CN112179808A - Automatic calibrating device and method for standard capillary viscometer - Google Patents
Automatic calibrating device and method for standard capillary viscometer Download PDFInfo
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- 238000001514 detection method Methods 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/06—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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N2011/0006—Calibrating, controlling or cleaning viscometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N2011/0006—Calibrating, controlling or cleaning viscometers
- G01N2011/002—Controlling sample temperature; Thermal cycling during measurement
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Abstract
The invention belongs to the technical field of metering equipment, and particularly relates to an automatic calibrating device and method for a standard capillary viscometer, wherein the device comprises a standard capillary viscometer, a constant temperature water tank, an infrared liquid level monitor, a temperature control box, a temperature sensor, a liquid pump and a single chip microcomputer; automatic verification is realized through the device. The invention solves the problems of large temperature fluctuation of the thermostatic bath, inaccurate measurement and low manual measurement and verification efficiency.
Description
Technical Field
The invention belongs to the technical field of metering equipment, and particularly relates to an automatic calibrating device and method for a standard capillary viscometer.
Background
In the field of national viscosity measurement, a standard capillary viscometer is a main standard device of a capillary viscometer standard device, whether the measurement value is accurate or not is related to a whole viscosity measurement value transfer system, and the accuracy of the standard capillary viscometer directly influences the measurement value accuracy of a secondary standard viscosity liquid, a working capillary viscometer, an outflow cup type viscometer, a falling ball viscometer and the like, so that the viscosity measurement result of a measured fluid is influenced. An automatic calibrating device of a standard capillary viscometer is a prerequisite for ensuring the viscosity value.
The standard capillary viscometer includes an inlet tube, a vent tube, and a measurement tube. The main equipment required for verifying the standard capillary viscometer is a thermostatic bath, temperature measuring equipment and timing equipment. The calibration process is to put a certain amount of standard viscosity liquid into the viscosity meter to be tested through the air inlet pipe, block up the blow-down pipe under the constant temperature condition, suck the standard viscosity liquid to the ball-up marking line on the measuring pipe, time the time interval of the standard viscosity liquid flowing through the ball-up marking line and the ball-down marking line, and obtain the viscosity meter constant by dividing the movement viscosity value of the standard viscosity liquid by the outflow time.
In the prior art, when the standard capillary tube viscosity is detected, the temperature control requirements of the constant temperature bath are that the temperature fluctuation degree is not more than +/-0.005 ℃/8h, the temperature field uniformity is not more than 0.01 ℃, the constant temperature efficiency of the conventional constant temperature bath is low, and especially in winter and summer, when the difference between the room temperature and the detection temperature is large, the time for cooling/heating and temperature reaching balance is long. The standard capillary viscometer is of a three-way structure, the liquid absorption process is complex during verification, the automatic/semi-automatic verification device of the existing capillary viscometer is only suitable for a working viscometer, the temperature control field, the vertical adjustment mode and the automatic liquid absorption mode of the existing capillary viscometer are not suitable for the standard viscometer, the verification of the existing standard capillary viscometer is manually operated, manual liquid absorption, timing and constant operation of personnel are required, and the verification efficiency is low.
Disclosure of Invention
Aiming at the technical problems existing at present, the invention provides an automatic calibrating device and method for a standard capillary viscometer, which aim to solve the problems of large temperature fluctuation of a thermostatic bath, inaccurate measurement and low manual measurement and calibration efficiency.
The invention provides an automatic calibrating device of a standard capillary viscometer, which comprises a standard capillary viscometer, a constant temperature water tank, an infrared liquid level monitor, a temperature control box, a temperature sensor, a liquid pump and a single chip microcomputer;
the constant-temperature water tank is of a glass barrel structure, a barrel cover is movably connected above the constant-temperature water tank, a standard capillary viscosity meter clamping plate, a temperature sensor clamping plate and a liquid outlet are arranged on the barrel cover, the standard capillary viscosity meter clamping plate is clamped with a standard capillary viscometer, and the temperature sensor clamping plate is clamped with a temperature sensor; an annular spray pipe is arranged at the bottom of the constant-temperature water tank, a buffer plate with holes is fixedly connected right above the annular spray pipe, and the holes in the buffer plate are radially arranged; a liquid inlet of the annular spray pipe is arranged on the side wall of the constant-temperature water tank; a liquid outlet of the temperature control box is connected with a liquid inlet of the annular spray pipe through a liquid inlet pipe, a liquid pump is arranged on the liquid inlet pipe, a liquid outlet of the barrel cover is connected with a liquid inlet of the temperature control box through a liquid outlet pipe, and a heating sheet is arranged inside the temperature control box;
the infrared liquid level monitor comprises an upper infrared transmitter, an upper infrared receiver, a lower infrared transmitter, a lower infrared receiver, a left stud, a right stud, a left clamping plate and a right clamping plate; the left stud is connected with the upper infrared transmitter, the left clamping plate and the lower infrared transmitter from top to bottom at one time, and the right stud is connected with the upper infrared receiver, the right clamping plate and the lower infrared receiver from top to bottom; the upper infrared transmitter and the upper infrared receiver, the left clamping plate and the right clamping plate, and the lower infrared transmitter and the lower infrared receiver are respectively positioned at the same level; the left clamping plate and the right clamping plate are connected through studs, the corresponding surfaces of the left clamping plate and the right clamping plate are curved surfaces, and the left clamping plate and the right clamping plate surround clamping holes through the studs; the clamping hole is clamped on a measuring tube of a standard capillary viscometer and is positioned between the upper liquid storage ball and the measuring ball;
the single-chip microcomputer is in two-way communication connection with the temperature sensor, the upper infrared transmitter, the upper infrared receiver, the lower infrared transmitter and the lower infrared receiver, and a signal output end of the single-chip microcomputer is in communication connection with the heating sheet and the liquid pump.
Preferably, the distance between the buffer plates is 1-3 cm; further preferably, the holes on the two buffer plates are distributed in a staggered mode, so that water flow is buffered through the buffer plates, the flow velocity of the water flow is reduced, the water flow is prevented from being sprayed, excessive fluctuation of the water temperature is avoided, fluctuation of the water temperature is reduced, and the accuracy of detection is improved.
Preferably, the outer side surface of the constant-temperature water tank is provided with scale marks, so that the water quantity in the constant-temperature water tank can be observed conveniently, and the water quantity in the water tank can be controlled conveniently.
Preferably, the temperature control box, the liquid pump and the single chip microcomputer are all arranged in the shell, four adjustable support legs are arranged on the periphery of the bottom surface of the shell, and the shell is of an L-shaped structure.
Preferably, temperature control box, liquid pump all set up in the casing transverse structure, and the singlechip setting is in the vertical structure of casing, and the side of casing transverse structure is provided with ventilative grid, the convenient heat dissipation.
Preferably, the upper surface of the vertical structure of the shell is provided with a lifting handle which is connected with the shell through a hinge, so that the position can be moved conveniently.
Preferably, the upper surface of the vertical structure of the shell is provided with a level gauge, so that the horizontal state of the calibrating device can be observed.
Preferably, the lower end of the constant-temperature water tank is sleeved with an annular positioning plate, and the lower surface of the annular positioning plate is fixedly connected with the upper surface of the transverse structure of the shell.
Preferably, the housing is further provided with a storage compartment, the storage compartment is connected with a storage drawer in a sliding manner through a drawing guide rail arranged on the inner side surface of the storage compartment, and the storage drawer is provided with a handle. The storage drawer is convenient for instrument equipment to be stored, and the handle is arranged on the storage drawer and is convenient to pull.
Preferably, the housing is further provided with a storage compartment, the storage compartment is provided with a cover, and the cover is provided with a handle.
An automatic calibration method of a standard capillary viscometer comprises the following steps:
(1) setting a preset temperature of the constant-temperature water tank;
(2) the singlechip receives the real-time temperature output by the temperature sensor and judges whether the water circulation temperature control needs to be started or not; if so, controlling the temperature control sheet and the liquid pump, and adjusting the temperature of the circulating water until the real-time temperature does not exceed the preset temperature +/-0.005 ℃/8 h; if not, stopping the operation;
(3) adjusting the positions of the upper infrared transmitter and the lower infrared transmitter to be positioned at the upper ball marking line of the measuring tube, and the positions of the lower infrared transmitter and the lower infrared receiver to be positioned at the lower ball marking line of the measuring tube, and clamping the clamping hole on the measuring tube of the standard capillary viscometer and between the upper liquid storage ball and the measuring ball;
(4) putting a standard capillary viscometer and an infrared liquid level monitor into a constant-temperature water tank;
(5) injecting the standard viscosity liquid into a standard capillary viscometer through an air inlet pipe to ensure that the liquid level of the standard capillary viscometer reaches 2/3 of a main liquid storage ball; blocking the emptying pipe 1-2, and sucking the standard viscosity liquid to the upper ball marked line 1-5;
(6) the single chip microcomputer receives the time when the standard viscosity liquid flows through the upper ball marking line of the measuring tube and the lower ball marking line of the measuring tube, and the time difference is measured; the time difference is repeatedly measured, and the viscosity meter constant is calculated by taking the average value.
In the invention, the automatic calibrating device of the standard capillary viscometer is adjusted to be in a horizontal state through the level gauge and the adjustable support leg; adjusting the positions of the upper infrared transmitter and the upper infrared receiver to enable the positions to correspond to the position of the ball marking on the measuring tube; the lower infrared transmitter and the lower infrared receiver are positioned at the position of the lower ball marking line of the measuring pipe, and the upper infrared transmitter, the upper infrared receiver, the lower infrared transmitter and the lower infrared receiver are started; clamping a clamping hole on a measuring tube of a standard capillary viscosimeter and between an upper liquid storage ball and a measuring ball, placing the standard capillary viscosimeter and an infrared liquid level monitor into a constant-temperature water tank, injecting standard viscosity liquid into 2/3 parts of the standard capillary viscosimeter and the upper liquid storage ball, blocking a vent pipe under the constant temperature condition, and sucking the standard viscosity liquid to an upper ball marking line on the measuring tube; the constant-temperature water tank is filled with clear water, the clear water reaches a proper scale, the temperature sensor transmits the water temperature to the single chip microcomputer, the single chip microcomputer judges whether the water temperature is proper or not, if the water temperature is proper, the operation is not stopped, if the water temperature is not proper, the liquid pump and the heating sheet are controlled, water flows into the temperature control box from the liquid outlet of the top cover through the liquid outlet pipe, the heating sheet in the temperature control box is heated to a certain temperature, the liquid pump provides power to enable the water in the temperature control box to flow into the annular spray pipe through the liquid inlet pipe, the annular spray pipe sprays water upwards, the water enters the constant-temperature water tank through the buffer plate, the water flow is uniform, the impact force is small, the water flows back to a; after the measurement is started, the time of standard viscosity liquid flow received by the upper infrared receiver at the position of the ball marking on the measuring tube is recorded by the single chip microcomputer, the time of the standard viscosity liquid flow received by the upper infrared receiver at the position of the ball marking under the measuring tube is recorded, the time difference is measured, the measurement is repeated, the average value is taken, and the constant of the viscometer is calculated.
The invention has the following beneficial effects:
(1) through in the constant temperature water tank, the cooperation of annular nozzle and buffer plate is used, prevents that rivers from excessively arousing the excessive fluctuation of temperature, effectively reduces the difference in temperature of liquid in the constant temperature water tank, realizes at 15 ~ 50 ℃ within range, and the temperature fluctuation degree is no longer than 0.005 ℃/8h, and the temperature field degree of consistency is no longer than 0.01 ℃, provides good stable environment for the examination of standard capillary viscosimeter, ensures the accuracy of examination.
(2) The temperature sensor transmits signals to the single chip microcomputer, the single chip microcomputer controls the heating temperature and the heating rate of the heating sheet, the single chip microcomputer controls the flow of the liquid conveyed by the liquid pump, the stability of the temperature of the constant-temperature water tank is further guaranteed, and the accuracy of verification is guaranteed.
(3) When standard viscosity liquid flows between the upper/lower infrared transmitter and the upper/lower infrared receiver, the upper/lower infrared receiver receives infrared information and sends a signal to the single chip microcomputer, the single chip microcomputer starts/stops timing, the time interval of the standard viscosity liquid flowing through the upper ball marking and the lower ball marking of the measuring tube is quickly and accurately obtained, and compared with manual timing, the method is quicker and more accurate, and the accuracy and the efficiency of detection are improved.
(4) Through the cooperation of the left/right clamping plate and the stud on the infrared liquid level monitor, a clamping hole is formed, the device can be suitable for standard capillary viscosimeters with different sizes, the measurement pipe can be rapidly positioned and installed, and the calibration efficiency is improved.
(5) Carry the position that the setting of carrying handle made things convenient for this standard capillary viscometer's automatic calibrating installation to remove, the casing bottom sets up the cooperation of adjustable stabilizer blade and spirit level and uses, can effectively guarantee that this standard capillary viscometer's automatic calibrating installation is located the horizontality when the operation, and the storage drawer's setting has made things convenient for instrument and equipment's storage.
The invention provides an automatic calibrating device and method for a standard capillary viscometer, which solve the problems of large temperature fluctuation of a thermostatic bath, inaccurate measurement and low calibrating efficiency of manual measurement.
Drawings
FIG. 1 is a schematic diagram of an automatic verification device according to the present invention;
FIG. 2 is a left side view of the automatic verification apparatus of the present invention;
FIG. 3 is a rear view of the automatic verification apparatus of the present invention;
FIG. 4 is a top view of the automated verification apparatus of the present invention;
FIG. 5 is a schematic view of the infrared liquid level monitor of the automatic calibration apparatus of the present invention;
FIG. 6 is a schematic diagram of the construction of the annular nozzle and the baffle of the automatic calibration apparatus of the present invention;
FIG. 7 is a schematic diagram of a standard capillary viscometer of an automated verification device according to the invention;
in the figure, 1-standard capillary viscometer, 1-1 air inlet pipe, 1-2 emptying pipe, 1-3 measuring pipe, 1-4 upper liquid storage ball, 1-5 upper ball marking, 1-6 measuring ball, 1-7 lower ball marking, 1-8 main liquid storage ball, 2 temperature sensor, 3 temperature sensor clamping plate, 4 barrel cover, 5 liquid outlet pipe, 6 standard capillary viscometer clamping plate, 7 constant temperature water tank, 8 air permeable grid, 9 annular positioning plate, 10 adjustable support leg, 11 single chip microcomputer, 12 shell, 13 lifting handle, 14 level gauge, 15 storage bin, 16 storage drawer, 17 temperature control tank, 18 heating sheet, 19 liquid pump, 20 annular spraying pipe, 21 buffer plate, 22 infrared liquid level detector, 22-1 is an upper infrared transmitter, 22-2 is an upper infrared receiver, 22-3 is a lower infrared transmitter, 22-4 is a lower infrared receiver, 22-5 is a left clamping plate, 22-6 is a right clamping plate, 22-7 is a left stud, 22-8 is a right stud, 22-9 is a stud, 22-10 is a clamping hole, and 23 is a liquid inlet pipe.
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.
Example 1
As shown in fig. 1-7, an automatic calibrating apparatus for a standard capillary viscometer comprises a standard capillary viscometer 1, a constant temperature water tank 7, an infrared liquid level monitor 22, a temperature control box 17, a temperature sensor 2, a liquid pump 19 and a single chip microcomputer 11; the constant-temperature water tank 7 is of a glass barrel structure, and scale marks are arranged on the outer side surface of the constant-temperature water tank 7, so that the water quantity in the constant-temperature water tank 7 can be conveniently observed, and the water quantity in the water tank can be conveniently controlled; a barrel cover 4 is movably connected above the constant-temperature water tank 7, a quasi-capillary viscometer clamping plate 6 and a temperature sensor clamping plate 3 are arranged on the barrel cover 4, the standard capillary viscometer clamping plate 6 is connected with a standard capillary viscometer 1, and the temperature sensor clamping plate 3 is connected with a temperature sensor 2 in a clamping manner; an annular spray pipe 20 is arranged at the bottom of the constant-temperature water tank 7, a buffer plate 21 with holes is fixedly connected right above the annular spray pipe 20, the holes in the buffer plate 21 are radially arranged, the number of the buffer plates 21 is two, the distance between the buffer plates 21 is 1-3cm, and the holes in the buffer plates 21 are distributed in a staggered manner, so that the flow velocity of water flow is reduced, and excessive fluctuation of water temperature caused by excessive water flow is prevented; a liquid inlet of the annular spray pipe 20 is arranged on the side wall of the constant-temperature water tank 7; a liquid outlet is formed in the barrel cover 4, the liquid outlet of the barrel cover 4 is connected with a liquid inlet of the temperature control box 17 through a liquid outlet pipe 5, the liquid outlet of the temperature control box 17 is connected with a liquid inlet of the annular spray pipe 20 through a liquid inlet pipe 23, and a liquid pump 19 is arranged on the liquid inlet pipe 23; a heating sheet 18 is arranged in the temperature control box 17; the annular spray pipe 20 and the buffer plate 21 are matched in the constant-temperature water tank 7, so that excessive fluctuation of water temperature caused by water flow is prevented, the temperature difference of liquid in the constant-temperature water tank 7 is effectively reduced, the temperature fluctuation degree is not more than +/-0.005 ℃/8h and the temperature field uniformity is not more than 0.01 ℃ within the range of 15-50 ℃, a good and stable environment is provided for the calibration of a standard capillary viscometer, and the calibration accuracy is ensured; the water of the constant temperature water tank flows into the temperature control box through the guide pipe, the temperature is adjusted through the heating sheet in the temperature control box, the water returns to the constant temperature water tank through the liquid pump, and the stability of the temperature is maintained through water circulation.
The infrared liquid level monitor 22 comprises an upper infrared transmitter 22-1, an upper infrared receiver 22-2, a lower infrared transmitter 22-3, a lower infrared receiver 22-4, a left stud 22-7, a right stud 22-8, a left snap-gauge 22-5 and a right snap-gauge 22-6, wherein the left stud 22-7 is connected with the upper infrared transmitter 22-1, the left snap-gauge 22-5 and the lower infrared transmitter 22-3 from top to bottom at one time, and the right stud 22-8 is connected with the upper infrared receiver 22-2, the right snap-gauge 22-5 and the lower infrared receiver 22-4 from top to bottom; wherein the upper infrared transmitter 22-1 and the upper infrared receiver 22-2, the left card 22-5 and the right card 22-6, the lower infrared transmitter 22-3 and the lower infrared receiver 22-4 are respectively positioned at the same level; the left clamping plate 22-5 and the right clamping plate 22-6 are connected through a stud 22-9, the corresponding surfaces of the left clamping plate 22-5 and the right clamping plate 22-6 are curved surfaces, and a clamping hole 22-10 is formed by the left clamping plate 22-5 and the right clamping plate 22-6 in a surrounding mode through the stud 22-9; the clamping holes 22-10 are clamped on the measuring tubes 1-3 of the standard capillary viscometer 1 and are positioned between the upper liquid storage ball 1-4 and the measuring balls 1-6;
the single chip microcomputer 11 is in two-way communication connection with the temperature sensor 2, the upper infrared transmitter 22-1, the upper infrared receiver 22-2, the lower infrared transmitter 22-3 and the lower infrared receiver 22-4, and a signal output end of the single chip microcomputer 11 is in communication connection with the heating plate 18 and the liquid pump 19; wherein, if the temperature sensor 2, the upper infrared receiver 22-2 and the lower infrared receiver 22-4 are digital signals, the singlechip 11 is directly connected in a communication way. If the temperature sensor 2, the upper infrared receiver 22-2 and the lower infrared receiver 22-4 are analog signals, the analog signals and the digital signals are directly converted by connecting the singlechip 11 through an A/D converter in a communication manner. The temperature sensor 2 transmits a signal to the singlechip 11, the singlechip 11 controls the heating temperature and the heating rate of the heating sheet 18, and the singlechip 11 controls the opening of the liquid pump 19 and the flow of the conveying liquid, so that the stability of the temperature of the constant-temperature water tank 7 is further ensured, and the accuracy of verification is ensured; when the standard viscosity liquid flows between the upper/lower infrared transmitter and the upper/lower infrared receiver, the upper/lower infrared receiver receives infrared information and sends a signal to the single chip microcomputer 11, the single chip microcomputer 11 starts/stops timing, the time interval of the standard viscosity liquid flowing through the upper ball marking 1-5 and the lower ball marking 1-7 of the measuring tube 1-6 is quickly and accurately obtained, and compared with manual timing, the method is quicker and more accurate, and the accuracy and the efficiency of detection are improved.
The temperature control box 17, the liquid pump 19 and the single chip microcomputer 11 are all arranged in the shell 12, four adjustable support legs 10 are arranged on the periphery of the bottom surface of the shell 12, and the shell 12 is of an L-shaped structure; the temperature control box 17 and the liquid pump 19 are both arranged in the transverse structure of the shell 12, the single chip microcomputer 11 is arranged in the vertical structure of the shell 12, and the ventilating grille 8 is arranged on the side surface of the transverse structure of the shell 12, so that heat dissipation is facilitated; a lifting handle 13 is arranged on the upper surface of the vertical structure of the shell 12 and is connected with the shell 12 through a hinge, so that the position movement is facilitated; a level 14 is arranged on the upper surface of the vertical structure of the shell 12, so that the horizontal state of the calibrating device can be observed; the lower end of the constant-temperature water tank 7 is sleeved with an annular positioning plate 9, and the lower surface of the annular positioning plate 9 is fixedly connected with the upper surface of the transverse structure of the shell 12; still be equipped with storage compartment 15 in the casing 12, storage compartment 15 has storage drawer 16 through the pull guide rail sliding connection who sets up at its inboard face, and is provided with the handle on storage drawer 16, sets up the storing and takes out, 16 instrument equipment's storage of being convenient for, and the setting of handle makes things convenient for the pull.
In the invention, the automatic calibrating device of the standard capillary viscometer 1 is adjusted to be in a horizontal state through the level gauge 14 and the adjustable supporting leg 10; adjusting the positions of the upper infrared emitter 22-1 and the lower infrared emitter 22-3 to correspond to the positions 1-5 of the upper ball marked lines of the measuring tubes 1-6; the positions of the lower infrared transmitter 22-3 and the lower infrared receiver 22-3 correspond to the position 1-7 of the lower ball mark of the measuring pipe 1-6, and the upper infrared transmitter 22-1, the upper infrared receiver 22-2, the lower infrared transmitter 22-3 and the lower infrared receiver 22-4 are started; clamping a clamping hole 22-10 on a measuring tube 1-3 of a standard capillary viscometer 1 and between an upper liquid storage ball 1-4 and a measuring ball 1-6, placing the standard capillary viscometer 1 and an infrared liquid level monitor 22 into a constant temperature water tank, injecting standard viscosity liquid into 2/3 positions from the standard capillary viscometer 1 to a main liquid storage ball 1-8, blocking a vent pipe 1-2 under a constant temperature condition, and sucking the standard viscosity liquid to an upper ball marking line 1-5 position on the measuring tube 1-6; the constant-temperature water tank 7 is filled with clean water and reaches a proper scale, the temperature sensor 2 transmits the water temperature to the single chip microcomputer 11, the single chip microcomputer 11 judges whether the water temperature is proper or not, if the water temperature is proper, the operation is not stopped, if the water temperature is not proper, the liquid pump 19 and the heating sheet 18 are controlled, water flows into the temperature control box 17 from the liquid outlet of the top cover 4 through the liquid outlet pipe 5, then the water is heated to a certain temperature through the heating sheet 18 in the temperature control box 17, the liquid pump 19 provides power to enable the water in the temperature control box 17 to flow into the annular spray pipe 20 through the liquid inlet pipe 23, the annular spray pipe 20 sprays water upwards, the water enters the constant-temperature water tank 7 through the buffer plate 21, the water flow is uniform, the impact force is small, the water circularly flows back to the set temperature, the temperature; after the measurement is started, the single chip microcomputer 11 records the time when the standard viscosity liquid received by the upper infrared receiver 22-2 flows through the upper ball marking 1-5 of the measuring tube 1-3, records the time when the standard viscosity liquid received by the upper infrared receiver 22-4 flows through the lower ball marking 1-7 of the measuring tube 1-3, measures the time difference, repeatedly measures, takes an average value, and calculates the constant of the viscometer.
Example 2
An automated method of calibrating a standard capillary viscometer is as follows: after the automatic calibrating device is installed, setting the preset temperature of the constant-temperature water tank 7; the singlechip 11 receives a real-time temperature signal output by the temperature sensor 2 and judges whether the water circulation temperature control needs to be started or not; if yes, controlling the heating sheet 18 and the liquid pump 19, and adjusting the temperature of the circulating water until the real-time temperature does not exceed the preset temperature +/-0.005 ℃/8 h; if not, stopping the operation; adjusting the positions of the upper infrared emitter 22-1 and the lower infrared receiver 22-2 to correspond to the position of an upper ball marking 1-5 of the measuring pipe 1-3 and the positions of the lower infrared emitter 22-3 and the lower infrared receiver 22-4 to correspond to the position of a lower ball marking 1-7 of the measuring pipe 1-3; clamping the clamping holes 22-10 on the measuring tube 1-3 of the standard capillary viscometer 1 and between the upper liquid storage ball 1-4 and the measuring ball 1-6; injecting the standard viscosity liquid into a standard capillary viscometer 1 through an air inlet pipe 1-1, and enabling the liquid level of the standard capillary viscometer to reach 2/3 of a main liquid storage ball 1-8; blocking the emptying pipe 1-2, sucking the standard viscosity liquid to the upper ball marked line 1-5, receiving the time when the standard viscosity liquid naturally flows through the upper ball marked line 1-5 of the measuring pipe 1-3 and the lower ball marked line 1-7 of the measuring pipe 1-3 by the singlechip 11, and measuring the time difference; the time difference is repeatedly measured, and the viscosity meter constant is calculated by taking the average value.
The invention solves the problems of large temperature fluctuation of the thermostatic bath, inaccurate measurement and low calibration efficiency of manual measurement, the used device is simple, the installation, the disassembly and the maintenance are easy, the calibration method is simple to operate, the automation of the calibration is realized, and the calibration efficiency and the accuracy are improved.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. An automatic calibrating device of a standard capillary viscometer comprises a standard capillary viscometer (1), and is characterized by further comprising an infrared liquid level monitor (22), a constant temperature water tank (7), a temperature control box (17), a temperature sensor (2), a liquid pump (19) and a single chip microcomputer (11);
the constant-temperature water tank (7) is of a glass barrel structure, a barrel cover (4) is movably connected above the constant-temperature water tank (7), a standard capillary viscosity meter clamping plate (6), a temperature sensor clamping plate (3) and a liquid outlet are arranged on the barrel cover (4), the standard capillary viscosity meter clamping plate (6) is clamped with the standard capillary viscosity meter (1), and the temperature sensor clamping plate (3) is clamped with the temperature sensor (2); an annular spray pipe (20) is arranged at the bottom of the constant-temperature water tank (7), a buffer plate (21) with holes is fixedly connected right above the annular spray pipe (20), and the holes on the buffer plate (21) are arranged in a radial shape; a liquid inlet of the annular spray pipe (20) is arranged on the side wall of the constant-temperature water tank (7); a liquid outlet of the temperature control box (17) is connected with a liquid inlet of the annular spray pipe (20) through a liquid inlet pipe (23), a liquid pump (19) is arranged on the liquid inlet pipe (23), and a liquid outlet of the barrel cover (4) is connected with a liquid inlet of the temperature control box (17) through a liquid outlet pipe (5); a heating sheet (18) is arranged in the temperature control box (17);
the infrared liquid level monitor (22) comprises an upper infrared transmitter (22-1), an upper infrared receiver (22-2), a lower infrared transmitter (22-3), a lower infrared receiver (22-4), a left stud (22-7), a right stud (22-8), a left clamping plate (22-5) and a right clamping plate (22-6); the left stud (22-7) is sequentially connected with an infrared transmitter (22-1), a left clamping plate (22-5) and a lower infrared transmitter (22-3) from top to bottom, and the right stud (22-8) is sequentially connected with an infrared receiver (22-2), a right clamping plate (22-6) and a lower infrared receiver (22-4) from top to bottom; wherein the upper infrared transmitter (22-1) and the upper infrared receiver (22-2), the left clamping plate (22-5) and the right clamping plate (22-6), and the lower infrared transmitter (22-3) and the lower infrared receiver (22-4) are respectively positioned at the same level; the left clamping plate (22-5) is connected with the right clamping plate (22-6) through a stud (22-9), the corresponding surface of the left clamping plate (22-5) and the right clamping plate (22-6) is a curved surface, and the left clamping plate (22-5) and the right clamping plate (22-6) are enclosed into a clamping hole (22-10) through the stud (22-6); the clamping holes (22-10) are clamped on a measuring tube of the standard capillary viscometer (1) and are positioned between the upper liquid storage ball (1-4) and the measuring ball (1-6);
the bidirectional communication of singlechip (11) connects temperature sensor (2), goes up infrared transmitter (22-1), goes up infrared receiver (22-2), goes down infrared transmitter (22-3) and infrared receiver (22-4) down, the signal output part communication of singlechip (11) connects heating plate (18) and liquid pump (19).
2. The automatic calibrating apparatus for a standard capillary viscometer of claim 1 wherein the buffer plates (21) are at least two, the distance between the buffer plates (21) being 1-3 cm.
3. The automatic calibrating device for the standard capillary viscometer of claim 1, wherein the outside of the thermostatic water tank (7) is provided with scale marks.
4. The automatic calibrating device for the standard capillary viscometer of claim 1, wherein the temperature control box (17), the liquid pump (19) and the single chip microcomputer (11) are all arranged in the housing (12), four adjustable legs (10) are arranged around the bottom surface of the housing (12), and the housing (12) is of an L-shaped structure.
5. The automatic calibrating device for the standard capillary viscometer of claim 4, wherein the temperature control box (17) and the liquid pump (19) are both arranged in a transverse structure of the shell (12), the single chip microcomputer (11) is arranged in a vertical structure of the shell (12), and the side surface of the transverse structure of the shell (12) is provided with the air permeable grating (8).
6. The automatic calibrating device for the standard capillary viscometer of claim 4, wherein the upper surface of the vertical structure of the housing (12) is provided with a lifting handle (13) and is connected with the housing (12) through a hinge, and the upper surface of the vertical structure of the housing (12) is provided with a level (14).
7. The automatic calibrating device for the standard capillary viscometer of claim 4, wherein the lower end of the constant temperature water tank (7) is sleeved with an annular positioning plate (9), and the lower surface of the annular positioning plate (9) is fixedly connected with the upper surface of the transverse structure of the shell (12).
8. The automatic calibrating device for the standard capillary viscometer of claim 4, wherein the housing (12) is further provided with a storage compartment (15), the storage compartment (15) is slidably connected with at least two layers of storage drawers (16) through drawing guide rails arranged on the inner side surface of the storage compartment, and the storage drawers (16) are provided with handles.
9. The automatic calibrating device for the standard capillary viscometer of claim 4, wherein the housing (12) is further provided with a storage compartment (15), a lid is arranged at the mouth of the storage compartment (15), and a handle is arranged on the lid.
10. An automatic calibration method of a standard capillary viscometer is characterized by comprising the following specific steps:
(1) setting a preset temperature of the constant-temperature water tank (7);
(2) the singlechip (11) receives the real-time temperature output by the temperature sensor (2) and judges whether the water circulation temperature control needs to be started or not; if yes, controlling the heating sheet (18) and the liquid pump (19), and adjusting the temperature of the circulating water until the real-time temperature does not exceed the preset temperature +/-0.005 ℃/8 h; if not, stopping the operation;
(3) adjusting the positions of an upper infrared transmitter (22-1) and an upper infrared receiver (22-2) to be positioned at an upper ball marking (1-5) of a measuring pipe (1-3) and the positions of a lower infrared transmitter (22-3) and a lower infrared receiver (22-4) to be positioned at a lower ball marking (1-7) of the measuring pipe (1-3), and clamping a clamping hole (22-10) to be clamped on the measuring pipe (1-3) of a standard capillary viscometer (1) and positioned between an upper liquid storage ball (1-4) and a measuring ball (1-6);
(4) putting a standard capillary viscometer (1) and an infrared liquid level monitor (22) into a constant-temperature water tank (7);
(5) injecting standard viscosity liquid into a standard capillary viscometer (1) through an air inlet pipe (1-1), enabling the liquid level of the standard capillary viscometer to reach 2/3 of a main liquid storage ball (1-8), blocking a vent pipe (1-2), and sucking the standard viscosity liquid to an upper ball marking (1-5);
(6) the single chip microcomputer (11) receives the time of standard viscosity liquid flowing through the ball marked line (1-5) on the measuring tube (1-3) and the ball marked line (1-7) under the measuring tube (1-3), and the time difference is measured; the time difference is repeatedly measured, and the viscosity meter constant is calculated by taking the average value.
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| CN202011005482.1A CN112179808A (en) | 2020-09-22 | 2020-09-22 | Automatic calibrating device and method for standard capillary viscometer |
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Application publication date: 20210105 |