CN108872018A - At the uniform velocity capillary viscometer and its Viscosity Measurement Methods - Google Patents
At the uniform velocity capillary viscometer and its Viscosity Measurement Methods Download PDFInfo
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- CN108872018A CN108872018A CN201811005497.0A CN201811005497A CN108872018A CN 108872018 A CN108872018 A CN 108872018A CN 201811005497 A CN201811005497 A CN 201811005497A CN 108872018 A CN108872018 A CN 108872018A
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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
- G01N11/08—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 by measuring pressure required to produce a known flow
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Abstract
At the uniform velocity capillary viscometer and its Viscosity Measurement Methods belong to viscosity measurement technical field.The fluid source is connected to by conduit with capillary, and regulating valve and micro-flowmeter are equipped on the conduit, and the regulating valve is arranged between fluid source and micro-flowmeter, and the capillary both ends are simultaneously connected to micro-differential pressure gauge.At the uniform velocity capillary viscometer Viscosity Measurement Methods, include the following steps：One, after connecting device, regulating valve is opened, control fluid flow is fixed value；Two, the numerical value of first group of micro-flowmeter and micro-differential pressure gauge is recorded；Three, regulating valve is adjusted, changes fluid flow, and record the numerical value of second group of micro-flowmeter and micro-differential pressure gauge；Four, above-mentioned steps three are repeated as many times, the numerical value of multiple groups micro-flowmeter and micro-differential pressure gauge is recorded；Five, the numerical value of multiple groups micro-flowmeter and the records of values of micro-differential pressure gauge is brought into formulaSeek fluid viscosity average value.The configuration of the present invention is simple, low in cost and measuring accuracy are high.
Description
Technical field
The invention belongs to viscosity measurement technical fields, more particularly to a kind of at the uniform velocity capillary viscometer.
Background technique
Viscosity is a kind of physicochemical properties of substance, and the measurement of viscosity is for the technique mistake in prediction process of producing product
The operability of journey, transporting and product when in use has important guiding value.The principle of experimental determination viscosity is usual
It is that the expression formula in relation to viscosity is exported by Stokes formula or Poiseuille's formula, finds out viscosity.All fluids include liquid
Its viscosity can be measured with this viscosimeter with gas, but the method for measuring for liquid its viscosity is numerous：Such as turning barrel
Method, falling ball method, cup viscometer method, capillary tube method etc. are not difficult to measure the value of its viscosity；And it is then relatively more tired for gas
Hardly possible measures its viscosity, usually can accurately measure its viscosity with oscillating disk viscometer, and the price of oscillating disk viscometer is very high
It is expensive, it is not easy to popularize, so that finding a kind of simple and low-cost measuring method seems meaningful.
Summary of the invention
The purpose of the present invention is to provide a kind of at the uniform velocity capillary viscometers and its Viscosity Measurement Methods, for detecting fluid
Viscosity.
The technical solution adopted by the present invention is that：At the uniform velocity capillary viscometer, including fluid source, conduit, regulating valve, miniflow
Meter, capillary and micro-differential pressure gauge；The fluid source is connected to by conduit with capillary, be equipped on the conduit regulating valve with
Micro-flowmeter, the regulating valve are arranged between fluid source and micro-flowmeter, and the capillary both ends are simultaneously connected to micro-differential pressure gauge.
At the uniform velocity capillary viscometer Viscosity Measurement Methods, include the following steps：
One, after connecting device, regulating valve is opened, control fluid flow is fixed value；
Two, the numerical value of first group of micro-flowmeter and micro-differential pressure gauge is recorded；
Three, regulating valve is adjusted, changes fluid flow, and record the numerical value of second group of micro-flowmeter and micro-differential pressure gauge；
Four, above-mentioned steps three are repeated as many times, the numerical value of multiple groups micro-flowmeter and micro-differential pressure gauge is recorded；
Five, the numerical value of multiple groups micro-flowmeter and the records of values of micro-differential pressure gauge is substituted into formulaSeek fluid
Viscosity average.
The beneficial effects of the present invention are：
The present invention is the measuring instrumentss that design according to viscosity formula derived from Poiseuille's formula, is mainly used for fluid
The measurement of (especially gas) viscosity, using the viscosity of capillary, micro-flowmeter and micro-differential pressure gauge measurement fluid, structure is simple,
It is low in cost, easy to use, be easy to universal and measuring accuracy is high, when measuring the viscosity of gas with it, solve existing gas
Viscosimeter is expensive, is not easy universal problem.
Detailed description of the invention
Fig. 1：Schematic structural view of the invention；
Fig. 2：Flow chart of the present invention；
Wherein：1- fluid source；2- conduit；3- regulating valve；4- micro-flowmeter；5- capillary；6- micro-differential pressure gauge.
Specific embodiment
As shown in Figure 1 and Figure 2, at the uniform velocity capillary viscometer, including fluid source 1, conduit 2, regulating valve 3, micro-flowmeter 4, hair
Tubule 5 and micro-differential pressure gauge 6；The fluid source 1 is connected to by conduit 2 with capillary 5, and fluid source 1 is passed through in conduit 2 at the uniform velocity to flow
Dynamic fluid, regulating valve 3 and micro-flowmeter 4 are equipped on the conduit 2, and the regulating valve 3 is arranged in fluid source 1 and micrometeor
Between meter 4,5 both ends of capillary are simultaneously connected to micro-differential pressure gauge 6.
The inner circle radius surface r=0.1--0.05cm of the capillary 5, and be horizontally mounted in a device.
The micro-flowmeter 4 uses suspended body flowmeter, and measurement range is 0.5ml/s--5ml/s.
The measurement range of the micro-differential pressure gauge 6 is 0--30Pa.
At the uniform velocity capillary viscometer Viscosity Measurement Methods, include the following steps：
One, after connecting device, regulating valve 3 is opened, control fluid flow is fixed value；
Two, the numerical value of first group of micro-flowmeter 4 and micro-differential pressure gauge 6 is recorded；
Three, regulating valve 3 is adjusted, changes fluid flow, and record the numerical value of second group of micro-flowmeter 4 and micro-differential pressure gauge 6；
Four, above-mentioned steps three are repeated as many times, the numerical value of multiple groups micro-flowmeter 4 and micro-differential pressure gauge 6 is recorded；
Five, the numerical value of multiple groups micro-flowmeter 4 and the records of values of micro-differential pressure gauge 6 is brought into formulaSeek fluid
Viscosity average.
The working principle of the invention：When fluid is flowed in capillary 5 with laminar condition, flow and 5 liang of capillary
The pressure difference at end follows Poiseuille's formula, if fluid flows through, the flow of capillary 5 is Q, the length of capillary 5 is L, capillary 5
Inner circle radius surface be r, the pressure difference at 5 both ends of capillary is P, then had according to Poiseuille's formula：
Wherein η is the viscosity of fluid.It can be obtained by the calculation formula of fluid viscosity η according to this formula：
Here the length L of capillary 5 and inner circle radius surface r are just accurately measured before measuring, and working as fluid source 1 will
Fluid to be measured can be measured by micro-flowmeter 4 and micro-differential pressure gauge 6 and be flowed through when especially gas pressurized flows through capillary 5
The fluid of capillary 5 especially gas flow and it is formed by differential pressure at 5 both ends of capillary, this numerical value is substituted into above-mentioned formula
In can be in the hope of the viscosity of required fluid.
It should be noted that can be changed by the flow that capillary 5 is flowed through in the adjusting of regulating valve 3, when flow changes
When micro-differential pressure gauge 6 on differential pressure value also accordingly synchronization proportionally change so that resulting viscosity number is the same.
In order to confirm above-mentioned analysis, we have done an actual measurement, the parameter of the capillary 5 used for L=3.23cm,
R=0.075cm, it is 0.5ml/s--5ml/s, the differential pressure of selection that the micro-flowmeter 4 of selection, which is suspended body flowmeter its measurement range,
The measurement range of table 6 is 0--30Pa.Pressurized gas is the air when room temperature is 25 DEG C, presses through the Q that capillary 5 measures
=2ml/s, P=10Pa, substituting into formula can be in the hope of η=19.23 × 10-6Pa.s.It can be seen that at the uniform velocity 5 viscosimeter gas of capillary
The viscosity number of gas can be precisely measured out.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of at the uniform velocity capillary viscometer, it is characterised in that：Including fluid source (1), conduit (2), regulating valve (3), micrometeor
Count (4), capillary (5) and micro-differential pressure gauge (6)；The fluid source (1) is connected to by conduit (2) with capillary (5), the conduit
(2) regulating valve (3) and micro-flowmeter (4) be installed on, regulating valve (3) setting fluid source (1) and micro-flowmeter (4) it
Between, capillary (5) both ends are simultaneously connected to micro-differential pressure gauge (6).
2. a kind of at the uniform velocity capillary viscometer according to claim 1, it is characterised in that：The inner circle of the capillary (5)
Radius surface r=0.1--0.05cm, and be horizontally mounted in a device.
3. a kind of at the uniform velocity capillary viscometer according to claim 1, it is characterised in that：The survey of the micro-flowmeter (4)
Measuring range is 0.5ml/s--5ml/s.
4. a kind of at the uniform velocity capillary viscometer according to claim 1, it is characterised in that：The survey of the micro-differential pressure gauge (6)
Measuring range is 0--30Pa.
5. it is a kind of using at the uniform velocity capillary viscometer Viscosity Measurement Methods described in any claim in Claims 1-4 4,
It is characterized in that：Include the following steps：
One, after connecting device, regulating valve (3) are opened, control fluid flow is fixed value；
Two, the numerical value of first group of micro-flowmeter (4) and micro-differential pressure gauge (6) is recorded；
Three, regulating valve (3) are adjusted, changes fluid flow, and record the numerical value of second group of micro-flowmeter (4) and micro-differential pressure gauge (6)；
Four, above-mentioned steps three are repeated as many times, the numerical value of multiple groups micro-flowmeter (4) and micro-differential pressure gauge (6) is recorded；
Five, the numerical value of multiple groups micro-flowmeter (4) and the records of values of micro-differential pressure gauge (6) is substituted into formulaSeek fluid
Viscosity average.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811005497.0A CN108872018A (en) | 2018-08-30 | 2018-08-30 | At the uniform velocity capillary viscometer and its Viscosity Measurement Methods |
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| CN201811005497.0A CN108872018A (en) | 2018-08-30 | 2018-08-30 | At the uniform velocity capillary viscometer and its Viscosity Measurement Methods |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295578A (en) * | 2021-05-14 | 2021-08-24 | 上海神开石油科技有限公司 | Online measurement device and method for viscosity of upward-returning drilling fluid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329245A (en) * | 2007-06-22 | 2008-12-24 | 中国人民解放军军事医学科学院野战输血研究所 | Liquid line flow resistance force detection device and method for detecting drag reduction effect of drag reducer |
| CN103226086A (en) * | 2013-04-02 | 2013-07-31 | 中国石油天然气股份有限公司 | Online high-temperature high-pressure viscosity rapid measuring device for rock core displacement experiment |
| CN108169071A (en) * | 2018-03-14 | 2018-06-15 | 北京科技大学 | Oil viscosity detection device under a kind of ultra-high voltage environment |
| CN208937459U (en) * | 2018-08-30 | 2019-06-04 | 杨钧程 | At the uniform velocity capillary viscometer |
-
2018
- 2018-08-30 CN CN201811005497.0A patent/CN108872018A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329245A (en) * | 2007-06-22 | 2008-12-24 | 中国人民解放军军事医学科学院野战输血研究所 | Liquid line flow resistance force detection device and method for detecting drag reduction effect of drag reducer |
| CN103226086A (en) * | 2013-04-02 | 2013-07-31 | 中国石油天然气股份有限公司 | Online high-temperature high-pressure viscosity rapid measuring device for rock core displacement experiment |
| CN108169071A (en) * | 2018-03-14 | 2018-06-15 | 北京科技大学 | Oil viscosity detection device under a kind of ultra-high voltage environment |
| CN208937459U (en) * | 2018-08-30 | 2019-06-04 | 杨钧程 | At the uniform velocity capillary viscometer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295578A (en) * | 2021-05-14 | 2021-08-24 | 上海神开石油科技有限公司 | Online measurement device and method for viscosity of upward-returning drilling fluid |
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Application publication date: 20181123 |