CN103076259A - Device and method for measuring bulk density-pressure relation of powder material - Google Patents
Device and method for measuring bulk density-pressure relation of powder material Download PDFInfo
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- CN103076259A CN103076259A CN2013100005655A CN201310000565A CN103076259A CN 103076259 A CN103076259 A CN 103076259A CN 2013100005655 A CN2013100005655 A CN 2013100005655A CN 201310000565 A CN201310000565 A CN 201310000565A CN 103076259 A CN103076259 A CN 103076259A
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- bulk density
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- 239000000843 powder Substances 0.000 title claims abstract description 57
- 239000000463 material Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to a device and a method for measuring the bulk density-pressure relation of a powder material. The device comprises a charging barrel, a storing cavity, a threaded sleeve, a pressing bar, a lock nut, mounting holes of a first pressure sensor and a second pressure sensor, as well as a fastening device, wherein the pressing bar is used for changing the volume of the storing cavity and further changing the bulk density of the powder material, extruding the material, and changing the material pressure. The measuring method includes steps that the powder material is placed into the storing cavity to an original position length; the threaded sleeve pushes the pressing bar to move axially towards the inside of the charging barrel to a working position length of the storing cavity; the bulk density of the powder material caused by volume compression of the storing cavity is calculated according to the original position length of the storing cavity, the bulk density of the powder material under a normal pressure, and the working position length; and the corresponding relation of the bulk density and the pressure of the compressed powder material is obtained. According to the device and the method, high pressure can be obtained without utilization of a hydraulic system, and easiness and accuracy are achieved.
Description
Technical field
The present invention relates to powder body material bulk density-pressure test device and method, particularly the device design field relevant with the powder body material bulk density.
Background technology
The powder bulk density refers to the average density of the discrete particles accumulation body that comprises the inside and outside hole of particle and intergranular space.The bulk density characteristic of powder body material changes along with the variation of pressure.The powder body material of certain mass bulk density and pressure in specific confined space are one to one.At the powder manufacture field, design or selection that the affected by high that causes owing to the powder volume compression power-equipment.For example in the sealing C of counter rotation twin screw extruder shape chamber, the pressure size of powder body material directly affects the important parameters such as the power of equipment and moment of torsion.Therefore the research of powder bulk density-pressure dependence is very necessary.
The method of current mensuration powder bulk density is: the quality that the powder granule material is freely filled under rated condition and the ratio of unit volume.But current instrument is mainly for the measurement of the powder bulk density under angle of repose, flowability and the atmospheric pressure state of powder body material.For the measurement of powder body material bulk density size under the different pressures state, also there is not at present corresponding method of testing.
Summary of the invention
The object of the invention is to, by a kind of device of measuring powder body material bulk density-pressure characteristic is provided, to realize the research of powder body material bulk density characteristic under different pressures.
A kind of device of measuring powder body material bulk density-pressure is characterized in that: use and carry out the measurement of bulk density-pressure such as lower device, the formation of its device such as Fig. 1:
A kind of measurement mechanism of powder body material bulk density-pressure dependence, it is characterized in that: compressing rod 4 is installed in the screw shell 3 and both axially parallels are installed, that end relative with the compressing rod top is called the bottom, compressing rod 4 bottoms are concordant with screw shell 3 bottom surfaces, and compressing rod 4 bottoms are provided with the second pressure transducer mounting hole 7; Compressing rod 4 and screw shell 3 are in the nut lock of compressing rod top, and screw shell part inwall and part barrel outer wall are threaded connection, and stationary installation fixes to clamp barrel; Be provided with the first pressure transducer mounting hole 6 in the barrel position relative with the compressing rod bottom;
The first pressure transducer mounting hole on barrel and compressing rod and the second pressure transducer mounting hole be the setting pressure sensor respectively; Consist of storage cavity by the space that surrounds between material tube inner wall and the compressing rod bottom.
Leave certain interval between compressing rod and the material tube inner wall, compressing rod and material tube inner wall do not interfere in this gap assurance transmission process.The gap length scope is 0.05-0.5mm, determines according to powder body material is different.
The course of work of this device: with compressing rod and screw shell assembles and with hexagonal nut locking, setting pressure sensor.Powder body material is added in the storage cavity 2 to original position length L 0, load onto screw shell and rotate a fixing turn and seal powder, device is fixed on the fastener 8.Along with the rotation of screw shell 3, compressing rod 4 compressed materials, the pressure of powder imports the experimental data acquisition system into by the sensor that is installed on the first pressure transducer mounting hole 6 and the second pressure transducer mounting hole 7.Converse the density of powder according to the working position length L of the advance distance of compressing rod and storage cavity, meanwhile read the pressure size.
Take the waste old rubber powder as example, can obtain rubber powder bulk density-pressure dependence curve according to above measuring method.Extrude in the process of desulfurization recovery waste old rubber powder at incongruous double screw, the rubber powder is isolated in the C shape independent of each other chamber.The variation of each C shape chamber volume will affect the variation of powder body material bulk density, and then affect the indoor pressure variation of each C shape.According to powder body material bulk density-pressure dependence curve, can calculate the axially indoor pressure distribution of each C shape of twin-screw, and then can calculate power consumption and moment of torsion on the whole screw rod.
By screw shell rotary actuation compressing rod compression powder, draw powder bulk density-pressure dependence according to the registration of pressure transducer and the working position length of storage cavity.
Described patent content can be used for the research of various powder body materials or subparticle bulk density-pressure characteristic.
Description of drawings
The schematic diagram of Fig. 1 powder body material bulk density-device for pressure measurement.
Wherein, 1 barrel, 2 storage cavitys, 3 screw shells, 4 compressing rods, 5 set nuts, 6 first pressure transducer mounting holes, 7 second pressure transducer mounting holes, 8 fasteners.
The initial position figure of Fig. 2 measurement mechanism storage cavity, L0 are the original position length of storage cavity
The working position figure of Fig. 3 measurement mechanism storage cavity, L are the working position length of storage cavity
Fig. 4 powder body material bulk density-pressure curve
Embodiment
The parts of this device consist of:
Compressing rod 4 assembles with screw shell 3 and is fixing with set nut 5, and the first pressure transducer mounting hole 6 on barrel 1 and compressing rod 4 and the second pressure transducer mounting hole 7 install pressure transducer respectively; Powder body material is packed in the barrel 1 to the original position length L 0 of storage cavity, screw shell 3 is threaded with barrel 1, and rotate the end face that the specific number of turns makes compressing rod 4 and just contact with powder, at this moment, the density of powder is normal pressure P
0Under bulk density ρ
0Continue the rotation screw shell to a certain position, screw shell tip-to-face distance barrel bottom surface distance is the working position length L of storage cavity, and pressure sensor reading is P up and down
1, P
2, then the density of powder and pressure are respectively this moment:
These computing method can be applicable to the measurement of all kinds powder body material bulk density-pressure dependence.
Take 20 order waste rubber powders as example, the corresponding relation of bulk density and pressure is as shown in table 1 at normal temperatures.
The bulk density of table 1 waste rubber powder and the relation of pressure
| Sequence number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Pressure/MPa | 0.1 | 0.2 | 0.77 | 0.904 | 1.098 | 1.737 | 5.138 | 14.041 |
| Density/g/cm 3 | 0.392 | 0.915 | 1.097 | 1.12 | 1.143 | 1.168 | 1.183 | 1.193 |
The pressure-dependent relation of its bulk density such as Fig. 4.
In the above embodiment and described in Fig. 1, only in order to an example of the present invention to be described, and and unrestricted technical scheme described in the invention; For example: can change this measurement mechanism into vertical placement.Although the present invention is had been described in detail with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from technical scheme and the improvement thereof of the protection domain of the present invention's proposition, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. the measurement mechanism of a powder body material bulk density-pressure dependence, it is characterized in that: compressing rod is installed in the screw shell and both axially parallels are installed, that end relative with the compressing rod top is called the bottom, the compressing rod bottom is concordant with the screw shell bottom surface, and the compressing rod bottom is provided with the second pressure transducer mounting hole; Compressing rod and screw shell are in the nut lock of compressing rod top, and screw shell part inwall and part barrel outer wall are threaded connection, and stationary installation fixes to clamp barrel; Be provided with the first pressure transducer mounting hole in the barrel position relative with the compressing rod bottom;
The first pressure transducer mounting hole on barrel and compressing rod and the second pressure transducer mounting hole be the setting pressure sensor respectively; Consist of storage cavity by the space that surrounds between material tube inner wall and the compressing rod bottom.
2. use the measuring method that device as claimed in claim 1 carries out powder body material bulk density-pressure dependence, it is characterized in that: powder body material is put into storage cavity original position length, the rotation screw shell promotes compressing rod and moves axially working position length to storage cavity in the barrel, goes out the bulk density of powder body material after because of the storage cavity volume compression according to the original position length of storage cavity, powder body material bulk density under the normal pressure and working position length computation; By the reading of the pressure transducer on barrel and the compressing rod, obtain powder body material bulk density-pressure corresponding relation.
3. described method according to claim 2, it is characterized in that: change the working position length in the storage cavity, calculate corresponding powder body material bulk density value, corresponding variation can occur in detected force value, draws thus the relation curve of compressed powder body material bulk density and pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310000565.5A CN103076259B (en) | 2013-01-02 | 2013-01-02 | Device and method for measuring bulk density-pressure relation of powder material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310000565.5A CN103076259B (en) | 2013-01-02 | 2013-01-02 | Device and method for measuring bulk density-pressure relation of powder material |
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| CN103076259A true CN103076259A (en) | 2013-05-01 |
| CN103076259B CN103076259B (en) | 2014-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903523A (en) * | 2021-01-27 | 2021-06-04 | 武汉裕大华纺织有限公司 | Method for adjusting compaction density of dust compactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007263860A (en) * | 2006-03-29 | 2007-10-11 | Dowa Holdings Co Ltd | Tap density measuring method and device of powder |
| CN101140214A (en) * | 2006-09-04 | 2008-03-12 | 深圳市比克电池有限公司 | Method for testing battery positive pole powder material compacted density |
| US20110079087A1 (en) * | 2009-10-02 | 2011-04-07 | Hitec Luxembourg S.A. | Method and apparatus for determining void volume for a particulate material |
| CN102818745A (en) * | 2012-08-03 | 2012-12-12 | 中建商品混凝土天津有限公司 | Device and method for testing powder bulk density |
-
2013
- 2013-01-02 CN CN201310000565.5A patent/CN103076259B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007263860A (en) * | 2006-03-29 | 2007-10-11 | Dowa Holdings Co Ltd | Tap density measuring method and device of powder |
| CN101140214A (en) * | 2006-09-04 | 2008-03-12 | 深圳市比克电池有限公司 | Method for testing battery positive pole powder material compacted density |
| US20110079087A1 (en) * | 2009-10-02 | 2011-04-07 | Hitec Luxembourg S.A. | Method and apparatus for determining void volume for a particulate material |
| CN102818745A (en) * | 2012-08-03 | 2012-12-12 | 中建商品混凝土天津有限公司 | Device and method for testing powder bulk density |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903523A (en) * | 2021-01-27 | 2021-06-04 | 武汉裕大华纺织有限公司 | Method for adjusting compaction density of dust compactor |
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| CN103076259B (en) | 2014-12-31 |
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