Ion membrane automatic pretreatment equipment for soil detection

Abstract

The application discloses an ion membrane automatic pretreatment device for soil detection, which comprises a casing, a shaking and liquid squeezing module, a liquid taking module and a buckle feeding module. The liquid in a container in a clamp can be shaken and mixed by a stepping oscillator. The liquid can be squeezed out of a filter bottle by a stepping squeezing assembly. The squeezed liquid is taken by the liquid taking module and applied to an ion membrane carrier fed by the buckle feeding module. The steps and processes of adsorbing the measured substance in the liquid by the ion membrane are optimized, the processing efficiency is improved, the shaking is closed-loop controlled by a stepping motor, the consistency of the shaking effect is ensured, the consistency of the detection result is improved, the liquid transfer gun head module can be further included, the automatic replacement of the liquid transfer gun head is realized, and thus the whole process only needs manual bottle body feeding and consumable feeding, the rest of the processing processes are operated by the device, the labor intensity is greatly reduced, and the processing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of soil testing equipment technology, and in particular to an automatic ion membrane pretreatment device for soil testing. Background Technology

[0002] Farmland soil testing, as a crucial measure to safeguard farmland resources, ensure agricultural product safety, and improve agricultural efficiency, has received increasing attention and promotion. Among the various factors contributing to this focus are food safety issues and the increased and irrational use of agricultural chemicals. Against this backdrop, farmland soil testing has become a vital task for protecting land resources, the farmland environment, and public health. Ion-exchange membrane adsorption (IEM) technology is a novel technique applied to soil element detection. Since ions in soil are often bound to inorganic or organic matter, their content is difficult to determine directly. IEM technology allows suitable ions to pass through an adsorption membrane, making soil element determination simpler and more reliable. This technology offers numerous advantages: 1. Simple operation: Ion-ion membrane adsorption (IME) technology requires no sample pretreatment, chemical reagents, or advanced equipment. Simply place the sample on the adsorption membrane for adsorption and elution. 2. High detection sensitivity: Due to the good selectivity of the IME, this technology can achieve high detection sensitivity even at relatively low solution concentrations. 3. Accurate and reliable results: Because of the selectivity of the adsorption membrane, only target ions can penetrate the membrane, resulting in accurate and reliable measurement results. 4. High safety: Compared to traditional soil element detection methods, IME technology has less impact on laboratory personnel and the environment, making it safer. Detecting soil element content using IME technology allows for rapid and accurate understanding of soil element levels, providing a scientific basis for precise fertilization, enabling more accurate decision-making, thereby improving crop yield and quality while protecting the soil and environment.

[0003] While ion-exchange membrane adsorption technology offers numerous advantages for soil testing, several issues arise in practical applications: uneven ion absorption affects measurement results; the operation process is cumbersome and labor-intensive; and inconsistent manual operation leads to problems. Common laboratory mixing equipment often employs horizontal or tumbling oscillation structures, driven by DC motors for high-speed centrifugal oscillation. However, in actual use, the ion-exchange membrane flows with the mud, making it impossible to guarantee consistent rotation speed and time, thus affecting the uniformity and saturation of ion adsorption. Sample extraction requires manual pipetting, a cumbersome process prone to errors leading to sample waste and data inaccuracies. Summary of the Invention

[0004] The purpose of this invention is to provide an automated ion-exchange membrane pretreatment device for soil testing, in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: an automatic ion-exchange membrane pretreatment device for soil testing, comprising a housing, and: An oscillating squeezing module includes a stepping oscillator, a stepping squeezing assembly, and a clamp. The clamp is mounted on the stepping oscillator and has at least one positioning slot. A container is placed in the positioning slot. The output end of the stepping squeezing assembly is driven to extend into the clamp and squeeze the container, pushing the liquid inside upwards to the top of the container. The liquid dispensing module includes an X-axis assembly, a first Z-axis assembly, and a liquid suction assembly. The first Z-axis assembly is located at the output end of the X-axis assembly, and the liquid suction assembly is located at the output end of the first Z-axis assembly. A pipette tip is mounted on the lower end of the liquid suction assembly, and is driven to move above the container to aspirate the liquid squeezed to the top of the container. The snap-fit ​​feeding module includes a first Y-axis assembly, a receiving plate, and a hopper. The hopper contains multiple ion membrane carriers stacked together, and a top feeding assembly for feeding a single ion membrane carrier is provided at the lower end. The receiving plate is disposed on the first Y-axis assembly and has at least one cavity. The receiving plate is driven to extend into the lower end of the hopper so that the cavity carries the ion membrane carrier. The ion membrane carrier is used to hold liquid fed by a pipette tip.

[0006] As a further optimization, the container includes a shaking bottle or a filter bottle. When the container is a shaking bottle, an ion membrane carrier is provided on the shaking bottle. When the container is a filter bottle, the filter bottle includes a squeeze bottle body, a filter, and an overflow port connected sequentially from bottom to top. The liquid inside the squeeze bottle body is squeezed upwards and filtered by the filter before entering the overflow port. The overflow port is funnel-shaped to facilitate the insertion of a pipette tip to draw up the liquid.

[0007] As a further optimization, the fixture includes a base plate and a movable plate. The base plate is disposed at the output end of the stepper vibrator, and the positioning groove is formed on the base plate. One end of the base plate is provided with a vertical plate, and the vertical plate is provided with a through hole for the output end of the stepper extrusion assembly to extend into. The movable plate is hinged to the other end of the base plate, and a positioning block for clamping the container is provided between the movable plate and the vertical plate. The movable plate is provided with a first buckle, and the vertical plate is provided with a second buckle. When the movable plate is in a vertical state, the first buckle and the second buckle are engaged, and the positioning block abuts against the container.

[0008] As a further optimization, the stepper extrusion assembly includes a first stepper motor, a first transmission component, a first slider, and an extrusion bracket. The first transmission component is disposed at the output end of the first stepper motor, the first slider is disposed on the first transmission component, and the extrusion bracket is disposed on the first slider for extruding the container.

[0009] As a further optimization, the X-axis assembly includes a second stepper motor, a second transmission component, and a second slider. The second transmission component is disposed at the output end of the second stepper motor, and the second slider is disposed on the second transmission component. The first Z-axis assembly includes a third stepper motor, a third transmission component, and a third slider. The third stepper motor is disposed on the second slider, the third transmission component is disposed at the output end of the third stepper motor, and the third slider is disposed on the third transmission component. The liquid suction component is disposed on the third slider.

[0010] As a further optimization, the liquid aspiration assembly includes a protective shell, a fourth stepper motor, a fourth transmission component, a fourth slider, and a liquid aspiration section. The protective shell is disposed at the output end of the first Z-axis assembly, the fourth stepper motor is disposed on the protective shell, the fourth transmission component is disposed at the output end of the fourth stepper motor, and the fourth slider is disposed on the fourth transmission component. The liquid aspiration section includes a syringe and a piston. The syringe is disposed on the protective shell, the piston is connected to the fourth slider, and its lower end extends into the syringe. The pipette tip is disposed at the lower end of the syringe.

[0011] As a further optimization, the device also includes a liquid level detection sensor, which is mounted on the housing and located next to the oscillating squeezing module. The liquid level detection sensor can detect whether liquid is being drawn into the pipette tip or whether the amount of liquid drawn meets the usage requirements.

[0012] As a further optimization, the first Y-axis assembly includes a fifth stepper motor, a fifth transmission component, and a fifth slider. The fifth transmission component is located at the output end of the fifth stepper motor, the fifth slider is located on the fifth transmission component, the receiving plate is located on the fifth slider, and the receiving plate is provided with a shaping block. The top material assembly includes a solenoid valve and a top material block located at the output end of the solenoid valve. The top material block extends into the material bin and abuts against the side wall of the ion membrane carrier. A heating fan is provided on the housing next to the material bin to facilitate the drying of the liquid on the ion membrane carrier.

[0013] As a further optimization, the device also includes a pipette tip module, which comprises a second Y-axis assembly, a tip holder, and a disengagement head. The tip holder is mounted on the second Y-axis assembly and has multiple limiting holes for positioning the pipette tip. The disengagement head is mounted on the housing. The aspiration assembly, driven by a drive, disengages the upper end of the pipette tip located at its lower end from the disengagement head and then connects it to the pipette tip located on the tip holder. The cooperation between the pipette tip module and the liquid collection module enables automatic pipette tip replacement, improving operational efficiency.

[0014] As a further optimization, the second Y-axis assembly includes a sixth stepper motor, a sixth transmission component, and a sixth slider. The sixth transmission component is disposed at the output end of the sixth stepper motor, the sixth slider is disposed on the sixth transmission component, and the gun head seat is disposed on the sixth slider.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The liquid in the container of the fixture is oscillated and mixed by a stepping oscillator. In particular, for filter bottles, the liquid can be squeezed out by a stepping extrusion component. The squeezed liquid is picked up by the liquid taking module and applied to the ion membrane of the ion membrane carrier fed by the snap-on feeding module. This optimizes the steps and processes of ion membrane adsorption of analytes in liquid and improves processing efficiency. 2. The oscillation is controlled by a stepper motor in a closed loop to ensure consistent oscillation performance and improve the consistency of detection results; 3. After the servo module is used for squeezing and filtering, the two-axis robotic arm drives the nozzle controlled by the stepper motor module to automatically pick up the liquid, which can improve the accuracy of liquid collection. 4. In a specific embodiment, automatic replacement of pipette tips can be achieved. The entire process only requires manual loading and unloading of bottles and consumables, while the rest of the processing is handled by equipment, which greatly reduces labor intensity and improves processing efficiency. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention.

[0017] Figure 2 This is a structural diagram of the invention from the internal front view.

[0018] Figure 3 This is a structural diagram of the invention from the internal rear view.

[0019] Figure 4 This is a structural diagram of the oscillating liquid extrusion module of the present invention.

[0020] Figure 5 This is a structural diagram of the stepper oscillator and fixture of the present invention.

[0021] Figure 6 This is a structural diagram of the clamp of the present invention in the open state.

[0022] Figure 7 This is a structural diagram of the liquid extraction module of the present invention.

[0023] Figure 8 This is a structural diagram of the snap-fit ​​feeding module of the present invention.

[0024] Figure 9 This is a structural diagram of the snap-fit ​​feeding module of the present invention from another side view.

[0025] Figure 10 This is a structural diagram of the pipette tip module of the present invention. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0027] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, an automated ion-exchange membrane pretreatment device for soil testing includes a housing 100 and at least a vibrating squeezing module 200, a liquid collection module 300, and a snap-fit ​​feeding module 400 disposed within the housing 100. The vibrating squeezing module 200 includes a stepping oscillator 21, a stepping extrusion assembly 22, and a clamp 23. The clamp 23 is disposed on the stepping oscillator 21 and has at least one positioning groove 2310. A container is placed in the positioning groove 2310. The container has two forms: a filter bottle 24 or a vibrating bottle 25. The output end of the stepping extrusion assembly 22 is driven to extend into the clamp 23 and squeeze the container (preferably the filter bottle 24) to squeeze the liquid in the container upwards to the upper end of the container. The liquid collection module 300 includes an X-axis assembly 31, a first Z-axis assembly 32, and a liquid suction assembly 33. The first Z-axis assembly 32 is disposed at the output end of the X-axis assembly 31, and the liquid suction assembly 33 is disposed at the output end of the first Z-axis assembly 32. The lower end of the liquid aspiration assembly 33 is equipped with a pipette tip 50, which is driven to move above the container and aspirate the liquid squeezed to the upper end of the container. The snap-fit ​​feeding module 400 includes a first Y-axis assembly 41, a receiving plate 42, and a hopper 44. Multiple ion membrane carriers 40 are stacked in the hopper 44 (the function of the ion membrane carrier 40 is to provide an ion membrane for adsorbing the analyte in the liquid. The structure of the ion membrane carrier 40 can be configured as a pair of snaps clamping the sides of the ion membrane, and at least the upper snap has a through hole through its body for applying liquid to the ion membrane). The lower end is provided with a top feeding assembly 43 for feeding a single ion membrane carrier 40. The receiving plate 42 is disposed on the first Y-axis assembly 41 and is provided with at least one cavity 421. The receiving plate 42 is driven to extend into the lower end of the hopper 400 so that the cavity 421 carries the ion membrane carrier 40. The ion membrane carrier 40 is used to hold the liquid fed by the pipette tip 50.

[0028] In this invention, the oscillating squeezing module 200 is used to oscillate the liquid in the filter bottle 24 or the oscillating bottle 25. Specifically, the filter bottle 24 or the oscillating bottle 25 is placed in the positioning groove 2310 of the clamp 23. The stepper oscillator 21 is driven by a stepper motor, and its structural design allows it to rotate eccentrically, thus driving the clamp 23 to oscillate and mix the liquid in the filter bottle 24 or the oscillating bottle 25. The liquid in the filter bottle 24 or the oscillating bottle 25 after oscillation and mixing has two different post-processing steps: when the container is the oscillating bottle 25, because the oscillating bottle 25 is equipped with a buckle, The ion exchange membrane carrier can be mounted on the shaking bottle 25 using clips for oscillation. After the liquid in the shaking bottle 25 is oscillated and mixed, the process in the entire device is complete. Specifically, when the shaking bottle 25 is used as the container, it only uses the clamp 23 of the oscillation and squeezing module 200 and the stepping oscillator 21 in this device. After oscillation, the shaking bottle 25 is removed, and the oscillated and mixed liquid is applied to the ion exchange membrane carrier fixed by the clips. When the container is a filter bottle 24, after the oscillation and mixing action is completed by the stepping oscillator 21, the output end of the stepping squeezing assembly 22 can be driven to extend into the clamp 23. The filter bottle 24 is squeezed to push the liquid inside upwards to its upper end. Since the filter bottle 24 comprises a squeeze bottle body 243, a filter 242, and an overflow port 241 connected sequentially from bottom to top, the liquid inside the squeeze bottle body 243, after being squeezed upwards, is filtered by the filter 242 and enters the overflow port 241. This process prevents impurities from entering the overflow port 241. The liquid dispensing module 300 is used to dispensing liquid from the filter bottle 24. Its X-axis assembly 31 and the first Z-axis assembly 32 cooperate to drive the liquid suction assembly 33 and the pipette tip 50 along the X-axis. The pipette tip 50 moves to the top of the filter bottle 24 and downwards along Z. Driven by the aspiration assembly 33, the pipette tip 50 aspirates the liquid in the overflow port 241. The overflow port 241 can be configured to be funnel-shaped to facilitate the free end of the pipette tip 50 to extend into the overflow port 241. Preferably, after the aspiration assembly 33 drives the pipette tip 50 to aspirate the liquid in the overflow port 241, the liquid level does not exceed the upper end of the pipette tip 50 (i.e., the liquid is entirely inside the pipette tip 50). In this way, the liquid does not enter the aspiration assembly 33, so that only the pipette tip 50 needs to be replaced when aspirating different liquids.The snap-fit ​​feeding module 400 is used to feed the ion membrane carrier 40 and, in conjunction with the liquid extraction module 300, applies the extracted liquid onto the ion membrane carrier 40. The first Y-axis assembly 41 of the snap-fit ​​feeding module 400 drives the receiving plate 42 to move along the Y direction and extend below the hopper 44, so that the cavity 421 on the receiving plate 42 is located below the hopper 44. The ejector assembly 43 actuates to cause an ion membrane carrier 40 to fall into the cavity 421, and, driven by the first Y-axis assembly 41, moves the ion membrane carrier 40 to the outside of the hopper 44. This, in conjunction with the X-axis assembly 300 and the first Y-axis assembly 400, the liquid extraction module 300... A Z-axis assembly 32 drives the pipette tip 50 to move along the X and Z directions respectively, and then the liquid aspiration assembly 33 drives the liquid in the pipette tip 50 to be applied to the ion membrane carrier 40 (specifically, the ion membrane). This is used for the ion membrane to adsorb the analyte in the liquid, facilitating subsequent testing (such as testing after manual removal). Preferably, a heating fan 104 is provided on the side of the material hopper 44 on the housing 100. The heating fan 104 heats and dries the liquid on the ion membrane carrier 40 in the cavity 421 of the receiving plate 42, so that the analyte is retained only on the ion membrane.

[0029] In this invention, the liquid in the container of the clamp 23 can be oscillated and mixed by the stepping oscillator 21. In particular, the liquid can be squeezed out by the stepping extrusion assembly 22 for the filter bottle 24, and then the liquid is picked up by the liquid taking module 300 and applied to the ion membrane on the ion membrane carrier 40 fed by the snap-on feeding module 400. This optimizes the steps and process of the ion membrane adsorbing the analyte and can improve the processing efficiency.

[0030] Preferred, combined Figure 10As shown, to improve processing efficiency, the pipette tip 50 can be quickly replaced after applying liquid to the ion membrane carrier 40 for the transfer of other liquids. Simultaneously, since the clamp 23 has multiple (e.g., four) positioning slots 2310 arranged side-by-side, and the matching receiving plate 42 has multiple acupoints 421 arranged side-by-side to support multiple ion membrane carriers 40 respectively, the device also includes a pipette tip module 500. The pipette tip module 500 includes a second Y-axis assembly 51, a tip holder 52, and a stripping head 105. The tip holder 52 is disposed on the second Y-axis assembly 51 and has multiple limiting holes 520 for positioning the pipette tip 50. The pipette tip 50 is placed in the limiting holes 520, and the stripping head 105... The dispensing head 105 is mounted on the housing 100. The aspiration assembly 33, driven by the X-axis assembly 31 and the first Z-axis assembly 32, brings the upper end of the pipette tip 50 inserted at its lower end into contact with the lower end of the dispensing head 105. Then, driven by the first Z-axis assembly 32, it moves upward, causing the pipette tip 50 to detach from the aspiration assembly 33 and fall into the waste pipette tip compartment 1051 located inside the housing 100. The aspiration assembly 33, driven by the X-axis assembly 31 and the first Z-axis assembly 32, and in conjunction with the second Y-axis assembly 51, drives the movement of the pipette tip holder 52, allowing the lower end of the aspiration assembly 33 to extend into the upper part of one of the pipette tips 50 for insertion. Through the above actions, the replacement of the pipette tip 50 is completed. It should be noted that the aforementioned liquid aspiration assembly 33 and pipette tip holder 52 are mated and connected by the X-axis assembly 31, the first Z-axis assembly 32, and the second Y-axis assembly 51, driven together in the X / Y / Z three-dimensional space. Therefore, the liquid aspiration assembly 33 can be inserted into the pipette tips 50 within the limiting holes 520 on the pipette tip holder 52. This embodiment of the invention enables automatic feeding and replacement of pipette tips 50, meeting the needs of different liquids and multiple containers for varying numbers of ion-exchange membrane carriers 40, thus improving processing efficiency.

[0031] like Figures 4 to 6As shown, the clamp 23 includes a base plate 231 and a movable plate 232. The base plate 231 is disposed at the output end of the stepper vibrator 21. A positioning groove 2310 is formed on the base plate 231. One end of the base plate 231 is provided with a vertical plate 2311. The vertical plate 2311 is provided with a through hole 2300 for the output end of the stepper extrusion assembly 22 to extend into. The movable plate 232 is connected to the end of the base plate 231 away from its vertical plate 2311 by a hinge 2320. A positioning block for clamping the container is provided between the movable plate 232 and the vertical plate 2311. Preferably, the positioning block includes a first positioning block. The first positioning block 2301 is symmetrically arranged on the lower part of the movable plate 232 and the upright plate 2311, and the second positioning block 2302 is symmetrically arranged on the upper part of the movable plate 232 and the upright plate 2311. The movable plate 232 is provided with a first buckle 261, which is rotatably arranged on the movable plate 232 and a torsion spring is provided between the two. The upright plate 2311 is provided with a second buckle 262. When the movable plate 232 is in a vertical state, the first buckle 261 and the second buckle 262 are engaged, and the positioning block abuts against the container. Specifically, when using clamp 23, by rotating the first latch 261 to disengage it from the second latch 262, the movable plate 232 can be flipped to open clamp 23. The container is placed in the positioning groove 2310, and the movable plate 232 is flipped to position the container. For example, after the shaking bottle 25 is placed in the positioning groove 2310, it can be clamped by a pair of first positioning blocks 2301. After the filter bottle 24 is placed in the positioning groove 2310, it is clamped by a pair of positioning blocks 2301 in the squeeze bottle body 243, and the filter 242 is clamped by a pair of second positioning blocks 2302. According to the external structural features of the filter 242, a corresponding receiving groove 2303 can be set on the second positioning block 2302 to cooperate with the filter 242. Thus, the first positioning block 2301 and the second positioning block 2302 act on the lower and upper parts of the filter bottle 24 respectively, and then the clamp 23 is closed by the first latch 261 and the second latch 262, ensuring the stability of the container in clamp 23.

[0032] Furthermore, the stepper extrusion assembly 22 includes a first stepper motor 221, a first transmission component 222, a first slider 223, and an extrusion bracket 224. A mounting bracket 220 is provided on the stepper oscillator 21 or the housing 100. The first stepper motor 221 is mounted on the mounting bracket 220. The first transmission component 222 is rotatably mounted on the output end of the first stepper motor 221. The first slider 223 is mounted on the first transmission component 222 and can slide and translate on the mounting bracket 220. For example, the first transmission component 222 and the first slider 223 form a screw and nut pair structure. The extrusion bracket 224 is mounted on the first slider 223 for extruding the container. The first stepper motor 221 drives the first transmission component 222 to rotate. The first transmission component 222 drives the first slider 223 to move the extrusion bracket 224. After passing through the through hole 2300 through the end of the extrusion bracket 224, the extrusion bottle body 243 of the filter bottle 24 is extruded. In addition, the mounting bracket 220 is equipped with a first limit switch 2251 and a second limit switch 2252 to detect the position of the first slider 223 and / or to return it to zero, so as to ensure the degree of compression of the squeeze bottle 243.

[0033] like Figure 7 As shown, for the liquid dispensing module 300, its X-axis assembly 31 includes a second stepper motor 311, a second transmission component 312, and a second slider 313. The second transmission component 312 is disposed at the output end of the second stepper motor 311, and the second slider 313 is disposed on the second transmission component 312 to form a lead screw and nut pair structure. The first Z-axis assembly 32 includes a third stepper motor 321, a third transmission component 322, and a third slider 323. The third stepper motor 321 is disposed on the second slider 313 through a mounting plate 320. The third transmission component 322 is disposed at the output end of the third stepper motor 321, and the third slider 323 is disposed on the third transmission component 322 to form a lead screw and nut pair structure. The liquid suction assembly 33 is disposed on the third slider 323. Through the cooperation of the above structures, the second stepper motor 311 and the third stepper motor 321 work together to drive the liquid suction assembly 33 and the pipette head 50 located on the liquid suction assembly 33 to move in the X and Z directions. In addition, a third limit switch 3141 and a fourth limit switch 3142 are provided for detecting the position of the second slider 313 and / or for zeroing, and a fifth limit switch 3241 and a sixth limit switch 3242 are provided for detecting the position of the third slider 323 and / or for zeroing, which can ensure the accurate movement of the liquid aspiration assembly 33 and the pipette tip 50.

[0034] Preferably, the liquid suction assembly 33 includes a protective shell 330, a fourth stepper motor 331, a fourth transmission component 332, a fourth slider 333, and a liquid suction part 334. The protective shell 330 is disposed at the output end of the first Z-axis assembly 32, i.e., on the third slider 323. The fourth stepper motor 331 is disposed on the protective shell 330. The fourth transmission component 332 is disposed at the output end of the fourth stepper motor 331. The fourth slider 333 is disposed on the fourth transmission component 332 to form a lead screw and nut pair structure. The liquid suction part 334 includes a piston 3341 and a syringe 3342. The syringe 3342 is disposed on the protective shell 330 via a mounting block 3301. The piston 3341 is connected to the fourth slider 333, and its lower end extends into the syringe 3342. The pipette tip 50 is disposed at the lower end of the syringe 3342. Through the cooperation of the above structures, the fourth stepper motor 331 drives the piston 3341 to move up and down in the syringe 3342 to suction and discharge liquid. In addition, a seventh limit switch 3351 is provided to detect the position of the fourth slider 333 and / or to return it to zero, which can prevent the piston 3341 from disengaging upward from the injection cylinder 3342.

[0035] Furthermore, the device also includes a liquid level detection sensor 106, which is mounted on the housing 100 and located beside the oscillating squeezing module 200. After the pipette tip 50 draws liquid from the oscillating squeezing module 200, it is driven by the X-axis assembly 31 and the first Z-axis assembly 32 to move to the liquid level detection sensor 106. The sensor can detect whether the amount of liquid drawn by the pipette tip 50 meets the requirements. If the detection is qualified, the next operation can be performed. If no liquid is detected, the previous liquid drawing operation is returned. If no liquid is drawn in the second cycle, the machine stops and alarms, requiring manual intervention.

[0036] like Figure 8 and Figure 9As shown, for the snap-fit ​​feeding module 400, its first Y-axis assembly 41 includes a fifth stepper motor 411, a fifth transmission component 412, and a fifth slider 413. The fifth transmission component 412 is disposed at the output end of the fifth stepper motor 411, and the fifth slider 413 is disposed on the fifth transmission component 412 to form a lead screw and nut pair structure. The receiving plate 42 is disposed on the fifth slider 413, and multiple acupoints 421 are arranged side by side on the receiving plate 42 and are driven by the fifth stepper motor 411 to be located below the hopper 44 to respectively support the ion membrane carrier 40. The receiving plate 42 is provided with a shaping block 422. By contacting the ion membrane carrier 40 located at the bottom of the hopper 44 with the shaping block 422, the ion membrane carrier 40 can be prevented from getting stuck in the hopper 44, so that the ion membrane carrier 40 can fall smoothly into the acupoint 421. The top feeding assembly 43 includes a solenoid valve 431 and a top feeding block 432 disposed at the output end of the solenoid valve 431. The top feeding block 432 is located in the lower part of the hopper 44. The top feeding block 432 extends into the hopper 44 and abuts against the side wall of the ion membrane carrier 40. It is driven to separate from the ion membrane carrier 40 in the lower part of the hopper 44, so that the ion membrane carrier 40 at the lowest end can fall into the cavity 421. The top feeding block 432 is then driven to abut against the ion membrane carrier above the ion membrane carrier in the cavity 421. Then the receiving plate 42 can drive the ion membrane carrier in the cavity 421 to detach from the hopper 44, so that the pipette tip 50 can apply liquid to it. In addition, an eighth limit switch 4141 and a ninth limit switch 4142 are provided to detect the position status of the fifth slider 413 and / or for zeroing.

[0037] like Figure 10 As shown, for the pipette tip module 500, its second Y-axis assembly 51 includes a sixth stepper motor 511, a sixth transmission component 512, and a sixth slider 513. The sixth transmission component 512 is disposed at the output end of the sixth stepper motor 511, and the sixth slider 513 is disposed on the sixth transmission component 512 to form a lead screw and nut pair structure. The pipette tip holder 52 is disposed on the sixth slider 513 and is driven to precisely align with the aspiration assembly 33 driven by the X-axis assembly 31 and the first Z-axis assembly 32 in the liquid dispensing module 300 so as to install the pipette tip 50 on the aspiration assembly 33. In addition, a tenth limit switch 5141 and an eleventh limit switch 5142 are provided to detect the position status of the sixth slider 513 and / or for zeroing.

[0038] In a preferred embodiment of the present invention, the housing 100 includes a main housing 101 and a transparent housing 102. The transparent housing 102 is hinged to the main housing 101, and the housing 100 can be opened. The working conditions inside the housing 100 can also be observed through the transparent housing 102. The touch screen 1020 is disposed on the transparent housing 102 and can be used to control the operation of the entire device. The main housing 101 is also provided with an accordion dust cover 103, which serves as an internal dust cover and follows the compression and stretching motion as the liquid dispensing module 300 moves back and forth. The housing 100 also includes a controller 107, a driver 108, a power socket 109, and a switching power supply 1010. The controller 107 and driver 108 are fixed on the main housing 101 and are used to control and drive each stepper motor and the components connected to the stepper motor (when each stepper motor moves, the touch screen 1020 sends a command to the controller 107, and the controller 107 controls one of the driver 108 to move further after receiving the command). The power socket 1010 is used to supply power and switch the main power of the equipment. The switching power supply 1011 is used to provide 24V DC power to the equipment. When the container is a shaking bottle 25, after positioning the shaking bottle 25 on the clamp 23, select the "Individual Shaking" mode on the touch screen 1020, set the rotation speed and oscillation duration, and click start. The controller 107 receives the instruction and controls one path of the driver 108, further controlling the stepper oscillator 21 to oscillate according to the program-set rotation speed and time (eccentric oscillation, no self-rotation). When the container is a filter bottle 24, select the "Shaking Extraction" mode on the touch screen 102, set the rotation speed and oscillation duration, and click start. The controller 107 receives the instruction and controls one path of the driver 108, further controlling the stepper oscillator 21 to oscillate according to the program-set rotation speed and time. At the same time, the snap-fit ​​feeding module 400 opens. Upon initial operation, controller 107 controls one path of driver 108, which in turn controls the fifth stepper motor 411 to drive receiving plate 42 to move to the first receiving position. Solenoid valve 431 drives top block 432 away from ion membrane carrier 40 in hopper 44. Ion membrane carrier 40 falls into cavity 421 under gravity. Other cavities are similarly filled with ion membrane carrier 40 (the number of ion membrane carriers 40 filled into receiving plate 42 is the same as the number of filter bottles 24 filled into clamp 23). After oscillation, extrusion bracket 224 moves in the positive Y direction under the drive of step extrusion assembly 22, extruding filter bottle 24. Liquid in extrusion bottle 243 is filtered through filter 242 under pressure and flows to overflow port 241 for temporary storage. The X-axis assembly 31 drives the aspiration assembly 33 and the pipette tip 50 to move to the top of the pipette tip module 500, to the first position on the right of the first row. At this time, the end of the syringe 3342 is aligned with the pipette tip 50 at the first position on the right of the first row of the pipette tip holder 520. The first Z-axis assembly 32 moves down until the end of the syringe 3342 is inserted into the corresponding position of the pipette tip 50 (the XYZ axis movement distance is controlled by the program).The first Z-axis assembly 32 drives the suction assembly 33 and the pipette tip 50 to move to the top of the oscillating squeezing module 200, to the first position in the X-direction (the specific position is the actual placement position and the maintenance position selected on the touch screen). The first Z-axis assembly 32 moves down until the pipette tip 50 is inserted into the overflow port 241. The piston 3341, driven by the fourth stepper motor 331, moves along the Z+ direction to the position of the seventh limit switch 3351, completing the suction. The first Z-axis assembly 32 then moves up to the position of the fifth limit switch 3241, i.e., the zero point of the first Z-axis. The X-axis assembly 31 drives the suction... The liquid assembly 33 and the pipette tip 50 move to the position of the liquid level detection sensor 106. The first Z-axis assembly 32 moves down until the pipette tip 50 is inserted into the liquid level detection sensor 106 for liquid level detection. After the detection is successful, the X-axis assembly 31 drives the liquid aspiration assembly 33 and the pipette tip 50 to move to the upper part of the snap-on feeding module 400. After aligning with the first ion membrane carrier 40 in the Y+ direction of the receiving plate 42, the first Z-axis assembly 32 moves down until the pipette tip 50 approaches the ion membrane carrier 40. The piston 3341 moves along the Z- direction under the drive of the fourth stepper motor 331. At the limit position, liquid is squeezed onto the ion membrane on the ion membrane carrier 40. The heating fan 104 is turned on to rapidly heat and dry the droplets on the ion membrane. At the same time, the first Z-axis assembly 32 moves upward to the fifth limit switch 3241 position. Then, the X-axis assembly 31 drives the liquid suction assembly 33 and the pipette tip 50 to move to the peeling head 105 position. The first Z-axis assembly 32 moves downward until the pipette tip 50 is below the peeling head 105. Then, the X-axis assembly 31 drives the liquid suction assembly 33 to move a set distance in the X- direction. The upper edge of the pipette tip 50 contacts the peeling head 105. The first Z-axis assembly... The component 32 moves upward to complete the peeling of the pipette tip 50 until the first Z-axis component 32 moves upward to the fifth limit switch 3241 position. At this time, the X-axis component 31 is located at the third limit switch 3141 position. This state is the initial position of the liquid picking module 300. Then the next cycle begins. In the next cycle, the pipette tip 50 is picked up and used sequentially from the X+ direction to the Y- direction. The ion membrane carrier 40 drips liquid sequentially from the Y- direction. After the liquid is dripped in the whole cycle, the receiving plate 42 is driven to the eighth limit switch 4141 position, waiting for manual picking and testing. In summary, in this invention, the clamp 23 has a quick-release function, facilitating container placement and removal. The universal clamp cavity design can accommodate the fixed oscillation of two types of containers (filter bottle 24 and shaking bottle 25). Furthermore, the stepper oscillator 21 uses closed-loop control of a stepper motor, ensuring consistent oscillation effect through speed and rotation control. The ion membrane carrier 40 uses a stacked feeding method to carry the ion membrane, and the pipette tips 50 are arranged in a matrix for feeding. The centralized feeding method for consumables reduces manual operation time. The overall modular design is simple in structure and easy to operate and maintain.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An automated ion-exchange membrane pretreatment device for soil testing, comprising a housing, characterized in that, Also includes: An oscillating squeezing module includes a stepping oscillator, a stepping squeezing assembly, and a clamp. The clamp is mounted on the stepping oscillator and has at least one positioning slot. A container is placed in the positioning slot. The output end of the stepping squeezing assembly is driven to extend into the clamp and squeeze the container, pushing the liquid inside upwards to the top of the container. The liquid dispensing module includes an X-axis assembly, a first Z-axis assembly, and a liquid suction assembly. The first Z-axis assembly is located at the output end of the X-axis assembly, and the liquid suction assembly is located at the output end of the first Z-axis assembly. A pipette tip is mounted on the lower end of the liquid suction assembly, and is driven to move above the container to aspirate the liquid squeezed to the top of the container. The snap-fit ​​feeding module includes a first Y-axis assembly, a receiving plate, and a hopper. Multiple ion membrane carriers are stacked in the hopper, and a top feeding assembly for feeding a single ion membrane carrier is provided at the lower end. The receiving plate is disposed on the first Y-axis assembly and has at least one cavity. The receiving plate is driven to extend into the lower end of the hopper so that the cavity carries the ion membrane carrier. The ion membrane carrier is used to hold liquid fed by a pipette tip. The stepper extrusion assembly includes a first stepper motor, a first transmission component, a first slider, and an extrusion bracket. The first transmission component is disposed at the output end of the first stepper motor, the first slider is disposed on the first transmission component, and the extrusion bracket is disposed on the first slider for extruding a container. The first Y-axis assembly includes a fifth stepper motor, a fifth transmission component, and a fifth slider. The fifth transmission component is located at the output end of the fifth stepper motor, the fifth slider is located on the fifth transmission component, the receiving plate is located on the fifth slider, and the receiving plate is provided with a shaping block. The top material assembly includes a solenoid valve and a top material block located at the output end of the solenoid valve. The top material block extends into the material bin and abuts against the side wall of the ion membrane carrier. A heating fan is provided on the housing next to the material bin.

2. The automated ion-exchange membrane pretreatment device for soil testing according to claim 1, characterized in that, The container includes a shaking bottle or a filter bottle. When the container is a shaking bottle, an ion membrane carrier is provided on the shaking bottle. When the container is a filter bottle, the filter bottle includes a squeeze bottle body, a filter and an overflow port connected sequentially from bottom to top. The liquid inside the squeeze bottle body is squeezed upwards and filtered by the filter before entering the overflow port. The overflow port is funnel-shaped.

3. The automated ion-exchange membrane pretreatment device for soil testing according to claim 1 or 2, characterized in that, The fixture includes a base plate and a movable plate. The base plate is disposed at the output end of the stepper oscillator. The positioning groove is formed on the base plate. One end of the base plate is provided with a vertical plate. The vertical plate is provided with a through hole for the output end of the stepper extrusion assembly to extend into. The movable plate is hinged to the other end of the base plate, and a positioning block for clamping the container is provided between the movable plate and the vertical plate. The movable plate is provided with a first buckle, and the vertical plate is provided with a second buckle. When the movable plate is in a vertical state, the first buckle and the second buckle are engaged, and the positioning block abuts against the container.

4. The automated ion-exchange membrane pretreatment device for soil testing according to claim 1, characterized in that, The X-axis assembly includes a second stepper motor, a second transmission component, and a second slider. The second transmission component is disposed at the output end of the second stepper motor, and the second slider is disposed on the second transmission component. The first Z-axis assembly includes a third stepper motor, a third transmission component, and a third slider. The third stepper motor is disposed on the second slider, the third transmission component is disposed at the output end of the third stepper motor, and the third slider is disposed on the third transmission component. The liquid suction component is disposed on the third slider.

5. The automated ion-exchange membrane pretreatment device for soil testing according to claim 1 or 4, characterized in that, The liquid aspiration assembly includes a protective shell, a fourth stepper motor, a fourth transmission component, a fourth slider, and a liquid aspiration section. The protective shell is disposed at the output end of the first Z-axis assembly. The fourth stepper motor is disposed on the protective shell. The fourth transmission component is disposed at the output end of the fourth stepper motor. The fourth slider is disposed on the fourth transmission component. The liquid aspiration section includes a syringe and a piston. The syringe is disposed on the protective shell. The piston is connected to the fourth slider, and its lower end extends into the syringe. The pipette tip is disposed at the lower end of the syringe.

6. The automated ion-exchange membrane pretreatment device for soil testing according to claim 1, characterized in that, It also includes a liquid level detection sensor, which is mounted on the housing and located next to the oscillating squeezing module.

7. The automated ion-exchange membrane pretreatment device for soil testing according to claim 1, characterized in that, It also includes a pipette tip module, which includes a second Y-axis assembly, a tip holder, and a disengagement head. The tip holder is disposed on the second Y-axis assembly and has multiple limiting holes for positioning the pipette tip. The disengagement head is disposed on the housing. The aspiration assembly is driven to disengage the upper end of the pipette tip located at its lower end from the disengagement head and is then driven to connect with the pipette tip located on the tip holder.

8. The automated ion-exchange membrane pretreatment device for soil testing according to claim 7, characterized in that, The second Y-axis assembly includes a sixth stepper motor, a sixth transmission component, and a sixth slider. The sixth transmission component is disposed at the output end of the sixth stepper motor, the sixth slider is disposed on the sixth transmission component, and the gun head seat is disposed on the sixth slider.

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