Rotary viscometer calibrating device

Abstract

The utility model belongs to the field of measurement and metering science, and relates to a rotary viscometer calibrating device which comprises a computer control system arranged at the upper part of a height-adjustable bracket, a constant-temperature device and a pair of constant-temperature tanks arranged front and back, an outer cylinder is placed in the constant-temperature tanks, and a viscosity standard substance is filled in the outer cylinder; the camera is rotatably mounted in front of the computer control system, the rotary viscometer is mounted above the constant-temperature tank at the rear end, the constant-temperature tank is of a cavity structure with openings in the middle and the upper portion, the upper opening of the outer cylinder and the upper opening of the constant-temperature tank are sealed through a sealing cover, and the side wall and the bottom of the constant-temperature tank are of a double-layer sealing structure. And constant-temperature water is filled in the double-layer sealing structure of the side wall. According to the utility model, display interface images of the rotary viscometer are automatically obtained through the camera, and data are read and calculated in real time, so that the working efficiency is improved, and errors caused by personnel operation are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of measurement and metrology science and technology, and relates to a rotational viscometer calibration device, which is used for the calibration of the rotational viscometer. Background Art

[0002] Rotational viscometers are easy to operate, fast to measure, and have a wide range of applications. They are often used to measure the dynamic viscosity of fluids such as grease, adhesives, paints, coatings, plastics, foods, drugs, and lithium battery slurries, and are widely used in the production and processing industries. The working principle of a rotational viscometer is that when objects immersed in a fluid (such as cylinders, cones, circular plates, balls, and other rigid bodies) rotate, or when these objects are stationary and the surrounding fluid rotates, these objects will be affected by the viscous torque of the fluid. The magnitude of the viscous torque is proportional to the viscosity of the fluid. The viscosity of the fluid is obtained by measuring the viscous torque and the rotational speed of the rotating body.

[0003] There are many types of rotational viscometers, but their basic components include the following five parts: a sensing system, which is a component directly immersed in the fluid to sense the viscous torque, and the main component is the rotational viscometer rotor; a driving system, which is a power system that rotates the sensing system; a torque system, which is a system for transmitting and balancing the viscous torque; a torque (or speed) measuring system, which is a system for measuring the viscous torque or the rotational speed; and a display interface, which displays the viscosity measurement results, the rotational viscometer rotor used, and its speed information.

[0004] Rotational viscometers are widely used. According to JJG 1002-2005 "Verification Procedure for Rotational Viscometers", rotational viscometers need to be verified / calibrated regularly. The verification / calibration device of the rotational viscometer includes a temperature measuring device, a constant temperature device and an outer cylinder. The verification method of the rotational viscometer is to use a constant temperature device to keep the outer cylinder constant temperature, pour the viscosity standard material into the outer cylinder to keep the temperature constant, put the temperature sensing probe of the temperature measuring device into the viscosity standard material, and adjust the position of the rotational viscometer after reaching the test temperature. The rotor of the rotational viscometer is installed on the rotational viscometer, and the rotor of the rotational viscometer is suspended directly above the viscosity standard material. The lifting part of the viscometer is adjusted, and the rotor of the rotational viscometer is slowly inserted into the appropriate position in the viscosity standard material as required. When the temperature of the constant temperature viscosity standard material reaches the verification temperature ±0.1℃, the rotational viscometer instrument is operated, the viscosity measurement results are manually read, the data is recorded and calculated according to the requirements of the regulations.

[0005] Factors that affect the calibration results of rotational viscometers include: ambient temperature, test temperature fluctuation, personnel operation, data reading time, etc. At present, the calibration of rotational viscometers is done manually, which requires the test personnel to have more professional knowledge and excellent operating skills, and to do a lot of repetitive work such as data recording and calculation, which has low work efficiency. In order to improve the calibration efficiency and accuracy, it is necessary to develop a calibration device for rotational viscometers. Utility Model Content

[0006] The utility model aims to solve the above technical problems and provides a rotational viscometer calibration device. The technical solution of the utility model adopts a modular design idea. The technical solution adopted by the utility model is as follows:

[0007] The rotary viscometer calibration device comprises a computer control system, a thermostat and a pair of thermostats arranged front and back, wherein the computer control system is fixedly installed on the upper part of a height-adjustable bracket, the computer control system is located at the rear side of the thermostat at the rear end, the camera is rotatably installed on the side front of the computer control system, the thermostat is a cavity structure with openings in the middle and the upper part, the side wall and the bottom of the thermostat are double-layer sealing structures, the sealing structure is filled with thermostat water, the middle and lower part of one side of the thermostat is connected to the lower part of one side of the sealing structure of the thermostat at the front end through a second pipeline, and the upper part of the other side of the sealing structure of the thermostat at the front end is connected to the thermostat at the rear end through a third pipeline. The lower part of one side of the sealing structure of the tank and the upper middle part of one side of the thermostatic device are connected to the upper part of the other side of the sealing structure of the thermostatic tank at the rear end through the first pipeline, the first pipeline has a water inlet hole near the thermostatic device, the second pipeline has a water outlet hole near the thermostatic device, the outer cylinder with an upper opening is placed in the cavity structure of the thermostatic tank, the viscosity standard material is filled in the outer cylinder, the upper opening of the outer cylinder and the upper opening of the thermostatic tank are sealed by a sealing cover, the lower ends of a pair of temperature measuring probes are inserted into the viscosity standard material of the outer cylinder at the rear end, the upper ends of the temperature measuring probes are electrically connected to the computer control system, and the rotational viscometer is fixedly installed above the thermostatic tank at the rear end.

[0008] Preferably, the camera is rotatably mounted on the front side of the computer control system via a mounting base, the mounting base includes a rotating shaft, a support plate and a rear shell, the rear shell is vertically fixedly connected to the side wall of the computer control system, the support plate is horizontally fixedly mounted on the middle and upper part of the rear shell, the rotating shaft is fixedly mounted on the front end of the lower surface of the support plate, and the camera is rotatably mounted on the rotating shaft.

[0009] Preferably, the computer control system includes a computer housing and a computer system in the computer housing, the computer housing includes a housing body, the housing body is mounted on a bracket via an optical axis fixing seat, a display screen assembly is arranged on the side of the housing body, and a USB extension cable and a switch are arranged below the display screen assembly.

[0010] Preferably, the computer system includes: an industrial computer mainboard, a screen fixing plate, a USB communication module and a power supply module.

[0011] The beneficial effects of the utility model are:

[0012] Two temperature measuring probes are used to measure the temperature of the viscosity standard material in real time to reduce the impact of temperature changes on the test results; the image of the rotational viscometer display interface is automatically acquired, and the data is read and calculated in real time, which improves work efficiency and reduces errors caused by human operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the overall structure of the verification device of the embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the detection part of the embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the control part of an embodiment of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the fixed structure part of the camera of the embodiment of the utility model;

[0018] Figure 5 It is a structural schematic diagram of a computer control system housing of an embodiment of the utility model;

[0019] Figure 6 It is a schematic diagram of the internal structure of the computer control system of the embodiment of the utility model.

[0020] In the figure, 1 is a computer control system, 2 is a camera, 3 is a bracket, 4 is a constant temperature device, 5 is a constant temperature tank, 6 is a temperature measuring probe, 7 is a water outlet, 8 is a water inlet, 9 is a sealing cover, 10 is an outer cylinder, 11 is a viscosity standard material, 12 is a rotational viscometer, 13 is a rotational viscometer rotor, 21 is a rotating shaft, 22 is a support plate, 23 is a back shell, 31 is a USB extension cable, 32 is a switch, 33 is a display screen assembly, 34 is an optical axis fixing seat, 41 is an industrial computer mainboard, 42 is a screen fixing plate, 43 is a USB communication module, and 44 is a power module. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] like Figure 1-3As shown, a rotational viscometer calibration device includes a computer control system 1, a constant temperature device 4 and a pair of constant temperature tanks 5 arranged in front and back. The computer control system 1 is fixedly installed on the upper part of a height-adjustable bracket 3, and a camera 2 is rotatably installed on the side front of the computer control system 1. The computer control system 1, the camera 2 and the bracket 3 constitute the control part of the automatic calibration device. The camera 2 is used to obtain the image of the display interface of the rotational viscometer 12 and transmit it to the computer control system 1, and the bracket 3 is used to support the computer control system 1. The thermostatic tank 5 is a cavity structure with openings in the middle and the upper part. The side wall and the bottom of the thermostatic tank 5 are double-layer sealed structures. The lower middle part of one side of the thermostatic device 4 is connected to the lower part of the sealing structure of the thermostatic tank 5 at the front end through the second pipeline. The upper part of the sealing structure of the thermostatic tank 5 at the front end is connected to the lower part of the sealing structure of the thermostatic tank 5 at the rear end through the third pipeline. The upper middle part of one side of the thermostatic device 4 is connected to the upper part of the sealing structure of the thermostatic tank 5 at the rear end through the first pipeline. The first pipeline is provided with a water inlet 8 near the thermostatic device 4, and the second pipeline is provided with a water outlet 7 near the thermostatic device 4. The outer cylinder 10 with an upper opening is placed in the cavity structure of the thermostatic tank 5. The viscosity standard material 11 is filled in the outer cylinder 10. The upper opening of the outer cylinder 10 and the upper opening of the thermostatic tank 5 are sealed by a sealing cover 9. The lower ends of a pair of temperature measuring probes 6 are inserted into the viscosity standard material 11 of the outer cylinder 10 at the rear end, and the upper ends of the temperature measuring probes 6 are electrically connected to the computer control system 1. The rotational viscometer 12 is fixedly installed above the thermostatic tank 5 at the rear end, and the lower end of the rotor 13 of the rotational viscometer is inserted into the viscosity standard material 11 of the outer cylinder 10 at the front end for pre-temperature control. During calibration, the rotor 13 of the rotational viscometer is installed on the rotational viscometer 12, and the lower end of the rotor 13 of the rotational viscometer is inserted into the viscosity standard material 11 of the outer cylinder 10 at the rear end for automatic calibration. The double-layer sealing structure of the thermostatic tank 5 is filled with thermostatic water, and the thermostatic water is circulated to achieve constant temperature, and the thermostatic device 4 is used for heating and heat preservation.

[0023] The camera 2 is rotatably mounted on the front upper side of the computer control system 1 through a mounting base. Figure 4As shown, the mounting base includes a rotating shaft 21, a supporting plate 22 and a rear shell 23. The rear shell 23 is vertically fixedly connected to the side wall of the computer control system 1. The supporting plate 22 is horizontally fixedly installed in the middle and upper part of the rear shell 23. The rotating shaft 21 is fixedly installed at the front end of the lower surface of the supporting plate 22. The camera 2 is rotatably installed on the rotating shaft 21. The design of the rotating shaft 21 allows the camera 2 to adjust its direction according to the different display interface positions of the rotational viscometer 12. The bracket 3 can adjust the height of the camera 2, thereby ensuring that the camera 2 can clearly record the display interface information of the rotational viscometer 12. The computer control system 1 is used to control the camera 2 and the temperature probe 6, read the real-time temperature of the temperature probe 6, and at the same time, the computer control system 1 will extract effective data from the image obtained by the camera 2 and store relevant data, and then display the calibration data of the rotational viscometer 12 on the screen of the computer control system 1.

[0024] The computer control system 1 includes a computer housing and a computer system in the computer housing, such as Figure 5 As shown, the computer housing includes a housing body, which is mounted on a bracket 3 through an optical axis fixing seat 34. A 7-inch display screen assembly 33 is arranged on the side of the housing body, and a USB extension cable 31 and a switch 32 are arranged below the display screen assembly 33. The computer control system 1 can store external data through the USB extension cable 31, and the computer control system 1 is independently powered and controlled. Figure 6 As shown, the computer system includes: an industrial computer motherboard 41, a screen fixing plate 42, a USB communication module 43 and a 5V power module 44. The industrial computer motherboard 41 is the core component of the computer system, and is designed with communication, control, storage and other functions. The screen fixing plate 42 is used to fix the display screen assembly 33. The 5V power module 44 is used to provide power for the camera 2. The USB communication module 43 is used to realize data communication between the camera 2 and the computer control system 1.

[0025] The method for using the aforementioned rotational viscometer calibration device comprises the following steps:

[0026] Turn on the camera 2, the rotational viscometer 12 and the computer control system 1, enter the operation interface of the computer control system 1, input the relevant information of the rotational viscometer 12 to be tested and the viscosity standard material 11 to be used in the computer control system 1, and the experimenter pours the viscosity standard material 11 into the outer cylinder 10, and then puts the outer cylinder 10 into the constant temperature tank 5 at the front end and the constant temperature tank 5 at the rear end to keep the temperature constant, covers the front end sealing cover 9, and puts the rotational viscometer rotor 13 in the front end outer cylinder 10 to keep the temperature constant, and the rotational viscometer rotor 13 can pass through the front end sealing cover 9. Cover the rear end sealing cover 9, and insert a pair of temperature measuring probes 6 through the rear end sealing cover 9 and insert them into different positions of the viscosity standard material 11. When the temperature of the viscosity standard substance 11 reaches the calibration temperature ±0.1°C, the computer control system 1 emits a prompt sound. When the temperature of the viscosity standard substance 11 remains at the calibration temperature ±0.1°C within ten minutes, the computer control system 1 gives a voice prompt to start the calibration. The experimenter takes out the rotational viscometer rotor 13 from the outer cylinder 10 at the front end, installs it on the rotational viscometer 12, and adjusts the height of the rotational viscometer 12 so that the rotational viscometer rotor 13 is immersed in the appropriate position of the viscosity standard substance 11 in the outer cylinder 10 at the rear end. Check whether the temperature displayed on the screen of the computer control system 1 is within the range of ±0.1°C of the calibration temperature. When the temperature reaches the range, run the rotational viscometer 12, and the rotational speed and viscosity measurement results are displayed on the display screen of the rotational viscometer 12. The camera 2 collects the data information on the display screen of the rotational viscometer 12 and transmits it to the computer control system 1 for data judgment and processing. After the data collection is completed, a prompt voice is issued to indicate that the first calibration is completed, and the experimenter stops running the rotational viscometer 12. Then, according to the requirements of the regulations, the rotational viscometer 12 is re-run, and the camera 2 collects the second measurement data. After the data collection is completed, the computer control system 1 synchronously counts the data of the two measurements. If the repeatability index required by the JJG 1002-2005 regulations is met, the automatic calibration device issues a prompt voice to indicate that the calibration of the first viscosity standard material 11 is completed. If the data of the two measurements do not meet the repeatability index required by the JJG 1002-2005 regulations, the automatic calibration device issues a prompt voice, and the experimenter needs to reinstall the rotational viscometer rotor 13 for calibration. After completing the verification of the first viscosity standard substance 11, replace it with another viscosity standard substance 11 for verification according to the JJG 1002-2005 regulations.

[0027] In the embodiments of the utility model, the technical features not described in detail are all existing technologies or conventional technical means and will not be described in detail here.

[0028] Finally, it should be noted that the above embodiments are only specific implementation methods of the present utility model, which are used to illustrate the technical solution of the present utility model, rather than to limit it, and the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any technician familiar with the technical field can modify the technical solution recorded in the above embodiments within the technical scope disclosed by the present utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the present utility model, and should be covered within the protection scope of the present utility model.

Claims

1. Rotational viscometer calibration device, characterized in that: The invention comprises a computer control system, a thermostatic device and a pair of thermostatic tanks arranged in front and back. The computer control system is fixedly installed on the upper part of a height-adjustable bracket, the computer control system is located at the rear side of the thermostatic tank at the rear end, the camera is rotatably installed on the side front of the computer control system, the thermostatic tank is a cavity structure with openings in the middle and the upper part, the side wall and the bottom of the thermostatic tank are double-layer sealing structures, the sealing structure is filled with thermostatic water, the middle and lower part of one side of the thermostatic device is connected to the lower part of one side of the sealing structure of the thermostatic tank at the front end through a second pipeline, and the upper part of the other side of the sealing structure of the thermostatic tank at the front end is connected to the sealing structure of the thermostatic tank at the rear end through a third pipeline. The lower part of one side of the thermostatic device, the upper middle part of one side of the thermostatic device is connected to the upper part of the other side of the sealing structure of the thermostatic tank at the rear end through the first pipeline, the first pipeline is provided with a water inlet hole near the thermostatic device, the second pipeline is provided with a water outlet hole near the thermostatic device, the outer cylinder with an upper opening is placed in the cavity structure of the thermostatic tank, the viscosity standard material is filled in the outer cylinder, the upper opening of the outer cylinder and the upper opening of the thermostatic tank are sealed by a sealing cover, the lower ends of a pair of temperature measuring probes are inserted into the viscosity standard material of the outer cylinder at the rear end, the upper ends of the temperature measuring probes are electrically connected to the computer control system, and the rotational viscometer is fixedly installed above the thermostatic tank at the rear end.

2. The rotational viscometer calibration device according to claim 1, characterized in that: The camera is rotatably mounted on the front side of the computer control system via a mounting base, the mounting base includes a rotating shaft, a support plate and a rear shell, the rear shell is vertically fixedly connected to the side wall of the computer control system, the support plate is horizontally fixedly mounted on the middle and upper part of the rear shell, the rotating shaft is fixedly mounted on the front end of the lower surface of the support plate, and the camera is rotatably mounted on the rotating shaft.

3. The rotational viscometer calibration device according to claim 1, characterized in that: The computer control system includes a computer housing and a computer system in the computer housing. The computer housing includes a housing body, which is mounted on a bracket via an optical axis fixing seat. A display screen assembly is arranged on the side of the housing body, and a USB extension cable and a switch are arranged below the display screen assembly.

4. The rotational viscometer calibration device according to claim 3, characterized in that: The computer system comprises: an industrial computer mainboard, a screen fixing plate, a USB communication module and a power supply module.

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