A simple device for measuring the thickness of asphalt paving

Abstract

A simple asphalt paving thickness measuring device includes a base plate, which is fixedly connected to a top seat via a vertical rod. A screw drive mechanism is mounted on the top seat, driving a movable plate to move up and down. At least one insertion rod is fixed to the lower end of the movable plate, aligning with a through hole on the base plate. A scale is vertically mounted on the lower end of the top seat, and an indicator slider is slidably mounted on the scale. The other end of the indicator slider is fixedly connected to the movable plate via a connecting rod. This simple asphalt paving thickness measuring device provides automatic vertical insertion, making operation more labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of asphalt concrete pavement construction, and in particular to a simple device for measuring asphalt paving thickness. Background Technology

[0002] During the construction of the pavement surface layer for newly built and reconstructed tunnels on highways of all grades, it is necessary to strictly control the amount of flame-retardant asphalt mixture and the aggregate gradation, and to test the compaction degree and thickness to provide a scientific and accurate basis for construction. The patent application number "202221850252.X" entitled "An Asphalt Paving Thickness Measuring Device" describes a device that can determine the asphalt paving thickness by the distance the scale is moved, without the need for bending over to rotate and read the value. However, this device requires manual insertion, which is hindered by the asphalt and involves high labor intensity. Furthermore, the device's single measuring rod is inserted into the asphalt concrete; during insertion, the rod may not be perfectly perpendicular to the asphalt concrete surface due to human operation, affecting the measurement accuracy. Utility Model Content The technical problem to be solved by this utility model is to provide a simple asphalt paving thickness measuring device, which makes measuring asphalt paving thickness more convenient and simple, and has higher accuracy than the above-mentioned prior art.

[0003] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A simple asphalt paving thickness measuring device includes a base plate, which is fixedly connected to a top seat via a vertical rod; a screw drive mechanism is installed on the top seat, which drives a movable plate to move up and down; at least one insertion rod is fixed at the lower end of the movable plate, and the insertion rod is aligned with a through hole on the base plate; a scale is vertically installed at the lower end of the top seat, and an indicator slider is slidably installed on the scale, with the other end of the indicator slider fixedly connected to the movable plate via a connecting rod.

[0004] The lead screw drive mechanism includes a first lead screw and a second lead screw, both of which are threadedly connected to a movable plate; the upper ends of the first lead screw and the second lead screw are rotatably connected to a top seat via bearings; the top ends of the first lead screw and the second lead screw extend out of the top seat and are driven to rotate synchronously via a synchronous belt transmission mechanism.

[0005] The synchronous belt conveyor mechanism includes a first synchronous single wheel coaxially mounted with the first lead screw, a synchronous double wheel coaxially mounted with the second lead screw, a servo motor mounted on the top seat, a second synchronous single wheel mounted on the output end of the servo motor, a first synchronous belt wound around the first synchronous single wheel and the synchronous double wheel, and a second synchronous belt wound around the synchronous double wheel and the second synchronous single wheel.

[0006] The first lead screw and the second lead screw are symmetrically distributed on the movable plate and arranged vertically.

[0007] Both the first lead screw and the second lead screw have a limiting plate at their bottom ends.

[0008] A brush ring can be detachably installed at the through hole on the base plate, with the inner side of the brush ring contacting the outer wall of the insertion rod.

[0009] A rubber plate is fixed at the lower end of the top seat, directly opposite the indicator slider.

[0010] This utility model provides a simple device for measuring asphalt paving thickness, which has the following technical advantages: Compared to the patent application number "202221850252.X" entitled "An Asphalt Paving Thickness Measuring Device": 1) By using a screw-driven mechanism to insert or retract the insertion rod, it requires less effort. Furthermore, through a reasonable height design, it can be viewed without bending over; 2) Because the insertion rod is fixed to the movable plate and perpendicular to the base plate, and the base plate is in direct contact with the asphalt surface and parallel to the asphalt surface, it ensures that the insertion rod is perpendicular to the asphalt surface. This ensures that the insertion depth is the thickness of the asphalt paving layer, avoiding inaccurate measurements due to rod tilting. Simultaneously, the base plate's direct contact with the asphalt surface provides better stability. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the first working state of this utility model.

[0012] Figure 2 This is a schematic diagram of the second working state of this utility model (L is the asphalt paving thickness).

[0013] Figure 3 This is a top view of the synchronous belt conveyor mechanism in this utility model.

[0014] Figure 4 This is a schematic diagram of the scale ruler in this utility model.

[0015] In the diagram: base plate 1, upright 2, top seat 3, lead screw drive mechanism 4, movable plate 5, insert rod 6, through hole 7, scale 8, indicator slider 9, connecting rod 10, brush ring 11, rubber plate 12, first lead screw 4.1, second lead screw 4.2, first synchronous single wheel 4.3, synchronous double wheel 4.4, servo motor 4.5, second synchronous single wheel 4.6, first synchronous belt 4.7, second synchronous belt 4.8, limit plate 4.9. Detailed Implementation

[0016] like Figure 1-2As shown, a simple asphalt paving thickness measuring device includes a base plate 1, which is circular. A vertical rod 2 is fixed at the center of the upper surface of the base plate 1, with the height of the rod 2 approximately three-quarters of a person's height. This facilitates direct observation of the readings on the scale 8 later. The vertical rod 2 is vertically upward and connected and fixed to a top seat 3 to form a whole. A screw drive mechanism 4 is installed on the top seat 3, which drives a movable plate 5 directly below the top seat 3 to move freely up and down. The movable plate 5 has a through hole in its center, the diameter of which is larger than the diameter of the vertical rod 2, allowing the vertical rod 2 to pass through freely. At least two insertion rods 6 are fixed at the lower end of the movable plate 5 away from the through hole. The insertion rods 6 are evenly distributed or symmetrically distributed around the axis of the vertical rod 2. The insertion rods 6 are directly opposite the through holes 7 on the base plate 1. The diameter of the through holes 7 is the same as the diameter of the insertion rods 6, and the lower end of the insertion rods 6 is a pointed tip, facilitating insertion into the asphalt pavement when it is freshly laid and still relatively soft. Because it has a through hole 7, when the insert rod 6 is pulled upwards out of the asphalt pavement, the insert rod 6 can automatically scrape off the asphalt stuck on the insert rod 6 through the through hole 7, thus avoiding adhesion.

[0017] A scale 8 is vertically mounted on the lower end of the top seat 3. The scale 8 has a mounting plate at its top and can be installed using screws. A vertical groove is provided on one side of the scale 8, and an indicator slider 9 is slidably disposed within the groove. The pointed end of one side of the indicator slider 9 points to the scale line of the scale 8. A connecting rod 10 is fixed to the other side of the indicator slider 9, and the connecting rod 10 is connected and fixed to the movable plate 5.

[0018] like Figure 1 As shown, in the reset state, the indicator slider 9 is at the top of the scale 8 and points to the 0 mark on the scale 8. The lower end of the insertion rod 6 is located inside the through hole 7 and is flush with the lower end of the base plate 1. When the device is placed on a freshly laid asphalt road surface, the base plate 1 is in full contact with the asphalt road surface, so that the insertion rod 6 remains perpendicular to the asphalt road surface.

[0019] like Figure 2 As shown, the operator manually holds the top seat 3 and starts the screw drive mechanism 4. The screw drive mechanism 4 drives the movable plate 5, the insertion rod 6, the indicator slider 9, and the connecting rod 10 to move downwards simultaneously. The insertion rod 6 enters the asphalt concrete. After reaching the bottom of the asphalt concrete paving layer, the screw drive mechanism 4 stops. Since the thickness of the insertion rod 6 extending into the asphalt concrete and the distance the indicator slider 9 moves are both L, the reading can be directly obtained by reading the scale indicated by the indicator slider 9 on the upper scale 8.

[0020] like Figures 2-3As shown, the lead screw drive mechanism 4 includes a first lead screw 4.1 and a second lead screw 4.2, which are symmetrically distributed horizontally and vertically arranged on the movable plate 5. Both the first lead screw 4.1 and the second lead screw 4.2 are threadedly connected to threaded holes on the movable plate 5. The upper shafts of both the first lead screw 4.1 and the second lead screw 4.2 are rotatably connected to the top seat 3 via bearings; the top ends of the first lead screw 4.1 and the second lead screw 4.2 extend out of the top seat 3 and are driven to rotate synchronously via a synchronous belt transmission mechanism.

[0021] like Figures 2-3 As shown, the synchronous belt conveyor mechanism includes a first synchronous single pulley 4.3 coaxially mounted with the first lead screw 4.1, a synchronous double pulley 4.4 (with two synchronous single pulleys) coaxially mounted with the second lead screw 4.2, a servo motor 4.5 mounted on the top seat 3, a second synchronous single pulley 4.6 mounted on the output end of the servo motor 4.5, a first synchronous belt 4.7 wound on the first synchronous single pulley 4.3 and the synchronous double pulley 4.4, and a second synchronous belt 4.8 wound on the synchronous double pulley 4.4 and the second synchronous single pulley 4.6.

[0022] like Figures 2-3 As shown, when the servo motor 4.5 starts, it drives the second synchronous single wheel 4.6 to rotate. The second synchronous single wheel 4.6 drives the synchronous double wheel 4.4 to rotate via the second synchronous belt 4.8. The synchronous double wheel 4.4 drives the first synchronous single wheel 4.3 to rotate via the first synchronous belt 4.7. The first synchronous single wheel 4.3 and the synchronous double wheel 4.4 rotate in the same direction and at the same speed, i.e., they move synchronously. In this way, the first lead screw 4.1 and the second lead screw 4.2 move synchronously, which can drive the movable plate 5 to move up and down horizontally.

[0023] like Figure 2 As shown, the bottom ends of both the first lead screw 4.1 and the second lead screw 4.2 are detachably mounted with limit plates 4.9 via screws. The limit plates 4.9 prevent the movable plate 5 from detaching from the first lead screw 4.1 and the second lead screw 4.2.

[0024] like Figure 1 As shown, a brush ring 11 is detachably installed at the through hole 7 on the base plate 1 via bolts, with the inner side of the brush ring 11 contacting the outer wall of the insertion rod 6. Thus, after the measurement is completed and the insertion rod 6 is reset upwards, the bristles or cleaning cloth layer on the inner side of the brush ring 11 can further clean the side wall of the insertion rod 6. After a period of use, the brush ring 11 can also be replaced.

[0025] like Figure 2 As shown, a rubber plate 12 is fixed at the lower end of the top seat 3, directly opposite the indicator slider 9. After the indicator slider 9 returns to its original position, it rests against the rubber plate 12, which provides some protection for the indicator slider 9 and also prevents noise.

[0026] Additionally, a control box is installed above the top mount 3. The control box contains a controller, power supply (battery), etc., and has operation buttons on the outside. The controller is electrically connected to the servo motor 4.5 and pressure sensor, and controls the start and stop of the servo motor 4.5. The power supply provides power to the servo motor 4.5 and pressure sensor.

[0027] In addition, to make the measurement more accurate, a pressure sensor can be installed at the bottom of the insertion rod 6 in this application. After the insertion rod 6 reaches the bottom of the asphalt pavement, the pressure sensor sends a signal, which drives the servo motor 4.5 to stop via the controller, thus completing the detection. The installation position and structure of the pressure sensor can adopt the pressure sensor in the patent "A Device for Detecting the Thickness of Asphalt Mixture Paving for Asphalt Pavement Construction" with application number "202410627571.1".

Claims

1. A simple device for measuring the thickness of asphalt paving, characterized by: Includes a base plate (1), which is fixedly connected to a top seat (3) via a vertical rod (2); a screw drive mechanism (4) is installed on the top seat (3), which drives the movable plate (5) to move up and down; at least one insert rod (6) is fixed at the lower end of the movable plate (5), and the insert rod (6) is directly opposite the through hole (7) on the base plate (1); a scale (8) is vertically installed at the lower end of the top seat (3), and an indicator slider (9) is slidably installed on the scale (8), and the other end of the indicator slider (9) is fixedly connected to the movable plate (5) via a connecting rod (10).

2. The simple asphalt paving thickness measuring device according to claim 1, characterized in that: The lead screw drive mechanism (4) includes a first lead screw (4.1) and a second lead screw (4.2). Both the first lead screw (4.1) and the second lead screw (4.2) are threadedly connected to the movable plate (5). The upper ends of the first lead screw (4.1) and the second lead screw (4.2) are rotatably connected to the top seat (3) through bearings. The top ends of the first lead screw (4.1) and the second lead screw (4.2) extend out of the top seat (3) and are driven to rotate synchronously through a synchronous belt transmission mechanism.

3. A simple device for measuring the thickness of asphalt paving according to claim 2, characterized in that: The synchronous belt conveyor mechanism includes a first synchronous single wheel (4.3) coaxially mounted with the first lead screw (4.1), a synchronous double wheel (4.4) coaxially mounted with the second lead screw (4.2), a servo motor (4.5) mounted on the top seat (3), a second synchronous single wheel (4.6) mounted on the output end of the servo motor (4.5), a first synchronous belt (4.7) wound on the first synchronous single wheel (4.3) and the synchronous double wheel (4.4), and a second synchronous belt (4.8) wound on the synchronous double wheel (4.4) and the second synchronous single wheel (4.6).

4. The asphalt paving thickness simple measuring device according to claim 3, characterized in that: The first lead screw (4.1) and the second lead screw (4.2) are symmetrically distributed on the movable plate (5) and arranged vertically.

5. The asphalt paving thickness simple measuring device of claim 4, wherein: The bottom ends of the first lead screw (4.1) and the second lead screw (4.2) are both provided with limiting plates (4.9).

6. The asphalt paving thickness simple measuring device of claim 1, wherein: A brush ring (11) is detachably installed at the through hole (7) on the base plate (1), and the inner side of the brush ring (11) contacts the outer wall of the insertion rod (6).

7. The asphalt paving thickness simple measuring device of claim 1, wherein: A rubber plate (12) is fixed at the lower end of the top seat (3) opposite the indicator slider (9).

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