CN112834387A - Constant value device and method for low-temperature viscosity liquid - Google Patents
Constant value device and method for low-temperature viscosity liquid Download PDFInfo
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- CN112834387A CN112834387A CN202110241867.6A CN202110241867A CN112834387A CN 112834387 A CN112834387 A CN 112834387A CN 202110241867 A CN202110241867 A CN 202110241867A CN 112834387 A CN112834387 A CN 112834387A
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Abstract
The invention relates to the technical field of low-temperature viscosity liquid constant value, and discloses a constant value device and method for low-temperature viscosity liquid. The suspension ball and the liquid storage ball of the standard capillary viscometer are on the same straight line, the main pipe extends into the liquid storage ball, and inert gas can be introduced to evacuate air in the liquid storage ball, so that the standard capillary viscometer is wholly in an inert atmosphere and pollution is avoided.
Description
Technical Field
The invention relates to the technical field of low-temperature viscosity liquid constant value, in particular to a constant value device and method for low-temperature viscosity liquid.
Background
In the quantity value transmission system for measuring the viscosity, a viscometer and a viscosity liquid are alternately transmitted until the viscosity value of a sample is measured, and the viscosity liquid has the effect of starting and stopping in the process of transmitting the viscosity quantity value.
The low-temperature viscosity is mainly measured by a rotation method and a capillary method. Among them, the capillary viscometer is known as an absolute viscometer as the highest precision method in viscosity measurement, and in a quantity transmission system diagram of viscosity measurement, national standards and national standards of viscosity are all ukulele capillary viscometers, and the advantage of high precision of the capillary viscometer makes it not only an important means for sample viscosity measurement, but also plays a significant role in quantity transmission. The standard capillary viscometer has larger volume and higher precision than a working capillary viscometer, when the standard capillary viscometer is used for viscosity liquid setting in a conventional environment, the viscosity liquid needs to be filled in the standard capillary viscometer to carry out constant temperature on the whole standard capillary viscometer, the constant temperature equipment is a large-size transparent glass constant temperature bath tank, the observation and the timing of human eyes are convenient, the temperature precision is +/-0.01 ℃, and the precision of the viscosity liquid with the set value is better than 0.8%.
Because the low-temperature viscosity measuring range is generally as low as-40 ℃, the service temperature of the aviation hydraulic oil is more as low as-70 ℃, the transparent glass constant-temperature bath tank in the conventional environment is difficult to bear the low temperature, and meanwhile, most of the viscosity liquid is oil products, the viscosity value of the viscosity liquid is greatly influenced by the temperature, and particularly, the viscosity value at the low temperature is greatly changed along with the temperature. This type of technique is not suitable for low temperature viscosity fluid sizing.
The fixed value of the existing low-temperature viscosity liquid is usually completed by adopting a rotary viscometer or a working capillary viscometer, because the measuring head part and the rotor part of the former are independent, the rotor part is only required to be precisely constant in temperature during measurement, the state of the measured fluid is not required to be observed, and the latter can realize constant temperature by adopting a special double-layer glass constant-temperature bath and simultaneously meet the observation of human eyes. However, the self-precision of the equipment is more than 0.8 percent, and the precision of the fixed-value viscosity liquid is lower. The measurement precision of the rotation method principle is inferior to that of the capillary method, and the method is used for the development and the development of precise measurement and is limited; standard capillary viscometers are too large in size and only use double-glazing technology, with limited precision at constant temperature. The design size and temperature control precision of the conventional low-temperature capillary viscometer device are difficult to apply to a standard capillary viscometer, and the design size and the temperature control precision limit the fixed value of low-temperature viscosity liquid.
The introduction of uncertainty in the process of capillary viscometer valuing is mainly due to: the precision, temperature control fluctuation degree, viscosity liquid uniformity, verticality and timing of the capillary viscometer are selected. Therefore, the implementation of the viscosity liquid fixed by the standard capillary viscometer is beneficial to greatly improving the fixed value precision of the viscosity liquid. The use of the low-temperature constant-temperature equipment for setting the value of the standard capillary viscometer meets the requirements of large size with the depth of a working area not less than 80cm, the temperature control precision of +/-0.002 ℃, the convenience for observation and timing and the convenience for maintaining the verticality of the standard capillary viscometer during working.
In addition, under the low temperature condition, when the atmospheric environment humidity is relatively high, the viscometer can frost and fog around the supercooling wall surface exposed in the environment, so that the pollution of the fluid to be measured is brought, errors can be introduced in the process of value determination and measurement, and if a large amount of frost is formed at the contact position of the pipe orifice of the conventional low-temperature capillary method viscometer device and the liquid level of a refrigeration medium, the accuracy of the value determination of the low-temperature viscosity fluid is limited.
In the calibration process of the low-temperature viscometer, the uncertainty caused by the inaccuracy of the low-temperature viscosity liquid fixed value result is not favorable for unifying the values, and the difficulty of accurately fixing the value of the low-temperature viscosity liquid becomes an important bottleneck for restricting the measurement and transmission of the low-temperature viscosity.
Based on the above, a constant value device and method for low-temperature viscosity fluid are provided, and hopes are provided for solving the defects in the prior art.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the constant value device and the method for the low-temperature viscosity liquid, and the constant value device and the method have the advantages of capability of setting the value of the viscosity liquid at low temperature, high constant value precision, good temperature control effect and prevention of low-temperature pollution of the viscosity liquid to be measured.
(II) technical scheme
In order to realize the purposes of setting the value of the viscosity fluid at low temperature, high precision of the setting value, good temperature control effect and prevention of low-temperature pollution of the viscosity fluid to be measured, the invention provides the following technical scheme: a constant value device for low-temperature viscosity liquid comprises a shell, wherein a groove body is formed in the shell, a baffle is fixedly installed on the inner wall of the groove body, a standard capillary viscometer is arranged on the left side of the baffle, and a stirring device, a heating device and a refrigerating device are arranged on the right side of the baffle;
the standard capillary viscometer is characterized in that a disc part is inserted at the top of the standard capillary viscometer, an external thread is arranged on the outer wall of the disc part, a positioning frame is connected to the outer wall of the external thread in a threaded manner, and the positioning frame is fixedly installed at the top of the lifting table.
As a preferred technical scheme of the invention, the stirring device comprises a motor and a stirring rod, the motor is fixedly arranged at the top of the shell, the stirring rod is fixedly arranged at the top of an output shaft of the motor, and the outer wall of the stirring rod is also fixedly provided with a stirring blade;
the heating device is an electric heating pipe and is arranged on the upper half portion of the stirring rod in a surrounding mode, and the refrigerating device is a refrigerating pipe and is arranged on the lower half portion of the stirring rod in a surrounding mode.
As a preferred technical scheme of the present invention, the standard capillary viscometer includes a main tube, a first branch tube and a second branch tube arranged in parallel in the same plane, wherein a liquid level ball, a timing ball and a suspension ball are sequentially arranged in the main tube from top to bottom, an upper scale mark is arranged on the top of the timing ball, a lower scale mark is arranged on the bottom of the timing ball, a capillary tube is arranged between the timing ball and the suspension ball, the bottom end of the second branch tube is communicated with the suspension ball, a liquid inlet tube is fixedly mounted on the bottom of the main tube, the liquid inlet tube is inserted into the liquid storage ball, and the liquid storage ball is communicated with the bottom end of the first branch tube.
As a preferred technical scheme of the invention, the outer wall of the shell is also provided with an observation window, and the position of the observation window corresponds to the position of the timing ball;
the observation window is of a multi-layer glass structure, and defrosting and drying technologies are adopted among the multi-layer glass.
As a preferred technical scheme of the present invention, a U-shaped frame is fixedly mounted at the bottom of the disc member, a first fixing clip and a second fixing clip are movably disposed on the outer wall of the U-shaped frame, a first branch pipe is movably connected to the inner wall of the first fixing clip, a lamp source is fixedly mounted at the end of the second fixing clip, and the mounting position of the lamp source corresponds to the position of the timing ball.
As a preferred technical scheme of the invention, the positioning frame comprises a connecting sleeve, a sealing ring and a connecting rod, the disc part is in threaded connection with the inner wall of the connecting sleeve, a sealing cover is fixedly arranged at the top of the disc part, the sealing ring is movably arranged on the outer wall of the connecting sleeve, and the sealing ring is fixedly arranged on the inner top wall of the shell;
the outer wall of the connecting sleeve is also fixedly provided with a connecting rod, the outer wall of the tail end of the connecting rod is provided with a movable groove, and the inner wall of the movable groove is movably provided with a positioning bolt;
the elevating platform comprises a bottom barrel and an electric push rod, the electric push rod is arranged inside the bottom barrel, a lifting rod is fixedly mounted at the top of an output shaft of the electric push rod, and a positioning bolt is connected to the top of the lifting rod in a threaded mode and used for fixedly mounting a connecting rod at the top of the lifting rod.
As a preferred technical scheme of the invention, a first air pipe and a second air pipe are oppositely and fixedly arranged on the outer wall of the sealing cover;
a first through pipe and a second through pipe are fixedly arranged adjacent to the outer wall of the sealing cover, the bottom ends of the first through pipe and the second through pipe are respectively in soft connection with the top ends of the second branch pipe and the main pipe (201), and a first electromagnetic valve and a second electromagnetic valve are respectively arranged in the first through pipe and the second through pipe;
a first inert gas source is arranged at the tail end of the first gas pipe, a second inert gas source is arranged at the tail end of the first through pipe, and a vacuum pump is arranged at the tail end of the second through pipe;
the input end electric connection of first inert gas source and second inert gas source has the inert gas controller, the input electric connection of vacuum pump has the evacuating device controller.
A method for valuing a low-temperature viscosity fluid is used for a valuing device for the low-temperature viscosity fluid, and comprises the following steps:
s01, installation: vertically installing a cleaned standard capillary viscometer on a U-shaped frame, checking the position of the standard capillary viscometer on the U-shaped frame, considering the position of the standard capillary viscometer to be vertical when a capillary pipe on a main pipe is parallel to the U-shaped frame, connecting a lifting table, a positioning frame and the U-shaped frame, adjusting the relative position of the lifting table, the positioning frame and the U-shaped frame, and installing a thermometer at the center of a disc piece;
s02, liquid filling: adding a liquid with an undetermined viscosity value into a liquid storage ball from the orifice of the first branch pipe by using an injector;
s03, sealing: the first air pipe is connected with a first inert gas source, the second air pipe is connected with the atmosphere, the first through pipe is in flexible connection with the second branch pipe, the second through pipe is in flexible connection with the main pipe, the outer part of the first through pipe is connected with the second inert gas source through a first electromagnetic valve, and the second through pipe is connected with the vacuum pump through a second electromagnetic valve;
s04, inert atmosphere: opening a first electromagnetic valve and a second electromagnetic valve, opening a second inert gas source, enabling inert gas to enter a second branch pipe, enabling the inert gas to flow out of a main pipe through the second electromagnetic valve firstly, discharging air in the main pipe, closing the second electromagnetic valve to seal the main pipe after a period of time, continuing to introduce the inert gas, enabling the inert gas to enter the first branch pipe through a liquid inlet pipe, discharging the air in the first branch pipe, opening the first inert gas source, gradually discharging the air in a sealing cover, cutting off the second inert gas source at the moment, closing the first electromagnetic valve, and enabling the whole standard capillary viscometer to be in an inert atmosphere after a period of time;
s05, constant temperature: setting a target temperature of the tank body, adjusting the temperature to a constant value based on a measurement result of a thermometer, and keeping the temperature for more than 20min until the temperature is uniform;
s06, measurement: closing the first electromagnetic valve to seal the second branch pipe, opening the second electromagnetic valve, opening the vacuum pump to provide negative pressure for the main pipe, slowly sucking the liquid to be measured into the timing ball from the liquid storage ball, opening the lamp source, observing through the observation window, and cutting off the vacuum pump when the liquid reaches the liquid level ball;
then, opening the first electromagnetic valve to enable the second branch pipe to be communicated with the atmosphere, and at the moment, rapidly refluxing the viscous liquid in the suspension ball to the liquid storage ball; the viscous liquid in the timing ball slowly flows down along the capillary tube under the action of gravity; observing through an observation window, recording the time difference of the upper liquid level of the fluid flowing through an upper scale mark and a lower scale mark by using timing equipment, repeating the experiment for six times to obtain the average time, combining with a standard capillary viscometer constant, obtaining the kinematic viscosity value of the viscosity fluid to be measured by the formula upsilon C Δ t, and further combining with a density measurement result, obtaining the kinematic viscosity value of the viscosity fluid to be measured by the formula eta rho upsilon.
(III) advantageous effects
Compared with the prior art, the invention provides a constant value device and method for low-temperature viscosity fluid, which have the following beneficial effects:
1. according to the constant value device and method for the low-temperature viscosity liquid, a suspension ball and a liquid storage ball of a standard capillary viscometer are on the same straight line, a main pipe extends into the liquid storage ball, inert gas can be introduced to exhaust air in the standard capillary viscometer, the whole standard capillary viscometer is in an inert atmosphere, pollution is avoided, meanwhile, the constant temperature equipment is a groove body which is hermetically arranged in a shell, the size of the standard capillary viscometer is suitable, the constant temperature precision of +/-0.002 ℃ is met, an observation window is arranged on the groove body, observation timing is achieved, and therefore accurate constant value of the low-temperature viscosity liquid is achieved.
2. According to the valuing device and method for the low-temperature viscosity liquid, the observation window is of a multi-layer glass assembly structure, and the defrosting and drying technology is adopted between glass layers, so that the condition that fog is condensed on the glass layers under the low-temperature working condition is avoided, and normal observation is not influenced.
3. The constant value device and the constant value method for the low-temperature viscosity liquid adopt a standard capillary viscometer, and the precision is improved compared with a rotary method viscometer and a working capillary viscometer.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the overall structure of the present invention;
FIG. 3 is an enlarged schematic view of a standard capillary viscometer of the present invention;
FIG. 4 is a side sectional view of the integrated structure of the present invention;
FIG. 5 is an enlarged view of a portion of the U-shaped frame of the present invention;
FIG. 6 is a top view of the present invention;
FIG. 7 is a schematic view of a portion of the seal housing of the present invention.
In the figure: 1. a housing; 2. a standard capillary viscometer; 201. a main pipe; 202. a first branch pipe; 203. a second branch pipe; 204. a liquid level ball; 205. a timing ball; 206. scale lines are arranged; 207. lower scale marks; 208. a capillary tube member; 209. suspension spheres; 210. a liquid inlet pipe; 211. a liquid storage ball; 3. a U-shaped frame; 4. a positioning frame; 401. connecting sleeves; 402. a seal ring; 403. a connecting rod; 404. a movable groove; 405. positioning the bolt; 5. a sealing cover; 501. a first air pipe; 502. a second air pipe; 503. a first through pipe; 504. a second pipe; 505. a first solenoid valve; 506. a second solenoid valve; 507. a first inert gas source; 508. a second inert gas source; 509. a vacuum pump; 6. a lifting platform; 601. a bottom cylinder; 602. an electric push rod; 603. a lifting rod; 7. an observation window; 8. a trough body; 9. a stirring device; 10. a heating device; 11. a refrigeration device; 12. a baffle plate; 13. a disc member; 14. an external thread; 15. a light source; 16. a first fixing clip; 17. a second fixing clip; 18. an inert gas controller; 19. a vacuum extractor controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-7, a constant value device for low-temperature viscosity liquid comprises a housing 1, a tank 8 is formed inside the housing 1, a baffle 12 is fixedly installed on the inner wall of the tank 8, a standard capillary viscometer 2 is arranged on the left side of the baffle 12, and a stirring device 9, a heating device 10 and a refrigerating device 11 are arranged on the right side of the baffle 12;
the top of standard capillary viscometer 2 is pegged graft and is had disc spare 13, and disc spare 13's outer wall has seted up external screw thread 14, and the outer wall threaded connection of external screw thread 14 has locating rack 4, and locating rack 4 fixed mounting is at the top of elevating platform 6.
In this embodiment, the stirring device 9 includes a motor and a stirring rod, the motor is fixedly installed at the top of the housing 1, the stirring rod is fixedly installed at the top of an output shaft of the motor, and the outer wall of the stirring rod is also fixedly provided with stirring blades;
the heating device 10 is an electric heating tube and is arranged around the upper half part of the stirring rod, and the refrigerating device 11 is a refrigerating tube and is arranged around the lower half part of the stirring rod.
In this embodiment, the suspension ball 209 and the liquid storage ball 211 of the standard capillary viscometer 2 are located on the main tube 201, and the main tube 201 extends to the inside of the liquid storage ball 211, and the liquid storage ball 211 of the conventional standard capillary viscometer 2 is located right below the bottom of the first branch tube 202 and directly communicated with the suspension ball 209. The standard capillary viscometer 2 in the embodiment can realize the purpose of introducing inert gas to empty the air in the standard capillary viscometer so that the whole standard capillary viscometer is in an inert atmosphere and the pollution is avoided;
the standard capillary viscometer 2 comprises a main pipe 201, a first branch pipe 202 and a second branch pipe 203 which are arranged in parallel in the same plane, the main pipe 201, the first branch pipe 202 and the second branch pipe 203 of the traditional standard capillary viscometer 2 are not arranged in the same plane and are distributed in a triangular manner, the main pipe 201, the first branch pipe 202 and the second branch pipe 203 are arranged in parallel in the same plane in the embodiment, which is beneficial to observing and timing through an observation window 7, and compared with the traditional standard capillary viscometer 2, the upper and lower timing scale lines of the main pipe 201 are prevented from being shielded;
compared with the traditional standard capillary viscometer 2, the standard capillary viscometer 2 in the embodiment has no quantitative requirement on the sample addition amount of the fluid to be measured, the basic characteristics of the main pipe 201 of the traditional standard capillary viscometer 2 are reserved, the effectiveness and the standard device level precision are ensured in principle, and a good effect can be achieved;
the liquid level ball 204, the timing ball 205 and the suspension ball 209 are sequentially arranged in the main pipe 201 from top to bottom, the top of the timing ball 205 is provided with an upper scale mark 206, the bottom of the timing ball 205 is provided with a lower scale mark 207, a capillary tube 208 is arranged between the timing ball 205 and the suspension ball 209, the bottom end of the second branch pipe 203 is communicated with the suspension ball 209, the bottom of the main pipe 201 is also fixedly provided with a liquid inlet pipe 210, the liquid inlet pipe 210 is inserted in the liquid storage ball 211, and the liquid storage ball 211 is communicated with the bottom end of the first branch pipe 202.
In this embodiment, the outer wall of the housing 1 is further provided with an observation window 7, and the position of the observation window 7 corresponds to the position of the timing ball 205;
the observation window 7 is of a multi-layer glass structure, and a defrosting and drying technology is adopted among the multi-layer glass, so that the condition that fog is condensed on a glass layer under a low-temperature working condition is avoided, and normal observation is not influenced.
In this embodiment, the bottom of the circular disc member 13 is fixedly provided with a U-shaped frame 3, the outer wall of the U-shaped frame 3 is movably provided with a first fixing clip 16 and a second fixing clip 17, the inner wall of the first fixing clip 16 is movably connected with a first branch pipe 202, the tail end of the second fixing clip 17 is fixedly provided with a lamp source 15, and the installation position of the lamp source 15 corresponds to the position of the timing ball 205.
In this embodiment, the positioning frame 4 includes a connecting sleeve 401, a sealing ring 402 and a connecting rod 403, the disc member 13 is screwed on the inner wall of the connecting sleeve 401, the top of the disc member 13 is fixedly provided with a sealing cover 5, the outer wall of the connecting sleeve 401 is movably provided with the sealing ring 402, and the sealing ring 402 is fixedly installed on the inner top wall of the housing 1;
the outer wall of the connecting sleeve 401 is also fixedly provided with a connecting rod 403, the outer wall of the tail end of the connecting rod 403 is provided with a movable groove 404, and the inner wall of the movable groove 404 is movably provided with a positioning bolt 405;
the lifting platform 6 comprises a bottom cylinder 601 and an electric push rod 602, the electric push rod 602 is arranged inside the bottom cylinder 601, a lifting rod 603 is fixedly installed at the top of an output shaft of the electric push rod 602, and a positioning bolt 405 is in threaded connection with the top of the lifting rod 603 and is used for fixedly installing a connecting rod 403 at the top of the lifting rod 603;
the elevating platform 6 controls the standard capillary viscometer 2 to ascend and descend, the target position of the slow groove body 8 supports the positioning frame 4, so that the measuring part is not in contact with the constant temperature part, and the influence of vibration on measurement is avoided.
In this embodiment, a first air pipe 501 and a second air pipe 502 are oppositely and fixedly installed on the outer wall of the sealing cover 5;
a first through pipe 503 and a second through pipe 504 are fixedly mounted adjacent to the outer wall of the sealing cover 5, the bottom ends of the first through pipe 503 and the second through pipe 504 are respectively in soft connection with the top ends of the second branch pipe 203 and the main pipe 201, and a first electromagnetic valve 505 and a second electromagnetic valve 506 are respectively arranged inside the first through pipe 503 and the second through pipe 504;
a first inert gas source 507 is arranged at the tail end of the first gas pipe 501, a second inert gas source 508 is arranged at the tail end of the first through pipe 503, and a vacuum pump 509 is arranged at the tail end of the second through pipe 504;
the input ends of the first inert gas source 507 and the second inert gas source 508 are electrically connected with an inert gas controller 18, and the input end of the vacuum pump 509 is electrically connected with a vacuum pumping device controller 19.
A method for valuing a low-temperature viscosity fluid is used for a valuing device for the low-temperature viscosity fluid, and comprises the following steps:
step one, installation: vertically installing a cleaned standard capillary viscometer 2 on a U-shaped frame 3, checking the position of the standard capillary viscometer 2 on the U-shaped frame 3, considering the position of the standard capillary viscometer 2 to be vertical when a capillary pipe member 208 on a main pipe 201 is parallel to the U-shaped frame 3, connecting a lifting table 6, a positioning frame 4 and the U-shaped frame 3, adjusting the relative position of the lifting table, the positioning frame and a groove body 8, and installing a thermometer at the center of a disc member 13;
step two, liquid filling: adding a liquid with a certain viscosity value to the liquid storage ball 211 from the orifice of the first branch pipe 202 by using a syringe;
step three, sealing: a first air pipe 501 is connected with a first inert gas source 507, a second air pipe 502 is connected with the atmosphere, a first through pipe 503 is in soft connection with a second branch pipe 203, a second through pipe 504 is in soft connection with a main pipe 201, the outside of the first through pipe 503 is connected with a second inert gas source 508 through a first electromagnetic valve 505, and the second through pipe 504 is connected with a vacuum pump 509 through a second electromagnetic valve 506;
step four, inert atmosphere: opening a first electromagnetic valve 505 and a second electromagnetic valve 506, opening a second inert gas source 508, enabling inert gas to enter a second branch pipe 203, enabling the inert gas to flow out of the main pipe 201 through the second electromagnetic valve 506 firstly, discharging air in the main pipe 201, closing the second electromagnetic valve 506 to seal the main pipe 201 after a period of time, continuing to introduce the inert gas, enabling the inert gas to enter the first branch pipe 202 from the liquid inlet pipe 210, discharging the air in the first branch pipe 202, opening the first inert gas source 507, gradually discharging the air in the seal cover 5, cutting off the second inert gas source 508 at the moment, closing the first electromagnetic valve 505, and enabling the whole standard capillary 2 to be in an inert atmosphere after a period of time;
step five, constant temperature: setting the target temperature of the tank body 8, adjusting the temperature to a constant value based on the measurement result of the thermometer, and keeping the temperature for more than 20min until the temperature is uniform;
step six, measurement: closing the first electromagnetic valve 505 to seal the second branch pipe 203, opening the second electromagnetic valve 506, and opening the vacuum pump 509 to provide negative pressure to the main pipe 201, slowly sucking the viscosity liquid to be measured from the liquid storage ball 211 into the timing ball 205, opening the lamp source 15, observing through the observation window 7, and cutting off the vacuum pump 509 when the viscosity liquid reaches the liquid level ball 204;
then, the first electromagnetic valve 505 is opened to connect the second branch pipe 203 to the atmosphere, and the viscous liquid in the suspension ball 209 flows back to the liquid storage ball 211 rapidly; the viscous liquid in the timing ball 205 slowly flows down along the capillary tube 208 under the action of gravity; observing through the observation window 7, recording the time difference of the upper liquid level of the fluid flowing through the upper scale mark 206 and the lower scale mark 207 by using timing equipment, repeating the experiment for six times to obtain the average time, obtaining the kinematic viscosity value of the viscosity fluid to be measured by combining a standard capillary viscometer 2 constant and a formula upsilon ═ C · Δ t, and further obtaining the kinematic viscosity value of the viscosity fluid to be measured by combining a density measurement result and a formula η ═ ρ · upsilon.
The working principle and the using process of the invention are as follows:
installation: vertically installing a cleaned standard capillary viscometer 2 on a U-shaped frame 3, checking the position of the standard capillary viscometer 2 on the U-shaped frame 3, considering the position of the standard capillary viscometer 2 to be vertical when a capillary pipe member 208 on a main pipe 201 is parallel to the U-shaped frame 3, connecting a lifting table 6, a positioning frame 4 and the U-shaped frame 3, adjusting the relative position of the lifting table, the positioning frame and a groove body 8, and installing a thermometer at the center of a disc member 13;
liquid filling: adding a liquid with a certain viscosity value to the liquid storage ball 211 from the orifice of the first branch pipe 202 by using a syringe;
sealing: a first air pipe 501 is connected with a first inert gas source 507, a second air pipe 502 is connected with the atmosphere, a first through pipe 503 is in soft connection with a second branch pipe 203, a second through pipe 504 is in soft connection with a main pipe 201, the outside of the first through pipe 503 is connected with a second inert gas source 508 through a first electromagnetic valve 505, and the second through pipe 504 is connected with a vacuum pump 509 through a second electromagnetic valve 506;
inert atmosphere: opening a first electromagnetic valve 505 and a second electromagnetic valve 506, opening a second inert gas source 508, enabling inert gas to enter a second branch pipe 203, enabling the inert gas to flow out of the main pipe 201 through the second electromagnetic valve 506 firstly, discharging air in the main pipe 201, closing the second electromagnetic valve 506 to seal the main pipe 201 after a period of time, continuing to introduce the inert gas, enabling the inert gas to enter the first branch pipe 202 from the liquid inlet pipe 210, discharging the air in the first branch pipe 202, opening the first inert gas source 507, gradually discharging the air in the seal cover 5, cutting off the second inert gas source 508 at the moment, closing the first electromagnetic valve 505, and enabling the whole standard capillary 2 to be in an inert atmosphere after a period of time;
and (3) constant temperature: setting the target temperature of the tank body 8, adjusting the temperature to a constant value based on the measurement result of the thermometer, and keeping the temperature for more than 20min until the temperature is uniform;
measurement: closing the first electromagnetic valve 505 to seal the second branch pipe 203, opening the second electromagnetic valve 506, and opening the vacuum pump 509 to provide negative pressure to the main pipe 201, slowly sucking the viscosity liquid to be measured from the liquid storage ball 211 into the timing ball 205, opening the lamp source 15, observing through the observation window 7, and cutting off the vacuum pump 509 when the viscosity liquid reaches the liquid level ball 204;
then, the first electromagnetic valve 505 is opened to connect the second branch pipe 203 to the atmosphere, and the viscous liquid in the suspension ball 209 flows back to the liquid storage ball 211 rapidly; the viscous liquid in the timing ball 205 slowly flows down along the capillary tube 208 under the action of gravity; observing through the observation window 7, recording the time difference of the upper liquid level of the fluid flowing through the upper scale mark 206 and the lower scale mark 207 by using timing equipment, repeating the experiment for six times to obtain the average time, obtaining the kinematic viscosity value of the viscosity fluid to be measured by combining a standard capillary viscometer 2 constant and a formula upsilon ═ C · Δ t, and further obtaining the kinematic viscosity value of the viscosity fluid to be measured by combining a density measurement result and a formula η ═ ρ · upsilon.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A valuing device for low-temperature viscous fluids, comprising a housing (1), characterized in that: a tank body (8) is formed inside the shell (1), a baffle (12) is fixedly installed on the inner wall of the tank body (8), a standard capillary viscometer (2) is arranged on the left side of the baffle (12), and a stirring device (9), a heating device (10) and a refrigerating device (11) are arranged on the right side of the baffle (12);
the standard capillary viscometer (2) is characterized in that a disc part (13) is spliced at the top, an external thread (14) is arranged on the outer wall of the disc part (13), a positioning frame (4) is connected to the external thread of the external thread (14), and the positioning frame (4) is fixedly arranged at the top of the lifting platform (6).
2. A valuing device for a low temperature viscosity fluid according to claim 1, wherein: the stirring device (9) comprises a motor and a stirring rod, the motor is fixedly arranged at the top of the shell (1), the stirring rod is fixedly arranged at the top of an output shaft of the motor, and stirring blades are also fixedly arranged on the outer wall of the stirring rod;
the heating device (10) is an electric heating pipe and is arranged on the upper half part of the stirring rod in a surrounding mode, and the refrigerating device (11) is a refrigerating pipe and is arranged on the lower half part of the stirring rod in a surrounding mode.
3. A valuing device for a low temperature viscosity fluid according to claim 2, wherein: the standard capillary viscometer (2) comprises a main pipe (201), a first branch pipe (202) and a second branch pipe (203) which are arranged in parallel in the same plane, wherein a liquid level ball (204), a timing ball (205) and a suspension ball (209) are sequentially arranged in the main pipe (201) from top to bottom, an upper scale mark (206) is arranged at the top of the timing ball (205), a lower scale mark (207) is arranged at the bottom of the timing ball (205), a capillary pipe fitting (208) is arranged between the timing ball (205) and the suspension ball (209), the bottom end of the second branch pipe (203) is communicated with the suspension ball (209), a liquid inlet pipe (210) is fixedly arranged at the bottom of the main pipe (201), the liquid inlet pipe (210) is inserted in the liquid storage ball (211), and the liquid storage ball (211) is communicated with the bottom end of the first branch pipe (202).
4. A valuing device for a low temperature viscosity fluid according to claim 3, wherein: the outer wall of the shell (1) is also provided with an observation window (7), and the position of the observation window (7) corresponds to the position of the timing ball (205);
the observation window (7) is of a multi-layer glass structure, and defrosting and drying technologies are adopted among the multi-layer glass.
5. A valuing device for a low temperature viscosity fluid according to claim 4, wherein: the utility model discloses a lamp, including disc spare (13), the bottom fixed mounting of disc spare (13) has U type frame (3), the outer wall activity of U type frame (3) is provided with first fixation clamp (16) and second fixation clamp (17), the inner wall swing joint of first fixation clamp (16) has first branch pipe (202), the terminal fixed mounting of second fixation clamp (17) has lamp source (15), the mounted position of lamp source (15) is corresponding with the position of timing ball (205).
6. A valuing device for a low temperature viscosity fluid according to claim 5, wherein: the positioning frame (4) comprises a connecting sleeve (401), a sealing ring (402) and a connecting rod (403), the disc part (13) is in threaded connection with the inner wall of the connecting sleeve (401), a sealing cover (5) is fixedly installed at the top of the disc part (13), the sealing ring (402) is movably arranged on the outer wall of the connecting sleeve (401), and the sealing ring (402) is fixedly installed on the inner top wall of the shell (1);
the outer wall of the connecting sleeve (401) is also fixedly provided with a connecting rod (403), the outer wall of the tail end of the connecting rod (403) is provided with a movable groove (404), and the inner wall of the movable groove (404) is movably provided with a positioning bolt (405);
the lifting platform (6) comprises a bottom barrel (601) and an electric push rod (602), the electric push rod (602) is arranged inside the bottom barrel (601), a lifting rod (603) is fixedly arranged at the top of an output shaft of the electric push rod (602), and a positioning bolt (405) is in threaded connection with the top of the lifting rod (603) and is used for fixedly arranging a connecting rod (403) at the top of the lifting rod (603).
7. A valuing device for a low temperature viscosity fluid according to claim 6, wherein: a first air pipe (501) and a second air pipe (502) are oppositely and fixedly arranged on the outer wall of the sealing cover (5);
a first through pipe (503) and a second through pipe (504) are fixedly mounted on the outer wall of the sealing cover (5) in an adjacent mode, the bottom ends of the first through pipe (503) and the second through pipe (504) are respectively in soft connection with the top ends of the second branch pipe (203) and the main pipe (201), and a first electromagnetic valve (505) and a second electromagnetic valve (506) are respectively arranged inside the first through pipe (503) and the second through pipe (504);
a first inert gas source (507) is arranged at the tail end of the first gas pipe (501), a second inert gas source (508) is arranged at the tail end of the first through pipe (503), and a vacuum pump (509) is arranged at the tail end of the second through pipe (504);
the input ends of the first inert gas source (507) and the second inert gas source (508) are electrically connected with an inert gas controller (18), and the input end of the vacuum pump (509) is electrically connected with a vacuumizing device controller (19).
8. A method for valuing a low temperature viscosity fluid, for a valuing device for a low temperature viscosity fluid according to any one of claims 1 to 7, wherein: the method comprises the following steps:
s01, installation: vertically installing a cleaned standard capillary viscometer (2) on a U-shaped frame (3), checking the position of the standard capillary viscometer (2) on the U-shaped frame (3), determining that the position of the standard capillary viscometer (2) is vertical when a capillary pipe (208) on a main pipe (201) is parallel to the U-shaped frame (3), connecting a lifting table (6), a positioning frame (4) and the U-shaped frame (3), adjusting the relative position of the lifting table, the positioning frame and a groove body (8), and installing a thermometer at the center of a disc piece (13);
s02, liquid filling: adding a liquid with a certain viscosity value to a liquid storage ball (211) from the nozzle of the first branch pipe (202) by using a syringe;
s03, sealing: a first air pipe (501) is connected with a first inert gas source (507), a second air pipe (502) is connected with the atmosphere, a first through pipe (503) is in soft connection with a second branch pipe (203), a second through pipe (504) is in soft connection with a main pipe (201), the outside of the first through pipe (503) is connected with a second inert gas source (508) through a first electromagnetic valve (505), and the second through pipe (504) is connected with a vacuum pump (509) through a second electromagnetic valve (506);
s04, inert atmosphere: opening a first electromagnetic valve (505) and a second electromagnetic valve (506), opening a second inert gas source (508) to enable inert gas to enter a second branch pipe (203), enabling the inert gas to flow out of the main pipe (201) through the second electromagnetic valve (506) and discharge air in the main pipe (201), closing the second electromagnetic valve (506) to seal the main pipe (201) after a period of time, continuing to introduce the inert gas, enabling the inert gas to enter the first branch pipe (202) through a liquid inlet pipe (210), discharging the air in the first branch pipe (202), opening a first inert gas source (507), gradually discharging the air in a sealing cover (5), cutting off the second inert gas source (508), closing the first electromagnetic valve (505), and keeping the whole standard capillary viscometer (2) under an inert atmosphere after a period of time;
s05, constant temperature: setting a target temperature of the tank body (8), adjusting the temperature to a constant value based on a measurement result of a thermometer, and keeping the temperature for more than 20min until the temperature is uniform;
s06, measurement: closing the first electromagnetic valve (505) to seal the second branch pipe (203), opening the second electromagnetic valve (506) and opening the vacuum pump (509) to provide negative pressure for the main pipe (201), slowly sucking the viscosity liquid to be measured into the timing ball (205) from the liquid storage ball (211), opening the light source (15), observing through the observation window (7), and cutting off the vacuum pump (509) when the viscosity liquid reaches the liquid level ball (204);
then, opening the first electromagnetic valve (505) to connect the second branch pipe (203) with the atmosphere, and rapidly returning the viscosity liquid in the suspension ball (209) to the liquid storage ball (211); the viscous liquid in the timing ball (205) slowly flows down along the capillary tube (208) under the action of gravity; observing through an observation window (7), recording the time difference of the upper liquid level of the fluid flowing through an upper scale mark (206) and a lower scale mark (207) by using timing equipment, carrying out six times of repeated experiments to obtain the average time, combining with a constant of a standard capillary viscometer (2), obtaining the kinematic viscosity value of the viscosity fluid to be measured by a formula upsilon-C-deltat, and further combining with a density measurement result, obtaining the kinematic viscosity value of the viscosity fluid to be measured by a formula eta-rho-upsilon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110241867.6A CN112834387A (en) | 2021-03-04 | 2021-03-04 | Constant value device and method for low-temperature viscosity liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110241867.6A CN112834387A (en) | 2021-03-04 | 2021-03-04 | Constant value device and method for low-temperature viscosity liquid |
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| CN112834387A true CN112834387A (en) | 2021-05-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116212783A (en) * | 2022-12-29 | 2023-06-06 | 仁化县奥达胶合板有限公司 | Apparatus for producing of adhesive for composite plywood |
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2021
- 2021-03-04 CN CN202110241867.6A patent/CN112834387A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116212783A (en) * | 2022-12-29 | 2023-06-06 | 仁化县奥达胶合板有限公司 | Apparatus for producing of adhesive for composite plywood |
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