A variable temperature rotational viscometer
By designing a variable-temperature rotary viscometer with a combination of a detachable tank, a spiral heating coil, and a thermal oil heater, the problem of accuracy in fluid viscosity testing at high temperatures was solved, achieving efficient and uniform heating and heat preservation, and making it suitable for viscosity testing of high-temperature melts.
Patent Information
- Application Number
- CN202520680638.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Existing rotational viscometers cannot accurately measure the viscosity of fluids at high temperatures, especially the viscosity of polymer solids in the molten state at 150℃~200℃, and the uneven heating leads to inaccurate testing.
A variable-temperature rotary viscometer was designed, which adopts a combination structure of a detachable tank, a spiral heating coil and a heat transfer oil heater, combined with a stirring component and a lifting and rotating adjustment mechanism, to realize automatic and continuous testing of viscosity at different temperatures and speeds, and has efficient and uniform heating and heat preservation functions.
It achieves accurate viscosity testing at different temperatures and rotation speeds, is suitable for viscosity testing of high-temperature melts, and features uniform heating, excellent heat preservation, and convenient operation.
Smart Images
Figure CN224682034U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of resin testing technology, and in particular to a variable temperature rotational viscosity tester. Background Technology
[0002] Most existing rotational viscometers on the market can only test the viscosity of fluids at room temperature, or require an external small low-temperature heater. Such heating devices may result in uneven heating, leading to inaccurate viscosity measurements, and they also cannot test the viscosity of fluids at higher temperatures. For example, it is necessary to test the viscosity of polymer solids in their molten state at 150℃~200℃, which is crucial for understanding the state of polymers during high-temperature synthesis and setting process parameters.
[0003] Therefore, in order to solve the above problems, it is necessary to develop a variable temperature rotary viscometer that can automatically and continuously test the viscosity of the fluid under test at different temperatures and rotation speeds. It has the characteristics of efficient and uniform heating, good heat preservation effect, accurate viscosity test, and convenient operation, and is suitable for viscosity testing of high temperature melts. Utility Model Content
[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: A variable-temperature rotational viscosity tester, comprising a base, an instrument body, and a rotor, characterized in that: A base is provided above the base, and a heating chamber with the mounting opening facing upwards is provided on the base; The instrument body is located above the base. A touch screen is provided on the front of the instrument body, and a motor and control module are provided inside. A rotor connector that connects to the motor drive end is provided at the lower end of the instrument body. The instrument body is provided with a rotor that is detachably connected to the rotor connector at the bottom, and a temperature measuring head is provided on one side of the instrument body located on the rotor. The instrument body is connected to the base via a lifting and rotating adjustment mechanism, which is located on one side of the base. Therefore, a tank for holding the fluid to be measured is provided inside the heating chamber, and a heating component for heating and keeping the fluid to be measured inside the tank is provided between the heating chamber and the tank. An opening is provided in the upper center of the tank body, and the tank body is detachably connected to the heating chamber; The rotor and the end of the temperature measuring head away from the instrument body extend through the opening into the chamber of the tank; The control module is electrically connected to the heating component, temperature sensor, motor, and touch screen.
[0005] Preferably, the heating assembly includes a spiral heating coil and a heat-conducting oil heater connected to both ends of the spiral heating coil; The spiral heating coil is disposed between the inner wall of the heating chamber and the tank body, and the spiral heating coil is tightly fitted with the tank body with a clearance. The heat transfer oil heater is installed inside the machine base and is used to circulate and heat the heat transfer oil in the spiral heating coil.
[0006] Preferably, an insulation jacket is provided inside the base on the outside of the spiral heating coil.
[0007] Preferably, anti-scalding handles are provided on both sides of the upper surface of the can.
[0008] Preferably, it also includes a stirring assembly for stirring the fluid being tested inside the tank; The stirring assembly is electrically connected to the control module.
[0009] Preferably, the mixing assembly includes mixing blades, a coupling, and a mixing motor; The coupling is connected to the bottom of the tank; the stirring motor is located on the outside of the tank and connected to the base; The stirring blade is installed inside the tank. The blade shaft is connected to the drive shaft of the stirring motor via a coupling. The drive shaft of the stirring motor and the coupling can be disengaged and engaged.
[0010] Preferably, the rotor connector is engaged with the rotor rotation.
[0011] Preferably, the lifting and rotating adjustment mechanism includes a lifting rod, a lifting connecting seat, a main unit connecting rod, a lifting adjustment handwheel, and a main unit fixing handwheel; One end of the main unit connecting rod is connected to the instrument column, and the other end is slidably sleeved with the lifting connecting seat; One end of the lifting rod is connected to the base, and the other end is rotatably slidably connected to the lifting connecting seat. The lifting adjustment handwheel is threadedly connected to the lifting connecting seat, which is used to restrict the degree of freedom of the lifting connecting seat to rotate and move up and down relative to the lifting rod when locked. The main unit fixing handwheel is threadedly connected to the lifting connecting seat, which is used to limit the degree of freedom of the main unit connecting rod to slide relative to the lifting connecting seat when locked.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention can automatically and continuously test the viscosity of the fluid under test at different temperatures and rotation speeds. It features efficient and uniform heating, excellent heat preservation, accurate viscosity testing, and convenient operation, and is suitable for viscosity testing of high-temperature melts. Attached Figure Description
[0013] Figure 1 This is one of the structural schematic diagrams of this utility model; Figure 2This is the second structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the lifting and rotating adjustment mechanism in this utility model; Figure 4 This is a schematic diagram of the connection structure between the rotor and the rotor connector in this utility model; The components include: base 1, instrument body 2, rotor 3, machine base 4, touch screen 5, rotor connector 6, temperature measuring head 7, lifting and rotating adjustment mechanism 8, tank 9, heating component 10, heat insulation jacket 11, anti-scalding handle 12, stirring component 13, protrusion 31, heating chamber 41, mounting hole 61, guide groove 62, limit groove 63, lifting rod 81, lifting connecting seat 82, main unit connecting rod 83, lifting adjustment handwheel 84, main unit fixing handwheel 85, spiral heating coil 101, heat transfer oil heater 102, stirring blade 131, coupling 132, and stirring motor 133. Detailed Implementation
[0014] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.
[0015] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," "up," "down," "front," "back," and similar expressions used in this document are for illustrative purposes only.
[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figure 1-4 As shown, a variable temperature rotational viscosity tester includes a base 1, an instrument body 2 and a rotor 3. A base 4 is provided above the base 1, and a heating chamber 41 with the mounting opening facing upward is provided on the base 4. The instrument body 2 is located above the base 4. The front of the instrument body 2 is equipped with a touch screen 5, and the inside is equipped with a motor (not shown in the figure) and a control module (not shown in the figure). The lower end of the instrument body 2 is equipped with a rotor connector 6 that is connected to the motor drive end. The instrument body 2 is provided with a rotor 3 that is detachably connected to the rotor connector 6 below it, and a temperature measuring head 7 is provided on one side of the rotor 3 on the instrument body 2. The instrument body 2 is connected to the base 1 via a lifting and rotating adjustment mechanism 8, which is located on one side of the base 4. Therefore, a tank 9 for holding the fluid to be measured is provided inside the heating chamber 41, and a heating component 10 for heating and keeping the fluid to be measured inside the tank 9 is provided between the heating chamber 41 and the tank 9. An opening is provided in the upper center of the tank body 9, and the tank body 9 is detachably connected to the heating chamber 41; The rotor 3 and the temperature measuring head 7 extend from the end away from the instrument body 2 through the opening into the chamber of the tank 9; The control module is electrically connected to the heating component 10, the temperature measuring head 7, the motor, and the touch screen 5.
[0018] In this embodiment, the detachable tank 9 structure facilitates the removal of the tank 9 for cleaning and replacement of the fluid being tested inside. The combined heating chamber 41 and heating component 10 improve the heating efficiency and uniformity of the fluid being tested inside the tank 9, achieving long-term heat preservation of the fluid being tested, and providing a wide temperature testing range (from room temperature to 300°C). With the help of the temperature measuring head 7, touch screen 5, and control module, the viscosity of the fluid being tested can be automatically and continuously tested at different temperatures and speeds (e.g., testing once every 10°C at a set speed), thereby accurately testing the viscosity of the fluid being tested.
[0019] Working principle: The fluid to be tested is transferred into the tank 9, which is then placed into the heating chamber 41. The rotor 3 and temperature sensor 7 are then positioned within the tank 9 using a height adjustment mechanism. Parameters such as heating temperature and rotor speed are set via the touchscreen 5. First, the heating component 10 heats the fluid to the set temperature (during which the temperature sensor 7 monitors the fluid temperature in real-time to control the operation of the heating component 10). The working principle is as follows: The fluid to be tested is transferred into the tank 9, which is then placed into the heating chamber 41. The temperature is then displayed on the touchscreen 5. Different testing modes can also be selected, such as constant rotation speed, testing every 10°C, and automatically recording the corresponding viscosity values. Furthermore, for example... Figure 1 , 2As shown, in order to meet the requirements of testing the viscosity of the fluid at higher temperatures and to achieve efficient and uniform heating, the heating assembly 10 includes a spiral heating coil 101 and a heat-conducting oil heater 102 connected to both ends of the spiral heating coil 101. The spiral heating coil 101 is disposed between the inner wall of the heating chamber 41 and the tank 9, and the spiral heating coil 101 and the tank 9 are tightly fitted with a clearance. The heat transfer oil heater 102 is installed inside the base 4. The heat transfer heater is used to circulate and heat the heat transfer oil in the spiral heating coil 101.
[0020] Furthermore, such as Figure 1 , 2 As shown, in order to improve the long-term heat preservation effect on the fluid being tested, a heat preservation jacket 11 is provided inside the base 4 on the outside of the spiral heating coil 101.
[0021] Furthermore, such as Figure 1 As shown, in order to facilitate easy, safe and convenient handling of the can 9, anti-scalding handles 12 are provided on both sides of the upper surface of the can 9.
[0022] Furthermore, such as Figure 1 , 2 As shown, in order to improve the melting and heating rate of the high-temperature melt and to improve the heating uniformity, a stirring component 13 is also included to stir the fluid being tested inside the tank 9. The stirring assembly 13 is electrically connected to the control module.
[0023] In this embodiment, the stirring assembly 13 stops operating once the high-temperature melt has completely dissolved and reached the set temperature.
[0024] Furthermore, such as Figure 1 , 2 As shown, in order to achieve rotational drive of the stirring device inside the tank 9 when the tank 9 is separable, the stirring assembly 13 includes stirring blades 131, coupling 132 and stirring motor 133; The coupling 132 is connected to the bottom of the tank 9; the stirring motor 133 is located outside the tank 9 and is connected to the base 1. The stirring blade 131 is installed inside the tank body 9. The blade shaft of the stirring blade 131 is connected to the drive shaft of the stirring motor 133 through the coupling 132. The drive shaft of the stirring motor 133 and the coupling 132 can be disengaged and engaged.
[0025] Furthermore, such as Figure 4 As shown, in order to facilitate quick and easy assembly and disassembly of the rotor 3, the rotor connector 6 is rotatably engaged with the rotor 3.
[0026] In this embodiment, the rotor connector 6 is provided with a mounting hole 61 for connecting to the rotor 3. The mounting hole 61 is provided with an L-shaped groove extending from the end of the rotor connector 6 inward. The L-shaped groove includes a guide groove 62 and a limiting groove 63. The connecting end of the rotor 3 is provided with a protrusion 31 that mates with the L-shaped slot. During installation, as the rotor 3 is inserted into the mounting hole 61, the protrusion 31 moves along the guide groove 62 toward the limiting groove 63. After it is in place, the rotor 3 is rotated so that the protrusion 31 enters the guide groove 62 and then enters the limiting groove 63. Once rotated into place, the rotor 3 can be snapped onto the rotor connector 6. In addition, the direction in which the rotor 3 rotates into the limiting groove 63 is opposite to the direction of rotation of the rotor 3, so that the rotor 3 automatically locks with the rotor connector 6 during the rotation process.
[0027] Furthermore, such as Figure 1 , 2 As shown in Figure 3, in order to facilitate and quickly adjust the height and position of the instrument body 2, the lifting and rotating adjustment mechanism 8 includes a lifting rod 81, a lifting connecting seat 82, a main unit connecting rod 83, a lifting adjustment handwheel 84, and a main unit fixing handwheel 85. One end of the main unit connecting rod 83 is connected to the instrument column, and the other end is slidably sleeved with the lifting connecting seat 82; One end of the lifting rod 81 is connected to the base 1, and the other end is rotatably slidably connected to the lifting connecting seat 82; The lifting adjustment handwheel 84 is threadedly connected to the lifting connecting seat 82, and is used to limit the degree of freedom of the lifting connecting seat 82 to rotate and move up and down relative to the lifting rod 81 when locked. The main unit fixing handwheel 85 is threadedly connected to the lifting connecting seat 82, and is used to limit the degree of freedom of the main unit connecting rod 83 to slide relative to the lifting connecting seat 82 when locked.
[0028] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model patent.
Claims
1. A variable-temperature rotational viscosity tester, comprising a base, an instrument body, and a rotor, characterized in that: A base is provided above the base, and a heating chamber with the mounting opening facing upwards is provided on the base; The instrument body is located above the base. A touch screen is provided on the front of the instrument body, and a motor and control module are provided inside. A rotor connector that connects to the motor drive end is provided at the lower end of the instrument body. The instrument body is provided with a rotor that is detachably connected to the rotor connector at the bottom, and a temperature measuring head is provided on one side of the instrument body located on the rotor. The instrument body is connected to the base via a lifting and rotating adjustment mechanism, which is located on one side of the base. The heating chamber is equipped with a tank for holding the fluid to be tested, and a heating component for heating and keeping the fluid to be tested inside the tank is provided between the heating chamber and the tank. An opening is provided in the upper center of the tank body, and the tank body is detachably connected to the heating chamber; The rotor and the end of the temperature measuring head away from the instrument body extend through the opening into the chamber of the tank; The heating assembly includes a spiral heating coil and a heat transfer oil heater connected to both ends of the spiral heating coil; the spiral heating coil is disposed between the inner wall of the heating chamber and the tank body, and the spiral heating coil and the tank body are tightly fitted with a clearance; the heat transfer oil heater is disposed inside the machine base, and the heat transfer oil heater is used to circulate and heat the heat transfer oil in the spiral heating coil; An insulation jacket is provided inside the base on the outside of the spiral heating coil; It also includes a stirring assembly for agitating the fluid being tested inside the tank; The control module is electrically connected to the heating component, temperature sensor, motor, touch screen, and stirring component.
2. The variable-temperature rotational viscosity tester according to claim 1, characterized in that, The upper surface of the can is provided with anti-scalding handles on both sides.
3. The variable-temperature rotational viscosity tester according to claim 1, characterized in that, The stirring assembly includes stirring blades, a coupling, and a stirring motor; The coupling is connected to the bottom of the tank; the stirring motor is located on the outside of the tank and connected to the base; The stirring blade is installed inside the tank. The blade shaft is connected to the drive shaft of the stirring motor via a coupling. The drive shaft of the stirring motor and the coupling can be disengaged and engaged.
4. The variable-temperature rotational viscosity tester according to claim 1, characterized in that, The lifting and rotating adjustment mechanism includes a lifting rod, a lifting connecting seat, a main unit connecting rod, a lifting adjustment handwheel, and a main unit fixing handwheel; One end of the main unit connecting rod is connected to the instrument column, and the other end is slidably sleeved with the lifting connecting seat; One end of the lifting rod is connected to the base, and the other end is rotatably slidably connected to the lifting connecting seat. The lifting adjustment handwheel is threadedly connected to the lifting connecting seat, which is used to restrict the degree of freedom of the lifting connecting seat to rotate and move up and down relative to the lifting rod when locked. The main unit fixing handwheel is threadedly connected to the lifting connecting seat, which is used to limit the degree of freedom of the main unit connecting rod to slide relative to the lifting connecting seat when locked.
5. A variable-temperature rotational viscosity tester according to claim 1, characterized in that, The rotor connector is engaged with the rotor rotation.
6. A variable-temperature rotary viscometer according to claim 5, characterized in that, The rotor connector is provided with a mounting hole for connecting to the rotor. The mounting hole is provided with an L-shaped groove extending from the end of the rotor connector inward. The L-shaped groove includes a guide groove and a limiting groove. The connecting end of the rotor is provided with a protrusion that mates with the L-shaped slot; during installation, as the rotor is inserted into the mounting hole, the protrusion moves along the guide groove toward the limiting groove. After it is in place, the rotor is rotated to make the protrusion enter the limiting groove, and the rotor is then engaged with the rotor connector. The direction in which the rotor rotates into the limiting groove is opposite to the direction of rotor rotation, thereby automatically locking the rotor with the rotor connector during the rotation process.