A municipal highway roadbed compactness rapid detection device

Abstract

The utility model discloses a kind of municipal highway roadbed compactness rapid detection device, including walking chassis, the walking chassis top is equipped with support frame, vertical setting is provided with screw rod and guide rod by first driving motor on the support frame;A horizontally arranged lifting plate is threadedly connected on the screw rod, the lifting plate is slidably connected with the guide rod;Rotatably connected with outer cylinder at the lifting plate bottom, the lifting plate top end is equipped with second driving motor for driving the rotation of the outer cylinder;Openable and closable sampling cylinder assembly is equipped in the outer cylinder. In conclusion, the utility model overcomes the deficiencies of prior art, and the design is reasonable. Through automatic rotation sampling and opening and closing unloading sample, efficient and rapid roadbed sampling and sample complete and easy to take are realized. The accuracy and work efficiency of compactness detection are significantly improved. It has high social use value and application prospect.

Description

Technical Field

[0001] This utility model relates to the field of roadbed compaction testing technology, and in particular to a rapid testing device for the compaction of municipal highway roadbeds. Background Technology

[0002] Subgrade compaction is a key indicator for measuring the quality of subgrade construction in municipal and highway engineering projects, directly affecting the smoothness, service life, and driving safety of the road surface. Therefore, rapid and accurate testing of subgrade compaction is crucial during construction.

[0003] Currently, common methods for on-site testing of roadbed compaction include the sand cone method, the ring sampler method, and the nuclear density analyzer method. Among these, the sand cone method, as a traditional and classic method, yields relatively accurate results, but it suffers from drawbacks such as cumbersome operation, long processing time, high labor requirements, and significant road surface damage, making it difficult to meet the demands of modern construction for rapid and efficient testing. The ring sampler method is mainly suitable for cohesive soils; sampling is difficult in sandy soils or soil layers containing gravel, and the sampling depth is limited, resulting in similarly low efficiency. While the nuclear density analyzer method is rapid, the equipment is expensive, there are radiation safety concerns, and its test results are easily affected by the material composition and homogeneity. Furthermore, it usually requires calibration, limiting its widespread application.

[0004] Regarding sampling devices, most existing soil samplers use fixed, thin-walled sampling cylinders, which are pressed into the roadbed using static pressure or hammering. During the pressing process, the soil and the inner wall of the sampling cylinder generate significant friction and adhesion, making it difficult to remove the sample completely and smoothly after sampling. Operators often need to repeatedly tap the sample with tools, which not only easily damages the sample structure, causing it to become loose and deformed, thus losing its representativeness, but also greatly reduces testing efficiency.

[0005] Therefore, there is a lack of existing technologies for a device that can achieve rapid, non-destructive sampling and easily obtain complete samples, thereby efficiently and accurately detecting the compaction degree of roadbed. Utility Model Content

[0006] To address the problems mentioned in the background section, this invention provides a rapid detection device for the compaction degree of municipal highway subgrade.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A rapid testing device for the compaction degree of municipal highway subgrade includes a chassis with a support frame on top. A threaded rod and a guide rod, driven by a first drive motor, are vertically mounted on the support frame. A horizontally mounted lifting plate is threaded onto the threaded rod, and the lifting plate is slidably connected to the guide rod. An outer cylinder is rotatably connected to the bottom of the lifting plate, and a second drive motor for driving the outer cylinder to rotate is located at the top of the lifting plate. An openable sampling cylinder assembly is located inside the outer cylinder, comprising two symmetrically arranged cylinder segments. A drive mechanism for driving the two cylinder segments to move towards or away from each other is located inside the outer cylinder.

[0009] Preferably, the lower part of the walking chassis is equipped with four moving wheels at the four corners, and the walking chassis is equipped with hydraulic outriggers.

[0010] Preferably, the first drive motor is fixedly installed on the top of the support frame, and its output end is connected to one end of the threaded rod.

[0011] Preferably, the output end of the second drive motor is fixedly connected to the top end of the outer cylinder.

[0012] Preferably, the bottom of the cylindrical flap is provided with a cutting edge.

[0013] Preferably, the driving mechanism includes a second threaded rod rotatably connected to the side wall of the outer cylinder, the threads at both ends of the second threaded rod having opposite directions; each cylinder segment has a moving block at its top end, the moving block being threadedly connected to the second threaded rod.

[0014] Preferably, a limiting groove is formed at the top of the inner wall of the outer cylinder, and a limiting block is provided at the top of the movable block. The limiting block is embedded in the limiting groove and can slide along it.

[0015] Preferably, the end of the second threaded rod is provided with a rotating handle.

[0016] Preferably, the lifting plate is rotatably connected to the outer cylinder via a bearing.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. High sampling quality and good sample integrity: The sampling cylinder assembly rotates and cuts into the roadbed under the drive of the second drive motor. This rotary cutting method effectively reduces disturbance to the surrounding soil and prevents the sample from being compressed or cracked during the compaction process. The obtained sample has a regular shape and dense structure, which can more realistically reflect the actual compaction condition of the roadbed, thus providing a high-precision sample for subsequent density calculation and ensuring the accuracy of the test data.

[0019] 2. Easy and complete sample removal: The innovative openable and closable sampling cylinder assembly design is one of the core advantages of this device. After sampling, the two cylinder segments can be separated by rotating the reverse threaded rod, thus naturally releasing the clamping force on the sample. This allows the sample to be easily and completely pushed out or removed, completely solving the problems of sample difficulty, easy breakage, and easy adhesion in traditional one-piece soil sampling cylinders, further ensuring the representativeness of the sample.

[0020] 3. High testing efficiency and convenient operation: The device integrates a walking chassis and wheels, allowing for quick movement to the testing point. Automatic lifting and rotating sampling is achieved through motor drive, replacing traditional manual hammering or pressing sampling methods. This significantly shortens the sampling time for a single sample, reduces the workload of operators, and enables rapid and efficient on-site testing.

[0021] 4. Good overall stability and reliable test results: The device is equipped with hydraulic outriggers, which can be stably supported on the ground before sampling. This effectively avoids problems such as inconsistent sampling depth and tilting of the sampling tube caused by equipment shaking or sinking during the sampling process, improves the standardization and consistency of sampling, and ensures the comparability and reliability of data between different measuring points.

[0022] In summary, this utility model overcomes the shortcomings of the prior art, has a reasonable design, and achieves efficient and rapid roadbed sampling and easy and complete sample collection through automated rotary sampling and opening and closing sampling. It significantly improves the accuracy and efficiency of compaction testing and has high social use value and application prospects. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the outer cylinder structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the openable and closable sampling cylinder assembly of this utility model.

[0027] In the diagram: 1. Walking chassis, 11. Moving wheels, 12. Hydraulic outriggers, 2. Support frame, 3. Threaded rod, 31. First drive motor, 32. Guide rod, 4. Lifting plate, 401. Second drive motor, 41. Outer cylinder, 41. Limiting groove, 411. Threaded rod, 42. Rotating handle, 421. Openable and closable sampling cylinder assembly, 5. Cylinder flap, 51. Moving block, 52. Limiting block, 53. Cutting edge, 511. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Example 1

[0030] Reference Figure 1-3 A rapid testing device for the compaction degree of municipal roadbed includes a chassis 1 with four wheels 11 at the four corners for easy on-site movement. The chassis 1 is equipped with hydraulic outriggers 12, which extend during operation to stabilize the entire device.

[0031] The top of the chassis 1 is equipped with a support frame 2. A threaded rod 3 is rotatably connected to the support frame 2 in the vertical direction. A guide rod 32 is vertically arranged on the support frame 2. A first drive motor 31 is provided on the top of the support frame 2. The output end of the first drive motor 31 is threadedly connected to the threaded rod 3. A horizontally arranged lifting plate 4 is movably connected to the support frame 2. The lifting plate 4 is threadedly connected to the threaded rod 3 and slidably connected to the guide rod 32. Starting the first drive motor 31 can drive the threaded rod 3 to rotate, thereby driving the lifting plate 4 to rise and fall.

[0032] The bottom of the lifting plate 4 is rotatably connected to an outer cylinder 41. The outer cylinder 41 is equipped with an openable and closable sampling cylinder assembly 5. A limiting groove 411 is opened at the top of the inner wall of the outer cylinder 41. A second threaded rod 42 is rotatably connected to the side wall of the outer cylinder 41. The threads at both ends of the second threaded rod 42 are opposite. The openable and closable sampling cylinder assembly 5 includes two symmetrically arranged cylinder segments 51. The bottom of the cylinder segment 51 is provided with a cutting edge 511. The top of the cylinder segment 51 is provided with a moving block 52. The moving block 52 is threadedly connected to the second threaded rod 42. The top of the moving block 52 is provided with a limiting block 53. The limiting block 53 slides along the limiting groove 411. After sampling is completed, rotating the rotating handle 421 at the end of the second threaded rod 42 can drive the two cylinder segments 51 to be separated in the center. At this time, the sample inside the cylinder segment 51 can be easily and completely removed.

[0033] The top of the lifting plate 4 is equipped with a second drive motor 401. The output end of the second drive motor 401 is fixedly connected to the top of the outer cylinder 41. When the openable sampling cylinder assembly 5 enters the roadbed, it generates a rotational motion to facilitate sampling.

[0034] Working principle: When roadbed compaction testing is required, the device is first moved to the designated testing position via the moving wheels 11 on the underside of the chassis 1. After reaching the position, the hydraulic outriggers 12 extend and support the device on the ground to stabilize the entire device and prevent movement or tilting during sampling.

[0035] Next, the first drive motor 31 at the top of the support frame 2 is started, and the first drive motor 31 drives the threaded rod 3 to rotate. Since the lifting plate 4 is threadedly connected to the threaded rod 3 and slidably connected to the guide rod 32, the rotation of the threaded rod 3 drives the lifting plate 4 to move downward along the guide rod 32. When the lifting plate 4 descends, it drives the outer cylinder 41 at its bottom and the internal openable sampling cylinder assembly 5 to move downward, so that the cutting edge 511 at the bottom of the cylinder petal 51 of the openable sampling cylinder assembly 5 contacts the roadbed surface.

[0036] Simultaneously, the second drive motor 401 at the top of the lifting plate 4 is activated. The output end of the second drive motor 401 is fixedly connected to the top of the outer cylinder 41, thereby driving the outer cylinder 41 to rotate. The rotation of the outer cylinder 41 drives the entire openable sampling cylinder assembly 5 to rotate. During the rotation, the cutting edge 511 at the bottom of the cylinder petal 51 cuts into the roadbed, forming a rotational cutting action, and successfully collecting roadbed samples. Rotational sampling reduces sampling resistance, improves sampling efficiency, and ensures sample integrity.

[0037] After sampling is completed, the first drive motor 31 reverses, driving the threaded rod 3 to rotate in the opposite direction, thereby driving the lifting plate 4 to rise and remove the openable sampling cylinder assembly 5 from the roadbed. At this time, the openable sampling cylinder assembly 5 contains the roadbed sample.

[0038] To retrieve the sample, the operator rotates the handle 421 at the end of the second threaded rod 42 on the side wall of the outer cylinder 41. Since the threads at both ends of the second threaded rod 42 rotate in opposite directions, rotation causes the two moving blocks 52 to move in opposite directions (i.e., to separate). The moving blocks 52 are connected to the top of the cylinder segments 51, and the limiting block 53 at the top of the moving blocks 52 slides along the limiting groove 411 on the inner wall of the outer cylinder 41, ensuring smooth movement. The two cylinder segments 51 then separate, opening the sampling cylinder assembly and exposing the internal sample. The sample, loosened by the separation of the cylinder segments, can be easily and completely removed for subsequent compaction testing.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are 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.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rapid testing device for the compaction degree of municipal highway subgrade, characterized in that, include A walking chassis (1) is provided with a support frame (2) on the top of the walking chassis (1). A threaded rod (3) driven by a first drive motor (31) and a guide rod (32) are vertically arranged on the support frame (2). A horizontally arranged lifting plate (4) is threadedly connected to the threaded rod (3). The lifting plate (4) is slidably connected to the guide rod (32). An outer cylinder (41) is rotatably connected to the bottom of the lifting plate (4). A second drive motor (401) for driving the outer cylinder (41) to rotate is provided at the top of the lifting plate (4). An openable and closable sampling cylinder assembly (5) is provided inside the outer cylinder (41). The openable and closable sampling cylinder assembly (5) includes two symmetrically arranged cylinder petals (51). A drive mechanism for driving the two cylinder petals (51) to move towards or away from each other is provided inside the outer cylinder (41).

2. The rapid testing device for the compaction degree of municipal highway subgrade according to claim 1, characterized in that: The lower part of the walking chassis (1) is equipped with four moving wheels (11) at the four corners, and the walking chassis (1) is equipped with hydraulic outriggers (12).

3. The rapid testing device for the compaction degree of municipal highway subgrade according to claim 1, characterized in that: The first drive motor (31) is fixedly installed on the top of the support frame (2), and its output end is connected to one end of the threaded rod (3).

4. The rapid testing device for the compaction degree of municipal highway subgrade according to claim 3, characterized in that: The output end of the second drive motor (401) is fixedly connected to the top end of the outer cylinder (41).

5. A rapid testing device for the compaction degree of municipal highway subgrade according to claim 1, characterized in that... The bottom of the cylindrical flap (51) is provided with a cutting edge (511).

6. The rapid testing device for the compaction degree of municipal highway subgrade according to claim 5, characterized in that: The driving mechanism includes a second threaded rod (42) rotatably connected to the side wall of the outer cylinder (41), with the threads at both ends of the second threaded rod (42) having opposite directions; each cylinder segment (51) has a moving block (52) at its top end, and the moving block (52) is threadedly connected to the second threaded rod (42).

7. A rapid testing device for the compaction degree of municipal highway subgrade according to claim 6, characterized in that: The inner wall of the outer cylinder (41) has a limiting groove (411) at the top, and the top of the moving block (52) has a limiting block (53). The limiting block (53) is embedded in the limiting groove (411) and can slide along it.

8. The rapid testing device for the compaction degree of municipal highway subgrade according to claim 7, characterized in that: The end of the second threaded rod (42) is provided with a rotating handle (421).

9. The rapid testing device for the compaction degree of municipal highway subgrade according to claim 1, characterized in that: The lifting plate (4) is rotatably connected to the outer cylinder (41) via a bearing.

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