Asphalt mixture Marshall test piece height measuring scale

Abstract

The utility model relates to the field of measuring tools, in particular to an asphalt mixture Marshall test piece height measuring scale which comprises a measuring straight scale. The measuring clamp comprises a fixed claw and a movable claw, the fixed claw is fixed with one end of the measuring ruler, and the movable claw is connected with the measuring ruler in a sliding manner; the first measuring piece is connected to the fixed claw, and one end, far away from the fixed claw, of the first measuring piece faces the movable claw; and the second measuring piece is connected to the movable claw, and one end, far away from the movable claw, of the second measuring piece faces the fixed claw. The method has the effect of improving the measurement efficiency.

Description

Technical Field

[0001] The present application relates to the field of measuring tools, and in particular to a height measuring ruler for Marshall specimens of asphalt mixtures. Background Art

[0002] Marshall specimens are used for Marshall tests, which are tests to determine the optimal asphalt-aggregate ratio. Among them, there are strict requirements for the height specifications of Marshall specimens.

[0003] The preparation method of Marshall specimens is to fill asphalt mixtures into a Marshall test mold by the standard compaction method. The Marshall test mold has a through-hole structure, and there is a certain distance between its two ends and the asphalt mixtures filled inside. The existing method for measuring the height of Marshall specimens is to use a straight ruler to measure the height of the Marshall test mold, then measure the distances between the ends of the Marshall test mold and the surface of the asphalt mixtures respectively and calculate the average value, and finally subtract the average value from the total height of the Marshall test mold to calculate the height of the Marshall specimen inside the Marshall test mold. To obtain the height of the Marshall specimen, three sets of size data need to be measured, and calculations are also required to obtain the measurement result. The measurement process is cumbersome and the measurement efficiency is low. Content of the Utility Model

[0004] In order to improve the measurement efficiency, the present application provides a height measuring ruler for Marshall specimens of asphalt mixtures.

[0005] A height measuring ruler for Marshall specimens of asphalt mixtures, comprising:

[0006] A measuring straight ruler;

[0007] A measuring clamp, including a fixed claw and a movable claw. The fixed claw is fixed to one end of the measuring straight ruler, and the movable claw is slidably connected to the measuring straight ruler;

[0008] A first measuring member, connected to the fixed claw, and the end of the first measuring member away from the fixed claw faces the movable claw;

[0009] A second measuring member, connected to the movable claw, and the end of the second measuring member away from the movable claw faces the fixed claw.

[0010] By adopting the above technical solution, when it is necessary to measure the height of the Marshall specimen, the first measuring member and the second measuring member are fitted together, and the fixed value at the position of the moving claw on the measuring ruler at this moment is read out. The Marshall test mold is placed between the first measuring member and the second measuring member. Both the first measuring member and the second measuring member extend into the Marshall test mold and are respectively abutted against both sides of the Marshall specimen to clamp the Marshall specimen. The measured value at the position of the moving claw on the measuring ruler at this moment is read out. The result value obtained by subtracting the fixed value from the measured value is the height value of the Marshall specimen. In actual operation, the fixed value remains unchanged. Therefore, during the measurement of the Marshall specimen, only the measured value at the position of the moving claw on the measuring ruler when the Marshall test mold is between the first measuring member and the second measuring member needs to be read out. It is not necessary to measure the dimensions of the Marshall test mold and the Marshall specimen multiple times, nor is it necessary to calculate the average value, which simplifies the measurement steps and improves the measurement efficiency.

[0011] Preferably, abutting members are provided on the sides of the first measuring member and the second measuring member that are close to each other. The abutting members are symmetrically arranged. The abutting members are provided with abutting surfaces. The abutting surfaces are located on the sides of the two abutting members that are close to each other, and the abutting surfaces are perpendicular to the length direction of the measuring ruler. The area of the abutting surface is larger than the area of the first measuring member on the side close to the moving claw, and the area of the abutting surface is larger than the area of the second measuring member on the side close to the fixed claw.

[0012] By adopting the above technical solution, the contact area between the first measuring member and the Marshall specimen, and the contact area between the second measuring member and the Marshall specimen are increased, thereby improving the stability of clamping the Marshall specimen and the accuracy of measuring the height of the Marshall specimen.

[0013] Preferably, the abutting member is detachably connected to the first measuring member or the second measuring member.

[0014] By adopting the above technical solution, when the area of the abutting surface is much smaller than the area of the test surface of the Marshall specimen, the abutting member can be replaced to make the area of the abutting surface close to the area of the surface of the Marshall specimen, further improving the stability of clamping the Marshall specimen.

[0015] Preferably, one end of the abutting member is connected with an insertion rod. Both the first measuring member and the second measuring member are provided with insertion slot openings that match the insertion rod for insertion, and the insertion rod is inserted into the insertion slot openings.

[0016] By adopting the above technical solution, when installing the abutting member, the insertion rod is inserted into the socket groove, and the slot size of the socket groove matches the insertion rod, which is convenient for limiting the position of the insertion rod, improving the convenience of replacing the abutting member, reducing the replacement time during the measurement of Marshall specimens, thus saving the measurement time, and improving the measurement efficiency of Marshall specimens.

[0017] Preferably, the extended cross-section of the insertion rod is polygonal.

[0018] By adopting the above technical solution, the possibility of the insertion rod rotating when inserted into the socket groove is reduced, the installation stability of the abutting member is improved, and further the stability of clamping the Marshall specimen is improved.

[0019] Preferably, the abutting member is provided with a locking assembly, and the abutting member is fixed to the first measuring member or the second measuring member through the locking assembly.

[0020] By adopting the above technical solution, after the insertion rod is inserted into the socket groove, the locking assembly is used to fix the insertion rod to the first measuring member or the second measuring member, reducing the possibility of measurement errors caused by the position movement of the abutting member, improving the accuracy of the measurement data, reducing the possibility of re-measurement due to inaccurate measurement data, and further improving the measurement efficiency.

[0021] Preferably, the abutting surface of the abutting member is circular.

[0022] By adopting the above technical solution, the abutting surface of the abutting member is circular, and when the abutting member abuts against the surface of the Marshall specimen, the contact area between the abutting member and the Marshall specimen is increased, improving the accuracy of the measurement data.

[0023] Preferably, the moving claw is connected with a display, and the display is used to display the distance between the two abutting surfaces.

[0024] By adopting the above technical solution, when measuring the Marshall specimen, the data displayed on the display is the distance between the two sides of the two abutting members close to each other. Reading the data on the display can obtain the height value of the Marshall specimen. By direct comparison, it can be quickly judged whether the height of the Marshall specimen meets the specification requirements without calculation, further improving the measurement efficiency.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. When it is necessary to measure the height of a Marshall specimen, the first measuring piece is fitted to the second measuring piece, and the fixed value at the position of the moving claw on the measuring ruler is read at this moment. Let the Marshall test mold be between the first measuring piece and the second measuring piece. Both the first measuring piece and the second measuring piece extend into the Marshall test mold and are respectively abutted against both sides of the Marshall specimen to clamp the Marshall specimen. The measured value at the position of the moving claw on the measuring ruler is read at this moment. The result value obtained by subtracting the fixed value from the measured value is the height value of the Marshall specimen. In actual operation, the fixed value remains unchanged. Therefore, during the measurement of the Marshall specimen, only the measured value at the position of the moving claw on the measuring ruler when the Marshall test mold is between the first measuring piece and the second measuring piece needs to be read. It is not necessary to measure the dimensions of the Marshall test mold and the Marshall specimen multiple times, nor is it necessary to calculate the average value, which simplifies the measurement steps and improves the measurement efficiency;

[0027] 2. Increase the contact area between the first measuring piece and the Marshall specimen, as well as the contact area between the second measuring piece and the Marshall specimen, thereby improving the stability of clamping the Marshall specimen and the accuracy of measuring the height of the Marshall specimen;

[0028] 3. When measuring the Marshall specimen, the data displayed on the display is the distance between the mutually approaching sides of the two abutting members. By reading the data on the display, the height value of the Marshall specimen can be obtained. By directly comparing, it can be quickly judged whether the height of the Marshall specimen meets the specification requirements without the need for calculation, further improving the measurement efficiency. Brief Description of the Drawings

[0029] Figure 1 It is a schematic diagram of clamping a Marshall specimen of the present application.

[0030] Figure 2 It is a schematic diagram of the overall structure of the present application.

[0031] Figure 3 It is an exploded view of the abutting member and the second measuring piece of the present application.

[0032] Figure 4 It is a schematic diagram of the structure of the abutting member of the present application.

[0033] Description of the Reference Numerals in the Drawings:

[0034] 1. Marshall test mold; 2. Marshall specimen; 3. Measuring ruler; 4. Fixed claw; 41. First measuring piece; 5. Moving claw; 51. Second measuring piece; 6. Abutting member; 61. Abutting surface; 7. Display; 8. Insertion rod; 81. Socket groove; 82. Locking assembly. Detailed Description of the Specific Embodiment

[0035] The following will further describe the present application in detail Figures 1-4 with reference to the attached drawings.

[0036] The Marshall mold 1 has a cylindrical through-hole structure, and the Marshall specimen 2 is located within the through-hole of the Marshall mold 1.

[0037] An embodiment of the present application discloses a height measuring ruler for a Marshall specimen of asphalt mixture.

[0038] Embodiment 1

[0039] Referring to Figure 1 and Figure 2 , a height measuring ruler for a Marshall specimen of asphalt mixture includes a measuring straight ruler 3 and a measuring clamp. The measuring clamp is used to clamp the specimen. The measuring clamp includes a fixed claw 4 and a moving claw 5. The fixed claw 4 is fixedly installed at the end of the measuring straight ruler 3. The moving claw 5 is slidably connected to the measuring straight ruler 3. The moving claw 5 can slide along the length direction of the measuring straight ruler 3, approaching or moving away from the fixed claw 4. The side where the fixed claw 4 and the moving claw 5 approach each other forms a clamping area for the Marshall specimen 2. The fixed claw 4 and the moving claw 5 are parallel to each other and perpendicular to the measuring straight ruler 3. A first measuring member 41 is fixedly connected to the side of the fixed claw 4 close to the moving claw 5. The end of the first measuring member 41 away from the fixed claw 4 faces the moving claw 5. A second measuring member 51 is fixedly connected to the side of the moving claw 5 close to the fixed claw 4. The end of the second measuring member 51 away from the moving claw 5 faces the fixed claw 4. And the first measuring member 41 is located at the end of the fixed claw 4 away from the measuring straight ruler 3, and the second measuring member 51 is located at the end of the moving claw 5 away from the measuring straight ruler 3. Both the first measuring member 41 and the second measuring member 51 are perpendicular to the fixed claw 4 and the moving claw 5. The first measuring member 41 is used to abut against one side of the Marshall specimen 2, and the second measuring member 51 is used to abut against the side of the Marshall specimen 2 away from the second measuring member 51. Along the length direction of the measuring straight ruler 3, the second measuring member 51 approaches or moves away from the side of the Marshall specimen 2 away from the first measuring member 41.

[0040] When measuring the Marshall specimen 2, slide the sliding moving jaw 5 so that the first measuring member 41 is in contact with the second measuring member 51. Read the fixed value at the position of the moving jaw 5 on the measuring ruler 3 at this moment. Push the moving jaw 5 to make it slide on the measuring ruler 3, separate the first measuring member 41 from the second measuring member 51, and form a clamping area between the first measuring member 41 and the second measuring member 51. Place the Marshall specimen 2 in the clamping area, move the Marshall specimen 2 so that the first measuring member 41 abuts against one side of the Marshall specimen 2, slide the moving jaw 5 so that the second test piece abuts against the side of the Marshall specimen 2 away from the first test piece, and make the opposite ends of the first measuring member 41 and the second measuring member 51 abut against the opposite sides of the Marshall specimen 2 respectively, so as to clamp and fix the position of the Marshall specimen 2. Read the measured value at the position of the moving jaw 5 on the measuring ruler 3 at this moment. The measured value minus the fixed value is the magnitude of the moving displacement of the moving jaw 5 at these two moments, which is the height of the Marshall specimen 2, thus reflecting the height of the Marshall specimen 2. There is no need to measure and calculate the Marshall test mold 1 and the Marshall specimen 2 multiple times, simplifying the measurement steps and improving the measurement efficiency.

[0041] Both the first measuring member 41 and the second measuring member 51 are provided with abutting members 6. The abutting members 6 are symmetrically arranged and are respectively located at one end of the first measuring member 41 away from the fixed jaw 4 and one end of the second measuring member 51 away from the moving jaw 5. In this embodiment, the abutting member 6 is a rectangular block. The abutting member 6 is perpendicular to the first measuring member 41 and the second measuring member 51. The abutting member 6 is provided with an abutting surface 61. The abutting surface 61 is located on the side where the two abutting members 6 are close to each other, and the abutting surface 61 is perpendicular to the length direction of the measuring ruler 3. The area of the abutting surface 61 is larger than the area of the side of the first measuring member 41 close to the moving jaw 5. The area of the abutting surface 61 is larger than the area of the side of the second measuring member 51 close to the fixed jaw 4.

[0042] Increase the contact area with the Marshall specimen 2, improve the clamping stability of the Marshall specimen 2, reduce the possibility of large errors in the measurement data caused by the relaxation of the Marshall specimen 2, and improve the measurement accuracy.

[0043] To further improve the accuracy of the measurement data, the extended central axes of the first measuring member 41 and the second measuring member 51 are located on the same straight line.

[0044] To improve the convenience of reading, the moving jaw 5 is fixedly connected with a display 7. The display 7 is slidably connected with the measuring ruler 3. The display 7 is used to display the distance between the two abutting surfaces 61. When the abutting surfaces of the two abutting members are in contact, the value displayed on the display 7 is zero at this time.

[0045] The implementation principle of Embodiment 1 is as follows: When measuring the Marshall specimen 2, move the moving claw 5 to make the two abutting surfaces 61 in contact with each other, adjust the value on the display 7 so that the value on the display 7 at this time is zero, reduce the subsequent measurement error, improve the measurement accuracy, then slide the moving claw 5, and the two abutting surfaces 61 abut against both sides of the Marshall specimen 2 to clamp the Marshall specimen 2. At this time, the value on the display 7 is the distance between the two abutting members 6, and it is also the sliding displacement of the moving claw 5 at two moments. The value on the display 7 is the height of the Marshall specimen 2. By directly reading the data on the display 7, the height value of the Marshall specimen can be obtained, and by directly comparing, it can be quickly judged whether the height of the Marshall specimen 2 meets the specification requirements, improving the measurement efficiency.

[0046] Embodiment 2

[0047] Referring to Figure 2 and Figure 3 , the difference between this application and Embodiment 1 is that the abutting member 6 is detachably connected to the first measuring member 41 or the second measuring member 51.

[0048] When the area of the abutting surface 61 is much smaller than the area of the test surface of the Marshall specimen 2, the abutting member 6 can be replaced so that when the area of the abutting surface 61 satisfies being smaller than the area of the surface of the Marshall specimen 2, the area of the abutting surface 61 is close to the area of the surface of the Marshall specimen 2, further improving the stability of clamping the Marshall specimen 2.

[0049] On one side of both abutting members 6 away from the abutting surface 61, a plug rod 8 is fixedly connected. The length direction of the plug rod 8 is perpendicular to the abutting surface 61, and the length direction of the plug rod 8 is parallel to the length direction of the measuring ruler 3. On one end side of the first measuring member 41 and the second measuring member 51 close to each other, a socket groove 81 is opened for the plug rod 8 to penetrate. The plug rod 8 is inserted into the socket groove 81, and the side wall of the plug rod 8 abuts against the groove wall of the socket groove 81, so that the plug rod 8 is inserted and connected to the first measuring member 41 or the second measuring member 51, and one side of the abutting member 6 away from the abutting surface 61 abuts against the first measuring member 41 or the second measuring member 51.

[0050] When replacing the abutting member 6, insert or pull out the plug rod 8 from the socket groove 81. The groove wall of the socket groove 81 abuts against the outer wall of the plug rod 8, and one side of the abutting member 6 away from the abutting surface 61 abuts against the first measuring member 41 or the second measuring member 51, which can make the abutting member 6 be quickly disassembled and assembled on the first measuring member 41 or the second measuring member 51, reduce the replacement time of the abutting member 6, and thus improve the measurement efficiency.

[0051] The abutting member 6 is provided with a locking assembly 82. The insertion rod 8 is fixed to the first measuring member 41 or the second measuring member 51 through the locking assembly 82, so that the abutting member 6 is fixed to the first measuring member 41 or the second measuring member 51. In this embodiment, the locking assembly 82 adopts bolts and nuts. When the abutting member 6 needs to be fixed on the first measuring member 41, the bolt is inserted through the first measuring member 41 and the insertion rod 8. The head of the bolt abuts against the side wall of the first measuring member 41, and the tail of the bolt is threadedly connected to the nut. The nut is tightened, and the nut abuts against the side wall of the first measuring member 41 away from the head of the bolt. When the abutting member 6 needs to be fixed on the second measuring member 51, the bolt is inserted through the second measuring member 51 and the insertion rod 8. The head of the bolt abuts against the side wall of the second measuring member 51, and the tail of the bolt is threadedly connected to the nut. The nut is tightened, and the nut abuts against the side wall of the second measuring member 51 away from the head of the bolt.

[0052] To reduce the possibility of the insertion rod 8 rotating in the socket groove 81 and improve the installation stability of the abutting member 6, the extended cross-section of the insertion rod 8 is polygonal. In this embodiment, the extended cross-section of the insertion rod 8 is rectangular.

[0053] The implementation principle of Embodiment 2 is as follows: When the abutting member 6 needs to be replaced, the locking assembly 82 is removed from the abutting member 6, and the insertion rod 8 is taken out of the socket groove 81, so as to disassemble the abutting member 6 from the first measuring member 41 or the second measuring member 51. A new abutting member 6 is placed between the first measuring member 41 and the second measuring member 51, the insertion rod 8 is inserted into the socket groove 81, and then the locking assembly 82 is used to fix the insertion rod 8 in the socket groove 81, so as to fix and install the abutting member 6 on the first measuring member 41 or the second measuring member 51, thereby realizing the disassembly and assembly operation of the abutting member 6. When the area of the abutting surface 61 is smaller than the area of the surface of the Marshall specimen 2 and the area of the abutting surface 61 is close to the area of the surface of the Marshall specimen 2, the stability of clamping the Marshall specimen 2 is further improved.

[0054] Embodiment 3

[0055] Refer to Figure 4 , the difference between this application and Embodiment 1 is that the abutting surface 61 is circular, and the diameter of the abutting member 6 is smaller than the diameter of the Marshall specimen 2. When the abutting surface 61 abuts against the surface of the Marshall specimen 2, the contact area between the abutting surface 61 and the Marshall specimen 2 is increased, so that the abutting member 6 stably clamps the Marshall specimen 2, improving the accuracy during the measurement of the Marshall specimen 2, and thus improving the measurement efficiency.

[0056] The implementation principle of Embodiment 3 is that the abutting surface 61 is circular, increasing the contact area between the abutting member 6 and the Marshall specimen 2, thereby improving the measurement efficiency.

[0057] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A Marshall specimen height measuring ruler for asphalt mixture, characterized in that: include: Measuring ruler (3); The measuring clamp comprises a fixed claw (4) and a movable claw (5), wherein the fixed claw (4) is fixed to one end of the measuring ruler (3), and the movable claw (5) is slidably connected to the measuring ruler (3); A first measuring piece (41) connected to the fixed claw (4), wherein one end of the first measuring piece (41) away from the fixed claw (4) faces the movable claw (5); The second measuring piece (51) is connected to the movable claw (5), and one end of the second measuring piece (51) away from the movable claw (5) faces the fixed claw (4).

2. The asphalt mixture Marshall specimen height measuring ruler according to claim 1, characterized in that: Abutment members (6) are provided on the sides where the first measuring member (41) and the second measuring member (51) are close to each other. The abutment members (6) are symmetrically arranged. The abutment members (6) are provided with abutment surfaces (61). The abutment surfaces (61) are located on the sides where the two abutment members (6) are close to each other. The abutment surfaces (61) are perpendicular to the length direction of the measuring ruler (3). The area of ​​the abutment surfaces (61) is larger than the area of ​​the side of the first measuring member (41) close to the movable claw (5). The area of ​​the abutment surfaces (61) is larger than the area of ​​the side of the second measuring member (51) close to the fixed claw (4).

3. The asphalt mixture Marshall specimen height measuring ruler according to claim 2, characterized in that: The abutment member (6) is detachably connected to the first measuring member (41) or the second measuring member (51).

4. The asphalt mixture Marshall specimen height measuring ruler according to claim 3, characterized in that: One end of the abutment member (6) is connected to an insertion rod (8), and the first measuring member (41) and the second measuring member (51) are both provided with a socket groove (81) matching the insertion of the insertion rod (8), and the insertion rod (8) is inserted into the socket groove (81).

5. The asphalt mixture Marshall specimen height measuring ruler according to claim 4, characterized in that: The extended cross section of the insertion rod (8) is polygonal.

6. The asphalt mixture Marshall specimen height measuring ruler according to claim 2, characterized in that: The abutment member (6) is provided with a locking assembly (82), and the abutment member (6) is fixed to the first measuring member (41) or the second measuring member (51) via the locking assembly (82).

7. The asphalt mixture Marshall specimen height measuring ruler according to claim 2, characterized in that: The abutting surface (61) is circular.

8. The asphalt mixture Marshall specimen height measuring ruler according to claim 2, characterized in that: The movable claw (5) is connected to a display (7), and the display (7) is used to display the distance between the two abutting surfaces (61).

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