CN109425471A - Device for detecting sealability and method - Google Patents
Device for detecting sealability and method Download PDFInfo
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- CN109425471A CN109425471A CN201710754842.XA CN201710754842A CN109425471A CN 109425471 A CN109425471 A CN 109425471A CN 201710754842 A CN201710754842 A CN 201710754842A CN 109425471 A CN109425471 A CN 109425471A
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- positive pressure
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- connecting tube
- pressure
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 238000004806 packaging method and process Methods 0.000 claims abstract description 16
- 238000012360 testing method Methods 0.000 claims description 29
- 238000011156 evaluation Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 235000013305 food Nutrition 0.000 abstract description 7
- 239000000047 product Substances 0.000 description 56
- 238000001514 detection method Methods 0.000 description 34
- 239000007789 gas Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 5
- 230000003319 supportive effect Effects 0.000 description 5
- 239000000123 paper Substances 0.000 description 4
- 239000008267 milk Substances 0.000 description 3
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- 235000013336 milk Nutrition 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001364 causal effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000009658 destructive testing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000021056 liquid food Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000001044 red dye Substances 0.000 description 1
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- 239000012780 transparent material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- G01M3/36—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested
-
- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of device for detecting sealability and method, which includes: the sensing chamber for accommodating examined product, and the sensing chamber includes: the ontology with open end, and the sealing cover on the open end is arranged in by way of sealed connection；Positive pressure access, positive pressure access one end can connect compressed air gas source, and the other end is connected to the sensing chamber；Over-pressure control valve is provided on the positive pressure access；Negative pressure passage, described negative pressure passage one end can connect vacuum generator, and the other end is connected to the sensing chamber；Negative pressure control valve is provided in the negative pressure passage；The exhaust channel that can be connected to the sensing chamber.The present invention provides a kind of device for detecting sealability and method, can carry out non-damaged data for the food packaging centainly supported, improve precision and efficiency of detecting.
Description
Technical field
The present invention relates to food packaging sealing propertytest field, in particular to a kind of device for detecting sealability and method.
Background technique
Existing a kind of packaging for holding liquid food specifically includes that Tetra Pak, Kang Meibao, roof packet etc..Wherein
The major technique of Tetra Pak or Kang Meibao are: by Milk During Heating to more than 130 to 150 degrees Celsius, only keep several seconds just rapidly drop
To room temperature, then under the conditions of sealed, sterile, with six layers of plastic-aluminum combined sterilizable material of paper are filling, jacket forms.Roof packet is bar
A kind of packaging of family name's milk, is also fresh room, is a kind of paper plastic combined package, and shape is somewhat like closet, and the inside dress is Pasteur
Sterile milk, abbreviation Pasteur.
Above-mentioned several packagings all form scheduled shape using certain degree of hardness supporting layer (such as paper plastic-aluminum, paper).Due to
Such packaging has certain hardness using cardboard layer as support on the whole, and deformability is soft much smaller than common plastics
Packaging.
Currently, having the food packaging of support hardness for such, sealing propertytest is usually by manual operation.Artificial detection
Test method belong to destructive testing, after examined product damage, can not recycle, can only handle when waste, examine on the whole
It is larger to survey cost.In addition, current artificial detection means specifically include that cut packet observation test, conductance test, red dye test, it is molten
Solution test etc..On the whole, not only operating process is time-consuming, laborious, but also the accuracy of testing result is by the technical ability shadow of operator
Sound is larger, therefore testing result accuracy is relatively low.
To solve the above problems, it is necessary to propose a kind of non-destructive sealing inspection for the food packaging centainly supported
Survey technology can overcome influence of the factors such as hardness, deformation, the supportive of cardboard layer to its detection effect, improve detection accuracy
And efficiency.
Summary of the invention
The object of the present invention is to provide a kind of device for detecting sealability and methods, can be for the food centainly supported
Packaging carries out non-damaged data, improves precision and efficiency of detecting.
Following technical proposal can be used to realize in above-mentioned purpose of the invention:
A kind of device for detecting sealability, comprising:
For accommodating the sensing chamber of examined product, the sensing chamber includes: the ontology with open end, and is connected by sealing
The sealing cover on the open end is arranged in the mode connect；
Positive pressure access, positive pressure access one end can connect compressed air gas source, and the other end is connected to the sensing chamber；Institute
It states and is provided with over-pressure control valve on positive pressure access；
Negative pressure passage, described negative pressure passage one end can connect vacuum generator, and the other end is connected to the sensing chamber；It is described
Negative pressure control valve is provided in negative pressure passage；
The exhaust channel that can be connected to the sensing chamber.
In one preferred embodiment, the sensing chamber is also communicated with safety valve.
In one preferred embodiment, the positive pressure access, negative pressure passage, at least two accesses in exhaust channel
With at least partly public pipeline.
In one preferred embodiment, the device for detecting sealability is provided with the first connecting tube, the second connecting tube
With third connecting tube, wherein
The positive pressure access, negative pressure passage, exhaust channel share first connecting tube and the second connecting tube,
In one preferred embodiment, the safety valve is located between first connection and the second connecting tube.
In one preferred embodiment, one end of first connecting tube connects the sealing cover, other end connection
The safety valve；
One end of second connecting tube connects the safety valve, and the other end connects the vacuum generator, described the
It is parallel on the pipeline of two connecting tubes: over-pressure control valve, negative pressure control valve, positive pressure table, vacuum table, gas vent；
One end of the third connecting tube connects the over-pressure control valve, and the other end is for connecting the compressed air gas
Source；
The third connecting tube is parallel with the over-pressure control valve, the second connecting tube of positive pressure table, the cooperation of the first connecting tube
Form the positive pressure access；
It is parallel with the negative pressure control valve, the second connecting tube of vacuum table and first connecting tube and cooperatively forms described bear
Press access；
The second connecting tube and first connecting tube for being parallel with the gas vent cooperatively form the exhaust channel.
In one preferred embodiment, the device for detecting sealability further include: electrical with the over-pressure control valve
The positive pressure guard relay of connection, the negative pressure guard relay being electrically connected with the negative pressure control valve.
In one preferred embodiment, the device for detecting sealability further includes support platform, the support platform
Include: bracket, and top layer platform and two-layer platform on the bracket be set from top to bottom along short transverse, wherein
The bottom of the bracket is provided with rolling mechanism.
In one preferred embodiment, the device for detecting sealability further includes operation panel, is arranged in the operation
Start button and control module on plate, the control module and the start button, safety valve, over-pressure control valve, positive pressure
Table, negative pressure control valve, vacuum table, positive pressure guard relay, negative pressure guard relay are electrically connected.
In one preferred embodiment, the sensing chamber is by the transparent organic glass system with a thickness of 2 centimetres to 3 centimetres
At.
A kind of method for conducting leak test, comprising:
It is connected to positive pressure access, the positive pressure of predetermined positive pressure value is passed through into the sensing chamber for be placed with examined product；When reaching
After predetermined positive pressure duration, exhaust channel is opened, the sensing chamber is exhausted；
It is connected to negative pressure passage, the sensing chamber is vacuumized with the negative pressure of predetermined negative pressure value, when reaching predetermined negative
After pressing duration, the sensing chamber is restored to initial pressure state；
Based on the predetermined evaluation criterion of the examined product, judge whether the examined product is qualified, the predetermined evaluation mark
Standard includes: the recovery situation of leak case and packaging.
In one preferred embodiment, the predetermined positive pressure value is controlled by over-pressure control valve, described to make a reservation for just
Pressure duration is controlled by positive pressure guard relay, and the predetermined negative pressure value is by negative pressure control valve control, when the predetermined negative pressure
Length is controlled by negative pressure guard relay.
In one preferred embodiment, the predetermined positive pressure value be 2bar, the predetermined negative pressure value be-
70KPa, the predetermined positive pressure duration and predetermined negative pressure duration are 2 minutes.
The features and advantages of the invention are: logical by the way that the positive pressure access being connected to sensing chamber, negative pressure passage and exhaust is arranged
Road when detecting to examined product, can apply negative pressure from being switched fast to examined product application positive pressure, or quickly
Application positive pressure is switched to from applying negative pressure to examined product, especially for the Kang Mei that certain support hardness, deformability are poor
The similar products such as packet, Tetra Pak, the detection mode that positive pressure is superimposed with negative pressure overcome the factors such as cardboard hardness, deformation, supportive
Influence to its detection effect can quickly make examined product leakage, deformation and restore to the original state, substantially increase the accurate of detection
Property and detection efficiency.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of device for detecting sealability in the application embodiment；
Fig. 2 is a kind of step flow chart of method for conducting leak test in the application embodiment；
Description of symbols:
Support platform -1；Two-layer platform -2；Universal wheel -3；Sensing chamber -4；Sealing cover -5；Vacuum generator -6；Operation panel-
7；Positive pressure guard relay -8；Negative pressure guard relay -9；Start switch -10；Second connecting tube -11；Gas vent -12；Third
Connecting tube -13；Positive pressure table -14；Vacuum table -15；Safety valve -16；Negative pressure control valve -17；First connecting tube -18；Sample storage device-
19；Product -20 to be detected；Testing product -21；Over-pressure control valve -22.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, elaborate to technical solution of the present invention, it should be understood that these
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention, after the present invention has been read, this field skill
Art personnel each fall in the application range as defined in the appended claims the modification of various equivalent forms of the invention.
Method for conducting leak test described herein and device are described in detail with reference to the accompanying drawing.Fig. 2 is this
Apply for the flow chart for the method for conducting leak test that an embodiment provides.Although this application provides such as following embodiments or
Method operating procedure shown in the drawings or apparatus structure, but based on routine or without creative labor in the method or dress
It may include more or less operating procedure or modular structure in setting.There is no necessary causal steps in logicality
In rapid or structure, the execution that the execution sequence of these steps or the modular structure of device are not limited to the offer of the application embodiment is suitable
Sequence or modular structure.It, can be according to reality when the device in practice or end product of the method or modular structure execute
It applies mode or method shown in the drawings or modular structure connection carry out sequence execution or parallel executes (such as parallel processor
Or the environment of multiple threads).
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", "upper",
"lower", "left", "right" and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
Any and all combinations of relevant listed item.
The present invention provides a kind of device for detecting sealability and method, can carry out for the food packaging centainly supported
Non-damaged data improves precision and efficiency of detecting, while can reduce testing cost.
Referring to Fig. 1, a kind of device for detecting sealability is provided in the application embodiment, and the apparatus may include: it is used for
The sensing chamber 4 of examined product is accommodated, the sensing chamber 4 includes: the ontology with open end, and is set by way of sealed connection
Set the sealing cover 5 on the open end；Positive pressure access, positive pressure access one end can connect compressed air gas source, the other end
It is connected to the sensing chamber 4；Over-pressure control valve 22 is provided on the positive pressure access；Negative pressure passage, described negative pressure passage one end
Vacuum generator 6 can be connected, the other end is connected to the sensing chamber 4；Negative pressure control valve 17 is provided in the negative pressure passage；Energy
The exhaust channel being connected to the sensing chamber 4.
In the present embodiment, sensing chamber 4 is for accommodating examined product.The sensing chamber 4 includes: with open end sheet
Body, with opposite top and bottom.Wherein, the upper end of the ontology is open end, and the ontology lower end is closed end.Institute
Open end is stated for being put into or taking out examined product.When being checked, set by way of sealed connection on the open end
It is equipped with sealing cover 5.Specifically, the ontology of the sensing chamber 4 can be in hollow tubbiness, certainly, the ontology of the sensing chamber 4 is also
It can be other shapes, the application does not make specific limit herein.
In the present embodiment, the opening end position of 4 body upper part of sensing chamber is arranged in the sealing cover 5.It is described
It is provided with sealing ring between sealing cover 5 and the ontology, realizes that the cooperation of the two seals by the sealing ring.When the detection
When the ontology of room 4 is in hollow tubbiness, the sealing cover 5 can be whole rounded.Certainly, the shape of the sealing cover 5 is not
It is limited to the example above, can be adaptively adjusted according to the difference of the 4 body open end shape of sensing chamber, specifically,
The application does not make specific limit herein.
In order to which convenient for observing examined product, the sensing chamber 4 can be made of transparent material when detecting.Tool
Body, the sensing chamber 4 can be made of the transparent organic glass (PMMA) with a thickness of 2 centimetres to 3 centimetres.When the sensing chamber
After 4 with a thickness of 2 centimetres to 3 centimetres of transparent organic glass by being made, observation requirements can not only be met, and can satisfy strong
Degree needs, and when guarantee is pressurizeed or vacuumized to the sensing chamber 4, which has enough endurance.
In one embodiment, the device for detecting sealability can also include sample storage device 19.The sample storage device 19 is used
In placement detected product.Specifically, the sample storage device 19 can be can to provide the pedestal of support, the bottom for detected product
The accommodating chamber with certain altitude is formed in seat.When detected product is revealed when detecting, the liquid that leaks out can be with
It is accommodated by the accommodating chamber, prevents from polluting sensing chamber 4.
In one embodiment, the device for detecting sealability further includes support platform 1.The sensing chamber 4 can position
In in the support platform 1.The support platform 1 has certain height, when the sensing chamber 4 is located at the support platform 1
After upper, it can be observed and be operated in order to subsequent.
Specifically, the support platform 1 may include: bracket, and it is arranged in from top to bottom along short transverse described
Top layer platform and two-layer platform 2 on bracket.Wherein, the bottom of the bracket is provided with rolling mechanism.
The bracket is the supporting mechanism with certain altitude, specifically, it may include the consistent support of multiple height
Leg, and the crossbeam of the connection supporting leg.Certainly, the concrete form of the bracket is not limited to the example above, and the application exists
This does not make specifically to limit.
The top layer platform is erected at the top of the supporting mechanism, is used to provide placement platform for sensing chamber 4 etc..
The two-layer platform 2 is erected on the supporting mechanism, and be located at the top layer platform lower section, be used for for
Testing product 20 and testing product 21, which provide, places platform.Specifically, the two-layer platform 2 may include two regions, one
A region is that product 20 to be detected places area, another region is that testing product 21 has placed area.
In order to improve the mobile convenience of support platform 1, rolling mechanism can be set in the bottom of the bracket, so that institute
Stating support platform 1 becomes the platform of packaged type.Specifically, the rolling mechanism can be in the setting of the supporting leg end of bracket
Universal wheel 3.
In present embodiment, positive pressure access is for providing the positive pressure of predetermined pressure into the sensing chamber 4.Specifically, institute
Positive pressure access is stated with opposite both ends, one end can connect compressed air gas source, and the other end can be connected with the sensing chamber 4
It is logical.Wherein, the compressed air gas source is capable of providing oil-free anhydrous filtered compressed air.The positive pressure access and sensing chamber
4 connection cooperation position can be located on the ontology of the sensing chamber 4, can also be located on sealing cover 5.Preferably, described close
Capping 5 can whole rounded tabular, an aperture is provided on the sealing cover 5 of the circular plate, for connecting
State one end of positive pressure access.
Over-pressure control valve 22 is provided on the positive pressure access, the over-pressure control valve 22 is empty for controlling the compression
The positive pressure that gas gas source is supplied to the sensing chamber 4 meets preset pressure requirements.For example, the preset sensing chamber
Pressure value in 4 is 2bar.After being then adjusted by the over-pressure control valve 22, so that being supplied to the sensing chamber 4 just
Pressure is at or about 2bar.
In the present embodiment, negative pressure passage is for vacuumizing the sensing chamber 4, so that in the sensing chamber 4
Form the negative pressure of predetermined pressure.Specifically, the negative pressure passage has opposite both ends, one end can connect vacuum generator 6,
The other end can be connected with the sensing chamber 4.
Specifically, the connection cooperation position of the negative pressure passage and sensing chamber 4 can be located at the ontology of the sensing chamber 4
On, it can also be located on sealing cover 5.Preferably, the sealing cover 5 can whole rounded tabular, in the round plate
It is provided with an aperture on the sealing cover 5 of shape, for connecting one end of the negative pressure passage.Wherein, the positive pressure access and negative pressure
On the one hand the aperture that access is connected to the sealing cover 5 can reduce the aperture on the sealing cover 5 to be same
On the other hand number is also beneficial to improve the reliability that the sensing chamber 4 seals.
Negative pressure control valve 17 is provided in the negative pressure passage, the negative pressure control valve 17 is for controlling the vacuum hair
The negative pressure that raw device 6 is supplied to the sensing chamber 4 meets preset pressure requirements.For example, the preset sensing chamber 4
Interior pressure value is -70KPa.After being then adjusted by the negative pressure control valve 17, so that being supplied to the negative of the sensing chamber 4
Pressure is approximately equal to or is equal to -70KPa.
In the present embodiment, exhaust channel is used to for the gas in the sensing chamber 4 being discharged.Specifically, the exhaust
Access can be the gas vent 12 being connected to by connecting tube with the sensing chamber 4.Control can be set on the gas vent 12
The switching device for making 12 on-off of gas vent, when needing that the sensing chamber 4 is exhausted, the switching device is opened.
Under a specific application scenarios, when the positive pressure for being passed through predetermined pressure to the sensing chamber 4, need to switch to logical negative
It presses (vacuumizing), and during vacuumizing, the gas vent 12 is in the open state, to will test the gas in room 4
Discharge.
In the present embodiment, the device for detecting sealability can also include safety valve 16, the safety valve 16 and institute
It states sensing chamber 4 to be connected, is used for the real-time guard device for detecting sealability, when the pressure in the sensing chamber 4 is more than preset
When safe pressure, the safety valve 16 can will test room 4 and extraneous pressure supply route disconnects, or can be to the sensing chamber
4 carry out pressure release.Specifically, the safety valve 16 can be connected to by individual connecting tube with the sensing chamber 4.Certainly, described
Safety valve 16 also be can be set or be connected in parallel on any one access in positive pressure access, negative pressure passage or exhaust channel, from
And simplify the pipeline of package seal checker.
In one embodiment, in order to simplify the pipeline structure of package seal checker, the positive pressure access, negative pressure are logical
At least two accesses in road, exhaust channel have at least partly public pipeline.Specifically, the device for detecting sealability setting
There are the first connecting tube 18, the second connecting tube 11 and third connecting tube 13, wherein the positive pressure access, negative pressure passage, exhaust channel
Share first connecting tube 18 and the second connecting tube 11.In addition, the safety valve 16 can be located at first connection and the
Between two connecting tubes 11.
In the present embodiment, positive pressure access, negative pressure passage, exhaust channel 18 and of the first connecting tube has all been shared into
Second connecting tube 11, enormously simplifies entire pipeline structure, improves the reliability of entire device for detecting sealability, when positive pressure is logical
When road, negative pressure passage, exhaust channel all share first connecting tube 18, the sealing is connected by first connecting tube 18
Lid 5 need to only open up an aperture on the sealing cover 5.
In the present embodiment, when safety valve 16 is arranged between the first connection and the second connecting tube 11, due to its position
It, can be under free position, to detection on the public pipeline that positive pressure access, negative pressure passage, exhaust channel are connected to sensing chamber 4
It is protected room 4.
In a specific embodiment, one end of first connecting tube 18 connects the sealing cover 5, and the other end connects
Connect the safety valve 16.One end of second connecting tube 11 connects the safety valve 16, and the other end connects the vacuum and occurs
Device 6.It is parallel on the pipeline of second connecting tube 11: over-pressure control valve 22, negative pressure control valve 17, positive pressure table 14, negative pressure
Table 15, gas vent 12.One end of the third connecting tube 13 connects the over-pressure control valve 22, and the other end is for connecting the pressure
Contracting air gas source.The third connecting tube 13 is parallel with the over-pressure control valve 22, the second connecting tube 11 of positive pressure table 14,
One connecting tube 18 cooperatively forms the positive pressure access.It is parallel with the second connecting tube 11 of the negative pressure control valve 17, vacuum table 15
The negative pressure passage is cooperatively formed with first connecting tube 18.Be parallel with the second connecting tube 11 of the gas vent 12 with it is described
First connecting tube 18 cooperatively forms the exhaust channel.On the whole, so that the pipeline integrated level of entire device for detecting sealability is big
It is big to improve, so that the reliability of detection is also accordingly improved.
In one embodiment, the device for detecting sealability can also include: electrical with the over-pressure control valve 22
The positive pressure guard relay 8 of connection, the negative pressure guard relay 9 being electrically connected with the negative pressure control valve 17.
It in the present embodiment, can be by the way that the positive pressure guard relay 8 being electrically connected with over-pressure control valve 22, essence be arranged
It really controls and is delayed the retention time to the positive pressure that sensing chamber 4 inputs.Likewise, being electrically connected by setting and negative pressure control valve 17
Negative pressure guard relay 9, accurately control the negative pressure delay retention time vacuumized to sensing chamber 4.Pass through guard relay
Control delay the retention time mode can not only submission time control accuracy, can also improve the automatization level of detection,
Improve the precision of detection.
Specifically, can use the positive pressure guard relay 8 when applying negative pressure after applying positive pressure to sensing chamber 4 in the ban
Control is just being depressed into the time of negative pressure switching, that is to say, that 8 retention time of positive pressure guard relay to point can be used as and open
The switching signal of dynamic negative pressure passage.Likewise, can use described negative when applying positive pressure after applying negative pressure to sensing chamber 4 in the ban
Pressure guard relay 9 controls the time that negative pressure switches to positive pressure, that is to say, that 9 retention time of negative pressure guard relay arrives
Point can be used as starting positive pressure access switching signal.
In the present embodiment, the device for detecting sealability is also provided with operation panel 7.The positive pressure keeps relay
Device 8 and negative pressure guard relay 9 can be set on operation panel 7.In addition, be also provided on the operation panel 7 starting by
Button.In addition, control module is also provided on the operation panel 7 of device for detecting sealability, the control module and the starting
Button, over-pressure control valve 22, positive pressure table 14, negative pressure control valve 17, vacuum table 15, positive pressure guard relay 8, is born safety valve 16
Guard relay 9 is pressed to be electrically connected.After start button receives enabling signal, the control module starts the safety valve
16, over-pressure control valve 22；When the pressure value of positive pressure table 14 reaches predetermined positive pressure value, start positive pressure guard relay 8；When prolonging
When keep being connected to exhaust channel, starting negative pressure control valve 17, vacuum hair after positive pressure guard relay 8 reaches predetermined positive pressure duration
Raw device 6；When the pressure value of vacuum table 15 reaches predetermined negative pressure value, start negative pressure guard relay 9；When delay keeps negative pressure
After holding and nitrogen reach predetermined negative pressure duration, passes through exhaust channel and restore device for detecting sealability pressure balance, leakproofness inspection
Device is surveyed to restore to original state.
In the application embodiment, by the way that the positive pressure access, negative pressure passage and the exhaust channel that are connected to sensing chamber 4 is arranged,
When being detected to examined product, can to examined product apply positive pressure be switched fast for apply negative pressure, or quickly by
Apply negative pressure to examined product and switch to application positive pressure, especially for the poor Kang Meibao of certain support hardness, deformability,
The similar products such as Tetra Pak, the detection mode that positive pressure is superimposed with negative pressure overcome the factors such as cardboard hardness, deformation, supportive to it
The influence of detection effect, can quickly make examined product leakage, deformation and restore to the original state, substantially increase detection accuracy and
Detection efficiency.
Referring to Fig. 2, additionally providing a kind of sealing propertytest side for device for detecting sealability in the application embodiment
Method, this method may include steps of:
Step S10: connection positive pressure access is being passed through predetermined positive pressure value into the sensing chamber for be placed with examined product just
Pressure；After reaching predetermined positive pressure duration, exhaust channel is opened, the sensing chamber is exhausted；
Step S12: connection negative pressure passage vacuumizes the sensing chamber with the negative pressure of predetermined negative pressure value, when reaching
To after predetermined negative pressure duration, the sensing chamber is restored to initial pressure state；
Step S14: being based on the predetermined evaluation criterion of the examined product, judge whether the examined product is qualified, described pre-
Determine the recovery situation that evaluation criterion includes: leak case and packaging.
In the present embodiment, specific entity structure part is referred to the tool of the package seal checker embodiment
Body description, details are not described herein by the application.
In the present embodiment, step S10 and the sequence of step S12 can be interchanged.That is, can be first to sensing chamber
4 apply positive pressure, then apply negative pressure, first can also apply negative pressure to sensing chamber 4, then apply positive pressure, specifically, the application exists
This does not make specifically to limit.
Wherein, the predetermined positive pressure value is controlled by over-pressure control valve 22, and the predetermined positive pressure duration is protected by positive pressure
The control of relay 8 is held, the predetermined negative pressure value is controlled by negative pressure control valve 17, and the predetermined negative pressure duration is kept by negative pressure
Relay 9 controls.
Specifically, the predetermined positive pressure value can be 2bar, 1 bar (bar)=100 kPa of (KPa)=10 newton/square
Centimetre=0.1MPa.The predetermined negative pressure value can be -70KPa.The predetermined positive pressure value and predetermined negative pressure value it is big
Small to be chosen with making applicability according to the difference of examined product, specific the application does not make specific limit herein.Example
Such as, for the product of leakproofness qualification, be corresponding with a limiting damage pressure, be more than the pressure after, even leakproofness close
The product of lattice can also leak.The predetermined pressure is referred to the limiting damage pressure and carries out degradation setting.
The predetermined positive pressure duration and predetermined negative pressure duration can be 2 minutes (min).Certainly, the predetermined positive pressure duration
Can be different from predetermined negative pressure duration, the predetermined positive pressure duration or the predetermined negative pressure duration can be according to examined products
Actual conditions, such as actual detection effect, make applicability adjustment, specifically, the application does not make specific limit herein.
Detection mode of the positive pressure provided in the application embodiment in conjunction with negative pressure, using positive pressure from export-oriented examined product
Pressurization, positive pressure, which applies, to be terminated quickly to switch to apply negative pressure, and negative pressure discharges examined product internal pressure outward, positive pressure and negative pressure phase
In conjunction with making quickly to be examined with similar products sealing performances such as certain support hardness, deformability poor Kang Meibao, Tetra Paks
It measures and, overcome influence of the factors such as cardboard hardness, deformation, supportive to its detection effect, can quickly make examined product
Leakage, deformation and reinstatement, substantially increase the accuracy and detection efficiency of detection.
Under a specific application scenarios, examined using the being sealed property of device for detecting sealability of herein described offer
When survey, device for detecting sealability can be moved to bottling department area to be checked, third connecting tube 13 is connected on gas source, connection is set
Stand-by power source, take testing product to be placed on product 20 to be detected from production line from it is to be checked.Setting positive pressure is kept according to the actual situation
Relay 8,9 retention time of negative pressure guard relay are 2min, and 14 pressure of positive pressure table with display with control function is arranged
15 negative pressure value-the 70KPa of vacuum table with display with control function is arranged in value 2bar.Product to be checked is put into sample storage device 19
After be put into sensing chamber 4, cover tightly sealing cover 5, tighten fixation clamp, press and start switch 10, equipment starts automatically, compressed air warp
Cross over-pressure control valve 22, positive pressure table 14 enters sensing chamber 4.After pressure reaches positive pressure 14 setting value of table, the output letter of positive pressure table 14
Number give positive pressure guard relay 8, delay is kept after positive pressure guard relay 8 reaches setting time, and gas vent 12 is vented, negative pressure control
Valve 17 processed starts, and vacuum generator 6 starts, and vacuum table 15 outputs signal to negative pressure guard relay 9 after reaching setting value, is delayed
After keeping negative pressure guard relay 9 to reach setting time, 12 recovery system pressure balance of gas vent, equipment restPoses.
Observation sensing chamber 4 in product whether reveal, whether backpack body resilient.Testing product occurs revealing or backpack body cannot restore
It is unqualified that original state is considered as product hermeticity, and testing product is without leakage and backpack body can restore to the original state and be considered as product hermeticity qualification.
It has detected product to be placed at testing product 21, in case processing or its use.
In addition, there is the food packaging centainly supported: Kang Meibao and Tetra Pak, the application for what is be commonly used
Also by positive pressure+negative pressure embodiment and existing manual detection mode, and individually apply what positive pressure or negative pressure were detected
Mode compares test, specifically please refers to following Tables 1 and 2s.Wherein, table 1 is the comparative test number for Kang Meibao
According to table 2 is the comparative test data for Tetra Pak.PPM indicates a few millionths in table.
, it is apparent that carrying out positive pressure+negative using device for detecting sealability provided by the present application from two contrast tables
The detection method being quickly converted is pressed, can rapidly identify the leakproofness of examined product, detection essence within the very short time
Degree and detection efficiency are greatly improved.
Specifically, positive pressure+negative pressure technical solution provided herein first is when implementing, relative to existing artificial
For mode detects, it can be clearly seen that, detection time can be greatly shortened, testing cost is reduced, improves detection accuracy, is reduced
The operation difficulty and intensity of operator improves detection efficiency.
Due to interpretation leakproofness whether He Ge judgment basis are as follows: product without leakage and quickly restore to the original state.
For positive pressure or negative pressure individually apply pressure to Kang Meibao or Tetra Pak the case where, since there is certain support hardness, become
Shape ability poor Kang Meibao or Tetra Pak are objectively not easy intuitively to judge whether examined product is deposited unidirectionally when pressure
In the underproof problem of leakproofness.In order to by individually apply positive pressure or negative pressure in the way of judge Kang Meibao or Tetrapack
Packet or similar packaging whether there is sealing problem, then need by extending the time that presses.Described in table as above, usually individually
The mode for applying positive pressure or negative pressure is positive pressure and more than twice of negative pressure stacked system.It can be seen that the independent mode for applying positive pressure or negative pressure
Relative to the mode that positive pressure provided by the present application is superimposed with negative pressure, not only increases detection time, increases testing cost, and
And bottom pour ladle recall rate and accuracy rate are relatively low.
Detection mode of the positive pressure provided in the application embodiment in conjunction with negative pressure, using positive pressure from export-oriented examined product
Pressurization, positive pressure, which applies, to be terminated quickly to switch to apply negative pressure, and negative pressure discharges examined product internal pressure outward, positive pressure and negative pressure phase
In conjunction with making quickly to be examined with similar products sealing performances such as certain support hardness, deformability poor Kang Meibao, Tetra Paks
It measures and, overcome influence of the factors such as cardboard hardness, deformation, supportive to its detection effect, can quickly make examined product
Leakage, deformation and reinstatement, substantially increase the accuracy and detection efficiency of detection.
Above-mentioned each embodiment in this specification is described in a progressive manner, identical between each embodiment
Similar portion is cross-referenced, and what each embodiment stressed is and other embodiments difference.
The foregoing is merely several embodiments of the invention, although disclosed herein embodiment it is as above, institute
Content is stated only to facilitate the embodiment for understanding the present invention and using, is not intended to limit the present invention.Any institute of the present invention
Belong to those skilled in the art, do not depart from disclosed herein spirit and scope under the premise of, can be in embodiment
Formal and details on make any modification and variation, but scope of patent protection of the invention, still must be with appended claims
Subject to the range that book is defined.
Claims (13)
1. a kind of device for detecting sealability characterized by comprising
For accommodating the sensing chamber of examined product, the sensing chamber includes: the ontology with open end, and passes through sealed connection
The sealing cover on the open end is arranged in mode；
Positive pressure access, positive pressure access one end can connect compressed air gas source, and the other end is connected to the sensing chamber；It is described just
Over-pressure control valve is provided on pressure access；
Negative pressure passage, described negative pressure passage one end can connect vacuum generator, and the other end is connected to the sensing chamber；The negative pressure
Negative pressure control valve is provided on access；
The exhaust channel that can be connected to the sensing chamber.
2. device for detecting sealability as described in claim 1, which is characterized in that the sensing chamber is also communicated with safety valve.
3. device for detecting sealability as claimed in claim 2, which is characterized in that the positive pressure access, negative pressure passage, exhaust are logical
At least two accesses in road have at least partly public pipeline.
4. device for detecting sealability as claimed in claim 3, which is characterized in that the device for detecting sealability is provided with first
Connecting tube, the second connecting tube and third connecting tube, wherein
The positive pressure access, negative pressure passage, exhaust channel share first connecting tube and the second connecting tube.
5. device for detecting sealability as claimed in claim 4, which is characterized in that the safety valve be located at it is described first connection with
Between second connecting tube.
6. device for detecting sealability as claimed in claim 5, which is characterized in that
One end of first connecting tube connects the sealing cover, and the other end connects the safety valve；
One end of second connecting tube connects the safety valve, and the other end connects the vacuum generator, connects described second
It is parallel on the pipeline of adapter tube: over-pressure control valve, negative pressure control valve, positive pressure table, vacuum table, gas vent；
One end of the third connecting tube connects the over-pressure control valve, and the other end is for connecting the compressed air gas source；
The third connecting tube is parallel with the over-pressure control valve, the second connecting tube of positive pressure table, the first connecting tube and cooperatively forms
The positive pressure access；
It is parallel with the negative pressure control valve, the second connecting tube and first connecting tube of vacuum table cooperatively form the negative pressure and lead to
Road；
The second connecting tube and first connecting tube for being parallel with the gas vent cooperatively form the exhaust channel.
7. the device for detecting sealability as described in claim 1 to 6 is any, which is characterized in that further include: with the over-pressure control
The positive pressure guard relay that valve is electrically connected, the negative pressure guard relay being electrically connected with the negative pressure control valve.
8. device for detecting sealability as claimed in claim 7, which is characterized in that further include operation panel, be arranged in the operation
Start button and control module on plate, the control module and the start button, safety valve, over-pressure control valve, positive pressure
Table, negative pressure control valve, vacuum table, positive pressure guard relay, negative pressure guard relay are electrically connected.
9. device for detecting sealability as described in claim 1, which is characterized in that it further include support platform, the support platform
Include: bracket, and top layer platform and two-layer platform on the bracket be set from top to bottom along short transverse, wherein
The bottom of the bracket is provided with rolling mechanism.
10. device for detecting sealability as described in claim 1, which is characterized in that the sensing chamber is by with a thickness of 2 centimetres to 3
Centimetre transparent organic glass be made.
11. a kind of method for conducting leak test characterized by comprising
It is connected to positive pressure access, the positive pressure of predetermined positive pressure value is passed through into the sensing chamber for be placed with examined product；It is predetermined when reaching
After positive pressure duration, exhaust channel is opened, the sensing chamber is exhausted；
It is connected to negative pressure passage, the sensing chamber is vacuumized with the negative pressure of predetermined negative pressure value, when reaching predetermined negative pressure
After length, the sensing chamber is restored to initial pressure state；
Based on the predetermined evaluation criterion of the examined product, judge whether the examined product is qualified, the predetermined evaluation criterion packet
It includes: the recovery situation of leak case and packaging.
12. method for conducting leak test as claimed in claim 11, which is characterized in that the predetermined positive pressure value passes through just voltage-controlled
Valve control processed, the predetermined positive pressure duration are controlled by positive pressure guard relay, and the predetermined negative pressure value passes through negative pressure control valve
Control, the predetermined negative pressure duration are controlled by negative pressure guard relay.
13. method for conducting leak test as claimed in claim 12, which is characterized in that the predetermined positive pressure value is 2bar, institute
Stating predetermined negative pressure value is -70KPa, and the predetermined positive pressure duration and predetermined negative pressure duration are 2 minutes.
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| CN201710754842.XA CN109425471A (en) | 2017-08-29 | 2017-08-29 | Device for detecting sealability and method |
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| CN201710754842.XA CN109425471A (en) | 2017-08-29 | 2017-08-29 | Device for detecting sealability and method |
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| CN116929667A (en) * | 2023-09-14 | 2023-10-24 | 扬州雄鸡电池有限公司 | Bidirectional nondestructive air tightness detection device and method for battery pack |
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