An asphalt penetration testing device
By designing clamping and support components, the stability of the distance between the glass dish and the probe axis in the asphalt penetration testing device and the equilateral triangle layout of the test points are ensured, solving the problem of inaccurate distance control in the existing technology and improving the accuracy of the test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING ZHUODA TESTING TECH CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies make it difficult to precisely control the spacing between test points in asphalt penetration testing, leading to inaccurate test results.
A device for detecting the penetration of asphalt was designed. By using the clamping component and the support component together, the distance between the glass dish and the probe axis is ensured to be between 7mm and 15mm. By rotating the support component, the three test points are arranged into an equilateral triangle to ensure that the distance is greater than 10mm.
It enables precise control of the spacing between experimental points, improving the accuracy and repeatability of the test results.
Smart Images
Figure CN224535713U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of asphalt testing technology, specifically relating to an asphalt penetration testing device. Background Technology
[0002] To assess the hardness and consistency of asphalt products, current technology typically employs a penetration test. During the test, a sample dish containing the sample is placed in water, and a probe is brought into contact with the top surface of the sample before being released. The hardness and consistency of the asphalt are determined by measuring the depth to which the probe penetrates the sample within a specified time.
[0003] Chinese patent CN219532815U discloses a test frame structure for an asphalt penetration tester. This design includes a receiving assembly, within which a clamping assembly is movably mounted. The receiving assembly includes a placement platform with an arc-shaped groove at its upper end and first screw holes on both sides. The clamping assembly includes two arc-shaped plates installed inside the arc-shaped groove, with second lead screws connected to the outer surfaces of both arc-shaped plates. These second lead screws are movably mounted inside first mounting holes. This design utilizes the rotation of the second lead screws to clamp the insulated dish, preventing errors caused by movement of the insulated dish during testing.
[0004] According to the requirements of relevant testing specifications, the same sample needs to be measured at least three times, and the distance between two adjacent test points and the distance between the test point and the inner wall of the sample dish should not be less than 10 mm. The above scheme cannot accurately adjust the specific position of each test point, and thus it is difficult to control the distance between each test point. Utility Model Content
[0005] The present invention aims to provide an asphalt penetration testing device to solve the problem of difficulty in controlling the spacing between test points in the above-mentioned solutions.
[0006] To achieve the above objectives, this utility model provides the following technical solution: An asphalt penetration testing device includes a penetration meter and a glass dish. The penetration meter includes a base, a testing head and a lifting mechanism for moving the testing head up and down are provided on the top of the base, and a probe is installed at the bottom of the testing head. The glass dish is installed on the top of the base by a clamping assembly. The distance L between the axis of the glass dish and the axis of the probe is set to 7mm≤L≤15mm. A sample dish is rotatably installed inside the glass dish along its axis by a support assembly. The support assembly includes a cylinder and a shelf. The cylinder is rotatably inserted into the glass dish and connected to the glass dish by a limiting assembly. A support plate is fixedly provided at the bottom of the inner side wall of the cylinder. The two sides of the shelf are respectively engaged with the support plate and the sample dish.
[0007] The principle and effects of this technical solution: In use, first, the detection head is moved to a high position using the lifting mechanism. Then, a glass dish containing water and a support assembly is placed on top of the base, and the glass dish is positioned using the clamping assembly. The sample dish containing the asphalt sample is then placed into the water inside the glass dish, so that it engages with the shelf of the support assembly. At this point, the sample dish and the glass dish are arranged coaxially. Finally, the probe is installed at the bottom of the detection head, with the axial distance between the sample dish and the probe being L. After lowering the probe to perform one penetration test, the detection head and probe are moved up using the lifting mechanism. After replacing the probe, the support assembly is rotated 120° to rotate the sample dish 120° for the next test. After repeating the above steps twice, three penetration tests are performed on the same sample, and the three test points are connected sequentially to form an equilateral triangle with a side length greater than 10 mm.
[0008] By using the above setup, the glass dish is positioned using the clamping assembly, causing the axis of the sample dish to deviate from the axis of the probe. The rotating support assembly drives the sample dish to rotate, so that the three experimental points are connected in sequence to form an equilateral triangle with a side length greater than 10mm. This solves the problem of difficulty in controlling the spacing between the experimental points in the above scheme.
[0009] In this utility model, a mounting frame with a U-shaped cross-section is fixedly installed on the top of the base. The clamping assembly includes N movable shafts and a turntable rotatably disposed below the mounting frame. The top of the turntable is provided with N first sliding grooves spaced apart along its circumference. The top of the mounting frame is provided with second sliding grooves spaced apart along the radial direction of the turntable, which can be opposite to each of the first sliding grooves. Each movable shaft is sequentially movably inserted into the second sliding groove and the corresponding first sliding groove, and each movable shaft slides against the inner sidewall of the corresponding second sliding groove and the first sliding groove. A driving component for driving the turntable to rotate is provided inside the base. The length direction of each first sliding groove is inclined to the length direction of the corresponding second sliding groove, and N≥3.
[0010] The principle and effects of this technical solution: In the initial state, the end of the first slide away from the turntable axis coincides with the end of the corresponding second slide away from the turntable axis. At this time, the movable shafts are far apart from each other. After the glass dish is placed on the top of the mounting bracket, the turntable is driven to rotate by the drive component. The overlapping part of the first slide and the corresponding second slide gradually approaches the turntable axis until all movable shafts are pressed against the outer wall of the glass dish. At this time, the axis of the glass dish is collinear with the axis of the turntable.
[0011] With the above setup, the glass dish is clamped by the clamping assembly, keeping the glass dish and the axis of the turntable collinear. Since the position of the turntable is fixed, the length L is kept fixed.
[0012] In this utility model, the shelf includes a shelf panel, at least three first legs are fixedly arranged at intervals along the circumference of one side of the shelf panel, and at least three second legs are fixedly arranged at intervals along the circumference of the other side of the shelf panel. The diameter of the circumscribed circle enclosed by each second leg is larger than the diameter of the circumscribed circle enclosed by each first leg. The top of the support plate is provided with a slot that mates with each of the first and second legs.
[0013] With the above-mentioned configuration, the top of the support plate is provided with a slot that mates with each of the first and second legs, which can limit the installation position of the shelf. With at least three first or second legs spaced apart on both sides of the shelf, the shelf can be engaged with two different types of sample dishes, making the axes of the sample dishes, shelf, glassware and turntable collinear, and ultimately limiting the installation position of the sample dishes.
[0014] In this invention, both the first and second legs are arranged at an angle. This arrangement guides the sample dish when placing it, reducing the difficulty of attaching the sample dish to the shelf.
[0015] In this invention, the top of the placement plate is provided with first through grooves spaced circumferentially within the tangent circle enclosed by each of the first legs. This arrangement increases the contact area between the sample dish and the water, thereby improving the accuracy of the test results.
[0016] In this utility model, an outer edge is fixedly provided at the top of the outer side wall of the cylinder, and a notch is provided on the outer side wall. A fixed shaft is provided in the notch. The limiting component includes a movable plate rotatably sleeved on the fixed shaft. A hemispherical limiting block is fixedly provided at the bottom of the inner side wall of the movable plate. At least three limiting grooves that cooperate with the limiting blocks are equally spaced along the outer side wall of the glass dish. A torsion spring is also sleeved on the outside of the fixed shaft. The two torsion arms of the torsion spring abut against the inner side wall of the movable plate and the inner side wall of the notch, respectively.
[0017] The principle and effects of this technical solution: When rotating the cylinder, press the top of the inner wall of the cylinder and the outer wall of the pressure plate. Under the action of the lever, the bottom of the movable plate is disengaged from the glass dish, causing the limiting block to disengage from the limiting groove. Then rotate the cylinder. When the limiting block is aligned with the next limiting groove, the torsion spring pushes the movable plate to reset, and the limiting block is locked in the next limiting groove.
[0018] With the above setup, by sequentially locking the limiting blocks into the three limiting grooves on the outer periphery of the glass dish, it can be ensured that the angle of rotation of the cylinder by the tester is 120° each time, thus improving the accuracy of controlling the spacing between each experimental point.
[0019] In this invention, a second through groove is provided at intervals along the circumference of the top of the support plate. This design facilitates the assembly and disassembly of the support components after the glass dish is filled with water, improving the ease of operation of the device. Attached Figure Description
[0020] Figure 1 This is an isometric view of the overall structure of this utility model; Figure 2 Disassembly of the components of this utility model Figure 1 ; Figure 3 Disassembly of the components of this utility model Figure 2 ; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a side view of the present invention; Figure 6 This is a partial side sectional view of the present invention. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: The reference numerals in the accompanying drawings of the instruction manual include: 11, base; 12, lifting mechanism; 13, detection head; 14, probe; 15, mounting bracket; 16, second slide groove; 20, glass dish; 21, limiting groove; 30, sample dish; 41, cylinder; 411, outer edge; 412, notch; 413, fixed shaft; 42, shelf; 421, shelf plate; 422, first leg; 423, second leg; 424, first through groove; 43, support plate; 431, slot; 432, second through groove; 51, movable shaft; 52, turntable; 521, first slide groove; 61, movable plate; 62, limiting block; 63, torsion spring.
[0022] Example: As attached Figure 1-6As shown, this utility model discloses an asphalt penetration testing device, including a penetration meter and a glass dish 20. The penetration meter includes a base 11, a testing head 13 and a lifting mechanism 12 for moving the testing head 13 up and down are provided on the top of the base 11, and a probe 14 is installed at the bottom of the testing head 13. The glass dish 20 is installed on the top of the base 11 by a clamping assembly. The distance between the axis of the glass dish 20 and the axis of the probe 14 is L, which is set to 7mm≤L≤15mm. A sample dish 30 is installed inside the glass dish 20 by a support assembly that rotates along its axis. The support assembly includes a cylinder 41 and a shelf 42. The cylinder 41 is rotatably inserted into the glass dish 20 and connected to the glass dish 20 by a limiting assembly. A support plate 43 is fixedly provided at the bottom of the inner side wall of the cylinder 41. The two sides of the shelf 42 are respectively engaged with the support plate 43 and the sample dish 30.
[0023] In this embodiment, a mounting frame 15 with a U-shaped cross-section is fixedly installed on the top of the base 11. The clamping assembly includes N movable shafts 51 and a turntable 52 rotatably disposed below the mounting frame 15. The top of the turntable 52 is provided with N first sliding grooves 521 spaced apart along its circumference. The top of the mounting frame 15 is provided with second sliding grooves 16 spaced apart along the radial direction of the turntable 52, which can be opposite to each of the first sliding grooves 521. Each movable shaft 51 is sequentially movably inserted into the second sliding groove 16 and the corresponding first sliding groove 521, and each movable shaft 51 slides against the inner sidewall of the corresponding second sliding groove 16 and the first sliding groove 521. A driving member for driving the turntable 52 to rotate is provided inside the base 11. The length direction of each first sliding groove 521 is inclined to the length direction of the corresponding second sliding groove 16, and N≥3.
[0024] In this embodiment, the shelf 42 includes a shelf 421. At least three first legs 422 are fixedly arranged at intervals along the circumference of one side of the shelf 421, and at least three second legs 423 are fixedly arranged at intervals along the circumference of the other side of the shelf 421. The diameter of the circumscribed circle enclosed by each second leg 423 is larger than the diameter of the circumscribed circle enclosed by each first leg 422. The top of the support plate 43 is provided with a slot 431 that mates with each first leg 422 and second leg 423. The outer surfaces of the shelf 421, the first legs 422 and the second legs 423 are all covered with an anti-slip layer.
[0025] In this embodiment, each of the first leg 422 and the second leg 423 is arranged at an angle.
[0026] In this embodiment, the top of the shelf 421 is provided with a first through groove 424 at intervals along the circumference of the shelf 421 within the outer tangent circle enclosed by each of the first legs 422.
[0027] In this embodiment, an outer edge 411 is fixedly provided on the top of the outer side wall of the cylinder 41, and a notch 412 is provided on the side wall of the outer edge 411. A fixed shaft 413 is provided in the notch 412. The limiting component includes a movable plate 61 rotatably sleeved on the fixed shaft 413. A hemispherical limiting block 62 is fixedly provided on the bottom of the inner side wall of the movable plate 61. At least three limiting grooves 21 that cooperate with the limiting blocks 62 are equally spaced along the circumference of the outer side wall of the glass dish 20. A torsion spring 63 is also sleeved on the outside of the fixed shaft 413. The two torsion arms of the torsion spring 63 abut against the inner side wall of the movable plate 61 and the inner side wall of the notch 412, respectively.
[0028] In this embodiment, the top of the support plate 43 is provided with a second through groove 432 spaced apart along its circumference.
[0029] The specific implementation process is as follows: In use, the detection head 13 is first moved to a high position by the lifting mechanism 12. Then, the glass dish 20 containing water and the support assembly is placed on top of the base 11, and the glass dish 20 is limited by the clamping assembly. The sample dish 30 containing the asphalt sample is placed into the water in the glass dish 20, so that it is engaged with the shelf 42 of the support assembly. At this time, the sample dish 30 and the glass dish 20 are arranged coaxially. Finally, the probe 14 is installed at the bottom of the detection head 13. At this time, the axial distance between the sample dish 30 and the probe 14 is L. After the probe 14 is lowered to perform one penetration test, the detection head 13 and the probe 14 are moved up by the lifting mechanism 12. After the probe 14 is replaced, the support assembly is rotated 120° to drive the sample dish 30 to rotate 120° for the next test. After repeating the above steps twice, three penetration tests are performed on the same sample. The three test points are connected in sequence to form an equilateral triangle with a side length greater than 10 mm.
[0030] In the initial state, the end of the first slide groove 521 away from the axis of the turntable 52 coincides with the end of the corresponding second slide groove 16 away from the axis of the turntable 52. At this time, the movable shafts 51 are far apart from each other. After the glass dish 20 is placed on the top of the mounting bracket 15, the turntable 52 is driven to rotate by the driving component. The overlapping part of the first slide groove 521 and the corresponding second slide groove 16 gradually approaches the axis of the turntable 52, thereby pushing the movable shafts 51 closer to each other until the movable shafts 51 are all pressed against the outer wall of the glass dish 20. At this time, the axis of the glass dish 20 is collinear with the axis of the turntable 52.
[0031] The drive unit can be configured as a motor structure with a power-off self-locking mechanism. By detecting the motor current, when the movable shaft 51 presses against the glass dish 20, the motor current increases. When it exceeds a threshold, the control module of the device cuts off the power supply to the motor. Alternatively, the motor can be connected to a manual switch, and the operator can manually cut off the power supply to the motor after visually observing the movable shaft 51 pressing against the glass dish 20.
[0032] When the cylinder 41 is rotated, the top of the inner wall of the cylinder 41 and the outer wall of the pressure plate is pressed. Under the action of the lever, the bottom of the movable plate 61 is disengaged from the glass dish 20, so that the limiting block 62 is disengaged from the limiting groove 21. Then the cylinder 41 is rotated. When the limiting block 62 is aligned with the next limiting groove 21, the torsion spring 63 pushes the movable plate 61 to reset, and the limiting block 62 is locked in the next limiting groove 21.
[0033] The parts of the device not covered herein are the same as or can be implemented using existing technologies.
[0034] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. An asphalt penetration testing device, characterized in that, include: A needle penetration meter, comprising a base, a detection head and a lifting mechanism for moving the detection head up and down are provided on the top of the base, and a probe is installed on the bottom of the detection head; A glass dish is mounted on the top of a base via a clamping assembly. The distance between the axis of the glass dish and the axis of the probe is L, which is set to 7mm≤L≤15mm. A sample dish is mounted inside the glass dish via a support assembly that rotates along its axis. The support assembly includes a cylinder and a shelf. The cylinder is rotatably inserted into the glass dish and connected to the glass dish through a limiting component. A support plate is fixedly provided at the bottom of the inner side wall of the cylinder. The two sides of the shelf are respectively engaged with the support plate and the sample dish.
2. The asphalt penetration testing device as described in claim 1, characterized in that: The top of the base is fixedly provided with a mounting frame with a U-shaped cross section. The clamping assembly includes N movable shafts and a turntable rotatably disposed below the mounting frame. The top of the turntable is provided with N first sliding grooves spaced apart along its circumference. The top of the mounting frame is provided with second sliding grooves spaced apart along the radial direction of the turntable, which can be opposite to each of the first sliding grooves. Each movable shaft is sequentially movably inserted into the second sliding groove and the corresponding first sliding groove, and each movable shaft slides against the inner sidewall of the corresponding second sliding groove and the first sliding groove. The base is provided with a driving component for driving the turntable to rotate. The length direction of each first sliding groove is inclined to the length direction of the corresponding second sliding groove, and N≥3.
3. The asphalt penetration testing device as described in claim 1, characterized in that: The shelf includes a shelf panel, with at least three first legs fixedly arranged at intervals along its circumference on one side of the shelf panel, and at least three second legs fixedly arranged at intervals along its circumference on the other side of the shelf panel. The diameter of the circumscribed circle enclosed by each second leg is larger than the diameter of the circumscribed circle enclosed by each first leg. The top of the support plate is provided with a slot that mates with each of the first and second legs.
4. The asphalt penetration testing device as described in claim 3, characterized in that: Each of the first and second legs is arranged at an angle.
5. The asphalt penetration testing device as described in claim 3, characterized in that: The top of the shelf is provided with first through slots spaced apart along the circumference of the shelf within the outer tangent circle enclosed by each of the first legs.
6. The asphalt penetration testing device as described in claim 1, characterized in that: The top of the outer wall of the cylinder is fixedly provided with an outer edge, and a notch is provided on the outer edge sidewall. A fixed shaft is provided in the notch. The limiting component includes a movable plate rotatably sleeved on the fixed shaft. A hemispherical limiting block is fixedly provided at the bottom of the inner sidewall of the movable plate. At least three limiting grooves that cooperate with the limiting blocks are equally spaced along the circumference of the outer wall of the glass dish. A torsion spring is also sleeved on the outside of the fixed shaft. The two torsion arms of the torsion spring abut against the inner sidewall of the movable plate and the inner sidewall of the notch, respectively.
7. The asphalt penetration testing device as described in claim 1, characterized in that: The top of the support plate is provided with a second through groove spaced apart along its circumference.