CN107917857A - Radial capillary pipe rheometer - Google Patents
Radial capillary pipe rheometer Download PDFInfo
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- CN107917857A CN107917857A CN201710990143.5A CN201710990143A CN107917857A CN 107917857 A CN107917857 A CN 107917857A CN 201710990143 A CN201710990143 A CN 201710990143A CN 107917857 A CN107917857 A CN 107917857A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Measuring Fluid Pressure (AREA)
Abstract
The present invention relates to a kind of radial capillary pipe rheometer, with the big barrel for holding polymeric fluid to be tested, the big barrel bottom centre position is connected with small barrel, small barrel bottom both sides radially installed has the first capillary and the second capillary, and small barrel bottom surface is provided with the pressure sensor of measure Fluid pressure.The present invention uses radial arrangement capillary, easy to test the inlet pressure in capillary, also allows for the mobility status in observation capillary, improves testing efficiency, save manufacture cost.
Description
Technical field
The present invention relates to rheology technical field of measurement and test, especially a kind of radial capillary pipe rheometer.
Background technology
In traditional capillary rheometer structure, capillary is typically mounted at below barrel, due to capillary position
Narrow space, therefore the pressure sensor used in pressure measurement can be only installed at barrel bottom sides, so when macromolecule to be determined
When material flows into capillary out of barrel, since the stretching of macromolecule material tends to, a part of pressure energy changes into elastic energy, makes
Entrance pressure losses are larger at capillary, the Fluid pressure that the pressure sensor of barrel end measures is higher than the pressure in capillary
Power, it is therefore desirable to make inlet pressure correction, as Bagley corrects or use dual-barrel capillary (normal capillary pipe and distance of zero mark capillary
Pipe) pressure correction is carried out, while capillary is installed on immediately below barrel, is also not easy to flowing shape of the observation material in capillary
Condition.
The content of the invention
The technical problem to be solved in the present invention is：In order to overcome deficiency in the prior art, the present invention provides one kind and is easy to
Capillary-entrance-pressure test, the radial capillary pipe rheometer for improving testing efficiency.
The technical solution adopted by the present invention to solve the technical problems is：A kind of radial capillary pipe rheometer, has and holds
The big barrel of polymeric fluid to be tested, the big barrel bottom centre position are connected with small barrel, the small barrel bottom
Both sides radially installed has the first capillary and the second capillary, and small barrel bottom surface is provided with the pressure sensing of measure Fluid pressure
Device.
Preferably to reduce the pressure loss, the big barrel have with small barrel junction realize fluid from big barrel to
45 ° of chamferings that small barrel flows slowly into.
Further, the diameter of first capillary and the second capillary can be equal, can not also be equal, can root
Made choice according to test fluid actual requirement.
Preferably, the diameter of first capillary and the second capillary is between 0.5~1.5mm.
The beneficial effects of the invention are as follows：The present invention uses radial arrangement capillary, easy to test the entrance pressure in capillary
Power, also allows for the mobility status in observation capillary, improves testing efficiency, save manufacture cost.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the structure diagram of the present invention.
In figure：1. big small 3. first 4. second capillary of capillary, 5. pressure sensor of barrel, 6. chamfering of barrel 2.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows composition related to the present invention.
A kind of radial capillary pipe rheometer as shown in Figure 1, has the big barrel 1 for holding polymeric fluid to be tested, institute
1 bottom centre position of big barrel stated is connected with small barrel 2, and small 2 diameter of barrel is much smaller than the diameter of big barrel 1.
The 2 bottom both sides radially installed of small barrel has the first capillary 3 and the second capillary 4, first capillary
The diameter of 3 and second capillary 4 of pipe can be equal, can not also be equal, can select as needed, it is preferable that the first capillary 3
And second capillary 4 diameter between 0.5~1.5mm, such as 0.5mm/1.0mm/1.5mm.First capillary 3 and the second capillary
Pipe 4 can be used simultaneously, and also only can use a capillary, when using a capillary, can block other one with plug,
Since the first capillary 3 and the second capillary 4 with small barrel 2 using radially mounting means is connected, space is larger, therefore facilitates the
The replacement dismounting of one capillary 3 and the second capillary 4.
2 bottom surface of small barrel is provided with the pressure sensor 5 of measure Fluid pressure, is flowed with detecting material from small barrel 2
Enter pressure when the first capillary 3 and the second capillary 4.
The big barrel 1 has with small 2 junction of barrel realizes what fluid was flowed slowly into from big barrel 1 to small barrel 2
45 ° of chamferings 6, material can flow into small barrel 2 by 6 slow transition of chamfering by big barrel 1, reduce the pressure loss (part
Pressure energy changes into the elasticity energy of macromolecule material).
Above-mentioned small barrel 2 plays a transitional function, with realize big 1 and first capillary 3 of barrel and the second capillary 4 it
Between connection because big 1 diameter of barrel is more than ten times even tens times of 4 diameter of the first capillary 3 or the second capillary, can produce
Raw larger entrance pressure losses, and since small 2 diameter of barrel is smaller, when material enters first mao by small 2 transition of barrel
When tubule 3 or the second capillary 4, entrance pressure losses are smaller, can approximation ignore the pressure loss, so avoid inlet pressure
Correction.
Since the rheometer lower space is larger, can be used on the first capillary 3 and the second capillary 4 of radially installed
Visualization device, such as uses transparent glass cover-plate, and is taken pictures or imaged using light beam, is able to observe that material in the first capillary
Mobility status in 3 and second capillary 4 of pipe；Also due to the first capillary 3 and the second capillary 4 are radially installeds, thus subtract
Influence of the gravity for Flow of Goods and Materials in the first capillary 3 and the second capillary 4 is lacked.
As needed, the material in big barrel 1, small barrel 2, the first capillary 3 and the second capillary 4 is all subject to nitrogen to protect
Shield, prevents material high-temperature oxydation in atmosphere.Other temperature control equipments are consistent with conventional capillary rheometer.
The present invention is improved on the basis of conventional capillary rheometer, and traditional capillary rheometer and rotating flow
The test philosophy (such as shear rate, shear stress formula) for becoming instrument stands good in the present invention.The computer peace coupled with rheometer
A test software is filled, experimental data and curve can be handled by computer software record.
It is complete by above-mentioned description, relevant staff using the above-mentioned desirable embodiment according to the present invention as enlightenment
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.
Claims (4)
1. a kind of radial capillary pipe rheometer, has the big barrel (1) for holding polymeric fluid to be tested, it is characterized in that：It is described
Big barrel (1) bottom centre position be connected with small barrel (2), small barrel (2) the bottom both sides radially installed has first mao
Tubule (3) and the second capillary (4), small barrel (2) bottom surface are provided with the pressure sensor (5) of measure Fluid pressure.
2. radial capillary pipe rheometer as claimed in claim 1, it is characterized in that：The big barrel (1) connects with small barrel (2)
The place of connecing, which has, realizes 45 ° of chamferings (6) that fluid is flowed slowly into from big barrel (1) to small barrel (2).
3. radial capillary pipe rheometer as claimed in claim 1, it is characterized in that：First capillary (3) and second mao
The diameter of tubule (4) can be equal, can not also be equal.
4. radial capillary pipe rheometer as claimed in claim 3, it is characterized in that：First capillary (3) and second mao
The diameter of tubule (4) is between 0.5~1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710990143.5A CN107917857B (en) | 2017-10-23 | 2017-10-23 | Radial capillary rheometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710990143.5A CN107917857B (en) | 2017-10-23 | 2017-10-23 | Radial capillary rheometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107917857A true CN107917857A (en) | 2018-04-17 |
| CN107917857B CN107917857B (en) | 2020-10-16 |
Family
ID=61895761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710990143.5A Active CN107917857B (en) | 2017-10-23 | 2017-10-23 | Radial capillary rheometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107917857B (en) |
Citations (14)
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|---|---|---|---|---|
| CN87216713U (en) * | 1987-12-20 | 1988-10-12 | 冮殿坚 | Blood flow detector with infrared photoelectric sensor |
| CN2049358U (en) * | 1989-04-03 | 1989-12-13 | 中国石油化工总公司大连石油化工公司 | Multijig rotational viscometer |
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|---|---|---|---|---|
| CN87216713U (en) * | 1987-12-20 | 1988-10-12 | 冮殿坚 | Blood flow detector with infrared photoelectric sensor |
| CN2049358U (en) * | 1989-04-03 | 1989-12-13 | 中国石油化工总公司大连石油化工公司 | Multijig rotational viscometer |
| CN1390302A (en) * | 1999-11-12 | 2003-01-08 | 瑞罗吉公司 | Dual riser/single capillary viscometer |
| US20030127329A1 (en) * | 2001-06-04 | 2003-07-10 | Devoe Donald Lad | Field effect flow control apparatus for microfluidic networks |
| US20050056084A1 (en) * | 2003-09-15 | 2005-03-17 | Taylor John A. | Curtain coater rheology management |
| CN1773245A (en) * | 2005-11-12 | 2006-05-17 | 大连理工大学 | On-line type polymer double-capillary extrusion rheometer |
| CN102150042A (en) * | 2008-08-11 | 2011-08-10 | 藤森工业株式会社 | Blood-platelet test method and blood-platelet test device |
| US20110120207A1 (en) * | 2009-11-24 | 2011-05-26 | Basf Se | Method and device for characterizing magnetorheological fluids |
| CN102323186A (en) * | 2011-05-25 | 2012-01-18 | 湖南工业大学 | Method for measuring fluid shear stress in capillary and device |
| CN102590032A (en) * | 2012-02-28 | 2012-07-18 | 西南科技大学 | Viscous dissipation measuring device and measuring method |
| CN103009601A (en) * | 2012-12-17 | 2013-04-03 | 常州大学 | Extrusion molding die capable of improving extrusion yield and surface quality |
| CN104865161A (en) * | 2014-06-10 | 2015-08-26 | 中国石油天然气股份有限公司 | Method for measuring liquid viscosity by utilization of capillary and device used for method |
| CN106769676A (en) * | 2017-01-12 | 2017-05-31 | 中国石油大学(北京) | It is a kind of for improving and to measure the device and method of liquid fluidity |
| CN107144496A (en) * | 2017-05-21 | 2017-09-08 | 郑州大学 | Spray castable service behaviour test device and method of testing |
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| ZHENGHONG TAO 等: ""Observation of melt fracture of polypropylene resins in capillary flow"", 《POLYMER》 * |
| 王贞涛 等: ""双毛细管静电雾化电场特性研究"", 《农业机械学报》 * |
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| Publication number | Publication date |
|---|---|
| CN107917857B (en) | 2020-10-16 |
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