CN109991127B - Verification and calibration device for rotational viscometer and operation method thereof - Google Patents
Verification and calibration device for rotational viscometer and operation method thereof Download PDFInfo
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- CN109991127B CN109991127B CN201910308517.XA CN201910308517A CN109991127B CN 109991127 B CN109991127 B CN 109991127B CN 201910308517 A CN201910308517 A CN 201910308517A CN 109991127 B CN109991127 B CN 109991127B
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- 238000012795 verification Methods 0.000 title claims abstract description 46
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- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000004321 preservation Methods 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 42
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- 230000005540 biological transmission Effects 0.000 claims description 15
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- 238000001514 detection method Methods 0.000 claims description 7
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- 239000000463 material Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
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Classifications
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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
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
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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
Abstract
The invention belongs to the field of measurement and calibration, and relates to a verification and calibration device for a rotational viscometer. The device comprises a constant temperature control groove, three circulation loops, a constant temperature water bath set, a multifunctional positioning bracket, a rotor outer cylinder set and a heat preservation sleeve set, wherein the three circulation loops are communicated with the constant temperature control groove through a flow dividing valve and a flow control valve, the first circulation loop comprises the constant temperature water bath set, and the multifunctional positioning bracket is used for supporting various types of rotary viscometers for detecting and calibrating conventional single-cylinder rotary viscometers and outer cylinder rotary viscometers; the second circulation loop comprises a rotor outer cylinder group and a heat preservation sleeve group which are used for calibrating the coaxial cylinder internal rotation type rotary viscometer and the small rotor single cylinder rotary viscometer with the heat preservation sleeve; the third circulation loop is used for detecting and calibrating a rotary viscometer comprising a sample disk and a rotor receiver and detecting the viscosity of the sample, and the three circulation loops are reasonably arranged on a double-layer test bed and automatically generate corresponding reports through a data processing system.
Description
Technical Field
The invention relates to viscosity detection, belongs to the technical field of measurement and metering science, and particularly relates to a verification and calibration device for a rotational viscometer and an operation method thereof.
Background
Viscosity measurement is an important means for controlling production flow in the fields of petroleum, chemical industry, textile, food, metallurgy, medicine, national defense and the like, ensuring production safety, evaluating product quality, medical detection and scientific research. The rotational viscometer has the advantages of wide testing range, convenient operation and simple maintenance, and is one of the important methods for measuring the hydrodynamic viscosity.
The rotary viscometer can be divided into a single-cylinder rotary viscometer, a coaxial cylinder internal rotation viscometer, a cone/plate type viscometer, an outer cylinder rotary viscometer and the like according to different specification types, and is mainly a conventional single-cylinder rotary viscometer. Conventional single-cylinder rotary viscometers, external-cylinder rotary viscometers have no special outer cylinder, coaxial-cylinder internal-rotation viscometers, single-cylinder rotary viscometers with heat preservation sleeves are generally self-contained with rotor outer cylinders or heat preservation sleeves, cone/plate-type viscometers, special small-rotor single-cylinder rotary viscometers are generally self-contained with sample trays or rotor acceptors.
Aiming at the verification and calibration of the rotational viscometer, in 2005, china goes out of JJG1002 'rotational viscometer verification procedure'. The procedure takes the transfer viscosity liquid as an upper standard, and an important link in the verification and calibration process is to keep the temperature of the transfer viscosity liquid stable and the container for the transfer viscosity liquid vertical to the rotor of the instrument. Since the viscosity value of the transfer viscosity fluid is greatly affected by temperature, a fluctuation of 0.5 ℃ can generate 1% error when converted into a viscosity change value, and the error is not negligible for a rotational viscometer with high accuracy. In the actual working process, verification calibration staff usually adopts a thermostat to keep the temperature of the transmission viscosity liquid, and the transmission viscosity liquid is directly used together with the thermostat under the rotary viscometer or taken out for use after the temperature is stable. The former can introduce measurement errors due to vibration and position instability of the thermostat, and the latter can introduce measurement errors due to temperature fluctuation of the transfer viscosity liquid. In the verification and calibration process, the series of transfer viscosity liquid needs to be contained by a container with a fixed size, and a rotor immersed in the transfer viscosity liquid needs to be perpendicular to the container, because the gap flow state influences the viscosity measurement value in the rotational viscometer test process, and the non-perpendicularity of the rotor and the container can destroy the gap flow state and introduce measurement errors. The rotary viscometer is provided with a horizontal bubble meter to ensure the rotor to be vertical, and whether the container is vertical or not is often judged by naked eyes. In addition, the verification and calibration of the rotational viscometer are required to be matched with various brands of transfer viscosity liquid in turn, the traditional method is to keep the temperature one by one or adopt a plurality of thermostats to cause discontinuous constant temperature which is difficult to avoid the transfer viscosity liquid, the temperature stability is not guaranteed, the constant temperature is long in time consumption, and the working efficiency is low. Besides, because the rotary viscometer manufacturers and specifications are different, the mounting support frames are various, frequent replacement is needed in the verification and calibration process, repeated verification and calibration are carried out for a plurality of times, and the method is heavy and complicated, and is inevitably influenced by human factors. In the verification and calibration process of the rotary viscometer, a temperature control constant temperature tank is required to be adopted to carry out water bath constant temperature on a rotor outer cylinder, a heat preservation sleeve or a sample tray and a rotor receiver. In the traditional verification and calibration method, the instrument is independent of the Shan Yuantong rotary viscometer and the outer cylinder rotary viscometer, so that the equipment cost is increased. Therefore, a simple, efficient and accurate calibration scheme for the rotational viscometer verification is lacking.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a calibration device for the rotary viscometer and an operation method thereof, which solve the working procedures problems of long time consumption for constant temperature and heavy instrument operation and the like in the conventional calibration process of the rotary viscometer, and improve the calibration efficiency and the accuracy of the rotary viscometer.
In order to achieve the technical purpose, the invention adopts the following technical scheme: the utility model provides a verification calibrating device for rotational viscometer and operation method thereof, includes accuse constant temperature groove, three circulation loop, thermostat bath, multi-functional locating support, rotor urceolus group, rotor insulation cover group, double-deck test bench and data processing system, thermostat bath is bilayer structure, and inside sets up temperature sensor, and upper portion sets up the level bubble appearance, series connection between thermostat bath group is first circulation loop through shunt valve, flow control valve and accuse constant temperature groove conduction, adopts multi-functional locating support to support rotational viscometer, cooperates thermostat bath group lower part elevating platform to carry out the verification calibration of rotational viscometer. The multifunctional positioning support can support various specifications and models of rotary viscosimeters, the rotary viscosimeters are parallelly moved to the target position at the upper end of the constant-temperature water bath through the movable guide rail at the bottom of the support, the constant-temperature water bath group is used for containing corresponding brands of transfer viscosity liquid and is arranged on the upper part of the lifting table, the target position of the viscosity transfer liquid can be immersed in a rotor through the lifting table in a fine-adjustment manner, the rotor outer cylinder group and the rotor heat preservation sleeve group of the rotary viscosimeter containing the rotor outer cylinder or the heat preservation sleeve are serially connected with the temperature control constant-temperature groove through the flow dividing valve and the flow control valve to form a second circulation loop, the third circulation loop of the device is used for verification and calibration of the rotary viscosimeter containing the sample disc and the rotor receiver, the three circulation loops are reasonably arranged on the double-layer test table, the temperature control constant-temperature groove is separated from the double-layer test table, and corresponding reports are automatically generated through the data processing system.
Further, the temperature control water bath set for calibrating the rotary viscometer in the first circulation loop, the rotor outer cylinder set or the heat insulation sleeve set for the rotary viscometer in the second circulation loop, the sample tray of the rotary viscometer in the third circulation loop and the rotor receiver form three circulation loops which are connected in parallel through the flow dividing valve and the flow control valve and are communicated with the temperature control constant temperature tank, the reversing is realized through the flow dividing valve, the flow control valve controls the flow velocity, and the single-channel conduction or the simultaneous conduction constant temperature can be realized during the working.
Further, the constant-temperature water bath pot group in the first circulation loop is made of double-layer stainless steel, water baths flow between the inner wall and the outer wall of the constant-temperature water bath pot group for keeping constant temperature of the inner groove, a horizontal bubble instrument is arranged on the upper portion of the constant-temperature water bath pot group for detecting the perpendicularity of the constant-temperature water bath pot, and a temperature probe is arranged at the bottom of the inner groove of the constant-temperature water bath pot for monitoring the transmission viscosity liquid.
Further, the upper and lower positions of the lifting table at the lower part of the constant-temperature water bath set can be finely adjusted to ensure that the rotor is immersed in the transfer viscosity liquid to be accurate, and the bottom of the lifting table is provided with a foot capable of freely adjusting the height to adjust the horizontal position and matched with the upper horizontal bubble instrument to ensure the verticality of the constant-temperature water bath.
Further, the multifunctional positioning bracket is composed of a connector, a supporting rod and a driving motor, wherein the connector is of a multi-specification connecting bolt hole design and provided with a locking clamping hole structure, one side of the connector is of a multi-specification connecting bolt hole, the other side of the connector is of a locking clamping hole, and the connector is driven by the driving motor and can lift on the supporting rod of the positioning bracket.
Further, the support rod base of the multifunctional positioning support is linked to the bottom movable guide rail, and the multifunctional positioning support can move freely through the movable guide rail to position the rotary viscometer to be calibrated to the upper end of the target constant-temperature water bath kettle.
Further, the double-layer test bed is made of vibration-resistant materials, three holes are formed in the outer surface of the double-layer test bed, and a constant-temperature water bath placing port is formed between the upper layer and the lower layer of the double-layer test bed.
Further, the movable guide rail is arranged on the upper layer of the double-layer test bed and right behind the position of the constant-temperature water bath kettle set, corresponds to the position of the constant-temperature water bath kettle set, and is arranged on the lower layer of the double-side test bed, and the temperature display is arranged on the right front side of the double-layer test bed.
A method of operation employing a rotational viscometer assay calibration device as described above, comprising: when the conventional single-cylinder rotary viscometer and the external cylinder rotary viscometer are calibrated, the diverter valve is switched, the flow control valve is regulated to conduct the first circulation loop, the proper grade of transfer viscosity liquid is filled into the corresponding constant-temperature water bath kettle group according to the grade, the temperature is kept constant to the calibration point temperature, the measurement head of the rotary viscometer to be calibrated is arranged on the connecting head of the multifunctional positioning bracket, the rotor is arranged, the multifunctional positioning bracket moves to the upper end of the target constant-temperature water bath kettle through the moving guide rail, the driving motor drives the connecting head to lift so that the rotor on the instrument measurement head is immersed in the target depth of the transfer viscosity liquid in the constant-temperature water bath kettle, the height of the lifting platform bottom is regulated to the level of the horizontal bubbles of the constant-temperature water bath kettle, and the height of the lifting platform can be finely regulated if necessary. After the calibration point is finished, the measuring head is lifted, the rotor is dismounted, cleaned and reinstalled, the device is moved to the upper end position of another target constant temperature water bath kettle, the device is repeated to the calibration end, the coaxial cylinder internal rotation viscometer and the small rotor single cylinder rotation viscometer with the heat preservation sleeve are subjected to calibration, the flow dividing valve is switched, the flow control valve is regulated to conduct the second circulation loop, the proper grade of transmission viscosity liquid is added into the rotor outer cylinder group or the heat preservation sleeve group, the temperature is kept constant to the calibration point temperature, the corresponding rotor outer cylinder group or the heat preservation sleeve group is installed to the corresponding position of the rotation viscometer for calibration, the cone/plate-type viscometer, the special small rotor single cylinder rotation viscometer and the like are subjected to calibration, the instrument sample disc and the special small rotor single cylinder rotation viscometer are connected to the third circulation loop in series under the closing state of the third circulation loop, the flow control valve is regulated to conduct the third circulation loop, the proper grade of transmission viscosity liquid is filled into the sample disc or the adapter, and the calibration is carried out at the constant temperature to the calibration point temperature. Inputting experimental data, and automatically processing to generate a corresponding report.
Further, the third circulation loop can be adopted to detect the viscosity of the sample, a rotary viscometer and a proper matched rotor are selected, a rotor receiver of the rotary viscometer is connected to the third circulation loop in series in the closed state of the third circulation loop, a flow dividing valve is switched, a flow control valve is regulated to conduct the third circulation loop, the sample to be detected is added into the rotor receiver, and the temperature is kept constant until reaching the temperature of the detection point, and then the detection is carried out.
Further, when the actual verification and calibration process is carried out, if the ambient temperature is higher than the verification and calibration temperature, the set temperature of the temperature control constant temperature tank is slightly lower than the target temperature; if the ambient temperature is lower than the calibration temperature, the set temperature of the temperature control thermostatic bath should be slightly higher than the target temperature.
Further, each constant-temperature water bath pot can be correspondingly fixed to transfer the viscosity liquid mark to avoid cleaning or seal the constant-temperature water bath pot when liquid is filled.
Compared with the prior art, the invention has the beneficial effects that:
1. adopt the water bath with constant temperature group to with water bath with constant temperature group, rotor urceolus group, heat preservation cover group and sample dish, rotor receiver direct with accuse constant temperature groove switch on, guaranteed effectively that the continuation of transmission viscosity liquid temperature is stable, can realize the real-time supervision of transmission viscosity liquid temperature, can audio-visual regulation monitoring water bath with constant temperature and instrument rotor between verticality, reduce experimental error.
2. The three circulation loops of the calibrating device for the rotary viscometer are in parallel modularized independent design and are respectively used for calibrating and calibrating the rotary viscometer with different specifications and models, the working procedures are orderly simplified, the working rooms are not interfered with each other, the influence of human factors is reduced to the maximum extent, and the efficiency is improved.
3. By adopting the multifunctional positioning support and designing the movable guide rail, the support of various to-be-calibrated rotary viscosimeters can be realized by only one part of the support, and the problems that the rotary viscosimeter support frame is various in variety and needs to be frequently and heavy to carry are solved. The verification and calibration device of the rotary viscometer and the operation method thereof can complete verification and calibration work of the rotary viscometer in an orderly and high-efficiency and high-accuracy manner.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the thermostatic water bath of the present invention;
FIG. 3 is a schematic view of a multifunctional bracket and a guide rail thereof according to the present invention;
FIG. 4 is a schematic diagram of the method of operation of the present invention;
FIG. 5 is a diagram illustrating an example of an automatically generated calibration results page in accordance with the present invention;
in the figure: 1. a temperature control constant temperature tank; 2. a diverter valve; 3. a first circulation loop; 4. a second circulation loop; 5. a third circulation loop; 6. a flow control valve; 7. a constant temperature water bath kettle; 8. a temperature sensor; 9. a horizontal bubble meter; 10. delivering a viscosity liquid; 11. a lifting table; 12. freely adjusting the height foot; 13. multifunctional positioning support; 14. a connector; 15. a support rod; 16. a driving motor; 17. a moving guide rail; 18. a plurality of specifications of connecting bolt holes; 19. locking the clamping hole; 20. a rotor outer cylinder group; 21. a rotor insulation sleeve group; 22. a double-layer test bed; 23. a temperature display.
Detailed Description
The invention is further elucidated below in connection with specific embodiments and with the accompanying drawing.
As shown in fig. 1, the invention provides a verification calibration device for a rotational viscometer, which comprises three circulation loops, wherein the three circulation loops are driven by a temperature control and constant temperature groove 1, are divided into a first circulation loop 3, a second circulation loop 4 and a third circulation loop 5 through two flow dividing valves 2, and are subjected to flow control by a flow controller 6, wherein the temperature control and constant temperature groove 1 is used as a heating and refrigerating circulator, and the precision is not lower than 0.05 ℃ so as to meet the constant temperature of a transmission viscosity liquid 10. When in operation, the three circulation loops can be used in single-channel operation or in simultaneous conduction.
The first circulation loop 3 is formed by connecting a plurality of constant-temperature water baths 7 in series, the constant-temperature water baths 7 are of double-layer structures as shown in fig. 2, stainless steel materials are adopted, water baths flow between two walls of an inner tank and an outer tank for constant temperature of the inner tank, temperature sensors 8 are arranged at the bottoms of the inner tanks of the constant-temperature water baths 7, and a horizontal bubble meter 9 is arranged at the upper ends of the constant-temperature water baths 7. The constant temperature water bath 7 contains viscosity liquid 10 with corresponding brands, the lower part is a lifting table 11, and the bottom of the lifting table 11 is provided with a free height adjusting foot 12. Wherein, the constant-temperature water bath kettle 7 has two sizes, and the small size is 60mm in inner diameter, 80mm in outer diameter and 130mm in height; the large size is 86mm in inner diameter, 106mm in outer diameter and 130mm in height.
As shown in fig. 3, the multifunctional positioning bracket 13 is composed of a connector 14, a supporting rod 15 and a driving motor 16, and the bottom of the bracket is linked with a movable guide rail 17 for supporting various specifications and models of rotational viscometers. The connecting head 14 is designed for a multi-specification connecting bolt hole 18 and is provided with a locking clamp hole 19, the right side of the connecting head 14 is provided with the multi-specification connecting bolt holes 18 which are arranged in parallel and are composed of M4, M6 and M8 specification nuts and matched bolts, and the left side is provided with the locking clamp hole 19.
The second circulation loop 4 is formed by connecting a rotor outer cylinder group 20 of the rotary viscometer, a rotor insulation sleeve group 21 and the temperature control and constant temperature tank 1 in series. The rotor outer cylinder and the rotor insulation sleeve for measuring the viscosity of the rotational viscometer are fixed in size and can be collected completely.
The third circulation loop 5 is used for connecting a rotary viscometer with a sample disk and a rotor receiver.
The three circulation loops are reasonably arranged on the double-layer test bed 22, and the temperature control constant temperature tank 1 is separated from the double-layer test bed 22, so that the influence of vibration on verification and calibration results is avoided. The double-layer test stand 22 is made of vibration-resistant materials, openings are formed in the left side, the right side and the upper side, and a constant-temperature water bath placing opening is formed between the upper layer and the lower layer of the left side of the test stand. The movable guide rail 17 is arranged on the upper layer of the double-layer test stand 22 and right behind the position of the constant-temperature water bath set, and corresponds to the position of the constant-temperature water bath set. The constant-temperature water bath set, the lifting table 11, the temperature control circulation loop and the temperature sensing circuit are arranged on the lower layer of the double-layer test table 22, and the temperature display 23 is arranged on the right front side of the double-layer test table 22.
The conventional single-cylinder rotary viscometer and the outer-cylinder rotary viscometer adopt a first circulation loop 3, the coaxial cylinder internal rotation viscometer and the small-rotor single-cylinder rotary viscometer with a heat preservation sleeve adopt a second circulation loop 4, and the cone/plate viscometer and the special small-rotor single-cylinder rotary viscometer adopt a third circulation loop 5.
The invention also provides an operation method for performing rotational viscometer verification and calibration by using the rotational viscometer verification and calibration device. When the conventional single-cylinder rotary viscometer and the external cylinder rotary viscometer are calibrated, the diverter valve 2 is switched, the flow control valve 6 is regulated, the first circulation loop 3 is conducted, the appropriate brand of transfer viscosity liquid 10 is filled into the corresponding constant-temperature water bath 7 according to the brand, the temperature is kept to the temperature of the calibration point, the calibration rotary viscometer measuring head to be calibrated is arranged on the connector 14 of the multifunctional positioning bracket 13, the instrument rotor is arranged, the multifunctional positioning bracket 13 moves to the upper end of the target constant-temperature water bath 7 through the movable guide rail 17, the connector 14 is driven by the driving motor 16 to drive the rotary viscometer measuring head to rise and fall on the supporting rod 15 until the rotor is immersed into the constant-temperature water bath 7 to transfer the viscosity liquid 10 to the target depth, and the height of the lifting table 11 can be matched when necessary. The height foot 12 is freely adjusted to the level of the constant-temperature water bath level bubble instrument 9 by adjusting the bottom of the lifting table 11. After the verification and calibration point is finished, the measuring head is lifted, the rotor is dismounted, cleaned and reinstalled, and the measuring head is moved to the upper end position of the other target constant temperature water bath 7, so that the measuring head is repeated until the verification and calibration is finished. The verification and calibration of the rotary viscometer such as the coaxial cylinder internal rotation viscometer and the small rotor single cylinder rotary viscometer with the heat preservation sleeve and the like with the rotor outer cylinder or the heat preservation sleeve adopts a second group of circulation loops 4, the transfer viscosity liquid 10 is added into the rotor outer cylinder group 20 or the rotor heat preservation sleeve group 21, the flow control valve 2 is switched, the flow control valve 6 is regulated to conduct the second circulation loop 4, after the temperature is kept constant to the verification and calibration point temperature, the corresponding rotor outer cylinder group 20 or the rotor heat preservation sleeve group 21 is installed to the corresponding position of the rotary viscometer for measurement. In addition, the cone/plate type viscometer, the special small rotor single cylinder rotary viscometer and the like comprise a rotor sample disc and a rotor receiver, the instrument sample disc and the receiver are connected in series to the third circulation loop 5 in the closed state of the third circulation loop 5, the flow dividing valve 2 is switched, the flow control valve 6 is regulated to conduct the third circulation loop 5, the proper grade of the transmission viscosity liquid 10 is filled into the sample disc or the receiver, and the temperature is maintained to the temperature of a verification and calibration point for verification and calibration.
Inputting experimental data, and automatically processing to generate a corresponding report.
Specifically, different types of rotational viscometers are provided with different numbers of rotors, the rotational viscometer rotors have different measuring ranges at different rotating speeds, proper transmission viscosity liquid 10 is selected according to the model number of the rotational viscometer and the number of a pre-detected calibration rotor and JJG1002 rotational viscometer verification rules, and verification calibration is carried out at different rotating speeds. As shown in FIG. 5, for the example of generating a calibration report result page according to the invention, 8 rows of cells are reserved, calibration of rotor number and rotation speed 8 sets of coordination can be completed, for example, an NDJ-5 rotational viscometer comprises rotors 1, 2, 3 and 4, repeated measurement is carried out for 3 times under the coordination of rotor number and rotation speed of each set of rotors to calculate average indication value, the measurement result is expressed by relative error, and calibration of a plurality of rotors under a plurality of rotation speeds can be completed. When the number of rotor and the number of rotation speed matching groups are smaller than the number of reserved cell lines, the following macro code is adopted to hide redundant rows of blank cells.
Sub WAN（）
Dim row1 As Integer
With Worksheets（"Sheet1"）.Range（"#XX：#YY"）
Rows ("XX: YY"). EntireRow. Hidden=false' initialization unhidden
Set c = .Find（""， LookIn：=xlValues）
If Not c Is Nothing Then
firstaddress = c.Address
Do
row1 = c.Row
ActiveSheet.Rows（row1）.EntireRow.Hidden = True
Set c = .FindNext（c）
On Error Resume Next
Loop While Not c Is Nothing And c.Address <> firstaddress
End If
End With
End Sub
The method further comprises the steps of carrying out detection of sample viscosity, adopting a third circulation loop 5, selecting a rotary viscometer and a proper matched rotor, connecting a rotor receiver of the rotary viscometer to the third circulation loop 5 in series under the closing state of the third circulation loop 5, adjusting two flow dividing valves 2 and a flow control valve 6 to conduct the third circulation loop 5, adding a sample to be detected into the rotor receiver, and detecting after the temperature is kept constant to a detection temperature point.
The method also comprises the step that when the ambient temperature is higher than the verification and calibration temperature, the set temperature of the temperature control constant temperature tank is slightly lower than the target temperature by 0.05 ℃; when the ambient temperature is lower than the verification calibration temperature, the set temperature of the temperature control thermostatic bath is slightly higher than the target temperature by 0.05 ℃.
And the constant-temperature water bath device also comprises a step of correspondingly fixing and transmitting the 10 marks of the viscosity liquid to each constant-temperature water bath kettle during liquid filling so as to avoid cleaning or sealing the constant-temperature water bath kettle.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A verification calibration device for a rotational viscometer, characterized by: the device comprises a temperature control constant temperature tank (1), a first circulation loop, a second circulation loop, a third circulation loop, a constant temperature water bath (7), a multifunctional positioning bracket (13), a rotor outer cylinder group (20), a rotor heat preservation sleeve group (21), a double-layer test stand (22) and a data processing system, wherein the constant temperature water bath (7) is of a double-layer structure, a temperature sensor (8) is arranged in the constant temperature water bath, and a horizontal bubble instrument (9) is arranged at the upper part of the constant temperature water bath;
the device is characterized in that the constant temperature water bath (7) is connected in series with each other through a flow dividing valve (2) and a flow control valve (6) and a constant temperature control groove (1) to form a first circulation loop (3), the first circulation loop is used for calibrating a Shan Yuantong rotary viscometer and an outer cylinder rotary viscometer, a multifunctional positioning bracket (13) is used for supporting the rotary viscometer, the rotary viscometer is matched with a lifting table (11) at the lower part of the constant temperature water bath group to calibrate, the multifunctional positioning bracket (13) can support the rotary viscometer in various specifications, the constant temperature water bath group moves to the upper end target position of the constant temperature water bath (7) through a movable guide rail (17) at the bottom of the bracket, the constant temperature water bath (7) group contains corresponding brand-number transmission viscosity liquid (10) and is arranged at the upper part of the lifting table (11), and the target position of the rotor immersed viscosity transmission liquid can be finely adjusted through the lifting table (11).
A rotor outer cylinder group (20) and a rotor heat preservation sleeve group (21) of a rotary viscometer with a rotor outer cylinder or a heat preservation sleeve are connected in series with a temperature control constant temperature tank (1) through a flow dividing valve (2) and a flow control valve (6) to form a second circulation loop (4), and the second circulation loop is used for calibrating the rotary viscometer in a coaxial cylinder and a small rotor single cylinder rotary viscometer with a heat preservation sleeve, and the rotor outer cylinder group (20) or the rotor heat preservation sleeve group (21) is internally provided with a proper grade of transmission viscosity liquid;
the third circulation loop (5) of the device is used for detecting and calibrating a rotational viscometer comprising a sample disk and a rotor receiver, and the sample disk or the receiver is filled with a proper brand of transmission viscosity liquid (10);
three circulation loops are reasonably arranged on a double-layer test bed (22), the temperature control and constant temperature tank (1) is separated from the double-layer test bed (22), and corresponding reports are automatically generated through a data processing system;
the three circulation loops consisting of the sample disc of the rotary viscometer and the rotor receiver in the first circulation loop (3), the rotor outer barrel group (20) of the rotary viscometer in the second circulation loop (4) and the rotor insulation sleeve group (21) are connected in parallel through the flow dividing valve (2) and the flow control valve (6) to be communicated with the constant temperature control groove (1), reversing is realized through the flow dividing valve (2), the flow control valve (6) controls the flow speed, and the constant temperature can be conducted in a single channel or simultaneously during operation.
2. A verification calibration device for a rotational viscometer according to claim 1, wherein: the constant-temperature water bath (7) in the first circulation loop (3) is made of double-layer stainless steel, water baths flow through the space between the inner wall and the outer wall of the constant-temperature water bath (7), a horizontal bubble instrument (9) is arranged on the upper portion of the constant-temperature water bath (7), and a temperature probe is arranged at the bottom of the inner groove of the constant-temperature water bath (7).
3. A verification calibration device for a rotational viscometer according to claim 1, wherein: the lifting table (11) at the lower part of the constant-temperature water bath pot (7) can be finely adjusted to the upper and lower positions, and the bottom of the constant-temperature water bath pot is provided with a foot (12) capable of freely adjusting the height so as to adjust the horizontal position.
4. A verification calibration device for a rotational viscometer according to claim 1, wherein: the multifunctional positioning support (13) is composed of a connector (14), a support rod (15) and a driving motor (16), wherein the connector (14) is designed for a multi-specification connecting bolt hole (18) and provided with a locking clamping hole (19), one side of the connector (14) is provided with the multi-specification connecting bolt hole (18), the other side of the connector (14) is provided with the locking clamping hole (19), and the connector (14) is driven by the driving motor (16) to be lifted on the support rod (15) of the positioning support.
5. A verification calibration device for a rotational viscometer according to claim 1, wherein: the base of the supporting rod (15) of the multifunctional positioning bracket (13) is linked to the bottom movable guide rail (17), and the multifunctional positioning bracket (13) can move freely through the movable guide rail (17) to position the rotary viscometer to be calibrated to the upper end of the target constant-temperature water bath (7).
6. A verification calibration device for a rotational viscometer according to claim 1, wherein: the double-layer test stand (22) is made of vibration-resistant materials, three holes are formed in the outer surface of the double-layer test stand, and a constant-temperature water bath pot (7) placing port is formed between the upper layer and the lower layer of one side of the double-layer test stand (22).
7. A verification calibration device for a rotational viscometer according to claim 1, wherein: the movable guide rail (17) is arranged on the upper layer of the double-layer test bed (22) and is positioned right behind the position of the constant-temperature water bath pot (7), the position of the movable guide rail corresponds to the position of the constant-temperature water bath pot (7), the constant-temperature water bath pot (7) and the lifting table (11), the temperature control circulation loop and the temperature sensing circuit are arranged on the lower layer of the double-layer test bed (22), and the temperature display (23) is arranged on the right front side of the double-layer test bed (22).
8. A method of operating a verification calibration apparatus for a rotational viscometer in accordance with any one of claims 1 to 7, wherein: the operation method comprises the following steps that when the single-cylinder rotary viscometer and the outer cylinder rotary viscometer are used for calibrating, a diverter valve (2) is switched, a flow control valve (6) is regulated to conduct a first circulation loop (3), a proper grade of transfer viscosity liquid (10) is filled into a corresponding constant-temperature water bath pot (7) according to the grade, the temperature is kept constant to a calibrating point temperature, a measuring head of the rotary viscometer to be calibrated is arranged on a connector (14) of a multifunctional positioning bracket (13), a rotor is arranged, the multifunctional positioning bracket (13) moves to the upper end of a target constant-temperature water bath pot (7) through a movable guide rail (17), a driving motor (16) drives the connector (14) to lift, so that the rotor on the measuring head of the rotary viscometer is immersed into the target depth of the constant-temperature water bath pot (7) to transfer viscosity liquid (10), the bottom of a lifting table (11) is regulated to freely adjust the level of a horizontal bubble of the constant-temperature water bath pot (7), the height of the lifting table (11) can be regulated, after the calibrating point is finished, the measuring head is detached, cleaned and reinstalled to the other target constant-temperature is kept constant to the upper end of the constant-temperature water bath pot (7), and calibration is repeated;
when the coaxial cylinder internal rotation type rotary viscometer and the small rotor single cylinder rotary viscometer with the heat preservation sleeve are calibrated, the flow dividing valve (2) is switched, the flow control valve (6) is regulated to conduct the second circulation loop (4), the proper grade of the transmission viscosity liquid (10) is added into the rotor outer cylinder group (20) or the rotor heat preservation sleeve group (21), the temperature is kept to the temperature of the calibration point, and the corresponding rotor outer cylinder group (20) or the rotor heat preservation sleeve group (21) is installed to the corresponding position of the rotary viscometer and then calibrated;
when the rotational viscometer comprising a sample disk and a rotor receiver is calibrated, the instrument sample disk and the receiver are connected in series to the third circulation loop (5) in the state that the third circulation loop (5) is closed, a diverter valve (2) is switched, a flow control valve (6) is regulated to conduct the third circulation loop (5), a proper grade of transfer viscosity liquid (10) is filled into the sample disk or the receiver, the temperature is kept constant to the temperature of a calibration point, then the calibration is carried out, experimental data is input, and corresponding reports are generated through automatic processing.
9. The method of operation of claim 8, wherein: the method comprises the steps of detecting the viscosity of a sample, adopting a third circulation loop (5), selecting a rotary viscometer and a proper matched rotor, connecting a rotor receiver of the rotary viscometer to the third circulation loop (5) in series, switching a flow dividing valve (2), adjusting a flow control valve (6) to enable the third circulation loop (5) to be conducted, adding the sample to be detected to the rotor receiver, detecting after the sample is constant temperature to a detection temperature point, and setting the temperature of a temperature control constant temperature tank (1) to be slightly less than a target temperature when the ambient temperature is higher than verification and calibration temperature; when the ambient temperature is lower than the verification and calibration temperature, the set temperature of the temperature control constant temperature tank (1) is slightly higher than the target temperature, and the temperature control constant temperature tank further comprises a step of enabling each constant temperature water bath (7) to be correspondingly fixed and transferred with the marks of the viscosity liquid (10) to avoid cleaning or sealing the constant temperature water bath (7) during liquid filling.
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