A soil sample extraction device for soil nutrient detection

Abstract

The invention discloses a soil sample extraction device for soil nutrient detection, comprising a base and a digital display control panel, wherein two support plates are arranged on the base, and an extraction liquid receiving component, an extraction mixing tank and a soil supply tank are arranged between the two support plates from bottom to top, respectively, wherein a fourth motor capable of driving the extraction mixing tank to flip and rotate up and down is arranged on the support plate, a filter plug-in structure is detachably connected to one end of the extraction mixing tank, and liquid adding tanks for providing extraction liquid and cleaning liquid are respectively arranged on both sides of the soil supply tank; through the mutual coordination and cooperation among the extraction liquid receiving component, the extraction mixing tank, the soil supply tank, the liquid adding tank, the supply component, the hydraulic cylinder and the fourth motor, multiple automatic extractions of the same soil sample can be realized, which greatly saves the time of the staff and saves time and labor.

Description

Technical Field

[0001] The invention relates to the technical field of soil sample extraction, and in particular to soil sample extraction equipment for soil nutrient detection. Background Art

[0002] Soil extraction refers to the process of transferring soluble substances in the soil into a suitable solvent. Soil available nutrients refer to nutrients that can be directly absorbed by crops in the current season, including water-soluble nutrients and nutrients adsorbed on soil colloidal particles that are easily exchanged. It affects the physical and chemical properties of the soil. Therefore, its content is an indicator of the intensity of soil nutrient supply. When measuring soil indicators, it is necessary to extract the target components in the soil sample and conduct further experimental operations;

[0003] A soil sample extraction device with application number 201910665901.5, comprising an extraction and filtration mechanism, a vibration mechanism for driving the extraction and filtration mechanism to vibrate, and a rotation drive mechanism for driving the extraction and filtration mechanism to flip; the extraction and filtration mechanism comprises a mixing cylinder, a liquid outlet cylinder and filter paper, the mixing cylinder is provided with a feed inlet, and the liquid outlet cylinder is provided with a liquid outlet;

[0004] A soil sample extraction device with application number 202221716963.8, comprising a storage tank, wherein the inner bottom of the storage tank is movably connected to a driving structure, the outer part of the driving structure is movably connected to a top seat, the outer part of the driving structure is movably connected to a limit plate, the top of the limit plate is snap-connected to a fixed plate, and the driving structure comprises a fixed seat;

[0005] At present, when performing soil sample extraction operations, multiple different control tests are often required for the same soil sample to ensure the accuracy of the measurement. The repetitive operations increase the labor intensity of the staff and are time-consuming and labor-intensive. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] The purpose of the present invention is to provide a soil sample extraction device for soil nutrient detection in order to solve the above problems.

[0008] (II) Technical solution

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] The present invention provides a soil sample extraction device for soil nutrient detection, comprising a base and a digital display control panel, wherein two support plates are arranged on the base, and an extraction liquid receiving component, an extraction mixing tank and a soil supply tank are arranged between the two support plates from bottom to top, respectively, and a fourth motor capable of driving the extraction mixing tank to turn upside down is arranged on the support plate, and a filter plug-in structure is detachably connected to one end of the extraction mixing tank, and liquid adding tanks for providing extraction liquid and cleaning liquid are arranged on both sides of the soil supply tank;

[0011] When the fourth motor drives the leaching and mixing tank to rotate a certain angle, the leaching and mixing tank can cooperate with the soil supply tank to receive the soil sample;

[0012] When the fourth motor drives the leaching mixing tank to rotate another angle, the leaching mixing tank can cooperate with the leaching liquid receiving assembly to filter and sample the leached liquid;

[0013] The outer sides of the leaching liquid receiving assembly, the leaching mixing tank, the soil supply tank and the liquid adding tank are provided with an outer cover shell structure for providing a sealed leaching environment.

[0014] Furthermore, the extraction mixing tank includes a mixing tank body, which has a cylindrical shape. Both sides of the mixing tank body are rotatably arranged between two support plates through a rotating shaft, wherein the shaft end of one of the rotating shafts is connected to the output shaft end of the fourth motor, and a sample connecting tube is arranged on the outer wall of the extraction mixing tank, and an on-off assembly for controlling the on-off of the sample connecting tube is arranged at the sample connecting tube. A slot for plugging and cooperating with a filter plug-in box structure is opened on the outer side of one end of the mixing tank body, and the output end of the digital display control panel is electrically connected to the input end of the fourth motor.

[0015] Furthermore, an extraction chamber is formed inside the mixing tank body, and conical chambers are formed at both ends of the extraction chamber. A first central axis is rotatably arranged in the extraction chamber, and one end of the first central axis is driven to rotate by a second motor fixedly arranged on the mixing tank body. A mixing rib is arranged on the first central axis, and the outer contour of the mixing rib is spiral. A first liquid hole is penetrated between one of the conical chambers and the slot, and a second liquid hole is arranged on the side of the slot away from the first liquid hole. An annular groove is arranged on the mixing tank body near the second liquid hole, and the output end of the digital display control panel is electrically connected to the input end of the second motor.

[0016] Furthermore, the soil supply tank comprises a supply tank body, the interior of the supply tank body is hollow and the upper side is open, a tank cover is provided at the upper side opening of the supply tank body by bolts, a sample adding tube is provided on the tank cover, the upper end of the sample adding tube passes through the outer cover shell structure and is detachably provided with a sealing cover, a supply tube is provided at the bottom of the supply tank body, a supply assembly for extracting soil samples therein and controlling the on-off of the supply tube is provided in the supply tank body, a hydraulic cylinder is fixedly provided on each support plate, support ears corresponding to the hydraulic cylinder are fixedly provided on both sides of the soil supply tank, a push rod head end of the hydraulic cylinder is fixedly connected to the corresponding support ears, and an output end of the digital display control panel is electrically connected to an input end of the hydraulic cylinder;

[0017] When the fourth motor drives the mixing tank body to rotate to an axially horizontal state and the hydraulic cylinder drives the soil supply tank to descend to the lowest position, the supply pipe and the sample receiving pipe are plug-fitted and connected to each other.

[0018] Furthermore, the feeding assembly includes a third motor, the output shaft end of the third motor is connected to one end of the second center shaft, the other end of the second center shaft extends into the feeding pipe, a spiral transmission rib is fixedly provided on the outer side of the second center shaft, a plug is fixedly provided on the outer side of the second center shaft, a sealing ring is provided on the outer side of the plug, the third motor is slidably arranged on the tank cover, a bracket is fixedly provided on the tank cover, a second electric telescopic rod for driving the third motor to slide up and down is fixedly provided on the bracket, and the output end of the digital display control panel is electrically connected to the input end of the second electric telescopic rod and the third motor respectively.

[0019] Furthermore, the filter plug-in structure includes a box body, the outer contour of the box body is in the shape of a circular ring, a conical filter structure is arranged in the box body, the tip of the conical filter structure is facing the second liquid hole, a handle is arranged on the outer wall of the box body, and the box body is threadedly connected with connecting bolts for connecting with the extraction mixing tank.

[0020] Furthermore, the liquid adding tank includes a tank body, the upper end of the tank body is connected to a liquid inlet pipe, the upper end of the liquid inlet pipe passes through the outer cover shell structure, a liquid pump is provided at the bottom of the tank body, the liquid inlet of the liquid pump is communicated with the interior of the tank body, the liquid outlet of the liquid pump is connected to one end of the liquid outlet pipe, the other end of the liquid outlet pipe is connected to the feed pipe, an electromagnetic valve is provided on the liquid outlet pipe, the tank body is fixedly connected to the soil feed tank through a connecting frame, and the output end of the digital display control panel is electrically connected to the input end of the liquid pump and the electromagnetic valve, respectively.

[0021] Furthermore, the extraction liquid receiving component includes a first motor fixedly arranged in the base, the output shaft end of the first motor is connected to a turntable, a clamping column is fixedly arranged at the upper rotation center axis of the turntable, and the outer shape of the clamping column is a regular hexagonal column shape, the extraction liquid receiving component also includes a seat plate, the bottom side of the seat plate is provided with a clamping hole for cooperating with the clamping column, the upper side of the seat plate is provided with a material receiving turntable, a first electric telescopic rod for driving the material receiving turntable to move up and down is provided between the seat plate and the material receiving turntable, a plurality of embedding holes for inserting and placing sample tubes are provided on the outer side of the material receiving turntable along its circumferential direction, and the output end of the digital display control panel is electrically connected to the input end of the first motor.

[0022] Furthermore, the outer cover shell structure includes a cover body, a take-in and put-out opening is opened on one side of the cover body, a sliding cover is arranged at the take-in and put-out opening for upward and downward movement, a transparent plate is arranged on the sliding cover, a handle is arranged on the outer side wall of the sliding cover, and the outer contour of the sliding cover is U-shaped.

[0023] Furthermore, the on-off assembly includes an on-off seat body fixedly arranged on the outer wall of the mixing tank body, a telescopic slide groove is opened in the on-off seat body, an opening and closing plate is movably arranged in the telescopic slide groove, a cylinder for driving the opening and closing plate to move in the telescopic slide groove is fixedly arranged in the telescopic slide groove, when the push rod of the cylinder reaches the maximum stroke, the opening and closing plate can realize the closure of the docking sample tube, and when the push rod of the cylinder reaches the minimum stroke, the opening and closing plate can realize the opening of the docking sample tube, and the output end of the digital display control panel is electrically connected to the input end of the cylinder.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Through the cooperation and coordination between the leaching liquid receiving component, the leaching mixing tank, the soil feeding tank, the liquid adding tank, the feeding component, the hydraulic cylinder and the fourth motor, multiple automatic leaching of the same soil sample can be achieved, which greatly saves the time and effort of the staff;

[0027] 2. The height of the soil feed tank is adjusted by the hydraulic cylinder, the fourth motor drives the extraction mixing tank to rotate, and the first electric telescopic rod drives the material docking turntable to rise and fall, so that the extraction mixing tank can be docked with the extraction liquid receiving assembly and the soil feed tank respectively, and the soil sample receiving and liquid discharge are automated;

[0028] 3. The on-off assembly can achieve the closure of the sample tube when mixing and exporting liquid inside the mixing tank, preventing the liquid from flowing out of the sample tube, and facilitating the subsequent cleaning of the inside of the mixing tank;

[0029] 4. The filter cartridge structure can filter the mixed liquid in the extraction mixing tank, and is convenient for filtering and extracting the extraction liquid into the sample receiving tube of the extraction liquid receiving component. In addition, the filter cartridge structure can be easily disassembled and replaced when different soil samples are extracted. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0032] Figure 2 The present invention Figure 1 AA cross-sectional structural diagram;

[0033] Figure 3 The present invention Figure 2 A schematic diagram of the local enlarged structure at B;

[0034] Figure 4 The present invention Figure 2 A schematic diagram of the local enlarged structure at C;

[0035] Figure 5 The present invention Figure 2 A schematic diagram of the local enlarged structure at D;

[0036] Figure 6 The present invention Figure 2 A schematic diagram of the local enlarged structure at E;

[0037] Figure 7 The present invention Figure 1 Schematic diagram of the three-dimensional structure;

[0038] Figure 8 It is a schematic diagram of the internal first direction three-dimensional structure of the present invention;

[0039] Fig. 9 It is a schematic diagram of the internal second direction three-dimensional structure of the present invention;

[0040] Fig.10 The present invention Fig. 9 Schematic diagram of the local enlarged structure at F.

[0041] The reference numerals are as follows: 1. base; 101. support plate; 2. outer cover shell structure; 201. cover body; 202. slide cover; 203. transparent plate; 204. handle; 3. extraction liquid receiving assembly; 301. first motor; 302. turntable; 303. clamping column; 304. seat plate; 305. clamping hole; 306. material receiving turntable; 307. first electric telescopic rod; 308. embedding hole for pipe; 309. sample receiving tube; 4. extraction mixing tank; 401. mixing tank body; 402. second motor; 403. first central axis; 404. mixing rib; 405. conical chamber; 406. first liquid through hole; 407. second liquid through hole; 408. annular embedding groove; 409. slot; 410. sample receiving tube; 5. soil supply tank; 501. supply tank body ;502, tank cover;503, feed pipe;504, sample adding tube;6, liquid adding tank;601, tank body;602, liquid pump;603, liquid inlet pipe;604, liquid outlet pipe;605, solenoid valve;7, filter cartridge structure;701, cartridge body;702, conical filter structure;703, handle;704, connecting bolt;8, feed assembly;801, third motor;802, second central axis;803, second electric telescopic rod;804, bracket;805, spiral transmission rib;806, plug;807, sealing ring;9, on-off assembly;901, on-off seat;902, telescopic slide;903, cylinder;904, opening and closing plate;10, hydraulic cylinder;11, support ear;12, fourth motor;13, digital display control panel;14, connecting frame. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 1-10 As shown, the present invention provides a soil sample extraction device for soil nutrient detection, including a base 1 and a digital display control panel 13, two support plates 101 are arranged on the base 1, and an extraction liquid receiving component 3, an extraction mixing tank 4 and a soil supply tank 5 are arranged between the two support plates 101 from bottom to top, and a fourth motor 12 capable of driving the extraction mixing tank 4 to turn upside down is arranged on the support plate 101, and a filter plug-in structure 7 is detachably connected to one end of the extraction mixing tank 4, and liquid adding tanks 6 for providing extraction liquid and cleaning liquid are respectively arranged on both sides of the soil supply tank 5;

[0044] When the fourth motor 12 drives the leaching mixing tank 4 to rotate a certain angle, the leaching mixing tank 4 can cooperate with the soil supply tank 5 to receive the soil sample; when the fourth motor 12 drives the leaching mixing tank 4 to rotate another angle, the leaching mixing tank 4 can cooperate with the leaching liquid receiving component 3 to filter and sample the leached liquid;

[0045] See the instruction manual Figure 1 and 7 As shown, an outer cover shell structure 2 for providing a sealed leaching environment is arranged on the outer side of the leaching liquid receiving component 3, the leaching mixing tank 4, the soil supply tank 5 and the liquid adding tank 6. The outer cover shell structure 2 includes a cover body 201, a take-in and put-out opening is provided on one side of the cover body 201, a sliding cover 202 is arranged at the take-in and put-out opening for movement up and down, a transparent plate 203 is arranged on the sliding cover 202, a handle 204 is arranged on the outer wall of the sliding cover 202, and the outer profile of the sliding cover 202 is U-shaped. Through the above structural design, a sealed operating environment can be provided for the leaching of soil samples to avoid external pollution, and the leaching situation can also be observed through the transparent plate 203. When the material receiving turntable 306 of the leaching liquid receiving component 3 is disassembled and taken out, the sliding cover 202 can be slid upward to open, thereby the material receiving turntable 306 can be taken out and put through the take-in and put-out opening.

[0046] See the instruction manual Figure 2 , 6 As shown in Figure 10, the extraction mixing tank 4 includes a mixing tank body 401. The outer shape of the mixing tank body 401 is cylindrical. The two sides of the mixing tank body 401 are rotatably arranged between two support plates 101 through a rotating shaft. The shaft end of one of the rotating shafts is connected to the output shaft end of the fourth motor 12. A sample connecting tube 410 is arranged on the outer wall of the extraction mixing tank 4. An on-off component 9 for controlling the on-off of the sample connecting tube 410 is arranged. A slot 409 for plugging with the filter box structure 7 is opened on the outer side of one end of the mixing tank body 401. The output end of the digital display control panel 13 is electrically connected to the input end of the fourth motor 12.

[0047] An extraction chamber is formed inside the mixing tank body 401, and conical chambers 405 are formed at both ends of the extraction chamber. In actual application, the tips of the two conical chambers 405 are arranged back to back. A first central axis 403 is rotatably arranged in the extraction chamber, and one end of the first central axis 403 is driven to rotate by a second motor 402 fixedly arranged on the mixing tank body 401. A mixing rib 404 is arranged on the first central axis 403, and the outer contour shape of the mixing rib 404 is spiral. A first liquid hole 406 is opened between one of the conical chambers 405 and the slot 409, thereby achieving complete discharge of the liquid inside the mixing tank body 401, and a second liquid hole 407 is opened on the side of the slot 409 away from the first liquid hole 406, and an annular groove 408 is opened on the mixing tank body 401 near the second liquid hole 407, and the output end of the digital display control panel 13 is electrically connected to the input end of the second motor 402. The output shaft of the second motor 402 rotates to drive the first central shaft 403 to rotate, and the first central shaft 403 rotates to drive the mixing ribs 404 to rotate, thereby achieving mixed extraction of the soil sample box extract in the mixing tank 401. When cleaning the inside of the mixing tank 401, the cleaning liquid in one of the liquid adding tanks 6 can be introduced into the mixing tank 401, and the mixing tank 401 can be fully cleaned under the stirring of the mixing ribs 404.

[0048] The soil supply tank 5 includes a supply tank body 501, the interior of the supply tank body 501 is hollow and the upper side is open, and a tank cover 502 is provided at the upper side opening of the supply tank body 501 by bolts, and the tank cover 502 can be removed to clean the inside of the supply tank body 501, and a sample addition tube 504 is provided on the tank cover 502, and the upper end of the sample addition tube 504 passes through the outer cover shell structure 2 and is detachably provided with a sealing cover, and a supply tube 503 is provided at the bottom of the supply tank body 501, and a device for extracting the soil sample therein and controlling the supply tube 503 is provided in the supply tank body 501. The feeding assembly 8 is switched on and off, and a hydraulic cylinder 10 is fixedly arranged on each support plate 101. The two sides of the soil feeding tank 5 are fixedly arranged with support ears 11 corresponding to the hydraulic cylinder 10. The push rod head of the hydraulic cylinder 10 is fixedly connected to the corresponding support ears 11. The output end of the digital display control panel 13 is electrically connected to the input end of the hydraulic cylinder 10. When the fourth motor 12 drives the mixing tank body 401 to rotate to the axial horizontal state and the hydraulic cylinder 10 drives the soil feeding tank 5 to descend to the lowest position, the feeding pipe 503 and the sample receiving pipe 410 are plugged and connected to each other. In practical applications, the sample adding tube 504 can be used to add soil samples, or after each soil sample extraction operation is completed, the sample adding tube 504 can be used to add cleaning water to the feeding tank body 501, thereby achieving the cleaning of the inside of the feeding tank body 501 to avoid affecting the detection of the next soil sample.

[0049] See the instruction manual Figure 3 and4 As shown, the feeding assembly 8 includes a third motor 801, the output shaft end of the third motor 801 is connected to one end of the second central shaft 802, the other end of the second central shaft 802 extends into the feeding tube 503, a spiral transmission rib 805 is fixedly provided on the outer side of the second central shaft 802, a plug column 806 is fixedly provided on the outer side of the second central shaft 802, a sealing ring 807 is provided on the outer side of the plug column 806, the third motor 801 is slidably arranged on the tank cover 502, a bracket 804 is fixedly provided on the tank cover 502, a second electric telescopic rod 803 for driving the third motor 801 to slide up and down is fixedly provided on the bracket 804, and the output end of the digital display control panel 13 is electrically connected to the second electric telescopic rod 803 and the input end of the third motor 801, respectively. In actual applications, the second electric telescopic rod 803 can drive the second central axis 802 to move along its axial direction, thereby driving the position of the adjusting plug 806, so that when the driving plug 806 moves into the feed pipe 503, the feed pipe 503 can be disconnected, and when the feed pipe 503 is moved out, the feed pipe 503 can be connected and opened.

[0050] See the instruction manual Figure 6 , 9 As shown in Figure 10, the filter insert structure 7 includes a box body 701, the outer contour of the box body 701 is in the shape of a ring, a conical filter structure 702 is arranged in the box body 701, the tip of the conical filter structure 702 faces the second liquid hole 407, a handle 703 is arranged on the outer wall of the box body 701, and a connecting bolt 704 for connecting with the leaching and mixing tank 4 is threadedly connected on the box body 701. In practical applications, the connecting bolt 704 can achieve a firm connection between the box body 701 and the leaching and mixing tank 4, and ensure the stability of the box body 701 in the slot 409. In addition, the conical filter structure 702 is made of filter paper material, and the box body 701 can be disassembled and replaced after the soil sample is changed.

[0051] The liquid adding tank 6 includes a tank body 601, the upper end of which is connected to a liquid inlet pipe 603, the upper end of which passes through the outer shell structure 2, a liquid pump 602 is arranged at the bottom of the tank body 601, the liquid inlet of the liquid pump 602 is connected to the inside of the tank body 601, the liquid outlet of the liquid pump 602 is connected to one end of a liquid outlet pipe 604, the other end of the liquid outlet pipe 604 is connected to the feed pipe 503, a solenoid valve 605 is arranged on the liquid outlet pipe 604, the tank body 601 is fixedly connected to the soil feed tank 5 through the connecting frame 14, and the output end of the digital display control panel 13 is electrically connected to the input end of the liquid pump 602 and the solenoid valve 605. Through the above-mentioned specific structural design, one of the liquid adding tanks 6 is used to hold the cleaning liquid, and the other liquid adding tank 6 is used to hold the leaching liquid, so that it can be introduced into the feed pipe 503 for use as needed.

[0052] See the instruction manual Figure 2 As shown, the leaching liquid receiving component 3 includes a first motor 301 fixedly arranged in the base 1, and the output shaft end of the first motor 301 is connected to a turntable 302, and a clamping column 303 is fixedly arranged at the upper rotation center axis of the turntable 302, and the outer shape of the clamping column 303 is a regular hexagonal column shape, and the leaching liquid receiving component 3 also includes a seat plate 304, and the bottom side of the seat plate 304 is provided with a clamping hole 305 for cooperating with the clamping column 303, and the upper side of the seat plate 304 is provided with a material receiving turntable 306, and a first electric telescopic rod 307 for driving the material receiving turntable 306 to move up and down is provided between the seat plate 304 and the material receiving turntable 306, and a plurality of embedding holes 308 for inserting and placing sample tubes 309 are provided on the outer side of the material receiving turntable 306 along its circumferential direction, and the output end of the digital display control panel 13 is electrically connected to the input end of the first motor 301. The first motor 301 drives the material receiving turntable 306 to rotate, thereby enabling different sample receiving tubes 309 to move to the bottom of the second liquid passage hole 407 for containing the filtered soil sample extract.

[0053] The on-off assembly 9 includes an on-off seat body 901 fixedly arranged on the outer wall of the mixing tank body 401, a telescopic slide groove 902 is opened in the on-off seat body 901, an opening and closing plate 904 is movably arranged in the telescopic slide groove 902, and a cylinder 903 is fixedly arranged in the telescopic slide groove 902 for driving the opening and closing plate 904 to move in the telescopic slide groove 902. When the push rod of the cylinder 903 reaches the maximum stroke, the opening and closing plate 904 can realize the closure of the docking sample tube 410, and when the push rod of the cylinder 903 reaches the minimum stroke, the opening and closing plate 904 can realize the opening of the docking sample tube 410. The output end of the digital display control panel 13 is electrically connected to the input end of the cylinder 903.

[0054] Working principle:

[0055] The soil sample to be tested is added into the feed tank 501 through the sample adding tube 504, and the fourth motor 12 drives the mixing tank 401 to rotate a certain angle, so that the axial direction of the mixing tank 401 is in a horizontal position. At this time, the hydraulic cylinder 10 drives the soil feed tank 5 to move downward, so that the feed tube 503 is inserted into the feed tube 503, and the output shaft of the third motor 801 of the feed assembly 8 rotates to drive the second central shaft 802 to rotate, and the second central shaft 802 rotates to drive the spiral transmission rib 805 to rotate, thereby realizing that the spiral transmission rib 805 introduces the soil sample in the soil feed tank 5 into the leaching mixing tank 4, and one of the liquid adding tanks 6 transports the leaching liquid inside it from the feed tube 503 to the mixing tank 401, and the second electric telescopic rod 803 of the feed assembly 8 drives the second central shaft 802 to move in the feed tank 501, and the plug 806 is inserted into the feed tube 503, and the sealing ring 807 realizes the sealing of the feed tube 503;

[0056] The output shaft of the second motor 402 on the leaching and mixing tank 4 rotates, thereby driving the first central shaft 403 to rotate. When the first central shaft 403 rotates, the mixing ribs 404 can be used to mix the inside of the mixing tank body 401. After the mixing is fully leached, the soil supply tank 5 is separated from the leaching and mixing tank 4 by the drive of the hydraulic cylinder 10. The fourth motor 12 drives the mixing tank body 401 to rotate to an axially vertical state until the second liquid hole 407 is set downward, and the first electric telescopic rod 307 drives the material receiving turntable 306 to move upward until the upper port of one of the sample receiving tubes 309 is engaged with the annular embedding groove 408. At this time, the liquid in the leaching and mixing tank 4 falls into the filter plug-in structure 7 for filtration and then flows into the sample receiving tube 309. Repeat the above steps, and the first motor 301 drives the turntable 302 to rotate to replace the sample tube 309 and connect the liquid again. In this way, multiple automatic sampling of the same soil sample can be achieved, avoiding repeated operations by the staff.

[0057] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A soil sample extraction device for soil nutrient detection, characterized in that: The invention comprises a base (1) and a digital display control panel (13), wherein two support plates (101) are arranged on the base (1), and an extraction liquid receiving assembly (3), an extraction mixing tank (4) and a soil supply tank (5) are arranged between the two support plates (101) from bottom to top, respectively; a fourth motor (12) capable of driving the extraction mixing tank (4) to turn upside down and rotate is arranged on the support plate (101), a filter plug-in structure (7) is detachably connected to one end of the extraction mixing tank (4), and liquid adding tanks (6) for providing extraction liquid and cleaning liquid are arranged on both sides of the soil supply tank (5); When the fourth motor (12) drives the leaching and mixing tank (4) to rotate at a certain angle, the leaching and mixing tank (4) can cooperate with the soil supply tank (5) to receive the soil sample; When the fourth motor (12) drives the leaching mixing tank (4) to rotate to another angle, the leaching mixing tank (4) can cooperate with the leaching liquid receiving component (3) to filter and sample the leached liquid; An outer casing structure (2) for providing a sealed leaching environment is arranged on the outer sides of the leaching liquid receiving assembly (3), the leaching mixing tank (4), the soil supply tank (5) and the liquid adding tank (6); The extraction mixing tank (4) comprises a mixing tank body (401), the outer shape of the mixing tank body (401) is cylindrical, the two sides of the mixing tank body (401) are rotatably arranged between two support plates (101) through a rotating shaft, one shaft end of the rotating shaft is connected to the output shaft end of the fourth motor (12), a sample receiving tube (410) is arranged on the outer wall of the extraction mixing tank (4), and an on-off component (9) for controlling the on-off of the sample receiving tube (410) is arranged at the sample receiving tube (410), a slot (409) for plugging and matching with the filter plug-in box structure (7) is opened on the outer side of one end of the mixing tank body (401), and the output end of the digital display control panel (13) is electrically connected to the input end of the fourth motor (12); The soil supply tank (5) comprises a supply tank body (501), the interior of the supply tank body (501) is hollow and the upper side is open, a tank cover (502) is provided at the upper side opening of the supply tank body (501) by means of bolts, a sample addition tube (504) is provided on the tank cover (502), the upper end of the sample addition tube (504) passes through the outer cover shell structure (2) and is detachably provided with a sealing cover, a supply tube (503) is provided at the bottom of the supply tank body (501), and the supply tank body (501) is provided with a plurality of sealing caps. 501) is provided with a feeding assembly (8) for extracting soil samples therein and controlling the on-off of a feeding pipe (503), a hydraulic cylinder (10) is fixedly provided on each support plate (101), and ears (11) corresponding to the hydraulic cylinder (10) are fixedly provided on both sides of the soil feeding tank (5), a push rod head end of the hydraulic cylinder (10) and the corresponding ears (11) are fixedly connected to each other, and an output end of the digital display control panel (13) is electrically connected to an input end of the hydraulic cylinder (10); When the fourth motor (12) drives the mixing tank body (401) to rotate to an axially horizontal state and the hydraulic cylinder (10) drives the soil supply tank (5) to descend to the lowest position, the supply pipe (503) and the sample receiving pipe (410) are plug-fitted and connected to each other; The feeding assembly (8) comprises a third motor (801), the output shaft end of the third motor (801) is connected to one end of a second central shaft (802), the other end of the second central shaft (802) extends into the feeding tube (503), a spiral transmission rib (805) is fixedly provided on the outer side of the second central shaft (802), a plug (806) is fixedly provided on the outer side of the second central shaft (802), a sealing ring (807) is provided on the outer side of the plug (806), the third motor (801) is slidably provided on the tank cover (502), a bracket (804) is fixedly provided on the tank cover (502), a second electric telescopic rod (803) for driving the third motor (801) to slide up and down is fixedly provided on the bracket (804), and the output end of the digital display control panel (13) is electrically connected to the input end of the second electric telescopic rod (803) and the third motor (801), respectively.

2. A soil sample extraction device for soil nutrient detection according to claim 1, characterized in that: An extraction chamber is formed inside the mixing tank body (401), and conical chambers (405) are formed at both ends of the extraction chamber. A first central shaft (403) is rotatably arranged in the extraction chamber, and one end of the first central shaft (403) is driven to rotate by a second motor (402) fixedly arranged on the mixing tank body (401). A mixing rib (404) is arranged on the first central shaft (403), and the outer contour of the mixing rib (404) is spiral-shaped. A first liquid through hole (406) is formed between one of the conical chambers (405) and the slot (409), and a second liquid through hole (407) is formed on the side of the slot (409) away from the first liquid through hole (406). An annular groove (408) is formed on the mixing tank body (401) near the second liquid through hole (407), and the output end of the digital display control panel (13) is electrically connected to the input end of the second motor (402).

3. A soil sample extraction device for soil nutrient detection according to claim 1, characterized in that: The filter cartridge structure (7) comprises a box body (701), the outer contour of the box body (701) is in the shape of a circular ring, a conical filter structure (702) is arranged inside the box body (701), the tip of the conical filter structure (702) faces the second liquid through hole (407), a handle (703) is arranged on the outer wall of the box body (701), and a connecting bolt (704) for connecting with the extraction mixing tank (4) is threadedly connected on the box body (701).

4. A soil sample extraction device for soil nutrient detection according to claim 1, characterized in that: The liquid adding tank (6) comprises a tank body (601), the upper end of the tank body (601) is connected to a liquid inlet pipe (603), the upper end of the liquid inlet pipe (603) passes through the outer casing structure (2), a liquid pump (602) is arranged at the bottom of the tank body (601), the liquid inlet of the liquid pump (602) is communicated with the inside of the tank body (601), the liquid outlet of the liquid pump (602) is connected to one end of a liquid outlet pipe (604), the other end of the liquid outlet pipe (604) is connected to the feed pipe (503), the liquid outlet pipe (604) is provided with a solenoid valve (605), the tank body (601) is fixedly connected to the soil feed tank (5) via a connecting frame (14), and the output end of the digital display control panel (13) is electrically connected to the input end of the liquid pump (602) and the input end of the solenoid valve (605), respectively.

5. The soil sample extraction device for soil nutrient detection according to claim 1, characterized in that: The extraction liquid receiving component (3) comprises a first motor (301) fixedly arranged in the base (1); the output shaft end of the first motor (301) is connected to a turntable (302); a clamping column (303) is fixedly arranged at the rotation center axis on the upper side of the turntable (302); the outer shape of the clamping column (303) is a regular hexagonal column; the extraction liquid receiving component (3) also comprises a seat plate (304); the bottom side of the seat plate (304) is provided with a clamping hole for matching and connecting with the clamping column (303) (305), a material receiving turntable (306) is arranged on the upper side of the base plate (304), a first electric telescopic rod (307) for driving the material receiving turntable (306) to move up and down is arranged between the base plate (304) and the material receiving turntable (306), a plurality of tube embedding holes (308) for inserting and placing sample tubes (309) are opened on the outer side of the material receiving turntable (306) along its circumferential direction, and the output end of the digital display control panel (13) is electrically connected to the input end of the first motor (301).

6. The soil sample extraction device for soil nutrient detection according to claim 1, characterized in that: The outer cover shell structure (2) comprises a cover body (201), a take-in and put-out opening is provided on one side of the cover body (201), a sliding cover (202) is provided at the take-in and put-out opening and is movable up and down, a transparent plate (203) is provided on the sliding cover (202), a handle (204) is provided on the outer side wall of the sliding cover (202), and the outer contour of the sliding cover (202) is U-shaped.

7. The soil sample extraction device for soil nutrient detection according to claim 1, characterized in that: The on-off assembly (9) comprises an on-off seat body (901) fixedly arranged on the outer wall of the mixing tank body (401), a telescopic slide groove (902) being provided in the on-off seat body (901), an opening and closing plate (904) being movably arranged in the telescopic slide groove (902), a cylinder (903) being fixedly arranged in the telescopic slide groove (902) for driving the opening and closing plate (904) to move in the telescopic slide groove (902), when the push rod of the cylinder (903) reaches the maximum stroke, the opening and closing plate (904) can realize the closure of the docking sample tube (410), and when the push rod of the cylinder (903) reaches the minimum stroke, the opening and closing plate (904) can realize the opening of the docking sample tube (410), and the output end of the digital display control panel (13) is electrically connected to the input end of the cylinder (903).

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