A highway pavement quality sampler

Abstract

The utility model belongs to the technical field of highway engineering sampling equipment, and we propose a kind of highway pavement quality sampler, including vehicle body and sampling device;Vehicle body includes chassis, control cabinet and battery box, rectangular hole is opened in chassis, and sampling device is rotatably installed on rectangular hole;Sampling device includes fuselage, motor box and handle, and the one end of fuselage close to chassis is provided with hinge shaft, and hinge shaft is rotatably arranged on chassis;The top of fuselage is provided with handle, and control button is arranged on handle;The bottom one end of fuselage is installed with sampling drill bit, and the position close to sampling drill bit of fuselage is installed with motor box, and driving motor is installed in motor box, and driving motor drives sampling drill bit to work downward;The highway pavement quality sampling device of the application carries out systematic optimization to the defects of prior art, and through the collaborative design of vehicle body structure, sampling device and drill bit, the "lightweight, high efficiency, precision" of sampling operation is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of highway engineering sampling equipment, specifically a highway pavement quality sampler. Background Technology

[0002] As a core infrastructure of the transportation system, the quality of highway pavement directly determines traffic safety, comfort, and service life. During highway construction acceptance, routine maintenance, and defect diagnosis, pavement sampling and testing are crucial methods for assessing key indicators such as pavement structural strength, material uniformity, and interlayer bonding performance. For example, drilling cylindrical core samples can detect key parameters such as the Marshall stability of asphalt pavement and the compressive strength of concrete pavement. Therefore, the performance of the sampling device directly affects the accuracy of the test data and the efficiency of the operation.

[0003] Manual handheld sampling equipment: This type of equipment typically requires operators to carry or shoulder a small drilling rig. After arriving at the sampling point, the operator manually fixes the rig and starts the operation. Its core drawbacks are: First, the workload is high, as the entire weight of the drilling rig must be supported manually. Prolonged operation can easily lead to operator fatigue, causing the rig to tilt and resulting in deviations in the verticality of the core sample, affecting the accuracy of subsequent testing data. Second, the sampling efficiency is low. Manually positioning the drilling rig and adjusting its verticality requires repeated calibration, and sampling at a single point typically takes more than 15 minutes, making it impossible to continuously complete sampling at multiple points. Third, the sample integrity is poor. During manual operation, the drilling rig is easily affected by hand tremors, leading to unstable contact between the drill barrel and the road surface. During cutting, the core sample is prone to breakage and chipping due to uneven stress, especially for high-strength cement concrete pavements, where the core sample qualification rate is less than 70%.

[0004] Large vehicle-mounted sampling equipment: This type of equipment uses heavy trucks or engineering vehicles as carriers and integrates large drilling systems. Although it can solve the problem of the intensity of manual operation, it has obvious limitations: First, it has poor flexibility. The overall size of the equipment is large (the length usually exceeds 6m) and heavy (more than 10 tons), making it impossible to enter narrow scenarios such as municipal branch roads and internal roads of residential areas. It also has high requirements for road surface bearing capacity and can easily cause secondary damage to the road surface on newly built but not yet open to traffic roads or weak sections of roads under maintenance. Second, it is complicated to operate. It requires professional drivers and sampling operators to work together. Before starting the equipment, the support legs need to be deployed and the level needs to be calibrated. The preparation time for a single point exceeds 30 minutes, which is not suitable for high-density multi-point sampling (such as the scenario in highway reconstruction and expansion projects where one sampling point is needed every 200m-500m). Third, it is expensive. The equipment purchase cost and maintenance cost are high, and it requires a special transport vehicle, making it difficult to popularize in small and medium-sized maintenance units or grassroots testing institutions.

[0005] Based on the practical shortcomings of existing technologies, we propose a highway pavement quality sampler. Utility Model Content

[0006] The purpose of this invention is to provide a highway pavement quality sampler to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a highway pavement quality sampler, comprising a vehicle body and a sampling device; The vehicle body includes a chassis, a control console, and a battery box. A rectangular hole is provided on the chassis, and a sampling device is rotatably mounted on the rectangular hole. The sampling device includes a body, a motor box, and a handle. A hinge shaft is located at one end of the body near the chassis, and the hinge shaft is rotatably mounted on the chassis. A handle is located at the top of the body, and control buttons are installed on the handle. A sampling drill bit is installed at one end of the bottom of the machine body. A motor box is installed near the sampling drill bit on the machine body. A drive motor is installed inside the motor box, and the drive motor drives the sampling drill bit downward to perform the operation.

[0008] Preferably, the chassis has four wheels at the bottom, the control console is located at one end of the chassis, and a steering wheel is mounted on the control console; A battery box is installed on the right side of the chassis, which contains lithium batteries to power the device; a storage box is set on top of the battery box, which is used to store road surface samples.

[0009] Preferably, a hook is rotatably installed on the control console near the sampling device, and a hanging rod is installed on the sampling device. The sampling device is then hung on the hanging rod by raising the hook.

[0010] Preferably, the sampling drill bit includes a connector and a drill barrel. The connector is located at the top of the drill barrel and is connected to the drive motor for transmission upward. The drill barrel extends downward, and when the sampling device moves downward, it passes through the rectangular hole and abuts against the road surface. Then, under the rotation of the drive motor, it cuts a road surface sample.

[0011] Preferably, the drill barrel has a hollow sampling cavity, and grinding teeth are axially distributed on the bottom edge of the drill barrel. When the grinding teeth rotate, they cut cylindrical samples. The drill barrel has multiple layers of side cutting teeth on its sidewalls. Each layer of side cutting teeth has outwardly protruding teeth distributed axially, which increases the side cutting force during sampling and cutting.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The highway pavement quality sampling device of the present invention systematically optimizes the shortcomings of the prior art. Through the coordinated design of the vehicle structure, sampling device and drill bit, it achieves "lightweight, efficient and precise" sampling operation. The compact vehicle design reduces reliance on manual labor: The device uses a small vehicle powered by a lithium battery as its carrier. Operators only need to stand on the chassis platform and control the vehicle to move slowly using the steering wheel and joystick, eliminating the need for manual equipment handling. Compared to manually holding the equipment, this reduces physical exertion and avoids operational errors caused by fatigue. At the same time, the compact size of the vehicle allows it to flexibly enter narrow scenarios such as municipal side roads and residential roads, and it has low requirements for road surface load-bearing capacity, making it suitable for various scenarios such as newly built roads and maintenance sections, thus solving the problem of poor flexibility of large vehicle-mounted equipment.

[0013] Rapid cutting and slag removal shorten sampling time: The tungsten carbide grinding teeth at the bottom of the drill barrel can cut the bond between the road surface material and aggregate at high speed, making it more efficient in cutting into the road surface compared to ordinary drill bits; at the same time, the multi-layer side cutting teeth on the side wall of the drill barrel rotate synchronously with the drill barrel, which can cut the connection between the core sample and the surrounding road surface in real time, avoiding adhesion and pulling, and the airflow generated by the rotation can quickly discharge the cutting debris, preventing the accumulation of debris from increasing the cutting resistance.

[0014] Multi-dimensional cutting design avoids sample damage: Through the collaborative cutting structure of "bottom grinding teeth + side cutting teeth", the bottom grinding teeth are responsible for vertically cutting into the road surface and forming the initial outline of the core sample, while the side cutting teeth cut off the part of the core sample adhering to the surrounding road surface in real time, preventing the core sample from cracking, missing corners or peeling off due to pulling; the core sample integrity qualification rate is high, which solves the problem of high sample damage rate of existing equipment, and provides accurate physical samples for subsequent tests (such as compressive strength, Marshall stability). Attached Figure Description

[0015] Figure 1 This is the front view of the present utility model; Figure 2 This is a schematic diagram showing the installation position of the hook in this utility model; Figure 3 This is a schematic diagram of the sampling device of this utility model; Figure 4 This is a schematic diagram of the sampling drill bit of this utility model.

[0016] In the picture: 1 chassis, 2 control console, 3 steering wheel, 4 battery box, 5 storage box, 6 wheels, 7 hooks; 8. Sampling device; 8-1. Body; 8-2. Motor box; 8-3. Handle; 8-4. Hinge shaft; 9. Sampling drill bit, 9-1. Connector, 9-2. Drill barrel, 9-3. Side cutting teeth, 9-4. Grinding teeth, 9-5. Sampling chamber. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Example: Please see Figure 1-4 The present invention provides the following technical solution: A road surface quality sampler includes a vehicle body and a sampling device 8. The vehicle body includes a chassis 1, a control console 2 and a battery box 4. Four wheels 6 are provided at the bottom of the chassis 1. The control console 2 is located at one end of the chassis 1 and a steering wheel 3 is installed on the control console 2. The steering wheel 3 is used to control the movement and steering of the wheels 6. The control method and control system of the vehicle body are existing technologies and will not be described in detail here. A battery box 4 is installed on the right side of the chassis 1. The battery box 4 contains lithium batteries to power the device. A storage box 5 is installed on the top of the battery box 4. The storage box 5 is used to place road surface samples. A rectangular hole is provided on the chassis 1, and a sampling device 8 is rotatably mounted on the rectangular hole. The sampling device 8 includes a body 8-1, a motor box 8-2, and a handle 8-3. A hinge shaft 8-4 is provided at one end of the body 8-1 near the chassis 1. The hinge shaft 8-4 is rotatably mounted on the chassis 1, so that the sampling device 8 can rotate up and down. A handle 8-3 is provided at the top of the body 8-1. A control button is provided on the handle 8-3. The handle 8-3 is used to manually move the sampling device 8 and manually control the operation of the sampling device 8. A sampling drill bit 9 is installed at one end of the bottom of the machine body 8-1. A motor box 8-2 is installed near the sampling drill bit 9 on the machine body 8-1. A drive motor is installed inside the motor box 8-2, and the drive motor drives the sampling drill bit 9 downward to perform the operation. A hook 7 is rotatably installed on the control console 2 near the sampling device 8. A hanging rod is installed on the sampling device 8. The hook 7 can be hung on the hanging rod when the sampling device 8 is facing upwards. The sampling device 8 can be hung up and placed when not in use. The sampling drill bit 9 includes a connector 9-1 and a drill barrel 9-2. The connector 9-1 is located at the top of the drill barrel 9-2 and is connected to the drive motor for transmission upwards. The drill barrel 9-2 extends downwards. When the sampling device 8 moves downwards, it passes through the rectangular hole and abuts against the road surface. Then, under the rotation of the drive motor, it cuts a road surface sample. The inner cavity of the drill barrel 9-2 is provided with a hollow sampling chamber 9-5. The bottom edge of the drill barrel 9-2 is axially distributed with grinding teeth 9-4. When the grinding teeth 9-4 rotate, they cut cylindrical samples. The sidewall of the drill barrel 9-2 is provided with multiple layers of side cutting teeth 9-3. Each layer of side cutting teeth 9-3 has outwardly protruding teeth distributed axially, which increases the side cutting force during sampling and cutting, and improves the integrity of the sample.

[0020] Working principle: The control console 2 is equipped with a joystick to control the forward, backward and stop movement of the vehicle. A platform is reserved on the top surface of the chassis 1, and the operator stands on the chassis 1 to operate the vehicle. The vehicle's speed is limited and it moves slowly. After reaching the sampling point, the vehicle stops and the rectangular hole is placed in a relatively flat area of ​​the road for sampling. The sampling device 8 is rotatably connected to the chassis 1 via the hinge shaft 8-4. The operator holds the handle 8-3 and pushes the body 8-1, which can rotate up and down within the range of 0-90° around the hinge shaft. When sampling, it needs to be adjusted to be perpendicular to the road surface at 90°. The drive motor is connected to the connector 9-1 of the sampling drill bit 9 via a flexible coupling, which allows the flexible coupling to compensate for minor coaxiality deviations between the motor shaft and the drill bit shaft, reduce vibration transmission, and prevent shaft damage. The grinding teeth 9-4 at the bottom of the drill barrel 9-2 are made of tungsten steel. When the drill barrel 9-2 is driven to rotate, the cutting edge of the grinding teeth 9-4 contacts the road surface and cuts the road surface material by rotating. The high-speed rotating grinding teeth 9-4 can quickly cut the bond between the road surface material and the aggregate or the aggregate in the concrete. The multi-layer side cutting teeth 9-3 on the side wall of the drill barrel rotate synchronously with the drill barrel and can cut the connection between the sample and the surrounding road surface in real time to prevent the sample from being pulled and deformed due to the adhesion of the road surface material. At the same time, the airflow generated by the rotation of the side cutting teeth 9-3 can discharge the cutting debris and avoid the accumulation of debris affecting the cutting efficiency.

[0021] The sampling chamber 9-5 inside the drill barrel is a hollow structure with a polished inner wall to reduce friction between the sample and the chamber wall. When the drill barrel cuts into the road surface, the cylindrical sample after cutting will rise with the drill barrel and enter the sampling chamber. The vent holes in the chamber wall can expel the air inside the chamber, avoiding pressure differences that could prevent the sample from entering smoothly or cause deformation. After sampling, the sample remains in the sampling chamber 9-5 under the action of gravity until it is removed by a special tool. Meanwhile, the vehicle is also equipped with a water tank and water supply pipe (not shown in the figure, but it is existing technology and can be easily applied by those skilled in the art), which can continuously spray water to the drilling site to cool it down during drilling.

[0022] It should be noted that all standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. It should be noted that the electrical components mentioned in this utility model have been sorted according to the actual situation during manufacturing, so that the wire harness will not cause the wire harness to become tangled or affect the operation. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0023] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highway pavement quality sampler comprising a vehicle body and a sampling device (8), characterised in that: The vehicle body includes a chassis (1), a control console (2) and a battery box (4). A rectangular hole is provided on the chassis (1), and a sampling device (8) is rotatably installed on the rectangular hole. The sampling device (8) includes a body (8-1), a motor box (8-2), and a handle (8-3). A hinge shaft (8-4) is provided at one end of the body (8-1) near the chassis (1), and the hinge shaft (8-4) is rotatably mounted on the chassis (1). A handle (8-3) is provided at the top of the body (8-1), and a control button is provided on the handle (8-3). A sampling drill bit (9) is installed at one end of the bottom of the machine body (8-1). A motor box (8-2) is installed on the machine body (8-1) near the sampling drill bit (9). A drive motor is installed in the motor box (8-2), and the drive motor drives the sampling drill bit (9) downward to perform the operation.

2. A highway pavement quality sampler according to claim 1, characterised in that: The chassis (1) has four wheels (6) at the bottom, the control console (2) is located at one end of the chassis (1), and a steering wheel (3) is installed on the control console (2). A battery box (4) is installed on the right side of the chassis (1), and a lithium battery is placed inside the battery box (4) to power the device; a storage box (5) is set on the top of the battery box (4), and the storage box (5) is used to place road surface samples.

3. A highway pavement quality sampler according to claim 1, wherein: The control console (2) is rotatably mounted with a hook (7) near the sampling device (8). The sampling device (8) is mounted with a hanging rod. The sampling device (8) hangs the hook (7) on the hanging rod upwards.

4. A highway pavement quality sampler according to claim 1, characterized in that: The sampling drill bit (9) includes a connector (9-1) and a drill barrel (9-2). The connector (9-1) is located at the top of the drill barrel (9-2) and is connected to the drive motor for transmission upwards. The drill barrel (9-2) extends downwards, and the sampling device (8) passes through the rectangular hole and abuts against the road surface when it moves downwards. Then, it cuts the road surface sample under the rotation of the drive motor.

5. A highway pavement quality sampler according to claim 4, wherein: The inner cavity of the drill barrel (9-2) is provided with a hollow sampling chamber (9-5). The bottom edge of the drill barrel (9-2) is axially distributed with grinding teeth (9-4). When the grinding teeth (9-4) rotate, they cut cylindrical samples. The drill barrel (9-2) has multiple layers of side cutting teeth (9-3) on its side wall. Each layer of side cutting teeth (9-3) has outwardly protruding teeth distributed axially, which increases the side cutting force during sampling and cutting.

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