Portable undisturbed soil column sampler

Abstract

The utility model provides a portable undisturbed soil column sampler which comprises a drill bit, a guide rail, a counter weight and a handle, one end of the guide rail is detachably connected with the drill bit, the other end of the guide rail is detachably connected with the handle, and the interior of the drill bit is of a cavity structure capable of containing a soil sample. The heavy hammer is used for sampling a soil sample into the cavity by impacting one end of the drill bit. Under the clamping of the impact force of the heavy hammer, when the drill bit is used for sampling, the drill bit can be conveniently inserted into soil, an undisturbed soil column can be collected under the condition that the soil structure is not disturbed, the operation is simple and convenient, manpower is saved, and the sampling efficiency is also improved; after sampling is finished, the drill bit, the guide rail, the heavy hammer and the handle can be detached, and outdoor carrying is convenient. The device is simple in structure, good in using effect and easy to popularize and use.

Description

Technical Field

[0001] The utility model relates to the technical field of soil sampling equipment, in particular to a portable undisturbed soil column sampler. Background Art

[0002] Soil occurs on the earth's land surface and is composed of minerals, organic matter, moisture, air and various soil organisms. The physical and chemical properties of the soil and the soil biological community living therein have obvious vertical distribution characteristics. Among them, the physical structure of the soil is easily affected by the sampling method, and it is crucial to collect undisturbed soil columns in the natural state for scientific research. At present, there are many soil column samplers, such as soil drills. Although soil drills can obtain soil samples by rotating the drill bit, the samples drilled are easily damaged. More and more researchers use a hammer to strike the drill bit deep into the soil to obtain undisturbed soil column samples. However, in the process of manually controlling the running track and striking force of the hammer, due to the instability of the control, the hammer often misses or even hits the arm, which is time-consuming and laborious, with low sampling efficiency and certain danger in operation. Therefore, it is of practical significance to develop a portable undisturbed soil column sampler. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model discloses a portable undisturbed soil column sampler, which saves labor, is convenient to use, maintain and carry, and improves the working efficiency of soil sampling.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] The utility model provides a portable undisturbed soil column sampler, which includes a drill bit, a guide rail, a heavy hammer and a handle. One end of the guide rail is detachably connected to the handle, and the other end is detachably connected to the drill bit. The inside of the drill bit is a hollow structure to form a cavity capable of accommodating samples. The heavy hammer can slide on the guide rail, and the heavy hammer strikes the drill bit to sample undisturbed soil samples into the cavity.

[0006] In a feasible embodiment, one end of the drill bit is provided with a blade, and the other end of the drill bit is provided with a first connection hole detachably connected to the guide rail.

[0007] In a feasible embodiment, the first connection hole is a threaded hole, and one end of the guide rail connected to the drill bit is a threaded port.

[0008] In a feasible embodiment, the drill bit includes a connection part and a drill barrel. One end of the connection part is connected to the drill barrel, and the other end is detachably connected to the guide rail. The cavity is formed in the drill barrel. The drill barrel is provided with a slot, and the slot communicates with the cavity. The slot extends along the central axis direction of the drill barrel, and the slot is symmetrically arranged on the drill barrel.

[0009] In a feasible embodiment, scale lines are provided on the outer wall of the drill tube.

[0010] In a feasible embodiment, a push plate capable of moving along the central axis direction of the drill tube is provided in the cavity. Two handles corresponding to the slots are hinged on the push plate. The two handles are symmetrically arranged on the push plate, and the handles can rotate to extend outside the drill tube through the slots or be received in the cavity.

[0011] In a feasible embodiment, the diameter of the guide rail is greater than the diameter of the first connection hole at one end of the drill bit, and the diameter of the guide rail is less than the diameter of the drill tube.

[0012] In a feasible embodiment, the weight is a cylinder, and a slideway is provided at the central axis of the weight. The diameter of the slideway is greater than the diameter of the guide rail, and the guide rail passes through the slideway for the weight to move up and down along the guide rail.

[0013] In a feasible embodiment, a second connection hole is provided at the center of the handle. The second connection hole is a threaded hole, and one end of the guide rail connected to the handle is a threaded port.

[0014] The beneficial effects of the present utility model are as follows: The present utility model provides a portable undisturbed soil column sampler, including a drill bit, a guide rail, a weight, and a handle. One end of the guide rail is detachably connected to the drill bit, and the other end is detachably connected to the handle. The inside of the drill bit is a cavity structure capable of accommodating soil samples. The weight impacts one end of the drill bit to sample the soil sample into the cavity. With the impact force of the weight, when sampling with the drill bit, the drill bit can be easily inserted into the soil, and undisturbed soil columns can be collected without disturbing the soil structure. It is not only simple and convenient to operate, saves manpower, but also improves the sampling efficiency. After sampling, the components of the drill bit, guide rail, weight, and handle can be disassembled, which is convenient for outdoor carrying. The structure of the present utility model is simple, has good use effects, and is easy to promote and use. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the portable undisturbed soil column sampler of the present utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the push plate and handle of the portable undisturbed soil column sampler of the present utility model.

[0017] Wherein: 1. Drill bit; 11. Blade; 12. First connection hole; 13. Connection part; 14. Drill barrel; 141. Groove; 142. Scale line; 143. Push plate; 144. Handle; 2. Guide rail; 21. Threaded opening; 3. Plumb bob; 31. Slideway; 4. Handle; 41. Second connection hole. Specific embodiments

[0018] The following combines the accompanying drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] Please refer to the attached Figure 1-2 , a portable undisturbed soil column sampler in this embodiment, includes a drill bit 1, a guide rail 2, a plumb bob 3 and a handle 4. One end of the guide rail 2 is detachably connected to the handle 4, and the other end is detachably connected to the drill bit 1. The inside of the drill bit 1 is a hollow structure to form a cavity capable of accommodating a sample. The plumb bob 3 can be sleeved on the guide rail 2, and the plumb bob 3 samples the undisturbed soil sample into the cavity by hitting the drill bit 1.

[0020] In this application, the quick soil column sampler is applicable to soil sampling or other occasions that require drilling and sampling.

[0021] In this application, the detachable connection method between the guide rail 2 and the drill bit 1 or the handle 4 is a threaded connection, which is realized by the screwing of the internal threaded opening 21 and is one of the most commonly used detachable connection methods.

[0022] In this embodiment, the detachable connection facilitates the replacement of drill bits 1 of different sizes to adapt to different sampling occasions. The inner diameter of the drill bit 1 is 3 - 7 cm; the length of the drill bit 1 is 10 - 40 cm. Preferably, by setting drill bits 1 with different inner diameters and lengths, selection can be made according to needs. For example, a sampler with an inner diameter of 5 - 7 cm of the drill bit 1 can be used to collect samples of medium and small soil animals; a sampler with an inner diameter of 3 - 5 cm of the drill bit 1 can be used to collect soil samples for analyzing soil physical and chemical indicators, and it has a wide range of applications.

[0023] Furthermore, the materials of the drill bit 1, the guide rail 2, the plumb bob 3 and the handle 4 are steel or alloy. The sampler made of steel or alloy material will not only not contaminate the soil sample, but also ensure that the sampler is not easily deformed and worn, and prolongs the service life.

[0024] When the present invention is actually used, for different soils, there are two sampling methods, specifically:

[0025] 1. Press-in method: Generally applicable to sampling of relatively soft soil. On the premise of ensuring that the soil sample is not disturbed during sampling, connect the guide rail 2 with the drill bit 1 and the handle 4, place the sampler vertically on the soil surface, press the drill bit down through the handle 4, and after extracting the sampler, the soil sample in the drill bit 1 can be taken out through the slot 141. This method is quick and easy to operate, and can reduce the disturbance to the soil, but it is only suitable for sampling of relatively soft soil with a depth of 0 - 10 cm.

[0026] 2. Impact method: Generally applicable to sampling of relatively hard and firm soil. Assemble and connect the drill bit 1, the guide rail 2, the heavy hammer 3 and the handle 4. Slide the heavy hammer 3 to one end of the guide rail 2 towards the handle 4 and release it, and rely on gravity to strike the drill bit 1, or hold the heavy hammer 3 and accelerate to strike the drill bit 1. After the drill bit 1 penetrates to the depth of the collected soil, use the handle 4 to extract the sampler, and take out the soil sample in the drill bit 1 through the slot 141. This method is fast, labor-saving and efficient in sampling, so this method is generally adopted. In order to facilitate the heavy hammer 3 to strike the drill bit 3, the diameter of the guide rail 2 is larger than the diameter of the connecting hole 12 at one end of the drill bit 1, and the diameter of the guide rail 2 is smaller than the diameter of the drill cylinder 14.

[0027] In a feasible embodiment, one end of the drill bit 1 is provided with a blade 11, and the other end of the drill bit 1 is provided with a connecting hole 12 detachably connected to the guide rail 2. Since the drill bit 1 in this embodiment is provided with the blade 11, it can quickly open a hole in the soil to be sampled, and at the same time, different-sized holes can be opened according to the sampling requirements.

[0028] In a feasible embodiment, the first connecting hole 12 is a threaded hole, and one end of the guide rail 2 connected to the drill bit 1 is a threaded port 21. In this embodiment, since the drill bit 1 and the guide rail 2 are connected through the threaded hole and the threaded port 21, they can be easily installed and disassembled, which is convenient for maintenance and repair.

[0029] In a feasible embodiment, the drill bit 1 includes a connecting portion 13 and a drill cylinder 14. One end of the connecting portion 13 is connected to the drill cylinder 14, and the other end is detachably connected to the guide rail 2. The cavity is formed inside the drill cylinder 14. The drill cylinder 14 is provided with a slot 141, and the slot 141 communicates with the cavity. The slot 141 extends along the central axis direction of the drill cylinder 14. There are two slots 141, and the two slots 141 are symmetrically arranged on the drill cylinder 14. In this embodiment, the required soil sample can be taken out through the slot 141, and each component is easy to disassemble after sampling, which is very convenient for outdoor carrying.

[0030] In a feasible embodiment, scale lines 142 are provided on the outer wall of the drill barrel 14. Multiple scale lines 142 can be provided, and the interval between the scale lines 142 is 5 cm. Specifically, 4 scale lines 142 are provided on the outer wall of the drill barrel 14, which are sequentially marked as 5 cm, 10 cm, 15 cm, and 20 cm from the cutting edge 11 to the connection hole 12. According to these scale lines 142, soil samples at different vertical depths can be taken as required during sampling.

[0031] In a feasible embodiment, a push plate 143 capable of moving along the central axis direction of the drill barrel 14 is provided in the cavity. Two handles 144 corresponding to the slots 141 are hinged on the push plate 143. The two handles 144 are symmetrically arranged on the push plate 143, and the handles 144 can rotate to extend outside the drill barrel 14 through the slots 141 or be received in the cavity. Since a cavity is provided inside the drill bit 1, when sampling is completed, once the structure of the sample is relatively compact or has a high adhesion, the sample inside the drill bit 1 forms extrusion on the inner wall of the drill bit 1 or adheres inside the drill bit 1, making it difficult to take out the sample. Taking out the sample only through the slots 141 easily damages the integrity of the sample. In this embodiment, however, since the push plate 143 is provided in the cavity, when sampling the soil, the drill bit 1 gradually penetrates into the soil, and the sample continuously enters the cavity, while pushing the push plate 143 and its hinged handles 144 to move towards the connection hole 12. When sampling is completed, the drill bit 1 is taken out together with the sample. At this time, the handles 144 can be rotated from the cavity to the outside of the drill bit 1 through the slots 141, and the push plate 143 is pushed in a direction away from the connection hole 12 by holding the handles 144. The sample in the cavity is separated from the cavity under the pushing action of the push plate 143, ensuring the integrity of the sample.

[0032] In a feasible embodiment, one end of the drill barrel 14 in contact with the sample is in a flared shape, and the diameter of the end of the drill barrel 14 connected to the guide rail 2 is larger than the diameter of the end in contact with the sample. In practical applications, if the structure of the sample is relatively loose, when sampling with a straight drill barrel 14, it may cause the sample to fall out of the drill barrel 14 when the drill bit 1 is taken out, resulting in sampling failure. In this embodiment, however, since one end of the drill barrel 14 in contact with the sample is in a flared shape, the flared end can block the sample, ensuring that the soil that has entered the cavity when the drill bit 1 is taken out will not scatter due to the movement of the drill bit 1.

[0033] In a feasible embodiment, threaded ports 21 are provided at both ends of the guide rail 2. The length of the guide rail 2 is 40 - 80 cm. By setting guide rails 2 of different lengths, selection can be made according to the requirements of different soil hardnesses and textures. For example, for collecting hard soil samples, a sampler with a guide rail 2 having a length of 60 - 80 cm can be used, and the drill bit 1 can be driven deeper into the soil by increasing the impact force of the weight; for collecting soft soil samples, a sampler with a guide rail 2 having a length of 40 - 60 cm can be used, which has a wide range of sampling occasions.

[0034] In a feasible embodiment, the weight 3 is a cylinder, and a slideway 31 is provided at the central axis of the weight 3. The diameter of the slideway 31 is larger than the diameter of the guide rail 2, and the guide rail 2 passes through the slideway 31 for the weight 3 to move up and down along the guide rail. The outer diameter of the weight 3 is 5 - 10 cm, and the height of the weight 3 is 10 - 20 cm, and selection can be made according to needs. In this embodiment, by hitting the drill bit 1 with the weight 3 along the guide rail 2, the installation and disassembly are convenient, so it saves time and effort and is convenient for maintenance and repair.

[0035] In a feasible embodiment, a second connection hole 41 is provided at the center of the handle 4. The second connection hole 41 is a threaded hole, and one end of the guide rail 2 connected to the handle 4 is a threaded port 21. In this embodiment, since the drill bit 1 and the handle 4 are connected through the threaded hole and the threaded port 21, the installation and disassembly can be easily performed, which is convenient for maintenance and repair.

[0036] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A portable undisturbed soil column sampler, characterized in that: The invention comprises a drill bit (1), a guide rail (2), a weight (3) and a handle (4); one end of the guide rail (2) is detachably connected to the handle (4), and the other end is detachably connected to the drill bit (1); the interior of the drill bit (1) is a hollow structure to form a cavity capable of accommodating a sample; the weight (3) can be slidably sleeved on the guide rail (2); and the weight (3) strikes the drill bit (1) to sample an original soil sample into the cavity.

2. The undisturbed soil column sampler according to claim 1, characterized in that: One end of the drill bit (1) is provided with a blade (11), and the other end of the drill bit (1) is provided with a first connection hole (12) which is detachably connected to the guide rail (2).

3. The undisturbed soil column sampler according to claim 2, characterized in that: The first connecting hole (12) is a threaded hole, and the end of the guide rail (2) connected to the drill bit (1) is a threaded opening (21).

4. The undisturbed soil column sampler according to claim 1, characterized in that: The drill bit (1) comprises a connecting portion (13) and a drill barrel (14); one end of the connecting portion (13) is connected to the drill barrel (14), and the other end is detachably connected to the guide rail (2); the cavity is formed in the drill barrel (14); a groove (141) is provided on the drill barrel (14); the groove (141) is connected to the cavity; the groove (141) extends along the central axis direction of the drill barrel (14); and the groove (141) is symmetrically arranged on the drill barrel (14).

5. The undisturbed soil column sampler according to claim 4, characterized in that: The outer wall of the drill tube (14) is provided with scale lines (142).

6. The undisturbed soil column sampler according to claim 5, characterized in that: A push plate (143) is provided in the cavity and can move along the central axis direction of the drill tube (14). Two handles (144) corresponding to the slot (141) are hinged on the push plate (143). The two handles (144) are symmetrically arranged on the push plate (143). The handles (144) can be rotated to extend to the outside of the drill tube (14) through the slot (141) or be received in the cavity.

7. The undisturbed soil column sampler according to claim 4, characterized in that: The diameter of the guide rail (2) is greater than the diameter of the first connecting hole (12) at one end of the drill bit (1), and the diameter of the guide rail (2) is smaller than the diameter of the drill tube (14).

8. The undisturbed soil column sampler according to claim 1, characterized in that: The weight (3) is a cylinder, and a slideway (31) is provided at the central axis of the weight (3). The diameter of the slideway (31) is greater than the diameter of the guide rail (2). The guide rail (2) passes through the slideway (31) to allow the weight (3) to move up and down along the guide rail.

9. The undisturbed soil column sampler according to claim 1, characterized in that: A second connection hole (41) is provided at the center of the handle (4), the second connection hole (41) is a threaded hole, and one end of the guide rail (2) connected to the handle (4) is a threaded opening (21).

Images