CN105699026B - A kind of sealing test system and tightness testing method - Google Patents
A kind of sealing test system and tightness testing method Download PDFInfo
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- CN105699026B CN105699026B CN201610043823.1A CN201610043823A CN105699026B CN 105699026 B CN105699026 B CN 105699026B CN 201610043823 A CN201610043823 A CN 201610043823A CN 105699026 B CN105699026 B CN 105699026B
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- vacuum
- differential pressure
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- detection
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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
- G01M3/32—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 for containers, e.g. radiators
- G01M3/34—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 for containers, e.g. radiators by testing the possibility of maintaining the vacuum in containers, e.g. in can-testing machines
Abstract
The invention discloses a kind of sealing test systems, including closed container, vacuum evacuation device, detection device, PLC controller, the closed container has a detection chambers and standard chamber, the detection chambers are connected to by the first vacuum isolating valve with the standard chamber, the vacuum evacuation device is connected to by the second vacuum isolating valve with the detection chambers, the detection device is arranged in the closed container, for detecting vacuum values in the closed container, the vacuum evacuation device, the detection device signal end be electrically connected with the PLC controller.Compared with prior art, sealing test system structure provided by the present invention is simple, easy to operate, and test speed is fast, accurate testing degree is high, can accurately obtain leakage value.In addition, invention additionally discloses a kind of tightness testing methods of seal degree using the sealing test system testing product.
Description
Technical field
The invention belongs to food, medical packaging sealing propertytest field, and in particular to a kind of sealing test system and sealing
Test method.
Background technique
The sealing propertytest of drug is always to be in a kind of ambiguous state in pharmacy procedure at present, there is complete phase
What letter packaging No leakage or leakage were ignored within the allowable range and directly, this does not meet the national quality management of GMP defined
Specification uses the very big hidden danger of security presence to drug；It is more then be to utilize micro- life using more ancient Microbial Challenge method
Object invades drug to be checked to test the qualification of drug, and the shallowness of this method is long for the detection time period, and to drug to be checked
Detection cause irreversible destruction, it is problematic by the accuracy of/failure testing result without precision data.
Summary of the invention
The present invention provides a kind of sealing test system and tightness testing methods, it is therefore intended that solution exists in the prior art
The problem of, provide that a kind of detection cycle is short, speed is fast, detection data accurately sealing test system and test method.
To achieve the above object, it the embodiment of the invention provides a kind of sealing test system, including closed container, vacuumizes
Device, detection device, PLC controller, the closed container have a detection chambers and standard chamber, and the detection chambers pass through
First vacuum isolating valve is connected to the standard chamber, and the vacuum evacuation device passes through the second vacuum isolating valve and the test chamber
Room connection, the detection device are arranged in the closed container, described to take out very for detecting vacuum values in the closed container
Empty device, the detection device signal end be electrically connected with the PLC controller.
In the above-mentioned technical solutions, the detection chambers and standard being connected to by the first vacuum isolating valve in the closed container
Chamber, standard chamber are connected to vacuum evacuation device by the second vacuum isolating valve, and detection device is arranged in detection chambers and standard chamber
Interior, and and be electrically connected with PLC controller so that after evacuation, separated out at the beginning of two by the first, second vacuum isolating valve
The identical airtight vacuum cavity of beginning vacuum values, after being kept for a period of time, PLC controller obtains the pressure of standard chamber and detection chambers
Difference, so as to conveniently obtain detection article leakage situation, avoid and destroy article to be detected, ensure that
Integrality of the article after detecting is detected, and may be repeated detection, will not to pass through the product reperformance test of detection,
Obtain most accurate leak data.
Further, the detection device includes little differential pressure sensor, vacuum film rule, and the little differential pressure sensor has
Positive and negative end, the little differential pressure sensor negative terminal, vacuum film rule are arranged in the standard chamber, and the differential pressure passes
Sensor anode is arranged in the detection chambers, and little differential pressure sensor, vacuum film rule signal output end are controlled with the PLC
Device electrical connection.
In the above-mentioned technical solutions, it by using little differential pressure sensor, greatly improves to the gas sensitization leaked out
Degree；It is advised using vacuum film, improves the accuracy of vacuum values, so that 5 microns of minimum detectable of leak hole, meanwhile, it can root
Vacuum film is set according to different drug pharmacological property advises vacuum degree to be achieved to adjust the precision of test.
Further, the sealing test system further includes a display device, and the display device and the PLC are controlled
Device electrical connection, for showing that the little differential pressure sensor, the numerical value of vacuum film rule detection and the PLC controller are drawn out
Pressure history in detection chambers and standard chamber.
Further, the vacuum evacuation device include the first vacuum pump, the second vacuum pump, third vacuum pump, described first
Vacuum pump, the second vacuum pump, third vacuum pump are sequentially connected in series connection, and first vacuum pump and second vacuum isolating valve connect
It connects.The vacuum pump being sequentially connected in series by using three vacuumizes sealing test system, can effectively improve and vacuumize effect
Rate, and meet high vacuum demand.
The present invention also provides a kind of sealing of seal degree using sealing test system testing product described above surveys
Method for testing, comprising the following steps:
S1, drug to be detected is placed in detection chambers, closes detection chambers door, open first vacuum separation
Valve, the second vacuum isolating valve, vacuum evacuation device vacuumize closed container；
S2, after vacuum values reach preset value in closed container, successively close the second vacuum isolating valve, the first vacuum separation
Valve, it is P that the detection device, which detects and records the initial vacuum value in closed container at this time,；
S3, certain time interval T is kept, it is P' that the detection device, which detects and records the vacuum values in T time closed container,；
S4, the initial vacuum value P is compared with the vacuum values P' that measures after T time is kept, obtain P and P' it
Between differential pressure value be Δ P', if when Δ P' is positive value, then illustrating that detected drug has leakage in detection chambers.
Further, in above-mentioned S2, the detection device includes little differential pressure sensor, vacuum film rule, the elementary errors
Pressure sensor has positive and negative end, and the little differential pressure sensor negative terminal, vacuum film rule are arranged in the standard chamber,
The little differential pressure sensor anode is arranged in the detection chambers；
It is P2 that the vacuum film rule, which detect the initial vacuum value in the standard chamber, after T time, the vacuum
It is P1, the differential pressure value Δ between the P1 and P2 that film rule, which are detected and record the standard vacuum value in standard chamber described in T time,
P1 is then the leakage value of standard vacuum；
It is P4 that the little differential pressure sensor, which detects the indoor initial vacuum value of test chamber, described micro- after T time
It is P3, the differential pressure value between the P3 and P4 that differential pressure pick-up, which detects and records test chamber indoor vacuum values when T time,
Δ P2 is then the leakage value of detection chambers；The leakage value Δ P1's of the leakage value Δ P2 and standard vacuum of the detection chambers
Difference DELTA P is the leakage value for detecting drug.
The present invention has the beneficial effect that:
1, high sensitivity: since system is added to little differential pressure sensor, the gas leaked out to drug is greatly improved
Susceptibility, while vacuum film rule are also more than common vacuum transducer, it is very accurate for the accuracy of vacuum values, so that very
The leak hole of 5 microns of empty detector minimum detectable.
2, detection sensitivity is adjustable: set according to different drug pharmacological property vacuum film advise vacuum degree to be achieved come
Adjust the precision of test.
3, be lossless, duplicate to drug: vacuum test will not destroy the pharmacological property of drug, and the drug of illogical test can weigh
It is multiple to obtain most accurate leak data into test again.
4, detection time is short: the detection time of single product to be detected is within 0-30 seconds.
Compared with prior art, sealing test system structure provided by the present invention is simple, easy to operate, test period
Short, test speed is fast, accurate testing degree is high, can accurately obtain leakage value.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of sealing test system provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of tightness testing method provided in an embodiment of the present invention；
In figure, 1- standard chamber, 2- detection chambers, 3- vacuum evacuation device, the first vacuum isolating valve of 4-, the second vacuum of 5- every
Disconnected valve, 6- detection device, 61- vacuum film rule, 62- little differential pressure sensor.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Embodiment
As shown in Figure 1, the embodiment of the invention provides a kind of sealing test system, including closed container, vacuum evacuation device
3, detection device 6, PLC controller (not shown), the closed container has a detection chambers 2 and standard chamber 1, described
Detection chambers 2 are connected to by the first vacuum isolating valve 4 with the standard chamber 1, the vacuum evacuation device 3 pass through the second vacuum every
Disconnected valve 5 is connected to the standard chamber, in the present embodiment, it is preferred that the vacuum evacuation device 3 includes the first vacuum pump, second
Vacuum pump, third vacuum pump, first vacuum pump, the second vacuum pump, third vacuum pump are sequentially connected in series connection, and described first is true
Sky pump is connect with second vacuum isolating valve 5；The vacuum pump being sequentially connected in series by using three is to sealing test system
It vacuumizes, can effectively improve and vacuumize efficiency, and meet high vacuum demand.
The detection device 6 is arranged in the closed container, for detecting vacuum values in the closed container, this implementation
In example, the detection device 6 includes little differential pressure sensor 62, vacuum film rule 61, and the little differential pressure sensor 62 has positive and negative
End, the negative terminal of the little differential pressure sensor 62, vacuum film rule 61 are arranged in the standard chamber 1, the differential pressure
The anode of sensor 62 is arranged in the detection chambers 2, the signal output of the little differential pressure sensor 62, vacuum film rule 61
End is electrically connected with the PLC controller, and the signal end of the vacuum evacuation device 3 is electrically connected with the PLC controller.
The sealing test system further includes a display device (not shown), and the display device and the PLC are controlled
Device electrical connection processed, for showing that the little differential pressure sensor 62, vacuum film advise 61 numerical value detected and the PLC controller
Pressure history in drawn out detection chambers 2 and standard chamber 1.
As shown in Fig. 2, the present invention also provides a kind of sealing journeys using sealing test system testing product described above
The tightness testing method of degree, comprising the following steps:
S1, drug to be detected is placed in detection chambers, closes detection chambers door, open first vacuum separation
Valve, the second vacuum isolating valve, vacuum evacuation device vacuumize closed container；
S2, after vacuum values reach preset value in closed container, successively close the second vacuum isolating valve, the first vacuum separation
Valve, it is P that the detection device, which detects and records the initial vacuum value in closed container at this time,；
S3, certain time interval T is kept, it is P' that the detection device, which detects and records the vacuum values in T time closed container,；
S4, the initial vacuum value P is compared with the vacuum values P' that measures after T time is kept, obtain P and P' it
Between differential pressure value be Δ P', if when Δ P' is positive value, then illustrating that detected drug has leakage in detection chambers.
Working principle of the present invention is as follows:
Drug to be detected is placed in detection chambers, detection chambers door is closed, opens first vacuum isolating valve, the
Two vacuum isolating valves, vacuum evacuation device vacuumize closed container, after vacuum values reach preset value in closed container, according to
Secondary closing the second vacuum isolating valve, the first vacuum isolating valve, the vacuum film rule are detected initial true in the standard chamber
Null value is P2, and after T time, the vacuum film rule are detected and record the standard vacuum value in standard chamber described in T time
For P1, the differential pressure value Δ P1 between the P1 and P2 is then the leakage value of standard vacuum；Described in the little differential pressure sensor detection
The indoor initial vacuum value of test chamber is P4, after T time, when the little differential pressure sensor detects and records T time described in
The indoor vacuum values of test chamber are P3, and the differential pressure value Δ P2 between the P3 and P4 is then the leakage value of detection chambers；It draws respectively
The pressure history in detection chambers and standard chamber is produced, the slip of detection chambers is obtained；The detection chambers are let out
The difference DELTA P of leakage value Δ P2 and the leakage value Δ P1 of the standard vacuum are the leakage value for detecting drug.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (3)
1. a kind of tightness testing method applies the seal degree of a sealing test system testing product, the sealing test system
Including closed container, vacuum evacuation device, detection device, PLC controller, the closed container has a detection chambers and standard chamber
Room, the detection chambers are connected to by the first vacuum isolating valve with the standard chamber, and the vacuum evacuation device is true by second
Empty isolating valve, is connected to the detection chambers, and the detection device is arranged in the closed container, and the detection device includes
Little differential pressure sensor, vacuum film rule, the little differential pressure sensor has positive and negative end, the little differential pressure sensor negative terminal, described
Vacuum film rule are arranged in the standard chamber, and the little differential pressure sensor anode is arranged in the detection chambers, elementary errors
Pressure sensor, vacuum film rule signal output end are electrically connected with the PLC controller；It is characterized in that, the sealing test
Method the following steps are included:
S1, drug to be detected is placed in detection chambers, closes detection chambers door, open first vacuum isolating valve, the
Two vacuum isolating valves, vacuum evacuation device vacuumize closed container；
S2, after vacuum values reach preset value in closed container, successively close the second vacuum isolating valve, the first vacuum isolating valve；
Wherein, it is P2 that the vacuum film rule, which detect the initial vacuum value in the standard chamber, described true after T time
It is P1, the differential pressure value between the P1 and P2 that empty film rule, which are detected and record the standard vacuum value in standard chamber described in T time,
Δ P1 is then the leakage value of standard vacuum；
It is P4 that the little differential pressure sensor, which detects the indoor initial vacuum value of test chamber, after T time, the differential pressure
It is P3, the differential pressure value Δ P2 between the P3 and P4 that sensor, which detects and records test chamber indoor vacuum values when T time,
It is then the leakage value of detection chambers；The difference of the leakage value Δ P1 of the leakage value Δ P2 and standard vacuum of the detection chambers
Δ P is the leakage value for detecting drug.
2. tightness testing method according to claim 1, which is characterized in that the sealing test system further includes a display
Device, the display device are electrically connected with the PLC controller, for showing the little differential pressure sensor, vacuum film rule inspection
Pressure history in the numerical value of survey and the drawn out detection chambers of the PLC controller and standard chamber.
3. tightness testing method according to claim 1, which is characterized in that the vacuum evacuation device includes the first vacuum
Pump, the second vacuum pump, third vacuum pump, first vacuum pump, the second vacuum pump, third vacuum pump are sequentially connected in series connection, institute
The first vacuum pump is stated to connect with second vacuum isolating valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610043823.1A CN105699026B (en) | 2016-01-22 | 2016-01-22 | A kind of sealing test system and tightness testing method |
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| CN201610043823.1A CN105699026B (en) | 2016-01-22 | 2016-01-22 | A kind of sealing test system and tightness testing method |
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| CN105699026A CN105699026A (en) | 2016-06-22 |
| CN105699026B true CN105699026B (en) | 2019-07-09 |
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Families Citing this family (6)
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| CN108267280A (en) * | 2016-12-30 | 2018-07-10 | 致茂电子(苏州)有限公司 | Air-tightness detection method and air-tightness detection device |
| CN107560804A (en) * | 2017-09-05 | 2018-01-09 | 上海肇民动力科技有限公司 | A kind of check valve air tightness detecting system and method |
| CN107907273B (en) * | 2017-10-27 | 2019-09-27 | 辽沈工业集团有限公司 | A kind of partially sealed outer surface air-tightness detection method of product |
| CN108387691B (en) * | 2018-04-02 | 2023-08-22 | 杭州赛威斯真空技术有限公司 | Material gassing rate testing arrangement that breathes in |
| CN111289188B (en) * | 2018-12-10 | 2022-04-19 | 广州敏达包装设备有限公司 | Non-contact vacuum detection method |
| CN113341863A (en) * | 2021-06-04 | 2021-09-03 | 广东鑫钻节能科技股份有限公司 | Efficient energy-saving vacuum system |
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