Asphalt concrete hardness detection device

Abstract

The utility model belongs to the technical field of asphalt concrete detection, and provides an asphalt concrete hardness detection device which comprises a machine table, a vertical frame is arranged on the machine table, a sliding seat and a short plate are respectively arranged on the vertical frame from top to bottom, the sliding seat is installed in a sliding mode, and the short plate is fixedly installed. A pressure sensor is downwards arranged on the sliding seat, a guide sleeve is arranged on the short plate, a sensing rod of the pressure sensor penetrates out of the guide sleeve and is provided with a pressure ball, a connecting rod downwards penetrates into the sliding seat, and the bottom of the connecting rod is connected with the short plate. When the device is used for detecting the hardness of an asphalt concrete sample, firstly, the clamping mechanism clamps the asphalt concrete sample, the driving cylinder drives the sliding seat to move downwards, the pressure sensor drives the pressure ball to move towards the asphalt concrete sample, the pressure ball extrudes the sample until the sample deforms, and the numerical value of the pressure sensor is recorded; the numerical value is the hardness parameter of the asphalt concrete sample.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt concrete detection, and in particular relates to an asphalt concrete hardness detection device. Background Art

[0002] At present, with the increasingly accelerated pace of economic development, all walks of life have achieved rapid development. In order to better promote the construction of my country's infrastructure, my country's highway construction projects have also been significantly enhanced compared with before. In all stages of highway construction, highway roadbed engineering is one of the most important contents. Its quality is directly related to the quality of the highway, providing the most reliable guarantee for people's safe travel.

[0003] Asphalt concrete is widely used in road construction. During the acceptance of asphalt concrete, the hardness of the sample can be tested by a hardness testing device to determine whether the hardness of the asphalt concrete meets the requirements. When testing with the existing hardness testing device, the pressure sensor is generally pressed down so that the pressure ball connected to the pressure rod of the pressure sensor squeezes the test sample. When the asphalt concrete is deformed, the hardness parameter of the asphalt concrete is obtained through the pressure sensor. Although the hardness parameter of the asphalt concrete can be tested in this way, the pressure rod is always under force during the test, which may cause it to shake slightly and affect the test results. Utility Model Content

[0004] In view of the above problems, the purpose of the present utility model is to provide an asphalt concrete hardness detection device, aiming to solve the problem that the detection results of the existing asphalt concrete hardness detection device are not very accurate during detection.

[0005] The utility model adopts the following technical scheme: the asphalt concrete hardness detection device includes a machine platform, a vertical frame is provided on the machine platform, a slide seat and a short plate are respectively provided on the vertical frame from top to bottom, wherein the slide seat is slidably installed and the short plate is fixedly installed, a pressure sensor is provided downwardly on the slide seat, a guide sleeve is provided on the short plate, the sensing rod of the pressure sensor passes through the guide sleeve and is provided with a pressure ball, a connecting rod is inserted downwardly on the slide seat, the bottom of the connecting rod is connected to the short plate, a spring is provided on the connecting rod and between the short plate and the slide seat, a driving cylinder for driving the slide seat to move up and down is provided on the top of the vertical frame, and a clamping mechanism is also provided on the machine platform.

[0006] Furthermore, the clamping mechanism includes a base, a pair of clamping blocks are slidably provided on the base, a support platform is provided on the base between the two clamping blocks, a positioning disc is provided on the support platform, a pair of rotating plates are provided on the side walls of the base corresponding to each clamping block, a sliding cylinder is provided upward inside the machine, a driving block is provided on the driving shaft of the sliding cylinder, the upper end of the rotating plate is rotatably connected to the clamping block, and the lower end is slidably installed on the side wall of the driving block.

[0007] Furthermore, a slide groove is formed at the lower end of the rotating plate, a guide column is inserted into the slide groove, and the end of the guide column is fixed on the driving block.

[0008] Furthermore, the slide seat includes a slider with a 7-shaped structure, the bottom of the slider is formed with an edge facing outward, the connecting rod is inserted downwardly into the edge, and the bottom of the slider is provided with an avoidance hole corresponding to the connecting rod.

[0009] The beneficial effect of the utility model is that when the device is used to detect the hardness of an asphalt concrete sample, the clamping mechanism is first used to clamp the asphalt concrete sample, and then the slide is driven downward by driving the cylinder. At this time, the pressure sensor drives the pressure ball to move toward the asphalt concrete sample, and the pressure ball squeezes the asphalt concrete sample until the asphalt concrete sample is deformed. The value of the pressure sensor is recorded, and this value is the hardness parameter of the asphalt concrete sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model provides an overall diagram of an asphalt concrete hardness detection device.

[0011] Figure 2 The utility model provides a schematic diagram of the slide structure.

[0012] Figure 3 The utility model provides a schematic diagram of the clamping mechanism structure. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0014] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0015] For the convenience of explanation, only the parts related to the embodiment of the present utility model are shown.

[0016] Combination Figure 1-3As shown, the asphalt concrete hardness detection device includes a machine platform 1, a vertical frame 2 is provided on the machine platform 1, and a slide 3 and a short plate 4 are provided on the vertical frame 2 from top to bottom, wherein the slide 3 is slidably installed and the short plate 4 is fixedly installed, a pressure sensor 5 is provided downwardly on the slide 3, a guide sleeve 6 is provided on the short plate 4, the sensing rod of the pressure sensor 5 passes through the guide sleeve and is provided with a pressure ball 7, a connecting rod 8 is inserted downwardly on the slide 3, the bottom of the connecting rod 8 is connected to the short plate 4, a spring 9 is provided on the connecting rod 8 and between the short plate 4 and the slide 3, a driving cylinder 10 for driving the slide 3 to move up and down is provided on the top of the vertical frame 2, and a clamping mechanism is also provided on the machine platform 1.

[0017] Asphalt concrete is widely used in road construction. When the asphalt concrete is paved and accepted, its hardness can be tested by this device. Specifically: first, the asphalt concrete needs to be cored to obtain multiple groups of asphalt concrete samples, and then the hardness of multiple groups of asphalt concrete samples is tested one by one using this device and recorded. Finally, multiple groups of test values ​​are used to determine whether the asphalt concrete meets the hardness requirements.

[0018] When using this device to detect the hardness of an asphalt concrete sample, first use the clamping mechanism to clamp the asphalt concrete sample, then drive the slide to move downward by driving the cylinder, at this time the pressure sensor drives the pressure ball to move toward the asphalt concrete sample, the pressure ball squeezes the asphalt concrete sample until the asphalt concrete sample is deformed, and the value of the pressure sensor is recorded, which is the hardness parameter of the asphalt concrete sample. Finally, the slide is reset.

[0019] When the slide moves downward, the spring is gradually compressed. Under the action of the spring, the pressure ball can squeeze the asphalt concrete sample more stably, and the measured hardness parameters are more accurate. In addition, during the measurement process, the sensing rod of the pressure sensor is always under force, and the guide sleeve plays the role of guiding and limiting the sensing rod. At the same time, the guide sleeve also plays the role of protecting the sensing rod to a certain extent, further making the entire detection process more stable.

[0020] As a preferred structure, Figure 2 The slide seat 3 includes a slider 31 of a 7-shaped structure, the bottom of the slider 31 is formed with an edge 32 facing outward, the edge 32 is penetrated downward by the connecting rod 8, the top of the connecting rod is provided with a nut, and the bottom of the slider 31 is provided with an avoidance hole 11 corresponding to the connecting rod.

[0021] In this structure, the slide seat is used as a carrier for installing the pressure sensor. When the slide seat slides downward, it moves downward along the height direction of the connecting rod, and the spring is gradually compressed. If it moves to the bottom of the connecting rod, the top of the connecting rod penetrates into the avoidance hole.

[0022] like Figure 1-2 A pair of guide rods 12 are inserted into the top of the stand 2, and the driving cylinder 10 is located between the two guide rods 12, and the bottom of the guide rod 12 is connected to the slide 3. When the driving cylinder drives the slide to slide up and down, the two guide rods move up and down accordingly, and under the guidance of the guide rods, the slide can be more stable during the sliding process.

[0023] In this device, if Figure 1 , Figure 3 The clamping mechanism includes a base 13, on which a pair of clamping blocks 14 are provided, a support platform 15 is provided between the two clamping blocks 14 on the base 13, and a positioning disc 16 is provided on the support platform 15. A pair of rotating plates 17 are provided on the side walls of the base 13 corresponding to each clamping block 14, a sliding cylinder 18 is provided upward in the machine 1, and a driving block 19 is provided on the driving shaft of the sliding cylinder 18, and the upper end of the rotating plate 17 is rotatably connected to the clamping block 14, and the lower end is slidably installed on the side wall of the driving block 19.

[0024] When the clamping mechanism is used to clamp the asphalt concrete sample, the asphalt concrete sample is first placed on the positioning disc for preliminary positioning, and then the sliding cylinder drives the driving block to move downward. During this process, the lower ends of the two pairs of rotating plates rotate outward and the upper ends rotate inward, thereby driving the two clamping blocks to move toward each other until the asphalt concrete sample is clamped.

[0025] The lower end of the rotating plate 17 is provided with a slide groove 20, into which a guide column 21 is inserted, and the end of the guide column 21 is fixed on the driving block 19, and a nut is provided on the top of the guide column. When the sliding cylinder drives the driving block to move downward, the guide column also moves downward at this time. During the movement of the guide column, the guide column moves in the slide groove and drives the bottom of the rotating plate to rotate outward, thereby driving the two clamping blocks to move toward each other and clamp the asphalt concrete sample. The front end of the clamping block is a V-shaped structure, which is convenient for clamping the asphalt concrete sample.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the present utility model.

Claims

1. An asphalt concrete hardness detection device, characterized in that: The asphalt concrete hardness detection device includes a machine platform, a vertical frame is provided on the machine platform, and a slide and a short plate are provided on the vertical frame from top to bottom, wherein the slide is slidably installed and the short plate is fixedly installed, a pressure sensor is provided downwardly on the slide, a guide sleeve is provided on the short plate, the sensing rod of the pressure sensor passes through the guide sleeve and is provided with a pressure ball, a connecting rod is inserted downwardly on the slide, the bottom of the connecting rod is connected to the short plate, a spring is provided on the connecting rod and between the short plate and the slide, a driving cylinder for driving the slide to move up and down is provided on the top of the vertical frame, and a clamping mechanism is also provided on the machine platform.

2. An asphalt concrete hardness testing device as claimed in claim 1, characterized in that: The clamping mechanism includes a base, a pair of clamping blocks are slidably provided on the base, a support platform is provided on the base between the two clamping blocks, a positioning disk is provided on the support platform, a pair of rotating plates are provided on the side walls of the base corresponding to each clamping block, a sliding cylinder is provided upward inside the machine, a driving block is provided on the driving shaft of the sliding cylinder, the upper end of the rotating plate is rotatably connected to the clamping block, and the lower end is slidably installed on the side wall of the driving block.

3. An asphalt concrete hardness testing device as claimed in claim 2, characterized in that: A slide groove is formed at the lower end of the rotating plate, a guide column is inserted into the slide groove, and the end of the guide column is fixed on the driving block.

4. An asphalt concrete hardness testing device as claimed in claim 3, characterized in that: The slide seat comprises a slider of a 7-shaped structure, the bottom of the slider is formed with an edge facing outward, the connecting rod is inserted downward into the edge, and an avoidance hole is formed at the bottom of the slider corresponding to the connecting rod.

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