Sampling device for rhizosphere soil

Abstract

The utility model discloses a rhizosphere soil sampling device which comprises a protection tube, a soil penetrating head is fixedly connected to the bottom end of the protection tube, an auxiliary shovel is fixedly connected to the outer wall of the soil penetrating head, a sampling tube penetrates through the inner side of the protection tube, a rotating sleeve is fixed to the top end of the sampling tube, and the rotating sleeve is fixedly connected to the outer wall of the soil penetrating head. A containing groove is formed in the middle of the bottom end face of the sampling pipe, a sliding groove is formed in the edge of the bottom end face of the sampling pipe, a sliding block is slidably installed on the inner side of the sliding groove, the end, extending out of the sliding groove, of the sliding block is fixedly connected with an extension plate, and the end of the extension plate is fixedly connected with a surrounding plate; the sampling device is simple in structural design, small in size and small in damage possibility to plant root systems during sampling, the whole sampling device is cylindrical, the sampling device can be inserted into a soil layer at various angles for sampling, and the sampling device is provided with a soil penetrating head and an auxiliary shovel, so that the sampling device is very labor-saving and convenient during soil penetrating, and the sampling efficiency is improved. Meanwhile, the sampling device has a good carrying-out effect on the soil sample.

Description

Technical Field

[0001] The utility model relates to the technical field of soil sampling, in particular to a sampling device for rhizosphere soil. Background Technique

[0002] Soil sampling refers to the method of collecting soil samples, including the layout of sampling and sampling techniques. When collecting soil samples from a soil profile, it should be carried out after the observation and record of the soil profile. If the metal content in the soil is to be analyzed, metal utensils should be avoided for sampling. When sampling in the field, due to the uneven spatial distribution of the soil itself, sampling should be carried out at multiple points in the form of a plot and then mixed into a mixed sample, so as to better represent the soil properties of the sampling area. Among them, for the sampling of rhizosphere soil of plants, since many chemical conditions and biochemical processes in the rhizosphere are different from those in the bulk soil, the most obvious ones are the changes in rhizosphere pH, Eh and microbial activity, etc. Therefore, sampling of rhizosphere soil is of great significance.

[0003] Existing sampling devices for rhizosphere soil of plants have a relatively large structural design, which is very easy to damage plant roots, and it is more laborious to enter the soil, and the entry angle is also limited, lacking flexibility. At the same time, when sampling soil, the ability to carry out the sample is relatively average. When the sample soil is carried out, it is easy to slide off, resulting in a small amount of the obtained sample.

[0004] Therefore, the technical personnel in the field provide a sampling device for rhizosphere soil to solve the problems raised in the above background technique. Content of the Utility Model

[0005] The purpose of the utility model is to provide a sampling device for rhizosphere soil to solve the problems in the existing sampling device for rhizosphere soil of plants, such as relatively large structural design, more laborious to enter the soil, limited entry angle, and relatively average ability to carry out the sample when sampling soil, as raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution:

[0007] A sampling device for rhizosphere soil, comprising: a protection tube, the bottom end of the protection tube is fixedly connected with an earth-entering head, and an internal thread section is integrally arranged above the inner side of the protection tube. The outer wall of the earth-entering head is fixedly connected with an auxiliary shovel, and a shovel edge is arranged at the bottom of the auxiliary shovel. A sampling tube penetrates through the inner side of the protection tube, and an external thread section is arranged above the sampling tube. The top end of the sampling tube is fixed with a rotating sleeve, and a receiving groove is arranged in the middle of the bottom end face of the sampling tube. A sliding groove is arranged at the edge of the bottom end face of the sampling tube, and a slider is slidably installed inside the sliding groove. The end of the slider extending out of the sliding groove is fixedly connected with an extension plate, and the end of the extension plate is fixedly connected with an enclosing plate.

[0008] As a solution in the present utility model, the soil penetration head has an arc-cone structure, and an open mouth is provided inside the bottom end port of the soil penetration head.

[0009] As a solution in the present utility model, the auxiliary shovel has an arc shape, and the outer side surface of the auxiliary shovel is parallel to the outer wall surface of the protection pipe.

[0010] As a solution in the present utility model, the thread sizes between the internal thread section and the external thread section are matched, and the sampling pipe is threadedly connected to the protection pipe through the internal thread section and the external thread section.

[0011] As a solution in the present utility model, the rotating sleeve is sleeved on the outer side of the top end of the protection pipe, and the inner wall surface of the rotating sleeve fits with the outer wall surface of the top end of the protection pipe.

[0012] As a solution in the present utility model, the extension plate is inclined outward at 15° with respect to the central axis of the sampling pipe, and the surrounding plate is arc-inwardly retracted with respect to the central axis of the sampling pipe.

[0013] As a solution in the present utility model, the extension plate is slidably connected to the sampling pipe through the cooperation of a slider and a chute, and the extension plates are uniformly arranged with respect to the central axis of the sampling pipe.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. The structure of this sampling device is simply designed, small in size, and has a small possibility of damaging plant roots during sampling. The whole sampling device is in a cylindrical shape and can be inserted into the soil layer at various angles for sampling. Moreover, this sampling device is provided with a soil penetration head and an auxiliary shovel, which is very labor-saving and convenient when entering the soil. At the same time, this sampling device has a good effect of carrying out soil samples.

[0016] 2. The sampling pipe can rotate in the protection pipe to move up and down by using the thread cooperation between the internal thread section and the external thread section. When the sampling pipe moves up, the extension plate and the surrounding plate are blocked by the open mouth, and will slide correspondingly under the sliding cooperation structure of the chute and the slider. Finally, when the extension plate and the surrounding plate are completely retracted into the soil penetration head, the extension plate and the surrounding plate will enclose, so that the soil sample captured therein can be carried out well and completely. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural view of a sampling device for rhizosphere soil.

[0018] Figure 2 It is a schematic overall external structure view of the sampling pipe and the rotating sleeve in a sampling device for rhizosphere soil.

[0019] Figure 3 For a sampling device for rhizosphere soilFigure 2 Schematic diagram of the enlarged structure at A in the middle.

[0020] Figure 4 It is a schematic diagram of a half-section structure of a protective tube in a sampling device for rhizosphere soil.

[0021] In the figure: 1. Protective tube; 2. Soil entry head; 3. Internal thread section; 4. Open end; 5. Auxiliary shovel; 6. Shovel blade; 7. Sampling tube; 8. External thread section; 9. Rotating sleeve; 10. Accommodating groove; 11. Slide groove; 12. Slide block; 13. Extension plate; 14. Enclosing plate. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 to 4 , the embodiment of the present invention provides a sampling device for rhizosphere soil, including: a protective tube 1, the bottom end of the protective tube 1 is fixedly connected with a soil entry head 2, and an internal thread section 3 is integrally arranged above the inner side of the protective tube 1. The soil entry head 2 is in an arc cone shape, and an open end 4 is arranged inside the bottom end port of the soil entry head 2;

[0024] Specifically, the soil entry head 2 is arranged in an arc cone shape similar to a bullet head, which is convenient for entering the soil and makes it more labor-saving and fast when entering the soil. The setting of the open end 4 is to achieve sampling so that the soil sample can be carried out completely;

[0025] The outer wall of the soil entry head 2 is fixedly connected with an auxiliary shovel 5, and a shovel blade 6 is arranged at the bottom of the auxiliary shovel 5. The auxiliary shovel 5 is in an arc shape, and the outer side surface of the auxiliary shovel 5 is parallel to the outer wall surface of the protective tube 1;

[0026] Specifically, the auxiliary shovel 5 is designed in an arc shape and surrounds the periphery of the soil entry head 2, which is used to assist the sampling device to enter the soil and makes it more labor-saving when the sampling device is inserted into the soil layer;

[0027] A sampling tube 7 penetrates through the inner side of the protective tube 1, and an external thread section 8 is arranged above the sampling tube 7. The thread sizes between the internal thread section 3 and the external thread section 8 are matched, and the sampling tube 7 is threadedly connected with the protective tube 1 through the internal thread section 3 and the external thread section 8;

[0028] Specifically, the sampling tube 7 is installed inside the protective tube 1 through the cooperation of the internal thread section 3 and the external thread section 8. By using the thread cooperation between the internal thread section 3 and the external thread section 8, the sampling tube 7 can rotate inside the protective tube 1 to achieve movement, and thus complete the sampling work of the sampling tube 7;

[0029] A rotating sleeve 9 is fixed at the top end of the sampling tube 7, and a receiving groove 10 is provided in the middle of the bottom end face of the sampling tube 7. The rotating sleeve 9 is sleeved outside the top end of the protective tube 1, and the inner wall surface of the rotating sleeve 9 is in contact with the outer wall surface of the top end of the protective tube 1;

[0030] Specifically, the rotating sleeve 9 is movably sleeved on the top end of the protective tube 1, and the sampling personnel can directly rotate the rotating sleeve 9 to rotate the sampling tube 7;

[0031] A sliding groove 11 is provided at the edge of the bottom end face of the sampling tube 7, and a sliding block 12 is slidably installed inside the sliding groove 11. The end of the sliding block 12 extending out of the sliding groove 11 is fixedly connected with an extension plate 13, and the end of the extension plate 13 is fixedly connected with a surrounding plate 14. The extension plate 13 is inclined outward at 15° with respect to the central axis of the sampling tube 7, and the surrounding plate 14 is arc-shaped and inwardly retracted with respect to the central axis of the sampling tube 7. The extension plate 13 is slidably connected with the sampling tube 7 through the cooperation of the sliding block 12 and the sliding groove 11, and the extension plates 13 are uniformly arranged with respect to the central axis of the sampling tube 7;

[0032] Specifically, the receiving groove 10 is used to hold the soil sample, and the slidable extension plate 13 and surrounding plate 14 installed below the sampling tube 7 are used to carry out the soil sample. The extension plate 13 and the surrounding plate 14 can slide at the bottom end of the sampling tube 7 by means of the cooperation of the sliding block 12 and the sliding groove 11. Therefore, when the sampling tube 7 moves upward, the extension plate 13 and the surrounding plate 14 will be blocked by the open end 4 and slide accordingly, and then close towards the central axis of the sampling tube 7. When the extension plate 13 and the surrounding plate 14 are completely retracted into the soil head 2, the extension plate 13 and the surrounding plate 14 will enclose, so that the soil sample captured therein can be taken out well and completely.

[0033] The working principle of the present utility model is:

[0034] First, align the soil penetration head 2 with the position of the root of the plant to be sampled, and push the protection tube 1 downward. By using the soil penetration head 2 and the auxiliary shovel 5 connected to its periphery, the sampling device can be easily inserted into the soil layer. Then, rotate the rotating sleeve 9, and the sampling tube 7 will rotate accordingly. Under the threaded engagement structure of the internal thread section 3 and the external thread section 8, rotating the sampling tube 7 can move the sampling tube 7 up and down. Move the sampling tube 7 upward, and the extension plate 13 and the surrounding plate 14 will follow and move upward. When the extension plate 13 and the surrounding plate 14 are completely retracted into the soil penetration head 2, the extension plate 13 and the surrounding plate 14 will be completely surrounded under the cooperation of the slider 12 and the chute 11, so that the soil sample can be grabbed. Finally, pull out the protection tube 1, and the soil sample can be taken out well and completely. When taking out the soil sample, just rotate the rotating sleeve 9 to move the sampling tube 7 downward, so that the extension plate 13 and the surrounding plate 14 will extend out of the protection tube 1, and the extension plate 13 and the surrounding plate 14 will open, and the soil sample inside can be released.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A sampling device for rhizosphere soil, characterized in that, Comprising: A protection tube (1), the bottom end of the protection tube (1) is fixedly connected with an earth-entering head (2), and an internal thread section (3) is integrally arranged above the inner side of the protection tube (1). An auxiliary shovel (5) is fixedly connected to the outer wall of the earth-entering head (2), and a shovel blade (6) is arranged at the bottom of the auxiliary shovel (5). A sampling tube (7) penetrates through the inner side of the protection tube (1), and an external thread section (8) is arranged above the sampling tube (7). The top end of the sampling tube (7) is fixed with a rotating sleeve (9), and a receiving groove (10) is arranged in the middle of the bottom end face of the sampling tube (7). A sliding groove (11) is arranged at the edge of the bottom end face of the sampling tube (7), and a sliding block (12) is slidably installed inside the sliding groove (11). The end of the sliding block (12) extending out of the sliding groove (11) is fixedly connected with an extension plate (13), and the end of the extension plate (13) is fixedly connected with an enclosing plate (14).

2. The sampling device for rhizosphere soil according to claim 1, wherein The earth-entering head (2) has a circular arc conical structure, and an open mouth (4) is arranged inside the bottom end port of the earth-entering head (2).

3. The sampling device for rhizosphere soil according to claim 1, wherein, The auxiliary shovel (5) has a circular arc shape, and the outer side surface of the auxiliary shovel (5) is parallel to the outer wall surface of the protection tube (1).

4. The sampling device for rhizosphere soil according to claim 1, characterized in that, The thread dimensions between the internal thread section (3) and the external thread section (8) are matched, and the sampling tube (7) is threadedly connected with the protection tube (1) through the internal thread section (3) and the external thread section (8).

5. The sampling device for rhizosphere soil according to claim 1, characterized in that, The rotating sleeve (9) is sleeved on the outer side of the top end of the protection tube (1), and the inner wall surface of the rotating sleeve (9) is in contact with the outer wall surface of the top end of the protection tube (1).

6. The sampling device for rhizosphere soil according to claim 1, characterized in that, The extension plate (13) is inclined outward at 15° with respect to the central axis of the sampling tube (7), and the enclosing plate (14) is arcally retracted inward with respect to the central axis of the sampling tube (7).

7. The sampling device for rhizosphere soil according to claim 1, wherein, The The extension plate (13) is slidably connected with the sampling tube (7) through the cooperation of the sliding block (12) and the sliding groove (11), and the extension plates (13) are uniformly arranged with respect to the central axis of the sampling tube (7).

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