CN219391382U - Agricultural soil sampler - Google Patents

Abstract

The utility model discloses an agricultural soil sampler, which comprises a sampling cylinder, a movable column and a telescopic rod assembly, wherein the movable column is movably arranged in an inner cavity of the sampling cylinder; the telescopic rod assembly is arranged on the outer side of the sampling cylinder, the telescopic rod assembly is positioned between any two adjacent operating handles of the sampling cylinder, and the distance between the telescopic rod assembly and the sampling cylinder is smaller than the minimum distance between the operating handles and the sampling cylinder; the top of the telescopic rod component is connected with the movable rod through the top opening of the sampling cylinder; this sample thief is through setting up the telescopic link subassembly that can link to open and close the sampling mouth in the sampling tube outside to set the distance between this telescopic link subassembly and the sampling tube to be less than the minimum distance between control handle and the sampling tube, make when carrying out the sampling operation, reach the purpose that the telescopic link subassembly does not interfere the operation of researcher, and then reach convenient operation's purpose, simultaneously, can also play the effect that reduces the structure space of sample thief, improve portability.

Description

Agricultural soil sampler

Technical Field

The utility model relates to the technical field of soil sampling equipment, in particular to an agricultural soil sampler.

Background

In the agricultural field, sampling analysis of agricultural soil is a research foundation for researching soil physical and chemical properties, nutrient information, organic matter pollution degree and other soil information. The method is used for carrying out physicochemical detection on soil samples with different depths under the ground surface, and has very important basic research significance.

In general agricultural scientific research, a manual soil sampling device is often used in consideration of cost and portability. When the earth surface soil is sampled, the most common soil sampling device is a shovel, and the device is simple in structure and convenient to carry. However, when soil with a certain depth (50 cm-80 cm) below the ground surface is sampled, a rotary drilling type sampling cylinder structure is generally adopted, so that physical strength is saved.

The current rotary drilling type sampling tube is simple in structure, and mostly consists of three parts, such as a handle, a supporting frame and a soil sampling drill bit, the soil sampling drill bit is rotated by manpower to be inserted into soil to a certain depth, then the drill bit is reversely screwed out, and soil reserved in a sampling cavity of the drill bit is sampling soil. Because the sampling depth is one of the important influencing factors of the soil physicochemical research, in order to improve the accuracy of analysis data, a depth calibration device is generally added on the existing rotary drilling type sampling cylinder, so that a researcher can achieve the purpose of depth-fixing sampling, and the accuracy of the soil physicochemical analysis is improved.

As disclosed in chinese patent application No. CN202120110394.1, a deep soil sampler for agricultural environment detection is provided with supporting strips marked with scales on two sides of a sampling cylinder, and the scale calibration structure can facilitate researchers to know and record the drilling depth in real time, but in the actual use process, when the researchers rotate drilling elements, the problem that the supporting strips interfere with arms easily occurs, so that the soil sampler with the depth feedback function has the problems of inconvenient operation and large structural space.

Disclosure of Invention

In order to overcome at least one of the defects described in the prior art, the utility model provides an agricultural soil sampler, so as to solve the following technical problems in the background art: the traditional soil sampler with the depth feedback function has the problems of inconvenient operation and large structural space.

The utility model adopts the technical proposal for solving the problems that:

an agricultural soil sampler, comprising:

the outer wall of the top is provided with a sampling cylinder with a plurality of operating levers, the top end of the sampling cylinder is provided with an opening, the bottom end of the sampling cylinder is provided with a sampling port, and the sampling port is communicated with the inner cavity of the sampling cylinder;

the movable column can close or open the sampling port, and is movably arranged in the inner cavity of the sampling cylinder; and

the length of the telescopic rod assembly can be changed in a telescopic way along the axial direction of the sampling cylinder, the telescopic rod assembly is arranged on the outer side of the sampling cylinder, the remote end of the operating rod is provided with an operating handle, the telescopic rod assembly is positioned between any two adjacent operating handles, and the distance between the telescopic rod assembly and the sampling cylinder is smaller than the minimum distance between the operating handle and the sampling cylinder;

the top of the movable column is provided with a movable rod, and the top of the telescopic rod assembly is connected with the movable rod through the top end opening of the sampling tube.

According to the agricultural soil sampler disclosed by the embodiment, the telescopic rod assembly for connecting the movable column is arranged between any two operating handles, the distance between the telescopic rod assembly and the sampling cylinder is smaller than the minimum distance between the operating handles and the sampling cylinder, so that the telescopic rod assembly can be positioned on the inner side of the operating handles, arms and bodies of researchers can be positioned on the outer sides of the moving ranges of the operating handles when soil sampling operation is carried out, the researchers stand on the outer sides of the operating handles to hold the operating handles and rotate the operating handles when the sampling cylinder is rotated, the moving range of the operating handles is the moving range of the operating handles by the researchers, the distance between the telescopic rod assembly and the sampling cylinder is smaller than the minimum distance between the operating handles and the sampling cylinder, the moving range of the telescopic rod assembly following the sampling cylinder is smaller than the moving range of hands of the researchers, the researchers can be achieved, the purposes of convenient operation can be achieved, meanwhile, the distance between the telescopic rod assembly and the sampling cylinder is obviously reduced, and the portable soil sampler can be further reduced.

Further, the device also comprises a start-stop ring, wherein the start-stop ring is movably sleeved outside the sampling tube, and the bottom of the telescopic rod assembly is connected with the start-stop ring.

Further, a spiral sheet is arranged on the outer wall of the sampling tube, and the outer diameter of the spiral sheet is smaller than the inner diameter of the opening and closing ring.

Further, the telescopic rod assembly comprises a top rod, a middle pipe and a bottom pipe, wherein the middle pipe is slidably sleeved outside the top rod, and the bottom pipe is slidably sleeved outside the middle pipe.

Further, the telescopic rod assembly further comprises:

a first locker disposed between the middle tube and the ejector rod and configured to be able to restrict relative sliding between the middle tube and the ejector rod; and

and a second locker disposed between the bottom pipe and the middle pipe and configured to be capable of restricting relative sliding between the bottom pipe and the middle pipe.

Further, the first locking device comprises two first clamping plates which are hinged to the top of the middle pipe and are symmetrically arranged, the end parts of the first clamping plates are provided with first locking blocks with the shapes matched with the outer wall of the ejector rod, a first torsion spring is arranged between the first clamping plates and the middle pipe, and the first torsion spring provides elastic force for the first clamping plates so as to drive the first locking blocks to be abutted against the ejector rod.

Further, the second locking device comprises two second clamping plates which are hinged to the top of the bottom pipe and are symmetrically arranged, the end parts of the second clamping plates are provided with second locking blocks with shapes matched with the outer wall of the middle pipe, second torsion springs are arranged between the second clamping plates and the bottom pipe, and the second torsion springs provide elastic force for the second clamping plates so as to drive the second locking blocks to be abutted to the middle pipe.

Further, a top disc is arranged at the top of the movable rod, the top of the ejector rod is fixedly arranged on the top disc, and the bottom of the bottom pipe is fixedly arranged on the opening and closing ring; the ejector rod, the middle pipe and the bottom pipe are all arranged in parallel with the sampling cylinder.

Further, the agricultural soil sampler further comprises a direction stabilizing pipe fixedly arranged outside the sampling cylinder, the axis of the direction stabilizing pipe is parallel to the axis of the sampling cylinder, and the ejector rod is arranged in the direction stabilizing pipe in a sliding penetrating mode.

Further, the locking device can adopt an A-shaped structure and can also adopt other structural forms, for example, the first locking device comprises a locking ball head and a locking spring, a mounting cavity is formed in the outer wall of the ejector rod, the locking ball head is movably mounted in the mounting cavity, a plurality of first limiting holes matched with the locking ball head are formed in the middle pipe along the axial direction, and the part of the locking ball head protruding out of the outer wall of the ejector rod is configured to be capable of being located in the movement range of the first limiting holes.

Further, a steering column is arranged on the movable rod, and the shape of the steering column is matched with the inner cavity of the sampling cylinder; a top cover is arranged at the opening of the top of the sampling tube, a through hole is formed in the middle of the top cover, and the top of the movable rod penetrates through the through hole and is connected with the telescopic rod assembly; an opening and closing spring is arranged between the top cover and the steering column, and when the movable column is positioned at the bottom of the inner cavity of the sampling cylinder to close the sampling port, the opening and closing spring applies elastic acting force towards the movable column to the steering column.

In summary, the agricultural soil sampler provided by the utility model has the following technical effects:

1) According to the sampler, the telescopic rod assembly capable of opening and closing the sampling port in a linkage way is arranged on the outer side of the sampling cylinder, and the distance between the telescopic rod assembly and the sampling cylinder is smaller than the minimum distance between the operating handle and the sampling cylinder, so that the purpose that the telescopic rod assembly does not interfere with the operation of researchers during sampling operation is achieved, the purpose of convenient operation is achieved, meanwhile, the function of reducing the structural space of the sampler is achieved, and portability is improved;

2) The movable sleeve is arranged on the opening and closing ring outside the sampling cylinder, so that the friction blocking effect of the ground surface on the telescopic rod assembly can be further improved during sampling, and the opening and closing sensitivity of the movable column is improved;

3) The locking device in the telescopic rod assembly adopts a structure form of combining a clamping plate with the interaction of a torsion spring, so as to achieve the purpose of abutting and locking the ejector rod or the middle pipe and realize the purpose of locking the preset sampling depth;

4) The stable pipe can play the effect of promoting the structural stability of telescopic link subassembly and start the closed loop, in sampling process, can promote the rotatory synchronism between closed loop and the sampling tube to play the effect of guaranteeing the sensitivity of opening and close of movable column to the sampling mouth, and then improve the depthkeeping sampling accuracy of this sampler.

Drawings

Fig. 1 is a schematic perspective view of embodiment 1 of the present utility model;

fig. 2 is an internal structural schematic diagram of the overall structure in embodiment 1;

FIG. 3 is a schematic perspective view of the depth-adjustable structure;

FIG. 4 is a schematic view showing the internal structure of the embodiment 1 after the sampling port is opened under the ground;

FIG. 5 is a schematic view of the whole structure at a second view angle;

FIG. 6 is an enlarged schematic view of a portion A of FIG. 5;

FIG. 7 is a partially enlarged schematic illustration of portion B of FIG. 5;

FIG. 8 is a schematic diagram of a locking structure between a mandrel and a middle tube in embodiment 2;

fig. 9 is a schematic view showing the overall internal structure of the movable bar of embodiment 3 when a steering column is provided.

Wherein the reference numerals have the following meanings:

1. a sampling cylinder; 101. a sampling port; 102. a joystick; 103. a spiral sheet; 104. a manipulation knob; 105. a top cover; 2. a movable column; 201. a movable rod; 202. a top plate; 203. a steering column; 3. a telescoping rod assembly; 301. a push rod; 302. a middle tube; 303. a bottom tube; 4. opening a closed loop; 5. a first clamping plate; 501. a first lock block; 6. a first torsion spring; 7. a second clamping plate; 701. a second lock block; 8. a second torsion spring; 9. a directional stabilizing tube; 10. locking the ball head; 11. a locking spring; 12. installing an embedding cavity; 13. a first limiting hole; 14. the spring is opened and closed.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Example 1

Referring to fig. 1 to 6, the present embodiment discloses an agricultural soil sampler, which includes:

the top outer wall is provided with a sampling cylinder 1 with a plurality of control rods 102, the top end of the sampling cylinder 1 is provided with an opening, the bottom end of the sampling cylinder is provided with a sampling port 101, the sampling port 101 is communicated with the inner cavity of the sampling cylinder 1, and the sampling cylinder 101 is used for allowing soil to enter the inner cavity of the sampling cylinder 1;

the movable column 2 of the sampling port 101 can be closed or opened, the movable column 2 is movably arranged in the inner cavity of the sampling cylinder 1, when the outer wall of the movable column 2 corresponds to the sampling port 101, namely, the movable column 2 is positioned at the bottom of the inner cavity of the sampling cylinder 1, the sampling port 101 is closed, soil cannot enter the inner cavity of the sampling cylinder 1 through the sampling port 101, and when the outer wall of the movable column 2 does not correspond to the sampling port 101, namely, the movable column 2 is positioned in the inner cavity of the sampling cylinder 1 above the sampling port 101, the sampling port 101 is opened, and soil can enter the inner cavity of the sampling cylinder 1 through the sampling port 101 so as to achieve the purpose of soil sampling; and

the telescopic rod assembly 3 with the length capable of being varied in a telescopic way along the axial direction of the sampling tube 1, the telescopic rod assembly 3 is arranged on the outer side of the sampling tube 1, the remote end of the operating rod 102 is provided with an operating handle 104, the telescopic rod assembly 3 is positioned between any two adjacent operating handles 104, and the distance between the telescopic rod assembly 3 and the sampling tube 1 is smaller than the minimum distance between the operating handle 104 and the sampling tube 1; the top of the movable column 2 is provided with a movable rod 201, the top of the telescopic rod assembly 3 is connected with the movable rod 201 through the top end opening of the sampling tube 1, when the soil sampling operation is carried out, the movable column 2 is initially positioned at the bottom of the inner cavity of the sampling tube 1 under the action of self gravity and the gravity of the telescopic rod assembly 3 to close the sampling port 101, at the moment, the distance between the bottom of the telescopic rod assembly 3 and the bottom of the sampling tube 1 is adjusted by adjusting the length of the telescopic rod assembly 3, namely the sampling depth, then the sampling tube 1 is rotated to enter the position below the soil surface, when the bottommost part of the telescopic rod assembly 3 touches the soil surface, the bottom of the telescopic rod assembly 3 is blocked by the earth surface to stop following the continuous descending of the sampling tube 1, then the sampling tube 1 is pushed to continue descending, the telescopic rod assembly 3 at the moment can be blocked by the earth surface to stop the continuous descending of the movable column 2, in this way, the sampling port 101 which follows the descending of the sampling tube 1 descends to the lower part of the movable column 2, so as to achieve the purpose of opening the sampling port 101, as shown in fig. 4, the soil below the horizontal plane of the movable column 2 continuously descends to the sampling tube 1 through the sampling port 101, and enters the inner cavity below the movable column 2 in the sampling tube 1, so that the purpose of depth-fixing sampling can be achieved, the accuracy of sampling is improved, in particular, the outer wall of the sampling tube 1 is provided with scales (not shown in the drawing), the purpose of facilitating the sampling personnel to quickly adjust the sampling depth can be achieved, the effect of facilitating operation is achieved, after the sampling is completed, the sampling tube 1 is reversely withdrawn, and the soil in the sampling tube 1 can be taken out through the sampling port 101, so that the depth-fixing sampling operation can be completed, the part of the tube body structure with the sampling port 101 at the bottom of the sampling tube 1 can be provided with the split type, and the threaded connection structure can be adopted in the connection form, so that the purpose of quickly taking out soil from the sampling tube 1 can be realized by separating the bottom structure of the sampling tube 1, and the sampling convenience is improved.

According to the agricultural soil sampler disclosed by the embodiment, the telescopic rod assembly for connecting the movable column is arranged between any two operating handles, the distance between the telescopic rod assembly and the sampling cylinder is smaller than the minimum distance between the operating handles and the sampling cylinder, so that the telescopic rod assembly can be positioned on the inner side of the operating handles, arms and bodies of researchers can be positioned on the outer sides of the moving ranges of the operating handles when soil sampling operation is carried out, when the researchers rotate the sampling cylinder 1, the researchers stand on the outer sides of the operating handles to hold the operating handles and rotate the operating handles, the moving range of the operating handles by the researchers is the moving range of the operating handles, the distance between the telescopic rod assembly and the sampling cylinder is smaller than the minimum distance between the operating handles and the sampling cylinder, the moving range of the telescopic rod assembly 3 along with the sampling cylinder 1 is smaller than the moving range of the hands of the researchers, the operating range of the operating handles can be achieved, the purpose of convenient operation is achieved, and meanwhile, the distance between the telescopic rod assembly 3 and the sampling cylinder is obviously reduced, and the portable structure is further reduced.

In some embodiments, the agricultural soil sampler further comprises a start-close ring 4, the start-close ring 4 is movably sleeved outside the sampling tube 1, the bottom of the telescopic rod assembly 3 is connected with the start-close ring 4, the start-close ring 4 can play a role in increasing the contact surface between the telescopic rod assembly 3 and the soil surface, so that the blocking effect of the ground surface on the telescopic rod assembly 3 is further improved, and the start-close sensitivity of the movable column 2 is improved.

Preferably, the spiral sheet 103 is arranged on the outer wall of the sampling tube 1, the spiral sheet 103 can play a role in facilitating a researcher to operate the sampling tube 1, labor intensity is reduced, and the outer diameter of the spiral sheet 103 is smaller than the inner diameter of the opening and closing ring 4 so as to play a role in avoiding interference between the spiral sheet 103 and the opening and closing ring 4.

Preferably, referring to fig. 1 to 4, the telescopic rod assembly 3 includes a top rod 301, a middle tube 302 and a bottom tube 303, the middle tube 302 is slidably sleeved outside the top rod 301, and the bottom tube 303 is slidably sleeved outside the middle tube 302. When the sampling depth is adjusted, the whole length of the telescopic rod assembly 3 can be adjusted by only stirring the middle tube 302 and the bottom tube 303, adjusting the length of the rod section part of the top rod 301, which exposes the middle tube 302, and adjusting the length of the tube section of the middle tube 302, which exposes the bottom tube 303, so that the aim of adjusting the distance (namely the sampling depth) between the bottom of the opening and closing ring 4 and the bottom end of the sampling tube 1 can be fulfilled, and the method is convenient and quick. Meanwhile, in this embodiment, the number of the telescopic rod assemblies 3 is set to be greater than or equal to 2, and the plurality of groups of telescopic rod assemblies 3 are distributed outside the sampling tube 1 in an array manner, so that the purpose of further improving the stability of the connection structure between the opening and closing ring 4 and the movable rod 201 on the movable column 2 can be achieved, and the opening and closing sensitivity of the movable column 2 is guaranteed. In addition, the structure forms of the ejector rod, the middle pipe and the bottom pipe which are mutually sleeved are adopted, so that the effect of improving the adjusting range of the sampling depth can be achieved.

Preferably, referring to fig. 5 to 7, the telescopic rod assembly 3 further comprises:

the first locking device is arranged between the middle pipe 302 and the ejector rod 301 and is configured to limit the relative sliding between the middle pipe 302 and the ejector rod 301, and after the length adjustment between the ejector rod 301 and the middle pipe 302 is completed, the purpose of locking the relative position between the ejector rod 301 and the middle pipe 302 can be achieved through the first locking device; and

the second locking device is arranged between the bottom pipe 303 and the middle pipe 302 and is configured to limit the relative sliding between the bottom pipe 303 and the middle pipe 302, and likewise, after the length adjustment between the middle pipe 302 and the bottom pipe 303 is completed, the purpose of locking the relative position between the middle pipe 302 and the bottom pipe 303 can be achieved through the second locking device, so that the purpose of locking the preset sampling depth can be achieved through the first locking device and the second locking device.

Specifically, referring to fig. 6, the first locking device includes two first clamping plates 5 hinged at the top of the middle tube 302 and symmetrically arranged, the end of the first clamping plate 5 has a first locking block 501 with an outer shape matched with the outer wall of the ejector rod 301, a first torsion spring 6 is arranged between the first clamping plate 5 and the middle tube 302, and the first torsion spring 6 provides an elastic force for the first clamping plate 5 so as to drive the first locking block 501 to abut against the ejector rod 301. When the length of the ejector rod 301 needs to be adjusted, only the part of the first clamping plate 5, which is far away from the first locking block 501, needs to be pressed, the elastic force of the first torsion spring 6 is overcome, the first locking block 501 is tilted to be separated from the contact of the ejector rod 301, at the moment, the two first clamping plates 5 are continuously held, the two first clamping plates move along the axial direction of the sampling cylinder 1, the effect of driving the middle pipe 302 to slide on the ejector rod 301 can be achieved, when the middle pipe 302 is driven to move to a proper position, the two first clamping plates 5 are released, the purpose of locking the middle pipe 302 on the preset position of the ejector rod 301 can be achieved, the two first clamping plates 5 which are symmetrically arranged are arranged, the effect of conveniently and rapidly performing telescopic adjustment by researchers is achieved, the first clamping plates 5 adopt a structure similar to that of an A-shaped clamp is adopted, the structure is simple in structure, the aim of realizing mass production of accessories is achieved under certain conditions, the manufacturing cost is reduced, the structural material form of a rubber pad can be adopted on the structural material of the first locking block 501, the structure material can be adopted, of course, the structure of the outer surface of the ejector rod 301 is required to be contacted with the outer surface of the ejector rod 301, the corresponding friction thread can be prevented from being adopted, and the thread can be directly screwed with the outer wall of the ejector rod 301 is guaranteed, and the friction between the two and the two can be directly screwed with the corresponding to be guaranteed.

Preferably, referring to fig. 7, the second locking device includes two second clamping plates 7 hinged at the top of the bottom tube 303 and symmetrically arranged, the end of the second clamping plate 7 is provided with a second locking block 701 with a shape matched with the outer wall of the middle tube 302, a second torsion spring 8 is arranged between the second clamping plate 7 and the bottom tube 303, and the second torsion spring 8 provides elastic force for the second clamping plate 6 so as to drive the second locking block 701 to abut against the middle tube 302. Similarly, when the length of the middle tube needs to be adjusted, only two second clamping plates 7 are needed to be pressed, so that the second locking blocks 701 are separated from the middle tube 302, then the two second clamping plates 7 are continuously held, the bottom tube 303 is axially moved along the middle tube 302, the function of driving the bottom tube 303 and the opening and closing ring 4 to slide on the middle tube can be achieved, when the middle tube is moved to a proper preset position, the length of the middle tube 302 can be adjusted by releasing the two second clamping plates 7, and the purpose of adjusting the relative distance between the opening and closing ring 4 and the bottom end of the sampling tube 1 is achieved. The second clamping plate and the second locking device are made of the same material, and the first clamping plate and the first locking block are made of the same material, so that the production and the manufacturing are facilitated.

In some embodiments, referring to fig. 2 and 4, a top plate 202 is arranged at the top of the movable rod 201, the top of the ejector rod 301 is fixedly arranged on the top plate 202, and the bottom of the bottom pipe 303 is fixedly arranged on the open-close ring 4; the ejector rod 301, the middle pipe 302 and the bottom pipe 303 are arranged in parallel with the sampling cylinder 1; the top plate 202 can function as an intermediate connection between the movable rod 201 and the telescopic rod assembly 3, and is also beneficial to improving the parallelism stability between the telescopic rod assembly 3 and the sampling tube 1.

When sampling, the start-stop ring 4 can rotate along with the sampling tube 1 in synchronization when contacting with the soil surface, the friction force of the soil surface can reduce the rotation speed of the start-stop ring 4, and the start-stop ring 4 is twisted relative to the sampling tube 1, therefore, as a preferred scheme of the embodiment, referring to the figure, the agricultural soil sampler further comprises a stable tube 9 fixedly arranged outside the sampling tube 1, the axis of the stable tube 9 is parallel to the axis of the sampling tube 1, the ejector rod 301 is slidably arranged in the stable tube 9, the function of improving the structural stability of the telescopic rod assembly 3 and the start-stop ring 4 can be achieved through the stable tube 9, the guiding function of the telescopic rod assembly 3, particularly the ejector rod 301, is achieved, the purpose of improving the torsion resistance of the telescopic rod assembly 3, particularly the ejector rod 301 is achieved, the rotation synchronism between the start-stop ring 4 and the sampling tube 1 is improved, the effect of guaranteeing the sensitivity of the movable column 2 to the sampling port 101 is achieved, and the depth-fixing sampling accuracy of the sampler is improved.

To sum up, the agricultural soil sampler disclosed in this embodiment can bring the following beneficial effects:

1) According to the sampler, the telescopic rod assembly capable of opening and closing the sampling port in a linkage way is arranged on the outer side of the sampling cylinder, and the distance between the telescopic rod assembly and the sampling cylinder is smaller than the minimum distance between the operating handle and the sampling cylinder, so that the purpose that the telescopic rod assembly does not interfere with the operation of researchers during sampling operation is achieved, the purpose of convenient operation is achieved, meanwhile, the function of reducing the structural space of the sampler is achieved, and portability is improved;

2) The movable sleeve is arranged on the opening and closing ring outside the sampling cylinder, so that the friction blocking effect of the ground surface on the telescopic rod assembly can be further improved during sampling, and the opening and closing sensitivity of the movable column is improved;

3) The locking device in the telescopic rod assembly adopts a structure form of combining a clamping plate with the interaction of a torsion spring, so as to achieve the purpose of abutting and locking the ejector rod or the middle pipe and realize the purpose of locking the preset sampling depth;

4) The stable pipe can play the effect of promoting the structural stability of telescopic link subassembly and start the closed loop, in sampling process, can promote the rotatory synchronism between closed loop and the sampling tube to play the effect of guaranteeing the sensitivity of opening and close of movable column to the sampling mouth, and then improve the depthkeeping sampling accuracy of this sampler.

Example 2

In particular, for the first locking device and the second locking device, besides the a-shaped clip structure mentioned in embodiment 1, the structure of the locking device can also adopt a locking bead structure similar to an umbrella shaft, that is, referring to fig. 8, the first locking device comprises a locking ball head 10 and a locking spring 11, an embedding cavity 12 is formed on the outer wall of the ejector rod 301, the locking ball head 10 is movably arranged in the embedding cavity 12, a plurality of first limiting holes 13 matched with the locking ball head 10 are arranged on the middle tube 302 along the axial direction, and the part of the locking ball head 10 protruding out of the outer wall of the ejector rod 301 is configured to be capable of being located in the movement range of the first limiting holes 13. When the length needs to be adjusted, the locking ball head 10 is pressed down to retract into the embedding cavity 12, and then the middle tube 302 is axially shifted, so that the first limiting hole 13 on the locking ball head can be aligned with the embedding cavity 12, and therefore, the locking ball head 10 can move into the first limiting hole 13 under the elastic action of the locking spring 12 to realize the position locking of the middle tube 302, the length adjustment and the length locking of the telescopic rod assembly can be realized, the structure of the second locker is also adopted, and the structure is not repeated, so that compared with the structure of the embodiment 1, the structure is relatively simple, the cost is lower, but due to the fact that the relative length between the middle tube and the ejector rod is telescopically adjusted, the relative length between the first limiting holes is limited by the factors of the distance, the number and the like, compared with the fact that the embodiment 1 has more obvious advantages in the continuity of length adjustment, therefore, the embodiment 1 and the locking structure in the embodiment can be adjusted according to corresponding requirements in practical application, the optimal use purpose can be achieved.

Example 3

Because the rotation of the start-stop ring 4 can generate a certain swinging effect on the movable rod during sampling, in the embodiment, referring to fig. 9, a steering column 203 is arranged on the movable rod 201, the shape of the steering column 203 is matched with the inner cavity of the sampling cylinder 1, specifically, the outer diameter of the steering column 203 is matched with the inner diameter of the sampling cylinder 1, so as to realize the swinging limiting effect on the movable rod 203, and of course, the steering column structure in the embodiment can be synchronously applied to the sampler together with the steering tube 9 in the embodiment 1, so that the effect of improving the structural stability can be further achieved;

a top cover 105 is arranged at the opening of the top of the sampling tube 1, a through hole is formed in the middle of the top cover 105, and the top of the movable rod 201 penetrates through the through hole and is connected with the telescopic rod assembly 3; the opening and closing spring 14 is arranged between the top cover 105 and the steering column 203, when the movable column 2 is positioned at the bottom of the inner cavity of the sampling tube 1 to close the sampling port 101, the opening and closing spring 14 applies elastic acting force towards the movable column 2 to the steering column 203, and in the rotating descending process of the sampling tube 1, the soil can generate upward friction force on the outer wall of the movable column 2 at the sampling port 101, so that the opening and closing spring 14 is arranged between the top cover 105 and the steering column 203, the purpose of improving the closing stability of the movable column 2 is achieved by the downward elastic acting force of the opening and closing spring 14, and in practical application, the elastic coefficient of the opening and closing spring 14 is only required to be properly set so as to overcome the friction force of the soil, and the movable column 2 can not be opened when the sampling tube descends.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. An agricultural soil sampler, comprising:

the top outer wall is provided with a sampling cylinder (1) with a plurality of operating levers (102), the top end of the sampling cylinder (1) is provided with an opening, the bottom end of the sampling cylinder is provided with a sampling port (101), and the sampling port (101) is communicated with the inner cavity of the sampling cylinder (1);

a movable column (2) capable of closing or opening the sampling port (101), wherein the movable column (2) is movably arranged in the inner cavity of the sampling cylinder (1); and

the length of the telescopic rod assembly (3) can be changed in a telescopic way along the axial direction of the sampling cylinder (1), the telescopic rod assembly (3) is arranged on the outer side of the sampling cylinder (1), the remote end of the operating rod (102) is provided with an operating handle (104), the telescopic rod assembly (3) is positioned between any two adjacent operating handles (104), and the distance between the telescopic rod assembly (3) and the sampling cylinder (1) is smaller than the minimum distance between the operating handle (104) and the sampling cylinder (1);

the top of the movable column (2) is provided with a movable rod (201), and the top of the telescopic rod assembly (3) is connected with the movable rod (201) through the top end opening of the sampling tube (1).

2. The agricultural soil sampler of claim 1, further comprising a start-up ring (4), wherein the start-up ring (4) is movably sleeved outside the sampling cylinder (1), and the bottom of the telescopic rod assembly (3) is connected with the start-up ring (4).

3. Agricultural soil sampler according to claim 2, characterized in that the outer wall of the sampling cylinder (1) is provided with a spiral sheet (103), the outer diameter of the spiral sheet (103) being smaller than the inner diameter of the open-close ring (4).

4. An agricultural soil sampler according to claim 2 or 3, characterized in that the telescopic rod assembly (3) comprises a top rod (301), a middle tube (302) and a bottom tube (303), the middle tube (302) is slidably sleeved outside the top rod (301), and the bottom tube (303) is slidably sleeved outside the middle tube (302).

5. The agricultural soil sampler of claim 4, wherein the telescopic rod assembly (3) further comprises:

a first locker provided between the middle pipe (302) and the ejector rod (301) and configured to be able to restrict relative sliding between the middle pipe (302) and the ejector rod (301); and

a second locker disposed between the bottom tube (303) and the middle tube (302) and configured to be capable of restricting relative sliding between the bottom tube (303) and the middle tube (302).

6. The agricultural soil sampler according to claim 5, characterized in that the first locking device comprises two first clamping plates (5) hinged to the top of the middle pipe (302) and symmetrically arranged, the end parts of the first clamping plates (5) are provided with first locking blocks (501) with the shapes matched with the outer wall of the ejector rod (301), first torsion springs (6) are arranged between the first clamping plates (5) and the middle pipe (302), and the first torsion springs (6) provide elastic force for the first clamping plates (5) so as to drive the first locking blocks (501) to abut against the ejector rod (301).

7. The agricultural soil sampler according to claim 5, characterized in that the second locking device comprises two second clamping plates (7) hinged at the top of the bottom pipe (303) and symmetrically arranged, the end parts of the second clamping plates (7) are provided with second locking blocks (701) with the shapes matched with the outer wall of the middle pipe (302), second torsion springs (8) are arranged between the second clamping plates (7) and the bottom pipe (303), and the second torsion springs (8) provide elastic force for the second clamping plates (7) so as to drive the second locking blocks (701) to abut against the middle pipe (302).

8. The agricultural soil sampler according to claim 5, 6 or 7, characterized in that a top disc (202) is arranged at the top of the movable rod (201), the top of the ejector rod (301) is fixedly arranged on the top disc (202), and the bottom of the bottom tube (303) is fixedly arranged on the opening and closing ring (4);

the ejector rod (301), the middle pipe (302) and the bottom pipe (303) are all arranged in parallel with the sampling tube (1).

9. The agricultural soil sampler according to claim 8, further comprising a stabilizing tube (9) fixedly arranged outside the sampling tube (1), wherein the axis of the stabilizing tube (9) is arranged in parallel with the axis of the sampling tube (1), and the ejector rod (301) is slidably arranged in the stabilizing tube (9).

10. The agricultural soil sampler according to claim 1 or 2 or 3 or 5 or 9, characterized in that a steering column (203) is arranged on the movable rod (201), and the shape of the steering column (203) is matched with the inner cavity of the sampling cylinder (1);

a top cover (105) is arranged at the opening of the top of the sampling tube (1), a through hole is formed in the middle of the top cover (105), and the top of the movable rod (201) penetrates through the through hole and is connected with the telescopic rod assembly (3);

an opening and closing spring (14) is arranged between the top cover (105) and the steering column (203), and when the movable column (2) is positioned at the bottom of the inner cavity of the sampling cylinder (1) to close the sampling port (101), the opening and closing spring (14) applies elastic acting force towards the movable column (2) to the steering column (203).