CN211262790U - Soil sampler that interior rotation formula moves back soil - Google Patents

Abstract

The utility model discloses an internal rotation type soil sampler that moves back soil, which comprises a drill rod, a handle, a drill cylinder, a lifting handle, an inner ring body, a sphere, a positioning part, two springs and two steel ropes, wherein the drill cylinder comprises a soil sampling port and a connecting end surface provided with an arc-shaped limiting area, the drill rod is respectively connected with the handle and the connecting end surface, and the lifting handle is fixed on the upper part of the drill rod; the drilling barrel is provided with two arc-shaped rails, the inner ring body is provided with two limiting channels and two fixing columns, the inner ring body is movably arranged in the drilling barrel, and the two fixing columns respectively extend out of the arc-shaped limiting areas; the ball body is arranged between the limiting channels through limiting columns, and the limiting columns are respectively positioned in the arc-shaped tracks; the positioning parts are symmetrically fixed between the two arc-shaped rails, and the two springs are respectively fixed between the positioning parts and the fixed columns; one end of each of the two steel ropes is fixed on the inner ring body, and the other end of each of the two steel ropes penetrates through the spring and the positioning part in sequence and then is fixedly connected with the lifting handle. The utility model discloses can the single-hand control soil body discharge after getting soil, whole easy operation is convenient.

Description

Soil sampler that interior rotation formula moves back soil

Technical Field

The utility model relates to a soil sample acquisition instrument technical field especially relates to an interior formula of revolving moves back geotome of soil.

Background

The soil collection and analysis have important significance, for example, agricultural production, soil cultivation, pollution treatment, plant root system research and the like are researched, and through the analysis of the collected soil, extremely important guidelines can be provided for agricultural production, soil cultivation, pollution treatment, plant root system research and the like, and particularly, the crop yield can be improved, the environmental pollution can be prevented and the like.

At present, the types of soil collecting tools are various, and common soil collecting tools mainly comprise an undisturbed soil sampler and a soil sampler with a soil pushing block. The undisturbed soil sampler is structurally characterized in that a hollow drill bit is arranged below the T-shaped steel frame, the hollow drill bit is inserted into soil to rotationally take the soil during use, then a container for containing the soil is arranged below the drill bit, when the undisturbed soil sampler is operated by one person, the drill bit of the undisturbed soil sampler is held by one hand, and a screwdriver or other tools are inserted from a gap on the outer wall of the drill bit by the other hand to scrape soil in the drill bit into the container. The structure of the soil sampler with the soil pushing block is that the undisturbed soil sampler extends further, specifically, the middle of a T-shaped rod is hollow, a small T-shaped rod extends from the upper part of the T-shaped rod, and the soil pushing block positioned in a drill bit is connected below the small T-shaped rod; after soil is taken, the small T-shaped rod is pushed downwards to drive the soil pushing block to push out the soil in the drill bit.

However, the two soil sampling devices still have defects in the actual use process, for an undisturbed soil sampling device, the inner wall of the drill bit needs to be scraped clean by a tool every time one soil sample is sampled, time and labor are wasted, the large soil sampling quantity cannot be met, and operators are often scratched and stabbed by sharp drill bits due to frequent contact of the operators with the drill bits. And for the geotome of area push away the soil piece, the process that the soil got into the drill bit is a compressed process in the process of getting soil, and this can lead to soil unit weight grow, and soil and drill bit inner wall combine very closely. Meanwhile, in the soil retreating process, after the soil body is compressed into the drill barrel, the pushing force of the soil pushing block is applied to the upper surface of the soil column in the drill barrel and is mutually opposite to the friction force between the soil body and the inner wall of the drill barrel, so that the soil body in the drill barrel is further compressed, the soil body and the inner wall are bonded more tightly, and the soil body can be discharged only by great force. Moreover, when the soil-containing container is usually placed below the drill bit during soil withdrawal, the drill bit needs to be emptied and taken up to prevent the container from being punctured by the drill bit, when an operator grasps the T-shaped handle above the drill bit with one hand and pushes the soil-shifting block from the upper side with the other hand, the pushing process is blocked too much, the operator cannot grasp the soil-shifting block with one hand stably, the soil-shifting device is easy to turn, incline and take unstably, and the soil-shifting device is not convenient to operate by one person.

In addition, taking an artificial rainfall test for exploring the water and soil loss condition under different farming measures as an example, in a 1 × 2m community, soil samples with the depth of 0-25 cm are often taken by soil samplers from the upper part, the middle part and the lower part of the community before and after rainfall respectively, and in order to ensure the test precision, the soil samples with the depth of 0-25 cm are generally divided into five sections for measuring the water content. In the above experiment, one treatment was repeated at least three times, i.e., 90 soil samples were taken for each treatment. While one test tends to have more than three treatment controls, in some microtopography tests, even more than 10 treatments. Based on this, the existing soil sampler needs to be improved so as to be capable of taking soil more conveniently and rapidly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the above-mentioned problem that exists among the prior art, provide an interior rotation type moves back geotome of soil, the utility model discloses can the one-hand control soil body discharge after the geotome, whole easy operation is convenient, has simplified the process of fetching earth, has reduced the intensity of fetching earth.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides an interior rotation type moves back geotome of soil which characterized in that: the drilling device comprises a drilling rod, a handle, a drilling barrel, a lifting handle, an inner ring body, a ball body, a positioning part, two springs and two steel ropes, wherein the drilling barrel comprises a soil taking port and a connecting end face, arc-shaped limiting areas are symmetrically arranged on the connecting end face, the upper end and the lower end of the drilling rod are fixedly connected with the handle and the connecting end face respectively, and the lifting handle is fixed at the upper part of the drilling rod; the wall of the drilling barrel is provided with two symmetrical arc tracks along the axial lead direction, the inner ring body is provided with two symmetrical limiting channels and two fixing columns, the inner ring body is movably arranged in the drilling barrel, and the two fixing columns respectively extend out of the drilling barrel from the arc limiting areas; the ball body is provided with two symmetrical limiting columns, the ball body is movably arranged between the limiting channels through the limiting columns, and the two limiting columns are respectively positioned in the two arc-shaped tracks; the positioning parts are symmetrically fixed between the two arc-shaped rails, and the two springs are respectively fixed between the positioning parts and the fixed columns; one ends of the two steel ropes are symmetrically fixed on the inner ring body, and the other ends of the two steel ropes respectively penetrate through the spring and the positioning part in sequence and then are fixedly connected with the lifting handle.

The inner ring body comprises an upper ring, a lower ring and four connecting rods, the upper ring and the lower ring are respectively fixed at two ends of the four connecting rods, the fixing columns are symmetrically fixed on the upper ring, and the limiting channel is formed by combining the four connecting rods in pairs.

And the fixing column is fixedly connected with a limiting nut after extending out of the arc-shaped limiting area.

And after the steel rope penetrates through the positioning part, the steel rope firstly winds the drill rod for a plurality of circles and then is connected with the lifting handle.

And two ends of the spring are respectively connected with the positioning part and the fixing column in a welding manner.

The drill rod is welded and fixed in the middle of the connecting end face, and the welding position of the drill rod and the connecting end face is located between the arc limiting areas.

The positioning part is of an annular structure.

Adopt the utility model has the advantages of:

1. the utility model discloses set up the activity of interior ring body in boring a section of thick bamboo to the fixed column that will carry pull handle and interior ring body through the steel cable couples together, in this structure, because the steel cable passes earlier location portion again with carry pull handle fixed connection, consequently when carrying pull handle pulling steel cable, can follow the tangential direction of interior ring body and apply the pulling force to the interior ring body, can convert the axial tension of steel cable into radial pulling force promptly, thereby drive interior ring body at boring a section of thick bamboo internal rotation. And because the ball body is movably arranged between the limiting channel channels through the limiting columns, and the limiting columns are positioned in the arc-shaped track, when the inner ring body is driven to rotate by the lifting handle and the steel rope, the ball body moves from top to bottom along the arc-shaped track. The two springs are respectively fixed between the positioning part and the fixed column, so that the springs can generate a certain amount of compression when the lifting handle drives the inner ring body to rotate, and then the springs drive the inner ring body to reset when the lifting handle is loosened, and the ball body also resets. The utility model adopts the above structure's cooperation, after borrowing soil, as long as the single hand is pressed gently and is carried the handle, just can make the interior ring body boring a section of thick bamboo internal rotation, and then will peel off with the soil body that bores a section of thick bamboo inner wall in close contact with, the spheroid will downstream simultaneously to release the soil body. The whole soil taking process can control soil body discharge by one hand, the operation is simple and convenient, the soil taking process is simplified, and the soil taking strength is reduced.

2. The inner ring body in the utility model comprises an upper ring, a lower ring and four connecting rods, wherein the upper ring and the lower ring are respectively fixed at two ends of the four connecting rods, fixing columns are symmetrically fixed on the upper ring, and a limiting channel is formed by combining the four connecting rods two by two; the inner ring body structure can be tightly attached to the inner wall of the drill cylinder, the self surface area of the inner ring body is small, the volume is small, the space occupied in the drill cylinder is small, and the soil taking requirement is not influenced. And in the rotating process of the inner ring body, the curved surface formed by the rotating track of the inner ring body accounts for the specific gravity of the surface area of the inner wall of the drilling barrel, so that the soil adhered to the inner wall of the drilling barrel can be effectively stripped, and the soil body can be discharged by slightly pushing the ball body from the upper part.

3. The utility model discloses fixedly connected with stop nut behind the spacing district of arc is stretched out at the fixed column, makes the fixed column can only slide and can not deviate from the top cap along the spacing district of arc through stop nut.

4. The utility model discloses after passing location portion with the steel cable, make the steel cable wind earlier and be connected with carrying handle again after the drilling rod multiturn, this structure makes the drilling rod become the supporter of steel cable, is favorable to doing all can along the stable transmission of steel cable. In addition, the drill rod is thinner than the drill cylinder, and the structure that the steel rope is wound on the drill rod can also ensure that the steel rope does not disturb the soil taking process after the soil drill penetrates into the soil body.

5. The utility model discloses the both ends of well spring respectively with location portion and fixed column welded connection, this structure is favorable to guaranteeing the stable of interior ring body and resets.

6. The utility model discloses with drilling rod welded fastening at the middle part of connecting the terminal surface, and the drilling rod is located between the spacing district of arc with the welding department of being connected the terminal surface.

7. The utility model discloses establish location portion into loop configuration, be favorable to the stable transmission of power for adopt less pulling force can control the internal ring body and rotate.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at I;

fig. 3 is a schematic perspective view of the present invention;

FIG. 4 is a schematic view of the three-dimensional structure of the joint between the drill rod and the drill barrel of the present invention;

FIG. 5 is a schematic perspective view of a middle drill barrel according to the present invention;

fig. 6 is a schematic perspective view of the middle-inner ring body of the present invention;

labeled as: 1. the device comprises a drill rod, 2, a handle, 3, a drill barrel, 4, a lifting handle, 5, a spring, 6, an inner ring body, 7, a ball body, 8, a positioning part, 9, a steel rope, 10, an arc-shaped track, 11, a limiting channel, 12, a limiting column, 13, a connecting end face, 14, an upper ring, 15, a lower ring, 16, a connecting rod, 17, a fixing column, 18, a soil taking port, 19 and an arc-shaped limiting area.

Detailed Description

The utility model discloses an interior rotation type moves back geotome of soil, including drilling rod 1, handle 2, bore a section of thick bamboo 3, carry handle 4, interior annular 6, spheroid 7, location portion 8, two springs 5 and two steel cables 9, the concrete constitution of each part, connection and position relation as follows:

the drill barrel 3 comprises a soil taking port 18 and a connecting end face 13, arc-shaped limiting areas 19 are symmetrically arranged on the connecting end face 13, the upper end and the lower end of the drill rod 1 are fixedly connected with the handle 2 and the connecting end face 13 respectively, and the lifting handle 4 is fixed on the upper portion of the drill rod 1. Specifically, the drill rod 1 is welded and fixed in the middle of the connecting end face 13, and the welding position of the drill rod 1 and the connecting end face 13 is located between the arc-shaped limiting areas 19.

Two symmetrical arc-shaped rails 10 are arranged on the wall of the drilling barrel 3 along the axial lead direction, and the two arc-shaped rails 10 are respectively positioned at two sides of the axial lead of the drilling barrel 3. For the preparation, the drill cylinder 3 is preferably welded by two symmetrical half cylinders, and an arc-shaped structure is designed on the two half cylinders in advance, so that the arc-shaped track 10 can be formed after welding. Further, the curved track 10 can also be made by, for example: firstly, drawing a vertical short line on the outer surface of the upper part of one side of the drill cylinder 3, then drawing a vertical short line on the outer surface of the lower part of the drill cylinder 3, wherein the vertical short line of the lower part is positioned on one side of the vertical short line of the upper part, namely the vertical short line of the upper part and the vertical short line of the lower part are not on the same straight line, then connecting two ends of the two vertical short lines of the upper part by using two arc lines, and finally hollowing out the line drawing area part by using a tool, thus obtaining the arc-shaped track 10.

The inner ring body 6 is provided with two symmetrical limiting channels 11 and two fixing columns 17, the inner ring body 6 is movably arranged in the drilling barrel 3, and the two fixing columns 17 respectively extend out of the drilling barrel 3 from the arc-shaped limiting area 19. Specifically, the inner ring 6 comprises an upper ring 14, a lower ring 15 and four connecting rods 16, the upper ring 14 and the lower ring 15 are respectively fixed at two ends of the four connecting rods 16, the limiting channel 11 is formed by combining the four connecting rods 16 in pairs, fixing columns 17 are symmetrically fixed on the upper ring 14, and the fixing columns 17 are fixedly connected with limiting nuts after extending out of arc limiting areas 19 so as to ensure stable rotation of the drill barrel 3.

The sphere 7 is preferably a plastic sphere, two symmetrical limiting columns 12 are arranged on the sphere 7, the sphere 7 is movably arranged between the limiting channel 11 through the limiting columns 12, and the two limiting columns 12 are respectively positioned in the two arc-shaped tracks 10. Specifically, the ball 7 can move up and down along the arc-shaped track 10 through the limit post 12.

The positioning portion 8 is of an annular structure, the positioning portion 8 is symmetrically fixed between the two arc-shaped rails 10, the two springs 5 are respectively fixed between the positioning portion 8 and the fixing column 17, and preferably, two ends of each spring 5 are respectively connected with the positioning portion 8 and the fixing column 17 in a welding mode.

One ends of the two steel ropes 9 are symmetrically fixed on the inner ring body 6, and the other ends of the two steel ropes respectively penetrate through the spring 5 and the positioning part 8 in sequence and then are fixedly connected with the lifting handle 4. Furthermore, after the steel rope 9 passes through the positioning part 8, the steel rope firstly winds the drill rod 1 for a plurality of circles and then is connected with the lifting handle 4. The lifting handle 4 controls the inner ring body 6 to rotate in the drill barrel 3 through a steel rope 9, and the spring 5 is used for controlling the inner ring body 6 to reset.

The utility model discloses the fixed connection between each part preferably adopts welded fastening, for example, bores a section of thick bamboo 3 and can be formed by two half a section of thick bamboos welding, and interior ring 6 can be formed through the welding of connecting rod 16 by last ring 14 and lower ring 15, and connection terminal surface 13 can weld and be boring 3 tip, and location portion 8 can weld on connecting terminal surface 13 etc..

The utility model discloses in, carry handle 4 and choose ordinary bicycle brake lever for use, nevertheless the utility model discloses in need not adopt the design of the soft leather sheath of brake cable outside additional package one deck in the bicycle design with the steel cable 9 that carries handle 4 to be connected, but adopt two thin soft steel cables 9 of a handle entry end dress, this kind of structure is favorable to moving back soil process one-hand operation. The two steel cables 9 are used for uniformly and symmetrically transmitting the pressing force to the inner ring 6 so as to make the inner ring 6 stably rotate in the drill barrel 3. The grip distance between the handle 2 and the carrying handle 4 is: the problems are demonstrated as follows: taking the diameter of the inner wall of the drill barrel 3 as an example, the rotating angle of the inner ring is less than 180 degrees, so the distance required for pulling the steel rope 9 is less than half of the circumference of the inner wall, namely less than 4.7 cm. The palm length of the adult male can reach 18cm, and the adult male can completely meet the grip distance requirement by combining the analysis of the common bicycle handle on the market.

The utility model discloses in, the upper end internal diameter of arc track 10 is great on boring a section of thick bamboo 3, and the lower extreme internal diameter slightly is greater than the external diameter of connecting spacing post 12 on spheroid 7. This design can make spheroid 7 have certain activity space on the drilling section of thick bamboo 3 upper portion to spheroid 7 is followed the rotation earlier and is not fallen when being convenient for inner ring 6 is rotatory, and spheroid 7 falls and the rotatory process of peeling off soil of inner ring 6 is asynchronous promptly, makes the connecting rod 16 of inner ring 6 peel off soil earlier to a certain extent and spheroid 7 pushes down again. The reason is as follows: the soil retreating process of the soil pushing type soil sampler is that after soil is compressed into the drill barrel 3, the thrust of the soil pushing block is applied to the upper surface of the soil column in the drill barrel 3 and is mutually opposite to the friction force between the soil and the inner wall of the drill barrel 3, so that the soil in the drill barrel 3 is further compressed, the soil and the inner wall are more tightly bonded, and the soil can be discharged by the common soil pushing type soil sampler with a large force. And the utility model discloses a rotatory soil body of destroying of inner ring body 6 and the 3 inner walls bonding faces of bore a section of thick bamboo, soil can be to not the extension of stress surface, at this time at first keeps spheroid 7 not whereabouts, gives the certain extension space of the soil body, waits that spheroid 7 pushes down after the soil body certain degree is loose, can release bore a section of thick bamboo 3 with the soil body smoothly with minimum power.

The utility model discloses in, spheroid 7 is preferably the hollow spheroid 7 of plastics, and spacing post 12 on the spheroid 7 is little metal pole, and after moving back the soil process and accomplishing, spheroid 7 need rise to the upper end of boring a section of thick bamboo 3, and this structure can be under the condition of guaranteeing to use the durability, alleviates the weight of spheroid 7 and spacing post 12 as far as to reduce the thrust that requires 5 resilience of spring, and then chooseing for use littleer spring 5, make move back soil and draw handle the time minimum hard.

The utility model discloses in, spring 5 installs at the connection terminal surface 13 of boring a section of thick bamboo 3, has certain precompression volume after the installation of spring 5 for the pulling force of spring 5 when placing and reaching maximum length between location portion 8 and fixed column 17 can promote fixed column 17 and slide in the top cap fretwork. And the spring 5 can be replaced by unfastening the connection between the steel rope 9 and the fixed column 17, so that the spring 5 is prevented from weakening the elasticity after being used for a long time and being incapable of rebounding completely.

The utility model discloses in, arc track 10's length is the 3 internal diameters of a drill section of thick bamboo of triple, and the length of spacing channel 11 equals arc track 10's length. The thickness of the upper ring 14 and the lower ring 15 is as thin as possible, occupying as little soil space as possible. The outer diameter of the drill rod 1 is smaller than the outer diameter of the drill barrel 3 minus the outer diameters of the two springs 5, the length can be adjusted by adopting a common sectional screw design on the market according to the soil taking depth, and meanwhile, the steel ropes 9 are attached to the drill rod 1, so that the drill rods 1 with different lengths are required to be provided with the steel ropes 9 with different lengths. The inner diameter and length of the drill barrel 3 can be 2.5-3.5cm and 11-13cm respectively. The outer diameter of the inner ring body 6 is slightly smaller than the inner diameter of the drill barrel 3, and the length of the inner ring body is slightly smaller than the length of the drill barrel 3. The spring coefficient K of the spring 5 is about 0.4N/mm, when the inner diameter of the drill barrel 3 is 3cm and the rotation angle of the inner ring is 120 degrees, the compression distance of the spring 5 is less than 310mm, and when the spring 5 is compressed to the limit, an elastic force less than 124N is generated. The grip strength of a common adult man is about 500N generally, and at the moment, the elastic force can not generate excessive resistance in the soil discharging process under the condition that the inner ring can be ensured to rebound smoothly.

According to GB/T20118-.

The utility model discloses a specific structure and specific parameter can make the soil body in the drill barrel 3 drop fast after the borrowing to make the borrowing simple and convenient more.

The utility model discloses an implement the principle and do:

a single person inserts the drill barrel 3 into soil through the handle 2, presses down and rotates to get soil, and after the soil is got, the drill barrel 3 is placed above a soil body collection container. Then the lifting handle 4 is pressed by one hand, the lifting handle 4 applies upward lifting force to the steel rope 9, after the steel rope 9 is stressed, under the action of the positioning part 8, the inner ring body 6 is applied with pulling force from the tangential direction of the inner ring body 6, the inner ring body 6 is driven to rotate in the drill barrel 3, and therefore soil bodies which are in close contact with the inner wall of the drill barrel 3 are peeled. The ball 7 will then move from top to bottom along the curved track 10 pushing the soil mass in the drum 3 out of the drum 3. When the lifting handle 4 is pressed to the maximum stroke, the spring 5 is compressed to the minimum, and the ball 7 is also positioned at the lowest part of the drill barrel 3, and the soil body is completely pushed out of the drill barrel 3. And (3) loosening the lifting handle 4, resetting the spring 5 to drive the inner ring body 6 to reset, and simultaneously returning the ball body 7 to the upper part of the drilling barrel 3 along the arc-shaped track 10, so that the next soil taking can be started after the soil taking is finished. The utility model discloses after fetching earth, as long as one hand presses gently and carries handle 4, just can make interior ring 6 at boring 3 internal rotations of a section of thick bamboo, and then will peel off with the soil body that bores 3 inner wall in close contact with, spheroid 7 will downstream simultaneously to release the soil body. The whole soil taking process can control soil body discharge by one hand, the soil taking process is simplified, and the soil taking strength is reduced.

Any feature disclosed in this specification may, unless stated otherwise, be replaced by alternative features serving the same, equivalent or similar purpose; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.

Claims (7)

1. The utility model provides an interior rotation type moves back geotome of soil which characterized in that: the drilling device comprises a drilling rod (1), a handle (2), a drilling barrel (3), a lifting handle (4), an inner ring body (6), a sphere (7), a positioning part (8), two springs (5) and two steel ropes (9), wherein the drilling barrel (3) comprises a soil taking port (18) and a connecting end surface (13), arc-shaped limiting regions (19) are symmetrically arranged on the connecting end surface (13), the upper end and the lower end of the drilling rod (1) are fixedly connected with the handle (2) and the connecting end surface (13) respectively, and the lifting handle (4) is fixed on the upper part of the drilling rod (1); two symmetrical arc-shaped rails (10) are arranged on the wall of the drilling barrel (3) along the axial lead direction, two symmetrical limiting channels (11) and two fixing columns (17) are arranged on the inner ring body (6), the inner ring body (6) is movably arranged in the drilling barrel (3), and the two fixing columns (17) respectively extend out of the drilling barrel (3) from the arc-shaped limiting area (19); the ball body (7) is provided with two symmetrical limiting columns (12), the ball body (7) is movably arranged between the limiting channel channels (11) through the limiting columns (12), and the two limiting columns (12) are respectively positioned in the two arc-shaped tracks (10); the positioning parts (8) are symmetrically fixed between the two arc-shaped rails (10), and the two springs (5) are respectively fixed between the positioning parts (8) and the fixing columns (17); one ends of the two steel ropes (9) are symmetrically fixed on the inner ring body (6), and the other ends of the two steel ropes respectively penetrate through the spring (5) and the positioning part (8) in sequence and then are fixedly connected with the lifting handle (4).

2. The soil sampler of claim 1, wherein: the inner ring body (6) comprises an upper ring (14), a lower ring (15) and four connecting rods (16), the upper ring (14) and the lower ring (15) are respectively fixed at two ends of the four connecting rods (16), fixing columns (17) are symmetrically fixed on the upper ring (14), and the limiting channel (11) is formed by combining the four connecting rods (16) in pairs.

3. The soil sampler of claim 1 or 2, wherein: the fixing column (17) is fixedly connected with a limiting nut after extending out of the arc-shaped limiting area (19).

4. The soil sampler of claim 1, wherein: the steel rope (9) penetrates through the positioning part (8), and then is wound around the drill rod (1) for a plurality of circles and then is connected with the lifting handle (4).

5. The soil sampler of claim 1, wherein: and two ends of the spring (5) are respectively connected with the positioning part (8) and the fixing column (17) in a welding manner.

6. The soil sampler of claim 1, wherein: the drill rod (1) is welded and fixed in the middle of the connecting end face (13), and the welding position of the drill rod (1) and the connecting end face (13) is located between the arc-shaped limiting areas (19).

7. The soil sampler of claim 1, wherein: the positioning part (8) is of an annular structure.

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