CN100561159C - A kind of apparatus for testing weeping of plastic fluid container - Google Patents
A kind of apparatus for testing weeping of plastic fluid container Download PDFInfo
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- CN100561159C CN100561159C CNB2006101443981A CN200610144398A CN100561159C CN 100561159 C CN100561159 C CN 100561159C CN B2006101443981 A CNB2006101443981 A CN B2006101443981A CN 200610144398 A CN200610144398 A CN 200610144398A CN 100561159 C CN100561159 C CN 100561159C
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- container
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Abstract
A kind of apparatus for testing weeping of plastic fluid container comprises high-pressure frequency-conversion power supply [1], high-field electrode [2], high-field electrode gear train [3], low-field electrode [4], current detecting unit [5] and container to be checked [6].High-field electrode [2] adopts metal material to make, for point-point to electrode structure or loop configuration, be fixed on the insulating support [7].Insulating support [7] is connected with high-field electrode gear train [3], and high-field electrode gear train [3] produces high-field electrode [2] and rotatablely moves or rectilinear motion.Low-field electrode [4] is a sheet metal, and container to be checked [6] lies in a horizontal plane on the low-field electrode [4]; High-field electrode [2], low-field electrode [4] and container to be checked [6] are formed discharge loop, and current detecting unit [5] detects the current signal of discharge loop.The present invention can be applicable to the online detection of plastic bottle liquid bottleneck sealing property.
Description
Technical field
The present invention relates to a kind of plastic fluid container sealing property detection device, particularly utilize high pressure pulse discharge to carry out the device that leakage detects.
Background technology
At present, adopt packaged with plastic container liquid at medicine and beverage industry, this class I liquid I container generally includes bottle and bottleneck more.Because the sealing property of container directly influences the shelf-life of dress product in it, and then has influence on person health and life security, therefore need carry out sealing property and detect it.Most enterprises adopt random sampling to detect, and by artificial or machine Video Detection, detection efficiency is low, narrow range, and poor reliability, effect is bad.
Chinese patent 03157083 is the difference of the fluid impedance that senses according to leakage sensor, the judgment basis that whether contacts as leakage sensor with liquid, output leakage signal promotes relay and produces the signal that opens or closes, and then the operation of driving-alarm device, carries out leakage and detects.Chinese patent 01142523 be according between two electrodes on the sensor part by the leakage short circuit and output signal is carried out leakage and detected.Chinese patent 200410086783 provides a kind of leakage sensor and leakage detection system, leakage having taken place when unusual, by being arranged on the leakage sensor and the pronunciation part of system's foots such as basal surface and leakage accommodation section, determines the leakage occurrence positions.Above-mentioned patent needs sensor directly to contact with leakage, then can't detect some minor leakage.
The high-tension current Density Detection equipment that Bausch Stroebel company develops can be automatically detects the injection medicine bottle of pharmaceutical products factory.Utilize electric current medicine bottle bottleneck, bottle, the bottle end and bottleneck sealing condition to be tested by flow.But structure and parameter that it is concrete there is no report.
Summary of the invention
The objective of the invention is in order to improve detection efficiency and detection sensitivity, propose a kind of non-contact type high voltage discharge apparatus for testing weeping.
The present invention includes six ingredients: high-pressure frequency-conversion power supply, high-field electrode, high-field electrode gear train, low-field electrode, current detecting unit and container to be checked.
The output high-pressure side of high-pressure frequency-conversion power supply is connected with high-field electrode by high-tension cable, and the output earth terminal is connected with low-field electrode by the former limit of the electric current detecting coil of current detecting unit, and vessel level to be checked places on the low-field electrode.Low-field electrode is a sheet metal.High-field electrode places the bottle mouth sealing place of container to be checked, and keeps certain clearance, requires to adopt point-point to electrode structure or loop configuration according to difference.High-field electrode is connected with the high-field electrode gear train by insulating support, the main body of high-field electrode gear train is a motor, the high-field electrode gear train produces and rotatablely moves when high-field electrode adopts point-point to electrode structure, the anglec of rotation is 180 degree, the high-field electrode gear train produces straight reciprocating motion when high-field electrode adopts loop configuration, and stroke is decided by the bottleneck height.Current detecting unit mainly comprises electric current detecting coil, shaping circuit, threshold setting circuit, voltage comparator circuit, leakage signal output apparatus.The secondary of electric current detecting coil is through behind the shaping circuit, is connected respectively to the positive-negative input end of voltage comparator circuit with the output of threshold setting circuit, and the output terminal of voltage comparator circuit is connected to the leakage signal output apparatus.
The present invention is placed on finished product vessel level to be checked on the low-field electrode, so that bottle mouth sealing place full of liquid places sealing part with high-field electrode, the ac high-voltage that the high-pressure frequency-conversion power supply will have certain frequency and amplitude is applied on high-field electrode and the low-field electrode.When the sealing part poor sealing caused leakage or minor leakage, high-field electrode just can produce discharge breakdown in leakage, and current detecting unit detects (greater than setting value) behind the current signal of electric breakdown, and output leakage signal shows that this product is defective.According to different bottleneck diameters, liquid medium and detection speed requirement, regulate the voltage magnitude and the frequency of high-pressure frequency-conversion power supply output.
Liquid in container medium conductivity to be checked of the present invention can be 10
-6-10
-2Between the Siemens/cm.
Good effect of the present invention is:
1. automaticity height, the detection sensitivity height.
2. electrode structure is simple, long service life.
3. the detection efficiency height can be used for the online detection of production run, product is carried out 100% detect.
Description of drawings
Fig. 1 is a structural representation of the present invention, among the figure: 1 high-pressure frequency-conversion power supply, 2 high-field electrodes, 3 high-field electrode gear trains, 4 low-field electrodes, 5 current detecting units, 6 containers to be checked.
Fig. 2 is a high-field electrode structural representation of the present invention, among the figure: 2 high-field electrodes, 7 insulating supports.
Fig. 3 is a current detecting unit composition frame chart of the present invention.Among the figure: 8 electric current detecting coils, 9 shaping circuits, 10 threshold setting circuit, 11 voltage comparator circuits, 12 leakage signal output apparatus.
Fig. 4 is a current detecting unit circuit structure diagram of the present invention.Among the figure: 1 high-pressure frequency-conversion power supply, 4 low-field electrodes, 8 electric current detecting coils, 10 threshold setting circuit, 12 leakage signal output apparatus, 13 resistance, 14 potentiometers, 15 diodes, 16 voltage comparators.
Embodiment
Further specify content of the present invention below in conjunction with the drawings and the specific embodiments.
As shown in Figure 1: the present invention includes high-pressure frequency-conversion power supply 1, high-field electrode 2, high-field electrode gear train 3, low-field electrode 4, current detecting unit 5 and container to be checked 6.High-pressure frequency-conversion power supply 1 is used for producing 500 hertz to 30 KHz, the output of the voltage of 10-45 kilovolt.High-field electrode 2 adopts metal material, for example stainless steel or copper become, for point-point to electrode structure or loop configuration, be fixed on the insulating support 7, insulating support 7 is connected with high-field electrode gear train 3, and high-field electrode gear train 3 can make high-field electrode 2 produce and rotatablely move or rectilinear motion.Low-field electrode 4 adopts metal material, and for example corrosion resistant plate or copper coin are made.Container 6 to be checked lies in a horizontal plane on the low-field electrode 4.High-field electrode 2, low-field electrode 4 and container to be checked 6 are formed discharge loop.Current detecting unit 5 is used for detecting the current signal of discharge loop, when current signal during greater than certain value, and output leakage signal.
Fig. 2 is a high-field electrode structural representation of the present invention.Fig. 2 a be point-point to electrode structure, Fig. 2 b is a loop configuration.High-field electrode 2 adopts with insulating support 7 and is threaded.Insulating support 7 adopts cylindrical structurals, with insulating material for example epoxy or tygon make, be used for the connection between high-field electrode 2 and the high-field electrode gear train 3.
Fig. 3 is a current detecting unit composition frame chart of the present invention, mainly by electric current detecting coil 8, and shaping circuit 9, threshold setting circuit 10, voltage comparator circuit 11, leakage signal output apparatus 12 is formed.Electric current detecting coil 8 is connected between high-pressure frequency-conversion power supply 1 and the low-field electrode 4, detected current signal process shaping circuit 9 backs are input to voltage comparator circuit 11 with the set-point of threshold setting circuit 10, when detected current signal during greater than certain value, leakage signal output apparatus 12 output leakage signals.
Fig. 4 is a current detecting unit circuit structure diagram of the present invention.The former limit series connection of electric current detecting coil 8 is between high-pressure frequency-conversion power supply 1 and low-field electrode 4, the secondary of electric current detecting coil 8 is connected with diode 15 with resistance 13 backs in parallel, and then be connected to the positive input terminal of voltage comparator 16 after in parallel with potentiometer 14, the threshold setting circuit is a resitstance voltage divider, the DC voltage of exportable 0-5 volt is to the negative input end of voltage comparator 16, voltage comparator 16 is one 8 pin integrated chips, as the two voltage comparators of LM393,1,2,3 pin are formed one road comparer, 4 pin ground connection, 8 pin connect power supply, and 2 pin are positive input terminal, 3 pin are negative input end, and 1 pin output terminal is connected to leakage signal output apparatus 12 by DC relay output closure or open circuit signaling.
The high-field electrode 2 of the specific embodiment of the invention is become by stainless steel or copper.Point-point is during to electrode structure, electrode diameter 1-3 millimeter, and pyramidal structure is adopted in the end, and distance is by the bottleneck diameter decision of container 6 to be checked between point and the point, and electrode two is most advanced and sophisticated to keep certain clearance with the bottle mouth sealing place, is generally the 3-5 millimeter; During loop configuration, electrode also needs to keep certain clearance with the bottle mouth sealing place, is generally the 3-5 millimeter.Insulating support 7 is by insulating material epoxy or tygon manufacturing, and length is greater than 10 centimetres.Low-field electrode 4 is made by corrosion resistant plate or copper coin, and long 10 centimetres of electrode is wide 5 centimetres, thick 1-2 millimeter.According to different bottleneck diameters, liquid medium and detection speed requirement, regulate the voltage magnitude and the frequency of high-pressure frequency-conversion power supply output, output voltage reaches as high as 45 kilovolts, and frequency can be regulated between 30 KHz at 500 hertz.The conductivity of liquid medium can be 10 in the container 6 to be checked
-6-10
-2Between the Siemens/cm.
The course of work of the present invention is as described below, container 6 to be checked is lain in a horizontal plane on the low-field electrode 4, so that bottle mouth sealing place full of liquid, by high-field electrode gear train 3 high-field electrode 2 is placed sealing part, the ac high-voltage that high-pressure frequency-conversion power supply 1 will have certain frequency and amplitude is applied on high-field electrode 2 and the low-field electrode 4.When high-field electrode 2 adopts sharp electrode structure, need the Rotate 180 degree in the course of work, to finish the detection of sealing a week.When the sealing part poor sealing causes leakage or minor leakage, high-field electrode 2 just can produce discharge breakdown in leakage, electric current detecting coil 8 detects the discharge current signal, be input to voltage comparator circuit 11 through the set-point with threshold setting circuit 10 behind the shaping circuit 9, when detected current signal during greater than certain value, leakage signal output apparatus 12 output leakage signals.
The present invention can be applicable to the online detection of plastic bottle liquid bottleneck sealing property.
Claims (4)
1, a kind of apparatus for testing weeping of plastic fluid container is characterized in that comprising high-pressure frequency-conversion power supply [1], high-field electrode [2], high-field electrode gear train [3], low-field electrode [4], current detecting unit [5] and container to be checked [6]; High-field electrode [2] adopts metal material to make, for point-point to electrode structure or loop configuration, be fixed on the insulating support [7]; Insulating support [7] is connected with high-field electrode gear train [3], and high-field electrode gear train [3] produces high-field electrode [2] and rotatablely moves or rectilinear motion; Low-field electrode [4] is a sheet metal, and container to be checked [6] lies in a horizontal plane on the low-field electrode [4]; High-field electrode [2], low-field electrode [4] and container to be checked [6] are formed discharge loop, the output high-pressure side of high-pressure frequency-conversion power supply [1] is connected with high-field electrode [2] by high-tension cable, and the output earth terminal is connected with low-field electrode [4] by the former limit of the electric current detecting coil of current detecting unit [5]; Current detecting unit [5] detects the current signal of discharge loop.
2, according to the described a kind of apparatus for testing weeping of plastic fluid container of claim 1, it is characterized in that current detecting unit mainly by electric current detecting coil [8], shaping circuit [9], threshold setting circuit [10], voltage comparator circuit [11], leakage signal output apparatus [12] is formed; The former limit series connection of electric current detecting coil [8] is between high-pressure frequency-conversion power supply [1] and low-field electrode [4], the secondary of electric current detecting coil [8] is connected with diode [15] with resistance [13] back in parallel, and then with the positive input terminal that is connected to voltage comparator [16] after potentiometer [14] is in parallel, the output of threshold setting circuit is connected to the negative input end of voltage comparator [16], and the output terminal of voltage comparator [16] is connected to leakage signal output apparatus [12].
3, according to the described a kind of apparatus for testing weeping of plastic fluid container of claim 1, it is characterized in that when high-field electrode [2] adopted point-point to electrode structure, high-field electrode gear train [3] produced and rotatablely moves, the anglec of rotation is 180 degree; When high-field electrode [2] adopted loop configuration, high-field electrode gear train [3] produced straight reciprocating motion, and stroke is decided by the bottleneck height.
4,, it is characterized in that insulating support [7] adopts cylindrical structural, makes with insulating material according to the described a kind of apparatus for testing weeping of plastic fluid container of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101443981A CN100561159C (en) | 2006-12-06 | 2006-12-06 | A kind of apparatus for testing weeping of plastic fluid container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101443981A CN100561159C (en) | 2006-12-06 | 2006-12-06 | A kind of apparatus for testing weeping of plastic fluid container |
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| Publication Number | Publication Date |
|---|---|
| CN1963427A CN1963427A (en) | 2007-05-16 |
| CN100561159C true CN100561159C (en) | 2009-11-18 |
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| CNB2006101443981A Expired - Fee Related CN100561159C (en) | 2006-12-06 | 2006-12-06 | A kind of apparatus for testing weeping of plastic fluid container |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288373A (en) * | 2011-07-06 | 2011-12-21 | 湖南正中制药机械有限公司 | Full-automatic infusion bottle electronic micro-hole leakage detector |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743533A (en) * | 2013-12-28 | 2014-04-23 | 李洪普 | Bulb leakage detecting method, bulb leakage detecting system and bulb leakage detecting device |
| CN105277320B (en) * | 2014-06-17 | 2017-11-21 | 艾默生网络能源有限公司 | A kind of leakage detection sensor and system |
| CN106197907B (en) * | 2016-08-31 | 2018-09-14 | 中国大冢制药有限公司 | Bottle packaging aperture machine apparatus for testing weeping |
| CN114486129A (en) * | 2022-01-18 | 2022-05-13 | 广州博联思医疗技术有限公司 | Method for testing porous plate by high-pressure ionization method |
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|---|---|---|---|---|
| US4677372A (en) * | 1985-06-18 | 1987-06-30 | American Hospital Supply Corp. | Cuvette belt faulty seal detector |
| EP1099946A1 (en) * | 1998-09-10 | 2001-05-16 | ORPHEUS Geophysik Gesellschaft für Baugrund- und Umweltanalytik mbH | Leak sensing device for plastic liners and corresponding method of detecting leaks |
| CN1350639A (en) * | 1999-03-10 | 2002-05-22 | 乔维恩电机株式会社 | Inspection method for sealed package |
| US6590375B1 (en) * | 1999-10-12 | 2003-07-08 | The United States Of America As Represented By The Secretary Of The Army | Device and method for detection and/or inspection of conductive particles using high-voltage field |
| CN1595131A (en) * | 2003-09-12 | 2005-03-16 | 蔡曾宇 | Leakage liquid detecting device |
| US20050204802A1 (en) * | 2004-02-04 | 2005-09-22 | Rolls-Royce Plc | Leakage drain |
-
2006
- 2006-12-06 CN CNB2006101443981A patent/CN100561159C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677372A (en) * | 1985-06-18 | 1987-06-30 | American Hospital Supply Corp. | Cuvette belt faulty seal detector |
| EP1099946A1 (en) * | 1998-09-10 | 2001-05-16 | ORPHEUS Geophysik Gesellschaft für Baugrund- und Umweltanalytik mbH | Leak sensing device for plastic liners and corresponding method of detecting leaks |
| CN1350639A (en) * | 1999-03-10 | 2002-05-22 | 乔维恩电机株式会社 | Inspection method for sealed package |
| US6590375B1 (en) * | 1999-10-12 | 2003-07-08 | The United States Of America As Represented By The Secretary Of The Army | Device and method for detection and/or inspection of conductive particles using high-voltage field |
| CN1595131A (en) * | 2003-09-12 | 2005-03-16 | 蔡曾宇 | Leakage liquid detecting device |
| US20050204802A1 (en) * | 2004-02-04 | 2005-09-22 | Rolls-Royce Plc | Leakage drain |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288373A (en) * | 2011-07-06 | 2011-12-21 | 湖南正中制药机械有限公司 | Full-automatic infusion bottle electronic micro-hole leakage detector |
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| CN1963427A (en) | 2007-05-16 |
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