arranged between ball tongue and stainless steel band, there is steel band tail insertion seam between the two, and steel band tail insertion seam is more than
The thickness of stainless steel band is less than ball diameter.The other end of protection band is inserted after the steel band tail insertion seam of self-locking device, outwards
One draws, and ball blocks stainless steel band, just stainless steel band self-locking.
Width, the lateral perimeter of II measurement switch spring, protection band is equal with the width of spring, and error is ± 2mm；Protect
Length of the length of protecting band more than spring；It is easy to protection band to wrap in the outside of spring.
III protection band is wrapped in spring outwards, and spring band corresponds to switch contact in the periphery of switch contact in protection band
Three fixing holes are at least uniformly made a call at gapping interval；
A riveting guns are by a fixing card riveting in protection band；
B is positioned, and the fixing card is placed between two fingertips of switch, and the card article of fixing card is blocked into spring；
C is locked using turnbuckle to protection band；
Protection band is fastened on spring outwards by d using fixing card, and the card article of fixing card both sides is stuck in the two of protection band and spring
Side, the fixing hole of double through holes and protection band for riveting gun injecting rivet remaining fixing card, with it is double riveting gun rivet and
Fixing card and protection band tighten together.
Using the protection band with self-locking device, protection band is locked using turnbuckle.
Switch contact is divided into A, B, C three-phase, and per being mutually divided into upper and lower two groups again, each contact adds two protection bands, up and down
Two groups of three-phases totally six contacts, i.e., need to add the protection that 12 protection bands implement contacts and spring fastening per face switch cubicle.
Beneficial effects of the present invention
Switch cabinet contact scaling loss be short-circuited failure when, itself switch cannot action, need to be by upper level protection act, applicant
The switch contact short troubles of seven step-down 10KV branches cause incoming relay-protection action to trip, one section of bus dead electricity it is serious after
Really, the switch contact scaling loss short trouble of six step-down 10KV branches causes one or two switch trips of main transformer, causes large area dead electricity
And the huge fluctuation of system, have influence on the production of applicant.Originally the method for preventing high-voltage switch contact loose contact, increases and protects
Protecting band, it can be ensured that contact is good, it is to avoid the generation of similar accident.
Description of the drawings
Fig. 1 is the outline drawing of the steel disc for making fixing card.
Fig. 2 is the front view of fixing card.
Fig. 3 is the sectional view of A-A lines along Fig. 2.
Fig. 4 is the expansion front view of protection band.
Fig. 5 is the partial sectional view of B-B lines along Fig. 4.
Fig. 6 is the schematic diagram that protection band is rolled in spring.
In above-mentioned figure
1. fixing card, 2. card article, 3. through hole, 4. protection band, 5. self-locking device, 6. ball tongue, 7. stainless steel band,
8. fixing hole, 9. steel ball, 10. steel band tail insertion seam, 11. switch contacts, 12. springs, 13. rivets.
Specific embodiment
The specific embodiment of the present invention is further illustrated with reference to embodiment and its accompanying drawing.For the following examples
Illustrate to contribute to understanding the present invention, but be not limitation of the present invention.
Embodiment
Originally prevent high-voltage switch contact loose contact embodiment of the method include it is following successively the step of：
The I peripheral protection band 4 for using stainless steel, the present embodiment is 304 stainless steels.Magnetism-free stainless steel has degaussing
Performance, and do not deform because of heating, denaturation, stable performance disclosure satisfy that the use environment in switch cubicle.
The one of protection band 4 is auspicious with self-locking device 5, sees Fig. 4 and Fig. 5, and self-locking device 5 has ball tongue 6, ball tongue 6
One it is auspicious have stopper to keep off main steel ball 9, steel ball 9 is arranged between ball tongue 6 and stainless steel band 7, has steel band tail to insert between the two
Enter seam 10, steel band tail insertion seam 10 is less than the diameter of ball 9 more than the thickness of stainless steel band 7.The other end of protection band 4 is inserted from
After the steel band tail insertion seam 10 of locking device 5, outside one draws, and ball 9 blocks stainless steel band 7, just the self-locking of stainless steel band 7.
II measurement switch spring width be 12mm, lateral perimeter be 370mm（Rated current 2500 is pacified）, protection band 4
Equal with the width of spring 12, error is ± 2mm.The length of protection band 4 more than spring 12 length, be 600mm, than spring outside
Long 230mm is enclosed,；It is easy to protection band 4 to wrap in the outside of spring 12.
For ease of operation, the length of protection band 4 is more than the 50% of the length of spring 12.Protection band（4）Correspondence switch contact（11）
At gapping interval.
III is fixed with clamp, fixing hole 8 is uniformly beaten at the correspondence gapping interval of switch contact 11 of protection band 4, using riveting
Nail gun installs fixing card 1.Protection band 4 is wrapped in the outside of spring 12, and spring 12 is bound round in the periphery of switch contact 11, sees Fig. 6, is being protected
Fixing hole 8 is uniformly beaten at the correspondence gapping interval of switch contact 11 of protecting band 4, the present embodiment is four fixing cards 1, totally four fixing holes
8, diameter Ф 2.5 mm；
Firstth, with riveting gun by a fixing card 1（Also serve as first fixing card）Riveting is in protection band 4.
Secondth, position, the fixing card 1 is placed between two fingertips of switch, and card article 2 is blocked into spring 12.
3rd, protection band 4 is locked using turnbuckle.
4th, protection band 4 is fastened on into the outside of spring 12, the card article 2 of the both sides of fixing card 1 using other three fixing cards 1
It is stuck in the both sides of protection band 4 and spring 12, double through holes 3 and the fixing hole of protection band 4 for riveting gun injecting rivet 13 fixing card 1
8, riveting gun tightens together three fixing cards 1 of rivet 13 and other and protection band 4 with double.
The present embodiment is with four rivets 13 and four fixing cards 1.
The shape of fixing card 1 is shown in Fig. 1, Fig. 2 and Fig. 3.The square of the overlook direction of the fixing card 1 of the present embodiment, also may be used
With with rectangle.Respectively there is a card article 2 in the both sides of fixing card 1, card article 2 is vertical with mainboard 1.1., has through hole 3 in mainboard 1.1.
Using the protection band 4 with self-locking device 6, in positioning（Between any two fingertip）After size, using turnbuckle pair
Protection band 4 is locked.
Switch contact is divided into A, B, C three-phase, and per being mutually divided into upper and lower two groups again, each contact adds two protection bands 4, up and down
Two groups of three-phases totally six contacts, i.e., need to add the protection that 12 protection bands 4 implement contacts and spring fastening per face switch cubicle.
Claims (3)
1. a kind of method for preventing high-voltage switch contact loose contact, it include it is following successively the step of：
The I peripheral protection band for using stainless steel（4）, protection band（4）It is one auspicious with self-locking device（5）, self-locking device
（5）There is ball tongue（6）, ball tongue（6）One auspicious have stopper to keep off main steel ball（9）, steel ball（9）Installed in ball tongue（6）
With stainless steel band（7）Between, there is steel band tail insertion seam between the two（10）, steel band tail insertion seam（10）More than stainless steel band（7）
Thickness be less than ball（9）Diameter；
II measurement switch spring（12）Width, lateral perimeter, protection band（4）With spring（12）Width it is equal, error is
±2mm；Protection band（4）Length be more than spring（12）Length；
III protection band（4）Wrap in spring（12）Outside, spring（12）Hoop is in switch contact（11）Periphery, in protection band
（4）Correspondence switch contact（11）Three fixing holes are at least uniformly made a call at gapping interval（8）；
A riveting guns are by a fixing card（1）Riveting is in protection band（4）On；
B is positioned, by the fixing card（1）It is placed between two fingertips of switch, and by the card article of fixing card（2）Block spring（12）；
C is using turnbuckle to protection band（4）It is locked；
D utilizes fixing card（1）By protection band（4）It is fastened on spring（12）Outside, fixing card（1）The card article of both sides（2）It is stuck in
Protection band（4）And spring（12）Both sides, it is double riveting gun rivet（13）Inject remaining fixing card（1）Through hole（3）And protect
Protecting band（4）Fixing hole（8）, use pair is riveting gun rivet（13）With fixing card（1）And protection band（4）Tighten together.
2. the method for preventing high-voltage switch contact loose contact according to claim 1, is characterized in that：
Described protection band（4）Material be 304 stainless steels.
3., according to the arbitrary described method for preventing high-voltage switch contact loose contact of claim 1 or 2, it is characterized in that：
Switch contact is divided into A, B, C three-phase, is divided into upper and lower two groups again per phase, each contact（11）Add two protection bands（4）, on
Lower two groups of three-phases totally six contacts, per face switch cubicle 12 protection bands need to be added（4）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611122227.9A CN106653411B (en) | 2016-12-08 | 2016-12-08 | A method of preventing high-voltage switch contact poor contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611122227.9A CN106653411B (en) | 2016-12-08 | 2016-12-08 | A method of preventing high-voltage switch contact poor contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106653411A true CN106653411A (en) | 2017-05-10 |
| CN106653411B CN106653411B (en) | 2018-08-17 |
Family
ID=58819766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611122227.9A Active CN106653411B (en) | 2016-12-08 | 2016-12-08 | A method of preventing high-voltage switch contact poor contact |
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| Country | Link |
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| CN (1) | CN106653411B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054107U (en) * | 1989-04-21 | 1990-03-07 | 向军 | Monodirectional auto-locking positioning device |
| CN201780885U (en) * | 2009-12-02 | 2011-03-30 | 慈溪市和昌电器有限公司 | Bundled contact short-circuit preventive safety sheath |
| CN103198962A (en) * | 2013-04-01 | 2013-07-10 | 甘肃省电力公司检修公司 | Moving contact of 330kV isolating switch of converting station |
| CN203950770U (en) * | 2013-12-02 | 2014-11-19 | 国家电网公司 | Insulating enclosed type fuse fastening assembly |
| CN203950776U (en) * | 2013-12-02 | 2014-11-19 | 国家电网公司 | J type hook hole insulating enclosed type fuse fastening assembly |
-
2016
- 2016-12-08 CN CN201611122227.9A patent/CN106653411B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054107U (en) * | 1989-04-21 | 1990-03-07 | 向军 | Monodirectional auto-locking positioning device |
| CN201780885U (en) * | 2009-12-02 | 2011-03-30 | 慈溪市和昌电器有限公司 | Bundled contact short-circuit preventive safety sheath |
| CN103198962A (en) * | 2013-04-01 | 2013-07-10 | 甘肃省电力公司检修公司 | Moving contact of 330kV isolating switch of converting station |
| CN203950770U (en) * | 2013-12-02 | 2014-11-19 | 国家电网公司 | Insulating enclosed type fuse fastening assembly |
| CN203950776U (en) * | 2013-12-02 | 2014-11-19 | 国家电网公司 | J type hook hole insulating enclosed type fuse fastening assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106653411B (en) | 2018-08-17 |
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