CN102221283B - Drying device for EVA (Ethylene Vinyl Acetute) sample crosslinking degree test - Google Patents
Drying device for EVA (Ethylene Vinyl Acetute) sample crosslinking degree test Download PDFInfo
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- CN102221283B CN102221283B CN201110074173.4A CN201110074173A CN102221283B CN 102221283 B CN102221283 B CN 102221283B CN 201110074173 A CN201110074173 A CN 201110074173A CN 102221283 B CN102221283 B CN 102221283B
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Abstract
The invention provides a drying device for an EVA (Ethylene Vinyl Acetute) sample crosslinking degree test. The drying device comprises a thermal-insulating oven, a tank cover, a fluid removal barrel, a motor, a drainage electromagnetic reversing valve, a fluid drainage tube, a gas transmission electromagnetic reversing valve, a hot air inlet tube and a hot air exhaust tube, wherein the fluid removal barrel driven by the motor is arranged in the thermal-insulating oven; the fluid drainage tube and the hot air inlet tube are arranged at the bottom of the thermal-insulating oven; in the height direction, the fluid drainage tube is positioned under the hot air inlet tube; the fluid drainage tube is communicated with the cavity of the thermal-insulating oven; the hot air inlet tube is communicated with the cavity of a closed drying tank body; and the hot air exhaust tube is communicated with the upper side of the cavity of the thermal-insulating oven. By using the device, an extracted EVA rubber sample can be directly subjected to fluid removal and drying, a toxic dimethylbenzene solvent is concentrically recycled, so that the toxic dimethylbenzene solvent is prevented from overflowing to pollute the environment and hurting operators; and drying is carried out by adopting hot air flow at the temperature of between 30 and 50 DEG C, so that burning accidents of the dimethylbenzene in a drying process can be effectively prevented, and the EVA rubber sample can be dried quickly.
Description
Technical field
The present invention relates to the checkout gear to encapsulating material in solar module production process, relate in particular to the drying device to the test of the EVA sample degree of cross linking.
Background technology
Solar cell power generation utilization be the quantum effect of semiconductor silicon material, directly luminous energy is changed into electric energy, if silicon wafer is directly exposed in atmosphere, be subject to the impact of various environmental factors, its opto-electronic conversion energy-saving effect can be decayed, for Assurance component uses 20-25 under outdoor conditions, must there is good encapsulation, the requirement of the condition such as, anticorrosion windproof, dustproof, damp proof to solar module in use to meet.Research experiment shows, the inefficacy of battery, and problem often goes out in the encapsulation of solar module.Generally all adopt for this reason transparent, fast light anti-aging, caking property good, can bear atmosphere change and there is flexible EVA glue-line by solar cell package; and be bonded as one with upper strata protective material glass, the protective material TPT of lower floor (polyvinyl fluoride composite membrane), form solar module.
Glued membrane used for encapsulation of solar battery is taking EVA as base-material, is aided with several modifier, is rolled into film-type product through film-forming apparatus.This product is heated in solar cell package process, produces cross-linking reaction, belongs to heat cured hot melt adhesive film.Glued membrane after solidifying has quite high light transmittance, adhesive strength, heat endurance, air-tightness and ageing-resistant performance.Linear or slightly prop up the polymer of chain, by the effect of crosslinking agent, be converted into tridimensional network.It can significantly improve cohesive strength, the heat endurance etc. of polymer.In order to grasp the physical property of EVA class adhesive and the relation of the degree of cross linking, the relation of the degree of cross linking and dosage of crosslinking agent, must correctly measure the degree of cross linking.The mensuration of the degree of cross linking is for the control of production technology, raw-material selection, and the control of product quality is extremely important.EVA is most widely used a kind of thermosetting resin in crystal silicon solar energy battery encapsulation, and after solar cell package, EVA must have evenly and the firmly bonding degree of cross linking.The degree of cross linking refers to that EVA molecule reaches the degree of not molten gel solidification through cross-linking reaction.EVA has been not only adhering and sealing effect, and quality and life-span to solar cell play vital effect, in a sense, the life-span of solar panel is determined by EVA.
In the factory or the laboratory that produce solar components, the detection of EVA performance is taked to the method by xylene extraction conventionally, principle be EVA class adhesive in technique for applying due to heating adhesive solidification, part EVA is cross-linked into gel, by uncrosslinked part in solvent xylene extraction sample, thereby carried out the mensuration of the degree of cross linking.
The basic skills of test is that the EVA glue sample scissors being cross-linked is cut into fractionlet, on electronic balance, accurately take sample, sample is put in 120 order stainless steel wire mesh bags of known weight, in the flask that is provided with reflux, add the antioxidant of xylene solvent and 1%～1.5%, crosslinked once again to prevent EVA glue sample, the stainless steel wire mesh bag that sample is housed is suspended in above-mentioned flask, be heated to the shape that seethes with excitement, reflux 5 hours, taking out sample bag naturally drips and puts into vacuum drying oven after removing and dry 3 hours until liquid flux wherein, then take out sample bag and put drier into interior cooling 15 minutes, stripped EVA glue sample is carried out to Weighing again, according to quality before and after the EVA glue sample before and after extraction, calculate the degree of cross linking of EVA glue sample.In whole test process, the step that stripped EVA glue sample is dried is very important, and it directly affects final testing result.At present, conventionally adopt the direct drying mode of baking oven heating, because adopting xylene solvent, EVA glue sample extracts, in EVA glue sample after extraction, also contain dimethylbenzene, and dimethylbenzene is poisonous, inflammable solvent, therefore the EVA glue sample after extraction is directly dried and had certain danger, operating personnel must bring protective articles, it is careful that operation is careful, if the bad burning that can cause dimethylbenzene of temperature control can damage operator if draw badly.In manufacture of solar cells enterprise, operator is reluctant to be engaged in the work in this post, therefore, must design a kind of EVA sample degree of cross linking test drying device, it can directly take off liquid and oven dry to the EVA glue sample after extraction, can not only prevent that the excessive of poisonous xylene solvent from producing and polluting environment, injury operator, the burning that prevents from producing dimethylbenzene in drying course, and can flash baking.
Summary of the invention
The invention provides a kind of EVA sample degree of cross linking test drying device, it can directly take off liquid and oven dry to the EVA glue sample after extraction, can not only get rid of fast poisonous xylene solvent, and can dry fast, ensure drying effect, provide initial data accurately for obtaining the degree of cross linking accurately.
The technical solution adopted in the present invention is:
A kind of EVA sample degree of cross linking test drying device, it is characterized in that: it comprises sealed thermal insulating baking oven, case lid, de-fluid drum, motor, discharge opeing solenoid directional control valve, discharging tube, gas transmission solenoid directional control valve, hot blast air inlet pipe and hot blast blast pipe, in sealed thermal insulating baking oven, be provided with de-fluid drum, de-fluid drum is by Motor Drive, discharging tube and hot blast air inlet pipe are equipped with in the bottom of sealed thermal insulating baking oven, short transverse discharging tube be positioned at hot blast air inlet pipe below, discharging tube leads to by discharge opeing solenoid directional control valve and sealed thermal insulating oven ncavity, hot blast air inlet pipe is led to by gas transmission solenoid directional control valve and sealed thermal insulating oven ncavity, hot blast blast pipe and sealed thermal insulating oven ncavity top interlink.
Operation requirements of the present invention is: will after taking out flask, directly put into de-fluid drum through the stripped EVA glue of xylene solvent sample, cover case lid, discharge opeing solenoid directional control valve is in open mode, gas transmission solenoid directional control valve is in closed condition, actuating motor makes de-fluid drum High Rotation Speed, EVA glue sample is taken off to liquid processing, remove the extract in EVA glue sample, reduce to greatest extent the xylene solvent in EVA glue sample, extract flows in recycling bin, after de-liquid finishes, close discharge opeing solenoid directional control valve, open gas transmission solenoid directional control valve, control motor and carry out low-speed running, now hot blast air inlet pipe is inputted hot-air by gas transmission solenoid directional control valve in the inner chamber of insulation baking oven, EVA glue sample is dried by hot air flow, owing to being provided with liquid drain hole on the bucket wall at de-fluid drum, hot air flow fully contacts with EVA glue sample through liquid drain hole, thereby EVA glue sample is carried out to flash baking, in this process, discharge extract by centralized recovery from discharging tube, the gas of discharging from hot blast blast pipe is through cooling processing, collect micro-dimethylbenzene and water wherein.This device can directly take off liquid and oven dry to the EVA glue sample after extraction, poisonous xylene solvent has obtained centralized recovery processing, can not only prevent that the excessive of poisonous xylene solvent from producing and polluting environment, injury operator, adopt the hot air flow of 30 DEG C～50 DEG C to dry, can effectively prevent from occurring the pyrophoricity accident of dimethylbenzene in drying course, and can dry EVA glue sample fast.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
In figure: 1-sealed thermal insulating baking oven; 2-case lid; 3-de-fluid drum; 4-motor; 5-discharge opeing solenoid directional control valve; 6-discharging tube; 7-gas transmission solenoid directional control valve; 8-hot blast air inlet pipe; 9-hot blast blast pipe.
Detailed description of the invention
Introduce in detail the specific embodiment of the present invention below in conjunction with accompanying drawing:
A kind of EVA sample degree of cross linking test drying device, as shown in Figure 1, it comprises sealed thermal insulating baking oven 1, case lid 2, de-fluid drum 3, motor 4, discharge opeing solenoid directional control valve 5, discharging tube 6, gas transmission solenoid directional control valve 7, hot blast air inlet pipe 8 and hot blast blast pipe 9, in sealed thermal insulating baking oven 1, be provided with de-fluid drum 3, de-fluid drum 3 is driven by motor 4, discharging tube 6 and hot blast air inlet pipe 8 are equipped with in the bottom of sealed thermal insulating baking oven 1, the setting position of discharging tube 6 and hot blast air inlet pipe 8 requires: below short transverse discharging tube 6 is positioned at hot blast air inlet pipe 8, discharging tube 6 leads to by discharge opeing solenoid directional control valve 5 and sealed thermal insulating baking oven 1 inner chamber, hot blast air inlet pipe 8 is led to by gas transmission solenoid directional control valve 7 and sealed thermal insulating baking oven 1 inner chamber, hot blast blast pipe 9 interlinks with sealed thermal insulating baking oven 1 inner chamber top.
Concrete operations of the present invention require:
To after taking out flask, directly put into the de-fluid drum on sealed thermal insulating baking oven 1 through the stripped EVA glue of xylene solvent sample, cover case lid 2, according to the form below control discharge opeing solenoid directional control valve 5, gas transmission solenoid directional control valve 7 and actuating motor 4, take off liquid and oven dry successively.
| Duty | Discharge opeing solenoid directional control valve 5 | Gas transmission solenoid directional control valve 7 | Motor 4 |
| De-liquid | Open | Close | High Rotation Speed |
| Dry | Close | Open | Close or low speed rotation |
When de-liquid, open discharge opeing solenoid directional control valve 5, close gas transmission solenoid directional control valve 7, actuating motor 4 is worked de-fluid drum 3, EVA glue sample is taken off to liquid processing, remove the extract in EVA glue sample, reduce to greatest extent the xylene solvent in EVA glue sample, after de-liquid finishes, close discharge opeing solenoid directional control valve 5, open gas transmission solenoid directional control valve 7, close or control motor 4 and carry out low speed rotation, hot blast air inlet pipe is inputted hot-air in the inner chamber of sealed thermal insulating baking oven 1, EVA glue sample is dried by thermal current, owing to being provided with liquid drain hole on the bucket wall at de-fluid drum 3, hot-air fully contacts with EVA glue sample through liquid drain hole, thereby EVA glue sample is carried out to flash baking, in this process, discharge extract by centralized recovery from discharging tube, the gas of discharging from hot blast blast pipe 9 is collected micro-dimethylbenzene and water wherein through cooling processing.This device can directly take off liquid and oven dry to the EVA glue sample after extraction, poisonous xylene solvent is recovered and focuses on, can not only prevent that the excessive of poisonous xylene solvent from producing and polluting environment, injury operator, adopt the hot-air flow of 30 DEG C～50 DEG C to dry, can effectively prevent from occurring the pyrophoricity accident of dimethylbenzene in drying course, and can dry EVA glue sample fast.
Claims (1)
1. an EVA sample degree of cross linking test drying device, it is characterized in that: it comprises sealed thermal insulating baking oven (1), case lid (2), de-fluid drum (3), motor (4), discharge opeing solenoid directional control valve (5), discharging tube (6), gas transmission solenoid directional control valve (7), hot blast air inlet pipe (8) and hot blast blast pipe (9), in sealed thermal insulating baking oven (1), be provided with de-fluid drum (3), de-fluid drum (3) is driven by motor (4), discharging tube (6) and hot blast air inlet pipe (8) are equipped with in the bottom of sealed thermal insulating baking oven (1), the setting position of discharging tube (6) and hot blast air inlet pipe (8) requires: the below that is positioned at hot blast air inlet pipe (8) at short transverse discharging tube (6), discharging tube (6) leads to by discharge opeing solenoid directional control valve (5) and sealed thermal insulating baking oven (1) inner chamber, hot blast air inlet pipe (8) is led to by gas transmission solenoid directional control valve (7) and sealed thermal insulating baking oven (1) inner chamber, hot blast blast pipe (9) interlinks with sealed thermal insulating baking oven (1) inner chamber top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110074173.4A CN102221283B (en) | 2011-03-25 | 2011-03-25 | Drying device for EVA (Ethylene Vinyl Acetute) sample crosslinking degree test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110074173.4A CN102221283B (en) | 2011-03-25 | 2011-03-25 | Drying device for EVA (Ethylene Vinyl Acetute) sample crosslinking degree test |
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| CN102221283A CN102221283A (en) | 2011-10-19 |
| CN102221283B true CN102221283B (en) | 2014-07-23 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102967524A (en) * | 2012-12-04 | 2013-03-13 | 韩华新能源（启东）有限公司 | Ethylene vinyl acetate (EVA) crosslinking degree testing method |
| CN104075958A (en) * | 2013-03-27 | 2014-10-01 | 普德光伏技术（苏州）有限公司 | Method for testing degree of crosslinking of materials of encapsulation layers of photovoltaic module |
| CN104280309B (en) * | 2013-07-02 | 2016-12-07 | 普德光伏技术（苏州）有限公司 | A kind of method of testing of the photovoltaic module EVA encapsulating material degree of cross linking |
| CN110006774A (en) * | 2018-01-04 | 2019-07-12 | 中电电气(上海)太阳能科技有限公司 | A kind of cross linking degree tester of recyclable dimethylbenzene and its application |
| CN112326496B (en) * | 2020-04-28 | 2022-07-19 | 苏州喜全软件科技有限公司 | Material moisture content detection device for microwave technology |
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| CN2053542U (en) * | 1989-03-20 | 1990-02-28 | 王俊杰 | Remnant liquid recovering device |
| JP4412247B2 (en) * | 2005-06-30 | 2010-02-10 | 三菱自動車工業株式会社 | Engine torque calculation device |
| JP2008086914A (en) * | 2006-10-02 | 2008-04-17 | Shiga Yamashita:Kk | Device for removing water from workpiece |
| CN100543391C (en) * | 2007-09-29 | 2009-09-23 | 杜国忠 | Gyroscope type dewatering machine |
| CN201731729U (en) * | 2010-07-08 | 2011-02-02 | 张国宾 | Drying type constant temperature oven |
| CN101893369B (en) * | 2010-08-09 | 2013-07-03 | 大连华根机械有限公司 | Laundry drier |
| CN202033265U (en) * | 2011-03-25 | 2011-11-09 | 常州亿晶光电科技有限公司 | Drying device for testing cross-linking degree of EVA (ethylene vinyl acetate) sample |
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