CN107727291B - A kind of switchgear plum blossom contact finger pressure testing device - Google Patents
A kind of switchgear plum blossom contact finger pressure testing device Download PDFInfo
- Publication number
- CN107727291B CN107727291B CN201710919550.7A CN201710919550A CN107727291B CN 107727291 B CN107727291 B CN 107727291B CN 201710919550 A CN201710919550 A CN 201710919550A CN 107727291 B CN107727291 B CN 107727291B
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- China
- Prior art keywords
- reed
- pressure
- plum blossom
- contact finger
- testing device
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0038—Force sensors associated with force applying means applying a pushing force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0057—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to spring-shaped elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
Abstract
The invention discloses a kind of switchgear plum blossom contact finger pressure testing devices, it is related to electric power apparatus examination detection field, including pitman, plug, the plug front setting limit guidance part is arranged in the connection nose, insulating sleeve is arranged in rear portion, the multiple independent arc-shaped conductive reeds mutually of insulating sleeve annular setting, the multiple arc-shaped reed form cavity, and pressure bladder is arranged in the cavity inside, the pressure bladder connects pressure gauge, and the reed connects ammeter.The present invention solves the problems, such as that prior art measurement effect is bad and means are single.
Description
Technical field
The present invention relates to electric power apparatus examination detection fields, detect and fill more particularly, to a kind of switchgear plum blossom sensing finger pressure
It sets.
Background technique
Electric system high-voltage switch equipment is one of the critical component for guaranteeing electrical power trans mission/distribution system safe and reliable operation.High pressure
Switchgear is related to the stability of electric system whether normal work, thereby, it is ensured that high-tension switch gear reliability service is especially heavy
It wants.
In switchgear During Process of Long-term Operation, the contact pressure of the dynamic/static contact of switchgear is to influence its current-carrying performance
Important parameter, but it can't effectively be measured at present.Dynamic/static contact position in switchgear would generally be because of connecing
Touch pressure decline causes contact resistance to become larger, and causes major loop temperature anomaly.If failing this variation of timely learning, after reforwarding
Row, then can be further exacerbated by fever and oxidation, and generate vicious circle, and occur such as fingertip fusing fall off, contact burn with
And phenomena such as adjacent insulating material deterioration, it finally even can be on fire, accident occurs, seriously even causes to puncture, explode etc. to dislike
Sexual behavior event.
The moving contact of high-tension switch gear is usually cluster contact, and also referred to as Mume flower contact, fingertip is to static contact
Pressure be that the spring being banded in above fingertip generates.If spring partly or wholly lost its bounce, sound touching will result in
Pressure decline between head, and then cause accident.
The mechanical property of common spring is characterized with rigidity, and due to the special ring structure of spring touch finger, needing will be to general
The examination of logical spring rate is converted into the examination to spring touch finger radial pressure (or ess-strain), this index is directly concerning arriving
Connection reliability in terms of high-voltage switch gear and mechano-electronic.When spring touch finger is selected, mostly at present is rule of thumb to hold to survey
Power, there are great errors, while also taking time and effort, and can not meet the requirement of industrialized production.
Currently, most of service personnel judges that the foundation of dynamic/static contact conductive portions contact quality is exactly loop resistance
Size whether be more than the given threshold value of product technology list.However the loop resistance value provided in product technology list is entire
The permitted maximum resistance value in galvanic circle, it includes the body electricity of the parts such as connecting terminal, moving contact, contact arm, vacuum interrupter
Resistance and contact resistance, the range being related to is compared with wide, institute's reserved margin is larger, it is virtually impossible to directly reflect the variation of contact resistance.
More have article to point out: " actual experiment proves: 2 pairs of fingertips and 4 pairs of fingertips, and loop resistance only poor several micro-ohms are said in product
In the given acceptability limit of bright book.Equally, if the contact pressure of fingertip is dropped to 20N by 120N, total loop resistance value is basic
Do not change, still in acceptability limit." if in maintenance, only the spring of obvious failure and fracture is replaced in attention, and to those
The spring that elastic force reduces, since loop resistance variation still can be in acceptability limit, it is thus regarded that these have begun the bullet of failure
Spring is still in good condition, and without carrying out replacement words to it, in this way after equipment puts into operation again, contact system is born electronic
Repulsion can be such that the pressure between local dynamic/static contact declines；The distribution of still further aspect, each fingertip electric current also can be because of pressure difference
It is different and different.After longtime running, it will be in contact bad and overheat, in turn result in accident.
102253336 B of Chinese patent Authorization Notice No. CN discloses a kind of high-voltage isolating switch sensing finger pressure test dress
It sets comprising tong-like test contact, hydraulic cylinder, pressure gauge, micro hydraulic station, solenoid directional control valve and travel switch；Tong-like test
The fixing end rear end of contact is fixed on hydraulic cylinder body, and movable end rear inside is fixed on the piston rod of hydraulic cylinder, activity
When holding opening angle maximum, withstood on travel switch on the outside of movable end contact end or rear end, two oil pockets of hydraulic cylinder respectively by
Pressurization oil pipe and pressure release oil pipe are connected on micro hydraulic station by solenoid directional control valve；Pressure is installed on the pressurization oil pipe of hydraulic cylinder
Power table.The inventive structure is simple, easy to use, small in size, light-weight, easy to carry, and accuracy is high.It can testing high voltage every
Leave and close fingertip grip force, hold with a firm grip the generation of hypodynamic phenomenon to solve high voltage isolator fingertip in advance, avoid because every
Leave the generation of high voltage isolation switch contact heating problem caused by closing fingertip grip force deficiency.But the judgement spring touch finger is
The measuring tool of no qualification is only capable of measuring the pressure of opposite contact simultaneously in measurement process, can not reverse spring fingertip reality
Border operating condition cannot function as the effective means of fingertip products radial pressure detecting.
Summary of the invention
In view of this, in view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of switchgear plum blossom sensing finger pressures
Detection device solves the problems, such as that prior art measurement effect is bad and means are single.
In order to achieve the above objectives, the invention adopts the following technical scheme:
A kind of switchgear plum blossom contact finger pressure testing device, including pitman, plug is arranged in the connection nose, described
Insulating sleeve, the multiple independent circles mutually of insulating sleeve annular setting are arranged in plug front setting limit guidance part, rear portion
Arcuation conductive reed, the multiple arc-shaped reed form cavity, and pressure bladder, the pressure bladder connection is arranged in the cavity inside
Pressure gauge.
Further, the pressure bladder is 1 or more, is separated between pressure bladder by spacing board.
Further, circular arc chamfering is arranged in the reed edge.
Further, the reed and insulating sleeve are hinged.
Further, the reed is fixedly connected with insulating sleeve.
Further, each reed individually connects ammeter.
The beneficial effects of the present invention are:
The present invention includes pitman, and plug, the plug front setting limit guidance part, institute is arranged in the connection nose
Plug rear portion setting insulating sleeve is stated, the multiple independent arc-shaped conductive reeds mutually of insulating sleeve annular setting are described
Reed connects ammeter.The ammeters measurement being connect with reed by multiple, can be accurately judged to the reed in which direction with
Fingertip poor contact makes service personnel targetedly repair or replace, and effectively avoids due to slight oxidation or arc light burning
Ruin the more severe accident for causing the later period.
The multiple arc-shaped reed forms cavity, and pressure bladder is arranged in the cavity inside, and the pressure bladder connects pressure
Table.The working condition that fingertip and fastening spring can be effectively judged by pressure, provides reference frame for service work, prevents
The equipment as caused by artificial error in judgement is in bad repair.
More importantly the pressure bladder is set as multiple, pass through the pressure change of pressure bladder, so that it may obtain whole
The working condition for covering plum blossom fingertip, cooperates each pressure bladder to correspond to the resistance value of reed, more clearly show that there are failures
Place and type effectively reduce the workload of service personnel；In addition, separated between the pressure bladder by spacing board, point
It is independent mutually to separate each pressure bladder come, is independent of each other, further improves the authenticity of data.
Circular arc chamfering is arranged in the reed edge, and circular arc chamfering can hurt pressure bladder to avoid reed, increases equipment
Service life and safety.
Detailed description of the invention
Fig. 1 is implementation status diagram of the invention.
Fig. 2 is the diagrammatic cross-section of the embodiment of the present invention one.
Fig. 3 is the detection device sectional schematic diagram of the embodiment of the present invention one.
Fig. 4 is the diagrammatic cross-section of the embodiment of the present invention two.
Fig. 5 is the detection device sectional schematic diagram of the embodiment of the present invention two.
In figure: 1- spring, 2- fingertip, 3- limit guidance part, 4- reed, 5- insulating sleeve, 6- plug, 7- pitman, 8-
Pressure bladder, 9- spacing board.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1
As illustrated in fig. 1 and 2, a kind of switchgear plum blossom contact finger pressure testing device, including pitman 7, before the pitman 7
End setting plug 6,6 front of the plug setting limit guidance part 3, insulating sleeve 5, the insulation is arranged in 6 rear portion of plug
The multiple independent arc-shaped conductive reeds 4 mutually of 5 annular setting of sleeve, the reed 4 connect ammeter.Pass through multiple and reed
The ammeter measurement of 4 connections, can be accurately judged to reed 4 and 2 poor contact of fingertip in which direction, service personnel is made to have needle
Maintenance or replacement to property effectively avoid and cause the more severe accident in later period since slight oxidation or arc light are burnt.
As shown in figure 3, the multiple arc-shaped reed 4 forms cavity, pressure bladder 8, the pressure is arranged in the cavity inside
Power capsule 8 connects pressure gauge.Transmission medium in pressure bladder 8 uses the biggish hydraulic oil of density, is supplied by hydraulic pump to pressure bladder 8
Oil provides pressure, and the working condition of fingertip 2 and fastening spring 1 can be effectively judged by hydraulic fluid pressure, is service work
Reference frame is provided, it is in bad repair to prevent the equipment as caused by artificial error in judgement.
The guiding limiting section 3 is goed deep into 4 front end of reed, and reed 4 is prevented to be opened by pressure bladder 8.Since reed 4 also needs
It wants conductive, in order to reduce resistance, is generally made of fine copper, but fine copper sheet metal lacks flexibility, in order to make reed 4 with resultant pressure
Capsule 8 changes, and the reed 4 and insulating sleeve 5 are hinged.
The present apparatus when in use, first passes through valve and releases stress intraluminal pressure, retract into contact convenient for reed；Then
Pressurising test records data, as a result, releasing stress later, the taking-up present apparatus completes this test for analysis.
Embodiment 2
The present embodiment is similar to 1 primary structure of embodiment, and difference is: as shown in figure 5, the pressure bladder 8 is arranged
To be multiple, pass through the pressure change of pressure bladder 8, so that it may obtain the working condition of a whole set of plum blossom fingertip 2；The each pressure of the present apparatus
Pipeline and valve is separately provided in capsule 8, passes through unified hydraulic device fuel feeding and oil return；Cooperate the corresponding reed 4 of each pressure bladder 8
Resistance value more clearly obtains the workload that service personnel is effectively reduced there are the place of failure and type；In addition,
Separated between the pressure bladder 8 by spacing board 9, the spacing board 9 is guaranteed when under pressure using the hard material of insulation
Indeformable, each pressure bladder 8 separated is independent mutually, is independent of each other, and being also possible to prevent spacing board touching reed influences number
According to acquisition, the authenticity of data is further improved.
Circular arc chamfering is arranged in 4 edge of reed, and circular arc chamfering can hurt pressure bladder 8 to avoid reed 4, and increase is set
Standby service life and safety.
As shown in figure 4, the reed 4 can also use spring steel, guarantee its shape, institute using the elasticity of spring steel itself
It states reed 4 to be fixedly connected with insulating sleeve 5, to reduce resistance, the reed 4 can plate the material for applying and reducing resistance, such as silver-plated place
Reason.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical solution of the present invention, without departing from technical solution of the present invention
Spirit and scope, be intended to be within the scope of the claims of the invention.
Claims (5)
1. a kind of switchgear plum blossom contact finger pressure testing device, it is characterised in that: including pitman, the connection nose setting
Insulating sleeve is arranged in plug, the plug front setting limit guidance part, rear portion, and the insulating sleeve annular setting is multiple mutually
Independent arc-shaped conductive reed, the multiple arc-shaped reed form cavity, and pressure bladder, the pressure is arranged in the cavity inside
Power capsule connects pressure gauge, and the pressure bladder is identical as conductive reed number, is separated between pressure bladder by spacing board.
2. a kind of switchgear plum blossom contact finger pressure testing device according to claim 1, it is characterised in that: the reed
Circular arc chamfering is arranged in edge.
3. a kind of switchgear plum blossom contact finger pressure testing device according to claim 1, it is characterised in that: the reed
It is hinged with insulating sleeve.
4. a kind of switchgear plum blossom contact finger pressure testing device according to claim 1, it is characterised in that: the reed
It is fixedly connected with insulating sleeve.
5. a kind of switchgear plum blossom contact finger pressure testing device according to claim 1, it is characterised in that: described in each
Reed individually connects ammeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710919550.7A CN107727291B (en) | 2017-09-30 | 2017-09-30 | A kind of switchgear plum blossom contact finger pressure testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710919550.7A CN107727291B (en) | 2017-09-30 | 2017-09-30 | A kind of switchgear plum blossom contact finger pressure testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107727291A CN107727291A (en) | 2018-02-23 |
| CN107727291B true CN107727291B (en) | 2019-09-24 |
Family
ID=61209747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710919550.7A Active CN107727291B (en) | 2017-09-30 | 2017-09-30 | A kind of switchgear plum blossom contact finger pressure testing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN107727291B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341901A (en) * | 2018-10-29 | 2019-02-15 | 深圳市通意达机电设备有限公司 | Pressure detecting instrument |
| CN109900445A (en) * | 2019-03-29 | 2019-06-18 | 国网河南省电力公司电力科学研究院 | A kind of switchgear plum blossom fingertip holddown spring performance testing device |
| CN109974914A (en) * | 2019-04-17 | 2019-07-05 | 福州大学 | A kind of Mume flower contact distributed contact resistor pressure detection method and device |
| CN111487022B (en) * | 2020-04-27 | 2022-05-03 | 泰安市泰和电力设备有限公司 | Elasticity measurement equipment and method for contact spring |
| CN112684254A (en) * | 2020-11-26 | 2021-04-20 | 广西电网有限责任公司桂林供电局 | Conductive loop detection device and data return method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201548358U (en) * | 2009-09-17 | 2010-08-11 | 江苏省电力公司连云港供电公司 | Contact finger pressure testing device |
| CN102954849A (en) * | 2012-11-09 | 2013-03-06 | 厦门Abb开关有限公司 | Device and method for measuring pressure of inner contact finger in moving contact of high-voltage switchgear |
| CN105342603A (en) * | 2014-11-19 | 2016-02-24 | 群蕴科技股份有限公司 | Inflatable brain wave measuring device |
| CN205138770U (en) * | 2015-10-30 | 2016-04-06 | 中国西电电气股份有限公司 | Coil spring touches and indicates radial pressure measuring device |
| CN205426401U (en) * | 2015-12-09 | 2016-08-03 | 中国西电电气股份有限公司 | Power testing arrangement is held tightly to self -elastic contact class part |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1090091A (en) * | 1996-09-13 | 1998-04-10 | Toshio Kobayashi | Measuring instrument for tensile state of hair |
-
2017
- 2017-09-30 CN CN201710919550.7A patent/CN107727291B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201548358U (en) * | 2009-09-17 | 2010-08-11 | 江苏省电力公司连云港供电公司 | Contact finger pressure testing device |
| CN102954849A (en) * | 2012-11-09 | 2013-03-06 | 厦门Abb开关有限公司 | Device and method for measuring pressure of inner contact finger in moving contact of high-voltage switchgear |
| CN105342603A (en) * | 2014-11-19 | 2016-02-24 | 群蕴科技股份有限公司 | Inflatable brain wave measuring device |
| CN205138770U (en) * | 2015-10-30 | 2016-04-06 | 中国西电电气股份有限公司 | Coil spring touches and indicates radial pressure measuring device |
| CN205426401U (en) * | 2015-12-09 | 2016-08-03 | 中国西电电气股份有限公司 | Power testing arrangement is held tightly to self -elastic contact class part |
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| Publication number | Publication date |
|---|---|
| CN107727291A (en) | 2018-02-23 |
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