Undisturbed soil sampling device for collapsible loess stratum

Abstract

The utility model relates to an undisturbed soil sampling device for collapsible loess strata, which comprises a drill rod, a drill bit and a handle, the drill bit and the handle are respectively integrally formed at the upper end and the lower end of the drill rod, two sides of the lower end of the drill bit are inwards contracted towards the center to form an inclined plane, and two observation grooves extending upwards are arranged at the top end of the inclined plane. A transparent thin-wall sampling pipe for fixedly taking a soil sample is arranged in the drill bit cavity; the interior of the drill rod is hollow to form a rod cavity, a push rod is sleeved with the rod cavity, the upper end of the push rod penetrates out of the drill rod and then is provided with a hand wheel, and the lower end of the push rod extends into the drill bit and is connected with a cake-shaped push head used for integrally pushing out the sampling pipe. According to the undisturbed soil sampling device for the collapsible loess stratum, aiming at the soft characteristic of the collapsible loess stratum, the undisturbed soil sampling device extends into the loess stratum in a direct downward insertion manner, and a columnar undisturbed soil sample with depth and layering characteristics is acquired.

Description

Technical Field

[0001] This utility model relates to the field of soil sampling technology, specifically to an undisturbed soil sampling device for collapsible loess strata. Background Technology

[0002] Soil profile sampling refers to collecting soil samples from depth to analyze soil stratification and the properties of each layer. Currently, the main methods used for soil profile sampling in collapsible loess strata include spiral soil sampling drills, ring-cut bulk density soil sampling drills, and root drills or core drills used for plant sampling. However, the samples obtained by these sampling devices show significant shifts in the position of each layer and do not possess depth and stratification characteristics. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect that the samples collected by existing samplers applied to collapsible loess strata do not have depth and stratification characteristics, and to provide an undisturbed soil sampling device for collapsible loess strata. It is designed for the soft characteristics of collapsible loess strata, and extends into the soil strata by direct insertion to collect columnar undisturbed soil samples with depth and stratification characteristics.

[0004] The original soil sampling device for this collapsible loess stratum includes a drill rod, a drill bit, and a handle. The drill bit and handle are integrally formed at the upper and lower ends of the drill rod, respectively. The lower end of the drill bit has two sides that taper inward towards the center to form a slope, and two upward-extending observation grooves are opened at the top of the slope. A transparent thin-walled sampling tube for fixing the soil sample is provided inside the drill bit cavity. The drill rod is hollow inside to form a rod cavity, and a push rod is installed inside the rod cavity. The upper end of the push rod extends out of the drill rod and is equipped with a handwheel. The lower end of the push rod extends into the drill bit and is connected to a disc pusher for pushing out the sampling tube as a whole.

[0005] Specifically, a pair of positioning nuts are fixed inside the rod cavity, and a threaded section is provided on the push rod. The push rod is threaded to the two positioning nuts inside the rod cavity through the threaded section.

[0006] The drill pipe is optimized so that the upper end is provided with a hammering edge, which is integrally formed on the upper end of the drill pipe.

[0007] The optimized version has a pedal mechanism installed on the drill rod body. The pedal mechanism includes a ring sleeve, a pedal on one side of the ring sleeve, and a tightening bolt on the other side of the ring sleeve.

[0008] The optimized handle is equipped with a rubber sleeve.

[0009] This utility model discloses an undisturbed soil sampling device for collapsible loess strata, which overcomes the shortcomings of existing samplers applied to collapsible loess strata, which do not provide samples with depth and stratification characteristics. It takes advantage of the soft characteristics of collapsible loess strata, and directly inserts the sample into the soil strata to collect columnar undisturbed soil samples with depth and stratification characteristics. Attached Figure Description

[0010] The following description, in conjunction with the accompanying drawings, further illustrates the original soil sampling device for collapsible loess strata according to this utility model:

[0011] Figure 1 This is a three-dimensional structural diagram of the original soil sampling device for this collapsible loess stratum;

[0012] Figure 2 yes Figure 1 Exploded view;

[0013] Figure 3 yes Figure 1 Perspective view;

[0014] Figure 4 yes Figure 3 A magnified view of part A in the middle;

[0015] Figure 5 yes Figure 3 A magnified view of part B in the middle.

[0016] In the picture:

[0017] 1-Drill pipe; 11-Positioning nut; 12-Hammer edge; 101-Rod cavity;

[0018] 2-Drill bit; 21-Chamfer, 22-Observation slot;

[0019] 3-Handle; 31-Rubber sleeve;

[0020] 4-Sampling tube;

[0021] 5-Push rod; 51-Handwheel; 52-Disc pusher head; 53-Threading section;

[0022] 6-Pedal mechanism; 61-Ring sleeve, 62-Pedal, 63-Tightening bolt. Detailed Implementation

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0024] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The present invention will be further described below with specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0026] Implementation method 1: such as Figures 1 to 5 As shown, the original soil sampling device for this collapsible loess stratum includes a drill rod 1, a drill bit 2, and a handle 3. The drill bit 2 and the handle 3 are integrally formed at the upper and lower ends of the drill rod 1, respectively. The lower end of the drill bit 2 has two inclined surfaces 21 that taper inward towards the center, and two upward-extending observation grooves 22 are opened at the top of the inclined surfaces 21. A transparent thin-walled sampling tube 4 for fixing the soil sample is provided inside the drill bit 2 cavity. The drill rod 1 has a hollow interior forming a rod cavity 101, and a push rod 5 is fitted inside the rod cavity 101. The upper end of the push rod 5 extends out of the drill rod 1 and is equipped with a handwheel 51. The lower end of the push rod 5 extends into the drill bit 2 and is connected to a disc pusher 52 for pushing out the sampling tube 4 as a whole. A pair of positioning nuts 11 are fixed inside the rod cavity 101. The push rod 5 has a threaded section 53, and the push rod 5 is threaded to the two positioning nuts 11 inside the rod cavity 101 through the threaded section 53. The circular pusher head is controlled by rotating the handwheel, stably pushing out the columnar soil sample and / or sampling tube in a vertical direction. The handle 3 is equipped with a rubber sleeve 31 to facilitate the application of force by hand when twisting and inserting.

[0027] Implementation Method 2: The undisturbed soil sampling device for this collapsible loess stratum has a hammering edge 12 at the upper end of the drill rod 1, which is integrally formed on the upper end of the drill rod 1. When the soil is too hard, the drill bit is driven downwards into the coating by hammering the drill rod downwards. The remaining structure and components are as described in Implementation Method 1 and will not be repeated.

[0028] Implementation Method 3: The original soil sampling device for collapsible loess strata has a pedal mechanism 6 installed on the drill rod 1. The pedal mechanism 6 includes a ring 61, a pedal 62 on one side of the ring 61, and a tightening bolt 63 on the other side of the ring. It is used in cases of excessively hard soil to assist the drill bit in extending downwards by stepping on it. The remaining structures and components are as described in Implementation Method 1 and will not be repeated.

[0029] In use: Place the device at the sampling location, rotate the handwheel in the reverse direction to rotate the disc pusher to the top of the drill bit, insert the sampling tube, and twist the handle to vertically insert the drill bit to a certain depth. After the soil layer is compacted, continue to penetrate to the required sampling depth by stepping or hammering. Then rotate the drill bit one revolution and twist it outward to pull it out. After preliminary observation of the soil layer sampling through the observation slot, rotate the handwheel in the forward direction to insert the columnar soil sample or sampling tube into the drill bit, thus completing the sampling.

[0030] This utility model discloses an undisturbed soil sampling device for collapsible loess strata, which overcomes the shortcomings of existing samplers applied to collapsible loess strata, which do not provide samples with depth and stratification characteristics. It takes advantage of the soft characteristics of collapsible loess strata, and directly inserts the sample into the soil strata to collect columnar undisturbed soil samples with depth and stratification characteristics.

[0031] The above description illustrates the main features, basic principles, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments or examples described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments or examples should be considered exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An undisturbed soil sampling device for collapsible loess strata, characterized in that: The system includes a drill rod (1), a drill bit (2), and a handle (3), wherein the drill bit (2) and the handle (3) are integrally formed at the upper and lower ends of the drill rod (1), respectively. The lower end of the drill bit (2) has two sides that taper inward toward the center to form an inclined surface (21), and two upward-extending observation grooves (22) are opened at the top of the inclined surface (21). The drill bit (2) cavity is equipped with a transparent thin-walled sampling tube (4) for fixing the soil sample taken in. The drill rod (1) is hollow inside to form a rod cavity (101), and a push rod (5) is fitted inside the rod cavity (101). The upper end of the push rod (5) extends out of the drill rod (1) and is fitted with a handwheel (51). The lower end of the push rod (5) extends into the drill bit (2) and is connected to a disc pusher (52) for pushing out the sampling tube (4) as a whole.

2. The undisturbed soil sampling device for collapsible loess strata according to claim 1, characterized in that: A pair of positioning nuts (11) are fixed inside the rod cavity (101). A threaded section (53) is provided on the push rod (5). The push rod (5) is threaded to the two positioning nuts (11) inside the rod cavity (101) through the threaded section (53).

3. The undisturbed soil sampling device for collapsible loess strata according to claim 2, characterized in that: The upper end of the drill rod (1) is provided with a hammering edge (12), which is integrally formed on the upper end of the drill rod (1).

4. The undisturbed soil sampling device for collapsible loess strata according to claim 3, characterized in that: The drill rod (1) is equipped with a pedal mechanism (6), which includes a ring sleeve (61), a pedal (62) on one side of the ring sleeve (61), and a tightening bolt (63) on the other side of the ring sleeve.

5. The undisturbed soil sampling device for collapsible loess strata according to claim 4, characterized in that: The handle (3) is provided with a rubber sleeve (31).

Images