Soil sampling device

Abstract

The soil sampling device comprises an outer pipe, a soil drilling end is formed at the lower end of the outer pipe, a mounting channel is formed in the outer pipe in the length direction, the inner pipe is located in the mounting channel, the lower end of the inner pipe is open to form a sampling cavity, an annular mounting groove is formed in the lower end of the inner pipe in the circumferential direction, and an annular shearing piece is arranged corresponding to the mounting groove; the lower end of the inner pipe forms a second shearing edge corresponding to the first shearing edge, the inner wall of the outer pipe is provided with a limiting unit corresponding to the shearing piece, the inner pipe is used for driving the shearing piece to extend out along the lower end of the installation channel, and the limiting unit is used for connecting the shearing piece and limiting the shearing piece to move only in the axis direction of the installation channel. By arranging the first shearing edge and the second shearing edge, the root system at the position of the soil drilling end is sheared, so that the root system is prevented from hindering insertion of the outer pipe, and the outer pipe can conveniently enter a deep soil layer.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, and more particularly to a soil sampling device. Background Art

[0002] Soil sampling refers to selecting a representative portion of soil in the target area and subsequently processing it to prepare an analytical sample, so as to evaluate data such as the moisture content / microbial biomass / heavy metal content of the soil at different locations / depths based on the sample.

[0003] Most of today's soil sampling equipment uses a tubular sampling tube, which is inserted into the soil and extended to complete the collection. In actual use, when facing environments such as shrubs, when the sampling tube is inserted into the soil, it will be difficult to move forward due to the vegetation roots during the rotation or advancement process. The sampling tube often needs to be pulled out and manually cleaned to complete the subsequent advancement. When the root system is deep, it cannot be cleaned manually and can only be replaced in advance, which makes the entire sampling process time-consuming and labor-intensive, and therefore needs to be improved. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a soil sampling device that can shear the roots of vegetation, thereby facilitating deep sampling.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A soil sampling device comprises an outer tube, the lower end of the outer tube forms a soil drilling end, and the outer tube forms an installation channel along the length direction;

[0007] An inner tube, wherein the inner tube is located in the installation channel, the lower end of the inner tube is open to form a sampling cavity, the lower end of the inner tube is circumferentially provided with an annular installation groove and an annular shear piece is provided corresponding to the installation groove, the lower end of the shear piece forms a toothed first shear edge, the lower end of the inner tube forms a second shear edge corresponding to the first shear edge, the inner wall of the outer tube is provided with a limiting unit corresponding to the shear piece, the inner tube is used to drive the shear piece to extend out along the lower end of the installation channel, the limiting unit is used to connect the shear piece and limit the shear piece to move only along the axial direction of the installation channel, so that the first shear edge and the second shear edge are staggered to complete the shearing work.

[0008] As a further improvement of the present invention, a limit groove is provided on the inner wall of the drilling end corresponding to the installation groove, and the limit unit includes a plurality of guide blocks, which are arranged along the length direction of the installation channel and circumferentially arranged around the inner wall of the installation channel. The shear piece includes a connecting part, which is respectively accommodated in the installation groove and the limit groove, and a guide groove is provided on the side wall of the connecting part corresponding to the guide block and is slidably limited with the guide block.

[0009] As a further improvement of the present invention, a first connecting section is formed at the upper end of the inner tube, a movable section is provided at the outer tube corresponding to the first connecting section and a second connecting section is provided at the lower side corresponding to the movable section, the first connecting section is movably connected to the movable section, and the first connecting section is threadedly connected to the second connecting section.

[0010] As a further improvement of the present invention, a pressure-controlled groove communicating with the sampling cavity is provided on the side wall of the inner tube along the length direction, and the upper end of the pressure-controlled groove is connected to the outside.

[0011] As a further improvement of the present invention, the outer wall of the outer tube is provided with a plurality of pedaling units along the length direction, and the pedaling units include a plurality of pedals arranged circumferentially around the outer tube, and the outer tube is provided with a storage groove corresponding to the pedal, and one end of the pedal is hinged to the storage groove.

[0012] As a further improvement of the present invention, the soil drilling end is provided with an inclined surface in the circumferential direction.

[0013] As a further improvement of the present invention, the shear sheet also includes an annular sheet body, a plurality of hook-shaped connecting sheets are formed on the upper side of the sheet body, a connecting groove is formed on the lower side of the connecting portion corresponding to the sheet body, a limiting rod is provided in the connecting groove, and the connecting sheet is used to clamp the limiting rod to limit the upward and downward movement of the sheet body relative to the connecting portion.

[0014] Beneficial effects of the present invention:

[0015] 1. By setting the first shearing edge and the second shearing edge, the roots at the drilling end are sheared, thereby avoiding the obstruction of the insertion of the outer tube by the roots, so as to facilitate the outer tube to enter the deep soil layer;

[0016] 2. Through the arrangement of the inner tube and the outer tube, the shearing piece and the second shearing edge can be hidden in the installation channel by the movement of the outer tube, thereby achieving a protective effect to reduce wear during the entry process;

[0017] 3. The rotating shearing method can facilitate operation and provide greater shearing force to improve the shearing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional diagram of the overall installation of the present invention;

[0019] Figure 2 for Figure 1 A partial enlarged view;

[0020] Figure 3 It is a schematic diagram of the sheet.

[0021] Figure numerals: 1. outer tube; 2. drilling end; 3. installation channel; 4. inner tube; 5. sampling chamber; 6. installation groove; 7. shear plate; 8. first shear edge; 9. second shear edge; 10. limit unit; 11. limit groove; 12. connecting part; 13. first connecting section; 14. movable section; 15. second connecting section; 16. pressure control groove; 17. pedal unit; 18. storage groove; 19. inclined surface; 20. sheet body; 21. connecting plate; 22. connecting groove; 23. limit rod. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same components are represented by the same reference numerals.

[0023] like Figure 1-3 As shown, a soil sampling device comprises an outer tube 1, a soil drilling end 2 is formed at the lower end of the outer tube 1, and an installation channel 3 is formed along the length direction of the outer tube 1.

[0024] Preferably, it also includes an inner tube 4, which is located in the installation channel 3. At the same time, the inner tube 4 slides with the installation channel 3, and the lower end of the inner tube 4 is opened to form a sampling cavity 5. The lower end of the inner tube 4 is circumferentially provided with an annular installation groove 6 and an annular shear piece 7 is provided corresponding to the installation groove 6. The lower end of the shear piece 7 forms a toothed first shear edge 8, and the lower end of the inner tube 4 forms a second shear edge 9 corresponding to the first shear edge 8. The inner wall of the outer tube 1 is provided with a limiting unit 10 corresponding to the shear piece 7. The inner tube 4 is used to drive the shear piece 7 to extend out along the lower end of the installation channel 3. The limiting unit 10 is used to connect the shear piece 7 and limit the shear piece 7 to move only along the axial direction of the installation channel 3, so that the first shear edge 8 and the second shear edge 9 are staggered to complete the shearing work.

[0025] When in use, the operator applies force to the outer tube 1 to drive the device as a whole to be inserted into the soil and move to the deep soil layer, so that the soil enters the sampling cavity 5 to complete the soil sampling effect of different soil layers. When the drilling end 2 has difficulty in moving forward due to the presence of roots at the drilling end 2, the inner tube 4 can be pressed to make the inner tube 4 move further and drive the shear piece 7 to partially extend out of the drilling end 2, so that the first shear edge 8 and the second shear edge 9 can extend out of the drilling end 2, so that the root system is located between the first shear edge 8 and the second shear edge 9, and the shearing effect on the root system is further completed by rotating the inner tube 4.

[0026] At the same time, when there is no root obstruction during the advancement of the outer tube 1, the movable outer tube 1 can retract the first shear edge 8 and the second shear edge 9 into the installation channel 3 to complete the concealment effect, so that during the advancement process, the drilling end 2 is still used as the main force-applying part to reduce the wear of the first shear edge 8 and the second shear edge 9, thereby increasing the service life.

[0027] Preferably, a limit groove 11 is provided on the inner wall of the drilling end 2 corresponding to the mounting groove 6, the limit unit 10 includes a plurality of guide blocks, the plurality of guide blocks are arranged along the length direction of the mounting channel 3 and are arranged circumferentially around the inner wall of the mounting channel 3, the shear piece 7 includes a connecting portion 12, the connecting portion 12 is respectively accommodated in the mounting groove 6 and the limit groove 11, the side wall of the connecting portion 12 is provided with a guide groove corresponding to the guide block and is slidably limited with the guide block.

[0028] Preferably, a first connecting section 13 is formed at the upper end of the inner tube 4, and the outer tube 1 is provided with a movable section 14 corresponding to the first connecting section 13 and a second connecting section 15 corresponding to the lower side of the movable section 14, the first connecting section 13 is movably connected to the movable section 14, and the first connecting section 13 is threadedly connected to the second connecting section 15.

[0029] In the initial state, the first connecting section 13 and the second connecting section 15 are threadedly fixed. At this time, during the advancement process in the soil, the shear piece 7 will be naturally pushed to the uppermost end, so that the connecting portion 12 is in conflict with the upper end of the limiting groove 11; when a shearing action is required, the inner tube 4 is twisted to make the inner tube 4 move further toward the drilling end 2, so that the bottom of the installation groove 6 is in conflict with the shear piece 7 and drives the shear piece 7 to move, so that the first shear edge 8 and the second shear edge 9 extend out of the drilling end 2. Further, when the first connecting section 13 is separated from the second connecting section 15 and connected to the movable section 14, the connecting section 12 is driven by the installation groove 6 and is located at the bottom of the limiting groove 11. At this time, the first shear edge 8 and the second shear edge 9 both extend out of the drilling end 2. Due to the movable connection between the first connecting section 13 and the movable section 14, the inner tube 4 can be rotated by rotating the inner tube 4 so that the inner tube 4 rotates relative to the shear piece 7, thereby achieving the mutually staggered shearing effect of the first shear edge 8 and the second shear edge 9.

[0030] Preferably, a pressure-controlling groove 16 communicating with the sampling chamber 5 is provided on the side wall of the inner tube 4 along the length direction, and the upper end of the pressure-controlling groove 16 is connected to the outside.

[0031] By setting the pressure-controlled groove 16, the pressure in the sampling chamber 5 can be maintained during the forward process, so as to avoid the difficulty of subsequent soil entering the sampling chamber 5 due to excessive pressure in the sampling chamber 5 after the soil enters the sampling chamber 5. At the same time, by setting the pressure-controlled groove 16, the soil in the sampling chamber 5 can be removed through the pressure-controlled groove 16 after the sampling is completed, so as to facilitate use.

[0032] Preferably, the outer wall of the outer tube 1 is provided with a plurality of pedal units 17 along the length direction, and the pedal unit 17 includes a plurality of pedals circumferentially arranged around the outer tube 1 . The outer tube 1 is provided with a storage groove 18 corresponding to the pedal, and one end of the pedal is hinged to the storage groove 18 .

[0033] The arrangement of the storage groove 18 can conceal the pedal unit 17, thereby avoiding the adverse effect of the pedal on the movement of the outer tube 1, and also facilitates the operator to apply force for easy use.

[0034] Preferably, the drilling end 2 is provided with an inclined surface 19 in the circumferential direction.

[0035] The provision of the inclined surface 19 can further reduce the resistance of the drilling end 2 when it moves forward.

[0036] Preferably, the shear piece 7 also includes an annular sheet body 20, a plurality of hook-shaped connecting pieces 21 are formed on the upper side of the sheet body 20, a connecting groove 22 is formed on the lower side of the connecting portion 12 corresponding to the sheet body 20, a limiting rod 23 is provided in the connecting groove 22, and the connecting piece 21 is used to clamp the limiting rod 23 to limit the upward and downward movement of the sheet body 20 relative to the connecting portion 12.

[0037] The arrangement of the connecting piece 21 and the limiting rod 23 enables the sheet body 20 to be quickly assembled and disassembled, thereby facilitating replacement and maintenance.

[0038] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A soil sampling device, Features: It comprises an outer tube (1), the lower end of the outer tube (1) forms a soil drilling end (2), and the outer tube (1) forms a mounting channel (3) along the length direction; An inner tube (4) is located in the installation channel (3), the lower end of the inner tube (4) is open to form a sampling cavity (5), the lower end of the inner tube (4) is circumferentially provided with an annular installation groove (6) and an annular shearing piece (7) is provided corresponding to the installation groove (6), the lower end of the shearing piece (7) forms a toothed first shearing edge (8), the lower end of the inner tube (4) forms a second shearing edge (9) corresponding to the first shearing edge (8), the inner wall of the outer tube (1) is provided with a limiting unit (10) corresponding to the shearing piece (7), the inner tube (4) is used to drive the shearing piece (7) to extend along the lower end of the installation channel (3), and the limiting unit (10) is used to connect the shearing piece (7) and limit the shearing piece (7) to move only along the axial direction of the installation channel (3), so that the first shearing edge (8) and the second shearing edge (9) are staggered to complete the shearing work.

2. A soil sampling device according to claim 1, Features: The inner wall of the drilling end (2) is provided with a limiting groove (11) corresponding to the mounting groove (6); the limiting unit (10) comprises a plurality of guide blocks, the plurality of guide blocks are arranged along the length direction of the mounting channel (3) and are arranged circumferentially around the inner wall of the mounting channel (3); the shearing piece (7) comprises a connecting portion (12), the connecting portion (12) is respectively accommodated in the mounting groove (6) and the limiting groove (11); the side wall of the connecting portion (12) is provided with a guide groove corresponding to the guide block and is slidably limited with the guide block.

3. A soil sampling device according to claim 2, Features: A first connecting section (13) is formed at the upper end of the inner tube (4); a movable section (14) is provided on the outer tube (1) corresponding to the first connecting section (13) and a second connecting section (15) is provided on the lower side of the movable section (14); the first connecting section (13) is movably connected to the movable section (14); and the first connecting section (13) is threadedly connected to the second connecting section (15).

4. A soil sampling device according to claim 1, Features: A pressure control groove (16) communicating with the sampling chamber (5) is provided on the side wall of the inner tube (4) along the length direction, and the upper end of the pressure control groove (16) is connected to the outside.

5. A soil sampling device according to claim 1, Features: The outer wall of the outer tube (1) is provided with a plurality of pedal units (17) along the length direction, the pedal units (17) comprising a plurality of pedals arranged circumferentially around the outer tube (1), the outer tube (1) is provided with a storage groove (18) corresponding to the pedal, and one end of the pedal is hinged to the storage groove (18).

6. A soil sampling device according to claim 1, Features: The soil drilling end (2) is provided with an inclined surface (19) in the circumferential direction.

7. A soil sampling device according to claim 2, Features: The shearing piece (7) further comprises an annular sheet body (20), a plurality of hook-shaped connecting pieces (21) are formed on the upper side of the sheet body (20), a connecting groove (22) is formed on the lower side of the connecting portion (12) corresponding to the sheet body (20), a limiting rod (23) is provided in the connecting groove (22), and the connecting piece (21) is used to engage with the limiting rod (23) to limit the upward and downward movement of the sheet body (20) relative to the connecting portion (12).

Images