Portable sampling device

Abstract

The utility model provides a portable sampling device which comprises a sampling structure and an auxiliary structure which are fixedly connected through a connecting rod, the sampling structure comprises a sampling head and a push rod, the sampling head is cylindrical, one end of the sampling head is open, the other end of the sampling head is closed, and a first through hole is formed in the closed surface of the sampling head; the pushing rod comprises a pushing end and a connecting end, the pushing end is provided with a pushing disc matched with the inner cavity of the sampling head, and the connecting end is provided with a first external thread along the circumferential surface; the pushing end penetrates through the first through hole and is internally sleeved in the sampling head, and the pushing disc is positioned in an inner cavity of the sampling head and can reciprocate along the inner cavity; and the push rod is movably connected with the sampling head through a bolt and nut structure. According to the portable sampling device disclosed by the utility model, the sampling structure is designed into a piston structure to push out the soil sample in the inner cavity of the sampling head, so that the soil sample with a complete structure is obtained, the sampling efficiency is improved, and the sampling device has a wide application prospect.

Description

A portable sampling device Technical Field

[0001] This application relates to the field of geological exploration sampling equipment technology, and in particular to a portable sampling device. Background Technology

[0002] Geological exploration sampling equipment includes manual and non-manual rock and soil sampling devices. Non-manual rock and soil sampling devices are further divided into three main categories: electric, hydraulic, and pneumatic. They are mainly used for deep exploration, large-scale operations, or rock and soil sampling in hard rock strata. Manual rock sampling devices are used for sampling in sandy soil areas or soft muddy soil areas. During sampling, the operator usually holds a weighted rod and repeatedly hammers the sampling head in a vertical direction to insert the sampling head into the soil for sampling.

[0003] For example, Chinese invention patent application CN120352178 A discloses a multifunctional portable geological exploration soil sampler. The soil sampler includes a sampling head, a connecting rod, a guide sleeve, a movable rod, and a weight rod. The sampling head is detachably connected to one end of the connecting rod, and the guide sleeve is movably sleeved on the other end of the connecting rod. The guide sleeve can reciprocate along the axial direction of the connecting rod. A limiting structure is provided between the guide sleeve and the connecting rod to prevent the guide sleeve from detaching from the connecting rod in a direction away from the sampling head. One end of the movable rod is detachably connected to the end of the guide sleeve away from the sampling head. The movable rod is hollow inside to allow the connecting rod to extend into it. The weight rod is detachably connected to the other end of the movable rod.

[0004] After the soil sample is extracted from the ground using the aforementioned soil sampler, it remains inside the sampling head's cavity. Currently, there are two methods for removing the soil sample from the sampling head's cavity, but both have significant drawbacks: one is to use a tapping method to extract the sample, which easily damages the original structure of the soil sample, affecting the accuracy of subsequent testing and analysis; the other is to pump air into the soil sampler to push it out, which, although it can preserve the soil sample's structure to the greatest extent, suffers from cumbersome operation procedures and low sampling efficiency. Summary of the Invention

[0005] The purpose of this utility model embodiment is to provide a portable sampling device to solve the technical problems of soil sample damage and low efficiency in existing sampling devices during the sampling process. The specific technical solution is as follows:

[0006] This utility model provides a portable sampling device, including a sampling structure and an auxiliary structure, wherein the sampling structure and the auxiliary structure are fixedly connected by a connecting rod;

[0007] The sampling structure includes a sampling head and a push rod. The sampling head is cylindrical, with one end open and the other end closed. A first through hole is opened on the closed surface of the sampling head.

[0008] The push rod includes a push end and a connecting end. The push end is provided with a push disk that matches the inner cavity of the sampling head, and the connecting end is provided with a first external thread along its circumferential surface.

[0009] The pushing end passes through the first through hole and is fitted inside the sampling head. The pushing disk is located inside the inner cavity of the sampling head and can reciprocate along the inner cavity.

[0010] The push rod and the sampling head are movably connected by a bolt and nut structure;

[0011] The bolt and nut structure includes a first connecting bolt disposed on the pushing end near the top surface of the pushing disk and a second connecting bolt disposed on the closed surface near the first through hole, as well as a connecting nut disposed on the connecting end; both the first connecting bolt and the second connecting bolt are semi-circular bolts; when the first connecting bolt moves to the first through hole, it forms a connecting bolt with the second connecting bolt, and the connecting bolt is tightened or loosened by the connecting nut.

[0012] In one possible embodiment, the sampling head includes a closed-section sampling head and an open-section sampling head, as well as a first sampling head and a second sampling head fixedly installed between the closed-section sampling head and the open-section sampling head.

[0013] In one possible embodiment, both the first sampling head and the second sampling head are tile-shaped structures. The first sampling head is provided with a first protrusion and a first groove on both sides along the axial direction, and the second sampling head is provided with a second protrusion and a second groove on both sides along the axial direction.

[0014] The second groove engages with the first protrusion, and the second protrusion engages with the first groove, so that the first sampling head and the second sampling head are spliced ​​together to form a cylindrical structure, and the outer diameter of the cylindrical structure matches the inner diameter of the closed-section sampling head and the open-section sampling head.

[0015] In one possible embodiment, the two ends of the cylindrical structure are respectively provided with second external threads along the outer circumferential surface, the end of the closed section sampling head away from the closed surface is provided with a first internal thread along the inner circumferential surface, and the end of the open section sampling head is provided with a second internal thread along the inner circumferential surface; one end of the cylindrical structure is connected to the end of the closed section sampling head away from the closed surface through the first internal thread, and the other end of the cylindrical structure is connected to one end of the open section sampling head through the second internal thread.

[0016] In one possible embodiment, a sampling blade is provided at the other end of the open-section sampling head.

[0017] In one possible embodiment, the connecting nut includes a nut section and an operating section;

[0018] The nut section is cylindrical, and the inner circumferential surface of the nut section is provided with a third internal thread that matches the connecting bolt;

[0019] The operating section is hexagonal prism-shaped, and a second through hole is provided at the center of the operating section along the axial direction.

[0020] The inner cavity of the nut section communicates with the second through hole so that the connecting end of the push rod can pass through.

[0021] In one possible embodiment, the nut segment and the operating segment are integrally formed, and the connecting nut moves on the push rod.

[0022] In one possible embodiment, the auxiliary structure includes a limiting sleeve and a limiting screw;

[0023] One end of the limiting sleeve is provided with a limiting hole; one end of the limiting screw is provided with a limiting protrusion, and the other end of the limiting screw is provided with a third external thread;

[0024] The end of the limiting screw near the third external thread passes through the limiting hole, and the limiting protrusion limits the limiting screw.

[0025] In one possible embodiment, the auxiliary structure further includes a plurality of extension rods, each of which has a first stud at one end and a first threaded hole that mates with the first stud at the other end along the axial direction;

[0026] The other end of the limiting sleeve is provided with a second stud, which cooperates with the first screw hole. The other end of the limiting sleeve is connected to one of the extension rods by a thread.

[0027] In one possible embodiment, one end of the connecting rod has a second threaded hole that mates with the first external thread, and the other end of the connecting rod has a third threaded hole that mates with the third external thread. One end of the connecting rod is threadedly connected to the connecting end of the push rod, and the other end of the connecting rod is threadedly connected to the other end of the limiting screw.

[0028] Beneficial effects: Compared with the prior art, this utility model provides an improved portable sampling device. This sampling device designs the sampling structure as a "piston structure" so that the extracted soil sample can be completely pushed out of the inner cavity of the sampling head. Specifically, the sampling structure includes a sampling head and a push rod. One end of the push rod is set in the inner cavity of the sampling head, and the other end passes through the first through hole on the closed surface of the sampling head and extends out of the closed end of the sampling head. A push plate is set at the end of the push rod located in the inner cavity. When the soil sample is in the inner cavity, it can be completely pushed out of the inner cavity of the sampling head by the push rod and the push plate to obtain a soil sample with a complete structure. At the same time, this "piston structure" is conducive to improving sampling efficiency and has broad application prospects.

[0029] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0030] 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.

[0031] Figure 1 is a cross-sectional view of the sampling structure in the portable sampling device of this utility model;

[0032] Figure 2 is a schematic diagram of the sampling head in the portable sampling device of this utility model;

[0033] Figure 3 is a cross-sectional view of the first sampling head and the second sampling head in the portable sampling device of this utility model;

[0034] Figure 4 is a diagram showing the combination of the first sampling head and the second sampling head in the portable sampling device of this utility model;

[0035] Figure 5 is a cross-sectional view of the closed-section sampling head in the portable sampling device of this utility model;

[0036] Figure 6 is a cross-sectional view of the sampling head with an open section in the portable sampling device of this utility model;

[0037] Figure 7 is a front view of the connecting nut in the portable sampling device of this utility model;

[0038] Figure 8 is a top view of the connecting nut in the portable sampling device of this utility model;

[0039] Figure 9 is a cross-sectional view of the auxiliary structure in the portable sampling device of this utility model;

[0040] Figure 10 is a cross-sectional view of the connecting rod in the portable sampling device of this utility model;

[0041] Figure 11 is a schematic diagram of the push rod in the portable sampling device of this utility model.

[0042] In the diagram, 1. Sampling head; 1-1. Closed-section sampling head; 1-1-1. First internal thread; 1-2. Open-section sampling head; 1-2-1. Second internal thread; 1-2-2. Sampling blade; 1-3. First sampling head; 1-3-1. First protrusion; 1-3-2. First groove; 1-4. Second sampling head; 1-4-1. Second protrusion; 1-4-2. Second groove; 2. Push rod; 2-1. Connecting end; 2-2. 1. Pushing end; 2.3. Pushing disc; 2.4. First external thread; 3. First through hole; 4.1. First connecting bolt; 4.2. Second connecting bolt; 4.3. Connecting nut; 4.3.1. Nut section; 4.3.2. Operating section; 4.3.3. Second through hole; 5. Limiting sleeve; 6. Limiting screw; 6.1. Limiting protrusion; 6.2. Third external thread; 7. Connecting rod; 7.1. Second screw hole; 7.2. Third screw hole. Detailed Implementation

[0043] 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 based on this application are within the protection scope of the present utility model.

[0044] This application mainly designs a portable sampling device for soil sampling operations in geological exploration. Existing sampling devices often retain soil samples inside the sampling head. Currently used soil sampling methods have significant drawbacks: striking the sampling head easily damages the original structure of the soil sample; while pumping air into the device to push out the soil sample results in low sampling efficiency.

[0045] Therefore, this application provides a portable sampling device, the basic concept of which is to design the sampling structure as a "piston structure". Specifically, the sampling structure includes a sampling head and a push rod. The push rod is fitted inside a through hole at one end of the sampling head. The end of the push rod located inside the sampling head is designed with a push disk that matches the inner cavity of the sampling head. When the soil sample is taken from the ground into the inner cavity of the sampling head, the operator can manually push the push rod and the push disk to move along the inner cavity of the sampling head to remove the soil sample from the inner cavity of the sampling head. This helps to improve sampling efficiency while maintaining the original structure of the soil sample.

[0046] Based on the above basic concept, the following are different embodiments for illustration:

[0047] A portable sampling device, as shown in Figures 1 and 11, includes a sampling structure and an auxiliary structure, which are fixedly connected by a connecting rod 7. The sampling structure includes a sampling head 1 and a pushing rod 2. The sampling head 1 is cylindrical, with one end open and the other end closed, and a first through hole 3 is formed on the closed surface. The pushing rod 2 includes a pushing end 2-2 and a connecting end 2-1. The pushing end 2-2 is provided with a pushing disk 2-3 that matches the inner cavity of the sampling head 1, and the connecting end 2-1 is provided with a first external thread 2-4 along its circumferential surface. The pushing end 2-2 passes through the first through hole 3 and is fitted inside the sampling head 1, and the pushing disk 2-3 is located within the sampling head. The sampling head 1 is located within the inner cavity of the push rod 2 and can reciprocate along the inner cavity. The push rod 2 and the sampling head 1 are movably connected by a bolt and nut structure. The bolt and nut structure includes a first connecting bolt 4-1 located on the push end 2-2 near the top surface of the push disk 2-3, a second connecting bolt 4-2 located on the closed surface near the first through hole 3, and a connecting nut 4-3 located on the connecting end 2-1. Both the first connecting bolt 4-1 and the second connecting bolt 4-2 are semi-circular bolts. When the first connecting bolt 4-1 moves to the first through hole 3, it forms a connecting bolt with the second connecting bolt 4-2. The connecting bolt is tightened or loosened by the connecting nut 4-3. It should be noted that although the second connecting bolt 4-2 is semi-circular, its central part should have a semi-circular notch to cooperate with the push rod 2.

[0048] In the above embodiment, the sampling structure includes a sampling head 1 and a push rod 2. The sampling head 1 and the push rod 2 are movably connected by a bolt and nut structure. One end of the push rod 2 located in the inner cavity of the sampling head 1 is designed with a push disk 2-3 for taking out soil samples. The other end of the push rod 2 extends out of the sampling head 1 and is used to connect with the auxiliary structure through a connecting rod 7.

[0049] During use, the operator connects the connecting rod 7 below the auxiliary structure, and the push rod 2 is connected below the connecting rod 7. The push rod 2 is fitted inside the cavity of the sampling head 1. By repeatedly swinging the auxiliary structure downwards, the operator impacts the sampling head 1 to move downwards and collect the sample. After sampling is completed, the soil sample is lifted from underground to the surface by lifting the auxiliary structure. At this time, the soil sample remains inside the cavity of the sampling head 1. The operator first removes the connecting rod 7 and the auxiliary structure from the sampling structure; then pushes the connecting end 2-1 of the push rod 2, causing the pushing end 2-2 of the push rod 2 to drive the pushing disc 2-3 downwards along the cavity of the sampling head 1 to push out the soil sample. This method of removing the soil sample not only preserves the original structure of the soil sample but also improves sampling efficiency.

[0050] In one embodiment, the sampling head 1 is an integrally stamped structure. This application provides a preferred embodiment, as shown in FIG2, where the sampling head 1 includes a closed-section sampling head 1-1 and an open-section sampling head 1-2, as well as a first sampling head 1-3 and a second sampling head 1-4 fixedly installed between the closed-section sampling head 1-1 and the open-section sampling head 1-2. In this embodiment, the sampling head 1 is designed to consist of four parts: the closed-section sampling head 1-1 at the top, the open-section sampling head 1-2 at the bottom, and the first sampling head 1-3 and the second sampling head 1-4 in the middle. In use, the four sampling heads are detachably assembled together to form a complete sampling head 1 for underground exploration sampling with the sampling device of this application. When the sampling device of this application brings the soil sample from underground to the surface, the soil sample is located inside the sampling head 1. At this time, the push rod 2 can be pushed to take a sample, or the four parts of the sampling head 1 can be disassembled to take a sample. This sampling method further improves the integrity of the sample structure.

[0051] This application provides a preferred embodiment, as shown in Figures 3 and 4. Both the first sampling head 1-3 and the second sampling head 1-4 are tile-shaped structures. The first sampling head 1-3 is provided with a first protrusion 1-3-1 and a first groove 1-3-2 on both sides along the axial direction. The second sampling head 1-4 is provided with a second protrusion 1-4-1 and a second groove 1-4-2 on both sides along the axial direction. The second groove 1-4-2 cooperates with the first protrusion 1-3-1, and the second protrusion 1-4-1 cooperates with the first groove 1-3-2, so that the first sampling head 1-3 and the second sampling head 1-4 are spliced ​​together to form a cylindrical structure. The outer diameter of the cylindrical structure matches the inner diameter of the closed section sampling head 1-1 and the open section sampling head 1-2. In this embodiment, the first sampling head 1-3 and the second sampling head 1-4 are both tile-shaped structures, and the first sampling head 1-3 and the second sampling head 1-4 are engaged and connected by protrusions and grooves to form a cylindrical structure; secondly, the outer diameter of the cylindrical structure is matched with the inner diameter of the closed section sampling head 1-1 and the open section sampling head 1-2, so as to ensure that the upper end of the cylindrical structure can be fitted into the inner cavity of the lower end of the closed section sampling head 1-1, and the lower end of the cylindrical structure can be fitted into the inner cavity of the upper end of the open section sampling head 1-2.

[0052] Furthermore, this application provides a preferred embodiment, wherein the two ends of the cylindrical structure are respectively provided with second external threads along the outer circumferential surface; as shown in FIG5, the end of the closed section sampling head 1-1 away from the closed surface is provided with a first internal thread 1-1-1 along the inner circumferential surface; as shown in FIG6, one end of the open section sampling head 1-2 is provided with a second internal thread 1-2-1 along the inner circumferential surface; one end of the cylindrical structure is connected to the end of the closed section sampling head 1-1 away from the closed surface through the first internal thread 1-1-1, and the other end of the cylindrical structure is connected to one end of the open section sampling head 1-2 through the second internal thread 1-2-1. Based on the previous embodiment, in this embodiment, the two ends of the cylindrical structure are respectively provided with second external threads along the outer circumference. At the same time, the lower end of the closed-section sampling head 1-1 is provided with a first internal thread 1-1-1 that matches the second external thread, and the upper end of the open-section sampling head 1-2 is provided with a second internal thread 1-2-1 that matches the second external thread. In use, the upper end of the cylindrical structure is threadedly connected and fixed to the lower end of the closed-section sampling head 1-1, and the lower end of the cylindrical structure is threadedly connected and fixed to the upper end of the open-section sampling head 1-2. The threaded connection allows for quick assembly of the sampling head 1 when underground sampling is required. At the same time, after the soil sample is taken into the inner cavity of the sampling head 1, it is easy to disassemble the sampling head 1 to quickly remove the soil sample and ensure the integrity of the soil sample structure. Furthermore, the sampling head 1 is designed as a detachable structure, which facilitates disassembly and storage of the sampling device after use.

[0053] Furthermore, this application provides a preferred embodiment, as shown in FIG6, wherein a sampling blade 1-2-2 is provided at the other end of the open-section sampling head 1-2. In this embodiment, the lower end of the open-section sampling head 1-2 is set as the sampling blade 1-2-2, which has a conical structure. When performing underground sampling, the sampling blade 1-2-2 is inserted into the soil, making the sampling process more labor-saving.

[0054] This application provides a preferred embodiment, as shown in Figures 7 and 8. The connecting nut 4-3 includes a nut segment 4-3-1 and an operating segment 4-3-2. The nut segment 4-3-1 is cylindrical, and its inner circumferential surface is provided with a third internal thread that matches the connecting bolt. The operating segment 4-3-2 is hexagonal prism-shaped, and a second through hole 4-3-3 is axially formed at the center of the operating segment 4-3-2. The inner cavity of the nut segment 4-3-1 communicates with the second through hole 4-3-3, allowing the connecting end 2-1 of the push rod 2 to pass through. Furthermore, the nut segment 4-3-1 and the operating segment 4-3-2 are integrally formed, and the connecting nut 4-3 moves on the push rod 2. In this embodiment, the connecting nut 4-3 is designed as a two-part structure, consisting of a nut segment 4-3-1 and an operating segment 4-3-2. The nut segment 4-3-1 and the operating segment 4-3-2 are integrally formed. The nut segment 4-3-1 is cylindrical, with a third internal thread matching the connecting bolt on its inner circumference. The operating segment 4-3-2 is hexagonal prism, with a second through hole 4-3-3 axially formed at its center, which communicates with the inner cavity of the nut segment 4-3-1. When the sampling device of this application is needed for underground sampling, the connecting end 2-1 of the push rod 2 is passed through the inner cavity of the nut section 4-3-1 and the second through hole 4-3-3 in sequence, so that the connecting nut 4-3 moves downward along the push rod 2 to the closed surface of the sampling head 1. At the same time, the push rod 2 moves upward so that the first connecting bolt 4-1 passes through the first through hole 3 and forms a connecting bolt with the second connecting bolt 4-2. At this time, the connecting bolt formed by the first connecting bolt 4-1 and the second connecting bolt 4-2 is locked and fixed by the connecting nut 4-3 to carry out underground sampling. After the sampling is completed, the connecting nut 4-3 is loosened to separate the sampling head 1 and the push rod 2, so that the push rod 2 can be pushed to take out the soil sample.

[0055] This application provides a preferred embodiment, as shown in FIG9. The auxiliary structure includes a limiting sleeve 5 and a limiting screw 6. One end of the limiting sleeve 5 is provided with a limiting hole. One end of the limiting screw 6 is provided with a limiting protrusion 6-1, and the other end of the limiting screw 6 is provided with a third external thread 6-2. The end of the limiting screw 6 near the third external thread 6-2 passes through the limiting hole and is limited by the limiting protrusion 6-1. In this embodiment, the specific structure of the auxiliary structure is further defined. The auxiliary structure includes a limiting sleeve 5 and a limiting screw 6. One end of the limiting screw 6 is fitted inside the limiting hole at one end of the limiting sleeve 5 and is limited by the limiting protrusion 6-1 to prevent the limiting screw 6 from falling out of the limiting hole of the limiting sleeve 5 and to bring out the sampling head 1 when the auxiliary structure is lifted. When in use, the limiting sleeve 5 reciprocates on the limiting screw 6, striking the sampling head 1 below to take a sample.

[0056] Furthermore, this application provides a preferred embodiment, wherein the auxiliary structure further includes a plurality of extension rods, each extension rod having a first stud at one end and a first threaded hole mates with the first stud at the other end along the axial direction; the other end of the limiting sleeve 5 has a second stud, which mates with the first threaded hole, and the other end of the limiting sleeve 5 is threadedly connected to one of the extension rods. Based on the previous embodiment, this embodiment further specifies that the auxiliary structure also includes a plurality of extension rods, each extension rod having a first stud at one end and a first threaded hole mates with the first stud at the other end; the other end of the limiting sleeve 5 also has a second stud, which mates with the first threaded hole, i.e., the second stud and the first stud have completely identical structures; the first threaded hole end of any one of the plurality of extension rods is mateably connected to the second stud on the limiting sleeve 5, and other extension rods are threadedly installed on the other end of the already connected and fixed extension rods as needed. When in use, the operator holds the extension rod and hammers it vertically downwards, so that the hammering force of the auxiliary structure acts directly on the sampling structure, allowing the sampling structure to be smoothly inserted into the soil to complete the sampling operation.

[0057] Furthermore, this application provides a preferred embodiment, as shown in Figures 10 and 11. One end of the connecting rod 7 has a second threaded hole 7-1 that mates with the first external thread 2-4, and the other end of the connecting rod 7 has a third threaded hole 7-2 that mates with the third external thread 6-2. One end of the connecting rod 7 is threadedly connected to the connecting end 2-1 of the push rod 2, and the other end of the connecting rod 7 is threadedly connected to the other end of the limiting screw 6. In this embodiment, the connecting structure between the auxiliary structure and the sampling structure, namely the connecting rod 7, is further defined. The upper end of the connecting rod 7 is provided with a third threaded hole 7-2, and the lower end is provided with a second threaded hole 7-1. The upper end of the connecting rod 7 is fixedly connected to the lower end of the limiting screw 6 by threads, and the lower end of the connecting rod 7 is fixedly connected to the connecting end 2-1 of the push rod 2 by threads.

[0058] When the portable sampling device of this application needs to take samples, the various components are first assembled. Specifically, the first sampling head 1-3 and the second sampling head 1-4 are first snapped together to form a cylindrical structure. Then, the closed section sampling head 1-1 and the open section sampling head 1-2 are respectively threaded onto the two ends of the cylindrical structure to form a complete sampling head 1. Then, the connecting end 2-1 of the push rod 2 is inserted from the open end of the sampling head 1, so that the connecting end 2-1 passes through the first through hole 3 on the sampling head 1, until the first connecting bolt 4-1 is completely inside the first through hole 3 and is connected to the first sampling head 1. Two connecting bolts 4-2 are fitted together to form a connecting bolt. Finally, the connecting nut 4-3, which is sleeved on the connecting end 2-1, is moved down to the connecting bolt. The connecting nut 4-3 is tightened and fixed to the connecting bolt by applying a wrench to the operating section 4-3-2. Then, the lower end of the connecting rod 7 is threadedly fixed to the connecting end 2-1 of the push rod 2, and the upper end of the connecting rod 7 is threadedly fixed to the lower end of the limiting screw 6 in the auxiliary structure. Finally, several extension rods are installed on the limiting sleeve 5 at the upper end of the auxiliary structure according to actual needs. After installation, the operator holds the extension rod and hammers it vertically downwards, applying the hammering force to the connecting nut 4-3 of the sampling structure. The sampling blade 1-2-2 at the bottom of the sampling head directly acts on the soil to insert downwards until the soil sample is extracted. Then, the sampling head 1 in the portable sampling device of this application can be disassembled to extract the soil sample, or the pushing rod 2 can be pushed to push the soil sample out of the inner cavity of the sampling head 1. Both methods can obtain a complete soil sample structure to ensure the accuracy of subsequent testing and analysis, while improving sampling efficiency.

[0059] When not in use, the portable sampling device of this application can be disassembled in the reverse direction of the above installation, so as to facilitate the storage and transportation of the sampling device. At the same time, when a certain part is worn or damaged, it is easy to replace it, thereby improving the service life of the sampling device and giving it a wide range of application prospects.

[0060] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A portable sampling device, characterized in that, The sampler includes a sampling structure and an auxiliary structure, which are fixedly connected by a connecting rod (7). The sampling structure includes a sampling head (1) and a pushing rod (2). The sampling head (1) is cylindrical, with one end open and the other end closed. A first through hole (3) is provided on the closed surface of the sampling head (1). The pushing rod (2) includes a pushing end (2-2) and a connecting end (2-1). The pushing end (2-2) is provided with a pushing disk (2-3) that matches the inner cavity of the sampling head (1). The connecting end (2-1) is provided with a first external thread (2-4) along its circumferential surface. The pushing end (2-2) passes through the first through hole (3) and is fitted inside the sampling head (1). The pushing disk (2-3) is located inside the inner cavity of the sampling head (1). It can reciprocate along the inner cavity; the push rod (2) and the sampling head (1) are movably connected by a bolt and nut structure; the bolt and nut structure includes a first connecting bolt (4-1) set on the push end (2-2) near the top surface of the push disk (2-3) and a second connecting bolt (4-2) set on the closed surface near the first through hole (3), and a connecting nut (4-3) set on the connecting end (2-1); the first connecting bolt (4-1) and the second connecting bolt (4-2) are both semi-circular bolts; when the first connecting bolt (4-1) moves to the first through hole (3), it forms a connecting bolt with the second connecting bolt (4-2), and the connecting bolt is tightened or loosened by the connecting nut (4-3).

2. The portable sampling device according to claim 1, characterized in that, The sampling head (1) includes a closed-section sampling head (1-1) and an open-section sampling head (1-2), as well as a first sampling head (1-3) and a second sampling head (1-4) fixedly installed between the closed-section sampling head (1-1) and the open-section sampling head (1-2).

3. The portable sampling device according to claim 2, characterized in that, Both the first sampling head (1-3) and the second sampling head (1-4) are tile-shaped structures. The first sampling head (1-3) is provided with a first protrusion (1-3-1) and a first groove (1-3-2) on both sides along the axial direction. The second sampling head (1-4) is provided with a second protrusion (1-4-1) and a second groove (1-4-2) on both sides along the axial direction. The second groove (1-4-2) cooperates with the first protrusion (1-3-1), and the second protrusion (1-4-1) cooperates with the first groove (1-3-2) so that the first sampling head (1-3) and the second sampling head (1-4) are spliced ​​together to form a cylindrical structure. The outer diameter of the cylindrical structure matches the inner diameter of the closed section sampling head (1-1) and the open section sampling head (1-2).

4. The portable sampling device according to claim 3, characterized in that, The cylindrical structure has a second external thread at both ends along its outer circumferential surface. The end of the closed-section sampling head (1-1) away from the closed surface has a first internal thread (1-1-1) along its inner circumferential surface. The end of the open-section sampling head (1-2) has a second internal thread (1-2-1) along its inner circumferential surface. One end of the cylindrical structure is connected to the end of the closed-section sampling head (1-1) away from the closed surface through the first internal thread (1-1-1). The other end of the cylindrical structure is connected to the end of the open-section sampling head (1-2) through the second internal thread (1-2-1).

5. The portable sampling device according to claim 4, characterized in that, The other end of the sampling head (1-2) in the open section is provided with a sampling blade (1-2-2).

6. The portable sampling device according to any one of claims 1-5, characterized in that, The connecting nut (4-3) includes a nut section (4-3-1) and an operating section (4-3-2); the nut section (4-3-1) is cylindrical, and the inner circumferential surface of the nut section (4-3-1) is provided with a third internal thread that matches the connecting bolt; the operating section (4-3-2) is hexagonal prism, and a second through hole (4-3-3) is provided axially at the center of the operating section (4-3-2); the inner cavity of the nut section (4-3-1) communicates with the second through hole (4-3-3) so that the connecting end (2-1) of the push rod (2) can pass through.

7. The portable sampling device according to claim 6, characterized in that, The nut section (4-3-1) and the operating section (4-3-2) are integrally formed structures, and the connecting nut (4-3) moves on the push rod (2).

8. The portable sampling device according to any one of claims 1-5, characterized in that, The auxiliary structure includes a limiting sleeve (5) and a limiting screw (6); one end of the limiting sleeve (5) is provided with a limiting hole; one end of the limiting screw (6) is provided with a limiting protrusion (6-1), and the other end of the limiting screw (6) is provided with a third external thread (6-2); the end of the limiting screw (6) near the third external thread (6-2) passes through the limiting hole, and the limiting protrusion (6-1) limits the limiting screw (6).

9. The portable sampling device according to claim 8, characterized in that, The auxiliary structure also includes several extension rods, each of which has a first stud at one end and a first threaded hole that mates with the first stud at the other end along the axial direction; the other end of the limiting sleeve (5) is provided with a second stud, which mates with the first threaded hole, and the other end of the limiting sleeve (5) is connected to one of the extension rods by a thread.

10. The portable sampling device according to claim 9, characterized in that, One end of the connecting rod (7) has a second threaded hole (7-1) that mates with the first external thread (2-4), and the other end of the connecting rod (7) has a third threaded hole (7-2) that mates with the third external thread (6-2). One end of the connecting rod (7) is threadedly connected to the connecting end (2-1) of the push rod (2), and the other end of the connecting rod (7) is threadedly connected to the other end of the limiting screw (6).

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