CN107340358B - A kind of chain-plate type substance combustion screening plant - Google Patents
A kind of chain-plate type substance combustion screening plant Download PDFInfo
- Publication number
- CN107340358B CN107340358B CN201611088446.XA CN201611088446A CN107340358B CN 107340358 B CN107340358 B CN 107340358B CN 201611088446 A CN201611088446 A CN 201611088446A CN 107340358 B CN107340358 B CN 107340358B
- Authority
- CN
- China
- Prior art keywords
- combustion
- thermocouple
- combustion boat
- boat
- isolation cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention relates to a kind of chain-plate type substance combustion screening plants, including combustion boat, flight conveyor, isolation cover, igniting spray gun, thermocouple and combustion boat gear remove plate, combustion boat is for holding sample, combustion boat hangers is provided on flight conveyor, for hanging combustion boat, and continuously combustion boat is delivered in isolation cover, isolation cover is arranged above flight conveyor, the place of combustibility test is carried out for sample, igniting spray gun is located in isolation cover, for carrying out ignition to the sample in combustion boat, thermocouple is located in isolation cover, for measuring the ignition temperature of sample in combustion boat, combustion boat gear is completed the combustion boat that combustibility is tested except plate is used to come out from isolation cover and takes off from flight conveyor.Compared with prior art, the configuration of the present invention is simple, easy to operate, can be carried out continuously measurement by the rotation of carrier bar, work efficiency is high, can carry out the measurement of solid, liquid and viscous gelled sample, and use scope is wide.
Description
Technical field
The invention belongs to substance combustion screening technique fields, screen and fill more particularly, to a kind of chain-plate type substance combustion
It sets.
Background technique
In recent years, China's safety accident as caused by chemicals is in rising trend, a part of chemicals because of its inherent characteristic,
Easily cause burning, explosion, causes casualties, the serious consequences such as environmental pollution and property loss.Chemicals it is many kinds of,
Using relatively extensively, must chemicals correctly be classified and be managed in fields such as its production, transport, identification, supervision.
There are the properties such as poison, burn into explodes, burns, is combustion-supporting in chemicals, there is harm to human body, facility, environment
Severe poisonous chemicals and other chemicals are known as hazardous chemical.Currently, being not higher than in closed cup test for dangerous material flash-point
60.5 DEG C or the liquid in open cup test not higher than 65.5 DEG C need to add sustained combustion test, the test of sustained combustion characteristic
Method mainly uses the United Nations " the recommendation model constitution about Dangerous Goods Transport " the 17th revised edition (first volume) the 2.3rd
The 3rd class flammable liquid part of chapter, and described in " manual of tests and criteria " STSGAC.1011Rev.532.5.2 test L.2
" test method for determining sustained combustion ";In China, " the dangerous material flammable liquid sustained combustion of standard GB/T/T21622-2008
Test method " referring generally to above-mentioned the United Nations's standard method.During test described in standard, experimenter is by a certain amount of examination
It tests sample to be placed in sample slot, then is removed after applying the flame of certain time at the regulation and observe whether test specimen can be held
Afterflame is burnt.The incendiary source used in standard at present is the gas arc lamp using butane as fuel, there is certain safety to testing crew
Hidden danger;And total Test personnel's manual switching, efficiency are lower.
In conclusion generally requiring quickly and effectively to judge flammability during screening substance combustion screening test
As a result, therefore improving the automatization level of test is necessary, automatic test effectively increases testing efficiency safety
Property, there is wide application prospect.
Summary of the invention
Continuous, automation that it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind,
The chain-plate type substance combustion screening plant of safety, to be screened for substance combustion performance.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of chain-plate type substance combustion screening plant, including combustion boat, flight conveyor, driving wheel, driven wheel, isolation
Cover, igniting spray gun, thermocouple and combustion boat gear remove plate,
Combustion boat is used to hold the sample of pending combustibility test;
It is provided with combustion boat hangers on flight conveyor, combustion boat is delivered to isolation for hanging combustion boat, and continuously
In cover;
Driving wheel and driven wheel interval are arranged, and drive flight conveyor rotation;
Isolation cover is arranged above flight conveyor, and along flight conveyor conveying direction inlet porting and outlet, isolation
The inside of cover is the place that sample carries out combustibility test;
Igniting spray gun is located in isolation cover, for carrying out ignition to the sample in combustion boat;
Thermocouple is located in isolation cover, for measuring the ignition temperature of sample in combustion boat;
Combustion boat gear is arranged by flight conveyor except plate, and the burning that combustibility is completed and tests will be come out from isolation cover
Ware is taken off from flight conveyor, and falls into the box of a placement.
There are two the thermocouple is arranged altogether, respectively the first thermocouple and the second thermocouple, first thermoelectricity
Even to be arranged close to igniting spray gun, second thermocouple and the first thermocouple interval are arranged, and along flight conveyor advance side
To the setting of, the first thermocouple preceding, the setting of the second thermocouple is in the first rear, described thermocouple for the igniting of measurement point fire-fighting rifle
When combustion boat in sample combustion when temperature and igniting spray gun extinguish the temperature change of sample combustion in after-combustion ware, described the
Two thermocouples are used to measure temperature when still burning when sample in combustion boat turns to the second thermocouple.
First thermocouple is connect with the moisture recorder being arranged in outside isolation cover with the second thermocouple, described
Moisture recorder record the first thermocouple and the second thermocouple temperature.
Camera is additionally provided in the isolation cover, the camera connects with the monitor being arranged in outside isolation cover
It connects, the camera is used for the state of real-time monitoring substance combustion, and to judge the flammability of substance, the monitor passes through
Camera can show in combustion boat sample whether be ignited and flame whether sustained combustion.
The exhaust tube extended to outside isolation cover is additionally provided in the isolation cover, it is useless for what is generated during testing
The discharge such as gas.
The driving wheel and driven wheel is arranged on bracket by wheel shaft, and the driving wheel inner hub passes through electricity
Machine drives rotation.
The flight conveyor is formed by connecting by carrier bar by pin shaft, and the combustion boat hangers is fixed at equal intervals
Chain plate surface.
The combustion boat is ceramic burner ware.
The combustion boat upper surface offers the groove for placing sample, and the combustion boat lower surface is equipped with for hanging
Strip groove on combustion boat hangers.
Front end setting is sloping on the downside of the combustion boat, the combustion boat gear except front edge of board be arranged to under combustion boat
The slope of side front end Slope Facies complementation.
The present invention is compared to GB/T 21622-2008 " dangerous material flammable liquid sustained combustion test method " and " about danger
The recommendation of dangerous cargo transport " test method in model constitution about flammable liquid sustained combustion has very big improvement, this
The main adjustable rotation using carrier bar of invention can carry out continuous flammability sieve to solid, liquid and viscose glue shape test specimen
Choosing test applies standard flame source using igniting spray gun, and spray gun of then lighting a fire still keeps the stop of certain time after extinguishing, and passes through
The flame situation that the variation of first thermocouple record temperature and monitor are shown more intuitively judges whether substance can continue
Burning;It is long to sample burning times also to be gone at the second thermocouple, further judged.In addition, of the invention
Device also has the advantage that
1, by the rotation of a whole set of chain plate device, and cooperate combustion boat gear remove plate use, allow test specimen by
Continuous measurement, greatly improves working efficiency.
2, the combustion boat for holding test specimen can contain solid, liquid and emplastic sample, to the character of sample
Particular/special requirement is had no, use scope is wider.
3, device can reduce the pollution to air equipped with pumping purification system (exhaust tube).
4, entire test process carries out in isolation cover, increases safety, while again by camera and monitor
The whole circumstances for testing progress can be observed in real time in isolation cover, safety is increased.
Detailed description of the invention
Fig. 1 is chain-plate type substance combustion screening plant schematic view of the front view of the present invention;
Fig. 2 is chain-plate type substance combustion screening plant side structure schematic view of the present invention;
Fig. 3 is ceramic burner ware schematic perspective view in chain-plate type substance combustion screening plant of the present invention;
Fig. 4 is ceramic burner ware side structure schematic view in chain-plate type substance combustion screening plant of the present invention.
Figure label: 1, moisture recorder, 2, monitor, 3, igniting spray gun, 4, camera, 5, combustion boat, 6, driving wheel,
7, combustion boat hangers, 8, bracket, 9, carrier bar, 10, wheel shaft, 11, combustion boat gear remove plate, 12, driven wheel, 13, pin shaft, 14, isolation
Cover, the 15, second thermocouple, the 16, first thermocouple, 17, exhaust tube.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
A kind of chain-plate type substance combustion screening plant, as shown in Figure 1 and Figure 2, including combustion boat 5, flight conveyor, drive
Driving wheel 6, driven wheel 12, isolation cover 14, igniting spray gun 3, thermocouple and combustion boat gear remove plate 11, combustion boat 5 for hold into
The sample of row combustibility test;Combustion boat hangers 7 is provided on flight conveyor, for hanging combustion boat 5, and continuously will combustion
Ware 5 is burnt to be delivered in isolation cover 14;Driving wheel 6 and the interval of driven wheel 12 are arranged, and drive flight conveyor rotation;Isolation cover 14 is set
It sets above flight conveyor, and along flight conveyor conveying direction inlet porting and outlet, the inside of isolation cover 14 is sample
Carry out the place of combustibility test;Igniting spray gun 3 is located in isolation cover 14, for lighting a fire to the sample in combustion boat 5
Burning;Thermocouple is located in isolation cover 14, for measuring the ignition temperature of sample in combustion boat 5;Combustion boat gear is arranged except plate 11
By flight conveyor, the combustion boat 5 that combustibility is tested will be completed out from isolation cover 14 and be taken off from flight conveyor,
And it falls into the box of a placement.
Wherein, there are two thermocouple is arranged altogether, respectively the first thermocouple 16 and the second thermocouple 15, the first thermocouple 16
It is arranged close to igniting spray gun 3, the second thermocouple 15 and the setting of the first thermocouple 16 interval, and along flight conveyor direction of advance,
The setting of first thermocouple 16 is preceding, and the setting of the second thermocouple 15 is rear, when the first thermocouple 16 is lighted a fire for measurement point fire-fighting rifle 3
Temperature and igniting spray gun 3 extinguish the temperature change of sample combustion in after-combustion ware 5, the second heat when sample combustion in combustion boat 5
Galvanic couple 15 is used to measure temperature when still burning when sample in combustion boat 5 turns to the second thermocouple 15.First thermocouple 16
It is connect with the moisture recorder 1 being arranged in outside isolation cover 14 with the second thermocouple 15, moisture recorder 1 records the first thermoelectricity
The temperature of idol 16 and the second thermocouple 15.
Camera 4 is additionally provided in isolation cover 14, camera 4 is connect with the monitor 2 being arranged in outside isolation cover 14, camera shooting
First 4 are used for the state of real-time monitoring substance combustion, and to judge the flammability of substance, monitor 2 can show combustion by camera 4
Burn ware 5 in sample whether be ignited and flame whether sustained combustion.
The exhaust tube 17 extended to outside isolation cover 14 is additionally provided in isolation cover 14, it is useless for what is generated during testing
The discharge such as gas.
Driving wheel 6 and driven wheel 12 are arranged on bracket 8 by wheel shaft 10, and 6 inner hub of driving wheel passes through motor band
Turn is dynamic.
Flight conveyor is formed by connecting by carrier bar 9 by pin shaft 13, and combustion boat hangers 7 is fixed on 9 table of carrier bar at equal intervals
Face.
As shown in Figure 3, Figure 4, combustion boat 5 is ceramic burner ware.5 upper surface of combustion boat offers the groove for placing sample,
5 lower surface of combustion boat is equipped with the strip groove for being hung on combustion boat hangers 7.The setting of 5 downside front end of combustion boat is sloping, combustion
Ware gear is burnt except 11 front end of plate is arranged to the slope complementary with 5 downside front end Slope Facies of combustion boat.
Device provided in this embodiment in use, testing crew combustion boat 5 is placed on balance first weigh it is a certain amount of
Test specimen, after place it on combustion boat hangers 7, by driving wheel 6 drive carrier bar 9 rotate, test sample will be contained with
The combustion boat of product is sent into isolation cover 14, and reaches the ignition location of 14 midpoint fire-fighting rifle 3 of isolation cover, is carried out by igniting spray gun 3
The igniting of certain time, the temperature that igniting spray gun 3 still keeps one section of residence time after extinguishing, while being recorded by the first thermocouple 16
Variation and the flame situation by showing on the monitor 2 after the shooting of camera 4 are spent to judge the flammability of test specimen, if
Test specimen burning time is long can also to be gone to be gone at the second thermocouple 15 and continues to detect, and carried out further
Judge the flammability of test specimen.
Plate 11 is removed since flight conveyor end is equipped with combustion boat gear, when combustion boat 5 is continued to rotate to flight conveyor
Can be burned when end ware gear except plate 11 gear remove, combustion boat 5 by scraper plate gear remove after can be cleaned, dry in case next time use,
Generated exhaust gas is extracted out by the exhaust tube 17 being connected with isolation cover 14 in test.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (8)
1. a kind of chain-plate type substance combustion screening plant characterized by comprising
Combustion boat (5): for holding the sample of pending combustibility test;
Flight conveyor: being provided with combustion boat hangers (7), for hanging combustion boat (5), and continuously that combustion boat (5) is defeated
It send to isolation cover (14);
Driving wheel (6) and driven wheel (12): flight conveyor rotation is driven;
Isolation cover (14): being arranged above flight conveyor, and along flight conveyor conveying direction inlet porting and outlet, isolation
The inside for covering (14) is the place of sample progress combustibility test;
Igniting spray gun (3): being located in isolation cover (14), for carrying out ignition to the sample in combustion boat (5);
Thermocouple: it is located in isolation cover (14), for measuring the ignition temperature of combustion boat (5) interior sample;
Combustion boat gear removes plate (11): being arranged by flight conveyor, will come out from isolation cover (14) and combustibility test is completed
Combustion boat (5) taken off from flight conveyor;
There are two the thermocouple is arranged altogether, respectively the first thermocouple (16) and the second thermocouple (15), described first
Thermocouple (16) is arranged close to igniting spray gun (3) setting, second thermocouple (15) and the first thermocouple (16) interval, institute
Temperature and igniting when combustion boat (5) interior sample combustion when the first thermocouple (16) stated is lighted a fire for measurement point fire-fighting rifle (3)
Spray gun (3) extinguishes the temperature change of after-combustion ware (5) interior sample combustion, and second thermocouple (15) is for measuring combustion boat
(5) temperature when still burning when interior sample turns to the second thermocouple (15);
The combustion boat (5) is ceramic burner ware.
2. a kind of chain-plate type substance combustion screening plant according to claim 1, which is characterized in that first heat
Galvanic couple (16) is connect with setting in the external moisture recorder (1) of isolation cover (14) with the second thermocouple (15), the temperature
Spend the temperature of recorder (1) record the first thermocouple (16) and the second thermocouple (15).
3. a kind of chain-plate type substance combustion screening plant according to claim 1, which is characterized in that the isolation cover
(14) it is additionally provided with camera (4) in, the camera (4) is connect with setting in the external monitor (2) of isolation cover (14), institute
The camera (4) stated is used for the state of real-time monitoring substance combustion, and to judge the flammability of substance, the monitor (2) is logical
Cross camera (4) show combustion boat (5) interior sample whether be ignited and flame whether sustained combustion.
4. a kind of chain-plate type substance combustion screening plant according to claim 1, which is characterized in that the isolation cover
(14) it is additionally provided in and extends to the external exhaust tube (17) of isolation cover (14), for the exhaust gas generated during test to be discharged.
5. a kind of chain-plate type substance combustion screening plant according to claim 1, which is characterized in that the driving wheel
(6) it is arranged on bracket (8) by wheel shaft (10) with driven wheel (12), the driving wheel (6) inner hub passes through motor
Drive rotation.
6. a kind of chain-plate type substance combustion screening plant according to claim 1, which is characterized in that the carrier bar passes
Band is sent to be formed by connecting by carrier bar (9) by pin shaft (13), the combustion boat hangers (7) is fixed on carrier bar (9) table at equal intervals
Face.
7. a kind of chain-plate type substance combustion screening plant according to claim 1, which is characterized in that the combustion boat
(5) upper surface offers the groove for placing sample, and the combustion boat (5) lower surface is equipped with for being hung on combustion boat hangers
(7) strip groove on.
8. a kind of chain-plate type substance combustion screening plant according to claim 1, which is characterized in that the combustion boat
(5) setting of downside front end is sloping, and the combustion boat gear is arranged to and front end slope on the downside of combustion boat (5) except plate (11) front end
Mutually complementary slope.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201611088446.XA CN107340358B (en) | 2016-12-01 | 2016-12-01 | A kind of chain-plate type substance combustion screening plant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201611088446.XA CN107340358B (en) | 2016-12-01 | 2016-12-01 | A kind of chain-plate type substance combustion screening plant |
Publications (2)
Publication Number | Publication Date |
---|---|
CN107340358A CN107340358A (en) | 2017-11-10 |
CN107340358B true CN107340358B (en) | 2019-11-12 |
Family
ID=60223193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201611088446.XA Active CN107340358B (en) | 2016-12-01 | 2016-12-01 | A kind of chain-plate type substance combustion screening plant |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN107340358B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111650387B (en) * | 2020-05-26 | 2023-11-28 | 上海化工研究院有限公司 | Chain type continuous sample injection, cleaning and calibration system based on photoelectric identification |
CN113740482A (en) * | 2021-09-24 | 2021-12-03 | 山东省产品质量检验研究院 | Automatic testing device for flame retardant property of helmet for firefighter and using method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201063028Y (en) * | 2006-07-10 | 2008-05-21 | 中国人民解放军总后勤部油料研究所 | Flash point tester for minisize oil plants |
CN101858853A (en) * | 2010-06-01 | 2010-10-13 | 长沙开元仪器有限公司 | Sulfur meter |
CN202837212U (en) * | 2012-09-26 | 2013-03-27 | 公安部天津消防研究所 | Device for combustion, explosion simulation, inerting and inhibiting experiments of gas cloud |
CN104330517A (en) * | 2014-10-22 | 2015-02-04 | 中国石油化工股份有限公司 | Device for testing combustion risk grade of chemical substance |
CN106442605A (en) * | 2016-11-25 | 2017-02-22 | 桂林永福龙港绿色环保建材有限公司 | Detection device of fireproof plate |
-
2016
- 2016-12-01 CN CN201611088446.XA patent/CN107340358B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201063028Y (en) * | 2006-07-10 | 2008-05-21 | 中国人民解放军总后勤部油料研究所 | Flash point tester for minisize oil plants |
CN101858853A (en) * | 2010-06-01 | 2010-10-13 | 长沙开元仪器有限公司 | Sulfur meter |
CN202837212U (en) * | 2012-09-26 | 2013-03-27 | 公安部天津消防研究所 | Device for combustion, explosion simulation, inerting and inhibiting experiments of gas cloud |
CN104330517A (en) * | 2014-10-22 | 2015-02-04 | 中国石油化工股份有限公司 | Device for testing combustion risk grade of chemical substance |
CN106442605A (en) * | 2016-11-25 | 2017-02-22 | 桂林永福龙港绿色环保建材有限公司 | Detection device of fireproof plate |
Also Published As
Publication number | Publication date |
---|---|
CN107340358A (en) | 2017-11-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107340358B (en) | A kind of chain-plate type substance combustion screening plant | |
CN109557277A (en) | A kind of gas and dust explosive characteristic test device | |
CN105588780B (en) | Fire extinguishing agent inerting resistance performance test system and test method thereof | |
CN201156037Y (en) | Pyrotechnic compound combustion and explosion performance detector | |
CN105115920A (en) | Experiment system and experiment method for testing ignition delay time of combustible gas | |
WO2008057139A3 (en) | Aerosol fire-retarding delivery device | |
CN205748959U (en) | A kind of assay device for pipeline explosion arrestment spark arrester performance test | |
CN104797303B (en) | Mitigate vaporous cloud by Chemical Inhibition to explode | |
EP1956321A3 (en) | Absorption refrigerator flame arrestor system | |
CN207248805U (en) | The grading plant of dust combustion danger | |
Marmo | Case study of a nylon fibre explosion: An example of explosion risk in a textile plant | |
CN109900492A (en) | A kind of automobile bonfire test system and method | |
CN219715357U (en) | Fire-resistant building material's check out test set | |
RU107699U1 (en) | FIRE EXTINGUISHING AEROSOL GENERATOR | |
CN205796293U (en) | A kind of disaster hidden-trouble is monitored system and uses the fire extinguishing system of this monitoring system | |
CN106871749B (en) | A kind of device measuring fireworks and firecrackers impact force | |
CN112345588A (en) | Device and method for testing explosion-proof performance of positive-pressure environment explosion protection product | |
CN208125655U (en) | A kind of open fire dust cloud that ignites fires experimental determination device | |
CN202256210U (en) | Selfignition temperature tester | |
CN102788179A (en) | Novel wrong gas cut-off prevention electronic safety monitor | |
CN110031509A (en) | Hangar high-pressure water mist fire-extinguishing experimental provision | |
CN108918355A (en) | A kind of appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter | |
CN204637376U (en) | Water-based fire protection system intelligent response and scattering mechanism | |
CN211553891U (en) | Fire retardant performance combustion packing box for fireproof coating | |
CN221506835U (en) | Classifying device for dust combustion danger |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CP01 | Change in the name or title of a patent holder | ||
CP01 | Change in the name or title of a patent holder |
Address after: 200062 Shanghai city Putuo District Yunling Road No. 345 Co-patentee after: Shanghai Chemical Institute Testing Co., Ltd. Patentee after: Shanghai Chemical Research Institute Co., Ltd. Address before: 200062 Shanghai city Putuo District Yunling Road No. 345 Co-patentee before: Shanghai Tianke Chemical Detection Co., Ltd. Patentee before: Shanghai Chemical Research Institute Co., Ltd. |