A finishing device for a dynamic shear rheometer cone and plate fixture
By designing a double-blade dressing device and temperature control system that matches the conical plate clamp, the problem of the lack of dressing tools for the conical plate clamp was solved, achieving efficient and accurate sample dressing and ensuring the reliability and safety of test results.
Patent Information
- Application Number
- CN202522035218.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-22
AI Technical Summary
The lack of a dedicated sample trimming tool for the cone-plate clamp of a dynamic shear rheometer in the existing technology leads to sample overflow and adhesion during trimming, affecting the accuracy and repeatability of test results, especially for polymer-modified asphalt with high softening point and high viscosity.
A double-blade trimming device with a straight blade and an inclined blade was designed. The included angle between the blades matches the conical plate clamp. It is equipped with a heating device and a temperature control system to ensure efficient scraping of samples in a limited space, prevent spillage and adhesion, and provide multiple heating modes to adapt to different material requirements.
It significantly improves the quality and cleanliness of the finishing process, ensures the accuracy and reliability of rheological test results, avoids sample flow and aging problems caused by improper temperature, and enhances the safety and efficiency of the operation.
Smart Images
Figure CN224681906U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of road engineering material testing equipment, and more specifically, to a dressing device for a cone plate clamp of a dynamic shear rheometer. Background Technology
[0002] As a typical viscoelastic material, asphalt exhibits a significant temperature dependence in its rheological properties. At room temperature, asphalt is solid, gradually softening as the temperature increases. Road petroleum asphalt and polymer-modified asphalt are widely used materials in road construction. During testing in a dynamic shear rheometer, a cone-plate clamp is required for sample installation and testing.
[0003] Currently, dynamic shear rheometers are widely used for the viscoelastic evaluation of asphalt materials. These instruments are typically equipped with either a flat plate clamp or a conical plate clamp. Before testing, the asphalt sample must be placed between the upper and lower clamps. After the clamp gap is adjusted to the set value, any excess sample is trimmed. When using a flat plate clamp, the trimming space is relatively ample (approximately 1 cm), and specialized scraping tools can effectively complete the trimming operation.
[0004] like Figure 1 The diagram shows the structure of a conical clamp for an existing dynamic shear rheometer, including a heating platform 18 mounted on the body 17 and an upper conical clamp 19 mounted on the body 17 to cooperate with the heating platform 18. The conical clamp 19 includes an inclined surface and a vertical surface. Commonly used conical clamps 19 have diameters of 0.8cm, 2cm, 2.5cm, 4cm, and 6cm, with a taper of 2° to 4°. The operable space for sample trimming during testing does not exceed 0.4cm. Currently, there is a lack of dedicated trimming tools for the conical clamp 19, and operation relies heavily on manual experience. This can easily lead to a large amount of sample overflowing and adhering to the clamp surface during trimming, affecting not only the sample molding quality but also introducing significant experimental errors, especially for polymer-modified asphalt with high softening points and high viscosity. In addition, inaccurate temperature control during trimming can also cause problems such as asphalt aging or excessive fluidity, further affecting the accuracy and repeatability of test results. Utility Model Content
[0005] The present invention aims to overcome at least one of the defects of the prior art and provide a dressing device for the cone plate clamp of a dynamic shear rheometer. This device solves the technical problem that the lack of a dedicated sample dressing tool for the cone plate clamp of asphalt dynamic shear rheometer testing leads to a large amount of sample overflowing and sticking to the clamp during dressing, resulting in large errors in the test results.
[0006] The technical solution adopted by this utility model is a dressing device for a cone plate clamp of a dynamic shear rheometer, comprising: a handle; a right-angle blade having a connecting end and a free end, the connecting end being fixedly connected to the handle; double blades disposed at the free end of the right-angle blade; the double blades comprising a connected straight blade and an inclined blade, the included angle between the straight blade and the inclined blade being an obtuse angle, used to match the included angle formed by the cone surface and the side surface of the cone plate clamp; and a heating device disposed inside the free end of the right-angle blade, used to generate heat to heat the double blades.
[0007] By incorporating a double-edged blade consisting of a straight edge and an inclined edge, with the included angle between the two edges being an obtuse angle matching the cone-side angle of the conical plate clamp, the trimming device can precisely conform to the unique geometric contours of the conical plate clamp. This allows for thorough and efficient scraping of excess material from the asphalt sample within an extremely limited operating space. This specialized design fundamentally avoids the problems of excessive sample spillage and adhesion to the clamp surface caused by tool mismatch in traditional methods, significantly improving trimming quality and cleanliness, thereby ensuring the accuracy and reliability of subsequent rheological test results.
[0008] Furthermore, the heating device includes a battery, a heating element, and a switch; the battery is disposed inside the handle to provide electrical energy; the heating element is disposed inside the free end of the right-angle tool bar to generate heat; and the switch is disposed on the right-angle tool bar to control the on / off state of the power supply circuit from the battery to the heating element.
[0009] Furthermore, the heating component includes heating wire one and heating wire two; the switch has three positions; wherein, the first position is used to connect heating wire one, the second position is used to connect heating wire two, and the third position is used to disconnect the circuit.
[0010] Furthermore, it also includes a control circuit board disposed inside the handle. The control circuit board integrates a charge and discharge management circuit, the output terminal of which is electrically connected to the common input terminal of the switch. The output terminal corresponding to the first position of the switch is connected to the input terminal of heating wire one, and the output terminal corresponding to the second position is connected to the input terminal of heating wire two. The output terminals of heating wire one and heating wire two are connected to the input terminal of the control circuit board.
[0011] Furthermore, it also includes a bimetallic thermostat, wherein the output ends of heating wire one and heating wire two are connected together and then connected to the input end of the bimetallic thermostat, and the output end of the bimetallic thermostat is connected to the input end of the control circuit board.
[0012] Furthermore, it also includes an indicator light, which is mounted on the right-angle cutter bar and electrically connected to the control circuit board. The indicator light is controlled by the control circuit board to display the corresponding color according to the current working gear.
[0013] Furthermore, it also includes a ceramic insulating ring, which is disposed inside the free end of the right-angled knife bar and surrounds the heating element.
[0014] Furthermore, the handle is ellipsoidal and includes an upper housing and a lower housing, which are fixedly connected by bolts.
[0015] Furthermore, both the upper and lower housings are provided with positioning plates. After the upper and lower housings are spliced together, the positioning plates are spliced together to form a positioning cavity for fixing the battery.
[0016] Furthermore, it also includes an ellipsoidal rubber sleeve that is fitted onto the handle, and the outer surface of the rubber sleeve is provided with anti-slip protrusions.
[0017] Compared with existing technologies, the advantages of this invention are as follows: By setting a double-edged blade containing a straight edge and an inclined edge, and the included angle between the two edges being an obtuse angle matching the cone-side angle of the cone plate clamp, the trimming device can precisely conform to the special geometric contour of the cone plate clamp, thereby achieving thorough and efficient scraping of excess parts of the asphalt sample within an extremely limited operating space. This specialized design fundamentally avoids the problem of excessive sample overflow and adhesion to the clamp surface caused by tool mismatch in traditional methods, significantly improving trimming quality and cleanliness, and thus ensuring the accuracy and reliability of subsequent rheological test results.
[0018] Built-in heating wires one and two with different power levels can select different heating modes through a multi-position switch. This can meet the trimming temperature requirements of conventional materials such as road petroleum asphalt, as well as the high-temperature requirements of polymer-modified asphalt. It effectively prevents problems such as sample flow, aging, or trimming difficulties caused by improper temperature, ensuring sample quality and test accuracy.
[0019] The bimetallic thermostat enables automatic overheat protection during the heating process, preventing damage to the device or burns to operators due to excessive temperature. The handle features an ergonomic ellipsoidal design and is covered with a non-slip rubber sleeve, providing a comfortable and stable grip. The indicator light displays the working status in real time. The overall structure is compact, and the operation is simple and intuitive, significantly improving the efficiency of trimming operations. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the cone plate clamp.
[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model.
[0022] Figure 3 This is a partial sectional view of the free end of the right-angle tool holder of this utility model.
[0023] Figure 4This is a partial sectional view of the tail of the tool holder of this utility model.
[0024] In the diagram: 1. Rubber sleeve; 2. Switch; 3. Indicator light; 4. Right-angle blade; 5. Double-edged blade; 6. Anti-slip protrusion; 7. Heating wire one; 8. Heating wire two; 9. Bimetallic thermostat; 10. Upper housing; 11. Lower housing; 12. Charging interface; 13. Dust cover; 14. Control circuit board; 15. Battery; 16. Ceramic insulating ring; 17. Main body; 18. Heating platform; 19. Conical plate clamp. Detailed Implementation
[0025] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0026] like Figure 2-4 As shown, this solution discloses a dressing device for a cone plate clamp of a dynamic shear rheometer, including an ellipsoidal tool holder and a right-angle tool bar 4, with the right-angle tool bar 4 fixed to the front end of the ellipsoidal tool holder.
[0027] The ellipsoidal handle includes an upper shell 10 and a lower shell 11, both of which are semi-ellipsoidal and are connected together by bolts after assembly. An ellipsoidal rubber sleeve 1 is fitted over the ellipsoidal handle. The outer circumference of the rubber sleeve 1 is provided with anti-slip protrusions 6 of different shapes to increase friction with the hand and improve the grip.
[0028] Positioning plates are provided inside the upper housing 10 and the lower housing 11. When they are joined together, the positioning plates are spliced together to form a cavity for placing the battery 15 in the middle position. The battery 15 is fixed in the cavity by the positioning plates. A control circuit board 14 is fixed to the tail of the lower housing 11 by bolts. A charging interface 12 is provided on the control circuit board 14, which can be a USB or a Type-C interface. When the control circuit board 14 is fixed, the charging interface 12 just extends out of the hole reserved at the tail of the lower housing 11. After the upper housing 10 and the lower housing 11 are joined together, a circular groove is formed at the tail. The charging interface 12 is located in the circular groove, and the circular groove is closed by a dust cover 13.
[0029] The right-angle tool holder 4 is equipped with a switch 2 and an indicator light 3. The end of the right-angle tool holder is a double-edged blade 5. Specifically, the double blades are a straight blade and an inclined blade. The straight blade and the inclined blade are connected and integrally formed. The angle between the straight blade and the inclined blade is an obtuse angle, which matches the angle between the conical surface of the conical clamp and the vertical side.
[0030] The right-angle blade 4 is hollow inside, with a blind end near the double-bladed blade tip. Heating wire 7 and heating wire 8 are housed within this blind end, along with a bimetallic thermostat 9. A ceramic insulating ring 16 is also installed within this blind end, preventing heating wires 7 and 8 from contacting the blade housing and becoming electrified. Heating wires 7 and 8 have different resistance values to provide differentiated heating power. Heating wire 7 is designed with low resistance for low-temperature heating, suitable for samples requiring lower temperatures, such as road asphalt. Heating wire 8 is designed with high resistance for high-temperature heating, suitable for samples with higher softening points, such as polymer-modified asphalt, requiring higher temperatures for operation.
[0031] The circuit connection control section of this solution is described in detail below: Battery 15 serves as the core power supply, and its positive and negative terminals are connected to the power management module on the control circuit board 14. The control circuit board 14 integrates a charging management circuit, which is connected to the charging interface 12 located at the tail of the tool holder, for receiving external power and safely charging battery 15.
[0032] The power output terminal of the control circuit board 14 is connected to the common input terminal of the switch 2 to provide power for heating. The switch 2 is a three-position selector, with its first position output terminal connected to the input terminal of the heating wire 7, and its second position output terminal connected to the input terminal of the heating wire 8.
[0033] The outputs of heating wire 7 and heating wire 8 are connected to a single node and then connected in series to the input of bimetallic thermostat 9. The output of bimetallic thermostat 9 is ultimately connected back to the current feedback input of control circuit board 14, thus forming a complete and monitored heating circuit.
[0034] The control circuit board 14 monitors the operating status of the heating circuit through this current feedback input terminal. The indicator light 3 is connected to the drive circuit on the control circuit board 14, and its display status is controlled by the control circuit board 14 to intuitively indicate the current operating status of the device, such as the red light being on or the light being off when the device is heating.
[0035] The workflow is as follows: When the user switches to position 2, different heating wires are selected for connection to the circuit. Current flows from control circuit board 14, through switch 2, through the selected heating wire, then through bimetallic thermostat 9, and finally back to control circuit board 14, forming a circuit to heat the blade. If the blade temperature is too high, bimetallic thermostat 9 will automatically disconnect the circuit due to deformation, stopping heating and achieving overheat protection. At the same time, control circuit board 14 will detect the circuit disconnection and control indicator light 3 will turn off.
[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A dressing device for a cone-plate clamp of a dynamic shear rheometer, characterized in that, include: Handle; The right-angled tool holder (4) has a connecting end and a free end, and its connecting end is fixedly connected to the tool holder; Double blades are set at the free end of the right-angle tool holder (4); the double blades include a straight blade and an inclined blade connected together, and the angle between the straight blade and the inclined blade is an obtuse angle, which is used to match the angle formed by the conical surface and the side surface of the conical plate fixture. A heating device is installed inside the free end of the right-angle blade (4) to generate heat to heat the double blades.
2. The dressing device for the cone plate clamp of a dynamic shear rheometer according to claim 1, characterized in that: The heating device includes a battery (15), a heating element, and a switch (2); the battery (15) is located inside the handle and is used to provide electrical energy; the heating element is located inside the free end of the right-angle tool bar (4) and is used to generate heat; the switch (2) is located on the right-angle tool bar (4) and is used to control the on / off of the power supply circuit from the battery (15) to the heating element.
3. A dressing device for a cone plate clamp of a dynamic shear rheometer according to claim 2, characterized in that: The heating element includes a first heating wire (7) and a second heating wire (8); the switch (2) has three positions; the first position is used to turn on the first heating wire (7), the second position is used to turn on the second heating wire (8), and the third position is used to turn off the circuit.
4. A dressing device for a cone plate clamp of a dynamic shear rheometer according to claim 3, characterized in that: It also includes a control circuit board (14) located inside the handle. The control circuit board (14) integrates a charge and discharge management circuit. Its output terminal is electrically connected to the common input terminal of the switch (2). The output terminal corresponding to the first position of the switch (2) is connected to the input terminal of the first heating wire (7), and the output terminal corresponding to the second position is connected to the input terminal of the second heating wire (8). The output terminals of the first heating wire (7) and the second heating wire (8) are connected to the input terminal of the control circuit board (14).
5. A dressing device for a cone plate clamp of a dynamic shear rheometer according to claim 4, characterized in that: It also includes a bimetallic thermostat, wherein the output ends of heating wire one (7) and heating wire two (8) are connected together and then connected to the input end of the bimetallic thermostat, and the output end of the bimetallic thermostat is connected to the input end of the control circuit board (14).
6. A dressing device for a cone plate clamp of a dynamic shear rheometer according to claim 4, characterized in that: It also includes an indicator light (3), which is set on the right-angle cutter bar (4) and electrically connected to the control circuit board (14). It is controlled by the control circuit board (14) to display the corresponding color according to the current working gear.
7. A dressing device for a cone plate clamp of a dynamic shear rheometer according to claim 2, characterized in that: It also includes a ceramic insulating ring (16), which is disposed inside the free end of the right-angle knife bar (4) and wrapped around the heating component.
8. A dressing device for a cone plate clamp of a dynamic shear rheometer according to claim 2, characterized in that: The handle is ellipsoidal and includes an upper housing (10) and a lower housing (11), which are fixedly connected by bolts.
9. A dressing device for a cone plate clamp of a dynamic shear rheometer according to claim 8, characterized in that: Positioning plates are provided inside both the upper shell (10) and the lower shell (11). After the upper shell (10) and the lower shell (11) are spliced together, the positioning plates are spliced together to form a positioning cavity for fixing the battery (15).
10. A dressing device for a cone plate clamp of a dynamic shear rheometer according to any one of claims 1-9, characterized in that: It also includes an ellipsoidal rubber sleeve (1), which is fitted onto the handle of the knife, and the outside of the rubber sleeve (1) is provided with anti-slip protrusions (6).