CN102353615A - Measuring apparatus and measuring method for dispersivity of piled granular substances - Google Patents
Measuring apparatus and measuring method for dispersivity of piled granular substances Download PDFInfo
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- CN102353615A CN102353615A CN201110157369XA CN201110157369A CN102353615A CN 102353615 A CN102353615 A CN 102353615A CN 201110157369X A CN201110157369X A CN 201110157369XA CN 201110157369 A CN201110157369 A CN 201110157369A CN 102353615 A CN102353615 A CN 102353615A
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Abstract
The invention relates to a measuring apparatus and a measuring method for dispersivity of piled granular substances. The measuring apparatus for dispersivity of piled granular substances comprises a rectangle measuring container which is provided with an inlet and an outlet; the outlet of the measuring container is connected with a suction pump; the measuring container is provided with a measuring cavity, and the cavity wall at two ends of the measuring cavity is full of fine screen meshes; a screen with a sponge filler is arranged at the part of the measuring cavity near the outlet; a cushion chamber is arranged between the measuring cavity and the outlet, and another cushion chamber is arranged between the measuring cavity and the inlet; two baffle plates are arranged at a place where the measuring cavity is opposite to the inlet; the bottom of the measuring container is transparent, a laser scanning imaging unit is provided at the lower part of the bottom of the measuring container, and a non-transparent shading cover is provided at the upper part of the measuring container; the suction pump and the laser scanning imaging unit are connected with a signal output connector through signal transmission lines. The invention enables measuring of dispersing power of the piled granular substances under the impact of laminar fluid to be realized, providing an evaluation method for flowing capacity of particles.
Description
One, technical field:
What the present invention relates to is that particle packing flow performance is carried out evaluating apparatus, and what be specifically related to is particle packing thing dispersity measurement mechanism and the measuring method under the percussive action of laminar flow state fluid.
Two, background technology:
The measuring equipment that existing solid is piled up the flowing property of material is mainly used in the flowability of powder and measures, and mainly is the value of measuring the powder angle of repose, estimates the fluid ability of powder again according to the size of this parameter value.At present, the measuring equipment that does not also have particle packing thing flowing property in fluid media (medium).The concrete concept of dispersity is the dispersibility of particle packing thing under the percussive action of other fluid media (medium)s, the fluid ability of the size evaluation particle packing thing of use dispersity numerical value.
The parameter of judging fluid flow state is Reynolds number;
;
is fluid density;
is hydrodynamic force viscosity;
is the speed in flow field, and
is the characteristic length in flow field.
; Fluid is a Turbulence Flow;
; Be transition state;
, fluid is a Laminar Flow.Can change the flow state of fluid through density, viscosity, the speed of adjustment fluid.
Three, summary of the invention:
The purpose of this invention is to provide particle packing thing dispersity measurement mechanism; It is used for solving the problem that prior art can't be measured in the fluid media (medium) flowing property the particle packing thing, and another object of the present invention provides the measuring method of particle packing thing dispersity measurement mechanism.
The technical solution adopted for the present invention to solve the technical problems is: this particle dispersity measurement mechanism has a rectangle test container that has the gateway; The outlet of test container is connected with suction pump; Test container has a test cavity; Be covered with tiny mesh on the cavity wall at test cavity two ends, the test cavity is provided with the separated of sponge stuff near the position that exports and sieves, and is cushion chamber between test cavity and the outlet; Between test cavity and the inlet cushion chamber is arranged also, the test cavity is provided with two baffle plates with the relative position of inlet; The test container bottom surface is transparent, and bottom, test container bottom surface is provided with laser scanning imaging device, and test container top has opaque shading lid, and suction pump, laser scanning imaging device are connected on the signal output connector through signal transmssion line.
Test container length is 1 ~ 5 meter in the such scheme, 0.2 ~ 0.4 meter of cavity depth of test, 0.6 ~ 0.9 meter of width; 0.1 ~ 0.2 meter of width between 0.2 ~ 0.4 meter of the height of baffle plate, 0.2 ~ 0.4 meter of the length, two baffle plates.
The test container inlet is connected with liquid reserve tank in the such scheme, test container porch install adjustment valve, and the suction delivery side of pump connects another liquid reserve tank.
Signal output connector connects computer in the such scheme.
The measuring method of above-mentioned particle dispersity measurement mechanism:
One, temporary close test container inlet with piling water in the test container, is deposited in particle between two baffle plates, and the regular rectangular shape of regular one-tenth surfacing, measures the deposit height H;
Two, opening the test container inlet, start and adjusting suction pump pumping velocity, is 1.0 ~ 1.2g/cm to density
3, kinetic viscosity is 50 ~ 70
Fluid aspirate, make the flowing velocity of fluid reach 0.5 ~ 0.8m/s, this moment fluid flow state be laminar flow state, cover the shading lid, the particle packing thing is carried out 5-10 minute impact; Because the percussive action of fluid, a part of particle is gone out the baffle plate place by fluid, and this part particle is deposited on the test container bottom surface, constitutes the graphics shape with certain area, emits the test container inner fluid;
Three, use laser scanning imaging device; The irregularly shaped scanning imagery that the disperse of test container endoparticle thing is formed is in computer; The area S of count particles thing disperse shape and the particle volume V that goes out from baffle plate are with remaining particle packing thing surface evening in the baffle plate, measuring height value h; * (the S/V)/H of particle dispersion degree=(H-h), computer shows measurement result.
Beneficial effect:
1, the present invention can measure the particle packing thing dispersibility under the effect of laminar flow fluid impact, for the particle fluid ability provides a kind of evaluation method.
2, the present invention can form the equally distributed flow field of speed on the fluid cross-section in the test cavity; And the scanning particle deposit through the plane of fluid impact postforming dispersion pattern, for particle packing thing dynamic flow ability assessment provides new technical method.
Four, description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the cut-open view of Fig. 1;
Fig. 3 is the user mode synoptic diagram.
1 test container, 2 suction pumps, 3 test cavitys 4 are at a distance from sieve 5 cushion chambers 6 baffle plates 7 lids 8 laser scanning imaging devices 9 liquid reserve tanks 10 liquid reserve tanks.
Five, embodiment:
Below in conjunction with accompanying drawing the present invention is done further explanation:
In conjunction with Fig. 1, shown in Figure 2; This particle dispersity measurement mechanism has a test container 1, and test container 1 is the rectangular tank that has the gateway, and the outlet of rectangular tank is connected with suction pump 2; Rectangular tank has a test cavity 3; Be covered with tiny mesh on the cavity wall at test cavity 3 two ends, test cavity 3 is provided with the separated of sponge stuff near the position that exports and sieves 4, and this is at a distance from sieve 4 and test formation cushion chamber 5 between cavity 3 walls; Between test cavity 3 and the outlet is cushion chamber 5, between test cavity 3 and the inlet cushion chamber 5 is arranged also; Because the inhomogeneous differentiation at two ends was separated out when test cavity 3 two ends respectively had a cushion chamber can fluid be got into test container 1; Make in the test cavity 3 and form stable uniform flow field; And 3 outlets of test cavity are owing to there are two cushion chambers; Can suction pump 2 suction strength be carried out slowly-releasing, guarantee to test cavity 3 and form a stabilized uniform pressure drop flow field; Test cavity 3 is provided with two parallel baffles 6 with the relative position of inlet; Be used to pile up the particle of testing usefulness between two baffle plates 6, owing to it communicates with inlet, when suction pump 2 draw fluid; Fluid impacts the particle of 6 on baffle plate, and particle is disperseed in test cavity 3; Test container 1 bottom surface is transparent, and bottom, test container 1 bottom surface is provided with laser scanning imaging device 8, but thus the scanning particle deposit through the plane of fluid impact postforming dispersion pattern; Test container 1 top has opaque shading lid 7, and lid 7 can play sealing function, and suction pump 2, laser scanning imaging device 8 are connected to the signals collecting transmission card through signal transmssion line, and data acquisition card is installed on computers.
Be covered with tiny mesh on the cavity wall at test cavity 3 two ends, can balanced fluid flow section on velocity flow profile; The separated sieve of test cavity 3 can stop particle to run off.
1 ~ 5 meter of test container 1 length of the present invention, 0.2 ~ 0.4 meter of test cavity 3 height, 0.6 ~ 0.9 meter of width, the baffle plate that holds particle is 6 high 0.2 ~ 0.4 meter, 0.1 ~ 0.2 meter of width, 0.2 ~ 0.4 meter of length.
Dispersity is the dispersibility of particle packing thing under the percussive action of other fluid media (medium)s, estimates the fluid ability of particle packing thing through the size of using dispersity numerical value.
When the present invention row particle dispersity is measured, consult shown in Figure 3ly, need the liquid reserve tank 9 of splendid attire fluid be connected with the inlet of test container 1; The install adjustment valve in the porch connects another liquid reserve tank 10 to the outlet of suction pump 2, aspirates through the fluid in 2 pairs of casings of suction pump; Particle to baffle plate 6 places impacts, and obtains the disperse shape of particle, carries out analyzing and processing; Concrete measuring method is following
At first, the required fluid of preparation test makes fluid density at 1.0 ~ 1.2g/cm
3Between, the kinetic viscosity of fluid is 30 ~ 70
Between (milli handkerchief second), with fluid storage in liquid reserve tank 9; The temporary close fluid intake is piled water in test container 1, the particle of certain volume is placed on 6 on two baffle plates in the test container 1, and is smooth the particle surface treatment, measures the deposit height H; Opening test container 1 inlet, start and adjusting suction pump 2 pumping velocities, is 1.0 ~ 1.2g/cm to density
3, kinetic viscosity is 50 ~ 70
Fluid aspirate; Make the flowing velocity of fluid reach 0.5 ~ 0.8m/s, this moment, the flow state of fluid was a laminar flow state, covered shading lid 7; The particle packing thing carried out 5-10 minute impact; Through behind 5-10 minute the fluid impact, the disperse in test cavity 3 of a part of particle becomes irregularly shaped, emits the fluid in the test container 1; Use laser scanning imaging device 8; The irregular shape scanning imagery that test cavity 3 endoparticle thing disperses are formed is in computer; The volume V of the area S of count particles thing disperse shape and the particle that goes out from baffle plate 6 disperses is with 6 remaining particle packing thing surface evenings of baffle plate, measuring height value h; Thereby obtain * (the S/V)/H of particle dispersion degree=(H-h).
Particle diameter of the present invention is between 2mm-5cm.
Claims (5)
1. particle dispersity measurement mechanism; It is characterized in that: this particle dispersity measurement mechanism has a rectangle test container (1) that has the gateway; The outlet of test container (1) is connected with suction pump (2); Test container (1) has a test cavity (3); Be covered with tiny mesh on the cavity wall at test cavity (3) two ends, test cavity (3) near the position of outlet be provided with the sponge stuff at a distance from sieve (4), test cavity (3) with export between be cushion chamber (5); Between test cavity (3) and the inlet cushion chamber (5) is arranged also, test cavity (3) is provided with two baffle plates (6) with the relative position of inlet; Test container (1) bottom surface is transparent; Test container (1) bottom, bottom surface is provided with laser scanning imaging device (8); Test container (1) top has opaque shading lid (7), and suction pump (2), laser scanning imaging device (8) are connected on the signal output connector through signal transmssion line.
2. particle dispersity measurement mechanism according to claim 1 is characterized in that: 1 ~ 5 meter of described test container (1) length, 0.2 ~ 0.4 meter of test cavity (3) degree of depth, 0.6 ~ 0.9 meter of width; 0.2 ~ 0.4 meter of the height of baffle plate (6), 0.2 ~ 0.4 meter of length, 0.1 ~ 0.2 meter of the width between two baffle plates (6).
3. particle dispersity measurement mechanism according to claim 2; It is characterized in that: described test container (1) inlet is connected with liquid reserve tank (9); Test container (1) porch install adjustment valve, the outlet of suction pump (2) connects another liquid reserve tank (10).
4. particle dispersity measurement mechanism according to claim 3 is characterized in that: described signal output connector connects computer.
5. the measuring method of claim 1 or 2 or 3 or 4 described particle dispersity measurement mechanisms is characterized in that: its measuring method does,
One, temporary close test container (1) inlet with piling water in the test container (1), is deposited in particle between two baffle plates (6), and the regular rectangular shape of regular one-tenth surfacing, measures the deposit height H;
Two, opening test container (1) inlet, start and adjusting suction pump (2) pumping velocity, is 1.0 ~ 1.2g/cm to density
3, kinetic viscosity is 50 ~ 70
Fluid aspirate, make the flowing velocity of fluid reach 0.5 ~ 0.8m/s, this moment fluid flow state be laminar flow state, cover shading lid (7), the particle packing thing is carried out 5-10 minute impact; Because the percussive action of fluid, a part of particle is gone out baffle plate (6) by fluid and is located, and this part particle is deposited on test container (1) bottom surface, constitutes the graphics shape with certain area, emits test container (1) inner fluid;
Three, use laser scanning imaging device (8); The irregularly shaped scanning imagery that the disperse of test container (1) endoparticle thing is formed is in computer; The area S of count particles thing disperse shape and the particle volume V that goes out from baffle plate (6) are with remaining particle packing thing surface evening in the baffle plate (6), measuring height value h; * (the S/V)/H of particle dispersion degree=(H-h), computer shows measurement result.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110157369 CN102353615B (en) | 2011-06-13 | 2011-06-13 | Measuring apparatus and measuring method for dispersivity of piled granular substances |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110157369 CN102353615B (en) | 2011-06-13 | 2011-06-13 | Measuring apparatus and measuring method for dispersivity of piled granular substances |
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| CN102353615A true CN102353615A (en) | 2012-02-15 |
| CN102353615B CN102353615B (en) | 2013-04-17 |
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| CN 201110157369 Expired - Fee Related CN102353615B (en) | 2011-06-13 | 2011-06-13 | Measuring apparatus and measuring method for dispersivity of piled granular substances |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2998596B2 (en) * | 1994-08-01 | 2000-01-11 | 東レ株式会社 | Fluid flow process analysis device, analysis method, injection molding process analysis device, analysis method, injection molded product, and method for manufacturing injection molded product |
| JP3358870B2 (en) * | 1994-06-13 | 2002-12-24 | 三井武田ケミカル株式会社 | Method for evaluating fluidity and demoldability of foam |
| CN1424569A (en) * | 2001-12-12 | 2003-06-18 | 株式会社堀场制作所 | Testing device and method for dry particle size distribution |
| CN101042310A (en) * | 2006-03-21 | 2007-09-26 | 中国科学院过程工程研究所 | Method for measuring granule fluid two-phase stream system heterogeneous texture parameter distribution |
| CN101526515A (en) * | 2009-04-02 | 2009-09-09 | 河海大学 | Method and device for measuring disseminated parameter of solute migration |
-
2011
- 2011-06-13 CN CN 201110157369 patent/CN102353615B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3358870B2 (en) * | 1994-06-13 | 2002-12-24 | 三井武田ケミカル株式会社 | Method for evaluating fluidity and demoldability of foam |
| JP2998596B2 (en) * | 1994-08-01 | 2000-01-11 | 東レ株式会社 | Fluid flow process analysis device, analysis method, injection molding process analysis device, analysis method, injection molded product, and method for manufacturing injection molded product |
| CN1424569A (en) * | 2001-12-12 | 2003-06-18 | 株式会社堀场制作所 | Testing device and method for dry particle size distribution |
| CN101042310A (en) * | 2006-03-21 | 2007-09-26 | 中国科学院过程工程研究所 | Method for measuring granule fluid two-phase stream system heterogeneous texture parameter distribution |
| CN101526515A (en) * | 2009-04-02 | 2009-09-09 | 河海大学 | Method and device for measuring disseminated parameter of solute migration |
Non-Patent Citations (5)
| Title |
|---|
| JUN REN 等: "Characteristics of dispersion behavior of fine particles in different liquid media", 《POWDER TECHNOLOGY》 * |
| XIAOGANG YANG,等: "Modelling of heavy and buoyant particle dispersion in a two-dimensional turbulent mixing layer", 《POWDER TECHNOLOGY》 * |
| YOSHIYUKI ENDO,YASUO KOUSAKA: "Dispersion mechanism of coagulated particles in liquid flow", 《COLLOIDS AND SURFACES》 * |
| 张会强，等: "两相混合层中颗粒运动的数值模拟", 《工程热物理学报》 * |
| 郑西来，等: "地下水含水介质的弥散度测定", 《西安工程学院学报》 * |
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