CN102749268B - Full automatic multi-tube capillary viscometer - Google Patents
Full automatic multi-tube capillary viscometer Download PDFInfo
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- CN102749268B CN102749268B CN201210261775.5A CN201210261775A CN102749268B CN 102749268 B CN102749268 B CN 102749268B CN 201210261775 A CN201210261775 A CN 201210261775A CN 102749268 B CN102749268 B CN 102749268B
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- elastic bag
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- driven pump
- air driven
- bottle
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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 of many industrial sectors and field of scientific study, very extensive in sector applications such as oil, chemical industry, medical science, the such as quality restriction of various petroleum products and paint etc., all need to carry out viscosity measurement, the viscosity of measuring blood and biofluid in medical science has very important clinical meaning (about the discussion of capillary viscosimeter point formula, Liu Yalan, Zhang Chongjun, Physical Experiment, the 5th the 4th phase of volume, in August, 1985).The automatic control of production run of some food and medicine etc. also will realize by monitoring viscosity, can also, by the viscosity of monitoring synthetic reaction product, automatically control reaction end.Conventional viscosity measurement has capillary viscosimeter (as Ostwald viscosimeter), measures viscosity with capillary viscosimeter, and general employing is to measure delivery time method (measuring respectively the delivery time of solvent and sample) (CN101852711A).While measuring viscosity in this way, start and end time is not easy accurate judgement, and each condition of measuring is difficult to ensure identical, so ratio of precision is lower, temperature influence is large, complex operation step, be difficult to realize robotization, with duration, kapillary cleans also very numb numerous etc.
Summary of the invention
For 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 ensure the identical key of pressure) multiple capillary parallelings together, make any moment of each two ends capillaceous be subject to the effect of uniform pressure, and be the scheme of simultaneously measuring, this scheme has solved difficult problems such as can not ensureing each condition of measuring is identical, precision is low, temperature influence is large, complex operation step in prior art well, and can realize automatic on-line measurement.
The present invention is achieved by the following technical solutions:
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 described reference liquid detects 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 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 waste liquid bottle pipeline; The bottle of weighing is positioned on weighing device;
The structure in described 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 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 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 waste liquid bottle pipeline; The bottle of weighing is positioned on weighing device;
On the pipeline that described elastic bag formula air driven pump is connected with reference liquid bottle I, on the pipeline that is connected with reference liquid bottle II of elastic bag formula air driven pump I, on the pipeline that is connected with sample bottle of elastic bag formula air driven pump I and on the pipeline that is connected with kapillary of solution-air isolator, be equipped with valve;
Described pneumatic system is provided with two output terminal: A output roads and B output road;
The gas port end that charges and discharge of described elastic bag formula air driven pump is connected with the B output road pipeline of pneumatic system by reversing solenoid valve;
The gas port that charges and discharge of described solution-air isolator is connected with the A output road pipeline of pneumatic system by reversing solenoid valve;
The liquid outlet end of the elastic bag formula air driven pump of the public infusion circuit of described 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;
Described pneumatic system, reversing solenoid valve, weighing device are connected with control system circuit respectively.
The pneumatic pump structure of described elastic bag formula is: comprise housing, in housing, form a cavity---liquid storage cylinder, in liquid storage cylinder, be provided with elastic bag, housing upper end is provided with and charges and discharge gas port, charging and discharging gas port 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 described solution-air isolator is: comprise housing, be provided with flexible partition, thereby enclosure interior is divided into two parts in housing: flexible partition top is inflatable chamber, and below is liquid storage cylinder; Housing upper end is provided with and charges and discharge gas port, charges and discharge gas port and is communicated with inflatable chamber, and housing lower end is provided with liquid outlet and liquid inlet, and liquid outlet and liquid inlet are communicated with liquid storage cylinder.
Preferably, described valve is gasbag-type operated pneumatic valve, and the structure of gasbag-type operated pneumatic valve is: comprise valve body, form a cavity in valve body, cavity both sides are fluid passage, are provided with elastic bag in 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 by reversing solenoid valve.
Further, described elastic bag formula air driven pump I is provided with pipeline loop with the pipeline that reference liquid bottle II is connected, the end in pipeline loop is communicated with the bottle of weighing, pipeline and junction, pipeline loop are provided with hand-operated direction valve, object is: in the time of needs on-line measurement, can make elastic bag formula air driven pump I convert to from the bottle of weighing by hand-operated direction valve gets reference liquid, can recycle like this reference liquid.
Further, on the pipeline that described elastic bag formula air driven pump I is connected with solution-air isolator, elastic bag formula air driven pump II with weigh on the pipeline that is connected of bottle, on pipeline that elastic bag formula air driven pump II is connected with waste liquid bottle and on the pipeline that is connected with the solution-air isolator on every galley proof product examine survey time road of the elastic bag formula air driven pump of the public infusion circuit of reference liquid, be equipped with retaining valve.
Further, the elastic bag formula air driven pump of the public infusion circuit of described 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 by manual impregnator to manually fluid injection in liquid injection port when use.
Further, for ensureing not to be subject in measuring process the 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.
Described sample detection loop can arrange many as required, 2,3,4,5 ... all can.
Preferably, the housing of described elastic bag formula air driven pump and solution-air isolator is to be all made up of the two parts up and down that are bolted.
Described control system, pneumatic system, weighing device, calibration cell are all conventional equipments of the prior art, are routine techniques, are easily to realize for one of ordinary skill in the art, and the present invention, repeats no more without improvements this.
In addition, the weighing device that reference liquid detects in loop/sample detection loop can share, that is: detect loop/sample detection loop without every reference liquid and all independently prepare a set of weighing device, many or all reference liquids detect loop/sample detection loop can share a set of weighing device, method is to share weighing device timesharing to carry out, and this is easily to realize for one of ordinary skill in the art.
Principle of work: (same pneumatic supply on same source of the gas is linked to by solution-air isolator in each one end capillaceous, pressure is adjustable and stable), the other end is in identical atmospheric environment, the pressure that so just can ensure each kapillary two ends is identical, in the time that fluid flows through each kapillary, the moment is all subject to identical pressure-acting.By detecting the volume (V that flows through reference liquid capillaceous and sample in same time (t)
0and V
n) ratio, then the formula ［ η r=K (V of the Fluid Computation viscosity of deriving according to Poiseuille law (P=KQ η)
0/ V
n), calculate relative viscosity by microprocessor.
The derivation of equation is as follows:
P=K
0q
0η
0(reference liquid kapillary)
P=K
nq
nη
n(sample kapillary)
K
0=8L
0/лR
0 4
K
n=8L
n/лR
n 4
P: the pressure at kapillary two ends; (P=P
2-P
1p
2bleed pressure; P
1: atmospheric pressure) Q
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).
Equated 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) 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 indirectly obtain (this is also an innovative point of the present invention) by weighing device, method is: before each measurement, first determine a subscript, with precise micro aspirator (special Special precision measurer, such as micro syringe) reference liquid and the sample that measure respectively same volume weigh, then taking reference liquid as a standard unit, sample is calibrated, and being decided to be equally a unit (like this can cancellation constant m
n/ m
o), so just realize the volume ratio (V that measures fluid with weighing device (weighing and sensing can reach very high precision)
0/ V
n), need not carry out density measure again (for one of ordinary skill in the art, being easy to realize).
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 as follows:
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
nρ
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 as follows:
(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 solution-air isolator, for imbibition is prepared: process is: the circuit that control system control is relevant is connected, pneumatic system is by 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, the gas in liquid storage cylinder is discharged to (by gasbag-type operated pneumatic valve and an individual kapillary).
(2) suck reference liquid: process is: the circuit that control system control is relevant disconnects, 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 (note: inflate when reversing solenoid valve energising by corresponding reversing solenoid valve, when power-off, exit), liquid storage cylinder sucks reference liquid (drawing from reference liquid bottle I and reference liquid bottle II) simultaneously.
(3) inject reference liquid to solution-air isolator: process is: the circuit that control system control is relevant is connected, interlock circuit disconnects (making the inflatable chamber of solution-air isolator by corresponding solenoid valve venting) simultaneously, pneumatic system is inflated to the elastic bag in the elastic bag formula air driven pump of the public infusion circuit of reference liquid and the elastic bag formula air driven pump I in reference liquid detection loop by corresponding reversing solenoid valve, reference liquid in elastic bag formula air driven pump is injected to the solution-air isolator in three sample detection loops, reference liquid in the elastic bag formula air driven pump I in reference liquid detection loop is injected to the solution-air isolator in reference liquid detection loop, simultaneously, gasbag-type operated pneumatic valve is closed.
(4) measure viscometer constant K value: (measurement of K is only just carried out in the time renewing kapillary) process is: the circuit that control system control is relevant is connected, simultaneously corresponding circuit disconnects and makes gasbag-type operated pneumatic valve open-minded, pneumatic system is by corresponding reversing solenoid valve, inflate to solution-air isolator, reference liquid flows in corresponding kapillary under gas pressure, thereafter flow into and weigh in bottle, by weighing device, it is weighed, its signal send control system processing after amplifier amplifies, and completes 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 disconnects, elastic bag in corresponding elastic bag formula air driven pump II shrinks venting by reversing solenoid valve, the reference liquid (emptying less demanding, remaining click-through is crossed zero clearing and just solved) that simultaneously corresponding liquid storage cylinder inspiration is weighed in bottle.
(6) liquid is discharged in waste liquid bottle: process is: the circuit that control system control is relevant is connected, pneumatic system is by corresponding reversing solenoid valve, and the elastic bag in corresponding elastic bag formula air driven pump II is inflated, and reference liquid is extruded in waste liquid bottle.
(7) suck sample and reference liquid: process is: the circuit that control system control is relevant disconnects, and the elastic bag in elastic bag formula air driven pump I shrinks venting by corresponding reversing solenoid valve, and liquid storage cylinder sucks sample/reference liquid simultaneously.
(8) inject sample and reference liquid to solution-air isolation: process is: the circuit that control system control is relevant is connected, simultaneously corresponding circuit disconnects, pneumatic system is inflated to the elastic bag in elastic bag formula air driven pump I by corresponding reversing solenoid valve, sample in the liquid storage cylinder of elastic bag formula air driven pump I/reference liquid is injected to solution-air isolator, and gasbag-type operated pneumatic valve is closed simultaneously.
(9) measure sample: process is: the circuit that control system control is relevant is connected, simultaneously corresponding circuit disconnects and makes gasbag-type operated pneumatic valve open-minded, pneumatic system is by corresponding reversing solenoid valve, inflate to solution-air isolator, reference liquid/sample flows in kapillary under gas pressure, flows into and weighs in bottle thereafter, by weighing device, it is weighed, its signal send control system processing after amplifier amplifies, and completes sample measurement.After measurement, reference liquid and sample can be discharged in waste liquid bottle by above-mentioned steps (5) (6).
Full-automatic multitube capillary viscosimeter of the present invention, effect and the feature of its main element are as follows:
The effect of solution-air isolator is: when liquid storage cylinder is filled with after liquid, air pressure passes through the non-resistance transfer function of flexible partition to liquid, make it to flow into (solution-air isolator is original creation parts of the present invention) in kapillary, it ensured that each kapillary is subject to same pressure effect, can make again gas-liquid mutually isolate, the liquid in each kapillary can not mix mutually simultaneously.Due to simple and compact for structure, again by gas-operated, so can directly be connected by gasbag-type operated pneumatic valve (make connecting line very short) with kapillary, can eliminate like this impact of pipeline, corrosion-resistant, because cost is very low, can disposablely use, in the time changing sample, can save cleaning.
The effect of elastic bag formula air driven pump is: the reference liquid in the sample in sample bottle or reference liquid bottle is sent in solution-air isolator; Another effect is that the liquid of weighing in bottle is extracted out and sent into (elastic bag formula air driven pump is original creation parts of the present invention) in waste liquid bottle, in the time inflating to elastic bag, the liquid of liquid storage cylinder is pumped out, in the time of elastic bag elastic shrinkage, suck liquid from outside, liquid flows to by gasbag-type operated pneumatic valve and retaining valve to be determined, this provides guarantee for automatically getting liquid.Due to simple and compact for structure, again by gas-operated, easily in the connection of pipeline, can disposablely use, save the cleaning to pump, corrosion-resistant, the volumetric ratio solution-air isolator of elastic bag formula air driven pump is much larger, can fully ensure to the fluid injection of solution-air isolator, because not there is not problem stuck as mechanical pump, therefore need not arrange again judge topping up situation sensor (because of gas have the fast feature of transmission speed as long as very short time just can complete fluid injection).
The effect of gasbag-type operated pneumatic valve is: under control system effect, control fluid break-make (gasbag-type operated pneumatic valve is original creation parts of the present invention), feature is opening and closing reliable, the resistance of convection cell is negligible, aim at the design of this viscosity meter, be particularly suitable for using in low pressure line, compared 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, corrosion-resistant, cost is very low, can disposablely use, and can remove cleaning from.
The effect of reversing solenoid valve is: under control system effect, control pneumatic system and elastic bag formula air driven pump and gasbag-type operated pneumatic valve and do corresponding action, to complete controls automatically such as getting liquid measurement, this is conventional for one of ordinary skill in the art, easily realizes.
Pneumatic system is divided the output of A, B two-way, and A road provides air pressure to solution-air isolator, and pressure adopts PID to control, and air pressure can regulate, to adapt to measure the needs of different fluid.B road air pressure is greater than A road, gives elastic bag formula air driven pump and gasbag-type operated pneumatic valve air feed.
Full-automatic multitube capillary viscosimeter of the present invention, compared with traditional capillary viscosimeter, owing to adopting unique solution-air isolator, multiple capillary parallelings together, make any moment of each two ends capillaceous be subject to the effect of uniform pressure, (in the time that pressure changes, because variable quantity is identical, so variable quantity is at V
owith V
nratio in be eliminated, can eliminate like this impact of the fluctuation of pressure, measuring accuracy is greatly improved.Due to relative viscosity, (η r) only depends on the ratio of volume, volume ratio (V
o/ V
n) detection complete by LOAD CELLS, because existing LOAD CELLS has very high sensitivity and stability (as the precision of electronic balance can reach 0.001mg), therefore, measure the very high (subtle change of the flow being caused by the subtle change of viscosity of sensitivity, can be out measured by LOAD CELLS), 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, relative viscosity value only depends on the ratio (V of volume
o/ V
n), when measuring V
owith V
nratio time, identical variable quantity has been cancelled in comparing, therefore the disturbance of temperature has been slackened greatly, so temperature influence little (this is very important to high-precision instrument), the control of the temperature to calibration cell requires also low.
Owing to measuring on year-on-year basis and adopting high-precision weight sensor by long-pending body, realize the very high-precision measurement to viscosity in a word.
Be indirect measurement because of what adopt, weighing apparatus sensing is not connected with pipe system, so can pipeline not produced and be disturbed, this have further improved precision, is convenient to expand simultaneously.
Can automatically carry out the measurement of multiple samples (and can expand simultaneously at any time, increase sample detection loop, can expand and add with the form of enlargement module, need not increase weighing device, method is to share weighing device timesharing to carry out, and this is easily to realize for one of ordinary skill in the art).And measuring speed is fast, very time saving and energy saving (having suffered as long as sample is put into sample bottle), has therefore improved efficiency greatly.Can carry out on-line automatic measurement, as long as sample bottle is changed into the fluid supply of on-line measurement, just can easily realize on-line automatic measurement, this is conducive to realize the automatic control of production run.
Because gas transmission is Flexible Transmission, make being connected and settling all very flexibly of kapillary and pipeline, can make like this to change very simple and convenient that kapillary becomes, in the time changing sample, just can measure as long as change a new kapillary at once.Because the capillary pipe structure very simple (being exactly a thin straight tube) using is easy to clean, also can disposablely use.
That pneumatic drive adds unique pneumatic element (capsule formula air driven pump, solution-air isolator, gasbag-type operated pneumatic valve three organic assembling) because of what adopt, so make the very simple compactness of structure of part automatically.
In the time that accuracy requirement is not high, can make reference without reference solvent, directly carry out the viscosity of test sample product by measurement volumes, (η
n=kPt/V; V=W/ ρ; ρ can obtain by tabling look-up, also can be by measuring, and pressure P is to adopt PID to control, precision can meet the demands).
The pressure of pressure source A can regulate the needs that can adapt to measure different fluid.
In addition, the present invention is simple to operate in addition, easy to use, and few maintenance manufactured easily low cost and other advantages.
Brief description of the drawings
Fig. 1 is the structural representation of full-automatic multitube capillary viscosimeter of the present invention.
Fig. 2 is measuring principle schematic 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 schematic diagram in 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 represents A output road; B represents B output road; Lowercase a, b, c, d ... q, m, x, y, z indication circuit connect, as: in figure, there are two a of place, represent that this two places circuit connects.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
A kind of full-automatic multitube capillary viscosimeter, as shown in Figure 1, comprises 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 described reference liquid detects loop is: comprise reference liquid bottle II 22, solution-air isolator 7, kapillary 12, weigh bottle 14, weighing device (comprises the scale pan 16, LOAD CELLS 17 and amplifier 18, for 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, 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 weighing device,
The structure in described 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, 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 weighing device,
On the pipeline that described elastic bag formula air driven pump 6 is connected with reference liquid bottle I 10, on the pipeline that is connected with reference liquid bottle II 22 of elastic bag formula air driven pump I 3, on the pipeline that is connected with sample bottle 13 of elastic bag formula air driven pump I 3 and on the pipeline that is connected with kapillary 12 of solution-air isolator 7, be equipped with gasbag-type operated pneumatic valve 9;
Described 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 described elastic bag formula air driven pump 6, elastic bag formula air driven pump I 3, elastic bag formula air driven pump II 4 is connected with the B output road pipeline of pneumatic system 1 by reversing solenoid valve 5;
The gas port that charges and discharge of described solution-air isolator 7 is connected with the A output road pipeline of pneumatic system 1 by reversing solenoid valve 5;
The liquid outlet end of the elastic bag formula air driven pump 6 of the public infusion circuit of described 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;
Described pneumatic system 1, reversing solenoid valve 5, weighing device are connected with control system 2 circuit respectively.
Described 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) structure be: comprise housing 24, cavity of the interior formation of housing 24---liquid storage cylinder 27, in liquid storage cylinder 27, be provided with elastic bag 30, housing 24 upper ends are provided with and charge and discharge gas port 23, charging and discharging gas port 23 is communicated with elastic bag 30, the lower end of housing 24 is provided with liquid outlet 29 and liquid inlet 28, liquid outlet 29 and liquid inlet 28 are communicated with liquid storage cylinder 27, as shown in Figure 4.
The structure of described solution-air isolator is: comprise housing 24, be provided with flexible partition 26 in housing 24, thereby housing 24 inside are divided into two parts: flexible partition 26 tops are inflatable chamber 25, below is 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 and liquid inlet 28 are communicated with liquid storage cylinder 27, as shown in Figure 3.
The structure of described gasbag-type operated pneumatic valve 9 is: comprise valve body, form a cavity in valve body, cavity both sides are fluid passage, are provided with elastic bag 30 in 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 by reversing solenoid valve 5, as shown in Figure 5.
The pipeline that described elastic bag formula air driven pump I 3 is connected with reference liquid bottle II 22 is provided with 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, object is: in the time of needs on-line measurement, can make elastic bag formula air driven pump I 3 convert to from the bottle 14 of weighing by hand-operated direction valve 11 gets reference liquid, can save like this reference liquid.
On the pipeline that described elastic bag formula air driven pump I 3 is connected with solution-air isolator 7, elastic bag formula air driven pump II 4 with weigh on bottle 14 pipelines that are connected, on the pipeline that is connected with waste liquid bottle 15 of elastic bag formula air driven pump II 4 and pipeline that the elastic bag formula air driven pump 6 of the public infusion circuit of reference liquid is connected with the solution-air isolator 7 on every galley proof product examine survey time road on be equipped with retaining valve 8.
The elastic bag formula air driven pump 6 of the public infusion circuit of described reference liquid is provided with liquid injection port 19 and manually-operated gate 21 with the pipeline that the solution-air isolator 7 on every galley proof product examine survey time road is connected, can be by manual impregnator 20 to manually fluid injection in liquid injection port 19 when use.
Described 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 the housing of solution-air isolator 7 be all to be formed by the two parts up and down that are bolted.
Principle of work: (same pneumatic supply on same source of the gas is linked to by solution-air isolator 7 in one end of each kapillary 12, pressure is adjustable and stable), the other end is in identical atmospheric environment, the pressure that so just can ensure each kapillary 12 two ends is identical, in the time that fluid flows through each kapillary 12, the moment is all subject to identical pressure-acting.In same time (t), flow through the reference liquid of kapillary 12 and the volume (V of sample by detecting
0and V
n) ratio, then the formula ［ η r=K (V of the Fluid Computation viscosity of deriving according to Poiseuille law (P=KQ η)
0/ V
n), calculate relative viscosity by microprocessor (parts of control system 2).
The derivation of equation is as follows:
P=K
0q
0η
0(reference liquid kapillary)
P=K
nq
nη
n(sample kapillary)
K
0=8L
0/лR
0 4
K
n=8L
n/лR
n 4
P: the pressure at kapillary two ends; (P=P
2-P
1p
2bleed pressure; P
1: atmospheric pressure) Q
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).
Equated 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) 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, in figure, the kapillary 12 of high order end is the kapillary on reference liquid detection loop, all the other are the kapillary on sample detection loop.
Fluid volume ratio (V
0/ V
n) measurement indirectly obtain (this is also an innovative point of the present invention) by weighing device, method is: before each measurement, first determine a subscript, with precise micro aspirator (special Special precision measurer, such as micro syringe) reference liquid and the sample that measure respectively same volume weigh, then taking reference liquid as a standard unit, sample is calibrated, and being decided to be equally a unit (like this can cancellation constant m
o/ m
n), so just realize the volume ratio (V that measures fluid with weighing device (weighing and sensing can reach very high precision)
0/ V
n), need not carry out density measure again (for one of ordinary skill in the art, being easy to realize).
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 as follows:
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
nρ
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 as follows:
(1) emptying gasbag-type air driven pump (comprises 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 solution-air isolator 7 in liquid storage cylinder 27, for imbibition is prepared: process is: control system 2 is controlled relevant circuit (a, b, i, n, o, p, q) connect (note: j, k, l, m disconnects), pneumatic system 1 is by 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, gas in liquid storage cylinder 27 is discharged to (by 9 and 4 kapillaries of gasbag-type operated pneumatic valve).
(2) suck reference liquid: process is: control system 2 is controlled relevant circuit (a, b) disconnection, 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 is by corresponding reversing solenoid valve 5(5a, 5b) contraction venting (note: inflate when reversing solenoid valve energising, when power-off, exit), liquid storage cylinder sucks reference liquid (drawing from reference liquid bottle I 10 and reference liquid bottle II 22) simultaneously.
(3) inject reference liquid to solution-air isolator 7: process is: control system 2 is controlled relevant circuit (a, b, j, k, l, m) connect, circuit (c simultaneously, e, g, i) disconnect and (make the inflatable chamber 25 of solution-air isolator 7 by corresponding solenoid valve 5c, 5e, 5g, 5i venting), pneumatic system 1 is by corresponding reversing solenoid valve 5(5a, 5b, ) elastic bag 30 that detects to elastic bag formula air driven pump 6 and reference liquid in the elastic bag formula air driven pump I 3 in loop inflates, reference liquid in elastic bag formula air driven pump 6 is injected to the solution-air isolator 7 in three sample detection loops, reference liquid in the elastic bag formula air driven pump I 3 in reference liquid detection loop is injected to the solution-air isolator 7 in reference liquid detection loop, simultaneously, gasbag-type operated pneumatic valve 9 is closed.
(4) measure viscometer constant K value: process is: control system 2 is controlled relevant circuit (c, e, g, i) connection, simultaneously circuit (j, k, l, m) disconnects and makes gasbag-type operated pneumatic valve 9 open-minded, pneumatic system 1 is by corresponding reversing solenoid valve 5 (5c, 5e, 5g, 5i), inflate to solution-air isolator 7, reference liquid flows in corresponding kapillary 12 under gas pressure, thereafter flow into weigh bottle 14 li, by weighing device, it is weighed, its signal send control system 2 to process after amplifier 18 amplifies, and completes and measures K.
(5) the emptying bottle of weighing: process is: control system 2 is controlled relevant circuit (n, o, p, q) disconnection, elastic bag 30 in corresponding elastic bag formula air driven pump II 4 is by reversing solenoid valve 5(5n, 5o, 5p, 5q) shrink and exit, the reference liquid that simultaneously corresponding liquid storage cylinder 27 inspirations are weighed in bottle 14.
(6) liquid is discharged in waste liquid bottle 15: process is: control system 2 is controlled relevant circuit (n, o, p, q) connection, pneumatic system 1 is by corresponding reversing solenoid valve 5(5n, 5o, 5p, 5q), elastic bag 30 in corresponding elastic bag formula air driven pump II 4 is inflated, and reference liquid is extruded in waste liquid bottle 15.
(7) suck sample and reference liquid: process is: control system 2 is controlled relevant circuit (b, d, f, h) disconnection, elastic bag 30 in elastic bag formula air driven pump I 3 is by corresponding reversing solenoid valve 5(5b, 5d, 5f, 5h) shrink venting, liquid storage cylinder 27 sucks sample/reference liquid simultaneously.
(8) inject sample and reference liquid to solution-air isolation: process is: control system 2 is controlled relevant circuit (b, d, f, h, j, k, l, m) connection, circuit (c, e, g, i) disconnection simultaneously, pneumatic system 1 is by corresponding reversing solenoid valve 5(5b, 5d, 5f, 5h) elastic bag 30 in elastic bag formula air driven pump I 3 inflates, sample in the liquid storage cylinder 27 of elastic bag formula air driven pump I 3/reference liquid is injected to solution-air isolator 7, and gasbag-type operated pneumatic valve 9 is closed simultaneously.
(9) measure sample: process is: control system 2 is controlled relevant circuit (c, e, g, i) connection, simultaneously circuit (j, k, l, m) disconnects and makes gasbag-type operated pneumatic valve 9 open-minded, pneumatic system 1 is by corresponding reversing solenoid valve 5, inflate to solution-air isolator 7, reference liquid/sample flows in kapillary 12 under gas pressure, thereafter flow into weigh bottle 14 li, by weighing device, it is weighed, its signal send control system 2 to process after amplifier 18 amplifies, and completes sample measurement.
Reversing solenoid valve 5 charges and discharge gas port while energising and is communicated with and inflates with source of the gas, charges and discharge gas port and be communicated with and exit with atmosphere when power-off.
The kapillary 12 in three sample detection loops can be surveyed same sample, also can survey different samples.
For ensureing not to be subject in measuring process the 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, as shown in Figure 6.
Claims (10)
1. a 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 described reference liquid detects 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 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 waste liquid bottle pipeline; The bottle of weighing is positioned on weighing device;
The structure in described 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 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 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 waste liquid bottle pipeline; The bottle of weighing is positioned on weighing device;
On the pipeline that described elastic bag formula air driven pump is connected with reference liquid bottle I, on the pipeline that is connected with reference liquid bottle II of elastic bag formula air driven pump I, on the pipeline that is connected with sample bottle of elastic bag formula air driven pump I and on the pipeline that is connected with kapillary of solution-air isolator, be equipped with valve;
Described pneumatic system is provided with two output terminal: A output roads and B output road;
The gas port end that charges and discharge of described elastic bag formula air driven pump is connected with the B output road pipeline of pneumatic system by reversing solenoid valve;
The gas port that charges and discharge of described solution-air isolator is connected with the A output road pipeline of pneumatic system by reversing solenoid valve;
The liquid outlet end of the elastic bag formula air driven pump of the public infusion circuit of described 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;
Described pneumatic system, reversing solenoid valve, weighing device are connected with 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 described elastic bag formula is: comprise housing, in housing, form a cavity---liquid storage cylinder, in liquid storage cylinder, be provided with elastic bag, 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 described solution-air isolator is: comprise housing, in housing, be provided with flexible partition, thereby enclosure interior is divided into two parts: flexible partition top is inflatable chamber, and below is liquid storage cylinder; Housing upper end is provided with and charges and discharge gas port, charges and discharge gas port and is communicated with inflatable chamber, and 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: described valve is gasbag-type operated pneumatic valve, the structure of gasbag-type operated pneumatic valve is: comprise valve body, in valve body, form a cavity, cavity both sides are fluid passage, in cavity, be provided with elastic bag, elastic bag is provided with and charges and discharge gas port; Elastic bag is connected with the B output road pipeline of pneumatic system by reversing solenoid valve.
5. a kind of full-automatic multitube capillary viscosimeter according to claim 1, it is characterized in that: described elastic bag formula air driven pump I is provided with pipeline loop with the pipeline that reference liquid bottle II is connected, the end in pipeline loop is communicated with the bottle of weighing that reference liquid detects in loop, 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: on the pipeline that described elastic bag formula air driven pump I is connected with solution-air isolator, elastic bag formula air driven pump II with weigh on the pipeline that is connected of bottle, on pipeline that elastic bag formula air driven pump II is connected with waste liquid bottle and on the pipeline that is connected with the solution-air isolator on every galley proof product examine survey time road of the elastic bag formula air driven pump of the public infusion circuit of reference liquid, be equipped with retaining valve.
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 described 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 described reference liquid detects in loop/sample detection loop shares.
9. a kind of full-automatic multitube capillary viscosimeter according to claim 1, is characterized in that: the housing of described elastic bag formula air driven pump and solution-air isolator is to be all made up of the two parts up and down that are bolted.
10. the using method of a kind of full-automatic multitube capillary viscosimeter claimed in claim 1, is characterized in that: step is as follows:
(1) liquid storage cylinder in emptying gasbag-type air driven pump and solution-air isolator, for imbibition is prepared: process is: the circuit that control system control is relevant is connected, pneumatic system is by 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, and the gas in liquid storage cylinder is discharged;
(2) suck reference liquid: process is: the circuit that control system control is relevant disconnects, 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 by corresponding reversing solenoid valve, the reference liquid of liquid storage cylinder suction simultaneously;
(3) inject reference liquid to solution-air isolator: process is: the circuit that control system control is relevant is connected, interlock circuit disconnects gasbag-type operated pneumatic valve is closed simultaneously, pneumatic system is inflated to the elastic bag in the elastic bag formula air driven pump of the public infusion circuit of reference liquid and the elastic bag formula air driven pump I in reference liquid detection loop by corresponding reversing solenoid valve, reference liquid in elastic bag formula air driven pump is injected to the solution-air isolator in three sample detection loops, reference liquid in the elastic bag formula air driven pump I in reference liquid detection loop is injected to the solution-air isolator in reference liquid detection loop,
(4) measure viscometer constant K value: process is: the circuit that control system control is relevant is connected, simultaneously corresponding circuit disconnects and makes gasbag-type operated pneumatic valve open-minded, pneumatic system is by corresponding reversing solenoid valve, inflate to solution-air isolator, reference liquid flows in corresponding kapillary under gas pressure, flows into and weighs in bottle thereafter, by weighing device, it is weighed, its signal send control system processing, completes and measures K;
(5) the emptying bottle of weighing: process is: the circuit that control system control is relevant disconnects, and the elastic bag in elastic bag formula air driven pump II shrinks venting by reversing solenoid valve, the reference liquid that simultaneously corresponding liquid storage cylinder inspiration is weighed in bottle;
(6) liquid is discharged in waste liquid bottle: process is: the circuit that control system control is relevant is connected, pneumatic system is by corresponding reversing solenoid valve, and the elastic bag in corresponding elastic bag formula air driven pump II is inflated, and reference liquid is extruded in waste liquid bottle;
(7) suck sample and reference liquid: process is: the circuit that control system control is relevant disconnects, and the elastic bag in elastic bag formula air driven pump I shrinks venting by corresponding reversing solenoid valve, and liquid storage cylinder sucks sample/reference liquid simultaneously;
(8) inject sample and reference liquid to solution-air isolator: process is: the circuit that control system control is relevant is connected, simultaneously corresponding circuit disconnects gasbag-type operated pneumatic valve is closed, pneumatic system is inflated to the elastic bag in elastic bag formula air driven pump I by corresponding reversing solenoid valve, and the sample in the liquid storage cylinder of elastic bag formula air driven pump I/reference liquid is injected to solution-air isolator;
(9) measure sample: process is: the circuit that control system control is relevant is connected, simultaneously corresponding circuit disconnects and makes gasbag-type operated pneumatic valve open-minded, pneumatic system is by corresponding reversing solenoid valve, inflate to solution-air isolator, reference liquid/sample flows in kapillary under gas pressure, flows into and weighs in bottle thereafter, by weighing device, it is weighed, its signal send control system processing, completes sample measurement;
The pneumatic pump structure of described elastic bag formula is: comprise housing, in housing, form a cavity---liquid storage cylinder, in liquid storage cylinder, be provided with elastic bag, housing upper end is provided with and charges and discharge gas port, charging and discharging gas port 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 described solution-air isolator is: comprise housing, be provided with flexible partition, thereby enclosure interior is divided into two parts in housing: flexible partition top is inflatable chamber, and below is liquid storage cylinder; Housing upper end is provided with and charges and discharge gas port, charges and discharge gas port and is communicated with inflatable chamber, and housing lower end is provided with liquid outlet and liquid inlet, and liquid outlet and liquid inlet are communicated with liquid storage cylinder
Described valve is gasbag-type operated pneumatic valve, and the structure of gasbag-type operated pneumatic valve is: comprise valve body, form a cavity in valve body, cavity both sides are fluid passage, are provided with elastic bag in 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 by reversing solenoid valve.
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|---|---|---|---|
| CN201210261775.5A CN102749268B (en) | 2012-07-26 | 2012-07-26 | Full automatic multi-tube capillary viscometer |
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|---|---|---|---|
| CN201210261775.5A CN102749268B (en) | 2012-07-26 | 2012-07-26 | Full automatic multi-tube capillary viscometer |
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| CN102749268B true CN102749268B (en) | 2014-10-22 |
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Citations (2)
| 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 |
| CN202676569U (en) * | 2012-07-26 | 2013-01-16 | 山东大学 | Fully-automatic multi-capillary-tube viscometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06174626A (en) * | 1992-12-10 | 1994-06-24 | Nippon Mektron Ltd | Electrical viscosity fluid measuring device |
-
2012
- 2012-07-26 CN CN201210261775.5A patent/CN102749268B/en not_active Expired - Fee Related
Patent Citations (2)
| 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 |
| CN202676569U (en) * | 2012-07-26 | 2013-01-16 | 山东大学 | Fully-automatic multi-capillary-tube viscometer |
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| Title |
|---|
| JP特开平6-174626A 1994.06.24 |
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