A soil cation exchange capacity detection and analysis method and detection system

Abstract

The invention discloses a soil cation exchange capacity detection and analysis system, comprising a multi-phase shaking mechanism including an oscillating ring body that can oscillate up and down, wherein the inner circle of the oscillating ring body is a through hole that penetrates up and down, and the inner wall longitudinal section profile of the through hole is an arc shape convex to the axis of the oscillating ring body; and also comprising a plurality of centrifuge tube shaking brackets distributed in a circular array along the axis of the oscillating ring body; each of the centrifuge tube shaking brackets includes an arc-shaped strip body, and each of the arc-shaped strip bodies passes through the through hole; based on the centrifuge tubes of the invention being horizontally shaken back and forth along the axis of the oscillating ring body in a positive and negative rotation, each of the centrifuge tubes oscillates up and down with the center of the arc-shaped strip body while also swinging back and forth around the center of the arc-shaped strip body.

Description

Technical Field

[0001] The invention belongs to the field of soil detection. Background Art

[0002] Soil cation exchange capacity refers to the total amount of various cations that soil colloids can absorb. Cations in the soil can react with hexaamminecobalt trichloride, and the absorbance of hexaamminecobalt trichloride solution is proportional to its solubility. The soil cation exchange capacity can be calculated based on the difference in absorbance before and after immersion in hexaamminecobalt trichloride solution.

[0003] Whether the hexaamminecobalt trichloride solution fully reacts with the soil sample is the guarantee of the detection accuracy. Therefore, it is necessary to design a more efficient shaking mechanism to make the soil sample and the hexaamminecobalt trichloride solution react and absorb more fully and efficiently. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a soil cation exchange capacity detection and analysis method and detection system with higher absorption efficiency during the shaking process.

[0005] Technical solution: To achieve the above purpose, a soil cation exchange capacity detection and analysis system of the present invention comprises a nylon sieve, a plurality of centrifuge tubes, a multiphase shaking device, a centrifuge and a colorimetric tube;

[0006] The steps include:

[0007] Step 1: Pass the air-dried soil sample through a nylon sieve and mix thoroughly;

[0008] Step 2: Weigh 3.5 g of the mixed soil sample and put it into a 100 ml centrifuge tube;

[0009] Step 3, add 50 ml of hexaamminecobalt trichloride solution into each centrifuge tube and seal each centrifuge tube;

[0010] Step 4, placing each centrifuge tube in a multiphase shaking device, and shaking the multiphase shaking device at 20° C. for at least 1 hour;

[0011] Step 5: Take out each centrifuge tube that has been shaken for more than 1 hour, put it into a centrifuge and centrifuge it at 4000r / min for 10 minutes, collect the supernatant in a colorimetric tube, and complete the colorimetric analysis within 12 hours.

[0012] When the multiphase shaking device shakes the centrifuge tube, the movement of the centrifuge tube is synthesized by three movements of synchronous lateral shaking, longitudinal oscillation and rotational shaking.

[0013] Furthermore, the multiphase shaking device comprises a device housing, and the multiphase shaking mechanism is inside the device housing;

[0014] The multi-phase shaking mechanism includes an oscillating ring body that can oscillate up and down, the inner ring of the oscillating ring body is a through hole that passes through from top to bottom, and the longitudinal section profile of the inner wall of the through hole is an arc-shaped convex toward the axis of the oscillating ring body; it also includes a plurality of centrifuge tube shaking brackets distributed in a circular array along the axis of the oscillating ring body; each of the centrifuge tube shaking brackets includes an arc-shaped strip body, and each of the arc-shaped strip bodies passes through the through hole; the inner diameter of the arc-shaped strip body is consistent with the outer diameter of the longitudinal section profile of the inner wall of the through hole, and the inner arc surface of each of the arc-shaped strip bodies slides and fits on the inner wall of the through hole along the longitudinal section profile of the inner wall; each The upper and lower ends of the arc-shaped strip body are respectively fixedly connected with an upper ring and a lower ring, and the upper ring and the lower ring are coaxial; the middle section outer arc surface of each arc-shaped strip body is arrayed with a plurality of transmission teeth along the arc direction; it also includes an axis column with a cross section of a regular polygon passing through the through hole coaxially, and a plurality of vertical side surfaces of the outer circumference of the axis column correspond to each of the arc-shaped strip bodies, and a plurality of vertical side surfaces of the outer circumference of each of the axis columns are integrally provided with transmission racks along the vertical direction, each transmission rack corresponds to a arc-shaped strip body, and each of the transmission racks is meshed with a plurality of transmission teeth on the corresponding arc-shaped strip body;

[0015] The lower end of each centrifuge tube is a conical bottom with the tip facing downward, the upper collar is coaxially sleeved on the upper end of the centrifuge tube, and the lower collar is coaxially sleeved on the outer wall of the conical bottom of the centrifuge tube;

[0016] The up and down oscillating displacement of the oscillating ring body relative to the axis column can drive the center of each of the arc-shaped strip bodies to oscillate up and down, and under the meshing transmission of the transmission rack, each of the arc-shaped strip bodies can rotate back and forth along its own center of circle, so that the centrifuge tubes sleeved on the upper ring and the lower ring can oscillate up and down with the center of the arc-shaped strip body while also swinging back and forth around the center of the arc-shaped strip body.

[0017] Furthermore, the inner wall of the lower collar is a conical surface that fits with the outer wall of the conical bottom of the centrifuge tube.

[0018] Furthermore, the smooth inner wall of the through hole is coated with grease, so that the inner arc surface of the arc-shaped strip body and the inner wall of the through hole can slide smoothly relative to each other.

[0019] Furthermore, the multi-phase shaking mechanism also includes a horizontal regular polygonal fixed bracket; the outer periphery of the regular polygonal fixed bracket is fixed to the inner wall of the device shell; a bearing sleeve is fixed to the inner side of the regular polygonal fixed bracket coaxially through a fixed arm, and a central rotating shaft is arranged in the bearing sleeve through the bearing coaxially rotating; the upper end of the central rotating shaft is coaxially connected to the lower end of the axis column in an integrated manner, and the outer periphery of the oscillation ring body is coaxially fixedly connected to a horizontal ring body platform through a plurality of bracket arms, and the lower side of the ring body is fixedly connected to a plurality of vertical guide rods extending downward in a circular array; a spring bracket extending in a radial direction is fixedly connected to the central rotating shaft in a circular array, and a vertically penetrating guide rod through hole is provided at the end of each spring bracket, and the lower end of each vertical guide rod is respectively coaxially movable through each guide rod through hole; so that on the basis of synchronous rotation of the ring body platform with the central rotating shaft, the ring body platform can also be relatively displaced with the central rotating shaft along the axial direction;

[0020] Each of the vertical guide rods is sleeved with a spring, and several springs elastically support the ring platform upward; the upper surface of the ring platform is provided with several arc-shaped protrusions distributed in a circular array, and each of the arc-shaped protrusions is correspondingly matched with a roller for rolling, and the axis of each roller is perpendicularly intersected with the axis of the oscillating ring body, and each roller is rotatably mounted on a roller shaft through a bearing, and each roller shaft is fixedly connected to the regular polygonal fixed bracket through several vertical brackets, so that the position of each roller is fixed; the ring platform rotates back and forth along its own axis to make each roller roll back and forth over the corresponding arc-shaped protrusion, so that the ring platform oscillates up and down under the action of several springs.

[0021] Furthermore, the lower end of the central rotating shaft is integrally connected with a transmission gear coaxially.

[0022] Furthermore, a motor capable of forward and reverse output is fixedly mounted on the lower side of the regular polygonal fixed bracket; an output end of the motor is connected to an output gear, and the output gear is meshed with the transmission gear, thereby driving the central rotating shaft to rotate forward and reversely.

[0023] Further, a working method of a multiphase shaking device of a soil cation exchange capacity detection and analysis system:

[0024] The output gear is controlled to drive the transmission gear, so that the central rotating shaft rotates back and forth periodically.

[0025] Beneficial effect: On the basis of the centrifuge tubes of the present invention being horizontally shaken back and forth along the axis of the oscillating ring body, each centrifuge tube oscillates up and down with the center of the arc-shaped strip body and also swings back and forth around the center of the arc-shaped strip body; thereby, the centrifuge tubes are subjected to a mixed shaking and oscillation effect synthesized by multi-phase motions such as lateral shaking, longitudinal shaking and rotational shaking. This mixed shaking and oscillation effect synthesized by multi-phase motions is more uniform and efficient than simple shaking or oscillation in the same direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 It is a structural schematic diagram of a multiphase shaking device;

[0027] Attached Figure 2 For attachment Figure 1 A cross-sectional view of

[0028] Attached Figure 3 For attachment Figure 1 The schematic diagram behind the shell is hidden on the basis of the

[0029] Attached Figure 4 For attachment Figure 3 a first cross-sectional view of

[0030] Attached Figure 5 For attachment Figure 3 a second cross-sectional view of

[0031] Attached Figure 6 This is a schematic diagram of the centrifuge tube shaking support structure;

[0032] Attached Figure 7 It is a schematic diagram of the explosion of the multiphase shaking device;

[0033] Attached Figure 8 For attachment Figure 7 An enlarged schematic diagram of the mark 5;

[0034] Attached Fig. 9 For attachment Figure 7 An enlarged schematic diagram of the mark 4;

[0035] Attached Fig.10 For attachment Figure 7 An enlarged schematic diagram of the mark 3;

[0036] Attached Fig.11 For attachment Figure 7 An enlarged schematic diagram of the mark 2;

[0037] Attached Fig.12 For attachment Fig.11 sectional view of . DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] As attached Figures 1 to 12 A soil cation exchange capacity detection and analysis system shown includes a nylon sieve, a plurality of centrifuge tubes 10, a multiphase shaking device 80, a centrifuge and a colorimetric tube;

[0040] The steps include:

[0041] Step 1: Pass the air-dried soil sample through a nylon sieve and mix thoroughly;

[0042] Step 2: Weigh 3.5 g of the mixed soil sample and put it into a 100 ml centrifuge tube 10;

[0043] Step 3, 50 ml of hexaamminecobalt trichloride solution is added to each centrifuge tube 10, and each centrifuge tube 10 is sealed;

[0044] Step 4, placing each centrifuge tube 10 in a multiphase shaking device 80, and shaking the multiphase shaking device 80 at 20° C. for at least 1 hour;

[0045] Step 5, take out each centrifuge tube 10 that has been shaken for more than 1 hour, put it into a centrifuge and centrifuge it at 4000r / min for 10 minutes, collect the supernatant in a colorimetric tube, and complete the colorimetric analysis within 12 hours;

[0046] When the multiphase shaking device 80 shakes the centrifuge tube 10, the movement of the centrifuge tube 10 is synthesized by three movements of synchronous lateral shaking, longitudinal oscillation and rotational shaking.

[0047] The specific structure of the multiphase shaking device 80 is as follows:

[0048] The multiphase shaking device 80 comprises a device housing 7, and a multiphase shaking mechanism 6 is disposed inside the device housing 7;

[0049] The multiphase shaking mechanism 6 includes an oscillating ring body 12 that can oscillate up and down, the inner circle of the oscillating ring body 12 is a through hole 16 that passes through from top to bottom, and the inner wall longitudinal section profile 9 of the through hole 16 is an arc-shaped convex to the axis of the oscillating ring body 12; it also includes a plurality of centrifuge tube shaking brackets 3 distributed in a circular array along the axis of the oscillating ring body 12; each centrifuge tube shaking bracket 3 includes an arc-shaped strip body 15, and each arc-shaped strip body 15 passes through the through hole 16; the inner diameter of the arc-shaped strip body 15 is consistent with the outer diameter of the inner wall longitudinal section profile 9 of the through hole 16, and the inner arc surface 15.1 of each arc-shaped strip body 15 slides along the inner wall longitudinal section profile 9 and fits on the inner wall of the through hole 16; each arc-shaped The upper and lower ends of the strip body 15 are respectively fixedly connected with an upper ring 13 and a lower ring 33, and the upper ring 13 and the lower ring 33 are coaxial; the middle section outer arc surface of each arc-shaped strip body 15 is arrayed with a plurality of transmission teeth 34 along the arc direction; it also includes an axis column 14 with a cross section of a regular polygon passing through the through hole 16 coaxially, and a plurality of vertical side surfaces of the outer circumference of the axis column 14 correspond to each arc-shaped strip body 15, and a plurality of vertical side surfaces of the outer circumference of each axis column 14 are integrally provided with transmission racks 34 along the vertical direction, and each transmission rack 34 corresponds to a circular arc-shaped strip body 15, and each transmission rack 34 is meshed with a plurality of transmission teeth 34 on the corresponding circular arc-shaped strip body 15;

[0050] The lower end of each centrifuge tube 10 is a conical bottom 10.1 with the tip facing downward, the upper collar 13 is coaxially sleeved on the upper end of the tube body of the centrifuge tube 10, and the lower collar 33 is coaxially sleeved on the outer wall of the conical bottom 10.1 of the centrifuge tube 10;

[0051] The up and down oscillating displacement of the oscillating ring body 12 relative to the shaft column 14 can drive the center of each arc-shaped strip body 15 to oscillate up and down, and under the meshing transmission of the transmission rack 34, each arc-shaped strip body 15 can rotate back and forth along its own center of circle, so that the centrifuge tube 10 sleeved on the upper ring 13 and the lower ring 33 can oscillate up and down with the center of the arc-shaped strip body 15 while also swinging back and forth around the center of the arc-shaped strip body 15.

[0052] The inner wall of the lower collar 33 is a conical surface that fits with the outer wall of the conical bottom 10 . 1 of the centrifuge tube 10 .

[0053] The smooth inner wall of the through hole 16 is coated with grease, so that the inner arc surface 15 . 1 of the arc-shaped strip body 15 and the inner wall of the through hole 16 can slide relatively smoothly.

[0054] The multi-phase shaking mechanism 6 also includes a horizontal regular polygonal fixed bracket 31; the outer periphery of the regular polygonal fixed bracket 31 is fixed to the inner wall of the device housing 7; the inner side of the regular polygonal fixed bracket 31 is coaxially fixed with a bearing sleeve 29 through a fixed arm, and a central rotating shaft 32 is provided in the bearing sleeve 29 through the bearing coaxial rotation; the upper end of the central rotating shaft 32 is coaxially connected to the lower end of the shaft column 14, and the outer periphery of the oscillating ring body 12 is coaxially fixedly connected with a horizontal ring body platform 28 through a plurality of bracket arms 17. A plurality of vertical guide rods 23 extending downward are fixedly connected to the lower side of the ring body platform 28 in a circumferential array; a spring bracket 24 extending in a radial direction is fixedly connected to the central rotating shaft 32 in a circumferential array, and a vertically penetrating guide rod through hole 35 is provided at the end of each spring bracket 24, and the lower end of each vertical guide rod 23 is respectively coaxially movable through each guide rod through hole 35; thereby, the ring body platform 28 can rotate synchronously with the central rotating shaft 32, and the ring body platform 28 can also be relatively displaced with the central rotating shaft 32 along the axial direction;

[0055] Each vertical guide rod 23 is sleeved with a spring 21, and the plurality of springs 21 elastically lift the ring platform 28 upward; the upper surface of the ring platform 28 is provided with a plurality of arc-shaped protrusions 20 distributed in a circular array, and each arc-shaped protrusion 20 is correspondingly and rollingly matched with a roller 18, and the axis of each roller 18 is perpendicularly intersected with the axis of the oscillating ring body 12, and each roller 18 is rotatably mounted on a roller shaft 19 through a bearing, and each roller shaft 19 is fixedly connected to a regular polygonal fixed bracket 31 through a plurality of vertical brackets 22, so that the position of each roller 18 is fixed; the ring platform 28 rotates back and forth along its own axis to enable each roller 18 to roll back and forth over the corresponding arc-shaped protrusion 20, so that the ring platform 28 oscillates up and down under the action of the plurality of springs 21.

[0056] In this embodiment, the lower end of the central rotating shaft 32 is coaxially connected with the transmission gear 30 .

[0057] A motor 25 capable of forward and reverse output is fixedly mounted on the lower side of the regular polygonal fixed bracket 31 of this embodiment; an output end of the motor 25 is connected to an output gear 26, which meshes with a transmission gear 30, thereby driving the central rotating shaft 32 to rotate forward and reversely back and forth.

[0058] The working method and working principle of the multiphase shaking device 80 are as follows:

[0059] A plurality of centrifuge tubes 10 waiting to be shaken are respectively sleeved on the upper sleeve rings 13 and the lower sleeve rings 33 of the plurality of centrifuge tube shaking racks 3; then the output gear 26 is controlled to drive the transmission gear 30, so that the central rotating shaft 32 is periodically rotated back and forth in a positive and negative direction; the positive and negative rotation of the central rotating shaft 32 will drive the shaft column 14, each spring bracket 24, each vertical guide rod 23, the ring body platform 28, each bracket arm 17, the oscillating ring body 12, each centrifuge tube shaking rack 3 and each shaken centrifuge tube 10 to synchronously rotate back and forth in a positive and negative direction along the axis of the oscillating ring body 12;

[0060] Since the positions of the rollers 18 are fixed, the ring platform 28 rotates back and forth along its own axis to make the rollers 18 roll back and forth over the corresponding arc-shaped protrusions 20, so that the ring platform 28 oscillates up and down under the action of the springs 21, and the oscillating ring body 12 is completely synchronized with the ring platform 28, so the oscillating ring body 12 will oscillate up and down, so that the oscillating ring body 12 and the shaft column 14 rotate synchronously along the axis, and the oscillating ring body 12 is up and down relative to the shaft column 14. The arc-shaped strips 15 are oscillated and displaced, and the centers of the arc-shaped strips 15 are oscillated and displaced up and down. Under the meshing transmission of the transmission rack 34, the arc-shaped strips 15 are rotated back and forth along their own centers, so that the centrifuge tubes 10 sleeved on the upper ring 13 and the lower ring 33 are oscillated and displaced up and down along the centers of the arc-shaped strips 15, and are also swung back and forth around the centers of the arc-shaped strips 15. At the same time, the centrifuge tubes 10 that have been shaken well are horizontally shaken back and forth along the axis of the oscillating ring 12.

[0061] In summary, the final effect of the periodic forward and reverse rotation of the central rotating axis 32 is that on the basis of the centrifuge tube 10 shaking horizontally along the axis of the oscillation ring body 12, each centrifuge tube 10 oscillates up and down with the center of the arc-shaped strip 15 while also swinging back and forth around the center of the arc-shaped strip 15; thereby, the centrifuge tube 10 is subjected to a mixed shaking and oscillation effect synthesized by multi-phase motions such as lateral shaking, longitudinal oscillation and rotational shaking. This mixed shaking and oscillation effect synthesized by multi-phase motion is more uniform and efficient than simple shaking or oscillation in the same direction.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A soil cation exchange capacity detection and analysis system, characterized in that: It comprises a nylon sieve, a plurality of centrifuge tubes (10), a multiphase shaking device (80), a centrifuge and a colorimetric tube; The steps include: Step 1: Pass the air-dried soil sample through a nylon sieve and mix thoroughly; Step 2: Weigh 3.5 g of the mixed soil sample and put it into a 100 ml centrifuge tube (10); Step 3, 50 ml of hexaamminecobalt trichloride solution is added to each centrifuge tube (10), and each centrifuge tube (10) is sealed; Step 4, placing each centrifuge tube (10) in a multiphase shaking device (80), and shaking the multiphase shaking device (80) at 20° C. for at least 1 hour; Step 5, take out each centrifuge tube (10) that has been shaken for more than 1 hour, put it into a centrifuge and centrifuge it at 4000r / min for 10 minutes, collect the supernatant in a colorimetric tube, and complete the colorimetric analysis within 12 hours; When the multiphase shaking device (80) shakes the centrifuge tube (10), the movement of the centrifuge tube (10) is synthesized by three movements of synchronously performing horizontal shaking, vertical oscillation, and rotational shaking; The multiphase shaking device (80) comprises a device housing (7), wherein the multiphase shaking mechanism (6) is located within the device housing (7); The multiphase shaking mechanism (6) comprises an oscillating ring body (12) capable of oscillating up and down, the inner ring of the oscillating ring body (12) is a through hole (16) that passes through from top to bottom, and the inner wall longitudinal section profile (9) of the through hole (16) is an arc shape convex toward the axis of the oscillating ring body (12); it also comprises a plurality of centrifuge tube shaking brackets (3) distributed in a circular array along the axis of the oscillating ring body (12); each of the centrifuge tube shaking brackets (3) comprises an arc-shaped strip body (15), and each of the arc-shaped strip bodies (15) passes through the through hole (16); the inner diameter of the arc-shaped strip body (15) is consistent with the outer diameter of the inner wall longitudinal section profile (9) of the through hole (16), and the inner arc surface (15.1) of each of the arc-shaped strip bodies (15) slides along the inner wall longitudinal section profile (9) and fits on the inner wall of the through hole (16); The upper and lower ends of each of the arc-shaped strip bodies (15) are respectively fixedly connected to an upper sleeve ring (13) and a lower sleeve ring (33), and the upper sleeve ring (13) and the lower sleeve ring (33) are coaxial; the outer arc surface of the middle section of each of the arc-shaped strip bodies (15) is arrayed with a plurality of transmission teeth (34) along the arc direction; and it also includes an axis column (14) with a cross section of a regular polygon passing through the through hole (16) coaxially, and a plurality of vertical side surfaces of the outer circumference of the axis column (14) respectively correspond to each of the arc-shaped strip bodies (15), and a transmission rack (34) is integrally arranged on a plurality of vertical side surfaces of the outer circumference of each of the axis columns (14) along the vertical direction, and each transmission rack (34) corresponds to a arc-shaped strip body (15), and each of the transmission racks (34) is meshed with a plurality of transmission teeth (34) on the corresponding arc-shaped strip body (15); The lower end of each centrifuge tube (10) is a conical bottom (10.1) with the tip facing downward, the upper collar (13) is coaxially sleeved on the upper end of the tube body of the centrifuge tube (10), and the lower collar (33) is coaxially sleeved on the outer wall of the conical bottom (10.1) of the centrifuge tube (10); The up-and-down oscillating displacement of the oscillating ring body (12) relative to the shaft column (14) can drive the center of each of the arc-shaped strip bodies (15) to oscillate up and down, and under the meshing transmission of the transmission rack (34), each of the arc-shaped strip bodies (15) can rotate back and forth along its own center of circle, so that the centrifuge tube (10) sleeved on the upper ring (13) and the lower ring (33) can oscillate up and down along the center of the arc-shaped strip body (15) and also swing back and forth around the center of the arc-shaped strip body (15).

2. A soil cation exchange capacity detection and analysis system according to claim 1, characterized in that: The inner wall of the lower collar (33) is a conical surface that fits the outer wall of the conical bottom (10.1) of the centrifuge tube (10).

3. A soil cation exchange capacity detection and analysis system according to claim 2, characterized in that: The smooth inner wall of the through hole (16) is coated with lubricating grease, so that the inner arc surface (15.1) of the arc-shaped strip body (15) and the inner wall of the through hole (16) can slide smoothly relative to each other.

4. A soil cation exchange capacity detection and analysis system according to claim 3, characterized in that: The multi-phase shaking mechanism (6) further comprises a horizontal regular polygonal fixed bracket (31); the outer periphery of the regular polygonal fixed bracket (31) is fixed to the inner wall of the device housing (7); a bearing sleeve (29) is coaxially fixed to the inner side of the regular polygonal fixed bracket (31) via a fixed arm, and a central rotating shaft (32) is coaxially rotatably arranged in the bearing sleeve (29) via a bearing; the upper end of the central rotating shaft (32) is coaxially connected to the lower end of the shaft column (14), and the outer periphery of the oscillating ring body (12) is coaxially fixedly connected to a horizontal ring body platform (28) via a plurality of bracket arms (17). A plurality of vertical guide rods (23) extending downward are fixedly connected to the lower side of the ring body platform (28) in a circumferential array; a spring bracket (24) extending in a radial direction is fixedly connected to the central rotating shaft (32) in a circumferential array, and a vertically penetrating guide rod through hole (35) is provided at the end of each spring bracket (24); the lower end of each vertical guide rod (23) is coaxially movable through each guide rod through hole (35); thereby, on the basis of synchronous rotation of the ring body platform (28) with the central rotating shaft (32), the ring body platform (28) and the central rotating shaft (32) can also be relatively displaced along the axial direction; A spring (21) is sleeved on each of the vertical guide rods (23), and the plurality of springs (21) elastically lift the annular platform (28) upward; the upper surface of the annular platform (28) is provided with a plurality of arc-shaped protrusions (20) distributed in a circumferential array, and each of the arc-shaped protrusions (20) is correspondingly and rollingly matched with a roller (18), and the axis of each roller (18) is perpendicularly intersected with the axis of the oscillating ring body (12); each roller (18) is rotatably mounted on a roller shaft (19) via a bearing, and each roller shaft (19) is fixedly connected to the regular polygonal fixed bracket (31) via a plurality of vertical brackets (22), so that the position of each roller (18) is fixed; the annular platform (28) rotates back and forth along its own axis to enable each roller (18) to roll back and forth over the corresponding arc-shaped protrusion (20), so that the annular platform (28) oscillates up and down under the action of the plurality of springs (21).

5. A soil cation exchange capacity detection and analysis system according to claim 4, characterized in that: The lower end of the central rotating shaft (32) is integrally connected to a transmission gear (30) coaxially.

6. A soil cation exchange capacity detection and analysis system according to claim 5, characterized in that: A motor (25) capable of outputting forward and reverse rotations is fixedly mounted on the lower side of the regular polygonal fixed bracket (31); an output end of the motor (25) is connected to an output gear (26), and the output gear (26) meshes with the transmission gear (30), thereby driving the central rotating shaft (32) to rotate forward and reversely.

7. The working method of the multiphase shaking device (80) of the soil cation exchange capacity detection and analysis system according to claim 6 is characterized by: The output gear (26) is controlled to drive the transmission gear (30), so that the central rotating shaft (32) rotates back and forth periodically in a positive and negative direction.

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