CN105806211A - Breaker contact engagement depth measuring device reasonable in structure and precise in measurement - Google Patents

Breaker contact engagement depth measuring device reasonable in structure and precise in measurement Download PDF

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Publication number
CN105806211A
CN105806211A CN201610163418.3A CN201610163418A CN105806211A CN 105806211 A CN105806211 A CN 105806211A CN 201610163418 A CN201610163418 A CN 201610163418A CN 105806211 A CN105806211 A CN 105806211A
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CN
China
Prior art keywords
handcart
measurement
displacement
contact
static contact
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.)
Withdrawn
Application number
CN201610163418.3A
Other languages
Chinese (zh)
Inventor
江陈桢
陆志辉
朱富云
陆佳南
倪红军
汪兴兴
丁然
曹新
茅雷
陈宇
王鹏
蒯晓东
钱聪
黄金鑫
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.)
NANTONG POWER SUPPLY COMPANY JIANGSU ELECTRIC POWER Co Ltd
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Original Assignee
NANTONG POWER SUPPLY COMPANY JIANGSU ELECTRIC POWER Co Ltd
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NANTONG POWER SUPPLY COMPANY JIANGSU ELECTRIC POWER Co Ltd, State Grid Corp of China SGCC, State Grid Jiangsu Electric Power Co Ltd filed Critical NANTONG POWER SUPPLY COMPANY JIANGSU ELECTRIC POWER Co Ltd
Priority to CN201610163418.3A priority Critical patent/CN105806211A/en
Priority to CN201410341258.8A priority patent/CN104111028A/en
Publication of CN105806211A publication Critical patent/CN105806211A/en
Withdrawn legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic means
    • G01B7/26Measuring arrangements characterised by the use of electric or magnetic means for measuring depth

Abstract

The invention discloses a breaker contact engagement depth measuring device reasonable in structure and precise in measurement.The device comprises six sets of displacement sensors which are mounted in counterbores in six moving contacts of the phase A, the phase B and the phase C of a handcart type breaker of a high-voltage switch cabinet respectively.A power line and a signal line are guided out of a circumferential gap of a tulip contact and are guided out of the high-voltage switch cabinet through the space of the handcart type breaker to be connected with a data processing device.The data processing device is connected with a display device.The device is reasonable in structure, and measurement is convenient and accurate.

Description

The contact of breaker depth of engagement measurement apparatus of measurement rational in infrastructure, accurate
The application is the divisional application of application number 201410341258.8, applying date 2014.7.18, title " closing armouring high-voltage switch cubicle handcart formula contact of breaker depth of engagement measurement apparatus ".
Technical field
The present invention relates to a kind of closing armouring high-voltage switch cubicle handcart formula contact of breaker depth of engagement measurement apparatus.
Background technology
High-tension switch cabinet refers to for playing the effects such as break-make, control or protection in power system generating, transmission of electricity, distribution, electric energy conversion and consumption; high-tension switch cabinet is by making the electric pressure electric equipment products at 3.6kV ~ 550kV; high voltage isolator and earthed switch, high voltage load switch, high pressure automatic reclosing and sectionaliser, several big classes such as high-voltage actuating mechanism, high-voltage explosion-proof power distribution equipment and high-tension switch cabinet.
High-tension switch cabinet has the functions such as built on stilts line, cable incoming-outgoing wire, bus contact.It is primarily adapted for use in various different fields such as power plant, transformer station, petrochemical industry, metallurgical steel rolling, industry light industry textile industry, industrial enterprise and residential quarters, skyscraper etc..
High-tension switch cabinet should meet ac metal closing switch gear, and " the relevant requirement of standard, is made up of cabinet and chopper two major part, and cabinet is made up of housing, electric elements (including insulating part), various mechanism, secondary terminals and line etc..
High-tension switch cabinet is divided into withdraw-type (handcart-type) and fixed by chopper mounting means;It is divided into indoor and outdoor by infield;Metal enclosed armoured switch cabinet, the metal enclosed box switch cubicle of metal enclosed spaced switch cabinet and the big class of open type switch cubicle four can be divided into by cabinet body structure.
Armored indoor, metal enclosed, high-tension switch cabinet with handcart type breaker, be commonly referred to armoured removable type alternating (hereinafter referred to as switch cubicle), and its common voltage grade includes 10kV, 20kV, 35kV etc..It is mainly used in power plant, transformer station, medium and small generator power transmission, industrial and mineral enterprises and institutions distribution and Large-scale High-Pressure motor starting etc..For accepting and distribute electric energy, and circuit is carried out control, protection and monitoring.
Switch cubicle is by the cabinet fixed and can remove parts (handcart) two large divisions and forms.Can removing parts (handcart) to be made up of chassis and breaker body, propulsive mechanism is arranged on inside chassis.Two sides, chassis are respectively equipped with 2 wheels, built-in needle bearing so that handcart is light and flexible when advancing, pulling out.Handcart is divided into circuit breaker cart, isolation handcart, voltage mutual inducer trolley, earth handcart etc..According to the function of electrical equipment in cabinet, cabinet dividing plate is divided into four different functional units, including: breaker chamber, bus-bar room, cable vault and control room.Dividing plate between shell and each functional unit of cabinet all adopts the bending of aluminizing zine plate to form.The static contact of chopper is installed in the cabinet side that breaker chamber is fixing, parts (handcart) side can be removed the moving contact of breaker (Mume flower contact) of pairing is installed, the breaker chamber portion closed it is to occur at, it is impossible to the depth of engagement of both direct vision during the two engagement.
High-tension switch cabinet operates, and wheelbarrow switch moves to operating position, hand wheelbarrow switch from testing position, and moving contact starts counting up when entering static contact, until shaking this LAP to operating position, is engagement (insertion) degree of depth of dynamic/static contact.
Having to check for the depth of engagement of handcart type breaker dynamic/static contact after switch cubicle is newly installed, the depth of engagement of 10kV~35kV handcart type breaker dynamic/static contact is 15~30mm, and measurement size must be extremely accurate to grade.Traditional measuring method is: be coated with a small amount of vaseline on static contact, handcart is pushed into run location, then is pulled out by handcart outside cabinet, stays the impression on static contact when then measuring the engagement of handcart dynamic/static contact.Wheelbarrow switch, the hand process to operating position be can't see, hands also touch less than, this original measurement method can only be adopted, sized data error is very big, especially in summer high-temperature season, when temperature is more than 35 DEG C, vaseline liquefaction, does not see impression, even without impression, check and accept to in-site measurement and bring very big difficulty, it is impossible to ensure accurate, the reliable contacts (must under bus bar side and feeder line side power-off condition) of handcart type breaker dynamic/static contact, and easily make mistakes.
Summary of the invention
It is an object of the invention to provide a kind of rational in infrastructure, measure conveniently, close armouring high-voltage switch cubicle handcart formula contact of breaker depth of engagement measurement apparatus accurately.
The technical solution of the present invention is:
A kind of closing armouring high-voltage switch cubicle handcart formula contact of breaker depth of engagement measurement apparatus, it is characterized in that: include six set displacement transducers, six set displacement transducers are loaded in the internal counter sink of 6 moving contacts of A, B, C three-phase of high-voltage switch cubicle handcart formula chopper respectively, power line and holding wire are drawn in the space, border of moving contact, and draw high-tension switch cabinet through the space of handcart type breaker, being connected with data processing equipment, data processing equipment is connected to man machine interface display module;Displacement transducer selects contact or guiding back springing type displacement transducer, transducer range is chosen as 10mm ~ 100mm, sensor accuracy is chosen as 0.1% ~ 1%, and sensor power power supply selects direct current 5V, 10V, 12V or 24V electric pressure, and the output of displacement transducer is chosen as voltage 0 ~ 5V or 0 ~ 10V;Or the output of displacement transducer is chosen as current signal 0 ~ 10mA, 0 ~ 20mA or 4 ~ 20mA;
When after handcart type breaker push-on switch cabinet, moving contact starts counting up when entering static contact, namely the push rod top of displacement transducer to static contact time start counting up, until handcart moves to operating position, one section of displacement stroke can be produced, this LAP is the depth of engagement of dynamic/static contact, and this displacement stroke reads through sensor detection and output, data processing equipment and processes, and may finally directly display displacement stroke data in the man machine interface display module of this measurement apparatus;Determining whether the dynamic/static contact depth of engagement requirement reaching high-voltage switch cubicle handcart formula chopper through staff, if reaching requirement, handcart can be removed, remove this measurement apparatus, reset handcart operating position;If not reaching requirement, then requiring that staff removes handcart, increasing or reducing static contact as required and the quantity of pad is installed, then repeating above-mentioned work, till meeting requirement.
The invention provides a kind of metal enclosed armouring high-voltage switch cubicle handcart formula contact of breaker depth of engagement intelligent measuring device, " solving the problems such as the technique in in-site installation, debugging, measurement, examination is loaded down with trivial details, measurement difficulty greatly, is easily made mistakes, it is ensured that the precision of measurement, dynamic/static contact reliable contacts " will be had very great meaning.
The present invention program is reasonable, during use, displacement sensor module is arranged in the internal counter sink of moving contact (Mume flower contact) of high-voltage switch cubicle handcart formula chopper, ensure that displacement transducer push rod (pin) can synchronize to touch static contact with moving contact, power line and holding wire are drawn in the space, border of Mume flower contact, and draw high-tension switch cabinet through the space of handcart type breaker.When after handcart type breaker push-on switch cabinet, moving contact starts counting up when entering static contact, namely the push rod (pin) of displacement transducer starts counting up when pushing up to static contact, until handcart moves to operating position, one section of displacement stroke can be produced, this LAP is engagement (insertion) degree of depth of dynamic/static contact, and this displacement stroke can show in the man machine interface of this measurement apparatus.The accurate measurement of handcart type breaker dynamic/static contact engagement can be realized, convenient and reliable, the problems such as the measurement difficulty solving traditional measurement method is big, sized data error big, reliability is not high, accurately measure realizing the metal enclosed armouring high-voltage switch cubicle handcart formula contact of breaker depth of engagement, guarantee that dynamic/static contact reliable contacts has very great meaning.This measurement apparatus is finally measured and display precision is up to ± 0.1mm.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structural representation of one embodiment of the invention.
Detailed description of the invention
A kind of closing armouring high-voltage switch cubicle handcart formula contact of breaker depth of engagement measurement apparatus, including six set displacement transducers 1, six set displacement transducers are loaded in the internal counter sink of six moving contacts 6 of A, B, C three-phase of high-voltage switch cubicle handcart formula chopper respectively, power line and holding wire are drawn in the space, border of moving contact (Mume flower contact), and draw high-tension switch cabinet through the space of handcart type breaker, being connected with data processing equipment 2, data processing equipment is connected to display device (example man machine interface) 3.Figure also has supply unit 8.
Data processing equipment adopts the data handling equipment (such as forms such as data collecting cards) of existing maturation, and display device can select the forms such as digital quantity display instrument, PDA or direct display in a computer.
Displacement transducer selects contact, guiding back springing type displacement transducer, such as differential transformer displacement sensor, transducer range is chosen as 10mm ~ 100mm, sensor accuracy is chosen as 0.1% ~ 1%, sensor power power supply selects the conventional measurement apparatus electric pressures such as direct current 5V, 10V, 12V or 24V, and the output of displacement transducer is chosen as common voltage (0 ~ 5V or 0 ~ 10V) or conventional current signal (0 ~ 10mA, 0 ~ 20mA or 4 ~ 20mA).
Including six set displacement transducers, six set displacement transducers are loaded in the internal counter sink of 6 moving contacts of A, B, C three-phase of high-voltage switch cubicle handcart formula chopper respectively, power line and holding wire are drawn in the space, border of Mume flower contact, and draw high-tension switch cabinet through the space of handcart type breaker, being connected with data processing equipment, data processing equipment is connected to man machine interface display module;Displacement transducer selects contact or guiding back springing type displacement transducer, transducer range is chosen as 10mm ~ 100mm, sensor accuracy is chosen as 0.1% ~ 1%, and sensor power power supply selects direct current 5V, 10V, 12V or 24V electric pressure, and the output of displacement transducer is chosen as voltage 0 ~ 5V or 0 ~ 10V;Or the output of displacement transducer is chosen as current signal 0 ~ 10mA, 0 ~ 20mA or 4 ~ 20mA;
When after handcart type breaker 4 push-on switch cabinet 5, moving contact 6 starts counting up when entering static contact 7, namely the push rod top of displacement transducer to static contact time start counting up, until handcart moves to operating position, one section of displacement stroke can be produced, this LAP is the depth of engagement of dynamic/static contact, and this displacement stroke reads through sensor detection and output, data processing equipment and processes, and may finally directly display displacement stroke data in the man machine interface display module of this measurement apparatus;Determining whether the dynamic/static contact depth of engagement requirement reaching high-voltage switch cubicle handcart formula chopper through staff, if reaching requirement, handcart can be removed, remove this measurement apparatus, reset handcart operating position;If not reaching requirement, then requiring that staff removes handcart, increasing or reducing static contact as required and the quantity of pad is installed, then repeating above-mentioned work, till meeting requirement.

Claims (1)

1. the contact of breaker depth of engagement measurement apparatus of a measurement rational in infrastructure, accurate, it is characterized in that: include six set displacement transducers, six set displacement transducers are loaded in the internal counter sink of 6 moving contacts of A, B, C three-phase of high-voltage switch cubicle handcart formula chopper respectively, power line and holding wire are drawn in the space, border of moving contact, and draw high-tension switch cabinet through the space of handcart type breaker, being connected with data processing equipment, data processing equipment is connected to man machine interface display module;Displacement transducer selects contact or guiding back springing type displacement transducer, transducer range is chosen as 10mm ~ 100mm, sensor accuracy is chosen as 0.1% ~ 1%, and sensor power power supply selects direct current 5V, 10V, 12V or 24V electric pressure, and the output of displacement transducer is chosen as voltage 0 ~ 5V or 0 ~ 10V;Or the output of displacement transducer is chosen as current signal 0 ~ 10mA, 0 ~ 20mA or 4 ~ 20mA;Display device adopts PDA;Displacement transducer adopts differential transformer sensor;
When after handcart type breaker push-on switch cabinet, moving contact starts counting up when entering static contact, namely the push rod top of displacement transducer to static contact time start counting up, until handcart moves to operating position, one section of displacement stroke can be produced, this LAP is the depth of engagement of dynamic/static contact, and this displacement stroke reads through sensor detection and output, data processing equipment and processes, and may finally directly display displacement stroke data in the man machine interface display module of this measurement apparatus;Determining whether the dynamic/static contact depth of engagement requirement reaching high-voltage switch cubicle handcart formula chopper through staff, if reaching requirement, handcart can be removed, remove this measurement apparatus, reset handcart operating position;If not reaching requirement, then requiring that staff removes handcart, increasing or reducing static contact as required and the quantity of pad is installed, then repeating above-mentioned work, till meeting requirement.
CN201610163418.3A 2014-07-18 2014-07-18 Breaker contact engagement depth measuring device reasonable in structure and precise in measurement Withdrawn CN105806211A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201610163418.3A CN105806211A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring device reasonable in structure and precise in measurement
CN201410341258.8A CN104111028A (en) 2014-07-18 2014-07-18 Device for measuring meshing depth of contacts of handcart type circuit breaker of closed armored high-voltage switch cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610163418.3A CN105806211A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring device reasonable in structure and precise in measurement

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN201410341258.8A Division CN104111028A (en) 2014-07-18 2014-07-18 Device for measuring meshing depth of contacts of handcart type circuit breaker of closed armored high-voltage switch cabinet

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Publication Number Publication Date
CN105806211A true CN105806211A (en) 2016-07-27

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Family Applications (10)

Application Number Title Priority Date Filing Date
CN201410341258.8A Pending CN104111028A (en) 2014-07-18 2014-07-18 Device for measuring meshing depth of contacts of handcart type circuit breaker of closed armored high-voltage switch cabinet
CN201510419349.3A Pending CN105066874A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring apparatus with convenient measurement
CN201610163418.3A Withdrawn CN105806211A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring device reasonable in structure and precise in measurement
CN201610163443.1A Withdrawn CN105698669A (en) 2014-07-18 2014-07-18 Reasonable-structure-based measuring device for engagement depth of circuit breaker contacts
CN201610163435.7A Pending CN105698667A (en) 2014-07-18 2014-07-18 Reasonable-scheme-based measuring device for engagement depth of circuit breaker contacts
CN201510419348.9A Pending CN105066873A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring apparatus with accurate measurement
CN201610163433.8A Withdrawn CN105806212A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring device meeting requirement
CN201610163437.6A Withdrawn CN105806213A (en) 2014-07-18 2014-07-18 Convenient and reliable device for measuring depth of engagement of circuit breaker contacts
CN201610163431.9A Pending CN105698666A (en) 2014-07-18 2014-07-18 Precise-measurement-realization-based measuring device for engagement depth of circuit breaker contacts
CN201610163441.2A Pending CN105698668A (en) 2014-07-18 2014-07-18 Guaranteed-measurement-precision-based measuring device for engagement depth of circuit breaker contacts

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CN201410341258.8A Pending CN104111028A (en) 2014-07-18 2014-07-18 Device for measuring meshing depth of contacts of handcart type circuit breaker of closed armored high-voltage switch cabinet
CN201510419349.3A Pending CN105066874A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring apparatus with convenient measurement

Family Applications After (7)

Application Number Title Priority Date Filing Date
CN201610163443.1A Withdrawn CN105698669A (en) 2014-07-18 2014-07-18 Reasonable-structure-based measuring device for engagement depth of circuit breaker contacts
CN201610163435.7A Pending CN105698667A (en) 2014-07-18 2014-07-18 Reasonable-scheme-based measuring device for engagement depth of circuit breaker contacts
CN201510419348.9A Pending CN105066873A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring apparatus with accurate measurement
CN201610163433.8A Withdrawn CN105806212A (en) 2014-07-18 2014-07-18 Breaker contact engagement depth measuring device meeting requirement
CN201610163437.6A Withdrawn CN105806213A (en) 2014-07-18 2014-07-18 Convenient and reliable device for measuring depth of engagement of circuit breaker contacts
CN201610163431.9A Pending CN105698666A (en) 2014-07-18 2014-07-18 Precise-measurement-realization-based measuring device for engagement depth of circuit breaker contacts
CN201610163441.2A Pending CN105698668A (en) 2014-07-18 2014-07-18 Guaranteed-measurement-precision-based measuring device for engagement depth of circuit breaker contacts

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CN (10) CN104111028A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105021132A (en) * 2015-07-15 2015-11-04 国家电网公司 Laser non-contact type centrally-installed cabinet handcart contact stroke tester
CN105021158A (en) * 2015-07-15 2015-11-04 国家电网公司 Handcart switch contact insertion depth tester
CN105203029A (en) * 2015-08-18 2015-12-30 国网四川省电力公司德阳供电公司 Handcart switch cabinet contact contacting travel test system and test method thereof
CN105004251A (en) * 2015-08-18 2015-10-28 国家电网公司 Tool for measuring contact depth of contacts of switch cabinet handcart
CN105953716A (en) * 2016-06-13 2016-09-21 中国石油天然气集团公司 Contact travel testing instrument for 6-kilovolt trolley switch unit
CN106653407A (en) * 2017-02-15 2017-05-10 江苏森源电气股份有限公司 Intelligent detection apparatus for contact travel of tulip contact of circuit breaker
CN110307798A (en) * 2019-06-28 2019-10-08 国网山东省电力公司临沂供电公司 Switchgear dynamic/static contact with insertion depth measuring instrument

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2875293B2 (en) * 1989-08-11 1999-03-31 株式会社日立製作所 Switchboards and circuit breakers
CN1107227A (en) * 1994-02-16 1995-08-23 中国电力工业部电力科学研究院 High-voltage breaker mechanic property testing system and on-line checking method
CN2837779Y (en) * 2005-05-13 2006-11-15 上海中发电气(集团)有限公司 Duckbilled contact engagement depth detector
CN101344369B (en) * 2008-08-18 2010-08-11 天津市电力公司 Handcart once contact stroke test device for high-tension switch cabinet
DE102009047387A1 (en) * 2009-12-02 2011-06-09 Robert Bosch Gmbh Distance measuring device for non-contact distance measurement with integrated protractor
CN202710015U (en) * 2012-07-13 2013-01-30 吉林龙鼎电气股份有限公司 Moving contact and static contact effective meshing length test device
CN202734803U (en) * 2012-08-07 2013-02-13 中国西电集团公司 Device for performing digitization detection for depth of cut of middle mounted switch cabinet
CN203587043U (en) * 2013-10-23 2014-05-07 国家电网公司 Contact insertion depth measuring device for trolley type circuit breaker

Also Published As

Publication number Publication date
CN105698668A (en) 2016-06-22
CN105066874A (en) 2015-11-18
CN105066873A (en) 2015-11-18
CN105698666A (en) 2016-06-22
CN105806213A (en) 2016-07-27
CN105698669A (en) 2016-06-22
CN105698667A (en) 2016-06-22
CN104111028A (en) 2014-10-22
CN105806212A (en) 2016-07-27

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