CN201788154U - Bentonite methylene blue absorption amount testing device - Google Patents
Bentonite methylene blue absorption amount testing device Download PDFInfo
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- CN201788154U CN201788154U CN2010201274896U CN201020127489U CN201788154U CN 201788154 U CN201788154 U CN 201788154U CN 2010201274896 U CN2010201274896 U CN 2010201274896U CN 201020127489 U CN201020127489 U CN 201020127489U CN 201788154 U CN201788154 U CN 201788154U
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Abstract
The utility model discloses a bentonite methylene blue absorption amount testing device belonging to an automatic testing device and solving the problem that the testing process of the existing testing device is prolonged as the operation is more complex and the dripping can be possibly carried out repeatedly. The bentonite methylene blue absorption amount testing device comprises a stirring component, a liquid shifting component, a dripping component, a stepping rotation component, an image acquisition component and a processor. The testing device is formed by utilizing components such as a peristaltic pump, an electromagnetic stirrer and a minitype stepping motor and the like that are matured in the market, is simple in structure and convenient to operate, and is used for testing the bentonite methlene blue absorption amount and effective bentonite content in clay and used sand on a cast production line; and for the testing device, the initial dripping-in amount valve can be manually input, fully-automatic setting and running are achieved, the automatic acquisition on dripping spot image and the judgment on the final dripping terminal can be achieved, the bentonite methylene blue absorption amount and the effective bentonite content in the clay and used sand can be automatically calculated, the result is accurate, the labor intensity of experimental staffs is lightened, and the accuracy for judging the dripping terminal can be improved.
Description
Technical field
The utility model belongs to automatic test device, is specifically related to a kind of bentonite blue suction quantity proving installation.
Background technology
During the clay-bonded sand mold casting is produced, can adsorb dyestuffs such as methylene blue according to containing montmorillonite mineral in the bentonitic clay, effective bentonite content that dust, sand grains, the no cohesive action materials such as invalid bentonitic clay that are scorched to death then do not adsorb or the characteristic of minute quantity absorption methylene blue dye is carried out in the old sand is measured.
At present, the assay method of the absorption methylene blue dye amount of clay old sand has three kinds:
First method be according to " casting handbook Modeling Material volume (and on) the national standard detection method, adopt pure manual titration.Its test procedure is: take by weighing oven dry sample 5g, add massfraction respectively and be 1% sodium pyrophosphate solution 20mL and distilled water 50mL, rock even back heated and boiled 5min on electric furnace, be cooled to room temperature in air, splashing into massfraction with buret is 0.2% methylene blue solution.During titration, can add for the first time expectation the methylene blue solution amount about 2/3, each later on 1-2mL that drips.The method of check terminal point is, drip methylene blue solution at every turn after, rock 30s, dip in a test solution on the middling speed quantitative filter paper with glass bar, observe around the dark blue color dot of central authorities, to have or not and nattier blue halo occurs, if occur, continue to drip methylene blue solution.Like this repeatable operation, when beginning light blue halo to occur, test solution left standstill 1min after, dip in a test solution with glass bar again,, illustrate and do not arrive terminal point if do not occur nattier blue halo again all around, should drip methylene blue solution again, be test endpoint up to tangible light blue halo occurring.[casting branch of Chinese Mechanical Engineering Society compiles. casting handbook (4) [M]. and Beijing: China Machine Press, 2002.]
The test speed of this method is slow, the time is long, and test result relies on unaided eye discrimination, and precision is not high.
Second method is to utilize SND type methylene blue clay analyzer, and this instrument comprises sample dispersion treatment device and titration parts, adopts ultrasonic scattering method dispersion treatment sample, adopts automatic buret, and cooperative mechanical stirs.(casting branch of Chinese Mechanical Engineering Society compiles. casting handbook (4) [M]. and Beijing: China Machine Press, 2002.) this instrument employing semi-hand half mechanical test, the manual operation inflatable ball, its operating process and above-mentioned first method process are similar, different is to make manually to control the manual titration in the first method into inflatable ball to produce air pressure, utilize air pressure to control titer, realize semi-automatic titration, the craft after the titration is rocked test solution and is made the mechanical raking test solution into.This method adopts manual control air pressure to carry out titration, artificial observation titration value, and titer and observed reading all are easy to generate error, and the same with pure manual titration, and net result is judged the dependence naked eyes, and precision is not high.
The third method is automatic analysis and detection instrument for bentonite blue suction quantity and the detection method thereof that the people such as Ren Ruichen of Liaoning Project Technology University propose, (number of patent application: 200810013428.4, patent publication No.: CN101493451A), this analyser is made up of automatic titration system, sampling system and Color Recognition System, the same with the SND type tester in the second method, adopt ultrasonic dispersing to handle the bentonitic clay sample.This instrument can robotization detect bentonite blue suction quantity, adopt the amount of splashing into of interactive system control methylene blue, its Color Recognition System adopts given color calibration, under the fluorescence irradiation, sensor is dripped spot and the light green color halo whether occurred, and with given color calibration to recently judging titration end-point.The titration process of whole instrument has used 5 stepper motors altogether, and the operation with control crossbearer and two telescopic rods comprises the rotation of crossbearer and sliding up and down of expansion link.In general, the testing tool of the third method and method can realize that basically robotization detects, the test result precision is also higher relatively, but the whole order of instrument operational process is complicated, in driven by motor telescopic rod mechanical movement process, drop on the expansion link has the possibility of drippage in advance, can cause situations such as sky drips.
Summary of the invention
The utility model provides a kind of bentonite blue suction quantity proving installation, solves complexity of existing detector operation, the problem that may repeat titration, cause test process to prolong.
A kind of bentonite blue suction quantity proving installation of the present utility model comprises stirring, moves liquid, titration, stepping rotation, image acquisition component and processor, it is characterized in that:
Described mixing component is made up of magnetic stirrer and resistance wire, is fixed on the brace table, and resistance wire is positioned under the magnetic stirrer pallet, its role is to initial stage heating clay old sand mixed aqueous solution, and the bentonitic clay in the old sand is well-dispersed in the mixed solution; Later stage stirs the old sand mixed aqueous solution that has splashed into methylene blue, and solution fully is uniformly dispersed;
The described liquid parts that move, form by first peristaltic pump, first transfer pipet and reagent container, first peristaltic pump is fixed in first vertical rod of brace table, first transfer pipet places the draw-in groove of first peristaltic pump, the first transfer pipet lower end is fixed by first cross bar that is fixed on first vertical rod, and the first transfer pipet internal diameter is 0.8～1.6mm; Its role is to the concentration in the reagent container is that 0.2% pure methylene blue solution quantitatively pipettes to the sample receiver that clay old sand sample mixed aqueous solution is housed;
Described titration parts, by second peristaltic pump, second transfer pipet and sample receiver are formed, second peristaltic pump is fixed in second vertical rod of brace table, second transfer pipet places the draw-in groove of second peristaltic pump, two ends are fixed by first cross bar and second cross bar that is fixed on second vertical rod respectively, second peristaltic pump has reverse system, the second transfer pipet internal diameter is 0.6～1.2mm, its role is to clay old sand in the sample receiver and methylene blue mixed solution are titrated on the middling speed quantitative filter paper sheet that places on the stepping rotatable parts, after one of the titration, reverse system oppositely pushes back the solution in second transfer pipet in the sample receiver;
Described stepping rotatable parts, form by turntable and stepper motor two parts, be fixed in second vertical rod outside on the brace table, stepper motor is positioned at the turntable below, is connected by gear with turntable, the stepping of control turntable is rotated, its role is to after automatic titration is finished, under stepper motor drove, the middling speed quantitative filter paper sheet that the turntable band on the turntable table top turned an angle, make drip spot place image acquisition component under, be convenient to the collection of image;
Described image acquisition component, be made up of digital industrial camera and annular light source, be fixed in by fixed head in the 3rd vertical rod of brace table, digital industrial camera is fixed in the annular light source center, drip the spot image under the harvester on the middling speed quantitative filter paper sheet, and image is transmitted back processor;
Described processor is connected with first peristaltic pump, magnetic stirrer, second peristaltic pump, stepper motor and digital industrial camera electric signal by data line; Processor plug-in control module and image processing module, described program controling module is controlled following process in regular turn: the A. mixing component is to sample solution heating, stirring; B. start first peristaltic pump, controlled for the first peristaltic pump working time, quantitatively pipette reagent in the reagent container to sample receiver; C. start magnetic stirrer and stir sample solution; D. start second peristaltic pump, pipette the solution in the sample receiver, solution of titration on turntable; E. second peristaltic pump counter-rotating oppositely pushes back sample receiver with the sample solution in second transfer pipet; F. start image acquisition component, the spot image under the collection industrial camera, and be transferred to image processing module; Whether the calculation process result's decision according to image processing module continues operational process B～F;
Described image processing module carries out calculation process to dripping the spot image, determines the effective bentonite content value in the clay old sand to be measured.
When image processing module of the present utility model carried out calculation process to dripping the spot image, order comprised following process:
1. the spot picture breakdown of dripping that will collect becomes red, green and blue triple channel image;
2. red, green and blue triple channel image are carried out the gray-scale value subtraction, obtain the light blue halo in outer ring:
Gray values of pixel points in the red channel image is deducted the gray-scale value of corresponding pixel points in the green channel image, carries out following computing again, obtain transfer image acquisition, its gray values of pixel points P:
P＝α×(R-G)+β，α＝0.1～3，β＝0～256；
Gray values of pixel points in the transfer image acquisition is deducted the gray-scale value of corresponding pixel points in the blue channel image, carries out following computing again, obtain the light blue halo in outer ring, its gray values of pixel points Q:
Q＝γ×(P-B)+λ，γ＝0.1～3，λ＝0～256；
In the formula: R, G, B represent the gray values of pixel points in redness, green and the blue triple channel respectively, and when a spot image effect was dark partially, α and γ span were at 1～3, and a spot image is dark more, and value is big more; When a spot figure kine bias was bright, α and γ span were at 0.1～1, and a spot image is bright more, and value is more little;
β＝α×|(R-G)|
min，λ＝γ×|(P-B)|
min；
3. fill and obtain complete spot image:
According to the light blue halo gray values of pixel points in outer ring, use filling algorithm the ring inner region of the light blue halo in described outer ring is filled, obtain complete spot image R
F
4. calculate the area ratio of light blue halo in outer ring and inner ring mazarine spot:
The area S of the light blue halo in outer ring
QArea S with inner ring mazarine spot
DBe respectively:
S
Q＝f(d)×∫S
Q(d)，
S
D＝S
F-S
Q，
Wherein, S
FArea for complete spot:
S
F＝f(d)×∫S
F(d)，
The area of light blue halo in outer ring and inner ring mazarine spot than T is:
T＝S
Q/S
D，
In the formula: d is the resolution of digital camera, and f (d) is the single elemental area under the corresponding digital camera resolution, ∫ S
Q(d) be the number of outer ring pixel that light blue halo comprises, ∫ S
F(d) for comprising the number of pixel in the complete spot region;
5. whether the area of judging described light blue halo and inner ring mazarine spot more than or equal to 15%, is then to turn over journey 6 than T, otherwise advising process control module operational process B～F;
6. the advising process control module stops titration process, and calculates effective bentonite content;
At first, calculate and always move liquid measure value V according to each working time of first peristaltic pump:
V＝V
1+V
2+……V
i+……+V
N，
In the formula, V
iBe the liquid measure of moving of the first peristaltic pump i task time correspondence, i is a natural number; Always move liquid measure value V and be bentonite blue suction quantity; If the effective bentonite content of test clay old sand is then proceeded process 7;
7. according to always moving the corresponding interval range that liquid measure value V judges effective bentonite content, determine corresponding titrimetric factor K and titration constant B,, calculate effective bentonitic clay quality percentage composition M=(V-B)/K K, B substitution following formula,
B, K are following to be determined: get fresh sand and bentonitic recombined sample 5g, measure bentonitic clay quality percentage composition in the recombined sample and be respectively 2%, 4%, 6%, 8% and blue the measuring of suction of 10% o'clock recombined sample, draw bentonitic clay standard titration curve; Rate of curve and y y-intercept when the corresponding interval of calculating bentonitic clay quality percentage composition is (2%, 4%), (4%, 6%), (6%, 8%) and (8%, 10%) are respectively corresponding interval titrimetric factor K and titration constant B.
When the ring inner region of the light blue halo in described outer ring was filled, the various filling algorithms that conventional images is handled all were suitable for, as line sweep filling algorithm, four-way connected region seed fill algorithm, eight to the connected region seed fill algorithm; Can be referring to Sun Jiaguang etc. computer graphics (third edition) [M]. Beijing: publishing house of Tsing-Hua University, 1998.
When utilizing the effective bentonite content of the utility model test bentonite blue suction quantity and clay old sand, comprise the steps: that (1) will be equipped with the sample receiver of clay old sand sample mixed aqueous solution and be placed on the mixing component, it is even that heating is dispersed to solution; (2) after solution is cooled to room temperature, moves the liquid parts and quantitatively pipette methylene blue solution in the reagent container to sample receiver, mixing component stirs simultaneously; (3) the titration parts pipette mixed solution titration in the sample receiver to the filter paper of stepping rotatable parts tops; (4) after one of the titration, the stepping rotatable parts turn an angle, and drip the spot image under image collecting device is gathered, and will drip the spot image and transfer to processor; (5) processor carries out data processing, comparison to dripping the spot image; (6) repeat (2) (3) (4) (5) step, finally determine titration end-point.
The utility model utilizes peristaltic pump ripe on the market, element such as magnetic stirrer and small type stepping motor makes up, simple in structure, easy to operate, measure at the bentonite blue suction quantity in the clay old sand on the foundry production line and effective bentonite content, can import manually and initially splash into value, the full-automatic setting and operation, automatically gather and drip the spot image and judge final titration end-point, can calculate effective bentonite content in blue amount of bentonitic suction and the clay old sand automatically, the result is accurate, alleviate experimenter's labour intensity, improved the accuracy of judging titration end-point.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the vertical view of Fig. 1.
Embodiment
As shown in Figure 1 and Figure 2, the utility model comprises stirring, moves liquid, titration, stepping rotation, image acquisition component and processor 20, and each several part is loaded in the airtight shell body 2;
Mixing component is made up of magnetic stirrer 8 and resistance wire, is fixed on the brace table 1, and resistance wire is positioned under magnetic stirrer 8 pallets, and corresponding mixing component position is equipped with first sliding gate 22 on the shell body 2;
Move the liquid parts, form by first peristaltic pump 6, first transfer pipet 5 and reagent container 3, first peristaltic pump 6 is fixed in first vertical rod 7 of brace table, first transfer pipet 5 places the draw-in groove of first peristaltic pump, the first transfer pipet lower end is fixing by first cross bar 4 that is fixed on first vertical rod, and corresponding reagent container 3 positions are equipped with second sliding gate 23 on the shell body 2;
The titration parts, form by second peristaltic pump 11, second transfer pipet 10 and sample receiver 9, second peristaltic pump 11 is fixed in second vertical rod 12 of brace table, second transfer pipet 10 places the draw-in groove of second peristaltic pump, two ends are fixing with second cross bar 13 that is fixed on second vertical rod by first cross bar 4 respectively, and second peristaltic pump has reverse system;
First transfer pipet, 5 internal diameters can be 0.6～1.2mm for 0.8～1.6mm, second transfer pipet, 10 internal diameters;
The stepping rotatable parts are made up of turntable 19 and stepper motor 14 two parts, are fixed in second vertical rod, 12 outsides on the brace table, and stepper motor 14 is positioned at the turntable below, are connected by gear with turntable, and the stepping of control turntable 19 is rotated; Corresponding turntable 19 positions are equipped with the 3rd sliding gate 24 on the shell body 2;
Image acquisition component, form by digital industrial camera 17 and annular light source 18, be fixed in by fixed head 16 in the 3rd vertical rod 15 of brace table 1, digital industrial camera is fixed in the annular light source center, drip the spot image under the harvester on the middling speed quantitative filter paper sheet, and image is transmitted back processor;
Image processing module carries out calculation process to dripping the spot image, determines the effective bentonite content value in the clay old sand to be measured.
Embodiment 1: the effective bentonite content of clay old sand is measured
At first will push away on first sliding gate 22, second sliding gate 23, the 3rd sliding gate 24, the 5g old sand, the massfraction that configure will be housed respectively be the sample receiver 9 of mixed solution of 1% sodium pyrophosphate solution 20mL and distilled water 50mL and middling speed quantitative filter paper sheet be positioned on the mixing component 8 with turntable 19 on, self-check of device, startup, on the control program interface of processor 20 input for the first time, for the second time, the methylene blue amount of splashing into 80ml for the third time, 3ml and 2ml, heated and stirred sample 10min mixes to solution, after the cooling.Moving liquid parts 6 starts working, internal diameter is that first transfer pipet 5 of 0.8mm quantitatively moves into the 80ml methylene blue solution from reagent container 3 in sample receiver 9, mixing component 8 starts the stirring sample synchronously when moving liquid, after titration is finished and is stirred 5s again, stop to stir, sample leaves standstill 10s, titration parts 11 start, internal diameter is that second transfer pipet 10 of 0.6mm pipettes sample and carries out titration from sample receiver 9, after one, the internal pump counter-rotating of titration parts 11 pushes back sample plasma bottle with the sample in second transfer pipet 10, and stepper motor 14 drive turntables 19 and middling speed quantitative filter paper sheet placed on it rotate 30 ° simultaneously, to drip spot and place digital industrial camera 18 times, leave standstill 30s, digital industrial camera 18 images acquired are also passed processor back, and the spot data are dripped in built-in image processing program collection, the coloured image that collects is decomposed into R/G/B triple channel image, behind the passage subtraction, calculate the area ratio of light blue haloing and center spot, judge whether to reach titration end-point.For the second time, repeat above step for the third time after, follow-up titration to the methylene blue addition in the sample receiver 9 is reduced to each 1ml, repeat titration and reach 15% or when above, be judged as titration end-point, calculate effective bentonite content value up to the area ratio of light blue haloing and center spot.
Embodiment 2: the effective bentonite content of clay old sand is measured
With being contained with 5g clay old sand, massfraction is that the sample receiver 9 of the mixed solution of 1% sodium pyrophosphate solution 20mL and distilled water 50mL is positioned on the mixing component 8, heating 10min mixes the back to solution and cools off, on the control program interface of processor 20 input for the first time, for the second time, the methylene blue amount of splashing into 80ml for the third time, 3ml and 2ml, the internal diameter of first transfer pipet 5 and second transfer pipet 10 is selected 1.6mm and 1.2mm respectively for use, the beginning titration, concrete steps are with embodiment 1.
Embodiment 3: the bentonite blue suction quantitative determination
With being contained with 0.2g bentonitic clay sample, massfraction is that 1% the sodium pyrophosphate solution 20mL and the sample receiver 9 of distilled water 50mL mixed solution are positioned on the mixing component 8, heating 10min mixes the back to solution and cools off, on the control program interface of processor 20 input for the first time, for the second time, the methylene blue amount of splashing into 30ml for the third time, 3ml and 2ml, the internal diameter of first transfer pipet 5 and second transfer pipet 10 is selected 0.8mm and 0.6mm respectively for use, the beginning titration, concrete steps finally obtain bentonite blue suction quantity with embodiment 1.
Embodiment 4: the bentonite blue suction quantitative determination
With being contained with 0.2g bentonitic clay sample, massfraction is that the sample receiver 9 of the mixed solution of 1% sodium pyrophosphate solution 20mL and distilled water 50mL is positioned on the mixing component 8, heating 10-15min mixes the back to solution and cools off, on the control program interface of processor 20 input for the first time, for the second time, the methylene blue amount of splashing into 30ml for the third time, 3ml and 2ml, the internal diameter of first transfer pipet 5 and second transfer pipet 10 is selected 1.6mm and 1.2mm respectively for use, the beginning titration, concrete steps finally obtain bentonite blue suction quantity with embodiment 1.
Claims (1)
1. bentonite blue suction quantity proving installation comprises stirring, moves liquid, titration, stepping rotation, image acquisition component and processor, it is characterized in that:
Described mixing component is made up of magnetic stirrer (8) and resistance wire, is fixed on the brace table (1), and resistance wire is positioned under magnetic stirrer (8) pallet;
The described liquid parts that move, form by first peristaltic pump (6), first transfer pipet (5) and reagent container (3), first peristaltic pump (6) is fixed in first vertical rod (7) of brace table, first transfer pipet (5) places the draw-in groove of first peristaltic pump, and the first transfer pipet lower end is fixing by first cross bar (4) that is fixed on first vertical rod;
Described titration parts, form by second peristaltic pump (11), second transfer pipet (10) and sample receiver (9), second peristaltic pump (11) is fixed in second vertical rod (12) of brace table, second transfer pipet (10) places the draw-in groove of second peristaltic pump, two ends are respectively by first cross bar (4) with to be fixed on second cross bar (13) of second vertical rod fixing, and second peristaltic pump has reverse system;
Described stepping rotatable parts are made up of turntable (19) and stepper motor (14), are fixed in second vertical rod (12) outside on the brace table, and stepper motor (14) is positioned at the turntable below, is connected by gear with turntable, and the stepping of control turntable (19) is rotated;
Described image acquisition component, form by digital industrial camera (17) and annular light source (18), be fixed in by fixed head (16) in the 3rd vertical rod (15) of brace table (1), digital industrial camera is fixed in the annular light source center, drip the spot image under the harvester on the middling speed quantitative filter paper sheet, and image is transmitted back processor;
Described processor (20) is connected with first peristaltic pump (6), magnetic stirrer (8), second peristaltic pump (11), stepper motor (14) and digital industrial camera (17) electric signal by data line (21); Processor (20) plug-in control module and image processing module.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007106A (en) * | 2014-06-24 | 2014-08-27 | 江苏力源金河铸造有限公司 | Method for determining effective bentonite in green sand for casting |
| CN106018674A (en) * | 2016-07-29 | 2016-10-12 | 无锡市三峰仪器设备有限公司 | Control device of methylene blue clay determination device |
| CN106093291A (en) * | 2016-07-29 | 2016-11-09 | 无锡市三峰仪器设备有限公司 | A kind of clay Absorbance ratio-derivative method determinator |
| CN106093029A (en) * | 2016-07-29 | 2016-11-09 | 无锡市三峰仪器设备有限公司 | A kind of methylene blue clay determinator |
| CN107677842A (en) * | 2017-10-19 | 2018-02-09 | 赤峰和正美化工有限公司 | A kind of smectite content automatic testing method |
| CN111175438A (en) * | 2020-01-18 | 2020-05-19 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Portable component titration apparatus |
| CN111239348A (en) * | 2020-03-31 | 2020-06-05 | 张玉久 | Molding sand clay content detection auxiliary assembly for casting |
| CN112305154A (en) * | 2020-10-16 | 2021-02-02 | 中石化石油工程技术服务有限公司 | Automatic analysis detector for bentonite blue absorption amount and detection method thereof |
| CN112305153A (en) * | 2020-10-16 | 2021-02-02 | 中石化石油工程技术服务有限公司 | Automatic analysis detector for bentonite content and detection method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007106A (en) * | 2014-06-24 | 2014-08-27 | 江苏力源金河铸造有限公司 | Method for determining effective bentonite in green sand for casting |
| CN106018674A (en) * | 2016-07-29 | 2016-10-12 | 无锡市三峰仪器设备有限公司 | Control device of methylene blue clay determination device |
| CN106093291A (en) * | 2016-07-29 | 2016-11-09 | 无锡市三峰仪器设备有限公司 | A kind of clay Absorbance ratio-derivative method determinator |
| CN106093029A (en) * | 2016-07-29 | 2016-11-09 | 无锡市三峰仪器设备有限公司 | A kind of methylene blue clay determinator |
| CN107677842A (en) * | 2017-10-19 | 2018-02-09 | 赤峰和正美化工有限公司 | A kind of smectite content automatic testing method |
| CN111175438A (en) * | 2020-01-18 | 2020-05-19 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Portable component titration apparatus |
| CN111239348A (en) * | 2020-03-31 | 2020-06-05 | 张玉久 | Molding sand clay content detection auxiliary assembly for casting |
| CN111239348B (en) * | 2020-03-31 | 2021-01-26 | 广东现代铸造有限公司 | Molding sand clay content detection auxiliary assembly for casting |
| CN112305154A (en) * | 2020-10-16 | 2021-02-02 | 中石化石油工程技术服务有限公司 | Automatic analysis detector for bentonite blue absorption amount and detection method thereof |
| CN112305153A (en) * | 2020-10-16 | 2021-02-02 | 中石化石油工程技术服务有限公司 | Automatic analysis detector for bentonite content and detection method thereof |
| CN112305153B (en) * | 2020-10-16 | 2022-09-23 | 中石化石油工程技术服务有限公司 | Automatic analysis detector for bentonite content and detection method thereof |
| CN112305154B (en) * | 2020-10-16 | 2022-09-23 | 中石化石油工程技术服务有限公司 | Automatic analysis detector for bentonite blue absorption amount and detection method thereof |
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