CN106768700A - A kind of capacitor air-tightness detection method - Google Patents
A kind of capacitor air-tightness detection method Download PDFInfo
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- CN106768700A CN106768700A CN201611105915.4A CN201611105915A CN106768700A CN 106768700 A CN106768700 A CN 106768700A CN 201611105915 A CN201611105915 A CN 201611105915A CN 106768700 A CN106768700 A CN 106768700A
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- hermetically sealed
- flowmeter
- measured capacitance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
A kind of capacitor air-tightness detection method, the detection means that the method is used includes source of the gas, flowmeter and places the hermetically sealed can of measured capacitance device sample, the gas that source of the gas is exported flows into the hermetically sealed can through flowmeter, with the flow measured by flowmeter be not more than standard value be judged as it is qualified.The detection method replaces artificial with instrument, greatly reduces labour intensity, and instantaneous ventilation can be completed, and checkability is significantly improved, and power consumption is substantially reduced.
Description
Technical field
The present invention relates to capacitor air-tightness detection method, in International Patent Classification (IPC), classification belongs to G01M3/10.
Background technology
Whether capacitor air tight test is the important procedure of oil capacitor production, closed for checking capacitor to cover
Lattice.Capping is unqualified to produce oil leak, so as to cause the serious consequence such as on fire.
The main method of prior art：
1st, a number of capacitor sample is upside down in vacuum tank, after vacuumizing and keeping certain hour, manually by
It is individual to check whether oil leak to judge the air-tightness of capacitor.
2nd, a number of capacitor sample is upside down in high-temperature cabinet, is heated and after held for some time, manually one by one
Oil leak is checked whether to judge the air-tightness of capacitor.
The shortcoming of the above method is：Time is long, big energy-consuming, and labour intensity is big, thus influence assay.
The content of the invention
The technical problems to be solved by the invention are：A kind of capacitor air-tightness detection method is proposed, can be improved existing
The problems of technology.
The present invention solve technical problem technical scheme be, a kind of capacitor air-tightness detection method, it is characterised in that：Should
The detection means that method is used includes source of the gas, flowmeter and places the hermetically sealed can of measured capacitance device sample, the gas that source of the gas is exported
Body flows into the hermetically sealed can through flowmeter, with the flow measured by flowmeter be not more than standard value be judged as it is qualified.
When the sealing of measured capacitance device is not good enough, removes to be full of into the gas in hermetically sealed can and measured capacitance device sample is removed in hermetically sealed can
Outside space outside product, will also be into capacitor sample, so that the more gas of consumption, makes the flow measured by flowmeter
Increase.Therefore, the situation of flow increase, and control value are determined, you can the airtight quality to capacitor is judged.
The detection method replaces artificial with instrument, greatly reduces labour intensity, and instantaneous ventilation can be completed, inspection effect
Rate is significantly improved, and power consumption is substantially reduced.
One of further design of the technical scheme is：
--- the source of the gas includes compressed air source, air pressure generator and Leakless valve, and the flow is calculated as micro flow
Meter；
--- the detection means is connected as with tracheae：The output of compressed air source is through air pressure generator, Leakless valve, micro-
Type flowmeter flows into the hermetically sealed can；
--- measured capacitance device sample is put into the hermetically sealed can；
--- Leakless valve is connected, after the stipulated time, the data P1 of micro flowmeter is read and is remembered；
--- the hermetically sealed can is opened, measured capacitance device sample is taken out, by equal number profile and measured capacitance device sample
Standard capacitor sample that is identical and being considered as No leakage is put into the hermetically sealed can；
--- Leakless valve is connected, after the stipulated time, the data P2 of micro flowmeter is read and is remembered；
--- P=P2-P1 is calculated, when P is more than zero, the device leakage of display measured capacitance is not leaked otherwise.
The two of the further design of the technical scheme are：
--- the source of the gas includes compressed air source, air pressure generator and Leakless valve, and the flowmeter includes Section 1 stream
Device, Section 2 stream device and difference gauge；
--- the hermetically sealed can includes the 1st hermetically sealed can and the 2nd hermetically sealed can, and each through Section 1 stream device, Section 2 stream respectively
Device is access to each outlet of a tee pipe coupling；The detection means makes the output of compressed air source be sent out through air pressure with tracheae connection
Raw device, Leakless valve flow into the common inlet of the tee pipe coupling；Section 1 described in the two imports difference UNICOM of the difference gauge
Stream device, the downstream of Section 2 stream device；
--- it is measured capacitance device sample and equal number profile is identical with measured capacitance device sample and be considered as without letting out
The standard capacitor sample of leakage is respectively put into the 1st hermetically sealed can and the 2nd hermetically sealed can；
--- Leakless valve is connected, after the stipulated time, the data of difference gauge is read, when it is more than zero, the tested electricity of display
Container leakage, does not leak otherwise.
The two of design are that standard sample and test sample are detected simultaneously, improve detection efficiency than one of design, and can reduce
Requirement to source of the gas stability.
Brief description of the drawings
Fig. 1 is the 1st embodiment structure of the detecting device schematic diagram of the invention；
Fig. 2 is the 2nd embodiment structure of the detecting device schematic diagram of the invention.
Specific embodiment
1st embodiment structure of the detecting device of the invention is as shown in figure 1, mainly include：From air compressor or pipe network
The compressed air source 7, (model of air pressure generator 6：VBA10A-02GN SMC), (model of Leakless valve 5：VX3110V-01-5DZ1-
B SMC), (model of micro flowmeter 4：) and hermetically sealed can 1 MF4000.Connected with tracheae 3, make the output of compressed air source 7 through gas
The pressure pressure-reduced and-regulated of generator 6, using Leakless valve 5 as switch control, most flows into hermetically sealed can 1 through micro flowmeter 4 afterwards.User
Method is：
--- measured capacitance device sample 2 is put into the hermetically sealed can 1；
--- Leakless valve 5 is connected, after the stipulated time, the data P1 of micro flowmeter 4 is read and is remembered；
--- hermetically sealed can 1 is opened, measured capacitance device sample 2 is taken out, by equal number profile and measured capacitance device sample phase
Standard capacitor sample 8 that is same and being considered as No leakage is put into hermetically sealed can 1；
--- Leakless valve 5 is connected, after the stipulated time, the data P2 of micro flowmeter 4 is read and is remembered；
--- P=P2-P1 is calculated, when P is more than zero, measured capacitance device sample leakage is shown, not leaked otherwise.
The embodiment is used to judge the standard value of quality from the measurement to standard capacitor sample 8, if data stabilization,
Can also be by standard capacitor sample 8, disposably measurement acquired results be fixed as standard value, to save every time to standard capacitance
The trouble of the measurement of device sample 8.
2nd embodiment structure of the detecting device of the invention is as shown in Fig. 2 mainly include：From air compressor or pipe network
Compressed air source 7, air pressure generator 6, Leakless valve 5, the 1st capillary 41, the 2nd capillary 42, difference gauge 43 are ((by Yokogawa
EJA110A differential pressure transmitters and display instrument are constituted), the 1st hermetically sealed can 11, the 2nd hermetically sealed can 12 and three-way pipe 31.Connected with tracheae 3
Connecing makes the 1st capillary 41, the 2nd capillary 42 be access to each outlet of three-way pipe 31, the output of compressed air source 7 is occurred through air pressure
The pressure-reduced and-regulated of device 6, using Leakless valve 5 as switch control, then flows into the common inlet of three-way pipe 31；The two of difference gauge 43 enter
Mouth difference UNICOM the 1st hermetically sealed can 11, the 2nd hermetically sealed can 12.Application method is：
--- it is measured capacitance device sample 2 and equal number profile is identical with measured capacitance device sample and be considered as without letting out
The standard capacitor sample 8 of leakage is respectively put into the 1st hermetically sealed can 11 and the 2nd hermetically sealed can 12；
--- connect Leakless valve 5, after the stipulated time, read difference gauge 43 data, when it is more than zero, show by
Capacitor sample leakage is surveyed, is not leaked otherwise.
Two embodiment uses the appropriate caliber and such as refrigerator compact of length by calculating or experiment determines
The refrigerant throttle capillary tube that formula refrigerating plant is set is used as throttling arrangement, naturally it is also possible to using such as restricting orifice, but with
Capillary adjusts most convenient and stabilization.
In addition two embodiment：
--- the volume of hermetically sealed can should be as small as possible, to improve accuracy of detection；
--- connect the stipulated time of Leakless valve 5 after read data, the stipulated time can be designed to a certain instantaneous moment or
A certain Continuous Observation time.The morning and evening of the time or length, can according to sealing tank volume and sample situation, by calculate or
Experiment statisticses are obtained.
In the 1st embodiment, micro flowmeter 4 is sensor and display instrument integral type, naturally it is also possible to for split type.
In the 2nd embodiment, two imports difference UNICOM the 1st hermetically sealed can 11 of difference gauge 43, the 2nd hermetically sealed can 12, certainly
The 1st capillary 41, the respective exit of the 2nd capillary 42 can be respectively connected, it is more stable with the former.1st capillary the 41, the 2nd
The caliber and length of capillary 42 all should be identical, and they are respectively connecting to the 1st hermetically sealed can 11, the pipe of the pipeline of the 2nd hermetically sealed can 12
Footpath and length also all should be identical.
Claims (3)
1. a kind of capacitor air-tightness detection method, it is characterised in that：The detection means that the method is used includes source of the gas, flowmeter
With the hermetically sealed can for placing measured capacitance device sample, the gas that source of the gas is exported flows into the hermetically sealed can through flowmeter, with flowmeter
Measured flow be not more than standard value be judged as it is qualified.
2. according to detection method described in claim 1, it is characterised in that：
--- the source of the gas includes compressed air source, air pressure generator and Leakless valve, and the flow is calculated as micro flowmeter；
--- the detection means is connected as with tracheae：The output of compressed air source is through air pressure generator, Leakless valve, miniature stream
Gauge flows into the hermetically sealed can；
--- measured capacitance device sample is put into the hermetically sealed can；
--- Leakless valve is connected, after the stipulated time, the data P1 of micro flowmeter is read and is remembered；
--- the hermetically sealed can is opened, measured capacitance device sample is taken out, equal number profile is identical with measured capacitance device sample
And be considered as the standard capacitor sample of No leakage and be put into the hermetically sealed can；
--- Leakless valve is connected, after the stipulated time, the data P2 of micro flowmeter is read and is remembered；
--- P=P2-P1 is calculated, when P is more than zero, the device leakage of display measured capacitance is not leaked otherwise.
3. according to detection method described in claim 1, it is characterised in that：
--- the source of the gas includes compressed air source, air pressure generator and Leakless valve, and the flowmeter is filled including Section 1 stream
Put, Section 2 stream device and difference gauge；
--- the hermetically sealed can includes the 1st hermetically sealed can and the 2nd hermetically sealed can, and each through Section 1 stream device, Section 2 stream device respectively
It is access to each outlet of a tee pipe coupling；The detection means makes the output of compressed air source occur through air pressure with tracheae connection
Device, Leakless valve flow into the common inlet of the tee pipe coupling；Section 1 stream described in the two imports difference UNICOM of the difference gauge
The downstream of device, Section 2 stream device；
--- it is measured capacitance device sample and equal number profile is identical with measured capacitance device sample and be considered as No leakage
Standard capacitor sample is respectively put into the 1st hermetically sealed can and the 2nd hermetically sealed can；
--- Leakless valve is connected, after the stipulated time, the data of difference gauge is read, when it is more than zero, measured capacitance device is shown
Leakage, does not leak otherwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105915.4A CN106768700A (en) | 2016-12-06 | 2016-12-06 | A kind of capacitor air-tightness detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105915.4A CN106768700A (en) | 2016-12-06 | 2016-12-06 | A kind of capacitor air-tightness detection method |
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| CN106768700A true CN106768700A (en) | 2017-05-31 |
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| CN201611105915.4A Pending CN106768700A (en) | 2016-12-06 | 2016-12-06 | A kind of capacitor air-tightness detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553802A (en) * | 2019-09-12 | 2019-12-10 | 爱发科东方真空(成都)有限公司 | Leakage detection device and method for large leakage measurement |
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| JPH10197389A (en) * | 1997-01-10 | 1998-07-31 | Matsushita Electric Ind Co Ltd | Device for inspecting aluminum electrolytic capacitor for airtightness |
| JP2002184658A (en) * | 2000-12-12 | 2002-06-28 | Nippon Chemicon Corp | Device and method for inspecting electrolytic capacitor for airtightness |
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| JPH10197389A (en) * | 1997-01-10 | 1998-07-31 | Matsushita Electric Ind Co Ltd | Device for inspecting aluminum electrolytic capacitor for airtightness |
| JP2002184658A (en) * | 2000-12-12 | 2002-06-28 | Nippon Chemicon Corp | Device and method for inspecting electrolytic capacitor for airtightness |
| CN201532292U (en) * | 2009-09-11 | 2010-07-21 | 彭光正 | Pneumatic circuit of multifunctional gas-tightness detector |
| CN101825514A (en) * | 2010-05-21 | 2010-09-08 | 北京理工大学 | Flow-type leakage detection method and device thereof |
| CN104880288A (en) * | 2015-06-16 | 2015-09-02 | 湖南天雁机械有限责任公司 | Method and device for detecting airtightness of turbine box assembly |
| CN205628651U (en) * | 2016-03-31 | 2016-10-12 | 珠海格力新元电子有限公司 | Online sealing performance detection equipment of film capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553802A (en) * | 2019-09-12 | 2019-12-10 | 爱发科东方真空(成都)有限公司 | Leakage detection device and method for large leakage measurement |
| CN110553802B (en) * | 2019-09-12 | 2022-01-14 | 爱发科东方真空(成都)有限公司 | Leakage detection device and method for large leakage measurement |
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