Vertical asphalt mixture Marshall test piece measuring device

Abstract

A vertical asphalt mixture Marshall test piece measuring device comprises a device shell, a side opening is formed in the side portion of the device shell, at least three sliding columns located on a bottom plate are arranged in the device shell, and a plurality of vertical guide rods are further fixedly arranged on the periphery of the bottom plate; a lifting disc is arranged in the device shell, supporting rods are arranged on the periphery of the lifting disc, sleeves are arranged at the ends of the supporting rods, and the multiple sleeves are arranged on the multiple vertical guide rods in a sleeving mode; one of the vertical guide rods is provided with an external thread, and the sleeve is in threaded fit with the external thread; wherein one vertical guide rod is provided with scales, a rotating disc is arranged at the bottom of the lifting disc, a fixed ejector rod is arranged on the bottom face of the rotating disc, and the lower end of a sleeve arranged on the vertical guide rod with the scales extends to be located on the same horizontal plane with the fixed ejector rod. The Marshall test piece measuring device can replace manual work to measure a Marshall test piece, and the accuracy of test piece measurement data is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of Marshall testing, in particular to a vertical asphalt mixture Marshall test piece measuring device. Background Art

[0002] The Marshall test is used to determine the optimal asphalt-to-aggregate ratio in asphalt mixtures. The test involves compacting the specimen under specified temperature and humidity conditions to determine the mixture's stability and flow rate.

[0003] After the Marshall test specimen completes the compaction operation, the thickness of the specimen inside the mold needs to be measured. Since the height of the specimen after impact is smaller than the height of the mold outside it, the measurement is generally performed by measuring the height difference between the two ends of the specimen and the end face of the mold, and then the final specimen height is determined by subtracting the height difference measured on both sides from the height of the entire mold. The entire measurement process relies on manual labor, and the measurement error is large, which affects the accuracy of the final test results. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a vertical asphalt mixture Marshall specimen measuring device, which can replace manual Marshall specimen measurement work and effectively improve the accuracy of specimen measurement data.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a vertical asphalt mixture Marshall specimen measuring device, comprising a device housing, a side opening being opened on the side of the device housing, at least three sliding columns located on a bottom plate are provided in the device housing, and a plurality of vertical guide rods are fixedly provided on the periphery of the bottom plate;

[0006] The device housing is provided with a lifting plate, and support rods are provided around the lifting plate. The ends of the support rods are provided with sleeves, and the multiple sleeves are respectively sleeved on multiple vertical guide rods;

[0007] One of the vertical guide rods is provided with an external thread, and the sleeve is threadably engaged with the external thread;

[0008] One of the vertical guide rods is provided with a scale, a rotating disk is provided at the bottom of the lifting plate, a fixed top rod is provided on the bottom surface of the rotating disk, and the lower end of the sleeve arranged on the vertical guide rod with the scale extends to be on the same horizontal plane as the fixed top rod.

[0009] In the preferred solution, the base plate is provided with at least three slide grooves radiating outward from the center of the base plate, the lower end of the sliding column is arranged in the slide groove, and a tension spring is provided in the slide groove. The two ends of the tension spring are respectively connected and fixed to one end of the slide groove and the sliding column, and the tension spring is used to control the sliding column to move toward the outer end of the slide groove.

[0010] In a preferred solution, a first motor and a second motor are provided on the top of the device housing, the first motor is used to control the rotation of the rotating disk, and the second motor is used to control the rotation of the vertical guide rod with external threads.

[0011] In a preferred solution, the vertical guide rod with the external thread is movably connected to the base plate.

[0012] In a preferred embodiment, a boss is provided on the top surface of the rotating disk, which passes through the lifting disk. The lifting disk and the rotating disk are movably connected. The driving shaft of the first motor is downward and is connected to a first motor transmission rod. The first motor transmission rod passes through the boss and is connected to the boss through a keyway.

[0013] In a preferred solution, a control panel is further provided on the top of the device housing, and the control panel is used to control the start and stop of the first motor and the second motor.

[0014] The vertical asphalt mixture Marshall specimen measuring device provided by the utility model has the following beneficial effects by adopting the above structure:

[0015] (1) The movable sliding column can ensure the stability of the Marshall specimen during support, thus avoiding the deviation of the measurement results caused by the shaking of the Marshall specimen;

[0016] (2) The design of the scale and the extended sleeve allows the operator to read the thickness data of the test piece intuitively, avoiding reading errors caused by sight angle problems;

[0017] (3) The device directly replaces manual measurement, effectively avoiding data errors caused by manual measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0021] Figure 3 This is a schematic diagram of the bottom plate structure from a top view of the present invention.

[0022] Figure 4 Schematic diagram of the existing Marshall specimen structure.

[0023] In the figure: device housing 1, bottom plate 101, side opening 2, slide groove 3, tension spring 301, sliding column 4, vertical guide rod 5, external thread 6, scale 7, lifting plate 8, support rod 9, sleeve 10, rotating plate 11, boss 111, fixed top rod 12, first motor 13, first motor transmission rod 131, second motor 14, control panel 15. DETAILED DESCRIPTION

[0024] like Figure 1 A vertical asphalt mixture Marshall specimen measuring device includes a device housing 1, a side opening 2 is formed on the side of the device housing 1, at least three sliding columns 4 are provided on the bottom plate 101, and a plurality of vertical guide rods 5 are fixed to the periphery of the bottom plate 101;

[0025] The device housing 1 is provided with a lifting plate 8, and the lifting plate 8 is surrounded by support rods 9. The ends of the support rods 9 are provided with sleeves 10, and multiple sleeves 10 are respectively sleeved on multiple vertical guide rods 5;

[0026] One of the vertical guide rods 5 is provided with an external thread 6, and the sleeve 10 is threadedly engaged with the external thread 6;

[0027] One of the vertical guide rods 5 is provided with a scale 7, a rotating disk 11 is provided at the bottom of the lifting disk 8, a fixed top rod 12 is provided on the bottom surface of the rotating disk 11, and the lower end of the sleeve 10 arranged on the vertical guide rod 5 with the scale 7 extends to the same horizontal plane as the fixed top rod 12.

[0028] In the preferred embodiment, the base plate 101 is provided with at least three slide grooves 3 radiating outward from the center of the base plate 101, the lower end of the sliding column 4 is arranged in the slide groove 3, and a tension spring 301 is provided in the slide groove 3. The two ends of the tension spring 301 are respectively connected and fixed to one end of the slide groove 3 and the sliding column 4. The tension spring 301 is used to control the sliding column 4 to move toward the outer end of the slide groove 3.

[0029] In a preferred solution, a first motor 13 and a second motor 14 are provided on the top of the device housing 1 . The first motor 13 is used to control the rotation of the rotating disk 11 , and the second motor 14 is used to control the rotation of the vertical guide rod 5 with the external thread 6 .

[0030] In a preferred solution, the vertical guide rod 5 with the external thread 6 is movably connected to the base plate 101 .

[0031] In a preferred embodiment, a boss 111 is provided on the top surface of the rotating disk 11, and the boss 111 is arranged through the lifting disk 8. The lifting disk 8 and the rotating disk 11 are movably connected. The driving shaft of the first motor 13 is downward and the shaft is connected to a first motor transmission rod 131. The first motor transmission rod 131 passes through the boss 111 and is connected to the boss 111 through a key groove.

[0032] In a preferred solution, a control panel 15 is further provided on the top of the device housing 1 , and the control panel 15 is used to control the start and stop of the first motor 13 and the second motor 14 .

[0033] When using the above-mentioned vertical asphalt mixture Marshall specimen measuring device to perform Marshall specimen measurement operations:

[0034] The Marshall specimen to be tested is placed on the multiple sliding columns 4 on the base plate 101, and the tension spring 301 is used to ensure that the bottom surface of the sample in the Marshall specimen contacts the sliding columns 4 and ensure the stability of the sample on the sliding columns 4. After installation, the second motor 14 is started by controlling the control panel 15 to rotate the vertical guide rod with the external thread 6, thereby driving the lifting plate 8 to move downward until the lower end of the fixed top rod 12 contacts the top surface of the sample in the specimen. At this time, the height of the sample in the Marshall specimen can be determined by reading the scale position reading covered by the sleeve 10 on the vertical guide rod 5 with the scale 7.

[0035] After completing the above measurement operation, the device is reset, and then the second motor 14 is controlled by the control panel 15 to start and rotate 120°, so that the position of the fixed push rod 12 changes, and then the measurement is repeated twice. The average of the three measurement results is taken to obtain the final measurement result.

Claims

1. A vertical asphalt mixture Marshall specimen measuring device, comprising a device housing (1), characterized in that: A side opening (2) is provided on the side of the device housing (1), and at least three sliding columns (4) located on the bottom plate (101) are provided inside the device housing (1), and a plurality of vertical guide rods (5) are fixedly provided on the periphery of the bottom plate (101); A lifting plate (8) is provided in the device housing (1), support rods (9) are provided around the lifting plate (8), sleeves (10) are provided at the ends of the support rods (9), and the plurality of sleeves (10) are respectively sleeved on the plurality of vertical guide rods (5); One of the vertical guide rods (5) is provided with an external thread (6), and the sleeve (10) is threadably engaged with the external thread (6); A scale (7) is provided on one of the vertical guide rods (5), a rotating disk (11) is provided at the bottom of the lifting plate (8), a fixed top rod (12) is provided on the bottom surface of the rotating disk (11), and the lower end of the sleeve (10) provided on the vertical guide rod (5) with the scale (7) extends to be on the same horizontal plane as the fixed top rod (12).

2. The vertical asphalt mixture Marshall specimen measuring device according to claim 1, characterized in that: The base plate (101) is provided with at least three slide grooves (3) extending radially outward from the center of the base plate (101), the lower end of the sliding column (4) is arranged in the slide groove (3), and a tension spring (301) is provided in the slide groove (3), and the two ends of the tension spring (301) are respectively connected and fixed to one end of the slide groove (3) and the sliding column (4), and the tension spring (301) is used to control the sliding column (4) to move toward the outer end of the slide groove (3).

3. The vertical asphalt mixture Marshall specimen measuring device according to claim 1, characterized in that: A first motor (13) and a second motor (14) are provided on the top of the device housing (1); the first motor (13) is used to control the rotation of the rotating disk (11); and the second motor (14) is used to control the rotation of the vertical guide rod (5) with an external thread (6).

4. The vertical asphalt mixture Marshall specimen measuring device according to claim 3, characterized in that: The vertical guide rod (5) with the external thread (6) is movably connected to the bottom plate (101).

5. The vertical asphalt mixture Marshall specimen measuring device according to claim 3, characterized in that: A boss (111) is provided on the top surface of the rotating disk (11), and the boss (111) passes through the lifting disk (8). The lifting disk (8) and the rotating disk (11) are movably connected. The driving shaft of the first motor (13) is downward and is connected to a first motor transmission rod (131). The first motor transmission rod (131) passes through the boss (111) and is connected to the boss (111) via a keyway.

6. The vertical asphalt mixture Marshall specimen measuring device according to claim 3, characterized in that: A control panel (15) is also provided on the top of the device housing (1), and the control panel (15) is used to control the start and stop of the first motor (13) and the second motor (14).

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