CN220251967U - Soil organic matter analyzer - Google Patents

Abstract

The utility model discloses a soil organic matter analyzer, which comprises a sample frame arranged in a machine body, a plurality of titration cup supports arranged on the sample frame in an array manner, a plurality of titration cups connected through the titration cup supports and arranged on the sample frame, a liquid adding titration device, a mechanical clamping jaw and a moving device for driving the mechanical clamping jaw to move. The titration cup support top surface is equipped with at least one first otic placode and at least one second otic placode, and first otic placode and second otic placode dislocation cloth are located titration cup support relative both sides each other, and the first otic placode and the second otic placode of adjacent two adjacent titration cup support adjacent sides are dislocation each other, and mechanical clamping jaw includes and indicates with first otic placode complex first clamp, indicates with second otic placode complex second clamp, and drive first clamp indicates with second clamp indicates relative movement's actuating mechanism. The utility model can carry a plurality of titration cups for detection at one time, and the titration cups can be compactly arranged, thereby being beneficial to improving the detection efficiency of the analyzer, increasing the accommodation amount of the analyzer or reducing the whole size of the analyzer.

Description

Soil organic matter analyzer

Technical Field

The utility model relates to the technical field of chemical instruments, in particular to a soil organic matter analyzer.

Background

The content measurement of organic matters in the soil is used as a project in the physical and chemical analysis of the soil, and the index is an important index for measuring the fertility of the soil. In the laboratory soil organic matter content measurement process, because titration process is loaded down with trivial details, manual titration is wasted time and energy, and the terminal point is judged and is mainly relied on artifical naked eye to observe, and the accuracy is poor. The automatic soil organic matter analyzer releases the experimenter from the complicated soil organic matter detection, and the soil organic matter analyzer is an instrument for analyzing the soil according to the soil organic matter content measurement requirement of a modern laboratory and directly outputting a final organic matter content experimental report of a sample.

The soil organic matter analyzer is used for measuring the organic matter content value of tens or even more soil samples at a time, and the soil organic matter analyzer clamps a test tube filled with the samples from a sample tray through an electric clamping jaw for detection, and the utility model patent with the application number of CN202220693633.5 discloses a colorimetry COD full-automatic detector. In order to facilitate the clamping of the test tubes by the electric clamping jaw, the test tubes on the sample tray are generally arranged in an array, and enough space is reserved between the test tubes to ensure that the electric clamping jaw can be inserted into a gap between the test tubes to clamp the test tubes after being opened. However, because the internal space of the instrument is limited, the space between test tubes is increased, the sample holding capacity of the instrument is sacrificed or the occupied area of a sample tray is increased, the size of the instrument is increased, and the structure of the instrument is not easy to be simplified.

Disclosure of Invention

The utility model aims to provide a soil organic matter analyzer which is used for carrying a plurality of titration cups at a time for detection, and the titration cups can be compactly arranged so as to improve the detection efficiency of the analyzer, increase the accommodation capacity of the analyzer or reduce the overall size of the analyzer.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

a soil organic matter analyzer comprises a machine body, a sample rack, a titration cup support, a liquid adding titration device, a mechanical clamping jaw and a moving device, wherein the sample rack, the titration cup support, the liquid adding titration device, the mechanical clamping jaw and the moving device are arranged in the machine body. Wherein, a plurality of titration cup support has been placed to the array on the sample frame, titration cup support top surface is equipped with at least one first otic placode and at least one second otic placode, and first otic placode and second otic placode dislocation cloth each other locate the relative both sides of titration cup support, and the first otic placode and the second otic placode of adjacent two titration cup support adjacent sides dislocation each other. A plurality of titration cups are connected through titration cup brackets and placed on the sample rack. The mechanical clamping jaw comprises a first clamping finger matched with the first lug plate, a second clamping finger matched with the second lug plate and a driving mechanism for driving the first clamping finger and the second clamping finger to move relatively, and the moving device drives the mechanical clamping jaw to move between the sample frame and the liquid adding titration device.

Preferably, the first ear plate and the second ear plate on two opposite sides of the titration cup support are rotationally symmetrically arranged by taking the center point of the top surface of the titration cup support as a rotation center.

Preferably, the drive mechanism includes a first base, a first rail, a first slider, a second slider, a first gear, a first rack, a second rack, and a first driver. The first driver is arranged on the first base, the first gear is arranged at the output end of the first driver, the first base is provided with first guide rails which are parallel to each other on two opposite sides of the first gear, the first guide rails are provided with first sliding blocks and second sliding blocks, the first clamping fingers are connected with the first sliding blocks on the two first guide rails, the second clamping fingers are connected with the second sliding blocks on the two first guide rails, the first racks are connected with the first clamping fingers and meshed with the first gear, and the second racks are connected with the second clamping fingers and meshed with the second gear.

Preferably, the liquid adding titration device comprises a titration table, a liquid adding table, a graphite digestion component, a liquid adding component arranged on one side of the liquid adding table and a visual titration component arranged on one side of the titration table. The titration bench is provided with a plurality of titration slots for inserting titration cups, and the liquid adding bench is provided with a plurality of liquid adding slots for inserting titration cups.

Preferably, the graphite digestion component comprises a graphite heating seat, heat preservation cotton, a plurality of heating rods and a plurality of temperature sensors. The graphite heating seat is provided with a plurality of heating grooves for inserting the titration cup, the heating rods are in one-to-one correspondence with the heating grooves and are arranged in the graphite heating seat, the temperature sensors are in one-to-one correspondence with the heating grooves and are arranged in the graphite heating seat, and the heat preservation cotton is coated on the outer wall of the graphite heating seat.

Preferably, the liquid adding component comprises a potassium dichromate-sulfuric acid solvent bottle, a pure water solvent bottle, a phenanthroline solvent bottle, a first peristaltic pump, a second peristaltic pump, a first electromagnetic valve, a first injection pump, a moving component and a liquid adding head. The moving assembly drives the liquid adding head to move between the liquid adding slots, the first peristaltic pump is connected with the phenanthroline solvent bottle and the liquid adding head respectively, the second peristaltic pump is connected with the pure water solvent bottle and the liquid adding head respectively, and the first injection pump is connected with the potassium dichromate-sulfuric acid solvent bottle and the liquid adding head respectively through the first electromagnetic valve.

Preferably, the visual titration assembly comprises: the titrant solvent bottle, a plurality of magnetic stirrers, a plurality of rotary swing arms, a plurality of industrial cameras, a plurality of liquid outlet pipes, a plurality of second electromagnetic valves, a plurality of liquid inlet pipes and a plurality of second injection pumps. The titrant solvent bottle is used for containing titrant, the magnetic stirrer is in one-to-one correspondence with the titrant slot and is arranged below the titrant slot, the rotary swing arm is in one-to-one correspondence with the titrant slot and is arranged on one side of the titrant slot, the industrial camera is in one-to-one correspondence with the titrant slot and is arranged on one side of the titrant slot, the liquid outlet pipe is in one-to-one correspondence with the rotary swing arm, one end of the liquid outlet pipe is fixed on the rotary swing arm, the second electromagnetic valve is in one-to-one correspondence with the liquid outlet pipe and is connected with the other end of the liquid outlet pipe, the liquid inlet pipe is in one-to-one correspondence with the second electromagnetic valve, one end of the liquid inlet pipe is connected with the second electromagnetic valve, and the other end is connected with the titrant solvent bottle, and the second injection pump is in one-to-one correspondence with the second electromagnetic valve and is connected.

Preferably, a reflux cover accommodating device is arranged in the machine body, and a plurality of reflux covers connected through reflux cover brackets are accommodated in the reflux cover accommodating device.

Preferably, the reflux cover storage device comprises a second base, a sliding rail, a telescopic bin, a second gear, a third rack and a second driver. The second base is fixedly connected with the machine body, the telescopic bin is used for placing the reflux cover and the reflux cover support, the telescopic bin is in sliding connection with the second base through two sliding rails arranged on two sides of the telescopic bin, the second driver is fixed on the second base, the third rack is fixed on the telescopic bin, and the second gear is fixed at the output end of the second driver and meshed with the third rack.

Preferably, the reflux cover bracket is provided with at least one third lug plate matched with the first clamping finger and at least one fourth lug plate matched with the second clamping finger, the third lug plate and the fourth lug plate are arranged on two opposite sides of the reflux cover bracket in a staggered mode, and when the reflux cover bracket is arranged on the titration cup bracket in a erected mode, the first lug plate and the third lug plate are staggered with each other, and the second lug plate and the fourth lug plate are staggered with each other. The reflux cover comprises an upper funnel part, a lower funnel part, a neck pipe part connected with the necking end of the upper funnel part and the necking end of the lower funnel part, and a cup cover part arranged on the outer wall of the lower funnel part and used for being matched with the cup edge of the titration cup.

By adopting the technical scheme, the utility model has the beneficial effects that:

1. according to the utility model, the titration cup supports are clamped by the mechanical clamping jaw to carry a plurality of titration cups for detection at a time, so that the time for carrying the titration cups back and forth in the whole detection process is greatly shortened, the detection efficiency of the analyzer is improved, the titration cups on each titration cup support can be compactly arranged, the whole size of the analyzer is reduced, or the analyzer can accommodate more titration cups.

2. The grabbing point positions of the titration cup support and the grabbing point positions of the mechanical clamping jaw are not axisymmetrically arranged, so that the mechanical clamping jaw clamps any titration cup support and cannot interfere with other titration cup supports when the titration cup support can be compactly arranged, a reserved space for clamping the titration cup support by the mechanical clamping jaw is not needed, and further the holding capacity of the analyzer is increased or the overall size of the analyzer is reduced.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present utility model.

FIG. 2 is a schematic top view of the titration cup holder of FIG. 1.

FIG. 3 is a schematic perspective view of the titration cup and reflux cap of FIG. 1.

Fig. 4 is a schematic perspective view of the mechanical jaw handling titration cup and reflux cap of fig. 1.

Fig. 5 is a schematic perspective view of the mechanical clamping jaw carrying reflow cover of fig. 1.

Fig. 6 is a schematic perspective view of the mechanical clamping jaw in fig. 1.

Fig. 7 is a schematic bottom view of the mechanical jaw of fig. 6.

Fig. 8 is a schematic perspective view of the graphite digestion module of fig. 1.

Fig. 9 is a schematic perspective view of the liquid adding assembly in fig. 1.

Fig. 10 is a schematic perspective view of the visual titration assembly of fig. 1.

Fig. 11 is a schematic perspective view of the reflow lid storing apparatus in fig. 1.

Wherein: 1. the machine body, 2. The titration cup holder, 21. The first ear plate, 22. The second ear plate, 3. The mechanical clamping jaw, 31. The first clamping finger, 32. The second clamping finger, 33. The drive mechanism, 331. The first base, 332. The first guide rail, 333. The first slide, 334. The second slide, 335. The first gear, 336. The first rack, 337. The second rack, 338. The first drive, 4. The graphite digestion assembly, 41. The graphite heating seat, 42. The heating rod, 43. The temperature sensor, 44. The thermal insulation cotton, 5. The liquid feeding assembly, 51. The potassium dichromate-sulfuric acid solvent bottle, 52. The pure water solvent bottle, 53. The phenanthroline solvent bottle, 54. The first peristaltic, 55. The second peristaltic, 56. The first electromagnetic valve, 57. The first injection pump. 58, moving assembly, 59, liquid adding head, 6, visual titration assembly, 61, titrant solvent bottle, 62, magnetic stirrer, 63, rotary swing arm, 64, industrial camera, 65, drain pipe, 66, second solenoid valve, 67, liquid inlet pipe, 68, second syringe pump, 7, reflux cover receiving device, 71, second base, 72, slide rail, 73, telescopic bin, 74, second gear, 75, third rack, 76, second driver, 8, reflux cover, 81, upper funnel, 82, lower funnel, 83, neck, 84, cup cover, 9, reflux cover holder, 91, third ear plate, 92, fourth ear plate, 10, titration cup, 11, sample holder, 12, moving device, 13, titration table, 14.

Detailed Description

The utility model will be further described with reference to the drawings and detailed description.

As shown in fig. 1, the soil organic matter analyzer of the present embodiment includes: the device comprises a machine body 1, a sample rack 11 arranged in the machine body 1, a titration cup 10, a titration cup support 2, a liquid adding titration device, a mechanical clamping jaw 3, a moving device 12, a reflux cover accommodating device 7, a reflux cover 8 and a reflux cover support 9. A plurality of titration cup holders 2 are arranged on the sample holder 11 in an array, and a plurality of titration cups 10 are connected through the titration cup holders 2 and are arranged on the sample holder 11. The liquid adding titration device is arranged on one side of the sample frame 11, and the reflux cover accommodating device 7 is arranged above the liquid adding titration device and is used for accommodating a plurality of reflux covers 8 connected through the reflux cover bracket 9. The moving device 12 drives the mechanical clamping jaw 3 to move among the sample holder 11, the liquid adding titration device and the reflux cover accommodating device 7 so as to move the titration cup 10 and the reflux cover 8. The moving device 12 can be a mechanical arm or a X, Y, Z three-way linear module.

The grabbing points of the titration cup support 2, the reflux cover support 9 and the mechanical clamping jaw 3 in the embodiment are all arranged in a non-axisymmetric mode, so that the titration cup support 2 is compactly arranged, the inner space of an analyzer is saved, and the mechanical clamping jaw 3 is convenient to grab the titration cup support 2.

Referring to fig. 2, the top surface of the titration cup support 2 in this embodiment is provided with two first ear plates 21 and two second ear plates 22, and the two first ear plates 21 and the two second ear plates 22 are arranged on opposite sides of the titration cup support 2 in a staggered manner, so that when the titration cup supports 2 are compactly arranged together, the first ear plates 21 and the second ear plates 22 on adjacent sides of the two titration cup supports 2 are mutually staggered, and when the mechanical clamping jaw 3 clamps any titration cup support 2, the other titration cup supports 2 are not touched. The first ear plate 21 and the second ear plate 22 on two opposite sides of the titration cup support 2 are preferably rotationally symmetrically arranged by taking the center point O of the top surface of the titration cup support 2 as a rotation center, so that the titration cup support 2 is not differentiated from the front and back, and the titration cup support 2 is conveniently discharged on the sample support 11.

Referring to fig. 4 and 5, the reflow lid bracket 9 of the present embodiment is provided with two third ear plates 91 and two fourth ear plates 92, the two third ear plates 91 and the two fourth ear plates 92 are arranged on opposite sides of the reflow lid bracket 9 in a staggered manner, and when the reflow lid bracket 9 is erected on the titration cup bracket 2, the first ear plates 21 and the third ear plates 91 are staggered with each other, and the second ear plates 22 and the fourth ear plates 92 are staggered with each other.

Referring to fig. 3, the reflow cover 8 of the present embodiment includes: an upper funnel portion 81, a lower funnel portion 82, a neck portion 83 and a cap portion 84. The necking end of the upper funnel part 81 and the necking end of the lower funnel part 82 are connected through a neck pipe part 83, and the outer wall of the lower funnel part 82 is provided with a cup cover part 84 matched with the cup edge of the titration cup 10. The reflux cover 8 of this embodiment can effectively retrieve most and digest volatile material when graphite digestion component 4 heats soil sample and reagent to can cooperate with liquid feeding component 5, wash in order reuse with the pure water.

With reference to fig. 6 and 7, the mechanical clamping jaw 3 of the present embodiment is used for clamping the titration cup holder 2 and the reflux cover holder 9, and comprises: the first and second clamping fingers 31, 32 and the driving mechanism 33 for driving the first and second clamping fingers 31, 32 to move relatively. The driving mechanism 33 includes: a first base 331, a first rail 332, a first slider 333, a second slider 334, a first gear 335, a first rack 336, a second rack 337, and a first driver 338. The first driver 338 is mounted on the first base 331, the first gear 335 is mounted at an output end of the first driver 338, the first base 331 is provided with first guide rails 332 parallel to each other on two opposite sides of the first gear 335, the first guide rails 332 are provided with first sliding blocks 333 and second sliding blocks 334, the first clamping fingers 31 are connected with the first sliding blocks 333 on the two first guide rails 332, the second clamping fingers 32 are connected with the second sliding blocks 334 on the two first guide rails 332, the first racks 336 are connected with the first clamping fingers 31 and meshed with the first gear 335, and the second racks 337 are connected with the second clamping fingers 32 and meshed with the second gear 336.

The liquid adding titration apparatus of this embodiment includes: titration bench 13, liquid feeding bench 14, graphite digestion unit 4, liquid feeding unit 5 located on one side of liquid feeding bench 14, and vision titration unit 6 located on one side of titration bench 13.

Specifically, as shown in fig. 8, the graphite digestion module 4 of the present embodiment includes: graphite heating seat 41, heating rod 42, temperature sensor 43 and heat preservation cotton 44. The graphite heating seat 41 is provided with four heating grooves for inserting the titration cup 10, and the graphite heating seat 41 is provided with a temperature sensor 43 and a heating rod 42 below each heating groove. The graphite digestion component 4 of this embodiment need not the manual operation of laboratory technician, can avoid the high temperature to scald, and compares with traditional oil bath heating, and the graphite digestion component 4 of this embodiment can not pollute titration cup 10, need not the secondary turnover and carries out follow-up titration to the clean titration cup 10 of outer wall, safer environmental protection.

The liquid adding table 14 of this embodiment is provided with four liquid adding slots into which the titration cup 10 is inserted. Referring to fig. 9, the liquid feeding assembly 5 of the present embodiment includes: potassium dichromate-sulfuric acid solvent bottle 51, pure water solvent bottle 52, phenanthroline solvent bottle 53, first peristaltic pump 54, second peristaltic pump 55, first solenoid valve 56, first syringe pump 57, moving assembly 58 and liquid adding head 59. The first peristaltic pump 54 is connected with the phenanthroline solvent bottle 53 and the liquid adding head 59 respectively, the second peristaltic pump 55 is connected with the pure water solvent bottle 52 and the liquid adding head 59 respectively, the first syringe pump 57 is connected with the potassium dichromate-sulfuric acid solvent bottle 51 and the liquid adding head 59 respectively through the first electromagnetic valve 56, the moving component 58 drives the liquid adding head 59 to move between each liquid adding slot so as to add liquid into the titration cup 10 inserted in the liquid adding slot, the moving component 58 can be a linear module or the like, and the moving component 58 of the embodiment comprises: the third guide rail and the fourth rack which are arranged in parallel are arranged, a third sliding block is arranged on the third guide rail, a third base is fixed on the third sliding block, a third motor is fixed on the third base, a third gear which is arranged at the output end of the third motor and meshed with the fourth rack is arranged on the third base, and a liquid adding head 59 is arranged on the third base.

The titration bench 13 is provided with four titration slots for inserting the titration cup 10. With reference to fig. 10, the visual titration assembly 6 of the present embodiment includes: titrant solvent bottle 61, four magnetic stirrers 62, four rotating swing arms 63, four industrial cameras 64, four liquid outlet pipes 65, four second solenoid valves 66, four liquid inlet pipes 65, and four second syringe pumps 68. The titrant of this example is ferrous sulfate solvent. A magnetic stirrer 62 is arranged below each titration slot, a rotary swing arm 63 and an industrial camera 64 are arranged on one side of each titration slot, a liquid outlet pipe 65 is connected to each rotary swing arm 63, each liquid outlet pipe 65 is connected with a second electromagnetic valve 66, each second electromagnetic valve 66 is connected with a second injection pump 68, and each second electromagnetic valve 66 is connected with the titrant solvent bottle 61 through a liquid inlet pipe 67. The conventional visual titration is usually a channel, the visual titration is the longest link consuming time in the whole experimental method, meanwhile, the conventional machine is used for judging the color, and the color sensor is insufficient in precision and sensitivity, so that the color sensor cannot be used for judging stably and effectively when the titration cup 10 contains the interference of the soil particles of the target object. The titration assembly of this embodiment adopts multichannel simultaneous vision to titrate, and synchronous titration need not to wait, and multichannel acceleration titration time improves soil organic matter analysis's efficiency greatly, simultaneously, and industry camera 64 simulation human eye vision judges, compares color sensor and judges more accurately. The injection pump and the peristaltic pump are adopted for liquid adding, so that the liquid adding speed is higher and the precision is higher.

Referring to fig. 11, the reflow lid housing device 7 of the present embodiment includes: a second base 71, a slide rail 72, a telescopic bin 73, a second gear 74, a third rack 75 and a second driver 76. The second base 71 is fixedly connected with the machine body 1, the telescopic bin 73 is used for placing the reflux cover 8 and the reflux cover support 9, the telescopic bin 73 is in sliding connection with the second base 71 through two sliding rails 72 arranged on two sides of the telescopic bin 73, the second driver 76 is fixedly connected with the second base 71, the third rack 75 is fixedly connected with the telescopic bin 73, the second gear 74 is arranged at the output end of the second driver 76 and meshed with the third rack 75, the second driver 76 drives the telescopic bin 73 to extend out of the sliding rails 72 or retract into the second base 71 through the second gear 74 and the third rack 75, and the internal space of the analyzer is effectively utilized through the arrangement of the reflux cover storage device 7, so that the analyzer is miniaturized.

The working principle of the soil organic matter analyzer of this embodiment is as follows:

s1: the experimenter weighs the soil sample with fixed weight through the balance, and place the soil sample in titration cup 10, put into magnetic stirring simultaneously, place titration cup 10 in sample frame 11, place sample frame 11 into the inside appointed region of analysis appearance, the preparation work before accomplishing the sample analysis up to this point.

S2: the moving device 12 moves the mechanical clamping jaw 3 to the position above the titration cup 10, the mechanical clamping jaw 3 grabs the titration cup support 2, and the titration cup support 2 carries four titration cups 10 to move to the liquid adding table 14 together.

S3: a magnetic stirrer 62 can be arranged below the liquid adding table 14 by quantitatively adding potassium dichromate-sulfuric acid solution into the four titration cups 10 through the liquid adding assembly 5, so that the magnetic stirrer rotates synchronously to accelerate the dissolution and uniform mixing of the soil samples.

S4: the mechanical clamping jaw 3 grabs the titration cup support 2, and moves the four titration cups 10 to the graphite digestion assembly 4, and at the moment, the graphite digestion assembly 4 is preheated to 180-190 ℃ in advance.

S5: the reflux cover storage device 7 ejects the reflux cover 8 and the reflux cover bracket 9, the mechanical clamping jaw 3 grabs the reflux cover bracket 9, and the reflux cover bracket 9 carries four reflux covers 8 to move above the graphite digestion component 4 together, so that the reflux cover 8 is covered on the titration cup 10.

S6: after the soil sample and the potassium dichromate-sulfuric acid solution in the titration cup 10 are heated for a period of time through the graphite digestion component 4 until the digestion reaction is complete, the mechanical clamping jaw 3 grabs the titration cup support 2 and moves to the liquid adding table 14 together with the titration cup 10, the reflux cover support 9 and the reflux cover 8.

S7: and a certain volume of pure water is sequentially added into the four titration cups 10 through the liquid adding assembly 5, and the pure water flushes the inner wall of the reflux cover 8 through the reflux cover 8, so that the reflux cover 8 is cleaned.

S8: the mechanical clamping jaw 3 grabs the reflux cover support 9, carries the reflux cover support 9 and the reflux cover 8 back into the reflux cover storage device 7, and meanwhile, the liquid adding assembly 5 sequentially adds a certain volume of phenanthroline indicator into the four titration cups 10.

S9: the mechanical clamping jaw 3 grabs the titration cup support 2, and the titration cup support 2 carries four titration cups 10 to move to the titration table 13 together.

S10: the ferrous sulfate solvent is simultaneously added into the four titration cups 10 through the visual titration assembly 6, the magnetic stirrer 62 drives the magnetic stirrer to rotate at the same time, dripping and mixing of the ferrous sulfate solvent are accelerated, the titration reaction is started, the color of liquid in the titration cups 10 is changed, the industrial camera 64 records and calculates and compares in real time, when the color is reacted to the target color, the titration is finished, the volume of the ferrous sulfate solvent at the moment is recorded, the organic matter content in soil is obtained according to the volume of the ferrous sulfate solvent, the titration reaction of a group of samples is finished, and the process is repeated until the detection of the organic matter content of the whole batch of soil samples is completed.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. A soil organic matter analyzer, comprising: the device comprises a machine body (1), a sample rack (11), a titration cup (10), a titration cup bracket (2), a liquid adding titration device, a mechanical clamping jaw (3) and a moving device (12) which are arranged in the machine body (1); a plurality of titration cup supports (2) are arranged on the sample rack (11) in an array manner, at least one first lug plate (21) and at least one second lug plate (22) are arranged on the top surface of the titration cup supports (2), the first lug plates (21) and the second lug plates (22) are arranged on the opposite sides of the titration cup supports (2) in a staggered manner, and the first lug plates (21) and the second lug plates (22) on the adjacent sides of the titration cup supports (2) are staggered; a plurality of titration cups (10) are connected through titration cup brackets (2) and are placed on a sample rack (11); the mechanical clamping jaw (3) comprises: a first clamping finger (31) matched with the first ear plate (21), a second clamping finger (32) matched with the second ear plate (22), and a driving mechanism (33) for driving the first clamping finger (31) and the second clamping finger (32) to move relatively; the moving device (12) drives the mechanical clamping jaw (3) to move between the sample rack (11) and the liquid adding titration device.

2. The soil organic matter analyzer according to claim 1, wherein the first ear plate (21) and the second ear plate (22) on opposite sides of the titration cup support (2) are rotationally symmetrically arranged with a center point of a top surface of the titration cup support (2) as a rotation center.

3. The soil organic matter analyzer according to claim 1, wherein the driving mechanism (33) includes: a first base (331), a first guide rail (332), a first slider (333), a second slider (334), a first gear (335), a first rack (336), a second rack (337) and a first driver (338); the first driver (338) install on first base (331), first gear (335) install the output in first driver (338), first base (331) install first guide rail (332) that are parallel to each other respectively in first gear (335) opposite both sides, first guide rail (332) on install first slider (333) and second slider (334), first clamp finger (31) be connected with first slider (333) on two first guide rails (332), second clamp finger (32) be connected with second slider (334) on two first guide rails (332), first rack (336) be connected with first clamp finger (31) and mesh with first gear (335), second rack (337) be connected with second clamp finger (32) and mesh with second gear (74).

4. The soil organic matter analyzer of claim 1, wherein the liquid-adding titration device comprises: the device comprises a titration table (13), a liquid adding table (14), a graphite digestion component (4), a liquid adding component (5) arranged on one side of the liquid adding table (14) and a visual titration component (6) arranged on one side of the titration table (13); the titration bench (13) is provided with a plurality of titration slots for inserting the titration cup (10), and the liquid adding bench (14) is provided with a plurality of liquid adding slots for inserting the titration cup (10).

5. The soil organic matter analyzer of claim 4, wherein the graphite digestion assembly (4) comprises:

a graphite heating seat (41) provided with a plurality of heating grooves for inserting the titration cup (10);

the heating rods (42) are arranged in the graphite heating seats (41) and correspond to the heating grooves one by one;

a plurality of temperature sensors (43) which are arranged in the graphite heating seat (41) and are in one-to-one correspondence with the heating grooves;

and the heat preservation cotton (44) is coated on the outer wall of the graphite heating seat (41).

6. The soil organic matter analyzer according to claim 4, wherein the liquid adding assembly (5) comprises: a potassium dichromate-sulfuric acid solvent bottle (51), a pure water solvent bottle (52), a phenanthroline solvent bottle (53), a first peristaltic pump (54), a second peristaltic pump (55), a first electromagnetic valve (56), a first injection pump (57), a moving component (58) and a liquid adding head (59);

the movable assembly (58) drives the liquid adding head (59) to move among the liquid adding slots, the first peristaltic pump (54) is connected with the phenanthroline solvent bottle (53) and the liquid adding head (59) respectively, the second peristaltic pump (55) is connected with the pure water solvent bottle (52) and the liquid adding head (59) respectively, and the first injection pump (57) is connected with the potassium dichromate-sulfuric acid solvent bottle (51) and the liquid adding head (59) respectively through the first electromagnetic valve (56).

7. The soil organic matter analyzer as claimed in claim 4, wherein,

the visual titration assembly (6) comprises:

a titrant solvent bottle (61) for holding a titrant;

a plurality of magnetic stirrers (62) which are in one-to-one correspondence with the titration slots and are arranged below the titration slots;

a plurality of rotary swing arms (63) which are in one-to-one correspondence with the titration slots and are arranged on one side of the titration slots;

a plurality of industrial cameras (64) which are in one-to-one correspondence with the titration slots and are arranged on one side of the titration slots;

a plurality of liquid outlet pipes (65) which are in one-to-one correspondence with the rotary swing arms (63), wherein one end of each liquid outlet pipe (65) is fixed on each rotary swing arm (63);

the second electromagnetic valves (66) are in one-to-one correspondence with the liquid outlet pipes (65), and the second electromagnetic valves (66) are connected with the other ends of the liquid outlet pipes (65);

a plurality of liquid inlet pipes (67) are in one-to-one correspondence with the second electromagnetic valves (66), one end of each liquid inlet pipe (67) is connected with the corresponding second electromagnetic valve (66), and the other end of each liquid inlet pipe is connected with the titrant solvent bottle (61);

and a plurality of second injection pumps (68) are in one-to-one correspondence with and connected with the second electromagnetic valves (66).

8. The soil organic matter analyzer according to claim 1, further comprising a backflow cover accommodating device (7) arranged in the machine body (1), wherein a plurality of backflow covers (8) connected through backflow cover brackets (9) are accommodated in the backflow cover accommodating device (7).

9. The soil organic matter analyzer according to claim 8, wherein the return cover receiving device (7) includes: the device comprises a second base (71), a sliding rail (72), a telescopic bin (73), a second gear (74), a third rack (75) and a second driver (76);

the second base (71) and organism (1) fixed connection, flexible storehouse (73) be used for placing backward flow lid (8) and backward flow lid support (9), flexible storehouse (73) through set up in two slide rails (72) of its both sides and second base (71) sliding connection, second driver (76) be fixed in on second base (71), third rack (75) be fixed in on flexible storehouse (73), second gear (74) be fixed in the output of second driver (76) and with third rack (75) meshing.

10. The soil organic matter analyzer according to claim 8, wherein the back flow cover support (9) is provided with at least one third ear plate (91) matched with the first clamping finger (31) and at least one fourth ear plate (92) matched with the second clamping finger (32), the third ear plate (91) and the fourth ear plate (92) are arranged on opposite sides of the back flow cover support (9) in a staggered manner, and when the back flow cover support (9) is erected on the titration cup support (2), the first ear plate (21) and the third ear plate (91) are staggered with each other, and the second ear plate (22) and the fourth ear plate (92) are staggered with each other;

the reflow cover (8) includes: the automatic titration device comprises an upper funnel part (81), a lower funnel part (82), a neck pipe part (83) and a cup cover part (84), wherein the necking end of the upper funnel part (81) is connected with the necking end of the lower funnel part (82) through the neck pipe part (83), and the cup cover part (84) matched with the cup edge of the titration cup (10) is arranged on the outer wall of the lower funnel part (82).