A dynamic shear rheometer for bitumen

Abstract

The utility model relates to the technical field of shearing rheometer, and disclose a kind of asphalt dynamic shearing rheometer, including rheometer body, upper plate connected on rheometer body and lower plate connected on the operating platform of rheometer body, the outer wall of the operating platform of rheometer body is connected with mounting ring, L type slide is rotatably connected in the mounting ring, the top of L type slide is slidably connected with scraper, the bottom surface of scraper is slidably connected with the top surface of lower plate, the end outer wall of scraper is slidably connected with lower plug plate.The utility model is cooperatively arranged by mounting ring, L type slide, scraper and lower plug plate, so that overflow is rotated around lower plate by scraper and scraped off, overflow is cut off with the lower insertion of lower plug plate, scraper moves out, and lower plug plate is taken out, so that overflow is concentrated and away from the side of upper plate, overflow is cleaned separately after being separated from upper plate, and the operation between upper plate and lower plate is not delayed.

Description

Technical Field

[0001] This utility model relates to the field of shear rheometer technology, specifically to an asphalt dynamic shear rheometer. Background Technology

[0002] The dynamic shear rheometer (DSR) is a specialized instrument for testing the viscoelasticity of asphalt. It applies periodic shear stress / strain to a sample using a parallel or conical plate to measure the complex shear modulus and phase angle. It is primarily used for asphalt performance grading, comparing performance before and after aging, and optimizing modified formulations, providing crucial data for asphalt material design and pavement durability assessment.

[0003] For example, Chinese utility model patent CN115201032A discloses a portable dynamic shear rheometer for asphalt, belonging to the technical field of asphalt rheological testing equipment. This dynamic shear rheometer for asphalt includes a mechanical structure module and a drive and acquisition module. Specifically: the mechanical structure module includes an actuation module, a clamping module, and a displacement adjustment module; the actuation module includes a grating encoder, a stepper motor, a torque sensor, and a lower housing; the clamping module includes an upper sample clamp, a lower sample clamp, and a temperature sensor; the displacement adjustment module includes a concentric adjustment mechanism, a sample thickness adjustment mechanism, and a limiting block; the drive and acquisition module includes a closed-loop motor driver, a high-speed torque acquisition card, and a PID temperature controller.

[0004] While the aforementioned device solves the portability issue, it still has the following drawbacks: when the upper clamp lowers the pressure bar, the asphalt sample on the lower plate is squeezed, causing edge overflow. To ensure the accuracy of the test sample's geometric dimensions, the overflowing asphalt needs to be trimmed. Currently, a trimming knife is commonly used to manually trim the edges of the upper and lower parallel plates. However, this method requires repeated operations, resulting in low trimming efficiency, a cumbersome process, and difficulty in ensuring consistent trimming quality, making it inconvenient to operate. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an asphalt dynamic shear rheometer, which makes the scraping operation of the rheometer easier to perform.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an asphalt dynamic shear rheometer, comprising a rheometer body, an upper plate connected to the rheometer body, and a lower plate connected to the operating platform of the rheometer body. The outer wall of the operating platform of the rheometer body is connected to a mounting ring, an L-shaped slide rod is rotatably connected to the middle position of the mounting ring, a scraper is slidably connected to the top of the L-shaped slide rod, the bottom surface of the scraper is slidably connected to the top surface of the lower plate, and a lower insert plate is slidably connected to the outer wall of the end of the scraper.

[0007] Furthermore, an L-shaped connecting rod is fixedly connected to one side of the top of the lower insert plate, and a limiting rod is slidably connected inside the L-shaped connecting rod. A base plate is fixedly connected to the outer wall of the scraper, and a spring is fixedly connected to the top of the base plate. The other end of the spring is fixedly connected to the L-shaped connecting rod, and the limiting rod is fixedly connected to the top surface of the base plate and located within the central axis of the spring.

[0008] Furthermore, an annular groove is provided inside the mounting ring, one end of the L-shaped slide rod is slidably connected inside the annular groove, a slider is fixedly connected to the top of the L-shaped slide rod, and a groove corresponding to the slider is provided at the bottom of the scraper.

[0009] Furthermore, the outer wall of the scraper is provided with an insertion hole, and an L-shaped card that is rotatably connected to the slider is snapped into the insertion hole.

[0010] Furthermore, a receiving plate is fixedly connected to the outer wall of the L-shaped slide bar, and the receiving plate and the lower insert plate are located on the same side.

[0011] Furthermore, the mounting ring is detachably connected to the operating platform of the rheometer body via fastening bolts.

[0012] Furthermore, the limiting rod is a rectangular rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model, through the coordinated arrangement of the mounting ring, L-shaped sliding rod, scraper, and lower insert plate, allows the overflow edge to be scraped off by the scraper rotating around the lower plate. As the lower insert plate is inserted, the overflow edge is cut off, the scraper moves out, and the lower insert plate is brought out, thereby concentrating the overflow edge and moving it away from the upper plate. This allows the overflow edge to be separated from the upper plate for separate cleaning, without delaying the operation between the upper and lower plates. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of a partial state of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the scraper and lower insert plate of this utility model;

[0018] Figure 4 This is a three-dimensional cross-sectional structural diagram of the mounting plate of this utility model;

[0019] Figure 5 For this Figure 4 A magnified three-dimensional structural diagram of A in the middle.

[0020] In the diagram: 1. Rheometer body; 2. Upper plate; 3. Lower plate; 4. Mounting ring; 5. Annular groove; 6. Scraper; 7. L-shaped slide bar; 8. Lower insert plate; 9. L-shaped connecting rod; 10. Fastening bolt; 11. Slide groove; 12. Insertion hole; 13. Limiting rod; 14. Slider; 15. Base plate; 16. Support plate; 17. L-shaped clamping plate; 18. Spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] like Figures 1 to 5 As shown, an asphalt dynamic shear rheometer includes a rheometer body 1, an upper plate 2 connected to the rheometer body 1, and a lower plate 3 connected to the operating table of the rheometer body 1. An installation ring 4 is connected to the outer wall of the operating table of the rheometer body 1. An L-shaped slide rod 7 is rotatably connected to the middle position of the installation ring 4. A scraper 6 is slidably connected to the top of the L-shaped slide rod 7. The bottom surface of the scraper 6 is slidably connected to the top surface of the lower plate 3. A lower insert plate 8 is slidably connected to the outer wall of the end of the scraper 6.

[0023] like Figure 1 As shown, the asphalt dynamic shear rheometer of this utility model is structurally similar to existing portable asphalt dynamic shear rheometers, such as the portable asphalt dynamic shear rheometer disclosed in patent publication number CN115201032A. The main improvement of this utility model is that it makes the scraping operation of the rheometer easier to operate, such as... Figures 1 to 5 As shown, in the use of the asphalt dynamic shear rheometer of this utility model, when the upper plate 2 descends with the equipment, it squeezes the asphalt sample on the lower plate 3 located on the operating table of the rheometer body 1. There will be overflow around the periphery of the upper plate 2. Pushing the scraper 6 will cause the scraper 6 to slide on the top of the L-shaped slide bar 7, so that the end and bottom of the scraper 6 move with the end of the lower plate 3, and the end of the scraper 6 abuts against the overflow edge of the upper plate 2. Then, rotating the scraper 6 will cause the scraper 6 to rotate around the upper plate 2 once, scraping away the overflow edge. Located precisely on the side wall of scraper 6, the lower insert plate 8 is then pressed down, allowing it to insert precisely into the outer edge of the upper plate 2 and the outer end wall of scraper 6. In this way, the lower insert plate 8 separates the overflowing asphalt from the upper plate 2. Then, scraper 6 is pulled, causing scraper 6 and lower insert plate 8 to move simultaneously, pulling away the overflow. Subsequently, the overflow on scraper 6 and lower insert plate 8 can be cleaned. Without the obstruction of the pressure rod shaft of the upper plate 2, cleaning the overflow is much simpler, and it does not delay the operation between the upper plate 2 and the lower plate 3.

[0024] By installing the ring 4, L-shaped slide bar 7, scraper 6, and lower insert plate 8, the overflow edge can be scraped off by the scraper 6 rotating around the lower plate 3. As the lower insert plate 8 is inserted, the overflow edge is cut off. The scraper 6 moves out, taking the lower insert plate 8 out with it, thus concentrating the overflow edge and moving it away from the upper plate 2. This allows the overflow edge to be separated from the upper plate 2 and cleaned separately without delaying the operation between the upper plate 2 and the lower plate 3.

[0025] like Figure 2 , Figure 3 and Figure 4 As shown, an L-shaped connecting rod 9 is fixedly connected to one side of the top of the lower insert plate 8. A limiting rod 13 is slidably connected inside the L-shaped connecting rod 9. A base plate 15 is fixedly connected to the outer wall of the scraper plate 6. A spring 18 is fixedly connected to the top of the base plate 15. The other end of the spring 18 is fixedly connected to the L-shaped connecting rod 9. The limiting rod 13 is fixedly connected to the top surface of the base plate 15 and is located within the central axis of the spring 18.

[0026] Specifically, when the scraper 6 rotates around the upper plate 2, the lower insert plate 8 is lifted by the spring 18 and will not descend. After the scraper 6 rotates one revolution, the lower insert plate 8 can be pressed to compress the spring 18, causing the L-shaped connecting rod 9 to slide down on the outside of the limiting rod 13. This arrangement makes the bottom surface of the lower insert plate 8 abut against the top surface of the lower plate 3. As the scraper 6 moves backward, the lower insert plate 8 and the scraper 6 simultaneously carry away the overflow.

[0027] like Figure 4 As shown, an annular groove 5 is provided inside the mounting ring 4, one end of the L-shaped slide rod 7 is slidably connected inside the annular groove 5, a slider 14 is fixedly connected to the top of the L-shaped slide rod 7, and a groove 11 corresponding to the slider 14 is provided at the bottom of the scraper 6.

[0028] Specifically, when the scraper 6 rotates, it drives the L-shaped slide bar 7 to rotate within the annular groove 5. When the scraper 6 needs to move back and forth, it can be pulled so that the slide groove 11 at the bottom of the scraper 6 slides outside the slider 14 at the top of the L-shaped slide bar 7, ensuring the stability of the scraper 6 moving back and forth.

[0029] like Figure 2 and Figure 5 As shown, the outer wall of the scraper 6 has an insertion hole 12, and an L-shaped retaining plate 17 that is rotatably connected to the slider 14 is engaged in the insertion hole 12. When the scraper 6 moves forward and abuts against the outer wall of the upper plate 2, the L-shaped retaining plate 17 can be rotated so that its end is engaged with the insertion hole 12. This ensures that the position of the scraper 6 after movement is limited by the L-shaped retaining plate 17, and the scraper 6 will not slide on the slider 14 when rotating, thereby ensuring that the scraper 6 can perform a stable rotating scraping action.

[0030] like Figure 2 , Figure 3 and Figure 4As shown, a receiving plate 16 is fixedly connected to the outer wall of the L-shaped sliding rod 7, and the receiving plate 16 and the lower insert plate 8 are located on the same side. When the asphalt overflow is carried out by the scraper 6 and the lower insert plate 8, the bottom of the scraper 6 and the lower insert plate 8 gradually separates from the top surface of the upper plate 2. When the scraper 6 and the lower insert plate 8 are completely separated, the asphalt can be received by the receiving plate 16. This setting can prevent the asphalt from dripping from the top surface of the lower plate 3 and contaminating the surrounding area. In specific applications, the receiving plate 16 can also be set as a receiving box, so that the dripping asphalt will not flow out.

[0031] like Figure 2 As shown, the mounting ring 4 is detachably connected to the operating table of the rheometer body 1 via fastening bolts 10. This design facilitates the installation and removal of the mounting ring 4.

[0032] like Figure 3 As shown, the limiting rod 13 is a rectangular rod. The limiting rod 13, which is a rectangular rod, can facilitate the L-shaped connecting rod 9 to be limited by the limiting rod 13 when it is raised or lowered.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dynamic shear rheometer for asphalt, comprising a rheometer body (1), an upper plate (2) connected to the rheometer body (1), and a lower plate (3) connected to the operating platform of the rheometer body (1), characterized in that, The outer wall of the operating table of the rheometer body (1) is connected to an installation ring (4), and an L-shaped slide rod (7) is rotatably connected inside the installation ring (4). A scraper (6) is slidably connected to the top of the L-shaped slide rod (7). The bottom surface of the scraper (6) is slidably connected to the top surface of the lower plate (3). A lower insert plate (8) is slidably connected to the outer wall of the end of the scraper (6).

2. The asphalt dynamic shear rheometer according to claim 1, characterized in that, An L-shaped connecting rod (9) is fixedly connected to one side of the top of the lower insert plate (8). A limiting rod (13) is slidably connected to the middle position of the L-shaped connecting rod (9). A base plate (15) is fixedly connected to the outer wall of the scraper (6). A spring (18) is fixedly connected to the top of the base plate (15). The other end of the spring (18) is fixedly connected to the L-shaped connecting rod (9). The limiting rod (13) is fixedly connected to the top surface of the base plate (15) and is located within the central axis of the spring (18).

3. The asphalt dynamic shear rheometer according to claim 2, characterized in that, The mounting ring (4) has an annular groove (5) inside. One end of the L-shaped slide rod (7) is slidably connected in the annular groove (5). The top of the L-shaped slide rod (7) is fixedly connected to a slider (14). The bottom of the scraper (6) has a groove (11) corresponding to the slider (14).

4. The asphalt dynamic shear rheometer according to claim 3, characterized in that, The outer wall of the scraper (6) is provided with an insertion hole (12), and an L-shaped card plate (17) that is rotatably connected to the slider (14) is inserted into the insertion hole (12).

5. The asphalt dynamic shear rheometer according to claim 4, characterized in that, The outer wall of the L-shaped slide bar (7) is fixedly connected to a support plate (16), and the support plate (16) and the lower insert plate (8) are located on the same side.

6. The asphalt dynamic shear rheometer according to claim 5, characterized in that, The mounting ring (4) is detachably connected to the operating table of the rheometer body (1) by fastening bolts (10).

7. The asphalt dynamic shear rheometer according to claim 6, characterized in that, The limiting rod (13) is a rectangular rod.

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