CN102749268A - Full automatic multi-tube capillary viscometer - Google Patents
Full automatic multi-tube capillary viscometer Download PDFInfo
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- CN102749268A CN102749268A CN2012102617755A CN201210261775A CN102749268A CN 102749268 A CN102749268 A CN 102749268A CN 2012102617755 A CN2012102617755 A CN 2012102617755A CN 201210261775 A CN201210261775 A CN 201210261775A CN 102749268 A CN102749268 A CN 102749268A
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Abstract
The invention discloses a full automatic multi-tube capillary viscometer which comprises a control system, a pneumatic system, a reference liquid public injection loop, a reference liquid detection loop and at least one sample detection loop. The capillary viscometer adopts a gas-liquid isolator to connect a plurality of capillaries in parallel to enable two ends of each capillary to receive identical pressure at any time and to be measured simultaneously. The capillary viscometer well resolves the problem in the prior art that the existing viscometer cannot ensure identical measuring conditions of measurement everytime, is low in accuracy, is affected by temperature, is complex in operation step and the like, and is capable of achieving automatic online measurement.
Description
Technical field
The present invention relates to a kind of full-automatic multitube capillary viscosimeter.
Background technology
Viscosity measurement is well-known in the importance in many industrial sectors and scientific research field; Very extensive in sector applications such as oil, chemical industry, medical science; The quality restriction of for example various petroleum products and paint etc.; All need carry out viscosity measurement, the viscosity of in medical science, measuring blood and biofluid has very important clinical meaning.The automatic control of production run of some food and medicine etc. also will realize through monitoring viscosity, can also come control reaction end automatically through the viscosity of monitoring synthetic reaction product.Viscosity measurement commonly used has capillary viscosimeter (like Ostwald viscosimeter), measures viscosity with capillary viscosimeter, and general the employing is to measure delivery time method (measuring the delivery time of solvent and sample respectively).When measuring viscosity in this way, start and end time is not easy accurate judgement, and each condition of measuring is difficult to guarantee identical; So ratio of precision is lower, temperature influence is big, complex operation step; Be difficult to realize robotization, use duration, kapillary cleans also very numb numerous etc.
Summary of the invention
To above-mentioned prior art; The invention provides a kind of full-automatic multitube capillary viscosimeter; The present invention adopts solution-air isolator (this is to guarantee the identical key of pressure) a plurality of capillary parallelings together; Make each any moment of two ends capillaceous all receive the effect of uniform pressure; And be the scheme of measuring simultaneously, this scheme has solved well and can not guarantee each identical, difficult problems of measuring such as precision is low, temperature influence is big, complex operation step of condition in the prior art, and can realize automatic on-line measurement.
The present invention realizes through following technical scheme:
A kind of full-automatic multitube capillary viscosimeter comprises that control system, pneumatic system, the public infusion circuit of reference liquid, reference liquid detect loop and at least one sample detection loop, wherein,
The structure that reference liquid injects common return is: comprise elastic bag formula air driven pump and reference liquid bottle I, the fluid inlet end of elastic bag formula air driven pump is connected with reference liquid bottle I pipeline;
The structure that said reference liquid detects the loop is: comprise reference liquid bottle II, solution-air isolator, kapillary, the bottle of weighing, weighing device, waste liquid bottle and two elastic bag formula air driven pumps: elastic bag formula air driven pump I, elastic bag formula air driven pump II; Wherein, The fluid inlet end of elastic bag formula air driven pump I is connected with reference liquid bottle II pipeline; The liquid outlet end of elastic bag formula air driven pump I is connected with the fluid inlet end pipeline of solution-air isolator; The liquid outlet end of solution-air isolator is connected with the kapillary pipeline, and kapillary is connected with bottle pipeline of weighing; The fluid inlet end of elastic bag formula air driven pump II is connected with bottle pipeline of weighing, and the liquid outlet end of elastic bag formula air driven pump II is connected with the waste liquid bottle pipeline; The bottle of weighing is positioned on the weighing device;
The structure in said sample detection loop is: comprise sample bottle, solution-air isolator, kapillary, the bottle of weighing, weighing device, waste liquid bottle and two elastic bag formula air driven pumps: elastic bag formula air driven pump I, elastic bag formula air driven pump II; Wherein, The fluid inlet end of elastic bag formula air driven pump I is connected with the sample bottle pipeline; The liquid outlet end of elastic bag formula air driven pump I is connected with the fluid inlet end pipeline of solution-air isolator; The liquid outlet end of solution-air isolator is connected with the kapillary pipeline, and kapillary is connected with bottle pipeline of weighing; The fluid inlet end of elastic bag formula air driven pump II is connected with bottle pipeline of weighing, and the liquid outlet end of elastic bag formula air driven pump II is connected with the waste liquid bottle pipeline; The bottle of weighing is positioned on the weighing device;
Be equipped with valve on said elastic bag formula air driven pump and the pipeline that reference liquid bottle I is connected, on elastic bag formula air driven pump I and the pipeline that reference liquid bottle II is connected, on elastic bag formula air driven pump I and the pipeline that sample bottle is connected and on solution-air isolator and the pipeline that kapillary is connected;
Said pneumatic system is provided with two output terminal: A output roads and B output road;
The gas port end that charges and discharge of said elastic bag formula air driven pump is connected with the B output road pipeline of pneumatic system through reversing solenoid valve;
The gas port that charges and discharge of said solution-air isolator is connected with the A output road pipeline of pneumatic system through reversing solenoid valve;
The liquid outlet end of the elastic bag formula air driven pump of the public infusion circuit of said reference liquid is connected with the fluid inlet end pipeline of the solution-air isolator on every galley proof product examine survey time road respectively;
Said pneumatic system, reversing solenoid valve, weighing device are connected with the control system circuit respectively.
The pneumatic pump structure of said elastic bag formula is: comprise housing; Form a cavity---liquid storage cylinder in the housing; Be provided with elastic bag in the liquid storage cylinder, the housing upper end is provided with and charges and discharge gas port, charges and discharge gas port and is communicated with elastic bag; The lower end of housing is provided with liquid outlet and liquid inlet, and liquid outlet and liquid inlet are communicated with liquid storage cylinder.
The structure of said solution-air isolator is: comprise housing, be provided with flexible partition in the housing, thereby enclosure interior is divided into two parts: the flexible partition top is inflatable chamber, and the below is a liquid storage cylinder; The housing upper end is provided with and charges and discharge gas port, charges and discharge gas port and is communicated with inflatable chamber, and the housing lower end is provided with liquid outlet and liquid inlet, and liquid outlet and liquid inlet are communicated with liquid storage cylinder.
Preferably, said valve is the gasbag-type operated pneumatic valve, and the structure of gasbag-type operated pneumatic valve is: comprise valve body, form a cavity in the valve body, the cavity both sides are fluid passage, are provided with elastic bag in the cavity, and elastic bag is provided with and charges and discharge gas port; Elastic bag is connected with the B output road pipeline of pneumatic system through reversing solenoid valve.
Further; Said elastic bag formula air driven pump I is provided with the pipeline loop with the pipeline that reference liquid bottle II is connected; The end in pipeline loop is communicated with the bottle of weighing, and pipeline and junction, pipeline loop are provided with hand-operated direction valve, and purpose is: when the needs on-line measurement; Through hand-operated direction valve elastic bag formula air driven pump I is converted to from the bottle of weighing gets reference liquid, can recycle reference liquid like this.
Further, on said elastic bag formula air driven pump I and the pipeline that the solution-air isolator is connected, on elastic bag formula air driven pump II and the pipeline that the bottle of weighing is connected, be equipped with retaining valve on elastic bag formula air driven pump II and the pipeline that waste liquid bottle is connected and on the elastic bag formula air driven pump of the public infusion circuit of reference liquid and the pipeline that the solution-air isolator on every galley proof product examine survey time road is connected.
Further, the elastic bag formula air driven pump of the public infusion circuit of said reference liquid is provided with liquid injection port and manually-operated gate with the pipeline that the solution-air isolator on every galley proof product examine survey time road is connected, can be through the manually fluid injection in liquid injection port of manual impregnator during use.
Further, for guaranteeing not receive in the measuring process interference of temperature variation, reference liquid bottle, sample bottle, elastic bag formula air driven pump, solution-air isolator, gasbag-type operated pneumatic valve, kapillary etc. all can be put into calibration cell.
Said sample detection loop can be provided with many as required, 2,3,4,5 ... All can.
Preferably, the housing of said elastic bag formula air driven pump and solution-air isolator all is by constituting through bolted two parts up and down.
Said control system, pneumatic system, weighing device, calibration cell all are conventional equipments of the prior art, are routine techniques, are to realize that easily the present invention does not have improvements to this, repeat no more as far as one of ordinary skill in the art.
In addition; The weighing device that reference liquid detects in loop/sample detection loop can be shared; That is: need not every reference liquid detection loop/sample detection loop and all independently prepare a cover weighing device; Many or all reference liquids detect loop/sample detection loops can a shared cover weighing device, and method is that shared weighing device timesharing is carried out, and this is to realize easily as far as one of ordinary skill in the art.
Principle of work: link (same pneumatic supply on the same source of the gas to each end capillaceous through the solution-air isolator; Adjustable in pressure and stable); The other end is in the identical atmospheric environment; The pressure that so just can guarantee each kapillary two ends is all identical, when fluid flows through each kapillary, all receives identical pressure effect constantly.Through detecting the volume (V that in the identical time (t), flows through reference liquid capillaceous and sample
0And V
n) ratio, the formula ［ η r=K (V of the Fluid Computation viscosity of deriving according to Poiseuille law (P==KQ η) again
0/ V
n), calculate relative viscosity by microprocessor.
The derivation of equation is following:
P=K
0Q
0η
0(reference liquid kapillary)
P=K
nQ
nη
n(sample kapillary)
P: the pressure at kapillary two ends; (P=P
2-P
1P
2Bleed pressure; P
1: Q atmospheric pressure)
0: the volumetric flow rate of reference liquid; Q
n: the volumetric flow rate of sample; η
0:: the viscosity of reference liquid; η
n: the viscosity of sample; K
0: reference liquid geometric constant capillaceous; K
n: sample geometric constant capillaceous (L: length capillaceous; R: radius capillaceous).
Equate by pressure: K
nQ
nη
n=K
0Q
0η
0
η
n/η
0=K
0Q
0∕K
nQ
n=K
0Q
0t∕K
nQ
nt=K
0V
0∕K
nV
n
Obtain formula: η
r=K (V
0/ V
n)
K: (K=K
0/ K
n) the viscosity apparatus constant; η
r: (η
r=η
n/ η
0) relative viscosity; V
0: the volume of reference liquid; V
n: the volume of sample.
Fluid volume ratio (V
0/ V
n) measurement obtain (this also is an innovative point of the present invention) indirectly through weighing device; Method is: decide a subscript before each the measurement earlier; The reference liquid and the sample that measure equal volume with accurate micro suction dispenser (special special-purpose precision measuringtoll is such as micro syringe) are respectively weighed, and are a standard unit with reference liquid then; Sample is calibrated, and being decided to be a unit equally (like this can cancellation constant m
n/ m
o), so just realized volume ratio (V with weighing device (weighing and sensing can reach very high precision) measurement fluid
0/ V
n), need not carry out density measure again (, being easy to realize) to one of ordinary skill in the art.
According to being: V
0/ V
n=(W
0/ W
n) (m
n/ m
o).(m
n/ m
o) be constant (quality is a constant)
Formula identity is following:
ρ
0=m
0/ V
0ρ
n=m
n/ V
nOrder: V
n=V
0
ρ
0/ρ
n=(m
0/V
0)/(m
n/V
n)=m
o/m
n ρ
0=ρ
n(m
o/m
n)
V
0/V
n=(m
0/ρ
0)/(m
n/ρ
n)=(m
0g/ρ
0)/(m
ng/ρ
n)=W
0/[ρ
n(m
o/m
n)]/W
nρ
n=(W
0/W
n)(m
n/m
o)
Obtain formula: V
0/ V
n=(W
0/ W
n) (m
n/ m
o)
ρ
n: sample rate; ρ
0: the density of solvent; W
n: example weight; W
o: weight of solvent; V
n: sample volume; V
0: solvent volume; m
n: sample quality m
o:; Solvent quality; G: acceleration of gravity.
The course of work of full-automatic multitube capillary viscosimeter of the present invention is following:
(1) liquid storage cylinder in emptying gasbag-type air driven pump (comprising elastic bag formula air driven pump I, elastic bag formula air driven pump II and elastic bag formula air driven pump) and the solution-air isolator; For imbibition is prepared: process is: the circuit that control system control is relevant is connected; Pneumatic system is through corresponding reversing solenoid valve; Elastic bag in whole elastic bag formula air driven pumps is inflated with the inflatable chamber in whole gas-liquid isolators, discharges the gas in the liquid storage cylinder in (through a gasbag-type operated pneumatic valve and a kapillary).
(2) suck reference liquid: process is: the circuit that control system control is relevant breaks off; Elastic bag in the elastic bag formula air driven pump I in the elastic bag formula air driven pump of the public infusion circuit of reference liquid and reference liquid detection loop shrinks venting through corresponding reversing solenoid valve and (annotates: inflation when reversing solenoid valve is switched on; Exit during outage), liquid storage cylinder sucks reference liquid (from reference liquid bottle I and reference liquid bottle II, drawing) simultaneously.
(3) inject reference liquid to the solution-air isolator: process is: the circuit that control system control is relevant is connected; Interlock circuit breaks off (inflatable chamber that makes the solution-air isolator is through corresponding solenoid valve venting) simultaneously; Pneumatic system detects the elastic bag inflation in the elastic bag formula air driven pump I in loop through corresponding reversing solenoid valve to the elastic bag formula air driven pump of the public infusion circuit of reference liquid and reference liquid; Inject the reference liquid in the elastic bag formula air driven pump solution-air isolator in three sample detection loops; Inject the solution-air isolator that reference liquid detects the loop to the reference liquid in the elastic bag formula air driven pump I in reference liquid detection loop; Simultaneously, the gasbag-type operated pneumatic valve is closed.
(4) measure viscometer constant K value: (measurement of K is only just carried out when renewing kapillary) process is: the circuit that control system control is relevant is connected, and simultaneously corresponding circuit breaks off and makes the gasbag-type operated pneumatic valve open-minded, and pneumatic system is through corresponding reversing solenoid valve; Inflate to the solution-air isolator; Reference liquid flows under gas pressure in the corresponding kapillary, flows in the bottle of weighing thereafter, by weighing device it is weighed; Its signal send control system to handle after amplifier amplifies, and accomplishes and measures K (K
1n, K
2n, k
3n).
(5) the emptying bottle of weighing: process is: the circuit that control system control is relevant breaks off; Elastic bag in the corresponding elastic bag formula air driven pump II shrinks venting through reversing solenoid valve; The simultaneously corresponding liquid storage cylinder inspiration reference liquid (emptying is less demanding, and remaining click-through is crossed zero clearing and just solved) in the bottle of weighing.
(6) be discharged to liquid in the waste liquid bottle: process is: the circuit that control system control is relevant is connected, and pneumatic system is through corresponding reversing solenoid valve, and the elastic bag inflation in the elastic bag formula air driven pump II of correspondence is extruded into reference liquid in the waste liquid bottle.
(7) suck sample and reference liquid: process is: the circuit that control system control is relevant breaks off, and the elastic bag in the elastic bag formula air driven pump I shrinks venting through corresponding reversing solenoid valve, and liquid storage cylinder sucks sample/reference liquid simultaneously.
(8) isolate injection sample and reference liquid to solution-air: process is: the circuit that control system control is relevant is connected; Simultaneously corresponding circuit breaks off; Pneumatic system is through the elastic bag inflation of corresponding reversing solenoid valve in elastic bag formula air driven pump I; Inject the solution-air isolator to the sample in the liquid storage cylinder of elastic bag formula air driven pump I/reference liquid, the gasbag-type operated pneumatic valve is closed simultaneously.
(9) measuring samples: process is: the circuit that control system control is relevant is connected, and simultaneously corresponding circuit breaks off and makes the gasbag-type operated pneumatic valve open-minded, and pneumatic system is through corresponding reversing solenoid valve; Inflate to the solution-air isolator; Reference liquid/sample flows under gas pressure in the kapillary, flows in the bottle of weighing thereafter, by weighing device it is weighed; Its signal send control system to handle after amplifier amplifies, and accomplishes sample measurement.After measurement finished, reference liquid and sample can be discharged in the waste liquid bottle through above-mentioned steps (5) (6).
Full-automatic multitube capillary viscosimeter of the present invention, the effect and the characteristics of its main element are following:
The effect of solution-air isolator is: after liquid storage cylinder charges into liquid; Pneumatic pipe cleaner is crossed the non-resistance transfer function of flexible partition to liquid; Make it to flow into (the solution-air isolator is original creation parts of the present invention) in the kapillary; It has guaranteed that promptly each kapillary receives the same pressure effect, and gas-liquid is isolated each other, and the liquid in each kapillary can not mix mutually simultaneously.Because simple and compact for structure, be again through gas-operated, so can directly be connected (make connecting line very short) through the gasbag-type operated pneumatic valve with kapillary; Can eliminate the influence of pipeline like this, corrosion-resistant, because of cost very low; Can disposablely use, when changing sample, can save cleaning.
The effect of elastic bag formula air driven pump is: send into the reference liquid in sample in the sample bottle or the reference liquid bottle in the solution-air isolator; Another effect is to extract the liquid in the bottle of weighing out to send into (elastic bag formula air driven pump is original creation parts of the present invention) in the waste liquid bottle; When elastic bag is inflated; The liquid of liquid storage cylinder is pumped out, and when the elastic bag elastic shrinkage, sucks liquid from the outside; Flow is to confirming that by gasbag-type operated pneumatic valve and retaining valve this provides assurance for getting liquid automatically.Since simple and compact for structure, be again through gas-operated, easily in the connection of pipeline; Can disposablely use, save cleaning pump, corrosion-resistant; The volumetric ratio solution-air isolator of elastic bag formula air driven pump is a lot of greatly; Can fully guarantee to the fluid injection of solution-air isolator, because of there not being problem stuck as mechanical pump, therefore the sensor of judging the topping up situation need not be set (because of gas has the fast characteristics of transmission speed as long as very short time just can be accomplished fluid injection) again.
The effect of gasbag-type operated pneumatic valve is: control fluid break-make (the gasbag-type operated pneumatic valve is original creation parts of the present invention) under the control system effect, and characteristics are opening and closing reliable, the resistance of convection cell can be ignored; Aim at the design of this viscosity meter, be particularly suitable in low pressure line, using, compare with the valve of physical construction; Structure very simple (can with pipe do one that pipeline is connected is simple and convenient); Size is little, and is corrosion-resistant, and cost is very low; Can disposablely use, can remove cleaning from.
The effect of reversing solenoid valve is: control pneumatic system and elastic bag formula air driven pump and gasbag-type operated pneumatic valve are made corresponding action under the control system effect; Get controls automatically such as liquid measurement with completion; This is conventional as far as one of ordinary skill in the art, realizes easily.
Pneumatic system is divided the output of A, B two-way, and the A road provides air pressure for the solution-air isolator, and pressure adopts PID control, and air pressure can regulate, to adapt to the needs of measuring different fluid.B road air pressure is given elastic bag formula air driven pump and gasbag-type operated pneumatic valve air feed greater than the A road.
Full-automatic multitube capillary viscosimeter of the present invention; Compare with traditional capillary viscosimeter, owing to adopt unique solution-air isolator, a plurality of capillary parallelings together; Make each any moment of two ends capillaceous all receive the effect of uniform pressure; (when pressure changes, because variable quantity is identical, so variable quantity is at V
OWith V
NRatio in by cancellation, can eliminate the influence of the fluctuation of pressure like this, make measuring accuracy be greatly improved.Because relative viscosity (η r) only depends on the ratio of volume, volume ratio (V
o/ V
n) detection accomplish through LOAD CELLS; Because existing LOAD CELLS has very high sensitivity and stability (precision like electronic balance can reach 0.001mg); Therefore; Measure sensitivity very high (subtle change of the flow that is caused by the subtle change of viscosity can both be come out through LOAD CELLS is measured), and stability is very high.
Because the viscosity of solvent and sample liquids is synchro measure under identical temperature environment, measurement be again relative viscosity (other viscosity can be calculated according to it), in this instrument, the relative viscosity value only depends on the ratio (V of volume
o/ V
n), when measuring V
oWith V
nRatio the time, identical variable quantity has been cancelled in comparing, so the disturbance of temperature slackened greatly, so temperature influence little (this is very important to high-precision instrument) requires also low to the temperature controlling of calibration cell.
Owing to measuring on year-on-year basis through long-pending body and adopting high-precision weight sensor, realized very high-precision measurement in a word to viscosity.
Because of what adopt is indirect measurement, and the weighing apparatus sensing does not link to each other with pipe system, does not disturb so can not produce pipeline, and this has further improved precision, is convenient to simultaneously expand.
Can carry out the measurement of a plurality of samples automatically simultaneously (and can expand at any time; Increase the sample detection loop, can expand adding, need not increase weighing device with the form of enlargement module; Method is that shared weighing device timesharing is carried out, and this is to realize easily as far as one of ordinary skill in the art).And measuring speed is fast, and very time saving and energy saving (having suffered as long as be put into sample bottle to sample) therefore improved efficient greatly.Can carry out on-line automatic measurement, need only the fluid supply that changes sample bottle into on-line measurement, just can easily realize on-line automatic measurement, this helps realizing the automatic control of production run.
Because the gas transmission is flexible transmission, make being connected and settling all very flexibly of kapillary and pipeline can make like this and change very simple and convenient that kapillary becomes, when the replacing sample, just can measure as long as change a new kapillary horse back.Because of the capillary pipe structure very simple (being exactly a thin straight tube) that uses is easy to clean, also can disposablely use.
Because of what adopt is that pneumatic drive adds unique pneumatic element (capsule formula air driven pump, solution-air isolator, gasbag-type operated pneumatic valve three organic assembling), and institute is so that the unusual compact of structure automatically partly.
When accuracy requirement is not high, can make reference without the reference solvent, the viscosity of directly coming the test sample article, (η through measurement volumes
n=kPt/V; V=W/ ρ; ρ can obtain by tabling look-up, also can be through measuring, and pressure P is to adopt PID control, precision can meet the demands).
The pressure of pressure source A can be regulated and can adapt to the needs of measuring different fluid.
In addition, the present invention is simple to operate in addition, and is easy to use, and few the maintenance manufactured easily low cost and other advantages.
Description of drawings
Fig. 1 is the structural representation of full-automatic multitube capillary viscosimeter of the present invention.
Fig. 2 is a measuring principle synoptic diagram of the present invention.
Fig. 3 is the structural representation of solution-air isolator of the present invention.
Fig. 4 is the structural representation of elastic bag formula air driven pump of the present invention.
Fig. 5 is the structural representation of gasbag-type operated pneumatic valve of the present invention.
Fig. 6 is the configuring condition synoptic diagram in the calibration cell of the present invention.
Wherein, 1, pneumatic system; 2, control system; 3, elastic bag formula air driven pump I; 4, elastic bag formula air driven pump II; 5, reversing solenoid valve; 6, elastic bag formula air driven pump; 7, solution-air isolator; 8, retaining valve; 9, gasbag-type operated pneumatic valve; 10, reference liquid bottle I; 11, hand-operated direction valve; 12, kapillary; 13, sample bottle; 14, the bottle of weighing; 15, waste liquid bottle; 16, pan of a steelyard; 17, LOAD CELLS; 18, amplifier; 19, liquid injection port; 20, manual impregnator; 21, manually-operated gate; 22, reference liquid bottle II; 23, charge and discharge gas port; 24, housing; 25, inflatable chamber; 26, flexible partition; 27, liquid storage cylinder; 28, liquid inlet; 29, liquid outlet; 30, elastic bag; 31, calibration cell.A representes A output road; B representes B output road; Lowercase a, b, c, d ... Q, m, x, y, z indication circuit connect, as: two a of place are arranged among the figure, represent that then this two places circuit connects.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
A kind of full-automatic multitube capillary viscosimeter, as shown in Figure 1, comprise that control system 2, pneumatic system 1, the public infusion circuit of reference liquid, reference liquid detect loop and three galley proof product examine survey time roads, wherein,
The structure of the public infusion circuit of reference liquid is: comprise elastic bag formula air driven pump 6 and reference liquid bottle I 10, the fluid inlet end of elastic bag formula air driven pump 6 is connected with reference liquid bottle I 10 pipelines;
The structure that said reference liquid detects the loop is: comprise reference liquid bottle II 22, solution-air isolator 7, kapillary 12, the bottle 14 of weighing, weighing device (comprise the scale pan 16, LOAD CELLS 17 and amplifier 18; Be conventional structure of the prior art), waste liquid bottle 15 and two elastic bag formula air driven pumps: elastic bag formula air driven pump I 3, elastic bag formula air driven pump II 4; Wherein, The fluid inlet end of elastic bag formula air driven pump I 3 is connected with reference liquid bottle II 22 pipelines; The liquid outlet end of elastic bag formula air driven pump I 3 is connected with the fluid inlet end pipeline of solution-air isolator 7; The liquid outlet end of solution-air isolator 7 is connected with kapillary 12 pipelines, and kapillary 12 is connected with bottle 14 pipelines of weighing; The fluid inlet end of elastic bag formula air driven pump II 4 is connected with bottle 14 pipelines of weighing, and the liquid outlet end of elastic bag formula air driven pump II 4 is connected with waste liquid bottle 15 pipelines; The bottle 14 of weighing is positioned on the weighing device;
The structure in said sample detection loop is: comprise sample bottle 13, solution-air isolator 7, kapillary 12, weigh bottle 14, weighing device, waste liquid bottle 15 and two elastic bag formula air driven pumps: elastic bag formula air driven pump I 3, elastic bag formula air driven pump II 4; Wherein, The fluid inlet end of elastic bag formula air driven pump I 3 is connected with sample bottle 13 pipelines; The liquid outlet end of elastic bag formula air driven pump I 3 is connected with the fluid inlet end pipeline of solution-air isolator 7; The liquid outlet end of solution-air isolator 7 is connected with kapillary 12 pipelines, and kapillary 12 is connected with bottle 14 pipelines of weighing; The fluid inlet end of elastic bag formula air driven pump II 4 is connected with bottle 14 pipelines of weighing, and the liquid outlet end of elastic bag formula air driven pump II 4 is connected with waste liquid bottle 15 pipelines; The bottle 14 of weighing is positioned on the weighing device;
Be equipped with gasbag-type operated pneumatic valve 9 on said elastic bag formula air driven pump 6 and the pipeline that reference liquid bottle I 10 is connected, on elastic bag formula air driven pump I 3 and the pipeline that reference liquid bottle II 22 is connected, on elastic bag formula air driven pump I 3 and the pipeline that sample bottle 13 is connected and on solution-air isolator 7 and the pipeline that kapillary 12 is connected;
Said pneumatic system 1 is provided with two output terminal: A output roads and B output road;
The gas port end that charges and discharge of said elastic bag formula air driven pump 6, elastic bag formula air driven pump I 3, elastic bag formula air driven pump II 4 is exported the road pipeline through reversing solenoid valve 5 with the B of pneumatic system 1 and is connected;
The gas port that charges and discharge of said solution-air isolator 7 is connected with the A output road pipeline of pneumatic system 1 through reversing solenoid valve 5;
The liquid outlet end of the elastic bag formula air driven pump 6 of the public infusion circuit of said reference liquid is connected with the fluid inlet end pipeline of the solution-air isolator 7 on every galley proof product examine survey time road respectively;
Said pneumatic system 1, reversing solenoid valve 5, weighing device are connected with control system 2 circuit respectively.
The structure of said elastic bag formula air driven pump 6 (elastic bag formula air driven pump I 3, elastic bag formula air driven pump II 4 are with elastic bag formula air driven pump 6) is: comprise housing 24; Form a cavity---liquid storage cylinder 27 in the housing 24; Be provided with elastic bag 30 in the liquid storage cylinder 27; Housing 24 upper ends are provided with and charge and discharge gas port 23, charge and discharge gas port 23 and are communicated with elastic bag 30, and the lower end of housing 24 is provided with liquid outlet 29 and liquid inlet 28; Liquid outlet 29 is communicated with liquid storage cylinder 27 with liquid inlet 28, and is as shown in Figure 4.
The structure of said solution-air isolator is: comprise housing 24, be provided with flexible partition 26 in the housing 24, thereby housing 24 inside are divided into two parts: flexible partition 26 tops are inflatable chamber 25, and the below is a liquid storage cylinder 27; Housing 24 upper ends are provided with and charge and discharge gas port 23, charge and discharge gas port 23 and are communicated with inflatable chamber 25, and housing 24 lower ends are provided with liquid outlet 29 and liquid inlet 28, and liquid outlet 29 is communicated with liquid storage cylinder 27 with liquid inlet 28, and is as shown in Figure 3.
The structure of said gasbag-type operated pneumatic valve 9 is: comprise valve body, form a cavity in the valve body, the cavity both sides are fluid passage, are provided with elastic bag 30 in the cavity, and elastic bag 30 is provided with and charges and discharge gas port 23; Elastic bag 30 is connected with the B output road pipeline of pneumatic system 1 through reversing solenoid valve 5, and is as shown in Figure 5.
The pipeline that said elastic bag formula air driven pump I 3 is connected with reference liquid bottle II 22 is provided with the pipeline loop; The end in pipeline loop is communicated with the bottle 14 of weighing; Pipeline and junction, pipeline loop are provided with hand-operated direction valve 11; Purpose is: when the needs on-line measurement, through hand-operated direction valve 11 elastic bag formula air driven pump I 3 is converted to from the bottle 14 of weighing and get reference liquid, can save reference liquid like this.
Be equipped with retaining valve 8 on said elastic bag formula air driven pump I 3 and the pipeline that solution-air isolator 7 is connected, on elastic bag formula air driven pump II 4 and the pipeline that the bottle 14 of weighing is connected, on elastic bag formula air driven pump II 4 and the pipeline that waste liquid bottle 15 is connected and on the elastic bag formula air driven pump 6 of the public infusion circuit of reference liquid and the pipeline that the solution-air isolator 7 on every galley proof product examine survey time road is connected.
The pipeline that the elastic bag formula air driven pump 6 of the public infusion circuit of said reference liquid is connected with the solution-air isolator 7 on every galley proof product examine survey time road is provided with liquid injection port 19 and manually-operated gate 21, can be through the manually fluid injection in liquid injection port 19 of manual impregnator 20 during use.
The housing of said elastic bag formula air driven pump 6 (elastic bag formula air driven pump I 3, elastic bag formula air driven pump II 4 are with elastic bag formula air driven pump 6) and solution-air isolator 7 all is by constituting through bolted two parts up and down.
Principle of work: link (same pneumatic supply on the same source of the gas to an end of each kapillary 12 through solution-air isolator 7; Adjustable in pressure and stable); The other end is in the identical atmospheric environment; The pressure that so just can guarantee each kapillary 12 two ends is all identical, when fluid flows through each kapillary 12, all receives identical pressure effect constantly.In the identical time (t), flow through the reference liquid of kapillary 12 and the volume (V of sample through detecting
0And V
n) ratio, the formula ［ η r==K (V of the Fluid Computation viscosity of deriving according to Poiseuille law (P=KQ η) again
0/ V
n), calculate relative viscosity by microprocessor (parts of control system 2).
The derivation of equation is following:
P=K
0Q
0η
0(reference liquid kapillary)
P=K
nQ
nη
n(sample kapillary)
P: the pressure at kapillary two ends; (P=P
2-P
1P
2Bleed pressure; P
1: Q atmospheric pressure)
0: the volumetric flow rate of reference liquid; Q
n: the volumetric flow rate of sample; η
0:: the viscosity of reference liquid; η
n: the viscosity of sample; K
0: reference liquid geometric constant capillaceous; K
n: sample geometric constant capillaceous (L: length capillaceous; R: radius capillaceous).
Equate by pressure: K
nQ
nη
n=K
0Q
0η
0
η
n/η
0=K
0Q
0∕K
nQ
n=K
0Q
0t∕K
nQ
nt=K
0V
0∕K
nV
n
Obtain formula: η
r=K (V
0/ V
n)
K: (K=K
0/ K
n) the viscosity apparatus constant; η
r: (η
r=η
n/ η
0) relative viscosity; V
0: the volume of reference liquid; V
n: the volume of sample, as shown in Figure 2, among the figure, the kapillary 12 of high order end detects the kapillary on the loop for reference liquid, and all the other are the kapillary on the sample detection loop.
Fluid volume ratio (V
0/ V
n) measurement obtain (this also is an innovative point of the present invention) indirectly through weighing device; Method is: decide a subscript before each the measurement earlier; The reference liquid and the sample that measure equal volume with accurate micro suction dispenser (special special-purpose precision measuringtoll is such as micro syringe) are respectively weighed, and are a standard unit with reference liquid then; Sample is calibrated, and being decided to be a unit equally (like this can cancellation constant m
o/ m
n), so just realized volume ratio (V with weighing device (weighing and sensing can reach very high precision) measurement fluid
0/ V
n), need not carry out density measure again (, being easy to realize) to one of ordinary skill in the art.
According to being: V
0/ V
n=(W
0/ W
n) (m
n/ m
o).(m
n/ m
o) be constant (quality is a constant)
Formula identity is following:
ρ
0=m
0/ V
0ρ
n=m
n/ V
nOrder: V
n=V
0
ρ
0/ρ
n=(m
0/V
0)/(m
n/V
n)=m
o/m
n ρ
0=ρ
n(m
o/m
n)
V
0/V
n=(m
0/ρ
0)/(m
n/ρ
n)=(m
0g/ρ
0)/(m
ng/ρ
n)=W
0/[ρ
n(m
o/m
n)]/W
nρ
n=(W
0/W
n)(m
n/m
o)
Obtain formula: V
0/ V
n=(W
0/ W
n) (m
n/ m
o)
ρ
n: sample rate; ρ
0: the density of solvent; W
n: example weight; W
o: weight of solvent; V
n: sample volume; V
0: solvent volume; m
n: sample quality m
o:; Solvent quality; G: acceleration of gravity.
The course of work is following:
(1) liquid storage cylinder 27 in emptying gasbag-type air driven pump (comprising elastic bag formula air driven pump I 3, elastic bag formula air driven pump II 4 and elastic bag formula air driven pump 6) and the solution-air isolator 7; Be that imbibition prepares: process is: the circuit that control system 2 controls are relevant (a, b ... I, n, o, p, q) connect (annotate: j, k, l, m disconnect); Pneumatic system 1 through corresponding reversing solenoid valve 5 (5a, 5b ... 5i, 5n, 5o, 5p, 5q); Elastic bag 30 in whole elastic bag formula air driven pumps is inflated with the inflatable chamber 25 in whole solution-air isolators 7, discharges (through gasbag-type operated pneumatic valve 9 and 4 kapillaries) to the gas in the liquid storage cylinder 27.
(2) suck reference liquid: process is: the circuit (a, b) that control system 2 controls are relevant breaks off; Elastic bag 30 in the elastic bag formula air driven pump I 3 in elastic bag formula air driven pump 6 and reference liquid detection loop shrinks venting through corresponding reversing solenoid valve 5 (5a, 5b) and (annotates: inflation when reversing solenoid valve is switched on; Exit during outage), liquid storage cylinder sucks reference liquid (from reference liquid bottle I 10 and reference liquid bottle II 22, drawing) simultaneously.
(3) inject reference liquid to solution-air isolator 7: process is: the circuit (a, b, j, k, l, m) that control system 2 controls are relevant is connected; Circuit (c, e, g, i) breaks off (inflatable chamber 25 that makes solution-air isolator 7 is through corresponding solenoid valve 5c, 5e, 5g, 5i venting) simultaneously; Pneumatic system 1 detects elastic bag 30 inflations in the elastic bag formula air driven pump I 3 in loop through corresponding reversing solenoid valve 5 (5a, 5b) to elastic bag formula air driven pump 6 and reference liquid; Inject the reference liquid in the elastic bag formula air driven pump 6 the solution-air isolator 7 in three sample detection loops; Inject the solution-air isolator 7 that reference liquid detects the loop to the reference liquid in the elastic bag formula air driven pump I 3 in reference liquid detection loop; Simultaneously, gasbag-type operated pneumatic valve 9 is closed.
(4) measure viscometer constant K value: process is: the circuit (c, e, g, i) that control system 2 controls are relevant is connected; Circuit (j, k, l, m) breaks off and makes gasbag-type operated pneumatic valve 9 open-minded simultaneously; Pneumatic system 1 is through corresponding reversing solenoid valve 5 (5c, 5e, 5g, 5i), and to 7 inflations of solution-air isolator, reference liquid flows in the corresponding kapillary 12 under gas pressure; Thereafter flow into 14 li in the bottle of weighing; By weighing device it is weighed, its signal send control system 2 to handle after amplifier 18 amplifies, and accomplishes and measures K.
(5) the emptying bottle of weighing: process is: the circuit (n, o, p, q) that control system 2 controls are relevant breaks off; Elastic bag 30 in the corresponding elastic bag formula air driven pump II 4 shrinks venting through reversing solenoid valve 5 (5n, 5o, 5p, 5q), the simultaneously corresponding liquid storage cylinder 27 inspirations reference liquid in the bottle 14 of weighing.
(6) be discharged to liquid in the waste liquid bottle 15: process is: the circuit (n, o, p, q) that control system 2 controls are relevant is connected; Pneumatic system 1 is through corresponding reversing solenoid valve 5 (5n, 5o, 5p, 5q); Elastic bag 30 inflations in the elastic bag formula air driven pump II 4 of correspondence are extruded into reference liquid in the waste liquid bottle 15.
(7) suck sample and reference liquid: process is: the circuit (b, d, f, h) that control system 2 controls are relevant breaks off; Elastic bag 30 in the elastic bag formula air driven pump I 3 shrinks venting through corresponding reversing solenoid valve 5 (5b, 5d, 5f, 5h), and liquid storage cylinder 27 sucks sample/reference liquid simultaneously.
(8) isolate injection sample and reference liquid to solution-air: process is: relevant circuit (b, d, f, the h of control system 2 controls; J, k, l, m) connect; Circuit (c, e, g, i) breaks off simultaneously; Pneumatic system 1 is injected solution-air isolator 7 to the sample in the liquid storage cylinder 27 of elastic bag formula air driven pump I 3/reference liquid through elastic bag 30 inflations of corresponding reversing solenoid valve 5 (5b, 5d, 5f, 5h) in elastic bag formula air driven pump I 3, and gasbag-type operated pneumatic valve 9 is closed simultaneously.
(9) measuring samples: process is: the circuit (c, e, g, i) that control system 2 controls are relevant is connected, and circuit (j, k, l, m) breaks off and makes gasbag-type operated pneumatic valve 9 open-minded simultaneously, and pneumatic system 1 is through corresponding reversing solenoid valve 5; To 7 inflations of solution-air isolator; Reference liquid/sample flows under gas pressure in the kapillary 12, flows into 14 li in the bottle of weighing thereafter, by weighing device it is weighed; Its signal send control system 2 to handle after amplifier 18 amplifies, and accomplishes sample measurement.
Charge and discharge gas port during reversing solenoid valve 5 energising and be communicated with source of the gas and inflate, charge and discharge gas port during outage and atmosphere is exitted.
The kapillary 12 in three sample detection loops can be surveyed same sample, also can survey different samples.
For guaranteeing not receive in the measuring process interference of temperature variation, reference liquid bottle, sample bottle, elastic bag formula air driven pump, solution-air isolator, gasbag-type operated pneumatic valve, kapillary etc. all can be put into calibration cell, and be as shown in Figure 6.
Claims (10)
1. full-automatic multitube capillary viscosimeter is characterized in that: comprise that control system, pneumatic system, the public infusion circuit of reference liquid, reference liquid detect loop and at least one sample detection loop, wherein,
The structure of the public infusion circuit of reference liquid is: comprise elastic bag formula air driven pump and reference liquid bottle I, the fluid inlet end of elastic bag formula air driven pump is connected with reference liquid bottle I pipeline;
The structure that said reference liquid detects the loop is: comprise reference liquid bottle II, solution-air isolator, kapillary, the bottle of weighing, weighing device, waste liquid bottle and two elastic bag formula air driven pumps: elastic bag formula air driven pump I, elastic bag formula air driven pump II; Wherein, The fluid inlet end of elastic bag formula air driven pump I is connected with reference liquid bottle II pipeline; The liquid outlet end of elastic bag formula air driven pump I is connected with the fluid inlet end pipeline of solution-air isolator; The liquid outlet end of solution-air isolator is connected with the kapillary pipeline, and kapillary is connected with bottle pipeline of weighing; The fluid inlet end of elastic bag formula air driven pump II is connected with bottle pipeline of weighing, and the liquid outlet end of elastic bag formula air driven pump II is connected with the waste liquid bottle pipeline; The bottle of weighing is positioned on the weighing device;
The structure in said sample detection loop is: comprise sample bottle, solution-air isolator, kapillary, the bottle of weighing, weighing device, waste liquid bottle and two elastic bag formula air driven pumps: elastic bag formula air driven pump I, elastic bag formula air driven pump II; Wherein, The fluid inlet end of elastic bag formula air driven pump I is connected with the sample bottle pipeline; The liquid outlet end of elastic bag formula air driven pump I is connected with the fluid inlet end pipeline of solution-air isolator; The liquid outlet end of solution-air isolator is connected with the kapillary pipeline, and kapillary is connected with bottle pipeline of weighing; The fluid inlet end of elastic bag formula air driven pump II is connected with bottle pipeline of weighing, and the liquid outlet end of elastic bag formula air driven pump II is connected with the waste liquid bottle pipeline; The bottle of weighing is positioned on the weighing device;
Be equipped with valve on said elastic bag formula air driven pump and the pipeline that reference liquid bottle I is connected, on elastic bag formula air driven pump I and the pipeline that reference liquid bottle II is connected, on elastic bag formula air driven pump I and the pipeline that sample bottle is connected and on solution-air isolator and the pipeline that kapillary is connected;
Said pneumatic system is provided with two output terminal: A output roads and B output road;
The gas port end that charges and discharge of said elastic bag formula air driven pump is connected with the B output road pipeline of pneumatic system through reversing solenoid valve;
The gas port that charges and discharge of said solution-air isolator is connected with the A output road pipeline of pneumatic system through reversing solenoid valve;
The liquid outlet end of the elastic bag formula air driven pump of the public infusion circuit of said reference liquid is connected with the fluid inlet end pipeline of the solution-air isolator on every galley proof product examine survey time road respectively;
Said pneumatic system, reversing solenoid valve, weighing device are connected with the control system circuit respectively.
2. a kind of full-automatic multitube capillary viscosimeter according to claim 1; It is characterized in that: the pneumatic pump structure of said elastic bag formula is: comprise housing, form a cavity-liquid storage cylinder in the housing, be provided with elastic bag in the liquid storage cylinder; The housing upper end is provided with and charges and discharge gas port; Charge and discharge gas port and be communicated with elastic bag, the lower end of housing is provided with liquid outlet and liquid inlet, and liquid outlet and liquid inlet are communicated with liquid storage cylinder.
3. a kind of full-automatic multitube capillary viscosimeter according to claim 1; It is characterized in that: the structure of said solution-air isolator is: comprise housing; Be provided with flexible partition in the housing, thereby enclosure interior is divided into two parts: the flexible partition top is inflatable chamber, and the below is a liquid storage cylinder; The housing upper end is provided with and charges and discharge gas port, charges and discharge gas port and is communicated with inflatable chamber, and the housing lower end is provided with liquid outlet and liquid inlet, and liquid outlet and liquid inlet are communicated with liquid storage cylinder.
4. a kind of full-automatic multitube capillary viscosimeter according to claim 1; It is characterized in that: said valve is the gasbag-type operated pneumatic valve; The structure of gasbag-type operated pneumatic valve is: comprise valve body, form a cavity in the valve body, the cavity both sides are fluid passage; Be provided with elastic bag in the cavity, elastic bag is provided with and charges and discharge gas port; Elastic bag is connected with the B output road pipeline of pneumatic system through reversing solenoid valve.
5. a kind of full-automatic multitube capillary viscosimeter according to claim 1; It is characterized in that: said elastic bag formula air driven pump I is provided with the pipeline loop with the pipeline that reference liquid bottle II is connected; The end in pipeline loop is communicated with the bottle of weighing, and pipeline and junction, pipeline loop are provided with hand-operated direction valve.
6. a kind of full-automatic multitube capillary viscosimeter according to claim 1 is characterized in that: be equipped with retaining valve on said elastic bag formula air driven pump I and the pipeline that the solution-air isolator is connected, on elastic bag formula air driven pump II and the pipeline that the bottle of weighing is connected, on elastic bag formula air driven pump II and the pipeline that waste liquid bottle is connected and on the elastic bag formula air driven pump of the public infusion circuit of reference liquid and the pipeline that the solution-air isolator on every galley proof product examine survey time road is connected.
7. a kind of full-automatic multitube capillary viscosimeter according to claim 1 is characterized in that: the elastic bag formula air driven pump of the public infusion circuit of said reference liquid is provided with liquid injection port and manually-operated gate with the pipeline that the solution-air isolator on every galley proof product examine survey time road is connected.
8. a kind of full-automatic multitube capillary viscosimeter according to claim 1 is characterized in that: the weighing device that said reference liquid detects in loop/sample detection loop is shared.
9. a kind of full-automatic multitube capillary viscosimeter according to claim 1 is characterized in that: the housing of said elastic bag formula air driven pump and solution-air isolator all is by constituting through bolted two parts up and down.
10. the method for application of the described a kind of full-automatic multitube capillary viscosimeter of claim 1, it is characterized in that: step is following:
(1) liquid storage cylinder in emptying gasbag-type air driven pump and the solution-air isolator; For imbibition is prepared: process is: the circuit that control system control is relevant is connected; Pneumatic system is through corresponding reversing solenoid valve; Elastic bag in whole elastic bag formula air driven pumps is inflated with the inflatable chamber in whole solution-air isolators, discharges the gas in the liquid storage cylinder;
(2) suck reference liquid: process is: the circuit that control system control is relevant breaks off; Elastic bag in the elastic bag formula air driven pump I in the elastic bag formula air driven pump of the public infusion circuit of reference liquid and reference liquid detection loop shrinks venting through corresponding reversing solenoid valve, the reference liquid of liquid storage cylinder suction simultaneously;
(3) inject reference liquid to the solution-air isolator: process is: the circuit that control system control is relevant is connected; Interlock circuit breaks off the gasbag-type operated pneumatic valve is closed simultaneously; Pneumatic system detects the elastic bag inflation in the elastic bag formula air driven pump I in loop through corresponding reversing solenoid valve to the elastic bag formula air driven pump of the public infusion circuit of reference liquid and reference liquid; The solution-air isolator in three sample detection loops of the injection of the reference liquid in the elastic bag formula air driven pump, inject the solution-air isolator that reference liquid detects the loop to the reference liquid in the elastic bag formula air driven pump I in reference liquid detection loop;
(4) measure viscometer constant K value: process is: the circuit that control system control is relevant is connected, and simultaneously corresponding circuit breaks off and makes the gasbag-type operated pneumatic valve open-minded, and pneumatic system is through corresponding reversing solenoid valve; Inflate to the solution-air isolator; Reference liquid flows under gas pressure in the corresponding kapillary, flows in the bottle of weighing thereafter, by weighing device it is weighed; Its signal send control system to handle, and accomplishes and measures K;
(5) the emptying bottle of weighing: process is: the circuit that control system control is relevant breaks off, and the elastic bag in the elastic bag formula air driven pump II shrinks venting through reversing solenoid valve, the simultaneously corresponding liquid storage cylinder inspiration reference liquid in the bottle of weighing;
(6) be discharged to liquid in the waste liquid bottle: process is: the circuit that control system control is relevant is connected, and pneumatic system is through corresponding reversing solenoid valve, and the elastic bag inflation in the elastic bag formula air driven pump II of correspondence is extruded into reference liquid in the waste liquid bottle;
(7) suck sample and reference liquid: process is: the circuit that control system control is relevant breaks off, and the elastic bag in the elastic bag formula air driven pump I shrinks venting through corresponding reversing solenoid valve, and liquid storage cylinder sucks sample/reference liquid simultaneously;
(8) isolate injection sample and reference liquid to solution-air: process is: the circuit that control system control is relevant is connected; Simultaneously corresponding circuit breaks off the gasbag-type operated pneumatic valve is closed; Pneumatic system is injected the solution-air isolator to the sample in the liquid storage cylinder of elastic bag formula air driven pump I/reference liquid through the elastic bag inflation of corresponding reversing solenoid valve in elastic bag formula air driven pump I;
(9) measuring samples: process is: the circuit that control system control is relevant is connected, and simultaneously corresponding circuit breaks off and makes the gasbag-type operated pneumatic valve open-minded, and pneumatic system is through corresponding reversing solenoid valve; Inflate to the solution-air isolator; Reference liquid/sample flows under gas pressure in the kapillary, flows in the bottle of weighing thereafter, by weighing device it is weighed; Its signal send control system to handle, and accomplishes sample measurement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261775.5A CN102749268B (en) | 2012-07-26 | 2012-07-26 | Full automatic multi-tube capillary viscometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261775.5A CN102749268B (en) | 2012-07-26 | 2012-07-26 | Full automatic multi-tube capillary viscometer |
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| Publication Number | Publication Date |
|---|---|
| CN102749268A true CN102749268A (en) | 2012-10-24 |
| CN102749268B CN102749268B (en) | 2014-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525656A (en) * | 2016-11-30 | 2017-03-22 | 上海大学 | Portable viscosity detection device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114159U (en) * | 1991-10-18 | 1992-08-26 | 中国矿业大学北京研生部 | Multi-capillary viscometer |
| JPH06174626A (en) * | 1992-12-10 | 1994-06-24 | Nippon Mektron Ltd | Electrical viscosity fluid measuring device |
| CN202676569U (en) * | 2012-07-26 | 2013-01-16 | 山东大学 | Fully-automatic multi-capillary-tube viscometer |
-
2012
- 2012-07-26 CN CN201210261775.5A patent/CN102749268B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114159U (en) * | 1991-10-18 | 1992-08-26 | 中国矿业大学北京研生部 | Multi-capillary viscometer |
| JPH06174626A (en) * | 1992-12-10 | 1994-06-24 | Nippon Mektron Ltd | Electrical viscosity fluid measuring device |
| CN202676569U (en) * | 2012-07-26 | 2013-01-16 | 山东大学 | Fully-automatic multi-capillary-tube viscometer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525656A (en) * | 2016-11-30 | 2017-03-22 | 上海大学 | Portable viscosity detection device |
| CN106525656B (en) * | 2016-11-30 | 2023-12-12 | 上海大学 | Portable viscosity detection device |
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|---|---|
| CN102749268B (en) | 2014-10-22 |
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