Soil sample sampling and splitting device

Abstract

The utility model discloses a soil sample sampling division device, which belongs to the field of solid material screening, and comprises a support unit and a sampling unit, the support unit comprises at least two first vertical support rods and a first horizontal connecting plate, the first vertical support rods are arranged in parallel, and the first horizontal connecting plate is arranged on the first vertical support rods; the first horizontal connecting plates are connected with the first vertical supporting rods into a whole, and the upper surfaces of the first horizontal connecting plates form a first supporting platform. The sampling unit is in a cylinder shape with an opening in the upper end, the sampling unit comprises a second annular side plate and a second horizontal opening and closing assembly, the second horizontal opening and closing assembly is circular, the second annular side plate is arranged on the second horizontal opening and closing assembly, and the second annular side plate and the second horizontal opening and closing assembly jointly form a second middle body; the second middle body is arranged on the first supporting platform, and the first supporting platform can support the second middle body.

Description

Technical Field

[0001] The utility model relates to the field of operations, in particular to the field of screening solid materials, and specifically is a soil sample sampling and dividing device. Background Art

[0002] In the fields of agriculture, water and soil, engineering, etc., soil sampling is often required. Taking the soil census in the agricultural field as an example, soil sample collection is a very important basic work, and the accuracy and representativeness of the samples directly affect the subsequent research work. The life activities of soil organisms depend to a large extent on the physical and chemical properties of the soil, among which the main ones are soil temperature, humidity, ventilation conditions and gas composition, pH, and the quantity and composition of organic and inorganic matter. If the soil taken is not representative, subsequent inspections will not be able to reflect the true situation of soil nutrients, and will not be able to provide real and valid data for the soil census. Therefore, it is required that the soil samples taken must comply with the principle of full-layer equivalence.

[0003] At present, the soil sample quartering method is mainly used for sampling. The principle of soil sample quartering is as follows: in soil sample testing, each mixed sample needs about one kilogram. If too much sample is obtained, the excess soil needs to be discarded by quartering. The specific operation of the soil sample quartering method is as follows: crush the collected soil sample, mix it evenly and spread it, use a quartering device to divide the soil into four parts, keep the two diagonal parts, discard the other two parts, and combine the two diagonal parts into one; if the soil sample obtained is still a lot, it can be processed by quartering method to reduce the number until the required amount is obtained.

[0004] Since soil sampling is time-consuming and laborious, researchers have conducted corresponding research on soil quadrants. For example, Chinese patent application CN202020095835.0 discloses a quadrant device for soil analysis, which includes a splitting component, an enclosure component, a sampling component, a connecting component, and a shaking device; the splitting component is detachably arranged in the enclosure component, and the enclosure component and the sampling component are connected as a whole through the connecting component and placed in the shaking device; the splitting component is a "cross"-shaped quadrant plate; the enclosure component includes an enclosure and a fixing strip fixed at its bottom; the sampling component is four sampling plates of the same shape, which are respectively connected to the enclosure component through a connecting component; the shaking device includes a gasket, a base, a gyroscopic system, a turntable, and a power cord, the gasket is fixed at the four corners of the bottom surface of the base, the base is connected to the turntable through the gyroscopic system, and the power cord is arranged on the base and connected to the gyroscopic system.

[0005] Chinese patent application CN202220504638.9 discloses a simple quartering sampling device, which includes: a feed barrel, a dividing barrel and a containing barrel. The feed barrel and the dividing barrel are both in the shape of a frustum of a cone. The small end of the feed barrel is connected to the small end of the dividing barrel, and the large end of the dividing barrel is connected to the containing barrel. A cross plate is also provided in the dividing barrel and the containing barrel. The outer contour formed by the cross plate rotating around its center matches the inner wall of the dividing barrel and the containing barrel.

[0006] Chinese patent application CN202320954582.1 discloses a four-partition separator for preparing soil samples, which includes an upper frame, the bottom end of which is tightly plugged with a lower frame, and a limiting mechanism is provided on the inner walls of the upper frame and the lower frame. A separator is placed inside the upper frame and the lower frame, and the separator includes an annular baffle, the outer wall of the annular baffle is in contact with the inner side wall of the upper frame, the upper and lower ends of the annular baffle are through-shaped, and two groups of intersecting partitions are fixedly connected to the inner side wall of the annular baffle.

[0007] Chinese patent application CN201720979173.1 discloses a mechanized portable soil mixing quadrant, which includes an outer circular chamber, an inner circular chamber is arranged in the center of the outer circular chamber, a fixed central axis is arranged in the middle of the inner circular chamber, a rotating shaft is arranged in the cavity of the central axis, four telescopic partitions are evenly arranged on the central axis in the cavity of the inner circular chamber, four partition slits are opened on the circumferential wall of the inner circular chamber, the four partition slits are matched with the four telescopic partitions, four fixed rails are arranged at the bottom of the outer circular chamber and the inner circular chamber, and card slots are arranged on the left and right sides of the fixed rails. A card plate is movably arranged on the adjacent card slots of every two adjacent fixed rails, and the four card plates constitute the bottom of the outer circular chamber.

[0008] The disadvantage of the traditional quadripartitioner is that it only serves to simply divide the soil sample into four parts. After the soil is divided into four parts, it can only be scooped up one by one on the plastic film or kraft paper with a shovel, which is cumbersome to operate, inconvenient to discard the excess soil, and inconvenient to collect the retained part. The above-mentioned improved device has a relatively complex overall structure and requires changing the user's operating habits, which is not conducive to promotion and use.

[0009] Therefore, a new device and / or method is urgently needed to solve the above problems. Utility Model Content

[0010] The invention object of the utility model is to provide a soil sample sampling and reducing device, which is a convenient soil sample quartering and reducing device, can simplify the soil sampling operation, improve the operation efficiency, and has high practical value and application prospect.

[0011] In order to achieve the above purpose, this application adopts the following technical solutions:

[0012] A soil sample sampling and subtraction device, comprising a support unit and a sampling unit, wherein the support unit comprises a first vertical support rod and a first horizontal connecting plate, wherein the first vertical support rod is at least two and arranged parallel to each other, and the first horizontal connecting plate is respectively connected to the first vertical support rod as a whole, and the upper surface of the first horizontal connecting plate constitutes a first support platform;

[0013] The sampling unit is cylindrical with an opening at the upper end, and comprises a second annular side plate and a second horizontal opening and closing component, the second horizontal opening and closing component is circular, the second annular side plate is arranged on the second horizontal opening and closing component, and the second annular side plate and the second horizontal opening and closing component together constitute a second intermediate body, the second intermediate body is arranged on the first supporting platform, and the first supporting platform can provide support for the second intermediate body;

[0014] The second horizontal opening and closing assembly includes a second horizontal bottom plate, a second right-angle connecting plate, a second horizontal connecting rod, and a second torsion spring, and there are four of each of the second right-angle connecting plate, the second horizontal connecting rod, and the second torsion spring;

[0015] The second horizontal bottom plate is circular, and a second horizontal groove matching with the second right-angle connecting plate is arranged at the center of the second horizontal bottom plate, and the second horizontal groove is quadrilateral;

[0016] The second right-angle connecting plate is in the form of a right-angled triangle, and the four side edges of the second horizontal bottom plate close to the center of the second horizontal bottom plate are respectively provided with second horizontal fixing members matched with the second horizontal connecting rod;

[0017] A second right-angle fixing piece matching with the second horizontal connecting rod is arranged on the oblique side of the second right-angle connecting plate;

[0018] The second horizontal connecting rod passes through the second horizontal fixing member and the second right-angle fixing member respectively, the hypotenuse of the second right-angle connecting plate is connected to the second horizontal bottom plate through the second horizontal connecting rod, and the second right-angle connecting plate can rotate relative to the second horizontal bottom plate through the second horizontal connecting rod;

[0019] In the initial state of the second right-angle connecting plate, the right-angle vertex of the second right-angle connecting plate is located at the center of the second horizontal bottom plate;

[0020] The second torsion spring includes a first positioning end abutting against the lower end surface of the second horizontal bottom plate and a second positioning end abutting against the lower end surface of the second right-angle connecting plate;

[0021] The second torsion spring is arranged on the second horizontal connecting rod, and the second right-angle connecting plate can be opened relative to the second horizontal slot under the action of external force through the cooperation between the second horizontal connecting rod and the second torsion spring;

[0022] The first supporting platform is located below the second horizontal bottom plate, and the material on the second horizontal bottom plate can fall onto the first supporting platform through the second right-angle connecting plate.

[0023] The number of the first vertical support rods is 3 to 8, the first vertical support rods are arranged parallel to each other, and the first horizontal connecting plates are respectively connected to the first vertical support rods as a whole.

[0024] The first horizontal connecting plate is polygonal.

[0025] The first horizontal connecting plate is located below the second horizontal bottom plate.

[0026] It also includes a fifth holding bottom plate and a fifth supporting assembly matched with the fifth holding bottom plate, wherein the fifth holding bottom plate is located between the first horizontal connecting plate and the second horizontal bottom plate, and the fifth supporting assembly is composed of a plurality of fifth supporting members, which are arranged on the first vertical support rod in parallel with each other and can provide support for the fifth holding bottom plate;

[0027] The fifth support assembly comprises at least two groups, and the fifth support assembly is arranged along the axial direction of the first vertical support rod;

[0028] Or further comprising a fifth holding bottom plate, the fifth holding bottom plate being located between the first horizontal connecting plate and the second horizontal bottom plate, the first vertical support rod being provided with at least two groups of fifth slot assemblies, the fifth slot assemblies being arranged along the axial direction of the first vertical support rod;

[0029] The fifth card slot assembly is composed of a plurality of fifth containing card slots arranged on the first vertical support rod, and the fifth card slot assembly can provide support for the fifth containing bottom plate.

[0030] There are three first vertical support rods which are arranged in parallel with each other, and a single set of fifth support components is composed of three fifth support members, and the fifth support members are correspondingly arranged on the first vertical support rods;

[0031] Or there are three first vertical support rods which are arranged parallel to each other, a single set of fifth card slot components is composed of three fifth receiving card slots, and the three fifth receiving card slots in the single set of fifth card slot components are correspondingly arranged on the three first vertical support rods.

[0032] It also includes a first containing device for being arranged on the upper end surface of the fifth containing bottom plate.

[0033] The second annular side plate is arranged on the second horizontal bottom plate.

[0034] The second torsion spring further includes a spring body connected to the first positioning end and the second positioning end, and the spring body is sleeved on the second horizontal connecting rod.

[0035] When the second torsion spring is in an initial state, the first positioning end and the second positioning end intersect to form a right angle, and the upper end surface of the second right-angle connecting plate and the upper end surface of the second horizontal bottom plate are located on the same plane.

[0036] The second annular side plate is in a tubular shape with two ends opened, and the bottom end of the second annular side plate is connected to the second horizontal bottom plate as a whole.

[0037] The second intermediate body and the first supporting platform are fixedly connected or movably connected.

[0038] The second intermediate body and the first supporting platform are detachably connected.

[0039] The second horizontal fixing member is C-shaped and the second horizontal connecting rod can be inserted into the C-shaped groove of the second horizontal fixing member and rotate relative to the second horizontal fixing member.

[0040] The second right-angle fixing member is C-shaped and the second horizontal connecting rod can be inserted into the C-shaped groove of the second right-angle fixing member and rotate relative to the second right-angle fixing member.

[0041] There are two second horizontal fixing members on a single side of the second horizontal bottom plate close to the center of the second horizontal bottom plate, and there is one second right-angle fixing member opposite to the side, and the second right-angle fixing member is located between the two second horizontal fixing members;

[0042] Or there is one second horizontal fixing member on a single side of the second horizontal bottom plate close to the center of the second horizontal bottom plate, there are two second right-angle fixing members opposite to the side, and the second horizontal fixing member is located between the two second right-angle fixing members.

[0043] It also includes a flexible shielding member arranged on the second horizontal bottom plate, wherein the flexible shielding member is located on the second horizontal connecting rod and can prevent the material on the second horizontal bottom plate from falling through the gap at the second horizontal connecting rod.

[0044] The flexible shielding member is in sheet shape and is made of rubber.

[0045] The second horizontal bottom plate is provided with scale marks along its radial direction.

[0046] It also includes a plurality of third annular sample dividing pieces, which are in the shape of a circular tube and are arranged on the second horizontal bottom plate.

[0047] Also included is a quadrant that can be placed on the second horizontal base plate.

[0048] The four-divider comprises a first four-divided plate and a second four-divided plate, the first four-divided plate and the second four-divided plate are respectively rectangular, and the first four-divided plate and the second four-divided plate are perpendicular to each other and connected as a whole.

[0049] The four-part device also includes a four-part connecting handle, and the four-part connecting handle is fixedly connected to the four-part first plate.

[0050] The sampling unit is also provided with a four-dividing card slot matched with the four-dividing device.

[0051] The second horizontal groove is in a square shape, the second right-angle connecting plates are respectively in isosceles right-angled triangle shapes, and the center of the second horizontal groove coincides with the center of the circular second horizontal bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of the overall structure of the soil sampling and scaling device in Example 1.

[0053] Figure 2 A top view of the sampling unit.

[0054] Figure 3 This is a three-dimensional diagram of the quadrant.

[0055] Markings in the figure: 1. first vertical support rod, 2. first horizontal connecting plate, 3. second annular side plate, 4. second horizontal bottom plate, 5. second right-angle connecting plate, 6. scale mark, 7. third annular sample dividing piece, 8. first four-divided plate, 9. second four-divided plate, 10. four-divided connecting handle, 11. fifth holding bottom plate. DETAILED DESCRIPTION

[0056] The utility model is described in detail below in conjunction with the accompanying drawings.

[0057] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0058] Example 1

[0059] As shown in the figure, this embodiment provides a soil sample sampling and subtraction device, which includes a support unit and a sampling unit. Among them, the support unit includes a first vertical support rod and a first horizontal connecting plate. There are at least two first vertical support rods and they are arranged parallel to each other. The first horizontal connecting plates are respectively connected to the first vertical support rods as a whole, and the upper surface of the first horizontal connecting plates constitutes a first support platform. In a specific example, the first horizontal connecting plate is triangular; there are three first vertical support rods, which are arranged parallel to each other, and the first horizontal connecting plates are respectively connected to the first vertical support rods as a whole.

[0060] As shown in the figure, the sampling unit is cylindrical with an opening at the upper end. The sampling unit includes a second annular side plate and a second horizontal opening and closing assembly. The second horizontal opening and closing assembly is circular, and the second annular side plate is arranged on the second horizontal opening and closing assembly. The second annular side plate and the second horizontal opening and closing assembly together constitute a second intermediate body. The second intermediate body is arranged on the first supporting platform, and the first supporting platform can provide support for the second intermediate body. In a specific example, the second annular side plate is arranged on the second horizontal bottom plate. Preferably, a detachable connection is adopted between the second intermediate body and the first supporting platform.

[0061] In this embodiment, the second horizontal opening and closing assembly includes a second horizontal bottom plate, a second right-angle connecting plate, a second horizontal connecting rod, and a second torsion spring. There are four second right-angle connecting plates, four second horizontal connecting rods, and four second torsion springs respectively. The second horizontal bottom plate is circular, and a second horizontal groove matching with the second right-angle connecting plate is arranged at the center of the second horizontal bottom plate. The second horizontal groove is a quadrilateral, and the second right-angle connecting plate is a right-angled triangle. In a specific example, the second horizontal groove is a square, and the second right-angle connecting plates are isosceles right-angled triangles respectively. The center of the second horizontal groove coincides with the center of the circular second horizontal bottom plate. A single second right-angle connecting plate, a second horizontal connecting rod, and a second torsion spring constitute a group, and there are four groups in total, and they match with the four sides of the second horizontal groove.

[0062] In this embodiment, the second horizontal fixing members matched with the second horizontal connecting rod are respectively arranged on the four sides of the second horizontal groove, and the second right-angle fixing member matched with the second horizontal connecting rod is arranged on the hypotenuse of the second right-angle connecting plate. The second horizontal connecting rod passes through the second horizontal fixing member and the second right-angle fixing member respectively, and the hypotenuse of the second right-angle connecting plate is connected to the second horizontal bottom plate through the second horizontal connecting rod, and the second right-angle connecting plate can rotate relative to the second horizontal bottom plate through the second horizontal connecting rod. In the initial state of the second right-angle connecting plate, the right-angle vertex of the second right-angle connecting plate is located at the center of the second horizontal bottom plate. In a specific example, the second horizontal fixing member and the second right-angle fixing member are respectively C-shaped, and the second horizontal connecting rod can be inserted into the C-shaped grooves of the second horizontal fixing member and the second right-angle fixing member respectively. There are two second horizontal fixing members on a single side of the second horizontal bottom plate close to the center of the second horizontal bottom plate, and there is one second right-angle fixing member opposite to the side, and the second right-angle fixing member is located between the two second horizontal fixing members; vice versa.

[0063] The second torsion spring includes a first positioning end abutting against the lower end surface of the second horizontal bottom plate and a second positioning end abutting against the lower end surface of the second right-angle connecting plate. The second torsion spring is arranged on the second horizontal connecting rod, and the second right-angle connecting plate can be opened relative to the second horizontal slot under the action of external force through the cooperation of the second horizontal connecting rod and the second torsion spring. The second torsion spring also includes a spring body connected to the first positioning end and the second positioning end, and the spring body is sleeved on the second horizontal connecting rod. With this structure, in the initial state, the first positioning end and the second positioning end intersect at a flat angle, the second right-angle connecting plate relies on the support of the second torsion spring, and the upper end surface of the second right-angle connecting plate is located on the same plane as the upper end surface of the second horizontal bottom plate; at this time, the second horizontal bottom plate and the second right-angle connecting plate together form a complete circular plane, thereby providing support for the operation of the quadrupole. The first support platform is located below the second horizontal bottom plate, and the material on the second horizontal bottom plate can fall on the first support platform through the second right-angle connecting plate. When the user applies external force to the two opposite second right-angle connecting plates, and the applied external force is greater than the reverse supporting force of the second torsion spring, the right-angle vertices of the corresponding second right-angle connecting plates move downward, and a longitudinal opening for soil to fall is formed between the second right-angle connecting plates and the second horizontal groove, so that the soil can fall onto the first supporting platform, thereby completing the diagonal sampling of the soil. In a specific example, the first horizontal connecting plate is located below the second horizontal bottom plate.

[0064] As shown in the figure, it also includes a fifth holding base plate and a fifth supporting assembly matched with the fifth holding base plate, and the fifth holding base plate is located between the first horizontal connecting plate and the second horizontal base plate. In a specific example, the first vertical support rods are three or two, and the three first vertical support rods are arranged parallel to each other. A single fifth supporting assembly is composed of three fifth supporting members located on the same horizontal plane, and the fifth supporting members are correspondingly fixedly arranged on the first vertical support rod. In a specific example, the fifth supporting assembly is three groups, and the three groups of fifth supporting assemblies are arranged along the axial direction of the first vertical support rod. Further, it also includes a first holding device for being arranged on the fifth holding base plate; the first holding device is placed below the second horizontal groove, and is mainly used for quickly collecting soil falling from the second right-angle connecting plate. With this structure, the fifth holding base plate and the fifth supporting assembly form a detachable connection; the fifth holding base plate can be placed on the fifth supporting assembly of different heights as needed, thereby changing the distance between the fifth holding base plate and the second horizontal base plate, thereby meeting the placement requirements of different first holding devices.

[0065] As a variation, it also includes a fifth holding base plate, which is located between the first horizontal connecting plate and the second horizontal base plate, and a plurality of fifth holding slots are provided on the first vertical support rod to provide support for the fifth holding base plate. In a specific example, three fifth holding slots located on the same horizontal plane constitute a group of fifth slot assemblies, and a total of three groups of fifth slot assemblies of different heights are provided. Further, it also includes a first holding device for being provided on the fifth holding base plate. With this structure, the fifth holding base plate and the fifth slot assembly form a detachable connection; the fifth holding base plate can be placed on fifth slot assemblies of different heights as needed, thereby changing the distance between the fifth holding base plate and the second horizontal base plate, thereby meeting the placement requirements of different first holding devices.

[0066] Furthermore, the second horizontal bottom plate is provided with scale marks along its radial direction; and it also includes a plurality of third annular sample dividers, which are in the shape of a circular tube and are arranged on the second horizontal bottom plate. With this structure, the third annular sample dividers with different inner diameters can form cake-shaped soils with different diameters, which is beneficial to the subsequent four-division operation.

[0067] Furthermore, it also includes a four-divider, which can be placed on the second horizontal bottom plate. The four-divider includes a four-divided first plate, a four-divided second plate, and a four-divided connecting handle. The four-divided first plate and the four-divided second plate are respectively rectangular. The four-divided first plate and the four-divided second plate are perpendicular to each other and connected as a whole. The four-divided connecting handle is fixedly connected to the four-divided first plate. Furthermore, the sampling unit is also provided with a four-divided card slot that matches the four-divided device.

[0068] The above structure can prevent soil from falling through the gap at the second horizontal connecting rod in the initial state. Preferably, it also includes a flexible shielding member arranged on the second horizontal bottom plate, which is located on the second horizontal connecting rod and can prevent materials on the second horizontal bottom plate from falling through the gap at the second horizontal connecting rod; the flexible shielding member is sheet-shaped and made of rubber. The flexible shielding member can form a corresponding shielding above the second horizontal connecting rod when the second horizontal connecting rod rotates to prevent soil from falling.

[0069] When the device is working, a soil sample is placed on the second horizontal bottom plate, and after mixing, the soil is divided into four parts using a quadrilateral; an external force is applied to two second right-angle connecting plates at opposite corners, so that the right-angle vertices of the second right-angle connecting plates move downward, the second right-angle connecting plates open downward, and the corresponding soil falls into the first containing device on the fifth containing bottom plate; in this process, the quadrilateral is located on the second horizontal bottom plate, which can play a role in dividing and shielding the soil, thereby preventing the remaining two diagonal soils from falling; when sampling is completed, the external force is removed, the second right-angle connecting plate returns to its initial position, the quadrilateral is removed, the remaining soil in the sampling unit is poured out, and then the soil sample in the first containing device is placed on the second horizontal bottom plate for the next sampling.

[0070] As an alternative, when the device is working, the soil sample is placed on the second horizontal bottom plate, and after mixing, the soil is divided into four parts using a quadrilateral; external force is applied to the two second right-angle connecting plates at the diagonals, so that the right-angle vertices of the second right-angle connecting plates move downward, and the second right-angle connecting plates open downward, and the corresponding soil falls into the first containing device on the fifth containing bottom plate; in this process, the quadrilateral is located on the second horizontal bottom plate, which can play a role in dividing and shielding the soil to prevent the remaining two diagonal soils from falling; when the sampling is completed, the external force is removed, and the second right-angle connecting plates return to their initial position; at this time, the remaining soil in the second horizontal bottom plate is mixed, and the next sampling is carried out.

[0071] The present application designs a soil sample sampling and dividing device composed of a support unit and a sampling unit, which is a quartered working circular table. The soil sample is placed in the sampling unit, mixed, and then pressed into the soil spread in the second horizontal bottom plate along the diagonal quartered slots in the disk using a traditional quartered device to divide the soil sample into four parts, and then the second right-angle connecting plate is pressed down, and the two diagonal second right-angle connecting plates are opened (this is the soil sample outlet on the second horizontal bottom plate), and the excess diagonal soil is released from the opening and discarded, or reserved. The soil in the disk can be mixed again and then divided into four parts.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A soil sample sampling and subtraction device, characterized in that: The invention comprises a support unit and a sampling unit, wherein the support unit comprises a first vertical support rod and a first horizontal connecting plate, wherein the first vertical support rod is at least two and arranged parallel to each other, and the first horizontal connecting plates are respectively connected to the first vertical support rods as a whole, and the upper surface of the first horizontal connecting plates constitutes a first support platform; The sampling unit is cylindrical with an opening at the upper end, and comprises a second annular side plate and a second horizontal opening and closing component, the second horizontal opening and closing component is circular, the second annular side plate is arranged on the second horizontal opening and closing component, and the second annular side plate and the second horizontal opening and closing component together constitute a second intermediate body, the second intermediate body is arranged on the first supporting platform, and the first supporting platform can provide support for the second intermediate body; The second horizontal opening and closing assembly includes a second horizontal bottom plate, a second right-angle connecting plate, a second horizontal connecting rod, and a second torsion spring, and there are four of each of the second right-angle connecting plate, the second horizontal connecting rod, and the second torsion spring; The second horizontal bottom plate is circular, and a second horizontal groove matching with the second right-angle connecting plate is arranged at the center of the second horizontal bottom plate, and the second horizontal groove is quadrilateral; The second right-angle connecting plate is in the form of a right-angled triangle, and the four side edges of the second horizontal bottom plate close to the center of the second horizontal bottom plate are respectively provided with second horizontal fixing members matched with the second horizontal connecting rod; A second right-angle fixing piece matching with the second horizontal connecting rod is arranged on the oblique side of the second right-angle connecting plate; The second horizontal connecting rod passes through the second horizontal fixing member and the second right-angle fixing member respectively, the hypotenuse of the second right-angle connecting plate is connected to the second horizontal bottom plate through the second horizontal connecting rod, and the second right-angle connecting plate can rotate relative to the second horizontal bottom plate through the second horizontal connecting rod; In the initial state of the second right-angle connecting plate, the right-angle vertex of the second right-angle connecting plate is located at the center of the second horizontal bottom plate; The second torsion spring includes a first positioning end abutting against the lower end surface of the second horizontal bottom plate and a second positioning end abutting against the lower end surface of the second right-angle connecting plate; The second torsion spring is arranged on the second horizontal connecting rod, and the second right-angle connecting plate can be opened relative to the second horizontal slot under the action of external force through the cooperation between the second horizontal connecting rod and the second torsion spring; The first supporting platform is located below the second horizontal bottom plate, and the material on the second horizontal bottom plate can fall onto the first supporting platform through the second right-angle connecting plate.

2. The soil sample sampling and subtraction device according to claim 1, characterized in that: The second torsion spring further includes a spring body connected to the first positioning end and the second positioning end, and the spring body is sleeved on the second horizontal connecting rod.

3. The soil sample sampling and subtraction device according to claim 1, characterized in that: When the second torsion spring is in an initial state, the first positioning end and the second positioning end intersect to form a right angle, and the upper end surface of the second right-angle connecting plate and the upper end surface of the second horizontal bottom plate are located on the same plane.

4. The soil sample sampling and subtraction device according to claim 1, characterized in that: The second intermediate body and the first supporting platform are fixedly connected or movably connected.

5. The soil sample sampling and subtraction device according to claim 1, characterized in that: The invention also includes a flexible shielding member arranged on the second horizontal bottom plate, wherein the flexible shielding member is located on the second horizontal connecting rod and can prevent the material on the second horizontal bottom plate from falling through the gap at the second horizontal connecting rod.

6. The soil sample sampling and subtraction device according to claim 1, characterized in that: The second horizontal bottom plate is provided with scale marks along its radial direction.

7. The soil sample sampling and subtraction device according to claim 1, characterized in that: It also includes a plurality of third annular sample dividing pieces, which are in the shape of a circular tube and are arranged on the second horizontal bottom plate.

8. The soil sample sampling and subtraction device according to claim 1, characterized in that: Also included is a quadrant that can be placed on the second horizontal base plate.

9. The soil sample sampling and subtraction device according to claim 8, characterized in that: The sampling unit is also provided with a four-dividing card slot matched with the four-dividing device.

10. The soil sample sampling and subtraction device according to any one of claims 1 to 9, characterized in that: The second horizontal groove is in a square shape, the second right-angle connecting plates are respectively in isosceles right-angled triangle shapes, and the center of the second horizontal groove coincides with the center of the circular second horizontal bottom plate.

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