CN107907446B - Full-automatic Ubbelohde viscometer and measurement method - Google Patents
Full-automatic Ubbelohde viscometer and measurement method Download PDFInfo
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- CN107907446B CN107907446B CN201710856292.2A CN201710856292A CN107907446B CN 107907446 B CN107907446 B CN 107907446B CN 201710856292 A CN201710856292 A CN 201710856292A CN 107907446 B CN107907446 B CN 107907446B
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- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/06—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by timing the outflow of a known quantity
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Abstract
The invention relates to the field of viscometers, and discloses a full-automatic Ubbelohde viscometer and a measuring method. The device comprises a mounting box (20) and an Ubbelohde viscometer arranged in the mounting box (20), wherein the Ubbelohde viscometer comprises a liquid pumping and discharging pipe (3) and a measuring pipe (2), a lower liquid storage ball (6) is connected below the liquid pumping and discharging pipe (3), a liquid inlet and outlet pipe (7) which is directly inserted into a sample bottle is communicated below the lower liquid storage ball (6), and the bottom of the measuring pipe (2) is communicated with the bottom of the lower liquid storage ball (6); one side of the measuring pipe (2) is connected with a vent pipe (1). The pipe orifice of the liquid pumping and discharging pipe (3) is connected with a liquid pumping device (30) and a liquid pushing device (31), the measuring pipe (2) is connected with a first switch device (32) for controlling the sealing of the pipe orifice, and the emptying pipe (1) is connected with a second switch device (33) for controlling the sealing of the pipe orifice. The device has the advantages of high automation degree, high liquid recovery rate, resource saving, convenient cleaning and the like.
Description
Technical Field
The invention relates to the field of viscometers, in particular to a full-automatic Ubbelohde viscometer and a measuring method.
Background
The Ubbelohde viscometer is mainly used for measuring the kinematic viscosity of liquid, is a gravity type capillary viscometer, and is used for measuring the kinematic viscosity of the liquid according to the flowing-out time of a certain volume of the liquid from a capillary under the driving of gravity, compared with other U-shaped gravity viscometers, the Ubbelohde viscometer has an additional emptying pipe and a suspension liquid column ball, and the suspension liquid column is formed during measurement so as not to be influenced by the liquid adding amount and the liquid level in the liquid storage ball, and the measurement precision is higher than that of other gravity viscometers (the manual measurement can reach 0.1 percent) and the Ubbelohde viscometer is widely applied. However, the three nozzles of the traditional Ubbelohde viscometer are all upward, and sample is added from the upper part and liquid is drained from the upper part. The waste liquid can pollute the whole area of three pipes when getting rid of to difficult to arrange completely, difficult sanitization still can spatter the human very unsafe, need consume a large amount of cleaning solvents during the washing, and have very high probability to wash unclean, cause the test inaccurate, be difficult to realize automatic application of sample and self-cleaning. Automated test instruments are extremely complex in construction and operation, require high corrosion resistance in materials, and are therefore very expensive. For a long time, fully automatic viscometers (including autosampler and autosurge) have been produced in only a few developed countries, and their market is monopolized by them, but with the rapid development of China, the demand is the highest worldwide. A large number of foreign exchanges flow to those developed countries. Some small and medium-sized enterprises generally cannot afford expensive full-automatic imported instruments, and the instruments are manually and semi-automatically operated, so that the enterprises are suffered from the toxicity of toxic organic solvent vapor and the complicated manual operation.
The invention patent of Chinese patent CN102809523A, entitled "a jacketed full-automatic Ubbelohde viscometer with bottom sample injection" adopts jacket design and has the advantage of bottom sample injection, but the method has the following defects that 1, the temperature influence is large when the temperature falls into a constant temperature environment each time is measured; 2. if the measurement is carried out in a lifting heat preservation mode, the measurement time is prolonged compared with the traditional measurement; 3. the structure is complex, so that the cleaning is unstable, sometimes the cleaning is difficult, and more reagents are wasted; 4. the upper expansion requires that residual liquid is remained in the container, and the container is detached and washed by liquid with higher corrosivity every week after use; 5. the automatic measurement has high failure rate and cannot meet the requirements of users; 6. temperature calibration is difficult.
Disclosure of Invention
Aiming at the defects of inconvenient cleaning, large measurement error, reagent waste and the like in the prior art, the invention provides a full-automatic Ubbelohde viscometer with convenient sample introduction, easy cleaning and accurate measurement, and also provides a measurement method.
In order to solve the technical problem, the invention is solved by the following technical scheme:
the utility model provides a full-automatic Ubbelohde viscometer, includes the mounting box and installs the Ubbelohde viscometer in the mounting box, and the Ubbelohde viscometer includes drainage tube and surveys the buret, surveys buret intercommunication and has the blow down pipe, and drainage tube below intercommunication has lower stock solution ball, and the below intercommunication of lower stock solution ball has the liquid inlet and outlet pipe that communicates the sample bottle, surveys the bottom of buret and the bottom intercommunication of lower stock solution ball. The liquid pumping and discharging tube firstly pumps liquid to enable the liquid pumping and discharging tube to enter the lower liquid storage ball, continuously pumps bubbles in the lower liquid storage ball which can be discharged, and simultaneously has the function of uniformly stirring the liquid. And in the liquid discharging process, the liquid in the lower liquid storage ball directly flows back to the sample bottle through the liquid inlet and outlet pipe. The whole process has no sample liquid loss and is stable. And the volume of sample can be controlled to stock solution ball down to it is controllable to guarantee to carry out experimental sample liquid volume, guarantees the accuracy of experimental data.
Preferably, the liquid inlet and outlet pipe is provided with a liquid inlet and outlet channel, and the liquid inlet and outlet channel is directly inserted into the sample bottle.
Preferably, the mounting box is a constant temperature box body, the measuring tube is sequentially connected with an upper liquid storage ball, a timing ball, a capillary tube and a suspension liquid column ball from top to bottom, and the suspension liquid column ball is communicated with the liquid inlet and outlet tube and the lower liquid storage ball; an upper timing scale is arranged between the upper liquid storage ball and the timing ball, and a lower timing scale is arranged below the timing ball; and sensors are arranged at the upper timing scale and the lower timing scale.
Preferably, the liquid pumping and discharging pipe is arranged on the right side of the measuring pipe, and the emptying pipe is arranged on the left side of the measuring pipe; the liquid inlet and outlet pipe is arranged below the measuring pipe and the liquid pumping and discharging pipe and is positioned between the measuring pipe and the liquid pumping and discharging pipe.
Preferably, a liquid blocking pipe is arranged in the liquid pumping and discharging pipe, the liquid blocking pipe is communicated with the liquid pumping and discharging pipe, and the liquid blocking pipe is positioned above the lower liquid storage ball. The liquid blocking pipe can retain liquid brought out by bubbles in the gas-liquid separation process in the lower liquid storage ball, so that the accuracy of the volume of a liquid sample is ensured.
Preferably, the pipe orifice of the liquid pumping and discharging pipe is connected with a liquid pumping device and a liquid pushing device, the measuring pipe is connected with a first switch device for controlling the sealing of the pipe orifice, and the emptying pipe is connected with a second switch device for controlling the sealing of the pipe orifice; the liquid pumping and discharging pipe is connected with a third switching device which controls the liquid pumping and discharging pipe to be communicated with the liquid pumping device and the liquid pushing device, and the liquid inlet and discharging pipe is connected with a fourth switching device which controls the liquid inlet and discharging pipe to be communicated with the sample bottle. The arrangement of a plurality of groups of switch devices is convenient for realizing automatic control, and a liquid pumping device and a liquid discharging device are adopted.
Preferably, the bottom of the liquid inlet and outlet pipe is provided with a liquid inlet component; the liquid inlet assembly comprises a liquid inlet and a liquid outlet, and the fourth switching device controls the communication of the liquid inlet and the liquid outlet. Make the whole viscosity tube not contact with the external world, avoided artificial damage and natural aging, the measurement accuracy of experiment is higher moreover, and the operation requirement is lower, and it is more convenient to control.
Preferably, the liquid outlet is provided with a jacket, the jacket comprises an upper clamping part and a bottom base, the opening area of the clamping part is gradually increased from top to inside, and the liquid inlet and outlet pipe is inserted into the clamping part from top to bottom.
Preferably, the jacket is made of rubber. Can conveniently seal liquid inlet and outlet pipe, dismantle the convenience moreover.
Preferably, the liquid pumping device is a vacuum pump, and the liquid pushing device is a booster pump. The vacuum pump and the booster pump can stably provide negative pressure and pressurization for the liquid pumping and discharging pipe.
Preferably, the automatic cleaning device further comprises a controller, the first switch device, the second switch device, the third switch device and the fourth switch device are connected with the controller through lines, the liquid pumping device and the liquid pushing device are connected with the controller through lines, and the controller is used for controlling the switches of the related valve bodies, so that the automatic treatment process integrating rinsing, measuring and cleaning can be realized.
The invention also provides a method for measuring the Ubbelohde viscometer, which comprises the following steps:
step one, turning off a first switch device and a second switch device, and turning on a third switch device, a fourth switch device and a liquid pumping device, wherein the liquid pumping device extracts liquid from a sample bottle and enters a lower liquid storage ball;
step two, closing the second switch device, the liquid pumping device and the fourth switch device, opening the first switch device and the liquid pushing device, and pushing liquid by the liquid pushing device to enter the measuring pipe for rinsing;
step three, after the rinsing is finished, closing the second switching device and the fourth switching device, and starting the liquid pumping device and the third switching device to enable the rinsing liquid in the measuring tube to quickly fall back to the lower liquid storage ball;
step four, closing the first switch device and the second switch device, opening the liquid pushing device, the third switch device and the fourth switch device, and pushing the rinse liquid into the sample bottle;
replacing the rinse solution sample bottle with a measurement sample bottle, and repeating the first step and the second step to push the required liquid into the measurement pipe;
step six, the liquid freely falls to the upper timing scale to start timing, the timing is stopped when the timing is finished, the liquid falls back to the lower liquid storage ball, the third switching device, the fourth switching device and the liquid pushing device are turned on, the first switching device and the second switching device are turned off at the same time, and the liquid pushing device pushes the liquid of the lower liquid storage ball into the sample bottle;
and step seven, repeating the step one, the step two and the step three to clean the liquid pumping and discharging pipe, the emptying pipe and the measuring pipe.
The method can realize full-process automatic operation without manual operation. The measuring accuracy is high, the liquid utilization rate is high, and the waste is low. And the cleaning is convenient, the experiment test solution and the rinse solution can be recovered without loss, the waste of the test solution is greatly reduced, and the resources and the cost are saved.
By adopting the technical scheme, the invention has the following beneficial effects:
1) the device can realize the automated processing integrating rinsing, measurement and cleaning, does not need manual operation, and has high measurement precision. And the cleaning is convenient, the experiment test solution and the rinse solution can be recovered without loss, the waste of the test solution is greatly reduced, and the resources and the cost are saved. The pressurization and the negative pressure are stable, so that the liquid inlet and outlet processes are stable. And the whole pipe orifice of the wu-shi tube does not leak, so that the operation is simpler and more convenient, and the service life of the wu-shi tube is longer.
2) Directly draw the sample from the sample bottle, be applicable to the measurement liquid of any temperature, the sample test is finished and is finally turned back to the stoste in, all at one no loss, and the stoste can be retrieved and sealed up and keep up because the stoste does not obscure with other liquid, therefore the stoste can carry out simple purification and recycle, can reduce the emission of a lot of chemicals, accomplishes environmental protection resources are saved.
2) The liquid pumping and discharging tube realizes automatic measurement, cleaning and drying through actions of pumping, discharging, closing and opening of other tube openings and the like. Particularly, the liquid pumping and discharging pipe can carry out positive and negative pressure treatment during rinsing and emptying so as to quickly realize rinsing and emptying.
3) The cleaning solution can be recycled for many times, the use limit is always used, the cleaning solution can be cleaned (about 12ML) only by using a small amount of the cleaning solution, and the cleaning solution is very environment-friendly.
4) The invention does not change the measurement principle of the Ubbelohde viscosity at all, and compared with the traditional viscometer, the measured data is more stable and has more consistent repeatability.
5) The invention is convenient to produce and implement, only needs to absorb the customized sample amount during sample injection, and does not worry about the damage of the sample transmitted to the valve and the pump mechanism. During cleaning, the cleaning solution with the amount more than that of the sample (1 ML more) is used for extraction, and air is absorbed to generate mixing motion after the extraction so as to clean all the polluted area.
6) The invention is not customized by screw, and has no special algorithm, and the measuring and cleaning liquid can not be lost. The automatic cleaning device is a viscometer with low energy consumption, and the cleaning liquid does not need to be contacted with a human body and cannot leak out safely.
7) The test solution has small pollution area to the tube wall, is more convenient to clean and is easy to realize automation.
Drawings
FIG. 1 is a schematic diagram of the structure of a viscosity tube;
fig. 2 is a partially enlarged view of fig. 1.
The names of the parts indicated by the numerical references in the drawings are as follows: 1 emptying pipe, 2 measuring pipes, 3 liquid pumping and discharging pipes, 4 liquid blocking pipes, 5 liquid filling marks, 6 lower liquid storage balls, 7 liquid inlet and discharging pipes, 8 suspension liquid column balls, 9 spherical covers, 10 capillary tubes, 11 timing balls, 12 upper liquid storage balls, MU lower timing scales and MO upper timing scales.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 and 2, the fully automatic ubbelohde viscometer comprises a mounting box 20 and the ubbelohde viscometer mounted in the mounting box 20, wherein the mounting box 20 is an incubator. The device comprises a drainage tube 3 and a measuring tube 2, wherein a lower liquid storage ball 6 is connected below the drainage tube 3, a liquid inlet and outlet tube 7 directly inserted into a sample bottle is communicated below the lower liquid storage ball 6, and the bottom of the measuring tube 2 is communicated with the bottom of the lower liquid storage ball 6; one side of the measuring tube 2 is connected with a blow-down pipe 1. To further explain the structure of the liquid inlet/outlet tube 7, the liquid inlet/outlet tube 7 is provided with an inlet/outlet port passage 71, and the inlet/outlet port passage 71 is directly inserted into the sample bottle.
The measuring tube 2 is connected with an upper liquid storage ball 12, a timing ball 11, a capillary tube 10 and a suspension liquid column ball 8 in sequence from top to bottom, the suspension liquid column ball 8 comprises a spherical cover 9, and the suspension liquid column ball 8 is communicated with a liquid inlet and outlet tube 7 and a lower liquid storage ball 6. One side of the measuring pipe 2 is connected with a vent pipe 1 which is communicated with a suspension liquid column ball 8 through the lower end of the vent pipe 1 and then communicated with the measuring pipe 2. An upper timing scale MO is arranged between the upper liquid storage ball 12 and the timing ball 11, and a lower timing scale MU is arranged below the timing ball 11; the liquid pumping and discharging pipe 3 is arranged on the right side of the measuring pipe 2, and the emptying pipe 1 is arranged on the left side of the measuring pipe 2; the liquid inlet and outlet pipe 7 is arranged below the measuring pipe 2 and the liquid discharge pipe 3 and is positioned between the measuring pipe 2 and the liquid discharge pipe 3; be provided with in the liquid drainage pipe 3 and keep off liquid pipe 4, keep off liquid pipe 4 and take out liquid pipe 3 and communicate with each other, keep off liquid pipe 4 and be located the top of stock solution ball 6 down, here keep off the structure of liquid pipe 4 and can overlap the nozzle stub in taking out liquid pipe 3, also can be the separation blade, as long as set up the opening in the middle part and can make its upside take out liquid pipe 3 and the 3 intercommunications of taking out liquid pipe of downside can. The lower liquid storage ball 6 is provided with a liquid filling mark 5, so that the liquid inlet amount can be accurately controlled. The inner bore radius of the capillary tube 10 is smaller than the inner bore radius of the upper section of the measuring tube 2. The sensors 80 are arranged on the upper timing scale MO and the lower timing scale MU.
Wherein, the pipe orifice of the liquid-extracting and discharging pipe 3 is connected with a liquid-extracting device 30 and a liquid-pushing device 31, the measuring pipe 2 is connected with a first switch device 32 for controlling the sealing of the pipe orifice, and the emptying pipe 1 is connected with a second switch device 33 for controlling the sealing of the pipe orifice; the liquid pumping and discharging tube 3 is connected with a third switching device 34 which controls the liquid pumping device 30 and the liquid pushing device 31 to be communicated; the bottom of the liquid inlet and outlet pipe 7 is connected with a liquid inlet component 21, and the liquid inlet component 21 is fixedly connected with the installation box 20 through bolts; the liquid inlet assembly 21 comprises a liquid inlet 22, a liquid outlet 23 and a fourth switching device 24 for controlling the liquid inlet 22 and the liquid outlet 23 to be communicated, the liquid outlet 23 is in flexible connection with the liquid inlet and outlet pipe 7, and the bottom of the liquid inlet 22 is connected with the sample bottle 14. The liquid outlet 23 is provided with a jacket 350, the jacket 350 includes an upper engaging portion 36 and a bottom base 37, the opening area of the engaging portion 36 is gradually increased from top to inside, and the liquid inlet and outlet pipe 7 is inserted into the engaging portion 36 from top to bottom. The jacket 350 is made of rubber, and other soft corrosion-resistant materials can be used instead. The middle part of the base 37 is provided with a through hole communicated with the liquid outlet 23, and the diameter of the through hole is the same as that of the upper end of the clamping part 36, so that the clamping sleeve 36 clamps and seals the liquid inlet and outlet pipe 7. In order to stabilize the device during the liquid suction and liquid discharge processes, the liquid suction device 30 is a vacuum pump, and the liquid pushing device 31 is a booster pump. The device also comprises a controller for realizing automation; the first switching device 32, the second switching device 33, the third switching device 34, and the fourth switching device 35 are electromagnetic switching valves, and are connected to a controller line, the drawing device 30 and the pushing device 31 are connected to the controller line, and the drawing device 30 and the pushing device 31 are connected to the controller line.
The measuring method of the device in the using process is as follows:
step one, the controller closes the measuring pipe 2 and the emptying pipe 1 by closing the first switch device 32 and the second switch device 33, opens the third switch device 34, the fourth switch device 35 and the liquid pumping device 30, and the liquid pumping device 30 extracts liquid from the sample bottle 14 and enters the lower liquid storage ball 6;
step two, the controller closes the second switch device 33, the liquid pumping device 30 and the fourth switch device 35, opens the first switch device 32 and the liquid pushing device 31, and the liquid pushing device 31 pushes liquid into the measuring pipe 2 for rinsing;
step three, after the rinse is finished, closing the second switching device 33 and the fourth switching device 35, and starting the liquid pumping device 30 and the third switching device 34 to enable the rinse liquid in the measuring pipe 2 to quickly fall back to the lower liquid storage ball 6;
step four, closing the first switch device 32 and the second switch device 33, opening the liquid pushing device 31, the third switch device 34 and the fourth switch device 35, and pushing the rinse liquid into the sample bottle 14 for recycling and sealing;
replacing the rinse solution sample bottle with a measurement sample bottle, and repeating the first step and the second step to push the sample solution of the lower liquid storage ball 6 to the upper liquid storage ball 12 to wait for measurement;
step six, controlling the second switch device 33, the first switch device 32 and the third switch device 34, so as to open the emptying pipe 1, the measuring pipe 2 and the drainage pipe 3, starting automatic timing by a sensor when the liquid level of the sample liquid freely falls through an upper measuring position MO, automatically stopping timing when the liquid level of the sample liquid passes through a lower measuring position MU, automatically calculating required data according to a related formula, enabling the liquid to fall back to the lower liquid storage ball 6, opening the third switch device 34, the fourth switch device 35 and the liquid pushing device 31, simultaneously closing the first switch device 32 and the second switch device 33, and pushing the liquid of the lower liquid storage ball 6 into the sample bottle 14 by the liquid pushing device 31;
and step seven, the first step, the second step and the third step are repeated to clean the liquid pumping and discharging pipe 3, the emptying pipe 1 and the measuring pipe 2.
Go on according to above-mentioned principle during the washing, can wash safely quiet need not to think intervention can the sanitization, only need the cleaning solution that adds to add slightly more add the sample liquid, select to exceed 1ml ~ 2ml can, wash the completion back, the washing liquid is whole to retrieve to former bottle in through advancing fluid-discharge tube 7, the process environmental protection does not have the hourglass, and the operation is very simple, convenient moreover to can recycle this viscometer, the usable chemical technology of sample of retrieving purifies the recycle.
Of course, the first switching device 32, the second switching device 33, the third switching device 34 and the fourth switching device 35 may be manually controlled switching valves according to actual production measurement requirements.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a full-automatic Ubbelohde viscometer, includes install bin (20) and installs the Ubbelohde viscometer in install bin (20), its characterized in that: the Ubbelohde viscometer comprises a liquid pumping and discharging pipe (3) and a measuring pipe (2), the measuring pipe (2) is communicated with an emptying pipe (1), a lower liquid storage ball (6) is communicated below the liquid pumping and discharging pipe (3), a liquid inlet and discharging pipe (7) communicated with a sample bottle is communicated below the lower liquid storage ball (6), and the bottom of the measuring pipe (2) is communicated with the bottom of the lower liquid storage ball (6); the liquid inlet and outlet pipe (7) is provided with a liquid inlet and outlet channel (71), and the liquid inlet and outlet channel (71) is directly inserted into the sample bottle; the mounting box (20) is a constant temperature box body, the measuring tube (2) is sequentially connected with an upper liquid storage ball (12), a timing ball (11), a capillary tube (10) and a suspension liquid column ball (8) from top to bottom, and the suspension liquid column ball (8) is communicated with a liquid inlet and outlet pipe (7) and a lower liquid storage ball (6); an upper timing scale is arranged between the upper liquid storage ball (12) and the timing ball (11), and a lower timing scale is arranged below the timing ball (11); sensors (80) are arranged at the upper timing scale and the lower timing scale; the liquid pumping and discharging pipe (3) is arranged on the right side of the measuring pipe (2), and the emptying pipe (1) is arranged on the left side of the measuring pipe (2); the liquid inlet and outlet pipe (7) is arranged below the measuring pipe (2) and the liquid pumping and discharging pipe (3) and is positioned between the measuring pipe (2) and the liquid pumping and discharging pipe (3); a liquid blocking pipe (4) is arranged in the liquid pumping and discharging pipe (3), the liquid blocking pipe (4) is communicated with the liquid pumping and discharging pipe (3), and the liquid blocking pipe (4) is positioned above the lower liquid storage ball (6).
2. The full-automatic Ubbelohde viscometer of claim 1, wherein: the pipe orifice of the liquid pumping and discharging pipe (3) is connected with a liquid pumping device (30) and a liquid pushing device (31), the measuring pipe (2) is connected with a first switch device (32) for controlling the sealing of the pipe orifice, and the emptying pipe (1) is connected with a second switch device (33) for controlling the sealing of the pipe orifice; the liquid pumping and discharging pipe (3) is connected with a third switching device (34) which controls the liquid pumping device (30) and the liquid pushing device (31) to be communicated, and the liquid inlet and discharging pipe (7) is connected with a fourth switching device (35) which controls the liquid inlet and discharging pipe (7) to be communicated with the sample bottle.
3. The full-automatic Ubbelohde viscometer of claim 2, wherein: a liquid inlet component (21) is arranged at the bottom of the liquid inlet and outlet pipe (7); the liquid inlet assembly (21) comprises a liquid inlet (22) and a liquid outlet (23), and the fourth switching device (35) controls the communication of the liquid inlet (22) and the liquid outlet (23).
4. The full-automatic Ubbelohde viscometer of claim 3, characterized in that: the liquid outlet (23) is provided with a jacket (350), the jacket (350) comprises an upper clamping part (36) and a bottom base (37), the opening area of the clamping part (36) is gradually increased from top to inside, and the liquid inlet and outlet pipe (7) is inserted into the clamping part (36) from top to bottom.
5. A full automatic Ubbelohde viscometer according to claim 2 or 3 or 4, characterized in that: the device also comprises a controller; the first switch device (32), the second switch device (33), the third switch device (34) and the fourth switch device (35) are electromagnetic switch valves and are connected with a controller line, and the liquid pumping device (30) and the liquid pushing device (31) are connected with the controller line; the liquid pumping device (30) is a vacuum pump, and the liquid pushing device (31) is a booster pump.
6. A measuring method for the full-automatic ubbelohde viscometer of claim 5, characterized in that: the method comprises the following steps:
step one, turning off a first switch device (32) and a second switch device (33), turning on a third switch device (34), a fourth switch device (35) and a liquid extracting device (30), wherein the liquid extracting device (30) extracts liquid from a sample bottle (14) and enters a lower liquid storage ball (6);
step two, closing the second switch device (33), the liquid pumping device (30) and the fourth switch device (35), opening the first switch device (32) and the liquid pushing device (31), and pushing liquid into the measuring pipe (2) by the liquid pushing device (31) for rinsing;
step three, after the rinsing is finished, closing the second switch device (33) and the fourth switch device (35), and starting the liquid pumping device (30) and the third switch device (34) to enable the rinsing liquid in the measuring pipe (2) to quickly fall back to the lower liquid storage ball (6);
step four, closing the first switch device (32) and the second switch device (33), opening the liquid pushing device (31), the third switch device (34) and the fourth switch device (35), and pushing the rinsing liquid into the sample bottle (14);
replacing the rinsing liquid sample bottle with a measuring sample bottle, and repeating the first step and the second step to push the required liquid into the measuring tube (2);
step six, the liquid freely falls to an upper timing scale to start timing, the timing is stopped when the timing is finished, the liquid falls back to a lower liquid storage ball (6), a third switching device (34), a fourth switching device (35) and a liquid pushing device (31) are opened, a first switching device (32) and a second switching device (33) are closed at the same time, and the liquid pushing device (31) pushes the liquid of the lower liquid storage ball (6) into a sample bottle (14);
and step seven, the liquid pumping and discharging pipe (3), the emptying pipe (1) and the measuring pipe (2) are cleaned by repeating the step one, the step two and the step three.
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| CN201710856292.2A CN107907446B (en) | 2017-09-21 | 2017-09-21 | Full-automatic Ubbelohde viscometer and measurement method |
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| CN201710856292.2A CN107907446B (en) | 2017-09-21 | 2017-09-21 | Full-automatic Ubbelohde viscometer and measurement method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809523A (en) * | 2012-08-15 | 2012-12-05 | 杭州中旺科技有限公司 | Full-automatic jacket-type ubbelohde viscometer injecting samples from bottom |
| CN204330525U (en) * | 2014-12-25 | 2015-05-13 | 郑州正佳能源环保科技有限公司 | Multifunctional fur capillary viscometer |
| CN206161470U (en) * | 2016-11-04 | 2017-05-10 | 武汉华科大生命科技有限公司 | A viscosity detection device for polysaccharide digest |
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2017
- 2017-09-21 CN CN201710856292.2A patent/CN107907446B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809523A (en) * | 2012-08-15 | 2012-12-05 | 杭州中旺科技有限公司 | Full-automatic jacket-type ubbelohde viscometer injecting samples from bottom |
| CN204330525U (en) * | 2014-12-25 | 2015-05-13 | 郑州正佳能源环保科技有限公司 | Multifunctional fur capillary viscometer |
| CN206161470U (en) * | 2016-11-04 | 2017-05-10 | 武汉华科大生命科技有限公司 | A viscosity detection device for polysaccharide digest |
Non-Patent Citations (1)
| Title |
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| PTA相关体系常压及高压下密度和粘度的测定;周清;《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅰ辑》;20041215(第04期);第21页3.4.2节 * |
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