Portable multi-hole soil sampler

Abstract

The utility model relates to test sampling and engineering soil sampling technical field, the utility model provides a kind of portable multi-aperture soil sampler, including screw rod, screw rod one end coaxially is provided with first ring cutter, the outer diameter of first ring cutter is greater than the outer diameter of screw rod, screw rod is threadedly connected with second ring cutter and third ring cutter, the opening direction of third ring cutter is identical with the opening direction of first ring cutter, third ring cutter is telescopically set in first ring cutter outer, the opening direction of second ring cutter is opposite with the opening direction of first ring cutter, screw rod other end is equipped with the limiting block for limiting second ring cutter outer stretch, by screw rod integration first ring cutter, second ring cutter and third ring cutter, realize one ware multiuse, without carrying multiple independent soil sampler, significantly improve portability, reduce equipment carrying burden.

Description

Technical Field

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

[0002] Accurate determination of the physical and mechanical properties of soil is a crucial step in geological engineering investigation, geotechnical engineering design, and construction quality control. Obtaining representative undisturbed soil samples is a prerequisite for conducting relevant tests. Soil samplers, as the core tool for obtaining underground soil samples, are widely used in various engineering sites to meet the sampling needs of different depths, soil types, and test specifications (especially soil samples with different pore sizes). In engineering practice, it is often necessary to collect soil samples of various specifications for analysis at the same site, which requires soil sampling equipment to have good adaptability and portability.

[0003] Traditional soil sampling techniques primarily rely on single-aperture soil samplers. When projects require soil samples of different diameters, technicians must carry multiple independent samplers with varying apertures, increasing their carrying burden and impacting work efficiency. Furthermore, during operation, operators typically rely solely on their hands to grip the limited portion of the main shaft to apply downward force. This method of applying force is not only limited in its grip and prone to slippage, leading to instability and vibration of the sampler, but also makes it difficult to ensure that the pressure applied to the ground is strictly vertically downward. This can easily cause lateral compression or shear disturbance to the soil during penetration, damaging the original structure and stress state of the soil sample. Consequently, it alters key physical and mechanical properties (such as density, water content, compressibility, and shear strength), making subsequent laboratory test data unable to accurately reflect the engineering characteristics of the in-situ soil and ultimately affecting the accuracy of engineering assessments. Utility Model Content

[0004] The purpose of this invention is to provide a portable multi-aperture soil sampler, which solves the problems of traditional soil samplers being inconvenient to carry and laborious to operate.

[0005] This utility model is achieved through the following technical solution: a portable multi-aperture soil sampler, including a screw, a first ring cutter coaxially arranged at one end of the screw, the outer diameter of the first ring cutter being larger than the outer diameter of the screw, a second ring cutter and a third ring cutter threadedly connected to the screw, the opening direction of the third ring cutter being the same as the opening direction of the first ring cutter, the third ring cutter being retractably sleeved outside the first ring cutter, the opening direction of the second ring cutter being opposite to the opening direction of the first ring cutter, and a limiting block for limiting the extension of the second ring cutter at the other end of the screw.

[0006] Furthermore, the screw is provided with a partition for separating the second ring cutter and the third ring cutter.

[0007] Furthermore, the screw threads on both sides of the partition are in opposite directions.

[0008] Furthermore, the length of the screw between the partition and the first ring cutter is the same as the length of the third ring cutter.

[0009] Furthermore, buffer pads are detachably connected to both sides of the partition.

[0010] Furthermore, the outer wall of the second ring cutter near the end of the first ring cutter is circumferentially distributed with first supporting rods that are radially outwardly supported.

[0011] Furthermore, the outer wall of the middle part of the third ring cutter is evenly distributed with second supporting rods that are radially outward.

[0012] Furthermore, the first, second, and third ring cutters have the same wall thickness, and their inner diameters increase progressively.

[0013] This utility model has at least the following advantages and beneficial effects: by integrating the first ring cutter, the second ring cutter and the third ring cutter with a screw, it can achieve multiple uses with one device, eliminating the need to carry multiple independent soil sampling devices, significantly improving portability and reducing the burden of carrying equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a portable multi-aperture soil sampler provided by this utility model.

[0015] Figure 2 A cross-sectional view of a portable multi-aperture soil sampler provided by this utility model.

[0016] Figure 3 A schematic diagram of the screw structure in a portable multi-aperture soil sampler provided by this utility model.

[0017] Reference numerals in the attached drawings: 1-screw, 11-limiting block, 12-partition, 2-first ring cutter, 3-second ring cutter, 31-first holding rod, 4-third ring cutter, 41-second holding rod. Detailed Implementation

[0018] The specific implementation method is described below with reference to the accompanying drawings.

[0019] Example

[0020] like Figures 1 to 3As shown, this embodiment mainly discloses a portable multi-aperture soil sampler, including a screw 1. A first ring cutter 2 is coaxially arranged at one end of the screw 1. The outer diameter of the first ring cutter 2 is larger than the outer diameter of the screw 1. A second ring cutter 3 and a third ring cutter 4 are threadedly connected to the screw 1. The opening direction of the third ring cutter 4 is the same as the opening direction of the first ring cutter 2. The third ring cutter 4 is telescopically sleeved outside the first ring cutter 2. The opening direction of the second ring cutter 3 is opposite to the opening direction of the first ring cutter 2. A limiting block 11 is provided at the other end of the screw 1 to limit the outward extension of the second ring cutter 3. Specifically, the first ring cutter 2 and the limiting block 11 are respectively welded to the end of the screw 1. Since the outer diameter of the first ring cutter 2 is larger than the outer diameter of the screw 1, the inner end of the first ring cutter 2 abuts against the inner end of the third ring cutter 4 to limit the maximum outward extension distance of the third ring cutter 4. The limiting block 11 abuts against the inner end of the second ring cutter 3 to limit the maximum outward extension distance of the second ring cutter 3. In the initial state, both the second ring cutter 3 and the third ring cutter 4 are in the retracted position, meaning the cutting edges of the open ends of the second ring cutter 3 and the third ring cutter 4 are within the range of the screw 1, resulting in a compact structure and small footprint. The first ring cutter 2 can be used from the initial state. When switching to the second ring cutter 3, flip the soil sampler so that the end of the second ring cutter 3 faces vertically downwards, and manually unscrew the second ring cutter 3 until it abuts against the limiting block 11. When switching to the third ring cutter 4, manually unscrew the third ring cutter 4 until it abuts against the first ring cutter 2. The screw 1 integrates the first ring cutter 2, the second ring cutter 3, and the third ring cutter 4, achieving multi-purpose functionality with a single device. This eliminates the need to carry multiple independent soil samplers, significantly improving portability and reducing the burden of carrying equipment.

[0021] Furthermore, in a specific implementation, the screw 1 provided in this embodiment of the present invention is provided with a partition 12 for separating the second ring cutter 3 and the third ring cutter 4. Specifically, the partition 12 is welded to the screw 1 as a whole, physically separating the second ring cutter 3 and the third ring cutter 4, preventing collisions or interference when they move on the screw 1, and ensuring that each ring cutter works independently and stably. At the same time, the partition 12 can limit the extreme positions of the inward retraction of the second ring cutter 3 and the third ring cutter 4.

[0022] Furthermore, in specific implementations, the screw 1 provided in this embodiment of the present invention has threaded teeth on both sides of the partition 12 in opposite directions. Specifically, since the openings of the second ring cutter 3 and the third ring cutter 4 face opposite directions, when the second ring cutter 3 and the third ring cutter 4 are facing the ground respectively, they can be manually screwed in the same direction, which facilitates operation.

[0023] Furthermore, in specific implementation, the length of the screw 1 between the partition 12 and the first ring cutter 2 provided in this embodiment of the present invention is the same as the length of the third ring cutter 4. This ensures that the third ring cutter 4 completely encloses the first ring cutter 2 when it retracts, with no exposed cutting edge. At the same time, when the third ring cutter 4 retracts, the first ring cutter 2 extends completely outwards. When the first ring cutter 2 collects soil samples, the sampling is completed when the cutting edge of the third ring cutter 4 contacts the ground.

[0024] Furthermore, in a specific implementation, the partition 12 provided in this embodiment of the present invention is detachably connected to both sides with buffer pads. Specifically, the buffer pads can be made of elastic rubber and are connected to the ends of the partition 12 by adhesive bonding. This can absorb the impact force of the collision when the second ring cutter 3 and the third ring cutter 4 are moved, reduce the hard contact between the ring cutter and the partition 12, extend the service life of the equipment, and reduce component wear.

[0025] Furthermore, in specific implementation, the second ring cutter 3 provided in this embodiment of the present invention has radially outwardly supported first holding rods 31 evenly distributed on the outer wall circumferentially near the end of the first ring cutter 2. Specifically, at least two first holding rods 31 are provided, offering multiple gripping points to facilitate vertical force application by the operator. In addition, the inner cavity length of the third ring cutter 4 is twice the length of the first ring cutter 2, and the distance from the lower end of the first holding rod 31 to the cutting edge of the third ring cutter 4 can be equal to the length of the first ring cutter 2. When the third ring cutter 4 is sampling, the sampling is completed when the end face of the first holding rod 31 contacts the ground, which to a certain extent ensures that the sampling lengths of the first ring cutter 2 and the third ring cutter 4 are the same.

[0026] Furthermore, in specific implementation, the third ring cutter 4 provided in this embodiment of the present invention has radially outwardly supported second holding rods 41 evenly distributed around its outer wall. Specifically, both the first holding rod 31 and the second holding rod 41 are wrapped with anti-slip sleeves to enhance friction during gripping, prevent slippage, improve stability during soil sampling, and reduce soil sample disturbance caused by shaking. When the second ring cutter 3 takes a sample, the sampling is complete when the end face of the second holding rod 41 contacts the ground.

[0027] Furthermore, in specific implementations, the first ring cutter 2, the second ring cutter 3, and the third ring cutter 4 provided in this embodiment of the present invention have the same wall thickness, and the inner diameters of the first ring cutter 2, the second ring cutter 3, and the third ring cutter 4 increase progressively. Specifically, the wall thickness of the first ring cutter 2, the second ring cutter 3, and the third ring cutter 4 ranges from 1.5 mm to 3.0 mm. The inner diameter of the first ring cutter 2 is 80 mm, the inner diameter of the second ring cutter 3 is 90 mm, and the inner diameter of the third ring cutter 4 is 100 mm.

Claims

1. A portable multi-aperture soil sampler, characterized in that, The screw (1) includes a screw rod (1), one end of which is coaxially provided with a first ring cutter (2), the outer diameter of the first ring cutter (2) being larger than the outer diameter of the screw rod (1). The screw rod (1) is threadedly connected with a second ring cutter (3) and a third ring cutter (4), the opening direction of the third ring cutter (4) being the same as the opening direction of the first ring cutter (2), the third ring cutter (4) being telescopically sleeved outside the first ring cutter (2), the opening direction of the second ring cutter (3) being opposite to the opening direction of the first ring cutter (2), and the other end of the screw rod (1) being provided with a limiting block (11) for limiting the extension of the second ring cutter (3).

2. The portable multi-aperture soil sampler according to claim 1, characterized in that, The screw (1) is provided with a partition (12) for separating the second ring cutter (3) and the third ring cutter (4).

3. A portable multi-aperture soil sampler according to claim 2, characterized in that, The screw (1) has opposite threads on both sides of the partition (12).

4. A portable multi-aperture soil sampler according to claim 2, characterized in that, The length of the screw (1) between the partition (12) and the first ring cutter (2) is the same as the length of the third ring cutter (4).

5. A portable multi-aperture soil sampler according to claim 2, characterized in that, The two sides of the partition (12) are respectively detachably connected to buffer pads.

6. A portable multi-aperture soil sampler according to claim 1, characterized in that, The second ring cutter (3) has first supporting rods (31) evenly distributed radially outward on the outer wall near the end of the first ring cutter (2).

7. A portable multi-aperture soil sampler according to claim 1, characterized in that, The third ring cutter (4) has a second holding rod (41) that is radially outwardly supported evenly distributed on the outer wall of the middle part.

8. A portable multi-aperture soil sampler according to claim 1, characterized in that, The first ring cutter (2), the second ring cutter (3), and the third ring cutter (4) have the same wall thickness, and the inner diameters of the first ring cutter (2), the second ring cutter (3), and the third ring cutter (4) increase progressively.

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