Continuous feeding device for marine sediment macroelement determination and working method thereof

Abstract

The invention discloses a continuous feeding device for marine sediment macroelement determination and a working method thereof, and belongs to the field of feeding, the continuous feeding device comprises an experiment bin and a linkage type feeding mechanism, the linkage type feeding mechanism comprises a NaOH feeding unit, a water adding unit and a linkage driving unit, the output end of the linkage driving unit is connected with the NaOH feeding unit and the water adding unit, and the output end of the linkage driving unit is connected with the experiment bin. And the output ends of the NaOH feeding unit and the water feeding unit are communicated with the experiment bin. By adopting the continuous feeding device for measuring the macroelements in the marine sediments and the working method of the continuous feeding device, the continuous quantitative feeding of NaOH and water is realized, the smooth proceeding of subsequent measurement experiments is facilitated, and the continuous feeding device has the advantages of high feeding precision, labor saving and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of feeding, and particularly to a continuous feeding device for determining major elements in marine sediments and its working method. Background Art

[0002] Major elements play a crucial role in marine monitoring and research. By analyzing the characteristics of these elements in detail, scientists can clarify their behavior patterns during geological processes, deeply explore their migration methods, the chemical reaction processes they participate in, and their role as indicators of geological activities. Therefore, accurately determining the major elements in marine sediments becomes particularly important.

[0003] Currently, the alkali fusion-high pressure closed digestion-inductively coupled plasma optical emission spectrometry is commonly used as a simple and efficient monitoring technique for simultaneously determining multiple major elements in sediments. The operation steps of this method include: First, place the marine sediment sample to be measured in a polytetrafluoroethylene inner liner; then, add powdered sodium hydroxide (NaOH) equivalent to 5 to 10 times the volume of the sample and 1 milliliter of pure water; subsequently, heat it under low-temperature conditions between 240 and 280 degrees Celsius to form an alkaline solution environment close to the molten state to promote complete dissolution of the sample; finally, use ICP-OES technology to measure the content of major elements in the sample. In this process, accurately adding sodium hydroxide and water is one of the key steps. For a single sample, this manual operation is acceptable; however, when facing multiple samples, such as processing several or even a dozen samples at a time, such repetitive labor will not only greatly increase the labor cost, but also may cause visual fatigue of the experimental personnel due to frequently performing the same task, thereby increasing the operational risks and uncertainties. In view of this situation, it is particularly urgent to develop a pretreatment device that can achieve continuous and automatic feeding function, which not only helps to improve work efficiency but also effectively reduces potential hazards caused by human factors. By introducing automated equipment to replace the traditional manual feeding method, the safety and accuracy of the detection work of major elements in marine sediments can be significantly improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a continuous feeding device for determining major elements in marine sediments and its working method to solve the above technical problems.

[0005] To achieve the above purpose, the present invention provides a continuous feeding device for determining major elements in marine sediments, including an experimental chamber and a linkage feeding mechanism. The linkage feeding mechanism includes a NaOH feeding unit, a water adding unit, and a linkage driving unit. The output end of the linkage driving unit is respectively connected to the NaOH feeding unit and the water adding unit, and the output ends of the NaOH feeding unit and the water adding unit are communicated with the experimental chamber.

[0006] Preferably, the NaOH feeding unit comprises a first fixed seat and a rotating opening and closing type quantitative feeding component arranged on the first fixed seat; The water adding unit comprises a second fixing seat and a rotating opening and closing type quantitative water adding component arranged on the second fixing seat; A linkage drive unit is also provided on the first fixed seat, which is respectively connected to the rotating opening and closing type quantitative feeding component and the rotating opening and closing type quantitative water adding component. The output ends of the rotating opening and closing type quantitative feeding component and the rotating opening and closing type quantitative water adding component are respectively connected to the experimental chamber through the feeding pipe and the water adding pipe.

[0007] Preferably, the rotating opening and closing quantitative feeding assembly includes a fixed plate fixed to the top of the first fixed seat and a feeding plate horizontally rotatably arranged on the outside of the fixed plate, a plurality of feeding channels evenly arranged in a circular array are provided on the feeding plate above the fixed plate, a feeding groove is provided on the fixed plate, a feeding pipe is provided below the feeding groove, a U-shaped toggle groove is provided on the circumferential side of the bottom end of the feeding plate, the U-shaped toggle groove is connected to the output end of the linkage drive unit, and is used to realize that when the linkage drive unit drives the feeding plate to rotate horizontally until the feeding channel is aligned with the feeding groove, the NaOH in the feeding channel enters the experimental chamber along the feeding groove and the feeding pipe in sequence.

[0008] Preferably, the rotating opening and closing type quantitative water adding component comprises a water storage bin and a quantitative calibration tube arranged below the water storage bin, a water adding tube is arranged below the quantitative calibration tube, and a rotating opening and closing component is arranged between the water storage bin and the quantitative calibration tube and between the quantitative calibration tube and the water adding tube; The outside of the quantitative calibration tube is provided with scale lines.

[0009] Preferably, the rotating opening and closing component includes a rotating plate horizontally rotatably arranged at the bottom end of the water storage bin or the bottom end of the quantitative calibration tube, a drainage channel is provided at the bottom end of the water storage bin or the bottom end of the quantitative calibration tube above the rotating plate, a connecting channel is provided on the rotating plate, and the rotating plate is connected to the output end of the linkage drive unit via a fixed displacement component, so as to realize that the linkage drive unit drives the connecting channel of the rotating plate to align with the drainage channel via the fixed displacement component, so that the water in the water storage bin is discharged into the experimental bin in sequence through the drainage channel of the water storage bin, the connecting channel, the quantitative calibration tube, the drainage channel of the quantitative calibration tube, the connecting channel, and the water filling pipe.

[0010] Preferably, the fixed displacement component comprises a support frame tangentially arranged on the outer wall of the water storage tank or the outer wall of the quantitative calibration tube, a slide plate slidably arranged on the support frame, and a return spring arranged between the slide plate and the support frame, and the slide plate is parallel to the support frame; A driving rack is fixed on one side of the slide away from the water storage bin or the quantitative calibration tube, and a driven rack is fixed on the other side of the slide. The driven rack meshes with a driven arc-shaped tooth segment fixed on the outer circumference of the water storage bin or the outer circumference of the quantitative calibration tube.

[0011] Preferably, the linkage drive unit comprises a linkage drive motor fixed to the first fixed seat via a suspension rod, a turntable fixedly connected to the output shaft of the linkage drive motor, and a switching drive assembly fixed to the outer circumference of the turntable, the switching drive assembly comprises a linear drive plate and an L-shaped drive plate fixed to the outer circumference of the turntable, the linear drive plate and the L-shaped drive plate are both fixed with a driving gear at one end away from the turntable, the driving gear on the linear drive plate is used to mesh with an active rack arranged at the bottom end of the water storage bin, the driving gear on the L-shaped drive plate is used to mesh with an active rack arranged at the bottom end of the quantitative calibration tube, and the driving gear drives the turntable to rotate a distance equal to the distance between the connecting channel and the drainage channel via the active rack, the driven rack and the driven arc-shaped tooth segment; A toggle post is also fixed to the top of one end of the linear drive plate away from the turntable, and the toggle post is adapted to the U-shaped toggle groove.

[0012] Preferably, the linear drive plate and the L-shaped drive plate are arranged symmetrically about the turntable axis, and the toggle column at the top of the linear drive plate is aligned with the U-shaped toggle groove, the driving gear on the linear drive plate is aligned with the active rack at the bottom of the water storage bin, and the driving gear on the L-shaped drive plate is aligned with the active rack at the bottom of the quantitative calibration tube; The linkage driving motor is electrically connected to a switch fixed on the first fixing seat.

[0013] Preferably, the capacity of the feeding channel is ten times the volume of the standard substance of offshore sediment.

[0014] The working method of the continuous feeding device for determining the major elements of marine sediments comprises the following steps: First, turn on the switch to start the linkage drive motor. The linkage drive motor drives the turntable to rotate. During the rotation of the turntable, it drives both the linear drive plate and the L-shaped drive plate to rotate around the turntable until the drive gear on the linear drive plate meshes with the active rack, driving the active rack to move, compressing the return spring. At the same time, it drives the rotating plate at the bottom of the water storage bin to rotate through the driven rack and the driven arc segment, so that the communication channel is connected to the drainage channel at the bottom of the water storage bin. The water in the water storage bin flows into the quantitative calibration tube through the drainage channel and the communication channel. The linkage drive motor drives the turntable to continue rotating until the drive gear disengages from the active rack. The slide plate moves in the reverse direction under the restoring force of the return spring until it resets. At this time, the water flowing into the quantitative calibration tube is 1 ml. The linkage drive motor drives the turntable to continue rotating until the toggle post on the linear drive plate is caught in the U-shaped toggle groove, driving the feeding plate to rotate, so that the feeding channel is aligned with the feeding groove. The quantitative NaOH in the feeding channel enters the experimental chamber through the feeding groove and the feeding tube. At the same time, the driving gear on the L-shaped drive plate meshes with the active rack at the bottom of the quantitative calibration tube, driving the active rack to move, and driving the rotating plate at the bottom of the quantitative calibration tube to rotate through the driven rack and the driven arc segment in sequence, so that the communication channel is connected to the drainage channel at the bottom of the quantitative calibration tube. The water in the quantitative calibration tube flows into the experimental chamber through the drainage channel and the water supply tube in sequence, and then turn off the switch.

[0015] Therefore, by adopting the above continuous feeding device and its working method for the determination of major elements in marine sediments, the beneficial effects are as follows: It realizes the continuous quantitative addition of NaOH and water, facilitating the smooth progress of subsequent determination experiments, and has the advantages of high feeding accuracy, labor saving, etc., improving the safety guarantee during the experiment process.

[0016] Next, through the drawings and embodiments, the technical solutions of the present invention will be further described in detail. Description of the Drawings

[0017] Figure 1 It is the initial state diagram of the continuous feeding device for the determination of major elements in marine sediments of the present invention; Figure 2 It is the working state diagram of the continuous feeding device for the determination of major elements in marine sediments of the present invention; Figure 3 It is Figure 1 The enlarged view at A of Figure 4 It is Figure 1 The enlarged view at B of Figure 5 It is the water adding principle diagram of the continuous feeding device for the determination of major elements in marine sediments of the present invention; Figure 6 It is the structure schematic diagram of the turntable of the continuous feeding device for the determination of major elements in marine sediments of the present invention.

[0018] Reference numerals 1. Switch; 2. First fixed seat; 3. Feeding pipe; 4. Suspension rod; 5. Column; 6. Linkage drive motor; 7. Fixed plate; 8. Feeding channel; 9. Linear drive plate; 10. Output shaft; 11. Turntable; 12. Water storage bin; 13. Conical cylinder structure; 14. Second fixed seat; 15. Water supply pipe; 16. Experiment chamber; 17. Feeding plate; 18. Feeding groove; 19. Central rotating hole; 20. Rotating plate; 21. Quantitative calibration pipe; 22. Connecting channel; 23. Driven arc tooth section; 24. Driving gear; 25. Drainage channel; 26. Driving rack; 27. Poking column; 28. Support frame; 29. Slide plate; 30. Driven rack; 31. L-shaped drive plate; 32. Return spring; 33. U-shaped poking groove. Detailed implementation manners

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0020] The following will describe the implementation manners of the present invention in detail with reference to the drawings.

[0021] As Figures 1-6 shown, a continuous feeding device for determining the major elements of marine sediments includes an experiment chamber 16 and a linkage feeding mechanism. The linkage feeding mechanism includes a NaOH feeding unit, a water adding unit, and a linkage driving unit. The output ends of the linkage driving unit are respectively connected to the NaOH feeding unit and the water adding unit. The output ends of the NaOH feeding unit and the water adding unit are communicated with the experiment chamber 16. The experiment chamber 16 of this embodiment is made of a polytetrafluoroethylene inner liner.

[0022] Among them, the NaOH feeding unit includes a first fixed seat 2 and a rotating opening and closing quantitative feeding component arranged on the first fixed seat 2; the water adding unit includes a second fixed seat 14 and a rotating opening and closing quantitative water adding component arranged on the second fixed seat 14; a linkage driving unit is also provided on the first fixed seat 2, and the linkage driving unit is respectively connected to the rotating opening and closing quantitative feeding component and the rotating opening and closing quantitative water adding component, and the output ends of the rotating opening and closing quantitative feeding component and the rotating opening and closing quantitative water adding component are respectively connected to the experimental chamber 16 through the feeding pipe 3 and the water adding pipe 15.

[0023] Specifically, the rotating opening and closing quantitative feeding assembly includes a fixed plate 7 fixed to the top of the first fixed seat 2 and a feeding plate 17 horizontally rotated and arranged on the outside of the fixed plate 7 through a central rotating hole 19. In this embodiment, the fixed plate 7 is fixed to the first fixed seat 2 through a column 5, and a plurality of feeding channels 8 evenly arranged in a circular array are provided on the feeding plate 17 above the fixed plate 7, a feeding groove 18 is provided on the fixed plate 7, and a feeding pipe 3 is provided below the feeding groove 18, and a U-shaped toggle groove 33 is provided on the circumferential side of the bottom end of the feeding plate 17, and the U-shaped toggle groove 33 is connected to the output end of the linkage drive unit, so as to realize that when the linkage drive unit drives the feeding plate 17 to rotate horizontally until the feeding channel 8 is aligned with the feeding groove 18, the NaOH in the feeding channel 8 enters the experimental chamber 16 along the feeding groove 18 and the feeding pipe 3 in turn.

[0024] The rotating opening and closing quantitative water-adding component includes a water storage tank 12 and a quantitative calibration tube 21 arranged below the water storage tank 12. The end of the bottom of the water storage tank 12 close to the quantitative calibration tube 21 is arranged as a conical cylinder structure 13 for easy drainage. A water-adding pipe 15 is arranged below the quantitative calibration tube 21. Rotating opening and closing components are arranged between the water storage tank 12 and the quantitative calibration tube 21 and between the quantitative calibration tube 21 and the water-adding pipe 15. Scale lines are arranged on the outside of the quantitative calibration tube 21 for calibrating the amount of water added.

[0025] The rotating opening and closing component includes a rotating plate 20 which is horizontally rotatably arranged at the bottom end of the water storage tank 12 or the bottom end of the quantitative calibration tube 21. A drainage channel 25 is provided at the bottom end of the water storage tank 12 or the bottom end of the quantitative calibration tube 21 above the rotating plate 20. A connecting channel 22 is provided on the rotating plate 20. The rotating plate 20 is connected to the output end of the linkage drive unit via a fixed displacement component, so as to realize that the connecting channel 22 of the rotating plate 20 is driven by the linkage drive unit via the fixed displacement component to align with the drainage channel 25, so that the water in the water storage tank 12 is discharged into the experimental tank 16 in sequence through the drainage channel 25 of the water storage tank 12, the connecting channel 22, the quantitative calibration tube 21, the drainage channel 25 of the quantitative calibration tube 21, the connecting channel 22, and the water filling pipe 15.

[0026] The fixed and movable component includes a support frame 28 tangentially arranged on the outer wall of the water storage bin 12 or the outer wall of the quantitative calibration tube 21, a sliding plate 29 slidably arranged on the support frame 28, and a return spring 32 arranged between the sliding plate 29 and the support frame 28. The sliding plate 29 is parallel to the support frame 28; on one side of the sliding plate 29 away from the water storage bin 12 or the quantitative calibration tube 21, a driving rack 26 is fixed, and on the other side of the sliding plate 29, a driven rack 30 is fixed. The driven rack 30 meshes with a driven arc-shaped tooth section 23 fixed on the outer circumferential side of the water storage bin 12 or the outer circumferential side of the quantitative calibration tube 21.

[0027] The linkage drive unit includes a linkage drive motor 6 fixed to the first fixed seat 2 via a suspension rod 4, a turntable 11 fixedly connected to the output shaft 10 of the linkage drive motor 6, and a switching drive assembly fixed on the outer circumferential side of the turntable 11. The switching drive assembly includes a linear drive plate 9 and an L-shaped drive plate 31 fixed on the outer circumferential side of the turntable 11. At the ends of the linear drive plate 9 and the L-shaped drive plate 31 away from the turntable 11, drive gears 24 are fixed. The drive gear 24 on the linear drive plate 9 is used to mesh with the driving rack 26 arranged at the bottom end of the water storage bin 12, and the drive gear 24 on the L-shaped drive plate 31 is used to mesh with the driving rack 26 arranged at the bottom end of the quantitative calibration tube 21. Moreover, the distance that the drive gear 24 drives the rotating plate 20 to rotate through the driving rack 26, the driven rack 30, and the driven arc-shaped tooth section 23 is equal to the distance between the communication channel 22 and the drainage channel 25; at the top of the end of the linear drive plate 9 away from the turntable 11, a toggle post 27 is further fixed, and the toggle post 27 is adapted to a U-shaped toggle groove 33.

[0028] The linear drive plate 9 and the L-shaped drive plate 31 are arranged axially symmetrically with respect to the turntable 11. Moreover, the toggle post 27 at the top end of the linear drive plate 9 is aligned with the U-shaped toggle groove 33, the drive gear 24 on the linear drive plate 9 is aligned with the driving rack 26 at the bottom end of the water storage bin 12, and the drive gear 24 on the L-shaped drive plate 31 is aligned with the driving rack 26 at the bottom end of the quantitative calibration tube 21; the linkage drive motor 6 is electrically connected to a switch 1 fixed on the first fixed seat 2.

[0029] The capacity of the feeding channel 8 is the volume of ten times the mass of the offshore sediment standard substance.

[0030] The working method of the continuous feeding device for determining the major elements of marine sediments includes the following steps: First, turn on switch 1 to start the linkage drive motor 6. The linkage drive motor 6 drives the turntable 11 to rotate. During the rotation of the turntable 11, it drives both the linear drive plate 9 and the L-shaped drive plate 31 to rotate around the turntable 11 until the drive gear 24 on the linear drive plate 9 meshes with the driving rack 26, driving the driving rack 26 to move and compress the return spring 32. At the same time, it drives the rotating plate 20 at the bottom of the water storage bin 12 to rotate through the driven rack 30 and the driven arc tooth section 23, so that the communication channel 22 is connected to the drainage channel 25 at the bottom of the water storage bin 12. The water in the water storage bin 12 flows into the quantitative calibration tube 21 through the drainage channel 25 and the communication channel 22. The linkage drive motor 6 drives the turntable 11 to continue rotating, causing the drive gear 24 to disengage from the driving rack 26. The slide plate 29 moves in the reverse direction under the restoring force of the return spring 32 until it is reset. At this time, the water flowing into the quantitative calibration tube 21 is 1 ml. The linkage drive motor 6 drives the turntable 11 to continue rotating until the toggle post 27 on the linear drive plate 9 is caught in the U-shaped toggle groove 33, driving the feeding plate 17 to rotate, so that the feeding channel 8 is aligned with the feeding groove 18. The quantitative NaOH in the feeding channel 8 enters the experimental chamber 16 through the feeding groove 18 and the feeding pipe 3. At the same time, the driving gear on the L-shaped drive plate 31 meshes with the driving rack 26 at the bottom of the quantitative calibration tube 21, driving the driving rack 26 to move, and then driving the rotating plate 20 at the bottom of the quantitative calibration tube 21 to rotate through the driven rack 30 and the driven arc tooth section 23 in sequence, so that the communication channel 22 is connected to the drainage channel 25 at the bottom of the quantitative calibration tube 21. The water in the quantitative calibration tube 21 flows into the experimental chamber 16 through the drainage channel 25 and the water supply pipe 15 in sequence, and then turn off switch 1.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A continuous feeding device for determining major elements in marine sediments, characterized in that: It includes an experimental chamber and a linkage feeding mechanism, which includes a NaOH feeding unit, a water adding unit and a linkage driving unit. The output end of the linkage driving unit is respectively connected to the NaOH feeding unit and the water adding unit, and the output ends of the NaOH feeding unit and the water adding unit are connected to the experimental chamber.

2. The continuous feeding device for determining the major elements of marine sediments according to claim 1, characterized in that: The NaOH feeding unit comprises a first fixed seat and a rotating opening and closing type quantitative feeding component arranged on the first fixed seat; The water adding unit comprises a second fixing seat and a rotating opening and closing type quantitative water adding component arranged on the second fixing seat; A linkage drive unit is also provided on the first fixed seat, which is respectively connected to the rotating opening and closing type quantitative feeding component and the rotating opening and closing type quantitative water adding component. The output ends of the rotating opening and closing type quantitative feeding component and the rotating opening and closing type quantitative water adding component are respectively connected to the experimental chamber through the feeding pipe and the water adding pipe.

3. The continuous feeding device for determining the major elements of marine sediments according to claim 2, characterized in that: The rotating opening and closing quantitative feeding component includes a fixed plate fixed to the top of the first fixed seat and a feeding plate horizontally rotatably arranged on the outside of the fixed plate. A plurality of feeding channels evenly arranged in a circular array are provided on the feeding plate above the fixed plate, a feeding groove is provided on the fixed plate, a feeding pipe is provided below the feeding groove, a U-shaped toggle groove is provided on the circumferential side of the bottom end of the feeding plate, and the U-shaped toggle groove is connected to the output end of the linkage drive unit, so that when the linkage drive unit drives the feeding plate to rotate horizontally until the feeding channel is aligned with the feeding groove, the NaOH in the feeding channel enters the experimental chamber along the feeding groove and the feeding pipe in sequence.

4. The continuous feeding device for determining the major elements of marine sediments according to claim 3, characterized in that: The rotating opening and closing quantitative water adding component comprises a water storage bin and a quantitative calibration pipe arranged below the water storage bin, a water adding pipe is arranged below the quantitative calibration pipe, and a rotating opening and closing component is arranged between the water storage bin and the quantitative calibration pipe and between the quantitative calibration pipe and the water adding pipe; The outside of the quantitative calibration tube is provided with scale lines.

5. The continuous feeding device for determining the major elements of marine sediments according to claim 4, characterized in that: The rotating opening and closing component includes a rotating plate which is horizontally rotatably arranged at the bottom end of the water storage bin or the bottom end of the quantitative calibration tube. A drainage channel is provided at the bottom end of the water storage bin or the bottom end of the quantitative calibration tube above the rotating plate. A connecting channel is provided on the rotating plate. The rotating plate is connected to the output end of the linkage driving unit via a fixed displacement component, so as to realize that the connecting channel of the rotating plate driven by the linkage driving unit through the fixed displacement component is aligned with the drainage channel, so that the water in the water storage bin is discharged into the experimental bin in sequence through the drainage channel of the water storage bin, the connecting channel, the quantitative calibration tube, the drainage channel of the quantitative calibration tube, the connecting channel, and the water filling pipe.

6. The continuous feeding device for determining the major elements of marine sediments according to claim 5, characterized in that: The fixed moving component includes a support frame tangentially arranged on the outer wall of the water storage tank or the outer wall of the quantitative calibration tube, a slide plate slidably arranged on the support frame, and a return spring arranged between the slide plate and the support frame, and the slide plate is parallel to the support frame; A driving rack is fixed on one side of the slide away from the water storage bin or the quantitative calibration tube, and a driven rack is fixed on the other side of the slide. The driven rack meshes with a driven arc-shaped tooth segment fixed on the outer circumference of the water storage bin or the outer circumference of the quantitative calibration tube.

7. The continuous feeding device for determining the major elements of marine sediments according to claim 6, characterized in that: The linkage drive unit comprises a linkage drive motor fixed to a first fixed seat via a suspension rod, a turntable fixedly connected to an output shaft of the linkage drive motor, and a switching drive assembly fixed to an outer circumferential side of the turntable, the switching drive assembly comprises a linear drive plate and an L-shaped drive plate fixed to an outer circumferential side of the turntable, a driving gear is fixed to one end of the linear drive plate and the L-shaped drive plate away from the turntable, the driving gear on the linear drive plate is used to mesh with an active rack arranged at the bottom end of the water storage bin, the driving gear on the L-shaped drive plate is used to mesh with an active rack arranged at the bottom end of the quantitative calibration tube, and the driving gear drives the turntable to rotate a distance equal to the distance between the connecting channel and the drainage channel via the active rack, the driven rack and the driven arc-shaped tooth segment; A toggle post is also fixed to the top of one end of the linear drive plate away from the turntable, and the toggle post is adapted to the U-shaped toggle groove.

8. The continuous feeding device for determining major elements in marine sediments according to claim 7, characterized in that: The linear drive plate and the L-shaped drive plate are arranged symmetrically about the turntable axis, and the toggle column at the top of the linear drive plate is aligned with the U-shaped toggle groove, the driving gear on the linear drive plate is aligned with the active rack at the bottom of the water storage bin, and the driving gear on the L-shaped drive plate is aligned with the active rack at the bottom of the quantitative calibration tube; The linkage driving motor is electrically connected to a switch fixed on the first fixing seat.

9. The continuous feeding device for determining the major elements of marine sediments according to claim 3, characterized in that: The capacity of the feeding channel is ten times the volume of the offshore sediment standard material.

10. The working method of the continuous feeding device for determining the major elements of marine sediments as claimed in claim 7 or 8, characterized in that: The following steps are involved: First, turn on the switch and start the linkage drive motor. The linkage drive motor drives the turntable to rotate. During the rotation of the turntable, the linear drive plate and the L-shaped drive plate are driven to rotate around the turntable until the driving gear on the linear drive plate is meshed with the active rack, driving the active rack to move, compressing the reset spring, and at the same time driving the rotating plate at the bottom of the water storage bin to rotate through the driven rack and the driven arc-shaped tooth segment, so that the connecting channel is connected with the drainage channel at the bottom of the water storage bin, and the water in the water storage bin flows into the quantitative calibration tube through the drainage channel and the connecting channel. The linkage drive motor drives the turntable to continue to rotate, so that the driving gear is disengaged from the active rack, and the slide plate moves in the opposite direction under the action of the restoring force of the reset spring until it is reset. At this time, the amount of water flowing into the quantitative calibration tube is 1 ml. The linkage drive motor drives the turntable to continue to rotate until the toggle column on the linear drive plate is stuck in the U-shaped toggle groove, driving the feeding plate to rotate, so that the feeding channel is aligned with the feeding groove, and the quantitative NaOH in the feeding channel enters the experimental chamber through the feeding groove and the feeding tube. At the same time, the active gear on the L-shaped drive plate is engaged with the active rack at the bottom end of the quantitative calibration tube, driving the active rack to move, and in turn driving the rotating plate at the bottom end of the quantitative calibration tube to rotate through the driven rack and the driven arc-shaped tooth segment, so that the connecting channel is connected with the drainage channel at the bottom end of the quantitative calibration tube, and the water in the quantitative calibration tube flows into the experimental chamber through the drainage channel and the water adding pipe in turn, and the switch is turned off.

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