CN105709904A - Uniform type micro-sample grinding device - Google Patents
Uniform type micro-sample grinding device Download PDFInfo
- Publication number
- CN105709904A CN105709904A CN201610070772.1A CN201610070772A CN105709904A CN 105709904 A CN105709904 A CN 105709904A CN 201610070772 A CN201610070772 A CN 201610070772A CN 105709904 A CN105709904 A CN 105709904A
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- Prior art keywords
- grinding
- friction driven
- type micro
- uniform type
- fixing
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2866—Grinding or homogeneising
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to a uniform type micro-sample grinding device. The uniform type micro-sample grinding device comprises a base, a frequency conversion drive motor arranged on the base, a main drive wheel in transmission connection with the frequency conversion drive motor, a plurality of friction driven units and a plurality of grinding mechanisms, wherein the friction driven units are evenly arranged on the periphery of the main drive wheel in the circumferential direction, and the grinding mechanisms correspond to the friction driven units in a one-to-one manner. Each friction driven unit is in transmission connection with the corresponding grinding mechanism through a crankshaft flexible unit. Under driving of the frequency conversion drive motor, the main drive wheel drives the friction driven units to rotate, the crankshaft flexible units rotate along with the rotation of the friction driven units, and the grinding mechanisms are driven to conduct grinding. Compared with the prior art, the uniform type micro-sample grinding device is simple and compact in integral structure, economical, practical and convenient to operate; efficient and balanced grinding is achieved, and the consistency of extraction results in the grinding and sample manufacturing process is guaranteed; and the uniform type micro-sample grinding device is safe, reliable, suitable for different samples and wide in application range and has very good application prospects.
Description
Technical field
The invention belongs to technical field of mechanical design, relate to a kind of lapping device, especially relate to a kind of uniformly type micro sample lapping device.
Background technology
Now, analytical tool kind gets more and more, and function is also more powerful, and sensitivity is higher, and detection limit is more and more lower, and specimen in use amount only has several grams even tens milligrams or less, and the uniformity of sample preparation and representativeness are just proposed bigger requirement by this.Theoretical, sample particle is more little, and its uniformity and representativeness are more good.At present, grinding for a small amount of sample, also lacking applicable lapping device, how based on hand lapping operation, the labor intensity of manual operation process is big, inefficiency, meanwhile, the uniformity of underhand polish is poor, and the effect of grinding is relatively difficult to ensure that, for this, develop a kind of micro-example lapping device efficiently, being suitable for very necessary.
The Chinese invention patent that Authorization Notice No. is CN202447149U discloses a kind of high throughput micro-scale grinder, including high flux adapter, grinding pot, casing, a bent axle and two clamping devices；Being provided with converter in casing, base is fixed with main, main platform is provided with the motor being connected with converter；One end of bent axle is connected with the outfan of motor, and the eccentric shaft part of bent axle is provided with a rocking arm, and rocking arm has two overhanging ends, and the other end of bent axle is connected to a linkage platform；Linkage platform is provided with bent axle axis hole and a location division；Each clamping device includes jaws parts and connecting rod；The rear end of connecting rod is hinged with an overhanging end of rocking arm, and the middle part of connecting rod is connected with the location division in linkage platform by rotational pin, and the front end of connecting rod is connected with jaws parts；Jaws parts include concave shape crotch, clamping element and self lock button.The technical scheme of above-mentioned patent disclosure is avoided that complete machine resonates under waving at a high speed, it is achieved penetration quality dynamic balances, but device overall structure is complex, and cost of manufacture is higher, and once grinds and for simple sample, can only grind work efficiency and need to be improved further.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and a kind of simple in construction is provided, compact, economical and practical, operation rapid and convenient, can once realize multiple samples are carried out the uniform type micro sample lapping device of quickly grinding, and then effectively overcome the technical problem that underhand polish lack of homogeneity, grinding effect be difficult to ensure that.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of uniformly type micro sample lapping device, this device includes base, it is arranged on the variable frequency drive motors on base, the main drive wheel being in transmission connection with variable frequency drive motors, along the circumferential direction uniformly it is laid in the multiple friction driven unit around main drive wheel and the grinding mechanism arranged with multiple friction driven unit one_to_one corresponding, it is in transmission connection by bent axle flexible unit between each friction driven unit and corresponding grinding mechanism, under the driving of variable frequency drive motors, main drive wheel band dynamic friction driven unit rotates, bent axle flexible unit rotates with, and drive grinding mechanism to be ground.
Being provided with tensioning spring between adjacent two friction driven unit, described friction driven unit is laid in around main drive wheel by tensioning spring tensioning in the form of a ring.
Described tensioning spring can ensure that when main drive wheel rotates, and drives each friction driven unit synchronous axial system.
Described friction driven unit is provided with 4-10 altogether.
Preferably, described friction driven unit is provided with 8 altogether.
Described friction driven unit includes the friction driven pulley with main drive wheel Elastic Contact, installs column and is arranged on the wheel folder installed on column, described friction driven pulley is determined to be connected by fixing axle is clamping with wheel, is connected by tensioning spring between adjacent two friction driven pulleys.
Preferably, described wheel folder is rocker-arm wheel folder, this rocker-arm wheel folder includes jig arm and fixes the rocking arm being connected with jig arm, described jig arm offers the fixing axle installing hole suitable with fixing axle, described rocking arm offers the column installing hole suitable with installing column.During installation, rocker-arm wheel folder is set on the top boss installing column by column installing hole fixing.
Preferably, described friction driven pulley is colloid friction driven pulley.
Described bent axle flexible unit includes top to be fixed the bent axle being connected and is arranged on the flexible spring of bent axle bottom with fixing axle.
Preferably, described bent axle top is provided with straight part, and is connected by straight part and fixing axle are fixing.
Described grinding mechanism include top fix with flexible spring the grinding rod being connected and with grinding rod with the use of grinding cup.
The abradant surface of described grinding cup is parabolic shape abradant surface, it is ensured that during grinding grinding rod with the cup of grinding cup at the bottom of and wall of cup be fully contacted, it is achieved effectively grind.
The size of described grinding cup should be suitable with the size of fixing hole and grinding rod, it is ensured that grinding cup spacing and dismounting, and ratio rational with grinding rod, and wherein, the ratio of the diameter of described grinding rod and the base diameter of grinding cup should control as 1:3-5.
Described base is further opened with the fixing hole for fixing grinding cup.
Described main drive wheel is in transmission connection by driving axle and variable frequency drive motors.
When actually used, the sample size added in grinding cup should cover bottom the cup of grinding cup, but less than 1/4th of grinding cup volume, the volume adding water should less than the volume adding sample.Wash water amount is not limit, and can repeatedly add, and is as the criterion until grinding cup and grinding rod being rinsed well.
In the present invention, the rotating speed of described main drive wheel can be regulated in time by the rotating speed of adjustment variable frequency drive motors, described friction driven unit is distributed on around main drive wheel, connected by tensioning spring tensioning in the form of a ring, it is ensured that main drive wheel is sufficiently flexible with the friction driven pulley in friction driven unit to be contacted.When main drive wheel rotates, band dynamic friction driven pulley synchronous axial system.Main drive wheel and friction driven pulley surface need suitably coarse, to provide main drive wheel to rotate required frictional force with dynamic friction driven pulley.
The described friction driven pulley in friction driven unit is fixed on wheel folder, is connected flexible spring and grinding rod by bent axle.When grinding rod inserts grinding cup, and after putting into water and sample, when the driven pulley that rubs rotates, because of the combined effect of bent axle and flexible spring, grinding rod does circumferential motion by being close at the bottom of the wall of cup of grinding cup and cup, imitates the sight of hand lapping operation.Owing to friction driven pulley forms ring-type by tensioning spring, and then ensure that each friction driven pulley stress is consistent, so, during grinding, the rotating speed of each grinding rod is also identical with dynamics.
Compared with prior art, the invention have the characteristics that:
1) the true mode of operation imitating hand lapping, is rotated by crankshaft eccentric and forms the power of scratching to wall of cup that grinding rod circular motion applies with flexible spring and combine to the pressure at the bottom of cup, and reach optimum efficiency by adjustment rotating speed and tension force；
2) can uniformly grinding multiple sample, main drive wheel is symmetrical band dynamic friction driven pulley simultaneously, and friction driven pulley is applied equal power by the tensioning spring forming ring-type simultaneously, it is ensured that dynamics is consistent with rotating speed, reaches identical grinding effect；
3) do not lose sample, can reclaim completely by rinsing, it is ensured that extract the concordance of result and the accuracy of detection；
4) overall structure is simple, compact, economical and practical, easy to operate, it is possible in the same time, multiple samples to be ground, be effectively increased grinding efficiency, realize efficiently balancedly grinding, ensure that grinding sample making course extracts the concordance of result, safe and reliable, it is applicable to different sample, use scope is wide, has good application prospect.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of embodiment 1；
Fig. 2 is embodiment 1 plan structure schematic diagram；
Fig. 3 is the cross section structural representation taking turns folder in embodiment 1；
Fig. 4 is the plan structure schematic diagram taking turns folder in embodiment 1；
Description of symbols in figure:
1 base, 2 variable frequency drive motors, 3 drive axles, 4 main drive wheels, 5 tensioning springs, 6 friction driven pulleys, 7 take turns folder, 71 jig arm, 72 rocking arms, 73 fixing axle installing holes, 74 column installing holes, 8 columns, 9 bent axles, 10 flexible spring, 11 grinding rods, 12 grinding cups, 13 fixing holes be installed, 14 fix axles.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1:
As shown in Figure 1-2, a kind of uniformly type micro sample lapping device, this device includes base 1, it is arranged on the variable frequency drive motors 2 on base 1, the main drive wheel 4 being in transmission connection with variable frequency drive motors 2, along the circumferential direction uniformly it is laid in the multiple friction driven unit around main drive wheel 4 and the grinding mechanism arranged with multiple friction driven unit one_to_one corresponding, it is in transmission connection by bent axle flexible unit between each friction driven unit and corresponding grinding mechanism, under the driving of variable frequency drive motors 2, main drive wheel 4 band dynamic friction driven unit rotates, bent axle flexible unit rotates with, and drive grinding mechanism to be ground；Being further opened with the fixing hole 13 for fixing grinding cup 12 on base 1, main drive wheel 4 is in transmission connection by driving axle 3 and variable frequency drive motors 2.
Wherein, friction driven unit is provided with 8, is provided with tensioning spring 5 between adjacent two friction driven unit, and friction driven unit is laid in around main drive wheel 4 by tensioning spring 5 tensioning in the form of a ring.Tensioning spring 5 can ensure that when main drive wheel 4 rotates, and drives each friction driven unit synchronous axial system.
Friction driven unit includes the friction driven pulley 6 with main drive wheel 4 Elastic Contact, installs column 8 and is arranged on the wheel folder 7 installed on column 8, and friction driven pulley 6 is connected by fixing axle 14 is fixing with wheel folder 7.When actual installation, connected by tensioning spring 5 between adjacent two friction driven pulleys 6.
Wherein, wheel folder 7 is rocker-arm wheel folder, and this rocker-arm wheel folder includes jig arm 71 and the rocking arm 72 that be connected fixing with jig arm 71, jig arm 71 offers the fixing axle installing hole 73 suitable with fixing axle 14; offer the column installing hole 74 suitable with installing column 8 on rocking arm 72, as shown in Figure 3-4.During installation, rocker-arm wheel folder is set on the top boss installing column 8 by column installing hole 74 fixing.
Bent axle flexible unit includes top and the fixing fixing bent axle 9 being connected of axle 14 and the flexible spring 10 being arranged on bent axle 9 bottom.Wherein, bent axle 9 top is provided with straight part, and is connected by straight part is fixing with fixing axle 14.
Grinding mechanism include the fixing grinding rod 11 being connected of top and flexible spring 10 and with grinding rod 11 with the use of grinding cup 12, the abradant surface of this grinding cup 12 is parabola shaped abradant surface, ensure grind time grinding rod 11 with the cup of grinding cup 12 at the bottom of and wall of cup be fully contacted, it is achieved effectively grind.When actual design, the size of grinding cup 12 should be suitable with the size of fixing hole 13 and grinding rod 11, it is ensured that the spacing and dismounting of grinding cup 12, and ratio rational with grinding rod 11.
When actually used, the rotating speed of main drive wheel 4 can be regulated in time by the rotating speed of adjustment variable frequency drive motors 2, friction driven unit is distributed on around main drive wheel 4, connected by tensioning spring 5 tensioning in the form of a ring, it is ensured that main drive wheel 4 is sufficiently flexible with the friction driven pulley 6 in friction driven unit to be contacted.When main drive wheel 4 rotates, band dynamic friction driven pulley 6 synchronous axial system.Main drive wheel 4 and friction driven pulley 6 surface need suitably coarse, to provide main drive wheel 4 to rotate required frictional force with dynamic friction driven pulley 6.
Friction driven pulley 6 in friction driven unit is fixed on wheel folder 7, is connected flexible spring 10 and grinding rod 11 by bent axle 9.When grinding rod 11 inserts grinding cup 12, and after putting into water and sample, when the driven pulley 6 that rubs rotates, because of the combined effect of bent axle 9 and flexible spring 10, grinding rod 11 does circumferential motion by being close at the bottom of the wall of cup of grinding cup 12 and cup, imitates the sight of hand lapping operation.Owing to friction driven pulley 6 forms ring-type by tensioning spring 5, and then ensure that each friction driven pulley 6 stress is consistent, so, during grinding, the rotating speed of each grinding rod 11 is also identical with dynamics.
Specifically, sample grinds in sample making course, is first taken off by eight groups of grinding cups 12, and 12 addition sample to be ground and a small amount of water in grinding cup, then the grinding cup 12 that will be equipped with sample and water respectively is arranged in fixing hole 13.Start variable frequency drive motors 2, regulate rotating speed to setting value, drive eight groups of colloid friction driven pulley 6 synchronous axial system by main drive wheel 4.Rotating of eight groups of colloid friction driven pulleys 6 will pass through corresponding bent axle 9 and flexible spring 10 so that grinding rod 11 moves in a circle at the wall of cup of grinding cup 12, constantly grinds added sample.Tensioning spring 5 and colloid friction driven pulley 6 tensioning in the form of a ring, it is ensured that the power of each colloid friction driven pulley 6 rotating speed and applying is essentially identical so that each grinding rod 11 grinding rate is always maintained at consistent with dynamics.
After reaching grinding requirement, closing variable frequency drive motors 2, make main drive wheel 4 and eight groups of colloid friction driven pulleys 6 stop operating, grinding rod 11 quits work.Finally rinse eight groups of grinding rods 11 and grinding cup 12 with water respectively, then the liquid under grinding the good sample of pretreatment and rinsing all is removed, be simultaneously achieved the milling and extracting to eight groups of samples and process.
The present embodiment overall structure is simple, compact, can truly imitate the mode of operation of hand lapping, formed, by bent axle 9 eccentric rotary, the power of scratching to wall of cup that grinding rod 11 circular motion applies with flexible spring 10 and combine to the pressure at the bottom of cup, and reach optimum efficiency by regulating rotating speed and tension force, namely adjustment of rotational speed completes by changing variable frequency drive motors 2, and tension adjustment realizes by changing the flexible spring 10 of differential tension.
Embodiment 2:
In the present embodiment, friction driven unit is provided with 10, and all the other are with embodiment 1.
Embodiment 3:
In the present embodiment, friction driven unit is provided with 6, and all the other are with embodiment 1.
Embodiment 4:
In the present embodiment, friction driven unit is provided with 4, and all the other are with embodiment 1.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and use invention.These embodiments obviously easily can be made various amendment by person skilled in the art, and General Principle described herein is applied in other embodiments without through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art's announcement according to the present invention, the improvement made without departing from scope and amendment all should within protection scope of the present invention.
Claims (10)
1. a uniform type micro sample lapping device, it is characterized in that, this device includes base (1), it is arranged on the variable frequency drive motors (2) on base (1), the main drive wheel (4) being in transmission connection with variable frequency drive motors (2), along the circumferential direction uniformly it is laid in the multiple friction driven unit around main drive wheel (4) and the grinding mechanism arranged with multiple friction driven unit one_to_one corresponding, it is in transmission connection by bent axle flexible unit between each friction driven unit and corresponding grinding mechanism, under the driving of variable frequency drive motors (2), main drive wheel (4) band dynamic friction driven unit rotates, bent axle flexible unit rotates with, and drive grinding mechanism to be ground.
2. the uniform type micro sample lapping device of one according to claim 1, it is characterized in that, being provided with tensioning spring (5) between adjacent two friction driven unit, described friction driven unit is laid in main drive wheel (4) around by tensioning spring (5) tensioning in the form of a ring.
3. the uniform type micro sample lapping device of one according to claim 2, it is characterised in that described friction driven unit is provided with 4-10 altogether.
4. the uniform type micro sample lapping device of one according to claim 2, it is characterized in that, described friction driven unit includes the friction driven pulley (6) with main drive wheel (4) Elastic Contact, installs column (8) and is arranged on wheel folder (7) installed on column (8), described friction driven pulley (6) is connected by fixing axle (14) and wheel folder (7) are fixing, is connected by tensioning spring (5) between adjacent two frictions driven pulley (6).
5. the uniform type micro sample lapping device of one according to claim 4, it is characterized in that, described wheel folder (7) is rocker-arm wheel folder, this rocker-arm wheel folder includes jig arm (71) and the rocking arm (72) that be connected fixing with jig arm (71), described jig arm (71) offers the fixing axle installing hole (73) suitable with fixing axle (14), described rocking arm (72) offers the column installing hole (74) suitable with installing column.
6. the uniform type micro sample lapping device of one according to claim 4, it is characterized in that, described bent axle flexible unit includes top and the fixing bent axle (9) being connected of fixing axle (14) and the flexible spring (10) being arranged on bent axle (9) bottom.
7. the uniform type micro sample lapping device of one according to claim 6, it is characterized in that, described grinding mechanism include the fixing grinding rod (11) being connected of top and flexible spring (10) and with grinding rod (11) with the use of grinding cup (12).
8. the uniform type micro sample lapping device of one according to claim 7, it is characterised in that the abradant surface of described grinding cup (12) is parabola shaped abradant surface.
9. the uniform type micro sample lapping device of one according to claim 8, it is characterised in that be further opened with the fixing hole (13) for fixing grinding cup (12) on described base (1).
10. a kind of uniformly type micro sample lapping device according to any one of claim 1 to 9, it is characterised in that described main drive wheel (4) is in transmission connection by driving axle (3) and variable frequency drive motors (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610070772.1A CN105709904B (en) | 2016-02-01 | 2016-02-01 | A kind of uniform type micro sample lapping device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610070772.1A CN105709904B (en) | 2016-02-01 | 2016-02-01 | A kind of uniform type micro sample lapping device |
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| CN105709904A true CN105709904A (en) | 2016-06-29 |
| CN105709904B CN105709904B (en) | 2017-10-31 |
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| CN201610070772.1A Active CN105709904B (en) | 2016-02-01 | 2016-02-01 | A kind of uniform type micro sample lapping device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107876177A (en) * | 2016-09-30 | 2018-04-06 | 财团法人工业技术研究院 | Grinding machine and micro-rotation device |
| CN108271994A (en) * | 2018-03-29 | 2018-07-13 | 贵州金家食品有限公司 | A kind of beef stir-frying device |
| CN108627370A (en) * | 2017-03-20 | 2018-10-09 | 深圳华因康基因科技有限公司 | Emulsion preparing instrument |
| CN110567768A (en) * | 2018-06-05 | 2019-12-13 | 安徽省农业科学院蚕桑研究所 | Single moth grinder for detecting silkworm corpuscle disease mother moth |
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| CN2778383Y (en) * | 2005-03-17 | 2006-05-10 | 戍恩鹏 | Pounding machine |
| JP2008083018A (en) * | 2006-09-26 | 2008-04-10 | Mamiko Isokami | Homogenizer for pretreatment of solid and/or plant specimen |
| CN101437619A (en) * | 2006-03-10 | 2009-05-20 | 生物质转化有限公司 | Disruptor system for dry cellulosic materials |
| JP2011218241A (en) * | 2010-04-02 | 2011-11-04 | National Institute For Agro-Environmental Science | Pulverizing machine |
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| CN2192385Y (en) * | 1993-01-13 | 1995-03-22 | 南昌市郊冶金实验设备厂 | Crusher with small-weight 6 mortar preparation sample |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107876177A (en) * | 2016-09-30 | 2018-04-06 | 财团法人工业技术研究院 | Grinding machine and micro-rotation device |
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| CN108627370A (en) * | 2017-03-20 | 2018-10-09 | 深圳华因康基因科技有限公司 | Emulsion preparing instrument |
| CN108271994A (en) * | 2018-03-29 | 2018-07-13 | 贵州金家食品有限公司 | A kind of beef stir-frying device |
| CN110567768A (en) * | 2018-06-05 | 2019-12-13 | 安徽省农业科学院蚕桑研究所 | Single moth grinder for detecting silkworm corpuscle disease mother moth |
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| Publication number | Publication date |
|---|---|
| CN105709904B (en) | 2017-10-31 |
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Address after: 200062 Shanghai city Putuo District Yunling Road No. 345 Applicant after: Shanghai Chemical Research Institute Co., Ltd. Applicant after: Shanghai Tianke Chemical Detection Co., Ltd. Address before: 200062 Shanghai city Putuo District Yunling Road No. 345 Applicant before: Shanghai Research Institute of Chemical Industry Applicant before: Shanghai Tianke Chemical Detection Co., Ltd. |
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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. |
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