Single-acting type threaded multi-specification soil sampler

Abstract

The utility model relates to test sampling engineering soil sampling technical field, the utility model provides a single -action type thread multi -specification soil sampler, including support, the support threaded connection has the connecting rod of vertical activity, is equipped with the rotary hand wheel on the connecting rod upper end, the coaxial connection of connecting rod lower extreme has the bearing, the outer movable cover of bearing is equipped with the connecting disc, the outer periphery threaded connection of connecting disc has the inner ring cutter, the outer thread connection of inner ring cutter has the middle ring cutter, the outer thread connection of middle ring cutter has the outer ring cutter, through setting up the bearing with the connecting disc cooperation in the connecting rod lower extreme, the torsional force of rotary hand wheel is converted into the linear force of vertical direction, avoid the ring cutter follow -up rotation, reduce the soil disturbance, ensure the integrity of the undisturbed soil sample, the inner ring cutter, the middle ring cutter, the outer ring cutter are gradually nested through the inner and outer thread, form the step -by -step locking structure, realize three diameter specifications's fast switching, improved the versatility of equipment.

Description

Technical Field

[0001] This utility model relates to the field of test sampling and engineering soil sampling technology, specifically, to a single-acting threaded multi-specification soil sampler. Background Technology

[0002] In fields such as engineering geological exploration, environmental monitoring, and agricultural soil research, accurately obtaining undisturbed undisturbed soil samples is crucial for ensuring the reliability of experimental data. Traditional soil samplers require frequent changes of different sizes of cutter rings to adapt to diverse sampling needs during field operations. However, existing devices have significant limitations in terms of operational efficiency, force application methods, and cutter ring removal.

[0003] Existing soil samplers typically use a single-size ring cutter or replace the ring cutter through simple insertion, removal, or snap-fit ​​methods. The replacement process is cumbersome and can easily lead to loosening of the ring cutter, making it difficult to meet the requirements of efficient operation. In addition, in terms of the force application method, traditional soil samplers mostly rely on manual hammering or pressing, and the direction of force application is difficult to control. Horizontal shaking or tilting can easily cause soil disturbance and affect the original structure of the soil sample. Utility Model Content

[0004] The purpose of this invention is to provide a single-acting threaded multi-specification soil sampler, which solves the problems of inconvenient replacement of the ring cutter and easy disturbance of the soil sample during the force application process in existing soil samplers.

[0005] This utility model is achieved through the following technical solution: a single-acting threaded multi-specification soil sampler, including a bracket, the bracket being threadedly connected to a vertically movable connecting rod, the upper end of the connecting rod being provided with a rotating handwheel, the lower end of the connecting rod being coaxially connected to a bearing, a connecting disc being movably sleeved outside the bearing, an inner ring cutter being threadedly connected to the outer circumference of the connecting disc, a middle ring cutter being threadedly connected to the outer circumference of the inner ring cutter, and an outer ring cutter being threadedly connected to the outer circumference of the middle ring cutter.

[0006] Furthermore, the connecting plate is formed by hinged assembly of a first locking block and a second locking block, and both the first and second locking blocks have slots for engaging the bearing.

[0007] Furthermore, the slot is a stepped semi-circular slot, and the projection of the slot onto the splice seam plane is an inverted T shape.

[0008] Furthermore, a force-applying protrusion is provided at the top of the connecting rod, and a force-applying groove that mates with the force-applying protrusion is provided at the center of the rotating handwheel.

[0009] Furthermore, the force-applying protrusion is cross-shaped, and the force-applying groove is a cross-shaped groove.

[0010] Furthermore, the lower part of the outer periphery of the connecting disc is provided with an external thread that mates with the inner ring cutter.

[0011] Furthermore, the rotating handwheel is covered with an anti-slip layer.

[0012] Furthermore, the support is a tripod, and the bottom of the support is equipped with an anti-slip pad.

[0013] This utility model has at least the following advantages and beneficial effects: by setting a bearing at the lower end of the connecting rod to cooperate with the connecting plate, the torque of the rotating handwheel is converted into a linear force in the vertical direction, avoiding the ring cutter from rotating with it, reducing soil disturbance, ensuring the integrity of the original soil sample, and the inner ring cutter, middle ring cutter and outer ring cutter are nested in stages through internal and external threads to form a staged locking structure, realizing the rapid switching of three diameter specifications and improving the versatility of the equipment. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a single-acting threaded multi-specification soil sampler provided by this utility model.

[0015] Figure 2 A top view of a single-acting threaded multi-specification soil sampler provided by this utility model.

[0016] Figure 3 A partial sectional view of a single-acting threaded multi-specification soil sampler provided by this utility model.

[0017] Figure 4 This utility model Figure 3 A magnified view of a portion of point A in the middle.

[0018] Figure 5 This utility model Figure 3 The image at point A is a magnified view of the inner ring cutter.

[0019] Figure 6 This utility model Figure 3 The image at point A is now a magnified view of the central ring scalpel.

[0020] Figure 7 This utility model Figure 3 The image at point A is now a magnified view of the outer ring cutter.

[0021] Figure 8 This utility model provides a structural schematic diagram of the connecting disc in a single-acting threaded multi-specification soil sampler.

[0022] Reference numerals: 1-bracket, 2-connecting rod, 20-force-applying protrusion, 3-rotating handwheel, 30-force-applying groove, 4-bearing, 5-connecting disc, 50-slot, 51-first locking block, 52-second locking block, 6-inner ring cutter, 7-middle ring cutter, 8-outer ring cutter. Detailed Implementation

[0023] The specific implementation method is described below with reference to the accompanying drawings.

[0024] Example

[0025] like Figures 1 to 8 As shown in this embodiment, a single-action threaded multi-specification soil sampler is disclosed, including a support 1. The support 1 is threadedly connected to a vertically movable connecting rod 2. A rotating handwheel 3 is provided at the upper end of the connecting rod 2, and a bearing 4 is coaxially connected to the lower end of the connecting rod 2. A connecting disc 5 is movably sleeved on the bearing 4. An inner ring cutter 6 is threadedly connected to the outer circumference of the connecting disc 5. A middle ring cutter 7 is threadedly connected to the outer circumference of the inner ring cutter 6, and an outer ring cutter 8 is threadedly connected to the outer circumference of the middle ring cutter 7. Specifically, the connecting rod 2 cooperates with the connecting disc 5 through the bearing 4 to convert the torque of the rotating handwheel 3 into a linear force in a single direction (vertically downward), thereby decoupling the rotational motion from the vertical motion. When the rotating handwheel 3 drives the connecting rod 2 to rotate, the bearing 4 allows the connecting disc 5 to bear only the vertical pressure, preventing the ring cutter from rotating with the load, reducing soil disturbance, and ensuring the integrity of the undisturbed soil sample. The inner ring cutter 6, middle ring cutter 7, and outer ring cutter 8 are nested stepwise through internal and external threads, forming a stepwise locking structure. When a vertical force is applied, the thread engagement force of each ring cutter layer is superimposed, forming an overall rigid support and suppressing relative movement. Simultaneously, it allows for rapid switching between three diameter specifications (e.g., φ50mm, φ60mm, φ70mm) without disassembling the entire device; simply rotating the ring cutter is sufficient to switch between different specifications. Different specifications of ring cutters can adapt to the soil sample size requirements of different testing standards, improving the equipment's versatility. After digging the soil sample to the desired depth, rotate the handwheel 3 in the opposite direction to reset the soil sampling device and remove the sample. Then, rotate and disassemble the corresponding ring cutter to collect the soil sample, completing the entire soil sampling process. It should be noted that the outer circumferential thread of the connecting disc 5 mates with the inner thread of the inner ring cutter 6, the outer thread of the inner ring cutter 6 mates with the inner thread of the middle ring cutter 7, and the outer thread of the middle ring cutter 7 mates with the inner thread of the outer ring cutter 8. The threads can be M-series standard fine threads, whose smaller lead angle (usually smaller than the friction angle) can enhance self-locking and prevent loosening.

[0026] Furthermore, in specific implementation, such as Figure 8 As shown, the connecting disc 5 provided in this embodiment of the present invention is formed by hinged assembly of a first locking block 51 and a second locking block 52. Both the first locking block 51 and the second locking block 52 have slots 50 for engaging the bearing 4. Specifically, the split design of the first locking block 51 and the second locking block 52 allows the bearing 4 to be inserted in the open state, which is particularly suitable for bearing 4 maintenance or replacement scenarios. Simultaneously, the connection between the inner ring cutter 6 and the connecting disc 5 serves to close and limit the connection of the connecting disc 5. It should be noted that the hinge shafts of the first locking block 51 and the second locking block 52 are embedded within the first locking block 51 and the second locking block 52, and do not interfere with the inner ring cutter 6 in the closed state, ensuring a smooth connection between the inner ring cutter 6 and the connecting disc 5.

[0027] Preferably, the slot 50 is a stepped semi-circular slot, and the projection of the slot 50 onto the splice seam plane is an inverted T-shape. The inverted T-shaped projection slot 50 cooperates with the stepped structure of the outer ring of the bearing 4 to form an axial limit, preventing the bearing 4 from being dislodged due to reaction force during the application of force, and ensuring the stability of the device. The slots 50 of the first locking block 51 and the slots 50 of the second locking block 52 are engaged to form a cavity that accommodates the bearing 4 and the end of the connecting rod 2.

[0028] Furthermore, in a specific implementation, the connecting rod 2 provided in this embodiment of the present invention has a force-applying protrusion 20 at its top end, and a force-applying groove 30 that mates with the force-applying protrusion 20 is provided at the center of the rotating handwheel 3. The mate between the force-applying protrusion 20 and the force-applying groove 30 enables instantaneous alignment and installation of the rotating handwheel 3 and the connecting rod 2 without the need for additional fasteners, thus improving operational efficiency.

[0029] Preferably, the force-applying protrusion 20 is cross-shaped, and the force-applying groove 30 is a cross-shaped groove. The cross-shaped structure provides a four-way force-bearing surface, which, compared with the straight-line design, results in more uniform torque transmission, reduces local stress concentration, and extends the service life of the component.

[0030] Furthermore, in a specific implementation, the lower outer periphery of the connecting disc 5 provided in this embodiment of the present invention is provided with an external thread that mates with the inner ring cutter 6. Specifically, the upper outer periphery of the connecting disc 5 is unthreaded, and the inner ring cutter 6, the middle ring cutter 7, and the outer ring cutter 8 are only threaded in their upper halves, with the lower halves being smooth. When the inner ring cutter 6 is screwed into the threaded end of the connecting disc 5, it tightly engages with the connecting disc 5. The inner ring cutter 6 serves as a base, and the middle ring cutter 7 and the outer ring cutter 8 expand sequentially through threaded nesting, forming a hierarchical structure. Figures 5 to 7 The diagram shows the switching states of the inner ring cutter 6, the middle ring cutter 7, and the outer ring cutter 8.

[0031] Furthermore, in specific implementations, the rotating handwheel 3 provided in this embodiment of the present invention is covered with an anti-slip layer. Specifically, the anti-slip layer is made of rubber material, which enhances the friction of operating the rotating handwheel 3, prevents slippage and accidental damage when force is applied, and ensures a stable grip even in wet or muddy environments, reducing hand fatigue.

[0032] Furthermore, in specific implementation, the support 1 provided in this embodiment of the present invention is a tripod, and the bottom of the support 1 is provided with an anti-slip pad. Specifically, the anti-slip pad can be a polyurethane anti-slip pad, and its bottom is provided with a serrated gripping structure to embed into the loose soil, preventing the support 1 from sliding when force is applied and ensuring accurate sampling position.

Claims

1. A single-acting, multi-specification threaded soil sampler, characterized in that, Includes a bracket (1), the bracket (1) is threadedly connected to a vertically movable connecting rod (2), the upper end of the connecting rod (2) is provided with a rotating handwheel (3), the lower end of the connecting rod (2) is coaxially connected to a bearing (4), the bearing (4) is movably sleeved with a connecting disc (5), the outer circumference of the connecting disc (5) is threadedly connected to an inner ring cutter (6), the inner ring cutter (6) is threadedly connected to a middle ring cutter (7), and the middle ring cutter (7) is threadedly connected to an outer ring cutter (8).

2. The single-acting threaded multi-specification soil sampler according to claim 1, characterized in that, The connecting plate (5) is formed by hinged assembly of a first locking block (51) and a second locking block (52). Both the first locking block (51) and the second locking block (52) have slots (50) for engaging the bearing (4).

3. A single-acting threaded multi-specification soil sampler according to claim 2, characterized in that, The slot (50) is a stepped semi-circular slot, and the projection of the slot (50) onto the splice seam plane is an inverted T shape.

4. A single-acting threaded multi-specification soil sampler according to claim 1, characterized in that, The top of the connecting rod (2) is provided with a force-applying protrusion (20), and the center of the rotating handwheel (3) is provided with a force-applying groove (30) that cooperates with the force-applying protrusion (20).

5. A single-acting threaded multi-specification soil sampler according to claim 4, characterized in that, The force-applying protrusion (20) is cross-shaped, and the force-applying groove (30) is a cross-shaped groove.

6. A single-acting threaded multi-specification soil sampler according to claim 1, characterized in that, The lower outer periphery of the connecting disc (5) is provided with an external thread that mates with the inner ring cutter (6).

7. A single-acting threaded multi-specification soil sampler according to claim 1, characterized in that, The rotating handwheel (3) is covered with an anti-slip layer.

8. A single-acting threaded multi-specification soil sampler according to claim 1, characterized in that, The support (1) is a tripod, and the bottom of the support (1) is provided with an anti-slip pad.

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