CN100592078C - Method for detecting baffle film leakage rate for vacuum heat insulation board - Google Patents
Method for detecting baffle film leakage rate for vacuum heat insulation board Download PDFInfo
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- CN100592078C CN100592078C CN200610122868A CN200610122868A CN100592078C CN 100592078 C CN100592078 C CN 100592078C CN 200610122868 A CN200610122868 A CN 200610122868A CN 200610122868 A CN200610122868 A CN 200610122868A CN 100592078 C CN100592078 C CN 100592078C
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- stainless steel
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- 238000000034 method Methods 0.000 title abstract description 9
- 238000009413 insulation Methods 0.000 title description 3
- 239000001307 helium Substances 0.000 claims abstract description 35
- 229910052734 helium Inorganic materials 0.000 claims abstract description 35
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 18
- 239000010935 stainless steel Substances 0.000 claims description 18
- 230000004888 barrier function Effects 0.000 claims description 7
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 description 9
- 239000011162 core material Substances 0.000 description 5
- 239000007767 bonding agent Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000012784 inorganic fiber Substances 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 238000006424 Flood reaction Methods 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000001819 mass spectrum Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Abstract
The leakage rate detecting method for VIP obstructing film includes the following steps: setting the film on the workpiece stage and sealing the upper part; setting the test bench in detection position; starting the vacuum pump to vacuumize to below 20 Pa; beginning lead detection while setting the leakage rate in zero point; spray helium to the film surface and observing the reading number change, recording the obviously raised reading number as the leakage rate; or, covering the bench with spread film, and injecting helium to obtain the leakage rate.
Description
Technical field
The present invention relates to a kind of barrier film that is used for vacuum heat-insulating plate (VIP plate), especially relate to a kind of baffle film leakage rate detection method of the VIP of being used for plate.
Background technology
The VIP plate is a kind of heat insulating material, generally is with core (glass, PF, PU, SIO
2, SIC etc.) air taken out in the bag of the packaging bag of packing into (by PE, PET, PA, EVOH, PVDC, LDPE, film and the compound compositions of aluminium foil such as PA) forms, so packaging bag must possess the function of good obstruct all gases.The method of existing detection baffle film leakage rate comprises: the detection method (using ASTMF1249) of detection method of OTR oxygen transmission rate (GB GB1038) and moisture-vapor transmission.These methods mostly are used for detecting the packaging for foodstuff laminated film, and its measuring accuracy is lower.And will reach 10～15 years the serviceable life that the VIP plate requires, and needs to set up the method for very sensitive detection baffle film leakage rate.
Toshiba Corporation and Toshiba AVE Co., Ltd disclose a kind of adiabatic framework in publication number is the application for a patent for invention of CN1132346, the shell body that combines by interior case and outer container, be folded in the polylith vacuum heat-insulating plate between this interior case and the outer container, the thermal insulation material beyond the vacuum heat-insulating plate; Above-mentioned vacuum heat-insulating plate be the air impermeability packing timber the resettlement section in filling the thermal insulation material and discharging the airtight shape plate that the air in this resettlement section forms; Thermal insulation material beyond the above-mentioned vacuum heat-insulating plate is filled in being provided with in the vacuum heat-insulating plate spatial portion in addition between above-mentioned interior case and the outer container.
Owens Corning Corp discloses a kind of method of producing thermal isolating form in publication number is the application for a patent for invention of CN1295917, its step has: continuously vacuum heat-insulating plate is passed to a shaping die; Fill between the two adjacent vacuum insulation panels joint at interval with form one comprise above-mentioned vacuum heat-insulating plate roughly be continuous inner core; The edge of filling above-mentioned vacuum heat-insulating plate roughly is continuous lateral margin roughly to be on the continuous inner core above-mentioned, to form; Fibrous reinforcement is placed in the compound to constitute on the above-mentioned outside surface that roughly is continuous inner core; Strengthen material with thermoplastic resin-impregnated fibers; Move past above-mentioned shaping die to produce a continuous long piece of thermal isolating form by above-mentioned compound material; Cut off the continuous long piece of above-mentioned continuous insulation template to make the thermal isolating form of at least a size with joint interval in selected filling.
Hitachi Domestic Electrical Appliance Co discloses a kind of manufacture method of vacuum heat-insulating plate in publication number is the application for a patent for invention of CN1603674, thereby it is a manufacture method of making vacuum heat-insulating plate by the adhesion that makes inorganic fibers dip bonding agent increasing core material, after making described inorganic fibers soak into bonding agent, has the drying process that reduces the moisture that floods simultaneously with bonding agent in the described inorganic fibers.
Summary of the invention
The objective of the invention is to shortcomings such as the measuring accuracy that exists at the method for existing detection baffle film leakage rate and sensitivity is lower, provide a kind of barrier film that is used for vacuum heat-insulating plate to comprise the detection method of sheet laminated film and packaging bag leak rate.
Be used for the detection method of the sheet laminated film leak rate of vacuum heat-insulating plate, its concrete steps are:
1) film of size greater than 250mm * 350mm lain on the work stage of the vacuum chamber of making aperture, the silicon rubber loop sealing is arranged around the work stage, the film top compresses film the purpose that reaches sealing with stainless steel framework;
2) open general supply, vacuum meter shows normal, makes the right working position of test board be in detecting position;
3) start mechanical pump, press the right shutdown valve of leak locator, the test board right working position is found time, vacuum tightness is less than 20Pa;
4) open right leak detector valve, close right shutdown valve, leak locator begins leak detection;
5) leak rate shows zero point: in " referance leak " closed condition, regulate " fine zero " or " coarse zero " and make leak rate be presented at the sensitiveest shelves (* 10
-10) be about 0.5, and note initial reading;
6) spray helium and observe the demonstration of leak locator to film surface with the helium spray gun, if reading obviously rises, to a certain numerical example as 9 * 10
-7Pam
3L/S, then this reading deducts initial reading and is leak rate, if reading does not have significant change, then continues the operation of next step;
7) the helium cover with stainless steel covers on the work stage of the vacuum chamber of making aperture that is covered with film, O-ring seal and work stage sealing are arranged at the helium cover bottom of stainless steel, inject helium from the aperture at the helium cover top of stainless steel, then aperture is blocked, write down initial time and observe the demonstration of leak locator, if show to rise to a certain numerical value, this reading is deducted initial reading and divided by being leak rate interval time.
Checkout equipment comprises leak locator and auxiliary detection platform two parts, leak locator can adopt helium mass spectrometer leak detector, two stations are arranged on the table top of auxiliary detection platform, and right working position detects the sheet film sample, and left station detects the packaging bag sample that the Standard standard is of a size of diameter 350mm～550mm.
Be used for the detection method of the packaging bag leak rate of vacuum heat-insulating plate, its concrete steps are:
1) be that the packaging bag Sample sleeve of diameter 350mm～550mm is on the stainless steel perforate framework of auxiliary detection platform with standard size;
2) bottom of stainless steel perforate framework is the sealing surface that the angle of inclination is arranged, and the stainless steel sealing ring of same slope is compressed sealing by silicon rubber loop with the plastics sack;
3) open general supply, vacuum meter shows normal, makes the left station of test board be in detecting position;
4) start mechanical pump, press the left shutdown valve of leak locator, left station is found time, vacuum tightness is less than 20Pa;
5) open left leak detector valve, close left shutdown valve, leak locator begins leak detection;
6) leak rate shows zero point: in " referance leak " closed condition, regulate " fine zero " or " coarse zero " and make leak rate be presented at the sensitiveest shelves (* 10
-10) be about 0.5, and note initial reading;
7) use the helium spray gun to barrier film bag surface injection helium from top to bottom, and observe the demonstration of leak locator, obviously rise, arrive a certain numerical example as 9 * 10 as reading
-7Pam
3This reading of L/S deducts initial reading and is leak rate, if reading does not have obvious variation, and the operation below then continuing;
8) with a big polybag whole measured workpiece cover is got up and the end of polybag is tied up, open an aperture from above, squeeze into helium from aperture, and the polybag aperture tied, observe the seepage situation of helium to the Obstruct membrane pocket, write down initial time simultaneously, if the leak locator reading changes, reading constantly increases, and reading under the stable reading postscript deducts initial reading with this reading and divided by being leak rate interval time.
Compare with the method for existing detection baffle film leakage rate, the present invention has following outstanding advantage:
1. easy to detect, quick, accurate, reliable.
2. detection sensitivity height: the VIP plate of a 45cm * 28cm * 2.5cm for example, its volume V is 3.15L, requiring serviceable life is 10 years, and these data substitution following formulas are obtained the maximum leak rate Q that allows:
Q＝(P
2-P
1)V/t
＝(100-1)3.15/10×365×24×3600
＝3.12×10
3/3.15×10
8
＝9.9×10
-5Pa.L/s
In the formula, P
1: initial depression (unit: Pa); P
2: the life-span vacuum tightness (unit: Pa) at the end; Maximum leak rate (the unit: Pa.L/S) that allows of Q:10 life-span per second; Volume (the unit: L) of V:VIP plate; T: the time (unit: S).
Above-mentioned showing, the maximum permission of 10 year life-span per second leak rate is 9.9 * 10
-5Pa.L/s, and the precision of leak locator is 1.0 * 10
-10Pa.M
3/ s=1.0 * 10
-7Pa.L/s can satisfy the detection requirement fully.
Embodiment
Following examples will the present invention is further illustrated.
Checkout equipment is made up of subtest platform and ZQJ-230D helium mass spectrometer leak detector, and helium mass spectrometer leak detector also can be selected ZQJ-291 for use, SFJ-231 or ZLS-260/T type helium mass spectrum leak detection.
The subtest platform: the subtest platform is of a size of 1000mm * 1000mm * 900mm (length * wide * height), and table top is provided with 2 test station, and right working position is the rectangle of 250mm * 350mm, can detect the sheet barrier film.Left side station is the barrier film bag that detects 350mm * 550mm, and the former can detect the sheet laminated film, and the latter can detect laminated film bag.The subtest platform is equipped with the sliding vane rotary vacuum pump of a 2X-1 and vacuum pipe and the valve that matches with it.With the parameter of the supporting ZQJ-230D helium mass spectrometer leak detector of subtest platform be:
Minimum detectable leak rate (to helium)＜5 * 10
-11Pa.m
3/ s;
Reaction time＜3s
Start-up time＜8min
Leak rate indicating range 10
-10～10
-7
10
-9～10
-5
10
-8～10
-5
Allow leak detection mouthful top pressure 20Pa
Allow spectrum tube maximum working pressure (MOP) 3 * 10
-2Pa
Embodiment 1: the leak detection of sheet laminated film.
1) film of size greater than 250mm * 350mm lain on the work stage of the vacuum chamber of making aperture, the silicon rubber loop sealing is arranged around the work stage, the film top compresses film the purpose that reaches sealing with stainless steel framework.
2) open general supply, vacuum meter shows normal, and it is bright to advise 1 lamp, and the expression right working position is in detecting position.
3) press mechanical pump and drive button, start mechanical pump, press the left shutdown valve of leak locator, left station is found time, vacuum tightness is less than 20Pa.
4) open left leak detector valve, close shutdown valve, leak locator begins leak detection.
5) leak rate shows zero point: in " referance leak " closed condition, regulate " fine zero " or " coarse zero " and make leak rate be presented at the sensitiveest shelves (* 10
-10) be about 0.5, and note initial reading.Suppose that initial reading is 3 * 10
-10Pam
3/ S.
6) spray helium and observe the demonstration of leak locator to film surface with the helium spray gun, if reading obviously rises, to a certain numerical value as 9 * 10
-10Pam
3/ S then this reading deducts initial reading and is leak rate.If reading does not have significant change, then continue the operation of next step.
7) the helium cover with stainless steel covers on the work stage of the vacuum chamber of making aperture that is covered with film, O-ring seal and work stage sealing are arranged at the helium cover bottom of stainless steel, inject helium from the aperture at the helium cover top of stainless steel, then aperture is blocked, write down initial time and observe the demonstration of leak locator, if show to rise to a certain numerical value, this reading is deducted initial reading and divided by being leak rate interval time.
Embodiment 2: the packaging bag detection method.
1) the very little packaging bag sample (the long 550mm of wide 350mm) of Standard object staff is enclosed within on the stainless steel perforate framework of auxiliary detection platform.
2) bottom of stainless steel perforate framework is the sealing surface that certain angle of inclination is arranged, and the stainless steel sealing ring of same slope is compressed sealing by silicon rubber loop with the plastics sack.
3) open general supply, vacuum meter shows normal, and it is bright to advise 1 lamp, represents that left station is in detecting position.
4) press mechanical pump and drive button, mechanical pump starts, and by the bottom left shutdown valve, left station is found time, and vacuum tightness is less than 20Pa.
5) open left leak detector valve, close shutdown valve, leak locator begins leak detection.
6) leak rate shows zero point: in " referance leak " closed condition, regulate " fine zero " or " coarse zero " and make leak rate be presented at the sensitiveest shelves (* 10
-10) be about 0.5, and note initial reading.Suppose that initial reading is 3 * 10
-10Pam
3L/S.
7) use the helium spray gun to barrier film bag surface injection helium from top to bottom, and observe the demonstration of leak locator, rise to a certain numerical value as 9 * 10 as demonstration
-10Pam
3This reading of L/S deducts initial reading and is leak rate.If reading does not have obvious variation and then continues following operation.
8) with a big polybag whole measured workpiece cover is got up and the end of polybag is tied up, open an aperture from above and squeeze into helium from aperture, and the polybag aperture tied, observe the seepage situation of helium to the Obstruct membrane pocket, write down initial time simultaneously, if the leak locator reading changes, reading under the stable reading postscript deducts initial reading with this reading and divided by being leak rate interval time.
Claims (1)
1. the baffle film leakage rate detection method that is used for vacuum heat-insulating plate is characterized in that described barrier film is the sheet laminated film, and its concrete steps are:
1) film of size greater than 250mm * 350mm lain on the work stage of the vacuum chamber of making aperture, the silicon rubber loop sealing is arranged around the work stage, the film top compresses film the purpose that reaches sealing with stainless steel framework;
2) open general supply, vacuum meter shows normal, makes the right working position of test board be in detecting position;
3) start mechanical pump, press the right shutdown valve of leak locator, the test board right working position is found time, vacuum tightness is less than 20Pa;
4) open right leak detector valve, close right shutdown valve, leak locator begins leak detection;
5) leak rate shows zero point: in " referance leak " closed condition, regulate " fine zero " or " coarse zero " and make leak rate be presented at the sensitiveest shelves, and note initial reading;
6) spray helium and observe the demonstration of leak locator to film surface with the helium spray gun, if reading rises to 9 * 10
-7Pa L/S, then this reading deducts initial reading and is leak rate, if reading does not have significant change, then continues the operation of next step;
7) the helium cover with stainless steel covers on the work stage of the vacuum chamber of making aperture that is covered with film, O-ring seal and work stage sealing are arranged at the helium cover bottom of stainless steel, inject helium from the aperture at the helium cover top of stainless steel, then aperture is blocked, write down initial time and observe the demonstration of leak locator, if show to rise to a certain numerical value, this reading is deducted initial reading and divided by being leak rate interval time;
Described leak locator is a helium mass spectrometer leak detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610122868A CN100592078C (en) | 2006-10-23 | 2006-10-23 | Method for detecting baffle film leakage rate for vacuum heat insulation board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610122868A CN100592078C (en) | 2006-10-23 | 2006-10-23 | Method for detecting baffle film leakage rate for vacuum heat insulation board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1945297A CN1945297A (en) | 2007-04-11 |
| CN100592078C true CN100592078C (en) | 2010-02-24 |
Family
ID=38044792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610122868A Active CN100592078C (en) | 2006-10-23 | 2006-10-23 | Method for detecting baffle film leakage rate for vacuum heat insulation board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100592078C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575459B (en) * | 2012-08-08 | 2016-07-13 | 苏州维艾普新材料股份有限公司 | The measurement apparatus of a kind of vacuum heat-insulating plate internal pressure and method of testing thereof |
| CN103063361A (en) * | 2013-02-27 | 2013-04-24 | 青岛科瑞新型环保材料有限公司 | Vacuum degree detection method of built-in type vacuum insulated panel |
| CN103389188B (en) * | 2013-07-16 | 2016-06-22 | 上海实路真空技术工程有限公司 | A kind of leakage detection apparatus for the detection of insulated gas cylinder leak rate and leak hunting method |
| CN104374518A (en) * | 2013-08-12 | 2015-02-25 | 苏州维艾普新材料股份有限公司 | Device and method for measuring vacuum degree inside vacuum thermal insulation panel |
| FR3039273B1 (en) * | 2015-07-20 | 2017-08-11 | Pfeiffer Vacuum Sas | METHOD FOR CONTROLLING THE SEALING OF SEALED PRODUCTS AND A LEAK DETECTION PLANT |
| CN106932431A (en) * | 2015-12-29 | 2017-07-07 | 北京有色金属研究总院 | A kind of online heat waste test system of slot type high-temperature vacuum heat-collecting tube and method |
| CN110530584B (en) * | 2019-08-29 | 2021-06-29 | 歌尔股份有限公司 | Automatic testing method and equipment for sealing performance of waterproof breathable film |
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|---|---|---|---|---|
| US5076984A (en) * | 1990-10-10 | 1991-12-31 | Raytheon Company | Method for fabricating thermal insulation |
| EP0619226A1 (en) * | 1993-03-23 | 1994-10-12 | Whirlpool Corporation | Vacuum panel assembly method |
| CN1146553A (en) * | 1995-02-09 | 1997-04-02 | 莱波尔德股份公司 | Dectector for gas leakage |
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| CN1945297A (en) | 2007-04-11 |
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